Report Analysis

Generated at 2020-10-07T14:26:44+0000 for Charles.Hoffman@me.com. This page will remain online for about 48 hours.

The Report

Submitted: http://xbrlsite.azurewebsites.net/2020/master/msft/testing/instance-MSFT.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

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

Terms

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

#	Label	Data Type	Period Type	Balance Type	Prefix	Documentation, Refs, Name
1	Accounts Receivable Net And Other Assets	xbrli:monetaryItemType	instant	debit	msft	Accounts receivable, net, and other assets. AccountsReceivableNetAndOtherAssets
2	Acquired Finite Lived Intangible Assets	xbrli:monetaryItemType	duration	debit	msft	The aggregate amount assigned to a major class of finite-lived intangible assets acquired either individually or as part of a group of assets (in either an asset acquisition or business combination). A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. AcquiredFiniteLivedIntangibleAssets
3	Acquisitions Net Of Cash Acquired And Purchases Of Intangible And Other Assets	xbrli:monetaryItemType	duration	credit	msft	The cash outflow associated with the acquisitions of businesses, net of the cash acquired from the purchases, and purchases of intangible and other assets. AcquisitionsNetOfCashAcquiredAndPurchasesOfIntangibleAndOtherAssets
4	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Short Term Debt	xbrli:monetaryItemType	instant	credit	msft	Business combination recognized identifiable assets acquired and liabilities assumed current liabilities short term debt. BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesShortTermDebt
5	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Other Liabilities Net	xbrli:monetaryItemType	instant	credit	msft	Amount of other liabilities expected to be realized or consumed after one year or the normal operating cycle, if longer, amount of other assets due after one year or the normal operating cycle, if longer, and fair value of non-controlling interest at the acquisition date. BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherLiabilitiesNet
6	Computer Hardware And Software	xbrli:monetaryItemType	instant	debit	msft	Computer hardware and software. ComputerHardwareAndSoftware
7	Cost Of Services And Other	xbrli:monetaryItemType	duration	debit	msft	Cost of Services and Other CostOfServicesAndOther
8	Deferred Revenue By Segment [Text Block]	nonnum:textBlockItemType	duration	null	msft	Table of deferred revenue by reportable segment. DeferredRevenueBySegmentTextBlock
9	Deferred Tax Assets Depreciation And Amortization	xbrli:monetaryItemType	instant	debit	msft	Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from depreciation and amortization. DeferredTaxAssetsDepreciationAndAmortization
10	Deferred Tax Liabilities Depreciation And Amortization	xbrli:monetaryItemType	instant	credit	msft	Amount of deferred tax liability attributable to taxable temporary differences from depreciation and amortization. DeferredTaxLiabilitiesDepreciationAndAmortization
11	Deferred Tax Liabilities Unrealized Gains Investments And Debt	xbrli:monetaryItemType	instant	credit	msft	Amount of deferred tax liability attributable to taxable temporary differences from unrealized gains on investments and debt. DeferredTaxLiabilitiesUnrealizedGainsInvestmentsAndDebt
12	Depreciation Amortization And Other	xbrli:monetaryItemType	duration	debit	msft	The aggregate net amount of depreciation, amortization, and accretion recognized during an accounting period, and other operating transactions that are not included elsewhere in the statement of cash flows. DepreciationAmortizationAndOther
13	Derivative Assets Net Amounts Presented In Balance Sheet	xbrli:monetaryItemType	instant	debit	msft	Fair value after effects of master netting arrangements, of a financial asset or other contract with one or more underlying, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes amounts elected not to be offset. DerivativeAssetsNetAmountsPresentedInBalanceSheet
14	Derivative Assets Potential Net Amounts Not Presented In Balance Sheet	xbrli:monetaryItemType	instant	debit	msft	Fair value after effects of master netting arrangements and after subtracting amounts that were eligible for offset but elected not to be offset or not offset because they did not meet the relevant accounting guidance, of a financial asset or other contract with one or more underlying, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. DerivativeAssetsPotentialNetAmountsNotPresentedInBalanceSheet
15	Derivative Fair Value Of Derivative Asset Amount Not Offset	xbrli:monetaryItemType	instant	debit	msft	Fair value of financial asset or other contract with one or more underlying, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be offset under a master netting arrangement or not offset because it does not meet the relevant accounting guidance. DerivativeFairValueOfDerivativeAssetAmountNotOffset
16	Derivative Fair Value Of Derivative Liability Amount Not Offset	xbrli:monetaryItemType	instant	credit	msft	Fair value of financial liability or other contract with one or more underlying, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be offset under a master netting arrangement or not offset because it does not meet the relevant accounting guidance. DerivativeFairValueOfDerivativeLiabilityAmountNotOffset
17	Derivative Liabilities Net Amounts Presented In Balance Sheet	xbrli:monetaryItemType	instant	credit	msft	Fair value after effects of master netting arrangements, of a financial liability or other contract with one or more underlying, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of a liability. Includes amounts elected not to be offset. DerivativeLiabilitiesNetAmountsPresentedInBalanceSheet
18	Derivative Liabilities Potential Net Amounts Not Presented In Balance Sheet	xbrli:monetaryItemType	instant	credit	msft	Fair value after effects of master netting arrangements and after subtracting amounts that were eligible for offset but elected not to be offset or not offset because they did not meet the relevant accounting guidance, of a financial liability or other contract with one or more underlying, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. DerivativeLiabilitiesPotentialNetAmountsNotPresentedInBalanceSheet
19	Effective Income Tax Rate Reconciliation Deductions Excess Tax Benefits Stock Based Compensation	num:percentItemType	duration	null	msft	Effective income tax rate reconciliation deductions excess tax benefits stock based compensation. EffectiveIncomeTaxRateReconciliationDeductionsExcessTaxBenefitsStockBasedCompensation
20	Effective Income Tax Rate Reconciliation Interest Income Expense	num:percentItemType	duration	null	msft	Effective income tax rate reconciliation interest income (expense). EffectiveIncomeTaxRateReconciliationInterestIncomeExpense
21	Effective Income Tax Rate Reconciliation Phone Business Gains Losses	num:percentItemType	duration	null	msft	Effective income tax rate reconciliation phone business gains (losses). EffectiveIncomeTaxRateReconciliationPhoneBusinessGainsLosses
22	Financial Instrument Covenant Minimum Liquidity	xbrli:monetaryItemType	instant	debit	msft	The minimum liquidity for the period as required by certain of our counterparty agreements for derivative instruments. FinancialInstrumentCovenantMinimumLiquidity
23	Financial Instrument Covenant Minimum Liquidity Requirement	xbrli:monetaryItemType	duration	debit	msft	The minimum liquidity required by certain of our counterparty agreements for derivative instruments. FinancialInstrumentCovenantMinimumLiquidityRequirement
24	Foreign Earnings Taxed At Rates Lower Than Us Rate	num:percentItemType	duration	null	msft	Foreign Earnings Taxed at Rates Lower Than US Rate ForeignEarningsTaxedAtRatesLowerThanUsRate
25	Gain Loss On Cash Flow Hedge Effectiveness Net [Abstract]	xbrli:stringItemType	duration	null	msft	Gain Loss on Cash Flow Hedge Effectiveness Net [Abstract] GainLossOnCashFlowHedgeEffectivenessNetAbstract
26	Gain Loss On Investments And Derivative Instruments	xbrli:monetaryItemType	duration	credit	msft	Represents losses (gains) included in earnings for the period as a result of selling or holding securities and derivatives. GainLossOnInvestmentsAndDerivativeInstruments
27	Impairment Integration And Restructuring Effect On Earnings After Tax	xbrli:monetaryItemType	duration	credit	msft	Impairment, integration and restructuring effect on earnings after tax. ImpairmentIntegrationAndRestructuringEffectOnEarningsAfterTax
28	Impairment Integration And Restructuring Effect On Earnings Per Share After Tax	num:perShareItemType	duration	null	msft	Impairment, integration and restructuring effect on earnings per share after tax. ImpairmentIntegrationAndRestructuringEffectOnEarningsPerShareAfterTax
29	Impairment Integration And Restructuring Effect On Operating Income Loss After Tax	xbrli:monetaryItemType	duration	credit	msft	Impairment, integration and restructuring effect on operating income (loss) after tax. ImpairmentIntegrationAndRestructuringEffectOnOperatingIncomeLossAfterTax
30	Impairment Integration And Restructuring Expenses	xbrli:monetaryItemType	duration	debit	msft	Impairment, integration and restructuring expenses. ImpairmentIntegrationAndRestructuringExpenses
31	Operating Lease Liabilities	xbrli:monetaryItemType	instant	credit	msft	Operating lease liabilities. OperatingLeaseLiabilities
32	Operating Lease Right Of Use Assets	xbrli:monetaryItemType	instant	debit	msft	Operating lease right-of-use assets. OperatingLeaseRightOfUseAssets
33	Product Revenue And Service And Other Revenue Policy [Text Block]	nonnum:textBlockItemType	duration	null	msft	Describes product revenue and service and other revenue. ProductRevenueAndServiceAndOtherRevenuePolicyTextBlock
34	Reconciliation Of Assets Measured At Fair Value On Recurring Basis To Balance Sheet Presentation Table [Text Block]	nonnum:textBlockItemType	duration	null	msft	Reconciliation of the net fair value of assets measured at fair value on a recurring basis to their balance sheet presentation. ReconciliationOfAssetsMeasuredAtFairValueOnRecurringBasisToBalanceSheetPresentationTableTextBlock
35	Revenue And Operating Loss Attributable To Acquiree Since Acquisition Date Table [Text Block]	nonnum:textBlockItemType	duration	null	msft	Revenue and operating loss attributable to acquiree since acquisition date. RevenueAndOperatingLossAttributableToAcquireeSinceAcquisitionDateTableTextBlock
36	Revenue Recognition Period	xbrli:durationItemType	duration	null	msft	Revenue Recognition, Period RevenueRecognitionPeriod
37	Sales Revenue Services And Other Net	xbrli:monetaryItemType	duration	credit	msft	Sales Revenue Services and Other Net SalesRevenueServicesAndOtherNet
38	Schedule Of Cash Cash Equivalents And Investments Table [Text Block]	nonnum:textBlockItemType	duration	null	msft	The schedule of cash, cash equivalents, and debt and equity securities, including any unrealized or realized gain (loss). ScheduleOfCashCashEquivalentsAndInvestmentsTableTextBlock
39	Selling And Marketing Policy [Text Block]	nonnum:textBlockItemType	duration	null	msft	Describes the entity"s policies for sales and marketing expenses, which include payroll and related costs for sales and marketing personnel and costs of advertising (such as promotions, tradeshows and seminars). SellingAndMarketingPolicyTextBlock
40	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Assumed Acquisition In Period	xbrli:sharesItemType	duration	null	msft	Share based compensation arrangement by share based payment award equity instruments other than options assumed acquisition in period. ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAssumedAcquisitionInPeriod
41	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	null	msft	Share based compensation arrangement by share based payment award equity instruments other than options assumed in acquisitions weighted average grant date fair value. ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAssumedInAcquisitionsWeightedAverageGrantDateFairValue
42	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividends Per Share	num:perShareItemType	duration	null	msft	Share Based Compensation Arrangement By Share Based Payment Award, Fair Value Assumptions, Expected Dividends Per Share ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendsPerShare
43	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Method Used Table [Text Block]	nonnum:textBlockItemType	duration	null	msft	Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock awards. ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMethodUsedTableTextBlock
44	Share Repurchase Program Disclosure Table [Text Block]	nonnum:textBlockItemType	duration	null	msft	Tabular disclosure of the company"s share repurchase activity. ShareRepurchaseProgramDisclosureTableTextBlock
45	Stock Issued Employee Stock Purchase Plan Average Price Per Share	num:perShareItemType	duration	null	msft	The average price per share of stock purchased by employees under the Employee Stock Purchase Plan during the period. StockIssuedEmployeeStockPurchasePlanAveragePricePerShare
46	Valuation Allowances And Reserves Charged To Costs And Other	xbrli:monetaryItemType	duration	credit	msft	Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, charged to costs and expenses, as well as other adjustments to the reserves that are not charged to costs and expenses. ValuationAllowancesAndReservesChargedToCostsAndOther
47	Accounts Receivable Net Current	xbrli:monetaryItemType	instant	debit	base	AccountsReceivableNetCurrent
48	Accounts Payable Current	xbrli:monetaryItemType	instant	credit	base	AccountsPayableCurrent
49	Accrued Income Taxes Current	xbrli:monetaryItemType	instant	credit	base	AccruedIncomeTaxesCurrent
50	Accrued Income Taxes Noncurrent	xbrli:monetaryItemType	instant	credit	base	AccruedIncomeTaxesNoncurrent
51	Accumulated Other Comprehensive Income Loss Net Of Tax	xbrli:monetaryItemType	instant	credit	base	AccumulatedOtherComprehensiveIncomeLossNetOfTax
52	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment	xbrli:monetaryItemType	instant	credit	base	AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
53	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	xbrli:durationItemType	duration	null	base	AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
54	Adjustment To Additional Paid In Capital Income Tax Effect From Share Based Compensation Net	xbrli:monetaryItemType	duration	credit	base	AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet
55	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value	xbrli:monetaryItemType	duration	credit	base	AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
56	Advertising Expense	xbrli:monetaryItemType	duration	debit	base	AdvertisingExpense
57	Allocated Share Based Compensation Expense	xbrli:monetaryItemType	duration	debit	base	AllocatedShareBasedCompensationExpense
58	Allowance For Doubtful Accounts Receivable Current	xbrli:monetaryItemType	instant	credit	base	AllowanceForDoubtfulAccountsReceivableCurrent
59	Amortization Of Intangible Assets	xbrli:monetaryItemType	duration	debit	base	AmortizationOfIntangibleAssets
60	Asset Impairment Charges	xbrli:monetaryItemType	duration	debit	base	AssetImpairmentCharges
61	Assets Fair Value Disclosure Recurring	xbrli:monetaryItemType	instant	debit	base	AssetsFairValueDisclosureRecurring
62	Assets	xbrli:monetaryItemType	instant	debit	base	Assets
63	Assets Current	xbrli:monetaryItemType	instant	debit	base	AssetsCurrent
64	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss	xbrli:monetaryItemType	instant	debit	base	AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
65	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss	xbrli:monetaryItemType	instant	debit	base	AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
66	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss	xbrli:monetaryItemType	instant	debit	base	AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss
67	Available For Sale Securities Debt Maturities Rolling After Year Ten Amortized Cost Basis	xbrli:monetaryItemType	instant	debit	base	AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis
68	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Amortized Cost Basis	xbrli:monetaryItemType	instant	debit	base	AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis
69	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	xbrli:monetaryItemType	instant	credit	base	AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
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259	Increase Decrease In Other Noncurrent Liabilities	xbrli:monetaryItemType	duration	debit	base	IncreaseDecreaseInOtherNoncurrentLiabilities
260	Increase Decrease In Accounts Receivable	xbrli:monetaryItemType	duration	credit	base	IncreaseDecreaseInAccountsReceivable
261	Increase Decrease In Other Noncurrent Assets	xbrli:monetaryItemType	duration	credit	base	IncreaseDecreaseInOtherNoncurrentAssets
262	Increase Decrease In Other Current Liabilities	xbrli:monetaryItemType	duration	debit	base	IncreaseDecreaseInOtherCurrentLiabilities
263	Increase Decrease In Accounts Payable	xbrli:monetaryItemType	duration	debit	base	IncreaseDecreaseInAccountsPayable
264	Increase Decrease In Deferred Revenue	xbrli:monetaryItemType	duration	debit	base	IncreaseDecreaseInDeferredRevenue
265	Increase Decrease In Inventories	xbrli:monetaryItemType	duration	credit	base	IncreaseDecreaseInInventories
266	Incremental Common Shares Attributable To Share Based Payment Arrangements	xbrli:sharesItemType	duration	null	base	IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
267	Intangible Assets Finite Lived Policy	nonnum:textBlockItemType	duration	null	base	IntangibleAssetsFiniteLivedPolicy
268	Intangible Assets Disclosure [Text Block]	nonnum:textBlockItemType	duration	null	base	IntangibleAssetsDisclosureTextBlock
269	Interest Expense	xbrli:monetaryItemType	duration	debit	base	InterestExpense
270	Interest Paid	xbrli:monetaryItemType	duration	credit	base	InterestPaid
271	Inventory Disclosure [Text Block]	nonnum:textBlockItemType	duration	null	base	InventoryDisclosureTextBlock
272	Inventory Finished Goods Net Of Reserves	xbrli:monetaryItemType	instant	debit	base	InventoryFinishedGoodsNetOfReserves
273	Inventory Net	xbrli:monetaryItemType	instant	debit	base	InventoryNet
274	Inventory Work In Process Net Of Reserves	xbrli:monetaryItemType	instant	debit	base	InventoryWorkInProcessNetOfReserves
275	Inventory Raw Materials Net Of Reserves	xbrli:monetaryItemType	instant	debit	base	InventoryRawMaterialsNetOfReserves
276	Inventory Policy [Text Block]	nonnum:textBlockItemType	duration	null	base	InventoryPolicyTextBlock
277	Investment Income Net	xbrli:monetaryItemType	duration	credit	base	InvestmentIncomeNet
278	Investment Policy [Text Block]	nonnum:textBlockItemType	duration	null	base	InvestmentPolicyTextBlock
279	Investments Classified By Contractual Maturity Date Table [Text Block]	nonnum:textBlockItemType	duration	null	base	InvestmentsClassifiedByContractualMaturityDateTableTextBlock
280	Investments In Debt And Equity Instruments Cash And Cash Equivalents Unrealized And Realized Gains Losses [Text Block]	nonnum:textBlockItemType	duration	null	base	InvestmentsInDebtAndEquityInstrumentsCashAndCashEquivalentsUnrealizedAndRealizedGainsLossesTextBlock
281	Land	xbrli:monetaryItemType	instant	debit	base	Land
282	Lease And Rental Expense	xbrli:monetaryItemType	duration	debit	base	LeaseAndRentalExpense
283	Leasehold Improvements Gross	xbrli:monetaryItemType	instant	debit	base	LeaseholdImprovementsGross
284	Legal Matters And Contingencies [Text Block]	nonnum:textBlockItemType	duration	null	base	LegalMattersAndContingenciesTextBlock
285	Liabilities And Stockholders Equity	xbrli:monetaryItemType	instant	credit	base	LiabilitiesAndStockholdersEquity
286	Liabilities Fair Value Disclosure Recurring	xbrli:monetaryItemType	instant	credit	base	LiabilitiesFairValueDisclosureRecurring
287	Liabilities	xbrli:monetaryItemType	instant	credit	base	Liabilities
288	Liabilities Current	xbrli:monetaryItemType	instant	credit	base	LiabilitiesCurrent
289	Line Of Credit Facility Covenant Compliance	xbrli:stringItemType	duration	null	base	LineOfCreditFacilityCovenantCompliance
290	Line Of Credit Facility Expiration Date1	xbrli:dateItemType	duration	null	base	LineOfCreditFacilityExpirationDate1
291	Line Of Credit Facility Maximum Borrowing Capacity	xbrli:monetaryItemType	instant	credit	base	LineOfCreditFacilityMaximumBorrowingCapacity
292	Long Term Debt Fair Value	xbrli:monetaryItemType	instant	credit	base	LongTermDebtFairValue
293	Long Term Debt	xbrli:monetaryItemType	instant	credit	base	LongTermDebt
294	Long Term Debt Maturities Repayments Of Principal In Year Five	xbrli:monetaryItemType	instant	credit	base	LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
295	Long Term Debt Maturities Repayments Of Principal In Year Four	xbrli:monetaryItemType	instant	credit	base	LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
296	Long Term Debt Maturities Repayments Of Principal In Year Three	xbrli:monetaryItemType	instant	credit	base	LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
297	Long Term Debt Current	xbrli:monetaryItemType	instant	credit	base	LongTermDebtCurrent
298	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months	xbrli:monetaryItemType	instant	credit	base	LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
299	Long Term Investments	xbrli:monetaryItemType	instant	debit	base	LongTermInvestments
300	Long Term Debt Noncurrent	xbrli:monetaryItemType	instant	credit	base	LongTermDebtNoncurrent
301	Long Term Debt Maturities Repayments Of Principal In Year Two	xbrli:monetaryItemType	instant	credit	base	LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
302	Long Term Debt Maturities Repayments Of Principal After Year Five	xbrli:monetaryItemType	instant	credit	base	LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
303	Loss Contingency Accrual Carrying Value Current	xbrli:monetaryItemType	instant	credit	base	LossContingencyAccrualCarryingValueCurrent
304	Loss Contingency Range Of Possible Loss Portion Not Accrued	xbrli:monetaryItemType	instant	debit	base	LossContingencyRangeOfPossibleLossPortionNotAccrued
305	Mergers Acquisitions And Dispositions Disclosures [Text Block]	nonnum:textBlockItemType	duration	null	base	MergersAcquisitionsAndDispositionsDisclosuresTextBlock
306	Marketable Securities Realized Gain Loss Other Than Temporary Impairments Amount	xbrli:monetaryItemType	duration	debit	base	MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount
307	Maximum Length Of Time Foreign Currency Cash Flow Hedge	xbrli:durationItemType	duration	null	base	MaximumLengthOfTimeForeignCurrencyCashFlowHedge
308	Noncurrent Assets	xbrli:monetaryItemType	instant	debit	base	NoncurrentAssets
309	Net Cash Provided By Used In Financing Activities Continuing Operations	xbrli:monetaryItemType	duration	debit	base	NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
310	Net Cash Provided By Used In Investing Activities Continuing Operations	xbrli:monetaryItemType	duration	debit	base	NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
311	Net Cash Provided By Used In Operating Activities Continuing Operations	xbrli:monetaryItemType	duration	null	base	NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
312	Net Income Loss	xbrli:monetaryItemType	duration	credit	base	NetIncomeLoss
313	New Accounting Pronouncements Policy Policy [Text Block]	nonnum:textBlockItemType	duration	null	base	NewAccountingPronouncementsPolicyPolicyTextBlock
314	Nonoperating Income Expense	xbrli:monetaryItemType	duration	credit	base	NonoperatingIncomeExpense
315	Oci Before Reclassifications Net Of Tax Attributable To Parent	xbrli:monetaryItemType	duration	credit	base	OciBeforeReclassificationsNetOfTaxAttributableToParent
316	Open Tax Year	xbrli:gYearItemType	duration	null	base	OpenTaxYear
317	Operating Leases Future Minimum Payments Due Thereafter	xbrli:monetaryItemType	instant	credit	base	OperatingLeasesFutureMinimumPaymentsDueThereafter
318	Operating Leases Future Minimum Payments Due In Two Years	xbrli:monetaryItemType	instant	credit	base	OperatingLeasesFutureMinimumPaymentsDueInTwoYears
319	Operating Lease Right Of Use Asset	xbrli:monetaryItemType	instant	debit	base	OperatingLeaseRightOfUseAsset
320	Operating Leases Future Minimum Payments Due	xbrli:monetaryItemType	instant	credit	base	OperatingLeasesFutureMinimumPaymentsDue
321	Operating Leases Future Minimum Payments Due Current	xbrli:monetaryItemType	instant	credit	base	OperatingLeasesFutureMinimumPaymentsDueCurrent
322	Operating Leases Future Minimum Payments Due In Five Years	xbrli:monetaryItemType	instant	credit	base	OperatingLeasesFutureMinimumPaymentsDueInFiveYears
323	Operating Leases Future Minimum Payments Due In Four Years	xbrli:monetaryItemType	instant	credit	base	OperatingLeasesFutureMinimumPaymentsDueInFourYears
324	Operating Income Loss	xbrli:monetaryItemType	duration	credit	base	OperatingIncomeLoss
325	Operating Leases Future Minimum Payments Due In Three Years	xbrli:monetaryItemType	instant	credit	base	OperatingLeasesFutureMinimumPaymentsDueInThreeYears
326	Operating Lease Liability	xbrli:monetaryItemType	instant	credit	base	OperatingLeaseLiability
327	Operating Loss Carryforwards	xbrli:monetaryItemType	instant	debit	base	OperatingLossCarryforwards
328	Other Nonoperating Income And Expense [Text Block]	nonnum:textBlockItemType	duration	null	base	OtherNonoperatingIncomeAndExpenseTextBlock
329	Other Comprehensive Income Loss Before Reclassifications Tax	xbrli:monetaryItemType	duration	debit	base	OtherComprehensiveIncomeLossBeforeReclassificationsTax
330	Other Comprehensive Income Loss Tax Portion Attributable To Parent1	xbrli:monetaryItemType	duration	debit	base	OtherComprehensiveIncomeLossTaxPortionAttributableToParent1
331	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax	xbrli:monetaryItemType	duration	credit	base	OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax
332	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax	xbrli:monetaryItemType	duration	debit	base	OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax
333	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax	xbrli:monetaryItemType	duration	credit	base	OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
334	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax	xbrli:monetaryItemType	duration	debit	base	OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax
335	Other Comprehensive Income Loss Available For Sale Securities Tax	xbrli:monetaryItemType	duration	debit	base	OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax
336	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax	xbrli:monetaryItemType	duration	credit	base	OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
337	Other Assets Noncurrent	xbrli:monetaryItemType	instant	debit	base	OtherAssetsNoncurrent
338	Other Assets Fair Value Disclosure	xbrli:monetaryItemType	instant	debit	base	OtherAssetsFairValueDisclosure
339	Other Assets	xbrli:monetaryItemType	instant	debit	base	OtherAssets
340	Other Assets Current	xbrli:monetaryItemType	instant	debit	base	OtherAssetsCurrent
341	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax	xbrli:monetaryItemType	duration	credit	base	OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax
342	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax	xbrli:monetaryItemType	duration	debit	base	OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax
343	Other Liabilities	xbrli:monetaryItemType	instant	credit	base	OtherLiabilities
344	Other Liabilities Noncurrent	xbrli:monetaryItemType	instant	credit	base	OtherLiabilitiesNoncurrent
345	Other Liabilities Current	xbrli:monetaryItemType	instant	credit	base	OtherLiabilitiesCurrent
346	Other Nonoperating Income Expense	xbrli:monetaryItemType	duration	credit	base	OtherNonoperatingIncomeExpense
347	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent	xbrli:monetaryItemType	duration	credit	base	OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
348	Payments Of Dividends Common Stock	xbrli:monetaryItemType	duration	credit	base	PaymentsOfDividendsCommonStock
349	Payments For Restructuring	xbrli:monetaryItemType	duration	credit	base	PaymentsForRestructuring
350	Payments For Repurchase Of Common Stock	xbrli:monetaryItemType	duration	credit	base	PaymentsForRepurchaseOfCommonStock
351	Payments To Acquire Businesses Gross	xbrli:monetaryItemType	duration	credit	base	PaymentsToAcquireBusinessesGross
352	Payments To Acquire Investments	xbrli:monetaryItemType	duration	credit	base	PaymentsToAcquireInvestments
353	Payments To Acquire Property Plant And Equipment	xbrli:monetaryItemType	duration	credit	base	PaymentsToAcquirePropertyPlantAndEquipment
354	Proceeds From Debt Maturing In More Than Three Months	xbrli:monetaryItemType	duration	debit	base	ProceedsFromDebtMaturingInMoreThanThreeMonths
355	Proceeds From Payments For Other Financing Activities	xbrli:monetaryItemType	duration	debit	base	ProceedsFromPaymentsForOtherFinancingActivities
356	Proceeds From Repayments Of Short Term Debt Maturing In Three Months Or Less	xbrli:monetaryItemType	duration	debit	base	ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess
357	Proceeds From Issuance Of Common Stock	xbrli:monetaryItemType	duration	debit	base	ProceedsFromIssuanceOfCommonStock
358	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities	xbrli:monetaryItemType	duration	debit	base	ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities
359	Proceeds From Lines Of Credit	xbrli:monetaryItemType	duration	debit	base	ProceedsFromLinesOfCredit
360	Proceeds From Sale Of Available For Sale Securities	xbrli:monetaryItemType	duration	debit	base	ProceedsFromSaleOfAvailableForSaleSecurities
361	Property Plant And Equipment Policy [Text Block]	nonnum:textBlockItemType	duration	null	base	PropertyPlantAndEquipmentPolicyTextBlock
362	Property Plant And Equipment [Text Block]	nonnum:textBlockItemType	duration	null	base	PropertyPlantAndEquipmentTextBlock
363	Property Plant And Equipment Net	xbrli:monetaryItemType	instant	debit	base	PropertyPlantAndEquipmentNet
364	Property Plant And Equipment Gross	xbrli:monetaryItemType	instant	debit	base	PropertyPlantAndEquipmentGross
365	Property Plant And Equipment Disclosure [Text Block]	nonnum:textBlockItemType	duration	null	base	PropertyPlantAndEquipmentDisclosureTextBlock
366	Property Plant And Equipment Useful Life	xbrli:durationItemType	duration	null	base	PropertyPlantAndEquipmentUsefulLife
367	Quarterly Financial Information [Text Block]	nonnum:textBlockItemType	duration	null	base	QuarterlyFinancialInformationTextBlock
368	Realized Gain Loss On Investments Table [Text Block]	nonnum:textBlockItemType	duration	null	base	RealizedGainLossOnInvestmentsTableTextBlock
369	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent	xbrli:monetaryItemType	duration	debit	base	ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent
370	Reclassification From Aoci Current Period Tax	xbrli:monetaryItemType	duration	credit	base	ReclassificationFromAociCurrentPeriodTax
371	Reclassification From Aoci Current Period Before Tax Attributable To Parent	xbrli:monetaryItemType	duration	debit	base	ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent
372	Recognition Of Deferred Revenue	xbrli:monetaryItemType	duration	credit	base	RecognitionOfDeferredRevenue
373	Reconciliation Of Operating Profit Loss From Segments To Consolidated [Text Block]	nonnum:textBlockItemType	duration	null	base	ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTextBlock
374	Reconciliation Of Revenue From Segments To Consolidated [Text Block]	nonnum:textBlockItemType	duration	null	base	ReconciliationOfRevenueFromSegmentsToConsolidatedTextBlock
375	Repayments Of Debt Maturing In More Than Three Months	xbrli:monetaryItemType	duration	credit	base	RepaymentsOfDebtMaturingInMoreThanThreeMonths
376	Research Development And Computer Software Policy [Text Block]	nonnum:textBlockItemType	duration	null	base	ResearchDevelopmentAndComputerSoftwarePolicyTextBlock
377	Research And Development Expense	xbrli:monetaryItemType	duration	debit	base	ResearchAndDevelopmentExpense
378	Restructuring Reserve Settled Without Cash2	xbrli:monetaryItemType	duration	debit	base	RestructuringReserveSettledWithoutCash2
379	Restructuring And Related Cost Number Of Positions Eliminated	xbrli:integerItemType	duration	null	base	RestructuringAndRelatedCostNumberOfPositionsEliminated
380	Restructuring Charges	xbrli:monetaryItemType	duration	debit	base	RestructuringCharges
381	Restructuring Reserve Accrual Adjustment1	xbrli:monetaryItemType	duration	debit	base	RestructuringReserveAccrualAdjustment1
382	Restructuring And Related Activities Disclosure [Text Block]	nonnum:textBlockItemType	duration	null	base	RestructuringAndRelatedActivitiesDisclosureTextBlock
383	Restructuring Reserve	xbrli:monetaryItemType	instant	credit	base	RestructuringReserve
384	Restructuring And Related Activities Completion Date	xbrli:dateItemType	duration	null	base	RestructuringAndRelatedActivitiesCompletionDate
385	Retained Earnings Accumulated Deficit	xbrli:monetaryItemType	instant	credit	base	RetainedEarningsAccumulatedDeficit
386	Revenue Recognition Policy [Text Block]	nonnum:textBlockItemType	duration	null	base	RevenueRecognitionPolicyTextBlock
387	Sharebased Compensation Arrangement By Sharebased Payment Award Purchase Price Of Common Stock Percent	num:percentItemType	duration	null	base	SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent
388	Scheduleof Finite Lived Intangible Assets Future Amortization Expense Table [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock
389	Sales Revenue Goods Net	xbrli:monetaryItemType	duration	credit	base	SalesRevenueGoodsNet
390	Sales Revenue Net	xbrli:monetaryItemType	duration	credit	base	SalesRevenueNet
391	Schedule Of Deferred Tax Assets And Liabilities Table [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock
392	Schedule Of Earnings Per Share Basic And Diluted Table [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock
393	Schedule Of Share Based Compensation Employee Stock Purchase Plan Activity Table [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfShareBasedCompensationEmployeeStockPurchasePlanActivityTableTextBlock
394	Schedule Of Credit Losses For Financing Receivables Current Table [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfCreditLossesForFinancingReceivablesCurrentTableTextBlock
395	Schedule Of Effective Income Tax Rate Reconciliation Table [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock
396	Schedule Of Unrealized Loss On Investments Table [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock
397	Schedule Of Inventory Current Table [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfInventoryCurrentTableTextBlock
398	Schedule Of Fair Value Assets And Liabilities Measured On Recurring Basis Table [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock
399	Schedule Of Compensation Cost For Share Based Payment Arrangements Allocation Of Share Based Compensation Costs By Plan Table [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock
400	Schedule Of Maturities Of Long Term Debt Table [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfMaturitiesOfLongTermDebtTableTextBlock
401	Schedule Of Finite Lived Intangible Assets Table [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock
402	Schedule Of Future Minimum Rental Payments For Operating Leases Table [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock
403	Schedule Of Quarterly Financial Information Table [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfQuarterlyFinancialInformationTableTextBlock
404	Schedule Of Other Nonoperating Income Expense Table [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfOtherNonoperatingIncomeExpenseTableTextBlock
405	Schedule Of Components Of Income Tax Expense Benefit Table [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock
406	Schedule Of Income Before Income Tax Domestic And Foreign Table [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfIncomeBeforeIncomeTaxDomesticAndForeignTableTextBlock
407	Schedule Of Future Minimum Lease Payments For Capital Leases Table [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfFutureMinimumLeasePaymentsForCapitalLeasesTableTextBlock
408	Schedule Of Common Stock Outstanding Roll Forward Table [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfCommonStockOutstandingRollForwardTableTextBlock
409	Schedule Of Business Acquisitions By Acquisition [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock
410	Schedule Of Debt Instruments [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfDebtInstrumentsTextBlock
411	Schedule Of Acquired Finite Lived Intangible Assets By Major Class [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfAcquiredFiniteLivedIntangibleAssetsByMajorClassTextBlock
412	Schedule Of Accumulated Other Comprehensive Income Loss Table [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock
413	Schedule Of Entity Wide Disclosure On Geographic Areas Long Lived Assets In Individual Foreign Countries By Country [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfEntityWideDisclosureOnGeographicAreasLongLivedAssetsInIndividualForeignCountriesByCountryTextBlock
414	Schedule Of Entity Wide Information Revenue From External Customers By Products And Services [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock
415	Schedule Of Goodwill [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfGoodwillTextBlock
416	Schedule Of New Accounting Pronouncements And Changes In Accounting Principles [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfNewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock
417	Schedule Of Restructuring Reserve By Type Of Cost [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfRestructuringReserveByTypeOfCostTextBlock
418	Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfRevenueFromExternalCustomersAttributedToForeignCountriesByGeographicAreaTextBlock
419	Schedule Of Derivative Instruments Gain Loss In Statement Of Financial Performance [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock
420	Schedule Of Derivative Instruments In Statement Of Financial Position Fair Value [Text Block]	nonnum:textBlockItemType	duration	null	base	ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock
421	Securities Loaned	xbrli:monetaryItemType	instant	credit	base	SecuritiesLoaned
422	Securities Received As Collateral	xbrli:monetaryItemType	instant	debit	base	SecuritiesReceivedAsCollateral
423	Segment Reporting Disclosure Of Major Customers	xbrli:stringItemType	duration	null	base	SegmentReportingDisclosureOfMajorCustomers
424	Segment Reporting Disclosure [Text Block]	nonnum:textBlockItemType	duration	null	base	SegmentReportingDisclosureTextBlock
425	Segment Reporting Policy Policy [Text Block]	nonnum:textBlockItemType	duration	null	base	SegmentReportingPolicyPolicyTextBlock
426	Selling And Marketing Expense	xbrli:monetaryItemType	duration	debit	base	SellingAndMarketingExpense
427	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value	num:perShareItemType	duration	null	base	ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
428	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Maximum	num:percentItemType	duration	null	base	ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum
429	Share Based Compensation	xbrli:monetaryItemType	duration	debit	base	ShareBasedCompensation
430	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1	xbrli:durationItemType	duration	null	base	ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
431	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period	xbrli:sharesItemType	duration	null	base	ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
432	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Minimum	num:percentItemType	duration	null	base	ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum
433	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value	xbrli:monetaryItemType	duration	debit	base	ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
434	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period	xbrli:sharesItemType	duration	null	base	ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
435	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value	num:perShareItemType	duration	null	base	ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
436	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period	xbrli:sharesItemType	duration	null	base	ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
437	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value	num:perShareItemType	instant	null	base	ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
438	Share Based Compensation Arrangement By Share Based Payment Award Maximum Employee Subscription Rate	num:percentItemType	instant	null	base	ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate
439	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value	num:perShareItemType	duration	null	base	ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
440	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number	xbrli:sharesItemType	instant	null	base	ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
441	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant	xbrli:sharesItemType	instant	null	base	ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
442	Share Based Compensation Option And Incentive Plans Policy	nonnum:textBlockItemType	duration	null	base	ShareBasedCompensationOptionAndIncentivePlansPolicy
443	Short Term Debt Weighted Average Interest Rate	num:percentItemType	instant	null	base	ShortTermDebtWeightedAverageInterestRate
444	Short Term Borrowings	xbrli:monetaryItemType	instant	credit	base	ShortTermBorrowings
445	Significant Accounting Policies [Text Block]	nonnum:textBlockItemType	duration	null	base	SignificantAccountingPoliciesTextBlock
446	Standard Product Warranty Policy	nonnum:textBlockItemType	duration	null	base	StandardProductWarrantyPolicy
447	Stock Issued During Period Shares Employee Stock Purchase Plans	xbrli:sharesItemType	duration	null	base	StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
448	Stock Issued During Period Value New Issues	xbrli:monetaryItemType	duration	credit	base	StockIssuedDuringPeriodValueNewIssues
449	Stock Repurchase Program Remaining Authorized Repurchase Amount1	xbrli:monetaryItemType	instant	credit	base	StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
450	Stock Repurchase Program Authorized Amount1	xbrli:monetaryItemType	instant	credit	base	StockRepurchaseProgramAuthorizedAmount1
451	Stock Issued During Period Shares New Issues	xbrli:sharesItemType	duration	null	base	StockIssuedDuringPeriodSharesNewIssues
452	Stock Repurchased During Period Value	xbrli:monetaryItemType	duration	debit	base	StockRepurchasedDuringPeriodValue
453	Stock Repurchased During Period Shares	xbrli:sharesItemType	duration	null	base	StockRepurchasedDuringPeriodShares
454	Stockholders Equity	xbrli:monetaryItemType	instant	credit	base	StockholdersEquity
455	Stockholders Equity Other	xbrli:monetaryItemType	duration	debit	base	StockholdersEquityOther
456	Stockholders Equity Note Disclosure [Text Block]	nonnum:textBlockItemType	duration	null	base	StockholdersEquityNoteDisclosureTextBlock
457	Summary Of Income Tax Contingencies [Text Block]	nonnum:textBlockItemType	duration	null	base	SummaryOfIncomeTaxContingenciesTextBlock
458	Trade And Other Accounts Receivable Policy	nonnum:textBlockItemType	duration	null	base	TradeAndOtherAccountsReceivablePolicy
459	Undistributed Earnings Of Foreign Subsidiaries	xbrli:monetaryItemType	instant	credit	base	UndistributedEarningsOfForeignSubsidiaries
460	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense	xbrli:monetaryItemType	duration	debit	base	UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense
461	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities	xbrli:monetaryItemType	duration	debit	base	UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
462	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions	xbrli:monetaryItemType	duration	credit	base	UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions
463	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions	xbrli:monetaryItemType	duration	credit	base	UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
464	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions	xbrli:monetaryItemType	duration	debit	base	UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
465	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued	xbrli:monetaryItemType	instant	credit	base	UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued
466	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations	xbrli:monetaryItemType	duration	debit	base	UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations
467	Unrecognized Tax Benefits	xbrli:monetaryItemType	instant	credit	base	UnrecognizedTaxBenefits
468	Unrecognized Tax Benefits That Would Impact Effective Tax Rate	xbrli:monetaryItemType	instant	credit	base	UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
469	Unrecorded Unconditional Purchase Obligation Balance Sheet Amount	xbrli:monetaryItemType	instant	credit	base	UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount
470	Use Of Estimates	nonnum:textBlockItemType	duration	null	base	UseOfEstimates
471	Valuation Allowances And Reserves Balance	xbrli:monetaryItemType	instant	credit	base	ValuationAllowancesAndReservesBalance
472	Valuation Allowances And Reserves Deductions	xbrli:monetaryItemType	duration	debit	base	ValuationAllowancesAndReservesDeductions
473	Weighted Average Number Of Shares Outstanding Basic	xbrli:sharesItemType	duration	null	base	WeightedAverageNumberOfSharesOutstandingBasic
474	Weighted Average Number Of Diluted Shares Outstanding	xbrli:sharesItemType	duration	null	base	WeightedAverageNumberOfDilutedSharesOutstanding
475	Derivative Notional Amount	xbrli:monetaryItemType	instant	null	invest	DerivativeNotionalAmount
476	Amendment Flag	xbrli:booleanItemType	duration	null	other	AmendmentFlag
477	Current Fiscal Year End Date	xbrli:gMonthDayItemType	duration	null	other	CurrentFiscalYearEndDate
478	Document Period End Date	xbrli:dateItemType	duration	null	other	DocumentPeriodEndDate
479	Trading Symbol	xbrli:normalizedStringItemType	duration	null	other	TradingSymbol
480	Entity Well Known Seasoned Issuer	other:yesNoItemType	duration	null	other	EntityWellKnownSeasonedIssuer
481	Entity Voluntary Filers	other:yesNoItemType	duration	null	other	EntityVoluntaryFilers
482	Entity Current Reporting Status	other:yesNoItemType	duration	null	other	EntityCurrentReportingStatus
483	Entity Filer Category	other:filerCategoryItemType	duration	null	other	EntityFilerCategory
484	Entity Public Float	xbrli:monetaryItemType	instant	credit	other	EntityPublicFloat
485	Entity Registrant Name	xbrli:normalizedStringItemType	duration	null	other	EntityRegistrantName
486	Entity Central Index Key	other:centralIndexKeyItemType	duration	null	other	EntityCentralIndexKey
487	Entity Tax Identification Number	other:nineDigitItemType	duration	null	other	EntityTaxIdentificationNumber
488	Entity Common Stock Shares Outstanding	xbrli:sharesItemType	instant	null	other	EntityCommonStockSharesOutstanding
489	Entity Listing Par Value Per Share	num:perShareItemType	duration	null	other	EntityListingParValuePerShare
490	Document Fiscal Year Focus	xbrli:gYearItemType	duration	null	other	DocumentFiscalYearFocus
491	Document Fiscal Period Focus	other:fiscalPeriodItemType	duration	null	other	DocumentFiscalPeriodFocus
492	Document Type	other:submissionTypeItemType	duration	null	other	DocumentType

