Report Analysis

Generated at 2020-10-11T16:23:40+0000 for charles.hoffman@me.com. This page will remain online for about 48 hours.

Report

Submitted: http://www.sec.gov/Archives/edgar/data/789019/000156459017014900/msft-20170630.xml
For more information: http://logicalcontracts.com/xbrl-and-sbrm-reporting/
DISCLAIMER: this analysis is provided by software still under development, and likely incomplete or even erroneous; do NOT use it other than for experimental, inconsequential purposes

User Alterations

NONE

	TERMS
100000 - Document - Document and Entity Information	Structures	Facts
100010 - Statement - INCOME STATEMENTS	Structures	Facts
100020 - Statement - COMPREHENSIVE INCOME STATEMENTS	Structures	Facts
100030 - Statement - COMPREHENSIVE INCOME STATEMENTS (Parenthetical)	Structures	Facts
100040 - Statement - BALANCE SHEETS	Structures	Facts
100050 - Statement - BALANCE SHEETS (Parenthetical)	Structures	Facts
100060 - Statement - CASH FLOWS STATEMENTS	Structures	Facts
100070 - Statement - STOCKHOLDERS' EQUITY STATEMENTS	Structures	Facts
100080 - Disclosure - ACCOUNTING POLICIES	Structures	Facts
100090 - Disclosure - EARNINGS PER SHARE	Structures	Facts
100100 - Disclosure - OTHER INCOME (EXPENSE), NET	Structures	Facts
100110 - Disclosure - INVESTMENTS	Structures	Facts
100120 - Disclosure - DERIVATIVES	Structures	Facts
100130 - Disclosure - FAIR VALUE MEASUREMENTS	Structures	Facts
100140 - Disclosure - INVENTORIES	Structures	Facts
100150 - Disclosure - PROPERTY AND EQUIPMENT	Structures	Facts
100160 - Disclosure - BUSINESS COMBINATIONS	Structures	Facts
100170 - Disclosure - GOODWILL	Structures	Facts
100180 - Disclosure - INTANGIBLE ASSETS	Structures	Facts
100190 - Disclosure - DEBT	Structures	Facts
100200 - Disclosure - INCOME TAXES	Structures	Facts
100210 - Disclosure - RESTRUCTURING CHARGES	Structures	Facts
100220 - Disclosure - UNEARNED REVENUE	Structures	Facts
100230 - Disclosure - COMMITMENTS	Structures	Facts
100240 - Disclosure - CONTINGENCIES	Structures	Facts
100250 - Disclosure - STOCKHOLDERS' EQUITY	Structures	Facts
100260 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME	Structures	Facts
100270 - Disclosure - EMPLOYEE STOCK AND SAVINGS PLANS	Structures	Facts
100280 - Disclosure - SEGMENT INFORMATION AND GEOGRAPHIC DATA	Structures	Facts
100290 - Disclosure - QUARTERLY INFORMATION (UNAUDITED)	Structures	Facts
100300 - Disclosure - ACCOUNTING POLICIES (Policies)	Structures	Facts
100310 - Disclosure - ACCOUNTING POLICIES (Tables)	Structures	Facts
100320 - Disclosure - EARNINGS PER SHARE (Tables)	Structures	Facts
100330 - Disclosure - OTHER INCOME (EXPENSE), NET (Tables)	Structures	Facts
100340 - Disclosure - INVESTMENTS (Tables)	Structures	Facts
100350 - Disclosure - DERIVATIVES (Tables)	Structures	Facts
100360 - Disclosure - FAIR VALUE MEASUREMENTS (Tables)	Structures	Facts
100370 - Disclosure - INVENTORIES (Tables)	Structures	Facts
100380 - Disclosure - PROPERTY AND EQUIPMENT (Tables)	Structures	Facts
100390 - Disclosure - BUSINESS COMBINATIONS (Tables)	Structures	Facts
100400 - Disclosure - GOODWILL (Tables)	Structures	Facts
100410 - Disclosure - INTANGIBLE ASSETS (Tables)	Structures	Facts
100420 - Disclosure - DEBT (Tables)	Structures	Facts
100430 - Disclosure - INCOME TAXES (Tables)	Structures	Facts
100440 - Disclosure - RESTRUCTURING CHARGES (Tables)	Structures	Facts
100450 - Disclosure - UNEARNED REVENUE (Tables)	Structures	Facts
100460 - Disclosure - COMMITMENTS (Tables)	Structures	Facts
100470 - Disclosure - STOCKHOLDERS' EQUITY (Tables)	Structures	Facts
100480 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables)	Structures	Facts
100490 - Disclosure - EMPLOYEE STOCK AND SAVINGS PLANS (Tables)	Structures	Facts
100500 - Disclosure - SEGMENT INFORMATION AND GEOGRAPHIC DATA (Tables)	Structures	Facts
100510 - Disclosure - QUARTERLY INFORMATION (UNAUDITED) (Tables)	Structures	Facts
100520 - Disclosure - Accounting Policies - Additional Information (Detail)	Structures	Facts
100530 - Disclosure - Allowance for Doubtful Accounts (Detail)	Structures	Facts
100540 - Disclosure - Expected Impacts of Adoption of Standards Related to Revenue Recognition and Leases to Reported Results - (Detail)	Structures	Facts
100550 - Disclosure - Basic and Diluted Earnings Per Share (Detail)	Structures	Facts
100560 - Disclosure - Components of Other Income (Expense), Net (Detail)	Structures	Facts
100570 - Disclosure - Net Recognized Gains (Losses) on Investments (Detail)	Structures	Facts
100580 - Disclosure - Investment Components, Including Associated Derivatives (Detail)	Structures	Facts
100590 - Disclosure - Investments - Cost Method - Additional Information (Detail)	Structures	Facts
100600 - Disclosure - Investments - Secured Borrowings and Loaned Securities - Additional Information (Detail)	Structures	Facts
100610 - Disclosure - Unrealized Losses on Investments (Detail)	Structures	Facts
100620 - Disclosure - Debt Investment Maturities (Detail)	Structures	Facts
100630 - Disclosure - Derivatives - Additional Information (Detail)	Structures	Facts
100640 - Disclosure - Fair Values of Derivative Instruments (Detail)	Structures	Facts
100650 - Disclosure - Gains (Losses) on Fair Value Hedges and Related Hedged Items (Detail)	Structures	Facts
100660 - Disclosure - Gains (Losses) Related to Cash Flow Hedges (Detail)	Structures	Facts
100670 - Disclosure - Gains (Losses) Related to Cash Flow Hedges (Parenthetical) (Detail)	Structures	Facts
100680 - Disclosure - Non-Designated Derivative Gains (Losses) (Detail)	Structures	Facts
100690 - Disclosure - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail)	Structures	Facts
100700 - Disclosure - Reconciliation of Total Assets Measured at Fair Value on Recurring Basis to Balance Sheet Presentation (Detail)	Structures	Facts
100710 - Disclosure - Components of Inventories (Detail)	Structures	Facts
100720 - Disclosure - Components of Property and Equipment (Detail)	Structures	Facts
100730 - Disclosure - Property and Equipment - Additional Information (Detail)	Structures	Facts
100740 - Disclosure - Business Combinations - Additional Information (Detail)	Structures	Facts
100750 - Disclosure - Major Classes of Assets and Liabilities to Which We Allocated the Purchase Price (Detail)	Structures	Facts
100760 - Disclosure - Major Classes of Assets and Liabilities to Which We Allocated the Purchase Price (Parenthetical) (Detail)	Structures	Facts
100770 - Disclosure - Acquired Intangible Assets (Detail)	Structures	Facts
100780 - Disclosure - Revenue and Operating Loss Attributable to Acquiree, Since the Date of Acquisition (Detail)	Structures	Facts
100790 - Disclosure - Supplemental Consolidated Financial Results on Unaudited Pro Forma Basis, as If the Acquisition Had Been Consummated on Beginning of Period (Detail)	Structures	Facts
100800 - Disclosure - Carrying Amount of Goodwill (Detail)	Structures	Facts
100810 - Disclosure - Goodwill - Additional Information (Detail)	Structures	Facts
100820 - Disclosure - Finite-Lived Intangible Assets (Detail)	Structures	Facts
100830 - Disclosure - Finite-Lived Intangible Assets (Parenthetical) (Detail)	Structures	Facts
100840 - Disclosure - Intangible Assets - Additional Information (Detail)	Structures	Facts
100850 - Disclosure - Intangible Assets Acquired (Detail)	Structures	Facts
100860 - Disclosure - Estimated Future Amortization Expense Related to Intangible Assets (Detail)	Structures	Facts
100870 - Disclosure - Debt - Additional Information (Detail)	Structures	Facts
100880 - Disclosure - Long-term Debt (Detail)	Structures	Facts
100890 - Disclosure - Long-term Debt (Parenthetical) (Detail)	Structures	Facts
100900 - Disclosure - Maturities of Long-term Debt (Detail)	Structures	Facts
100910 - Disclosure - Provision for Income Taxes (Detail)	Structures	Facts
100920 - Disclosure - Income Taxes - Additional Information (Detail)	Structures	Facts
100930 - Disclosure - Income (Loss) Before Income Taxes (Detail)	Structures	Facts
100940 - Disclosure - Difference Between Income Taxes Computed at Federal Statutory Rate and Provision for Income Taxes (Detail)	Structures	Facts
100950 - Disclosure - Deferred Income Tax Assets and Liabilities (Detail)	Structures	Facts
100960 - Disclosure - Changes in Unrecognized Tax Benefits (Detail)	Structures	Facts
100970 - Disclosure - Income Taxes - Additional Information Regarding Examinations (Detail)	Structures	Facts
100980 - Disclosure - Restructuring Charges - Additional Information (Detail)	Structures	Facts
100990 - Disclosure - Changes in Restructuring Liability (Detail)	Structures	Facts
101000 - Disclosure - Unearned Revenue by Segment (Detail)	Structures	Facts
101010 - Disclosure - Commitments - Additional Information (Detail)	Structures	Facts
101020 - Disclosure - Future Minimum Rental Commitments Under Non-cancellable Operating Leases (Detail)	Structures	Facts
101030 - Disclosure - Future Minimum Lease Payments under Non-cancellable Capital Leases (Detail)	Structures	Facts
101040 - Disclosure - Future Minimum Lease Payments under Non-cancellable Capital Leases (Parenthetical) (Detail)	Structures	Facts
101050 - Disclosure - Contingencies - Additional Information (Detail)	Structures	Facts
101060 - Disclosure - Shares of Common Stock Outstanding (Detail)	Structures	Facts
101070 - Disclosure - Stockholders' Equity - Additional Information (Detail)	Structures	Facts
101080 - Disclosure - Share Repurchases (Detail)	Structures	Facts
101090 - Disclosure - Dividends Declared (Detail)	Structures	Facts
101100 - Disclosure - Summary of Changes in Accumulated Other Comprehensive Income by Component (Detail)	Structures	Facts
101110 - Disclosure - Summary of Changes in Accumulated Other Comprehensive Income by Component (Parenthetical) (Detail)	Structures	Facts
101120 - Disclosure - Employee Stock and Savings Plans - Additional Information (Detail)	Structures	Facts
101130 - Disclosure - Stock-Based Compensation Expense and Related Income Tax Benefits (Detail)	Structures	Facts
101140 - Disclosure - Assumptions Used in Estimating the Fair Value of Stock Award Grants (Detail)	Structures	Facts
101150 - Disclosure - Stock Plan Activity (Detail)	Structures	Facts
101160 - Disclosure - Stock Plan Activity (Parenthetical) (Detail)	Structures	Facts
101170 - Disclosure - Employee Purchased Shares (Detail)	Structures	Facts
101180 - Disclosure - Segment Revenue (Detail)	Structures	Facts
101190 - Disclosure - Operating Income (Loss) by Segment (Detail)	Structures	Facts
101200 - Disclosure - Corporate and Other Operating Income (Loss) Activity (Detail)	Structures	Facts
101210 - Disclosure - Segment Information and Geographic Data - Additional Information (Detail)	Structures	Facts
101220 - Disclosure - Revenue Classified by Major Geographic Areas (Detail)	Structures	Facts
101230 - Disclosure - Revenue Classified by Significant Product and Service Offerings (Detail)	Structures	Facts
101240 - Disclosure - Revenue Classified by Significant Product and Service Offerings (Parenthetical) (Detail)	Structures	Facts
101250 - Disclosure - Long-Lived Assets, Excluding Financial Instruments and Tax Assets, Classified by Location of Controlling Statutory Company (Detail)	Structures	Facts
101260 - Disclosure - Quarterly Information (Unaudited) (Detail)	Structures	Facts
101270 - Disclosure - Quarterly Information (Unaudited) (Parenthetical) (Detail)	Structures	Facts
	RULES
	Errors and Warnings

Terms

Terms shown are only those effectively used by the report instance.

#	Label	Data Type	Period Type	Balance Type	Abstract	Prefix	Name, Documentation, References
1	Award Type [Axis]	xbrli:stringItemType	duration		true	us-gaap	AwardTypeAxis
2	us-gaap:AccountingStandardsUpdate201409Member (label)	nonnum:domainItemType	duration		true	us-gaap	AccountingStandardsUpdate201409Member
3	us-gaap:AccountingStandardsUpdate201602Member (label)	nonnum:domainItemType	duration		true	us-gaap	AccountingStandardsUpdate201602Member
4	Accounting Policies [Abstract]	xbrli:stringItemType	duration		true	us-gaap	AccountingPoliciesAbstract
5	us-gaap:AccountsReceivableNetCurrent (label)	xbrli:monetaryItemType	instant	debit		us-gaap	AccountsReceivableNetCurrent
6	Accounts Payable Current	xbrli:monetaryItemType	instant	credit		us-gaap	AccountsPayableCurrent
7	Accrued Income Taxes Current	xbrli:monetaryItemType	instant	credit		us-gaap	AccruedIncomeTaxesCurrent
8	Accrued Income Taxes Noncurrent	xbrli:monetaryItemType	instant	credit		us-gaap	AccruedIncomeTaxesNoncurrent
9	Accumulated Other Comprehensive Income Loss [Table]	xbrli:stringItemType	duration		true	us-gaap	AccumulatedOtherComprehensiveIncomeLossTable
10	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	nonnum:domainItemType	duration		true	us-gaap	AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
11	Accumulated Other Comprehensive Income Loss [Line Items]	xbrli:stringItemType	duration		true	us-gaap	AccumulatedOtherComprehensiveIncomeLossLineItems
12	Accumulated Other Comprehensive Income Loss Net Of Tax	xbrli:monetaryItemType	instant	credit		us-gaap	AccumulatedOtherComprehensiveIncomeLossNetOfTax
13	Accumulated Net Unrealized Investment Gain Loss [Member]	nonnum:domainItemType	duration		true	us-gaap	AccumulatedNetUnrealizedInvestmentGainLossMember
14	us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment (label)	xbrli:monetaryItemType	instant	credit		us-gaap	AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
15	Accumulated Other Comprehensive Income [Member]	nonnum:domainItemType	duration		true	us-gaap	AccumulatedOtherComprehensiveIncomeMember
16	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	xbrli:durationItemType	duration			us-gaap	AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
17	Acquired Finite Lived Intangible Assets [Line Items]	xbrli:stringItemType	duration		true	us-gaap	AcquiredFiniteLivedIntangibleAssetsLineItems
18	Adjustment To Additional Paid In Capital Income Tax Effect From Share Based Compensation Net	xbrli:monetaryItemType	duration	credit		us-gaap	AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet
19	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract]	xbrli:stringItemType	duration		true	us-gaap	AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract
20	Adjustments For New Accounting Pronouncements [Axis]	xbrli:stringItemType	duration		true	us-gaap	AdjustmentsForNewAccountingPronouncementsAxis
21	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value	xbrli:monetaryItemType	duration	credit		us-gaap	AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
22	Advertising Expense	xbrli:monetaryItemType	duration	debit		us-gaap	AdvertisingExpense
23	Allocated Share Based Compensation Expense	xbrli:monetaryItemType	duration	debit		us-gaap	AllocatedShareBasedCompensationExpense
24	Allowance For Doubtful Accounts Receivable Current	xbrli:monetaryItemType	instant	credit		us-gaap	AllowanceForDoubtfulAccountsReceivableCurrent
25	Allowance For Doubtful Accounts [Member]	nonnum:domainItemType	duration		true	us-gaap	AllowanceForDoubtfulAccountsMember
26	Amortization Of Intangible Assets	xbrli:monetaryItemType	duration	debit		us-gaap	AmortizationOfIntangibleAssets
27	us-gaap:AssetImpairmentCharges (label)	xbrli:monetaryItemType	duration	debit		us-gaap	AssetImpairmentCharges
28	Asset Backed Securities [Member]	nonnum:domainItemType	duration		true	us-gaap	AssetBackedSecuritiesMember
29	us-gaap:AssetsFairValueDisclosureRecurring (label)	xbrli:monetaryItemType	instant	debit		us-gaap	AssetsFairValueDisclosureRecurring
30	Assets [Abstract]	xbrli:stringItemType	duration		true	us-gaap	AssetsAbstract
31	Assets	xbrli:monetaryItemType	instant	debit		us-gaap	Assets
32	Assets Current [Abstract]	xbrli:stringItemType	duration		true	us-gaap	AssetsCurrentAbstract
33	Assets Current	xbrli:monetaryItemType	instant	debit		us-gaap	AssetsCurrent
34	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss	xbrli:monetaryItemType	instant	debit		us-gaap	AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
35	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss	xbrli:monetaryItemType	instant	debit		us-gaap	AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
36	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss	xbrli:monetaryItemType	instant	debit		us-gaap	AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss
37	Available For Sale Securities Debt Maturities Rolling After Year Ten Amortized Cost Basis	xbrli:monetaryItemType	instant	debit		us-gaap	AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis
38	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Amortized Cost Basis	xbrli:monetaryItemType	instant	debit		us-gaap	AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis
39	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	xbrli:monetaryItemType	instant	credit		us-gaap	AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
40	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value	xbrli:monetaryItemType	instant	debit		us-gaap	AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
41	Available For Sale Securities Continuous Unrealized Loss Position Fair Value	xbrli:monetaryItemType	instant	debit		us-gaap	AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue
42	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Fair Value	xbrli:monetaryItemType	instant	debit		us-gaap	AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue
43	us-gaap:AvailableForSaleSecuritiesCurrent (label)	xbrli:monetaryItemType	instant	debit		us-gaap	AvailableForSaleSecuritiesCurrent
44	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Amortized Cost Basis	xbrli:monetaryItemType	instant	debit		us-gaap	AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis
45	Available For Sale Securities Debt Maturities Rolling After Year Ten Fair Value	xbrli:monetaryItemType	instant	debit		us-gaap	AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue
46	us-gaap:AvailableForSaleSecurities (label)	xbrli:monetaryItemType	instant	debit		us-gaap	AvailableForSaleSecurities
47	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	xbrli:monetaryItemType	instant	debit		us-gaap	AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
48	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value	xbrli:monetaryItemType	instant	debit		us-gaap	AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
49	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Fair Value	xbrli:monetaryItemType	instant	debit		us-gaap	AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue
50	Available For Sale Securities Debt Maturities Amortized Cost Basis Rolling Maturity [Abstract]	xbrli:stringItemType	duration		true	us-gaap	AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostBasisRollingMaturityAbstract
51	Available For Sale Securities Debt Maturities Fair Value Rolling Maturity [Abstract]	xbrli:stringItemType	duration		true	us-gaap	AvailableForSaleSecuritiesDebtMaturitiesFairValueRollingMaturityAbstract
52	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Fair Value	xbrli:monetaryItemType	instant	debit		us-gaap	AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue
53	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost Basis	xbrli:monetaryItemType	instant	debit		us-gaap	AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis
54	Available For Sale Securities Amortized Cost	xbrli:monetaryItemType	instant	debit		us-gaap	AvailableForSaleSecuritiesAmortizedCost
55	Available For Sale Debt Securities Amortized Cost Basis	xbrli:monetaryItemType	instant	debit		us-gaap	AvailableForSaleDebtSecuritiesAmortizedCostBasis
56	Available For Sale Securities Debt Securities	xbrli:monetaryItemType	instant	debit		us-gaap	AvailableForSaleSecuritiesDebtSecurities
57	Available For Sale Securities Gross Realized Losses	xbrli:monetaryItemType	duration	debit		us-gaap	AvailableForSaleSecuritiesGrossRealizedLosses
58	Available For Sale Securities Gross Realized Gains	xbrli:monetaryItemType	duration	credit		us-gaap	AvailableForSaleSecuritiesGrossRealizedGains
59	Balance Sheet Location [Domain]	nonnum:domainItemType	duration		true	us-gaap	BalanceSheetLocationDomain
60	Balance Sheet Location [Axis]	xbrli:stringItemType	duration		true	us-gaap	BalanceSheetLocationAxis
61	Basis Of Accounting Policy Policy [Text Block]	nonnum:textBlockItemType	duration			us-gaap	BasisOfAccountingPolicyPolicyTextBlock
62	Building And Building Improvements [Member]	nonnum:domainItemType	duration		true	us-gaap	BuildingAndBuildingImprovementsMember
63	Building [Member]	nonnum:domainItemType	duration		true	us-gaap	BuildingMember
64	Buildings And Improvements Gross	xbrli:monetaryItemType	instant	debit		us-gaap	BuildingsAndImprovementsGross
65	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deferred Tax Liabilities Noncurrent	xbrli:monetaryItemType	instant	credit		us-gaap	BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent
66	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Marketable Securities	xbrli:monetaryItemType	instant	debit		us-gaap	BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsMarketableSecurities
67	Business Acquisition Effective Date Of Acquisition1	xbrli:dateItemType	duration			us-gaap	BusinessAcquisitionEffectiveDateOfAcquisition1
68	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Other	xbrli:monetaryItemType	instant	debit		us-gaap	BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther
69	Business Acquisitions Pro Forma Revenue	xbrli:monetaryItemType	duration	credit		us-gaap	BusinessAcquisitionsProFormaRevenue
70	Business Acquisition Acquiree [Domain]	nonnum:domainItemType	duration		true	us-gaap	BusinessAcquisitionAcquireeDomain
71	Business Acquisition [Axis]	xbrli:stringItemType	duration		true	us-gaap	BusinessAcquisitionAxis
72	Business Combinations [Abstract]	xbrli:stringItemType	duration		true	us-gaap	BusinessCombinationsAbstract
73	Business Acquisitions Pro Forma Net Income Loss	xbrli:monetaryItemType	duration	credit		us-gaap	BusinessAcquisitionsProFormaNetIncomeLoss
74	Business Acquisition [Line Items]	xbrli:stringItemType	duration		true	us-gaap	BusinessAcquisitionLineItems
75	Business Combination Consideration Transferred1	xbrli:monetaryItemType	duration	credit		us-gaap	BusinessCombinationConsiderationTransferred1
76	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Other	xbrli:monetaryItemType	instant	credit		us-gaap	BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther
77	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Cash And Equivalents	xbrli:monetaryItemType	instant	debit		us-gaap	BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
78	Business Acquisition Name Of Acquired Entity	xbrli:stringItemType	duration			us-gaap	BusinessAcquisitionNameOfAcquiredEntity
79	Business Acquisition Pro Forma Earnings Per Share Diluted	num:perShareItemType	duration			us-gaap	BusinessAcquisitionProFormaEarningsPerShareDiluted
80	Business Acquisition Pro Forma Information [Text Block]	nonnum:textBlockItemType	duration			us-gaap	BusinessAcquisitionProFormaInformationTextBlock
81	Business Acquisition Purchase Price Allocation Goodwill Expected Tax Deductible Amount	xbrli:monetaryItemType	instant	debit		us-gaap	BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount
82	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment	xbrli:monetaryItemType	instant	debit		us-gaap	BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
83	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles (label)	xbrli:monetaryItemType	instant	debit		us-gaap	BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
84	Business Combination Pro Forma Information Earnings Or Loss Of Acquiree Since Acquisition Date Actual	xbrli:monetaryItemType	duration	credit		us-gaap	BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual
85	Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Net	xbrli:monetaryItemType	instant	debit		us-gaap	BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
86	Business Combination Pro Forma Information Revenue Of Acquiree Since Acquisition Date Actual	xbrli:monetaryItemType	duration	credit		us-gaap	BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual
87	Capital Lease Obligations Incurred	xbrli:monetaryItemType	duration	credit		us-gaap	CapitalLeaseObligationsIncurred
88	Capital Leases Future Minimum Payments Due In Three Years	xbrli:monetaryItemType	instant	credit		us-gaap	CapitalLeasesFutureMinimumPaymentsDueInThreeYears
89	Capital Leases Future Minimum Payments Due [Abstract]	xbrli:stringItemType	duration		true	us-gaap	CapitalLeasesFutureMinimumPaymentsDueAbstract
90	Capital Leases Future Minimum Payments Due	xbrli:monetaryItemType	instant	credit		us-gaap	CapitalLeasesFutureMinimumPaymentsDue
91	Capital Leases Future Minimum Payments Due In Five Years	xbrli:monetaryItemType	instant	credit		us-gaap	CapitalLeasesFutureMinimumPaymentsDueInFiveYears
92	Capital Leased Assets Gross	xbrli:monetaryItemType	instant	debit		us-gaap	CapitalLeasedAssetsGross
93	Capital Leases Future Minimum Payments Due Thereafter	xbrli:monetaryItemType	instant	credit		us-gaap	CapitalLeasesFutureMinimumPaymentsDueThereafter
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831	U S D Debt Issued In Period [Member]	nonnum:domainItemType	duration		true	msft	USDDebtIssuedInPeriodMember
832	Reconciliation Of Provision Of Income Taxes [Line Items]	xbrli:stringItemType	duration		true	msft	ReconciliationOfProvisionOfIncomeTaxesLineItems
833	Reconciliation Of Provision Of Income Taxes [Table]	xbrli:stringItemType	duration		true	msft	ReconciliationOfProvisionOfIncomeTaxesTable
834	Income Taxes [Line Items]	xbrli:stringItemType	duration		true	msft	IncomeTaxesLineItems
835	Income Taxes [Table]	xbrli:stringItemType	duration		true	msft	IncomeTaxesTable
836	Phone Business [Member]	nonnum:domainItemType	duration		true	msft	PhoneBusinessMember
837	Impairment Integration And Restructuring Expenses [Member]	nonnum:domainItemType	duration		true	msft	ImpairmentIntegrationAndRestructuringExpensesMember
838	Regional Operating Centers [Member]	nonnum:domainItemType	duration		true	msft	RegionalOperatingCentersMember
839	Schedule Of Components Of Income Before Income Tax Expense Benefit [Line Items]	xbrli:stringItemType	duration		true	msft	ScheduleOfComponentsOfIncomeBeforeIncomeTaxExpenseBenefitLineItems
840	Schedule Of Components Of Income Before Income Tax Expense Benefit [Table]	xbrli:stringItemType	duration		true	msft	ScheduleOfComponentsOfIncomeBeforeIncomeTaxExpenseBenefitTable
841	Effective Income Tax Rate Reconciliation Phone Business Gains Losses	num:percentItemType	duration		false	msft	EffectiveIncomeTaxRateReconciliationPhoneBusinessGainsLosses
842	Effective Income Tax Rate Reconciliation Deductions Excess Tax Benefits Stock Based Compensation	num:percentItemType	duration		false	msft	EffectiveIncomeTaxRateReconciliationDeductionsExcessTaxBenefitsStockBasedCompensation
843	Effective Income Tax Rate Reconciliation Interest Income Expense	num:percentItemType	duration		false	msft	EffectiveIncomeTaxRateReconciliationInterestIncomeExpense
844	Reconciliation Of Statutory Federal Tax Rate [Line Items]	xbrli:stringItemType	duration		true	msft	ReconciliationOfStatutoryFederalTaxRateLineItems
845	Reconciliation Of Statutory Federal Tax Rate [Table]	xbrli:stringItemType	duration		true	msft	ReconciliationOfStatutoryFederalTaxRateTable
846	Foreign Earnings Taxed At Rates Lower Than Us Rate	num:percentItemType	duration		false	msft	ForeignEarningsTaxedAtRatesLowerThanUsRate
847	Schedule Of Deferred Income Tax Assets And Liabilities [Line Items]	xbrli:stringItemType	duration		true	msft	ScheduleOfDeferredIncomeTaxAssetsAndLiabilitiesLineItems
848	Schedule Of Deferred Income Tax Assets And Liabilities [Table]	xbrli:stringItemType	duration		true	msft	ScheduleOfDeferredIncomeTaxAssetsAndLiabilitiesTable
849	Deferred Income Tax Liabilities Noncurrent [Member]	nonnum:domainItemType	duration		true	msft	DeferredIncomeTaxLiabilitiesNoncurrentMember
850	Phone Hardware Restructuring Plan [Member]	nonnum:domainItemType	duration		true	msft	PhoneHardwareRestructuringPlanMember
851	msft:TwentySixteenRestructuringPlanMember (label)	nonnum:domainItemType	duration		true	msft	TwentySixteenRestructuringPlanMember
852	Twenty Seventeen Restructuring Plan [Member]	nonnum:domainItemType	duration		true	msft	TwentySeventeenRestructuringPlanMember
853	Corporate And Reconciling Items [Member]	nonnum:domainItemType	duration		true	msft	CorporateAndReconcilingItemsMember
854	Commitments [Line Items]	xbrli:stringItemType	duration		true	msft	CommitmentsLineItems
855	Commitments [Table]	xbrli:stringItemType	duration		true	msft	CommitmentsTable
856	Building Building Improvements And Leasehold Improvements [Member]	nonnum:domainItemType	duration		true	msft	BuildingBuildingImprovementsAndLeaseholdImprovementsMember
857	Capital Lease [Member]	nonnum:domainItemType	duration		true	msft	CapitalLeaseMember
858	Future Minimum Lease Payments Under Non Cancellable Capital Leases [Line Items]	xbrli:stringItemType	duration		true	msft	FutureMinimumLeasePaymentsUnderNonCancellableCapitalLeasesLineItems
859	Future Minimum Lease Payments Under Non Cancellable Capital Leases [Table]	xbrli:stringItemType	duration		true	msft	FutureMinimumLeasePaymentsUnderNonCancellableCapitalLeasesTable
860	Share Repurchases [Line Items]	xbrli:stringItemType	duration		true	msft	ShareRepurchasesLineItems
861	Share Repurchases [Table]	xbrli:stringItemType	duration		true	msft	ShareRepurchasesTable
862	Share Repurchase Program Twenty Thirteen [Member]	nonnum:domainItemType	duration		true	msft	ShareRepurchaseProgramTwentyThirteenMember
863	Share Repurchase Program Twenty Sixteen [Member]	nonnum:domainItemType	duration		true	msft	ShareRepurchaseProgramTwentySixteenMember
864	Dividends [Line Items]	xbrli:stringItemType	duration		true	msft	DividendsLineItems
865	Dividends [Table]	xbrli:stringItemType	duration		true	msft	DividendsTable
866	Accumulated Translation Adjustment And Other [Member]	nonnum:domainItemType	duration		true	msft	AccumulatedTranslationAdjustmentAndOtherMember
867	Compensation Related Costs Disclosure [Line Items]	xbrli:stringItemType	duration		true	msft	CompensationRelatedCostsDisclosureLineItems
868	Compensation Related Costs Disclosure [Table]	xbrli:stringItemType	duration		true	msft	CompensationRelatedCostsDisclosureTable
869	Executive Incentive Plan [Member]	nonnum:domainItemType	duration		true	msft	ExecutiveIncentivePlanMember
870	First Six Percent Of Participant Contributions [Member]	nonnum:domainItemType	duration		true	msft	FirstSixPercentOfParticipantContributionsMember
871	I R S Compensation Limit [Member]	nonnum:domainItemType	duration		true	msft	IRSCompensationLimitMember
872	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividends Per Share	num:perShareItemType	duration		false	msft	ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendsPerShare
873	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Method Used [Line Items]	xbrli:stringItemType	duration		true	msft	ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMethodUsedLineItems
874	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Method Used [Table]	xbrli:stringItemType	duration		true	msft	ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMethodUsedTable
875	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Assumed Acquisition In Period	xbrli:sharesItemType	duration		false	msft	ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAssumedAcquisitionInPeriod
876	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Assumed In Acquisitions Weighted Average Grant Date Fair Value	num:perShareItemType	duration		false	msft	ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAssumedInAcquisitionsWeightedAverageGrantDateFairValue
877	Stock Issued Employee Stock Purchase Plan Average Price Per Share	num:perShareItemType	duration		false	msft	StockIssuedEmployeeStockPurchasePlanAveragePricePerShare
878	Employee Stock Purchase Plan [Line Items]	xbrli:stringItemType	duration		true	msft	EmployeeStockPurchasePlanLineItems
879	Employee Stock Purchase Plan [Table]	xbrli:stringItemType	duration		true	msft	EmployeeStockPurchasePlanTable
880	Geographic Information [Line Items]	xbrli:stringItemType	duration		true	msft	GeographicInformationLineItems
881	Geographic Information [Table]	xbrli:stringItemType	duration		true	msft	GeographicInformationTable
882	Microsoft Office System [Member]	nonnum:domainItemType	duration		true	msft	MicrosoftOfficeSystemMember
883	Server Products And Tools [Member]	nonnum:domainItemType	duration		true	msft	ServerProductsAndToolsMember
884	Xbox [Member]	nonnum:domainItemType	duration		true	msft	XboxMember
885	Windows Operating Systems For Computing Devices [Member]	nonnum:domainItemType	duration		true	msft	WindowsOperatingSystemsForComputingDevicesMember
886	Advertising [Member]	nonnum:domainItemType	duration		true	msft	AdvertisingMember
887	Consulting And Product Support Services [Member]	nonnum:domainItemType	duration		true	msft	ConsultingAndProductSupportServicesMember
888	Other Products And Services [Member]	nonnum:domainItemType	duration		true	msft	OtherProductsAndServicesMember
889	Products Or Services Secondary Categorization [Axis]	xbrli:stringItemType	duration		true	msft	ProductsOrServicesSecondaryCategorizationAxis
890	Products Or Services Name Secondary Categorization [Domain]	nonnum:domainItemType	duration		true	msft	ProductsOrServicesNameSecondaryCategorizationDomain
891	Commercial Cloud [Member]	nonnum:domainItemType	duration		true	msft	CommercialCloudMember
892	Certain Long Lived Assets By Geography [Line Items]	xbrli:stringItemType	duration		true	msft	CertainLongLivedAssetsByGeographyLineItems
893	Certain Long Lived Assets By Geography [Table]	xbrli:stringItemType	duration		true	msft	CertainLongLivedAssetsByGeographyTable
894	Other Countries [Member]	nonnum:domainItemType	duration		true	msft	OtherCountriesMember
895	Quarterly Financial Information [Line Items]	xbrli:stringItemType	duration		true	msft	QuarterlyFinancialInformationLineItems
896	Quarterly Financial Information [Table]	xbrli:stringItemType	duration		true	msft	QuarterlyFinancialInformationTable
897	Sales And Marketing Restructuring Plan [Member]	nonnum:domainItemType	duration		true	msft	SalesAndMarketingRestructuringPlanMember
898	Impairment Integration And Restructuring Effect On Operating Income Loss After Tax	xbrli:monetaryItemType	duration	credit	false	msft	ImpairmentIntegrationAndRestructuringEffectOnOperatingIncomeLossAfterTax
899	Impairment Integration And Restructuring Effect On Earnings After Tax	xbrli:monetaryItemType	duration	credit	false	msft	ImpairmentIntegrationAndRestructuringEffectOnEarningsAfterTax
900	Impairment Integration And Restructuring Effect On Earnings Per Share After Tax	num:perShareItemType	duration		false	msft	ImpairmentIntegrationAndRestructuringEffectOnEarningsPerShareAfterTax

Model Structures

Model Structure
Network	100000 - Document - Document and Entity Information (http://www.microsoft.com/20170630/taxonomy/role/DocumentDocumentAndEntityInformation)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Document And Entity Information [Abstract]	Abstract	duration		msft:DocumentAndEntityInformationAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration		us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration		us-gaap:StatementLineItems
6	dei:DocumentType (terseLabel)	Concept (xbrli:stringItemType)	duration		dei:DocumentType
7	dei:AmendmentFlag (terseLabel)	Concept (Boolean)	duration		dei:AmendmentFlag
8	dei:DocumentPeriodEndDate (terseLabel)	Concept (Date)	duration		dei:DocumentPeriodEndDate
9	dei:DocumentFiscalYearFocus (terseLabel)	Concept (gYear)	duration		dei:DocumentFiscalYearFocus
10	dei:DocumentFiscalPeriodFocus (terseLabel)	Concept (xbrli:tokenItemType)	duration		dei:DocumentFiscalPeriodFocus
11	dei:TradingSymbol (terseLabel)	Concept (String-Normalized)	duration		dei:TradingSymbol
12	dei:EntityRegistrantName (terseLabel)	Concept (String-Normalized)	duration		dei:EntityRegistrantName
13	dei:EntityCentralIndexKey (terseLabel)	Concept (xbrli:tokenItemType)	duration		dei:EntityCentralIndexKey
14	dei:CurrentFiscalYearEndDate (terseLabel)	Concept (gMonthDay)	duration		dei:CurrentFiscalYearEndDate
15	dei:EntityWellKnownSeasonedIssuer (terseLabel)	Concept (xbrli:tokenItemType)	duration		dei:EntityWellKnownSeasonedIssuer
16	dei:EntityCurrentReportingStatus (terseLabel)	Concept (xbrli:tokenItemType)	duration		dei:EntityCurrentReportingStatus
17	dei:EntityVoluntaryFilers (terseLabel)	Concept (xbrli:tokenItemType)	duration		dei:EntityVoluntaryFilers
18	dei:EntityFilerCategory (terseLabel)	Concept (xbrli:stringItemType)	duration		dei:EntityFilerCategory
19	dei:EntityListingParValuePerShare (terseLabel)	Concept (Per-Share)	duration		dei:EntityListingParValuePerShare
20	dei:EntityCommonStockSharesOutstanding (terseLabel)	Concept (Shares)	instant		dei:EntityCommonStockSharesOutstanding
21	dei:EntityPublicFloat (terseLabel)	Concept (Monetary)	instant	credit	dei:EntityPublicFloat
22	dei:EntityTaxIdentificationNumber (terseLabel)	Concept (xbrli:tokenItemType)	duration		dei:EntityTaxIdentificationNumber

Model Structure
Network	100010 - Statement - INCOME STATEMENTS (http://www.microsoft.com/20170630/taxonomy/role/StatementINCOMESTATEMENTS)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	us-gaap:IncomeStatementAbstract (label)	Abstract	duration		us-gaap:IncomeStatementAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration		us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration		us-gaap:StatementLineItems
6	us-gaap:SalesRevenueNetAbstract (terseLabel)	Abstract	duration		us-gaap:SalesRevenueNetAbstract
7	us-gaap:SalesRevenueGoodsNet (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:SalesRevenueGoodsNet
8	msft:SalesRevenueServicesAndOtherNet (terseLabel)	Concept (Monetary)	duration	credit	msft:SalesRevenueServicesAndOtherNet
9	us-gaap:SalesRevenueNet (totalLabel)	Concept (Monetary)	duration	credit	us-gaap:SalesRevenueNet
10	us-gaap:CostOfRevenueAbstract (terseLabel)	Abstract	duration		us-gaap:CostOfRevenueAbstract
11	us-gaap:CostOfGoodsSold (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:CostOfGoodsSold
12	msft:CostOfServicesAndOther (terseLabel)	Concept (Monetary)	duration	debit	msft:CostOfServicesAndOther
13	us-gaap:CostOfRevenue (totalLabel)	Concept (Monetary)	duration	debit	us-gaap:CostOfRevenue
14	us-gaap:GrossProfit (totalLabel)	Concept (Monetary)	duration	credit	us-gaap:GrossProfit
15	us-gaap:ResearchAndDevelopmentExpense (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:ResearchAndDevelopmentExpense
16	us-gaap:SellingAndMarketingExpense (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:SellingAndMarketingExpense
17	us-gaap:GeneralAndAdministrativeExpense (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:GeneralAndAdministrativeExpense
18	msft:ImpairmentIntegrationAndRestructuringExpenses (terseLabel)	Concept (Monetary)	duration	debit	msft:ImpairmentIntegrationAndRestructuringExpenses
19	us-gaap:OperatingIncomeLoss (totalLabel)	Concept (Monetary)	duration	credit	us-gaap:OperatingIncomeLoss
20	us-gaap:NonoperatingIncomeExpense (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:NonoperatingIncomeExpense
21	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments (totalLabel)	Concept (Monetary)	duration	credit	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
22	us-gaap:IncomeTaxExpenseBenefit (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:IncomeTaxExpenseBenefit
23	us-gaap:NetIncomeLoss (totalLabel)	Concept (Monetary)	duration	credit	us-gaap:NetIncomeLoss
24	us-gaap:EarningsPerShareAbstract (terseLabel)	Abstract	duration		us-gaap:EarningsPerShareAbstract
25	us-gaap:EarningsPerShareBasic (terseLabel)	Concept (Per-Share)	duration		us-gaap:EarningsPerShareBasic
26	us-gaap:EarningsPerShareDiluted (terseLabel)	Concept (Per-Share)	duration		us-gaap:EarningsPerShareDiluted
27	us-gaap:WeightedAverageNumberOfSharesOutstandingAbstract (terseLabel)	Abstract	duration		us-gaap:WeightedAverageNumberOfSharesOutstandingAbstract
28	us-gaap:WeightedAverageNumberOfSharesOutstandingBasic (terseLabel)	Concept (Shares)	duration		us-gaap:WeightedAverageNumberOfSharesOutstandingBasic
29	us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding (terseLabel)	Concept (Shares)	duration		us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding
30	us-gaap:CommonStockDividendsPerShareDeclared (terseLabel)	Concept (Per-Share)	duration		us-gaap:CommonStockDividendsPerShareDeclared

Model Structure
Network	100020 - Statement - COMPREHENSIVE INCOME STATEMENTS (http://www.microsoft.com/20170630/taxonomy/role/StatementCOMPREHENSIVEINCOMESTATEMENTS)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Statement Of Income And Comprehensive Income [Abstract]	Abstract	duration		us-gaap:StatementOfIncomeAndComprehensiveIncomeAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration		us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration		us-gaap:StatementLineItems
6	us-gaap:NetIncomeLoss (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:NetIncomeLoss
7	us-gaap:OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract (terseLabel)	Abstract	duration		us-gaap:OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract
8	us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax
9	us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
10	us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
11	us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (totalLabel)	Concept (Monetary)	duration	credit	us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
12	us-gaap:ComprehensiveIncomeNetOfTax (totalLabel)	Concept (Monetary)	duration	credit	us-gaap:ComprehensiveIncomeNetOfTax

Model Structure
Network	100030 - Statement - COMPREHENSIVE INCOME STATEMENTS (Parenthetical) (http://www.microsoft.com/20170630/taxonomy/role/StatementCOMPREHENSIVEINCOMESTATEMENTSParenthetical)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Statement Of Income And Comprehensive Income [Abstract]	Abstract	duration		us-gaap:StatementOfIncomeAndComprehensiveIncomeAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration		us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration		us-gaap:StatementLineItems
6	us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax
7	us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax
8	us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax

Model Structure
Network	100040 - Statement - BALANCE SHEETS (http://www.microsoft.com/20170630/taxonomy/role/StatementBALANCESHEETS)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	us-gaap:StatementOfFinancialPositionAbstract (label)	Abstract	duration		us-gaap:StatementOfFinancialPositionAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration		us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration		us-gaap:StatementLineItems
6	us-gaap:AssetsAbstract (terseLabel)	Abstract	duration		us-gaap:AssetsAbstract
7	us-gaap:AssetsCurrentAbstract (terseLabel)	Abstract	duration		us-gaap:AssetsCurrentAbstract
8	us-gaap:CashAndCashEquivalentsAtCarryingValue (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:CashAndCashEquivalentsAtCarryingValue
9	us-gaap:AvailableForSaleSecuritiesCurrent (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:AvailableForSaleSecuritiesCurrent
10	us-gaap:CashCashEquivalentsAndShortTermInvestments (totalLabel)	Concept (Monetary)	instant	debit	us-gaap:CashCashEquivalentsAndShortTermInvestments
11	us-gaap:AccountsReceivableNetCurrent (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:AccountsReceivableNetCurrent
12	us-gaap:InventoryNet (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:InventoryNet
13	us-gaap:OtherAssetsCurrent (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:OtherAssetsCurrent
14	us-gaap:AssetsCurrent (totalLabel)	Concept (Monetary)	instant	debit	us-gaap:AssetsCurrent
15	us-gaap:PropertyPlantAndEquipmentNet (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:PropertyPlantAndEquipmentNet
16	us-gaap:LongTermInvestments (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:LongTermInvestments
17	us-gaap:Goodwill (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:Goodwill
18	us-gaap:FiniteLivedIntangibleAssetsNet (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:FiniteLivedIntangibleAssetsNet
19	us-gaap:OtherAssetsNoncurrent (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:OtherAssetsNoncurrent
20	us-gaap:Assets (totalLabel)	Concept (Monetary)	instant	debit	us-gaap:Assets
21	us-gaap:LiabilitiesAndStockholdersEquityAbstract (terseLabel)	Abstract	duration		us-gaap:LiabilitiesAndStockholdersEquityAbstract
22	us-gaap:LiabilitiesCurrentAbstract (terseLabel)	Abstract	duration		us-gaap:LiabilitiesCurrentAbstract
23	us-gaap:AccountsPayableCurrent (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:AccountsPayableCurrent
24	us-gaap:ShortTermBorrowings (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:ShortTermBorrowings
25	us-gaap:LongTermDebtCurrent (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:LongTermDebtCurrent
26	us-gaap:EmployeeRelatedLiabilitiesCurrent (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:EmployeeRelatedLiabilitiesCurrent
27	us-gaap:AccruedIncomeTaxesCurrent (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:AccruedIncomeTaxesCurrent
28	us-gaap:DeferredRevenueCurrent (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:DeferredRevenueCurrent
29	us-gaap:DepositsReceivedForSecuritiesLoanedAtCarryingValue (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:DepositsReceivedForSecuritiesLoanedAtCarryingValue
30	us-gaap:OtherLiabilitiesCurrent (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:OtherLiabilitiesCurrent
31	us-gaap:LiabilitiesCurrent (totalLabel)	Concept (Monetary)	instant	credit	us-gaap:LiabilitiesCurrent
32	us-gaap:LongTermDebtNoncurrent (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:LongTermDebtNoncurrent
33	us-gaap:DeferredRevenueNoncurrent (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:DeferredRevenueNoncurrent
34	us-gaap:DeferredTaxLiabilitiesNoncurrent (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:DeferredTaxLiabilitiesNoncurrent
35	us-gaap:OtherLiabilitiesNoncurrent (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:OtherLiabilitiesNoncurrent
36	us-gaap:Liabilities (totalLabel)	Concept (Monetary)	instant	credit	us-gaap:Liabilities
37	us-gaap:CommitmentsAndContingencies (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:CommitmentsAndContingencies
38	us-gaap:StockholdersEquityAbstract (terseLabel)	Abstract	duration		us-gaap:StockholdersEquityAbstract
39	us-gaap:CommonStocksIncludingAdditionalPaidInCapital (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:CommonStocksIncludingAdditionalPaidInCapital
40	us-gaap:RetainedEarningsAccumulatedDeficit (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:RetainedEarningsAccumulatedDeficit
41	us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
42	us-gaap:StockholdersEquity (totalLabel)	Concept (Monetary)	instant	credit	us-gaap:StockholdersEquity
43	us-gaap:LiabilitiesAndStockholdersEquity (totalLabel)	Concept (Monetary)	instant	credit	us-gaap:LiabilitiesAndStockholdersEquity

Model Structure
Network	100050 - Statement - BALANCE SHEETS (Parenthetical) (http://www.microsoft.com/20170630/taxonomy/role/StatementBALANCESHEETSParenthetical)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	us-gaap:StatementOfFinancialPositionAbstract (label)	Abstract	duration		us-gaap:StatementOfFinancialPositionAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration		us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration		us-gaap:StatementLineItems
6	us-gaap:SecuritiesLoaned (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:SecuritiesLoaned
7	us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent
8	us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
9	us-gaap:CommonStockSharesAuthorized (terseLabel)	Concept (Shares)	instant		us-gaap:CommonStockSharesAuthorized
10	us-gaap:CommonStockSharesOutstanding (terseLabel)	Concept (Shares)	instant		us-gaap:CommonStockSharesOutstanding

Model Structure
Network	100060 - Statement - CASH FLOWS STATEMENTS (http://www.microsoft.com/20170630/taxonomy/role/StatementCASHFLOWSSTATEMENTS)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Statement Of Cash Flows [Abstract]	Abstract	duration		us-gaap:StatementOfCashFlowsAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration		us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration		us-gaap:StatementLineItems
6	us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract (terseLabel)	Abstract	duration		us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract
7	us-gaap:NetIncomeLoss (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:NetIncomeLoss
8	us-gaap:AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract (terseLabel)	Abstract	duration		us-gaap:AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract
9	us-gaap:AssetImpairmentCharges (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:AssetImpairmentCharges
10	msft:DepreciationAmortizationAndOther (terseLabel)	Concept (Monetary)	duration	debit	msft:DepreciationAmortizationAndOther
11	us-gaap:ShareBasedCompensation (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:ShareBasedCompensation
12	msft:GainLossOnInvestmentsAndDerivativeInstruments (negatedLabel)	Concept (Monetary)	duration	credit	msft:GainLossOnInvestmentsAndDerivativeInstruments
13	us-gaap:DeferredIncomeTaxExpenseBenefit (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:DeferredIncomeTaxExpenseBenefit
14	us-gaap:IncreaseDecreaseInDeferredRevenue (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:IncreaseDecreaseInDeferredRevenue
15	us-gaap:RecognitionOfDeferredRevenue (negatedLabel)	Concept (Monetary)	duration	credit	us-gaap:RecognitionOfDeferredRevenue
16	us-gaap:IncreaseDecreaseInOperatingCapitalAbstract (terseLabel)	Abstract	duration		us-gaap:IncreaseDecreaseInOperatingCapitalAbstract
17	us-gaap:IncreaseDecreaseInAccountsReceivable (negatedLabel)	Concept (Monetary)	duration	credit	us-gaap:IncreaseDecreaseInAccountsReceivable
18	us-gaap:IncreaseDecreaseInInventories (negatedLabel)	Concept (Monetary)	duration	credit	us-gaap:IncreaseDecreaseInInventories
19	us-gaap:IncreaseDecreaseInOtherCurrentAssets (negatedLabel)	Concept (Monetary)	duration	credit	us-gaap:IncreaseDecreaseInOtherCurrentAssets
20	us-gaap:IncreaseDecreaseInOtherNoncurrentAssets (negatedLabel)	Concept (Monetary)	duration	credit	us-gaap:IncreaseDecreaseInOtherNoncurrentAssets
21	us-gaap:IncreaseDecreaseInAccountsPayable (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:IncreaseDecreaseInAccountsPayable
22	us-gaap:IncreaseDecreaseInOtherCurrentLiabilities (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:IncreaseDecreaseInOtherCurrentLiabilities
23	us-gaap:IncreaseDecreaseInOtherNoncurrentLiabilities (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:IncreaseDecreaseInOtherNoncurrentLiabilities
24	us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinuingOperations (totalLabel)	Concept (Monetary)	duration		us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
25	us-gaap:NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract (terseLabel)	Abstract	duration		us-gaap:NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract
26	us-gaap:ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess
27	us-gaap:ProceedsFromDebtMaturingInMoreThanThreeMonths (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:ProceedsFromDebtMaturingInMoreThanThreeMonths
28	us-gaap:RepaymentsOfDebtMaturingInMoreThanThreeMonths (negatedLabel)	Concept (Monetary)	duration	credit	us-gaap:RepaymentsOfDebtMaturingInMoreThanThreeMonths
29	us-gaap:ProceedsFromIssuanceOfCommonStock (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:ProceedsFromIssuanceOfCommonStock
30	us-gaap:PaymentsForRepurchaseOfCommonStock (negatedLabel)	Concept (Monetary)	duration	credit	us-gaap:PaymentsForRepurchaseOfCommonStock
31	us-gaap:PaymentsOfDividendsCommonStock (negatedLabel)	Concept (Monetary)	duration	credit	us-gaap:PaymentsOfDividendsCommonStock
32	us-gaap:ProceedsFromPaymentsForOtherFinancingActivities (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:ProceedsFromPaymentsForOtherFinancingActivities
33	us-gaap:NetCashProvidedByUsedInFinancingActivitiesContinuingOperations (totalLabel)	Concept (Monetary)	duration	debit	us-gaap:NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
34	us-gaap:NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract (terseLabel)	Abstract	duration		us-gaap:NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract
35	us-gaap:PaymentsToAcquirePropertyPlantAndEquipment (negatedLabel)	Concept (Monetary)	duration	credit	us-gaap:PaymentsToAcquirePropertyPlantAndEquipment
36	msft:AcquisitionsNetOfCashAcquiredAndPurchasesOfIntangibleAndOtherAssets (negatedLabel)	Concept (Monetary)	duration	credit	msft:AcquisitionsNetOfCashAcquiredAndPurchasesOfIntangibleAndOtherAssets
37	us-gaap:PaymentsToAcquireInvestments (negatedLabel)	Concept (Monetary)	duration	credit	us-gaap:PaymentsToAcquireInvestments
38	us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities
39	us-gaap:ProceedsFromSaleOfAvailableForSaleSecurities (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:ProceedsFromSaleOfAvailableForSaleSecurities
40	us-gaap:IncreaseDecreaseInCollateralHeldUnderSecuritiesLending (negatedLabel)	Concept (Monetary)	duration	credit	us-gaap:IncreaseDecreaseInCollateralHeldUnderSecuritiesLending
41	us-gaap:NetCashProvidedByUsedInInvestingActivitiesContinuingOperations (totalLabel)	Concept (Monetary)	duration	debit	us-gaap:NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
42	us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents
43	us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease (totalLabel)	Concept (Monetary)	duration	debit	us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease
44	us-gaap:CashAndCashEquivalentsAtCarryingValue (periodStartLabel)	Concept (Monetary)	instant	debit	us-gaap:CashAndCashEquivalentsAtCarryingValue
45	Cash and cash equivalents, end of period	Concept (Monetary)	instant	debit	us-gaap:CashAndCashEquivalentsAtCarryingValue

Model Structure
Network	100070 - Statement - STOCKHOLDERS' EQUITY STATEMENTS (http://www.microsoft.com/20170630/taxonomy/role/StatementSTOCKHOLDERSEQUITYSTATEMENTS)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Statement Of Stockholders Equity [Abstract]	Abstract	duration		us-gaap:StatementOfStockholdersEquityAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration		us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:StatementEquityComponentsAxis (terseLabel)	Axis	duration		us-gaap:StatementEquityComponentsAxis
6	us-gaap:EquityComponentDomain (terseLabel)	Member	duration		us-gaap:EquityComponentDomain
7	us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember (terseLabel)	Member	duration		us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember
8	us-gaap:RetainedEarningsMember (terseLabel)	Member	duration		us-gaap:RetainedEarningsMember
9	us-gaap:AccumulatedOtherComprehensiveIncomeMember (terseLabel)	Member	duration		us-gaap:AccumulatedOtherComprehensiveIncomeMember
10	us-gaap:StatementLineItems (terseLabel)	LineItems	duration		us-gaap:StatementLineItems
11	us-gaap:StockholdersEquity (periodStartLabel)	Concept (Monetary)	instant	credit	us-gaap:StockholdersEquity
12	us-gaap:StockIssuedDuringPeriodValueNewIssues (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:StockIssuedDuringPeriodValueNewIssues
13	us-gaap:NetIncomeLoss (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:NetIncomeLoss
14	us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (verboseLabel)	Concept (Monetary)	duration	credit	us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
15	us-gaap:DividendsCommonStockCash (negatedLabel)	Concept (Monetary)	duration	debit	us-gaap:DividendsCommonStockCash
16	us-gaap:StockRepurchasedDuringPeriodValue (negatedLabel)	Concept (Monetary)	duration	debit	us-gaap:StockRepurchasedDuringPeriodValue
17	us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
18	us-gaap:AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet
19	us-gaap:StockholdersEquityOther (negatedLabel)	Concept (Monetary)	duration	debit	us-gaap:StockholdersEquityOther
20	us-gaap:StockholdersEquity (periodEndLabel)	Concept (Monetary)	instant	credit	us-gaap:StockholdersEquity

Model Structure
Network	100080 - Disclosure - ACCOUNTING POLICIES (http://www.microsoft.com/20170630/taxonomy/role/DisclosureACCOUNTINGPOLICIES)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Accounting Policies [Abstract]	Abstract	duration	us-gaap:AccountingPoliciesAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:SignificantAccountingPoliciesTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:SignificantAccountingPoliciesTextBlock

Model Structure
Network	100090 - Disclosure - EARNINGS PER SHARE (http://www.microsoft.com/20170630/taxonomy/role/DisclosureEARNINGSPERSHARE)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	us-gaap:EarningsPerShareAbstract (label)	Abstract	duration	us-gaap:EarningsPerShareAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:EarningsPerShareTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:EarningsPerShareTextBlock

Model Structure
Network	100100 - Disclosure - OTHER INCOME (EXPENSE), NET (http://www.microsoft.com/20170630/taxonomy/role/DisclosureOTHERINCOMEEXPENSENET)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Other Income And Expenses [Abstract]	Abstract	duration	us-gaap:OtherIncomeAndExpensesAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:OtherNonoperatingIncomeAndExpenseTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:OtherNonoperatingIncomeAndExpenseTextBlock

Model Structure
Network	100110 - Disclosure - INVESTMENTS (http://www.microsoft.com/20170630/taxonomy/role/DisclosureINVESTMENTS)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Cash And Cash Equivalents [Abstract]	Abstract	duration	us-gaap:CashAndCashEquivalentsAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:InvestmentsInDebtAndEquityInstrumentsCashAndCashEquivalentsUnrealizedAndRealizedGainsLossesTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:InvestmentsInDebtAndEquityInstrumentsCashAndCashEquivalentsUnrealizedAndRealizedGainsLossesTextBlock

Model Structure
Network	100120 - Disclosure - DERIVATIVES (http://www.microsoft.com/20170630/taxonomy/role/DisclosureDERIVATIVES)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Derivative Instruments And Hedging Activities Disclosure [Abstract]	Abstract	duration	us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock

Model Structure
Network	100130 - Disclosure - FAIR VALUE MEASUREMENTS (http://www.microsoft.com/20170630/taxonomy/role/DisclosureFAIRVALUEMEASUREMENTS)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Fair Value Disclosures [Abstract]	Abstract	duration	us-gaap:FairValueDisclosuresAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:FairValueDisclosuresTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:FairValueDisclosuresTextBlock

Model Structure
Network	100140 - Disclosure - INVENTORIES (http://www.microsoft.com/20170630/taxonomy/role/DisclosureINVENTORIES)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Inventory Disclosure [Abstract]	Abstract	duration	us-gaap:InventoryDisclosureAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:InventoryDisclosureTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:InventoryDisclosureTextBlock

Model Structure
Network	100150 - Disclosure - PROPERTY AND EQUIPMENT (http://www.microsoft.com/20170630/taxonomy/role/DisclosurePROPERTYANDEQUIPMENT)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Property Plant And Equipment [Abstract]	Abstract	duration	us-gaap:PropertyPlantAndEquipmentAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock

Model Structure
Network	100160 - Disclosure - BUSINESS COMBINATIONS (http://www.microsoft.com/20170630/taxonomy/role/DisclosureBUSINESSCOMBINATIONS)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Business Combinations [Abstract]	Abstract	duration	us-gaap:BusinessCombinationsAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:MergersAcquisitionsAndDispositionsDisclosuresTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:MergersAcquisitionsAndDispositionsDisclosuresTextBlock

Model Structure
Network	100170 - Disclosure - GOODWILL (http://www.microsoft.com/20170630/taxonomy/role/DisclosureGOODWILL)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Goodwill And Intangible Assets Disclosure [Abstract]	Abstract	duration	us-gaap:GoodwillAndIntangibleAssetsDisclosureAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:GoodwillDisclosureTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:GoodwillDisclosureTextBlock