Model Structures

Model Structure
Network	100000 - Document - Document and Entity Information (http://www.xbrlsite.com/msft/role/DocumentDocumentAndEntityInformation)
Table	Document And Entity Information [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Document And Entity Information [Abstract]	Abstract	duration	null	msft:DocumentAndEntityInformationAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Document Type	Concept (xbrli:stringItemType)	duration	null	other:DocumentType
7	Amendment Flag	Concept (boolean)	duration	null	other:AmendmentFlag
8	Document Period End Date	Concept (date)	duration	null	other:DocumentPeriodEndDate
9	Document Fiscal Year Focus	Concept (gYear)	duration	null	other:DocumentFiscalYearFocus
10	Document Fiscal Period Focus	Concept (xbrli:tokenItemType)	duration	null	other:DocumentFiscalPeriodFocus
11	Trading Symbol	Concept (normalizedString)	duration	null	other:TradingSymbol
12	Entity Registrant Name	Concept (normalizedString)	duration	null	other:EntityRegistrantName
13	Entity Central Index Key	Concept (xbrli:tokenItemType)	duration	null	other:EntityCentralIndexKey
14	Current Fiscal Year End Date	Concept (gMonthDay)	duration	null	other:CurrentFiscalYearEndDate
15	Entity Well-known Seasoned Issuer	Concept (xbrli:tokenItemType)	duration	null	other:EntityWellKnownSeasonedIssuer
16	Entity Current Reporting Status	Concept (xbrli:tokenItemType)	duration	null	other:EntityCurrentReportingStatus
17	Entity Voluntary Filers	Concept (xbrli:tokenItemType)	duration	null	other:EntityVoluntaryFilers
18	Entity Filer Category	Concept (xbrli:stringItemType)	duration	null	other:EntityFilerCategory
19	Entity Common Stock, Par Value Per Share	Concept (xbrli:decimalItemType)	duration	null	other:EntityListingParValuePerShare
20	Entity Common Stock, Shares Outstanding	Concept (xbrli:shares)	instant	null	other:EntityCommonStockSharesOutstanding
21	Entity Public Float	Concept (xbrli:monetary)	instant	credit	other:EntityPublicFloat
22	I.R.S. Employer Identification No.	Concept (xbrli:tokenItemType)	duration	null	other:EntityTaxIdentificationNumber

Model Structure
Network	100010 - Statement - INCOME STATEMENTS (http://www.xbrlsite.com/msft/role/StatementINCOMESTATEMENTS)
Table	Income Statement [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Income Statement [Abstract]	Abstract	duration	null	base:IncomeStatementAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Revenue	Abstract	duration	null	base:SalesRevenueNetAbstract
7	Product	Concept (xbrli:monetary)	duration	credit	base:SalesRevenueGoodsNet
8	Service and other	Concept (xbrli:monetary)	duration	credit	msft:SalesRevenueServicesAndOtherNet
9	Total revenue	Concept (xbrli:monetary)	duration	credit	base:SalesRevenueNet
10	Cost of revenue	Abstract	duration	null	base:CostOfRevenueAbstract
11	Product	Concept (xbrli:monetary)	duration	debit	base:CostOfGoodsSold
12	Service and other	Concept (xbrli:monetary)	duration	debit	msft:CostOfServicesAndOther
13	Total cost of revenue	Concept (xbrli:monetary)	duration	debit	base:CostOfRevenue
14	Gross margin	Concept (xbrli:monetary)	duration	credit	base:GrossProfit
15	Research and development	Concept (xbrli:monetary)	duration	debit	base:ResearchAndDevelopmentExpense
16	Sales and marketing	Concept (xbrli:monetary)	duration	debit	base:SellingAndMarketingExpense
17	General and administrative	Concept (xbrli:monetary)	duration	debit	base:GeneralAndAdministrativeExpense
18	Impairment, integration, and restructuring	Concept (xbrli:monetary)	duration	debit	msft:ImpairmentIntegrationAndRestructuringExpenses
19	Operating income	Concept (xbrli:monetary)	duration	credit	base:OperatingIncomeLoss
20	Other income (expense), net	Concept (xbrli:monetary)	duration	credit	base:NonoperatingIncomeExpense
21	Income before income taxes	Concept (xbrli:monetary)	duration	credit	base:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
22	Provision for income taxes	Concept (xbrli:monetary)	duration	debit	base:IncomeTaxExpenseBenefit
23	Net income	Concept (xbrli:monetary)	duration	credit	base:NetIncomeLoss
24	Earnings per share:	Abstract	duration	null	base:EarningsPerShareAbstract
25	Basic	Concept (xbrli:decimalItemType)	duration	null	base:EarningsPerShareBasic
26	Diluted	Concept (xbrli:decimalItemType)	duration	null	base:EarningsPerShareDiluted
27	Weighted average shares outstanding:	Abstract	duration	null	base:WeightedAverageNumberOfSharesOutstandingAbstract
28	Basic	Concept (xbrli:shares)	duration	null	base:WeightedAverageNumberOfSharesOutstandingBasic
29	Diluted	Concept (xbrli:shares)	duration	null	base:WeightedAverageNumberOfDilutedSharesOutstanding
30	Cash dividends declared per common share	Concept (xbrli:decimalItemType)	duration	null	base:CommonStockDividendsPerShareDeclared

Model Structure
Network	100020 - Statement - COMPREHENSIVE INCOME STATEMENTS (http://www.xbrlsite.com/msft/role/StatementCOMPREHENSIVEINCOMESTATEMENTS)
Table	Statement Of Income And Comprehensive Income [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Statement Of Income And Comprehensive Income [Abstract]	Abstract	duration	null	base:StatementOfIncomeAndComprehensiveIncomeAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Net income	Concept (xbrli:monetary)	duration	credit	base:NetIncomeLoss
7	Other comprehensive income (loss):	Abstract	duration	null	base:OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract
8	Net unrealized gains (losses) on derivatives (net of tax effects of $(5), $(12), and $20)	Concept (xbrli:monetary)	duration	credit	base:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax
9	Net unrealized losses on investments (net of tax effects of $(613), $(121), and $(197))	Concept (xbrli:monetary)	duration	credit	base:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
10	Translation adjustments and other (net of tax effects of $9, $(33), and $16)	Concept (xbrli:monetary)	duration	credit	base:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
11	Other comprehensive loss	Concept (xbrli:monetary)	duration	credit	base:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
12	Comprehensive income	Concept (xbrli:monetary)	duration	credit	base:ComprehensiveIncomeNetOfTax

Model Structure
Network	100030 - Statement - COMPREHENSIVE INCOME STATEMENTS (Parenthetical) (http://www.xbrlsite.com/msft/role/StatementCOMPREHENSIVEINCOMESTATEMENTSParenthetical)
Table	Statement Of Income And Comprehensive Income [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Statement Of Income And Comprehensive Income [Abstract]	Abstract	duration	null	base:StatementOfIncomeAndComprehensiveIncomeAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Net unrealized gains (losses) on derivatives, tax effects	Concept (xbrli:monetary)	duration	debit	base:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax
7	Net unrealized losses on investments, tax effects	Concept (xbrli:monetary)	duration	debit	base:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax
8	Translation adjustments and other, tax effects	Concept (xbrli:monetary)	duration	debit	base:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax

Model Structure
Network	100040 - Statement - BALANCE SHEETS (http://www.xbrlsite.com/msft/role/StatementBALANCESHEETS)
Table	Statement Of Financial Position [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Statement Of Financial Position [Abstract]	Abstract	duration	null	base:StatementOfFinancialPositionAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Assets	Abstract	duration	null	base:AssetsAbstract
7	Current assets:	Abstract	duration	null	base:AssetsCurrentAbstract
8	Cash and cash equivalents	Concept (xbrli:monetary)	instant	debit	base:CashAndCashEquivalentsAtCarryingValue
9	Short-term investments (including securities loaned of $3,694 and $204)	Concept (xbrli:monetary)	instant	debit	base:AvailableForSaleSecuritiesCurrent
10	Total cash, cash equivalents, and short-term investments	Concept (xbrli:monetary)	instant	debit	base:CashCashEquivalentsAndShortTermInvestments
11	Accounts receivable, net of allowance for doubtful accounts of $405 and $426	Concept (xbrli:monetary)	instant	debit	base:AccountsReceivableNetCurrent
12	Inventories	Concept (xbrli:monetary)	instant	debit	base:InventoryNet
13	Other	Concept (xbrli:monetary)	instant	debit	base:OtherAssetsCurrent
14	Total current assets	Concept (xbrli:monetary)	instant	debit	base:AssetsCurrent
15	Property and equipment, net of accumulated depreciation of $24,179 and $19,800	Concept (xbrli:monetary)	instant	debit	base:PropertyPlantAndEquipmentNet
16	Equity and other investments	Concept (xbrli:monetary)	instant	debit	base:LongTermInvestments
17	Goodwill	Concept (xbrli:monetary)	instant	debit	base:Goodwill
18	Intangible assets, net	Concept (xbrli:monetary)	instant	debit	base:FiniteLivedIntangibleAssetsNet
19	Other long-term assets	Concept (xbrli:monetary)	instant	debit	base:OtherAssetsNoncurrent
20	Total assets	Concept (xbrli:monetary)	instant	debit	base:Assets
21	Liabilities and stockholders" equity	Abstract	duration	null	base:LiabilitiesAndStockholdersEquityAbstract
22	Current liabilities:	Abstract	duration	null	base:LiabilitiesCurrentAbstract
23	Accounts payable	Concept (xbrli:monetary)	instant	credit	base:AccountsPayableCurrent
24	Short-term debt	Concept (xbrli:monetary)	instant	credit	base:ShortTermBorrowings
25	Current portion of long-term debt	Concept (xbrli:monetary)	instant	credit	base:LongTermDebtCurrent
26	Accrued compensation	Concept (xbrli:monetary)	instant	credit	base:EmployeeRelatedLiabilitiesCurrent
27	Income taxes	Concept (xbrli:monetary)	instant	credit	base:AccruedIncomeTaxesCurrent
28	Short-term unearned revenue	Concept (xbrli:monetary)	instant	credit	base:DeferredRevenueCurrent
29	Securities lending payable	Concept (xbrli:monetary)	instant	credit	base:DepositsReceivedForSecuritiesLoanedAtCarryingValue
30	Other	Concept (xbrli:monetary)	instant	credit	base:OtherLiabilitiesCurrent
31	Total current liabilities	Concept (xbrli:monetary)	instant	credit	base:LiabilitiesCurrent
32	Long-term debt	Concept (xbrli:monetary)	instant	credit	base:LongTermDebtNoncurrent
33	Long-term unearned revenue	Concept (xbrli:monetary)	instant	credit	base:DeferredRevenueNoncurrent
34	Deferred income taxes	Concept (xbrli:monetary)	instant	credit	base:DeferredTaxLiabilitiesNoncurrent
35	Other long-term liabilities	Concept (xbrli:monetary)	instant	credit	base:OtherLiabilitiesNoncurrent
36	Total liabilities	Concept (xbrli:monetary)	instant	credit	base:Liabilities
37	Commitments and contingencies	Concept (xbrli:monetary)	instant	credit	base:CommitmentsAndContingencies
38	Stockholders" equity:	Abstract	duration	null	base:StockholdersEquityAbstract
39	Common stock and paid-in capital - shares authorized 24,000; outstanding 7,708 and 7,808	Concept (xbrli:monetary)	instant	credit	base:CommonStocksIncludingAdditionalPaidInCapital
40	Retained earnings	Concept (xbrli:monetary)	instant	credit	base:RetainedEarningsAccumulatedDeficit
41	Accumulated other comprehensive income	Concept (xbrli:monetary)	instant	credit	base:AccumulatedOtherComprehensiveIncomeLossNetOfTax
42	Total stockholders" equity	Concept (xbrli:monetary)	instant	credit	base:StockholdersEquity
43	Total liabilities and stockholders" equity	Concept (xbrli:monetary)	instant	credit	base:LiabilitiesAndStockholdersEquity

Model Structure
Network	100050 - Statement - BALANCE SHEETS (Parenthetical) (http://www.xbrlsite.com/msft/role/StatementBALANCESHEETSParenthetical)
Table	Statement Of Financial Position [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Statement Of Financial Position [Abstract]	Abstract	duration	null	base:StatementOfFinancialPositionAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Short-term investments, securities loaned	Concept (xbrli:monetary)	instant	credit	base:SecuritiesLoaned
7	Accounts receivable, allowance for doubtful accounts	Concept (xbrli:monetary)	instant	credit	base:AllowanceForDoubtfulAccountsReceivableCurrent
8	Property and equipment, accumulated depreciation	Concept (xbrli:monetary)	instant	credit	base:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
9	Common stock, shares authorized	Concept (xbrli:shares)	instant	null	base:CommonStockSharesAuthorized
10	Common stock, outstanding	Concept (xbrli:shares)	instant	null	base:CommonStockSharesOutstanding

Model Structure
Network	100060 - Statement - CASH FLOWS STATEMENTS (http://www.xbrlsite.com/msft/role/StatementCASHFLOWSSTATEMENTS)
Table	Statement Of Cash Flows [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Statement Of Cash Flows [Abstract]	Abstract	duration	null	base:StatementOfCashFlowsAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Operations	Abstract	duration	null	base:NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract
7	Net income	Concept (xbrli:monetary)	duration	credit	base:NetIncomeLoss
8	Adjustments to reconcile net income to net cash from operations:	Abstract	duration	null	base:AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract
9	Goodwill and asset impairments	Concept (xbrli:monetary)	duration	debit	base:AssetImpairmentCharges
10	Depreciation, amortization, and other	Concept (xbrli:monetary)	duration	debit	msft:DepreciationAmortizationAndOther
11	Stock-based compensation expense	Concept (xbrli:monetary)	duration	debit	base:ShareBasedCompensation
12	Net recognized gains on investments and derivatives	Concept (xbrli:monetary)	duration	credit	msft:GainLossOnInvestmentsAndDerivativeInstruments
13	Deferred income taxes	Concept (xbrli:monetary)	duration	debit	base:DeferredIncomeTaxExpenseBenefit
14	Deferral of unearned revenue	Concept (xbrli:monetary)	duration	debit	base:IncreaseDecreaseInDeferredRevenue
15	Recognition of unearned revenue	Concept (xbrli:monetary)	duration	credit	base:RecognitionOfDeferredRevenue
16	Changes in operating assets and liabilities:	Abstract	duration	null	base:IncreaseDecreaseInOperatingCapitalAbstract
17	Accounts receivable	Concept (xbrli:monetary)	duration	credit	base:IncreaseDecreaseInAccountsReceivable
18	Inventories	Concept (xbrli:monetary)	duration	credit	base:IncreaseDecreaseInInventories
19	Other current assets	Concept (xbrli:monetary)	duration	credit	base:IncreaseDecreaseInOtherCurrentAssets
20	Other long-term assets	Concept (xbrli:monetary)	duration	credit	base:IncreaseDecreaseInOtherNoncurrentAssets
21	Accounts payable	Concept (xbrli:monetary)	duration	debit	base:IncreaseDecreaseInAccountsPayable
22	Other current liabilities	Concept (xbrli:monetary)	duration	debit	base:IncreaseDecreaseInOtherCurrentLiabilities
23	Other long-term liabilities	Concept (xbrli:monetary)	duration	debit	base:IncreaseDecreaseInOtherNoncurrentLiabilities
24	Net cash from operations	Concept (xbrli:monetary)	duration	null	base:NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
25	Financing	Abstract	duration	null	base:NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract
26	Proceeds from issuance (repayments) of short-term debt, maturities of 90 days or less, net	Concept (xbrli:monetary)	duration	debit	base:ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess
27	Proceeds from issuance of debt	Concept (xbrli:monetary)	duration	debit	base:ProceedsFromDebtMaturingInMoreThanThreeMonths
28	Repayments of debt	Concept (xbrli:monetary)	duration	credit	base:RepaymentsOfDebtMaturingInMoreThanThreeMonths
29	Common stock issued	Concept (xbrli:monetary)	duration	debit	base:ProceedsFromIssuanceOfCommonStock
30	Common stock repurchased	Concept (xbrli:monetary)	duration	credit	base:PaymentsForRepurchaseOfCommonStock
31	Common stock cash dividends paid	Concept (xbrli:monetary)	duration	credit	base:PaymentsOfDividendsCommonStock
32	Other, net	Concept (xbrli:monetary)	duration	debit	base:ProceedsFromPaymentsForOtherFinancingActivities
33	Net cash from (used in) financing	Concept (xbrli:monetary)	duration	debit	base:NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
34	Investing	Abstract	duration	null	base:NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract
35	Additions to property and equipment	Concept (xbrli:monetary)	duration	credit	base:PaymentsToAcquirePropertyPlantAndEquipment
36	Acquisition of companies, net of cash acquired, and purchases of intangible and other assets	Concept (xbrli:monetary)	duration	credit	msft:AcquisitionsNetOfCashAcquiredAndPurchasesOfIntangibleAndOtherAssets
37	Purchases of investments	Concept (xbrli:monetary)	duration	credit	base:PaymentsToAcquireInvestments
38	Maturities of investments	Concept (xbrli:monetary)	duration	debit	base:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities
39	Sales of investments	Concept (xbrli:monetary)	duration	debit	base:ProceedsFromSaleOfAvailableForSaleSecurities
40	Securities lending payable	Concept (xbrli:monetary)	duration	credit	base:IncreaseDecreaseInCollateralHeldUnderSecuritiesLending
41	Net cash used in investing	Concept (xbrli:monetary)	duration	debit	base:NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
42	Effect of foreign exchange rates on cash and cash equivalents	Concept (xbrli:monetary)	duration	debit	base:EffectOfExchangeRateOnCashAndCashEquivalents
43	Net change in cash and cash equivalents	Concept (xbrli:monetary)	duration	debit	base:CashAndCashEquivalentsPeriodIncreaseDecrease
44	Cash and cash equivalents, beginning of period	Concept (xbrli:monetary)	instant	debit	base:CashAndCashEquivalentsAtCarryingValue
45	Cash and cash equivalents, end of period	Concept (xbrli:monetary)	instant	debit	base:CashAndCashEquivalentsAtCarryingValue

Model Structure
Network	100070 - Statement - STOCKHOLDERS' EQUITY STATEMENTS (http://www.xbrlsite.com/msft/role/StatementSTOCKHOLDERSEQUITYSTATEMENTS)
Table	Statement Of Stockholders Equity [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Statement Of Stockholders Equity [Abstract]	Abstract	duration	null	base:StatementOfStockholdersEquityAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Equity Components [Axis]	Axis	duration	null	base:StatementEquityComponentsAxis
6	Equity Component [Domain]	Member	duration	null	base:EquityComponentDomain
7	Common stock and paid-in capital	Member	duration	null	base:CommonStockIncludingAdditionalPaidInCapitalMember
8	Retained earnings	Member	duration	null	base:RetainedEarningsMember
9	Accumulated other comprehensive income	Member	duration	null	base:AccumulatedOtherComprehensiveIncomeMember
10	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
11	Balance, beginning of period	Concept (xbrli:monetary)	instant	credit	base:StockholdersEquity
12	Common stock issued	Concept (xbrli:monetary)	duration	credit	base:StockIssuedDuringPeriodValueNewIssues
13	Net income	Concept (xbrli:monetary)	duration	credit	base:NetIncomeLoss
14	Other comprehensive loss	Concept (xbrli:monetary)	duration	credit	base:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
15	Common stock cash dividends	Concept (xbrli:monetary)	duration	debit	base:DividendsCommonStockCash
16	Common stock repurchased	Concept (xbrli:monetary)	duration	debit	base:StockRepurchasedDuringPeriodValue
17	Stock-based compensation expense	Concept (xbrli:monetary)	duration	credit	base:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
18	Stock-based compensation income tax benefits	Concept (xbrli:monetary)	duration	credit	base:AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet
19	Other, net	Concept (xbrli:monetary)	duration	debit	base:StockholdersEquityOther
20	Balance, end of period	Concept (xbrli:monetary)	instant	credit	base:StockholdersEquity

Model Structure
Network	100080 - Disclosure - ACCOUNTING POLICIES (http://www.xbrlsite.com/msft/role/DisclosureACCOUNTINGPOLICIES)
Table	Accounting Policies [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Accounting Policies [Abstract]	Abstract	duration	null	base:AccountingPoliciesAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	ACCOUNTING POLICIES	Concept (nonnum:xmlNodesItemType)	duration	null	base:SignificantAccountingPoliciesTextBlock

Model Structure
Network	100090 - Disclosure - EARNINGS PER SHARE (http://www.xbrlsite.com/msft/role/DisclosureEARNINGSPERSHARE)
Table	Earnings Per Share [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Earnings Per Share [Abstract]	Abstract	duration	null	base:EarningsPerShareAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	EARNINGS PER SHARE	Concept (nonnum:xmlNodesItemType)	duration	null	base:EarningsPerShareTextBlock

Model Structure
Network	100100 - Disclosure - OTHER INCOME (EXPENSE), NET (http://www.xbrlsite.com/msft/role/DisclosureOTHERINCOMEEXPENSENET)
Table	Other Income And Expenses [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Other Income And Expenses [Abstract]	Abstract	duration	null	base:OtherIncomeAndExpensesAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	OTHER INCOME (EXPENSE), NET	Concept (nonnum:xmlNodesItemType)	duration	null	base:OtherNonoperatingIncomeAndExpenseTextBlock

Model Structure
Network	100110 - Disclosure - INVESTMENTS (http://www.xbrlsite.com/msft/role/DisclosureINVESTMENTS)
Table	Cash And Cash Equivalents [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Cash And Cash Equivalents [Abstract]	Abstract	duration	null	base:CashAndCashEquivalentsAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	INVESTMENTS	Concept (nonnum:xmlNodesItemType)	duration	null	base:InvestmentsInDebtAndEquityInstrumentsCashAndCashEquivalentsUnrealizedAndRealizedGainsLossesTextBlock

Model Structure
Network	100120 - Disclosure - DERIVATIVES (http://www.xbrlsite.com/msft/role/DisclosureDERIVATIVES)
Table	Derivative Instruments And Hedging Activities Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Derivative Instruments And Hedging Activities Disclosure [Abstract]	Abstract	duration	null	base:DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	DERIVATIVES	Concept (nonnum:xmlNodesItemType)	duration	null	base:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock

Model Structure
Network	100130 - Disclosure - FAIR VALUE MEASUREMENTS (http://www.xbrlsite.com/msft/role/DisclosureFAIRVALUEMEASUREMENTS)
Table	Fair Value Disclosures [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Fair Value Disclosures [Abstract]	Abstract	duration	null	base:FairValueDisclosuresAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	FAIR VALUE MEASUREMENTS	Concept (nonnum:xmlNodesItemType)	duration	null	base:FairValueDisclosuresTextBlock

Model Structure
Network	100140 - Disclosure - INVENTORIES (http://www.xbrlsite.com/msft/role/DisclosureINVENTORIES)
Table	Inventory Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Inventory Disclosure [Abstract]	Abstract	duration	null	base:InventoryDisclosureAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	INVENTORIES	Concept (nonnum:xmlNodesItemType)	duration	null	base:InventoryDisclosureTextBlock

Model Structure
Network	100150 - Disclosure - PROPERTY AND EQUIPMENT (http://www.xbrlsite.com/msft/role/DisclosurePROPERTYANDEQUIPMENT)
Table	Property Plant And Equipment [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Property Plant And Equipment [Abstract]	Abstract	duration	null	base:PropertyPlantAndEquipmentAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	PROPERTY AND EQUIPMENT	Concept (nonnum:xmlNodesItemType)	duration	null	base:PropertyPlantAndEquipmentDisclosureTextBlock

Model Structure
Network	100160 - Disclosure - BUSINESS COMBINATIONS (http://www.xbrlsite.com/msft/role/DisclosureBUSINESSCOMBINATIONS)
Table	Business Combinations [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Business Combinations [Abstract]	Abstract	duration	null	base:BusinessCombinationsAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	BUSINESS COMBINATIONS	Concept (nonnum:xmlNodesItemType)	duration	null	base:MergersAcquisitionsAndDispositionsDisclosuresTextBlock

Model Structure
Network	100170 - Disclosure - GOODWILL (http://www.xbrlsite.com/msft/role/DisclosureGOODWILL)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Goodwill And Intangible Assets Disclosure [Abstract]	Abstract	duration	null	base:GoodwillAndIntangibleAssetsDisclosureAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	GOODWILL	Concept (nonnum:xmlNodesItemType)	duration	null	base:GoodwillDisclosureTextBlock

Model Structure
Network	100180 - Disclosure - INTANGIBLE ASSETS (http://www.xbrlsite.com/msft/role/DisclosureINTANGIBLEASSETS)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Goodwill And Intangible Assets Disclosure [Abstract]	Abstract	duration	null	base:GoodwillAndIntangibleAssetsDisclosureAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	INTANGIBLE ASSETS	Concept (nonnum:xmlNodesItemType)	duration	null	base:IntangibleAssetsDisclosureTextBlock

Model Structure
Network	100190 - Disclosure - DEBT (http://www.xbrlsite.com/msft/role/DisclosureDEBT)
Table	Debt Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Debt Disclosure [Abstract]	Abstract	duration	null	base:DebtDisclosureAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	DEBT	Concept (nonnum:xmlNodesItemType)	duration	null	base:DebtDisclosureTextBlock

Model Structure
Network	100200 - Disclosure - INCOME TAXES (http://www.xbrlsite.com/msft/role/DisclosureINCOMETAXES)
Table	Income Tax Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Income Tax Disclosure [Abstract]	Abstract	duration	null	base:IncomeTaxDisclosureAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	INCOME TAXES	Concept (nonnum:xmlNodesItemType)	duration	null	base:IncomeTaxDisclosureTextBlock

Model Structure
Network	100210 - Disclosure - RESTRUCTURING CHARGES (http://www.xbrlsite.com/msft/role/DisclosureRESTRUCTURINGCHARGES)
Table	Restructuring And Related Activities [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Restructuring And Related Activities [Abstract]	Abstract	duration	null	base:RestructuringAndRelatedActivitiesAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	RESTRUCTURING CHARGES	Concept (nonnum:xmlNodesItemType)	duration	null	base:RestructuringAndRelatedActivitiesDisclosureTextBlock

Model Structure
Network	100220 - Disclosure - UNEARNED REVENUE (http://www.xbrlsite.com/msft/role/DisclosureUNEARNEDREVENUE)
Table	Deferred Revenue Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Deferred Revenue Disclosure [Abstract]	Abstract	duration	null	base:DeferredRevenueDisclosureAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	UNEARNED REVENUE	Concept (nonnum:xmlNodesItemType)	duration	null	base:DeferredRevenueDisclosureTextBlock

Model Structure
Network	100230 - Disclosure - COMMITMENTS (http://www.xbrlsite.com/msft/role/DisclosureCOMMITMENTS)
Table	Commitments And Contingencies Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Commitments And Contingencies Disclosure [Abstract]	Abstract	duration	null	base:CommitmentsAndContingenciesDisclosureAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	COMMITMENTS	Concept (nonnum:xmlNodesItemType)	duration	null	base:CommitmentsDisclosureTextBlock

Model Structure
Network	100240 - Disclosure - CONTINGENCIES (http://www.xbrlsite.com/msft/role/DisclosureCONTINGENCIES)
Table	Commitments And Contingencies Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Commitments And Contingencies Disclosure [Abstract]	Abstract	duration	null	base:CommitmentsAndContingenciesDisclosureAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	CONTINGENCIES	Concept (nonnum:xmlNodesItemType)	duration	null	base:LegalMattersAndContingenciesTextBlock

Model Structure
Network	100250 - Disclosure - STOCKHOLDERS' EQUITY (http://www.xbrlsite.com/msft/role/DisclosureSTOCKHOLDERSEQUITY)
Table	Equity [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Equity [Abstract]	Abstract	duration	null	base:EquityAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	STOCKHOLDERS" EQUITY	Concept (nonnum:xmlNodesItemType)	duration	null	base:StockholdersEquityNoteDisclosureTextBlock

Model Structure
Network	100260 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME (http://www.xbrlsite.com/msft/role/DisclosureACCUMULATEDOTHERCOMPREHENSIVEINCOME)
Table	Equity [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Equity [Abstract]	Abstract	duration	null	base:EquityAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	ACCUMULATED OTHER COMPREHENSIVE INCOME	Concept (nonnum:xmlNodesItemType)	duration	null	base:ComprehensiveIncomeNoteTextBlock

Model Structure
Network	100270 - Disclosure - EMPLOYEE STOCK AND SAVINGS PLANS (http://www.xbrlsite.com/msft/role/DisclosureEMPLOYEESTOCKANDSAVINGSPLANS)
Table	Postemployment Benefits [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Postemployment Benefits [Abstract]	Abstract	duration	null	base:PostemploymentBenefitsAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	EMPLOYEE STOCK AND SAVINGS PLANS	Concept (nonnum:xmlNodesItemType)	duration	null	base:CompensationAndEmployeeBenefitPlansTextBlock

Model Structure
Network	100280 - Disclosure - SEGMENT INFORMATION AND GEOGRAPHIC DATA (http://www.xbrlsite.com/msft/role/DisclosureSEGMENTINFORMATIONANDGEOGRAPHICDATA)
Table	Segment Reporting [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Segment Reporting [Abstract]	Abstract	duration	null	base:SegmentReportingAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	SEGMENT INFORMATION AND GEOGRAPHIC DATA	Concept (nonnum:xmlNodesItemType)	duration	null	base:SegmentReportingDisclosureTextBlock

Model Structure
Network	100290 - Disclosure - QUARTERLY INFORMATION (UNAUDITED) (http://www.xbrlsite.com/msft/role/DisclosureQUARTERLYINFORMATIONUNAUDITED)
Table	Quarterly Financial Information Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Quarterly Financial Information Disclosure [Abstract]	Abstract	duration	null	base:QuarterlyFinancialInformationDisclosureAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	QUARTERLY INFORMATION (UNAUDITED)	Concept (nonnum:xmlNodesItemType)	duration	null	base:QuarterlyFinancialInformationTextBlock

Model Structure
Network	100300 - Disclosure - ACCOUNTING POLICIES (Policies) (http://www.xbrlsite.com/msft/role/DisclosureACCOUNTINGPOLICIESPolicies)
Table	Accounting Policies [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Accounting Policies [Abstract]	Abstract	duration	null	base:AccountingPoliciesAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Accounting Principles	Concept (nonnum:xmlNodesItemType)	duration	null	base:BasisOfAccountingPolicyPolicyTextBlock
7	Principles of Consolidation	Concept (nonnum:xmlNodesItemType)	duration	null	base:ConsolidationPolicyTextBlock
8	Estimates and Assumptions	Concept (nonnum:xmlNodesItemType)	duration	null	base:UseOfEstimates
9	Foreign Currencies	Concept (nonnum:xmlNodesItemType)	duration	null	base:ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock
10	Product Revenue and Service and Other Revenue	Concept (nonnum:xmlNodesItemType)	duration	null	msft:ProductRevenueAndServiceAndOtherRevenuePolicyTextBlock
11	Revenue Recognition	Concept (nonnum:xmlNodesItemType)	duration	null	base:RevenueRecognitionPolicyTextBlock
12	Cost of Revenue	Concept (nonnum:xmlNodesItemType)	duration	null	base:CostOfSalesPolicyTextBlock
13	Product Warranty	Concept (nonnum:xmlNodesItemType)	duration	null	base:StandardProductWarrantyPolicy
14	Research and Development	Concept (nonnum:xmlNodesItemType)	duration	null	base:ResearchDevelopmentAndComputerSoftwarePolicyTextBlock
15	Sales and Marketing	Concept (nonnum:xmlNodesItemType)	duration	null	msft:SellingAndMarketingPolicyTextBlock
16	Stock-Based Compensation	Concept (nonnum:xmlNodesItemType)	duration	null	base:ShareBasedCompensationOptionAndIncentivePlansPolicy
17	Income Taxes	Concept (nonnum:xmlNodesItemType)	duration	null	base:IncomeTaxPolicyTextBlock
18	Fair Value Measurements	Concept (nonnum:xmlNodesItemType)	duration	null	base:FairValueOfFinancialInstrumentsPolicy
19	Investments	Concept (nonnum:xmlNodesItemType)	duration	null	base:InvestmentPolicyTextBlock
20	Derivatives	Concept (nonnum:xmlNodesItemType)	duration	null	base:DerivativesPolicyTextBlock
21	Allowance for Doubtful Accounts	Concept (nonnum:xmlNodesItemType)	duration	null	base:TradeAndOtherAccountsReceivablePolicy
22	Inventories	Concept (nonnum:xmlNodesItemType)	duration	null	base:InventoryPolicyTextBlock
23	Property and Equipment	Concept (nonnum:xmlNodesItemType)	duration	null	base:PropertyPlantAndEquipmentPolicyTextBlock
24	Goodwill	Concept (nonnum:xmlNodesItemType)	duration	null	base:GoodwillAndIntangibleAssetsGoodwillPolicy
25	Intangible Assets	Concept (nonnum:xmlNodesItemType)	duration	null	base:IntangibleAssetsFiniteLivedPolicy
26	Recent Accounting Guidance	Concept (nonnum:xmlNodesItemType)	duration	null	base:NewAccountingPronouncementsPolicyPolicyTextBlock
27	Earnings Per Share	Concept (nonnum:xmlNodesItemType)	duration	null	base:EarningsPerSharePolicyTextBlock
28	Segment Reporting	Concept (nonnum:xmlNodesItemType)	duration	null	base:SegmentReportingPolicyPolicyTextBlock