Model Structure
Network	100180 - Disclosure - INTANGIBLE ASSETS (http://www.microsoft.com/20170630/taxonomy/role/DisclosureINTANGIBLEASSETS)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Goodwill And Intangible Assets Disclosure [Abstract]	Abstract	duration	us-gaap:GoodwillAndIntangibleAssetsDisclosureAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:IntangibleAssetsDisclosureTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:IntangibleAssetsDisclosureTextBlock

Model Structure
Network	100190 - Disclosure - DEBT (http://www.microsoft.com/20170630/taxonomy/role/DisclosureDEBT)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Debt Disclosure [Abstract]	Abstract	duration	us-gaap:DebtDisclosureAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:DebtDisclosureTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:DebtDisclosureTextBlock

Model Structure
Network	100200 - Disclosure - INCOME TAXES (http://www.microsoft.com/20170630/taxonomy/role/DisclosureINCOMETAXES)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Income Tax Disclosure [Abstract]	Abstract	duration	us-gaap:IncomeTaxDisclosureAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:IncomeTaxDisclosureTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:IncomeTaxDisclosureTextBlock

Model Structure
Network	100210 - Disclosure - RESTRUCTURING CHARGES (http://www.microsoft.com/20170630/taxonomy/role/DisclosureRESTRUCTURINGCHARGES)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Restructuring And Related Activities [Abstract]	Abstract	duration	us-gaap:RestructuringAndRelatedActivitiesAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:RestructuringAndRelatedActivitiesDisclosureTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:RestructuringAndRelatedActivitiesDisclosureTextBlock

Model Structure
Network	100220 - Disclosure - UNEARNED REVENUE (http://www.microsoft.com/20170630/taxonomy/role/DisclosureUNEARNEDREVENUE)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Deferred Revenue Disclosure [Abstract]	Abstract	duration	us-gaap:DeferredRevenueDisclosureAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:DeferredRevenueDisclosureTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:DeferredRevenueDisclosureTextBlock

Model Structure
Network	100230 - Disclosure - COMMITMENTS (http://www.microsoft.com/20170630/taxonomy/role/DisclosureCOMMITMENTS)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Commitments And Contingencies Disclosure [Abstract]	Abstract	duration	us-gaap:CommitmentsAndContingenciesDisclosureAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:CommitmentsDisclosureTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:CommitmentsDisclosureTextBlock

Model Structure
Network	100240 - Disclosure - CONTINGENCIES (http://www.microsoft.com/20170630/taxonomy/role/DisclosureCONTINGENCIES)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Commitments And Contingencies Disclosure [Abstract]	Abstract	duration	us-gaap:CommitmentsAndContingenciesDisclosureAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:LegalMattersAndContingenciesTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:LegalMattersAndContingenciesTextBlock

Model Structure
Network	100250 - Disclosure - STOCKHOLDERS' EQUITY (http://www.microsoft.com/20170630/taxonomy/role/DisclosureSTOCKHOLDERSEQUITY)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Equity [Abstract]	Abstract	duration	us-gaap:EquityAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:StockholdersEquityNoteDisclosureTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:StockholdersEquityNoteDisclosureTextBlock

Model Structure
Network	100260 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME (http://www.microsoft.com/20170630/taxonomy/role/DisclosureACCUMULATEDOTHERCOMPREHENSIVEINCOME)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Equity [Abstract]	Abstract	duration	us-gaap:EquityAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:ComprehensiveIncomeNoteTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ComprehensiveIncomeNoteTextBlock

Model Structure
Network	100270 - Disclosure - EMPLOYEE STOCK AND SAVINGS PLANS (http://www.microsoft.com/20170630/taxonomy/role/DisclosureEMPLOYEESTOCKANDSAVINGSPLANS)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Postemployment Benefits [Abstract]	Abstract	duration	us-gaap:PostemploymentBenefitsAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:CompensationAndEmployeeBenefitPlansTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:CompensationAndEmployeeBenefitPlansTextBlock

Model Structure
Network	100280 - Disclosure - SEGMENT INFORMATION AND GEOGRAPHIC DATA (http://www.microsoft.com/20170630/taxonomy/role/DisclosureSEGMENTINFORMATIONANDGEOGRAPHICDATA)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Segment Reporting [Abstract]	Abstract	duration	us-gaap:SegmentReportingAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:SegmentReportingDisclosureTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:SegmentReportingDisclosureTextBlock

Model Structure
Network	100290 - Disclosure - QUARTERLY INFORMATION (UNAUDITED) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureQUARTERLYINFORMATIONUNAUDITED)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Quarterly Financial Information Disclosure [Abstract]	Abstract	duration	us-gaap:QuarterlyFinancialInformationDisclosureAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:QuarterlyFinancialInformationTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:QuarterlyFinancialInformationTextBlock

Model Structure
Network	100300 - Disclosure - ACCOUNTING POLICIES (Policies) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureACCOUNTINGPOLICIESPolicies)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Accounting Policies [Abstract]	Abstract	duration	us-gaap:AccountingPoliciesAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:BasisOfAccountingPolicyPolicyTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:BasisOfAccountingPolicyPolicyTextBlock
7	us-gaap:ConsolidationPolicyTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ConsolidationPolicyTextBlock
8	us-gaap:UseOfEstimates (terseLabel)	Concept (TextBlock)	duration	us-gaap:UseOfEstimates
9	us-gaap:ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock
10	msft:ProductRevenueAndServiceAndOtherRevenuePolicyTextBlock (terseLabel)	Concept (TextBlock)	duration	msft:ProductRevenueAndServiceAndOtherRevenuePolicyTextBlock
11	us-gaap:RevenueRecognitionPolicyTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:RevenueRecognitionPolicyTextBlock
12	us-gaap:CostOfSalesPolicyTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:CostOfSalesPolicyTextBlock
13	us-gaap:StandardProductWarrantyPolicy (terseLabel)	Concept (TextBlock)	duration	us-gaap:StandardProductWarrantyPolicy
14	us-gaap:ResearchDevelopmentAndComputerSoftwarePolicyTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ResearchDevelopmentAndComputerSoftwarePolicyTextBlock
15	msft:SellingAndMarketingPolicyTextBlock (terseLabel)	Concept (TextBlock)	duration	msft:SellingAndMarketingPolicyTextBlock
16	us-gaap:ShareBasedCompensationOptionAndIncentivePlansPolicy (terseLabel)	Concept (TextBlock)	duration	us-gaap:ShareBasedCompensationOptionAndIncentivePlansPolicy
17	us-gaap:IncomeTaxPolicyTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:IncomeTaxPolicyTextBlock
18	us-gaap:FairValueOfFinancialInstrumentsPolicy (terseLabel)	Concept (TextBlock)	duration	us-gaap:FairValueOfFinancialInstrumentsPolicy
19	us-gaap:InvestmentPolicyTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:InvestmentPolicyTextBlock
20	us-gaap:DerivativesPolicyTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:DerivativesPolicyTextBlock
21	us-gaap:TradeAndOtherAccountsReceivablePolicy (terseLabel)	Concept (TextBlock)	duration	us-gaap:TradeAndOtherAccountsReceivablePolicy
22	us-gaap:InventoryPolicyTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:InventoryPolicyTextBlock
23	us-gaap:PropertyPlantAndEquipmentPolicyTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:PropertyPlantAndEquipmentPolicyTextBlock
24	us-gaap:GoodwillAndIntangibleAssetsGoodwillPolicy (terseLabel)	Concept (TextBlock)	duration	us-gaap:GoodwillAndIntangibleAssetsGoodwillPolicy
25	us-gaap:IntangibleAssetsFiniteLivedPolicy (terseLabel)	Concept (TextBlock)	duration	us-gaap:IntangibleAssetsFiniteLivedPolicy
26	us-gaap:NewAccountingPronouncementsPolicyPolicyTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:NewAccountingPronouncementsPolicyPolicyTextBlock
27	us-gaap:EarningsPerSharePolicyTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:EarningsPerSharePolicyTextBlock
28	us-gaap:SegmentReportingPolicyPolicyTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:SegmentReportingPolicyPolicyTextBlock

Model Structure
Network	100310 - Disclosure - ACCOUNTING POLICIES (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureACCOUNTINGPOLICIESTables)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Accounting Policies [Abstract]	Abstract	duration	us-gaap:AccountingPoliciesAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:ScheduleOfCreditLossesForFinancingReceivablesCurrentTableTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfCreditLossesForFinancingReceivablesCurrentTableTextBlock
7	us-gaap:ScheduleOfNewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfNewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock

Model Structure
Network	100320 - Disclosure - EARNINGS PER SHARE (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureEARNINGSPERSHARETables)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	us-gaap:EarningsPerShareAbstract (label)	Abstract	duration	us-gaap:EarningsPerShareAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock

Model Structure
Network	100330 - Disclosure - OTHER INCOME (EXPENSE), NET (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureOTHERINCOMEEXPENSENETTables)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Other Income And Expenses [Abstract]	Abstract	duration	us-gaap:OtherIncomeAndExpensesAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:ScheduleOfOtherNonoperatingIncomeExpenseTableTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfOtherNonoperatingIncomeExpenseTableTextBlock
7	us-gaap:RealizedGainLossOnInvestmentsTableTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:RealizedGainLossOnInvestmentsTableTextBlock

Model Structure
Network	100340 - Disclosure - INVESTMENTS (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureINVESTMENTSTables)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Cash And Cash Equivalents [Abstract]	Abstract	duration	us-gaap:CashAndCashEquivalentsAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	msft:ScheduleOfCashCashEquivalentsAndInvestmentsTableTextBlock (terseLabel)	Concept (TextBlock)	duration	msft:ScheduleOfCashCashEquivalentsAndInvestmentsTableTextBlock
7	us-gaap:ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock
8	us-gaap:InvestmentsClassifiedByContractualMaturityDateTableTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:InvestmentsClassifiedByContractualMaturityDateTableTextBlock

Model Structure
Network	100350 - Disclosure - DERIVATIVES (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureDERIVATIVESTables)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Derivative Instruments And Hedging Activities Disclosure [Abstract]	Abstract	duration	us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:DerivativeInstrumentsGainLossByHedgingRelationshipAxis (terseLabel)	Axis	duration	us-gaap:DerivativeInstrumentsGainLossByHedgingRelationshipAxis
6	us-gaap:HedgingRelationshipDomain (terseLabel)	Member	duration	us-gaap:HedgingRelationshipDomain
7	us-gaap:FairValueHedgingMember (terseLabel)	Member	duration	us-gaap:FairValueHedgingMember
8	us-gaap:CashFlowHedgingMember (terseLabel)	Member	duration	us-gaap:CashFlowHedgingMember
9	us-gaap:HedgingDesignationAxis (terseLabel)	Axis	duration	us-gaap:HedgingDesignationAxis
10	us-gaap:HedgingDesignationDomain (terseLabel)	Member	duration	us-gaap:HedgingDesignationDomain
11	us-gaap:NondesignatedMember (terseLabel)	Member	duration	us-gaap:NondesignatedMember
12	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
13	us-gaap:ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock
14	us-gaap:ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock

Model Structure
Network	100360 - Disclosure - FAIR VALUE MEASUREMENTS (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureFAIRVALUEMEASUREMENTSTables)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Fair Value Disclosures [Abstract]	Abstract	duration	us-gaap:FairValueDisclosuresAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock
7	msft:ReconciliationOfAssetsMeasuredAtFairValueOnRecurringBasisToBalanceSheetPresentationTableTextBlock (terseLabel)	Concept (TextBlock)	duration	msft:ReconciliationOfAssetsMeasuredAtFairValueOnRecurringBasisToBalanceSheetPresentationTableTextBlock

Model Structure
Network	100370 - Disclosure - INVENTORIES (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureINVENTORIESTables)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Inventory Disclosure [Abstract]	Abstract	duration	us-gaap:InventoryDisclosureAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:ScheduleOfInventoryCurrentTableTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfInventoryCurrentTableTextBlock

Model Structure
Network	100380 - Disclosure - PROPERTY AND EQUIPMENT (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosurePROPERTYANDEQUIPMENTTables)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Property Plant And Equipment [Abstract]	Abstract	duration	us-gaap:PropertyPlantAndEquipmentAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:PropertyPlantAndEquipmentTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:PropertyPlantAndEquipmentTextBlock

Model Structure
Network	100390 - Disclosure - BUSINESS COMBINATIONS (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureBUSINESSCOMBINATIONSTables)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Business Combinations [Abstract]	Abstract	duration	us-gaap:BusinessCombinationsAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:BusinessAcquisitionAxis (terseLabel)	Axis	duration	us-gaap:BusinessAcquisitionAxis
6	us-gaap:BusinessAcquisitionAcquireeDomain (terseLabel)	Member	duration	us-gaap:BusinessAcquisitionAcquireeDomain
7	msft:LinkedInCorporationMember (terseLabel)	Member	duration	msft:LinkedInCorporationMember
8	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
9	us-gaap:ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock
10	us-gaap:ScheduleOfAcquiredFiniteLivedIntangibleAssetsByMajorClassTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfAcquiredFiniteLivedIntangibleAssetsByMajorClassTextBlock
11	msft:RevenueAndOperatingLossAttributableToAcquireeSinceAcquisitionDateTableTextBlock (terseLabel)	Concept (TextBlock)	duration	msft:RevenueAndOperatingLossAttributableToAcquireeSinceAcquisitionDateTableTextBlock
12	us-gaap:BusinessAcquisitionProFormaInformationTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:BusinessAcquisitionProFormaInformationTextBlock

Model Structure
Network	100400 - Disclosure - GOODWILL (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureGOODWILLTables)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Goodwill And Intangible Assets Disclosure [Abstract]	Abstract	duration	us-gaap:GoodwillAndIntangibleAssetsDisclosureAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:ScheduleOfGoodwillTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfGoodwillTextBlock

Model Structure
Network	100410 - Disclosure - INTANGIBLE ASSETS (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureINTANGIBLEASSETSTables)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Goodwill And Intangible Assets Disclosure [Abstract]	Abstract	duration	us-gaap:GoodwillAndIntangibleAssetsDisclosureAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock
7	us-gaap:ScheduleOfAcquiredFiniteLivedIntangibleAssetsByMajorClassTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfAcquiredFiniteLivedIntangibleAssetsByMajorClassTextBlock
8	us-gaap:ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock

Model Structure
Network	100420 - Disclosure - DEBT (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureDEBTTables)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Debt Disclosure [Abstract]	Abstract	duration	us-gaap:DebtDisclosureAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:ScheduleOfDebtInstrumentsTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfDebtInstrumentsTextBlock
7	us-gaap:ScheduleOfMaturitiesOfLongTermDebtTableTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfMaturitiesOfLongTermDebtTableTextBlock

Model Structure
Network	100430 - Disclosure - INCOME TAXES (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureINCOMETAXESTables)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Income Tax Disclosure [Abstract]	Abstract	duration	us-gaap:IncomeTaxDisclosureAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock
7	us-gaap:ScheduleOfIncomeBeforeIncomeTaxDomesticAndForeignTableTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfIncomeBeforeIncomeTaxDomesticAndForeignTableTextBlock
8	us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock
9	us-gaap:ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock
10	us-gaap:SummaryOfIncomeTaxContingenciesTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:SummaryOfIncomeTaxContingenciesTextBlock

Model Structure
Network	100440 - Disclosure - RESTRUCTURING CHARGES (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureRESTRUCTURINGCHARGESTables)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Restructuring And Related Activities [Abstract]	Abstract	duration	us-gaap:RestructuringAndRelatedActivitiesAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:ScheduleOfRestructuringReserveByTypeOfCostTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfRestructuringReserveByTypeOfCostTextBlock

Model Structure
Network	100450 - Disclosure - UNEARNED REVENUE (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureUNEARNEDREVENUETables)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Deferred Revenue Disclosure [Abstract]	Abstract	duration	us-gaap:DeferredRevenueDisclosureAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	msft:DeferredRevenueBySegmentTextBlock (terseLabel)	Concept (TextBlock)	duration	msft:DeferredRevenueBySegmentTextBlock

Model Structure
Network	100460 - Disclosure - COMMITMENTS (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureCOMMITMENTSTables)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Commitments And Contingencies Disclosure [Abstract]	Abstract	duration	us-gaap:CommitmentsAndContingenciesDisclosureAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock
7	us-gaap:ScheduleOfFutureMinimumLeasePaymentsForCapitalLeasesTableTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfFutureMinimumLeasePaymentsForCapitalLeasesTableTextBlock

Model Structure
Network	100470 - Disclosure - STOCKHOLDERS' EQUITY (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureSTOCKHOLDERSEQUITYTables)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Equity [Abstract]	Abstract	duration	us-gaap:EquityAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:ScheduleOfCommonStockOutstandingRollForwardTableTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfCommonStockOutstandingRollForwardTableTextBlock
7	msft:ShareRepurchaseProgramDisclosureTableTextBlock (terseLabel)	Concept (TextBlock)	duration	msft:ShareRepurchaseProgramDisclosureTableTextBlock
8	us-gaap:DividendsDeclaredTableTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:DividendsDeclaredTableTextBlock

Model Structure
Network	100480 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureACCUMULATEDOTHERCOMPREHENSIVEINCOMETables)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Equity [Abstract]	Abstract	duration	us-gaap:EquityAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock

Model Structure
Network	100490 - Disclosure - EMPLOYEE STOCK AND SAVINGS PLANS (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureEMPLOYEESTOCKANDSAVINGSPLANSTables)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Postemployment Benefits [Abstract]	Abstract	duration	us-gaap:PostemploymentBenefitsAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock
7	msft:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMethodUsedTableTextBlock (terseLabel)	Concept (TextBlock)	duration	msft:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMethodUsedTableTextBlock
8	us-gaap:DisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:DisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTextBlock
9	us-gaap:ScheduleOfShareBasedCompensationEmployeeStockPurchasePlanActivityTableTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfShareBasedCompensationEmployeeStockPurchasePlanActivityTableTextBlock

Model Structure
Network	100500 - Disclosure - SEGMENT INFORMATION AND GEOGRAPHIC DATA (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureSEGMENTINFORMATIONANDGEOGRAPHICDATATables)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Segment Reporting [Abstract]	Abstract	duration	us-gaap:SegmentReportingAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:ReconciliationOfRevenueFromSegmentsToConsolidatedTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ReconciliationOfRevenueFromSegmentsToConsolidatedTextBlock
7	us-gaap:ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTextBlock
8	us-gaap:ScheduleOfRevenueFromExternalCustomersAttributedToForeignCountriesByGeographicAreaTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfRevenueFromExternalCustomersAttributedToForeignCountriesByGeographicAreaTextBlock
9	us-gaap:ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock
10	us-gaap:ScheduleOfEntityWideDisclosureOnGeographicAreasLongLivedAssetsInIndividualForeignCountriesByCountryTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfEntityWideDisclosureOnGeographicAreasLongLivedAssetsInIndividualForeignCountriesByCountryTextBlock

Model Structure
Network	100510 - Disclosure - QUARTERLY INFORMATION (UNAUDITED) (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureQUARTERLYINFORMATIONUNAUDITEDTables)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Quarterly Financial Information Disclosure [Abstract]	Abstract	duration	us-gaap:QuarterlyFinancialInformationDisclosureAbstract
2	us-gaap:StatementTable (terseLabel)	Table	duration	us-gaap:StatementTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:StatementLineItems (terseLabel)	LineItems	duration	us-gaap:StatementLineItems
6	us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock (terseLabel)	Concept (TextBlock)	duration	us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock

Model Structure
Network	100520 - Disclosure - Accounting Policies - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureAccountingPoliciesAdditionalInformationDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Accounting Policies [Abstract]	Abstract	duration		us-gaap:AccountingPoliciesAbstract
2	msft:SignificantAccountingPoliciesTable (terseLabel)	Table	duration		msft:SignificantAccountingPoliciesTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:DeferredRevenueArrangementTypeAxis (terseLabel)	Axis	duration		us-gaap:DeferredRevenueArrangementTypeAxis
6	us-gaap:DeferredRevenueArrangementTypeDomain (terseLabel)	Member	duration		us-gaap:DeferredRevenueArrangementTypeDomain
7	msft:WindowsTenDeferralMember (terseLabel)	Member	duration		msft:WindowsTenDeferralMember
8	us-gaap:RangeAxis (terseLabel)	Axis	duration		us-gaap:RangeAxis
9	us-gaap:RangeMember (terseLabel)	Member	duration		us-gaap:RangeMember
10	us-gaap:MinimumMember (terseLabel)	Member	duration		us-gaap:MinimumMember
11	us-gaap:MaximumMember (terseLabel)	Member	duration		us-gaap:MaximumMember
12	us-gaap:PropertyPlantAndEquipmentByTypeAxis (terseLabel)	Axis	duration		us-gaap:PropertyPlantAndEquipmentByTypeAxis
13	us-gaap:PropertyPlantAndEquipmentTypeDomain (terseLabel)	Member	duration		us-gaap:PropertyPlantAndEquipmentTypeDomain
14	us-gaap:SoftwareAndSoftwareDevelopmentCostsMember (terseLabel)	Member	duration		us-gaap:SoftwareAndSoftwareDevelopmentCostsMember
15	us-gaap:ComputerEquipmentMember (terseLabel)	Member	duration		us-gaap:ComputerEquipmentMember
16	us-gaap:BuildingAndBuildingImprovementsMember (terseLabel)	Member	duration		us-gaap:BuildingAndBuildingImprovementsMember
17	us-gaap:LeaseholdImprovementsMember (terseLabel)	Member	duration		us-gaap:LeaseholdImprovementsMember
18	us-gaap:FurnitureAndFixturesMember (terseLabel)	Member	duration		us-gaap:FurnitureAndFixturesMember
19	us-gaap:AdjustmentsForNewAccountingPronouncementsAxis (terseLabel)	Axis	duration		us-gaap:AdjustmentsForNewAccountingPronouncementsAxis
20	us-gaap:TypeOfAdoptionMember (terseLabel)	Member	duration		us-gaap:TypeOfAdoptionMember
21	us-gaap:AccountingStandardsUpdate201602Member (terseLabel)	Member	duration		us-gaap:AccountingStandardsUpdate201602Member
22	us-gaap:AccountingStandardsUpdate201409Member (terseLabel)	Member	duration		us-gaap:AccountingStandardsUpdate201409Member
23	us-gaap:StatementScenarioAxis (terseLabel)	Axis	duration		us-gaap:StatementScenarioAxis
24	us-gaap:ScenarioUnspecifiedDomain (terseLabel)	Member	duration		us-gaap:ScenarioUnspecifiedDomain
25	us-gaap:ScenarioPlanMember (terseLabel)	Member	duration		us-gaap:ScenarioPlanMember
26	msft:SignificantAccountingPoliciesLineItems (terseLabel)	LineItems	duration		msft:SignificantAccountingPoliciesLineItems
27	msft:RevenueRecognitionPeriod (terseLabel)	Concept (Duration)	duration		msft:RevenueRecognitionPeriod
28	us-gaap:AdvertisingExpense (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:AdvertisingExpense
29	us-gaap:PropertyPlantAndEquipmentUsefulLife (terseLabel)	Concept (Duration)	duration		us-gaap:PropertyPlantAndEquipmentUsefulLife
30	us-gaap:FiniteLivedIntangibleAssetUsefulLife (terseLabel)	Concept (Duration)	duration		us-gaap:FiniteLivedIntangibleAssetUsefulLife
31	msft:OperatingLeaseRightOfUseAssets (terseLabel)	Concept (Monetary)	instant	debit	msft:OperatingLeaseRightOfUseAssets
32	msft:OperatingLeaseLiabilities (terseLabel)	Concept (Monetary)	instant	credit	msft:OperatingLeaseLiabilities
33	us-gaap:SalesRevenueNet (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:SalesRevenueNet
34	us-gaap:IncomeTaxExpenseBenefit (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:IncomeTaxExpenseBenefit
35	msft:AccountsReceivableNetAndOtherAssets (terseLabel)	Concept (Monetary)	instant	debit	msft:AccountsReceivableNetAndOtherAssets
36	us-gaap:DeferredRevenue (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:DeferredRevenue
37	us-gaap:DeferredTaxLiabilitiesNoncurrent (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:DeferredTaxLiabilitiesNoncurrent

Model Structure
Network	100530 - Disclosure - Allowance for Doubtful Accounts (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureAllowanceForDoubtfulAccountsDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Organization Consolidation And Presentation Of Financial Statements [Abstract]	Abstract	duration		us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
2	us-gaap:ValuationAndQualifyingAccountsDisclosureTable (terseLabel)	Table	duration		us-gaap:ValuationAndQualifyingAccountsDisclosureTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:ValuationAllowancesAndReservesTypeAxis (terseLabel)	Axis	duration		us-gaap:ValuationAllowancesAndReservesTypeAxis
6	us-gaap:ValuationAllowancesAndReservesDomain (terseLabel)	Member	duration		us-gaap:ValuationAllowancesAndReservesDomain
7	us-gaap:AllowanceForDoubtfulAccountsMember (terseLabel)	Member	duration		us-gaap:AllowanceForDoubtfulAccountsMember
8	us-gaap:ValuationAndQualifyingAccountsDisclosureLineItems (terseLabel)	LineItems	duration		us-gaap:ValuationAndQualifyingAccountsDisclosureLineItems
9	us-gaap:ValuationAllowancesAndReservesBalance (periodStartLabel)	Concept (Monetary)	instant	credit	us-gaap:ValuationAllowancesAndReservesBalance
10	msft:ValuationAllowancesAndReservesChargedToCostsAndOther (terseLabel)	Concept (Monetary)	duration	credit	msft:ValuationAllowancesAndReservesChargedToCostsAndOther
11	us-gaap:ValuationAllowancesAndReservesDeductions (negatedLabel)	Concept (Monetary)	duration	debit	us-gaap:ValuationAllowancesAndReservesDeductions
12	Balance, end of period	Concept (Monetary)	instant	credit	us-gaap:ValuationAllowancesAndReservesBalance

Model Structure
Network	100540 - Disclosure - Expected Impacts of Adoption of Standards Related to Revenue Recognition and Leases to Reported Results - (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureExpectedImpactsOfAdoptionOfStandardsRelatedToRevenueRecognitionAndLeasesToReportedResultsDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Accounting Policies [Abstract]	Abstract	duration		us-gaap:AccountingPoliciesAbstract
2	us-gaap:NewAccountingPronouncementsOrChangeInAccountingPrincipleTable (terseLabel)	Table	duration		us-gaap:NewAccountingPronouncementsOrChangeInAccountingPrincipleTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:AdjustmentsForNewAccountingPronouncementsAxis (terseLabel)	Axis	duration		us-gaap:AdjustmentsForNewAccountingPronouncementsAxis
6	us-gaap:TypeOfAdoptionMember (terseLabel)	Member	duration		us-gaap:TypeOfAdoptionMember
7	New Revenue Standard Adjustment	Member	duration		us-gaap:AccountingStandardsUpdate201409Member
8	New Lease Standard Adjustment	Member	duration		us-gaap:AccountingStandardsUpdate201602Member
9	us-gaap:StatementScenarioAxis (terseLabel)	Axis	duration		us-gaap:StatementScenarioAxis
10	us-gaap:ScenarioUnspecifiedDomain (terseLabel)	Member	duration		us-gaap:ScenarioUnspecifiedDomain
11	us-gaap:ScenarioPlanMember (terseLabel)	Member	duration		us-gaap:ScenarioPlanMember
12	us-gaap:NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems (terseLabel)	LineItems	duration		us-gaap:NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems
13	Income statements:	Abstract	duration		us-gaap:IncomeStatementAbstract
14	us-gaap:SalesRevenueNet (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:SalesRevenueNet
15	us-gaap:IncomeTaxExpenseBenefit (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:IncomeTaxExpenseBenefit
16	us-gaap:NetIncomeLoss (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:NetIncomeLoss
17	us-gaap:EarningsPerShareDiluted (terseLabel)	Concept (Per-Share)	duration		us-gaap:EarningsPerShareDiluted
18	Balance sheets:	Abstract	duration		us-gaap:StatementOfFinancialPositionAbstract
19	Accounts receivable, net	Concept (Monetary)	instant	debit	us-gaap:AccountsReceivableNetCurrent
20	us-gaap:OperatingLeaseRightOfUseAsset (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:OperatingLeaseRightOfUseAsset
21	us-gaap:OtherAssets (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:OtherAssets
22	us-gaap:DeferredRevenue (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:DeferredRevenue
23	us-gaap:DeferredTaxLiabilitiesNoncurrent (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:DeferredTaxLiabilitiesNoncurrent
24	us-gaap:OperatingLeaseLiability (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:OperatingLeaseLiability
25	us-gaap:OtherLiabilities (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:OtherLiabilities
26	Stockholders' equity	Concept (Monetary)	instant	credit	us-gaap:StockholdersEquity

Model Structure
Network	100550 - Disclosure - Basic and Diluted Earnings Per Share (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureBasicAndDilutedEarningsPerShareDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Earnings Per Share Basic And Diluted [Abstract]	Abstract	duration		us-gaap:EarningsPerShareBasicAndDilutedAbstract
2	msft:ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassTable (terseLabel)	Table	duration		msft:ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	msft:ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassLineItems (terseLabel)	LineItems	duration		msft:ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassLineItems
6	Net income available for common shareholders (A)	Concept (Monetary)	duration	credit	us-gaap:NetIncomeLoss
7	Weighted average outstanding shares of common stock (B)	Concept (Shares)	duration		us-gaap:WeightedAverageNumberOfSharesOutstandingBasic
8	us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements (terseLabel)	Concept (Shares)	duration		us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
9	Common stock and common stock equivalents (C)	Concept (Shares)	duration		us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding
10	Earnings Per Share	Abstract	duration		us-gaap:EarningsPerShareAbstract
11	us-gaap:EarningsPerShareBasic (verboseLabel)	Concept (Per-Share)	duration		us-gaap:EarningsPerShareBasic
12	us-gaap:EarningsPerShareDiluted (verboseLabel)	Concept (Per-Share)	duration		us-gaap:EarningsPerShareDiluted

Model Structure
Network	100560 - Disclosure - Components of Other Income (Expense), Net (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureComponentsOfOtherIncomeExpenseNetDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Other Income And Expenses [Abstract]	Abstract	duration		us-gaap:OtherIncomeAndExpensesAbstract
2	msft:OtherIncomeExpenseTable (terseLabel)	Table	duration		msft:OtherIncomeExpenseTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:ComponentOfOtherIncomeNonoperatingLineItems (terseLabel)	LineItems	duration		us-gaap:ComponentOfOtherIncomeNonoperatingLineItems
6	us-gaap:InvestmentIncomeNet (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:InvestmentIncomeNet
7	us-gaap:InterestExpense (negatedLabel)	Concept (Monetary)	duration	debit	us-gaap:InterestExpense
8	us-gaap:GainLossOnInvestments (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:GainLossOnInvestments
9	us-gaap:GainLossOnDerivativeInstrumentsNetPretax (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:GainLossOnDerivativeInstrumentsNetPretax
10	us-gaap:ForeignCurrencyTransactionGainLossBeforeTax (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:ForeignCurrencyTransactionGainLossBeforeTax
11	us-gaap:OtherNonoperatingIncomeExpense (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:OtherNonoperatingIncomeExpense
12	Total	Concept (Monetary)	duration	credit	us-gaap:NonoperatingIncomeExpense

Model Structure
Network	100570 - Disclosure - Net Recognized Gains (Losses) on Investments (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureNetRecognizedGainsLossesOnInvestmentsDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Statement Of Income And Comprehensive Income [Abstract]	Abstract	duration		us-gaap:StatementOfIncomeAndComprehensiveIncomeAbstract
2	us-gaap:ScheduleOfGainLossOnInvestmentsTable (terseLabel)	Table	duration		us-gaap:ScheduleOfGainLossOnInvestmentsTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:ScheduleOfGainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostIncomeStatementReportedAmountsSummaryLineItems (terseLabel)	LineItems	duration		us-gaap:ScheduleOfGainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostIncomeStatementReportedAmountsSummaryLineItems
6	us-gaap:MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount (negatedLabel)	Concept (Monetary)	duration	debit	us-gaap:MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount
7	us-gaap:AvailableForSaleSecuritiesGrossRealizedGains (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:AvailableForSaleSecuritiesGrossRealizedGains
8	us-gaap:AvailableForSaleSecuritiesGrossRealizedLosses (negatedLabel)	Concept (Monetary)	duration	debit	us-gaap:AvailableForSaleSecuritiesGrossRealizedLosses
9	Total	Concept (Monetary)	duration	credit	us-gaap:GainLossOnInvestments

Model Structure
Network	100580 - Disclosure - Investment Components, Including Associated Derivatives (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureInvestmentComponentsIncludingAssociatedDerivativesDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Investments Debt And Equity Securities [Abstract]	Abstract	duration		us-gaap:InvestmentsDebtAndEquitySecuritiesAbstract
2	msft:CashCashEquivalentsAndInvestmentsTable (terseLabel)	Table	duration		msft:CashCashEquivalentsAndInvestmentsTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:InvestmentTypeAxis (terseLabel)	Axis	duration		us-gaap:InvestmentTypeAxis
6	us-gaap:InvestmentTypeCategorizationMember (terseLabel)	Member	duration		us-gaap:InvestmentTypeCategorizationMember
7	us-gaap:CashMember (terseLabel)	Member	duration		us-gaap:CashMember
8	us-gaap:MoneyMarketFundsMember (terseLabel)	Member	duration		us-gaap:MoneyMarketFundsMember
9	us-gaap:CommercialPaperMember (terseLabel)	Member	duration		us-gaap:CommercialPaperMember
10	us-gaap:CertificatesOfDepositMember (terseLabel)	Member	duration		us-gaap:CertificatesOfDepositMember
11	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (terseLabel)	Member	duration		us-gaap:USGovernmentAgenciesDebtSecuritiesMember
12	us-gaap:ForeignGovernmentDebtSecuritiesMember (terseLabel)	Member	duration		us-gaap:ForeignGovernmentDebtSecuritiesMember
13	us-gaap:AssetBackedSecuritiesMember (terseLabel)	Member	duration		us-gaap:AssetBackedSecuritiesMember
14	us-gaap:CorporateDebtSecuritiesMember (terseLabel)	Member	duration		us-gaap:CorporateDebtSecuritiesMember
15	us-gaap:USStatesAndPoliticalSubdivisionsMember (terseLabel)	Member	duration		us-gaap:USStatesAndPoliticalSubdivisionsMember
16	us-gaap:EquitySecuritiesMember (terseLabel)	Member	duration		us-gaap:EquitySecuritiesMember
17	msft:OtherSecurityInvestmentsMember (terseLabel)	Member	duration		msft:OtherSecurityInvestmentsMember
18	msft:CashCashEquivalentsAndInvestmentsLineItems (terseLabel)	LineItems	duration		msft:CashCashEquivalentsAndInvestmentsLineItems
19	us-gaap:AvailableForSaleSecuritiesAmortizedCost (totalLabel)	Concept (Monetary)	instant	debit	us-gaap:AvailableForSaleSecuritiesAmortizedCost
20	us-gaap:EquityMethodInvestmentAggregateCost (totalLabel)	Concept (Monetary)	instant	debit	us-gaap:EquityMethodInvestmentAggregateCost
21	us-gaap:Cash (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:Cash
22	us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
23	us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax (negatedLabel)	Concept (Monetary)	instant	debit	us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
24	us-gaap:AvailableForSaleSecurities (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:AvailableForSaleSecurities
25	us-gaap:EquityMethodInvestments (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:EquityMethodInvestments
26	us-gaap:CashAndCashEquivalentsAtCarryingValue (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:CashAndCashEquivalentsAtCarryingValue
27	Short-term Investments	Concept (Monetary)	instant	debit	us-gaap:AvailableForSaleSecuritiesCurrent
28	Equity and Other Investments	Concept (Monetary)	instant	debit	us-gaap:LongTermInvestments

Model Structure
Network	100590 - Disclosure - Investments - Cost Method - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureInvestmentsCostMethodAdditionalInformationDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Investments Debt And Equity Securities [Abstract]	Abstract	duration		us-gaap:InvestmentsDebtAndEquitySecuritiesAbstract
2	us-gaap:ScheduleOfCostMethodInvestmentsTable (terseLabel)	Table	duration		us-gaap:ScheduleOfCostMethodInvestmentsTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:FairValueByMeasurementFrequencyAxis (terseLabel)	Axis	duration		us-gaap:FairValueByMeasurementFrequencyAxis
6	us-gaap:FairValueMeasurementFrequencyDomain (terseLabel)	Member	duration		us-gaap:FairValueMeasurementFrequencyDomain
7	us-gaap:FairValueMeasurementsNonrecurringMember (terseLabel)	Member	duration		us-gaap:FairValueMeasurementsNonrecurringMember
8	us-gaap:ScheduleOfCostMethodInvestmentsLineItems (terseLabel)	LineItems	duration		us-gaap:ScheduleOfCostMethodInvestmentsLineItems
9	us-gaap:CostMethodInvestments (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:CostMethodInvestments

Model Structure
Network	100600 - Disclosure - Investments - Secured Borrowings and Loaned Securities - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureInvestmentsSecuredBorrowingsAndLoanedSecuritiesAdditionalInformationDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Investments Debt And Equity Securities [Abstract]	Abstract	duration		us-gaap:InvestmentsDebtAndEquitySecuritiesAbstract
2	invest:InvestmentTable (terseLabel)	Table	duration		invest:InvestmentTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:InvestmentTypeAxis (terseLabel)	Axis	duration		us-gaap:InvestmentTypeAxis
6	us-gaap:InvestmentTypeCategorizationMember (terseLabel)	Member	duration		us-gaap:InvestmentTypeCategorizationMember
7	U.S. Government and Agency Securities	Member	duration		us-gaap:USGovernmentAgenciesDebtSecuritiesMember
8	us-gaap:CashMember (terseLabel)	Member	duration		us-gaap:CashMember
9	invest:InvestmentLineItems (terseLabel)	LineItems	duration		invest:InvestmentLineItems
10	us-gaap:SecuritiesReceivedAsCollateral (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:SecuritiesReceivedAsCollateral

Model Structure
Network	100610 - Disclosure - Unrealized Losses on Investments (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureUnrealizedLossesOnInvestmentsDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Investments Debt And Equity Securities [Abstract]	Abstract	duration		us-gaap:InvestmentsDebtAndEquitySecuritiesAbstract
2	msft:InvestmentsUnrealizedLossPositionTable (terseLabel)	Table	duration		msft:InvestmentsUnrealizedLossPositionTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:MajorTypesOfDebtAndEquitySecuritiesAxis (terseLabel)	Axis	duration		us-gaap:MajorTypesOfDebtAndEquitySecuritiesAxis
6	us-gaap:MajorTypesOfDebtAndEquitySecuritiesDomain (terseLabel)	Member	duration		us-gaap:MajorTypesOfDebtAndEquitySecuritiesDomain
7	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (terseLabel)	Member	duration		us-gaap:USGovernmentAgenciesDebtSecuritiesMember
8	us-gaap:ForeignGovernmentDebtSecuritiesMember (terseLabel)	Member	duration		us-gaap:ForeignGovernmentDebtSecuritiesMember
9	us-gaap:AssetBackedSecuritiesMember (terseLabel)	Member	duration		us-gaap:AssetBackedSecuritiesMember
10	us-gaap:CorporateDebtSecuritiesMember (terseLabel)	Member	duration		us-gaap:CorporateDebtSecuritiesMember
11	us-gaap:EquitySecuritiesMember (terseLabel)	Member	duration		us-gaap:EquitySecuritiesMember
12	msft:InvestmentsUnrealizedLossPositionLineItems (terseLabel)	LineItems	duration		msft:InvestmentsUnrealizedLossPositionLineItems
13	us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
14	us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss (negatedLabel)	Concept (Monetary)	instant	debit	us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
15	us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
16	us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss (negatedLabel)	Concept (Monetary)	instant	debit	us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
17	us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue (totalLabel)	Concept (Monetary)	instant	debit	us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue
18	us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss (negatedTotalLabel)	Concept (Monetary)	instant	debit	us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss

Model Structure
Network	100620 - Disclosure - Debt Investment Maturities (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureDebtInvestmentMaturitiesDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Investments Debt And Equity Securities [Abstract]	Abstract	duration		us-gaap:InvestmentsDebtAndEquitySecuritiesAbstract
2	msft:InvestmentsClassifiedByContractualMaturityDateTable (terseLabel)	Table	duration		msft:InvestmentsClassifiedByContractualMaturityDateTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	msft:InvestmentsClassifiedByContractualMaturityDateLineItems (terseLabel)	LineItems	duration		msft:InvestmentsClassifiedByContractualMaturityDateLineItems
6	us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostBasisRollingMaturityAbstract (terseLabel)	Abstract	duration		us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostBasisRollingMaturityAbstract
7	us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis
8	us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis
9	us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis
10	us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis
11	us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis (totalLabel)	Concept (Monetary)	instant	debit	us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
12	us-gaap:AvailableForSaleSecuritiesDebtMaturitiesFairValueRollingMaturityAbstract (terseLabel)	Abstract	duration		us-gaap:AvailableForSaleSecuritiesDebtMaturitiesFairValueRollingMaturityAbstract
13	us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue
14	us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue
15	us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue
16	us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue
17	us-gaap:AvailableForSaleSecuritiesDebtSecurities (totalLabel)	Concept (Monetary)	instant	debit	us-gaap:AvailableForSaleSecuritiesDebtSecurities

Model Structure
Network	100630 - Disclosure - Derivatives - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureDerivativesAdditionalInformationDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Derivative Instruments And Hedging Activities Disclosure [Abstract]	Abstract	duration		us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
2	us-gaap:DerivativeTable (terseLabel)	Table	duration		us-gaap:DerivativeTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:PositionAxis (terseLabel)	Axis	duration		us-gaap:PositionAxis
6	us-gaap:PositionDomain (terseLabel)	Member	duration		us-gaap:PositionDomain
7	us-gaap:ShortMember (terseLabel)	Member	duration		us-gaap:ShortMember
8	us-gaap:LongMember (terseLabel)	Member	duration		us-gaap:LongMember
9	us-gaap:DerivativeInstrumentsGainLossByHedgingRelationshipAxis (terseLabel)	Axis	duration		us-gaap:DerivativeInstrumentsGainLossByHedgingRelationshipAxis
10	us-gaap:HedgingRelationshipDomain (terseLabel)	Member	duration		us-gaap:HedgingRelationshipDomain
11	us-gaap:CashFlowHedgingMember (terseLabel)	Member	duration		us-gaap:CashFlowHedgingMember
12	us-gaap:FairValueHedgingMember (terseLabel)	Member	duration		us-gaap:FairValueHedgingMember
13	us-gaap:DerivativeInstrumentRiskAxis (terseLabel)	Axis	duration		us-gaap:DerivativeInstrumentRiskAxis
14	us-gaap:DerivativeContractTypeDomain (terseLabel)	Member	duration		us-gaap:DerivativeContractTypeDomain
15	us-gaap:ForeignExchangeContractMember (terseLabel)	Member	duration		us-gaap:ForeignExchangeContractMember
16	us-gaap:EquityContractMember (terseLabel)	Member	duration		us-gaap:EquityContractMember
17	us-gaap:InterestRateContractMember (terseLabel)	Member	duration		us-gaap:InterestRateContractMember
18	us-gaap:MortgageBackedSecuritiesMember (terseLabel)	Member	duration		us-gaap:MortgageBackedSecuritiesMember
19	us-gaap:CreditRiskContractMember (terseLabel)	Member	duration		us-gaap:CreditRiskContractMember
20	us-gaap:CommodityContractMember (terseLabel)	Member	duration		us-gaap:CommodityContractMember
21	us-gaap:HedgingDesignationAxis (terseLabel)	Axis	duration		us-gaap:HedgingDesignationAxis
22	us-gaap:HedgingDesignationDomain (terseLabel)	Member	duration		us-gaap:HedgingDesignationDomain
23	us-gaap:NondesignatedMember (terseLabel)	Member	duration		us-gaap:NondesignatedMember
24	us-gaap:DesignatedAsHedgingInstrumentMember (terseLabel)	Member	duration		us-gaap:DesignatedAsHedgingInstrumentMember
25	us-gaap:LongtermDebtTypeAxis (terseLabel)	Axis	duration		us-gaap:LongtermDebtTypeAxis
26	us-gaap:LongtermDebtTypeDomain (terseLabel)	Member	duration		us-gaap:LongtermDebtTypeDomain
27	us-gaap:UnsecuredDebtMember (terseLabel)	Member	duration		us-gaap:UnsecuredDebtMember
28	us-gaap:DerivativeLineItems (terseLabel)	LineItems	duration		us-gaap:DerivativeLineItems
29	us-gaap:MaximumLengthOfTimeForeignCurrencyCashFlowHedge (terseLabel)	Concept (Duration)	duration		us-gaap:MaximumLengthOfTimeForeignCurrencyCashFlowHedge
30	invest:DerivativeNotionalAmount (terseLabel)	Concept (Monetary)	instant		invest:DerivativeNotionalAmount
31	msft:FinancialInstrumentCovenantMinimumLiquidityRequirement (terseLabel)	Concept (Monetary)	duration	debit	msft:FinancialInstrumentCovenantMinimumLiquidityRequirement
32	us-gaap:DebtInstrumentCreditRating (terseLabel)	Concept (String)	duration		us-gaap:DebtInstrumentCreditRating
33	msft:FinancialInstrumentCovenantMinimumLiquidity (terseLabel)	Concept (Monetary)	instant	debit	msft:FinancialInstrumentCovenantMinimumLiquidity
34	us-gaap:ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months

Model Structure
Network	100640 - Disclosure - Fair Values of Derivative Instruments (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureFairValuesOfDerivativeInstrumentsDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Derivative Instruments And Hedging Activities Disclosure [Abstract]	Abstract	duration		us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
2	us-gaap:FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable (terseLabel)	Table	duration		us-gaap:FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:HedgingDesignationAxis (terseLabel)	Axis	duration		us-gaap:HedgingDesignationAxis
6	us-gaap:HedgingDesignationDomain (terseLabel)	Member	duration		us-gaap:HedgingDesignationDomain
7	us-gaap:NondesignatedMember (terseLabel)	Member	duration		us-gaap:NondesignatedMember
8	us-gaap:DesignatedAsHedgingInstrumentMember (terseLabel)	Member	duration		us-gaap:DesignatedAsHedgingInstrumentMember
9	us-gaap:BalanceSheetLocationAxis (terseLabel)	Axis	duration		us-gaap:BalanceSheetLocationAxis
10	us-gaap:BalanceSheetLocationDomain (terseLabel)	Member	duration		us-gaap:BalanceSheetLocationDomain
11	us-gaap:ShortTermInvestmentsMember (terseLabel)	Member	duration		us-gaap:ShortTermInvestmentsMember
12	us-gaap:OtherCurrentAssetsMember (terseLabel)	Member	duration		us-gaap:OtherCurrentAssetsMember
13	msft:EquityAndOtherInvestmentsMember (terseLabel)	Member	duration		msft:EquityAndOtherInvestmentsMember
14	us-gaap:OtherNoncurrentAssetsMember (terseLabel)	Member	duration		us-gaap:OtherNoncurrentAssetsMember
15	us-gaap:OtherCurrentLiabilitiesMember (terseLabel)	Member	duration		us-gaap:OtherCurrentLiabilitiesMember
16	us-gaap:OtherNoncurrentLiabilitiesMember (terseLabel)	Member	duration		us-gaap:OtherNoncurrentLiabilitiesMember
17	us-gaap:DerivativeInstrumentRiskAxis (terseLabel)	Axis	duration		us-gaap:DerivativeInstrumentRiskAxis
18	us-gaap:DerivativeContractTypeDomain (terseLabel)	Member	duration		us-gaap:DerivativeContractTypeDomain
19	us-gaap:ForeignExchangeContractMember (terseLabel)	Member	duration		us-gaap:ForeignExchangeContractMember
20	us-gaap:EquityContractMember (terseLabel)	Member	duration		us-gaap:EquityContractMember
21	us-gaap:InterestRateContractMember (terseLabel)	Member	duration		us-gaap:InterestRateContractMember
22	us-gaap:CreditRiskContractMember (terseLabel)	Member	duration		us-gaap:CreditRiskContractMember
23	msft:BalanceSheetOffsettingEligibilityAxis (terseLabel)	Axis	duration		msft:BalanceSheetOffsettingEligibilityAxis
24	msft:BalanceSheetOffsettingEligibilityDomain (terseLabel)	Member	duration		msft:BalanceSheetOffsettingEligibilityDomain
25	msft:EligibleForOffsettingMember (terseLabel)	Member	duration		msft:EligibleForOffsettingMember
26	us-gaap:DerivativesFairValueLineItems (terseLabel)	LineItems	duration		us-gaap:DerivativesFairValueLineItems
27	us-gaap:DerivativeFairValueOfDerivativeAsset (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:DerivativeFairValueOfDerivativeAsset
28	us-gaap:DerivativeAssetFairValueGrossLiability (negatedLabel)	Concept (Monetary)	instant	credit	us-gaap:DerivativeAssetFairValueGrossLiability
29	msft:DerivativeAssetsNetAmountsPresentedInBalanceSheet (totalLabel)	Concept (Monetary)	instant	debit	msft:DerivativeAssetsNetAmountsPresentedInBalanceSheet
30	msft:DerivativeFairValueOfDerivativeAssetAmountNotOffset (terseLabel)	Concept (Monetary)	instant	debit	msft:DerivativeFairValueOfDerivativeAssetAmountNotOffset
31	us-gaap:DerivativeCollateralRightToReclaimCash (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:DerivativeCollateralRightToReclaimCash
32	msft:DerivativeAssetsPotentialNetAmountsNotPresentedInBalanceSheet (totalLabel)	Concept (Monetary)	instant	debit	msft:DerivativeAssetsPotentialNetAmountsNotPresentedInBalanceSheet
33	us-gaap:DerivativeFairValueOfDerivativeLiability (negatedLabel)	Concept (Monetary)	instant	credit	us-gaap:DerivativeFairValueOfDerivativeLiability
34	us-gaap:DerivativeLiabilityFairValueGrossAsset (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:DerivativeLiabilityFairValueGrossAsset
35	msft:DerivativeLiabilitiesNetAmountsPresentedInBalanceSheet (negatedTotalLabel)	Concept (Monetary)	instant	credit	msft:DerivativeLiabilitiesNetAmountsPresentedInBalanceSheet
36	msft:DerivativeFairValueOfDerivativeLiabilityAmountNotOffset (negatedLabel)	Concept (Monetary)	instant	credit	msft:DerivativeFairValueOfDerivativeLiabilityAmountNotOffset
37	us-gaap:DerivativeCollateralObligationToReturnCash (negatedLabel)	Concept (Monetary)	instant	credit	us-gaap:DerivativeCollateralObligationToReturnCash
38	msft:DerivativeLiabilitiesPotentialNetAmountsNotPresentedInBalanceSheet (negatedTotalLabel)	Concept (Monetary)	instant	credit	msft:DerivativeLiabilitiesPotentialNetAmountsNotPresentedInBalanceSheet

Model Structure
Network	100650 - Disclosure - Gains (Losses) on Fair Value Hedges and Related Hedged Items (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureGainsLossesOnFairValueHedgesAndRelatedHedgedItemsDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Derivative Instruments And Hedging Activities Disclosure [Abstract]	Abstract	duration		us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
2	us-gaap:DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable (terseLabel)	Table	duration		us-gaap:DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:DerivativeInstrumentRiskAxis (terseLabel)	Axis	duration		us-gaap:DerivativeInstrumentRiskAxis
6	us-gaap:DerivativeContractTypeDomain (terseLabel)	Member	duration		us-gaap:DerivativeContractTypeDomain
7	us-gaap:ForeignExchangeContractMember (terseLabel)	Member	duration		us-gaap:ForeignExchangeContractMember
8	us-gaap:EquityContractMember (terseLabel)	Member	duration		us-gaap:EquityContractMember
9	us-gaap:DerivativeInstrumentsGainLossLineItems (terseLabel)	LineItems	duration		us-gaap:DerivativeInstrumentsGainLossLineItems
10	us-gaap:ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1 (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1
11	us-gaap:ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1 (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1
12	us-gaap:GainLossOnFairValueHedgeIneffectivenessNet (totalLabel)	Concept (Monetary)	duration	credit	us-gaap:GainLossOnFairValueHedgeIneffectivenessNet
13	us-gaap:GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet

Model Structure
Network	100660 - Disclosure - Gains (Losses) Related to Cash Flow Hedges (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureGainsLossesRelatedToCashFlowHedgesDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Derivative Instruments And Hedging Activities Disclosure [Abstract]	Abstract	duration		us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
2	us-gaap:DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable (terseLabel)	Table	duration		us-gaap:DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:HedgingDesignationAxis (terseLabel)	Axis	duration		us-gaap:HedgingDesignationAxis
6	us-gaap:HedgingDesignationDomain (terseLabel)	Member	duration		us-gaap:HedgingDesignationDomain
7	us-gaap:DesignatedAsHedgingInstrumentMember (terseLabel)	Member	duration		us-gaap:DesignatedAsHedgingInstrumentMember
8	us-gaap:DerivativeInstrumentRiskAxis (terseLabel)	Axis	duration		us-gaap:DerivativeInstrumentRiskAxis
9	us-gaap:DerivativeContractTypeDomain (terseLabel)	Member	duration		us-gaap:DerivativeContractTypeDomain
10	us-gaap:ForeignExchangeContractMember (terseLabel)	Member	duration		us-gaap:ForeignExchangeContractMember
11	us-gaap:DerivativeInstrumentsGainLossLineItems (terseLabel)	LineItems	duration		us-gaap:DerivativeInstrumentsGainLossLineItems
12	msft:GainLossOnCashFlowHedgeEffectivenessNetAbstract (terseLabel)	Abstract	duration		msft:GainLossOnCashFlowHedgeEffectivenessNetAbstract
13	us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax
14	us-gaap:ForeignCurrencyCashFlowHedgeGainLossReclassifiedToEarningsNet (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:ForeignCurrencyCashFlowHedgeGainLossReclassifiedToEarningsNet
15	us-gaap:DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNetAbstract (terseLabel)	Abstract	duration		us-gaap:DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNetAbstract
16	us-gaap:DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet

Model Structure
Network	100670 - Disclosure - Gains (Losses) Related to Cash Flow Hedges (Parenthetical) (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureGainsLossesRelatedToCashFlowHedgesParentheticalDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Derivative Instruments And Hedging Activities Disclosure [Abstract]	Abstract	duration		us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
2	us-gaap:DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable (terseLabel)	Table	duration		us-gaap:DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:HedgingDesignationAxis (terseLabel)	Axis	duration		us-gaap:HedgingDesignationAxis
6	us-gaap:HedgingDesignationDomain (terseLabel)	Member	duration		us-gaap:HedgingDesignationDomain
7	us-gaap:DesignatedAsHedgingInstrumentMember (terseLabel)	Member	duration		us-gaap:DesignatedAsHedgingInstrumentMember
8	us-gaap:DerivativeInstrumentRiskAxis (terseLabel)	Axis	duration		us-gaap:DerivativeInstrumentRiskAxis
9	us-gaap:DerivativeContractTypeDomain (terseLabel)	Member	duration		us-gaap:DerivativeContractTypeDomain
10	us-gaap:ForeignExchangeContractMember (terseLabel)	Member	duration		us-gaap:ForeignExchangeContractMember
11	us-gaap:DerivativeInstrumentsGainLossLineItems (terseLabel)	LineItems	duration		us-gaap:DerivativeInstrumentsGainLossLineItems
12	us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax

Model Structure
Network	100680 - Disclosure - Non-Designated Derivative Gains (Losses) (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureNonDesignatedDerivativeGainsLossesDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Derivative Instruments And Hedging Activities Disclosure [Abstract]	Abstract	duration		us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
2	us-gaap:DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable (terseLabel)	Table	duration		us-gaap:DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:DerivativeInstrumentRiskAxis (terseLabel)	Axis	duration		us-gaap:DerivativeInstrumentRiskAxis
6	us-gaap:DerivativeContractTypeDomain (terseLabel)	Member	duration		us-gaap:DerivativeContractTypeDomain
7	us-gaap:ForeignExchangeContractMember (terseLabel)	Member	duration		us-gaap:ForeignExchangeContractMember
8	us-gaap:EquityContractMember (terseLabel)	Member	duration		us-gaap:EquityContractMember
9	us-gaap:InterestRateContractMember (terseLabel)	Member	duration		us-gaap:InterestRateContractMember
10	us-gaap:CreditRiskContractMember (terseLabel)	Member	duration		us-gaap:CreditRiskContractMember
11	us-gaap:CommodityContractMember (terseLabel)	Member	duration		us-gaap:CommodityContractMember
12	us-gaap:DerivativeInstrumentsGainLossLineItems (terseLabel)	LineItems	duration		us-gaap:DerivativeInstrumentsGainLossLineItems
13	us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet

Model Structure
Network	100690 - Disclosure - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Fair Value Disclosures [Abstract]	Abstract	duration		us-gaap:FairValueDisclosuresAbstract
2	us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable (terseLabel)	Table	duration		us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:FairValueByLiabilityClassAxis (terseLabel)	Axis	duration		us-gaap:FairValueByLiabilityClassAxis
6	us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain (terseLabel)	Member	duration		us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain
7	us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember (terseLabel)	Member	duration		us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember
8	msft:RightOfOffsetAndNettingAxis (terseLabel)	Axis	duration		msft:RightOfOffsetAndNettingAxis
9	msft:RightOfOffsetAndNettingDomain (terseLabel)	Member	duration		msft:RightOfOffsetAndNettingDomain
10	msft:GrossMember (terseLabel)	Member	duration		msft:GrossMember
11	msft:NettingMember (terseLabel)	Member	duration		msft:NettingMember
12	msft:NetMember (terseLabel)	Member	duration		msft:NetMember
13	us-gaap:FairValueByAssetClassAxis (terseLabel)	Axis	duration		us-gaap:FairValueByAssetClassAxis
14	us-gaap:FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain (terseLabel)	Member	duration		us-gaap:FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain
15	us-gaap:MoneyMarketFundsMember (terseLabel)	Member	duration		us-gaap:MoneyMarketFundsMember
16	us-gaap:CommercialPaperMember (terseLabel)	Member	duration		us-gaap:CommercialPaperMember
17	us-gaap:CertificatesOfDepositMember (terseLabel)	Member	duration		us-gaap:CertificatesOfDepositMember
18	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (terseLabel)	Member	duration		us-gaap:USGovernmentAgenciesDebtSecuritiesMember
19	us-gaap:ForeignGovernmentDebtSecuritiesMember (terseLabel)	Member	duration		us-gaap:ForeignGovernmentDebtSecuritiesMember
20	us-gaap:AssetBackedSecuritiesMember (terseLabel)	Member	duration		us-gaap:AssetBackedSecuritiesMember
21	us-gaap:CorporateDebtSecuritiesMember (terseLabel)	Member	duration		us-gaap:CorporateDebtSecuritiesMember
22	us-gaap:USStatesAndPoliticalSubdivisionsMember (terseLabel)	Member	duration		us-gaap:USStatesAndPoliticalSubdivisionsMember
23	us-gaap:EquitySecuritiesMember (terseLabel)	Member	duration		us-gaap:EquitySecuritiesMember
24	us-gaap:DerivativeFinancialInstrumentsAssetsMember (terseLabel)	Member	duration		us-gaap:DerivativeFinancialInstrumentsAssetsMember
25	us-gaap:FairValueByFairValueHierarchyLevelAxis (terseLabel)	Axis	duration		us-gaap:FairValueByFairValueHierarchyLevelAxis
26	us-gaap:FairValueMeasurementsFairValueHierarchyDomain (terseLabel)	Member	duration		us-gaap:FairValueMeasurementsFairValueHierarchyDomain
27	us-gaap:FairValueInputsLevel1Member (terseLabel)	Member	duration		us-gaap:FairValueInputsLevel1Member
28	us-gaap:FairValueInputsLevel2Member (terseLabel)	Member	duration		us-gaap:FairValueInputsLevel2Member
29	us-gaap:FairValueInputsLevel3Member (terseLabel)	Member	duration		us-gaap:FairValueInputsLevel3Member
30	us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems (terseLabel)	LineItems	duration		us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
31	us-gaap:AssetsFairValueDisclosureRecurring (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:AssetsFairValueDisclosureRecurring
32	us-gaap:LiabilitiesFairValueDisclosureRecurring (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:LiabilitiesFairValueDisclosureRecurring