Model Structure
Network	100310 - Disclosure - ACCOUNTING POLICIES (Tables) (http://www.xbrlsite.com/msft/role/DisclosureACCOUNTINGPOLICIESTables)
Table	Accounting Policies [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Accounting Policies [Abstract]	Abstract	duration	null	base:AccountingPoliciesAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Allowance for Doubtful Accounts	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfCreditLossesForFinancingReceivablesCurrentTableTextBlock
7	Expected Impacts of Adoption of Standards Related to Revenue Recognition and Leases to Reported Results	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfNewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock

Model Structure
Network	100320 - Disclosure - EARNINGS PER SHARE (Tables) (http://www.xbrlsite.com/msft/role/DisclosureEARNINGSPERSHARETables)
Table	Earnings Per Share [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Earnings Per Share [Abstract]	Abstract	duration	null	base:EarningsPerShareAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Basic and Diluted Earnings Per Share	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock

Model Structure
Network	100330 - Disclosure - OTHER INCOME (EXPENSE), NET (Tables) (http://www.xbrlsite.com/msft/role/DisclosureOTHERINCOMEEXPENSENETTables)
Table	Other Income And Expenses [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Other Income And Expenses [Abstract]	Abstract	duration	null	base:OtherIncomeAndExpensesAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Components of Other Income (Expense), Net	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfOtherNonoperatingIncomeExpenseTableTextBlock
7	Net Recognized Gains (Losses) on Investments	Concept (nonnum:xmlNodesItemType)	duration	null	base:RealizedGainLossOnInvestmentsTableTextBlock

Model Structure
Network	100340 - Disclosure - INVESTMENTS (Tables) (http://www.xbrlsite.com/msft/role/DisclosureINVESTMENTSTables)
Table	Cash And Cash Equivalents [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Cash And Cash Equivalents [Abstract]	Abstract	duration	null	base:CashAndCashEquivalentsAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Investment Components, Including Associated Derivatives	Concept (nonnum:xmlNodesItemType)	duration	null	msft:ScheduleOfCashCashEquivalentsAndInvestmentsTableTextBlock
7	Unrealized Losses on Investments	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock
8	Debt Investment Maturities	Concept (nonnum:xmlNodesItemType)	duration	null	base:InvestmentsClassifiedByContractualMaturityDateTableTextBlock

Model Structure
Network	100350 - Disclosure - DERIVATIVES (Tables) (http://www.xbrlsite.com/msft/role/DisclosureDERIVATIVESTables)
Table	Derivative Instruments And Hedging Activities Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Derivative Instruments And Hedging Activities Disclosure [Abstract]	Abstract	duration	null	base:DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Hedging Relationship [Axis]	Axis	duration	null	base:DerivativeInstrumentsGainLossByHedgingRelationshipAxis
6	Hedging Relationship [Domain]	Member	duration	null	base:HedgingRelationshipDomain
7	Fair value hedging	Member	duration	null	base:FairValueHedgingMember
8	Cash flow hedging	Member	duration	null	base:CashFlowHedgingMember
9	Hedging Designation	Axis	duration	null	base:HedgingDesignationAxis
10	Hedging Designation [Domain]	Member	duration	null	base:HedgingDesignationDomain
11	Non-designated Hedge Derivatives	Member	duration	null	base:NondesignatedMember
12	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
13	Fair Values of Derivative Instruments	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock
14	Gains (Losses) on Derivative Instruments	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock

Model Structure
Network	100360 - Disclosure - FAIR VALUE MEASUREMENTS (Tables) (http://www.xbrlsite.com/msft/role/DisclosureFAIRVALUEMEASUREMENTSTables)
Table	Fair Value Disclosures [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Fair Value Disclosures [Abstract]	Abstract	duration	null	base:FairValueDisclosuresAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Financial Assets and Liabilities Measured at Fair Value on Recurring Basis	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock
7	Reconciliation of Total Assets Measured at Fair Value on Recurring Basis to Balance Sheet Presentation	Concept (nonnum:xmlNodesItemType)	duration	null	msft:ReconciliationOfAssetsMeasuredAtFairValueOnRecurringBasisToBalanceSheetPresentationTableTextBlock

Model Structure
Network	100370 - Disclosure - INVENTORIES (Tables) (http://www.xbrlsite.com/msft/role/DisclosureINVENTORIESTables)
Table	Inventory Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Inventory Disclosure [Abstract]	Abstract	duration	null	base:InventoryDisclosureAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Components of Inventories	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfInventoryCurrentTableTextBlock

Model Structure
Network	100380 - Disclosure - PROPERTY AND EQUIPMENT (Tables) (http://www.xbrlsite.com/msft/role/DisclosurePROPERTYANDEQUIPMENTTables)
Table	Property Plant And Equipment [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Property Plant And Equipment [Abstract]	Abstract	duration	null	base:PropertyPlantAndEquipmentAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Components of Property and Equipment	Concept (nonnum:xmlNodesItemType)	duration	null	base:PropertyPlantAndEquipmentTextBlock

Model Structure
Network	100390 - Disclosure - BUSINESS COMBINATIONS (Tables) (http://www.xbrlsite.com/msft/role/DisclosureBUSINESSCOMBINATIONSTables)
Table	Business Combinations [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Business Combinations [Abstract]	Abstract	duration	null	base:BusinessCombinationsAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Business Acquisition	Axis	duration	null	base:BusinessAcquisitionAxis
6	Business Acquisition, Acquiree	Member	duration	null	base:BusinessAcquisitionAcquireeDomain
7	LinkedIn Corporation	Member	duration	null	msft:LinkedInCorporationMember
8	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
9	Major Classes of Assets and Liabilities to Which We Allocated the Purchase Price	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock
10	Acquired Intangible Assets	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfAcquiredFiniteLivedIntangibleAssetsByMajorClassTextBlock
11	Revenue and Operating Loss Attributable to Acquiree, Since the Date of Acquisition	Concept (nonnum:xmlNodesItemType)	duration	null	msft:RevenueAndOperatingLossAttributableToAcquireeSinceAcquisitionDateTableTextBlock
12	Supplemental Consolidated Financial Results on Unaudited Pro Forma Basis, as If the Acquisition Had Been Consummated on Beginning of Period	Concept (nonnum:xmlNodesItemType)	duration	null	base:BusinessAcquisitionProFormaInformationTextBlock

Model Structure
Network	100400 - Disclosure - GOODWILL (Tables) (http://www.xbrlsite.com/msft/role/DisclosureGOODWILLTables)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Goodwill And Intangible Assets Disclosure [Abstract]	Abstract	duration	null	base:GoodwillAndIntangibleAssetsDisclosureAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Carrying Amount of Goodwill	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfGoodwillTextBlock

Model Structure
Network	100410 - Disclosure - INTANGIBLE ASSETS (Tables) (http://www.xbrlsite.com/msft/role/DisclosureINTANGIBLEASSETSTables)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Goodwill And Intangible Assets Disclosure [Abstract]	Abstract	duration	null	base:GoodwillAndIntangibleAssetsDisclosureAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Finite-Lived Intangible Assets	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock
7	Acquired Intangible Assets	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfAcquiredFiniteLivedIntangibleAssetsByMajorClassTextBlock
8	Estimated Future Amortization Expense Related to Intangible Assets	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock

Model Structure
Network	100420 - Disclosure - DEBT (Tables) (http://www.xbrlsite.com/msft/role/DisclosureDEBTTables)
Table	Debt Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Debt Disclosure [Abstract]	Abstract	duration	null	base:DebtDisclosureAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Long-term Debt	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfDebtInstrumentsTextBlock
7	Maturities of Long-term Debt	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfMaturitiesOfLongTermDebtTableTextBlock

Model Structure
Network	100430 - Disclosure - INCOME TAXES (Tables) (http://www.xbrlsite.com/msft/role/DisclosureINCOMETAXESTables)
Table	Income Tax Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Income Tax Disclosure [Abstract]	Abstract	duration	null	base:IncomeTaxDisclosureAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Provision for Income Taxes	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock
7	Income (Loss) Before Income Taxes	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfIncomeBeforeIncomeTaxDomesticAndForeignTableTextBlock
8	Difference Between Income Taxes Computed at Federal Statutory Rate and Provision for Income Taxes	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock
9	Deferred Income Tax Assets and Liabilities	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock
10	Changes in Unrecognized Tax Benefits	Concept (nonnum:xmlNodesItemType)	duration	null	base:SummaryOfIncomeTaxContingenciesTextBlock

Model Structure
Network	100440 - Disclosure - RESTRUCTURING CHARGES (Tables) (http://www.xbrlsite.com/msft/role/DisclosureRESTRUCTURINGCHARGESTables)
Table	Restructuring And Related Activities [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Restructuring And Related Activities [Abstract]	Abstract	duration	null	base:RestructuringAndRelatedActivitiesAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Changes in Restructuring Liability	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfRestructuringReserveByTypeOfCostTextBlock

Model Structure
Network	100450 - Disclosure - UNEARNED REVENUE (Tables) (http://www.xbrlsite.com/msft/role/DisclosureUNEARNEDREVENUETables)
Table	Deferred Revenue Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Deferred Revenue Disclosure [Abstract]	Abstract	duration	null	base:DeferredRevenueDisclosureAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Unearned Revenue by Segment	Concept (nonnum:xmlNodesItemType)	duration	null	msft:DeferredRevenueBySegmentTextBlock

Model Structure
Network	100460 - Disclosure - COMMITMENTS (Tables) (http://www.xbrlsite.com/msft/role/DisclosureCOMMITMENTSTables)
Table	Commitments And Contingencies Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Commitments And Contingencies Disclosure [Abstract]	Abstract	duration	null	base:CommitmentsAndContingenciesDisclosureAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Future Minimum Rental Commitments Under Non-cancellable Operating Leases	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock
7	Future Minimum Lease Payments under Non-cancellable Capital Leases	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfFutureMinimumLeasePaymentsForCapitalLeasesTableTextBlock

Model Structure
Network	100470 - Disclosure - STOCKHOLDERS' EQUITY (Tables) (http://www.xbrlsite.com/msft/role/DisclosureSTOCKHOLDERSEQUITYTables)
Table	Equity [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Equity [Abstract]	Abstract	duration	null	base:EquityAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Shares of Common Stock Outstanding	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfCommonStockOutstandingRollForwardTableTextBlock
7	Share Repurchases	Concept (nonnum:xmlNodesItemType)	duration	null	msft:ShareRepurchaseProgramDisclosureTableTextBlock
8	Dividends Declared	Concept (nonnum:xmlNodesItemType)	duration	null	base:DividendsDeclaredTableTextBlock

Model Structure
Network	100480 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables) (http://www.xbrlsite.com/msft/role/DisclosureACCUMULATEDOTHERCOMPREHENSIVEINCOMETables)
Table	Equity [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Equity [Abstract]	Abstract	duration	null	base:EquityAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Summary of Changes in Accumulated Other Comprehensive Income by Component	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock

Model Structure
Network	100490 - Disclosure - EMPLOYEE STOCK AND SAVINGS PLANS (Tables) (http://www.xbrlsite.com/msft/role/DisclosureEMPLOYEESTOCKANDSAVINGSPLANSTables)
Table	Postemployment Benefits [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Postemployment Benefits [Abstract]	Abstract	duration	null	base:PostemploymentBenefitsAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Stock-Based Compensation Expense and Related Income Tax Benefits	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock
7	Assumptions Used in Estimating the Fair Value of Stock Award Grants	Concept (nonnum:xmlNodesItemType)	duration	null	msft:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMethodUsedTableTextBlock
8	Stock Plan Activity	Concept (nonnum:xmlNodesItemType)	duration	null	base:DisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTextBlock
9	Employee Purchased Shares	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfShareBasedCompensationEmployeeStockPurchasePlanActivityTableTextBlock

Model Structure
Network	100500 - Disclosure - SEGMENT INFORMATION AND GEOGRAPHIC DATA (Tables) (http://www.xbrlsite.com/msft/role/DisclosureSEGMENTINFORMATIONANDGEOGRAPHICDATATables)
Table	Segment Reporting [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Segment Reporting [Abstract]	Abstract	duration	null	base:SegmentReportingAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Segment Revenue	Concept (nonnum:xmlNodesItemType)	duration	null	base:ReconciliationOfRevenueFromSegmentsToConsolidatedTextBlock
7	Segment Operating Income (Loss)	Concept (nonnum:xmlNodesItemType)	duration	null	base:ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTextBlock
8	Revenue Classified by Major Geographic Areas	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfRevenueFromExternalCustomersAttributedToForeignCountriesByGeographicAreaTextBlock
9	Revenue Classified by Significant Product and Service Offerings	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock
10	Long-Lived Assets, Excluding Financial Instruments and Tax Assets, Classified by Location of Controlling Statutory Company	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfEntityWideDisclosureOnGeographicAreasLongLivedAssetsInIndividualForeignCountriesByCountryTextBlock

Model Structure
Network	100510 - Disclosure - QUARTERLY INFORMATION (UNAUDITED) (Tables) (http://www.xbrlsite.com/msft/role/DisclosureQUARTERLYINFORMATIONUNAUDITEDTables)
Table	Quarterly Financial Information Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Quarterly Financial Information Disclosure [Abstract]	Abstract	duration	null	base:QuarterlyFinancialInformationDisclosureAbstract
2	Statement [Table]	Table	duration	null	base:StatementTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement [Line Items]	LineItems	duration	null	base:StatementLineItems
6	Quarterly Information (Unaudited)	Concept (nonnum:xmlNodesItemType)	duration	null	base:ScheduleOfQuarterlyFinancialInformationTableTextBlock

Model Structure
Network	100520 - Disclosure - Accounting Policies - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureAccountingPoliciesAdditionalInformationDetail)
Table	Accounting Policies [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Accounting Policies [Abstract]	Abstract	duration	null	base:AccountingPoliciesAbstract
2	Significant Accounting Policies [Table]	Table	duration	null	msft:SignificantAccountingPoliciesTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Deferred Revenue Arrangement Type	Axis	duration	null	base:DeferredRevenueArrangementTypeAxis
6	Deferred Revenue [Domain]	Member	duration	null	base:DeferredRevenueArrangementTypeDomain
7	Windows 10 Licenses	Member	duration	null	msft:WindowsTenDeferralMember
8	Range	Axis	duration	null	base:RangeAxis
9	Range [Domain]	Member	duration	null	base:RangeMember
10	Lower Limit	Member	duration	null	base:MinimumMember
11	Upper Limit	Member	duration	null	base:MaximumMember
12	Property, Plant and Equipment, Type [Axis]	Axis	duration	null	base:PropertyPlantAndEquipmentByTypeAxis
13	Property, Plant and Equipment, Type [Domain]	Member	duration	null	base:PropertyPlantAndEquipmentTypeDomain
14	Software	Member	duration	null	base:SoftwareAndSoftwareDevelopmentCostsMember
15	Computer Equipment	Member	duration	null	base:ComputerEquipmentMember
16	Buildings and Improvements	Member	duration	null	base:BuildingAndBuildingImprovementsMember
17	Leasehold Improvements	Member	duration	null	base:LeaseholdImprovementsMember
18	Furniture and Fixtures	Member	duration	null	base:FurnitureAndFixturesMember
19	Adjustments for New Accounting Pronouncements	Axis	duration	null	base:AdjustmentsForNewAccountingPronouncementsAxis
20	Type of Adoption	Member	duration	null	base:TypeOfAdoptionMember
21	Accounting Standards Update 2016-02	Member	duration	null	base:AccountingStandardsUpdate201602Member
22	Accounting Standards Update 2014-09	Member	duration	null	base:AccountingStandardsUpdate201409Member
23	Scenario	Axis	duration	null	base:StatementScenarioAxis
24	Scenario, Unspecified	Member	duration	null	base:ScenarioUnspecifiedDomain
25	Scenario Plan	Member	duration	null	base:ScenarioPlanMember
26	Significant Accounting Policies [Line Items]	LineItems	duration	null	msft:SignificantAccountingPoliciesLineItems
27	Revenue recognition period	Concept (duration)	duration	null	msft:RevenueRecognitionPeriod
28	Advertising expense	Concept (xbrli:monetary)	duration	debit	base:AdvertisingExpense
29	Estimated useful lives	Concept (duration)	duration	null	base:PropertyPlantAndEquipmentUsefulLife
30	Estimated useful lives of intangible assets	Concept (duration)	duration	null	base:FiniteLivedIntangibleAssetUsefulLife
31	Recognition of additional ROU assets for operating leases	Concept (xbrli:monetary)	instant	debit	msft:OperatingLeaseRightOfUseAssets
32	Recognition of additional lease liabilities for operating leases	Concept (xbrli:monetary)	instant	credit	msft:OperatingLeaseLiabilities
33	Revenue	Concept (xbrli:monetary)	duration	credit	base:SalesRevenueNet
34	Provision for income taxes	Concept (xbrli:monetary)	duration	debit	base:IncomeTaxExpenseBenefit
35	Accounts receivable and other current and long-term assets	Concept (xbrli:monetary)	instant	debit	msft:AccountsReceivableNetAndOtherAssets
36	Unearned revenue	Concept (xbrli:monetary)	instant	credit	base:DeferredRevenue
37	Deferred income taxes	Concept (xbrli:monetary)	instant	credit	base:DeferredTaxLiabilitiesNoncurrent

Model Structure
Network	100530 - Disclosure - Allowance for Doubtful Accounts (Detail) (http://www.xbrlsite.com/msft/role/DisclosureAllowanceForDoubtfulAccountsDetail)
Table	Organization Consolidation And Presentation Of Financial Statements [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Organization Consolidation And Presentation Of Financial Statements [Abstract]	Abstract	duration	null	base:OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
2	Valuation and Qualifying Accounts Disclosure [Table]	Table	duration	null	base:ValuationAndQualifyingAccountsDisclosureTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Valuation Allowances and Reserves Type [Axis]	Axis	duration	null	base:ValuationAllowancesAndReservesTypeAxis
6	Valuation Allowances and Reserves [Domain]	Member	duration	null	base:ValuationAllowancesAndReservesDomain
7	Allowance for doubtful accounts	Member	duration	null	base:AllowanceForDoubtfulAccountsMember
8	Valuation and Qualifying Accounts Disclosure [Line Items]	LineItems	duration	null	base:ValuationAndQualifyingAccountsDisclosureLineItems
9	Balance, beginning of period	Concept (xbrli:monetary)	instant	credit	base:ValuationAllowancesAndReservesBalance
10	Charged to costs and other	Concept (xbrli:monetary)	duration	credit	msft:ValuationAllowancesAndReservesChargedToCostsAndOther
11	Write-offs	Concept (xbrli:monetary)	duration	debit	base:ValuationAllowancesAndReservesDeductions
12	Balance, end of period	Concept (xbrli:monetary)	instant	credit	base:ValuationAllowancesAndReservesBalance

Model Structure
Network	100540 - Disclosure - Expected Impacts of Adoption of Standards Related to Revenue Recognition and Leases to Reported Results - (Detail) (http://www.xbrlsite.com/msft/role/DisclosureExpectedImpactsOfAdoptionOfStandardsRelatedToRevenueRecognitionAndLeasesToReportedResultsDetail)
Table	Accounting Policies [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Accounting Policies [Abstract]	Abstract	duration	null	base:AccountingPoliciesAbstract
2	New Accounting Pronouncements Or Change In Accounting Principle [Table]	Table	duration	null	base:NewAccountingPronouncementsOrChangeInAccountingPrincipleTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Adjustments for New Accounting Pronouncements	Axis	duration	null	base:AdjustmentsForNewAccountingPronouncementsAxis
6	Type of Adoption	Member	duration	null	base:TypeOfAdoptionMember
7	New Revenue Standard Adjustment	Member	duration	null	base:AccountingStandardsUpdate201409Member
8	New Lease Standard Adjustment	Member	duration	null	base:AccountingStandardsUpdate201602Member
9	Scenario	Axis	duration	null	base:StatementScenarioAxis
10	Scenario, Unspecified	Member	duration	null	base:ScenarioUnspecifiedDomain
11	Scenario Plan	Member	duration	null	base:ScenarioPlanMember
12	New Accounting Pronouncements Or Change In Accounting Principle [Line Items]	LineItems	duration	null	base:NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems
13	Income statements:	Abstract	duration	null	base:IncomeStatementAbstract
14	Revenue	Concept (xbrli:monetary)	duration	credit	base:SalesRevenueNet
15	Provision for income taxes	Concept (xbrli:monetary)	duration	debit	base:IncomeTaxExpenseBenefit
16	Net income	Concept (xbrli:monetary)	duration	credit	base:NetIncomeLoss
17	Diluted	Concept (xbrli:decimalItemType)	duration	null	base:EarningsPerShareDiluted
18	Balance sheets:	Abstract	duration	null	base:StatementOfFinancialPositionAbstract
19	Accounts receivable, net	Concept (xbrli:monetary)	instant	debit	base:AccountsReceivableNetCurrent
20	Operating lease right-of-use assets	Concept (xbrli:monetary)	instant	debit	base:OperatingLeaseRightOfUseAsset
21	Other current and long-term assets	Concept (xbrli:monetary)	instant	debit	base:OtherAssets
22	Unearned revenue	Concept (xbrli:monetary)	instant	credit	base:DeferredRevenue
23	Deferred income taxes	Concept (xbrli:monetary)	instant	credit	base:DeferredTaxLiabilitiesNoncurrent
24	Operating lease liabilities	Concept (xbrli:monetary)	instant	credit	base:OperatingLeaseLiability
25	Other current and long-term liabilities	Concept (xbrli:monetary)	instant	credit	base:OtherLiabilities
26	Stockholders" equity	Concept (xbrli:monetary)	instant	credit	base:StockholdersEquity

Model Structure
Network	100550 - Disclosure - Basic and Diluted Earnings Per Share (Detail) (http://www.xbrlsite.com/msft/role/DisclosureBasicAndDilutedEarningsPerShareDetail)
Table	Earnings Per Share Basic And Diluted [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Earnings Per Share Basic And Diluted [Abstract]	Abstract	duration	null	base:EarningsPerShareBasicAndDilutedAbstract
2	Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Table]	Table	duration	null	msft:ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]	LineItems	duration	null	msft:ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassLineItems
6	Net income available for common shareholders (A)	Concept (xbrli:monetary)	duration	credit	base:NetIncomeLoss
7	Weighted average outstanding shares of common stock (B)	Concept (xbrli:shares)	duration	null	base:WeightedAverageNumberOfSharesOutstandingBasic
8	Dilutive effect of stock-based awards	Concept (xbrli:shares)	duration	null	base:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
9	Common stock and common stock equivalents (C)	Concept (xbrli:shares)	duration	null	base:WeightedAverageNumberOfDilutedSharesOutstanding
10	Earnings Per Share	Abstract	duration	null	base:EarningsPerShareAbstract
11	Basic (A/B)	Concept (xbrli:decimalItemType)	duration	null	base:EarningsPerShareBasic
12	Diluted (A/C)	Concept (xbrli:decimalItemType)	duration	null	base:EarningsPerShareDiluted

Model Structure
Network	100560 - Disclosure - Components of Other Income (Expense), Net (Detail) (http://www.xbrlsite.com/msft/role/DisclosureComponentsOfOtherIncomeExpenseNetDetail)
Table	Other Income And Expenses [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Other Income And Expenses [Abstract]	Abstract	duration	null	base:OtherIncomeAndExpensesAbstract
2	Other Income Expense [Table]	Table	duration	null	msft:OtherIncomeExpenseTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Components of Other Income (Expense) [Line Items]	LineItems	duration	null	base:ComponentOfOtherIncomeNonoperatingLineItems
6	Dividends and interest income	Concept (xbrli:monetary)	duration	credit	base:InvestmentIncomeNet
7	Interest expense	Concept (xbrli:monetary)	duration	debit	base:InterestExpense
8	Net recognized gains on investments	Concept (xbrli:monetary)	duration	credit	base:GainLossOnInvestments
9	Net losses on derivatives	Concept (xbrli:monetary)	duration	credit	base:GainLossOnDerivativeInstrumentsNetPretax
10	Net gains (losses) on foreign currency remeasurements	Concept (xbrli:monetary)	duration	credit	base:ForeignCurrencyTransactionGainLossBeforeTax
11	Other, net	Concept (xbrli:monetary)	duration	credit	base:OtherNonoperatingIncomeExpense
12	Total	Concept (xbrli:monetary)	duration	credit	base:NonoperatingIncomeExpense

Model Structure
Network	100570 - Disclosure - Net Recognized Gains (Losses) on Investments (Detail) (http://www.xbrlsite.com/msft/role/DisclosureNetRecognizedGainsLossesOnInvestmentsDetail)
Table	Statement Of Income And Comprehensive Income [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Statement Of Income And Comprehensive Income [Abstract]	Abstract	duration	null	base:StatementOfIncomeAndComprehensiveIncomeAbstract
2	Schedule of Gain (Loss) on Investments [Table]	Table	duration	null	base:ScheduleOfGainLossOnInvestmentsTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Gains (Losses) on Investments [Line Items]	LineItems	duration	null	base:ScheduleOfGainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostIncomeStatementReportedAmountsSummaryLineItems
6	Other-than-temporary impairments of investments	Concept (xbrli:monetary)	duration	debit	base:MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount
7	Realized gains from sales of available-for-sale securities	Concept (xbrli:monetary)	duration	credit	base:AvailableForSaleSecuritiesGrossRealizedGains
8	Realized losses from sales of available-for-sale securities	Concept (xbrli:monetary)	duration	debit	base:AvailableForSaleSecuritiesGrossRealizedLosses
9	Total	Concept (xbrli:monetary)	duration	credit	base:GainLossOnInvestments

Model Structure
Network	100580 - Disclosure - Investment Components, Including Associated Derivatives (Detail) (http://www.xbrlsite.com/msft/role/DisclosureInvestmentComponentsIncludingAssociatedDerivativesDetail)
Table	Investments Debt And Equity Securities [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Investments Debt And Equity Securities [Abstract]	Abstract	duration	null	base:InvestmentsDebtAndEquitySecuritiesAbstract
2	Cash, Cash Equivalents and Investments [Table]	Table	duration	null	msft:CashCashEquivalentsAndInvestmentsTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Schedule of Investment Income, Reported Amounts, by Category	Axis	duration	null	base:InvestmentTypeAxis
6	Investments [Domain]	Member	duration	null	base:InvestmentTypeCategorizationMember
7	Cash	Member	duration	null	base:CashMember
8	Mutual funds	Member	duration	null	base:MoneyMarketFundsMember
9	Commercial paper	Member	duration	null	base:CommercialPaperMember
10	Certificates of deposit	Member	duration	null	base:CertificatesOfDepositMember
11	U.S. government and agency securities	Member	duration	null	base:USGovernmentAgenciesDebtSecuritiesMember
12	Foreign government bonds	Member	duration	null	base:ForeignGovernmentDebtSecuritiesMember
13	Mortgage- and asset-backed securities	Member	duration	null	base:AssetBackedSecuritiesMember
14	Corporate notes and bonds	Member	duration	null	base:CorporateDebtSecuritiesMember
15	Municipal securities	Member	duration	null	base:USStatesAndPoliticalSubdivisionsMember
16	Common and preferred stock	Member	duration	null	base:EquitySecuritiesMember
17	Other investments	Member	duration	null	msft:OtherSecurityInvestmentsMember
18	Cash, Cash Equivalents and Investments [Line Items]	LineItems	duration	null	msft:CashCashEquivalentsAndInvestmentsLineItems
19	Cost Basis	Concept (xbrli:monetary)	instant	debit	base:AvailableForSaleSecuritiesAmortizedCost
20	Cost Basis	Concept (xbrli:monetary)	instant	debit	base:EquityMethodInvestmentAggregateCost
21	Cash	Concept (xbrli:monetary)	instant	debit	base:Cash
22	Unrealized Gains	Concept (xbrli:monetary)	instant	credit	base:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
23	Unrealized Losses	Concept (xbrli:monetary)	instant	debit	base:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
24	Recorded Basis	Concept (xbrli:monetary)	instant	debit	base:AvailableForSaleSecurities
25	Recorded Basis	Concept (xbrli:monetary)	instant	debit	base:EquityMethodInvestments
26	Cash and cash equivalents	Concept (xbrli:monetary)	instant	debit	base:CashAndCashEquivalentsAtCarryingValue
27	Short-term Investments	Concept (xbrli:monetary)	instant	debit	base:AvailableForSaleSecuritiesCurrent
28	Equity and Other Investments	Concept (xbrli:monetary)	instant	debit	base:LongTermInvestments

Model Structure
Network	100590 - Disclosure - Investments - Cost Method - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureInvestmentsCostMethodAdditionalInformationDetail)
Table	Investments Debt And Equity Securities [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Investments Debt And Equity Securities [Abstract]	Abstract	duration	null	base:InvestmentsDebtAndEquitySecuritiesAbstract
2	Schedule of Cost method Investments [Table]	Table	duration	null	base:ScheduleOfCostMethodInvestmentsTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Fair Value by Measurement Frequency	Axis	duration	null	base:FairValueByMeasurementFrequencyAxis
6	Fair Value, Measurement Frequency [Domain]	Member	duration	null	base:FairValueMeasurementFrequencyDomain
7	Fair Value, Measurements, Nonrecurring	Member	duration	null	base:FairValueMeasurementsNonrecurringMember
8	Schedule of Cost-method Investments [Line Items]	LineItems	duration	null	base:ScheduleOfCostMethodInvestmentsLineItems
9	Recorded basis of common and preferred stock that are restricted for more than one year or are not publicly traded	Concept (xbrli:monetary)	instant	debit	base:CostMethodInvestments

Model Structure
Network	100600 - Disclosure - Investments - Secured Borrowings and Loaned Securities - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureInvestmentsSecuredBorrowingsAndLoanedSecuritiesAdditionalInformationDetail)
Table	Investments Debt And Equity Securities [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Investments Debt And Equity Securities [Abstract]	Abstract	duration	null	base:InvestmentsDebtAndEquitySecuritiesAbstract
2	Investment [Table]	Table	duration	null	invest:InvestmentTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Schedule of Investment Income, Reported Amounts, by Category	Axis	duration	null	base:InvestmentTypeAxis
6	Investments [Domain]	Member	duration	null	base:InvestmentTypeCategorizationMember
7	U.S. Government and Agency Securities	Member	duration	null	base:USGovernmentAgenciesDebtSecuritiesMember
8	Cash	Member	duration	null	base:CashMember
9	Investment [Line Items]	LineItems	duration	null	invest:InvestmentLineItems
10	Collateral received	Concept (xbrli:monetary)	instant	debit	base:SecuritiesReceivedAsCollateral

Model Structure
Network	100610 - Disclosure - Unrealized Losses on Investments (Detail) (http://www.xbrlsite.com/msft/role/DisclosureUnrealizedLossesOnInvestmentsDetail)
Table	Investments Debt And Equity Securities [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Investments Debt And Equity Securities [Abstract]	Abstract	duration	null	base:InvestmentsDebtAndEquitySecuritiesAbstract
2	Investments, Unrealized Loss Position [Table]	Table	duration	null	msft:InvestmentsUnrealizedLossPositionTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Schedule of Available for sale Securities, Major Types of Debt and Equity Securities	Axis	duration	null	base:MajorTypesOfDebtAndEquitySecuritiesAxis
6	Major Types of Debt and Equity Securities [Domain]	Member	duration	null	base:MajorTypesOfDebtAndEquitySecuritiesDomain
7	U.S. government and agency securities	Member	duration	null	base:USGovernmentAgenciesDebtSecuritiesMember
8	Foreign government bonds	Member	duration	null	base:ForeignGovernmentDebtSecuritiesMember
9	Mortgage- and asset-backed securities	Member	duration	null	base:AssetBackedSecuritiesMember
10	Corporate notes and bonds	Member	duration	null	base:CorporateDebtSecuritiesMember
11	Common and preferred stock	Member	duration	null	base:EquitySecuritiesMember
12	Unrealized Losses on Investments [Line Items]	LineItems	duration	null	msft:InvestmentsUnrealizedLossPositionLineItems
13	Less than 12 Months - Fair Value	Concept (xbrli:monetary)	instant	debit	base:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
14	Less than 12 Months - Unrealized Losses	Concept (xbrli:monetary)	instant	debit	base:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
15	12 Months or Greater - Fair Value	Concept (xbrli:monetary)	instant	debit	base:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
16	12 Months or Greater - Unrealized Losses	Concept (xbrli:monetary)	instant	debit	base:AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
17	Total Fair Value	Concept (xbrli:monetary)	instant	debit	base:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue
18	Total Unrealized Losses	Concept (xbrli:monetary)	instant	debit	base:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss

Model Structure
Network	100620 - Disclosure - Debt Investment Maturities (Detail) (http://www.xbrlsite.com/msft/role/DisclosureDebtInvestmentMaturitiesDetail)
Table	Investments Debt And Equity Securities [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Investments Debt And Equity Securities [Abstract]	Abstract	duration	null	base:InvestmentsDebtAndEquitySecuritiesAbstract
2	Investments Classified by Contractual Maturity Date [Table]	Table	duration	null	msft:InvestmentsClassifiedByContractualMaturityDateTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Investments Classified by Contractual Maturity Date [Line Items]	LineItems	duration	null	msft:InvestmentsClassifiedByContractualMaturityDateLineItems
6	Cost Basis	Abstract	duration	null	base:AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostBasisRollingMaturityAbstract
7	Due in one year or less	Concept (xbrli:monetary)	instant	debit	base:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis
8	Due after one year through five years	Concept (xbrli:monetary)	instant	debit	base:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis
9	Due after five years through 10 years	Concept (xbrli:monetary)	instant	debit	base:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis
10	Due after 10 years	Concept (xbrli:monetary)	instant	debit	base:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis
11	Total	Concept (xbrli:monetary)	instant	debit	base:AvailableForSaleDebtSecuritiesAmortizedCostBasis
12	Estimated Fair Value	Abstract	duration	null	base:AvailableForSaleSecuritiesDebtMaturitiesFairValueRollingMaturityAbstract
13	Due in one year or less	Concept (xbrli:monetary)	instant	debit	base:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue
14	Due after one year through five years	Concept (xbrli:monetary)	instant	debit	base:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue
15	Due after five years through 10 years	Concept (xbrli:monetary)	instant	debit	base:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue
16	Due after 10 years	Concept (xbrli:monetary)	instant	debit	base:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue
17	Total	Concept (xbrli:monetary)	instant	debit	base:AvailableForSaleSecuritiesDebtSecurities

Model Structure
Network	100630 - Disclosure - Derivatives - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureDerivativesAdditionalInformationDetail)
Table	Derivative Instruments And Hedging Activities Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Derivative Instruments And Hedging Activities Disclosure [Abstract]	Abstract	duration	null	base:DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
2	Derivative [Table]	Table	duration	null	base:DerivativeTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Position [Axis]	Axis	duration	null	base:PositionAxis
6	Position [Domain]	Member	duration	null	base:PositionDomain
7	Derivatives Sold	Member	duration	null	base:ShortMember
8	Derivatives Purchased	Member	duration	null	base:LongMember
9	Hedging Relationship [Axis]	Axis	duration	null	base:DerivativeInstrumentsGainLossByHedgingRelationshipAxis
10	Hedging Relationship [Domain]	Member	duration	null	base:HedgingRelationshipDomain
11	Cash flow hedging	Member	duration	null	base:CashFlowHedgingMember
12	Fair value hedging	Member	duration	null	base:FairValueHedgingMember
13	Derivative Instrument [Axis]	Axis	duration	null	base:DerivativeInstrumentRiskAxis
14	Derivative Contract [Domain]	Member	duration	null	base:DerivativeContractTypeDomain
15	Foreign Exchange Contracts	Member	duration	null	base:ForeignExchangeContractMember
16	Equity Contracts	Member	duration	null	base:EquityContractMember
17	Interest Rate Contracts	Member	duration	null	base:InterestRateContractMember
18	Mortgage-backed securities	Member	duration	null	base:MortgageBackedSecuritiesMember
19	Credit Contracts	Member	duration	null	base:CreditRiskContractMember
20	Commodity Contracts	Member	duration	null	base:CommodityContractMember
21	Hedging Designation	Axis	duration	null	base:HedgingDesignationAxis
22	Hedging Designation [Domain]	Member	duration	null	base:HedgingDesignationDomain
23	Non-designated Hedge Derivatives	Member	duration	null	base:NondesignatedMember
24	Designated Hedge Derivatives	Member	duration	null	base:DesignatedAsHedgingInstrumentMember
25	Long-term Debt, Type	Axis	duration	null	base:LongtermDebtTypeAxis
26	Long term Debt, Type [Domain]	Member	duration	null	base:LongtermDebtTypeDomain
27	Senior Unsecured Obligations	Member	duration	null	base:UnsecuredDebtMember
28	Derivative [Line Items]	LineItems	duration	null	base:DerivativeLineItems
29	Maximum length of time hedged in cash flow hedge	Concept (duration)	duration	null	base:MaximumLengthOfTimeForeignCurrencyCashFlowHedge
30	Notional amounts	Concept (xbrli:monetary)	instant	null	invest:DerivativeNotionalAmount
31	Minimum required liquidity under certain counterparty agreements	Concept (xbrli:monetary)	duration	debit	msft:FinancialInstrumentCovenantMinimumLiquidityRequirement
32	Debt instrument credit rating	Concept (string)	duration	null	base:DebtInstrumentCreditRating
33	Minimum liquidity for the period as defined by certain counterparty agreements	Concept (xbrli:monetary)	instant	debit	msft:FinancialInstrumentCovenantMinimumLiquidity
34	Estimated derivative net gains (losses) included in AOCI that will be reclassified into earnings within 12 months	Concept (xbrli:monetary)	instant	credit	base:ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months