Model Structure
Network	100700 - Disclosure - Reconciliation of Total Assets Measured at Fair Value on Recurring Basis to Balance Sheet Presentation (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureReconciliationOfTotalAssetsMeasuredAtFairValueOnRecurringBasisToBalanceSheetPresentationDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Fair Value Disclosures [Abstract]	Abstract	duration		us-gaap:FairValueDisclosuresAbstract
2	us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable (terseLabel)	Table	duration		us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:FairValueByMeasurementFrequencyAxis (terseLabel)	Axis	duration		us-gaap:FairValueByMeasurementFrequencyAxis
6	us-gaap:FairValueMeasurementFrequencyDomain (terseLabel)	Member	duration		us-gaap:FairValueMeasurementFrequencyDomain
7	us-gaap:FairValueMeasurementsRecurringMember (terseLabel)	Member	duration		us-gaap:FairValueMeasurementsRecurringMember
8	us-gaap:FairValueMeasurementsNonrecurringMember (terseLabel)	Member	duration		us-gaap:FairValueMeasurementsNonrecurringMember
9	us-gaap:BalanceSheetLocationAxis (terseLabel)	Axis	duration		us-gaap:BalanceSheetLocationAxis
10	us-gaap:BalanceSheetLocationDomain (terseLabel)	Member	duration		us-gaap:BalanceSheetLocationDomain
11	us-gaap:OtherAssetsMember (terseLabel)	Member	duration		us-gaap:OtherAssetsMember
12	us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems (terseLabel)	LineItems	duration		us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
13	Net fair value of assets measured at fair value on a recurring basis	Concept (Monetary)	instant	debit	us-gaap:AssetsFairValueDisclosureRecurring
14	Cash	Concept (Monetary)	instant	debit	us-gaap:Cash
15	Common and preferred stock measured at fair value on a nonrecurring basis	Concept (Monetary)	instant	debit	us-gaap:CostMethodInvestments
16	Other investments measured at fair value on a nonrecurring basis	Concept (Monetary)	instant	debit	us-gaap:EquityMethodInvestments
17	us-gaap:DerivativeAssets (negatedLabel)	Concept (Monetary)	instant	debit	us-gaap:DerivativeAssets
18	us-gaap:OtherAssetsFairValueDisclosure (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:OtherAssetsFairValueDisclosure
19	Recorded basis of investment components	Concept (Monetary)	instant	debit	us-gaap:AvailableForSaleSecurities

Model Structure
Network	100710 - Disclosure - Components of Inventories (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureComponentsOfInventoriesDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Inventory Disclosure [Abstract]	Abstract	duration		us-gaap:InventoryDisclosureAbstract
2	us-gaap:InventoryCurrentTable (terseLabel)	Table	duration		us-gaap:InventoryCurrentTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:InventoryLineItems (terseLabel)	LineItems	duration		us-gaap:InventoryLineItems
6	us-gaap:InventoryRawMaterialsNetOfReserves (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:InventoryRawMaterialsNetOfReserves
7	us-gaap:InventoryWorkInProcessNetOfReserves (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:InventoryWorkInProcessNetOfReserves
8	us-gaap:InventoryFinishedGoodsNetOfReserves (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:InventoryFinishedGoodsNetOfReserves
9	Total	Concept (Monetary)	instant	debit	us-gaap:InventoryNet

Model Structure
Network	100720 - Disclosure - Components of Property and Equipment (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureComponentsOfPropertyAndEquipmentDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Property Plant And Equipment [Abstract]	Abstract	duration		us-gaap:PropertyPlantAndEquipmentAbstract
2	us-gaap:ScheduleOfPropertyPlantAndEquipmentTable (terseLabel)	Table	duration		us-gaap:ScheduleOfPropertyPlantAndEquipmentTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:PropertyPlantAndEquipmentLineItems (terseLabel)	LineItems	duration		us-gaap:PropertyPlantAndEquipmentLineItems
6	us-gaap:Land (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:Land
7	us-gaap:BuildingsAndImprovementsGross (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:BuildingsAndImprovementsGross
8	us-gaap:LeaseholdImprovementsGross (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:LeaseholdImprovementsGross
9	msft:ComputerHardwareAndSoftware (terseLabel)	Concept (Monetary)	instant	debit	msft:ComputerHardwareAndSoftware
10	us-gaap:FurnitureAndFixturesGross (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:FurnitureAndFixturesGross
11	us-gaap:PropertyPlantAndEquipmentGross (totalLabel)	Concept (Monetary)	instant	debit	us-gaap:PropertyPlantAndEquipmentGross
12	Accumulated depreciation	Concept (Monetary)	instant	credit	us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
13	Total, net	Concept (Monetary)	instant	debit	us-gaap:PropertyPlantAndEquipmentNet

Model Structure
Network	100730 - Disclosure - Property and Equipment - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosurePropertyAndEquipmentAdditionalInformationDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Property Plant And Equipment [Abstract]	Abstract	duration		us-gaap:PropertyPlantAndEquipmentAbstract
2	us-gaap:ScheduleOfPropertyPlantAndEquipmentTable (terseLabel)	Table	duration		us-gaap:ScheduleOfPropertyPlantAndEquipmentTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:PropertyPlantAndEquipmentLineItems (terseLabel)	LineItems	duration		us-gaap:PropertyPlantAndEquipmentLineItems
6	us-gaap:CapitalLeasedAssetsGross (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:CapitalLeasedAssetsGross
7	us-gaap:CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation
8	us-gaap:CapitalLeaseObligationsIncurred (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:CapitalLeaseObligationsIncurred
9	us-gaap:Depreciation (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:Depreciation

Model Structure
Network	100740 - Disclosure - Business Combinations - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureBusinessCombinationsAdditionalInformationDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Business Combinations [Abstract]	Abstract	duration		us-gaap:BusinessCombinationsAbstract
2	us-gaap:ScheduleOfBusinessAcquisitionsByAcquisitionTable (terseLabel)	Table	duration		us-gaap:ScheduleOfBusinessAcquisitionsByAcquisitionTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:BusinessAcquisitionAxis (terseLabel)	Axis	duration		us-gaap:BusinessAcquisitionAxis
6	us-gaap:BusinessAcquisitionAcquireeDomain (terseLabel)	Member	duration		us-gaap:BusinessAcquisitionAcquireeDomain
7	msft:LinkedInCorporationMember (terseLabel)	Member	duration		msft:LinkedInCorporationMember
8	us-gaap:BusinessAcquisitionLineItems (terseLabel)	LineItems	duration		us-gaap:BusinessAcquisitionLineItems
9	us-gaap:BusinessAcquisitionEffectiveDateOfAcquisition1 (terseLabel)	Concept (Date)	duration		us-gaap:BusinessAcquisitionEffectiveDateOfAcquisition1
10	us-gaap:BusinessAcquisitionNameOfAcquiredEntity (terseLabel)	Concept (String)	duration		us-gaap:BusinessAcquisitionNameOfAcquiredEntity
11	us-gaap:BusinessCombinationConsiderationTransferred1 (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:BusinessCombinationConsiderationTransferred1
12	us-gaap:PaymentsToAcquireBusinessesGross (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:PaymentsToAcquireBusinessesGross

Model Structure
Network	100750 - Disclosure - Major Classes of Assets and Liabilities to Which We Allocated the Purchase Price (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureMajorClassesOfAssetsAndLiabilitiesToWhichWeAllocatedPurchasePriceDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Business Combinations [Abstract]	Abstract	duration		us-gaap:BusinessCombinationsAbstract
2	us-gaap:ScheduleOfBusinessAcquisitionsByAcquisitionTable (terseLabel)	Table	duration		us-gaap:ScheduleOfBusinessAcquisitionsByAcquisitionTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:BusinessAcquisitionAxis (terseLabel)	Axis	duration		us-gaap:BusinessAcquisitionAxis
6	us-gaap:BusinessAcquisitionAcquireeDomain (terseLabel)	Member	duration		us-gaap:BusinessAcquisitionAcquireeDomain
7	msft:LinkedInCorporationMember (terseLabel)	Member	duration		msft:LinkedInCorporationMember
8	us-gaap:BusinessAcquisitionLineItems (terseLabel)	LineItems	duration		us-gaap:BusinessAcquisitionLineItems
9	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
10	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsMarketableSecurities (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsMarketableSecurities
11	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther
12	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
13	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles (verboseLabel)	Concept (Monetary)	instant	debit	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
14	us-gaap:Goodwill (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:Goodwill
15	msft:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesShortTermDebt (negatedLabel)	Concept (Monetary)	instant	credit	msft:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesShortTermDebt
16	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther (negatedLabel)	Concept (Monetary)	instant	credit	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther
17	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent (negatedLabel)	Concept (Monetary)	instant	credit	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent
18	msft:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherLiabilitiesNet (negatedLabel)	Concept (Monetary)	instant	credit	msft:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherLiabilitiesNet
19	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet (totalLabel)	Concept (Monetary)	instant	debit	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet

Model Structure
Network	100760 - Disclosure - Major Classes of Assets and Liabilities to Which We Allocated the Purchase Price (Parenthetical) (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureMajorClassesOfAssetsAndLiabilitiesToWhichWeAllocatedPurchasePriceParentheticalDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Business Combinations [Abstract]	Abstract	duration		us-gaap:BusinessCombinationsAbstract
2	us-gaap:ScheduleOfBusinessAcquisitionsByAcquisitionTable (terseLabel)	Table	duration		us-gaap:ScheduleOfBusinessAcquisitionsByAcquisitionTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:BusinessAcquisitionAxis (terseLabel)	Axis	duration		us-gaap:BusinessAcquisitionAxis
6	us-gaap:BusinessAcquisitionAcquireeDomain (terseLabel)	Member	duration		us-gaap:BusinessAcquisitionAcquireeDomain
7	msft:LinkedInCorporationMember (terseLabel)	Member	duration		msft:LinkedInCorporationMember
8	us-gaap:BusinessAcquisitionLineItems (terseLabel)	LineItems	duration		us-gaap:BusinessAcquisitionLineItems
9	us-gaap:BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount
10	us-gaap:DebtInstrumentFaceAmount (verboseLabel)	Concept (Monetary)	instant	credit	us-gaap:DebtInstrumentFaceAmount

Model Structure
Network	100770 - Disclosure - Acquired Intangible Assets (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureAcquiredIntangibleAssetsDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Business Combinations [Abstract]	Abstract	duration		us-gaap:BusinessCombinationsAbstract
2	us-gaap:FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable (terseLabel)	Table	duration		us-gaap:FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:BusinessAcquisitionAxis (terseLabel)	Axis	duration		us-gaap:BusinessAcquisitionAxis
6	us-gaap:BusinessAcquisitionAcquireeDomain (terseLabel)	Member	duration		us-gaap:BusinessAcquisitionAcquireeDomain
7	msft:LinkedInCorporationMember (terseLabel)	Member	duration		msft:LinkedInCorporationMember
8	us-gaap:FiniteLivedIntangibleAssetsByMajorClassAxis (terseLabel)	Axis	duration		us-gaap:FiniteLivedIntangibleAssetsByMajorClassAxis
9	us-gaap:FiniteLivedIntangibleAssetsMajorClassNameDomain (terseLabel)	Member	duration		us-gaap:FiniteLivedIntangibleAssetsMajorClassNameDomain
10	us-gaap:CustomerRelationshipsMember (terseLabel)	Member	duration		us-gaap:CustomerRelationshipsMember
11	us-gaap:MarketingRelatedIntangibleAssetsMember (terseLabel)	Member	duration		us-gaap:MarketingRelatedIntangibleAssetsMember
12	us-gaap:TechnologyBasedIntangibleAssetsMember (terseLabel)	Member	duration		us-gaap:TechnologyBasedIntangibleAssetsMember
13	us-gaap:ContractualRightsMember (terseLabel)	Member	duration		us-gaap:ContractualRightsMember
14	us-gaap:AcquiredFiniteLivedIntangibleAssetsLineItems (terseLabel)	LineItems	duration		us-gaap:AcquiredFiniteLivedIntangibleAssetsLineItems
15	Fair value of intangible assets acquired	Concept (Monetary)	instant	debit	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
16	us-gaap:AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife (terseLabel)	Concept (Duration)	duration		us-gaap:AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife

Model Structure
Network	100780 - Disclosure - Revenue and Operating Loss Attributable to Acquiree, Since the Date of Acquisition (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureRevenueAndOperatingLossAttributableToAcquireeSinceDateOfAcquisitionDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Business Combinations [Abstract]	Abstract	duration		us-gaap:BusinessCombinationsAbstract
2	us-gaap:ScheduleOfBusinessAcquisitionsByAcquisitionTable (terseLabel)	Table	duration		us-gaap:ScheduleOfBusinessAcquisitionsByAcquisitionTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:BusinessAcquisitionAxis (terseLabel)	Axis	duration		us-gaap:BusinessAcquisitionAxis
6	us-gaap:BusinessAcquisitionAcquireeDomain (terseLabel)	Member	duration		us-gaap:BusinessAcquisitionAcquireeDomain
7	msft:LinkedInCorporationMember (terseLabel)	Member	duration		msft:LinkedInCorporationMember
8	us-gaap:BusinessAcquisitionLineItems (terseLabel)	LineItems	duration		us-gaap:BusinessAcquisitionLineItems
9	us-gaap:BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual
10	us-gaap:BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual

Model Structure
Network	100790 - Disclosure - Supplemental Consolidated Financial Results on Unaudited Pro Forma Basis, as If the Acquisition Had Been Consummated on Beginning of Period (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureSupplementalConsolidatedFinancialResultsOnUnauditedProFormaBasisAsIfAcquisitionHadBeenConsummatedOnBeginningOfPeriodDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Business Combinations [Abstract]	Abstract	duration		us-gaap:BusinessCombinationsAbstract
2	us-gaap:ScheduleOfBusinessAcquisitionsByAcquisitionTable (terseLabel)	Table	duration		us-gaap:ScheduleOfBusinessAcquisitionsByAcquisitionTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:BusinessAcquisitionAxis (terseLabel)	Axis	duration		us-gaap:BusinessAcquisitionAxis
6	us-gaap:BusinessAcquisitionAcquireeDomain (terseLabel)	Member	duration		us-gaap:BusinessAcquisitionAcquireeDomain
7	msft:LinkedInCorporationMember (terseLabel)	Member	duration		msft:LinkedInCorporationMember
8	us-gaap:BusinessAcquisitionLineItems (terseLabel)	LineItems	duration		us-gaap:BusinessAcquisitionLineItems
9	us-gaap:BusinessAcquisitionsProFormaRevenue (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:BusinessAcquisitionsProFormaRevenue
10	us-gaap:BusinessAcquisitionsProFormaNetIncomeLoss (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:BusinessAcquisitionsProFormaNetIncomeLoss
11	us-gaap:BusinessAcquisitionProFormaEarningsPerShareDiluted (terseLabel)	Concept (Per-Share)	duration		us-gaap:BusinessAcquisitionProFormaEarningsPerShareDiluted

Model Structure
Network	100800 - Disclosure - Carrying Amount of Goodwill (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureCarryingAmountOfGoodwillDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Goodwill And Intangible Assets Disclosure [Abstract]	Abstract	duration		us-gaap:GoodwillAndIntangibleAssetsDisclosureAbstract
2	us-gaap:ScheduleOfGoodwillTable (terseLabel)	Table	duration		us-gaap:ScheduleOfGoodwillTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:StatementBusinessSegmentsAxis (terseLabel)	Axis	duration		us-gaap:StatementBusinessSegmentsAxis
6	us-gaap:SegmentDomain (terseLabel)	Member	duration		us-gaap:SegmentDomain
7	msft:ProductivityAndBusinessProcessesMember (terseLabel)	Member	duration		msft:ProductivityAndBusinessProcessesMember
8	msft:IntelligentCloudMember (terseLabel)	Member	duration		msft:IntelligentCloudMember
9	msft:MorePersonalComputingMember (terseLabel)	Member	duration		msft:MorePersonalComputingMember
10	us-gaap:GoodwillLineItems (terseLabel)	LineItems	duration		us-gaap:GoodwillLineItems
11	us-gaap:Goodwill (periodStartLabel)	Concept (Monetary)	instant	debit	us-gaap:Goodwill
12	us-gaap:GoodwillAcquiredDuringPeriod (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:GoodwillAcquiredDuringPeriod
13	us-gaap:GoodwillOtherIncreaseDecrease (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:GoodwillOtherIncreaseDecrease
14	Ending Balance	Concept (Monetary)	instant	debit	us-gaap:Goodwill

Model Structure
Network	100810 - Disclosure - Goodwill - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureGoodwillAdditionalInformationDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Goodwill And Intangible Assets Disclosure [Abstract]	Abstract	duration		us-gaap:GoodwillAndIntangibleAssetsDisclosureAbstract
2	us-gaap:ScheduleOfGoodwillTable (terseLabel)	Table	duration		us-gaap:ScheduleOfGoodwillTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:StatementBusinessSegmentsAxis (terseLabel)	Axis	duration		us-gaap:StatementBusinessSegmentsAxis
6	us-gaap:SegmentDomain (terseLabel)	Member	duration		us-gaap:SegmentDomain
7	msft:PhoneHardwareMember (terseLabel)	Member	duration		msft:PhoneHardwareMember
8	us-gaap:GoodwillLineItems (terseLabel)	LineItems	duration		us-gaap:GoodwillLineItems
9	us-gaap:GoodwillImpairedAccumulatedImpairmentLoss (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:GoodwillImpairedAccumulatedImpairmentLoss
10	us-gaap:GoodwillImpairmentLoss (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:GoodwillImpairmentLoss

Model Structure
Network	100820 - Disclosure - Finite-Lived Intangible Assets (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureFiniteLivedIntangibleAssetsDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Goodwill And Intangible Assets Disclosure [Abstract]	Abstract	duration		us-gaap:GoodwillAndIntangibleAssetsDisclosureAbstract
2	us-gaap:ScheduleOfFiniteLivedIntangibleAssetsTable (terseLabel)	Table	duration		us-gaap:ScheduleOfFiniteLivedIntangibleAssetsTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:FiniteLivedIntangibleAssetsByMajorClassAxis (terseLabel)	Axis	duration		us-gaap:FiniteLivedIntangibleAssetsByMajorClassAxis
6	us-gaap:FiniteLivedIntangibleAssetsMajorClassNameDomain (terseLabel)	Member	duration		us-gaap:FiniteLivedIntangibleAssetsMajorClassNameDomain
7	us-gaap:TechnologyBasedIntangibleAssetsMember (terseLabel)	Member	duration		us-gaap:TechnologyBasedIntangibleAssetsMember
8	Marketing-related	Member	duration		us-gaap:MarketingRelatedIntangibleAssetsMember
9	us-gaap:ContractualRightsMember (terseLabel)	Member	duration		us-gaap:ContractualRightsMember
10	us-gaap:CustomerRelationshipsMember (terseLabel)	Member	duration		us-gaap:CustomerRelationshipsMember
11	us-gaap:FiniteLivedIntangibleAssetsLineItems (terseLabel)	LineItems	duration		us-gaap:FiniteLivedIntangibleAssetsLineItems
12	us-gaap:FiniteLivedIntangibleAssetsGross (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:FiniteLivedIntangibleAssetsGross
13	us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization (negatedLabel)	Concept (Monetary)	instant	credit	us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
14	Net Carrying Amount	Concept (Monetary)	instant	debit	us-gaap:FiniteLivedIntangibleAssetsNet

Model Structure
Network	100830 - Disclosure - Finite-Lived Intangible Assets (Parenthetical) (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureFiniteLivedIntangibleAssetsParentheticalDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Goodwill And Intangible Assets Disclosure [Abstract]	Abstract	duration		us-gaap:GoodwillAndIntangibleAssetsDisclosureAbstract
2	us-gaap:ScheduleOfFiniteLivedIntangibleAssetsTable (terseLabel)	Table	duration		us-gaap:ScheduleOfFiniteLivedIntangibleAssetsTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:FiniteLivedIntangibleAssetsByMajorClassAxis (terseLabel)	Axis	duration		us-gaap:FiniteLivedIntangibleAssetsByMajorClassAxis
6	us-gaap:FiniteLivedIntangibleAssetsMajorClassNameDomain (terseLabel)	Member	duration		us-gaap:FiniteLivedIntangibleAssetsMajorClassNameDomain
7	us-gaap:TechnologyBasedIntangibleAssetsMember (terseLabel)	Member	duration		us-gaap:TechnologyBasedIntangibleAssetsMember
8	us-gaap:FiniteLivedIntangibleAssetsLineItems (terseLabel)	LineItems	duration		us-gaap:FiniteLivedIntangibleAssetsLineItems
9	us-gaap:CapitalizedSoftwareDevelopmentCostsForSoftwareSoldToCustomers (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:CapitalizedSoftwareDevelopmentCostsForSoftwareSoldToCustomers

Model Structure
Network	100840 - Disclosure - Intangible Assets - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureIntangibleAssetsAdditionalInformationDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Goodwill And Intangible Assets Disclosure [Abstract]	Abstract	duration		us-gaap:GoodwillAndIntangibleAssetsDisclosureAbstract
2	us-gaap:ScheduleOfFiniteLivedIntangibleAssetsTable (terseLabel)	Table	duration		us-gaap:ScheduleOfFiniteLivedIntangibleAssetsTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:StatementBusinessSegmentsAxis (terseLabel)	Axis	duration		us-gaap:StatementBusinessSegmentsAxis
6	us-gaap:SegmentDomain (terseLabel)	Member	duration		us-gaap:SegmentDomain
7	msft:DevicesMember (terseLabel)	Member	duration		msft:DevicesMember
8	msft:PhoneHardwareMember (terseLabel)	Member	duration		msft:PhoneHardwareMember
9	us-gaap:FiniteLivedIntangibleAssetsLineItems (terseLabel)	LineItems	duration		us-gaap:FiniteLivedIntangibleAssetsLineItems
10	us-gaap:ImpairmentOfIntangibleAssetsFinitelived (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:ImpairmentOfIntangibleAssetsFinitelived
11	us-gaap:AmortizationOfIntangibleAssets (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:AmortizationOfIntangibleAssets
12	us-gaap:CapitalizedComputerSoftwareAmortization1 (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:CapitalizedComputerSoftwareAmortization1

Model Structure
Network	100850 - Disclosure - Intangible Assets Acquired (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureIntangibleAssetsAcquiredDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Goodwill And Intangible Assets Disclosure [Abstract]	Abstract	duration		us-gaap:GoodwillAndIntangibleAssetsDisclosureAbstract
2	us-gaap:ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable (terseLabel)	Table	duration		us-gaap:ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:FiniteLivedIntangibleAssetsByMajorClassAxis (terseLabel)	Axis	duration		us-gaap:FiniteLivedIntangibleAssetsByMajorClassAxis
6	us-gaap:FiniteLivedIntangibleAssetsMajorClassNameDomain (terseLabel)	Member	duration		us-gaap:FiniteLivedIntangibleAssetsMajorClassNameDomain
7	us-gaap:CustomerRelationshipsMember (terseLabel)	Member	duration		us-gaap:CustomerRelationshipsMember
8	us-gaap:TechnologyBasedIntangibleAssetsMember (terseLabel)	Member	duration		us-gaap:TechnologyBasedIntangibleAssetsMember
9	Marketing-related	Member	duration		us-gaap:MarketingRelatedIntangibleAssetsMember
10	us-gaap:ContractualRightsMember (terseLabel)	Member	duration		us-gaap:ContractualRightsMember
11	us-gaap:AcquiredFiniteLivedIntangibleAssetsLineItems (terseLabel)	LineItems	duration		us-gaap:AcquiredFiniteLivedIntangibleAssetsLineItems
12	msft:AcquiredFiniteLivedIntangibleAssets (terseLabel)	Concept (Monetary)	duration	debit	msft:AcquiredFiniteLivedIntangibleAssets
13	us-gaap:AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife (terseLabel)	Concept (Duration)	duration		us-gaap:AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife

Model Structure
Network	100860 - Disclosure - Estimated Future Amortization Expense Related to Intangible Assets (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureEstimatedFutureAmortizationExpenseRelatedToIntangibleAssetsDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Goodwill And Intangible Assets Disclosure [Abstract]	Abstract	duration		us-gaap:GoodwillAndIntangibleAssetsDisclosureAbstract
2	us-gaap:ScheduleOfFiniteLivedIntangibleAssetsTable (terseLabel)	Table	duration		us-gaap:ScheduleOfFiniteLivedIntangibleAssetsTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:FiniteLivedIntangibleAssetsLineItems (terseLabel)	LineItems	duration		us-gaap:FiniteLivedIntangibleAssetsLineItems
6	us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
7	us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
8	us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
9	us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
10	us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
11	us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
12	Net Carrying Amount	Concept (Monetary)	instant	debit	us-gaap:FiniteLivedIntangibleAssetsNet

Model Structure
Network	100870 - Disclosure - Debt - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureDebtAdditionalInformationDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Debt Disclosure [Abstract]	Abstract	duration		us-gaap:DebtDisclosureAbstract
2	us-gaap:DebtInstrumentTable (terseLabel)	Table	duration		us-gaap:DebtInstrumentTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:ShortTermDebtTypeAxis (terseLabel)	Axis	duration		us-gaap:ShortTermDebtTypeAxis
6	us-gaap:ShortTermDebtTypeDomain (terseLabel)	Member	duration		us-gaap:ShortTermDebtTypeDomain
7	us-gaap:CommercialPaperMember (terseLabel)	Member	duration		us-gaap:CommercialPaperMember
8	us-gaap:RangeAxis (terseLabel)	Axis	duration		us-gaap:RangeAxis
9	us-gaap:RangeMember (terseLabel)	Member	duration		us-gaap:RangeMember
10	Lower Limit	Member	duration		us-gaap:MinimumMember
11	Upper Limit	Member	duration		us-gaap:MaximumMember
12	us-gaap:DebtInstrumentAxis (terseLabel)	Axis	duration		us-gaap:DebtInstrumentAxis
13	us-gaap:DebtInstrumentNameDomain (terseLabel)	Member	duration		us-gaap:DebtInstrumentNameDomain
14	msft:CreditFacilityExpireOnOctoberThirtyOneTwentySeventeenMember (terseLabel)	Member	duration		msft:CreditFacilityExpireOnOctoberThirtyOneTwentySeventeenMember
15	msft:CreditFacilityExpireOnNovemberFourteenTwentyEighteenMember (terseLabel)	Member	duration		msft:CreditFacilityExpireOnNovemberFourteenTwentyEighteenMember
16	us-gaap:DebtInstrumentLineItems (terseLabel)	LineItems	duration		us-gaap:DebtInstrumentLineItems
17	us-gaap:CommercialPaper (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:CommercialPaper
18	us-gaap:ShortTermDebtWeightedAverageInterestRate (terseLabel)	Concept (Percent)	instant		us-gaap:ShortTermDebtWeightedAverageInterestRate
19	us-gaap:DebtInstrumentTerm (terseLabel)	Concept (Duration)	duration		us-gaap:DebtInstrumentTerm
20	us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity
21	us-gaap:LineOfCreditFacilityExpirationDate1 (terseLabel)	Concept (Date)	duration		us-gaap:LineOfCreditFacilityExpirationDate1
22	us-gaap:LineOfCreditFacilityCovenantCompliance (terseLabel)	Concept (String)	duration		us-gaap:LineOfCreditFacilityCovenantCompliance
23	us-gaap:ProceedsFromLinesOfCredit (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:ProceedsFromLinesOfCredit
24	us-gaap:LongTermDebt (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:LongTermDebt
25	us-gaap:LongTermDebtFairValue (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:LongTermDebtFairValue
26	us-gaap:InterestPaid (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:InterestPaid
27	us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

Model Structure
Network	100880 - Disclosure - Long-term Debt (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureLongTermDebtDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Debt Disclosure [Abstract]	Abstract	duration		us-gaap:DebtDisclosureAbstract
2	us-gaap:DebtInstrumentTable (terseLabel)	Table	duration		us-gaap:DebtInstrumentTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:DebtInstrumentAxis (terseLabel)	Axis	duration		us-gaap:DebtInstrumentAxis
6	us-gaap:DebtInstrumentNameDomain (terseLabel)	Member	duration		us-gaap:DebtInstrumentNameDomain
7	msft:NotesZeroPointEightSevenFivePercentDueNovemberFifteenTwentySeventeenMember (terseLabel)	Member	duration		msft:NotesZeroPointEightSevenFivePercentDueNovemberFifteenTwentySeventeenMember
8	msft:NotesOnePointZeroPercentDueMayOneTwentyEighteenMember (terseLabel)	Member	duration		msft:NotesOnePointZeroPercentDueMayOneTwentyEighteenMember
9	msft:NotesOnePointThreeZeroPercentDueNovemberThreeTwentyEighteenMember (terseLabel)	Member	duration		msft:NotesOnePointThreeZeroPercentDueNovemberThreeTwentyEighteenMember
10	msft:NotesOnePointSixTwoFivePercentDueDecemberSixTwentyEighteenMember (terseLabel)	Member	duration		msft:NotesOnePointSixTwoFivePercentDueDecemberSixTwentyEighteenMember
11	msft:NotesFourPointTwoPercentDueJuneOneTwentyNineteenMember (terseLabel)	Member	duration		msft:NotesFourPointTwoPercentDueJuneOneTwentyNineteenMember
12	msft:NotesOnePointOnePercentDueAugustEightTwentyNineteenMember (terseLabel)	Member	duration		msft:NotesOnePointOnePercentDueAugustEightTwentyNineteenMember
13	msft:NotesZeroPointFivePercentDueNovemberOneTwentyNineteenMember (terseLabel)	Member	duration		msft:NotesZeroPointFivePercentDueNovemberOneTwentyNineteenMember
14	msft:NotesOnePointEightFivePercentDueFebruarySixTwentyTwentyMember (terseLabel)	Member	duration		msft:NotesOnePointEightFivePercentDueFebruarySixTwentyTwentyMember
15	msft:NotesOnePointEightFivePercentDueFebruaryTwelveTwentyTwentyMember (terseLabel)	Member	duration		msft:NotesOnePointEightFivePercentDueFebruaryTwelveTwentyTwentyMember
16	msft:NotesThreePointZeroPercentDueOctoberOneTwentyTwentyMember (terseLabel)	Member	duration		msft:NotesThreePointZeroPercentDueOctoberOneTwentyTwentyMember
17	msft:NotesTwoPointZeroPercentDueNovemberThreeTwentyTwentyMember (terseLabel)	Member	duration		msft:NotesTwoPointZeroPercentDueNovemberThreeTwentyTwentyMember
18	msft:NotesFourPointZeroPercentDueFebruaryEightTwentyTwentyOneMember (terseLabel)	Member	duration		msft:NotesFourPointZeroPercentDueFebruaryEightTwentyTwentyOneMember
19	msft:NotesOnePointFiveFivePercentDueAugustEightTwentyTwentyOneMember (terseLabel)	Member	duration		msft:NotesOnePointFiveFivePercentDueAugustEightTwentyTwentyOneMember
20	msft:NotesTwoPointOneTwoFivePercentDueDecemberSixTwentyTwentyOneMember (terseLabel)	Member	duration		msft:NotesTwoPointOneTwoFivePercentDueDecemberSixTwentyTwentyOneMember
21	msft:NotesTwoPointFourPercentDueFebruarySixTwentyTwentyTwoMember (terseLabel)	Member	duration		msft:NotesTwoPointFourPercentDueFebruarySixTwentyTwentyTwoMember
22	msft:NotesTwoPointThreeSevenFivePercentDueFebruaryTwelveTwentyTwentyTwoMember (terseLabel)	Member	duration		msft:NotesTwoPointThreeSevenFivePercentDueFebruaryTwelveTwentyTwentyTwoMember
23	msft:NotesTwoPointSixFivePercentDueNovemberThreeTwentyTwentyTwoMember (terseLabel)	Member	duration		msft:NotesTwoPointSixFivePercentDueNovemberThreeTwentyTwentyTwoMember
24	msft:NotesTwoPointOneTwoFivePercentDueNovemberFifteenTwentyTwentyTwoMember (terseLabel)	Member	duration		msft:NotesTwoPointOneTwoFivePercentDueNovemberFifteenTwentyTwentyTwoMember
25	msft:NotesTwoPointThreeSevenFivePercentDueMayOneTwentyTwentyThreeMember (terseLabel)	Member	duration		msft:NotesTwoPointThreeSevenFivePercentDueMayOneTwentyTwentyThreeMember
26	msft:NotesTwoPointZeroPercentDueAugustEightTwentyTwentyThreeMember (terseLabel)	Member	duration		msft:NotesTwoPointZeroPercentDueAugustEightTwentyTwentyThreeMember
27	msft:NotesThreePointSixTwoFivePercentDueDecemberFifteenTwentyTwentyThreeMember (terseLabel)	Member	duration		msft:NotesThreePointSixTwoFivePercentDueDecemberFifteenTwentyTwentyThreeMember
28	msft:NotesTwoPointEightSevenFivePercentDueFebruarySixTwentyTwentyFourMember (terseLabel)	Member	duration		msft:NotesTwoPointEightSevenFivePercentDueFebruarySixTwentyTwentyFourMember
29	msft:NotesTwoPointSevenPercentDueFebruaryTwelveTwentyTwentyFiveMember (terseLabel)	Member	duration		msft:NotesTwoPointSevenPercentDueFebruaryTwelveTwentyTwentyFiveMember
30	msft:NotesThreePointOneTwoFivePercentDueNovemberThreeTwentyTwentyFiveMember (terseLabel)	Member	duration		msft:NotesThreePointOneTwoFivePercentDueNovemberThreeTwentyTwentyFiveMember
31	msft:NotesTwoPointFourPercentDueAugustEightTwentyTwentySixMember (terseLabel)	Member	duration		msft:NotesTwoPointFourPercentDueAugustEightTwentyTwentySixMember
32	msft:NotesThreePointThreePercentDueFebruarySixTwentyTwentySevenMember (terseLabel)	Member	duration		msft:NotesThreePointThreePercentDueFebruarySixTwentyTwentySevenMember
33	msft:NotesThreePointOneTwoFivePercentDueDecemberSixTwentyTwentyEightMember (terseLabel)	Member	duration		msft:NotesThreePointOneTwoFivePercentDueDecemberSixTwentyTwentyEightMember
34	msft:NotesTwoPointSixTwoFivePercentDueMayTwoTwentyThirtyThreeMember (terseLabel)	Member	duration		msft:NotesTwoPointSixTwoFivePercentDueMayTwoTwentyThirtyThreeMember
35	msft:NotesThreePointFivePercentDueFebruaryTwelveTwentyThirtyFiveMember (terseLabel)	Member	duration		msft:NotesThreePointFivePercentDueFebruaryTwelveTwentyThirtyFiveMember
36	msft:NotesFourPointTwoPercentDueNovemberThreeTwentyThirtyFiveMember (terseLabel)	Member	duration		msft:NotesFourPointTwoPercentDueNovemberThreeTwentyThirtyFiveMember
37	msft:NotesThreePointFourFivePercentDueAugustEightTwentyThirtySixMember (terseLabel)	Member	duration		msft:NotesThreePointFourFivePercentDueAugustEightTwentyThirtySixMember
38	msft:NotesFourPointOnePercentDueFebruarySixTwentyThirtySevenMember (terseLabel)	Member	duration		msft:NotesFourPointOnePercentDueFebruarySixTwentyThirtySevenMember
39	msft:NotesFivePointTwoPercentDueJuneOneTwentyThirtyNineMember (terseLabel)	Member	duration		msft:NotesFivePointTwoPercentDueJuneOneTwentyThirtyNineMember
40	msft:NotesFourPointFivePercentDueOctoberOneTwentyFortyMember (terseLabel)	Member	duration		msft:NotesFourPointFivePercentDueOctoberOneTwentyFortyMember
41	msft:NotesFivePointThreePercentDueFebruaryEightTwentyFortyOneMember (terseLabel)	Member	duration		msft:NotesFivePointThreePercentDueFebruaryEightTwentyFortyOneMember
42	msft:NotesThreePointFivePercentDueNovemberFifteenTwentyFortyTwoMember (terseLabel)	Member	duration		msft:NotesThreePointFivePercentDueNovemberFifteenTwentyFortyTwoMember
43	msft:NotesThreePointSevenFivePercentDueMayOneTwentyFortyThreeMember (terseLabel)	Member	duration		msft:NotesThreePointSevenFivePercentDueMayOneTwentyFortyThreeMember
44	msft:NotesFourPointEightSevenFivePercentDueDecemberFifteenTwentyFortyThreeMember (terseLabel)	Member	duration		msft:NotesFourPointEightSevenFivePercentDueDecemberFifteenTwentyFortyThreeMember
45	msft:NotesThreePointSevenFivePercentDueFebruaryTwelveTwentyFortyFiveMember (terseLabel)	Member	duration		msft:NotesThreePointSevenFivePercentDueFebruaryTwelveTwentyFortyFiveMember
46	msft:NotesFourPointFourFivePercentDueNovemberThreeTwentyFortyFiveMember (terseLabel)	Member	duration		msft:NotesFourPointFourFivePercentDueNovemberThreeTwentyFortyFiveMember
47	msft:NotesThreePointSevenPercentDueAugustEightTwentyFortySixMember (terseLabel)	Member	duration		msft:NotesThreePointSevenPercentDueAugustEightTwentyFortySixMember
48	msft:NotesFourPointTwoFivePercentDueFebruarySixTwentyFortySevenMember (terseLabel)	Member	duration		msft:NotesFourPointTwoFivePercentDueFebruarySixTwentyFortySevenMember
49	msft:NotesFourPercentDueFebruaryTwelveTwentyFiftyFiveMember (terseLabel)	Member	duration		msft:NotesFourPercentDueFebruaryTwelveTwentyFiftyFiveMember
50	msft:NotesFourPointSevenFivePercentDueNovemberThreeTwentyFiftyFiveMember (terseLabel)	Member	duration		msft:NotesFourPointSevenFivePercentDueNovemberThreeTwentyFiftyFiveMember
51	msft:NotesThreePointNineFivePercentDueAugustEightTwentyFiftySixMember (terseLabel)	Member	duration		msft:NotesThreePointNineFivePercentDueAugustEightTwentyFiftySixMember
52	msft:NotesFourPointFivePercentDueFebruarySixTwentyFiftySevenMember (terseLabel)	Member	duration		msft:NotesFourPointFivePercentDueFebruarySixTwentyFiftySevenMember
53	us-gaap:DebtInstrumentLineItems (terseLabel)	LineItems	duration		us-gaap:DebtInstrumentLineItems
54	us-gaap:DebtInstrumentMaturityDate (terseLabel)	Concept (Date)	duration		us-gaap:DebtInstrumentMaturityDate
55	us-gaap:DebtInstrumentFaceAmount (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:DebtInstrumentFaceAmount
56	us-gaap:DebtInstrumentInterestRateStatedPercentage (terseLabel)	Concept (Percent)	instant		us-gaap:DebtInstrumentInterestRateStatedPercentage
57	us-gaap:DebtInstrumentInterestRateEffectivePercentage (terseLabel)	Concept (Percent)	instant		us-gaap:DebtInstrumentInterestRateEffectivePercentage

Model Structure
Network	100890 - Disclosure - Long-term Debt (Parenthetical) (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureLongTermDebtParentheticalDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Debt Disclosure [Abstract]	Abstract	duration		us-gaap:DebtDisclosureAbstract
2	us-gaap:DebtInstrumentTable (terseLabel)	Table	duration		us-gaap:DebtInstrumentTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:DebtInstrumentAxis (terseLabel)	Axis	duration		us-gaap:DebtInstrumentAxis
6	us-gaap:DebtInstrumentNameDomain (terseLabel)	Member	duration		us-gaap:DebtInstrumentNameDomain
7	msft:USDDebtIssuedInPeriodMember (terseLabel)	Member	duration		msft:USDDebtIssuedInPeriodMember
8	us-gaap:DebtInstrumentLineItems (terseLabel)	LineItems	duration		us-gaap:DebtInstrumentLineItems
9	us-gaap:DebtInstrumentFaceAmount (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:DebtInstrumentFaceAmount

Model Structure
Network	100900 - Disclosure - Maturities of Long-term Debt (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureMaturitiesOfLongTermDebtDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Debt Disclosure [Abstract]	Abstract	duration		us-gaap:DebtDisclosureAbstract
2	us-gaap:DebtInstrumentTable (terseLabel)	Table	duration		us-gaap:DebtInstrumentTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:DebtInstrumentLineItems (terseLabel)	LineItems	duration		us-gaap:DebtInstrumentLineItems
6	us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
7	us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
8	us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
9	us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
10	us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
11	us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
12	Total	Concept (Monetary)	instant	credit	us-gaap:DebtInstrumentFaceAmount

Model Structure
Network	100910 - Disclosure - Provision for Income Taxes (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureProvisionForIncomeTaxesDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Income Tax Disclosure [Abstract]	Abstract	duration		us-gaap:IncomeTaxDisclosureAbstract
2	msft:ReconciliationOfProvisionOfIncomeTaxesTable (terseLabel)	Table	duration		msft:ReconciliationOfProvisionOfIncomeTaxesTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	msft:ReconciliationOfProvisionOfIncomeTaxesLineItems (terseLabel)	LineItems	duration		msft:ReconciliationOfProvisionOfIncomeTaxesLineItems
6	us-gaap:CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract (terseLabel)	Abstract	duration		us-gaap:CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract
7	us-gaap:CurrentFederalTaxExpenseBenefit (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:CurrentFederalTaxExpenseBenefit
8	us-gaap:CurrentStateAndLocalTaxExpenseBenefit (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:CurrentStateAndLocalTaxExpenseBenefit
9	us-gaap:CurrentForeignTaxExpenseBenefit (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:CurrentForeignTaxExpenseBenefit
10	us-gaap:CurrentIncomeTaxExpenseBenefit (totalLabel)	Concept (Monetary)	duration	debit	us-gaap:CurrentIncomeTaxExpenseBenefit
11	us-gaap:DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract (terseLabel)	Abstract	duration		us-gaap:DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract
12	Deferred taxes	Concept (Monetary)	duration	debit	us-gaap:DeferredIncomeTaxExpenseBenefit
13	Provision for income taxes	Concept (Monetary)	duration	debit	us-gaap:IncomeTaxExpenseBenefit

Model Structure
Network	100920 - Disclosure - Income Taxes - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Income Tax Disclosure [Abstract]	Abstract	duration		us-gaap:IncomeTaxDisclosureAbstract
2	msft:IncomeTaxesTable (terseLabel)	Table	duration		msft:IncomeTaxesTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:StatementBusinessSegmentsAxis (terseLabel)	Axis	duration		us-gaap:StatementBusinessSegmentsAxis
6	us-gaap:SegmentDomain (terseLabel)	Member	duration		us-gaap:SegmentDomain
7	msft:PhoneBusinessMember (terseLabel)	Member	duration		msft:PhoneBusinessMember
8	us-gaap:IncomeStatementLocationAxis (terseLabel)	Axis	duration		us-gaap:IncomeStatementLocationAxis
9	us-gaap:IncomeStatementLocationDomain (terseLabel)	Member	duration		us-gaap:IncomeStatementLocationDomain
10	msft:ImpairmentIntegrationAndRestructuringExpensesMember (terseLabel)	Member	duration		msft:ImpairmentIntegrationAndRestructuringExpensesMember
11	us-gaap:DeferredRevenueArrangementTypeAxis (terseLabel)	Axis	duration		us-gaap:DeferredRevenueArrangementTypeAxis
12	us-gaap:DeferredRevenueArrangementTypeDomain (terseLabel)	Member	duration		us-gaap:DeferredRevenueArrangementTypeDomain
13	msft:WindowsTenDeferralMember (terseLabel)	Member	duration		msft:WindowsTenDeferralMember
14	us-gaap:IncomeTaxAuthorityAxis (terseLabel)	Axis	duration		us-gaap:IncomeTaxAuthorityAxis
15	us-gaap:IncomeTaxAuthorityDomain (terseLabel)	Member	duration		us-gaap:IncomeTaxAuthorityDomain
16	msft:RegionalOperatingCentersMember (terseLabel)	Member	duration		msft:RegionalOperatingCentersMember
17	us-gaap:ForeignCountryMember (terseLabel)	Member	duration		us-gaap:ForeignCountryMember
18	us-gaap:StatementScenarioAxis (terseLabel)	Axis	duration		us-gaap:StatementScenarioAxis
19	us-gaap:ScenarioUnspecifiedDomain (terseLabel)	Member	duration		us-gaap:ScenarioUnspecifiedDomain
20	us-gaap:RestatementAdjustmentMember (terseLabel)	Member	duration		us-gaap:RestatementAdjustmentMember
21	msft:IncomeTaxesLineItems (terseLabel)	LineItems	duration		msft:IncomeTaxesLineItems
22	us-gaap:DeferredFederalStateAndLocalTaxExpenseBenefit (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:DeferredFederalStateAndLocalTaxExpenseBenefit
23	us-gaap:DeferredForeignIncomeTaxExpenseBenefit (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:DeferredForeignIncomeTaxExpenseBenefit
24	U.S. income (loss) before income taxes	Concept (Monetary)	duration	credit	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
25	Foreign income (loss) before income taxes	Concept (Monetary)	duration	credit	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
26	msft:ForeignEarningsTaxedAtRatesLowerThanUsRate (terseLabel)	Concept (Percent)	duration		msft:ForeignEarningsTaxedAtRatesLowerThanUsRate
27	Deferred income tax assets, loss carryforward	Concept (Monetary)	instant	debit	us-gaap:DeferredTaxAssetsOperatingLossCarryforwards
28	Deferred income tax assets, valuation allowance	Concept (Monetary)	instant	credit	us-gaap:DeferredTaxAssetsValuationAllowance
29	us-gaap:OperatingLossCarryforwards (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:OperatingLossCarryforwards
30	us-gaap:UndistributedEarningsOfForeignSubsidiaries (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:UndistributedEarningsOfForeignSubsidiaries
31	us-gaap:DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries
32	us-gaap:IncomeTaxesPaidNet (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:IncomeTaxesPaidNet
33	us-gaap:AccruedIncomeTaxesNoncurrent (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:AccruedIncomeTaxesNoncurrent
34	us-gaap:UnrecognizedTaxBenefits (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:UnrecognizedTaxBenefits
35	us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
36	us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued
37	us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense

Model Structure
Network	100930 - Disclosure - Income (Loss) Before Income Taxes (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureIncomeLossBeforeIncomeTaxesDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Income Tax Disclosure [Abstract]	Abstract	duration		us-gaap:IncomeTaxDisclosureAbstract
2	msft:ScheduleOfComponentsOfIncomeBeforeIncomeTaxExpenseBenefitTable (terseLabel)	Table	duration		msft:ScheduleOfComponentsOfIncomeBeforeIncomeTaxExpenseBenefitTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	msft:ScheduleOfComponentsOfIncomeBeforeIncomeTaxExpenseBenefitLineItems (terseLabel)	LineItems	duration		msft:ScheduleOfComponentsOfIncomeBeforeIncomeTaxExpenseBenefitLineItems
6	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
7	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
8	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments (totalLabel)	Concept (Monetary)	duration	credit	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

Model Structure
Network	100940 - Disclosure - Difference Between Income Taxes Computed at Federal Statutory Rate and Provision for Income Taxes (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureDifferenceBetweenIncomeTaxesComputedAtFederalStatutoryRateAndProvisionForIncomeTaxesDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Income Tax Disclosure [Abstract]	Abstract	duration	us-gaap:IncomeTaxDisclosureAbstract
2	msft:ReconciliationOfStatutoryFederalTaxRateTable (terseLabel)	Table	duration	msft:ReconciliationOfStatutoryFederalTaxRateTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	msft:ReconciliationOfStatutoryFederalTaxRateLineItems (terseLabel)	LineItems	duration	msft:ReconciliationOfStatutoryFederalTaxRateLineItems
6	us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate (terseLabel)	Concept (Percent)	duration	us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
7	us-gaap:EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract (terseLabel)	Abstract	duration	us-gaap:EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract
8	us-gaap:EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential (terseLabel)	Concept (Percent)	duration	us-gaap:EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
9	msft:EffectiveIncomeTaxRateReconciliationPhoneBusinessGainsLosses (terseLabel)	Concept (Percent)	duration	msft:EffectiveIncomeTaxRateReconciliationPhoneBusinessGainsLosses
10	msft:EffectiveIncomeTaxRateReconciliationDeductionsExcessTaxBenefitsStockBasedCompensation (negatedLabel)	Concept (Percent)	duration	msft:EffectiveIncomeTaxRateReconciliationDeductionsExcessTaxBenefitsStockBasedCompensation
11	us-gaap:EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities (negatedLabel)	Concept (Percent)	duration	us-gaap:EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities
12	msft:EffectiveIncomeTaxRateReconciliationInterestIncomeExpense (terseLabel)	Concept (Percent)	duration	msft:EffectiveIncomeTaxRateReconciliationInterestIncomeExpense
13	us-gaap:EffectiveIncomeTaxRateReconciliationOtherAdjustments (terseLabel)	Concept (Percent)	duration	us-gaap:EffectiveIncomeTaxRateReconciliationOtherAdjustments
14	us-gaap:EffectiveIncomeTaxRateContinuingOperations (totalLabel)	Concept (Percent)	duration	us-gaap:EffectiveIncomeTaxRateContinuingOperations

Model Structure
Network	100950 - Disclosure - Deferred Income Tax Assets and Liabilities (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureDeferredIncomeTaxAssetsAndLiabilitiesDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Income Tax Disclosure [Abstract]	Abstract	duration		us-gaap:IncomeTaxDisclosureAbstract
2	msft:ScheduleOfDeferredIncomeTaxAssetsAndLiabilitiesTable (terseLabel)	Table	duration		msft:ScheduleOfDeferredIncomeTaxAssetsAndLiabilitiesTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:BalanceSheetLocationAxis (terseLabel)	Axis	duration		us-gaap:BalanceSheetLocationAxis
6	us-gaap:BalanceSheetLocationDomain (terseLabel)	Member	duration		us-gaap:BalanceSheetLocationDomain
7	us-gaap:OtherNoncurrentAssetsMember (terseLabel)	Member	duration		us-gaap:OtherNoncurrentAssetsMember
8	msft:DeferredIncomeTaxLiabilitiesNoncurrentMember (terseLabel)	Member	duration		msft:DeferredIncomeTaxLiabilitiesNoncurrentMember
9	msft:ScheduleOfDeferredIncomeTaxAssetsAndLiabilitiesLineItems (terseLabel)	LineItems	duration		msft:ScheduleOfDeferredIncomeTaxAssetsAndLiabilitiesLineItems
10	us-gaap:DeferredTaxAssetsNetAbstract (terseLabel)	Abstract	duration		us-gaap:DeferredTaxAssetsNetAbstract
11	us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
12	us-gaap:DeferredTaxAssetsTaxDeferredExpenseOther (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:DeferredTaxAssetsTaxDeferredExpenseOther
13	us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsRestructuringCharges (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsRestructuringCharges
14	us-gaap:DeferredTaxAssetsDeferredIncome (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:DeferredTaxAssetsDeferredIncome
15	us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses
16	us-gaap:DeferredTaxAssetsOperatingLossCarryforwards (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:DeferredTaxAssetsOperatingLossCarryforwards
17	msft:DeferredTaxAssetsDepreciationAndAmortization (terseLabel)	Concept (Monetary)	instant	debit	msft:DeferredTaxAssetsDepreciationAndAmortization
18	us-gaap:DeferredTaxAssetsOther (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:DeferredTaxAssetsOther
19	us-gaap:DeferredTaxAssetsGross (totalLabel)	Concept (Monetary)	instant	debit	us-gaap:DeferredTaxAssetsGross
20	us-gaap:DeferredTaxAssetsValuationAllowance (negatedLabel)	Concept (Monetary)	instant	credit	us-gaap:DeferredTaxAssetsValuationAllowance
21	us-gaap:DeferredTaxAssetsNet (totalLabel)	Concept (Monetary)	instant	debit	us-gaap:DeferredTaxAssetsNet
22	us-gaap:DeferredTaxLiabilitiesAbstract (terseLabel)	Abstract	duration		us-gaap:DeferredTaxLiabilitiesAbstract
23	us-gaap:DeferredTaxLiabilitiesUndistributedForeignEarnings (negatedLabel)	Concept (Monetary)	instant	credit	us-gaap:DeferredTaxLiabilitiesUndistributedForeignEarnings
24	msft:DeferredTaxLiabilitiesUnrealizedGainsInvestmentsAndDebt (negatedLabel)	Concept (Monetary)	instant	credit	msft:DeferredTaxLiabilitiesUnrealizedGainsInvestmentsAndDebt
25	msft:DeferredTaxLiabilitiesDepreciationAndAmortization (negatedLabel)	Concept (Monetary)	instant	credit	msft:DeferredTaxLiabilitiesDepreciationAndAmortization
26	us-gaap:DeferredTaxLiabilitiesOther (negatedLabel)	Concept (Monetary)	instant	credit	us-gaap:DeferredTaxLiabilitiesOther
27	us-gaap:DeferredIncomeTaxLiabilities (negatedTotalLabel)	Concept (Monetary)	instant	credit	us-gaap:DeferredIncomeTaxLiabilities
28	us-gaap:DeferredTaxAssetsLiabilitiesNet (totalLabel)	Concept (Monetary)	instant	debit	us-gaap:DeferredTaxAssetsLiabilitiesNet
29	us-gaap:DeferredTaxLiabilities (negatedTotalLabel)	Concept (Monetary)	instant	credit	us-gaap:DeferredTaxLiabilities

Model Structure
Network	100960 - Disclosure - Changes in Unrecognized Tax Benefits (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureChangesInUnrecognizedTaxBenefitsDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Income Tax Disclosure [Abstract]	Abstract	duration		us-gaap:IncomeTaxDisclosureAbstract
2	us-gaap:IncomeTaxContingencyTable (terseLabel)	Table	duration		us-gaap:IncomeTaxContingencyTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:IncomeTaxContingencyLineItems (terseLabel)	LineItems	duration		us-gaap:IncomeTaxContingencyLineItems
6	us-gaap:UnrecognizedTaxBenefits (periodStartLabel)	Concept (Monetary)	instant	credit	us-gaap:UnrecognizedTaxBenefits
7	us-gaap:UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities (negatedLabel)	Concept (Monetary)	duration	debit	us-gaap:UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
8	us-gaap:UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
9	us-gaap:UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions
10	us-gaap:UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions (negatedLabel)	Concept (Monetary)	duration	debit	us-gaap:UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
11	us-gaap:UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations (negatedLabel)	Concept (Monetary)	duration	debit	us-gaap:UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations
12	Balance, end of year	Concept (Monetary)	instant	credit	us-gaap:UnrecognizedTaxBenefits

Model Structure
Network	100970 - Disclosure - Income Taxes - Additional Information Regarding Examinations (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationRegardingExaminationsDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Income Tax Disclosure [Abstract]	Abstract	duration	us-gaap:IncomeTaxDisclosureAbstract
2	us-gaap:IncomeTaxExaminationTable (terseLabel)	Table	duration	us-gaap:IncomeTaxExaminationTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:IncomeTaxAuthorityNameAxis (terseLabel)	Axis	duration	us-gaap:IncomeTaxAuthorityNameAxis
6	us-gaap:IncomeTaxAuthorityNameDomain (terseLabel)	Member	duration	us-gaap:IncomeTaxAuthorityNameDomain
7	us-gaap:InternalRevenueServiceIRSMember (terseLabel)	Member	duration	us-gaap:InternalRevenueServiceIRSMember
8	us-gaap:TaxPeriodAxis (terseLabel)	Axis	duration	us-gaap:TaxPeriodAxis
9	us-gaap:TaxPeriodDomain (terseLabel)	Member	duration	us-gaap:TaxPeriodDomain
10	us-gaap:EarliestTaxYearMember (terseLabel)	Member	duration	us-gaap:EarliestTaxYearMember
11	us-gaap:LatestTaxYearMember (terseLabel)	Member	duration	us-gaap:LatestTaxYearMember
12	us-gaap:IncomeTaxAuthorityAxis (terseLabel)	Axis	duration	us-gaap:IncomeTaxAuthorityAxis
13	us-gaap:IncomeTaxAuthorityDomain (terseLabel)	Member	duration	us-gaap:IncomeTaxAuthorityDomain
14	us-gaap:ForeignCountryMember (terseLabel)	Member	duration	us-gaap:ForeignCountryMember
15	us-gaap:IncomeTaxExaminationLineItems (terseLabel)	LineItems	duration	us-gaap:IncomeTaxExaminationLineItems
16	us-gaap:IncomeTaxExaminationYearUnderExamination (terseLabel)	Concept (gYear)	duration	us-gaap:IncomeTaxExaminationYearUnderExamination
17	us-gaap:OpenTaxYear (terseLabel)	Concept (gYear)	duration	us-gaap:OpenTaxYear

Model Structure
Network	100980 - Disclosure - Restructuring Charges - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureRestructuringChargesAdditionalInformationDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Restructuring And Related Activities [Abstract]	Abstract	duration		us-gaap:RestructuringAndRelatedActivitiesAbstract
2	us-gaap:ScheduleOfRestructuringAndRelatedCostsTable (terseLabel)	Table	duration		us-gaap:ScheduleOfRestructuringAndRelatedCostsTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:RestructuringPlanAxis (terseLabel)	Axis	duration		us-gaap:RestructuringPlanAxis
6	us-gaap:RestructuringPlanDomain (terseLabel)	Member	duration		us-gaap:RestructuringPlanDomain
7	msft:PhoneHardwareRestructuringPlanMember (terseLabel)	Member	duration		msft:PhoneHardwareRestructuringPlanMember
8	msft:TwentySixteenRestructuringPlanMember (terseLabel)	Member	duration		msft:TwentySixteenRestructuringPlanMember
9	msft:TwentySeventeenRestructuringPlanMember (terseLabel)	Member	duration		msft:TwentySeventeenRestructuringPlanMember
10	us-gaap:RestructuringCostAndReserveAxis (terseLabel)	Axis	duration		us-gaap:RestructuringCostAndReserveAxis
11	us-gaap:TypeOfRestructuringDomain (terseLabel)	Member	duration		us-gaap:TypeOfRestructuringDomain
12	us-gaap:EmployeeSeveranceMember (terseLabel)	Member	duration		us-gaap:EmployeeSeveranceMember
13	us-gaap:RestructuringCostAndReserveLineItems (terseLabel)	LineItems	duration		us-gaap:RestructuringCostAndReserveLineItems
14	us-gaap:RestructuringAndRelatedCostNumberOfPositionsEliminated (terseLabel)	Concept (Integer)	duration		us-gaap:RestructuringAndRelatedCostNumberOfPositionsEliminated
15	us-gaap:RestructuringCharges (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:RestructuringCharges
16	us-gaap:RestructuringReserveAccrualAdjustment1 (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:RestructuringReserveAccrualAdjustment1
17	us-gaap:RestructuringAndRelatedActivitiesCompletionDate (terseLabel)	Concept (Date)	duration		us-gaap:RestructuringAndRelatedActivitiesCompletionDate

Model Structure
Network	100990 - Disclosure - Changes in Restructuring Liability (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureChangesInRestructuringLiabilityDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Restructuring And Related Activities [Abstract]	Abstract	duration		us-gaap:RestructuringAndRelatedActivitiesAbstract
2	us-gaap:ScheduleOfRestructuringAndRelatedCostsTable (terseLabel)	Table	duration		us-gaap:ScheduleOfRestructuringAndRelatedCostsTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:RestructuringCostAndReserveAxis (terseLabel)	Axis	duration		us-gaap:RestructuringCostAndReserveAxis
6	us-gaap:TypeOfRestructuringDomain (terseLabel)	Member	duration		us-gaap:TypeOfRestructuringDomain
7	us-gaap:EmployeeSeveranceMember (terseLabel)	Member	duration		us-gaap:EmployeeSeveranceMember
8	us-gaap:OtherRestructuringMember (terseLabel)	Member	duration		us-gaap:OtherRestructuringMember
9	us-gaap:RestructuringCostAndReserveLineItems (terseLabel)	LineItems	duration		us-gaap:RestructuringCostAndReserveLineItems
10	us-gaap:RestructuringReserve (periodStartLabel)	Concept (Monetary)	instant	credit	us-gaap:RestructuringReserve
11	us-gaap:RestructuringCharges (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:RestructuringCharges
12	us-gaap:PaymentsForRestructuring (negatedLabel)	Concept (Monetary)	duration	credit	us-gaap:PaymentsForRestructuring
13	us-gaap:RestructuringReserveSettledWithoutCash2 (negatedLabel)	Concept (Monetary)	duration	debit	us-gaap:RestructuringReserveSettledWithoutCash2
14	Balance, as of June 30, 2017	Concept (Monetary)	instant	credit	us-gaap:RestructuringReserve

Model Structure
Network	101000 - Disclosure - Unearned Revenue by Segment (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureUnearnedRevenueBySegmentDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Deferred Revenue Disclosure [Abstract]	Abstract	duration		us-gaap:DeferredRevenueDisclosureAbstract
2	us-gaap:DeferredRevenueArrangementByTypeTable (terseLabel)	Table	duration		us-gaap:DeferredRevenueArrangementByTypeTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:ConsolidationItemsAxis (terseLabel)	Axis	duration		us-gaap:ConsolidationItemsAxis
6	us-gaap:ConsolidationItemsDomain (terseLabel)	Member	duration		us-gaap:ConsolidationItemsDomain
7	us-gaap:OperatingSegmentsMember (terseLabel)	Member	duration		us-gaap:OperatingSegmentsMember
8	msft:CorporateAndReconcilingItemsMember (terseLabel)	Member	duration		msft:CorporateAndReconcilingItemsMember
9	us-gaap:StatementBusinessSegmentsAxis (terseLabel)	Axis	duration		us-gaap:StatementBusinessSegmentsAxis
10	us-gaap:SegmentDomain (terseLabel)	Member	duration		us-gaap:SegmentDomain
11	msft:ProductivityAndBusinessProcessesMember (terseLabel)	Member	duration		msft:ProductivityAndBusinessProcessesMember
12	msft:IntelligentCloudMember (terseLabel)	Member	duration		msft:IntelligentCloudMember
13	msft:MorePersonalComputingMember (terseLabel)	Member	duration		msft:MorePersonalComputingMember
14	us-gaap:DeferredRevenueArrangementLineItems (terseLabel)	LineItems	duration		us-gaap:DeferredRevenueArrangementLineItems
15	us-gaap:DeferredRevenue (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:DeferredRevenue

Model Structure
Network	101010 - Disclosure - Commitments - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureCommitmentsAdditionalInformationDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Commitments And Contingencies Disclosure [Abstract]	Abstract	duration		us-gaap:CommitmentsAndContingenciesDisclosureAbstract
2	msft:CommitmentsTable (terseLabel)	Table	duration		msft:CommitmentsTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis (terseLabel)	Axis	duration		us-gaap:LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis
6	us-gaap:LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain (terseLabel)	Member	duration		us-gaap:LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain
7	msft:BuildingBuildingImprovementsAndLeaseholdImprovementsMember (terseLabel)	Member	duration		msft:BuildingBuildingImprovementsAndLeaseholdImprovementsMember
8	us-gaap:PropertySubjectToOrAvailableForOperatingLeaseAxis (terseLabel)	Axis	duration		us-gaap:PropertySubjectToOrAvailableForOperatingLeaseAxis
9	us-gaap:PropertySubjectToOrAvailableForOperatingLeaseDomain (terseLabel)	Member	duration		us-gaap:PropertySubjectToOrAvailableForOperatingLeaseDomain
10	us-gaap:BuildingMember (terseLabel)	Member	duration		us-gaap:BuildingMember
11	us-gaap:BalanceSheetLocationAxis (terseLabel)	Axis	duration		us-gaap:BalanceSheetLocationAxis
12	us-gaap:BalanceSheetLocationDomain (terseLabel)	Member	duration		us-gaap:BalanceSheetLocationDomain
13	us-gaap:OtherCurrentLiabilitiesMember (terseLabel)	Member	duration		us-gaap:OtherCurrentLiabilitiesMember
14	us-gaap:OtherNoncurrentLiabilitiesMember (terseLabel)	Member	duration		us-gaap:OtherNoncurrentLiabilitiesMember
15	us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis (terseLabel)	Axis	duration		us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
16	us-gaap:UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain (terseLabel)	Member	duration		us-gaap:UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain
17	msft:CapitalLeaseMember (terseLabel)	Member	duration		msft:CapitalLeaseMember
18	msft:CommitmentsLineItems (terseLabel)	LineItems	duration		msft:CommitmentsLineItems
19	us-gaap:CommitmentsFairValueDisclosure (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:CommitmentsFairValueDisclosure
20	us-gaap:LeaseAndRentalExpense (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:LeaseAndRentalExpense
21	us-gaap:CapitalLeaseObligationsCurrent (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:CapitalLeaseObligationsCurrent
22	us-gaap:CapitalLeaseObligationsNoncurrent (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:CapitalLeaseObligationsNoncurrent
23	us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount

Model Structure
Network	101020 - Disclosure - Future Minimum Rental Commitments Under Non-cancellable Operating Leases (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureFutureMinimumRentalCommitmentsUnderNonCancellableOperatingLeasesDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Commitments And Contingencies Disclosure [Abstract]	Abstract	duration		us-gaap:CommitmentsAndContingenciesDisclosureAbstract
2	us-gaap:ScheduleOfOperatingLeasedAssetsTable (terseLabel)	Table	duration		us-gaap:ScheduleOfOperatingLeasedAssetsTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:PropertyPlantAndEquipmentByTypeAxis (terseLabel)	Axis	duration		us-gaap:PropertyPlantAndEquipmentByTypeAxis
6	us-gaap:PropertyPlantAndEquipmentTypeDomain (terseLabel)	Member	duration		us-gaap:PropertyPlantAndEquipmentTypeDomain
7	us-gaap:BuildingMember (terseLabel)	Member	duration		us-gaap:BuildingMember
8	us-gaap:OperatingLeasedAssetsLineItems (terseLabel)	LineItems	duration		us-gaap:OperatingLeasedAssetsLineItems
9	us-gaap:OperatingLeasesFutureMinimumPaymentsDueCurrent (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:OperatingLeasesFutureMinimumPaymentsDueCurrent
10	us-gaap:OperatingLeasesFutureMinimumPaymentsDueInTwoYears (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:OperatingLeasesFutureMinimumPaymentsDueInTwoYears
11	us-gaap:OperatingLeasesFutureMinimumPaymentsDueInThreeYears (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:OperatingLeasesFutureMinimumPaymentsDueInThreeYears
12	us-gaap:OperatingLeasesFutureMinimumPaymentsDueInFourYears (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:OperatingLeasesFutureMinimumPaymentsDueInFourYears
13	us-gaap:OperatingLeasesFutureMinimumPaymentsDueInFiveYears (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:OperatingLeasesFutureMinimumPaymentsDueInFiveYears
14	us-gaap:OperatingLeasesFutureMinimumPaymentsDueThereafter (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:OperatingLeasesFutureMinimumPaymentsDueThereafter
15	us-gaap:OperatingLeasesFutureMinimumPaymentsDue (totalLabel)	Concept (Monetary)	instant	credit	us-gaap:OperatingLeasesFutureMinimumPaymentsDue

Model Structure
Network	101030 - Disclosure - Future Minimum Lease Payments under Non-cancellable Capital Leases (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureFutureMinimumLeasePaymentsUnderNonCancellableCapitalLeasesDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Commitments And Contingencies Disclosure [Abstract]	Abstract	duration		us-gaap:CommitmentsAndContingenciesDisclosureAbstract
2	msft:FutureMinimumLeasePaymentsUnderNonCancellableCapitalLeasesTable (terseLabel)	Table	duration		msft:FutureMinimumLeasePaymentsUnderNonCancellableCapitalLeasesTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	msft:FutureMinimumLeasePaymentsUnderNonCancellableCapitalLeasesLineItems (terseLabel)	LineItems	duration		msft:FutureMinimumLeasePaymentsUnderNonCancellableCapitalLeasesLineItems
6	us-gaap:CapitalLeasesFutureMinimumPaymentsDueAbstract (terseLabel)	Abstract	duration		us-gaap:CapitalLeasesFutureMinimumPaymentsDueAbstract
7	us-gaap:CapitalLeasesFutureMinimumPaymentsDueCurrent (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:CapitalLeasesFutureMinimumPaymentsDueCurrent
8	us-gaap:CapitalLeasesFutureMinimumPaymentsDueInTwoYears (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:CapitalLeasesFutureMinimumPaymentsDueInTwoYears
9	us-gaap:CapitalLeasesFutureMinimumPaymentsDueInThreeYears (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:CapitalLeasesFutureMinimumPaymentsDueInThreeYears
10	us-gaap:CapitalLeasesFutureMinimumPaymentsDueInFourYears (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:CapitalLeasesFutureMinimumPaymentsDueInFourYears
11	us-gaap:CapitalLeasesFutureMinimumPaymentsDueInFiveYears (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:CapitalLeasesFutureMinimumPaymentsDueInFiveYears
12	us-gaap:CapitalLeasesFutureMinimumPaymentsDueThereafter (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:CapitalLeasesFutureMinimumPaymentsDueThereafter
13	us-gaap:CapitalLeasesFutureMinimumPaymentsDue (totalLabel)	Concept (Monetary)	instant	credit	us-gaap:CapitalLeasesFutureMinimumPaymentsDue

Model Structure
Network	101040 - Disclosure - Future Minimum Lease Payments under Non-cancellable Capital Leases (Parenthetical) (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureFutureMinimumLeasePaymentsUnderNonCancellableCapitalLeasesParentheticalDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Commitments And Contingencies Disclosure [Abstract]	Abstract	duration		us-gaap:CommitmentsAndContingenciesDisclosureAbstract
2	msft:FutureMinimumLeasePaymentsUnderNonCancellableCapitalLeasesTable (terseLabel)	Table	duration		msft:FutureMinimumLeasePaymentsUnderNonCancellableCapitalLeasesTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	msft:FutureMinimumLeasePaymentsUnderNonCancellableCapitalLeasesLineItems (terseLabel)	LineItems	duration		msft:FutureMinimumLeasePaymentsUnderNonCancellableCapitalLeasesLineItems
6	us-gaap:CapitalLeasesFutureMinimumPaymentsDueAbstract (terseLabel)	Abstract	duration		us-gaap:CapitalLeasesFutureMinimumPaymentsDueAbstract
7	us-gaap:CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments

Model Structure
Network	101050 - Disclosure - Contingencies - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureContingenciesAdditionalInformationDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Commitments And Contingencies Disclosure [Abstract]	Abstract	duration		us-gaap:CommitmentsAndContingenciesDisclosureAbstract
2	us-gaap:LossContingenciesTable (terseLabel)	Table	duration		us-gaap:LossContingenciesTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:LossContingenciesLineItems (terseLabel)	LineItems	duration		us-gaap:LossContingenciesLineItems
6	us-gaap:LossContingencyAccrualCarryingValueCurrent (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:LossContingencyAccrualCarryingValueCurrent
7	us-gaap:LossContingencyRangeOfPossibleLossPortionNotAccrued (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:LossContingencyRangeOfPossibleLossPortionNotAccrued

Model Structure
Network	101060 - Disclosure - Shares of Common Stock Outstanding (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureSharesOfCommonStockOutstandingDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Equity [Abstract]	Abstract	duration	us-gaap:EquityAbstract
2	us-gaap:ScheduleOfCapitalUnitsTable (terseLabel)	Table	duration	us-gaap:ScheduleOfCapitalUnitsTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:CapitalUnitLineItems (terseLabel)	LineItems	duration	us-gaap:CapitalUnitLineItems
6	us-gaap:CommonStockSharesOutstanding (periodStartLabel)	Concept (Shares)	instant	us-gaap:CommonStockSharesOutstanding
7	us-gaap:StockIssuedDuringPeriodSharesNewIssues (terseLabel)	Concept (Shares)	duration	us-gaap:StockIssuedDuringPeriodSharesNewIssues
8	us-gaap:StockRepurchasedDuringPeriodShares (negatedLabel)	Concept (Shares)	duration	us-gaap:StockRepurchasedDuringPeriodShares
9	Balance, end of year	Concept (Shares)	instant	us-gaap:CommonStockSharesOutstanding

Model Structure
Network	101070 - Disclosure - Stockholders' Equity - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureStockholdersEquityAdditionalInformationDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Statement Of Stockholders Equity [Abstract]	Abstract	duration		us-gaap:StatementOfStockholdersEquityAbstract
2	msft:ShareRepurchasesTable (terseLabel)	Table	duration		msft:ShareRepurchasesTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:ShareRepurchaseProgramAxis (terseLabel)	Axis	duration		us-gaap:ShareRepurchaseProgramAxis
6	us-gaap:ShareRepurchaseProgramDomain (terseLabel)	Member	duration		us-gaap:ShareRepurchaseProgramDomain
7	msft:ShareRepurchaseProgramTwentyThirteenMember (terseLabel)	Member	duration		msft:ShareRepurchaseProgramTwentyThirteenMember
8	msft:ShareRepurchaseProgramTwentySixteenMember (terseLabel)	Member	duration		msft:ShareRepurchaseProgramTwentySixteenMember
9	msft:ShareRepurchasesLineItems (terseLabel)	LineItems	duration		msft:ShareRepurchasesLineItems
10	us-gaap:StockRepurchaseProgramAuthorizedAmount1 (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:StockRepurchaseProgramAuthorizedAmount1
11	us-gaap:StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1 (terseLabel)	Concept (Monetary)	instant	credit	us-gaap:StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1

Model Structure
Network	101080 - Disclosure - Share Repurchases (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureShareRepurchasesDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Equity [Abstract]	Abstract	duration		us-gaap:EquityAbstract
2	msft:ShareRepurchasesTable (terseLabel)	Table	duration		msft:ShareRepurchasesTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:ShareRepurchaseProgramAxis (terseLabel)	Axis	duration		us-gaap:ShareRepurchaseProgramAxis
6	us-gaap:ShareRepurchaseProgramDomain (terseLabel)	Member	duration		us-gaap:ShareRepurchaseProgramDomain
7	msft:ShareRepurchaseProgramTwentyThirteenMember (terseLabel)	Member	duration		msft:ShareRepurchaseProgramTwentyThirteenMember
8	msft:ShareRepurchaseProgramTwentySixteenMember (terseLabel)	Member	duration		msft:ShareRepurchaseProgramTwentySixteenMember
9	msft:ShareRepurchasesLineItems (terseLabel)	LineItems	duration		msft:ShareRepurchasesLineItems
10	Shares of common stock repurchased	Concept (Shares)	duration		us-gaap:StockRepurchasedDuringPeriodShares
11	Value of common stock repurchased	Concept (Monetary)	duration	debit	us-gaap:StockRepurchasedDuringPeriodValue

Model Structure
Network	101090 - Disclosure - Dividends Declared (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureDividendsDeclaredDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Equity [Abstract]	Abstract	duration		us-gaap:EquityAbstract
2	msft:DividendsTable (terseLabel)	Table	duration		msft:DividendsTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	msft:DividendsLineItems (terseLabel)	LineItems	duration		msft:DividendsLineItems
6	us-gaap:DividendsPayableDateDeclaredDayMonthAndYear (terseLabel)	Concept (Date)	duration		us-gaap:DividendsPayableDateDeclaredDayMonthAndYear
7	Dividend Per Share	Concept (Per-Share)	duration		us-gaap:CommonStockDividendsPerShareDeclared
8	us-gaap:DividendsPayableDateOfRecordDayMonthAndYear (terseLabel)	Concept (Date)	duration		us-gaap:DividendsPayableDateOfRecordDayMonthAndYear
9	Total Amount	Concept (Monetary)	duration	debit	us-gaap:DividendsCommonStockCash
10	us-gaap:DividendPayableDateToBePaidDayMonthAndYear (terseLabel)	Concept (Date)	duration		us-gaap:DividendPayableDateToBePaidDayMonthAndYear

Model Structure
Network	101100 - Disclosure - Summary of Changes in Accumulated Other Comprehensive Income by Component (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureSummaryOfChangesInAccumulatedOtherComprehensiveIncomeByComponentDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Statement Of Income And Comprehensive Income [Abstract]	Abstract	duration		us-gaap:StatementOfIncomeAndComprehensiveIncomeAbstract
2	us-gaap:AccumulatedOtherComprehensiveIncomeLossTable (terseLabel)	Table	duration		us-gaap:AccumulatedOtherComprehensiveIncomeLossTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:StatementEquityComponentsAxis (terseLabel)	Axis	duration		us-gaap:StatementEquityComponentsAxis
6	us-gaap:EquityComponentDomain (terseLabel)	Member	duration		us-gaap:EquityComponentDomain
7	us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember (terseLabel)	Member	duration		us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
8	us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember (terseLabel)	Member	duration		us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember
9	msft:AccumulatedTranslationAdjustmentAndOtherMember (terseLabel)	Member	duration		msft:AccumulatedTranslationAdjustmentAndOtherMember
10	us-gaap:AccumulatedOtherComprehensiveIncomeMember (terseLabel)	Member	duration		us-gaap:AccumulatedOtherComprehensiveIncomeMember
11	us-gaap:IncomeStatementLocationAxis (terseLabel)	Axis	duration		us-gaap:IncomeStatementLocationAxis
12	us-gaap:IncomeStatementLocationDomain (terseLabel)	Member	duration		us-gaap:IncomeStatementLocationDomain
13	us-gaap:SalesMember (terseLabel)	Member	duration		us-gaap:SalesMember
14	us-gaap:NonoperatingIncomeExpenseMember (terseLabel)	Member	duration		us-gaap:NonoperatingIncomeExpenseMember
15	us-gaap:AccumulatedOtherComprehensiveIncomeLossLineItems (terseLabel)	LineItems	duration		us-gaap:AccumulatedOtherComprehensiveIncomeLossLineItems
16	us-gaap:StockholdersEquity (periodStartLabel)	Concept (Monetary)	instant	credit	us-gaap:StockholdersEquity
17	us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent
18	us-gaap:ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent (negatedLabel)	Concept (Monetary)	duration	debit	us-gaap:ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent
19	us-gaap:ReclassificationFromAociCurrentPeriodTax (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:ReclassificationFromAociCurrentPeriodTax
20	us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent (negatedTotalLabel)	Concept (Monetary)	duration	debit	us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent
21	Net current period other comprehensive income (loss)	Concept (Monetary)	duration	credit	us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
22	us-gaap:StockholdersEquity (periodEndLabel)	Concept (Monetary)	instant	credit	us-gaap:StockholdersEquity

Model Structure
Network	101110 - Disclosure - Summary of Changes in Accumulated Other Comprehensive Income by Component (Parenthetical) (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureSummaryOfChangesInAccumulatedOtherComprehensiveIncomeByComponentParentheticalDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Statement Of Income And Comprehensive Income [Abstract]	Abstract	duration		us-gaap:StatementOfIncomeAndComprehensiveIncomeAbstract
2	us-gaap:AccumulatedOtherComprehensiveIncomeLossTable (terseLabel)	Table	duration		us-gaap:AccumulatedOtherComprehensiveIncomeLossTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:StatementEquityComponentsAxis (terseLabel)	Axis	duration		us-gaap:StatementEquityComponentsAxis
6	us-gaap:EquityComponentDomain (terseLabel)	Member	duration		us-gaap:EquityComponentDomain
7	us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember (terseLabel)	Member	duration		us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
8	us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember (terseLabel)	Member	duration		us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember
9	msft:AccumulatedTranslationAdjustmentAndOtherMember (terseLabel)	Member	duration		msft:AccumulatedTranslationAdjustmentAndOtherMember
10	us-gaap:AccumulatedOtherComprehensiveIncomeLossLineItems (terseLabel)	LineItems	duration		us-gaap:AccumulatedOtherComprehensiveIncomeLossLineItems
11	us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsTax (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsTax
12	us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1 (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1

Model Structure
Network	101120 - Disclosure - Employee Stock and Savings Plans - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureEmployeeStockAndSavingsPlansAdditionalInformationDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	Abstract	duration		us-gaap:DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
2	msft:CompensationRelatedCostsDisclosureTable (terseLabel)	Table	duration		msft:CompensationRelatedCostsDisclosureTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:AwardTypeAxis (terseLabel)	Axis	duration		us-gaap:AwardTypeAxis
6	us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain (terseLabel)	Member	duration		us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain
7	us-gaap:RestrictedStockMember (terseLabel)	Member	duration		us-gaap:RestrictedStockMember
8	us-gaap:RestrictedStockUnitsRSUMember (terseLabel)	Member	duration		us-gaap:RestrictedStockUnitsRSUMember
9	us-gaap:PerformanceSharesMember (terseLabel)	Member	duration		us-gaap:PerformanceSharesMember
10	us-gaap:EmployeeStockMember (terseLabel)	Member	duration		us-gaap:EmployeeStockMember
11	us-gaap:RangeAxis (terseLabel)	Axis	duration		us-gaap:RangeAxis
12	us-gaap:RangeMember (terseLabel)	Member	duration		us-gaap:RangeMember
13	us-gaap:MinimumMember (terseLabel)	Member	duration		us-gaap:MinimumMember
14	us-gaap:MaximumMember (terseLabel)	Member	duration		us-gaap:MaximumMember
15	us-gaap:PlanNameAxis (terseLabel)	Axis	duration		us-gaap:PlanNameAxis
16	us-gaap:PlanNameDomain (terseLabel)	Member	duration		us-gaap:PlanNameDomain
17	msft:ExecutiveIncentivePlanMember (terseLabel)	Member	duration		msft:ExecutiveIncentivePlanMember
18	us-gaap:DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensationAxis (terseLabel)	Axis	duration		us-gaap:DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensationAxis
19	us-gaap:OtherPostretirementBenefitsIndividualContractsTypeOfDeferredCompensationDomain (terseLabel)	Member	duration		us-gaap:OtherPostretirementBenefitsIndividualContractsTypeOfDeferredCompensationDomain
20	msft:FirstSixPercentOfParticipantContributionsMember (terseLabel)	Member	duration		msft:FirstSixPercentOfParticipantContributionsMember
21	msft:IRSCompensationLimitMember (terseLabel)	Member	duration		msft:IRSCompensationLimitMember
22	msft:CompensationRelatedCostsDisclosureLineItems (terseLabel)	LineItems	duration		msft:CompensationRelatedCostsDisclosureLineItems
23	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant (terseLabel)	Concept (Shares)	instant		us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
24	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1 (terseLabel)	Concept (Duration)	duration		us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
25	us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
26	us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1 (terseLabel)	Concept (Duration)	duration		us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
27	Weighted average grant-date fair value	Concept (Per-Share)	duration		us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
28	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
29	us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent (terseLabel)	Concept (Percent)	duration		us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent
30	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate (terseLabel)	Concept (Percent)	instant		us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate
31	us-gaap:DefinedContributionPlanEmployerMatchingContributionPercentOfMatch (terseLabel)	Concept (Percent)	duration		us-gaap:DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
32	us-gaap:DefinedContributionPlanEmployerMatchingContributionPercent (terseLabel)	Concept (Percent)	duration		us-gaap:DefinedContributionPlanEmployerMatchingContributionPercent
33	us-gaap:DefinedContributionPlanCostRecognized (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:DefinedContributionPlanCostRecognized

Model Structure
Network	101130 - Disclosure - Stock-Based Compensation Expense and Related Income Tax Benefits (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureStockBasedCompensationExpenseAndRelatedIncomeTaxBenefitsDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	Abstract	duration		us-gaap:DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
2	us-gaap:ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable (terseLabel)	Table	duration		us-gaap:ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems (terseLabel)	LineItems	duration		us-gaap:EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems
6	us-gaap:AllocatedShareBasedCompensationExpense (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:AllocatedShareBasedCompensationExpense
7	us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense

Model Structure
Network	101140 - Disclosure - Assumptions Used in Estimating the Fair Value of Stock Award Grants (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureAssumptionsUsedInEstimatingFairValueOfStockAwardGrantsDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	Abstract	duration	us-gaap:DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
2	msft:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMethodUsedTable (terseLabel)	Table	duration	msft:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMethodUsedTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:RangeAxis (terseLabel)	Axis	duration	us-gaap:RangeAxis
6	us-gaap:RangeMember (terseLabel)	Member	duration	us-gaap:RangeMember
7	us-gaap:MinimumMember (terseLabel)	Member	duration	us-gaap:MinimumMember
8	us-gaap:MaximumMember (terseLabel)	Member	duration	us-gaap:MaximumMember
9	msft:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMethodUsedLineItems (terseLabel)	LineItems	duration	msft:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMethodUsedLineItems
10	msft:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendsPerShare (terseLabel)	Concept (Per-Share)	duration	msft:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendsPerShare
11	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum (terseLabel)	Concept (Percent)	duration	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum
12	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum (terseLabel)	Concept (Percent)	duration	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum

Model Structure
Network	101150 - Disclosure - Stock Plan Activity (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureStockPlanActivityDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	Abstract	duration	us-gaap:DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
2	us-gaap:ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable (terseLabel)	Table	duration	us-gaap:ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:AwardTypeAxis (terseLabel)	Axis	duration	us-gaap:AwardTypeAxis
6	us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain (terseLabel)	Member	duration	us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain
7	us-gaap:RestrictedStockMember (terseLabel)	Member	duration	us-gaap:RestrictedStockMember
8	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems (terseLabel)	LineItems	duration	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
9	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward (terseLabel)	Abstract	duration	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward
10	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber (periodStartLabel)	Concept (Shares)	instant	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
11	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod (terseLabel)	Concept (Shares)	duration	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
12	msft:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAssumedAcquisitionInPeriod (terseLabel)	Concept (Shares)	duration	msft:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAssumedAcquisitionInPeriod
13	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod (negatedLabel)	Concept (Shares)	duration	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
14	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod (negatedLabel)	Concept (Shares)	duration	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
15	Nonvested balance, end of year	Concept (Shares)	instant	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
16	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward (terseLabel)	Abstract	duration	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward
17	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue (periodStartLabel)	Concept (Per-Share)	instant	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
18	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue (terseLabel)	Concept (Per-Share)	duration	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
19	msft:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAssumedInAcquisitionsWeightedAverageGrantDateFairValue (terseLabel)	Concept (Per-Share)	duration	msft:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAssumedInAcquisitionsWeightedAverageGrantDateFairValue
20	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue (terseLabel)	Concept (Per-Share)	duration	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
21	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue (terseLabel)	Concept (Per-Share)	duration	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
22	Nonvested balance, end of year	Concept (Per-Share)	instant	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

Model Structure
Network	101160 - Disclosure - Stock Plan Activity (Parenthetical) (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureStockPlanActivityParentheticalDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	Abstract	duration	us-gaap:DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
2	us-gaap:ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable (terseLabel)	Table	duration	us-gaap:ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:AwardTypeAxis (terseLabel)	Axis	duration	us-gaap:AwardTypeAxis
6	us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain (terseLabel)	Member	duration	us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain
7	us-gaap:PerformanceSharesMember (terseLabel)	Member	duration	us-gaap:PerformanceSharesMember
8	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems (terseLabel)	LineItems	duration	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
9	Nonvested stock awards granted	Concept (Shares)	duration	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

Model Structure
Network	101170 - Disclosure - Employee Purchased Shares (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureEmployeePurchasedSharesDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	Abstract	duration	us-gaap:DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
2	msft:EmployeeStockPurchasePlanTable (terseLabel)	Table	duration	msft:EmployeeStockPurchasePlanTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	msft:EmployeeStockPurchasePlanLineItems (terseLabel)	LineItems	duration	msft:EmployeeStockPurchasePlanLineItems
6	us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans (terseLabel)	Concept (Shares)	duration	us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
7	msft:StockIssuedEmployeeStockPurchasePlanAveragePricePerShare (terseLabel)	Concept (Per-Share)	duration	msft:StockIssuedEmployeeStockPurchasePlanAveragePricePerShare

Model Structure
Network	101180 - Disclosure - Segment Revenue (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureSegmentRevenueDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Segment Reporting [Abstract]	Abstract	duration		us-gaap:SegmentReportingAbstract
2	us-gaap:ScheduleOfSegmentReportingInformationBySegmentTable (terseLabel)	Table	duration		us-gaap:ScheduleOfSegmentReportingInformationBySegmentTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:ConsolidationItemsAxis (terseLabel)	Axis	duration		us-gaap:ConsolidationItemsAxis
6	us-gaap:ConsolidationItemsDomain (terseLabel)	Member	duration		us-gaap:ConsolidationItemsDomain
7	us-gaap:OperatingSegmentsMember (terseLabel)	Member	duration		us-gaap:OperatingSegmentsMember
8	msft:CorporateAndReconcilingItemsMember (terseLabel)	Member	duration		msft:CorporateAndReconcilingItemsMember
9	us-gaap:StatementBusinessSegmentsAxis (terseLabel)	Axis	duration		us-gaap:StatementBusinessSegmentsAxis
10	us-gaap:SegmentDomain (terseLabel)	Member	duration		us-gaap:SegmentDomain
11	msft:ProductivityAndBusinessProcessesMember (terseLabel)	Member	duration		msft:ProductivityAndBusinessProcessesMember
12	msft:IntelligentCloudMember (terseLabel)	Member	duration		msft:IntelligentCloudMember
13	msft:MorePersonalComputingMember (terseLabel)	Member	duration		msft:MorePersonalComputingMember
14	us-gaap:SegmentReportingInformationLineItems (terseLabel)	LineItems	duration		us-gaap:SegmentReportingInformationLineItems
15	us-gaap:SalesRevenueNet (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:SalesRevenueNet

Model Structure
Network	101190 - Disclosure - Operating Income (Loss) by Segment (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureOperatingIncomeLossBySegmentDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Segment Reporting [Abstract]	Abstract	duration		us-gaap:SegmentReportingAbstract
2	us-gaap:ScheduleOfSegmentReportingInformationBySegmentTable (terseLabel)	Table	duration		us-gaap:ScheduleOfSegmentReportingInformationBySegmentTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:ConsolidationItemsAxis (terseLabel)	Axis	duration		us-gaap:ConsolidationItemsAxis
6	us-gaap:ConsolidationItemsDomain (terseLabel)	Member	duration		us-gaap:ConsolidationItemsDomain
7	us-gaap:OperatingSegmentsMember (terseLabel)	Member	duration		us-gaap:OperatingSegmentsMember
8	msft:CorporateAndReconcilingItemsMember (terseLabel)	Member	duration		msft:CorporateAndReconcilingItemsMember
9	us-gaap:StatementBusinessSegmentsAxis (terseLabel)	Axis	duration		us-gaap:StatementBusinessSegmentsAxis
10	us-gaap:SegmentDomain (terseLabel)	Member	duration		us-gaap:SegmentDomain
11	msft:ProductivityAndBusinessProcessesMember (terseLabel)	Member	duration		msft:ProductivityAndBusinessProcessesMember
12	msft:IntelligentCloudMember (terseLabel)	Member	duration		msft:IntelligentCloudMember
13	msft:MorePersonalComputingMember (terseLabel)	Member	duration		msft:MorePersonalComputingMember
14	us-gaap:SegmentReportingInformationLineItems (terseLabel)	LineItems	duration		us-gaap:SegmentReportingInformationLineItems
15	us-gaap:OperatingIncomeLoss (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:OperatingIncomeLoss

Model Structure
Network	101200 - Disclosure - Corporate and Other Operating Income (Loss) Activity (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureCorporateAndOtherOperatingIncomeLossActivityDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Segment Reporting [Abstract]	Abstract	duration		us-gaap:SegmentReportingAbstract
2	us-gaap:ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable (terseLabel)	Table	duration		us-gaap:ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:ConsolidationItemsAxis (terseLabel)	Axis	duration		us-gaap:ConsolidationItemsAxis
6	us-gaap:ConsolidationItemsDomain (terseLabel)	Member	duration		us-gaap:ConsolidationItemsDomain
7	msft:CorporateAndReconcilingItemsMember (terseLabel)	Member	duration		msft:CorporateAndReconcilingItemsMember
8	us-gaap:IncomeStatementLocationAxis (terseLabel)	Axis	duration		us-gaap:IncomeStatementLocationAxis
9	us-gaap:IncomeStatementLocationDomain (terseLabel)	Member	duration		us-gaap:IncomeStatementLocationDomain
10	msft:ImpairmentIntegrationAndRestructuringExpensesMember (terseLabel)	Member	duration		msft:ImpairmentIntegrationAndRestructuringExpensesMember
11	us-gaap:DeferredRevenueArrangementTypeAxis (terseLabel)	Axis	duration		us-gaap:DeferredRevenueArrangementTypeAxis
12	us-gaap:DeferredRevenueArrangementTypeDomain (terseLabel)	Member	duration		us-gaap:DeferredRevenueArrangementTypeDomain
13	Net revenue deferral from Windows 10	Member	duration		msft:WindowsTenDeferralMember
14	us-gaap:SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems (terseLabel)	LineItems	duration		us-gaap:SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems
15	us-gaap:OperatingIncomeLoss (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:OperatingIncomeLoss

Model Structure
Network	101210 - Disclosure - Segment Information and Geographic Data - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureSegmentInformationAndGeographicDataAdditionalInformationDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Name
1	Segment Reporting [Abstract]	Abstract	duration	us-gaap:SegmentReportingAbstract
2	us-gaap:ScheduleOfSegmentReportingInformationBySegmentTable (terseLabel)	Table	duration	us-gaap:ScheduleOfSegmentReportingInformationBySegmentTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration	dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration	dei:EntityDomain
5	us-gaap:SegmentReportingInformationLineItems (terseLabel)	LineItems	duration	us-gaap:SegmentReportingInformationLineItems
6	us-gaap:SegmentReportingDisclosureOfMajorCustomers (terseLabel)	Concept (String)	duration	us-gaap:SegmentReportingDisclosureOfMajorCustomers

Model Structure
Network	101220 - Disclosure - Revenue Classified by Major Geographic Areas (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureRevenueClassifiedByMajorGeographicAreasDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Segment Reporting [Abstract]	Abstract	duration		us-gaap:SegmentReportingAbstract
2	msft:GeographicInformationTable (terseLabel)	Table	duration		msft:GeographicInformationTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:StatementGeographicalAxis (terseLabel)	Axis	duration		us-gaap:StatementGeographicalAxis
6	us-gaap:SegmentGeographicalDomain (terseLabel)	Member	duration		us-gaap:SegmentGeographicalDomain
7	country:US (terseLabel)	Member	duration		country:US
8	us-gaap:NonUsMember (terseLabel)	Member	duration		us-gaap:NonUsMember
9	msft:GeographicInformationLineItems (terseLabel)	LineItems	duration		msft:GeographicInformationLineItems
10	Revenues	Concept (Monetary)	duration	credit	us-gaap:SalesRevenueNet

Model Structure
Network	101230 - Disclosure - Revenue Classified by Significant Product and Service Offerings (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureRevenueClassifiedBySignificantProductAndServiceOfferingsDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Segment Reporting [Abstract]	Abstract	duration		us-gaap:SegmentReportingAbstract
2	us-gaap:ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable (terseLabel)	Table	duration		us-gaap:ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:ProductOrServiceAxis (terseLabel)	Axis	duration		us-gaap:ProductOrServiceAxis
6	us-gaap:ProductsAndServicesDomain (terseLabel)	Member	duration		us-gaap:ProductsAndServicesDomain
7	msft:MicrosoftOfficeSystemMember (terseLabel)	Member	duration		msft:MicrosoftOfficeSystemMember
8	msft:ServerProductsAndToolsMember (terseLabel)	Member	duration		msft:ServerProductsAndToolsMember
9	msft:XboxMember (terseLabel)	Member	duration		msft:XboxMember
10	msft:WindowsOperatingSystemsForComputingDevicesMember (terseLabel)	Member	duration		msft:WindowsOperatingSystemsForComputingDevicesMember
11	msft:AdvertisingMember (terseLabel)	Member	duration		msft:AdvertisingMember
12	msft:ConsultingAndProductSupportServicesMember (terseLabel)	Member	duration		msft:ConsultingAndProductSupportServicesMember
13	msft:DevicesMember (terseLabel)	Member	duration		msft:DevicesMember
14	LinkedIn	Member	duration		msft:LinkedInCorporationMember
15	msft:OtherProductsAndServicesMember (terseLabel)	Member	duration		msft:OtherProductsAndServicesMember
16	us-gaap:EntityWideInformationRevenueFromExternalCustomerLineItems (terseLabel)	LineItems	duration		us-gaap:EntityWideInformationRevenueFromExternalCustomerLineItems
17	us-gaap:SalesRevenueNet (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:SalesRevenueNet

Model Structure
Network	101240 - Disclosure - Revenue Classified by Significant Product and Service Offerings (Parenthetical) (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureRevenueClassifiedBySignificantProductAndServiceOfferingsParentheticalDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Segment Reporting [Abstract]	Abstract	duration		us-gaap:SegmentReportingAbstract
2	us-gaap:ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable (terseLabel)	Table	duration		us-gaap:ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	msft:ProductsOrServicesSecondaryCategorizationAxis (terseLabel)	Axis	duration		msft:ProductsOrServicesSecondaryCategorizationAxis
6	msft:ProductsOrServicesNameSecondaryCategorizationDomain (terseLabel)	Member	duration		msft:ProductsOrServicesNameSecondaryCategorizationDomain
7	msft:CommercialCloudMember (terseLabel)	Member	duration		msft:CommercialCloudMember
8	us-gaap:EntityWideInformationRevenueFromExternalCustomerLineItems (terseLabel)	LineItems	duration		us-gaap:EntityWideInformationRevenueFromExternalCustomerLineItems
9	us-gaap:SalesRevenueNet (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:SalesRevenueNet

Model Structure
Network	101250 - Disclosure - Long-Lived Assets, Excluding Financial Instruments and Tax Assets, Classified by Location of Controlling Statutory Company (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureLongLivedAssetsExcludingFinancialInstrumentsAndTaxAssetsClassifiedByLocationOfControllingStatutoryCompanyDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Segment Reporting [Abstract]	Abstract	duration		us-gaap:SegmentReportingAbstract
2	msft:CertainLongLivedAssetsByGeographyTable (terseLabel)	Table	duration		msft:CertainLongLivedAssetsByGeographyTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:StatementGeographicalAxis (terseLabel)	Axis	duration		us-gaap:StatementGeographicalAxis
6	us-gaap:SegmentGeographicalDomain (terseLabel)	Member	duration		us-gaap:SegmentGeographicalDomain
7	country:US (terseLabel)	Member	duration		country:US
8	country:IE (terseLabel)	Member	duration		country:IE
9	country:LU (terseLabel)	Member	duration		country:LU
10	msft:OtherCountriesMember (terseLabel)	Member	duration		msft:OtherCountriesMember
11	msft:CertainLongLivedAssetsByGeographyLineItems (terseLabel)	LineItems	duration		msft:CertainLongLivedAssetsByGeographyLineItems
12	us-gaap:NoncurrentAssets (terseLabel)	Concept (Monetary)	instant	debit	us-gaap:NoncurrentAssets

Model Structure
Network	101260 - Disclosure - Quarterly Information (Unaudited) (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureQuarterlyInformationUnauditedDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Quarterly Financial Information Disclosure [Abstract]	Abstract	duration		us-gaap:QuarterlyFinancialInformationDisclosureAbstract
2	msft:QuarterlyFinancialInformationTable (terseLabel)	Table	duration		msft:QuarterlyFinancialInformationTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	msft:QuarterlyFinancialInformationLineItems (terseLabel)	LineItems	duration		msft:QuarterlyFinancialInformationLineItems
6	us-gaap:SalesRevenueNet (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:SalesRevenueNet
7	Gross margin	Concept (Monetary)	duration	credit	us-gaap:GrossProfit
8	Operating income	Concept (Monetary)	duration	credit	us-gaap:OperatingIncomeLoss
9	us-gaap:NetIncomeLoss (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:NetIncomeLoss
10	Basic earnings per share	Concept (Per-Share)	duration		us-gaap:EarningsPerShareBasic
11	Diluted earnings per share	Concept (Per-Share)	duration		us-gaap:EarningsPerShareDiluted

Model Structure
Network	101270 - Disclosure - Quarterly Information (Unaudited) (Parenthetical) (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureQuarterlyInformationUnauditedParentheticalDetail)
Table	(implied)

#	Label	Report Element Class	Period Type	Balance	Name
1	Quarterly Financial Information Disclosure [Abstract]	Abstract	duration		us-gaap:QuarterlyFinancialInformationDisclosureAbstract
2	msft:QuarterlyFinancialInformationTable (terseLabel)	Table	duration		msft:QuarterlyFinancialInformationTable
3	dei:LegalEntityAxis (terseLabel)	Axis	duration		dei:LegalEntityAxis
4	dei:EntityDomain (terseLabel)	Member	duration		dei:EntityDomain
5	us-gaap:DeferredRevenueArrangementTypeAxis (terseLabel)	Axis	duration		us-gaap:DeferredRevenueArrangementTypeAxis
6	us-gaap:DeferredRevenueArrangementTypeDomain (terseLabel)	Member	duration		us-gaap:DeferredRevenueArrangementTypeDomain
7	msft:WindowsTenDeferralMember (terseLabel)	Member	duration		msft:WindowsTenDeferralMember
8	us-gaap:RestructuringPlanAxis (terseLabel)	Axis	duration		us-gaap:RestructuringPlanAxis
9	us-gaap:RestructuringPlanDomain (terseLabel)	Member	duration		us-gaap:RestructuringPlanDomain
10	msft:SalesAndMarketingRestructuringPlanMember (terseLabel)	Member	duration		msft:SalesAndMarketingRestructuringPlanMember
11	2016 Restructuring Plans	Member	duration		msft:TwentySixteenRestructuringPlanMember
12	us-gaap:RestructuringCostAndReserveAxis (terseLabel)	Axis	duration		us-gaap:RestructuringCostAndReserveAxis
13	us-gaap:TypeOfRestructuringDomain (terseLabel)	Member	duration		us-gaap:TypeOfRestructuringDomain
14	us-gaap:EmployeeSeveranceMember (terseLabel)	Member	duration		us-gaap:EmployeeSeveranceMember
15	us-gaap:StatementBusinessSegmentsAxis (terseLabel)	Axis	duration		us-gaap:StatementBusinessSegmentsAxis
16	us-gaap:SegmentDomain (terseLabel)	Member	duration		us-gaap:SegmentDomain
17	msft:PhoneBusinessMember (terseLabel)	Member	duration		msft:PhoneBusinessMember
18	msft:QuarterlyFinancialInformationLineItems (terseLabel)	LineItems	duration		msft:QuarterlyFinancialInformationLineItems
19	us-gaap:SalesRevenueNet (terseLabel)	Concept (Monetary)	duration	credit	us-gaap:SalesRevenueNet
20	us-gaap:RestructuringCharges (terseLabel)	Concept (Monetary)	duration	debit	us-gaap:RestructuringCharges
21	msft:ImpairmentIntegrationAndRestructuringEffectOnOperatingIncomeLossAfterTax (terseLabel)	Concept (Monetary)	duration	credit	msft:ImpairmentIntegrationAndRestructuringEffectOnOperatingIncomeLossAfterTax
22	msft:ImpairmentIntegrationAndRestructuringEffectOnEarningsAfterTax (terseLabel)	Concept (Monetary)	duration	credit	msft:ImpairmentIntegrationAndRestructuringEffectOnEarningsAfterTax
23	msft:ImpairmentIntegrationAndRestructuringEffectOnEarningsPerShareAfterTax (terseLabel)	Concept (Per-Share)	duration		msft:ImpairmentIntegrationAndRestructuringEffectOnEarningsPerShareAfterTax
24	Asset impairment charges	Concept (Monetary)	duration	debit	us-gaap:AssetImpairmentCharges

Fact Tables

The colours used for the fact values are significant, and have the following meanings:

Reported facts that have been checked by consistency rules are in green
derived (imputed) facts are in blue
inconsistent facts in red
...and the rest (reported but unckecked) are either in gray (if some rule failed to execute) or black (if no rules exist for the fact's concept)

Fact Table
Network	100000 - Document - Document and Entity Information (http://www.microsoft.com/20170630/taxonomy/role/DocumentDocumentAndEntityInformation)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Amendment Flag	false
2	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Current Fiscal Year End Date	--06-30
3	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Document Fiscal Period Focus	FY
4	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Document Fiscal Year Focus	2017
5	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Document Period End Date	2017-06-30
6	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Document Type	10-K
7	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Entity Central Index Key	0000789019
8	0000789019 (http://www.sec.gov/CIK)	2017-07-31	Entity [Domain]	Entity Common Stock Shares Outstanding	7702243979	shares	INF
9	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Entity Current Reporting Status	Yes
10	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Entity Filer Category	Large Accelerated Filer
11	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Entity Listing Par Value Per Share	6.25e-6	iso4217:USD/shares	INF
12	0000789019 (http://www.sec.gov/CIK)	2016-12-31	Entity [Domain]	Entity Public Float	466500000000	iso4217:USD	-8
13	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Entity Registrant Name	MICROSOFT CORPORATION
14	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Entity Tax Identification Number	911144442
15	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Entity Voluntary Filers	No
16	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Entity Well Known Seasoned Issuer	Yes
17	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Trading Symbol	MSFT

Fact Table
Network	100010 - Statement - INCOME STATEMENTS (http://www.microsoft.com/20170630/taxonomy/role/StatementINCOMESTATEMENTS)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100020 - Statement - COMPREHENSIVE INCOME STATEMENTS (http://www.microsoft.com/20170630/taxonomy/role/StatementCOMPREHENSIVEINCOMESTATEMENTS)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100030 - Statement - COMPREHENSIVE INCOME STATEMENTS (Parenthetical) (http://www.microsoft.com/20170630/taxonomy/role/StatementCOMPREHENSIVEINCOMESTATEMENTSParenthetical)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100040 - Statement - BALANCE SHEETS (http://www.microsoft.com/20170630/taxonomy/role/StatementBALANCESHEETS)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100050 - Statement - BALANCE SHEETS (Parenthetical) (http://www.microsoft.com/20170630/taxonomy/role/StatementBALANCESHEETSParenthetical)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100060 - Statement - CASH FLOWS STATEMENTS (http://www.microsoft.com/20170630/taxonomy/role/StatementCASHFLOWSSTATEMENTS)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100070 - Statement - STOCKHOLDERS' EQUITY STATEMENTS (http://www.microsoft.com/20170630/taxonomy/role/StatementSTOCKHOLDERSEQUITYSTATEMENTS)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Common Stock Including Additional Paid In Capital [Member]	Adjustment To Additional Paid In Capital Income Tax Effect From Share Based Compensation Net	588000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Common Stock Including Additional Paid In Capital [Member]	Adjustment To Additional Paid In Capital Income Tax Effect From Share Based Compensation Net	0	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Common Stock Including Additional Paid In Capital [Member]	Adjustment To Additional Paid In Capital Income Tax Effect From Share Based Compensation Net	0	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Common Stock Including Additional Paid In Capital [Member]	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value	2574000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Common Stock Including Additional Paid In Capital [Member]	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value	2668000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Common Stock Including Additional Paid In Capital [Member]	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value	3266000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Equity Component [Domain]	us-gaap:DividendsCommonStockCash (label)	2868000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	Equity Component [Domain]	us-gaap:DividendsCommonStockCash (label)	2842000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	Equity Component [Domain]	us-gaap:DividendsCommonStockCash (label)	2821000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Equity Component [Domain]	us-gaap:DividendsCommonStockCash (label)	2800000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	Equity Component [Domain]	us-gaap:DividendsCommonStockCash (label)	3024000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	Equity Component [Domain]	us-gaap:DividendsCommonStockCash (label)	3012000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	Equity Component [Domain]	us-gaap:DividendsCommonStockCash (label)	3009000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Equity Component [Domain]	us-gaap:DividendsCommonStockCash (label)	3006000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Retained Earnings [Member]	us-gaap:DividendsCommonStockCash (label)	10063000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Retained Earnings [Member]	us-gaap:DividendsCommonStockCash (label)	11329000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Retained Earnings [Member]	us-gaap:DividendsCommonStockCash (label)	12040000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Equity Component [Domain]	us-gaap:NetIncomeLoss (label)	12193000000	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Equity Component [Domain]	us-gaap:NetIncomeLoss (label)	4902000000	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Equity Component [Domain]	us-gaap:NetIncomeLoss (label)	16798000000	iso4217:USD	-6
21	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	Equity Component [Domain]	us-gaap:NetIncomeLoss (label)	5018000000	iso4217:USD	-6
22	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	Equity Component [Domain]	us-gaap:NetIncomeLoss (label)	3756000000	iso4217:USD	-6
23	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Equity Component [Domain]	us-gaap:NetIncomeLoss (label)	3122000000	iso4217:USD	-6
24	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	Equity Component [Domain]	us-gaap:NetIncomeLoss (label)	4690000000	iso4217:USD	-6
25	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Equity Component [Domain]	us-gaap:NetIncomeLoss (label)	21204000000	iso4217:USD	-6
26	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	Equity Component [Domain]	us-gaap:NetIncomeLoss (label)	5200000000	iso4217:USD	-6
27	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	Equity Component [Domain]	us-gaap:NetIncomeLoss (label)	4801000000	iso4217:USD	-6
28	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Equity Component [Domain]	us-gaap:NetIncomeLoss (label)	6513000000	iso4217:USD	-6
29	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Retained Earnings [Member]	us-gaap:NetIncomeLoss (label)	12193000000	iso4217:USD	-6
30	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Retained Earnings [Member]	us-gaap:NetIncomeLoss (label)	16798000000	iso4217:USD	-6
31	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Retained Earnings [Member]	us-gaap:NetIncomeLoss (label)	21204000000	iso4217:USD	-6
32	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Equity Component [Domain]	us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (label)	-1186000000	iso4217:USD	-6
33	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Equity Component [Domain]	us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (label)	-985000000	iso4217:USD	-6
34	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Equity Component [Domain]	us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (label)	-1106000000	iso4217:USD	-6
35	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Accumulated Other Comprehensive Income [Member]	us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (label)	-1186000000	iso4217:USD	-6
36	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Accumulated Other Comprehensive Income [Member]	us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (label)	-985000000	iso4217:USD	-6
37	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Accumulated Other Comprehensive Income [Member]	us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (label)	-1106000000	iso4217:USD	-6
38	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Common Stock Including Additional Paid In Capital [Member]	Stock Issued During Period Value New Issues	634000000	iso4217:USD	-6
39	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Common Stock Including Additional Paid In Capital [Member]	Stock Issued During Period Value New Issues	668000000	iso4217:USD	-6
40	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Common Stock Including Additional Paid In Capital [Member]	Stock Issued During Period Value New Issues	772000000	iso4217:USD	-6
41	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Equity Component [Domain]	us-gaap:StockRepurchasedDuringPeriodValue (label)	13209000000	iso4217:USD	-6
42	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Equity Component [Domain]	us-gaap:StockRepurchasedDuringPeriodValue (label)	14800000000	iso4217:USD	-6
43	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Equity Component [Domain]	us-gaap:StockRepurchasedDuringPeriodValue (label)	10283000000	iso4217:USD	-6
44	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Common Stock Including Additional Paid In Capital [Member]	us-gaap:StockRepurchasedDuringPeriodValue (label)	3700000000	iso4217:USD	-6
45	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Common Stock Including Additional Paid In Capital [Member]	us-gaap:StockRepurchasedDuringPeriodValue (label)	3689000000	iso4217:USD	-6
46	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Common Stock Including Additional Paid In Capital [Member]	us-gaap:StockRepurchasedDuringPeriodValue (label)	2987000000	iso4217:USD	-6
47	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Retained Earnings [Member]	us-gaap:StockRepurchasedDuringPeriodValue (label)	10744000000	iso4217:USD	-6
48	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Retained Earnings [Member]	us-gaap:StockRepurchasedDuringPeriodValue (label)	12283000000	iso4217:USD	-6
49	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Retained Earnings [Member]	us-gaap:StockRepurchasedDuringPeriodValue (label)	8798000000	iso4217:USD	-6
50	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Equity Component [Domain]	us-gaap:StockholdersEquity (label)	80083000000	iso4217:USD	-6
51	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Component [Domain]	us-gaap:StockholdersEquity (label)	71997000000	iso4217:USD	-6
52	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Component [Domain]	us-gaap:StockholdersEquity (label)	72394000000	iso4217:USD	-6
53	0000789019 (http://www.sec.gov/CIK)	2014-06-30	Accumulated Other Comprehensive Income [Member]	us-gaap:StockholdersEquity (label)	3708000000	iso4217:USD	-6
54	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Accumulated Other Comprehensive Income [Member]	us-gaap:StockholdersEquity (label)	2522000000	iso4217:USD	-6
55	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accumulated Other Comprehensive Income [Member]	us-gaap:StockholdersEquity (label)	1537000000	iso4217:USD	-6
56	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accumulated Other Comprehensive Income [Member]	us-gaap:StockholdersEquity (label)	431000000	iso4217:USD	-6
57	0000789019 (http://www.sec.gov/CIK)	2014-06-30	Common Stock Including Additional Paid In Capital [Member]	us-gaap:StockholdersEquity (label)	68366000000	iso4217:USD	-6
58	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Common Stock Including Additional Paid In Capital [Member]	us-gaap:StockholdersEquity (label)	68465000000	iso4217:USD	-6
59	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Common Stock Including Additional Paid In Capital [Member]	us-gaap:StockholdersEquity (label)	68178000000	iso4217:USD	-6
60	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Common Stock Including Additional Paid In Capital [Member]	us-gaap:StockholdersEquity (label)	69315000000	iso4217:USD	-6
61	0000789019 (http://www.sec.gov/CIK)	2014-06-30	Retained Earnings [Member]	us-gaap:StockholdersEquity (label)	17710000000	iso4217:USD	-6
62	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Retained Earnings [Member]	us-gaap:StockholdersEquity (label)	9096000000	iso4217:USD	-6
63	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Retained Earnings [Member]	us-gaap:StockholdersEquity (label)	2282000000	iso4217:USD	-6
64	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Retained Earnings [Member]	us-gaap:StockholdersEquity (label)	2648000000	iso4217:USD	-6
65	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Common Stock Including Additional Paid In Capital [Member]	Stockholders Equity Other	-3000000	iso4217:USD	-6
66	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Common Stock Including Additional Paid In Capital [Member]	Stockholders Equity Other	-66000000	iso4217:USD	-6
67	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Common Stock Including Additional Paid In Capital [Member]	Stockholders Equity Other	-86000000	iso4217:USD	-6

Fact Table
Network	100080 - Disclosure - ACCOUNTING POLICIES (http://www.microsoft.com/20170630/taxonomy/role/DisclosureACCOUNTINGPOLICIES)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100090 - Disclosure - EARNINGS PER SHARE (http://www.microsoft.com/20170630/taxonomy/role/DisclosureEARNINGSPERSHARE)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100100 - Disclosure - OTHER INCOME (EXPENSE), NET (http://www.microsoft.com/20170630/taxonomy/role/DisclosureOTHERINCOMEEXPENSENET)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100110 - Disclosure - INVESTMENTS (http://www.microsoft.com/20170630/taxonomy/role/DisclosureINVESTMENTS)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100120 - Disclosure - DERIVATIVES (http://www.microsoft.com/20170630/taxonomy/role/DisclosureDERIVATIVES)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100130 - Disclosure - FAIR VALUE MEASUREMENTS (http://www.microsoft.com/20170630/taxonomy/role/DisclosureFAIRVALUEMEASUREMENTS)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100140 - Disclosure - INVENTORIES (http://www.microsoft.com/20170630/taxonomy/role/DisclosureINVENTORIES)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100150 - Disclosure - PROPERTY AND EQUIPMENT (http://www.microsoft.com/20170630/taxonomy/role/DisclosurePROPERTYANDEQUIPMENT)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100160 - Disclosure - BUSINESS COMBINATIONS (http://www.microsoft.com/20170630/taxonomy/role/DisclosureBUSINESSCOMBINATIONS)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100170 - Disclosure - GOODWILL (http://www.microsoft.com/20170630/taxonomy/role/DisclosureGOODWILL)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100180 - Disclosure - INTANGIBLE ASSETS (http://www.microsoft.com/20170630/taxonomy/role/DisclosureINTANGIBLEASSETS)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100190 - Disclosure - DEBT (http://www.microsoft.com/20170630/taxonomy/role/DisclosureDEBT)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100200 - Disclosure - INCOME TAXES (http://www.microsoft.com/20170630/taxonomy/role/DisclosureINCOMETAXES)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100210 - Disclosure - RESTRUCTURING CHARGES (http://www.microsoft.com/20170630/taxonomy/role/DisclosureRESTRUCTURINGCHARGES)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100220 - Disclosure - UNEARNED REVENUE (http://www.microsoft.com/20170630/taxonomy/role/DisclosureUNEARNEDREVENUE)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100230 - Disclosure - COMMITMENTS (http://www.microsoft.com/20170630/taxonomy/role/DisclosureCOMMITMENTS)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100240 - Disclosure - CONTINGENCIES (http://www.microsoft.com/20170630/taxonomy/role/DisclosureCONTINGENCIES)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100250 - Disclosure - STOCKHOLDERS' EQUITY (http://www.microsoft.com/20170630/taxonomy/role/DisclosureSTOCKHOLDERSEQUITY)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100260 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME (http://www.microsoft.com/20170630/taxonomy/role/DisclosureACCUMULATEDOTHERCOMPREHENSIVEINCOME)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100270 - Disclosure - EMPLOYEE STOCK AND SAVINGS PLANS (http://www.microsoft.com/20170630/taxonomy/role/DisclosureEMPLOYEESTOCKANDSAVINGSPLANS)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100280 - Disclosure - SEGMENT INFORMATION AND GEOGRAPHIC DATA (http://www.microsoft.com/20170630/taxonomy/role/DisclosureSEGMENTINFORMATIONANDGEOGRAPHICDATA)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100290 - Disclosure - QUARTERLY INFORMATION (UNAUDITED) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureQUARTERLYINFORMATIONUNAUDITED)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100300 - Disclosure - ACCOUNTING POLICIES (Policies) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureACCOUNTINGPOLICIESPolicies)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100310 - Disclosure - ACCOUNTING POLICIES (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureACCOUNTINGPOLICIESTables)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100320 - Disclosure - EARNINGS PER SHARE (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureEARNINGSPERSHARETables)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100330 - Disclosure - OTHER INCOME (EXPENSE), NET (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureOTHERINCOMEEXPENSENETTables)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100340 - Disclosure - INVESTMENTS (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureINVESTMENTSTables)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100350 - Disclosure - DERIVATIVES (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureDERIVATIVESTables)
Table	(implied)

Reporting Entity [Axis]

Period [Axis]

Scenario [Axis]

Concept

Fact Value

Unit

Rounding

Parenthetical Explanations

0000789019 (http://www.sec.gov/CIK)

2016-07-01 to 2017-06-30

Cash Flow Hedging [Member]

Schedule Of Derivative Instruments Gain Loss In Statement Of Financial Performance [Text Block]

We recognized the following gains (losses) on foreign exchange contracts designated as cash flow hedges:

(In millions)


Year Ended June 30,	2017			2016			2015

Effective Portion

Gains recognized in other comprehensive income (net of tax effects of $4, $24 and $35)	$	328		$	351		$	1,152
Gains reclassified from accumulated other comprehensive income into revenue		555			625			608

Amount Excluded from Effectiveness Assessment and Ineffective Portion

Losses recognized in other income (expense), net		(389	)		(354	)		(346	)

0000789019 (http://www.sec.gov/CIK)

2016-07-01 to 2017-06-30

Fair Value Hedging [Member]

Schedule Of Derivative Instruments Gain Loss In Statement Of Financial Performance [Text Block]

We recognized in other income (expense), net the following gains (losses) on contracts designated as fair value hedges and their related hedged items:

(In millions)


Year Ended June 30,	2017			2016			2015

Foreign Exchange Contracts

Derivatives	$	441		$	(797	)	$	741
Hedged items		(386	)		838			(725	)


Total amount of ineffectiveness	$	55		$	41		$	16


Equity Contracts

Derivatives	$	(74	)	$	(76	)	$	(107	)
Hedged items		74			76			107


Total amount of ineffectiveness	$	0		$	0		$	0


Amount of equity contracts excluded from effectiveness assessment	$	(80	)	$	(10	)	$	0

0000789019 (http://www.sec.gov/CIK)

2016-07-01 to 2017-06-30

Nondesignated [Member]

Schedule Of Derivative Instruments Gain Loss In Statement Of Financial Performance [Text Block]

Gains (losses) from changes in fair values of derivatives that are not designated as hedges are primarily recognized in other income (expense), net. These amounts are shown in the table below, with the exception of gains (losses) on derivatives presented in income statement line items other than other income (expense), net, which were immaterial for the periods presented. Other than those derivatives entered into for investment purposes, such as commodity contracts, the gains (losses) below are generally economically offset by unrealized gains (losses) in the underlying available-for-sale securities and gains (losses) from foreign exchange rate changes on certain balance sheet amounts.