Model Structure
Network	100640 - Disclosure - Fair Values of Derivative Instruments (Detail) (http://www.xbrlsite.com/msft/role/DisclosureFairValuesOfDerivativeInstrumentsDetail)
Table	Derivative Instruments And Hedging Activities Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Derivative Instruments And Hedging Activities Disclosure [Abstract]	Abstract	duration	null	base:DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
2	Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]	Table	duration	null	base:FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Hedging Designation	Axis	duration	null	base:HedgingDesignationAxis
6	Hedging Designation [Domain]	Member	duration	null	base:HedgingDesignationDomain
7	Non-designated Hedge Derivatives	Member	duration	null	base:NondesignatedMember
8	Designated Hedge Derivatives	Member	duration	null	base:DesignatedAsHedgingInstrumentMember
9	Derivatives, Fair Value, by Balance Sheet Location	Axis	duration	null	base:BalanceSheetLocationAxis
10	Balance Sheet Location [Domain]	Member	duration	null	base:BalanceSheetLocationDomain
11	Short-term Investments	Member	duration	null	base:ShortTermInvestmentsMember
12	Other Current Assets	Member	duration	null	base:OtherCurrentAssetsMember
13	Equity and Other Investments	Member	duration	null	msft:EquityAndOtherInvestmentsMember
14	Other Long-term Assets	Member	duration	null	base:OtherNoncurrentAssetsMember
15	Other Current Liabilities	Member	duration	null	base:OtherCurrentLiabilitiesMember
16	Other Long-term Liabilities	Member	duration	null	base:OtherNoncurrentLiabilitiesMember
17	Derivative Instrument [Axis]	Axis	duration	null	base:DerivativeInstrumentRiskAxis
18	Derivative Contract [Domain]	Member	duration	null	base:DerivativeContractTypeDomain
19	Foreign Exchange Contracts	Member	duration	null	base:ForeignExchangeContractMember
20	Equity Contracts	Member	duration	null	base:EquityContractMember
21	Interest Rate Contracts	Member	duration	null	base:InterestRateContractMember
22	Credit Contracts	Member	duration	null	base:CreditRiskContractMember
23	Balance Sheet Offsetting Eligibility [Axis]	Axis	duration	null	msft:BalanceSheetOffsettingEligibilityAxis
24	Balance Sheet Offsetting Eligibility [Domain]	Member	duration	null	msft:BalanceSheetOffsettingEligibilityDomain
25	Eligible for Offsetting	Member	duration	null	msft:EligibleForOffsettingMember
26	Derivatives, Fair Value [Line Items]	LineItems	duration	null	base:DerivativesFairValueLineItems
27	Derivative Assets	Concept (xbrli:monetary)	instant	debit	base:DerivativeFairValueOfDerivativeAsset
28	Gross amounts of derivatives offset on the balance sheet, assets	Concept (xbrli:monetary)	instant	credit	base:DerivativeAssetFairValueGrossLiability
29	Net amounts presented on the balance sheet, assets	Concept (xbrli:monetary)	instant	debit	msft:DerivativeAssetsNetAmountsPresentedInBalanceSheet
30	Gross amounts of derivatives not offset on the balance sheet, assets	Concept (xbrli:monetary)	instant	debit	msft:DerivativeFairValueOfDerivativeAssetAmountNotOffset
31	Cash collateral received, assets	Concept (xbrli:monetary)	instant	debit	base:DerivativeCollateralRightToReclaimCash
32	Net amount, assets	Concept (xbrli:monetary)	instant	debit	msft:DerivativeAssetsPotentialNetAmountsNotPresentedInBalanceSheet
33	Derivative Liabilities	Concept (xbrli:monetary)	instant	credit	base:DerivativeFairValueOfDerivativeLiability
34	Gross amounts of derivatives offset on the balance sheet, liabilities	Concept (xbrli:monetary)	instant	debit	base:DerivativeLiabilityFairValueGrossAsset
35	Net amounts presented on the balance sheet, liabilities	Concept (xbrli:monetary)	instant	credit	msft:DerivativeLiabilitiesNetAmountsPresentedInBalanceSheet
36	Gross amounts of derivatives not offset on the balance sheet, liabilities	Concept (xbrli:monetary)	instant	credit	msft:DerivativeFairValueOfDerivativeLiabilityAmountNotOffset
37	Cash collateral received, liabilities	Concept (xbrli:monetary)	instant	credit	base:DerivativeCollateralObligationToReturnCash
38	Net amount, liabilities	Concept (xbrli:monetary)	instant	credit	msft:DerivativeLiabilitiesPotentialNetAmountsNotPresentedInBalanceSheet

Model Structure
Network	100650 - Disclosure - Gains (Losses) on Fair Value Hedges and Related Hedged Items (Detail) (http://www.xbrlsite.com/msft/role/DisclosureGainsLossesOnFairValueHedgesAndRelatedHedgedItemsDetail)
Table	Derivative Instruments And Hedging Activities Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Derivative Instruments And Hedging Activities Disclosure [Abstract]	Abstract	duration	null	base:DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
2	Derivative Instruments, Gain (Loss) [Table]	Table	duration	null	base:DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Derivative Instrument [Axis]	Axis	duration	null	base:DerivativeInstrumentRiskAxis
6	Derivative Contract [Domain]	Member	duration	null	base:DerivativeContractTypeDomain
7	Foreign Exchange Contracts	Member	duration	null	base:ForeignExchangeContractMember
8	Equity Contracts	Member	duration	null	base:EquityContractMember
9	Derivative Instruments, Gain (Loss) [Line Items]	LineItems	duration	null	base:DerivativeInstrumentsGainLossLineItems
10	Derivatives	Concept (xbrli:monetary)	duration	credit	base:ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1
11	Hedged items	Concept (xbrli:monetary)	duration	credit	base:ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1
12	Total amount of ineffectiveness	Concept (xbrli:monetary)	duration	credit	base:GainLossOnFairValueHedgeIneffectivenessNet
13	Amount of equity contracts excluded from effectiveness assessment	Concept (xbrli:monetary)	duration	credit	base:GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet

Model Structure
Network	100660 - Disclosure - Gains (Losses) Related to Cash Flow Hedges (Detail) (http://www.xbrlsite.com/msft/role/DisclosureGainsLossesRelatedToCashFlowHedgesDetail)
Table	Derivative Instruments And Hedging Activities Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Derivative Instruments And Hedging Activities Disclosure [Abstract]	Abstract	duration	null	base:DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
2	Derivative Instruments, Gain (Loss) [Table]	Table	duration	null	base:DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Hedging Designation	Axis	duration	null	base:HedgingDesignationAxis
6	Hedging Designation [Domain]	Member	duration	null	base:HedgingDesignationDomain
7	Designated Hedge Derivatives	Member	duration	null	base:DesignatedAsHedgingInstrumentMember
8	Derivative Instrument [Axis]	Axis	duration	null	base:DerivativeInstrumentRiskAxis
9	Derivative Contract [Domain]	Member	duration	null	base:DerivativeContractTypeDomain
10	Foreign Exchange Contracts	Member	duration	null	base:ForeignExchangeContractMember
11	Derivative Instruments, Gain (Loss) [Line Items]	LineItems	duration	null	base:DerivativeInstrumentsGainLossLineItems
12	Effective Portion	Concept (string)	duration	null	msft:GainLossOnCashFlowHedgeEffectivenessNetAbstract
13	Gains recognized in other comprehensive income (net of tax effects of $4, $24 and $35)	Concept (xbrli:monetary)	duration	credit	base:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax
14	Gains reclassified from accumulated other comprehensive income into revenue	Concept (xbrli:monetary)	duration	credit	base:ForeignCurrencyCashFlowHedgeGainLossReclassifiedToEarningsNet
15	Amount Excluded from Effectiveness Assessment and Ineffective Portion	Abstract	duration	null	base:DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNetAbstract
16	Losses recognized in other income (expense), net	Concept (xbrli:monetary)	duration	credit	base:DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet

Model Structure
Network	100670 - Disclosure - Gains (Losses) Related to Cash Flow Hedges (Parenthetical) (Detail) (http://www.xbrlsite.com/msft/role/DisclosureGainsLossesRelatedToCashFlowHedgesParentheticalDetail)
Table	Derivative Instruments And Hedging Activities Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Derivative Instruments And Hedging Activities Disclosure [Abstract]	Abstract	duration	null	base:DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
2	Derivative Instruments, Gain (Loss) [Table]	Table	duration	null	base:DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Hedging Designation	Axis	duration	null	base:HedgingDesignationAxis
6	Hedging Designation [Domain]	Member	duration	null	base:HedgingDesignationDomain
7	Designated Hedge Derivatives	Member	duration	null	base:DesignatedAsHedgingInstrumentMember
8	Derivative Instrument [Axis]	Axis	duration	null	base:DerivativeInstrumentRiskAxis
9	Derivative Contract [Domain]	Member	duration	null	base:DerivativeContractTypeDomain
10	Foreign Exchange Contracts	Member	duration	null	base:ForeignExchangeContractMember
11	Derivative Instruments, Gain (Loss) [Line Items]	LineItems	duration	null	base:DerivativeInstrumentsGainLossLineItems
12	Gains (losses) recognized in other comprehensive income, tax effects	Concept (xbrli:monetary)	duration	debit	base:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax

Model Structure
Network	100680 - Disclosure - Non-Designated Derivative Gains (Losses) (Detail) (http://www.xbrlsite.com/msft/role/DisclosureNonDesignatedDerivativeGainsLossesDetail)
Table	Derivative Instruments And Hedging Activities Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Derivative Instruments And Hedging Activities Disclosure [Abstract]	Abstract	duration	null	base:DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
2	Derivative Instruments, Gain (Loss) [Table]	Table	duration	null	base:DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Derivative Instrument [Axis]	Axis	duration	null	base:DerivativeInstrumentRiskAxis
6	Derivative Contract [Domain]	Member	duration	null	base:DerivativeContractTypeDomain
7	Foreign Exchange Contracts	Member	duration	null	base:ForeignExchangeContractMember
8	Equity Contracts	Member	duration	null	base:EquityContractMember
9	Interest Rate Contracts	Member	duration	null	base:InterestRateContractMember
10	Credit Contracts	Member	duration	null	base:CreditRiskContractMember
11	Commodity Contracts	Member	duration	null	base:CommodityContractMember
12	Derivative Instruments, Gain (Loss) [Line Items]	LineItems	duration	null	base:DerivativeInstrumentsGainLossLineItems
13	Changes in fair value of derivatives not designated as hedges	Concept (xbrli:monetary)	duration	credit	base:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet

Model Structure
Network	100690 - Disclosure - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (http://www.xbrlsite.com/msft/role/DisclosureFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetail)
Table	Fair Value Disclosures [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Fair Value Disclosures [Abstract]	Abstract	duration	null	base:FairValueDisclosuresAbstract
2	Fair Value Measurements, Recurring and Nonrecurring [Table]	Table	duration	null	base:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Liability Class [Axis]	Axis	duration	null	base:FairValueByLiabilityClassAxis
6	Fair Value by Liability Class [Domain]	Member	duration	null	base:FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain
7	Derivatives and other	Member	duration	null	base:DerivativeFinancialInstrumentsLiabilitiesMember
8	Right Of Offset And Netting [Axis]	Axis	duration	null	msft:RightOfOffsetAndNettingAxis
9	Right Of Offset And Netting [Domain]	Member	duration	null	msft:RightOfOffsetAndNettingDomain
10	Gross	Member	duration	null	msft:GrossMember
11	Netting	Member	duration	null	msft:NettingMember
12	Net	Member	duration	null	msft:NetMember
13	Fair Value by Asset Class	Axis	duration	null	base:FairValueByAssetClassAxis
14	Asset Class [Domain]	Member	duration	null	base:FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain
15	Mutual funds	Member	duration	null	base:MoneyMarketFundsMember
16	Commercial paper	Member	duration	null	base:CommercialPaperMember
17	Certificates of deposit	Member	duration	null	base:CertificatesOfDepositMember
18	U.S. government and agency securities	Member	duration	null	base:USGovernmentAgenciesDebtSecuritiesMember
19	Foreign government bonds	Member	duration	null	base:ForeignGovernmentDebtSecuritiesMember
20	Mortgage- and asset-backed securities	Member	duration	null	base:AssetBackedSecuritiesMember
21	Corporate notes and bonds	Member	duration	null	base:CorporateDebtSecuritiesMember
22	Municipal securities	Member	duration	null	base:USStatesAndPoliticalSubdivisionsMember
23	Common and preferred stock	Member	duration	null	base:EquitySecuritiesMember
24	Derivatives	Member	duration	null	base:DerivativeFinancialInstrumentsAssetsMember
25	Fair Value, Hierarchy [Axis]	Axis	duration	null	base:FairValueByFairValueHierarchyLevelAxis
26	Fair Value Hierarchy [Domain]	Member	duration	null	base:FairValueMeasurementsFairValueHierarchyDomain
27	Level 1	Member	duration	null	base:FairValueInputsLevel1Member
28	Level 2	Member	duration	null	base:FairValueInputsLevel2Member
29	Level 3	Member	duration	null	base:FairValueInputsLevel3Member
30	Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	LineItems	duration	null	base:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
31	Assets	Concept (xbrli:monetary)	instant	debit	base:AssetsFairValueDisclosureRecurring
32	Liabilities	Concept (xbrli:monetary)	instant	credit	base:LiabilitiesFairValueDisclosureRecurring

Model Structure
Network	100700 - Disclosure - Reconciliation of Total Assets Measured at Fair Value on Recurring Basis to Balance Sheet Presentation (Detail) (http://www.xbrlsite.com/msft/role/DisclosureReconciliationOfTotalAssetsMeasuredAtFairValueOnRecurringBasisToBalanceSheetPresentationDetail)
Table	Fair Value Disclosures [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Fair Value Disclosures [Abstract]	Abstract	duration	null	base:FairValueDisclosuresAbstract
2	Fair Value Measurements, Recurring and Nonrecurring [Table]	Table	duration	null	base:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Fair Value by Measurement Frequency	Axis	duration	null	base:FairValueByMeasurementFrequencyAxis
6	Fair Value, Measurement Frequency [Domain]	Member	duration	null	base:FairValueMeasurementFrequencyDomain
7	Fair Value, Measurements, Recurring	Member	duration	null	base:FairValueMeasurementsRecurringMember
8	Fair Value, Measurements, Nonrecurring	Member	duration	null	base:FairValueMeasurementsNonrecurringMember
9	Derivatives, Fair Value, by Balance Sheet Location	Axis	duration	null	base:BalanceSheetLocationAxis
10	Balance Sheet Location [Domain]	Member	duration	null	base:BalanceSheetLocationDomain
11	Other Current and Long-term Assets	Member	duration	null	base:OtherAssetsMember
12	Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	LineItems	duration	null	base:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
13	Net fair value of assets measured at fair value on a recurring basis	Concept (xbrli:monetary)	instant	debit	base:AssetsFairValueDisclosureRecurring
14	Cash	Concept (xbrli:monetary)	instant	debit	base:Cash
15	Common and preferred stock measured at fair value on a nonrecurring basis	Concept (xbrli:monetary)	instant	debit	base:CostMethodInvestments
16	Other investments measured at fair value on a nonrecurring basis	Concept (xbrli:monetary)	instant	debit	base:EquityMethodInvestments
17	Less derivative net assets classified as other current and long-term assets	Concept (xbrli:monetary)	instant	debit	base:DerivativeAssets
18	Other	Concept (xbrli:monetary)	instant	debit	base:OtherAssetsFairValueDisclosure
19	Recorded basis of investment components	Concept (xbrli:monetary)	instant	debit	base:AvailableForSaleSecurities

Model Structure
Network	100710 - Disclosure - Components of Inventories (Detail) (http://www.xbrlsite.com/msft/role/DisclosureComponentsOfInventoriesDetail)
Table	Inventory Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Inventory Disclosure [Abstract]	Abstract	duration	null	base:InventoryDisclosureAbstract
2	Inventory, Current [Table]	Table	duration	null	base:InventoryCurrentTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Inventory [Line Items]	LineItems	duration	null	base:InventoryLineItems
6	Raw materials	Concept (xbrli:monetary)	instant	debit	base:InventoryRawMaterialsNetOfReserves
7	Work in process	Concept (xbrli:monetary)	instant	debit	base:InventoryWorkInProcessNetOfReserves
8	Finished goods	Concept (xbrli:monetary)	instant	debit	base:InventoryFinishedGoodsNetOfReserves
9	Total	Concept (xbrli:monetary)	instant	debit	base:InventoryNet

Model Structure
Network	100720 - Disclosure - Components of Property and Equipment (Detail) (http://www.xbrlsite.com/msft/role/DisclosureComponentsOfPropertyAndEquipmentDetail)
Table	Property Plant And Equipment [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Property Plant And Equipment [Abstract]	Abstract	duration	null	base:PropertyPlantAndEquipmentAbstract
2	Property, Plant and Equipment [Table]	Table	duration	null	base:ScheduleOfPropertyPlantAndEquipmentTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Property, Plant and Equipment [Line Items]	LineItems	duration	null	base:PropertyPlantAndEquipmentLineItems
6	Land	Concept (xbrli:monetary)	instant	debit	base:Land
7	Buildings and improvements	Concept (xbrli:monetary)	instant	debit	base:BuildingsAndImprovementsGross
8	Leasehold improvements	Concept (xbrli:monetary)	instant	debit	base:LeaseholdImprovementsGross
9	Computer equipment and software	Concept (xbrli:monetary)	instant	debit	msft:ComputerHardwareAndSoftware
10	Furniture and equipment	Concept (xbrli:monetary)	instant	debit	base:FurnitureAndFixturesGross
11	Total, at cost	Concept (xbrli:monetary)	instant	debit	base:PropertyPlantAndEquipmentGross
12	Accumulated depreciation	Concept (xbrli:monetary)	instant	credit	base:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
13	Total, net	Concept (xbrli:monetary)	instant	debit	base:PropertyPlantAndEquipmentNet

Model Structure
Network	100730 - Disclosure - Property and Equipment - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosurePropertyAndEquipmentAdditionalInformationDetail)
Table	Property Plant And Equipment [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Property Plant And Equipment [Abstract]	Abstract	duration	null	base:PropertyPlantAndEquipmentAbstract
2	Property, Plant and Equipment [Table]	Table	duration	null	base:ScheduleOfPropertyPlantAndEquipmentTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Property, Plant and Equipment [Line Items]	LineItems	duration	null	base:PropertyPlantAndEquipmentLineItems
6	Assets recorded under capital leases	Concept (xbrli:monetary)	instant	debit	base:CapitalLeasedAssetsGross
7	Accumulated depreciation associated with capital leases	Concept (xbrli:monetary)	instant	credit	base:CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation
8	Property and equipment acquired under capital leases	Concept (xbrli:monetary)	duration	credit	base:CapitalLeaseObligationsIncurred
9	Depreciation expense	Concept (xbrli:monetary)	duration	debit	base:Depreciation

Model Structure
Network	100740 - Disclosure - Business Combinations - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureBusinessCombinationsAdditionalInformationDetail)
Table	Business Combinations [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Business Combinations [Abstract]	Abstract	duration	null	base:BusinessCombinationsAbstract
2	Schedule of Business Acquisitions, by Acquisition [Table]	Table	duration	null	base:ScheduleOfBusinessAcquisitionsByAcquisitionTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Business Acquisition	Axis	duration	null	base:BusinessAcquisitionAxis
6	Business Acquisition, Acquiree	Member	duration	null	base:BusinessAcquisitionAcquireeDomain
7	LinkedIn Corporation	Member	duration	null	msft:LinkedInCorporationMember
8	Business Acquisition [Line Items]	LineItems	duration	null	base:BusinessAcquisitionLineItems
9	Acquisition date	Concept (date)	duration	null	base:BusinessAcquisitionEffectiveDateOfAcquisition1
10	Name of acquired entity	Concept (string)	duration	null	base:BusinessAcquisitionNameOfAcquiredEntity
11	Total purchase price	Concept (xbrli:monetary)	duration	credit	base:BusinessCombinationConsiderationTransferred1
12	Cash paid to acquire the business	Concept (xbrli:monetary)	duration	credit	base:PaymentsToAcquireBusinessesGross

Model Structure
Network	100750 - Disclosure - Major Classes of Assets and Liabilities to Which We Allocated the Purchase Price (Detail) (http://www.xbrlsite.com/msft/role/DisclosureMajorClassesOfAssetsAndLiabilitiesToWhichWeAllocatedPurchasePriceDetail)
Table	Business Combinations [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Business Combinations [Abstract]	Abstract	duration	null	base:BusinessCombinationsAbstract
2	Schedule of Business Acquisitions, by Acquisition [Table]	Table	duration	null	base:ScheduleOfBusinessAcquisitionsByAcquisitionTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Business Acquisition	Axis	duration	null	base:BusinessAcquisitionAxis
6	Business Acquisition, Acquiree	Member	duration	null	base:BusinessAcquisitionAcquireeDomain
7	LinkedIn Corporation	Member	duration	null	msft:LinkedInCorporationMember
8	Business Acquisition [Line Items]	LineItems	duration	null	base:BusinessAcquisitionLineItems
9	Cash and cash equivalents	Concept (xbrli:monetary)	instant	debit	base:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
10	Short-term investments	Concept (xbrli:monetary)	instant	debit	base:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsMarketableSecurities
11	Other current assets	Concept (xbrli:monetary)	instant	debit	base:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther
12	Property and equipment	Concept (xbrli:monetary)	instant	debit	base:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
13	Intangible assets	Concept (xbrli:monetary)	instant	debit	base:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
14	Goodwill	Concept (xbrli:monetary)	instant	debit	base:Goodwill
15	Short-term debt	Concept (xbrli:monetary)	instant	credit	msft:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesShortTermDebt
16	Other current liabilities	Concept (xbrli:monetary)	instant	credit	base:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther
17	Deferred income taxes	Concept (xbrli:monetary)	instant	credit	base:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent
18	Other	Concept (xbrli:monetary)	instant	credit	msft:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherLiabilitiesNet
19	Total purchase price	Concept (xbrli:monetary)	instant	debit	base:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet

Model Structure
Network	100760 - Disclosure - Major Classes of Assets and Liabilities to Which We Allocated the Purchase Price (Parenthetical) (Detail) (http://www.xbrlsite.com/msft/role/DisclosureMajorClassesOfAssetsAndLiabilitiesToWhichWeAllocatedPurchasePriceParentheticalDetail)
Table	Business Combinations [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Business Combinations [Abstract]	Abstract	duration	null	base:BusinessCombinationsAbstract
2	Schedule of Business Acquisitions, by Acquisition [Table]	Table	duration	null	base:ScheduleOfBusinessAcquisitionsByAcquisitionTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Business Acquisition	Axis	duration	null	base:BusinessAcquisitionAxis
6	Business Acquisition, Acquiree	Member	duration	null	base:BusinessAcquisitionAcquireeDomain
7	LinkedIn Corporation	Member	duration	null	msft:LinkedInCorporationMember
8	Business Acquisition [Line Items]	LineItems	duration	null	base:BusinessAcquisitionLineItems
9	Goodwill expected to be deductible for income tax purposes	Concept (xbrli:monetary)	instant	debit	base:BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount
10	Business combination, long-term debt	Concept (xbrli:monetary)	instant	credit	base:DebtInstrumentFaceAmount

Model Structure
Network	100770 - Disclosure - Acquired Intangible Assets (Detail) (http://www.xbrlsite.com/msft/role/DisclosureAcquiredIntangibleAssetsDetail)
Table	Business Combinations [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Business Combinations [Abstract]	Abstract	duration	null	base:BusinessCombinationsAbstract
2	Finite Lived Intangible Assets Acquired as Part of Business Combination [Table]	Table	duration	null	base:FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Business Acquisition	Axis	duration	null	base:BusinessAcquisitionAxis
6	Business Acquisition, Acquiree	Member	duration	null	base:BusinessAcquisitionAcquireeDomain
7	LinkedIn Corporation	Member	duration	null	msft:LinkedInCorporationMember
8	Finite Lived Intangible Assets by Major Class [Axis]	Axis	duration	null	base:FiniteLivedIntangibleAssetsByMajorClassAxis
9	Finite Lived Intangible Assets, Major Class Name [Domain]	Member	duration	null	base:FiniteLivedIntangibleAssetsMajorClassNameDomain
10	Customer-related	Member	duration	null	base:CustomerRelationshipsMember
11	Marketing-related (trade names)	Member	duration	null	base:MarketingRelatedIntangibleAssetsMember
12	Technology-based	Member	duration	null	base:TechnologyBasedIntangibleAssetsMember
13	Contract-based	Member	duration	null	base:ContractualRightsMember
14	Acquired Finite-Lived Intangible Assets [Line Items]	LineItems	duration	null	base:AcquiredFiniteLivedIntangibleAssetsLineItems
15	Fair value of intangible assets acquired	Concept (xbrli:monetary)	instant	debit	base:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
16	Weighted Average Life	Concept (duration)	duration	null	base:AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife

Model Structure
Network	100780 - Disclosure - Revenue and Operating Loss Attributable to Acquiree, Since the Date of Acquisition (Detail) (http://www.xbrlsite.com/msft/role/DisclosureRevenueAndOperatingLossAttributableToAcquireeSinceDateOfAcquisitionDetail)
Table	Business Combinations [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Business Combinations [Abstract]	Abstract	duration	null	base:BusinessCombinationsAbstract
2	Schedule of Business Acquisitions, by Acquisition [Table]	Table	duration	null	base:ScheduleOfBusinessAcquisitionsByAcquisitionTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Business Acquisition	Axis	duration	null	base:BusinessAcquisitionAxis
6	Business Acquisition, Acquiree	Member	duration	null	base:BusinessAcquisitionAcquireeDomain
7	LinkedIn Corporation	Member	duration	null	msft:LinkedInCorporationMember
8	Business Acquisition [Line Items]	LineItems	duration	null	base:BusinessAcquisitionLineItems
9	Revenue	Concept (xbrli:monetary)	duration	credit	base:BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual
10	Operating loss	Concept (xbrli:monetary)	duration	credit	base: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.xbrlsite.com/msft/role/DisclosureSupplementalConsolidatedFinancialResultsOnUnauditedProFormaBasisAsIfAcquisitionHadBeenConsummatedOnBeginningOfPeriodDetail)
Table	Business Combinations [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Business Combinations [Abstract]	Abstract	duration	null	base:BusinessCombinationsAbstract
2	Schedule of Business Acquisitions, by Acquisition [Table]	Table	duration	null	base:ScheduleOfBusinessAcquisitionsByAcquisitionTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Business Acquisition	Axis	duration	null	base:BusinessAcquisitionAxis
6	Business Acquisition, Acquiree	Member	duration	null	base:BusinessAcquisitionAcquireeDomain
7	LinkedIn Corporation	Member	duration	null	msft:LinkedInCorporationMember
8	Business Acquisition [Line Items]	LineItems	duration	null	base:BusinessAcquisitionLineItems
9	Revenue	Concept (xbrli:monetary)	duration	credit	base:BusinessAcquisitionsProFormaRevenue
10	Net income	Concept (xbrli:monetary)	duration	credit	base:BusinessAcquisitionsProFormaNetIncomeLoss
11	Diluted earnings per share	Concept (xbrli:decimalItemType)	duration	null	base:BusinessAcquisitionProFormaEarningsPerShareDiluted

Model Structure
Network	100800 - Disclosure - Carrying Amount of Goodwill (Detail) (http://www.xbrlsite.com/msft/role/DisclosureCarryingAmountOfGoodwillDetail)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Goodwill And Intangible Assets Disclosure [Abstract]	Abstract	duration	null	base:GoodwillAndIntangibleAssetsDisclosureAbstract
2	Schedule of Goodwill [Table]	Table	duration	null	base:ScheduleOfGoodwillTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement, Business Segments	Axis	duration	null	base:StatementBusinessSegmentsAxis
6	Segments [Domain]	Member	duration	null	base:SegmentDomain
7	Productivity and Business Processes	Member	duration	null	msft:ProductivityAndBusinessProcessesMember
8	Intelligent Cloud	Member	duration	null	msft:IntelligentCloudMember
9	More Personal Computing	Member	duration	null	msft:MorePersonalComputingMember
10	Goodwill [Line Items]	LineItems	duration	null	base:GoodwillLineItems
11	Beginning Balance	Concept (xbrli:monetary)	instant	debit	base:Goodwill
12	Acquisitions	Concept (xbrli:monetary)	duration	debit	base:GoodwillAcquiredDuringPeriod
13	Other	Concept (xbrli:monetary)	duration	debit	base:GoodwillOtherIncreaseDecrease
14	Ending Balance	Concept (xbrli:monetary)	instant	debit	base:Goodwill

Model Structure
Network	100810 - Disclosure - Goodwill - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureGoodwillAdditionalInformationDetail)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Goodwill And Intangible Assets Disclosure [Abstract]	Abstract	duration	null	base:GoodwillAndIntangibleAssetsDisclosureAbstract
2	Schedule of Goodwill [Table]	Table	duration	null	base:ScheduleOfGoodwillTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement, Business Segments	Axis	duration	null	base:StatementBusinessSegmentsAxis
6	Segments [Domain]	Member	duration	null	base:SegmentDomain
7	Phone Hardware	Member	duration	null	msft:PhoneHardwareMember
8	Goodwill [Line Items]	LineItems	duration	null	base:GoodwillLineItems
9	Accumulated goodwill impairment	Concept (xbrli:monetary)	instant	credit	base:GoodwillImpairedAccumulatedImpairmentLoss
10	Goodwill impairment charge	Concept (xbrli:monetary)	duration	debit	base:GoodwillImpairmentLoss

Model Structure
Network	100820 - Disclosure - Finite-Lived Intangible Assets (Detail) (http://www.xbrlsite.com/msft/role/DisclosureFiniteLivedIntangibleAssetsDetail)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Goodwill And Intangible Assets Disclosure [Abstract]	Abstract	duration	null	base:GoodwillAndIntangibleAssetsDisclosureAbstract
2	Schedule of Finite Lived Intangible Assets [Table]	Table	duration	null	base:ScheduleOfFiniteLivedIntangibleAssetsTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Finite Lived Intangible Assets by Major Class [Axis]	Axis	duration	null	base:FiniteLivedIntangibleAssetsByMajorClassAxis
6	Finite Lived Intangible Assets, Major Class Name [Domain]	Member	duration	null	base:FiniteLivedIntangibleAssetsMajorClassNameDomain
7	Technology-based	Member	duration	null	base:TechnologyBasedIntangibleAssetsMember
8	Marketing-related	Member	duration	null	base:MarketingRelatedIntangibleAssetsMember
9	Contract-based	Member	duration	null	base:ContractualRightsMember
10	Customer-related	Member	duration	null	base:CustomerRelationshipsMember
11	Finite-Lived Intangible Assets [Line Items]	LineItems	duration	null	base:FiniteLivedIntangibleAssetsLineItems
12	Gross Carrying Amount	Concept (xbrli:monetary)	instant	debit	base:FiniteLivedIntangibleAssetsGross
13	Accumulated Amortization	Concept (xbrli:monetary)	instant	credit	base:FiniteLivedIntangibleAssetsAccumulatedAmortization
14	Net Carrying Amount	Concept (xbrli:monetary)	instant	debit	base:FiniteLivedIntangibleAssetsNet

Model Structure
Network	100830 - Disclosure - Finite-Lived Intangible Assets (Parenthetical) (Detail) (http://www.xbrlsite.com/msft/role/DisclosureFiniteLivedIntangibleAssetsParentheticalDetail)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Goodwill And Intangible Assets Disclosure [Abstract]	Abstract	duration	null	base:GoodwillAndIntangibleAssetsDisclosureAbstract
2	Schedule of Finite Lived Intangible Assets [Table]	Table	duration	null	base:ScheduleOfFiniteLivedIntangibleAssetsTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Finite Lived Intangible Assets by Major Class [Axis]	Axis	duration	null	base:FiniteLivedIntangibleAssetsByMajorClassAxis
6	Finite Lived Intangible Assets, Major Class Name [Domain]	Member	duration	null	base:FiniteLivedIntangibleAssetsMajorClassNameDomain
7	Technology-based	Member	duration	null	base:TechnologyBasedIntangibleAssetsMember
8	Finite-Lived Intangible Assets [Line Items]	LineItems	duration	null	base:FiniteLivedIntangibleAssetsLineItems
9	Net carrying amount of software to be sold, leased, or otherwise marketed	Concept (xbrli:monetary)	instant	debit	base:CapitalizedSoftwareDevelopmentCostsForSoftwareSoldToCustomers

Model Structure
Network	100840 - Disclosure - Intangible Assets - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureIntangibleAssetsAdditionalInformationDetail)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Goodwill And Intangible Assets Disclosure [Abstract]	Abstract	duration	null	base:GoodwillAndIntangibleAssetsDisclosureAbstract
2	Schedule of Finite Lived Intangible Assets [Table]	Table	duration	null	base:ScheduleOfFiniteLivedIntangibleAssetsTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement, Business Segments	Axis	duration	null	base:StatementBusinessSegmentsAxis
6	Segments [Domain]	Member	duration	null	base:SegmentDomain
7	Devices	Member	duration	null	msft:DevicesMember
8	Phone Hardware	Member	duration	null	msft:PhoneHardwareMember
9	Finite-Lived Intangible Assets [Line Items]	LineItems	duration	null	base:FiniteLivedIntangibleAssetsLineItems
10	Impairment charges of intangible assets	Concept (xbrli:monetary)	duration	debit	base:ImpairmentOfIntangibleAssetsFinitelived
11	Intangible assets amortization expense	Concept (xbrli:monetary)	duration	debit	base:AmortizationOfIntangibleAssets
12	Amortization of capitalized software	Concept (xbrli:monetary)	duration	debit	base:CapitalizedComputerSoftwareAmortization1

Model Structure
Network	100850 - Disclosure - Intangible Assets Acquired (Detail) (http://www.xbrlsite.com/msft/role/DisclosureIntangibleAssetsAcquiredDetail)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Goodwill And Intangible Assets Disclosure [Abstract]	Abstract	duration	null	base:GoodwillAndIntangibleAssetsDisclosureAbstract
2	Schedule of Acquired Finite Lived Intangible Asset by Major Class [Table]	Table	duration	null	base:ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Finite Lived Intangible Assets by Major Class [Axis]	Axis	duration	null	base:FiniteLivedIntangibleAssetsByMajorClassAxis
6	Finite Lived Intangible Assets, Major Class Name [Domain]	Member	duration	null	base:FiniteLivedIntangibleAssetsMajorClassNameDomain
7	Customer-related	Member	duration	null	base:CustomerRelationshipsMember
8	Technology-based	Member	duration	null	base:TechnologyBasedIntangibleAssetsMember
9	Marketing-related	Member	duration	null	base:MarketingRelatedIntangibleAssetsMember
10	Contract-based	Member	duration	null	base:ContractualRightsMember
11	Acquired Finite-Lived Intangible Assets [Line Items]	LineItems	duration	null	base:AcquiredFiniteLivedIntangibleAssetsLineItems
12	Amount	Concept (xbrli:monetary)	duration	debit	msft:AcquiredFiniteLivedIntangibleAssets
13	Weighted Average Life	Concept (duration)	duration	null	base:AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife

Model Structure
Network	100860 - Disclosure - Estimated Future Amortization Expense Related to Intangible Assets (Detail) (http://www.xbrlsite.com/msft/role/DisclosureEstimatedFutureAmortizationExpenseRelatedToIntangibleAssetsDetail)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Goodwill And Intangible Assets Disclosure [Abstract]	Abstract	duration	null	base:GoodwillAndIntangibleAssetsDisclosureAbstract
2	Schedule of Finite Lived Intangible Assets [Table]	Table	duration	null	base:ScheduleOfFiniteLivedIntangibleAssetsTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Finite-Lived Intangible Assets [Line Items]	LineItems	duration	null	base:FiniteLivedIntangibleAssetsLineItems
6	Year Ending June 30, 2018	Concept (xbrli:monetary)	instant	debit	base:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
7	Year Ending June 30, 2019	Concept (xbrli:monetary)	instant	debit	base:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
8	Year Ending June 30, 2020	Concept (xbrli:monetary)	instant	debit	base:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
9	Year Ending June 30, 2021	Concept (xbrli:monetary)	instant	debit	base:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
10	Year Ending June 30, 2022	Concept (xbrli:monetary)	instant	debit	base:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
11	Thereafter	Concept (xbrli:monetary)	instant	debit	base:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
12	Net Carrying Amount	Concept (xbrli:monetary)	instant	debit	base:FiniteLivedIntangibleAssetsNet