(In millions)


Year Ended June 30,	2017			2016			2015

Foreign exchange contracts	$	(117	)	$	(55	)	$	(483	)
Equity contracts		(114	)		(21	)		(19	)
Interest-rate contracts		14			10			23
Credit contracts		5			(1	)		(1	)
Commodity contracts		(22	)		(87	)		(223	)


Total	$	(234	)	$	(154	)	$	(703	)

0000789019 (http://www.sec.gov/CIK)

2016-07-01 to 2017-06-30

Hedging Relationship [Domain]

Schedule Of Derivative Instruments In Statement Of Financial Position Fair Value [Text Block]

The following table presents the fair values of derivative instruments designated as hedging instruments (“designated hedge derivatives”) and not designated as hedging instruments (“non-designated hedge derivatives”). The fair values exclude the impact of netting derivative assets and liabilities when a legally enforceable master netting agreement exists and fair value adjustments related to our own credit risk and counterparty credit risk:

	June 30, 2017																									June 30, 2016


	Assets																	Liabilities								Assets											Liabilities


(In millions)	Short-term Investments				Other Current Assets				Equity and Other Investments				Other Long-term Assets				Other Current Liabilities				Other Long-term Liabilities				Short-term Investments				Other Current Assets				Equity and Other Investments				Other Current Liabilities

Non-designated Hedge Derivatives

Foreign exchange contracts		$	9			$	203			$	0			$	6			$	(134	)		$	(8	)		$	33			$	156			$	0			$	(296	)
Equity contracts			3				0				0				0				(6	)			0				23				0				0				(16	)
Interest rate contracts			3				0				0				0				(7	)			0				10				0				0				(25	)
Credit contracts			5				0				0				0				(1	)			0				6				0				0				(5	)


Total		$	20			$	203			$	0			$	6			$	(148	)		$	(8	)		$	72			$	156			$	0			$	(342	)


Designated Hedge Derivatives

Foreign exchange contracts		$	80			$	133			$	0			$	0			$	(3	)		$	0			$	1			$	392			$	0			$	(263	)
Equity contracts			0				0				67				0				(186	)			0				0				0				18				(25	)


Total		$	80			$	133			$	67			$	0			$	(189	)		$	0			$	1			$	392			$	18			$	(288	)


Total gross amounts of derivatives		$	100			$	336			$	67			$	6			$	(337	)		$	(8	)		$	73			$	548			$	18			$	(630	)


Gross derivatives either offset or subject to an enforceable master netting agreement		$	100			$	336			$	67			$	6			$	(334	)		$	(8	)		$	69			$	548			$	18			$	(630	)
Gross amounts of derivatives offset on the balance sheet			(20	)			(132	)			(67	)			(8	)			221				7				(74	)			(302	)			(25	)			398


Net amounts presented on the balance sheet			80				204				0				(2	)			(113	)			(1	)			(5	)			246				(7	)			(232	)
Gross amounts of derivatives not offset on the balance sheet			0				0				0				0				0				0				0				0				0				0
Cash collateral received			0				0				0				0				(228	)			0				0				0				0				(250	)


Net amount		$	80			$	204			$	0			$	(2	)		$	(341	)		$	(1	)		$	(5	)		$	246			$	(7	)		$	(482	)

0000789019 (http://www.sec.gov/CIK)

2016-07-01 to 2017-06-30

Hedging Designation [Domain]

Schedule Of Derivative Instruments In Statement Of Financial Position Fair Value [Text Block]

	June 30, 2017																									June 30, 2016


	Assets																	Liabilities								Assets											Liabilities


(In millions)	Short-term Investments				Other Current Assets				Equity and Other Investments				Other Long-term Assets				Other Current Liabilities				Other Long-term Liabilities				Short-term Investments				Other Current Assets				Equity and Other Investments				Other Current Liabilities

Non-designated Hedge Derivatives

Foreign exchange contracts		$	9			$	203			$	0			$	6			$	(134	)		$	(8	)		$	33			$	156			$	0			$	(296	)
Equity contracts			3				0				0				0				(6	)			0				23				0				0				(16	)
Interest rate contracts			3				0				0				0				(7	)			0				10				0				0				(25	)
Credit contracts			5				0				0				0				(1	)			0				6				0				0				(5	)


Total		$	20			$	203			$	0			$	6			$	(148	)		$	(8	)		$	72			$	156			$	0			$	(342	)


Designated Hedge Derivatives

Foreign exchange contracts		$	80			$	133			$	0			$	0			$	(3	)		$	0			$	1			$	392			$	0			$	(263	)
Equity contracts			0				0				67				0				(186	)			0				0				0				18				(25	)


Total		$	80			$	133			$	67			$	0			$	(189	)		$	0			$	1			$	392			$	18			$	(288	)


Total gross amounts of derivatives		$	100			$	336			$	67			$	6			$	(337	)		$	(8	)		$	73			$	548			$	18			$	(630	)


Gross derivatives either offset or subject to an enforceable master netting agreement		$	100			$	336			$	67			$	6			$	(334	)		$	(8	)		$	69			$	548			$	18			$	(630	)
Gross amounts of derivatives offset on the balance sheet			(20	)			(132	)			(67	)			(8	)			221				7				(74	)			(302	)			(25	)			398


Net amounts presented on the balance sheet			80				204				0				(2	)			(113	)			(1	)			(5	)			246				(7	)			(232	)
Gross amounts of derivatives not offset on the balance sheet			0				0				0				0				0				0				0				0				0				0
Cash collateral received			0				0				0				0				(228	)			0				0				0				0				(250	)


Net amount		$	80			$	204			$	0			$	(2	)		$	(341	)		$	(1	)		$	(5	)		$	246			$	(7	)		$	(482	)

Fact Table
Network	100360 - Disclosure - FAIR VALUE MEASUREMENTS (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureFAIRVALUEMEASUREMENTSTables)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100370 - Disclosure - INVENTORIES (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureINVENTORIESTables)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100380 - Disclosure - PROPERTY AND EQUIPMENT (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosurePROPERTYANDEQUIPMENTTables)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100390 - Disclosure - BUSINESS COMBINATIONS (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureBUSINESSCOMBINATIONSTables)
Table	(implied)

Reporting Entity [Axis]

Period [Axis]

Scenario [Axis]

Concept

Fact Value

Unit

Rounding

Parenthetical Explanations

0000789019 (http://www.sec.gov/CIK)

2016-07-01 to 2017-06-30

msft:LinkedInCorporationMember (label)

Revenue And Operating Loss Attributable To Acquiree Since Acquisition Date Table [Text Block]

Our consolidated income statement includes the following revenue and operating loss attributable to LinkedIn since the date of acquisition:

(In millions)


Year Ended June 30,		2017

Revenue	$	2,268
Operating loss	$	(948	)

0000789019 (http://www.sec.gov/CIK)

2016-07-01 to 2017-06-30

msft:LinkedInCorporationMember (label)

Business Acquisition Pro Forma Information [Text Block]

Following are the supplemental consolidated financial results of Microsoft Corporation on an unaudited pro forma basis, as if the acquisition had been consummated on July 1, 2015:

(In millions, except earnings per share)


Year Ended June 30,		2017		2016

Revenue	$	91,668	$	88,652
Net income		20,894		15,383
Diluted earnings per share		2.67		1.92

0000789019 (http://www.sec.gov/CIK)

2016-07-01 to 2017-06-30

Business Acquisition Acquiree [Domain]

Schedule Of Acquired Finite Lived Intangible Assets By Major Class [Text Block]

The components of intangible assets acquired during the periods presented were as follows:

(In millions)	Amount		Weighted Average Life		Amount		Weighted Average Life


Year Ended June 30,	2017				2016

Customer-related	$	3,607		7 years	$	30		3 years
Technology-based		2,265		2 years		361		4 years
Marketing-related		2,148		19 years		2		1 year
Contract-based		63		6 years		0		n/a


Total	$	8,083		9 years	$	393		4 years

0000789019 (http://www.sec.gov/CIK)

2016-07-01 to 2017-06-30

msft:LinkedInCorporationMember (label)

Schedule Of Acquired Finite Lived Intangible Assets By Major Class [Text Block]

Following are the details of the purchase price allocated to the intangible assets acquired:

(In millions)	Amount		Weighted Average Life


Customer-related	$	3,607		7 years
Marketing-related (trade names)		2,148		20 years
Technology-based		2,109		3 years
Contract-based		23		5 years


Fair value of intangible assets acquired	$	7,887		9 years

0000789019 (http://www.sec.gov/CIK)

2016-07-01 to 2017-06-30

msft:LinkedInCorporationMember (label)

Schedule Of Business Acquisitions By Acquisition [Text Block]

The major classes of assets and liabilities to which we allocated the purchase price were as follows:

(In millions)


Cash and cash equivalents	$	1,328
Short-term investments		2,110
Other current assets		697
Property and equipment		1,529
Intangible assets		7,887
Goodwill ⁽^a⁾		16,803
Short-term debt ^(b)		(1,323	)
Other current liabilities		(1,117	)
Deferred income taxes		(774	)
Other		(131	)


Total purchase price	$	27,009

(a)	Goodwill was assigned to our Productivity and Business Processes segment. The goodwill was primarily attributed to increased synergies that are expected to be achieved from the integration of LinkedIn. None of the goodwill is expected to be deductible for income tax purposes.

(b)

Convertible senior notes issued by LinkedIn on November 12, 2014, substantially all of which were redeemed after our acquisition of LinkedIn. The remaining $18 million of notes are not redeemable and are included in long-term debt on our consolidated balance sheets. See Note 12 – Debt for further information.

Fact Table
Network	100400 - Disclosure - GOODWILL (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureGOODWILLTables)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100410 - Disclosure - INTANGIBLE ASSETS (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureINTANGIBLEASSETSTables)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100420 - Disclosure - DEBT (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureDEBTTables)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100430 - Disclosure - INCOME TAXES (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureINCOMETAXESTables)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100440 - Disclosure - RESTRUCTURING CHARGES (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureRESTRUCTURINGCHARGESTables)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100450 - Disclosure - UNEARNED REVENUE (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureUNEARNEDREVENUETables)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100460 - Disclosure - COMMITMENTS (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureCOMMITMENTSTables)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100470 - Disclosure - STOCKHOLDERS' EQUITY (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureSTOCKHOLDERSEQUITYTables)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100480 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureACCUMULATEDOTHERCOMPREHENSIVEINCOMETables)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100490 - Disclosure - EMPLOYEE STOCK AND SAVINGS PLANS (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureEMPLOYEESTOCKANDSAVINGSPLANSTables)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100500 - Disclosure - SEGMENT INFORMATION AND GEOGRAPHIC DATA (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureSEGMENTINFORMATIONANDGEOGRAPHICDATATables)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100510 - Disclosure - QUARTERLY INFORMATION (UNAUDITED) (Tables) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureQUARTERLYINFORMATIONUNAUDITEDTables)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100520 - Disclosure - Accounting Policies - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureAccountingPoliciesAdditionalInformationDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	Accounts Receivable Net And Other Assets	4200000000	iso4217:USD	-8
2	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Accounts Receivable Net And Other Assets	4200000000	iso4217:USD	-8
3	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	Accounts Receivable Net And Other Assets	2700000000	iso4217:USD	-8
4	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Accounts Receivable Net And Other Assets	2700000000	iso4217:USD	-8
5	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	Operating Lease Liabilities	5200000000	iso4217:USD	-8
6	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Operating Lease Liabilities	5200000000	iso4217:USD	-8
7	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	Operating Lease Liabilities	6600000000	iso4217:USD	-8
8	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Operating Lease Liabilities	6600000000	iso4217:USD	-8
9	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	Operating Lease Right Of Use Assets	5200000000	iso4217:USD	-8
10	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Operating Lease Right Of Use Assets	5200000000	iso4217:USD	-8
11	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	Operating Lease Right Of Use Assets	6600000000	iso4217:USD	-8
12	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Operating Lease Right Of Use Assets	6600000000	iso4217:USD	-8
13	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	msft:WindowsTenDeferralMember (label)	Revenue Recognition Period	_2458082
14	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:MaximumMember (label)	Revenue Recognition Period	_2458684
15	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	msft:WindowsTenDeferralMember (label)	Revenue Recognition Period	_2459288
16	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:MinimumMember (label)	Revenue Recognition Period	_2459890
17	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Type Of Adoption [Member]	Advertising Expense	1900000000	iso4217:USD	-8
18	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Deferred Revenue Arrangement Type [Domain]	Advertising Expense	1900000000	iso4217:USD	-8
19	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Property Plant And Equipment Type [Domain]	Advertising Expense	1900000000	iso4217:USD	-8
20	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Range [Member]	Advertising Expense	1900000000	iso4217:USD	-8
21	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Scenario Unspecified [Domain]	Advertising Expense	1900000000	iso4217:USD	-8
22	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Type Of Adoption [Member]	Advertising Expense	1600000000	iso4217:USD	-8
23	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Deferred Revenue Arrangement Type [Domain]	Advertising Expense	1600000000	iso4217:USD	-8
24	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Property Plant And Equipment Type [Domain]	Advertising Expense	1600000000	iso4217:USD	-8
25	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Range [Member]	Advertising Expense	1600000000	iso4217:USD	-8
26	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Unspecified [Domain]	Advertising Expense	1600000000	iso4217:USD	-8
27	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Type Of Adoption [Member]	Advertising Expense	1500000000	iso4217:USD	-8
28	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Deferred Revenue Arrangement Type [Domain]	Advertising Expense	1500000000	iso4217:USD	-8
29	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Property Plant And Equipment Type [Domain]	Advertising Expense	1500000000	iso4217:USD	-8
30	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Range [Member]	Advertising Expense	1500000000	iso4217:USD	-8
31	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Unspecified [Domain]	Advertising Expense	1500000000	iso4217:USD	-8
32	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Type Of Adoption [Member]	Deferred Revenue	33909000000	iso4217:USD	-6
33	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Deferred Revenue Arrangement Type [Domain]	Deferred Revenue	33909000000	iso4217:USD	-6
34	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Property Plant And Equipment Type [Domain]	Deferred Revenue	33909000000	iso4217:USD	-6
35	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Range [Member]	Deferred Revenue	33909000000	iso4217:USD	-6
36	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Unspecified [Domain]	Deferred Revenue	33909000000	iso4217:USD	-6
37	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Type Of Adoption [Member]	Deferred Revenue	44479000000	iso4217:USD	-6
38	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Deferred Revenue Arrangement Type [Domain]	Deferred Revenue	44479000000	iso4217:USD	-6
39	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Property Plant And Equipment Type [Domain]	Deferred Revenue	44479000000	iso4217:USD	-6
40	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Range [Member]	Deferred Revenue	44479000000	iso4217:USD	-6
41	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Unspecified [Domain]	Deferred Revenue	44479000000	iso4217:USD	-6
42	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	Deferred Revenue	-11716000000	iso4217:USD	-6
43	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Deferred Revenue	-11716000000	iso4217:USD	-6
44	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	Deferred Revenue	-17823000000	iso4217:USD	-6
45	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Deferred Revenue	-17823000000	iso4217:USD	-6
46	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	Deferred Revenue	0	iso4217:USD	-6
47	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Deferred Revenue	0	iso4217:USD	-6
48	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	Deferred Revenue	0	iso4217:USD	-6
49	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Deferred Revenue	0	iso4217:USD	-6
50	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Deferred Revenue	22193000000	iso4217:USD	-6
51	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Deferred Revenue	26656000000	iso4217:USD	-6
52	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Type Of Adoption [Member]	Deferred Tax Liabilities Noncurrent	1476000000	iso4217:USD	-6
53	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Deferred Revenue Arrangement Type [Domain]	Deferred Tax Liabilities Noncurrent	1476000000	iso4217:USD	-6
54	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Property Plant And Equipment Type [Domain]	Deferred Tax Liabilities Noncurrent	1476000000	iso4217:USD	-6
55	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Range [Member]	Deferred Tax Liabilities Noncurrent	1476000000	iso4217:USD	-6
56	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Unspecified [Domain]	Deferred Tax Liabilities Noncurrent	1476000000	iso4217:USD	-6
57	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Type Of Adoption [Member]	Deferred Tax Liabilities Noncurrent	531000000	iso4217:USD	-6
58	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Deferred Revenue Arrangement Type [Domain]	Deferred Tax Liabilities Noncurrent	531000000	iso4217:USD	-6
59	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Property Plant And Equipment Type [Domain]	Deferred Tax Liabilities Noncurrent	531000000	iso4217:USD	-6
60	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Range [Member]	Deferred Tax Liabilities Noncurrent	531000000	iso4217:USD	-6
61	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Unspecified [Domain]	Deferred Tax Liabilities Noncurrent	531000000	iso4217:USD	-6
62	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	Deferred Tax Liabilities Noncurrent	4837000000	iso4217:USD	-6
63	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Deferred Tax Liabilities Noncurrent	4837000000	iso4217:USD	-6
64	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	Deferred Tax Liabilities Noncurrent	5203000000	iso4217:USD	-6
65	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Deferred Tax Liabilities Noncurrent	5203000000	iso4217:USD	-6
66	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	Deferred Tax Liabilities Noncurrent	0	iso4217:USD	-6
67	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Deferred Tax Liabilities Noncurrent	0	iso4217:USD	-6
68	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	Deferred Tax Liabilities Noncurrent	0	iso4217:USD	-6
69	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Deferred Tax Liabilities Noncurrent	0	iso4217:USD	-6
70	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Deferred Tax Liabilities Noncurrent	6313000000	iso4217:USD	-6
71	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Deferred Tax Liabilities Noncurrent	5734000000	iso4217:USD	-6
72	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:MaximumMember (label)	Finite Lived Intangible Asset Useful Life	_2491946
73	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:MinimumMember (label)	Finite Lived Intangible Asset Useful Life	_2492548
74	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Type Of Adoption [Member]	us-gaap:IncomeTaxExpenseBenefit (label)	6314000000	iso4217:USD	-6
75	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Deferred Revenue Arrangement Type [Domain]	us-gaap:IncomeTaxExpenseBenefit (label)	6314000000	iso4217:USD	-6
76	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Property Plant And Equipment Type [Domain]	us-gaap:IncomeTaxExpenseBenefit (label)	6314000000	iso4217:USD	-6
77	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Range [Member]	us-gaap:IncomeTaxExpenseBenefit (label)	6314000000	iso4217:USD	-6
78	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Scenario Unspecified [Domain]	us-gaap:IncomeTaxExpenseBenefit (label)	6314000000	iso4217:USD	-6
79	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Type Of Adoption [Member]	us-gaap:IncomeTaxExpenseBenefit (label)	2953000000	iso4217:USD	-6
80	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Deferred Revenue Arrangement Type [Domain]	us-gaap:IncomeTaxExpenseBenefit (label)	2953000000	iso4217:USD	-6
81	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Property Plant And Equipment Type [Domain]	us-gaap:IncomeTaxExpenseBenefit (label)	2953000000	iso4217:USD	-6
82	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Range [Member]	us-gaap:IncomeTaxExpenseBenefit (label)	2953000000	iso4217:USD	-6
83	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Unspecified [Domain]	us-gaap:IncomeTaxExpenseBenefit (label)	2953000000	iso4217:USD	-6
84	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Type Of Adoption [Member]	us-gaap:IncomeTaxExpenseBenefit (label)	1945000000	iso4217:USD	-6
85	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Deferred Revenue Arrangement Type [Domain]	us-gaap:IncomeTaxExpenseBenefit (label)	1945000000	iso4217:USD	-6
86	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Property Plant And Equipment Type [Domain]	us-gaap:IncomeTaxExpenseBenefit (label)	1945000000	iso4217:USD	-6
87	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Range [Member]	us-gaap:IncomeTaxExpenseBenefit (label)	1945000000	iso4217:USD	-6
88	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Unspecified [Domain]	us-gaap:IncomeTaxExpenseBenefit (label)	1945000000	iso4217:USD	-6
89	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	us-gaap:IncomeTaxExpenseBenefit (label)	2147000000	iso4217:USD	-6
90	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	us-gaap:IncomeTaxExpenseBenefit (label)	2147000000	iso4217:USD	-6
91	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	us-gaap:IncomeTaxExpenseBenefit (label)	2467000000	iso4217:USD	-6
92	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	us-gaap:IncomeTaxExpenseBenefit (label)	2467000000	iso4217:USD	-6
93	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	us-gaap:IncomeTaxExpenseBenefit (label)	0	iso4217:USD	-6
94	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	us-gaap:IncomeTaxExpenseBenefit (label)	0	iso4217:USD	-6
95	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	us-gaap:IncomeTaxExpenseBenefit (label)	0	iso4217:USD	-6
96	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	us-gaap:IncomeTaxExpenseBenefit (label)	0	iso4217:USD	-6
97	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	us-gaap:IncomeTaxExpenseBenefit (label)	5100000000	iso4217:USD	-6
98	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	us-gaap:IncomeTaxExpenseBenefit (label)	4412000000	iso4217:USD	-6
99	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Building And Building Improvements [Member]	Property Plant And Equipment Useful Life	_2508060
100	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:MaximumMember (label)	Property Plant And Equipment Useful Life	_2508662
101	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Building And Building Improvements [Member]	Property Plant And Equipment Useful Life	_2509252
102	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:MinimumMember (label)	Property Plant And Equipment Useful Life	_2509854
103	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Computer Equipment [Member]	Property Plant And Equipment Useful Life	_2510444
104	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:MaximumMember (label)	Property Plant And Equipment Useful Life	_2511046
105	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Computer Equipment [Member]	Property Plant And Equipment Useful Life	_2511636
106	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:MinimumMember (label)	Property Plant And Equipment Useful Life	_2512238
107	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Furniture And Fixtures [Member]	Property Plant And Equipment Useful Life	_2512828
108	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:MaximumMember (label)	Property Plant And Equipment Useful Life	_2513430
109	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Furniture And Fixtures [Member]	Property Plant And Equipment Useful Life	_2514020
110	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:MinimumMember (label)	Property Plant And Equipment Useful Life	_2514622
111	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Leasehold Improvements [Member]	Property Plant And Equipment Useful Life	_2515212
112	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:MaximumMember (label)	Property Plant And Equipment Useful Life	_2515814
113	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Leasehold Improvements [Member]	Property Plant And Equipment Useful Life	_2516404
114	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:MinimumMember (label)	Property Plant And Equipment Useful Life	_2517006
115	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Software And Software Development Costs [Member]	Property Plant And Equipment Useful Life	_2517596
116	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:MaximumMember (label)	Property Plant And Equipment Useful Life	_2518198
117	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Software And Software Development Costs [Member]	Property Plant And Equipment Useful Life	_2518788
118	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:MinimumMember (label)	Property Plant And Equipment Useful Life	_2519390
119	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Type Of Adoption [Member]	us-gaap:SalesRevenueNet (label)	93580000000	iso4217:USD	-6
120	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Deferred Revenue Arrangement Type [Domain]	us-gaap:SalesRevenueNet (label)	93580000000	iso4217:USD	-6
121	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Property Plant And Equipment Type [Domain]	us-gaap:SalesRevenueNet (label)	93580000000	iso4217:USD	-6
122	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Range [Member]	us-gaap:SalesRevenueNet (label)	93580000000	iso4217:USD	-6
123	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Scenario Unspecified [Domain]	us-gaap:SalesRevenueNet (label)	93580000000	iso4217:USD	-6
124	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Type Of Adoption [Member]	us-gaap:SalesRevenueNet (label)	20379000000	iso4217:USD	-6
125	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Deferred Revenue Arrangement Type [Domain]	us-gaap:SalesRevenueNet (label)	20379000000	iso4217:USD	-6
126	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Property Plant And Equipment Type [Domain]	us-gaap:SalesRevenueNet (label)	20379000000	iso4217:USD	-6
127	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Range [Member]	us-gaap:SalesRevenueNet (label)	20379000000	iso4217:USD	-6
128	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Scenario Unspecified [Domain]	us-gaap:SalesRevenueNet (label)	20379000000	iso4217:USD	-6
129	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Type Of Adoption [Member]	us-gaap:SalesRevenueNet (label)	85320000000	iso4217:USD	-6
130	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Deferred Revenue Arrangement Type [Domain]	us-gaap:SalesRevenueNet (label)	85320000000	iso4217:USD	-6
131	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Property Plant And Equipment Type [Domain]	us-gaap:SalesRevenueNet (label)	85320000000	iso4217:USD	-6
132	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Range [Member]	us-gaap:SalesRevenueNet (label)	85320000000	iso4217:USD	-6
133	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Unspecified [Domain]	us-gaap:SalesRevenueNet (label)	85320000000	iso4217:USD	-6
134	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	Type Of Adoption [Member]	us-gaap:SalesRevenueNet (label)	23796000000	iso4217:USD	-6
135	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	Deferred Revenue Arrangement Type [Domain]	us-gaap:SalesRevenueNet (label)	23796000000	iso4217:USD	-6
136	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	Property Plant And Equipment Type [Domain]	us-gaap:SalesRevenueNet (label)	23796000000	iso4217:USD	-6
137	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	Range [Member]	us-gaap:SalesRevenueNet (label)	23796000000	iso4217:USD	-6
138	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	Scenario Unspecified [Domain]	us-gaap:SalesRevenueNet (label)	23796000000	iso4217:USD	-6
139	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	Type Of Adoption [Member]	us-gaap:SalesRevenueNet (label)	20531000000	iso4217:USD	-6
140	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	Deferred Revenue Arrangement Type [Domain]	us-gaap:SalesRevenueNet (label)	20531000000	iso4217:USD	-6
141	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	Property Plant And Equipment Type [Domain]	us-gaap:SalesRevenueNet (label)	20531000000	iso4217:USD	-6
142	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	Range [Member]	us-gaap:SalesRevenueNet (label)	20531000000	iso4217:USD	-6
143	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	Scenario Unspecified [Domain]	us-gaap:SalesRevenueNet (label)	20531000000	iso4217:USD	-6
144	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Type Of Adoption [Member]	us-gaap:SalesRevenueNet (label)	20614000000	iso4217:USD	-6
145	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Deferred Revenue Arrangement Type [Domain]	us-gaap:SalesRevenueNet (label)	20614000000	iso4217:USD	-6
146	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Property Plant And Equipment Type [Domain]	us-gaap:SalesRevenueNet (label)	20614000000	iso4217:USD	-6
147	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Range [Member]	us-gaap:SalesRevenueNet (label)	20614000000	iso4217:USD	-6
148	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Scenario Unspecified [Domain]	us-gaap:SalesRevenueNet (label)	20614000000	iso4217:USD	-6
149	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	Type Of Adoption [Member]	us-gaap:SalesRevenueNet (label)	20453000000	iso4217:USD	-6
150	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	Deferred Revenue Arrangement Type [Domain]	us-gaap:SalesRevenueNet (label)	20453000000	iso4217:USD	-6
151	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	Property Plant And Equipment Type [Domain]	us-gaap:SalesRevenueNet (label)	20453000000	iso4217:USD	-6
152	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	Range [Member]	us-gaap:SalesRevenueNet (label)	20453000000	iso4217:USD	-6
153	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	Scenario Unspecified [Domain]	us-gaap:SalesRevenueNet (label)	20453000000	iso4217:USD	-6
154	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Type Of Adoption [Member]	us-gaap:SalesRevenueNet (label)	89950000000	iso4217:USD	-6
155	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Deferred Revenue Arrangement Type [Domain]	us-gaap:SalesRevenueNet (label)	89950000000	iso4217:USD	-6
156	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Property Plant And Equipment Type [Domain]	us-gaap:SalesRevenueNet (label)	89950000000	iso4217:USD	-6
157	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Range [Member]	us-gaap:SalesRevenueNet (label)	89950000000	iso4217:USD	-6
158	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Unspecified [Domain]	us-gaap:SalesRevenueNet (label)	89950000000	iso4217:USD	-6
159	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	Type Of Adoption [Member]	us-gaap:SalesRevenueNet (label)	24090000000	iso4217:USD	-6
160	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	Deferred Revenue Arrangement Type [Domain]	us-gaap:SalesRevenueNet (label)	24090000000	iso4217:USD	-6
161	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	Property Plant And Equipment Type [Domain]	us-gaap:SalesRevenueNet (label)	24090000000	iso4217:USD	-6
162	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	Range [Member]	us-gaap:SalesRevenueNet (label)	24090000000	iso4217:USD	-6
163	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	Scenario Unspecified [Domain]	us-gaap:SalesRevenueNet (label)	24090000000	iso4217:USD	-6
164	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	Type Of Adoption [Member]	us-gaap:SalesRevenueNet (label)	22090000000	iso4217:USD	-6
165	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	Deferred Revenue Arrangement Type [Domain]	us-gaap:SalesRevenueNet (label)	22090000000	iso4217:USD	-6
166	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	Property Plant And Equipment Type [Domain]	us-gaap:SalesRevenueNet (label)	22090000000	iso4217:USD	-6
167	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	Range [Member]	us-gaap:SalesRevenueNet (label)	22090000000	iso4217:USD	-6
168	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	Scenario Unspecified [Domain]	us-gaap:SalesRevenueNet (label)	22090000000	iso4217:USD	-6
169	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Type Of Adoption [Member]	us-gaap:SalesRevenueNet (label)	23317000000	iso4217:USD	-6
170	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Deferred Revenue Arrangement Type [Domain]	us-gaap:SalesRevenueNet (label)	23317000000	iso4217:USD	-6
171	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Property Plant And Equipment Type [Domain]	us-gaap:SalesRevenueNet (label)	23317000000	iso4217:USD	-6
172	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Range [Member]	us-gaap:SalesRevenueNet (label)	23317000000	iso4217:USD	-6
173	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Scenario Unspecified [Domain]	us-gaap:SalesRevenueNet (label)	23317000000	iso4217:USD	-6
174	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	us-gaap:SalesRevenueNet (label)	5834000000	iso4217:USD	-6
175	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	us-gaap:SalesRevenueNet (label)	5834000000	iso4217:USD	-6
176	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	us-gaap:SalesRevenueNet (label)	6621000000	iso4217:USD	-6
177	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	us-gaap:SalesRevenueNet (label)	6621000000	iso4217:USD	-6
178	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	us-gaap:SalesRevenueNet (label)	0	iso4217:USD	-6
179	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	us-gaap:SalesRevenueNet (label)	0	iso4217:USD	-6
180	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	us-gaap:SalesRevenueNet (label)	0	iso4217:USD	-6
181	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	us-gaap:SalesRevenueNet (label)	0	iso4217:USD	-6
182	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	msft:WindowsTenDeferralMember (label)	us-gaap:SalesRevenueNet (label)	1300000000	iso4217:USD	-8
183	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	msft:WindowsTenDeferralMember (label)	us-gaap:SalesRevenueNet (label)	6600000000	iso4217:USD	-8
184	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	msft:WindowsTenDeferralMember (label)	us-gaap:SalesRevenueNet (label)	1700000000	iso4217:USD	-8
185	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	msft:WindowsTenDeferralMember (label)	us-gaap:SalesRevenueNet (label)	1600000000	iso4217:USD	-8
186	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	msft:WindowsTenDeferralMember (label)	us-gaap:SalesRevenueNet (label)	2000000000	iso4217:USD	-8
187	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	msft:WindowsTenDeferralMember (label)	us-gaap:SalesRevenueNet (label)	1900000000	iso4217:USD	-8
188	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	msft:WindowsTenDeferralMember (label)	us-gaap:SalesRevenueNet (label)	6700000000	iso4217:USD	-8
189	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	msft:WindowsTenDeferralMember (label)	us-gaap:SalesRevenueNet (label)	2000000000	iso4217:USD	-8
190	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	msft:WindowsTenDeferralMember (label)	us-gaap:SalesRevenueNet (label)	1500000000	iso4217:USD	-8
191	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	msft:WindowsTenDeferralMember (label)	us-gaap:SalesRevenueNet (label)	1400000000	iso4217:USD	-8
192	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	us-gaap:SalesRevenueNet (label)	91154000000	iso4217:USD	-6
193	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	us-gaap:SalesRevenueNet (label)	96571000000	iso4217:USD	-6

Fact Table
Network	100530 - Disclosure - Allowance for Doubtful Accounts (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureAllowanceForDoubtfulAccountsDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Allowance For Doubtful Accounts [Member]	Valuation Allowances And Reserves Charged To Costs And Other	77000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Allowance For Doubtful Accounts [Member]	Valuation Allowances And Reserves Charged To Costs And Other	146000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Allowance For Doubtful Accounts [Member]	Valuation Allowances And Reserves Charged To Costs And Other	85000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2014-06-30	Allowance For Doubtful Accounts [Member]	us-gaap:ValuationAllowancesAndReservesBalance (label)	301000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Allowance For Doubtful Accounts [Member]	us-gaap:ValuationAllowancesAndReservesBalance (label)	335000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Allowance For Doubtful Accounts [Member]	us-gaap:ValuationAllowancesAndReservesBalance (label)	426000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Allowance For Doubtful Accounts [Member]	us-gaap:ValuationAllowancesAndReservesBalance (label)	405000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Allowance For Doubtful Accounts [Member]	Valuation Allowances And Reserves Deductions	43000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Allowance For Doubtful Accounts [Member]	Valuation Allowances And Reserves Deductions	55000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Allowance For Doubtful Accounts [Member]	Valuation Allowances And Reserves Deductions	106000000	iso4217:USD	-6

Fact Table
Network	100540 - Disclosure - Expected Impacts of Adoption of Standards Related to Revenue Recognition and Leases to Reported Results - (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureExpectedImpactsOfAdoptionOfStandardsRelatedToRevenueRecognitionAndLeasesToReportedResultsDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	us-gaap:AccountsReceivableNetCurrent (label)	2359000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	us-gaap:AccountsReceivableNetCurrent (label)	2359000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	us-gaap:AccountsReceivableNetCurrent (label)	2639000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	us-gaap:AccountsReceivableNetCurrent (label)	2639000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	us-gaap:AccountsReceivableNetCurrent (label)	0	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	us-gaap:AccountsReceivableNetCurrent (label)	0	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	us-gaap:AccountsReceivableNetCurrent (label)	0	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	us-gaap:AccountsReceivableNetCurrent (label)	0	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	us-gaap:AccountsReceivableNetCurrent (label)	20636000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	us-gaap:AccountsReceivableNetCurrent (label)	22431000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	Deferred Revenue	-11716000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Deferred Revenue	-11716000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	Deferred Revenue	-17823000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Deferred Revenue	-17823000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	Deferred Revenue	0	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Deferred Revenue	0	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	Deferred Revenue	0	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Deferred Revenue	0	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Deferred Revenue	22193000000	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Deferred Revenue	26656000000	iso4217:USD	-6
21	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	Deferred Tax Liabilities Noncurrent	4837000000	iso4217:USD	-6
22	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Deferred Tax Liabilities Noncurrent	4837000000	iso4217:USD	-6
23	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	Deferred Tax Liabilities Noncurrent	5203000000	iso4217:USD	-6
24	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Deferred Tax Liabilities Noncurrent	5203000000	iso4217:USD	-6
25	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	Deferred Tax Liabilities Noncurrent	0	iso4217:USD	-6
26	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Deferred Tax Liabilities Noncurrent	0	iso4217:USD	-6
27	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	Deferred Tax Liabilities Noncurrent	0	iso4217:USD	-6
28	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Deferred Tax Liabilities Noncurrent	0	iso4217:USD	-6
29	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Deferred Tax Liabilities Noncurrent	6313000000	iso4217:USD	-6
30	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Deferred Tax Liabilities Noncurrent	5734000000	iso4217:USD	-6
31	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	us-gaap:EarningsPerShareDiluted (label)	0.46	iso4217:USD/shares	2
32	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	us-gaap:EarningsPerShareDiluted (label)	0.46	iso4217:USD/shares	2
33	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	us-gaap:EarningsPerShareDiluted (label)	0.54	iso4217:USD/shares	2
34	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	us-gaap:EarningsPerShareDiluted (label)	0.54	iso4217:USD/shares	2
35	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	us-gaap:EarningsPerShareDiluted (label)	0	iso4217:USD/shares	0
36	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	us-gaap:EarningsPerShareDiluted (label)	0	iso4217:USD/shares	0
37	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	us-gaap:EarningsPerShareDiluted (label)	0	iso4217:USD/shares	0
38	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	us-gaap:EarningsPerShareDiluted (label)	0	iso4217:USD/shares	0
39	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	us-gaap:EarningsPerShareDiluted (label)	2.56	iso4217:USD/shares	2
40	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	us-gaap:EarningsPerShareDiluted (label)	3.25	iso4217:USD/shares	2
41	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	us-gaap:IncomeTaxExpenseBenefit (label)	2147000000	iso4217:USD	-6
42	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	us-gaap:IncomeTaxExpenseBenefit (label)	2147000000	iso4217:USD	-6
43	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	us-gaap:IncomeTaxExpenseBenefit (label)	2467000000	iso4217:USD	-6
44	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	us-gaap:IncomeTaxExpenseBenefit (label)	2467000000	iso4217:USD	-6
45	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	us-gaap:IncomeTaxExpenseBenefit (label)	0	iso4217:USD	-6
46	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	us-gaap:IncomeTaxExpenseBenefit (label)	0	iso4217:USD	-6
47	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	us-gaap:IncomeTaxExpenseBenefit (label)	0	iso4217:USD	-6
48	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	us-gaap:IncomeTaxExpenseBenefit (label)	0	iso4217:USD	-6
49	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	us-gaap:IncomeTaxExpenseBenefit (label)	5100000000	iso4217:USD	-6
50	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	us-gaap:IncomeTaxExpenseBenefit (label)	4412000000	iso4217:USD	-6
51	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	us-gaap:NetIncomeLoss (label)	3741000000	iso4217:USD	-6
52	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	us-gaap:NetIncomeLoss (label)	3741000000	iso4217:USD	-6
53	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	us-gaap:NetIncomeLoss (label)	4285000000	iso4217:USD	-6
54	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	us-gaap:NetIncomeLoss (label)	4285000000	iso4217:USD	-6
55	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	us-gaap:NetIncomeLoss (label)	0	iso4217:USD	-6
56	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	us-gaap:NetIncomeLoss (label)	0	iso4217:USD	-6
57	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	us-gaap:NetIncomeLoss (label)	0	iso4217:USD	-6
58	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	us-gaap:NetIncomeLoss (label)	0	iso4217:USD	-6
59	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	us-gaap:NetIncomeLoss (label)	20539000000	iso4217:USD	-6
60	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	us-gaap:NetIncomeLoss (label)	25489000000	iso4217:USD	-6
61	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	Operating Lease Liability	0	iso4217:USD	-6
62	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Operating Lease Liability	0	iso4217:USD	-6
63	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	Operating Lease Liability	0	iso4217:USD	-6
64	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Operating Lease Liability	0	iso4217:USD	-6
65	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	Operating Lease Liability	4257000000	iso4217:USD	-6
66	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Operating Lease Liability	4257000000	iso4217:USD	-6
67	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	Operating Lease Liability	5372000000	iso4217:USD	-6
68	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Operating Lease Liability	5372000000	iso4217:USD	-6
69	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Operating Lease Liability	4257000000	iso4217:USD	-6
70	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Operating Lease Liability	5372000000	iso4217:USD	-6
71	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	Operating Lease Right Of Use Asset	0	iso4217:USD	-6
72	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Operating Lease Right Of Use Asset	0	iso4217:USD	-6
73	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	Operating Lease Right Of Use Asset	0	iso4217:USD	-6
74	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Operating Lease Right Of Use Asset	0	iso4217:USD	-6
75	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	Operating Lease Right Of Use Asset	5198000000	iso4217:USD	-6
76	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Operating Lease Right Of Use Asset	5198000000	iso4217:USD	-6
77	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	Operating Lease Right Of Use Asset	6555000000	iso4217:USD	-6
78	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Operating Lease Right Of Use Asset	6555000000	iso4217:USD	-6
79	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Operating Lease Right Of Use Asset	5198000000	iso4217:USD	-6
80	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Operating Lease Right Of Use Asset	6555000000	iso4217:USD	-6
81	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	Other Assets	1872000000	iso4217:USD	-6
82	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Other Assets	1872000000	iso4217:USD	-6
83	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	Other Assets	32000000	iso4217:USD	-6
84	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Other Assets	32000000	iso4217:USD	-6
85	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	Other Assets	0	iso4217:USD	-6
86	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Other Assets	0	iso4217:USD	-6
87	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	Other Assets	0	iso4217:USD	-6
88	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Other Assets	0	iso4217:USD	-6
89	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Other Assets	11180000000	iso4217:USD	-6
90	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Other Assets	11179000000	iso4217:USD	-6
91	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	Other Liabilities	17000000	iso4217:USD	-6
92	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Other Liabilities	17000000	iso4217:USD	-6
93	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	Other Liabilities	-26000000	iso4217:USD	-6
94	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Other Liabilities	-26000000	iso4217:USD	-6
95	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	Other Liabilities	941000000	iso4217:USD	-6
96	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Other Liabilities	941000000	iso4217:USD	-6
97	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	Other Liabilities	1183000000	iso4217:USD	-6
98	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Other Liabilities	1183000000	iso4217:USD	-6
99	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Other Liabilities	20547000000	iso4217:USD	-6
100	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Other Liabilities	24621000000	iso4217:USD	-6
101	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	us-gaap:SalesRevenueNet (label)	5834000000	iso4217:USD	-6
102	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	us-gaap:SalesRevenueNet (label)	5834000000	iso4217:USD	-6
103	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	us-gaap:SalesRevenueNet (label)	6621000000	iso4217:USD	-6
104	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	us-gaap:SalesRevenueNet (label)	6621000000	iso4217:USD	-6
105	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	us-gaap:SalesRevenueNet (label)	0	iso4217:USD	-6
106	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	us-gaap:SalesRevenueNet (label)	0	iso4217:USD	-6
107	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	us-gaap:SalesRevenueNet (label)	0	iso4217:USD	-6
108	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	us-gaap:SalesRevenueNet (label)	0	iso4217:USD	-6
109	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	us-gaap:SalesRevenueNet (label)	91154000000	iso4217:USD	-6
110	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	us-gaap:SalesRevenueNet (label)	96571000000	iso4217:USD	-6
111	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	us-gaap:StockholdersEquity (label)	11093000000	iso4217:USD	-6
112	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	us-gaap:StockholdersEquity (label)	11093000000	iso4217:USD	-6
113	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:AccountingStandardsUpdate201409Member (label)	us-gaap:StockholdersEquity (label)	15317000000	iso4217:USD	-6
114	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	us-gaap:StockholdersEquity (label)	15317000000	iso4217:USD	-6
115	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	us-gaap:StockholdersEquity (label)	0	iso4217:USD	-6
116	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	us-gaap:StockholdersEquity (label)	0	iso4217:USD	-6
117	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:AccountingStandardsUpdate201602Member (label)	us-gaap:StockholdersEquity (label)	0	iso4217:USD	-6
118	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	us-gaap:StockholdersEquity (label)	0	iso4217:USD	-6
119	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	us-gaap:StockholdersEquity (label)	83090000000	iso4217:USD	-6
120	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	us-gaap:StockholdersEquity (label)	87711000000	iso4217:USD	-6

Fact Table
Network	100550 - Disclosure - Basic and Diluted Earnings Per Share (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureBasicAndDilutedEarningsPerShareDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100560 - Disclosure - Components of Other Income (Expense), Net (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureComponentsOfOtherIncomeExpenseNetDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100570 - Disclosure - Net Recognized Gains (Losses) on Investments (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureNetRecognizedGainsLossesOnInvestmentsDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100580 - Disclosure - Investment Components, Including Associated Derivatives (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureInvestmentComponentsIncludingAssociatedDerivativesDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Investment Type Categorization [Member]	us-gaap:AvailableForSaleSecurities (label)	123671000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Investment Type Categorization [Member]	us-gaap:AvailableForSaleSecurities (label)	139004000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	us-gaap:AvailableForSaleSecurities (label)	4808000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	us-gaap:AvailableForSaleSecurities (label)	3931000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Certificates Of Deposit [Member]	us-gaap:AvailableForSaleSecurities (label)	1000000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Certificates Of Deposit [Member]	us-gaap:AvailableForSaleSecurities (label)	1358000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	us-gaap:AvailableForSaleSecurities (label)	298000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commercial Paper [Member]	us-gaap:AvailableForSaleSecurities (label)	319000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	us-gaap:AvailableForSaleSecurities (label)	6584000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	us-gaap:AvailableForSaleSecurities (label)	4835000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	us-gaap:AvailableForSaleSecurities (label)	9813000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	us-gaap:AvailableForSaleSecurities (label)	5500000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	us-gaap:AvailableForSaleSecurities (label)	5494000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	us-gaap:AvailableForSaleSecurities (label)	5265000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Money Market Funds [Member]	us-gaap:AvailableForSaleSecurities (label)	1012000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Money Market Funds [Member]	us-gaap:AvailableForSaleSecurities (label)	1478000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	us-gaap:AvailableForSaleSecurities (label)	90204000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	us-gaap:AvailableForSaleSecurities (label)	111844000000	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S States And Political Subdivisions [Member]	us-gaap:AvailableForSaleSecurities (label)	342000000	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S States And Political Subdivisions [Member]	us-gaap:AvailableForSaleSecurities (label)	327000000	iso4217:USD	-6
21	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Investment Type Categorization [Member]	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	4895000000	iso4217:USD	-6
22	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Investment Type Categorization [Member]	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	3267000000	iso4217:USD	-6
23	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Security Investments [Member]	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	0	iso4217:USD	-6
24	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Security Investments [Member]	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	0	iso4217:USD	-6
25	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	21000000	iso4217:USD	-6
26	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	14000000	iso4217:USD	-6
27	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Cash [Member]	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	0	iso4217:USD	-6
28	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Cash [Member]	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	0	iso4217:USD	-6
29	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Certificates Of Deposit [Member]	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	0	iso4217:USD	-6
30	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Certificates Of Deposit [Member]	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	0	iso4217:USD	-6
31	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	0	iso4217:USD	-6
32	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commercial Paper [Member]	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	0	iso4217:USD	-6
33	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	110000000	iso4217:USD	-6
34	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	61000000	iso4217:USD	-6
35	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	4452000000	iso4217:USD	-6
36	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	3062000000	iso4217:USD	-6
37	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	10000000	iso4217:USD	-6
38	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	2000000	iso4217:USD	-6
39	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Money Market Funds [Member]	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	0	iso4217:USD	-6
40	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Money Market Funds [Member]	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	0	iso4217:USD	-6
41	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	245000000	iso4217:USD	-6
42	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	85000000	iso4217:USD	-6
43	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S States And Political Subdivisions [Member]	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	57000000	iso4217:USD	-6
44	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S States And Political Subdivisions [Member]	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	43000000	iso4217:USD	-6
45	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Investment Type Categorization [Member]	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	302000000	iso4217:USD	-6
46	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Investment Type Categorization [Member]	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	423000000	iso4217:USD	-6
47	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Security Investments [Member]	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	0	iso4217:USD	-6
48	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Security Investments [Member]	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	0	iso4217:USD	-6
49	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	2000000	iso4217:USD	-6
50	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	4000000	iso4217:USD	-6
51	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Cash [Member]	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	0	iso4217:USD	-6
52	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Cash [Member]	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	0	iso4217:USD	-6
53	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Certificates Of Deposit [Member]	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	0	iso4217:USD	-6
54	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Certificates Of Deposit [Member]	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	0	iso4217:USD	-6
55	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	0	iso4217:USD	-6
56	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commercial Paper [Member]	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	0	iso4217:USD	-6
57	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	35000000	iso4217:USD	-6
58	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	12000000	iso4217:USD	-6
59	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	236000000	iso4217:USD	-6
60	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	34000000	iso4217:USD	-6
61	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	18000000	iso4217:USD	-6
62	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	13000000	iso4217:USD	-6
63	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Money Market Funds [Member]	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	0	iso4217:USD	-6
64	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Money Market Funds [Member]	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	0	iso4217:USD	-6
65	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	11000000	iso4217:USD	-6
66	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	360000000	iso4217:USD	-6
67	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S States And Political Subdivisions [Member]	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	0	iso4217:USD	-6
68	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S States And Political Subdivisions [Member]	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	0	iso4217:USD	-6
69	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Investment Type Categorization [Member]	Available For Sale Securities Amortized Cost	119078000000	iso4217:USD	-6
70	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Investment Type Categorization [Member]	Available For Sale Securities Amortized Cost	136160000000	iso4217:USD	-6
71	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	Available For Sale Securities Amortized Cost	4789000000	iso4217:USD	-6
72	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	Available For Sale Securities Amortized Cost	3921000000	iso4217:USD	-6
73	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Certificates Of Deposit [Member]	Available For Sale Securities Amortized Cost	1000000000	iso4217:USD	-6
74	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Certificates Of Deposit [Member]	Available For Sale Securities Amortized Cost	1358000000	iso4217:USD	-6
75	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	Available For Sale Securities Amortized Cost	298000000	iso4217:USD	-6
76	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commercial Paper [Member]	Available For Sale Securities Amortized Cost	319000000	iso4217:USD	-6
77	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	Available For Sale Securities Amortized Cost	6509000000	iso4217:USD	-6
78	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	Available For Sale Securities Amortized Cost	4786000000	iso4217:USD	-6
79	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	Available For Sale Securities Amortized Cost	5597000000	iso4217:USD	-6
80	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	Available For Sale Securities Amortized Cost	2472000000	iso4217:USD	-6
81	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	Available For Sale Securities Amortized Cost	5502000000	iso4217:USD	-6
82	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	Available For Sale Securities Amortized Cost	5276000000	iso4217:USD	-6
83	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Money Market Funds [Member]	Available For Sale Securities Amortized Cost	1012000000	iso4217:USD	-6
84	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Money Market Funds [Member]	Available For Sale Securities Amortized Cost	1478000000	iso4217:USD	-6
85	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	Available For Sale Securities Amortized Cost	89970000000	iso4217:USD	-6
86	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	Available For Sale Securities Amortized Cost	112119000000	iso4217:USD	-6
87	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S States And Political Subdivisions [Member]	Available For Sale Securities Amortized Cost	285000000	iso4217:USD	-6
88	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S States And Political Subdivisions [Member]	Available For Sale Securities Amortized Cost	284000000	iso4217:USD	-6
89	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Investment Type Categorization [Member]	us-gaap:AvailableForSaleSecuritiesCurrent (label)	106730000000	iso4217:USD	-6
90	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Investment Type Categorization [Member]	us-gaap:AvailableForSaleSecuritiesCurrent (label)	125318000000	iso4217:USD	-6
91	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Security Investments [Member]	us-gaap:AvailableForSaleSecuritiesCurrent (label)	-3000000	iso4217:USD	-6
92	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Security Investments [Member]	us-gaap:AvailableForSaleSecuritiesCurrent (label)	0	iso4217:USD	-6
93	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	us-gaap:AvailableForSaleSecuritiesCurrent (label)	4808000000	iso4217:USD	-6
94	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	us-gaap:AvailableForSaleSecuritiesCurrent (label)	3931000000	iso4217:USD	-6
95	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Cash [Member]	us-gaap:AvailableForSaleSecuritiesCurrent (label)	0	iso4217:USD	-6
96	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Cash [Member]	us-gaap:AvailableForSaleSecuritiesCurrent (label)	0	iso4217:USD	-6
97	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Certificates Of Deposit [Member]	us-gaap:AvailableForSaleSecuritiesCurrent (label)	132000000	iso4217:USD	-6
98	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Certificates Of Deposit [Member]	us-gaap:AvailableForSaleSecuritiesCurrent (label)	386000000	iso4217:USD	-6
99	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	us-gaap:AvailableForSaleSecuritiesCurrent (label)	0	iso4217:USD	-6
100	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commercial Paper [Member]	us-gaap:AvailableForSaleSecuritiesCurrent (label)	250000000	iso4217:USD	-6
101	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	us-gaap:AvailableForSaleSecuritiesCurrent (label)	6584000000	iso4217:USD	-6
102	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	us-gaap:AvailableForSaleSecuritiesCurrent (label)	4835000000	iso4217:USD	-6
103	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	us-gaap:AvailableForSaleSecuritiesCurrent (label)	0	iso4217:USD	-6
104	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	us-gaap:AvailableForSaleSecuritiesCurrent (label)	0	iso4217:USD	-6
105	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	us-gaap:AvailableForSaleSecuritiesCurrent (label)	4763000000	iso4217:USD	-6
106	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	us-gaap:AvailableForSaleSecuritiesCurrent (label)	3761000000	iso4217:USD	-6
107	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Money Market Funds [Member]	us-gaap:AvailableForSaleSecuritiesCurrent (label)	0	iso4217:USD	-6
108	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Money Market Funds [Member]	us-gaap:AvailableForSaleSecuritiesCurrent (label)	0	iso4217:USD	-6
109	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	us-gaap:AvailableForSaleSecuritiesCurrent (label)	90104000000	iso4217:USD	-6
110	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	us-gaap:AvailableForSaleSecuritiesCurrent (label)	111828000000	iso4217:USD	-6
111	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S States And Political Subdivisions [Member]	us-gaap:AvailableForSaleSecuritiesCurrent (label)	342000000	iso4217:USD	-6
112	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S States And Political Subdivisions [Member]	us-gaap:AvailableForSaleSecuritiesCurrent (label)	327000000	iso4217:USD	-6
113	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Cash [Member]	us-gaap:Cash (label)	3501000000	iso4217:USD	-6
114	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Cash [Member]	us-gaap:Cash (label)	3624000000	iso4217:USD	-6
115	0000789019 (http://www.sec.gov/CIK)	2014-06-30	Investment Type Categorization [Member]	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	8669000000	iso4217:USD	-6
116	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Investment Type Categorization [Member]	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	5595000000	iso4217:USD	-6
117	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Investment Type Categorization [Member]	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	6510000000	iso4217:USD	-6
118	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Investment Type Categorization [Member]	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	7663000000	iso4217:USD	-6
119	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Security Investments [Member]	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	0	iso4217:USD	-6
120	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Security Investments [Member]	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	0	iso4217:USD	-6
121	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	0	iso4217:USD	-6
122	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	0	iso4217:USD	-6
123	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Cash [Member]	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	3501000000	iso4217:USD	-6
124	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Cash [Member]	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	3624000000	iso4217:USD	-6
125	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Certificates Of Deposit [Member]	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	868000000	iso4217:USD	-6
126	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Certificates Of Deposit [Member]	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	972000000	iso4217:USD	-6
127	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	298000000	iso4217:USD	-6
128	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commercial Paper [Member]	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	69000000	iso4217:USD	-6
129	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	0	iso4217:USD	-6
130	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	0	iso4217:USD	-6
131	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	0	iso4217:USD	-6
132	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	0	iso4217:USD	-6
133	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	731000000	iso4217:USD	-6
134	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	1504000000	iso4217:USD	-6
135	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Money Market Funds [Member]	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	1012000000	iso4217:USD	-6
136	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Money Market Funds [Member]	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	1478000000	iso4217:USD	-6
137	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	100000000	iso4217:USD	-6
138	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	16000000	iso4217:USD	-6
139	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S States And Political Subdivisions [Member]	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	0	iso4217:USD	-6
140	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S States And Political Subdivisions [Member]	us-gaap:CashAndCashEquivalentsAtCarryingValue (label)	0	iso4217:USD	-6
141	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Security Investments [Member]	Equity Method Investment Aggregate Cost	615000000	iso4217:USD	-6
142	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Security Investments [Member]	Equity Method Investment Aggregate Cost	523000000	iso4217:USD	-6
143	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Security Investments [Member]	us-gaap:EquityMethodInvestments (label)	615000000	iso4217:USD	-6
144	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Security Investments [Member]	us-gaap:EquityMethodInvestments (label)	523000000	iso4217:USD	-6
145	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Investment Type Categorization [Member]	us-gaap:LongTermInvestments (label)	10431000000	iso4217:USD	-6
146	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Investment Type Categorization [Member]	us-gaap:LongTermInvestments (label)	6023000000	iso4217:USD	-6
147	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Security Investments [Member]	us-gaap:LongTermInvestments (label)	618000000	iso4217:USD	-6
148	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Security Investments [Member]	us-gaap:LongTermInvestments (label)	523000000	iso4217:USD	-6
149	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	us-gaap:LongTermInvestments (label)	0	iso4217:USD	-6
150	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	us-gaap:LongTermInvestments (label)	0	iso4217:USD	-6
151	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Cash [Member]	us-gaap:LongTermInvestments (label)	0	iso4217:USD	-6
152	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Cash [Member]	us-gaap:LongTermInvestments (label)	0	iso4217:USD	-6
153	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Certificates Of Deposit [Member]	us-gaap:LongTermInvestments (label)	0	iso4217:USD	-6
154	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Certificates Of Deposit [Member]	us-gaap:LongTermInvestments (label)	0	iso4217:USD	-6
155	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	us-gaap:LongTermInvestments (label)	0	iso4217:USD	-6
156	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commercial Paper [Member]	us-gaap:LongTermInvestments (label)	0	iso4217:USD	-6
157	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	us-gaap:LongTermInvestments (label)	0	iso4217:USD	-6
158	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	us-gaap:LongTermInvestments (label)	0	iso4217:USD	-6
159	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	us-gaap:LongTermInvestments (label)	9813000000	iso4217:USD	-6
160	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	us-gaap:LongTermInvestments (label)	5500000000	iso4217:USD	-6
161	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	us-gaap:LongTermInvestments (label)	0	iso4217:USD	-6
162	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	us-gaap:LongTermInvestments (label)	0	iso4217:USD	-6
163	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Money Market Funds [Member]	us-gaap:LongTermInvestments (label)	0	iso4217:USD	-6
164	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Money Market Funds [Member]	us-gaap:LongTermInvestments (label)	0	iso4217:USD	-6
165	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	us-gaap:LongTermInvestments (label)	0	iso4217:USD	-6
166	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	us-gaap:LongTermInvestments (label)	0	iso4217:USD	-6
167	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S States And Political Subdivisions [Member]	us-gaap:LongTermInvestments (label)	0	iso4217:USD	-6
168	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S States And Political Subdivisions [Member]	us-gaap:LongTermInvestments (label)	0	iso4217:USD	-6

Fact Table
Network	100590 - Disclosure - Investments - Cost Method - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureInvestmentsCostMethodAdditionalInformationDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations
1	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Measurements Nonrecurring [Member]	us-gaap:CostMethodInvestments (label)	767000000		iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Measurements Nonrecurring [Member]	us-gaap:CostMethodInvestments (label)	1073000000		iso4217:USD	-6

Fact Table
Network	100600 - Disclosure - Investments - Secured Borrowings and Loaned Securities - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureInvestmentsSecuredBorrowingsAndLoanedSecuritiesAdditionalInformationDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations
1	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Cash [Member]	Securities Received As Collateral	294000000		iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	Securities Received As Collateral	3700000000		iso4217:USD	-8