Model Structure
Network	100870 - Disclosure - Debt - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureDebtAdditionalInformationDetail)
Table	Debt Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Debt Disclosure [Abstract]	Abstract	duration	null	base:DebtDisclosureAbstract
2	Schedule of Long term Debt Instruments [Table]	Table	duration	null	base:DebtInstrumentTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Short term Debt, Type [Axis]	Axis	duration	null	base:ShortTermDebtTypeAxis
6	Short term Debt, Type [Domain]	Member	duration	null	base:ShortTermDebtTypeDomain
7	Commercial paper	Member	duration	null	base:CommercialPaperMember
8	Range	Axis	duration	null	base:RangeAxis
9	Range [Domain]	Member	duration	null	base:RangeMember
10	Lower Limit	Member	duration	null	base:MinimumMember
11	Upper Limit	Member	duration	null	base:MaximumMember
12	Debt Instrument	Axis	duration	null	base:DebtInstrumentAxis
13	Debt Instrument, Name [Domain]	Member	duration	null	base:DebtInstrumentNameDomain
14	Credit Facility Expire on October 31st 2017	Member	duration	null	msft:CreditFacilityExpireOnOctoberThirtyOneTwentySeventeenMember
15	Credit Facility Expire on November 14th 2018	Member	duration	null	msft:CreditFacilityExpireOnNovemberFourteenTwentyEighteenMember
16	Debt Instrument [Line Items]	LineItems	duration	null	base:DebtInstrumentLineItems
17	Commercial paper	Concept (xbrli:monetary)	instant	credit	base:CommercialPaper
18	Commercial paper, weighted average interest rate	Concept (xbrli:pureItemType)	instant	null	base:ShortTermDebtWeightedAverageInterestRate
19	Commercial paper, maturity term	Concept (duration)	duration	null	base:DebtInstrumentTerm
20	Credit facility	Concept (xbrli:monetary)	instant	credit	base:LineOfCreditFacilityMaximumBorrowingCapacity
21	Credit facility, expiration date	Concept (date)	duration	null	base:LineOfCreditFacilityExpirationDate1
22	Credit facility, financial covenant	Concept (string)	duration	null	base:LineOfCreditFacilityCovenantCompliance
23	Credit facility, drawn	Concept (xbrli:monetary)	duration	debit	base:ProceedsFromLinesOfCredit
24	Long-term debt	Concept (xbrli:monetary)	instant	credit	base:LongTermDebt
25	Long-term debt fair value	Concept (xbrli:monetary)	instant	credit	base:LongTermDebtFairValue
26	Cash paid for interest	Concept (xbrli:monetary)	duration	credit	base:InterestPaid
27	Unamortized discount and debt issuance costs	Concept (xbrli:monetary)	instant	debit	base:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

Model Structure
Network	100880 - Disclosure - Long-term Debt (Detail) (http://www.xbrlsite.com/msft/role/DisclosureLongTermDebtDetail)
Table	Debt Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Debt Disclosure [Abstract]	Abstract	duration	null	base:DebtDisclosureAbstract
2	Schedule of Long term Debt Instruments [Table]	Table	duration	null	base:DebtInstrumentTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Debt Instrument	Axis	duration	null	base:DebtInstrumentAxis
6	Debt Instrument, Name [Domain]	Member	duration	null	base:DebtInstrumentNameDomain
7	Notes 0.875 Percent Due November 15th 2017	Member	duration	null	msft:NotesZeroPointEightSevenFivePercentDueNovemberFifteenTwentySeventeenMember
8	Notes 1.0 Percent Due May 1st 2018	Member	duration	null	msft:NotesOnePointZeroPercentDueMayOneTwentyEighteenMember
9	Notes 1.30 Percent Due November 3rd 2018	Member	duration	null	msft:NotesOnePointThreeZeroPercentDueNovemberThreeTwentyEighteenMember
10	Notes 1.625 Percent Due December 6th 2018	Member	duration	null	msft:NotesOnePointSixTwoFivePercentDueDecemberSixTwentyEighteenMember
11	Notes 4.2 Percent Due June 1st 2019	Member	duration	null	msft:NotesFourPointTwoPercentDueJuneOneTwentyNineteenMember
12	Notes 1.1 Percent Due August 8th 2019	Member	duration	null	msft:NotesOnePointOnePercentDueAugustEightTwentyNineteenMember
13	Notes 0.500 Percent Due November 1st 2019	Member	duration	null	msft:NotesZeroPointFivePercentDueNovemberOneTwentyNineteenMember
14	Notes 1.850 Percent Due February 6th 2020	Member	duration	null	msft:NotesOnePointEightFivePercentDueFebruarySixTwentyTwentyMember
15	Notes 1.850 Percent Due February 12th 2020	Member	duration	null	msft:NotesOnePointEightFivePercentDueFebruaryTwelveTwentyTwentyMember
16	Notes 3.0 Percent Due October 1st 2020	Member	duration	null	msft:NotesThreePointZeroPercentDueOctoberOneTwentyTwentyMember
17	Notes 2.0 Percent Due November 3rd 2020	Member	duration	null	msft:NotesTwoPointZeroPercentDueNovemberThreeTwentyTwentyMember
18	Notes 4.0 Percent Due February 8th 2021	Member	duration	null	msft:NotesFourPointZeroPercentDueFebruaryEightTwentyTwentyOneMember
19	Notes 1.55 Percent Due August 8th 2021	Member	duration	null	msft:NotesOnePointFiveFivePercentDueAugustEightTwentyTwentyOneMember
20	Notes 2.125 Percent Due December 6th 2021	Member	duration	null	msft:NotesTwoPointOneTwoFivePercentDueDecemberSixTwentyTwentyOneMember
21	Notes 2.40 Percent Due February 6th 2022	Member	duration	null	msft:NotesTwoPointFourPercentDueFebruarySixTwentyTwentyTwoMember
22	Notes 2.375 Percent Due February 12th 2022	Member	duration	null	msft:NotesTwoPointThreeSevenFivePercentDueFebruaryTwelveTwentyTwentyTwoMember
23	Notes 2.65 Percent Due November 3rd 2022	Member	duration	null	msft:NotesTwoPointSixFivePercentDueNovemberThreeTwentyTwentyTwoMember
24	Notes 2.125 Percent Due November 15th 2022	Member	duration	null	msft:NotesTwoPointOneTwoFivePercentDueNovemberFifteenTwentyTwentyTwoMember
25	Notes 2.375 Percent Due May 1st 2023	Member	duration	null	msft:NotesTwoPointThreeSevenFivePercentDueMayOneTwentyTwentyThreeMember
26	Notes 2.0 Percent Due August 8th 2023	Member	duration	null	msft:NotesTwoPointZeroPercentDueAugustEightTwentyTwentyThreeMember
27	Notes 3.625 Percent Due December 15th 2023	Member	duration	null	msft:NotesThreePointSixTwoFivePercentDueDecemberFifteenTwentyTwentyThreeMember
28	Notes 2.875 Percent Due February 6th 2024	Member	duration	null	msft:NotesTwoPointEightSevenFivePercentDueFebruarySixTwentyTwentyFourMember
29	Notes 2.70 Percent Due February 12th 2025	Member	duration	null	msft:NotesTwoPointSevenPercentDueFebruaryTwelveTwentyTwentyFiveMember
30	Notes 3.125 Percent Due November 3rd 2025	Member	duration	null	msft:NotesThreePointOneTwoFivePercentDueNovemberThreeTwentyTwentyFiveMember
31	Notes 2.4 Percent Due August 8th 2026	Member	duration	null	msft:NotesTwoPointFourPercentDueAugustEightTwentyTwentySixMember
32	Notes 3.3 Percent Due February 6th 2027	Member	duration	null	msft:NotesThreePointThreePercentDueFebruarySixTwentyTwentySevenMember
33	Notes 3.125 Percent Due December 6th 2028	Member	duration	null	msft:NotesThreePointOneTwoFivePercentDueDecemberSixTwentyTwentyEightMember
34	Notes 2.625 Percent Due May 2nd 2033	Member	duration	null	msft:NotesTwoPointSixTwoFivePercentDueMayTwoTwentyThirtyThreeMember
35	Notes 3.50 Percent Due February 12th 2035	Member	duration	null	msft:NotesThreePointFivePercentDueFebruaryTwelveTwentyThirtyFiveMember
36	Notes 4.2 Percent Due November 3rd 2035	Member	duration	null	msft:NotesFourPointTwoPercentDueNovemberThreeTwentyThirtyFiveMember
37	Notes 3.45 Percent Due August 8th 2036	Member	duration	null	msft:NotesThreePointFourFivePercentDueAugustEightTwentyThirtySixMember
38	Notes 4.1 Percent Due February 6th 2037	Member	duration	null	msft:NotesFourPointOnePercentDueFebruarySixTwentyThirtySevenMember
39	Notes 5.2 Percent Due June 1st 2039	Member	duration	null	msft:NotesFivePointTwoPercentDueJuneOneTwentyThirtyNineMember
40	Notes 4.5 Percent Due October 1st 2040	Member	duration	null	msft:NotesFourPointFivePercentDueOctoberOneTwentyFortyMember
41	Notes 5.3 Percent Due February 8th 2041	Member	duration	null	msft:NotesFivePointThreePercentDueFebruaryEightTwentyFortyOneMember
42	Notes 3.5 Percent Due November 15th 2042	Member	duration	null	msft:NotesThreePointFivePercentDueNovemberFifteenTwentyFortyTwoMember
43	Notes 3.750 Percent Due May 1st 2043	Member	duration	null	msft:NotesThreePointSevenFivePercentDueMayOneTwentyFortyThreeMember
44	Notes 4.875 Percent Due December 15th 2043	Member	duration	null	msft:NotesFourPointEightSevenFivePercentDueDecemberFifteenTwentyFortyThreeMember
45	Notes 3.750 Percent Due February 12th 2045	Member	duration	null	msft:NotesThreePointSevenFivePercentDueFebruaryTwelveTwentyFortyFiveMember
46	Notes 4.45 Percent Due November 3rd 2045	Member	duration	null	msft:NotesFourPointFourFivePercentDueNovemberThreeTwentyFortyFiveMember
47	Notes 3.7 Percent Due August 8th 2046	Member	duration	null	msft:NotesThreePointSevenPercentDueAugustEightTwentyFortySixMember
48	Notes 4.25 Percent Due February 6th 2047	Member	duration	null	msft:NotesFourPointTwoFivePercentDueFebruarySixTwentyFortySevenMember
49	Notes 4.0 Percent Due February 12th 2055	Member	duration	null	msft:NotesFourPercentDueFebruaryTwelveTwentyFiftyFiveMember
50	Notes 4.75 Percent Due November 3rd 2055	Member	duration	null	msft:NotesFourPointSevenFivePercentDueNovemberThreeTwentyFiftyFiveMember
51	Notes 3.95 Percent Due August 8th 2056	Member	duration	null	msft:NotesThreePointNineFivePercentDueAugustEightTwentyFiftySixMember
52	Notes 4.5 Percent Due February 6th 2057	Member	duration	null	msft:NotesFourPointFivePercentDueFebruarySixTwentyFiftySevenMember
53	Debt Instrument [Line Items]	LineItems	duration	null	base:DebtInstrumentLineItems
54	Debt maturity date	Concept (date)	duration	null	base:DebtInstrumentMaturityDate
55	Face Value	Concept (xbrli:monetary)	instant	credit	base:DebtInstrumentFaceAmount
56	Stated Interest Rate	Concept (xbrli:pureItemType)	instant	null	base:DebtInstrumentInterestRateStatedPercentage
57	Effective Interest Rate	Concept (xbrli:pureItemType)	instant	null	base:DebtInstrumentInterestRateEffectivePercentage

Model Structure
Network	100890 - Disclosure - Long-term Debt (Parenthetical) (Detail) (http://www.xbrlsite.com/msft/role/DisclosureLongTermDebtParentheticalDetail)
Table	Debt Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Debt Disclosure [Abstract]	Abstract	duration	null	base:DebtDisclosureAbstract
2	Schedule of Long term Debt Instruments [Table]	Table	duration	null	base:DebtInstrumentTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Debt Instrument	Axis	duration	null	base:DebtInstrumentAxis
6	Debt Instrument, Name [Domain]	Member	duration	null	base:DebtInstrumentNameDomain
7	USD Debt Issued in Period	Member	duration	null	msft:USDDebtIssuedInPeriodMember
8	Debt Instrument [Line Items]	LineItems	duration	null	base:DebtInstrumentLineItems
9	Face Value	Concept (xbrli:monetary)	instant	credit	base:DebtInstrumentFaceAmount

Model Structure
Network	100900 - Disclosure - Maturities of Long-term Debt (Detail) (http://www.xbrlsite.com/msft/role/DisclosureMaturitiesOfLongTermDebtDetail)
Table	Debt Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Debt Disclosure [Abstract]	Abstract	duration	null	base:DebtDisclosureAbstract
2	Schedule of Long term Debt Instruments [Table]	Table	duration	null	base:DebtInstrumentTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Debt Instrument [Line Items]	LineItems	duration	null	base:DebtInstrumentLineItems
6	Year Ending June 30, 2018	Concept (xbrli:monetary)	instant	credit	base:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
7	Year Ending June 30, 2019	Concept (xbrli:monetary)	instant	credit	base:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
8	Year Ending June 30, 2020	Concept (xbrli:monetary)	instant	credit	base:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
9	Year Ending June 30, 2021	Concept (xbrli:monetary)	instant	credit	base:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
10	Year Ending June 30, 2022	Concept (xbrli:monetary)	instant	credit	base:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
11	Thereafter	Concept (xbrli:monetary)	instant	credit	base:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
12	Total	Concept (xbrli:monetary)	instant	credit	base:DebtInstrumentFaceAmount

Model Structure
Network	100910 - Disclosure - Provision for Income Taxes (Detail) (http://www.xbrlsite.com/msft/role/DisclosureProvisionForIncomeTaxesDetail)
Table	Income Tax Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Income Tax Disclosure [Abstract]	Abstract	duration	null	base:IncomeTaxDisclosureAbstract
2	Reconciliation of Provision of Income Taxes [Table]	Table	duration	null	msft:ReconciliationOfProvisionOfIncomeTaxesTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Reconciliation of Provision of Income Taxes [Line Items]	LineItems	duration	null	msft:ReconciliationOfProvisionOfIncomeTaxesLineItems
6	Current Taxes	Abstract	duration	null	base:CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract
7	U.S. federal	Concept (xbrli:monetary)	duration	debit	base:CurrentFederalTaxExpenseBenefit
8	U.S. state and local	Concept (xbrli:monetary)	duration	debit	base:CurrentStateAndLocalTaxExpenseBenefit
9	Foreign	Concept (xbrli:monetary)	duration	debit	base:CurrentForeignTaxExpenseBenefit
10	Current taxes	Concept (xbrli:monetary)	duration	debit	base:CurrentIncomeTaxExpenseBenefit
11	Deferred Taxes	Abstract	duration	null	base:DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract
12	Deferred taxes	Concept (xbrli:monetary)	duration	debit	base:DeferredIncomeTaxExpenseBenefit
13	Provision for income taxes	Concept (xbrli:monetary)	duration	debit	base:IncomeTaxExpenseBenefit

Model Structure
Network	100920 - Disclosure - Income Taxes - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureIncomeTaxesAdditionalInformationDetail)
Table	Income Tax Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Income Tax Disclosure [Abstract]	Abstract	duration	null	base:IncomeTaxDisclosureAbstract
2	Income Taxes [Table]	Table	duration	null	msft:IncomeTaxesTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement, Business Segments	Axis	duration	null	base:StatementBusinessSegmentsAxis
6	Segments [Domain]	Member	duration	null	base:SegmentDomain
7	Phone Business	Member	duration	null	msft:PhoneBusinessMember
8	Income Statement Location [Axis]	Axis	duration	null	base:IncomeStatementLocationAxis
9	Income Statement Location [Domain]	Member	duration	null	base:IncomeStatementLocationDomain
10	Impairment, integration, and restructuring expenses	Member	duration	null	msft:ImpairmentIntegrationAndRestructuringExpensesMember
11	Deferred Revenue Arrangement Type	Axis	duration	null	base:DeferredRevenueArrangementTypeAxis
12	Deferred Revenue [Domain]	Member	duration	null	base:DeferredRevenueArrangementTypeDomain
13	Windows 10 Licenses	Member	duration	null	msft:WindowsTenDeferralMember
14	Income Tax Authority	Axis	duration	null	base:IncomeTaxAuthorityAxis
15	Income Tax Authority [Domain]	Member	duration	null	base:IncomeTaxAuthorityDomain
16	Regional Operating Centers	Member	duration	null	msft:RegionalOperatingCentersMember
17	Foreign Country	Member	duration	null	base:ForeignCountryMember
18	Scenario	Axis	duration	null	base:StatementScenarioAxis
19	Scenario, Unspecified	Member	duration	null	base:ScenarioUnspecifiedDomain
20	Restatement Adjustment	Member	duration	null	base:RestatementAdjustmentMember
21	Income Taxes [Line Items]	LineItems	duration	null	msft:IncomeTaxesLineItems
22	U.S. deferred tax benefit	Concept (xbrli:monetary)	duration	debit	base:DeferredFederalStateAndLocalTaxExpenseBenefit
23	Foreign deferred tax benefit	Concept (xbrli:monetary)	duration	debit	base:DeferredForeignIncomeTaxExpenseBenefit
24	U.S. income (loss) before income taxes	Concept (xbrli:monetary)	duration	credit	base:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
25	Foreign income (loss) before income taxes	Concept (xbrli:monetary)	duration	credit	base:IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
26	Foreign earnings, taxed at rates lower than U.S. rate as a percentage of foreign income before tax	Concept (xbrli:pureItemType)	duration	null	msft:ForeignEarningsTaxedAtRatesLowerThanUsRate
27	Deferred income tax assets, loss carryforward	Concept (xbrli:monetary)	instant	debit	base:DeferredTaxAssetsOperatingLossCarryforwards
28	Deferred income tax assets, valuation allowance	Concept (xbrli:monetary)	instant	credit	base:DeferredTaxAssetsValuationAllowance
29	Operating loss carryforwards	Concept (xbrli:monetary)	instant	debit	base:OperatingLossCarryforwards
30	Temporary differences resulting from earnings for certain non-U.S. subsidiaries which are permanently reinvested outside the United States	Concept (xbrli:monetary)	instant	credit	base:UndistributedEarningsOfForeignSubsidiaries
31	Unrecognized tax liability on temporary differences resulting from earnings for certain non-U.S. subsidiaries which are permanently reinvested outside the United States	Concept (xbrli:monetary)	instant	debit	base:DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries
32	Income taxes paid, net of refunds	Concept (xbrli:monetary)	duration	credit	base:IncomeTaxesPaidNet
33	Tax contingencies and other tax liabilities	Concept (xbrli:monetary)	instant	credit	base:AccruedIncomeTaxesNoncurrent
34	Unrecognized tax benefits	Concept (xbrli:monetary)	instant	credit	base:UnrecognizedTaxBenefits
35	Unrecognized tax benefits, if recognized would affect our effective tax rates	Concept (xbrli:monetary)	instant	credit	base:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
36	Accrued interest expense related to uncertain tax positions net of federal income tax benefits	Concept (xbrli:monetary)	instant	credit	base:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued
37	Interest expense on unrecognized tax benefits	Concept (xbrli:monetary)	duration	debit	base:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense

Model Structure
Network	100930 - Disclosure - Income (Loss) Before Income Taxes (Detail) (http://www.xbrlsite.com/msft/role/DisclosureIncomeLossBeforeIncomeTaxesDetail)
Table	Income Tax Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Income Tax Disclosure [Abstract]	Abstract	duration	null	base:IncomeTaxDisclosureAbstract
2	Schedule of Components of Income Before Income Tax Expense (Benefit) [Table]	Table	duration	null	msft:ScheduleOfComponentsOfIncomeBeforeIncomeTaxExpenseBenefitTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Schedule of Components of Income Before Income Tax Expense (Benefit) [Line Items]	LineItems	duration	null	msft:ScheduleOfComponentsOfIncomeBeforeIncomeTaxExpenseBenefitLineItems
6	U.S.	Concept (xbrli:monetary)	duration	credit	base:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
7	Foreign	Concept (xbrli:monetary)	duration	credit	base:IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
8	Income before income taxes	Concept (xbrli:monetary)	duration	credit	base:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

Model Structure
Network	100940 - Disclosure - Difference Between Income Taxes Computed at Federal Statutory Rate and Provision for Income Taxes (Detail) (http://www.xbrlsite.com/msft/role/DisclosureDifferenceBetweenIncomeTaxesComputedAtFederalStatutoryRateAndProvisionForIncomeTaxesDetail)
Table	Income Tax Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Income Tax Disclosure [Abstract]	Abstract	duration	null	base:IncomeTaxDisclosureAbstract
2	Reconciliation of Statutory Federal Tax Rate [Table]	Table	duration	null	msft:ReconciliationOfStatutoryFederalTaxRateTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Reconciliation of Statutory Federal Tax Rate [Line Items]	LineItems	duration	null	msft:ReconciliationOfStatutoryFederalTaxRateLineItems
6	Federal statutory rate	Concept (xbrli:pureItemType)	duration	null	base:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
7	Effect of:	Abstract	duration	null	base:EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract
8	Foreign earnings taxed at lower rates	Concept (xbrli:pureItemType)	duration	null	base:EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
9	Phone business losses	Concept (xbrli:pureItemType)	duration	null	msft:EffectiveIncomeTaxRateReconciliationPhoneBusinessGainsLosses
10	Excess tax benefits relating to stock-based compensation	Concept (xbrli:pureItemType)	duration	null	msft:EffectiveIncomeTaxRateReconciliationDeductionsExcessTaxBenefitsStockBasedCompensation
11	Domestic production activities deduction	Concept (xbrli:pureItemType)	duration	null	base:EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities
12	Interest, net	Concept (xbrli:pureItemType)	duration	null	msft:EffectiveIncomeTaxRateReconciliationInterestIncomeExpense
13	Other reconciling items, net	Concept (xbrli:pureItemType)	duration	null	base:EffectiveIncomeTaxRateReconciliationOtherAdjustments
14	Effective rate	Concept (xbrli:pureItemType)	duration	null	base:EffectiveIncomeTaxRateContinuingOperations

Model Structure
Network	100950 - Disclosure - Deferred Income Tax Assets and Liabilities (Detail) (http://www.xbrlsite.com/msft/role/DisclosureDeferredIncomeTaxAssetsAndLiabilitiesDetail)
Table	Income Tax Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Income Tax Disclosure [Abstract]	Abstract	duration	null	base:IncomeTaxDisclosureAbstract
2	Schedule of Deferred Income Tax Assets and Liabilities [Table]	Table	duration	null	msft:ScheduleOfDeferredIncomeTaxAssetsAndLiabilitiesTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Derivatives, Fair Value, by Balance Sheet Location	Axis	duration	null	base:BalanceSheetLocationAxis
6	Balance Sheet Location [Domain]	Member	duration	null	base:BalanceSheetLocationDomain
7	Other Long-term Assets	Member	duration	null	base:OtherNoncurrentAssetsMember
8	Long-term Deferred Income Tax Liabilities	Member	duration	null	msft:DeferredIncomeTaxLiabilitiesNoncurrentMember
9	Schedule of Deferred Income Tax Assets and Liabilities [Line Items]	LineItems	duration	null	msft:ScheduleOfDeferredIncomeTaxAssetsAndLiabilitiesLineItems
10	Deferred Income Tax Assets	Abstract	duration	null	base:DeferredTaxAssetsNetAbstract
11	Stock-based compensation expense	Concept (xbrli:monetary)	instant	debit	base:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
12	Other expense items	Concept (xbrli:monetary)	instant	debit	base:DeferredTaxAssetsTaxDeferredExpenseOther
13	Restructuring charges	Concept (xbrli:monetary)	instant	debit	base:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsRestructuringCharges
14	Unearned revenue	Concept (xbrli:monetary)	instant	debit	base:DeferredTaxAssetsDeferredIncome
15	Impaired investments	Concept (xbrli:monetary)	instant	debit	base:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses
16	Loss carryforwards	Concept (xbrli:monetary)	instant	debit	base:DeferredTaxAssetsOperatingLossCarryforwards
17	Depreciation and amortization	Concept (xbrli:monetary)	instant	debit	msft:DeferredTaxAssetsDepreciationAndAmortization
18	Other revenue items	Concept (xbrli:monetary)	instant	debit	base:DeferredTaxAssetsOther
19	Deferred income tax assets	Concept (xbrli:monetary)	instant	debit	base:DeferredTaxAssetsGross
20	Less valuation allowance	Concept (xbrli:monetary)	instant	credit	base:DeferredTaxAssetsValuationAllowance
21	Deferred income tax assets, net of valuation allowance	Concept (xbrli:monetary)	instant	debit	base:DeferredTaxAssetsNet
22	Deferred Income Tax Liabilities	Abstract	duration	null	base:DeferredTaxLiabilitiesAbstract
23	Foreign earnings	Concept (xbrli:monetary)	instant	credit	base:DeferredTaxLiabilitiesUndistributedForeignEarnings
24	Unrealized gain on investments and debt	Concept (xbrli:monetary)	instant	credit	msft:DeferredTaxLiabilitiesUnrealizedGainsInvestmentsAndDebt
25	Depreciation and amortization	Concept (xbrli:monetary)	instant	credit	msft:DeferredTaxLiabilitiesDepreciationAndAmortization
26	Other	Concept (xbrli:monetary)	instant	credit	base:DeferredTaxLiabilitiesOther
27	Deferred income tax liabilities	Concept (xbrli:monetary)	instant	credit	base:DeferredIncomeTaxLiabilities
28	Net deferred income tax assets	Concept (xbrli:monetary)	instant	debit	base:DeferredTaxAssetsLiabilitiesNet
29	Net deferred income tax liabilities	Concept (xbrli:monetary)	instant	credit	base:DeferredTaxLiabilities

Model Structure
Network	100960 - Disclosure - Changes in Unrecognized Tax Benefits (Detail) (http://www.xbrlsite.com/msft/role/DisclosureChangesInUnrecognizedTaxBenefitsDetail)
Table	Income Tax Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Income Tax Disclosure [Abstract]	Abstract	duration	null	base:IncomeTaxDisclosureAbstract
2	Income Tax Contingency [Table]	Table	duration	null	base:IncomeTaxContingencyTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Income Tax Contingency [Line Items]	LineItems	duration	null	base:IncomeTaxContingencyLineItems
6	Balance, beginning of year	Concept (xbrli:monetary)	instant	credit	base:UnrecognizedTaxBenefits
7	Decreases related to settlements	Concept (xbrli:monetary)	duration	debit	base:UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
8	Increases for tax positions related to the current year	Concept (xbrli:monetary)	duration	credit	base:UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
9	Increases for tax positions related to prior years	Concept (xbrli:monetary)	duration	credit	base:UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions
10	Decreases for tax positions related to prior years	Concept (xbrli:monetary)	duration	debit	base:UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
11	Decreases due to lapsed statutes of limitations	Concept (xbrli:monetary)	duration	debit	base:UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations
12	Balance, end of year	Concept (xbrli:monetary)	instant	credit	base:UnrecognizedTaxBenefits

Model Structure
Network	100970 - Disclosure - Income Taxes - Additional Information Regarding Examinations (Detail) (http://www.xbrlsite.com/msft/role/DisclosureIncomeTaxesAdditionalInformationRegardingExaminationsDetail)
Table	Income Tax Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Income Tax Disclosure [Abstract]	Abstract	duration	null	base:IncomeTaxDisclosureAbstract
2	Income Tax Examination [Table]	Table	duration	null	base:IncomeTaxExaminationTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Income Tax Authority, Name [Axis]	Axis	duration	null	base:IncomeTaxAuthorityNameAxis
6	Income Tax Authority, Name [Domain]	Member	duration	null	base:IncomeTaxAuthorityNameDomain
7	Internal Revenue Service (IRS)	Member	duration	null	base:InternalRevenueServiceIRSMember
8	Tax Period [Axis]	Axis	duration	null	base:TaxPeriodAxis
9	Tax Period [Domain]	Member	duration	null	base:TaxPeriodDomain
10	Earliest Tax Year	Member	duration	null	base:EarliestTaxYearMember
11	Latest Tax Year	Member	duration	null	base:LatestTaxYearMember
12	Income Tax Authority	Axis	duration	null	base:IncomeTaxAuthorityAxis
13	Income Tax Authority [Domain]	Member	duration	null	base:IncomeTaxAuthorityDomain
14	Foreign Country	Member	duration	null	base:ForeignCountryMember
15	Income Tax Examination [Line Items]	LineItems	duration	null	base:IncomeTaxExaminationLineItems
16	Tax years under audit	Concept (gYear)	duration	null	base:IncomeTaxExaminationYearUnderExamination
17	Tax years subject to examination	Concept (gYear)	duration	null	base:OpenTaxYear

Model Structure
Network	100980 - Disclosure - Restructuring Charges - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureRestructuringChargesAdditionalInformationDetail)
Table	Restructuring And Related Activities [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Restructuring And Related Activities [Abstract]	Abstract	duration	null	base:RestructuringAndRelatedActivitiesAbstract
2	Schedule of Restructuring and Related Costs [Table]	Table	duration	null	base:ScheduleOfRestructuringAndRelatedCostsTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Restructuring Plan [Axis]	Axis	duration	null	base:RestructuringPlanAxis
6	Restructuring Plan [Domain]	Member	duration	null	base:RestructuringPlanDomain
7	Phone Hardware Restructuring Plan	Member	duration	null	msft:PhoneHardwareRestructuringPlanMember
8	2016 Restructuring	Member	duration	null	msft:TwentySixteenRestructuringPlanMember
9	2017 Restructuring	Member	duration	null	msft:TwentySeventeenRestructuringPlanMember
10	Restructuring Type [Axis]	Axis	duration	null	base:RestructuringCostAndReserveAxis
11	Type of Restructuring [Domain]	Member	duration	null	base:TypeOfRestructuringDomain
12	Severance	Member	duration	null	base:EmployeeSeveranceMember
13	Restructuring Cost and Reserve [Line Items]	LineItems	duration	null	base:RestructuringCostAndReserveLineItems
14	Number of positions eliminated	Concept (integer)	duration	null	base:RestructuringAndRelatedCostNumberOfPositionsEliminated
15	Restructuring charges	Concept (xbrli:monetary)	duration	debit	base:RestructuringCharges
16	Reversal of prior year restructuring charges	Concept (xbrli:monetary)	duration	debit	base:RestructuringReserveAccrualAdjustment1
17	Completion date	Concept (date)	duration	null	base:RestructuringAndRelatedActivitiesCompletionDate

Model Structure
Network	100990 - Disclosure - Changes in Restructuring Liability (Detail) (http://www.xbrlsite.com/msft/role/DisclosureChangesInRestructuringLiabilityDetail)
Table	Restructuring And Related Activities [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Restructuring And Related Activities [Abstract]	Abstract	duration	null	base:RestructuringAndRelatedActivitiesAbstract
2	Schedule of Restructuring and Related Costs [Table]	Table	duration	null	base:ScheduleOfRestructuringAndRelatedCostsTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Restructuring Type [Axis]	Axis	duration	null	base:RestructuringCostAndReserveAxis
6	Type of Restructuring [Domain]	Member	duration	null	base:TypeOfRestructuringDomain
7	Severance	Member	duration	null	base:EmployeeSeveranceMember
8	Other	Member	duration	null	base:OtherRestructuringMember
9	Restructuring Cost and Reserve [Line Items]	LineItems	duration	null	base:RestructuringCostAndReserveLineItems
10	Balance, as of June 30, 2016	Concept (xbrli:monetary)	instant	credit	base:RestructuringReserve
11	Restructuring charges	Concept (xbrli:monetary)	duration	debit	base:RestructuringCharges
12	Cash paid	Concept (xbrli:monetary)	duration	credit	base:PaymentsForRestructuring
13	Other	Concept (xbrli:monetary)	duration	debit	base:RestructuringReserveSettledWithoutCash2
14	Balance, as of June 30, 2017	Concept (xbrli:monetary)	instant	credit	base:RestructuringReserve

Model Structure
Network	101000 - Disclosure - Unearned Revenue by Segment (Detail) (http://www.xbrlsite.com/msft/role/DisclosureUnearnedRevenueBySegmentDetail)
Table	Deferred Revenue Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Deferred Revenue Disclosure [Abstract]	Abstract	duration	null	base:DeferredRevenueDisclosureAbstract
2	Deferred Revenue Arrangement, by Type [Table]	Table	duration	null	base:DeferredRevenueArrangementByTypeTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Segment Reporting Reconciling Item	Axis	duration	null	base:ConsolidationItemsAxis
6	Consolidation Items [Domain]	Member	duration	null	base:ConsolidationItemsDomain
7	Reportable Segments	Member	duration	null	base:OperatingSegmentsMember
8	Corporate and Other	Member	duration	null	msft:CorporateAndReconcilingItemsMember
9	Statement, Business Segments	Axis	duration	null	base:StatementBusinessSegmentsAxis
10	Segments [Domain]	Member	duration	null	base:SegmentDomain
11	Productivity and Business Processes	Member	duration	null	msft:ProductivityAndBusinessProcessesMember
12	Intelligent Cloud	Member	duration	null	msft:IntelligentCloudMember
13	More Personal Computing	Member	duration	null	msft:MorePersonalComputingMember
14	Deferred Revenue Arrangement [Line Items]	LineItems	duration	null	base:DeferredRevenueArrangementLineItems
15	Unearned revenue	Concept (xbrli:monetary)	instant	credit	base:DeferredRevenue

Model Structure
Network	101010 - Disclosure - Commitments - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureCommitmentsAdditionalInformationDetail)
Table	Commitments And Contingencies Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Commitments And Contingencies Disclosure [Abstract]	Abstract	duration	null	base:CommitmentsAndContingenciesDisclosureAbstract
2	Commitments [Table]	Table	duration	null	msft:CommitmentsTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Category of Item Purchased [Axis]	Axis	duration	null	base:LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis
6	Long term Purchase Commitment, Category of Item Purchased [Domain]	Member	duration	null	base:LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain
7	Building, Building Improvements and Leasehold Improvements	Member	duration	null	msft:BuildingBuildingImprovementsAndLeaseholdImprovementsMember
8	Property Subject to or Available for Operating Lease [Axis]	Axis	duration	null	base:PropertySubjectToOrAvailableForOperatingLeaseAxis
9	Property Subject to or Available for Operating Lease [Domain]	Member	duration	null	base:PropertySubjectToOrAvailableForOperatingLeaseDomain
10	Buildings	Member	duration	null	base:BuildingMember
11	Derivatives, Fair Value, by Balance Sheet Location	Axis	duration	null	base:BalanceSheetLocationAxis
12	Balance Sheet Location [Domain]	Member	duration	null	base:BalanceSheetLocationDomain
13	Other Current Liabilities	Member	duration	null	base:OtherCurrentLiabilitiesMember
14	Other Long-term Liabilities	Member	duration	null	base:OtherNoncurrentLiabilitiesMember
15	Unrecorded Unconditional Purchase Obligation by Category of Item Purchased	Axis	duration	null	base:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
16	Unconditional Purchase Obligation, Category of Goods or Services Acquired	Member	duration	null	base:UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain
17	Capital Leases	Member	duration	null	msft:CapitalLeaseMember
18	Commitments [Line Items]	LineItems	duration	null	msft:CommitmentsLineItems
19	Committed for construction of new buildings, building improvements and leasehold improvements	Concept (xbrli:monetary)	instant	credit	base:CommitmentsFairValueDisclosure
20	Rental expense for facilities operating leases	Concept (xbrli:monetary)	duration	debit	base:LeaseAndRentalExpense
21	Current capital lease obligations	Concept (xbrli:monetary)	instant	credit	base:CapitalLeaseObligationsCurrent
22	Long-term capital lease obligations	Concept (xbrli:monetary)	instant	credit	base:CapitalLeaseObligationsNoncurrent
23	Additional purchase obligations for capital leases executed but not yet recorded	Concept (xbrli:monetary)	instant	credit	base:UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount

Model Structure
Network	101020 - Disclosure - Future Minimum Rental Commitments Under Non-cancellable Operating Leases (Detail) (http://www.xbrlsite.com/msft/role/DisclosureFutureMinimumRentalCommitmentsUnderNonCancellableOperatingLeasesDetail)
Table	Commitments And Contingencies Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Commitments And Contingencies Disclosure [Abstract]	Abstract	duration	null	base:CommitmentsAndContingenciesDisclosureAbstract
2	Schedule of Operating Leased Assets [Table]	Table	duration	null	base:ScheduleOfOperatingLeasedAssetsTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Property, Plant and Equipment, Type [Axis]	Axis	duration	null	base:PropertyPlantAndEquipmentByTypeAxis
6	Property, Plant and Equipment, Type [Domain]	Member	duration	null	base:PropertyPlantAndEquipmentTypeDomain
7	Buildings	Member	duration	null	base:BuildingMember
8	Operating Leased Assets [Line Items]	LineItems	duration	null	base:OperatingLeasedAssetsLineItems
9	Year Ending June 30, 2018	Concept (xbrli:monetary)	instant	credit	base:OperatingLeasesFutureMinimumPaymentsDueCurrent
10	Year Ending June 30, 2019	Concept (xbrli:monetary)	instant	credit	base:OperatingLeasesFutureMinimumPaymentsDueInTwoYears
11	Year Ending June 30, 2020	Concept (xbrli:monetary)	instant	credit	base:OperatingLeasesFutureMinimumPaymentsDueInThreeYears
12	Year Ending June 30, 2021	Concept (xbrli:monetary)	instant	credit	base:OperatingLeasesFutureMinimumPaymentsDueInFourYears
13	Year Ending June 30, 2022	Concept (xbrli:monetary)	instant	credit	base:OperatingLeasesFutureMinimumPaymentsDueInFiveYears
14	Thereafter	Concept (xbrli:monetary)	instant	credit	base:OperatingLeasesFutureMinimumPaymentsDueThereafter
15	Total	Concept (xbrli:monetary)	instant	credit	base:OperatingLeasesFutureMinimumPaymentsDue

Model Structure
Network	101030 - Disclosure - Future Minimum Lease Payments under Non-cancellable Capital Leases (Detail) (http://www.xbrlsite.com/msft/role/DisclosureFutureMinimumLeasePaymentsUnderNonCancellableCapitalLeasesDetail)
Table	Commitments And Contingencies Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Commitments And Contingencies Disclosure [Abstract]	Abstract	duration	null	base:CommitmentsAndContingenciesDisclosureAbstract
2	Future Minimum Lease Payments Under Non Cancellable Capital Leases [Table]	Table	duration	null	msft:FutureMinimumLeasePaymentsUnderNonCancellableCapitalLeasesTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Future Minimum Lease Payments Under Non Cancellable Capital Leases [Line Items]	LineItems	duration	null	msft:FutureMinimumLeasePaymentsUnderNonCancellableCapitalLeasesLineItems
6	Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]	Abstract	duration	null	base:CapitalLeasesFutureMinimumPaymentsDueAbstract
7	Year Ending June 30, 2018	Concept (xbrli:monetary)	instant	credit	base:CapitalLeasesFutureMinimumPaymentsDueCurrent
8	Year Ending June 30, 2019	Concept (xbrli:monetary)	instant	credit	base:CapitalLeasesFutureMinimumPaymentsDueInTwoYears
9	Year Ending June 30, 2020	Concept (xbrli:monetary)	instant	credit	base:CapitalLeasesFutureMinimumPaymentsDueInThreeYears
10	Year Ending June 30, 2021	Concept (xbrli:monetary)	instant	credit	base:CapitalLeasesFutureMinimumPaymentsDueInFourYears
11	Year Ending June 30, 2022	Concept (xbrli:monetary)	instant	credit	base:CapitalLeasesFutureMinimumPaymentsDueInFiveYears
12	Thereafter	Concept (xbrli:monetary)	instant	credit	base:CapitalLeasesFutureMinimumPaymentsDueThereafter
13	Total	Concept (xbrli:monetary)	instant	credit	base:CapitalLeasesFutureMinimumPaymentsDue

Model Structure
Network	101040 - Disclosure - Future Minimum Lease Payments under Non-cancellable Capital Leases (Parenthetical) (Detail) (http://www.xbrlsite.com/msft/role/DisclosureFutureMinimumLeasePaymentsUnderNonCancellableCapitalLeasesParentheticalDetail)
Table	Commitments And Contingencies Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Commitments And Contingencies Disclosure [Abstract]	Abstract	duration	null	base:CommitmentsAndContingenciesDisclosureAbstract
2	Future Minimum Lease Payments Under Non Cancellable Capital Leases [Table]	Table	duration	null	msft:FutureMinimumLeasePaymentsUnderNonCancellableCapitalLeasesTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Future Minimum Lease Payments Under Non Cancellable Capital Leases [Line Items]	LineItems	duration	null	msft:FutureMinimumLeasePaymentsUnderNonCancellableCapitalLeasesLineItems
6	Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]	Abstract	duration	null	base:CapitalLeasesFutureMinimumPaymentsDueAbstract
7	Capital leases includes imputed interest	Concept (xbrli:monetary)	instant	debit	base:CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments

Model Structure
Network	101050 - Disclosure - Contingencies - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureContingenciesAdditionalInformationDetail)
Table	Commitments And Contingencies Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Commitments And Contingencies Disclosure [Abstract]	Abstract	duration	null	base:CommitmentsAndContingenciesDisclosureAbstract
2	Loss Contingencies [Table]	Table	duration	null	base:LossContingenciesTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Loss Contingencies [Line Items]	LineItems	duration	null	base:LossContingenciesLineItems
6	Accrual for disclosed loss contingencies, current, ending balance	Concept (xbrli:monetary)	instant	credit	base:LossContingencyAccrualCarryingValueCurrent
7	Amount not accrued for estimated maximum losses for disclosed loss contingencies	Concept (xbrli:monetary)	instant	debit	base:LossContingencyRangeOfPossibleLossPortionNotAccrued

Model Structure
Network	101060 - Disclosure - Shares of Common Stock Outstanding (Detail) (http://www.xbrlsite.com/msft/role/DisclosureSharesOfCommonStockOutstandingDetail)
Table	Equity [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Equity [Abstract]	Abstract	duration	null	base:EquityAbstract
2	Schedule of Capital Units [Table]	Table	duration	null	base:ScheduleOfCapitalUnitsTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Capital Unit [Line Items]	LineItems	duration	null	base:CapitalUnitLineItems
6	Balance, beginning of year	Concept (xbrli:shares)	instant	null	base:CommonStockSharesOutstanding
7	Issued	Concept (xbrli:shares)	duration	null	base:StockIssuedDuringPeriodSharesNewIssues
8	Repurchased	Concept (xbrli:shares)	duration	null	base:StockRepurchasedDuringPeriodShares
9	Balance, end of year	Concept (xbrli:shares)	instant	null	base:CommonStockSharesOutstanding

Model Structure
Network	101070 - Disclosure - Stockholders' Equity - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureStockholdersEquityAdditionalInformationDetail)
Table	Statement Of Stockholders Equity [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Statement Of Stockholders Equity [Abstract]	Abstract	duration	null	base:StatementOfStockholdersEquityAbstract
2	Share Repurchases [Table]	Table	duration	null	msft:ShareRepurchasesTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Share Repurchase Program	Axis	duration	null	base:ShareRepurchaseProgramAxis
6	Share Repurchase Program	Member	duration	null	base:ShareRepurchaseProgramDomain
7	Share Repurchase Program 2013	Member	duration	null	msft:ShareRepurchaseProgramTwentyThirteenMember
8	Share Repurchase Program 2016	Member	duration	null	msft:ShareRepurchaseProgramTwentySixteenMember
9	Share Repurchases [Line Items]	LineItems	duration	null	msft:ShareRepurchasesLineItems
10	Amount available for repurchase under the share repurchase program approved by the company"s Board of Directors	Concept (xbrli:monetary)	instant	credit	base:StockRepurchaseProgramAuthorizedAmount1
11	Unused amount of share repurchase program	Concept (xbrli:monetary)	instant	credit	base:StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1

Model Structure
Network	101080 - Disclosure - Share Repurchases (Detail) (http://www.xbrlsite.com/msft/role/DisclosureShareRepurchasesDetail)
Table	Equity [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Equity [Abstract]	Abstract	duration	null	base:EquityAbstract
2	Share Repurchases [Table]	Table	duration	null	msft:ShareRepurchasesTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Share Repurchase Program	Axis	duration	null	base:ShareRepurchaseProgramAxis
6	Share Repurchase Program	Member	duration	null	base:ShareRepurchaseProgramDomain
7	Share Repurchase Program 2013	Member	duration	null	msft:ShareRepurchaseProgramTwentyThirteenMember
8	Share Repurchase Program 2016	Member	duration	null	msft:ShareRepurchaseProgramTwentySixteenMember
9	Share Repurchases [Line Items]	LineItems	duration	null	msft:ShareRepurchasesLineItems
10	Shares of common stock repurchased	Concept (xbrli:shares)	duration	null	base:StockRepurchasedDuringPeriodShares
11	Value of common stock repurchased	Concept (xbrli:monetary)	duration	debit	base:StockRepurchasedDuringPeriodValue

Model Structure
Network	101090 - Disclosure - Dividends Declared (Detail) (http://www.xbrlsite.com/msft/role/DisclosureDividendsDeclaredDetail)
Table	Equity [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Equity [Abstract]	Abstract	duration	null	base:EquityAbstract
2	Dividends [Table]	Table	duration	null	msft:DividendsTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Dividends [Line Items]	LineItems	duration	null	msft:DividendsLineItems
6	Declaration Date	Concept (date)	duration	null	base:DividendsPayableDateDeclaredDayMonthAndYear
7	Dividend Per Share	Concept (xbrli:decimalItemType)	duration	null	base:CommonStockDividendsPerShareDeclared
8	Record Date	Concept (date)	duration	null	base:DividendsPayableDateOfRecordDayMonthAndYear
9	Total Amount	Concept (xbrli:monetary)	duration	debit	base:DividendsCommonStockCash
10	Payment Date	Concept (date)	duration	null	base:DividendPayableDateToBePaidDayMonthAndYear

Model Structure
Network	101100 - Disclosure - Summary of Changes in Accumulated Other Comprehensive Income by Component (Detail) (http://www.xbrlsite.com/msft/role/DisclosureSummaryOfChangesInAccumulatedOtherComprehensiveIncomeByComponentDetail)
Table	Statement Of Income And Comprehensive Income [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Statement Of Income And Comprehensive Income [Abstract]	Abstract	duration	null	base:StatementOfIncomeAndComprehensiveIncomeAbstract
2	Accumulated Other Comprehensive Income (Loss) [Table]	Table	duration	null	base:AccumulatedOtherComprehensiveIncomeLossTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Equity Components [Axis]	Axis	duration	null	base:StatementEquityComponentsAxis
6	Equity Component [Domain]	Member	duration	null	base:EquityComponentDomain
7	Derivatives	Member	duration	null	base:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
8	Investments	Member	duration	null	base:AccumulatedNetUnrealizedInvestmentGainLossMember
9	Translation adjustments and other	Member	duration	null	msft:AccumulatedTranslationAdjustmentAndOtherMember
10	Accumulated other comprehensive income	Member	duration	null	base:AccumulatedOtherComprehensiveIncomeMember
11	Income Statement Location [Axis]	Axis	duration	null	base:IncomeStatementLocationAxis
12	Income Statement Location [Domain]	Member	duration	null	base:IncomeStatementLocationDomain
13	Revenue	Member	duration	null	base:SalesMember
14	Other income (expense), net	Member	duration	null	base:NonoperatingIncomeExpenseMember
15	Accumulated Other Comprehensive Income (Loss) [Line Items]	LineItems	duration	null	base:AccumulatedOtherComprehensiveIncomeLossLineItems
16	Balance, beginning of period	Concept (xbrli:monetary)	instant	credit	base:StockholdersEquity
17	Unrealized gains, net of tax effects	Concept (xbrli:monetary)	duration	credit	base:OciBeforeReclassificationsNetOfTaxAttributableToParent
18	Reclassification adjustments for gains	Concept (xbrli:monetary)	duration	debit	base:ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent
19	Tax expense included in provision for income taxes	Concept (xbrli:monetary)	duration	credit	base:ReclassificationFromAociCurrentPeriodTax
20	Amounts reclassified from accumulated other comprehensive income	Concept (xbrli:monetary)	duration	debit	base:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent
21	Net current period other comprehensive income (loss)	Concept (xbrli:monetary)	duration	credit	base:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
22	Balance, end of period	Concept (xbrli:monetary)	instant	credit	base:StockholdersEquity

Model Structure
Network	101110 - Disclosure - Summary of Changes in Accumulated Other Comprehensive Income by Component (Parenthetical) (Detail) (http://www.xbrlsite.com/msft/role/DisclosureSummaryOfChangesInAccumulatedOtherComprehensiveIncomeByComponentParentheticalDetail)
Table	Statement Of Income And Comprehensive Income [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Statement Of Income And Comprehensive Income [Abstract]	Abstract	duration	null	base:StatementOfIncomeAndComprehensiveIncomeAbstract
2	Accumulated Other Comprehensive Income (Loss) [Table]	Table	duration	null	base:AccumulatedOtherComprehensiveIncomeLossTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Equity Components [Axis]	Axis	duration	null	base:StatementEquityComponentsAxis
6	Equity Component [Domain]	Member	duration	null	base:EquityComponentDomain
7	Derivatives	Member	duration	null	base:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
8	Investments	Member	duration	null	base:AccumulatedNetUnrealizedInvestmentGainLossMember
9	Translation adjustments and other	Member	duration	null	msft:AccumulatedTranslationAdjustmentAndOtherMember
10	Accumulated Other Comprehensive Income (Loss) [Line Items]	LineItems	duration	null	base:AccumulatedOtherComprehensiveIncomeLossLineItems
11	Unrealized gains (losses), tax effects	Concept (xbrli:monetary)	duration	debit	base:OtherComprehensiveIncomeLossBeforeReclassificationsTax
12	Net current period other comprehensive income (loss), tax effects	Concept (xbrli:monetary)	duration	debit	base:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1

Model Structure
Network	101120 - Disclosure - Employee Stock and Savings Plans - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureEmployeeStockAndSavingsPlansAdditionalInformationDetail)
Table	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	Abstract	duration	null	base:DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
2	Compensation Related Costs Disclosure [Table]	Table	duration	null	msft:CompensationRelatedCostsDisclosureTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Award Type [Axis]	Axis	duration	null	base:AwardTypeAxis
6	Equity Award [Domain]	Member	duration	null	base:ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain
7	Stock Awards	Member	duration	null	base:RestrictedStockMember
8	Restricted Stock Units	Member	duration	null	base:RestrictedStockUnitsRSUMember
9	Performance Stock Units	Member	duration	null	base:PerformanceSharesMember
10	Employee Stock	Member	duration	null	base:EmployeeStockMember
11	Range	Axis	duration	null	base:RangeAxis
12	Range [Domain]	Member	duration	null	base:RangeMember
13	Lower Limit	Member	duration	null	base:MinimumMember
14	Upper Limit	Member	duration	null	base:MaximumMember
15	Plan Name [Axis]	Axis	duration	null	base:PlanNameAxis
16	Plan Name [Domain]	Member	duration	null	base:PlanNameDomain
17	Executive Incentive Plan	Member	duration	null	msft:ExecutiveIncentivePlanMember
18	Other Postretirement Benefits, Individual Contracts, Type of Deferred Compensation [Axis]	Axis	duration	null	base:DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensationAxis
19	Other Postretirement Benefits, Individual Contracts, Type of Deferred Compensation [Domain]	Member	duration	null	base:OtherPostretirementBenefitsIndividualContractsTypeOfDeferredCompensationDomain
20	First 6% of Participant Contributions	Member	duration	null	msft:FirstSixPercentOfParticipantContributionsMember
21	IRS Compensation Limit	Member	duration	null	msft:IRSCompensationLimitMember
22	Compensation Related Costs Disclosure [Line Items]	LineItems	duration	null	msft:CompensationRelatedCostsDisclosureLineItems
23	Shares authorized for future grant	Concept (xbrli:shares)	instant	null	base:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
24	Award vest period	Concept (duration)	duration	null	base:ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
25	Unrecognized compensation costs	Concept (xbrli:monetary)	instant	debit	base:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
26	Unrecognized compensation costs are expected to be recognized over a weighted average period (years)	Concept (duration)	duration	null	base:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
27	Weighted average grant-date fair value	Concept (xbrli:decimalItemType)	duration	null	base:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
28	Fair value of awards vested	Concept (xbrli:monetary)	duration	debit	base:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
29	Percentage of market value at which employees are able to purchase shares of common stock	Concept (xbrli:pureItemType)	duration	null	base:SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent
30	Maximum percentage of gross compensation at which employees may purchase shares	Concept (xbrli:pureItemType)	instant	null	base:ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate
31	Company contribution amount for each dollar a participant contributes to the savings plan	Concept (xbrli:pureItemType)	duration	null	base:DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
32	Percentage of employee"s earnings the company may contribute to the savings plan	Concept (xbrli:pureItemType)	duration	null	base:DefinedContributionPlanEmployerMatchingContributionPercent
33	Matching contributions for all employee savings plans	Concept (xbrli:monetary)	duration	debit	base:DefinedContributionPlanCostRecognized

Model Structure
Network	101130 - Disclosure - Stock-Based Compensation Expense and Related Income Tax Benefits (Detail) (http://www.xbrlsite.com/msft/role/DisclosureStockBasedCompensationExpenseAndRelatedIncomeTaxBenefitsDetail)
Table	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	Abstract	duration	null	base:DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
2	Schedule of Employee Service Share based Compensation, Allocation of Recognized Period Costs [Table]	Table	duration	null	base:ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]	LineItems	duration	null	base:EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems
6	Stock-based compensation expense	Concept (xbrli:monetary)	duration	debit	base:AllocatedShareBasedCompensationExpense
7	Income tax benefits related to stock-based compensation	Concept (xbrli:monetary)	duration	credit	base:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense

Model Structure
Network	101140 - Disclosure - Assumptions Used in Estimating the Fair Value of Stock Award Grants (Detail) (http://www.xbrlsite.com/msft/role/DisclosureAssumptionsUsedInEstimatingFairValueOfStockAwardGrantsDetail)
Table	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	Abstract	duration	null	base:DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
2	Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Table]	Table	duration	null	msft:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMethodUsedTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Range	Axis	duration	null	base:RangeAxis
6	Range [Domain]	Member	duration	null	base:RangeMember
7	Lower Limit	Member	duration	null	base:MinimumMember
8	Upper Limit	Member	duration	null	base:MaximumMember
9	Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items]	LineItems	duration	null	msft:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMethodUsedLineItems
10	Dividends per share (quarterly amounts)	Concept (xbrli:decimalItemType)	duration	null	msft:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendsPerShare
11	Interest rates minimum	Concept (xbrli:pureItemType)	duration	null	base:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum
12	Interest rates maximum	Concept (xbrli:pureItemType)	duration	null	base:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum

Model Structure
Network	101150 - Disclosure - Stock Plan Activity (Detail) (http://www.xbrlsite.com/msft/role/DisclosureStockPlanActivityDetail)
Table	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	Abstract	duration	null	base:DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
2	Schedule of Share based Compensation Arrangements by Share based Payment Award [Table]	Table	duration	null	base:ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Award Type [Axis]	Axis	duration	null	base:AwardTypeAxis
6	Equity Award [Domain]	Member	duration	null	base:ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain
7	Stock Awards	Member	duration	null	base:RestrictedStockMember
8	Share based Compensation Arrangement by Share based Payment Award [Line Items]	LineItems	duration	null	base:ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
9	Shares	Abstract	duration	null	base:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward
10	Nonvested balance, beginning of year	Concept (xbrli:shares)	instant	null	base:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
11	Granted	Concept (xbrli:shares)	duration	null	base:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
12	Assumed in acquisitions	Concept (xbrli:shares)	duration	null	msft:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAssumedAcquisitionInPeriod
13	Vested	Concept (xbrli:shares)	duration	null	base:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
14	Forfeited	Concept (xbrli:shares)	duration	null	base:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
15	Nonvested balance, end of year	Concept (xbrli:shares)	instant	null	base:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
16	Weighted Average Grant-Date Fair Value	Abstract	duration	null	base:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward
17	Nonvested balance, beginning of year	Concept (xbrli:decimalItemType)	instant	null	base:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
18	Granted	Concept (xbrli:decimalItemType)	duration	null	base:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
19	Assumed in acquisitions	Concept (xbrli:decimalItemType)	duration	null	msft:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAssumedInAcquisitionsWeightedAverageGrantDateFairValue
20	Vested	Concept (xbrli:decimalItemType)	duration	null	base:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
21	Forfeited	Concept (xbrli:decimalItemType)	duration	null	base:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
22	Nonvested balance, end of year	Concept (xbrli:decimalItemType)	instant	null	base:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

Model Structure
Network	101160 - Disclosure - Stock Plan Activity (Parenthetical) (Detail) (http://www.xbrlsite.com/msft/role/DisclosureStockPlanActivityParentheticalDetail)
Table	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	Abstract	duration	null	base:DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
2	Schedule of Share based Compensation Arrangements by Share based Payment Award [Table]	Table	duration	null	base:ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Award Type [Axis]	Axis	duration	null	base:AwardTypeAxis
6	Equity Award [Domain]	Member	duration	null	base:ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain
7	Performance Stock Units	Member	duration	null	base:PerformanceSharesMember
8	Share based Compensation Arrangement by Share based Payment Award [Line Items]	LineItems	duration	null	base:ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
9	Nonvested stock awards granted	Concept (xbrli:shares)	duration	null	base:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

Model Structure
Network	101170 - Disclosure - Employee Purchased Shares (Detail) (http://www.xbrlsite.com/msft/role/DisclosureEmployeePurchasedSharesDetail)
Table	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	Abstract	duration	null	base:DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
2	Employee Stock Purchase Plan [Table]	Table	duration	null	msft:EmployeeStockPurchasePlanTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Employee Stock Purchase Plan [Line Items]	LineItems	duration	null	msft:EmployeeStockPurchasePlanLineItems
6	Shares purchased	Concept (xbrli:shares)	duration	null	base:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
7	Average price per share	Concept (xbrli:decimalItemType)	duration	null	msft:StockIssuedEmployeeStockPurchasePlanAveragePricePerShare

Model Structure
Network	101180 - Disclosure - Segment Revenue (Detail) (http://www.xbrlsite.com/msft/role/DisclosureSegmentRevenueDetail)
Table	Segment Reporting [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Segment Reporting [Abstract]	Abstract	duration	null	base:SegmentReportingAbstract
2	Schedule of Segment Reporting Information, by Segment [Table]	Table	duration	null	base:ScheduleOfSegmentReportingInformationBySegmentTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Segment Reporting Reconciling Item	Axis	duration	null	base:ConsolidationItemsAxis
6	Consolidation Items [Domain]	Member	duration	null	base:ConsolidationItemsDomain
7	Reportable Segments	Member	duration	null	base:OperatingSegmentsMember
8	Corporate and Other	Member	duration	null	msft:CorporateAndReconcilingItemsMember
9	Statement, Business Segments	Axis	duration	null	base:StatementBusinessSegmentsAxis
10	Segments [Domain]	Member	duration	null	base:SegmentDomain
11	Productivity and Business Processes	Member	duration	null	msft:ProductivityAndBusinessProcessesMember
12	Intelligent Cloud	Member	duration	null	msft:IntelligentCloudMember
13	More Personal Computing	Member	duration	null	msft:MorePersonalComputingMember
14	Segment Reporting Information [Line Items]	LineItems	duration	null	base:SegmentReportingInformationLineItems
15	Revenue	Concept (xbrli:monetary)	duration	credit	base:SalesRevenueNet

Model Structure
Network	101190 - Disclosure - Operating Income (Loss) by Segment (Detail) (http://www.xbrlsite.com/msft/role/DisclosureOperatingIncomeLossBySegmentDetail)
Table	Segment Reporting [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Segment Reporting [Abstract]	Abstract	duration	null	base:SegmentReportingAbstract
2	Schedule of Segment Reporting Information, by Segment [Table]	Table	duration	null	base:ScheduleOfSegmentReportingInformationBySegmentTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Segment Reporting Reconciling Item	Axis	duration	null	base:ConsolidationItemsAxis
6	Consolidation Items [Domain]	Member	duration	null	base:ConsolidationItemsDomain
7	Reportable Segments	Member	duration	null	base:OperatingSegmentsMember
8	Corporate and Other	Member	duration	null	msft:CorporateAndReconcilingItemsMember
9	Statement, Business Segments	Axis	duration	null	base:StatementBusinessSegmentsAxis
10	Segments [Domain]	Member	duration	null	base:SegmentDomain
11	Productivity and Business Processes	Member	duration	null	msft:ProductivityAndBusinessProcessesMember
12	Intelligent Cloud	Member	duration	null	msft:IntelligentCloudMember
13	More Personal Computing	Member	duration	null	msft:MorePersonalComputingMember
14	Segment Reporting Information [Line Items]	LineItems	duration	null	base:SegmentReportingInformationLineItems
15	Operating income (loss)	Concept (xbrli:monetary)	duration	credit	base:OperatingIncomeLoss

Model Structure
Network	101200 - Disclosure - Corporate and Other Operating Income (Loss) Activity (Detail) (http://www.xbrlsite.com/msft/role/DisclosureCorporateAndOtherOperatingIncomeLossActivityDetail)
Table	Segment Reporting [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Segment Reporting [Abstract]	Abstract	duration	null	base:SegmentReportingAbstract
2	Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table]	Table	duration	null	base:ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Segment Reporting Reconciling Item	Axis	duration	null	base:ConsolidationItemsAxis
6	Consolidation Items [Domain]	Member	duration	null	base:ConsolidationItemsDomain
7	Corporate and Other	Member	duration	null	msft:CorporateAndReconcilingItemsMember
8	Income Statement Location [Axis]	Axis	duration	null	base:IncomeStatementLocationAxis
9	Income Statement Location [Domain]	Member	duration	null	base:IncomeStatementLocationDomain
10	Impairment, integration, and restructuring expenses	Member	duration	null	msft:ImpairmentIntegrationAndRestructuringExpensesMember
11	Deferred Revenue Arrangement Type	Axis	duration	null	base:DeferredRevenueArrangementTypeAxis
12	Deferred Revenue [Domain]	Member	duration	null	base:DeferredRevenueArrangementTypeDomain
13	Net revenue deferral from Windows 10	Member	duration	null	msft:WindowsTenDeferralMember
14	Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	LineItems	duration	null	base:SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems
15	Operating income (loss)	Concept (xbrli:monetary)	duration	credit	base:OperatingIncomeLoss

Model Structure
Network	101210 - Disclosure - Segment Information and Geographic Data - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureSegmentInformationAndGeographicDataAdditionalInformationDetail)
Table	Segment Reporting [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Segment Reporting [Abstract]	Abstract	duration	null	base:SegmentReportingAbstract
2	Schedule of Segment Reporting Information, by Segment [Table]	Table	duration	null	base:ScheduleOfSegmentReportingInformationBySegmentTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Segment Reporting Information [Line Items]	LineItems	duration	null	base:SegmentReportingInformationLineItems
6	Sales to an individual customer	Concept (string)	duration	null	base:SegmentReportingDisclosureOfMajorCustomers

Model Structure
Network	101220 - Disclosure - Revenue Classified by Major Geographic Areas (Detail) (http://www.xbrlsite.com/msft/role/DisclosureRevenueClassifiedByMajorGeographicAreasDetail)
Table	Segment Reporting [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Segment Reporting [Abstract]	Abstract	duration	null	base:SegmentReportingAbstract
2	Geographic Information [Table]	Table	duration	null	msft:GeographicInformationTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement, Geographical	Axis	duration	null	base:StatementGeographicalAxis
6	Geographical [Domain]	Member	duration	null	base:SegmentGeographicalDomain
7	United States	Member	duration	null	country:US
8	Other Countries	Member	duration	null	base:NonUsMember
9	Geographic Information [Line Items]	LineItems	duration	null	msft:GeographicInformationLineItems
10	Revenues	Concept (xbrli:monetary)	duration	credit	base:SalesRevenueNet

Model Structure
Network	101230 - Disclosure - Revenue Classified by Significant Product and Service Offerings (Detail) (http://www.xbrlsite.com/msft/role/DisclosureRevenueClassifiedBySignificantProductAndServiceOfferingsDetail)
Table	Segment Reporting [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Segment Reporting [Abstract]	Abstract	duration	null	base:SegmentReportingAbstract
2	Revenue from External Customers by Products and Services [Table]	Table	duration	null	base:ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Products and Services	Axis	duration	null	base:ProductOrServiceAxis
6	Products and Services [Domain]	Member	duration	null	base:ProductsAndServicesDomain
7	Microsoft Office system	Member	duration	null	msft:MicrosoftOfficeSystemMember
8	Server products and tools	Member	duration	null	msft:ServerProductsAndToolsMember
9	Xbox	Member	duration	null	msft:XboxMember
10	Windows PC operating system	Member	duration	null	msft:WindowsOperatingSystemsForComputingDevicesMember
11	Advertising	Member	duration	null	msft:AdvertisingMember
12	Consulting and product support services	Member	duration	null	msft:ConsultingAndProductSupportServicesMember
13	Devices	Member	duration	null	msft:DevicesMember
14	LinkedIn	Member	duration	null	msft:LinkedInCorporationMember
15	Other products and services	Member	duration	null	msft:OtherProductsAndServicesMember
16	Revenue from External Customer [Line Items]	LineItems	duration	null	base:EntityWideInformationRevenueFromExternalCustomerLineItems
17	Revenue	Concept (xbrli:monetary)	duration	credit	base:SalesRevenueNet

Model Structure
Network	101240 - Disclosure - Revenue Classified by Significant Product and Service Offerings (Parenthetical) (Detail) (http://www.xbrlsite.com/msft/role/DisclosureRevenueClassifiedBySignificantProductAndServiceOfferingsParentheticalDetail)
Table	Segment Reporting [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Segment Reporting [Abstract]	Abstract	duration	null	base:SegmentReportingAbstract
2	Revenue from External Customers by Products and Services [Table]	Table	duration	null	base:ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Products or Services Secondary Categorization [Axis]	Axis	duration	null	msft:ProductsOrServicesSecondaryCategorizationAxis
6	Products or Services Name Secondary Categorization [Domain]	Member	duration	null	msft:ProductsOrServicesNameSecondaryCategorizationDomain
7	Commercial Cloud	Member	duration	null	msft:CommercialCloudMember
8	Revenue from External Customer [Line Items]	LineItems	duration	null	base:EntityWideInformationRevenueFromExternalCustomerLineItems
9	Revenue	Concept (xbrli:monetary)	duration	credit	base: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.xbrlsite.com/msft/role/DisclosureLongLivedAssetsExcludingFinancialInstrumentsAndTaxAssetsClassifiedByLocationOfControllingStatutoryCompanyDetail)
Table	Segment Reporting [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Segment Reporting [Abstract]	Abstract	duration	null	base:SegmentReportingAbstract
2	Certain Long Lived Assets by Geography [Table]	Table	duration	null	msft:CertainLongLivedAssetsByGeographyTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Statement, Geographical	Axis	duration	null	base:StatementGeographicalAxis
6	Geographical [Domain]	Member	duration	null	base:SegmentGeographicalDomain
7	United States	Member	duration	null	country:US
8	Ireland	Member	duration	null	country:IE
9	Luxembourg	Member	duration	null	country:LU
10	Other Countries	Member	duration	null	msft:OtherCountriesMember
11	Certain Long-Lived Assets by Geography [Line Items]	LineItems	duration	null	msft:CertainLongLivedAssetsByGeographyLineItems
12	Long-lived assets	Concept (xbrli:monetary)	instant	debit	base:NoncurrentAssets

Model Structure
Network	101260 - Disclosure - Quarterly Information (Unaudited) (Detail) (http://www.xbrlsite.com/msft/role/DisclosureQuarterlyInformationUnauditedDetail)
Table	Quarterly Financial Information Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Quarterly Financial Information Disclosure [Abstract]	Abstract	duration	null	base:QuarterlyFinancialInformationDisclosureAbstract
2	Quarterly Financial Information [Table]	Table	duration	null	msft:QuarterlyFinancialInformationTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Quarterly Financial Information [Line Items]	LineItems	duration	null	msft:QuarterlyFinancialInformationLineItems
6	Revenue	Concept (xbrli:monetary)	duration	credit	base:SalesRevenueNet
7	Gross margin	Concept (xbrli:monetary)	duration	credit	base:GrossProfit
8	Operating income	Concept (xbrli:monetary)	duration	credit	base:OperatingIncomeLoss
9	Net income	Concept (xbrli:monetary)	duration	credit	base:NetIncomeLoss
10	Basic earnings per share	Concept (xbrli:decimalItemType)	duration	null	base:EarningsPerShareBasic
11	Diluted earnings per share	Concept (xbrli:decimalItemType)	duration	null	base:EarningsPerShareDiluted

Model Structure
Network	101270 - Disclosure - Quarterly Information (Unaudited) (Parenthetical) (Detail) (http://www.xbrlsite.com/msft/role/DisclosureQuarterlyInformationUnauditedParentheticalDetail)
Table	Quarterly Financial Information Disclosure [Abstract]

#	Label	Report Element Class	Period Type	Balance	Name
1	Quarterly Financial Information Disclosure [Abstract]	Abstract	duration	null	base:QuarterlyFinancialInformationDisclosureAbstract
2	Quarterly Financial Information [Table]	Table	duration	null	msft:QuarterlyFinancialInformationTable
3	Legal Entity [Axis]	Axis	duration	null	other:LegalEntityAxis
4	Entity [Domain]	Member	duration	null	other:EntityDomain
5	Deferred Revenue Arrangement Type	Axis	duration	null	base:DeferredRevenueArrangementTypeAxis
6	Deferred Revenue [Domain]	Member	duration	null	base:DeferredRevenueArrangementTypeDomain
7	Windows 10 Licenses	Member	duration	null	msft:WindowsTenDeferralMember
8	Restructuring Plan [Axis]	Axis	duration	null	base:RestructuringPlanAxis
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10	Sales and Marketing Restructuring Plan	Member	duration	null	msft:SalesAndMarketingRestructuringPlanMember
11	2016 Restructuring Plans	Member	duration	null	msft:TwentySixteenRestructuringPlanMember
12	Restructuring Type [Axis]	Axis	duration	null	base:RestructuringCostAndReserveAxis
13	Type of Restructuring [Domain]	Member	duration	null	base:TypeOfRestructuringDomain
14	Severance	Member	duration	null	base:EmployeeSeveranceMember
15	Statement, Business Segments	Axis	duration	null	base:StatementBusinessSegmentsAxis
16	Segments [Domain]	Member	duration	null	base:SegmentDomain
17	Phone Business	Member	duration	null	msft:PhoneBusinessMember
18	Quarterly Financial Information [Line Items]	LineItems	duration	null	msft:QuarterlyFinancialInformationLineItems
19	Revenue	Concept (xbrli:monetary)	duration	credit	base:SalesRevenueNet
20	Restructuring charges	Concept (xbrli:monetary)	duration	debit	base:RestructuringCharges
21	Decrease in operating income due to impairment, integration and restructuring	Concept (xbrli:monetary)	duration	credit	msft:ImpairmentIntegrationAndRestructuringEffectOnOperatingIncomeLossAfterTax
22	Decrease in net income due to impairment, integration and restructuring	Concept (xbrli:monetary)	duration	credit	msft:ImpairmentIntegrationAndRestructuringEffectOnEarningsAfterTax
23	Decrease in diluted earnings per share due to impairment, integration and restructuring	Concept (xbrli:decimalItemType)	duration	null	msft:ImpairmentIntegrationAndRestructuringEffectOnEarningsPerShareAfterTax
24	Asset impairment charges	Concept (xbrli:monetary)	duration	debit	base:AssetImpairmentCharges

Definition Graphs

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Table	Document And Entity Information [Abstract]

Definition Links Graph
Network	100010 - Statement - INCOME STATEMENTS (http://www.xbrlsite.com/msft/role/StatementINCOMESTATEMENTS)
Table	Income Statement [Abstract]

Definition Links Graph
Network	100020 - Statement - COMPREHENSIVE INCOME STATEMENTS (http://www.xbrlsite.com/msft/role/StatementCOMPREHENSIVEINCOMESTATEMENTS)
Table	Statement Of Income And Comprehensive Income [Abstract]

Definition Links Graph
Network	100030 - Statement - COMPREHENSIVE INCOME STATEMENTS (Parenthetical) (http://www.xbrlsite.com/msft/role/StatementCOMPREHENSIVEINCOMESTATEMENTSParenthetical)
Table	Statement Of Income And Comprehensive Income [Abstract]

Definition Links Graph
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Table	Statement Of Financial Position [Abstract]

Definition Links Graph
Network	100050 - Statement - BALANCE SHEETS (Parenthetical) (http://www.xbrlsite.com/msft/role/StatementBALANCESHEETSParenthetical)
Table	Statement Of Financial Position [Abstract]

Definition Links Graph
Network	100060 - Statement - CASH FLOWS STATEMENTS (http://www.xbrlsite.com/msft/role/StatementCASHFLOWSSTATEMENTS)
Table	Statement Of Cash Flows [Abstract]

Definition Links Graph
Network	100070 - Statement - STOCKHOLDERS' EQUITY STATEMENTS (http://www.xbrlsite.com/msft/role/StatementSTOCKHOLDERSEQUITYSTATEMENTS)
Table	Statement Of Stockholders Equity [Abstract]

Definition Links Graph
Network	100080 - Disclosure - ACCOUNTING POLICIES (http://www.xbrlsite.com/msft/role/DisclosureACCOUNTINGPOLICIES)
Table	Accounting Policies [Abstract]

Definition Links Graph
Network	100090 - Disclosure - EARNINGS PER SHARE (http://www.xbrlsite.com/msft/role/DisclosureEARNINGSPERSHARE)
Table	Earnings Per Share [Abstract]

Definition Links Graph
Network	100100 - Disclosure - OTHER INCOME (EXPENSE), NET (http://www.xbrlsite.com/msft/role/DisclosureOTHERINCOMEEXPENSENET)
Table	Other Income And Expenses [Abstract]

Definition Links Graph
Network	100110 - Disclosure - INVESTMENTS (http://www.xbrlsite.com/msft/role/DisclosureINVESTMENTS)
Table	Cash And Cash Equivalents [Abstract]

Definition Links Graph
Network	100120 - Disclosure - DERIVATIVES (http://www.xbrlsite.com/msft/role/DisclosureDERIVATIVES)
Table	Derivative Instruments And Hedging Activities Disclosure [Abstract]

Definition Links Graph
Network	100130 - Disclosure - FAIR VALUE MEASUREMENTS (http://www.xbrlsite.com/msft/role/DisclosureFAIRVALUEMEASUREMENTS)
Table	Fair Value Disclosures [Abstract]

Definition Links Graph
Network	100140 - Disclosure - INVENTORIES (http://www.xbrlsite.com/msft/role/DisclosureINVENTORIES)
Table	Inventory Disclosure [Abstract]

Definition Links Graph
Network	100150 - Disclosure - PROPERTY AND EQUIPMENT (http://www.xbrlsite.com/msft/role/DisclosurePROPERTYANDEQUIPMENT)
Table	Property Plant And Equipment [Abstract]

Definition Links Graph
Network	100160 - Disclosure - BUSINESS COMBINATIONS (http://www.xbrlsite.com/msft/role/DisclosureBUSINESSCOMBINATIONS)
Table	Business Combinations [Abstract]

Definition Links Graph
Network	100170 - Disclosure - GOODWILL (http://www.xbrlsite.com/msft/role/DisclosureGOODWILL)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

Definition Links Graph
Network	100180 - Disclosure - INTANGIBLE ASSETS (http://www.xbrlsite.com/msft/role/DisclosureINTANGIBLEASSETS)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

Definition Links Graph
Network	100190 - Disclosure - DEBT (http://www.xbrlsite.com/msft/role/DisclosureDEBT)
Table	Debt Disclosure [Abstract]

Definition Links Graph
Network	100200 - Disclosure - INCOME TAXES (http://www.xbrlsite.com/msft/role/DisclosureINCOMETAXES)
Table	Income Tax Disclosure [Abstract]

Definition Links Graph
Network	100210 - Disclosure - RESTRUCTURING CHARGES (http://www.xbrlsite.com/msft/role/DisclosureRESTRUCTURINGCHARGES)
Table	Restructuring And Related Activities [Abstract]