Fact Table
Network	100610 - Disclosure - Unrealized Losses on Investments (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureUnrealizedLossesOnInvestmentsDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Major Types Of Debt And Equity Securities [Domain]	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss	137000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Major Types Of Debt And Equity Securities [Domain]	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss	56000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss	1000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss	1000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss	24000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss	4000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss	89000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss	28000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss	15000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss	11000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss	8000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss	12000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Major Types Of Debt And Equity Securities [Domain]	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss	302000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Major Types Of Debt And Equity Securities [Domain]	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss	423000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss	2000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss	4000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss	35000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss	12000000	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss	236000000	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss	34000000	iso4217:USD	-6
21	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss	18000000	iso4217:USD	-6
22	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss	13000000	iso4217:USD	-6
23	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss	11000000	iso4217:USD	-6
24	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss	360000000	iso4217:USD	-6
25	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Major Types Of Debt And Equity Securities [Domain]	Available For Sale Securities Continuous Unrealized Loss Position Fair Value	14155000000	iso4217:USD	-6
26	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Major Types Of Debt And Equity Securities [Domain]	Available For Sale Securities Continuous Unrealized Loss Position Fair Value	94287000000	iso4217:USD	-6
27	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Fair Value	1166000000	iso4217:USD	-6
28	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Fair Value	1266000000	iso4217:USD	-6
29	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Fair Value	1968000000	iso4217:USD	-6
30	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Fair Value	846000000	iso4217:USD	-6
31	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Fair Value	1286000000	iso4217:USD	-6
32	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Fair Value	217000000	iso4217:USD	-6
33	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Fair Value	3487000000	iso4217:USD	-6
34	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Fair Value	4029000000	iso4217:USD	-6
35	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	Available For Sale Securities Continuous Unrealized Loss Position Fair Value	6248000000	iso4217:USD	-6
36	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	Available For Sale Securities Continuous Unrealized Loss Position Fair Value	87929000000	iso4217:USD	-6
37	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Major Types Of Debt And Equity Securities [Domain]	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss	165000000	iso4217:USD	-6
38	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Major Types Of Debt And Equity Securities [Domain]	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss	367000000	iso4217:USD	-6
39	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss	1000000	iso4217:USD	-6
40	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss	3000000	iso4217:USD	-6
41	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss	11000000	iso4217:USD	-6
42	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss	8000000	iso4217:USD	-6
43	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss	147000000	iso4217:USD	-6
44	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss	6000000	iso4217:USD	-6
45	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss	3000000	iso4217:USD	-6
46	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss	2000000	iso4217:USD	-6
47	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss	3000000	iso4217:USD	-6
48	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss	348000000	iso4217:USD	-6
49	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Major Types Of Debt And Equity Securities [Domain]	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value	12188000000	iso4217:USD	-6
50	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Major Types Of Debt And Equity Securities [Domain]	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value	93370000000	iso4217:USD	-6
51	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value	844000000	iso4217:USD	-6
52	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value	1068000000	iso4217:USD	-6
53	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value	1180000000	iso4217:USD	-6
54	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value	669000000	iso4217:USD	-6
55	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value	896000000	iso4217:USD	-6
56	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value	69000000	iso4217:USD	-6
57	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value	3452000000	iso4217:USD	-6
58	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value	4006000000	iso4217:USD	-6
59	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value	5816000000	iso4217:USD	-6
60	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value	87558000000	iso4217:USD	-6
61	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Major Types Of Debt And Equity Securities [Domain]	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value	1967000000	iso4217:USD	-6
62	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Major Types Of Debt And Equity Securities [Domain]	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value	917000000	iso4217:USD	-6
63	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value	322000000	iso4217:USD	-6
64	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value	198000000	iso4217:USD	-6
65	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value	788000000	iso4217:USD	-6
66	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value	177000000	iso4217:USD	-6
67	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value	390000000	iso4217:USD	-6
68	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value	148000000	iso4217:USD	-6
69	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value	35000000	iso4217:USD	-6
70	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value	23000000	iso4217:USD	-6
71	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value	432000000	iso4217:USD	-6
72	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value	371000000	iso4217:USD	-6

Fact Table
Network	100620 - Disclosure - Debt Investment Maturities (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureDebtInvestmentMaturitiesDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100630 - Disclosure - Derivatives - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureDerivativesAdditionalInformationDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commodity Contract [Member]	Derivative Notional Amount	631000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Notional Amount	631000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Long [Member]	Derivative Notional Amount	631000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commodity Contract [Member]	Derivative Notional Amount	19000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Notional Amount	19000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Long [Member]	Derivative Notional Amount	19000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commodity Contract [Member]	Derivative Notional Amount	162000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Notional Amount	162000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short [Member]	Derivative Notional Amount	162000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Credit Risk Contract [Member]	Derivative Notional Amount	440000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Notional Amount	440000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Long [Member]	Derivative Notional Amount	440000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Credit Risk Contract [Member]	Derivative Notional Amount	267000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Notional Amount	267000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Long [Member]	Derivative Notional Amount	267000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Credit Risk Contract [Member]	Derivative Notional Amount	273000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Notional Amount	273000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short [Member]	Derivative Notional Amount	273000000	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Credit Risk Contract [Member]	Derivative Notional Amount	63000000	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Notional Amount	63000000	iso4217:USD	-6
21	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short [Member]	Derivative Notional Amount	63000000	iso4217:USD	-6
22	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Contract [Member]	Derivative Notional Amount	737000000	iso4217:USD	-6
23	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Designated As Hedging Instrument [Member]	Derivative Notional Amount	737000000	iso4217:USD	-6
24	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Long [Member]	Derivative Notional Amount	737000000	iso4217:USD	-6
25	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Contract [Member]	Derivative Notional Amount	1600000000	iso4217:USD	-8
26	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Notional Amount	1600000000	iso4217:USD	-8
27	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Long [Member]	Derivative Notional Amount	1600000000	iso4217:USD	-8
28	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Contract [Member]	Derivative Notional Amount	986000000	iso4217:USD	-6
29	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Designated As Hedging Instrument [Member]	Derivative Notional Amount	986000000	iso4217:USD	-6
30	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short [Member]	Derivative Notional Amount	986000000	iso4217:USD	-6
31	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Contract [Member]	Derivative Notional Amount	1800000000	iso4217:USD	-8
32	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Notional Amount	1800000000	iso4217:USD	-8
33	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short [Member]	Derivative Notional Amount	1800000000	iso4217:USD	-8
34	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Contract [Member]	Derivative Notional Amount	1300000000	iso4217:USD	-8
35	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Long [Member]	Derivative Notional Amount	1300000000	iso4217:USD	-8
36	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Contract [Member]	Derivative Notional Amount	1900000000	iso4217:USD	-8
37	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Long [Member]	Derivative Notional Amount	1900000000	iso4217:USD	-8
38	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Contract [Member]	Derivative Notional Amount	2200000000	iso4217:USD	-8
39	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short [Member]	Derivative Notional Amount	2200000000	iso4217:USD	-8
40	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Contract [Member]	Derivative Notional Amount	2400000000	iso4217:USD	-8
41	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short [Member]	Derivative Notional Amount	2400000000	iso4217:USD	-8
42	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Exchange Contract [Member]	Derivative Notional Amount	8400000000	iso4217:USD	-8
43	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Cash Flow Hedging [Member]	Derivative Notional Amount	8400000000	iso4217:USD	-8
44	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short [Member]	Derivative Notional Amount	8400000000	iso4217:USD	-8
45	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Exchange Contract [Member]	Derivative Notional Amount	8900000000	iso4217:USD	-8
46	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Cash Flow Hedging [Member]	Derivative Notional Amount	8900000000	iso4217:USD	-8
47	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short [Member]	Derivative Notional Amount	8900000000	iso4217:USD	-8
48	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Exchange Contract [Member]	Derivative Notional Amount	5300000000	iso4217:USD	-8
49	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Hedging [Member]	Derivative Notional Amount	5300000000	iso4217:USD	-8
50	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short [Member]	Derivative Notional Amount	5300000000	iso4217:USD	-8
51	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Exchange Contract [Member]	Derivative Notional Amount	5100000000	iso4217:USD	-8
52	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Hedging [Member]	Derivative Notional Amount	5100000000	iso4217:USD	-8
53	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short [Member]	Derivative Notional Amount	5100000000	iso4217:USD	-8
54	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Exchange Contract [Member]	Derivative Notional Amount	12000000000	iso4217:USD	-8
55	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Notional Amount	12000000000	iso4217:USD	-8
56	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Long [Member]	Derivative Notional Amount	12000000000	iso4217:USD	-8
57	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Exchange Contract [Member]	Derivative Notional Amount	8800000000	iso4217:USD	-8
58	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Notional Amount	8800000000	iso4217:USD	-8
59	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Long [Member]	Derivative Notional Amount	8800000000	iso4217:USD	-8
60	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Exchange Contract [Member]	Derivative Notional Amount	11700000000	iso4217:USD	-8
61	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Notional Amount	11700000000	iso4217:USD	-8
62	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short [Member]	Derivative Notional Amount	11700000000	iso4217:USD	-8
63	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Exchange Contract [Member]	Derivative Notional Amount	10600000000	iso4217:USD	-8
64	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Notional Amount	10600000000	iso4217:USD	-8
65	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short [Member]	Derivative Notional Amount	10600000000	iso4217:USD	-8
66	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Interest Rate Contract [Member]	Derivative Notional Amount	328000000	iso4217:USD	-6
67	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Notional Amount	328000000	iso4217:USD	-6
68	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Long [Member]	Derivative Notional Amount	328000000	iso4217:USD	-6
69	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Interest Rate Contract [Member]	Derivative Notional Amount	233000000	iso4217:USD	-6
70	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Notional Amount	233000000	iso4217:USD	-6
71	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Long [Member]	Derivative Notional Amount	233000000	iso4217:USD	-6
72	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Interest Rate Contract [Member]	Derivative Notional Amount	2400000000	iso4217:USD	-8
73	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Notional Amount	2400000000	iso4217:USD	-8
74	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short [Member]	Derivative Notional Amount	2400000000	iso4217:USD	-8
75	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Interest Rate Contract [Member]	Derivative Notional Amount	352000000	iso4217:USD	-6
76	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Notional Amount	352000000	iso4217:USD	-6
77	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short [Member]	Derivative Notional Amount	352000000	iso4217:USD	-6
78	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Mortgage Backed Securities [Member]	Derivative Notional Amount	548000000	iso4217:USD	-6
79	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Notional Amount	548000000	iso4217:USD	-6
80	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Long [Member]	Derivative Notional Amount	548000000	iso4217:USD	-6
81	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Mortgage Backed Securities [Member]	Derivative Notional Amount	567000000	iso4217:USD	-6
82	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Notional Amount	567000000	iso4217:USD	-6
83	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Long [Member]	Derivative Notional Amount	567000000	iso4217:USD	-6
84	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Contract Type [Domain]	Financial Instrument Covenant Minimum Liquidity	1000000000	iso4217:USD	INF
85	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Longterm Debt Type [Domain]	Financial Instrument Covenant Minimum Liquidity	1000000000	iso4217:USD	INF
86	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Position [Domain]	Financial Instrument Covenant Minimum Liquidity	1000000000	iso4217:USD	INF
87	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Derivative Contract Type [Domain]	Financial Instrument Covenant Minimum Liquidity Requirement	1000000000	iso4217:USD	INF
88	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Longterm Debt Type [Domain]	Financial Instrument Covenant Minimum Liquidity Requirement	1000000000	iso4217:USD	INF
89	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Position [Domain]	Financial Instrument Covenant Minimum Liquidity Requirement	1000000000	iso4217:USD	INF
90	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Unsecured Debt [Member]	Debt Instrument Credit Rating	AAA
91	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Contract Type [Domain]	Foreign Currency Cash Flow Hedge Gain Loss To Be Reclassified During Next12 Months	130000000	iso4217:USD	-6
92	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Longterm Debt Type [Domain]	Foreign Currency Cash Flow Hedge Gain Loss To Be Reclassified During Next12 Months	130000000	iso4217:USD	-6
93	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Position [Domain]	Foreign Currency Cash Flow Hedge Gain Loss To Be Reclassified During Next12 Months	130000000	iso4217:USD	-6
94	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Derivative Contract Type [Domain]	Maximum Length Of Time Foreign Currency Cash Flow Hedge	_2221924
95	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Longterm Debt Type [Domain]	Maximum Length Of Time Foreign Currency Cash Flow Hedge	_2222514
96	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Position [Domain]	Maximum Length Of Time Foreign Currency Cash Flow Hedge	_2223104

Fact Table
Network	100640 - Disclosure - Fair Values of Derivative Instruments (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureFairValuesOfDerivativeInstrumentsDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Eligible For Offsetting [Member]	Derivative Assets Net Amounts Presented In Balance Sheet	-7000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity And Other Investments [Member]	Derivative Assets Net Amounts Presented In Balance Sheet	-7000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Assets Net Amounts Presented In Balance Sheet	0	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity And Other Investments [Member]	Derivative Assets Net Amounts Presented In Balance Sheet	0	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Eligible For Offsetting [Member]	Derivative Assets Net Amounts Presented In Balance Sheet	246000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Assets [Member]	Derivative Assets Net Amounts Presented In Balance Sheet	246000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Assets Net Amounts Presented In Balance Sheet	204000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Assets [Member]	Derivative Assets Net Amounts Presented In Balance Sheet	204000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Assets Net Amounts Presented In Balance Sheet	-2000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Assets [Member]	Derivative Assets Net Amounts Presented In Balance Sheet	-2000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Eligible For Offsetting [Member]	Derivative Assets Net Amounts Presented In Balance Sheet	-5000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Investments [Member]	Derivative Assets Net Amounts Presented In Balance Sheet	-5000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Assets Net Amounts Presented In Balance Sheet	80000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Investments [Member]	Derivative Assets Net Amounts Presented In Balance Sheet	80000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity And Other Investments [Member]	Derivative Assets Potential Net Amounts Not Presented In Balance Sheet	-7000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity And Other Investments [Member]	Derivative Assets Potential Net Amounts Not Presented In Balance Sheet	0	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Assets [Member]	Derivative Assets Potential Net Amounts Not Presented In Balance Sheet	246000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Assets [Member]	Derivative Assets Potential Net Amounts Not Presented In Balance Sheet	204000000	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Assets [Member]	Derivative Assets Potential Net Amounts Not Presented In Balance Sheet	-2000000	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Investments [Member]	Derivative Assets Potential Net Amounts Not Presented In Balance Sheet	-5000000	iso4217:USD	-6
21	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Investments [Member]	Derivative Assets Potential Net Amounts Not Presented In Balance Sheet	80000000	iso4217:USD	-6
22	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Eligible For Offsetting [Member]	Derivative Fair Value Of Derivative Asset Amount Not Offset	0	iso4217:USD	-6
23	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset Amount Not Offset	0	iso4217:USD	-6
24	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Fair Value Of Derivative Asset Amount Not Offset	0	iso4217:USD	-6
25	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset Amount Not Offset	0	iso4217:USD	-6
26	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Eligible For Offsetting [Member]	Derivative Fair Value Of Derivative Asset Amount Not Offset	0	iso4217:USD	-6
27	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset Amount Not Offset	0	iso4217:USD	-6
28	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Fair Value Of Derivative Asset Amount Not Offset	0	iso4217:USD	-6
29	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset Amount Not Offset	0	iso4217:USD	-6
30	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Fair Value Of Derivative Asset Amount Not Offset	0	iso4217:USD	-6
31	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Assets [Member]	Derivative Fair Value Of Derivative Asset Amount Not Offset	0	iso4217:USD	-6
32	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Eligible For Offsetting [Member]	Derivative Fair Value Of Derivative Asset Amount Not Offset	0	iso4217:USD	-6
33	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset Amount Not Offset	0	iso4217:USD	-6
34	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Fair Value Of Derivative Asset Amount Not Offset	0	iso4217:USD	-6
35	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset Amount Not Offset	0	iso4217:USD	-6
36	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Eligible For Offsetting [Member]	Derivative Fair Value Of Derivative Liability Amount Not Offset	0	iso4217:USD	-6
37	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability Amount Not Offset	0	iso4217:USD	-6
38	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Fair Value Of Derivative Liability Amount Not Offset	0	iso4217:USD	-6
39	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability Amount Not Offset	0	iso4217:USD	-6
40	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Fair Value Of Derivative Liability Amount Not Offset	0	iso4217:USD	-6
41	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Liabilities [Member]	Derivative Fair Value Of Derivative Liability Amount Not Offset	0	iso4217:USD	-6
42	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Eligible For Offsetting [Member]	Derivative Liabilities Net Amounts Presented In Balance Sheet	232000000	iso4217:USD	-6
43	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Liabilities [Member]	Derivative Liabilities Net Amounts Presented In Balance Sheet	232000000	iso4217:USD	-6
44	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Liabilities Net Amounts Presented In Balance Sheet	113000000	iso4217:USD	-6
45	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Liabilities [Member]	Derivative Liabilities Net Amounts Presented In Balance Sheet	113000000	iso4217:USD	-6
46	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Liabilities Net Amounts Presented In Balance Sheet	1000000	iso4217:USD	-6
47	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Liabilities [Member]	Derivative Liabilities Net Amounts Presented In Balance Sheet	1000000	iso4217:USD	-6
48	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Liabilities [Member]	Derivative Liabilities Potential Net Amounts Not Presented In Balance Sheet	482000000	iso4217:USD	-6
49	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Liabilities [Member]	Derivative Liabilities Potential Net Amounts Not Presented In Balance Sheet	341000000	iso4217:USD	-6
50	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Liabilities [Member]	Derivative Liabilities Potential Net Amounts Not Presented In Balance Sheet	1000000	iso4217:USD	-6
51	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Eligible For Offsetting [Member]	Derivative Asset Fair Value Gross Liability	25000000	iso4217:USD	-6
52	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity And Other Investments [Member]	Derivative Asset Fair Value Gross Liability	25000000	iso4217:USD	-6
53	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Asset Fair Value Gross Liability	67000000	iso4217:USD	-6
54	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity And Other Investments [Member]	Derivative Asset Fair Value Gross Liability	67000000	iso4217:USD	-6
55	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Eligible For Offsetting [Member]	Derivative Asset Fair Value Gross Liability	302000000	iso4217:USD	-6
56	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Assets [Member]	Derivative Asset Fair Value Gross Liability	302000000	iso4217:USD	-6
57	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Asset Fair Value Gross Liability	132000000	iso4217:USD	-6
58	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Assets [Member]	Derivative Asset Fair Value Gross Liability	132000000	iso4217:USD	-6
59	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Asset Fair Value Gross Liability	8000000	iso4217:USD	-6
60	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Assets [Member]	Derivative Asset Fair Value Gross Liability	8000000	iso4217:USD	-6
61	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Eligible For Offsetting [Member]	Derivative Asset Fair Value Gross Liability	74000000	iso4217:USD	-6
62	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Investments [Member]	Derivative Asset Fair Value Gross Liability	74000000	iso4217:USD	-6
63	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Asset Fair Value Gross Liability	20000000	iso4217:USD	-6
64	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Investments [Member]	Derivative Asset Fair Value Gross Liability	20000000	iso4217:USD	-6
65	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Eligible For Offsetting [Member]	Derivative Collateral Obligation To Return Cash	250000000	iso4217:USD	-6
66	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Liabilities [Member]	Derivative Collateral Obligation To Return Cash	250000000	iso4217:USD	-6
67	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Collateral Obligation To Return Cash	228000000	iso4217:USD	-6
68	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Liabilities [Member]	Derivative Collateral Obligation To Return Cash	228000000	iso4217:USD	-6
69	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Collateral Obligation To Return Cash	0	iso4217:USD	-6
70	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Liabilities [Member]	Derivative Collateral Obligation To Return Cash	0	iso4217:USD	-6
71	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Eligible For Offsetting [Member]	Derivative Collateral Right To Reclaim Cash	0	iso4217:USD	-6
72	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity And Other Investments [Member]	Derivative Collateral Right To Reclaim Cash	0	iso4217:USD	-6
73	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Collateral Right To Reclaim Cash	0	iso4217:USD	-6
74	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity And Other Investments [Member]	Derivative Collateral Right To Reclaim Cash	0	iso4217:USD	-6
75	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Eligible For Offsetting [Member]	Derivative Collateral Right To Reclaim Cash	0	iso4217:USD	-6
76	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Assets [Member]	Derivative Collateral Right To Reclaim Cash	0	iso4217:USD	-6
77	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Collateral Right To Reclaim Cash	0	iso4217:USD	-6
78	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Assets [Member]	Derivative Collateral Right To Reclaim Cash	0	iso4217:USD	-6
79	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Collateral Right To Reclaim Cash	0	iso4217:USD	-6
80	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Assets [Member]	Derivative Collateral Right To Reclaim Cash	0	iso4217:USD	-6
81	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Eligible For Offsetting [Member]	Derivative Collateral Right To Reclaim Cash	0	iso4217:USD	-6
82	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Investments [Member]	Derivative Collateral Right To Reclaim Cash	0	iso4217:USD	-6
83	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Collateral Right To Reclaim Cash	0	iso4217:USD	-6
84	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Investments [Member]	Derivative Collateral Right To Reclaim Cash	0	iso4217:USD	-6
85	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Eligible For Offsetting [Member]	Derivative Fair Value Of Derivative Asset	18000000	iso4217:USD	-6
86	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset	18000000	iso4217:USD	-6
87	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Fair Value Of Derivative Asset	67000000	iso4217:USD	-6
88	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset	67000000	iso4217:USD	-6
89	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Eligible For Offsetting [Member]	Derivative Fair Value Of Derivative Asset	548000000	iso4217:USD	-6
90	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset	548000000	iso4217:USD	-6
91	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Fair Value Of Derivative Asset	336000000	iso4217:USD	-6
92	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset	336000000	iso4217:USD	-6
93	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Fair Value Of Derivative Asset	6000000	iso4217:USD	-6
94	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Assets [Member]	Derivative Fair Value Of Derivative Asset	6000000	iso4217:USD	-6
95	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Eligible For Offsetting [Member]	Derivative Fair Value Of Derivative Asset	69000000	iso4217:USD	-6
96	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset	69000000	iso4217:USD	-6
97	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Fair Value Of Derivative Asset	100000000	iso4217:USD	-6
98	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset	100000000	iso4217:USD	-6
99	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset	18000000	iso4217:USD	-6
100	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset	67000000	iso4217:USD	-6
101	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
102	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Credit Risk Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
103	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
104	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
105	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Credit Risk Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
106	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
107	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset	18000000	iso4217:USD	-6
108	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Asset	18000000	iso4217:USD	-6
109	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	18000000	iso4217:USD	-6
110	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset	67000000	iso4217:USD	-6
111	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Asset	67000000	iso4217:USD	-6
112	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	67000000	iso4217:USD	-6
113	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
114	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
115	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
116	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
117	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
118	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
119	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
120	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
121	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
122	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
123	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
124	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
125	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
126	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
127	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
128	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
129	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
130	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
131	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
132	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Interest Rate Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
133	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
134	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
135	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Interest Rate Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
136	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
137	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset	18000000	iso4217:USD	-6
138	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	18000000	iso4217:USD	-6
139	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset	67000000	iso4217:USD	-6
140	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	67000000	iso4217:USD	-6
141	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
142	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
143	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
144	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
145	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset	548000000	iso4217:USD	-6
146	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset	336000000	iso4217:USD	-6
147	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
148	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Credit Risk Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
149	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
150	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
151	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Credit Risk Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
152	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
153	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
154	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
155	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
156	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
157	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
158	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
159	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
160	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
161	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
162	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
163	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
164	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
165	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset	392000000	iso4217:USD	-6
166	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Asset	392000000	iso4217:USD	-6
167	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	392000000	iso4217:USD	-6
168	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset	133000000	iso4217:USD	-6
169	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Asset	133000000	iso4217:USD	-6
170	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	133000000	iso4217:USD	-6
171	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset	156000000	iso4217:USD	-6
172	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Asset	156000000	iso4217:USD	-6
173	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	156000000	iso4217:USD	-6
174	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset	203000000	iso4217:USD	-6
175	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Asset	203000000	iso4217:USD	-6
176	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	203000000	iso4217:USD	-6
177	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
178	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Interest Rate Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
179	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
180	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
181	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Interest Rate Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
182	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
183	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset	392000000	iso4217:USD	-6
184	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	392000000	iso4217:USD	-6
185	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset	133000000	iso4217:USD	-6
186	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	133000000	iso4217:USD	-6
187	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset	156000000	iso4217:USD	-6
188	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	156000000	iso4217:USD	-6
189	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset	203000000	iso4217:USD	-6
190	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	203000000	iso4217:USD	-6
191	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Assets [Member]	Derivative Fair Value Of Derivative Asset	6000000	iso4217:USD	-6
192	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Assets [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
193	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Credit Risk Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
194	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
195	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Assets [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
196	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
197	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
198	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Assets [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
199	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
200	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
201	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Assets [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
202	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
203	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
204	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Assets [Member]	Derivative Fair Value Of Derivative Asset	6000000	iso4217:USD	-6
205	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Asset	6000000	iso4217:USD	-6
206	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	6000000	iso4217:USD	-6
207	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Assets [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
208	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Interest Rate Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
209	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
210	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Assets [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
211	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
212	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Assets [Member]	Derivative Fair Value Of Derivative Asset	6000000	iso4217:USD	-6
213	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	6000000	iso4217:USD	-6
214	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset	73000000	iso4217:USD	-6
215	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset	100000000	iso4217:USD	-6
216	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset	6000000	iso4217:USD	-6
217	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Credit Risk Contract [Member]	Derivative Fair Value Of Derivative Asset	6000000	iso4217:USD	-6
218	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	6000000	iso4217:USD	-6
219	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset	5000000	iso4217:USD	-6
220	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Credit Risk Contract [Member]	Derivative Fair Value Of Derivative Asset	5000000	iso4217:USD	-6
221	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	5000000	iso4217:USD	-6
222	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
223	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
224	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
225	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
226	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
227	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
228	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset	23000000	iso4217:USD	-6
229	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Asset	23000000	iso4217:USD	-6
230	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	23000000	iso4217:USD	-6
231	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset	3000000	iso4217:USD	-6
232	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Asset	3000000	iso4217:USD	-6
233	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	3000000	iso4217:USD	-6
234	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset	1000000	iso4217:USD	-6
235	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Asset	1000000	iso4217:USD	-6
236	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	1000000	iso4217:USD	-6
237	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset	80000000	iso4217:USD	-6
238	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Asset	80000000	iso4217:USD	-6
239	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	80000000	iso4217:USD	-6
240	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset	33000000	iso4217:USD	-6
241	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Asset	33000000	iso4217:USD	-6
242	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	33000000	iso4217:USD	-6
243	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset	9000000	iso4217:USD	-6
244	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Asset	9000000	iso4217:USD	-6
245	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	9000000	iso4217:USD	-6
246	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset	10000000	iso4217:USD	-6
247	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Interest Rate Contract [Member]	Derivative Fair Value Of Derivative Asset	10000000	iso4217:USD	-6
248	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	10000000	iso4217:USD	-6
249	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset	3000000	iso4217:USD	-6
250	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Interest Rate Contract [Member]	Derivative Fair Value Of Derivative Asset	3000000	iso4217:USD	-6
251	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	3000000	iso4217:USD	-6
252	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset	1000000	iso4217:USD	-6
253	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	1000000	iso4217:USD	-6
254	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset	80000000	iso4217:USD	-6
255	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	80000000	iso4217:USD	-6
256	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset	72000000	iso4217:USD	-6
257	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	72000000	iso4217:USD	-6
258	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset	20000000	iso4217:USD	-6
259	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	20000000	iso4217:USD	-6
260	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Eligible For Offsetting [Member]	Derivative Fair Value Of Derivative Liability	630000000	iso4217:USD	-6
261	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability	630000000	iso4217:USD	-6
262	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Fair Value Of Derivative Liability	334000000	iso4217:USD	-6
263	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability	334000000	iso4217:USD	-6
264	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Fair Value Of Derivative Liability	8000000	iso4217:USD	-6
265	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Liabilities [Member]	Derivative Fair Value Of Derivative Liability	8000000	iso4217:USD	-6
266	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability	630000000	iso4217:USD	-6
267	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability	337000000	iso4217:USD	-6
268	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability	5000000	iso4217:USD	-6
269	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Credit Risk Contract [Member]	Derivative Fair Value Of Derivative Liability	5000000	iso4217:USD	-6
270	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Liability	5000000	iso4217:USD	-6
271	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability	1000000	iso4217:USD	-6
272	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Credit Risk Contract [Member]	Derivative Fair Value Of Derivative Liability	1000000	iso4217:USD	-6
273	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Liability	1000000	iso4217:USD	-6
274	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability	25000000	iso4217:USD	-6
275	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Liability	25000000	iso4217:USD	-6
276	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Liability	25000000	iso4217:USD	-6
277	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability	186000000	iso4217:USD	-6
278	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Liability	186000000	iso4217:USD	-6
279	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Liability	186000000	iso4217:USD	-6
280	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability	16000000	iso4217:USD	-6
281	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Liability	16000000	iso4217:USD	-6
282	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Liability	16000000	iso4217:USD	-6
283	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability	6000000	iso4217:USD	-6
284	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Liability	6000000	iso4217:USD	-6
285	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Liability	6000000	iso4217:USD	-6
286	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability	263000000	iso4217:USD	-6
287	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Liability	263000000	iso4217:USD	-6
288	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Liability	263000000	iso4217:USD	-6
289	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability	3000000	iso4217:USD	-6
290	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Liability	3000000	iso4217:USD	-6
291	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Liability	3000000	iso4217:USD	-6
292	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability	296000000	iso4217:USD	-6
293	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Liability	296000000	iso4217:USD	-6
294	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Liability	296000000	iso4217:USD	-6
295	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability	134000000	iso4217:USD	-6
296	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Liability	134000000	iso4217:USD	-6
297	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Liability	134000000	iso4217:USD	-6
298	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability	25000000	iso4217:USD	-6
299	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Interest Rate Contract [Member]	Derivative Fair Value Of Derivative Liability	25000000	iso4217:USD	-6
300	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Liability	25000000	iso4217:USD	-6
301	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability	7000000	iso4217:USD	-6
302	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Interest Rate Contract [Member]	Derivative Fair Value Of Derivative Liability	7000000	iso4217:USD	-6
303	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Liability	7000000	iso4217:USD	-6
304	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability	288000000	iso4217:USD	-6
305	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Liability	288000000	iso4217:USD	-6
306	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability	189000000	iso4217:USD	-6
307	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Liability	189000000	iso4217:USD	-6
308	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability	342000000	iso4217:USD	-6
309	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Liability	342000000	iso4217:USD	-6
310	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability	148000000	iso4217:USD	-6
311	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Liability	148000000	iso4217:USD	-6
312	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Liabilities [Member]	Derivative Fair Value Of Derivative Liability	8000000	iso4217:USD	-6
313	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Liabilities [Member]	Derivative Fair Value Of Derivative Liability	0	iso4217:USD	-6
314	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Credit Risk Contract [Member]	Derivative Fair Value Of Derivative Liability	0	iso4217:USD	-6
315	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Liability	0	iso4217:USD	-6
316	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Liabilities [Member]	Derivative Fair Value Of Derivative Liability	0	iso4217:USD	-6
317	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Liability	0	iso4217:USD	-6
318	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Liability	0	iso4217:USD	-6
319	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Liabilities [Member]	Derivative Fair Value Of Derivative Liability	0	iso4217:USD	-6
320	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Liability	0	iso4217:USD	-6
321	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Liability	0	iso4217:USD	-6
322	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Liabilities [Member]	Derivative Fair Value Of Derivative Liability	0	iso4217:USD	-6
323	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Liability	0	iso4217:USD	-6
324	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Liability	0	iso4217:USD	-6
325	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Liabilities [Member]	Derivative Fair Value Of Derivative Liability	8000000	iso4217:USD	-6
326	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Liability	8000000	iso4217:USD	-6
327	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Liability	8000000	iso4217:USD	-6
328	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Liabilities [Member]	Derivative Fair Value Of Derivative Liability	0	iso4217:USD	-6
329	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Interest Rate Contract [Member]	Derivative Fair Value Of Derivative Liability	0	iso4217:USD	-6
330	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Liability	0	iso4217:USD	-6
331	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Liabilities [Member]	Derivative Fair Value Of Derivative Liability	0	iso4217:USD	-6
332	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Liability	0	iso4217:USD	-6
333	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Liabilities [Member]	Derivative Fair Value Of Derivative Liability	8000000	iso4217:USD	-6
334	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Liability	8000000	iso4217:USD	-6
335	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Eligible For Offsetting [Member]	Derivative Liability Fair Value Gross Asset	398000000	iso4217:USD	-6
336	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Liabilities [Member]	Derivative Liability Fair Value Gross Asset	398000000	iso4217:USD	-6
337	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Liability Fair Value Gross Asset	221000000	iso4217:USD	-6
338	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Liabilities [Member]	Derivative Liability Fair Value Gross Asset	221000000	iso4217:USD	-6
339	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Eligible For Offsetting [Member]	Derivative Liability Fair Value Gross Asset	7000000	iso4217:USD	-6
340	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Liabilities [Member]	Derivative Liability Fair Value Gross Asset	7000000	iso4217:USD	-6

Fact Table
Network	100650 - Disclosure - Gains (Losses) on Fair Value Hedges and Related Hedged Items (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureGainsLossesOnFairValueHedgesAndRelatedHedgedItemsDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Equity Contract [Member]	Change In Unrealized Gain Loss On Fair Value Hedging Instruments1	-107000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Equity Contract [Member]	Change In Unrealized Gain Loss On Fair Value Hedging Instruments1	-76000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Equity Contract [Member]	Change In Unrealized Gain Loss On Fair Value Hedging Instruments1	-74000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Foreign Exchange Contract [Member]	Change In Unrealized Gain Loss On Fair Value Hedging Instruments1	741000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Foreign Exchange Contract [Member]	Change In Unrealized Gain Loss On Fair Value Hedging Instruments1	-797000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Foreign Exchange Contract [Member]	Change In Unrealized Gain Loss On Fair Value Hedging Instruments1	441000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Equity Contract [Member]	Change In Unrealized Gain Loss On Hedged Item In Fair Value Hedge1	107000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Equity Contract [Member]	Change In Unrealized Gain Loss On Hedged Item In Fair Value Hedge1	76000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Equity Contract [Member]	Change In Unrealized Gain Loss On Hedged Item In Fair Value Hedge1	74000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Foreign Exchange Contract [Member]	Change In Unrealized Gain Loss On Hedged Item In Fair Value Hedge1	-725000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Foreign Exchange Contract [Member]	Change In Unrealized Gain Loss On Hedged Item In Fair Value Hedge1	838000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Foreign Exchange Contract [Member]	Change In Unrealized Gain Loss On Hedged Item In Fair Value Hedge1	-386000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Equity Contract [Member]	Gain Loss From Components Excluded From Assessment Of Fair Value Hedge Effectiveness Net	0	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Equity Contract [Member]	Gain Loss From Components Excluded From Assessment Of Fair Value Hedge Effectiveness Net	-10000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Equity Contract [Member]	Gain Loss From Components Excluded From Assessment Of Fair Value Hedge Effectiveness Net	-80000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Equity Contract [Member]	Gain Loss On Fair Value Hedge Ineffectiveness Net	0	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Equity Contract [Member]	Gain Loss On Fair Value Hedge Ineffectiveness Net	0	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Equity Contract [Member]	Gain Loss On Fair Value Hedge Ineffectiveness Net	0	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Foreign Exchange Contract [Member]	Gain Loss On Fair Value Hedge Ineffectiveness Net	16000000	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Foreign Exchange Contract [Member]	Gain Loss On Fair Value Hedge Ineffectiveness Net	41000000	iso4217:USD	-6
21	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Foreign Exchange Contract [Member]	Gain Loss On Fair Value Hedge Ineffectiveness Net	55000000	iso4217:USD	-6

Fact Table
Network	100660 - Disclosure - Gains (Losses) Related to Cash Flow Hedges (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureGainsLossesRelatedToCashFlowHedgesDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Foreign Exchange Contract [Member]	Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net	-346000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Designated As Hedging Instrument [Member]	Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net	-346000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Foreign Exchange Contract [Member]	Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net	-354000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Designated As Hedging Instrument [Member]	Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net	-354000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Foreign Exchange Contract [Member]	Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net	-389000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Designated As Hedging Instrument [Member]	Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net	-389000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Foreign Exchange Contract [Member]	Foreign Currency Cash Flow Hedge Gain Loss Reclassified To Earnings Net	608000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Designated As Hedging Instrument [Member]	Foreign Currency Cash Flow Hedge Gain Loss Reclassified To Earnings Net	608000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Foreign Exchange Contract [Member]	Foreign Currency Cash Flow Hedge Gain Loss Reclassified To Earnings Net	625000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Designated As Hedging Instrument [Member]	Foreign Currency Cash Flow Hedge Gain Loss Reclassified To Earnings Net	625000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Foreign Exchange Contract [Member]	Foreign Currency Cash Flow Hedge Gain Loss Reclassified To Earnings Net	555000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Designated As Hedging Instrument [Member]	Foreign Currency Cash Flow Hedge Gain Loss Reclassified To Earnings Net	555000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Foreign Exchange Contract [Member]	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax	1152000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Designated As Hedging Instrument [Member]	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax	1152000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Foreign Exchange Contract [Member]	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax	351000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Designated As Hedging Instrument [Member]	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax	351000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Foreign Exchange Contract [Member]	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax	328000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Designated As Hedging Instrument [Member]	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax	328000000	iso4217:USD	-6

Fact Table
Network	100670 - Disclosure - Gains (Losses) Related to Cash Flow Hedges (Parenthetical) (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureGainsLossesRelatedToCashFlowHedgesParentheticalDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Foreign Exchange Contract [Member]	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax	35000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Designated As Hedging Instrument [Member]	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax	35000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Foreign Exchange Contract [Member]	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax	24000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Designated As Hedging Instrument [Member]	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax	24000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Foreign Exchange Contract [Member]	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax	4000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Designated As Hedging Instrument [Member]	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax	4000000	iso4217:USD	-6

Fact Table
Network	100680 - Disclosure - Non-Designated Derivative Gains (Losses) (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureNonDesignatedDerivativeGainsLossesDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Commodity Contract [Member]	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net	-223000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Commodity Contract [Member]	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net	-87000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Commodity Contract [Member]	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net	-22000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Credit Risk Contract [Member]	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net	-1000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Credit Risk Contract [Member]	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net	-1000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Credit Risk Contract [Member]	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net	5000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Equity Contract [Member]	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net	-19000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Equity Contract [Member]	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net	-21000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Equity Contract [Member]	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net	-114000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Foreign Exchange Contract [Member]	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net	-483000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Foreign Exchange Contract [Member]	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net	-55000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Foreign Exchange Contract [Member]	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net	-117000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Interest Rate Contract [Member]	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net	23000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Interest Rate Contract [Member]	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net	10000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Interest Rate Contract [Member]	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net	14000000	iso4217:USD	-6

Fact Table
Network	100690 - Disclosure - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Right Of Offset And Netting [Domain]	us-gaap:AssetsFairValueDisclosureRecurring (label)	119019000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation By Asset Class [Domain]	us-gaap:AssetsFairValueDisclosureRecurring (label)	119019000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Measurements Fair Value Hierarchy [Domain]	us-gaap:AssetsFairValueDisclosureRecurring (label)	119019000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation By Liability Class [Domain]	us-gaap:AssetsFairValueDisclosureRecurring (label)	119019000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Right Of Offset And Netting [Domain]	us-gaap:AssetsFairValueDisclosureRecurring (label)	133985000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation By Asset Class [Domain]	us-gaap:AssetsFairValueDisclosureRecurring (label)	133985000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Measurements Fair Value Hierarchy [Domain]	us-gaap:AssetsFairValueDisclosureRecurring (label)	133985000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation By Liability Class [Domain]	us-gaap:AssetsFairValueDisclosureRecurring (label)	133985000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	119420000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	134212000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	4803000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	4803000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	3934000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	3934000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level1 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level1 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
21	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	4803000000	iso4217:USD	-6
22	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	4803000000	iso4217:USD	-6
23	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level2 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	4803000000	iso4217:USD	-6
24	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	3934000000	iso4217:USD	-6
25	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	3934000000	iso4217:USD	-6
26	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level2 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	3934000000	iso4217:USD	-6
27	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
28	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
29	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level3 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
30	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
31	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
32	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level3 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
33	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1000000000	iso4217:USD	-6
34	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Certificates Of Deposit [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1000000000	iso4217:USD	-6
35	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1358000000	iso4217:USD	-6
36	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Certificates Of Deposit [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1358000000	iso4217:USD	-6
37	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
38	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Certificates Of Deposit [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
39	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level1 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
40	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
41	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Certificates Of Deposit [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
42	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level1 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
43	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1000000000	iso4217:USD	-6
44	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Certificates Of Deposit [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1000000000	iso4217:USD	-6
45	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level2 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1000000000	iso4217:USD	-6
46	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1358000000	iso4217:USD	-6
47	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Certificates Of Deposit [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1358000000	iso4217:USD	-6
48	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level2 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1358000000	iso4217:USD	-6
49	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
50	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Certificates Of Deposit [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
51	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level3 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
52	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
53	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Certificates Of Deposit [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
54	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level3 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
55	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	298000000	iso4217:USD	-6
56	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	298000000	iso4217:USD	-6
57	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	319000000	iso4217:USD	-6
58	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commercial Paper [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	319000000	iso4217:USD	-6
59	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
60	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
61	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level1 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
62	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
63	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commercial Paper [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
64	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level1 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
65	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	298000000	iso4217:USD	-6
66	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	298000000	iso4217:USD	-6
67	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level2 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	298000000	iso4217:USD	-6
68	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	319000000	iso4217:USD	-6
69	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commercial Paper [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	319000000	iso4217:USD	-6
70	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level2 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	319000000	iso4217:USD	-6
71	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
72	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
73	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level3 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
74	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
75	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commercial Paper [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
76	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level3 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
77	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	6362000000	iso4217:USD	-6
78	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	6362000000	iso4217:USD	-6
79	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	4830000000	iso4217:USD	-6
80	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	4830000000	iso4217:USD	-6
81	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
82	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
83	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level1 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
84	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
85	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
86	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level1 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
87	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	6361000000	iso4217:USD	-6
88	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	6361000000	iso4217:USD	-6
89	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level2 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	6361000000	iso4217:USD	-6
90	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	4829000000	iso4217:USD	-6
91	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	4829000000	iso4217:USD	-6
92	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level2 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	4829000000	iso4217:USD	-6
93	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1000000	iso4217:USD	-6
94	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1000000	iso4217:USD	-6
95	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level3 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1000000	iso4217:USD	-6
96	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1000000	iso4217:USD	-6
97	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1000000	iso4217:USD	-6
98	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level3 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1000000	iso4217:USD	-6
99	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	639000000	iso4217:USD	-6
100	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Derivative Financial Instruments Assets [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	639000000	iso4217:USD	-6
101	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	509000000	iso4217:USD	-6
102	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Financial Instruments Assets [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	509000000	iso4217:USD	-6
103	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	6000000	iso4217:USD	-6
104	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Derivative Financial Instruments Assets [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	6000000	iso4217:USD	-6
105	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level1 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	6000000	iso4217:USD	-6
106	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1000000	iso4217:USD	-6
107	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Financial Instruments Assets [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1000000	iso4217:USD	-6
108	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level1 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1000000	iso4217:USD	-6
109	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	633000000	iso4217:USD	-6
110	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Derivative Financial Instruments Assets [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	633000000	iso4217:USD	-6
111	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level2 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	633000000	iso4217:USD	-6
112	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	508000000	iso4217:USD	-6
113	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Financial Instruments Assets [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	508000000	iso4217:USD	-6
114	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level2 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	508000000	iso4217:USD	-6
115	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
116	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Derivative Financial Instruments Assets [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
117	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level3 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
118	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
119	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Financial Instruments Assets [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
120	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level3 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
121	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	9050000000	iso4217:USD	-6
122	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	9050000000	iso4217:USD	-6
123	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	4426000000	iso4217:USD	-6
124	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	4426000000	iso4217:USD	-6
125	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	6918000000	iso4217:USD	-6
126	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	6918000000	iso4217:USD	-6
127	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level1 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	6918000000	iso4217:USD	-6
128	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	2414000000	iso4217:USD	-6
129	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	2414000000	iso4217:USD	-6
130	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level1 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	2414000000	iso4217:USD	-6
131	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	2114000000	iso4217:USD	-6
132	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	2114000000	iso4217:USD	-6
133	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level2 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	2114000000	iso4217:USD	-6
134	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1994000000	iso4217:USD	-6
135	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1994000000	iso4217:USD	-6
136	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level2 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1994000000	iso4217:USD	-6
137	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	18000000	iso4217:USD	-6
138	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	18000000	iso4217:USD	-6
139	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level3 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	18000000	iso4217:USD	-6
140	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	18000000	iso4217:USD	-6
141	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	18000000	iso4217:USD	-6
142	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level3 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	18000000	iso4217:USD	-6
143	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	5715000000	iso4217:USD	-6
144	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	5715000000	iso4217:USD	-6
145	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	5187000000	iso4217:USD	-6
146	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	5187000000	iso4217:USD	-6
147	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	10000000	iso4217:USD	-6
148	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	10000000	iso4217:USD	-6
149	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level1 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	10000000	iso4217:USD	-6
150	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
151	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
152	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level1 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
153	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	5705000000	iso4217:USD	-6
154	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	5705000000	iso4217:USD	-6
155	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level2 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	5705000000	iso4217:USD	-6
156	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	5187000000	iso4217:USD	-6
157	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	5187000000	iso4217:USD	-6
158	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level2 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	5187000000	iso4217:USD	-6
159	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
160	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
161	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level3 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
162	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
163	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
164	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level3 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
165	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1012000000	iso4217:USD	-6
166	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Money Market Funds [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1012000000	iso4217:USD	-6
167	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1478000000	iso4217:USD	-6
168	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Money Market Funds [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1478000000	iso4217:USD	-6
169	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1012000000	iso4217:USD	-6
170	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Money Market Funds [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1012000000	iso4217:USD	-6
171	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level1 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1012000000	iso4217:USD	-6
172	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1478000000	iso4217:USD	-6
173	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Money Market Funds [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1478000000	iso4217:USD	-6
174	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level1 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1478000000	iso4217:USD	-6
175	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
176	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Money Market Funds [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
177	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level2 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
178	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
179	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Money Market Funds [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
180	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level2 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
181	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
182	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Money Market Funds [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
183	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level3 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
184	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
185	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Money Market Funds [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
186	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level3 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
187	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	90199000000	iso4217:USD	-6
188	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	us-gaap:AssetsFairValueDisclosureRecurring (label)	90199000000	iso4217:USD	-6
189	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	111844000000	iso4217:USD	-6
190	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	us-gaap:AssetsFairValueDisclosureRecurring (label)	111844000000	iso4217:USD	-6
191	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	86492000000	iso4217:USD	-6
192	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	us-gaap:AssetsFairValueDisclosureRecurring (label)	86492000000	iso4217:USD	-6
193	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level1 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	86492000000	iso4217:USD	-6
194	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	109228000000	iso4217:USD	-6
195	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	us-gaap:AssetsFairValueDisclosureRecurring (label)	109228000000	iso4217:USD	-6
196	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level1 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	109228000000	iso4217:USD	-6
197	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	3707000000	iso4217:USD	-6
198	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	us-gaap:AssetsFairValueDisclosureRecurring (label)	3707000000	iso4217:USD	-6
199	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level2 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	3707000000	iso4217:USD	-6
200	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	2616000000	iso4217:USD	-6
201	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	us-gaap:AssetsFairValueDisclosureRecurring (label)	2616000000	iso4217:USD	-6
202	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level2 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	2616000000	iso4217:USD	-6
203	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
204	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
205	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level3 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
206	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
207	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
208	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level3 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
209	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	342000000	iso4217:USD	-6
210	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S States And Political Subdivisions [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	342000000	iso4217:USD	-6
211	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	327000000	iso4217:USD	-6
212	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S States And Political Subdivisions [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	327000000	iso4217:USD	-6
213	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
214	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S States And Political Subdivisions [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
215	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level1 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
216	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
217	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S States And Political Subdivisions [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
218	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level1 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
219	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	342000000	iso4217:USD	-6
220	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S States And Political Subdivisions [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	342000000	iso4217:USD	-6
221	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level2 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	342000000	iso4217:USD	-6
222	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	327000000	iso4217:USD	-6
223	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S States And Political Subdivisions [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	327000000	iso4217:USD	-6
224	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level2 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	327000000	iso4217:USD	-6
225	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
226	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S States And Political Subdivisions [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
227	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level3 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
228	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
229	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S States And Political Subdivisions [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
230	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level3 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
231	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	94438000000	iso4217:USD	-6
232	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level1 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	94438000000	iso4217:USD	-6
233	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	113121000000	iso4217:USD	-6
234	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level1 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	113121000000	iso4217:USD	-6
235	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	24963000000	iso4217:USD	-6
236	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level2 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	24963000000	iso4217:USD	-6
237	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	21072000000	iso4217:USD	-6
238	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level2 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	21072000000	iso4217:USD	-6
239	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	19000000	iso4217:USD	-6
240	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level3 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	19000000	iso4217:USD	-6
241	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	19000000	iso4217:USD	-6
242	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level3 [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	19000000	iso4217:USD	-6
243	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Net [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	119019000000	iso4217:USD	-6
244	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Net [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	133985000000	iso4217:USD	-6
245	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Net [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	4803000000	iso4217:USD	-6
246	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	4803000000	iso4217:USD	-6
247	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Net [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	3934000000	iso4217:USD	-6
248	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	3934000000	iso4217:USD	-6
249	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Net [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1000000000	iso4217:USD	-6
250	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Certificates Of Deposit [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1000000000	iso4217:USD	-6
251	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Net [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1358000000	iso4217:USD	-6
252	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Certificates Of Deposit [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1358000000	iso4217:USD	-6
253	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Net [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	298000000	iso4217:USD	-6
254	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	298000000	iso4217:USD	-6
255	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Net [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	319000000	iso4217:USD	-6
256	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commercial Paper [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	319000000	iso4217:USD	-6
257	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Net [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	6362000000	iso4217:USD	-6
258	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	6362000000	iso4217:USD	-6
259	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Net [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	4830000000	iso4217:USD	-6
260	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	4830000000	iso4217:USD	-6
261	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Net [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	238000000	iso4217:USD	-6
262	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Derivative Financial Instruments Assets [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	238000000	iso4217:USD	-6
263	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Net [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	282000000	iso4217:USD	-6
264	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Financial Instruments Assets [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	282000000	iso4217:USD	-6
265	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Net [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	9050000000	iso4217:USD	-6
266	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	9050000000	iso4217:USD	-6
267	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Net [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	4426000000	iso4217:USD	-6
268	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	4426000000	iso4217:USD	-6
269	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Net [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	5715000000	iso4217:USD	-6
270	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	5715000000	iso4217:USD	-6
271	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Net [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	5187000000	iso4217:USD	-6
272	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	5187000000	iso4217:USD	-6
273	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Net [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1012000000	iso4217:USD	-6
274	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Money Market Funds [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1012000000	iso4217:USD	-6
275	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Net [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1478000000	iso4217:USD	-6
276	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Money Market Funds [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	1478000000	iso4217:USD	-6
277	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Net [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	90199000000	iso4217:USD	-6
278	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	us-gaap:AssetsFairValueDisclosureRecurring (label)	90199000000	iso4217:USD	-6
279	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Net [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	111844000000	iso4217:USD	-6
280	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	us-gaap:AssetsFairValueDisclosureRecurring (label)	111844000000	iso4217:USD	-6
281	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Net [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	342000000	iso4217:USD	-6
282	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S States And Political Subdivisions [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	342000000	iso4217:USD	-6
283	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Net [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	327000000	iso4217:USD	-6
284	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S States And Political Subdivisions [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	327000000	iso4217:USD	-6
285	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Netting [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	-401000000	iso4217:USD	-6
286	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Netting [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	-227000000	iso4217:USD	-6
287	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Netting [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
288	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
289	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Netting [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
290	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
291	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Netting [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
292	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Certificates Of Deposit [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
293	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Netting [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
294	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Certificates Of Deposit [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
295	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Netting [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
296	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
297	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Netting [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
298	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commercial Paper [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
299	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Netting [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
300	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
301	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Netting [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
302	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
303	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Netting [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	-401000000	iso4217:USD	-6
304	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Derivative Financial Instruments Assets [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	-401000000	iso4217:USD	-6
305	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Netting [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	-227000000	iso4217:USD	-6
306	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Financial Instruments Assets [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	-227000000	iso4217:USD	-6
307	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Netting [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
308	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
309	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Netting [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
310	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
311	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Netting [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
312	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
313	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Netting [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
314	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
315	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Netting [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
316	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Money Market Funds [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
317	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Netting [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
318	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Money Market Funds [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
319	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Netting [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
320	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
321	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Netting [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
322	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:USGovernmentAgenciesDebtSecuritiesMember (label)	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
323	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Netting [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
324	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S States And Political Subdivisions [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
325	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Netting [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
326	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S States And Political Subdivisions [Member]	us-gaap:AssetsFairValueDisclosureRecurring (label)	0	iso4217:USD	-6
327	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	Liabilities Fair Value Disclosure Recurring	17000000	iso4217:USD	-6
328	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level1 [Member]	Liabilities Fair Value Disclosure Recurring	17000000	iso4217:USD	-6
329	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Derivative Financial Instruments Liabilities [Member]	Liabilities Fair Value Disclosure Recurring	17000000	iso4217:USD	-6
330	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	Liabilities Fair Value Disclosure Recurring	0	iso4217:USD	-6
331	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level1 [Member]	Liabilities Fair Value Disclosure Recurring	0	iso4217:USD	-6
332	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Financial Instruments Liabilities [Member]	Liabilities Fair Value Disclosure Recurring	0	iso4217:USD	-6
333	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	Liabilities Fair Value Disclosure Recurring	613000000	iso4217:USD	-6
334	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level2 [Member]	Liabilities Fair Value Disclosure Recurring	613000000	iso4217:USD	-6
335	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Derivative Financial Instruments Liabilities [Member]	Liabilities Fair Value Disclosure Recurring	613000000	iso4217:USD	-6
336	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	Liabilities Fair Value Disclosure Recurring	345000000	iso4217:USD	-6
337	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level2 [Member]	Liabilities Fair Value Disclosure Recurring	345000000	iso4217:USD	-6
338	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Financial Instruments Liabilities [Member]	Liabilities Fair Value Disclosure Recurring	345000000	iso4217:USD	-6
339	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	Liabilities Fair Value Disclosure Recurring	0	iso4217:USD	-6
340	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Inputs Level3 [Member]	Liabilities Fair Value Disclosure Recurring	0	iso4217:USD	-6
341	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Derivative Financial Instruments Liabilities [Member]	Liabilities Fair Value Disclosure Recurring	0	iso4217:USD	-6
342	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	Liabilities Fair Value Disclosure Recurring	39000000	iso4217:USD	-6
343	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Inputs Level3 [Member]	Liabilities Fair Value Disclosure Recurring	39000000	iso4217:USD	-6
344	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Financial Instruments Liabilities [Member]	Liabilities Fair Value Disclosure Recurring	39000000	iso4217:USD	-6
345	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	Liabilities Fair Value Disclosure Recurring	630000000	iso4217:USD	-6
346	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Derivative Financial Instruments Liabilities [Member]	Liabilities Fair Value Disclosure Recurring	630000000	iso4217:USD	-6
347	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	Liabilities Fair Value Disclosure Recurring	384000000	iso4217:USD	-6
348	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Financial Instruments Liabilities [Member]	Liabilities Fair Value Disclosure Recurring	384000000	iso4217:USD	-6
349	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Net [Member]	Liabilities Fair Value Disclosure Recurring	232000000	iso4217:USD	-6
350	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Derivative Financial Instruments Liabilities [Member]	Liabilities Fair Value Disclosure Recurring	232000000	iso4217:USD	-6
351	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Net [Member]	Liabilities Fair Value Disclosure Recurring	156000000	iso4217:USD	-6
352	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Financial Instruments Liabilities [Member]	Liabilities Fair Value Disclosure Recurring	156000000	iso4217:USD	-6
353	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Netting [Member]	Liabilities Fair Value Disclosure Recurring	-398000000	iso4217:USD	-6
354	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Derivative Financial Instruments Liabilities [Member]	Liabilities Fair Value Disclosure Recurring	-398000000	iso4217:USD	-6
355	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Netting [Member]	Liabilities Fair Value Disclosure Recurring	-228000000	iso4217:USD	-6
356	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Financial Instruments Liabilities [Member]	Liabilities Fair Value Disclosure Recurring	-228000000	iso4217:USD	-6

Fact Table
Network	100700 - Disclosure - Reconciliation of Total Assets Measured at Fair Value on Recurring Basis to Balance Sheet Presentation (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureReconciliationOfTotalAssetsMeasuredAtFairValueOnRecurringBasisToBalanceSheetPresentationDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Measurements Recurring [Member]	us-gaap:Cash (label)	3501000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Measurements Recurring [Member]	us-gaap:Cash (label)	3624000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Measurements Nonrecurring [Member]	us-gaap:CostMethodInvestments (label)	767000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Measurements Nonrecurring [Member]	us-gaap:CostMethodInvestments (label)	1073000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Assets [Member]	Derivative Assets	246000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Assets [Member]	Derivative Assets	202000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Measurements Nonrecurring [Member]	us-gaap:EquityMethodInvestments (label)	618000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Measurements Nonrecurring [Member]	us-gaap:EquityMethodInvestments (label)	523000000	iso4217:USD	-6

Fact Table
Network	100710 - Disclosure - Components of Inventories (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureComponentsOfInventoriesDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100720 - Disclosure - Components of Property and Equipment (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureComponentsOfPropertyAndEquipmentDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100730 - Disclosure - Property and Equipment - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosurePropertyAndEquipmentAdditionalInformationDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100740 - Disclosure - Business Combinations - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureBusinessCombinationsAdditionalInformationDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-12-07 to 2016-12-08	msft:LinkedInCorporationMember (label)	Business Acquisition Effective Date Of Acquisition1	2016-12-08
2	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	msft:LinkedInCorporationMember (label)	Business Acquisition Name Of Acquired Entity	LinkedIn
3	0000789019 (http://www.sec.gov/CIK)	2016-12-07 to 2016-12-08	msft:LinkedInCorporationMember (label)	Business Combination Consideration Transferred1	27000000000	iso4217:USD	-8
4	0000789019 (http://www.sec.gov/CIK)	2016-12-07 to 2016-12-08	msft:LinkedInCorporationMember (label)	Payments To Acquire Businesses Gross	26900000000	iso4217:USD	-8

Fact Table
Network	100750 - Disclosure - Major Classes of Assets and Liabilities to Which We Allocated the Purchase Price (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureMajorClassesOfAssetsAndLiabilitiesToWhichWeAllocatedPurchasePriceDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-12-08	msft:LinkedInCorporationMember (label)	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Short Term Debt	1323000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2016-12-08	msft:LinkedInCorporationMember (label)	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Other Liabilities Net	131000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-12-08	msft:LinkedInCorporationMember (label)	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Cash And Equivalents	1328000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2016-12-08	msft:LinkedInCorporationMember (label)	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Marketable Securities	2110000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-12-08	msft:LinkedInCorporationMember (label)	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Other	697000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-12-08	msft:LinkedInCorporationMember (label)	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Other	1117000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2016-12-08	msft:LinkedInCorporationMember (label)	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deferred Tax Liabilities Noncurrent	774000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2016-12-08	msft:LinkedInCorporationMember (label)	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles (label)	7887000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-12-08	msft:LinkedInCorporationMember (label)	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles (label)	23000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2016-12-08	msft:LinkedInCorporationMember (label)	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles (label)	3607000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-12-08	msft:LinkedInCorporationMember (label)	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles (label)	2148000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2016-12-08	msft:LinkedInCorporationMember (label)	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles (label)	2109000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2016-12-08	msft:LinkedInCorporationMember (label)	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment	1529000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2016-12-08	msft:LinkedInCorporationMember (label)	Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Net	27009000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2016-12-08	msft:LinkedInCorporationMember (label)	us-gaap:Goodwill (label)	16803000000	iso4217:USD	-6