Definition Links Graph
Network	100220 - Disclosure - UNEARNED REVENUE (http://www.xbrlsite.com/msft/role/DisclosureUNEARNEDREVENUE)
Table	Deferred Revenue Disclosure [Abstract]

Definition Links Graph
Network	100230 - Disclosure - COMMITMENTS (http://www.xbrlsite.com/msft/role/DisclosureCOMMITMENTS)
Table	Commitments And Contingencies Disclosure [Abstract]

Definition Links Graph
Network	100240 - Disclosure - CONTINGENCIES (http://www.xbrlsite.com/msft/role/DisclosureCONTINGENCIES)
Table	Commitments And Contingencies Disclosure [Abstract]

Definition Links Graph
Network	100250 - Disclosure - STOCKHOLDERS' EQUITY (http://www.xbrlsite.com/msft/role/DisclosureSTOCKHOLDERSEQUITY)
Table	Equity [Abstract]

Definition Links Graph
Network	100260 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME (http://www.xbrlsite.com/msft/role/DisclosureACCUMULATEDOTHERCOMPREHENSIVEINCOME)
Table	Equity [Abstract]

Definition Links Graph
Network	100270 - Disclosure - EMPLOYEE STOCK AND SAVINGS PLANS (http://www.xbrlsite.com/msft/role/DisclosureEMPLOYEESTOCKANDSAVINGSPLANS)
Table	Postemployment Benefits [Abstract]

Definition Links Graph
Network	100280 - Disclosure - SEGMENT INFORMATION AND GEOGRAPHIC DATA (http://www.xbrlsite.com/msft/role/DisclosureSEGMENTINFORMATIONANDGEOGRAPHICDATA)
Table	Segment Reporting [Abstract]

Definition Links Graph
Network	100290 - Disclosure - QUARTERLY INFORMATION (UNAUDITED) (http://www.xbrlsite.com/msft/role/DisclosureQUARTERLYINFORMATIONUNAUDITED)
Table	Quarterly Financial Information Disclosure [Abstract]

Definition Links Graph
Network	100300 - Disclosure - ACCOUNTING POLICIES (Policies) (http://www.xbrlsite.com/msft/role/DisclosureACCOUNTINGPOLICIESPolicies)
Table	Accounting Policies [Abstract]

Definition Links Graph
Network	100310 - Disclosure - ACCOUNTING POLICIES (Tables) (http://www.xbrlsite.com/msft/role/DisclosureACCOUNTINGPOLICIESTables)
Table	Accounting Policies [Abstract]

Definition Links Graph
Network	100320 - Disclosure - EARNINGS PER SHARE (Tables) (http://www.xbrlsite.com/msft/role/DisclosureEARNINGSPERSHARETables)
Table	Earnings Per Share [Abstract]

Definition Links Graph
Network	100330 - Disclosure - OTHER INCOME (EXPENSE), NET (Tables) (http://www.xbrlsite.com/msft/role/DisclosureOTHERINCOMEEXPENSENETTables)
Table	Other Income And Expenses [Abstract]

Definition Links Graph
Network	100340 - Disclosure - INVESTMENTS (Tables) (http://www.xbrlsite.com/msft/role/DisclosureINVESTMENTSTables)
Table	Cash And Cash Equivalents [Abstract]

Definition Links Graph
Network	100350 - Disclosure - DERIVATIVES (Tables) (http://www.xbrlsite.com/msft/role/DisclosureDERIVATIVESTables)
Table	Derivative Instruments And Hedging Activities Disclosure [Abstract]

Definition Links Graph
Network	100360 - Disclosure - FAIR VALUE MEASUREMENTS (Tables) (http://www.xbrlsite.com/msft/role/DisclosureFAIRVALUEMEASUREMENTSTables)
Table	Fair Value Disclosures [Abstract]

Definition Links Graph
Network	100370 - Disclosure - INVENTORIES (Tables) (http://www.xbrlsite.com/msft/role/DisclosureINVENTORIESTables)
Table	Inventory Disclosure [Abstract]

Definition Links Graph
Network	100380 - Disclosure - PROPERTY AND EQUIPMENT (Tables) (http://www.xbrlsite.com/msft/role/DisclosurePROPERTYANDEQUIPMENTTables)
Table	Property Plant And Equipment [Abstract]

Definition Links Graph
Network	100390 - Disclosure - BUSINESS COMBINATIONS (Tables) (http://www.xbrlsite.com/msft/role/DisclosureBUSINESSCOMBINATIONSTables)
Table	Business Combinations [Abstract]

Definition Links Graph
Network	100400 - Disclosure - GOODWILL (Tables) (http://www.xbrlsite.com/msft/role/DisclosureGOODWILLTables)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

Definition Links Graph
Network	100410 - Disclosure - INTANGIBLE ASSETS (Tables) (http://www.xbrlsite.com/msft/role/DisclosureINTANGIBLEASSETSTables)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

Definition Links Graph
Network	100420 - Disclosure - DEBT (Tables) (http://www.xbrlsite.com/msft/role/DisclosureDEBTTables)
Table	Debt Disclosure [Abstract]

Definition Links Graph
Network	100430 - Disclosure - INCOME TAXES (Tables) (http://www.xbrlsite.com/msft/role/DisclosureINCOMETAXESTables)
Table	Income Tax Disclosure [Abstract]

Definition Links Graph
Network	100440 - Disclosure - RESTRUCTURING CHARGES (Tables) (http://www.xbrlsite.com/msft/role/DisclosureRESTRUCTURINGCHARGESTables)
Table	Restructuring And Related Activities [Abstract]

Definition Links Graph
Network	100450 - Disclosure - UNEARNED REVENUE (Tables) (http://www.xbrlsite.com/msft/role/DisclosureUNEARNEDREVENUETables)
Table	Deferred Revenue Disclosure [Abstract]

Definition Links Graph
Network	100460 - Disclosure - COMMITMENTS (Tables) (http://www.xbrlsite.com/msft/role/DisclosureCOMMITMENTSTables)
Table	Commitments And Contingencies Disclosure [Abstract]

Definition Links Graph
Network	100470 - Disclosure - STOCKHOLDERS' EQUITY (Tables) (http://www.xbrlsite.com/msft/role/DisclosureSTOCKHOLDERSEQUITYTables)
Table	Equity [Abstract]

Definition Links Graph
Network	100480 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables) (http://www.xbrlsite.com/msft/role/DisclosureACCUMULATEDOTHERCOMPREHENSIVEINCOMETables)
Table	Equity [Abstract]

Definition Links Graph
Network	100490 - Disclosure - EMPLOYEE STOCK AND SAVINGS PLANS (Tables) (http://www.xbrlsite.com/msft/role/DisclosureEMPLOYEESTOCKANDSAVINGSPLANSTables)
Table	Postemployment Benefits [Abstract]

Definition Links Graph
Network	100500 - Disclosure - SEGMENT INFORMATION AND GEOGRAPHIC DATA (Tables) (http://www.xbrlsite.com/msft/role/DisclosureSEGMENTINFORMATIONANDGEOGRAPHICDATATables)
Table	Segment Reporting [Abstract]

Definition Links Graph
Network	100510 - Disclosure - QUARTERLY INFORMATION (UNAUDITED) (Tables) (http://www.xbrlsite.com/msft/role/DisclosureQUARTERLYINFORMATIONUNAUDITEDTables)
Table	Quarterly Financial Information Disclosure [Abstract]

Definition Links Graph
Network	100520 - Disclosure - Accounting Policies - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureAccountingPoliciesAdditionalInformationDetail)
Table	Accounting Policies [Abstract]

Definition Links Graph
Network	100530 - Disclosure - Allowance for Doubtful Accounts (Detail) (http://www.xbrlsite.com/msft/role/DisclosureAllowanceForDoubtfulAccountsDetail)
Table	Organization Consolidation And Presentation Of Financial Statements [Abstract]

Definition Links Graph
Network	100540 - Disclosure - Expected Impacts of Adoption of Standards Related to Revenue Recognition and Leases to Reported Results - (Detail) (http://www.xbrlsite.com/msft/role/DisclosureExpectedImpactsOfAdoptionOfStandardsRelatedToRevenueRecognitionAndLeasesToReportedResultsDetail)
Table	Accounting Policies [Abstract]

Definition Links Graph
Network	100550 - Disclosure - Basic and Diluted Earnings Per Share (Detail) (http://www.xbrlsite.com/msft/role/DisclosureBasicAndDilutedEarningsPerShareDetail)
Table	Earnings Per Share Basic And Diluted [Abstract]

Definition Links Graph
Network	100560 - Disclosure - Components of Other Income (Expense), Net (Detail) (http://www.xbrlsite.com/msft/role/DisclosureComponentsOfOtherIncomeExpenseNetDetail)
Table	Other Income And Expenses [Abstract]

Definition Links Graph
Network	100570 - Disclosure - Net Recognized Gains (Losses) on Investments (Detail) (http://www.xbrlsite.com/msft/role/DisclosureNetRecognizedGainsLossesOnInvestmentsDetail)
Table	Statement Of Income And Comprehensive Income [Abstract]

Definition Links Graph
Network	100580 - Disclosure - Investment Components, Including Associated Derivatives (Detail) (http://www.xbrlsite.com/msft/role/DisclosureInvestmentComponentsIncludingAssociatedDerivativesDetail)
Table	Investments Debt And Equity Securities [Abstract]

Definition Links Graph
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Table	Investments Debt And Equity Securities [Abstract]

Definition Links Graph
Network	100600 - Disclosure - Investments - Secured Borrowings and Loaned Securities - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureInvestmentsSecuredBorrowingsAndLoanedSecuritiesAdditionalInformationDetail)
Table	Investments Debt And Equity Securities [Abstract]

Definition Links Graph
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Table	Investments Debt And Equity Securities [Abstract]

Definition Links Graph
Network	100620 - Disclosure - Debt Investment Maturities (Detail) (http://www.xbrlsite.com/msft/role/DisclosureDebtInvestmentMaturitiesDetail)
Table	Investments Debt And Equity Securities [Abstract]

Definition Links Graph
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Table	Derivative Instruments And Hedging Activities Disclosure [Abstract]

Definition Links Graph
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Table	Derivative Instruments And Hedging Activities Disclosure [Abstract]

Definition Links Graph
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Table	Derivative Instruments And Hedging Activities Disclosure [Abstract]

Definition Links Graph
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Table	Derivative Instruments And Hedging Activities Disclosure [Abstract]

Definition Links Graph
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Table	Derivative Instruments And Hedging Activities Disclosure [Abstract]

Definition Links Graph
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Table	Derivative Instruments And Hedging Activities Disclosure [Abstract]

Definition Links Graph
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Table	Fair Value Disclosures [Abstract]

Definition Links Graph
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Table	Fair Value Disclosures [Abstract]

Definition Links Graph
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Table	Inventory Disclosure [Abstract]

Definition Links Graph
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Table	Property Plant And Equipment [Abstract]

Definition Links Graph
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Table	Property Plant And Equipment [Abstract]

Definition Links Graph
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Table	Business Combinations [Abstract]

Definition Links Graph
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Table	Business Combinations [Abstract]

Definition Links Graph
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Table	Business Combinations [Abstract]

Definition Links Graph
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Table	Business Combinations [Abstract]

Definition Links Graph
Network	100780 - Disclosure - Revenue and Operating Loss Attributable to Acquiree, Since the Date of Acquisition (Detail) (http://www.xbrlsite.com/msft/role/DisclosureRevenueAndOperatingLossAttributableToAcquireeSinceDateOfAcquisitionDetail)
Table	Business Combinations [Abstract]

Definition Links Graph
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Table	Business Combinations [Abstract]

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Table	Goodwill And Intangible Assets Disclosure [Abstract]

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Table	Goodwill And Intangible Assets Disclosure [Abstract]

Definition Links Graph
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Table	Goodwill And Intangible Assets Disclosure [Abstract]

Definition Links Graph
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Table	Goodwill And Intangible Assets Disclosure [Abstract]

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Table	Goodwill And Intangible Assets Disclosure [Abstract]

Definition Links Graph
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Table	Goodwill And Intangible Assets Disclosure [Abstract]

Definition Links Graph
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Table	Goodwill And Intangible Assets Disclosure [Abstract]

Definition Links Graph
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Table	Debt Disclosure [Abstract]

Definition Links Graph
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Table	Debt Disclosure [Abstract]

Definition Links Graph
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Table	Debt Disclosure [Abstract]

Definition Links Graph
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Table	Debt Disclosure [Abstract]

Definition Links Graph
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Table	Income Tax Disclosure [Abstract]

Definition Links Graph
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Table	Income Tax Disclosure [Abstract]

Definition Links Graph
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Table	Income Tax Disclosure [Abstract]

Definition Links Graph
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Table	Income Tax Disclosure [Abstract]

Definition Links Graph
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Table	Income Tax Disclosure [Abstract]

Definition Links Graph
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Table	Income Tax Disclosure [Abstract]

Definition Links Graph
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Table	Income Tax Disclosure [Abstract]

Definition Links Graph
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Table	Restructuring And Related Activities [Abstract]

Definition Links Graph
Network	100990 - Disclosure - Changes in Restructuring Liability (Detail) (http://www.xbrlsite.com/msft/role/DisclosureChangesInRestructuringLiabilityDetail)
Table	Restructuring And Related Activities [Abstract]

Definition Links Graph
Network	101000 - Disclosure - Unearned Revenue by Segment (Detail) (http://www.xbrlsite.com/msft/role/DisclosureUnearnedRevenueBySegmentDetail)
Table	Deferred Revenue Disclosure [Abstract]

Definition Links Graph
Network	101010 - Disclosure - Commitments - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureCommitmentsAdditionalInformationDetail)
Table	Commitments And Contingencies Disclosure [Abstract]

Definition Links Graph
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Table	Commitments And Contingencies Disclosure [Abstract]

Definition Links Graph
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Table	Commitments And Contingencies Disclosure [Abstract]

Definition Links Graph
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Table	Commitments And Contingencies Disclosure [Abstract]

Definition Links Graph
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Table	Commitments And Contingencies Disclosure [Abstract]

Definition Links Graph
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Table	Equity [Abstract]

Definition Links Graph
Network	101070 - Disclosure - Stockholders' Equity - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureStockholdersEquityAdditionalInformationDetail)
Table	Statement Of Stockholders Equity [Abstract]

Definition Links Graph
Network	101080 - Disclosure - Share Repurchases (Detail) (http://www.xbrlsite.com/msft/role/DisclosureShareRepurchasesDetail)
Table	Equity [Abstract]

Definition Links Graph
Network	101090 - Disclosure - Dividends Declared (Detail) (http://www.xbrlsite.com/msft/role/DisclosureDividendsDeclaredDetail)
Table	Equity [Abstract]

Definition Links Graph
Network	101100 - Disclosure - Summary of Changes in Accumulated Other Comprehensive Income by Component (Detail) (http://www.xbrlsite.com/msft/role/DisclosureSummaryOfChangesInAccumulatedOtherComprehensiveIncomeByComponentDetail)
Table	Statement Of Income And Comprehensive Income [Abstract]

Definition Links Graph
Network	101110 - Disclosure - Summary of Changes in Accumulated Other Comprehensive Income by Component (Parenthetical) (Detail) (http://www.xbrlsite.com/msft/role/DisclosureSummaryOfChangesInAccumulatedOtherComprehensiveIncomeByComponentParentheticalDetail)
Table	Statement Of Income And Comprehensive Income [Abstract]

Definition Links Graph
Network	101120 - Disclosure - Employee Stock and Savings Plans - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureEmployeeStockAndSavingsPlansAdditionalInformationDetail)
Table	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Definition Links Graph
Network	101130 - Disclosure - Stock-Based Compensation Expense and Related Income Tax Benefits (Detail) (http://www.xbrlsite.com/msft/role/DisclosureStockBasedCompensationExpenseAndRelatedIncomeTaxBenefitsDetail)
Table	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Definition Links Graph
Network	101140 - Disclosure - Assumptions Used in Estimating the Fair Value of Stock Award Grants (Detail) (http://www.xbrlsite.com/msft/role/DisclosureAssumptionsUsedInEstimatingFairValueOfStockAwardGrantsDetail)
Table	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Definition Links Graph
Network	101150 - Disclosure - Stock Plan Activity (Detail) (http://www.xbrlsite.com/msft/role/DisclosureStockPlanActivityDetail)
Table	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Definition Links Graph
Network	101160 - Disclosure - Stock Plan Activity (Parenthetical) (Detail) (http://www.xbrlsite.com/msft/role/DisclosureStockPlanActivityParentheticalDetail)
Table	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Definition Links Graph
Network	101170 - Disclosure - Employee Purchased Shares (Detail) (http://www.xbrlsite.com/msft/role/DisclosureEmployeePurchasedSharesDetail)
Table	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Definition Links Graph
Network	101180 - Disclosure - Segment Revenue (Detail) (http://www.xbrlsite.com/msft/role/DisclosureSegmentRevenueDetail)
Table	Segment Reporting [Abstract]

Definition Links Graph
Network	101190 - Disclosure - Operating Income (Loss) by Segment (Detail) (http://www.xbrlsite.com/msft/role/DisclosureOperatingIncomeLossBySegmentDetail)
Table	Segment Reporting [Abstract]

Definition Links Graph
Network	101200 - Disclosure - Corporate and Other Operating Income (Loss) Activity (Detail) (http://www.xbrlsite.com/msft/role/DisclosureCorporateAndOtherOperatingIncomeLossActivityDetail)
Table	Segment Reporting [Abstract]

Definition Links Graph
Network	101210 - Disclosure - Segment Information and Geographic Data - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureSegmentInformationAndGeographicDataAdditionalInformationDetail)
Table	Segment Reporting [Abstract]

Definition Links Graph
Network	101220 - Disclosure - Revenue Classified by Major Geographic Areas (Detail) (http://www.xbrlsite.com/msft/role/DisclosureRevenueClassifiedByMajorGeographicAreasDetail)
Table	Segment Reporting [Abstract]

Definition Links Graph
Network	101230 - Disclosure - Revenue Classified by Significant Product and Service Offerings (Detail) (http://www.xbrlsite.com/msft/role/DisclosureRevenueClassifiedBySignificantProductAndServiceOfferingsDetail)
Table	Segment Reporting [Abstract]

Definition Links Graph
Network	101240 - Disclosure - Revenue Classified by Significant Product and Service Offerings (Parenthetical) (Detail) (http://www.xbrlsite.com/msft/role/DisclosureRevenueClassifiedBySignificantProductAndServiceOfferingsParentheticalDetail)
Table	Segment Reporting [Abstract]

Definition Links Graph
Network	101250 - Disclosure - Long-Lived Assets, Excluding Financial Instruments and Tax Assets, Classified by Location of Controlling Statutory Company (Detail) (http://www.xbrlsite.com/msft/role/DisclosureLongLivedAssetsExcludingFinancialInstrumentsAndTaxAssetsClassifiedByLocationOfControllingStatutoryCompanyDetail)
Table	Segment Reporting [Abstract]

Definition Links Graph
Network	101260 - Disclosure - Quarterly Information (Unaudited) (Detail) (http://www.xbrlsite.com/msft/role/DisclosureQuarterlyInformationUnauditedDetail)
Table	Quarterly Financial Information Disclosure [Abstract]

Definition Links Graph
Network	101270 - Disclosure - Quarterly Information (Unaudited) (Parenthetical) (Detail) (http://www.xbrlsite.com/msft/role/DisclosureQuarterlyInformationUnauditedParentheticalDetail)
Table	Quarterly Financial Information Disclosure [Abstract]

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) in black

Fact Table
Network	100000 - Document - Document and Entity Information (http://www.xbrlsite.com/msft/role/DocumentDocumentAndEntityInformation)
Table	Document And Entity Information [Abstract]

#	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	null	null
2	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Current Fiscal Year End Date	--06-30	null	null
3	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Document Fiscal Period Focus	FY	null	null
4	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Document Fiscal Year Focus	2017	null	null
5	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Document Period End Date	2017-06-30	null	null
6	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Document Type	10-K	null	null
7	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Entity Central Index Key	0000789019	null	null
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	null	null
10	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Entity Filer Category	Large Accelerated Filer	null	null
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	null	null
14	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Entity Tax Identification Number	911144442	null	null
15	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Entity Voluntary Filers	No	null	null
16	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Entity Well Known Seasoned Issuer	Yes	null	null
17	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Entity [Domain]	Trading Symbol	MSFT	null	null

Fact Table
Network	100010 - Statement - INCOME STATEMENTS (http://www.xbrlsite.com/msft/role/StatementINCOMESTATEMENTS)
Table	Income Statement [Abstract]

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

Fact Table
Network	100020 - Statement - COMPREHENSIVE INCOME STATEMENTS (http://www.xbrlsite.com/msft/role/StatementCOMPREHENSIVEINCOMESTATEMENTS)
Table	Statement Of Income And Comprehensive Income [Abstract]

#	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.xbrlsite.com/msft/role/StatementCOMPREHENSIVEINCOMESTATEMENTSParenthetical)
Table	Statement Of Income And Comprehensive Income [Abstract]

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

Fact Table
Network	100040 - Statement - BALANCE SHEETS (http://www.xbrlsite.com/msft/role/StatementBALANCESHEETS)
Table	Statement Of Financial Position [Abstract]

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

Fact Table
Network	100050 - Statement - BALANCE SHEETS (Parenthetical) (http://www.xbrlsite.com/msft/role/StatementBALANCESHEETSParenthetical)
Table	Statement Of Financial Position [Abstract]

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

Fact Table
Network	100060 - Statement - CASH FLOWS STATEMENTS (http://www.xbrlsite.com/msft/role/StatementCASHFLOWSSTATEMENTS)
Table	Statement Of Cash Flows [Abstract]

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

Fact Table
Network	100070 - Statement - STOCKHOLDERS' EQUITY STATEMENTS (http://www.xbrlsite.com/msft/role/StatementSTOCKHOLDERSEQUITYSTATEMENTS)
Table	Statement Of Stockholders Equity [Abstract]

#	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]	Dividends Common Stock Cash	2868000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	Equity Component [Domain]	Dividends Common Stock Cash	2842000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	Equity Component [Domain]	Dividends Common Stock Cash	2821000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Equity Component [Domain]	Dividends Common Stock Cash	2800000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	Equity Component [Domain]	Dividends Common Stock Cash	3024000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	Equity Component [Domain]	Dividends Common Stock Cash	3012000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	Equity Component [Domain]	Dividends Common Stock Cash	3009000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Equity Component [Domain]	Dividends Common Stock Cash	3006000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Retained Earnings [Member]	Dividends Common Stock Cash	10063000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Retained Earnings [Member]	Dividends Common Stock Cash	11329000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Retained Earnings [Member]	Dividends Common Stock Cash	12040000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Equity Component [Domain]	Net Income Loss	12193000000	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Equity Component [Domain]	Net Income Loss	4902000000	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Equity Component [Domain]	Net Income Loss	16798000000	iso4217:USD	-6
21	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	Equity Component [Domain]	Net Income Loss	5018000000	iso4217:USD	-6
22	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	Equity Component [Domain]	Net Income Loss	3756000000	iso4217:USD	-6
23	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Equity Component [Domain]	Net Income Loss	3122000000	iso4217:USD	-6
24	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	Equity Component [Domain]	Net Income Loss	4690000000	iso4217:USD	-6
25	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Equity Component [Domain]	Net Income Loss	21204000000	iso4217:USD	-6
26	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	Equity Component [Domain]	Net Income Loss	5200000000	iso4217:USD	-6
27	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	Equity Component [Domain]	Net Income Loss	4801000000	iso4217:USD	-6
28	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Equity Component [Domain]	Net Income Loss	6513000000	iso4217:USD	-6
29	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Retained Earnings [Member]	Net Income Loss	12193000000	iso4217:USD	-6
30	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Retained Earnings [Member]	Net Income Loss	16798000000	iso4217:USD	-6
31	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Retained Earnings [Member]	Net Income Loss	21204000000	iso4217:USD	-6
32	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Equity Component [Domain]	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent	-1186000000	iso4217:USD	-6
33	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Equity Component [Domain]	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent	-985000000	iso4217:USD	-6
34	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Equity Component [Domain]	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent	-1106000000	iso4217:USD	-6
35	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Accumulated Other Comprehensive Income [Member]	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent	-1186000000	iso4217:USD	-6
36	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Accumulated Other Comprehensive Income [Member]	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent	-985000000	iso4217:USD	-6
37	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Accumulated Other Comprehensive Income [Member]	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent	-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]	Stock Repurchased During Period Value	13209000000	iso4217:USD	-6
42	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Equity Component [Domain]	Stock Repurchased During Period Value	14800000000	iso4217:USD	-6
43	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Equity Component [Domain]	Stock Repurchased During Period Value	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]	Stock Repurchased During Period Value	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]	Stock Repurchased During Period Value	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]	Stock Repurchased During Period Value	2987000000	iso4217:USD	-6
47	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Retained Earnings [Member]	Stock Repurchased During Period Value	10744000000	iso4217:USD	-6
48	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Retained Earnings [Member]	Stock Repurchased During Period Value	12283000000	iso4217:USD	-6
49	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Retained Earnings [Member]	Stock Repurchased During Period Value	8798000000	iso4217:USD	-6
50	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Equity Component [Domain]	Stockholders Equity	80083000000	iso4217:USD	-6
51	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Component [Domain]	Stockholders Equity	71997000000	iso4217:USD	-6
52	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Component [Domain]	Stockholders Equity	72394000000	iso4217:USD	-6
53	0000789019 (http://www.sec.gov/CIK)	2014-06-30	Accumulated Other Comprehensive Income [Member]	Stockholders Equity	3708000000	iso4217:USD	-6
54	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Accumulated Other Comprehensive Income [Member]	Stockholders Equity	2522000000	iso4217:USD	-6
55	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accumulated Other Comprehensive Income [Member]	Stockholders Equity	1537000000	iso4217:USD	-6
56	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accumulated Other Comprehensive Income [Member]	Stockholders Equity	431000000	iso4217:USD	-6
57	0000789019 (http://www.sec.gov/CIK)	2014-06-30	Common Stock Including Additional Paid In Capital [Member]	Stockholders Equity	68366000000	iso4217:USD	-6
58	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Common Stock Including Additional Paid In Capital [Member]	Stockholders Equity	68465000000	iso4217:USD	-6
59	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Common Stock Including Additional Paid In Capital [Member]	Stockholders Equity	68178000000	iso4217:USD	-6
60	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Common Stock Including Additional Paid In Capital [Member]	Stockholders Equity	69315000000	iso4217:USD	-6
61	0000789019 (http://www.sec.gov/CIK)	2014-06-30	Retained Earnings [Member]	Stockholders Equity	17710000000	iso4217:USD	-6
62	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Retained Earnings [Member]	Stockholders Equity	9096000000	iso4217:USD	-6
63	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Retained Earnings [Member]	Stockholders Equity	2282000000	iso4217:USD	-6
64	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Retained Earnings [Member]	Stockholders Equity	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.xbrlsite.com/msft/role/DisclosureACCOUNTINGPOLICIES)
Table	Accounting Policies [Abstract]

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

Fact Table
Network	100090 - Disclosure - EARNINGS PER SHARE (http://www.xbrlsite.com/msft/role/DisclosureEARNINGSPERSHARE)
Table	Earnings Per Share [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureOTHERINCOMEEXPENSENET)
Table	Other Income And Expenses [Abstract]

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

Fact Table
Network	100110 - Disclosure - INVESTMENTS (http://www.xbrlsite.com/msft/role/DisclosureINVESTMENTS)
Table	Cash And Cash Equivalents [Abstract]

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

Fact Table
Network	100120 - Disclosure - DERIVATIVES (http://www.xbrlsite.com/msft/role/DisclosureDERIVATIVES)
Table	Derivative Instruments And Hedging Activities Disclosure [Abstract]

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

Fact Table
Network	100130 - Disclosure - FAIR VALUE MEASUREMENTS (http://www.xbrlsite.com/msft/role/DisclosureFAIRVALUEMEASUREMENTS)
Table	Fair Value Disclosures [Abstract]

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

Fact Table
Network	100140 - Disclosure - INVENTORIES (http://www.xbrlsite.com/msft/role/DisclosureINVENTORIES)
Table	Inventory Disclosure [Abstract]

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

Fact Table
Network	100150 - Disclosure - PROPERTY AND EQUIPMENT (http://www.xbrlsite.com/msft/role/DisclosurePROPERTYANDEQUIPMENT)
Table	Property Plant And Equipment [Abstract]

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

Fact Table
Network	100160 - Disclosure - BUSINESS COMBINATIONS (http://www.xbrlsite.com/msft/role/DisclosureBUSINESSCOMBINATIONS)
Table	Business Combinations [Abstract]

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

Fact Table
Network	100170 - Disclosure - GOODWILL (http://www.xbrlsite.com/msft/role/DisclosureGOODWILL)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

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

Fact Table
Network	100180 - Disclosure - INTANGIBLE ASSETS (http://www.xbrlsite.com/msft/role/DisclosureINTANGIBLEASSETS)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

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

Fact Table
Network	100190 - Disclosure - DEBT (http://www.xbrlsite.com/msft/role/DisclosureDEBT)
Table	Debt Disclosure [Abstract]

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

Fact Table
Network	100200 - Disclosure - INCOME TAXES (http://www.xbrlsite.com/msft/role/DisclosureINCOMETAXES)
Table	Income Tax Disclosure [Abstract]

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

Fact Table
Network	100210 - Disclosure - RESTRUCTURING CHARGES (http://www.xbrlsite.com/msft/role/DisclosureRESTRUCTURINGCHARGES)
Table	Restructuring And Related Activities [Abstract]

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

Fact Table
Network	100220 - Disclosure - UNEARNED REVENUE (http://www.xbrlsite.com/msft/role/DisclosureUNEARNEDREVENUE)
Table	Deferred Revenue Disclosure [Abstract]

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

Fact Table
Network	100230 - Disclosure - COMMITMENTS (http://www.xbrlsite.com/msft/role/DisclosureCOMMITMENTS)
Table	Commitments And Contingencies Disclosure [Abstract]

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

Fact Table
Network	100240 - Disclosure - CONTINGENCIES (http://www.xbrlsite.com/msft/role/DisclosureCONTINGENCIES)
Table	Commitments And Contingencies Disclosure [Abstract]

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

Fact Table
Network	100250 - Disclosure - STOCKHOLDERS' EQUITY (http://www.xbrlsite.com/msft/role/DisclosureSTOCKHOLDERSEQUITY)
Table	Equity [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureACCUMULATEDOTHERCOMPREHENSIVEINCOME)
Table	Equity [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureEMPLOYEESTOCKANDSAVINGSPLANS)
Table	Postemployment Benefits [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureSEGMENTINFORMATIONANDGEOGRAPHICDATA)
Table	Segment Reporting [Abstract]

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

Fact Table
Network	100290 - Disclosure - QUARTERLY INFORMATION (UNAUDITED) (http://www.xbrlsite.com/msft/role/DisclosureQUARTERLYINFORMATIONUNAUDITED)
Table	Quarterly Financial Information Disclosure [Abstract]

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

Fact Table
Network	100300 - Disclosure - ACCOUNTING POLICIES (Policies) (http://www.xbrlsite.com/msft/role/DisclosureACCOUNTINGPOLICIESPolicies)
Table	Accounting Policies [Abstract]

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

Fact Table
Network	100310 - Disclosure - ACCOUNTING POLICIES (Tables) (http://www.xbrlsite.com/msft/role/DisclosureACCOUNTINGPOLICIESTables)
Table	Accounting Policies [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureEARNINGSPERSHARETables)
Table	Earnings Per Share [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureOTHERINCOMEEXPENSENETTables)
Table	Other Income And Expenses [Abstract]

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

Fact Table
Network	100340 - Disclosure - INVESTMENTS (Tables) (http://www.xbrlsite.com/msft/role/DisclosureINVESTMENTSTables)
Table	Cash And Cash Equivalents [Abstract]

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

Fact Table
Network	100350 - Disclosure - DERIVATIVES (Tables) (http://www.xbrlsite.com/msft/role/DisclosureDERIVATIVESTables)
Table	Derivative Instruments And Hedging Activities Disclosure [Abstract]

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	)

null

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

null

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	)

null

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	)

null

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	)

null

Fact Table
Network	100360 - Disclosure - FAIR VALUE MEASUREMENTS (Tables) (http://www.xbrlsite.com/msft/role/DisclosureFAIRVALUEMEASUREMENTSTables)
Table	Fair Value Disclosures [Abstract]

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

Fact Table
Network	100370 - Disclosure - INVENTORIES (Tables) (http://www.xbrlsite.com/msft/role/DisclosureINVENTORIESTables)
Table	Inventory Disclosure [Abstract]

#	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.xbrlsite.com/msft/role/DisclosurePROPERTYANDEQUIPMENTTables)
Table	Property Plant And Equipment [Abstract]

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

Fact Table
Network	100390 - Disclosure - BUSINESS COMBINATIONS (Tables) (http://www.xbrlsite.com/msft/role/DisclosureBUSINESSCOMBINATIONSTables)
Table	Business Combinations [Abstract]

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

Linked In Corporation [Member]

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

null

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

null

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

2016-07-01 to 2017-06-30

Linked In Corporation [Member]

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

null

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

2016-07-01 to 2017-06-30

Linked In Corporation [Member]

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.

null

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

2016-07-01 to 2017-06-30

Linked In Corporation [Member]

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	)

null

Fact Table
Network	100400 - Disclosure - GOODWILL (Tables) (http://www.xbrlsite.com/msft/role/DisclosureGOODWILLTables)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

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

Fact Table
Network	100410 - Disclosure - INTANGIBLE ASSETS (Tables) (http://www.xbrlsite.com/msft/role/DisclosureINTANGIBLEASSETSTables)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

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

Fact Table
Network	100420 - Disclosure - DEBT (Tables) (http://www.xbrlsite.com/msft/role/DisclosureDEBTTables)
Table	Debt Disclosure [Abstract]

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

Fact Table
Network	100430 - Disclosure - INCOME TAXES (Tables) (http://www.xbrlsite.com/msft/role/DisclosureINCOMETAXESTables)
Table	Income Tax Disclosure [Abstract]

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

Fact Table
Network	100440 - Disclosure - RESTRUCTURING CHARGES (Tables) (http://www.xbrlsite.com/msft/role/DisclosureRESTRUCTURINGCHARGESTables)
Table	Restructuring And Related Activities [Abstract]

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

Fact Table
Network	100450 - Disclosure - UNEARNED REVENUE (Tables) (http://www.xbrlsite.com/msft/role/DisclosureUNEARNEDREVENUETables)
Table	Deferred Revenue Disclosure [Abstract]

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

Fact Table
Network	100460 - Disclosure - COMMITMENTS (Tables) (http://www.xbrlsite.com/msft/role/DisclosureCOMMITMENTSTables)
Table	Commitments And Contingencies Disclosure [Abstract]

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

Fact Table
Network	100470 - Disclosure - STOCKHOLDERS' EQUITY (Tables) (http://www.xbrlsite.com/msft/role/DisclosureSTOCKHOLDERSEQUITYTables)
Table	Equity [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureACCUMULATEDOTHERCOMPREHENSIVEINCOMETables)
Table	Equity [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureEMPLOYEESTOCKANDSAVINGSPLANSTables)
Table	Postemployment Benefits [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureSEGMENTINFORMATIONANDGEOGRAPHICDATATables)
Table	Segment Reporting [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureQUARTERLYINFORMATIONUNAUDITEDTables)
Table	Quarterly Financial Information Disclosure [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureAccountingPoliciesAdditionalInformationDetail)
Table	Accounting Policies [Abstract]