Fact Table
Network	100760 - Disclosure - Major Classes of Assets and Liabilities to Which We Allocated the Purchase Price (Parenthetical) (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureMajorClassesOfAssetsAndLiabilitiesToWhichWeAllocatedPurchasePriceParentheticalDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations
1	0000789019 (http://www.sec.gov/CIK)	2016-12-08	msft:LinkedInCorporationMember (label)	Business Acquisition Purchase Price Allocation Goodwill Expected Tax Deductible Amount	0		iso4217:USD	INF
2	0000789019 (http://www.sec.gov/CIK)	2017-06-30	msft:LinkedInCorporationMember (label)	us-gaap:DebtInstrumentFaceAmount (label)	18000000		iso4217:USD	-6

Fact Table
Network	100770 - Disclosure - Acquired Intangible Assets (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureAcquiredIntangibleAssetsDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Finite Lived Intangible Assets Major Class Name [Domain]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1687034
2	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Finite Lived Intangible Assets Major Class Name [Domain]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1687624
3	0000789019 (http://www.sec.gov/CIK)	2016-12-07 to 2016-12-08	msft:LinkedInCorporationMember (label)	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1688228
4	0000789019 (http://www.sec.gov/CIK)	2016-12-07 to 2016-12-08	msft:LinkedInCorporationMember (label)	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1688832
5	0000789019 (http://www.sec.gov/CIK)	2016-12-07 to 2016-12-08	Contractual Rights [Member]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1689422
6	0000789019 (http://www.sec.gov/CIK)	2016-12-07 to 2016-12-08	msft:LinkedInCorporationMember (label)	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1690026
7	0000789019 (http://www.sec.gov/CIK)	2016-12-07 to 2016-12-08	Customer Relationships [Member]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1690616
8	0000789019 (http://www.sec.gov/CIK)	2016-12-07 to 2016-12-08	msft:LinkedInCorporationMember (label)	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1691220
9	0000789019 (http://www.sec.gov/CIK)	2016-12-07 to 2016-12-08	us-gaap:MarketingRelatedIntangibleAssetsMember (label)	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1691828
10	0000789019 (http://www.sec.gov/CIK)	2016-12-07 to 2016-12-08	msft:LinkedInCorporationMember (label)	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1692432
11	0000789019 (http://www.sec.gov/CIK)	2016-12-07 to 2016-12-08	Technology Based Intangible Assets [Member]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1693022
12	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Contractual Rights [Member]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1693612
13	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Customer Relationships [Member]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1694202
14	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Customer Relationships [Member]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1694792
15	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	us-gaap:MarketingRelatedIntangibleAssetsMember (label)	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1695400
16	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:MarketingRelatedIntangibleAssetsMember (label)	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1696008
17	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Technology Based Intangible Assets [Member]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1696598
18	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Technology Based Intangible Assets [Member]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1697188
19	0000789019 (http://www.sec.gov/CIK)	2016-12-08	msft:LinkedInCorporationMember (label)	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles (label)	7887000000	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2016-12-08	msft:LinkedInCorporationMember (label)	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles (label)	23000000	iso4217:USD	-6
21	0000789019 (http://www.sec.gov/CIK)	2016-12-08	Contractual Rights [Member]	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles (label)	23000000	iso4217:USD	-6
22	0000789019 (http://www.sec.gov/CIK)	2016-12-08	msft:LinkedInCorporationMember (label)	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles (label)	3607000000	iso4217:USD	-6
23	0000789019 (http://www.sec.gov/CIK)	2016-12-08	Customer Relationships [Member]	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles (label)	3607000000	iso4217:USD	-6
24	0000789019 (http://www.sec.gov/CIK)	2016-12-08	msft:LinkedInCorporationMember (label)	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles (label)	2148000000	iso4217:USD	-6
25	0000789019 (http://www.sec.gov/CIK)	2016-12-08	us-gaap:MarketingRelatedIntangibleAssetsMember (label)	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles (label)	2148000000	iso4217:USD	-6
26	0000789019 (http://www.sec.gov/CIK)	2016-12-08	msft:LinkedInCorporationMember (label)	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles (label)	2109000000	iso4217:USD	-6
27	0000789019 (http://www.sec.gov/CIK)	2016-12-08	Technology Based Intangible Assets [Member]	us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles (label)	2109000000	iso4217:USD	-6

Fact Table
Network	100780 - Disclosure - Revenue and Operating Loss Attributable to Acquiree, Since the Date of Acquisition (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureRevenueAndOperatingLossAttributableToAcquireeSinceDateOfAcquisitionDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations
1	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	msft:LinkedInCorporationMember (label)	Business Combination Pro Forma Information Earnings Or Loss Of Acquiree Since Acquisition Date Actual	-948000000		iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	msft:LinkedInCorporationMember (label)	Business Combination Pro Forma Information Revenue Of Acquiree Since Acquisition Date Actual	2268000000		iso4217:USD	-6

Fact Table
Network	100790 - Disclosure - Supplemental Consolidated Financial Results on Unaudited Pro Forma Basis, as If the Acquisition Had Been Consummated on Beginning of Period (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureSupplementalConsolidatedFinancialResultsOnUnauditedProFormaBasisAsIfAcquisitionHadBeenConsummatedOnBeginningOfPeriodDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	msft:LinkedInCorporationMember (label)	Business Acquisition Pro Forma Earnings Per Share Diluted	1.92	iso4217:USD/shares	2
2	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	msft:LinkedInCorporationMember (label)	Business Acquisition Pro Forma Earnings Per Share Diluted	2.67	iso4217:USD/shares	2
3	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	msft:LinkedInCorporationMember (label)	Business Acquisitions Pro Forma Net Income Loss	15383000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	msft:LinkedInCorporationMember (label)	Business Acquisitions Pro Forma Net Income Loss	20894000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	msft:LinkedInCorporationMember (label)	Business Acquisitions Pro Forma Revenue	88652000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	msft:LinkedInCorporationMember (label)	Business Acquisitions Pro Forma Revenue	91668000000	iso4217:USD	-6

Fact Table
Network	100800 - Disclosure - Carrying Amount of Goodwill (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureCarryingAmountOfGoodwillDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Segment [Domain]	us-gaap:Goodwill (label)	16939000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Segment [Domain]	us-gaap:Goodwill (label)	17872000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Segment [Domain]	us-gaap:Goodwill (label)	35122000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Intelligent Cloud [Member]	us-gaap:Goodwill (label)	4917000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Intelligent Cloud [Member]	us-gaap:Goodwill (label)	5467000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Intelligent Cloud [Member]	us-gaap:Goodwill (label)	5555000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2015-06-30	More Personal Computing [Member]	us-gaap:Goodwill (label)	5713000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2016-06-30	More Personal Computing [Member]	us-gaap:Goodwill (label)	5727000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2017-06-30	More Personal Computing [Member]	us-gaap:Goodwill (label)	5828000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Productivity And Business Processes [Member]	us-gaap:Goodwill (label)	6309000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Productivity And Business Processes [Member]	us-gaap:Goodwill (label)	6678000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Productivity And Business Processes [Member]	us-gaap:Goodwill (label)	23739000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Segment [Domain]	Goodwill Acquired During Period	1092000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Segment [Domain]	Goodwill Acquired During Period	17236000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Intelligent Cloud [Member]	Goodwill Acquired During Period	549000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Intelligent Cloud [Member]	Goodwill Acquired During Period	49000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	More Personal Computing [Member]	Goodwill Acquired During Period	100000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	More Personal Computing [Member]	Goodwill Acquired During Period	115000000	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Productivity And Business Processes [Member]	Goodwill Acquired During Period	443000000	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Productivity And Business Processes [Member]	Goodwill Acquired During Period	17072000000	iso4217:USD	-6
21	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Segment [Domain]	Goodwill Other Increase Decrease	-159000000	iso4217:USD	-6
22	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Segment [Domain]	Goodwill Other Increase Decrease	14000000	iso4217:USD	-6
23	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Intelligent Cloud [Member]	Goodwill Other Increase Decrease	1000000	iso4217:USD	-6
24	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Intelligent Cloud [Member]	Goodwill Other Increase Decrease	39000000	iso4217:USD	-6
25	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	More Personal Computing [Member]	Goodwill Other Increase Decrease	-86000000	iso4217:USD	-6
26	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	More Personal Computing [Member]	Goodwill Other Increase Decrease	-14000000	iso4217:USD	-6
27	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Productivity And Business Processes [Member]	Goodwill Other Increase Decrease	-74000000	iso4217:USD	-6
28	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Productivity And Business Processes [Member]	Goodwill Other Increase Decrease	-11000000	iso4217:USD	-6

Fact Table
Network	100810 - Disclosure - Goodwill - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureGoodwillAdditionalInformationDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations
1	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Phone Hardware [Member]	Goodwill Impairment Loss	5100000000		iso4217:USD	-8

Fact Table
Network	100820 - Disclosure - Finite-Lived Intangible Assets (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureFiniteLivedIntangibleAssetsDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Contractual Rights [Member]	Finite Lived Intangible Assets Accumulated Amortization	718000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Contractual Rights [Member]	Finite Lived Intangible Assets Accumulated Amortization	722000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Customer Relationships [Member]	Finite Lived Intangible Assets Accumulated Amortization	385000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Customer Relationships [Member]	Finite Lived Intangible Assets Accumulated Amortization	692000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:MarketingRelatedIntangibleAssetsMember (label)	Finite Lived Intangible Assets Accumulated Amortization	616000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:MarketingRelatedIntangibleAssetsMember (label)	Finite Lived Intangible Assets Accumulated Amortization	829000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Technology Based Intangible Assets [Member]	Finite Lived Intangible Assets Accumulated Amortization	3648000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Technology Based Intangible Assets [Member]	Finite Lived Intangible Assets Accumulated Amortization	4318000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Contractual Rights [Member]	Finite Lived Intangible Assets Gross	796000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Contractual Rights [Member]	Finite Lived Intangible Assets Gross	841000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Customer Relationships [Member]	Finite Lived Intangible Assets Gross	465000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Customer Relationships [Member]	Finite Lived Intangible Assets Gross	4045000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:MarketingRelatedIntangibleAssetsMember (label)	Finite Lived Intangible Assets Gross	1869000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:MarketingRelatedIntangibleAssetsMember (label)	Finite Lived Intangible Assets Gross	4016000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Technology Based Intangible Assets [Member]	Finite Lived Intangible Assets Gross	5970000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Technology Based Intangible Assets [Member]	Finite Lived Intangible Assets Gross	7765000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Contractual Rights [Member]	us-gaap:FiniteLivedIntangibleAssetsNet (label)	78000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Contractual Rights [Member]	us-gaap:FiniteLivedIntangibleAssetsNet (label)	119000000	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Customer Relationships [Member]	us-gaap:FiniteLivedIntangibleAssetsNet (label)	80000000	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Customer Relationships [Member]	us-gaap:FiniteLivedIntangibleAssetsNet (label)	3353000000	iso4217:USD	-6
21	0000789019 (http://www.sec.gov/CIK)	2016-06-30	us-gaap:MarketingRelatedIntangibleAssetsMember (label)	us-gaap:FiniteLivedIntangibleAssetsNet (label)	1253000000	iso4217:USD	-6
22	0000789019 (http://www.sec.gov/CIK)	2017-06-30	us-gaap:MarketingRelatedIntangibleAssetsMember (label)	us-gaap:FiniteLivedIntangibleAssetsNet (label)	3187000000	iso4217:USD	-6
23	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Technology Based Intangible Assets [Member]	us-gaap:FiniteLivedIntangibleAssetsNet (label)	2322000000	iso4217:USD	-6
24	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Technology Based Intangible Assets [Member]	us-gaap:FiniteLivedIntangibleAssetsNet (label)	3447000000	iso4217:USD	-6

Fact Table
Network	100830 - Disclosure - Finite-Lived Intangible Assets (Parenthetical) (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureFiniteLivedIntangibleAssetsParentheticalDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations
1	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Technology Based Intangible Assets [Member]	Capitalized Software Development Costs For Software Sold To Customers	115000000		iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Technology Based Intangible Assets [Member]	Capitalized Software Development Costs For Software Sold To Customers	59000000		iso4217:USD	-6

Fact Table
Network	100840 - Disclosure - Intangible Assets - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureIntangibleAssetsAdditionalInformationDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations
1	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Devices [Member]	Impairment Of Intangible Assets Finitelived	480000000		iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Phone Hardware [Member]	Impairment Of Intangible Assets Finitelived	2200000000		iso4217:USD	-8

Fact Table
Network	100850 - Disclosure - Intangible Assets Acquired (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureIntangibleAssetsAcquiredDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Contractual Rights [Member]	Acquired Finite Lived Intangible Assets	0	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Contractual Rights [Member]	Acquired Finite Lived Intangible Assets	63000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Customer Relationships [Member]	Acquired Finite Lived Intangible Assets	30000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Customer Relationships [Member]	Acquired Finite Lived Intangible Assets	3607000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	us-gaap:MarketingRelatedIntangibleAssetsMember (label)	Acquired Finite Lived Intangible Assets	2000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:MarketingRelatedIntangibleAssetsMember (label)	Acquired Finite Lived Intangible Assets	2148000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Technology Based Intangible Assets [Member]	Acquired Finite Lived Intangible Assets	361000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Technology Based Intangible Assets [Member]	Acquired Finite Lived Intangible Assets	2265000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-12-07 to 2016-12-08	Contractual Rights [Member]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1634748
10	0000789019 (http://www.sec.gov/CIK)	2016-12-07 to 2016-12-08	Customer Relationships [Member]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1635338
11	0000789019 (http://www.sec.gov/CIK)	2016-12-07 to 2016-12-08	us-gaap:MarketingRelatedIntangibleAssetsMember (label)	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1635946
12	0000789019 (http://www.sec.gov/CIK)	2016-12-07 to 2016-12-08	Technology Based Intangible Assets [Member]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1636536
13	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Contractual Rights [Member]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1637126
14	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Customer Relationships [Member]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1637716
15	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Customer Relationships [Member]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1638306
16	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	us-gaap:MarketingRelatedIntangibleAssetsMember (label)	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1638914
17	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:MarketingRelatedIntangibleAssetsMember (label)	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1639522
18	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Technology Based Intangible Assets [Member]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1640112
19	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Technology Based Intangible Assets [Member]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1640702

Fact Table
Network	100860 - Disclosure - Estimated Future Amortization Expense Related to Intangible Assets (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureEstimatedFutureAmortizationExpenseRelatedToIntangibleAssetsDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100870 - Disclosure - Debt - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureDebtAdditionalInformationDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Debt Instrument Name [Domain]	Commercial Paper	12900000000	iso4217:USD	-8
2	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Debt Type [Domain]	Commercial Paper	12900000000	iso4217:USD	-8
3	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Debt Instrument Name [Domain]	Commercial Paper	9100000000	iso4217:USD	-8
4	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Debt Type [Domain]	Commercial Paper	9100000000	iso4217:USD	-8
5	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	us-gaap:MaximumMember (label)	Debt Instrument Term	_1606098
6	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Commercial Paper [Member]	Debt Instrument Term	_1606688
7	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:MaximumMember (label)	Debt Instrument Term	_1607290
8	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Commercial Paper [Member]	Debt Instrument Term	_1607880
9	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	us-gaap:MinimumMember (label)	Debt Instrument Term	_1608482
10	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Commercial Paper [Member]	Debt Instrument Term	_1609072
11	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:MinimumMember (label)	Debt Instrument Term	_1609674
12	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Commercial Paper [Member]	Debt Instrument Term	_1610264
13	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Debt Instrument Name [Domain]	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net	392000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Debt Type [Domain]	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net	392000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Debt Instrument Name [Domain]	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net	715000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Debt Type [Domain]	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net	715000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Debt Instrument Name [Domain]	Interest Paid	620000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Short Term Debt Type [Domain]	Interest Paid	620000000	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Debt Instrument Name [Domain]	Interest Paid	1100000000	iso4217:USD	-8
20	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Short Term Debt Type [Domain]	Interest Paid	1100000000	iso4217:USD	-8
21	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Debt Instrument Name [Domain]	Interest Paid	1600000000	iso4217:USD	-8
22	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Short Term Debt Type [Domain]	Interest Paid	1600000000	iso4217:USD	-8
23	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Debt Instrument Name [Domain]	Line Of Credit Facility Covenant Compliance	As of June 30, 2017, we were in compliance with the only financial covenant in both credit agreements, which requires us to maintain a coverage ratio of at least three times earnings before interest, taxes, depreciation, and amortization to interest expense, as defined in the credit agreements.
24	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Short Term Debt Type [Domain]	Line Of Credit Facility Covenant Compliance	As of June 30, 2017, we were in compliance with the only financial covenant in both credit agreements, which requires us to maintain a coverage ratio of at least three times earnings before interest, taxes, depreciation, and amortization to interest expense, as defined in the credit agreements.
25	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Credit Facility Expire On November Fourteen Twenty Eighteen [Member]	Line Of Credit Facility Expiration Date1	2018-11-14
26	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Credit Facility Expire On October Thirty One Twenty Seventeen [Member]	Line Of Credit Facility Expiration Date1	2017-10-31
27	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Credit Facility Expire On November Fourteen Twenty Eighteen [Member]	Line Of Credit Facility Maximum Borrowing Capacity	5000000000	iso4217:USD	INF
28	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Credit Facility Expire On October Thirty One Twenty Seventeen [Member]	Line Of Credit Facility Maximum Borrowing Capacity	5000000000	iso4217:USD	INF
29	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Debt Instrument Name [Domain]	Long Term Debt	40600000000	iso4217:USD	-8
30	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Debt Type [Domain]	Long Term Debt	40600000000	iso4217:USD	-8
31	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Debt Instrument Name [Domain]	Long Term Debt	77100000000	iso4217:USD	-8
32	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Debt Type [Domain]	Long Term Debt	77100000000	iso4217:USD	-8
33	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Debt Instrument Name [Domain]	Long Term Debt Fair Value	44000000000	iso4217:USD	-8
34	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Debt Type [Domain]	Long Term Debt Fair Value	44000000000	iso4217:USD	-8
35	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Debt Instrument Name [Domain]	Long Term Debt Fair Value	80300000000	iso4217:USD	-8
36	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Debt Type [Domain]	Long Term Debt Fair Value	80300000000	iso4217:USD	-8
37	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Debt Instrument Name [Domain]	Proceeds From Lines Of Credit	0	iso4217:USD	INF
38	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Short Term Debt Type [Domain]	Proceeds From Lines Of Credit	0	iso4217:USD	INF
39	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Debt Instrument Name [Domain]	Proceeds From Lines Of Credit	0	iso4217:USD	INF
40	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Short Term Debt Type [Domain]	Proceeds From Lines Of Credit	0	iso4217:USD	INF
41	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	Short Term Debt Weighted Average Interest Rate	0.0043	pure	4
42	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commercial Paper [Member]	Short Term Debt Weighted Average Interest Rate	0.0101	pure	4

Fact Table
Network	100880 - Disclosure - Long-term Debt (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureLongTermDebtDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Five Point Three Percent Due February Eight Twenty Forty One [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1000000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Five Point Three Percent Due February Eight Twenty Forty One [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1000000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Five Point Two Percent Due June One Twenty Thirty Nine [Member]	us-gaap:DebtInstrumentFaceAmount (label)	750000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Five Point Two Percent Due June One Twenty Thirty Nine [Member]	us-gaap:DebtInstrumentFaceAmount (label)	750000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Percent Due February Twelve Twenty Fifty Five [Member]	us-gaap:DebtInstrumentFaceAmount (label)	2250000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Percent Due February Twelve Twenty Fifty Five [Member]	us-gaap:DebtInstrumentFaceAmount (label)	2250000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Point Eight Seven Five Percent Due December Fifteen Twenty Forty Three [Member]	us-gaap:DebtInstrumentFaceAmount (label)	500000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Eight Seven Five Percent Due December Fifteen Twenty Forty Three [Member]	us-gaap:DebtInstrumentFaceAmount (label)	500000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Five Percent Due February Six Twenty Fifty Seven [Member]	us-gaap:DebtInstrumentFaceAmount (label)	2000000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Point Five Percent Due October One Twenty Forty [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1000000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Five Percent Due October One Twenty Forty [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1000000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Point Four Five Percent Due November Three Twenty Forty Five [Member]	us-gaap:DebtInstrumentFaceAmount (label)	3000000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Four Five Percent Due November Three Twenty Forty Five [Member]	us-gaap:DebtInstrumentFaceAmount (label)	3000000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point One Percent Due February Six Twenty Thirty Seven [Member]	us-gaap:DebtInstrumentFaceAmount (label)	2500000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Point Seven Five Percent Due November Three Twenty Fifty Five [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1000000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Seven Five Percent Due November Three Twenty Fifty Five [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1000000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Two Five Percent Due February Six Twenty Forty Seven [Member]	us-gaap:DebtInstrumentFaceAmount (label)	3000000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Point Two Percent Due June One Twenty Nineteen [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1000000000	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Two Percent Due June One Twenty Nineteen [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1000000000	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Point Two Percent Due November Three Twenty Thirty Five [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1000000000	iso4217:USD	-6
21	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Two Percent Due November Three Twenty Thirty Five [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1000000000	iso4217:USD	-6
22	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Point Zero Percent Due February Eight Twenty Twenty One [Member]	us-gaap:DebtInstrumentFaceAmount (label)	500000000	iso4217:USD	-6
23	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Zero Percent Due February Eight Twenty Twenty One [Member]	us-gaap:DebtInstrumentFaceAmount (label)	500000000	iso4217:USD	-6
24	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes One Point Eight Five Percent Due February Six Twenty Twenty [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1500000000	iso4217:USD	-6
25	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes One Point Eight Five Percent Due February Twelve Twenty Twenty [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1500000000	iso4217:USD	-6
26	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes One Point Eight Five Percent Due February Twelve Twenty Twenty [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1500000000	iso4217:USD	-6
27	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes One Point Five Five Percent Due August Eight Twenty Twenty One [Member]	us-gaap:DebtInstrumentFaceAmount (label)	2750000000	iso4217:USD	-6
28	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes One Point One Percent Due August Eight Twenty Nineteen [Member]	us-gaap:DebtInstrumentFaceAmount (label)	2500000000	iso4217:USD	-6
29	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes One Point Six Two Five Percent Due December Six Twenty Eighteen [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1250000000	iso4217:USD	-6
30	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes One Point Six Two Five Percent Due December Six Twenty Eighteen [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1250000000	iso4217:USD	-6
31	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes One Point Three Zero Percent Due November Three Twenty Eighteen [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1750000000	iso4217:USD	-6
32	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes One Point Three Zero Percent Due November Three Twenty Eighteen [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1750000000	iso4217:USD	-6
33	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes One Point Zero Percent Due May One Twenty Eighteen [Member]	us-gaap:DebtInstrumentFaceAmount (label)	450000000	iso4217:USD	-6
34	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes One Point Zero Percent Due May One Twenty Eighteen [Member]	us-gaap:DebtInstrumentFaceAmount (label)	450000000	iso4217:USD	-6
35	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Three Point Five Percent Due February Twelve Twenty Thirty Five [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1500000000	iso4217:USD	-6
36	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Five Percent Due February Twelve Twenty Thirty Five [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1500000000	iso4217:USD	-6
37	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Three Point Five Percent Due November Fifteen Twenty Forty Two [Member]	us-gaap:DebtInstrumentFaceAmount (label)	900000000	iso4217:USD	-6
38	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Five Percent Due November Fifteen Twenty Forty Two [Member]	us-gaap:DebtInstrumentFaceAmount (label)	900000000	iso4217:USD	-6
39	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Four Five Percent Due August Eight Twenty Thirty Six [Member]	us-gaap:DebtInstrumentFaceAmount (label)	2250000000	iso4217:USD	-6
40	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Nine Five Percent Due August Eight Twenty Fifty Six [Member]	us-gaap:DebtInstrumentFaceAmount (label)	2250000000	iso4217:USD	-6
41	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Three Point One Two Five Percent Due December Six Twenty Twenty Eight [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1944000000	iso4217:USD	-6
42	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point One Two Five Percent Due December Six Twenty Twenty Eight [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1996000000	iso4217:USD	-6
43	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Three Point One Two Five Percent Due November Three Twenty Twenty Five [Member]	us-gaap:DebtInstrumentFaceAmount (label)	3000000000	iso4217:USD	-6
44	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point One Two Five Percent Due November Three Twenty Twenty Five [Member]	us-gaap:DebtInstrumentFaceAmount (label)	3000000000	iso4217:USD	-6
45	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Three Point Seven Five Percent Due February Twelve Twenty Forty Five [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1750000000	iso4217:USD	-6
46	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Seven Five Percent Due February Twelve Twenty Forty Five [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1750000000	iso4217:USD	-6
47	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Three Point Seven Five Percent Due May One Twenty Forty Three [Member]	us-gaap:DebtInstrumentFaceAmount (label)	500000000	iso4217:USD	-6
48	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Seven Five Percent Due May One Twenty Forty Three [Member]	us-gaap:DebtInstrumentFaceAmount (label)	500000000	iso4217:USD	-6
49	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Seven Percent Due August Eight Twenty Forty Six [Member]	us-gaap:DebtInstrumentFaceAmount (label)	4500000000	iso4217:USD	-6
50	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Three Point Six Two Five Percent Due December Fifteen Twenty Twenty Three [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1500000000	iso4217:USD	-6
51	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Six Two Five Percent Due December Fifteen Twenty Twenty Three [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1500000000	iso4217:USD	-6
52	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Three Percent Due February Six Twenty Twenty Seven [Member]	us-gaap:DebtInstrumentFaceAmount (label)	4000000000	iso4217:USD	-6
53	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Three Point Zero Percent Due October One Twenty Twenty [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1000000000	iso4217:USD	-6
54	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Zero Percent Due October One Twenty Twenty [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1000000000	iso4217:USD	-6
55	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Eight Seven Five Percent Due February Six Twenty Twenty Four [Member]	us-gaap:DebtInstrumentFaceAmount (label)	2250000000	iso4217:USD	-6
56	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Four Percent Due August Eight Twenty Twenty Six [Member]	us-gaap:DebtInstrumentFaceAmount (label)	4000000000	iso4217:USD	-6
57	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Four Percent Due February Six Twenty Twenty Two [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1750000000	iso4217:USD	-6
58	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Two Point One Two Five Percent Due December Six Twenty Twenty One [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1944000000	iso4217:USD	-6
59	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point One Two Five Percent Due December Six Twenty Twenty One [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1996000000	iso4217:USD	-6
60	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Two Point One Two Five Percent Due November Fifteen Twenty Twenty Two [Member]	us-gaap:DebtInstrumentFaceAmount (label)	750000000	iso4217:USD	-6
61	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point One Two Five Percent Due November Fifteen Twenty Twenty Two [Member]	us-gaap:DebtInstrumentFaceAmount (label)	750000000	iso4217:USD	-6
62	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Two Point Seven Percent Due February Twelve Twenty Twenty Five [Member]	us-gaap:DebtInstrumentFaceAmount (label)	2250000000	iso4217:USD	-6
63	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Seven Percent Due February Twelve Twenty Twenty Five [Member]	us-gaap:DebtInstrumentFaceAmount (label)	2250000000	iso4217:USD	-6
64	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Two Point Six Five Percent Due November Three Twenty Twenty Two [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1000000000	iso4217:USD	-6
65	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Six Five Percent Due November Three Twenty Twenty Two [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1000000000	iso4217:USD	-6
66	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Two Point Six Two Five Percent Due May Two Twenty Thirty Three [Member]	us-gaap:DebtInstrumentFaceAmount (label)	611000000	iso4217:USD	-6
67	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Six Two Five Percent Due May Two Twenty Thirty Three [Member]	us-gaap:DebtInstrumentFaceAmount (label)	627000000	iso4217:USD	-6
68	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Two Point Three Seven Five Percent Due February Twelve Twenty Twenty Two [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1500000000	iso4217:USD	-6
69	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Three Seven Five Percent Due February Twelve Twenty Twenty Two [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1500000000	iso4217:USD	-6
70	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Two Point Three Seven Five Percent Due May One Twenty Twenty Three [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1000000000	iso4217:USD	-6
71	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Three Seven Five Percent Due May One Twenty Twenty Three [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1000000000	iso4217:USD	-6
72	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Zero Percent Due August Eight Twenty Twenty Three [Member]	us-gaap:DebtInstrumentFaceAmount (label)	1500000000	iso4217:USD	-6
73	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Two Point Zero Percent Due November Three Twenty Twenty [Member]	us-gaap:DebtInstrumentFaceAmount (label)	2250000000	iso4217:USD	-6
74	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Zero Percent Due November Three Twenty Twenty [Member]	us-gaap:DebtInstrumentFaceAmount (label)	2250000000	iso4217:USD	-6
75	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Zero Point Eight Seven Five Percent Due November Fifteen Twenty Seventeen [Member]	us-gaap:DebtInstrumentFaceAmount (label)	600000000	iso4217:USD	-6
76	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Zero Point Eight Seven Five Percent Due November Fifteen Twenty Seventeen [Member]	us-gaap:DebtInstrumentFaceAmount (label)	600000000	iso4217:USD	-6
77	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Zero Point Five Percent Due November One Twenty Nineteen [Member]	us-gaap:DebtInstrumentFaceAmount (label)	18000000	iso4217:USD	-6
78	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Five Point Three Percent Due February Eight Twenty Forty One [Member]	Debt Instrument Interest Rate Effective Percentage	0.05361	pure	5
79	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Five Point Three Percent Due February Eight Twenty Forty One [Member]	Debt Instrument Interest Rate Effective Percentage	0.05361	pure	5
80	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Five Point Two Percent Due June One Twenty Thirty Nine [Member]	Debt Instrument Interest Rate Effective Percentage	0.0524	pure	5
81	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Five Point Two Percent Due June One Twenty Thirty Nine [Member]	Debt Instrument Interest Rate Effective Percentage	0.0524	pure	5
82	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Percent Due February Twelve Twenty Fifty Five [Member]	Debt Instrument Interest Rate Effective Percentage	0.04063	pure	5
83	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Percent Due February Twelve Twenty Fifty Five [Member]	Debt Instrument Interest Rate Effective Percentage	0.04063	pure	5
84	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Point Eight Seven Five Percent Due December Fifteen Twenty Forty Three [Member]	Debt Instrument Interest Rate Effective Percentage	0.04918	pure	5
85	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Eight Seven Five Percent Due December Fifteen Twenty Forty Three [Member]	Debt Instrument Interest Rate Effective Percentage	0.04918	pure	5
86	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Five Percent Due February Six Twenty Fifty Seven [Member]	Debt Instrument Interest Rate Effective Percentage	0.04528	pure	5
87	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Point Five Percent Due October One Twenty Forty [Member]	Debt Instrument Interest Rate Effective Percentage	0.04567	pure	5
88	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Five Percent Due October One Twenty Forty [Member]	Debt Instrument Interest Rate Effective Percentage	0.04567	pure	5
89	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Point Four Five Percent Due November Three Twenty Forty Five [Member]	Debt Instrument Interest Rate Effective Percentage	0.04492	pure	5
90	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Four Five Percent Due November Three Twenty Forty Five [Member]	Debt Instrument Interest Rate Effective Percentage	0.04492	pure	5
91	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point One Percent Due February Six Twenty Thirty Seven [Member]	Debt Instrument Interest Rate Effective Percentage	0.04152	pure	5
92	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Point Seven Five Percent Due November Three Twenty Fifty Five [Member]	Debt Instrument Interest Rate Effective Percentage	0.04782	pure	5
93	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Seven Five Percent Due November Three Twenty Fifty Five [Member]	Debt Instrument Interest Rate Effective Percentage	0.04782	pure	5
94	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Two Five Percent Due February Six Twenty Forty Seven [Member]	Debt Instrument Interest Rate Effective Percentage	0.04287	pure	5
95	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Point Two Percent Due June One Twenty Nineteen [Member]	Debt Instrument Interest Rate Effective Percentage	0.04379	pure	5
96	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Two Percent Due June One Twenty Nineteen [Member]	Debt Instrument Interest Rate Effective Percentage	0.04379	pure	5
97	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Point Two Percent Due November Three Twenty Thirty Five [Member]	Debt Instrument Interest Rate Effective Percentage	0.0426	pure	5
98	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Two Percent Due November Three Twenty Thirty Five [Member]	Debt Instrument Interest Rate Effective Percentage	0.0426	pure	5
99	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Point Zero Percent Due February Eight Twenty Twenty One [Member]	Debt Instrument Interest Rate Effective Percentage	0.04082	pure	5
100	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Zero Percent Due February Eight Twenty Twenty One [Member]	Debt Instrument Interest Rate Effective Percentage	0.04082	pure	5
101	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes One Point Eight Five Percent Due February Six Twenty Twenty [Member]	Debt Instrument Interest Rate Effective Percentage	0.01952	pure	5
102	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes One Point Eight Five Percent Due February Twelve Twenty Twenty [Member]	Debt Instrument Interest Rate Effective Percentage	0.01935	pure	5
103	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes One Point Eight Five Percent Due February Twelve Twenty Twenty [Member]	Debt Instrument Interest Rate Effective Percentage	0.01935	pure	5
104	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes One Point Five Five Percent Due August Eight Twenty Twenty One [Member]	Debt Instrument Interest Rate Effective Percentage	0.01642	pure	5
105	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes One Point One Percent Due August Eight Twenty Nineteen [Member]	Debt Instrument Interest Rate Effective Percentage	0.01203	pure	5
106	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes One Point Six Two Five Percent Due December Six Twenty Eighteen [Member]	Debt Instrument Interest Rate Effective Percentage	0.01824	pure	5
107	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes One Point Six Two Five Percent Due December Six Twenty Eighteen [Member]	Debt Instrument Interest Rate Effective Percentage	0.01824	pure	5
108	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes One Point Three Zero Percent Due November Three Twenty Eighteen [Member]	Debt Instrument Interest Rate Effective Percentage	0.01396	pure	5
109	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes One Point Three Zero Percent Due November Three Twenty Eighteen [Member]	Debt Instrument Interest Rate Effective Percentage	0.01396	pure	5
110	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes One Point Zero Percent Due May One Twenty Eighteen [Member]	Debt Instrument Interest Rate Effective Percentage	0.01106	pure	5
111	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes One Point Zero Percent Due May One Twenty Eighteen [Member]	Debt Instrument Interest Rate Effective Percentage	0.01106	pure	5
112	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Three Point Five Percent Due February Twelve Twenty Thirty Five [Member]	Debt Instrument Interest Rate Effective Percentage	0.03604	pure	5
113	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Five Percent Due February Twelve Twenty Thirty Five [Member]	Debt Instrument Interest Rate Effective Percentage	0.03604	pure	5
114	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Three Point Five Percent Due November Fifteen Twenty Forty Two [Member]	Debt Instrument Interest Rate Effective Percentage	0.03571	pure	5
115	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Five Percent Due November Fifteen Twenty Forty Two [Member]	Debt Instrument Interest Rate Effective Percentage	0.03571	pure	5
116	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Four Five Percent Due August Eight Twenty Thirty Six [Member]	Debt Instrument Interest Rate Effective Percentage	0.0351	pure	5
117	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Nine Five Percent Due August Eight Twenty Fifty Six [Member]	Debt Instrument Interest Rate Effective Percentage	0.04033	pure	5
118	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Three Point One Two Five Percent Due December Six Twenty Twenty Eight [Member]	Debt Instrument Interest Rate Effective Percentage	0.03218	pure	5
119	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point One Two Five Percent Due December Six Twenty Twenty Eight [Member]	Debt Instrument Interest Rate Effective Percentage	0.03218	pure	5
120	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Three Point One Two Five Percent Due November Three Twenty Twenty Five [Member]	Debt Instrument Interest Rate Effective Percentage	0.03176	pure	5
121	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point One Two Five Percent Due November Three Twenty Twenty Five [Member]	Debt Instrument Interest Rate Effective Percentage	0.03176	pure	5
122	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Three Point Seven Five Percent Due February Twelve Twenty Forty Five [Member]	Debt Instrument Interest Rate Effective Percentage	0.038	pure	5
123	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Seven Five Percent Due February Twelve Twenty Forty Five [Member]	Debt Instrument Interest Rate Effective Percentage	0.038	pure	5
124	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Three Point Seven Five Percent Due May One Twenty Forty Three [Member]	Debt Instrument Interest Rate Effective Percentage	0.03829	pure	5
125	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Seven Five Percent Due May One Twenty Forty Three [Member]	Debt Instrument Interest Rate Effective Percentage	0.03829	pure	5
126	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Seven Percent Due August Eight Twenty Forty Six [Member]	Debt Instrument Interest Rate Effective Percentage	0.03743	pure	5
127	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Three Point Six Two Five Percent Due December Fifteen Twenty Twenty Three [Member]	Debt Instrument Interest Rate Effective Percentage	0.03726	pure	5
128	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Six Two Five Percent Due December Fifteen Twenty Twenty Three [Member]	Debt Instrument Interest Rate Effective Percentage	0.03726	pure	5
129	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Three Percent Due February Six Twenty Twenty Seven [Member]	Debt Instrument Interest Rate Effective Percentage	0.03383	pure	5
130	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Three Point Zero Percent Due October One Twenty Twenty [Member]	Debt Instrument Interest Rate Effective Percentage	0.03137	pure	5
131	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Zero Percent Due October One Twenty Twenty [Member]	Debt Instrument Interest Rate Effective Percentage	0.03137	pure	5
132	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Eight Seven Five Percent Due February Six Twenty Twenty Four [Member]	Debt Instrument Interest Rate Effective Percentage	0.03041	pure	5
133	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Four Percent Due August Eight Twenty Twenty Six [Member]	Debt Instrument Interest Rate Effective Percentage	0.02464	pure	5
134	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Four Percent Due February Six Twenty Twenty Two [Member]	Debt Instrument Interest Rate Effective Percentage	0.0252	pure	5
135	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Two Point One Two Five Percent Due December Six Twenty Twenty One [Member]	Debt Instrument Interest Rate Effective Percentage	0.02233	pure	5
136	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point One Two Five Percent Due December Six Twenty Twenty One [Member]	Debt Instrument Interest Rate Effective Percentage	0.02233	pure	5
137	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Two Point One Two Five Percent Due November Fifteen Twenty Twenty Two [Member]	Debt Instrument Interest Rate Effective Percentage	0.02239	pure	5
138	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point One Two Five Percent Due November Fifteen Twenty Twenty Two [Member]	Debt Instrument Interest Rate Effective Percentage	0.02239	pure	5
139	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Two Point Seven Percent Due February Twelve Twenty Twenty Five [Member]	Debt Instrument Interest Rate Effective Percentage	0.02772	pure	5
140	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Seven Percent Due February Twelve Twenty Twenty Five [Member]	Debt Instrument Interest Rate Effective Percentage	0.02772	pure	5
141	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Two Point Six Five Percent Due November Three Twenty Twenty Two [Member]	Debt Instrument Interest Rate Effective Percentage	0.02717	pure	5
142	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Six Five Percent Due November Three Twenty Twenty Two [Member]	Debt Instrument Interest Rate Effective Percentage	0.02717	pure	5
143	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Two Point Six Two Five Percent Due May Two Twenty Thirty Three [Member]	Debt Instrument Interest Rate Effective Percentage	0.0269	pure	5
144	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Six Two Five Percent Due May Two Twenty Thirty Three [Member]	Debt Instrument Interest Rate Effective Percentage	0.0269	pure	5
145	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Two Point Three Seven Five Percent Due February Twelve Twenty Twenty Two [Member]	Debt Instrument Interest Rate Effective Percentage	0.02466	pure	5
146	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Three Seven Five Percent Due February Twelve Twenty Twenty Two [Member]	Debt Instrument Interest Rate Effective Percentage	0.02466	pure	5
147	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Two Point Three Seven Five Percent Due May One Twenty Twenty Three [Member]	Debt Instrument Interest Rate Effective Percentage	0.02465	pure	5
148	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Three Seven Five Percent Due May One Twenty Twenty Three [Member]	Debt Instrument Interest Rate Effective Percentage	0.02465	pure	5
149	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Zero Percent Due August Eight Twenty Twenty Three [Member]	Debt Instrument Interest Rate Effective Percentage	0.02101	pure	5
150	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Two Point Zero Percent Due November Three Twenty Twenty [Member]	Debt Instrument Interest Rate Effective Percentage	0.02093	pure	5
151	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Zero Percent Due November Three Twenty Twenty [Member]	Debt Instrument Interest Rate Effective Percentage	0.02093	pure	5
152	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Zero Point Eight Seven Five Percent Due November Fifteen Twenty Seventeen [Member]	Debt Instrument Interest Rate Effective Percentage	0.01084	pure	5
153	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Zero Point Eight Seven Five Percent Due November Fifteen Twenty Seventeen [Member]	Debt Instrument Interest Rate Effective Percentage	0.01084	pure	5
154	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Zero Point Five Percent Due November One Twenty Nineteen [Member]	Debt Instrument Interest Rate Effective Percentage	0.005	pure	5
155	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Five Point Three Percent Due February Eight Twenty Forty One [Member]	Debt Instrument Interest Rate Stated Percentage	0.053	pure	INF
156	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Five Point Three Percent Due February Eight Twenty Forty One [Member]	Debt Instrument Interest Rate Stated Percentage	0.053	pure	INF
157	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Five Point Two Percent Due June One Twenty Thirty Nine [Member]	Debt Instrument Interest Rate Stated Percentage	0.052	pure	INF
158	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Five Point Two Percent Due June One Twenty Thirty Nine [Member]	Debt Instrument Interest Rate Stated Percentage	0.052	pure	INF
159	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Percent Due February Twelve Twenty Fifty Five [Member]	Debt Instrument Interest Rate Stated Percentage	0.04	pure	INF
160	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Percent Due February Twelve Twenty Fifty Five [Member]	Debt Instrument Interest Rate Stated Percentage	0.04	pure	INF
161	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Point Eight Seven Five Percent Due December Fifteen Twenty Forty Three [Member]	Debt Instrument Interest Rate Stated Percentage	0.04875	pure	INF
162	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Eight Seven Five Percent Due December Fifteen Twenty Forty Three [Member]	Debt Instrument Interest Rate Stated Percentage	0.04875	pure	INF
163	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Five Percent Due February Six Twenty Fifty Seven [Member]	Debt Instrument Interest Rate Stated Percentage	0.045	pure	INF
164	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Point Five Percent Due October One Twenty Forty [Member]	Debt Instrument Interest Rate Stated Percentage	0.045	pure	INF
165	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Five Percent Due October One Twenty Forty [Member]	Debt Instrument Interest Rate Stated Percentage	0.045	pure	INF
166	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Point Four Five Percent Due November Three Twenty Forty Five [Member]	Debt Instrument Interest Rate Stated Percentage	0.0445	pure	INF
167	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Four Five Percent Due November Three Twenty Forty Five [Member]	Debt Instrument Interest Rate Stated Percentage	0.0445	pure	INF
168	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point One Percent Due February Six Twenty Thirty Seven [Member]	Debt Instrument Interest Rate Stated Percentage	0.041	pure	INF
169	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Point Seven Five Percent Due November Three Twenty Fifty Five [Member]	Debt Instrument Interest Rate Stated Percentage	0.0475	pure	INF
170	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Seven Five Percent Due November Three Twenty Fifty Five [Member]	Debt Instrument Interest Rate Stated Percentage	0.0475	pure	INF
171	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Two Five Percent Due February Six Twenty Forty Seven [Member]	Debt Instrument Interest Rate Stated Percentage	0.0425	pure	INF
172	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Point Two Percent Due June One Twenty Nineteen [Member]	Debt Instrument Interest Rate Stated Percentage	0.042	pure	INF
173	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Two Percent Due June One Twenty Nineteen [Member]	Debt Instrument Interest Rate Stated Percentage	0.042	pure	INF
174	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Point Two Percent Due November Three Twenty Thirty Five [Member]	Debt Instrument Interest Rate Stated Percentage	0.042	pure	INF
175	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Two Percent Due November Three Twenty Thirty Five [Member]	Debt Instrument Interest Rate Stated Percentage	0.042	pure	INF
176	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Point Zero Percent Due February Eight Twenty Twenty One [Member]	Debt Instrument Interest Rate Stated Percentage	0.04	pure	INF
177	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Point Zero Percent Due February Eight Twenty Twenty One [Member]	Debt Instrument Interest Rate Stated Percentage	0.04	pure	INF
178	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes One Point Eight Five Percent Due February Six Twenty Twenty [Member]	Debt Instrument Interest Rate Stated Percentage	0.0185	pure	INF
179	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes One Point Eight Five Percent Due February Twelve Twenty Twenty [Member]	Debt Instrument Interest Rate Stated Percentage	0.0185	pure	INF
180	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes One Point Eight Five Percent Due February Twelve Twenty Twenty [Member]	Debt Instrument Interest Rate Stated Percentage	0.0185	pure	INF
181	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes One Point Five Five Percent Due August Eight Twenty Twenty One [Member]	Debt Instrument Interest Rate Stated Percentage	0.0155	pure	INF
182	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes One Point One Percent Due August Eight Twenty Nineteen [Member]	Debt Instrument Interest Rate Stated Percentage	0.011	pure	INF
183	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes One Point Six Two Five Percent Due December Six Twenty Eighteen [Member]	Debt Instrument Interest Rate Stated Percentage	0.01625	pure	INF
184	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes One Point Six Two Five Percent Due December Six Twenty Eighteen [Member]	Debt Instrument Interest Rate Stated Percentage	0.01625	pure	INF
185	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes One Point Three Zero Percent Due November Three Twenty Eighteen [Member]	Debt Instrument Interest Rate Stated Percentage	0.013	pure	INF
186	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes One Point Three Zero Percent Due November Three Twenty Eighteen [Member]	Debt Instrument Interest Rate Stated Percentage	0.013	pure	INF
187	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes One Point Zero Percent Due May One Twenty Eighteen [Member]	Debt Instrument Interest Rate Stated Percentage	0.01	pure	INF
188	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes One Point Zero Percent Due May One Twenty Eighteen [Member]	Debt Instrument Interest Rate Stated Percentage	0.01	pure	INF
189	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Three Point Five Percent Due February Twelve Twenty Thirty Five [Member]	Debt Instrument Interest Rate Stated Percentage	0.035	pure	INF
190	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Five Percent Due February Twelve Twenty Thirty Five [Member]	Debt Instrument Interest Rate Stated Percentage	0.035	pure	INF
191	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Three Point Five Percent Due November Fifteen Twenty Forty Two [Member]	Debt Instrument Interest Rate Stated Percentage	0.035	pure	INF
192	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Five Percent Due November Fifteen Twenty Forty Two [Member]	Debt Instrument Interest Rate Stated Percentage	0.035	pure	INF
193	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Four Five Percent Due August Eight Twenty Thirty Six [Member]	Debt Instrument Interest Rate Stated Percentage	0.0345	pure	INF
194	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Nine Five Percent Due August Eight Twenty Fifty Six [Member]	Debt Instrument Interest Rate Stated Percentage	0.0395	pure	INF
195	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Three Point One Two Five Percent Due December Six Twenty Twenty Eight [Member]	Debt Instrument Interest Rate Stated Percentage	0.03125	pure	INF
196	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point One Two Five Percent Due December Six Twenty Twenty Eight [Member]	Debt Instrument Interest Rate Stated Percentage	0.03125	pure	INF
197	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Three Point One Two Five Percent Due November Three Twenty Twenty Five [Member]	Debt Instrument Interest Rate Stated Percentage	0.03125	pure	INF
198	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point One Two Five Percent Due November Three Twenty Twenty Five [Member]	Debt Instrument Interest Rate Stated Percentage	0.03125	pure	INF
199	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Three Point Seven Five Percent Due February Twelve Twenty Forty Five [Member]	Debt Instrument Interest Rate Stated Percentage	0.0375	pure	INF
200	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Seven Five Percent Due February Twelve Twenty Forty Five [Member]	Debt Instrument Interest Rate Stated Percentage	0.0375	pure	INF
201	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Three Point Seven Five Percent Due May One Twenty Forty Three [Member]	Debt Instrument Interest Rate Stated Percentage	0.0375	pure	INF
202	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Seven Five Percent Due May One Twenty Forty Three [Member]	Debt Instrument Interest Rate Stated Percentage	0.0375	pure	INF
203	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Seven Percent Due August Eight Twenty Forty Six [Member]	Debt Instrument Interest Rate Stated Percentage	0.037	pure	INF
204	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Three Point Six Two Five Percent Due December Fifteen Twenty Twenty Three [Member]	Debt Instrument Interest Rate Stated Percentage	0.03625	pure	INF
205	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Six Two Five Percent Due December Fifteen Twenty Twenty Three [Member]	Debt Instrument Interest Rate Stated Percentage	0.03625	pure	INF
206	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Three Percent Due February Six Twenty Twenty Seven [Member]	Debt Instrument Interest Rate Stated Percentage	0.033	pure	INF
207	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Three Point Zero Percent Due October One Twenty Twenty [Member]	Debt Instrument Interest Rate Stated Percentage	0.03	pure	INF
208	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Three Point Zero Percent Due October One Twenty Twenty [Member]	Debt Instrument Interest Rate Stated Percentage	0.03	pure	INF
209	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Eight Seven Five Percent Due February Six Twenty Twenty Four [Member]	Debt Instrument Interest Rate Stated Percentage	0.02875	pure	INF
210	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Four Percent Due August Eight Twenty Twenty Six [Member]	Debt Instrument Interest Rate Stated Percentage	0.024	pure	INF
211	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Four Percent Due February Six Twenty Twenty Two [Member]	Debt Instrument Interest Rate Stated Percentage	0.024	pure	INF
212	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Two Point One Two Five Percent Due December Six Twenty Twenty One [Member]	Debt Instrument Interest Rate Stated Percentage	0.02125	pure	INF
213	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point One Two Five Percent Due December Six Twenty Twenty One [Member]	Debt Instrument Interest Rate Stated Percentage	0.02125	pure	INF
214	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Two Point One Two Five Percent Due November Fifteen Twenty Twenty Two [Member]	Debt Instrument Interest Rate Stated Percentage	0.02125	pure	INF
215	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point One Two Five Percent Due November Fifteen Twenty Twenty Two [Member]	Debt Instrument Interest Rate Stated Percentage	0.02125	pure	INF
216	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Two Point Seven Percent Due February Twelve Twenty Twenty Five [Member]	Debt Instrument Interest Rate Stated Percentage	0.027	pure	INF
217	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Seven Percent Due February Twelve Twenty Twenty Five [Member]	Debt Instrument Interest Rate Stated Percentage	0.027	pure	INF
218	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Two Point Six Five Percent Due November Three Twenty Twenty Two [Member]	Debt Instrument Interest Rate Stated Percentage	0.0265	pure	INF
219	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Six Five Percent Due November Three Twenty Twenty Two [Member]	Debt Instrument Interest Rate Stated Percentage	0.0265	pure	INF
220	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Two Point Six Two Five Percent Due May Two Twenty Thirty Three [Member]	Debt Instrument Interest Rate Stated Percentage	0.02625	pure	INF
221	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Six Two Five Percent Due May Two Twenty Thirty Three [Member]	Debt Instrument Interest Rate Stated Percentage	0.02625	pure	INF
222	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Two Point Three Seven Five Percent Due February Twelve Twenty Twenty Two [Member]	Debt Instrument Interest Rate Stated Percentage	0.02375	pure	INF
223	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Three Seven Five Percent Due February Twelve Twenty Twenty Two [Member]	Debt Instrument Interest Rate Stated Percentage	0.02375	pure	INF
224	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Two Point Three Seven Five Percent Due May One Twenty Twenty Three [Member]	Debt Instrument Interest Rate Stated Percentage	0.02375	pure	INF
225	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Three Seven Five Percent Due May One Twenty Twenty Three [Member]	Debt Instrument Interest Rate Stated Percentage	0.02375	pure	INF
226	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Zero Percent Due August Eight Twenty Twenty Three [Member]	Debt Instrument Interest Rate Stated Percentage	0.02	pure	INF
227	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Two Point Zero Percent Due November Three Twenty Twenty [Member]	Debt Instrument Interest Rate Stated Percentage	0.02	pure	INF
228	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Two Point Zero Percent Due November Three Twenty Twenty [Member]	Debt Instrument Interest Rate Stated Percentage	0.02	pure	INF
229	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Zero Point Eight Seven Five Percent Due November Fifteen Twenty Seventeen [Member]	Debt Instrument Interest Rate Stated Percentage	0.00875	pure	INF
230	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Zero Point Eight Seven Five Percent Due November Fifteen Twenty Seventeen [Member]	Debt Instrument Interest Rate Stated Percentage	0.00875	pure	INF
231	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Zero Point Five Percent Due November One Twenty Nineteen [Member]	Debt Instrument Interest Rate Stated Percentage	0.005	pure	INF
232	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Five Point Three Percent Due February Eight Twenty Forty One [Member]	Debt Instrument Maturity Date	2041-02-08
233	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Five Point Three Percent Due February Eight Twenty Forty One [Member]	Debt Instrument Maturity Date	2041-02-08
234	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Five Point Two Percent Due June One Twenty Thirty Nine [Member]	Debt Instrument Maturity Date	2039-06-01
235	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Five Point Two Percent Due June One Twenty Thirty Nine [Member]	Debt Instrument Maturity Date	2039-06-01
236	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Four Percent Due February Twelve Twenty Fifty Five [Member]	Debt Instrument Maturity Date	2055-02-12
237	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Four Percent Due February Twelve Twenty Fifty Five [Member]	Debt Instrument Maturity Date	2055-02-12
238	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Four Point Eight Seven Five Percent Due December Fifteen Twenty Forty Three [Member]	Debt Instrument Maturity Date	2043-12-15
239	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Four Point Eight Seven Five Percent Due December Fifteen Twenty Forty Three [Member]	Debt Instrument Maturity Date	2043-12-15
240	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Four Point Five Percent Due February Six Twenty Fifty Seven [Member]	Debt Instrument Maturity Date	2057-02-06
241	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Four Point Five Percent Due October One Twenty Forty [Member]	Debt Instrument Maturity Date	2040-10-01
242	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Four Point Five Percent Due October One Twenty Forty [Member]	Debt Instrument Maturity Date	2040-10-01
243	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Four Point Four Five Percent Due November Three Twenty Forty Five [Member]	Debt Instrument Maturity Date	2045-11-03
244	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Four Point Four Five Percent Due November Three Twenty Forty Five [Member]	Debt Instrument Maturity Date	2045-11-03
245	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Four Point One Percent Due February Six Twenty Thirty Seven [Member]	Debt Instrument Maturity Date	2037-02-06
246	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Four Point Seven Five Percent Due November Three Twenty Fifty Five [Member]	Debt Instrument Maturity Date	2055-11-03
247	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Four Point Seven Five Percent Due November Three Twenty Fifty Five [Member]	Debt Instrument Maturity Date	2055-11-03
248	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Four Point Two Five Percent Due February Six Twenty Forty Seven [Member]	Debt Instrument Maturity Date	2047-02-06
249	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Four Point Two Percent Due June One Twenty Nineteen [Member]	Debt Instrument Maturity Date	2019-06-01
250	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Four Point Two Percent Due June One Twenty Nineteen [Member]	Debt Instrument Maturity Date	2019-06-01
251	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Four Point Two Percent Due November Three Twenty Thirty Five [Member]	Debt Instrument Maturity Date	2035-11-03
252	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Four Point Two Percent Due November Three Twenty Thirty Five [Member]	Debt Instrument Maturity Date	2035-11-03
253	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Four Point Zero Percent Due February Eight Twenty Twenty One [Member]	Debt Instrument Maturity Date	2021-02-08
254	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Four Point Zero Percent Due February Eight Twenty Twenty One [Member]	Debt Instrument Maturity Date	2021-02-08
255	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes One Point Eight Five Percent Due February Six Twenty Twenty [Member]	Debt Instrument Maturity Date	2020-02-06
256	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes One Point Eight Five Percent Due February Twelve Twenty Twenty [Member]	Debt Instrument Maturity Date	2020-02-12
257	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes One Point Eight Five Percent Due February Twelve Twenty Twenty [Member]	Debt Instrument Maturity Date	2020-02-12
258	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes One Point Five Five Percent Due August Eight Twenty Twenty One [Member]	Debt Instrument Maturity Date	2021-08-08
259	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes One Point One Percent Due August Eight Twenty Nineteen [Member]	Debt Instrument Maturity Date	2019-08-08
260	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes One Point Six Two Five Percent Due December Six Twenty Eighteen [Member]	Debt Instrument Maturity Date	2018-12-06
261	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes One Point Six Two Five Percent Due December Six Twenty Eighteen [Member]	Debt Instrument Maturity Date	2018-12-06
262	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes One Point Three Zero Percent Due November Three Twenty Eighteen [Member]	Debt Instrument Maturity Date	2018-11-03
263	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes One Point Three Zero Percent Due November Three Twenty Eighteen [Member]	Debt Instrument Maturity Date	2018-11-03
264	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes One Point Zero Percent Due May One Twenty Eighteen [Member]	Debt Instrument Maturity Date	2018-05-01
265	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes One Point Zero Percent Due May One Twenty Eighteen [Member]	Debt Instrument Maturity Date	2018-05-01
266	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Three Point Five Percent Due February Twelve Twenty Thirty Five [Member]	Debt Instrument Maturity Date	2035-02-12
267	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Three Point Five Percent Due February Twelve Twenty Thirty Five [Member]	Debt Instrument Maturity Date	2035-02-12
268	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Three Point Five Percent Due November Fifteen Twenty Forty Two [Member]	Debt Instrument Maturity Date	2042-11-15
269	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Three Point Five Percent Due November Fifteen Twenty Forty Two [Member]	Debt Instrument Maturity Date	2042-11-15
270	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Three Point Four Five Percent Due August Eight Twenty Thirty Six [Member]	Debt Instrument Maturity Date	2036-08-08
271	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Three Point Nine Five Percent Due August Eight Twenty Fifty Six [Member]	Debt Instrument Maturity Date	2056-08-08
272	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Three Point One Two Five Percent Due December Six Twenty Twenty Eight [Member]	Debt Instrument Maturity Date	2028-12-06
273	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Three Point One Two Five Percent Due December Six Twenty Twenty Eight [Member]	Debt Instrument Maturity Date	2028-12-06
274	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Three Point One Two Five Percent Due November Three Twenty Twenty Five [Member]	Debt Instrument Maturity Date	2025-11-03
275	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Three Point One Two Five Percent Due November Three Twenty Twenty Five [Member]	Debt Instrument Maturity Date	2025-11-03
276	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Three Point Seven Five Percent Due February Twelve Twenty Forty Five [Member]	Debt Instrument Maturity Date	2045-02-12
277	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Three Point Seven Five Percent Due February Twelve Twenty Forty Five [Member]	Debt Instrument Maturity Date	2045-02-12
278	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Three Point Seven Five Percent Due May One Twenty Forty Three [Member]	Debt Instrument Maturity Date	2043-05-01
279	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Three Point Seven Five Percent Due May One Twenty Forty Three [Member]	Debt Instrument Maturity Date	2043-05-01
280	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Three Point Seven Percent Due August Eight Twenty Forty Six [Member]	Debt Instrument Maturity Date	2046-08-08
281	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Three Point Six Two Five Percent Due December Fifteen Twenty Twenty Three [Member]	Debt Instrument Maturity Date	2023-12-15
282	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Three Point Six Two Five Percent Due December Fifteen Twenty Twenty Three [Member]	Debt Instrument Maturity Date	2023-12-15
283	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Three Point Three Percent Due February Six Twenty Twenty Seven [Member]	Debt Instrument Maturity Date	2027-02-06
284	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Three Point Zero Percent Due October One Twenty Twenty [Member]	Debt Instrument Maturity Date	2020-10-01
285	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Three Point Zero Percent Due October One Twenty Twenty [Member]	Debt Instrument Maturity Date	2020-10-01
286	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Two Point Eight Seven Five Percent Due February Six Twenty Twenty Four [Member]	Debt Instrument Maturity Date	2024-02-06
287	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Two Point Four Percent Due August Eight Twenty Twenty Six [Member]	Debt Instrument Maturity Date	2026-08-08
288	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Two Point Four Percent Due February Six Twenty Twenty Two [Member]	Debt Instrument Maturity Date	2022-02-06
289	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Two Point One Two Five Percent Due December Six Twenty Twenty One [Member]	Debt Instrument Maturity Date	2021-12-06
290	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Two Point One Two Five Percent Due December Six Twenty Twenty One [Member]	Debt Instrument Maturity Date	2021-12-06
291	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Two Point One Two Five Percent Due November Fifteen Twenty Twenty Two [Member]	Debt Instrument Maturity Date	2022-11-15
292	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Two Point One Two Five Percent Due November Fifteen Twenty Twenty Two [Member]	Debt Instrument Maturity Date	2022-11-15
293	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Two Point Seven Percent Due February Twelve Twenty Twenty Five [Member]	Debt Instrument Maturity Date	2025-02-12
294	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Two Point Seven Percent Due February Twelve Twenty Twenty Five [Member]	Debt Instrument Maturity Date	2025-02-12
295	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Two Point Six Five Percent Due November Three Twenty Twenty Two [Member]	Debt Instrument Maturity Date	2022-11-03
296	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Two Point Six Five Percent Due November Three Twenty Twenty Two [Member]	Debt Instrument Maturity Date	2022-11-03
297	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Two Point Six Two Five Percent Due May Two Twenty Thirty Three [Member]	Debt Instrument Maturity Date	2033-05-02
298	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Two Point Six Two Five Percent Due May Two Twenty Thirty Three [Member]	Debt Instrument Maturity Date	2033-05-02
299	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Two Point Three Seven Five Percent Due February Twelve Twenty Twenty Two [Member]	Debt Instrument Maturity Date	2022-02-12
300	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Two Point Three Seven Five Percent Due February Twelve Twenty Twenty Two [Member]	Debt Instrument Maturity Date	2022-02-12
301	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Two Point Three Seven Five Percent Due May One Twenty Twenty Three [Member]	Debt Instrument Maturity Date	2023-05-01
302	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Two Point Three Seven Five Percent Due May One Twenty Twenty Three [Member]	Debt Instrument Maturity Date	2023-05-01
303	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Two Point Zero Percent Due August Eight Twenty Twenty Three [Member]	Debt Instrument Maturity Date	2023-08-08
304	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Two Point Zero Percent Due November Three Twenty Twenty [Member]	Debt Instrument Maturity Date	2020-11-03
305	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Two Point Zero Percent Due November Three Twenty Twenty [Member]	Debt Instrument Maturity Date	2020-11-03
306	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Notes Zero Point Eight Seven Five Percent Due November Fifteen Twenty Seventeen [Member]	Debt Instrument Maturity Date	2017-11-15
307	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Zero Point Eight Seven Five Percent Due November Fifteen Twenty Seventeen [Member]	Debt Instrument Maturity Date	2017-11-15
308	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Notes Zero Point Five Percent Due November One Twenty Nineteen [Member]	Debt Instrument Maturity Date	2019-11-01

Fact Table
Network	100890 - Disclosure - Long-term Debt (Parenthetical) (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureLongTermDebtParentheticalDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations
1	0000789019 (http://www.sec.gov/CIK)	2016-08-31	U S D Debt Issued In Period [Member]	us-gaap:DebtInstrumentFaceAmount (label)	19800000000		iso4217:USD	-8
2	0000789019 (http://www.sec.gov/CIK)	2017-02-28	U S D Debt Issued In Period [Member]	us-gaap:DebtInstrumentFaceAmount (label)	17000000000		iso4217:USD	-8

Fact Table
Network	100900 - Disclosure - Maturities of Long-term Debt (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureMaturitiesOfLongTermDebtDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100910 - Disclosure - Provision for Income Taxes (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureProvisionForIncomeTaxesDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100920 - Disclosure - Income Taxes - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Regional Operating Centers [Member]	Foreign Earnings Taxed At Rates Lower Than Us Rate	0.73	pure	2
2	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Regional Operating Centers [Member]	Foreign Earnings Taxed At Rates Lower Than Us Rate	0.69	pure	2
3	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Regional Operating Centers [Member]	Foreign Earnings Taxed At Rates Lower Than Us Rate	0.64	pure	2
4	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Income Statement Location [Domain]	Accrued Income Taxes Noncurrent	11800000000	iso4217:USD	-8
5	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Income Tax Authority [Domain]	Accrued Income Taxes Noncurrent	11800000000	iso4217:USD	-8
6	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Statement Location [Domain]	Accrued Income Taxes Noncurrent	13500000000	iso4217:USD	-8
7	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Tax Authority [Domain]	Accrued Income Taxes Noncurrent	13500000000	iso4217:USD	-8
8	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Income Statement Location [Domain]	Deferred Federal State And Local Tax Expense Benefit	-2700000000	iso4217:USD	-8
9	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Income Tax Authority [Domain]	Deferred Federal State And Local Tax Expense Benefit	-2700000000	iso4217:USD	-8
10	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Income Statement Location [Domain]	Deferred Foreign Income Tax Expense Benefit	-617000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Income Tax Authority [Domain]	Deferred Foreign Income Tax Expense Benefit	-617000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Income Statement Location [Domain]	us-gaap:DeferredTaxAssetsOperatingLossCarryforwards (label)	4252000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Income Tax Authority [Domain]	us-gaap:DeferredTaxAssetsOperatingLossCarryforwards (label)	4252000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Statement Location [Domain]	us-gaap:DeferredTaxAssetsOperatingLossCarryforwards (label)	4809000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Tax Authority [Domain]	us-gaap:DeferredTaxAssetsOperatingLossCarryforwards (label)	4809000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Restatement Adjustment [Member]	us-gaap:DeferredTaxAssetsOperatingLossCarryforwards (label)	2500000000	iso4217:USD	-8
17	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Income Statement Location [Domain]	us-gaap:DeferredTaxAssetsValuationAllowance (label)	4729000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Income Tax Authority [Domain]	us-gaap:DeferredTaxAssetsValuationAllowance (label)	4729000000	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Statement Location [Domain]	us-gaap:DeferredTaxAssetsValuationAllowance (label)	3310000000	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Tax Authority [Domain]	us-gaap:DeferredTaxAssetsValuationAllowance (label)	3310000000	iso4217:USD	-6
21	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Restatement Adjustment [Member]	us-gaap:DeferredTaxAssetsValuationAllowance (label)	2500000000	iso4217:USD	-8
22	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Statement Location [Domain]	Deferred Tax Liability Not Recognized Amount Of Unrecognized Deferred Tax Liability Undistributed Earnings Of Foreign Subsidiaries	45000000000	iso4217:USD	-9
23	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Tax Authority [Domain]	Deferred Tax Liability Not Recognized Amount Of Unrecognized Deferred Tax Liability Undistributed Earnings Of Foreign Subsidiaries	45000000000	iso4217:USD	-9
24	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Income Statement Location [Domain]	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic (label)	7363000000	iso4217:USD	-6
25	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Income Tax Authority [Domain]	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic (label)	7363000000	iso4217:USD	-6
26	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Income Statement Location [Domain]	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic (label)	-325000000	iso4217:USD	-6
27	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Income Tax Authority [Domain]	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic (label)	-325000000	iso4217:USD	-6
28	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Income Statement Location [Domain]	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic (label)	453000000	iso4217:USD	-6
29	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Income Tax Authority [Domain]	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic (label)	453000000	iso4217:USD	-6
30	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	msft:WindowsTenDeferralMember (label)	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic (label)	6000000000	iso4217:USD	-8
31	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	msft:WindowsTenDeferralMember (label)	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic (label)	6400000000	iso4217:USD	-8
32	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Impairment Integration And Restructuring Expenses [Member]	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic (label)	-1100000000	iso4217:USD	-8
33	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Phone Business [Member]	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic (label)	-1100000000	iso4217:USD	-8
34	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Income Statement Location [Domain]	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign (label)	11144000000	iso4217:USD	-6
35	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Income Tax Authority [Domain]	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign (label)	11144000000	iso4217:USD	-6
36	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Income Statement Location [Domain]	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign (label)	20076000000	iso4217:USD	-6
37	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Income Tax Authority [Domain]	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign (label)	20076000000	iso4217:USD	-6
38	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Income Statement Location [Domain]	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign (label)	22696000000	iso4217:USD	-6
39	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Income Tax Authority [Domain]	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign (label)	22696000000	iso4217:USD	-6
40	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	msft:WindowsTenDeferralMember (label)	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign (label)	588000000	iso4217:USD	-6
41	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	msft:WindowsTenDeferralMember (label)	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign (label)	317000000	iso4217:USD	-6
42	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Impairment Integration And Restructuring Expenses [Member]	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign (label)	-8900000000	iso4217:USD	-8
43	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Phone Business [Member]	us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign (label)	-8900000000	iso4217:USD	-8
44	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Income Statement Location [Domain]	Income Taxes Paid Net	4400000000	iso4217:USD	-8
45	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Income Tax Authority [Domain]	Income Taxes Paid Net	4400000000	iso4217:USD	-8
46	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Income Statement Location [Domain]	Income Taxes Paid Net	3900000000	iso4217:USD	-8
47	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Income Tax Authority [Domain]	Income Taxes Paid Net	3900000000	iso4217:USD	-8
48	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Income Statement Location [Domain]	Income Taxes Paid Net	2400000000	iso4217:USD	-8
49	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Income Tax Authority [Domain]	Income Taxes Paid Net	2400000000	iso4217:USD	-8
50	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Statement Location [Domain]	Operating Loss Carryforwards	13700000000	iso4217:USD	-8
51	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Tax Authority [Domain]	Operating Loss Carryforwards	13700000000	iso4217:USD	-8
52	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Country [Member]	Operating Loss Carryforwards	11100000000	iso4217:USD	-8
53	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Statement Location [Domain]	Undistributed Earnings Of Foreign Subsidiaries	142000000000	iso4217:USD	-9
54	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Tax Authority [Domain]	Undistributed Earnings Of Foreign Subsidiaries	142000000000	iso4217:USD	-9
55	0000789019 (http://www.sec.gov/CIK)	2014-06-30	Income Statement Location [Domain]	us-gaap:UnrecognizedTaxBenefits (label)	8714000000	iso4217:USD	-6
56	0000789019 (http://www.sec.gov/CIK)	2014-06-30	Income Tax Authority [Domain]	us-gaap:UnrecognizedTaxBenefits (label)	8714000000	iso4217:USD	-6
57	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Income Statement Location [Domain]	us-gaap:UnrecognizedTaxBenefits (label)	9599000000	iso4217:USD	-6
58	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Income Tax Authority [Domain]	us-gaap:UnrecognizedTaxBenefits (label)	9599000000	iso4217:USD	-6
59	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Income Statement Location [Domain]	us-gaap:UnrecognizedTaxBenefits (label)	10164000000	iso4217:USD	-6
60	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Income Tax Authority [Domain]	us-gaap:UnrecognizedTaxBenefits (label)	10164000000	iso4217:USD	-6
61	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Statement Location [Domain]	us-gaap:UnrecognizedTaxBenefits (label)	11737000000	iso4217:USD	-6
62	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Tax Authority [Domain]	us-gaap:UnrecognizedTaxBenefits (label)	11737000000	iso4217:USD	-6
63	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Income Statement Location [Domain]	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued	1700000000	iso4217:USD	-8
64	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Income Tax Authority [Domain]	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued	1700000000	iso4217:USD	-8
65	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Income Statement Location [Domain]	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued	1900000000	iso4217:USD	-8
66	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Income Tax Authority [Domain]	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued	1900000000	iso4217:USD	-8
67	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Statement Location [Domain]	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued	2300000000	iso4217:USD	-8
68	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Tax Authority [Domain]	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued	2300000000	iso4217:USD	-8
69	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Income Statement Location [Domain]	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense	237000000	iso4217:USD	-6
70	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Income Tax Authority [Domain]	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense	237000000	iso4217:USD	-6
71	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Income Statement Location [Domain]	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense	163000000	iso4217:USD	-6
72	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Income Tax Authority [Domain]	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense	163000000	iso4217:USD	-6
73	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Income Statement Location [Domain]	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense	399000000	iso4217:USD	-6
74	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Income Tax Authority [Domain]	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense	399000000	iso4217:USD	-6
75	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Income Statement Location [Domain]	Unrecognized Tax Benefits That Would Impact Effective Tax Rate	7900000000	iso4217:USD	-8
76	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Income Tax Authority [Domain]	Unrecognized Tax Benefits That Would Impact Effective Tax Rate	7900000000	iso4217:USD	-8
77	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Income Statement Location [Domain]	Unrecognized Tax Benefits That Would Impact Effective Tax Rate	8800000000	iso4217:USD	-8
78	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Income Tax Authority [Domain]	Unrecognized Tax Benefits That Would Impact Effective Tax Rate	8800000000	iso4217:USD	-8
79	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Statement Location [Domain]	Unrecognized Tax Benefits That Would Impact Effective Tax Rate	10200000000	iso4217:USD	-8
80	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Tax Authority [Domain]	Unrecognized Tax Benefits That Would Impact Effective Tax Rate	10200000000	iso4217:USD	-8

Fact Table
Network	100930 - Disclosure - Income (Loss) Before Income Taxes (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureIncomeLossBeforeIncomeTaxesDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100940 - Disclosure - Difference Between Income Taxes Computed at Federal Statutory Rate and Provision for Income Taxes (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureDifferenceBetweenIncomeTaxesComputedAtFederalStatutoryRateAndProvisionForIncomeTaxesDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100950 - Disclosure - Deferred Income Tax Assets and Liabilities (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureDeferredIncomeTaxAssetsAndLiabilitiesDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Noncurrent Assets [Member]	Deferred Tax Assets Liabilities Net	219000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Assets [Member]	Deferred Tax Assets Liabilities Net	2412000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Deferred Income Tax Liabilities Noncurrent [Member]	Deferred Tax Liabilities	1476000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Deferred Income Tax Liabilities Noncurrent [Member]	Deferred Tax Liabilities	531000000	iso4217:USD	-6

Fact Table
Network	100960 - Disclosure - Changes in Unrecognized Tax Benefits (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureChangesInUnrecognizedTaxBenefitsDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	100970 - Disclosure - Income Taxes - Additional Information Regarding Examinations (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationRegardingExaminationsDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value
1	0000789019 (http://www.sec.gov/CIK)	2011-01-01 to 2011-03-31	Internal Revenue Service I R S [Member]	Income Tax Examination Year Under Examination	2004
2	0000789019 (http://www.sec.gov/CIK)	2011-01-01 to 2011-03-31	Earliest Tax Year [Member]	Income Tax Examination Year Under Examination	2004
3	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Internal Revenue Service I R S [Member]	Income Tax Examination Year Under Examination	2007
4	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Earliest Tax Year [Member]	Income Tax Examination Year Under Examination	2007
5	0000789019 (http://www.sec.gov/CIK)	2011-01-01 to 2011-03-31	Internal Revenue Service I R S [Member]	Income Tax Examination Year Under Examination	2006
6	0000789019 (http://www.sec.gov/CIK)	2011-01-01 to 2011-03-31	Latest Tax Year [Member]	Income Tax Examination Year Under Examination	2006
7	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Internal Revenue Service I R S [Member]	Income Tax Examination Year Under Examination	2009
8	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Latest Tax Year [Member]	Income Tax Examination Year Under Examination	2009
9	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Foreign Country [Member]	Open Tax Year	1996
10	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Earliest Tax Year [Member]	Open Tax Year	1996
11	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Foreign Country [Member]	Open Tax Year	2017
12	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Latest Tax Year [Member]	Open Tax Year	2017
13	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Internal Revenue Service I R S [Member]	Open Tax Year	2010
14	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Earliest Tax Year [Member]	Open Tax Year	2010
15	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Internal Revenue Service I R S [Member]	Open Tax Year	2016
16	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Latest Tax Year [Member]	Open Tax Year	2016

Fact Table
Network	100980 - Disclosure - Restructuring Charges - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureRestructuringChargesAdditionalInformationDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Phone Hardware Restructuring Plan [Member]	Restructuring And Related Activities Completion Date	2017-06-30
2	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Twenty Seventeen Restructuring Plan [Member]	Restructuring And Related Activities Completion Date	2018-06-30
3	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	msft:TwentySixteenRestructuringPlanMember (label)	Restructuring And Related Activities Completion Date	2017-06-30
4	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Phone Hardware Restructuring Plan [Member]	Restructuring And Related Cost Number Of Positions Eliminated	7400	msft:Position	0
5	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	msft:TwentySixteenRestructuringPlanMember (label)	Restructuring And Related Cost Number Of Positions Eliminated	4700	msft:Position	0
6	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Type Of Restructuring [Domain]	Restructuring Charges	306000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Restructuring Plan [Domain]	Restructuring Charges	306000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Employee Severance [Member]	Restructuring Charges	306000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Employee Severance [Member]	Restructuring Charges	306000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Employee Severance [Member]	Restructuring Charges	306000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Twenty Seventeen Restructuring Plan [Member]	Restructuring Charges	306000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Phone Hardware Restructuring Plan [Member]	Restructuring Charges	780000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	msft:TwentySixteenRestructuringPlanMember (label)	Restructuring Charges	501000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	msft:TwentySixteenRestructuringPlanMember (label)	Restructuring Charges	480000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Phone Hardware Restructuring Plan [Member]	Restructuring Reserve Accrual Adjustment1	-21000000	iso4217:USD	-6

Fact Table
Network	100990 - Disclosure - Changes in Restructuring Liability (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureChangesInRestructuringLiabilityDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Employee Severance [Member]	Payments For Restructuring	367000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Other Restructuring [Member]	Payments For Restructuring	101000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Employee Severance [Member]	Restructuring Charges	306000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Employee Severance [Member]	Restructuring Charges	306000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Employee Severance [Member]	Restructuring Charges	306000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Other Restructuring [Member]	Restructuring Charges	0	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Employee Severance [Member]	us-gaap:RestructuringReserve (label)	470000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Employee Severance [Member]	us-gaap:RestructuringReserve (label)	373000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Restructuring [Member]	us-gaap:RestructuringReserve (label)	239000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Restructuring [Member]	us-gaap:RestructuringReserve (label)	59000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Employee Severance [Member]	Restructuring Reserve Settled Without Cash2	36000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Other Restructuring [Member]	Restructuring Reserve Settled Without Cash2	79000000	iso4217:USD	-6

Fact Table
Network	101000 - Disclosure - Unearned Revenue by Segment (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureUnearnedRevenueBySegmentDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Consolidation Items [Domain]	Deferred Revenue	33909000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Consolidation Items [Domain]	Deferred Revenue	44479000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate And Reconciling Items [Member]	Deferred Revenue	6606000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate And Reconciling Items [Member]	Deferred Revenue	13304000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Operating Segments [Member]	Deferred Revenue	11472000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Intelligent Cloud [Member]	Deferred Revenue	11472000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Operating Segments [Member]	Deferred Revenue	13464000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Intelligent Cloud [Member]	Deferred Revenue	13464000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Operating Segments [Member]	Deferred Revenue	3334000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2016-06-30	More Personal Computing [Member]	Deferred Revenue	3334000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Operating Segments [Member]	Deferred Revenue	3420000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2017-06-30	More Personal Computing [Member]	Deferred Revenue	3420000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Operating Segments [Member]	Deferred Revenue	12497000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Productivity And Business Processes [Member]	Deferred Revenue	12497000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Operating Segments [Member]	Deferred Revenue	14291000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Productivity And Business Processes [Member]	Deferred Revenue	14291000000	iso4217:USD	-6

Fact Table
Network	101010 - Disclosure - Commitments - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureCommitmentsAdditionalInformationDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Liabilities [Member]	Capital Lease Obligations Current	25000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Liabilities [Member]	Capital Lease Obligations Current	113000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Noncurrent Liabilities [Member]	Capital Lease Obligations Noncurrent	761000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Liabilities [Member]	Capital Lease Obligations Noncurrent	2400000000	iso4217:USD	-8
5	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Building Building Improvements And Leasehold Improvements [Member]	Commitments Fair Value Disclosure	1100000000	iso4217:USD	-8
6	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Building [Member]	Lease And Rental Expense	989000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Building [Member]	Lease And Rental Expense	1000000000	iso4217:USD	-8
8	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Building [Member]	Lease And Rental Expense	1300000000	iso4217:USD	-8
9	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Capital Lease [Member]	Unrecorded Unconditional Purchase Obligation Balance Sheet Amount	3200000000	iso4217:USD	-8

Fact Table
Network	101020 - Disclosure - Future Minimum Rental Commitments Under Non-cancellable Operating Leases (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureFutureMinimumRentalCommitmentsUnderNonCancellableOperatingLeasesDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Building [Member]	Operating Leases Future Minimum Payments Due	7872000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Building [Member]	Operating Leases Future Minimum Payments Due Current	1292000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Building [Member]	Operating Leases Future Minimum Payments Due In Five Years	749000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Building [Member]	Operating Leases Future Minimum Payments Due In Four Years	908000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Building [Member]	Operating Leases Future Minimum Payments Due In Three Years	1115000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Building [Member]	Operating Leases Future Minimum Payments Due In Two Years	1220000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Building [Member]	Operating Leases Future Minimum Payments Due Thereafter	2588000000	iso4217:USD	-6

Fact Table
Network	101030 - Disclosure - Future Minimum Lease Payments under Non-cancellable Capital Leases (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureFutureMinimumLeasePaymentsUnderNonCancellableCapitalLeasesDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	101040 - Disclosure - Future Minimum Lease Payments under Non-cancellable Capital Leases (Parenthetical) (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureFutureMinimumLeasePaymentsUnderNonCancellableCapitalLeasesParentheticalDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	101050 - Disclosure - Contingencies - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureContingenciesAdditionalInformationDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	101060 - Disclosure - Shares of Common Stock Outstanding (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureSharesOfCommonStockOutstandingDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	101070 - Disclosure - Stockholders' Equity - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureStockholdersEquityAdditionalInformationDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-09-20	Share Repurchase Program Twenty Sixteen [Member]	Stock Repurchase Program Authorized Amount1	40000000000	iso4217:USD	INF
2	0000789019 (http://www.sec.gov/CIK)	2013-09-16	Share Repurchase Program Twenty Thirteen [Member]	Stock Repurchase Program Authorized Amount1	40000000000	iso4217:USD	INF
3	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Share Repurchase Program Twenty Sixteen [Member]	Stock Repurchase Program Remaining Authorized Repurchase Amount1	36800000000	iso4217:USD	-8

Fact Table
Network	101080 - Disclosure - Share Repurchases (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureShareRepurchasesDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	Share Repurchase Program Twenty Sixteen [Member]	us-gaap:StockRepurchasedDuringPeriodShares (label)	25000000	shares	-6
2	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Share Repurchase Program Twenty Sixteen [Member]	us-gaap:StockRepurchasedDuringPeriodShares (label)	23000000	shares	-6
3	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2014-09-30	Share Repurchase Program Twenty Thirteen [Member]	us-gaap:StockRepurchasedDuringPeriodShares (label)	43000000	shares	-6
4	0000789019 (http://www.sec.gov/CIK)	2014-10-01 to 2014-12-31	Share Repurchase Program Twenty Thirteen [Member]	us-gaap:StockRepurchasedDuringPeriodShares (label)	43000000	shares	-6
5	0000789019 (http://www.sec.gov/CIK)	2015-01-01 to 2015-03-31	Share Repurchase Program Twenty Thirteen [Member]	us-gaap:StockRepurchasedDuringPeriodShares (label)	116000000	shares	-6
6	0000789019 (http://www.sec.gov/CIK)	2015-04-01 to 2015-06-30	Share Repurchase Program Twenty Thirteen [Member]	us-gaap:StockRepurchasedDuringPeriodShares (label)	93000000	shares	-6
7	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Share Repurchase Program Twenty Thirteen [Member]	us-gaap:StockRepurchasedDuringPeriodShares (label)	89000000	shares	-6
8	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	Share Repurchase Program Twenty Thirteen [Member]	us-gaap:StockRepurchasedDuringPeriodShares (label)	66000000	shares	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	Share Repurchase Program Twenty Thirteen [Member]	us-gaap:StockRepurchasedDuringPeriodShares (label)	69000000	shares	-6
10	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Share Repurchase Program Twenty Thirteen [Member]	us-gaap:StockRepurchasedDuringPeriodShares (label)	70000000	shares	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	Share Repurchase Program Twenty Thirteen [Member]	us-gaap:StockRepurchasedDuringPeriodShares (label)	63000000	shares	-6
12	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	Share Repurchase Program Twenty Thirteen [Member]	us-gaap:StockRepurchasedDuringPeriodShares (label)	59000000	shares	-6
13	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	Share Repurchase Program Twenty Sixteen [Member]	us-gaap:StockRepurchasedDuringPeriodValue (label)	1600000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Share Repurchase Program Twenty Sixteen [Member]	us-gaap:StockRepurchasedDuringPeriodValue (label)	1600000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2014-09-30	Share Repurchase Program Twenty Thirteen [Member]	us-gaap:StockRepurchasedDuringPeriodValue (label)	2000000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2014-10-01 to 2014-12-31	Share Repurchase Program Twenty Thirteen [Member]	us-gaap:StockRepurchasedDuringPeriodValue (label)	2000000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2015-01-01 to 2015-03-31	Share Repurchase Program Twenty Thirteen [Member]	us-gaap:StockRepurchasedDuringPeriodValue (label)	5000000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2015-04-01 to 2015-06-30	Share Repurchase Program Twenty Thirteen [Member]	us-gaap:StockRepurchasedDuringPeriodValue (label)	4209000000	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Share Repurchase Program Twenty Thirteen [Member]	us-gaap:StockRepurchasedDuringPeriodValue (label)	4000000000	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	Share Repurchase Program Twenty Thirteen [Member]	us-gaap:StockRepurchasedDuringPeriodValue (label)	3600000000	iso4217:USD	-6
21	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	Share Repurchase Program Twenty Thirteen [Member]	us-gaap:StockRepurchasedDuringPeriodValue (label)	3600000000	iso4217:USD	-6
22	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Share Repurchase Program Twenty Thirteen [Member]	us-gaap:StockRepurchasedDuringPeriodValue (label)	3600000000	iso4217:USD	-6
23	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	Share Repurchase Program Twenty Thirteen [Member]	us-gaap:StockRepurchasedDuringPeriodValue (label)	3550000000	iso4217:USD	-6
24	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	Share Repurchase Program Twenty Thirteen [Member]	us-gaap:StockRepurchasedDuringPeriodValue (label)	3533000000	iso4217:USD	-6

Fact Table
Network	101090 - Disclosure - Dividends Declared (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureDividendsDeclaredDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	101100 - Disclosure - Summary of Changes in Accumulated Other Comprehensive Income by Component (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureSummaryOfChangesInAccumulatedOtherComprehensiveIncomeByComponentDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	Oci Before Reclassifications Net Of Tax Attributable To Parent	1152000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	Oci Before Reclassifications Net Of Tax Attributable To Parent	351000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	Oci Before Reclassifications Net Of Tax Attributable To Parent	328000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	Oci Before Reclassifications Net Of Tax Attributable To Parent	110000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	Oci Before Reclassifications Net Of Tax Attributable To Parent	219000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	Oci Before Reclassifications Net Of Tax Attributable To Parent	517000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Accumulated Translation Adjustment And Other [Member]	us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (label)	-1383000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Accumulated Translation Adjustment And Other [Member]	us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (label)	-519000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Accumulated Translation Adjustment And Other [Member]	us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (label)	228000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (label)	559000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (label)	-238000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (label)	-218000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (label)	-362000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (label)	-228000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (label)	-1116000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Accumulated Other Comprehensive Income [Member]	us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (label)	-1186000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Accumulated Other Comprehensive Income [Member]	us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (label)	-985000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Accumulated Other Comprehensive Income [Member]	us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (label)	-1106000000	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Nonoperating Income Expense [Member]	Reclassification From Aoci Current Period Before Tax Attributable To Parent	728000000	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	Reclassification From Aoci Current Period Before Tax Attributable To Parent	728000000	iso4217:USD	-6
21	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Nonoperating Income Expense [Member]	Reclassification From Aoci Current Period Before Tax Attributable To Parent	688000000	iso4217:USD	-6
22	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	Reclassification From Aoci Current Period Before Tax Attributable To Parent	688000000	iso4217:USD	-6
23	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Nonoperating Income Expense [Member]	Reclassification From Aoci Current Period Before Tax Attributable To Parent	2513000000	iso4217:USD	-6
24	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	Reclassification From Aoci Current Period Before Tax Attributable To Parent	2513000000	iso4217:USD	-6
25	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Sales [Member]	Reclassification From Aoci Current Period Before Tax Attributable To Parent	608000000	iso4217:USD	-6
26	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	Reclassification From Aoci Current Period Before Tax Attributable To Parent	608000000	iso4217:USD	-6
27	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Sales [Member]	Reclassification From Aoci Current Period Before Tax Attributable To Parent	625000000	iso4217:USD	-6
28	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	Reclassification From Aoci Current Period Before Tax Attributable To Parent	625000000	iso4217:USD	-6
29	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Sales [Member]	Reclassification From Aoci Current Period Before Tax Attributable To Parent	555000000	iso4217:USD	-6
30	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	Reclassification From Aoci Current Period Before Tax Attributable To Parent	555000000	iso4217:USD	-6
31	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent	593000000	iso4217:USD	-6
32	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent	589000000	iso4217:USD	-6
33	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent	546000000	iso4217:USD	-6
34	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent	472000000	iso4217:USD	-6
35	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent	447000000	iso4217:USD	-6
36	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent	1633000000	iso4217:USD	-6
37	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	Reclassification From Aoci Current Period Tax	15000000	iso4217:USD	-6
38	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	Reclassification From Aoci Current Period Tax	36000000	iso4217:USD	-6
39	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	Reclassification From Aoci Current Period Tax	9000000	iso4217:USD	-6
40	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	Reclassification From Aoci Current Period Tax	256000000	iso4217:USD	-6
41	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	Reclassification From Aoci Current Period Tax	241000000	iso4217:USD	-6
42	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	Reclassification From Aoci Current Period Tax	880000000	iso4217:USD	-6
43	0000789019 (http://www.sec.gov/CIK)	2014-06-30	Accumulated Translation Adjustment And Other [Member]	us-gaap:StockholdersEquity (label)	146000000	iso4217:USD	-6
44	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Accumulated Translation Adjustment And Other [Member]	us-gaap:StockholdersEquity (label)	-1237000000	iso4217:USD	-6
45	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accumulated Translation Adjustment And Other [Member]	us-gaap:StockholdersEquity (label)	-1756000000	iso4217:USD	-6
46	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accumulated Translation Adjustment And Other [Member]	us-gaap:StockholdersEquity (label)	-1528000000	iso4217:USD	-6
47	0000789019 (http://www.sec.gov/CIK)	2014-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	us-gaap:StockholdersEquity (label)	31000000	iso4217:USD	-6
48	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	us-gaap:StockholdersEquity (label)	590000000	iso4217:USD	-6
49	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	us-gaap:StockholdersEquity (label)	352000000	iso4217:USD	-6
50	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	us-gaap:StockholdersEquity (label)	134000000	iso4217:USD	-6
51	0000789019 (http://www.sec.gov/CIK)	2014-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	us-gaap:StockholdersEquity (label)	3531000000	iso4217:USD	-6
52	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	us-gaap:StockholdersEquity (label)	3169000000	iso4217:USD	-6
53	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	us-gaap:StockholdersEquity (label)	2941000000	iso4217:USD	-6
54	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	us-gaap:StockholdersEquity (label)	1825000000	iso4217:USD	-6
55	0000789019 (http://www.sec.gov/CIK)	2014-06-30	Accumulated Other Comprehensive Income [Member]	us-gaap:StockholdersEquity (label)	3708000000	iso4217:USD	-6
56	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Accumulated Other Comprehensive Income [Member]	us-gaap:StockholdersEquity (label)	2522000000	iso4217:USD	-6
57	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accumulated Other Comprehensive Income [Member]	us-gaap:StockholdersEquity (label)	1537000000	iso4217:USD	-6
58	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accumulated Other Comprehensive Income [Member]	us-gaap:StockholdersEquity (label)	431000000	iso4217:USD	-6

Fact Table
Network	101110 - Disclosure - Summary of Changes in Accumulated Other Comprehensive Income by Component (Parenthetical) (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureSummaryOfChangesInAccumulatedOtherComprehensiveIncomeByComponentParentheticalDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	Other Comprehensive Income Loss Before Reclassifications Tax	35000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	Other Comprehensive Income Loss Before Reclassifications Tax	24000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	Other Comprehensive Income Loss Before Reclassifications Tax	4000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	Other Comprehensive Income Loss Before Reclassifications Tax	59000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	Other Comprehensive Income Loss Before Reclassifications Tax	120000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	Other Comprehensive Income Loss Before Reclassifications Tax	267000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Accumulated Translation Adjustment And Other [Member]	Other Comprehensive Income Loss Tax Portion Attributable To Parent1	16000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Accumulated Translation Adjustment And Other [Member]	Other Comprehensive Income Loss Tax Portion Attributable To Parent1	-33000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Accumulated Translation Adjustment And Other [Member]	Other Comprehensive Income Loss Tax Portion Attributable To Parent1	9000000	iso4217:USD	-6

Fact Table
Network	101120 - Disclosure - Employee Stock and Savings Plans - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureEmployeeStockAndSavingsPlansAdditionalInformationDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain]	Defined Contribution Plan Cost Recognized	454000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Other Postretirement Benefits Individual Contracts Type Of Deferred Compensation [Domain]	Defined Contribution Plan Cost Recognized	454000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Plan Name [Domain]	Defined Contribution Plan Cost Recognized	454000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain]	Defined Contribution Plan Cost Recognized	549000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Other Postretirement Benefits Individual Contracts Type Of Deferred Compensation [Domain]	Defined Contribution Plan Cost Recognized	549000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Plan Name [Domain]	Defined Contribution Plan Cost Recognized	549000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain]	Defined Contribution Plan Cost Recognized	734000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Other Postretirement Benefits Individual Contracts Type Of Deferred Compensation [Domain]	Defined Contribution Plan Cost Recognized	734000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Plan Name [Domain]	Defined Contribution Plan Cost Recognized	734000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	I R S Compensation Limit [Member]	Defined Contribution Plan Employer Matching Contribution Percent	0.03	pure	INF
11	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	us-gaap:MaximumMember (label)	Defined Contribution Plan Employer Matching Contribution Percent	0.03	pure	INF
12	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-12-31	I R S Compensation Limit [Member]	Defined Contribution Plan Employer Matching Contribution Percent	0.03	pure	INF
13	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-12-31	us-gaap:MaximumMember (label)	Defined Contribution Plan Employer Matching Contribution Percent	0.03	pure	INF
14	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2017-06-30	I R S Compensation Limit [Member]	Defined Contribution Plan Employer Matching Contribution Percent	0.5	pure	INF
15	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2017-06-30	us-gaap:MaximumMember (label)	Defined Contribution Plan Employer Matching Contribution Percent	0.5	pure	INF
16	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	us-gaap:MaximumMember (label)	Defined Contribution Plan Employer Matching Contribution Percent	0.03	pure	INF
17	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-12-31	us-gaap:MaximumMember (label)	Defined Contribution Plan Employer Matching Contribution Percent	0.03	pure	INF
18	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2017-06-30	Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain]	Defined Contribution Plan Employer Matching Contribution Percent Of Match	0.5	pure	INF
19	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2017-06-30	Other Postretirement Benefits Individual Contracts Type Of Deferred Compensation [Domain]	Defined Contribution Plan Employer Matching Contribution Percent Of Match	0.5	pure	INF
20	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2017-06-30	Plan Name [Domain]	Defined Contribution Plan Employer Matching Contribution Percent Of Match	0.5	pure	INF
21	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	First Six Percent Of Participant Contributions [Member]	Defined Contribution Plan Employer Matching Contribution Percent Of Match	0.5	pure	INF
22	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-12-31	First Six Percent Of Participant Contributions [Member]	Defined Contribution Plan Employer Matching Contribution Percent Of Match	0.5	pure	INF
23	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Restricted Stock [Member]	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized	6500000000	iso4217:USD	-8
24	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Restricted Stock [Member]	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1	_1238180
25	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Performance Shares [Member]	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1	_1238770
26	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Executive Incentive Plan [Member]	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1	_1239360
27	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Restricted Stock [Member]	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1	_1239950
28	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:MaximumMember (label)	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1	_1240552
29	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Restricted Stock [Member]	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1	_1241142
30	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:MinimumMember (label)	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1	_1241744
31	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Restricted Stock Units R S U [Member]	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1	_1242334
32	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Executive Incentive Plan [Member]	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1	_1242924
33	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Restricted Stock [Member]	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue (label)	42.36	iso4217:USD/shares	2
34	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Restricted Stock [Member]	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue (label)	41.51	iso4217:USD/shares	2
35	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Restricted Stock [Member]	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue (label)	55.64	iso4217:USD/shares	2
36	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Restricted Stock [Member]	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value	4200000000	iso4217:USD	-8
37	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Restricted Stock [Member]	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value	3900000000	iso4217:USD	-8
38	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Restricted Stock [Member]	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value	4800000000	iso4217:USD	-8
39	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Employee Stock [Member]	Share Based Compensation Arrangement By Share Based Payment Award Maximum Employee Subscription Rate	0.15	pure	INF
40	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Employee Stock [Member]	Share Based Compensation Arrangement By Share Based Payment Award Maximum Employee Subscription Rate	0.15	pure	INF
41	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Employee Stock [Member]	Share Based Compensation Arrangement By Share Based Payment Award Maximum Employee Subscription Rate	0.15	pure	INF
42	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Employee Stock [Member]	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant	129000000	shares	-6
43	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Restricted Stock [Member]	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant	127000000	shares	-6
44	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Employee Stock [Member]	Sharebased Compensation Arrangement By Sharebased Payment Award Purchase Price Of Common Stock Percent	0.9	pure	INF
45	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Employee Stock [Member]	Sharebased Compensation Arrangement By Sharebased Payment Award Purchase Price Of Common Stock Percent	0.9	pure	INF
46	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Employee Stock [Member]	Sharebased Compensation Arrangement By Sharebased Payment Award Purchase Price Of Common Stock Percent	0.9	pure	INF

Fact Table
Network	101130 - Disclosure - Stock-Based Compensation Expense and Related Income Tax Benefits (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureStockBasedCompensationExpenseAndRelatedIncomeTaxBenefitsDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	101140 - Disclosure - Assumptions Used in Estimating the Fair Value of Stock Award Grants (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureAssumptionsUsedInEstimatingFairValueOfStockAwardGrantsDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	us-gaap:MaximumMember (label)	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividends Per Share	0.31	iso4217:USD/shares	INF
2	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	us-gaap:MaximumMember (label)	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividends Per Share	0.36	iso4217:USD/shares	INF
3	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:MaximumMember (label)	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividends Per Share	0.39	iso4217:USD/shares	INF
4	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	us-gaap:MinimumMember (label)	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividends Per Share	0.28	iso4217:USD/shares	INF
5	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	us-gaap:MinimumMember (label)	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividends Per Share	0.31	iso4217:USD/shares	INF
6	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	us-gaap:MinimumMember (label)	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividends Per Share	0.36	iso4217:USD/shares	INF

Fact Table
Network	101150 - Disclosure - Stock Plan Activity (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureStockPlanActivityDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Restricted Stock [Member]	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Assumed Acquisition In Period	23000000	shares	-6
2	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Restricted Stock [Member]	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Assumed In Acquisitions Weighted Average Grant Date Fair Value	59.09	iso4217:USD/shares	2
3	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Restricted Stock [Member]	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period	20000000	shares	-6
4	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Restricted Stock [Member]	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value	43.71	iso4217:USD/shares	2
5	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Restricted Stock [Member]	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod (label)	84000000	shares	-6
6	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Restricted Stock [Member]	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue (label)	42.36	iso4217:USD/shares	2
7	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Restricted Stock [Member]	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue (label)	41.51	iso4217:USD/shares	2
8	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Restricted Stock [Member]	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue (label)	55.64	iso4217:USD/shares	2
9	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Restricted Stock [Member]	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber (label)	194000000	shares	-6
10	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Restricted Stock [Member]	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber (label)	201000000	shares	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Restricted Stock [Member]	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue (label)	36.92	iso4217:USD/shares	2
12	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Restricted Stock [Member]	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue (label)	46.32	iso4217:USD/shares	2
13	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Restricted Stock [Member]	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period	80000000	shares	-6
14	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Restricted Stock [Member]	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value	37.36	iso4217:USD/shares	2

Fact Table
Network	101160 - Disclosure - Stock Plan Activity (Parenthetical) (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureStockPlanActivityParentheticalDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Performance Shares [Member]	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod (label)	1000000	shares	-6
2	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Performance Shares [Member]	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod (label)	1000000	shares	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Performance Shares [Member]	us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod (label)	2000000	shares	-6

Fact Table
Network	101170 - Disclosure - Employee Purchased Shares (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureEmployeePurchasedSharesDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	101180 - Disclosure - Segment Revenue (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureSegmentRevenueDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Corporate And Reconciling Items [Member]	us-gaap:SalesRevenueNet (label)	0	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Corporate And Reconciling Items [Member]	us-gaap:SalesRevenueNet (label)	-6643000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Corporate And Reconciling Items [Member]	us-gaap:SalesRevenueNet (label)	-6707000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Operating Segments [Member]	us-gaap:SalesRevenueNet (label)	23715000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Intelligent Cloud [Member]	us-gaap:SalesRevenueNet (label)	23715000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Operating Segments [Member]	us-gaap:SalesRevenueNet (label)	25042000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Intelligent Cloud [Member]	us-gaap:SalesRevenueNet (label)	25042000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Operating Segments [Member]	us-gaap:SalesRevenueNet (label)	27440000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Intelligent Cloud [Member]	us-gaap:SalesRevenueNet (label)	27440000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Operating Segments [Member]	us-gaap:SalesRevenueNet (label)	43435000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	More Personal Computing [Member]	us-gaap:SalesRevenueNet (label)	43435000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Operating Segments [Member]	us-gaap:SalesRevenueNet (label)	40434000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	More Personal Computing [Member]	us-gaap:SalesRevenueNet (label)	40434000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Operating Segments [Member]	us-gaap:SalesRevenueNet (label)	38773000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	More Personal Computing [Member]	us-gaap:SalesRevenueNet (label)	38773000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Operating Segments [Member]	us-gaap:SalesRevenueNet (label)	26430000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Productivity And Business Processes [Member]	us-gaap:SalesRevenueNet (label)	26430000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Operating Segments [Member]	us-gaap:SalesRevenueNet (label)	26487000000	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Productivity And Business Processes [Member]	us-gaap:SalesRevenueNet (label)	26487000000	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Operating Segments [Member]	us-gaap:SalesRevenueNet (label)	30444000000	iso4217:USD	-6
21	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Productivity And Business Processes [Member]	us-gaap:SalesRevenueNet (label)	30444000000	iso4217:USD	-6

Fact Table
Network	101190 - Disclosure - Operating Income (Loss) by Segment (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureOperatingIncomeLossBySegmentDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Corporate And Reconciling Items [Member]	us-gaap:OperatingIncomeLoss (label)	-10011000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Corporate And Reconciling Items [Member]	us-gaap:OperatingIncomeLoss (label)	-7753000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Corporate And Reconciling Items [Member]	us-gaap:OperatingIncomeLoss (label)	-7013000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Corporate And Reconciling Items [Member]	us-gaap:OperatingIncomeLoss (label)	0	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Corporate And Reconciling Items [Member]	us-gaap:OperatingIncomeLoss (label)	-6643000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Corporate And Reconciling Items [Member]	us-gaap:OperatingIncomeLoss (label)	-6707000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Corporate And Reconciling Items [Member]	us-gaap:OperatingIncomeLoss (label)	-10011000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Corporate And Reconciling Items [Member]	us-gaap:OperatingIncomeLoss (label)	-1110000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Corporate And Reconciling Items [Member]	us-gaap:OperatingIncomeLoss (label)	-306000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Operating Segments [Member]	us-gaap:OperatingIncomeLoss (label)	9803000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Intelligent Cloud [Member]	us-gaap:OperatingIncomeLoss (label)	9803000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Operating Segments [Member]	us-gaap:OperatingIncomeLoss (label)	9315000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Intelligent Cloud [Member]	us-gaap:OperatingIncomeLoss (label)	9315000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Operating Segments [Member]	us-gaap:OperatingIncomeLoss (label)	9138000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Intelligent Cloud [Member]	us-gaap:OperatingIncomeLoss (label)	9138000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Operating Segments [Member]	us-gaap:OperatingIncomeLoss (label)	5095000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	More Personal Computing [Member]	us-gaap:OperatingIncomeLoss (label)	5095000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Operating Segments [Member]	us-gaap:OperatingIncomeLoss (label)	6202000000	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	More Personal Computing [Member]	us-gaap:OperatingIncomeLoss (label)	6202000000	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Operating Segments [Member]	us-gaap:OperatingIncomeLoss (label)	8288000000	iso4217:USD	-6
21	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	More Personal Computing [Member]	us-gaap:OperatingIncomeLoss (label)	8288000000	iso4217:USD	-6
22	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Operating Segments [Member]	us-gaap:OperatingIncomeLoss (label)	13274000000	iso4217:USD	-6
23	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Productivity And Business Processes [Member]	us-gaap:OperatingIncomeLoss (label)	13274000000	iso4217:USD	-6
24	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Operating Segments [Member]	us-gaap:OperatingIncomeLoss (label)	12418000000	iso4217:USD	-6
25	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Productivity And Business Processes [Member]	us-gaap:OperatingIncomeLoss (label)	12418000000	iso4217:USD	-6
26	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Operating Segments [Member]	us-gaap:OperatingIncomeLoss (label)	11913000000	iso4217:USD	-6
27	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Productivity And Business Processes [Member]	us-gaap:OperatingIncomeLoss (label)	11913000000	iso4217:USD	-6

Fact Table
Network	101200 - Disclosure - Corporate and Other Operating Income (Loss) Activity (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureCorporateAndOtherOperatingIncomeLossActivityDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Corporate And Reconciling Items [Member]	us-gaap:OperatingIncomeLoss (label)	-10011000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Corporate And Reconciling Items [Member]	us-gaap:OperatingIncomeLoss (label)	-7753000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Corporate And Reconciling Items [Member]	us-gaap:OperatingIncomeLoss (label)	-7013000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Corporate And Reconciling Items [Member]	us-gaap:OperatingIncomeLoss (label)	0	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	msft:WindowsTenDeferralMember (label)	us-gaap:OperatingIncomeLoss (label)	0	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Corporate And Reconciling Items [Member]	us-gaap:OperatingIncomeLoss (label)	-6643000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	msft:WindowsTenDeferralMember (label)	us-gaap:OperatingIncomeLoss (label)	-6643000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Corporate And Reconciling Items [Member]	us-gaap:OperatingIncomeLoss (label)	-6707000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	msft:WindowsTenDeferralMember (label)	us-gaap:OperatingIncomeLoss (label)	-6707000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Corporate And Reconciling Items [Member]	us-gaap:OperatingIncomeLoss (label)	-10011000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Impairment Integration And Restructuring Expenses [Member]	us-gaap:OperatingIncomeLoss (label)	-10011000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Corporate And Reconciling Items [Member]	us-gaap:OperatingIncomeLoss (label)	-1110000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Impairment Integration And Restructuring Expenses [Member]	us-gaap:OperatingIncomeLoss (label)	-1110000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Corporate And Reconciling Items [Member]	us-gaap:OperatingIncomeLoss (label)	-306000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Impairment Integration And Restructuring Expenses [Member]	us-gaap:OperatingIncomeLoss (label)	-306000000	iso4217:USD	-6

Fact Table
Network	101210 - Disclosure - Segment Information and Geographic Data - Additional Information (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureSegmentInformationAndGeographicDataAdditionalInformationDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	101220 - Disclosure - Revenue Classified by Major Geographic Areas (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureRevenueClassifiedByMajorGeographicAreasDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Segment Geographical [Domain]	us-gaap:SalesRevenueNet (label)	93580000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Segment Geographical [Domain]	us-gaap:SalesRevenueNet (label)	20379000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Segment Geographical [Domain]	us-gaap:SalesRevenueNet (label)	85320000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	Segment Geographical [Domain]	us-gaap:SalesRevenueNet (label)	23796000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	Segment Geographical [Domain]	us-gaap:SalesRevenueNet (label)	20531000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Segment Geographical [Domain]	us-gaap:SalesRevenueNet (label)	20614000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	Segment Geographical [Domain]	us-gaap:SalesRevenueNet (label)	20453000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Segment Geographical [Domain]	us-gaap:SalesRevenueNet (label)	89950000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	Segment Geographical [Domain]	us-gaap:SalesRevenueNet (label)	24090000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	Segment Geographical [Domain]	us-gaap:SalesRevenueNet (label)	22090000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Segment Geographical [Domain]	us-gaap:SalesRevenueNet (label)	23317000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	UNITED STATES	us-gaap:SalesRevenueNet (label)	42941000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	UNITED STATES	us-gaap:SalesRevenueNet (label)	40578000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	UNITED STATES	us-gaap:SalesRevenueNet (label)	45248000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Non Us [Member]	us-gaap:SalesRevenueNet (label)	50639000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Non Us [Member]	us-gaap:SalesRevenueNet (label)	44742000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Non Us [Member]	us-gaap:SalesRevenueNet (label)	44702000000	iso4217:USD	-6

Fact Table
Network	101230 - Disclosure - Revenue Classified by Significant Product and Service Offerings (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureRevenueClassifiedBySignificantProductAndServiceOfferingsDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Products And Services [Domain]	us-gaap:SalesRevenueNet (label)	93580000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Products And Services [Domain]	us-gaap:SalesRevenueNet (label)	20379000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Products And Services [Domain]	us-gaap:SalesRevenueNet (label)	85320000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	Products And Services [Domain]	us-gaap:SalesRevenueNet (label)	23796000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	Products And Services [Domain]	us-gaap:SalesRevenueNet (label)	20531000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Products And Services [Domain]	us-gaap:SalesRevenueNet (label)	20614000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	Products And Services [Domain]	us-gaap:SalesRevenueNet (label)	20453000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Products And Services [Domain]	us-gaap:SalesRevenueNet (label)	89950000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	Products And Services [Domain]	us-gaap:SalesRevenueNet (label)	24090000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	Products And Services [Domain]	us-gaap:SalesRevenueNet (label)	22090000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Products And Services [Domain]	us-gaap:SalesRevenueNet (label)	23317000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Advertising [Member]	us-gaap:SalesRevenueNet (label)	4557000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Advertising [Member]	us-gaap:SalesRevenueNet (label)	6098000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Advertising [Member]	us-gaap:SalesRevenueNet (label)	6971000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Consulting And Product Support Services [Member]	us-gaap:SalesRevenueNet (label)	5090000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Consulting And Product Support Services [Member]	us-gaap:SalesRevenueNet (label)	5641000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Consulting And Product Support Services [Member]	us-gaap:SalesRevenueNet (label)	5588000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Devices [Member]	us-gaap:SalesRevenueNet (label)	11602000000	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Devices [Member]	us-gaap:SalesRevenueNet (label)	7466000000	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Devices [Member]	us-gaap:SalesRevenueNet (label)	4557000000	iso4217:USD	-6
21	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	msft:LinkedInCorporationMember (label)	us-gaap:SalesRevenueNet (label)	0	iso4217:USD	-6
22	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	msft:LinkedInCorporationMember (label)	us-gaap:SalesRevenueNet (label)	0	iso4217:USD	-6
23	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	msft:LinkedInCorporationMember (label)	us-gaap:SalesRevenueNet (label)	2268000000	iso4217:USD	-6
24	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Microsoft Office System [Member]	us-gaap:SalesRevenueNet (label)	23538000000	iso4217:USD	-6
25	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Microsoft Office System [Member]	us-gaap:SalesRevenueNet (label)	23588000000	iso4217:USD	-6
26	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Microsoft Office System [Member]	us-gaap:SalesRevenueNet (label)	25389000000	iso4217:USD	-6
27	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Other Products And Services [Member]	us-gaap:SalesRevenueNet (label)	6234000000	iso4217:USD	-6
28	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Other Products And Services [Member]	us-gaap:SalesRevenueNet (label)	5851000000	iso4217:USD	-6
29	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Other Products And Services [Member]	us-gaap:SalesRevenueNet (label)	5538000000	iso4217:USD	-6
30	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Server Products And Tools [Member]	us-gaap:SalesRevenueNet (label)	18612000000	iso4217:USD	-6
31	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Server Products And Tools [Member]	us-gaap:SalesRevenueNet (label)	19177000000	iso4217:USD	-6
32	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Server Products And Tools [Member]	us-gaap:SalesRevenueNet (label)	21758000000	iso4217:USD	-6
33	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Windows Operating Systems For Computing Devices [Member]	us-gaap:SalesRevenueNet (label)	14826000000	iso4217:USD	-6
34	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Windows Operating Systems For Computing Devices [Member]	us-gaap:SalesRevenueNet (label)	8104000000	iso4217:USD	-6
35	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Windows Operating Systems For Computing Devices [Member]	us-gaap:SalesRevenueNet (label)	8625000000	iso4217:USD	-6
36	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Xbox [Member]	us-gaap:SalesRevenueNet (label)	9121000000	iso4217:USD	-6
37	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Xbox [Member]	us-gaap:SalesRevenueNet (label)	9395000000	iso4217:USD	-6
38	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Xbox [Member]	us-gaap:SalesRevenueNet (label)	9256000000	iso4217:USD	-6

Fact Table
Network	101240 - Disclosure - Revenue Classified by Significant Product and Service Offerings (Parenthetical) (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureRevenueClassifiedBySignificantProductAndServiceOfferingsParentheticalDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Products Or Services Name Secondary Categorization [Domain]	us-gaap:SalesRevenueNet (label)	93580000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Products Or Services Name Secondary Categorization [Domain]	us-gaap:SalesRevenueNet (label)	20379000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Products Or Services Name Secondary Categorization [Domain]	us-gaap:SalesRevenueNet (label)	85320000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	Products Or Services Name Secondary Categorization [Domain]	us-gaap:SalesRevenueNet (label)	23796000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	Products Or Services Name Secondary Categorization [Domain]	us-gaap:SalesRevenueNet (label)	20531000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Products Or Services Name Secondary Categorization [Domain]	us-gaap:SalesRevenueNet (label)	20614000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	Products Or Services Name Secondary Categorization [Domain]	us-gaap:SalesRevenueNet (label)	20453000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Products Or Services Name Secondary Categorization [Domain]	us-gaap:SalesRevenueNet (label)	89950000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	Products Or Services Name Secondary Categorization [Domain]	us-gaap:SalesRevenueNet (label)	24090000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	Products Or Services Name Secondary Categorization [Domain]	us-gaap:SalesRevenueNet (label)	22090000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Products Or Services Name Secondary Categorization [Domain]	us-gaap:SalesRevenueNet (label)	23317000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Commercial Cloud [Member]	us-gaap:SalesRevenueNet (label)	5800000000	iso4217:USD	-8
13	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Commercial Cloud [Member]	us-gaap:SalesRevenueNet (label)	9500000000	iso4217:USD	-8
14	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Commercial Cloud [Member]	us-gaap:SalesRevenueNet (label)	14900000000	iso4217:USD	-8

Fact Table
Network	101250 - Disclosure - Long-Lived Assets, Excluding Financial Instruments and Tax Assets, Classified by Location of Controlling Statutory Company (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureLongLivedAssetsExcludingFinancialInstrumentsAndTaxAssetsClassifiedByLocationOfControllingStatutoryCompanyDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2015-06-30	IRELAND	Noncurrent Assets	1595000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2016-06-30	IRELAND	Noncurrent Assets	2078000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2017-06-30	IRELAND	Noncurrent Assets	12876000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2015-06-30	LUXEMBOURG	Noncurrent Assets	6879000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-06-30	LUXEMBOURG	Noncurrent Assets	6854000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2017-06-30	LUXEMBOURG	Noncurrent Assets	6845000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2015-06-30	UNITED STATES	Noncurrent Assets	19562000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2016-06-30	UNITED STATES	Noncurrent Assets	22819000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2017-06-30	UNITED STATES	Noncurrent Assets	39118000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Other Countries [Member]	Noncurrent Assets	8469000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Countries [Member]	Noncurrent Assets	8210000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Countries [Member]	Noncurrent Assets	10123000000	iso4217:USD	-6

Fact Table
Network	101260 - Disclosure - Quarterly Information (Unaudited) (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureQuarterlyInformationUnauditedDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations

Fact Table
Network	101270 - Disclosure - Quarterly Information (Unaudited) (Parenthetical) (Detail) (http://www.microsoft.com/20170630/taxonomy/role/DisclosureQuarterlyInformationUnauditedParentheticalDetail)
Table	(implied)

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Phone Business [Member]	us-gaap:AssetImpairmentCharges (label)	630000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Employee Severance [Member]	Restructuring Charges	306000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Employee Severance [Member]	Restructuring Charges	306000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Sales And Marketing Restructuring Plan [Member]	Restructuring Charges	306000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Employee Severance [Member]	Restructuring Charges	306000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	msft:TwentySixteenRestructuringPlanMember (label)	Restructuring Charges	501000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	msft:TwentySixteenRestructuringPlanMember (label)	Restructuring Charges	480000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	msft:WindowsTenDeferralMember (label)	us-gaap:SalesRevenueNet (label)	1300000000	iso4217:USD	-8
9	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	msft:WindowsTenDeferralMember (label)	us-gaap:SalesRevenueNet (label)	6600000000	iso4217:USD	-8
10	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	msft:WindowsTenDeferralMember (label)	us-gaap:SalesRevenueNet (label)	1700000000	iso4217:USD	-8
11	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	msft:WindowsTenDeferralMember (label)	us-gaap:SalesRevenueNet (label)	1600000000	iso4217:USD	-8
12	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	msft:WindowsTenDeferralMember (label)	us-gaap:SalesRevenueNet (label)	2000000000	iso4217:USD	-8
13	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	msft:WindowsTenDeferralMember (label)	us-gaap:SalesRevenueNet (label)	1900000000	iso4217:USD	-8
14	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	msft:WindowsTenDeferralMember (label)	us-gaap:SalesRevenueNet (label)	6700000000	iso4217:USD	-8
15	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	msft:WindowsTenDeferralMember (label)	us-gaap:SalesRevenueNet (label)	2000000000	iso4217:USD	-8
16	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	msft:WindowsTenDeferralMember (label)	us-gaap:SalesRevenueNet (label)	1500000000	iso4217:USD	-8
17	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	msft:WindowsTenDeferralMember (label)	us-gaap:SalesRevenueNet (label)	1400000000	iso4217:USD	-8

Rules

Type	Defined	Bound	OK	Fail
formula	0	0	0	0
existenceAssertion	0	0	0	0
valueAssertion	0	0	0	0
calculation	212	1035	646	389

Rule Details

Errors and Warnings

Other than rule related. The error Type is just a conjecture on the culprit, because some 'bad reports' may contain some XBRL feature we have not yet covered.

Type	Where	What
bad_report	loadContext/C_0000789019_20160501_20160501	failed((simpleDate(2016-05-01),simpleDate(2016-05-01),2016-05-01@>2016-05-01))
bad_report	loadContext/C_0000789019_20170501_20170501	failed((simpleDate(2017-05-01),simpleDate(2017-05-01),2017-05-01@>2017-05-01))

For more information: http://logicalcontracts.com/xbrl-and-sbrm-reporting/
DISCLAIMER: this analysis is provided by software still under development, and likely incomplete or even erroneous; do NOT use it other than for experimental, inconsequential purposes

Report

User Alterations

Table of Contents

Terms

Model Structures

Fact Tables

Rules

Rule Details

Errors and Warnings