#	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	Type Of Adoption [Member]	Advertising Expense	1900000000	iso4217:USD	-8
2	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Deferred Revenue Arrangement Type [Domain]	Advertising Expense	1900000000	iso4217:USD	-8
3	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
4	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Range [Member]	Advertising Expense	1900000000	iso4217:USD	-8
5	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Scenario Unspecified [Domain]	Advertising Expense	1900000000	iso4217:USD	-8
6	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Type Of Adoption [Member]	Advertising Expense	1600000000	iso4217:USD	-8
7	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Deferred Revenue Arrangement Type [Domain]	Advertising Expense	1600000000	iso4217:USD	-8
8	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
9	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Range [Member]	Advertising Expense	1600000000	iso4217:USD	-8
10	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Unspecified [Domain]	Advertising Expense	1600000000	iso4217:USD	-8
11	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Type Of Adoption [Member]	Advertising Expense	1500000000	iso4217:USD	-8
12	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Deferred Revenue Arrangement Type [Domain]	Advertising Expense	1500000000	iso4217:USD	-8
13	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
14	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Range [Member]	Advertising Expense	1500000000	iso4217:USD	-8
15	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Unspecified [Domain]	Advertising Expense	1500000000	iso4217:USD	-8
16	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Type Of Adoption [Member]	Deferred Revenue	33909000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Deferred Revenue Arrangement Type [Domain]	Deferred Revenue	33909000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Property Plant And Equipment Type [Domain]	Deferred Revenue	33909000000	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Range [Member]	Deferred Revenue	33909000000	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Unspecified [Domain]	Deferred Revenue	33909000000	iso4217:USD	-6
21	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Type Of Adoption [Member]	Deferred Revenue	44479000000	iso4217:USD	-6
22	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Deferred Revenue Arrangement Type [Domain]	Deferred Revenue	44479000000	iso4217:USD	-6
23	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Property Plant And Equipment Type [Domain]	Deferred Revenue	44479000000	iso4217:USD	-6
24	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Range [Member]	Deferred Revenue	44479000000	iso4217:USD	-6
25	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Unspecified [Domain]	Deferred Revenue	44479000000	iso4217:USD	-6
26	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accounting Standards Update201409 [Member]	Deferred Revenue	-11716000000	iso4217:USD	-6
27	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accounting Standards Update201409 [Member]	Deferred Revenue	-17823000000	iso4217:USD	-6
28	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accounting Standards Update201602 [Member]	Deferred Revenue	0	iso4217:USD	-6
29	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accounting Standards Update201602 [Member]	Deferred Revenue	0	iso4217:USD	-6
30	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Deferred Revenue	22193000000	iso4217:USD	-6
31	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Deferred Revenue	26656000000	iso4217:USD	-6
32	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Type Of Adoption [Member]	Deferred Tax Liabilities Noncurrent	1476000000	iso4217:USD	-6
33	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Deferred Revenue Arrangement Type [Domain]	Deferred Tax Liabilities Noncurrent	1476000000	iso4217:USD	-6
34	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Property Plant And Equipment Type [Domain]	Deferred Tax Liabilities Noncurrent	1476000000	iso4217:USD	-6
35	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Range [Member]	Deferred Tax Liabilities Noncurrent	1476000000	iso4217:USD	-6
36	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Unspecified [Domain]	Deferred Tax Liabilities Noncurrent	1476000000	iso4217:USD	-6
37	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Type Of Adoption [Member]	Deferred Tax Liabilities Noncurrent	531000000	iso4217:USD	-6
38	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Deferred Revenue Arrangement Type [Domain]	Deferred Tax Liabilities Noncurrent	531000000	iso4217:USD	-6
39	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Property Plant And Equipment Type [Domain]	Deferred Tax Liabilities Noncurrent	531000000	iso4217:USD	-6
40	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Range [Member]	Deferred Tax Liabilities Noncurrent	531000000	iso4217:USD	-6
41	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Unspecified [Domain]	Deferred Tax Liabilities Noncurrent	531000000	iso4217:USD	-6
42	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accounting Standards Update201409 [Member]	Deferred Tax Liabilities Noncurrent	4837000000	iso4217:USD	-6
43	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accounting Standards Update201409 [Member]	Deferred Tax Liabilities Noncurrent	5203000000	iso4217:USD	-6
44	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accounting Standards Update201602 [Member]	Deferred Tax Liabilities Noncurrent	0	iso4217:USD	-6
45	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accounting Standards Update201602 [Member]	Deferred Tax Liabilities Noncurrent	0	iso4217:USD	-6
46	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Deferred Tax Liabilities Noncurrent	6313000000	iso4217:USD	-6
47	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Deferred Tax Liabilities Noncurrent	5734000000	iso4217:USD	-6
48	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Maximum [Member]	Finite Lived Intangible Asset Useful Life	_2511860	null	null
49	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Minimum [Member]	Finite Lived Intangible Asset Useful Life	_2512438	null	null
50	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Type Of Adoption [Member]	Income Tax Expense Benefit	6314000000	iso4217:USD	-6
51	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Deferred Revenue Arrangement Type [Domain]	Income Tax Expense Benefit	6314000000	iso4217:USD	-6
52	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Property Plant And Equipment Type [Domain]	Income Tax Expense Benefit	6314000000	iso4217:USD	-6
53	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Range [Member]	Income Tax Expense Benefit	6314000000	iso4217:USD	-6
54	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Scenario Unspecified [Domain]	Income Tax Expense Benefit	6314000000	iso4217:USD	-6
55	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Type Of Adoption [Member]	Income Tax Expense Benefit	2953000000	iso4217:USD	-6
56	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Deferred Revenue Arrangement Type [Domain]	Income Tax Expense Benefit	2953000000	iso4217:USD	-6
57	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Property Plant And Equipment Type [Domain]	Income Tax Expense Benefit	2953000000	iso4217:USD	-6
58	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Range [Member]	Income Tax Expense Benefit	2953000000	iso4217:USD	-6
59	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Unspecified [Domain]	Income Tax Expense Benefit	2953000000	iso4217:USD	-6
60	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Type Of Adoption [Member]	Income Tax Expense Benefit	1945000000	iso4217:USD	-6
61	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Deferred Revenue Arrangement Type [Domain]	Income Tax Expense Benefit	1945000000	iso4217:USD	-6
62	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Property Plant And Equipment Type [Domain]	Income Tax Expense Benefit	1945000000	iso4217:USD	-6
63	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Range [Member]	Income Tax Expense Benefit	1945000000	iso4217:USD	-6
64	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Unspecified [Domain]	Income Tax Expense Benefit	1945000000	iso4217:USD	-6
65	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Accounting Standards Update201409 [Member]	Income Tax Expense Benefit	2147000000	iso4217:USD	-6
66	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Accounting Standards Update201409 [Member]	Income Tax Expense Benefit	2467000000	iso4217:USD	-6
67	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	Income Tax Expense Benefit	0	iso4217:USD	-6
68	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	Income Tax Expense Benefit	0	iso4217:USD	-6
69	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	Income Tax Expense Benefit	5100000000	iso4217:USD	-6
70	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	Income Tax Expense Benefit	4412000000	iso4217:USD	-6
71	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Maximum [Member]	Property Plant And Equipment Useful Life	_2525154	null	null
72	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Minimum [Member]	Property Plant And Equipment Useful Life	_2525732	null	null
73	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Maximum [Member]	Property Plant And Equipment Useful Life	_2526310	null	null
74	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Minimum [Member]	Property Plant And Equipment Useful Life	_2526888	null	null
75	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Maximum [Member]	Property Plant And Equipment Useful Life	_2527466	null	null
76	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Minimum [Member]	Property Plant And Equipment Useful Life	_2528044	null	null
77	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Maximum [Member]	Property Plant And Equipment Useful Life	_2528622	null	null
78	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Minimum [Member]	Property Plant And Equipment Useful Life	_2529200	null	null
79	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Maximum [Member]	Property Plant And Equipment Useful Life	_2529778	null	null
80	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Minimum [Member]	Property Plant And Equipment Useful Life	_2530356	null	null
81	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Type Of Adoption [Member]	Sales Revenue Net	93580000000	iso4217:USD	-6
82	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Deferred Revenue Arrangement Type [Domain]	Sales Revenue Net	93580000000	iso4217:USD	-6
83	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Property Plant And Equipment Type [Domain]	Sales Revenue Net	93580000000	iso4217:USD	-6
84	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Range [Member]	Sales Revenue Net	93580000000	iso4217:USD	-6
85	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Scenario Unspecified [Domain]	Sales Revenue Net	93580000000	iso4217:USD	-6
86	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Type Of Adoption [Member]	Sales Revenue Net	20379000000	iso4217:USD	-6
87	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Deferred Revenue Arrangement Type [Domain]	Sales Revenue Net	20379000000	iso4217:USD	-6
88	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Property Plant And Equipment Type [Domain]	Sales Revenue Net	20379000000	iso4217:USD	-6
89	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Range [Member]	Sales Revenue Net	20379000000	iso4217:USD	-6
90	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Scenario Unspecified [Domain]	Sales Revenue Net	20379000000	iso4217:USD	-6
91	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Type Of Adoption [Member]	Sales Revenue Net	85320000000	iso4217:USD	-6
92	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Deferred Revenue Arrangement Type [Domain]	Sales Revenue Net	85320000000	iso4217:USD	-6
93	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Property Plant And Equipment Type [Domain]	Sales Revenue Net	85320000000	iso4217:USD	-6
94	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Range [Member]	Sales Revenue Net	85320000000	iso4217:USD	-6
95	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Unspecified [Domain]	Sales Revenue Net	85320000000	iso4217:USD	-6
96	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	Type Of Adoption [Member]	Sales Revenue Net	23796000000	iso4217:USD	-6
97	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	Deferred Revenue Arrangement Type [Domain]	Sales Revenue Net	23796000000	iso4217:USD	-6
98	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	Property Plant And Equipment Type [Domain]	Sales Revenue Net	23796000000	iso4217:USD	-6
99	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	Range [Member]	Sales Revenue Net	23796000000	iso4217:USD	-6
100	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	Scenario Unspecified [Domain]	Sales Revenue Net	23796000000	iso4217:USD	-6
101	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	Type Of Adoption [Member]	Sales Revenue Net	20531000000	iso4217:USD	-6
102	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	Deferred Revenue Arrangement Type [Domain]	Sales Revenue Net	20531000000	iso4217:USD	-6
103	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	Property Plant And Equipment Type [Domain]	Sales Revenue Net	20531000000	iso4217:USD	-6
104	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	Range [Member]	Sales Revenue Net	20531000000	iso4217:USD	-6
105	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	Scenario Unspecified [Domain]	Sales Revenue Net	20531000000	iso4217:USD	-6
106	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Type Of Adoption [Member]	Sales Revenue Net	20614000000	iso4217:USD	-6
107	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Deferred Revenue Arrangement Type [Domain]	Sales Revenue Net	20614000000	iso4217:USD	-6
108	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Property Plant And Equipment Type [Domain]	Sales Revenue Net	20614000000	iso4217:USD	-6
109	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Range [Member]	Sales Revenue Net	20614000000	iso4217:USD	-6
110	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Scenario Unspecified [Domain]	Sales Revenue Net	20614000000	iso4217:USD	-6
111	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	Type Of Adoption [Member]	Sales Revenue Net	20453000000	iso4217:USD	-6
112	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	Deferred Revenue Arrangement Type [Domain]	Sales Revenue Net	20453000000	iso4217:USD	-6
113	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	Property Plant And Equipment Type [Domain]	Sales Revenue Net	20453000000	iso4217:USD	-6
114	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	Range [Member]	Sales Revenue Net	20453000000	iso4217:USD	-6
115	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	Scenario Unspecified [Domain]	Sales Revenue Net	20453000000	iso4217:USD	-6
116	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Type Of Adoption [Member]	Sales Revenue Net	89950000000	iso4217:USD	-6
117	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Deferred Revenue Arrangement Type [Domain]	Sales Revenue Net	89950000000	iso4217:USD	-6
118	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Property Plant And Equipment Type [Domain]	Sales Revenue Net	89950000000	iso4217:USD	-6
119	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Range [Member]	Sales Revenue Net	89950000000	iso4217:USD	-6
120	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Unspecified [Domain]	Sales Revenue Net	89950000000	iso4217:USD	-6
121	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	Type Of Adoption [Member]	Sales Revenue Net	24090000000	iso4217:USD	-6
122	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	Deferred Revenue Arrangement Type [Domain]	Sales Revenue Net	24090000000	iso4217:USD	-6
123	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	Property Plant And Equipment Type [Domain]	Sales Revenue Net	24090000000	iso4217:USD	-6
124	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	Range [Member]	Sales Revenue Net	24090000000	iso4217:USD	-6
125	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	Scenario Unspecified [Domain]	Sales Revenue Net	24090000000	iso4217:USD	-6
126	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	Type Of Adoption [Member]	Sales Revenue Net	22090000000	iso4217:USD	-6
127	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	Deferred Revenue Arrangement Type [Domain]	Sales Revenue Net	22090000000	iso4217:USD	-6
128	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	Property Plant And Equipment Type [Domain]	Sales Revenue Net	22090000000	iso4217:USD	-6
129	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	Range [Member]	Sales Revenue Net	22090000000	iso4217:USD	-6
130	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	Scenario Unspecified [Domain]	Sales Revenue Net	22090000000	iso4217:USD	-6
131	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Type Of Adoption [Member]	Sales Revenue Net	23317000000	iso4217:USD	-6
132	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Deferred Revenue Arrangement Type [Domain]	Sales Revenue Net	23317000000	iso4217:USD	-6
133	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Property Plant And Equipment Type [Domain]	Sales Revenue Net	23317000000	iso4217:USD	-6
134	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Range [Member]	Sales Revenue Net	23317000000	iso4217:USD	-6
135	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Scenario Unspecified [Domain]	Sales Revenue Net	23317000000	iso4217:USD	-6
136	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Accounting Standards Update201409 [Member]	Sales Revenue Net	5834000000	iso4217:USD	-6
137	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Accounting Standards Update201409 [Member]	Sales Revenue Net	6621000000	iso4217:USD	-6
138	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	Sales Revenue Net	0	iso4217:USD	-6
139	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	Sales Revenue Net	0	iso4217:USD	-6
140	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Windows Ten Deferral [Member]	Sales Revenue Net	1300000000	iso4217:USD	-8
141	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Windows Ten Deferral [Member]	Sales Revenue Net	6600000000	iso4217:USD	-8
142	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	Windows Ten Deferral [Member]	Sales Revenue Net	1700000000	iso4217:USD	-8
143	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	Windows Ten Deferral [Member]	Sales Revenue Net	1600000000	iso4217:USD	-8
144	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Windows Ten Deferral [Member]	Sales Revenue Net	2000000000	iso4217:USD	-8
145	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	Windows Ten Deferral [Member]	Sales Revenue Net	1900000000	iso4217:USD	-8
146	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Windows Ten Deferral [Member]	Sales Revenue Net	6700000000	iso4217:USD	-8
147	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	Windows Ten Deferral [Member]	Sales Revenue Net	2000000000	iso4217:USD	-8
148	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	Windows Ten Deferral [Member]	Sales Revenue Net	1500000000	iso4217:USD	-8
149	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Windows Ten Deferral [Member]	Sales Revenue Net	1400000000	iso4217:USD	-8
150	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	Sales Revenue Net	91154000000	iso4217:USD	-6
151	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	Sales Revenue Net	96571000000	iso4217:USD	-6
152	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accounting Standards Update201409 [Member]	Accounts Receivable Net And Other Assets	4200000000	iso4217:USD	-8
153	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accounting Standards Update201409 [Member]	Accounts Receivable Net And Other Assets	2700000000	iso4217:USD	-8
154	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accounting Standards Update201602 [Member]	Operating Lease Liabilities	5200000000	iso4217:USD	-8
155	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accounting Standards Update201602 [Member]	Operating Lease Liabilities	6600000000	iso4217:USD	-8
156	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accounting Standards Update201602 [Member]	Operating Lease Right Of Use Assets	5200000000	iso4217:USD	-8
157	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accounting Standards Update201602 [Member]	Operating Lease Right Of Use Assets	6600000000	iso4217:USD	-8
158	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Windows Ten Deferral [Member]	Revenue Recognition Period	_2575368	null	null
159	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Windows Ten Deferral [Member]	Revenue Recognition Period	_2575946	null	null

Fact Table
Network	100530 - Disclosure - Allowance for Doubtful Accounts (Detail) (http://www.xbrlsite.com/msft/role/DisclosureAllowanceForDoubtfulAccountsDetail)
Table	Organization Consolidation And Presentation Of Financial Statements [Abstract]

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2014-06-30	Allowance For Doubtful Accounts [Member]	Valuation Allowances And Reserves Balance	301000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Allowance For Doubtful Accounts [Member]	Valuation Allowances And Reserves Balance	335000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Allowance For Doubtful Accounts [Member]	Valuation Allowances And Reserves Balance	426000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Allowance For Doubtful Accounts [Member]	Valuation Allowances And Reserves Balance	405000000	iso4217:USD	-6
5	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
6	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
7	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
8	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
9	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
10	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

Fact Table
Network	100540 - Disclosure - Expected Impacts of Adoption of Standards Related to Revenue Recognition and Leases to Reported Results - (Detail) (http://www.xbrlsite.com/msft/role/DisclosureExpectedImpactsOfAdoptionOfStandardsRelatedToRevenueRecognitionAndLeasesToReportedResultsDetail)
Table	Accounting Policies [Abstract]

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accounting Standards Update201409 [Member]	Accounts Receivable Net Current	2359000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accounting Standards Update201409 [Member]	Accounts Receivable Net Current	2639000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accounting Standards Update201602 [Member]	Accounts Receivable Net Current	0	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accounting Standards Update201602 [Member]	Accounts Receivable Net Current	0	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Accounts Receivable Net Current	20636000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Accounts Receivable Net Current	22431000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accounting Standards Update201409 [Member]	Deferred Revenue	-11716000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accounting Standards Update201409 [Member]	Deferred Revenue	-17823000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accounting Standards Update201602 [Member]	Deferred Revenue	0	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accounting Standards Update201602 [Member]	Deferred Revenue	0	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Deferred Revenue	22193000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Deferred Revenue	26656000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accounting Standards Update201409 [Member]	Deferred Tax Liabilities Noncurrent	4837000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accounting Standards Update201409 [Member]	Deferred Tax Liabilities Noncurrent	5203000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accounting Standards Update201602 [Member]	Deferred Tax Liabilities Noncurrent	0	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accounting Standards Update201602 [Member]	Deferred Tax Liabilities Noncurrent	0	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Deferred Tax Liabilities Noncurrent	6313000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Deferred Tax Liabilities Noncurrent	5734000000	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Accounting Standards Update201409 [Member]	Earnings Per Share Diluted	0.46	iso4217:USD/shares	2
20	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Accounting Standards Update201409 [Member]	Earnings Per Share Diluted	0.54	iso4217:USD/shares	2
21	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	Earnings Per Share Diluted	0	iso4217:USD/shares	0
22	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	Earnings Per Share Diluted	0	iso4217:USD/shares	0
23	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	Earnings Per Share Diluted	2.56	iso4217:USD/shares	2
24	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	Earnings Per Share Diluted	3.25	iso4217:USD/shares	2
25	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Accounting Standards Update201409 [Member]	Income Tax Expense Benefit	2147000000	iso4217:USD	-6
26	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Accounting Standards Update201409 [Member]	Income Tax Expense Benefit	2467000000	iso4217:USD	-6
27	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	Income Tax Expense Benefit	0	iso4217:USD	-6
28	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	Income Tax Expense Benefit	0	iso4217:USD	-6
29	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	Income Tax Expense Benefit	5100000000	iso4217:USD	-6
30	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	Income Tax Expense Benefit	4412000000	iso4217:USD	-6
31	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Accounting Standards Update201409 [Member]	Net Income Loss	3741000000	iso4217:USD	-6
32	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Accounting Standards Update201409 [Member]	Net Income Loss	4285000000	iso4217:USD	-6
33	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	Net Income Loss	0	iso4217:USD	-6
34	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	Net Income Loss	0	iso4217:USD	-6
35	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	Net Income Loss	20539000000	iso4217:USD	-6
36	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	Net Income Loss	25489000000	iso4217:USD	-6
37	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accounting Standards Update201409 [Member]	Operating Lease Liability	0	iso4217:USD	-6
38	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accounting Standards Update201409 [Member]	Operating Lease Liability	0	iso4217:USD	-6
39	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accounting Standards Update201602 [Member]	Operating Lease Liability	4257000000	iso4217:USD	-6
40	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accounting Standards Update201602 [Member]	Operating Lease Liability	5372000000	iso4217:USD	-6
41	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Operating Lease Liability	4257000000	iso4217:USD	-6
42	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Operating Lease Liability	5372000000	iso4217:USD	-6
43	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accounting Standards Update201409 [Member]	Operating Lease Right Of Use Asset	0	iso4217:USD	-6
44	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accounting Standards Update201409 [Member]	Operating Lease Right Of Use Asset	0	iso4217:USD	-6
45	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accounting Standards Update201602 [Member]	Operating Lease Right Of Use Asset	5198000000	iso4217:USD	-6
46	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accounting Standards Update201602 [Member]	Operating Lease Right Of Use Asset	6555000000	iso4217:USD	-6
47	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Operating Lease Right Of Use Asset	5198000000	iso4217:USD	-6
48	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Operating Lease Right Of Use Asset	6555000000	iso4217:USD	-6
49	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accounting Standards Update201409 [Member]	Other Assets	1872000000	iso4217:USD	-6
50	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accounting Standards Update201409 [Member]	Other Assets	32000000	iso4217:USD	-6
51	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accounting Standards Update201602 [Member]	Other Assets	0	iso4217:USD	-6
52	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accounting Standards Update201602 [Member]	Other Assets	0	iso4217:USD	-6
53	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Other Assets	11180000000	iso4217:USD	-6
54	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Other Assets	11179000000	iso4217:USD	-6
55	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accounting Standards Update201409 [Member]	Other Liabilities	17000000	iso4217:USD	-6
56	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accounting Standards Update201409 [Member]	Other Liabilities	-26000000	iso4217:USD	-6
57	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accounting Standards Update201602 [Member]	Other Liabilities	941000000	iso4217:USD	-6
58	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accounting Standards Update201602 [Member]	Other Liabilities	1183000000	iso4217:USD	-6
59	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Other Liabilities	20547000000	iso4217:USD	-6
60	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Other Liabilities	24621000000	iso4217:USD	-6
61	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Accounting Standards Update201409 [Member]	Sales Revenue Net	5834000000	iso4217:USD	-6
62	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Accounting Standards Update201409 [Member]	Sales Revenue Net	6621000000	iso4217:USD	-6
63	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	Sales Revenue Net	0	iso4217:USD	-6
64	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	Sales Revenue Net	0	iso4217:USD	-6
65	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Scenario Plan [Member]	Sales Revenue Net	91154000000	iso4217:USD	-6
66	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Scenario Plan [Member]	Sales Revenue Net	96571000000	iso4217:USD	-6
67	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accounting Standards Update201409 [Member]	Stockholders Equity	11093000000	iso4217:USD	-6
68	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accounting Standards Update201409 [Member]	Stockholders Equity	15317000000	iso4217:USD	-6
69	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accounting Standards Update201602 [Member]	Stockholders Equity	0	iso4217:USD	-6
70	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accounting Standards Update201602 [Member]	Stockholders Equity	0	iso4217:USD	-6
71	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Scenario Plan [Member]	Stockholders Equity	83090000000	iso4217:USD	-6
72	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Scenario Plan [Member]	Stockholders Equity	87711000000	iso4217:USD	-6

Fact Table
Network	100550 - Disclosure - Basic and Diluted Earnings Per Share (Detail) (http://www.xbrlsite.com/msft/role/DisclosureBasicAndDilutedEarningsPerShareDetail)
Table	Earnings Per Share Basic And Diluted [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureComponentsOfOtherIncomeExpenseNetDetail)
Table	Other Income And Expenses [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureNetRecognizedGainsLossesOnInvestmentsDetail)
Table	Statement Of Income And Comprehensive Income [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureInvestmentComponentsIncludingAssociatedDerivativesDetail)
Table	Investments Debt And Equity Securities [Abstract]

#	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]	Available For Sale Securities	123671000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Investment Type Categorization [Member]	Available For Sale Securities	139004000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	Available For Sale Securities	4808000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	Available For Sale Securities	3931000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Certificates Of Deposit [Member]	Available For Sale Securities	1000000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Certificates Of Deposit [Member]	Available For Sale Securities	1358000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	Available For Sale Securities	298000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commercial Paper [Member]	Available For Sale Securities	319000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	Available For Sale Securities	6584000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	Available For Sale Securities	4835000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	Available For Sale Securities	9813000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	Available For Sale Securities	5500000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	Available For Sale Securities	5494000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	Available For Sale Securities	5265000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Money Market Funds [Member]	Available For Sale Securities	1012000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Money Market Funds [Member]	Available For Sale Securities	1478000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S Government Agencies Debt Securities [Member]	Available For Sale Securities	90204000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S Government Agencies Debt Securities [Member]	Available For Sale Securities	111844000000	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S States And Political Subdivisions [Member]	Available For Sale Securities	342000000	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S States And Political Subdivisions [Member]	Available For Sale Securities	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	U S Government Agencies Debt Securities [Member]	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax	245000000	iso4217:USD	-6
42	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S Government Agencies Debt Securities [Member]	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	U S Government Agencies Debt Securities [Member]	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax	11000000	iso4217:USD	-6
66	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S Government Agencies Debt Securities [Member]	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	U S Government Agencies Debt Securities [Member]	Available For Sale Securities Amortized Cost	89970000000	iso4217:USD	-6
86	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S Government Agencies Debt Securities [Member]	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]	Available For Sale Securities Current	106730000000	iso4217:USD	-6
90	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Investment Type Categorization [Member]	Available For Sale Securities Current	125318000000	iso4217:USD	-6
91	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Security Investments [Member]	Available For Sale Securities Current	-3000000	iso4217:USD	-6
92	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Security Investments [Member]	Available For Sale Securities Current	0	iso4217:USD	-6
93	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	Available For Sale Securities Current	4808000000	iso4217:USD	-6
94	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	Available For Sale Securities Current	3931000000	iso4217:USD	-6
95	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Cash [Member]	Available For Sale Securities Current	0	iso4217:USD	-6
96	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Cash [Member]	Available For Sale Securities Current	0	iso4217:USD	-6
97	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Certificates Of Deposit [Member]	Available For Sale Securities Current	132000000	iso4217:USD	-6
98	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Certificates Of Deposit [Member]	Available For Sale Securities Current	386000000	iso4217:USD	-6
99	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	Available For Sale Securities Current	0	iso4217:USD	-6
100	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commercial Paper [Member]	Available For Sale Securities Current	250000000	iso4217:USD	-6
101	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	Available For Sale Securities Current	6584000000	iso4217:USD	-6
102	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	Available For Sale Securities Current	4835000000	iso4217:USD	-6
103	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	Available For Sale Securities Current	0	iso4217:USD	-6
104	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	Available For Sale Securities Current	0	iso4217:USD	-6
105	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	Available For Sale Securities Current	4763000000	iso4217:USD	-6
106	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	Available For Sale Securities Current	3761000000	iso4217:USD	-6
107	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Money Market Funds [Member]	Available For Sale Securities Current	0	iso4217:USD	-6
108	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Money Market Funds [Member]	Available For Sale Securities Current	0	iso4217:USD	-6
109	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S Government Agencies Debt Securities [Member]	Available For Sale Securities Current	90104000000	iso4217:USD	-6
110	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S Government Agencies Debt Securities [Member]	Available For Sale Securities Current	111828000000	iso4217:USD	-6
111	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S States And Political Subdivisions [Member]	Available For Sale Securities Current	342000000	iso4217:USD	-6
112	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S States And Political Subdivisions [Member]	Available For Sale Securities Current	327000000	iso4217:USD	-6
113	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Cash [Member]	Cash	3501000000	iso4217:USD	-6
114	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Cash [Member]	Cash	3624000000	iso4217:USD	-6
115	0000789019 (http://www.sec.gov/CIK)	2014-06-30	Investment Type Categorization [Member]	Cash And Cash Equivalents At Carrying Value	8669000000	iso4217:USD	-6
116	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Investment Type Categorization [Member]	Cash And Cash Equivalents At Carrying Value	5595000000	iso4217:USD	-6
117	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Investment Type Categorization [Member]	Cash And Cash Equivalents At Carrying Value	6510000000	iso4217:USD	-6
118	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Investment Type Categorization [Member]	Cash And Cash Equivalents At Carrying Value	7663000000	iso4217:USD	-6
119	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Security Investments [Member]	Cash And Cash Equivalents At Carrying Value	0	iso4217:USD	-6
120	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Security Investments [Member]	Cash And Cash Equivalents At Carrying Value	0	iso4217:USD	-6
121	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	Cash And Cash Equivalents At Carrying Value	0	iso4217:USD	-6
122	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	Cash And Cash Equivalents At Carrying Value	0	iso4217:USD	-6
123	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Cash [Member]	Cash And Cash Equivalents At Carrying Value	3501000000	iso4217:USD	-6
124	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Cash [Member]	Cash And Cash Equivalents At Carrying Value	3624000000	iso4217:USD	-6
125	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Certificates Of Deposit [Member]	Cash And Cash Equivalents At Carrying Value	868000000	iso4217:USD	-6
126	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Certificates Of Deposit [Member]	Cash And Cash Equivalents At Carrying Value	972000000	iso4217:USD	-6
127	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	Cash And Cash Equivalents At Carrying Value	298000000	iso4217:USD	-6
128	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commercial Paper [Member]	Cash And Cash Equivalents At Carrying Value	69000000	iso4217:USD	-6
129	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	Cash And Cash Equivalents At Carrying Value	0	iso4217:USD	-6
130	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	Cash And Cash Equivalents At Carrying Value	0	iso4217:USD	-6
131	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	Cash And Cash Equivalents At Carrying Value	0	iso4217:USD	-6
132	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	Cash And Cash Equivalents At Carrying Value	0	iso4217:USD	-6
133	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	Cash And Cash Equivalents At Carrying Value	731000000	iso4217:USD	-6
134	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	Cash And Cash Equivalents At Carrying Value	1504000000	iso4217:USD	-6
135	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Money Market Funds [Member]	Cash And Cash Equivalents At Carrying Value	1012000000	iso4217:USD	-6
136	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Money Market Funds [Member]	Cash And Cash Equivalents At Carrying Value	1478000000	iso4217:USD	-6
137	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S Government Agencies Debt Securities [Member]	Cash And Cash Equivalents At Carrying Value	100000000	iso4217:USD	-6
138	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S Government Agencies Debt Securities [Member]	Cash And Cash Equivalents At Carrying Value	16000000	iso4217:USD	-6
139	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S States And Political Subdivisions [Member]	Cash And Cash Equivalents At Carrying Value	0	iso4217:USD	-6
140	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S States And Political Subdivisions [Member]	Cash And Cash Equivalents At Carrying Value	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]	Equity Method Investments	615000000	iso4217:USD	-6
144	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Security Investments [Member]	Equity Method Investments	523000000	iso4217:USD	-6
145	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Investment Type Categorization [Member]	Long Term Investments	10431000000	iso4217:USD	-6
146	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Investment Type Categorization [Member]	Long Term Investments	6023000000	iso4217:USD	-6
147	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Security Investments [Member]	Long Term Investments	618000000	iso4217:USD	-6
148	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Security Investments [Member]	Long Term Investments	523000000	iso4217:USD	-6
149	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	Long Term Investments	0	iso4217:USD	-6
150	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	Long Term Investments	0	iso4217:USD	-6
151	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Cash [Member]	Long Term Investments	0	iso4217:USD	-6
152	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Cash [Member]	Long Term Investments	0	iso4217:USD	-6
153	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Certificates Of Deposit [Member]	Long Term Investments	0	iso4217:USD	-6
154	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Certificates Of Deposit [Member]	Long Term Investments	0	iso4217:USD	-6
155	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	Long Term Investments	0	iso4217:USD	-6
156	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commercial Paper [Member]	Long Term Investments	0	iso4217:USD	-6
157	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	Long Term Investments	0	iso4217:USD	-6
158	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	Long Term Investments	0	iso4217:USD	-6
159	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	Long Term Investments	9813000000	iso4217:USD	-6
160	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	Long Term Investments	5500000000	iso4217:USD	-6
161	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	Long Term Investments	0	iso4217:USD	-6
162	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	Long Term Investments	0	iso4217:USD	-6
163	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Money Market Funds [Member]	Long Term Investments	0	iso4217:USD	-6
164	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Money Market Funds [Member]	Long Term Investments	0	iso4217:USD	-6
165	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S Government Agencies Debt Securities [Member]	Long Term Investments	0	iso4217:USD	-6
166	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S Government Agencies Debt Securities [Member]	Long Term Investments	0	iso4217:USD	-6
167	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S States And Political Subdivisions [Member]	Long Term Investments	0	iso4217:USD	-6
168	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S States And Political Subdivisions [Member]	Long Term Investments	0	iso4217:USD	-6

Fact Table
Network	100590 - Disclosure - Investments - Cost Method - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureInvestmentsCostMethodAdditionalInformationDetail)
Table	Investments Debt And Equity Securities [Abstract]

#	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]	Cost Method Investments	767000000		iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Measurements Nonrecurring [Member]	Cost Method Investments	1073000000		iso4217:USD	-6

Fact Table
Network	100600 - Disclosure - Investments - Secured Borrowings and Loaned Securities - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureInvestmentsSecuredBorrowingsAndLoanedSecuritiesAdditionalInformationDetail)
Table	Investments Debt And Equity Securities [Abstract]

#	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	U S Government Agencies Debt Securities [Member]	Securities Received As Collateral	3700000000		iso4217:USD	-8

Fact Table
Network	100610 - Disclosure - Unrealized Losses on Investments (Detail) (http://www.xbrlsite.com/msft/role/DisclosureUnrealizedLossesOnInvestmentsDetail)
Table	Investments Debt And Equity Securities [Abstract]

#	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	U S Government Agencies Debt Securities [Member]	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	U S Government Agencies Debt Securities [Member]	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	U S Government Agencies Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss	11000000	iso4217:USD	-6
24	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S Government Agencies Debt Securities [Member]	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	U S Government Agencies Debt Securities [Member]	Available For Sale Securities Continuous Unrealized Loss Position Fair Value	6248000000	iso4217:USD	-6
36	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S Government Agencies Debt Securities [Member]	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	U S Government Agencies Debt Securities [Member]	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	U S Government Agencies Debt Securities [Member]	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	U S Government Agencies Debt Securities [Member]	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	U S Government Agencies Debt Securities [Member]	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	U S Government Agencies Debt Securities [Member]	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	U S Government Agencies Debt Securities [Member]	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.xbrlsite.com/msft/role/DisclosureDebtInvestmentMaturitiesDetail)
Table	Investments Debt And Equity Securities [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureDerivativesAdditionalInformationDetail)
Table	Derivative Instruments And Hedging Activities Disclosure [Abstract]

#	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	Unsecured Debt [Member]	Debt Instrument Credit Rating	AAA	null	null
2	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
3	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
4	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
5	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	_2267208	null	null
6	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	_2267786	null	null
7	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Position [Domain]	Maximum Length Of Time Foreign Currency Cash Flow Hedge	_2268364	null	null
8	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Long [Member]	Derivative Notional Amount	631000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Long [Member]	Derivative Notional Amount	19000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short [Member]	Derivative Notional Amount	162000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Long [Member]	Derivative Notional Amount	440000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Long [Member]	Derivative Notional Amount	267000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short [Member]	Derivative Notional Amount	273000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short [Member]	Derivative Notional Amount	63000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Long [Member]	Derivative Notional Amount	737000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Long [Member]	Derivative Notional Amount	1600000000	iso4217:USD	-8
17	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short [Member]	Derivative Notional Amount	986000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short [Member]	Derivative Notional Amount	1800000000	iso4217:USD	-8
19	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Long [Member]	Derivative Notional Amount	1300000000	iso4217:USD	-8
20	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Long [Member]	Derivative Notional Amount	1900000000	iso4217:USD	-8
21	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short [Member]	Derivative Notional Amount	2200000000	iso4217:USD	-8
22	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short [Member]	Derivative Notional Amount	2400000000	iso4217:USD	-8
23	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short [Member]	Derivative Notional Amount	8400000000	iso4217:USD	-8
24	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short [Member]	Derivative Notional Amount	8900000000	iso4217:USD	-8
25	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short [Member]	Derivative Notional Amount	5300000000	iso4217:USD	-8
26	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short [Member]	Derivative Notional Amount	5100000000	iso4217:USD	-8
27	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Exchange Contract [Member]	Derivative Notional Amount	12000000000	iso4217:USD	-8
28	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Exchange Contract [Member]	Derivative Notional Amount	8800000000	iso4217:USD	-8
29	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Exchange Contract [Member]	Derivative Notional Amount	11700000000	iso4217:USD	-8
30	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Exchange Contract [Member]	Derivative Notional Amount	10600000000	iso4217:USD	-8
31	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Long [Member]	Derivative Notional Amount	328000000	iso4217:USD	-6
32	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Long [Member]	Derivative Notional Amount	233000000	iso4217:USD	-6
33	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short [Member]	Derivative Notional Amount	2400000000	iso4217:USD	-8
34	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short [Member]	Derivative Notional Amount	352000000	iso4217:USD	-6
35	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Long [Member]	Derivative Notional Amount	548000000	iso4217:USD	-6
36	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Long [Member]	Derivative Notional Amount	567000000	iso4217:USD	-6
37	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Contract Type [Domain]	Financial Instrument Covenant Minimum Liquidity	1000000000	iso4217:USD	INF
38	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Longterm Debt Type [Domain]	Financial Instrument Covenant Minimum Liquidity	1000000000	iso4217:USD	INF
39	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Position [Domain]	Financial Instrument Covenant Minimum Liquidity	1000000000	iso4217:USD	INF
40	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
41	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
42	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

Fact Table
Network	100640 - Disclosure - Fair Values of Derivative Instruments (Detail) (http://www.xbrlsite.com/msft/role/DisclosureFairValuesOfDerivativeInstrumentsDetail)
Table	Derivative Instruments And Hedging Activities Disclosure [Abstract]

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity And Other Investments [Member]	Derivative Asset Fair Value Gross Liability	25000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity And Other Investments [Member]	Derivative Asset Fair Value Gross Liability	67000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Assets [Member]	Derivative Asset Fair Value Gross Liability	302000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Assets [Member]	Derivative Asset Fair Value Gross Liability	132000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Assets [Member]	Derivative Asset Fair Value Gross Liability	8000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Investments [Member]	Derivative Asset Fair Value Gross Liability	74000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Investments [Member]	Derivative Asset Fair Value Gross Liability	20000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Liabilities [Member]	Derivative Collateral Obligation To Return Cash	250000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Liabilities [Member]	Derivative Collateral Obligation To Return Cash	228000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Liabilities [Member]	Derivative Collateral Obligation To Return Cash	0	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity And Other Investments [Member]	Derivative Collateral Right To Reclaim Cash	0	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity And Other Investments [Member]	Derivative Collateral Right To Reclaim Cash	0	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Assets [Member]	Derivative Collateral Right To Reclaim Cash	0	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Assets [Member]	Derivative Collateral Right To Reclaim Cash	0	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Assets [Member]	Derivative Collateral Right To Reclaim Cash	0	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Investments [Member]	Derivative Collateral Right To Reclaim Cash	0	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Investments [Member]	Derivative Collateral Right To Reclaim Cash	0	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset	18000000	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset	67000000	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset	548000000	iso4217:USD	-6
21	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset	336000000	iso4217:USD	-6
22	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Assets [Member]	Derivative Fair Value Of Derivative Asset	6000000	iso4217:USD	-6
23	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset	69000000	iso4217:USD	-6
24	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset	100000000	iso4217:USD	-6
25	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset	18000000	iso4217:USD	-6
26	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity And Other Investments [Member]	Derivative Fair Value Of Derivative Asset	67000000	iso4217:USD	-6
27	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
28	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
29	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	18000000	iso4217:USD	-6
30	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	67000000	iso4217:USD	-6
31	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
32	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
33	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
34	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
35	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
36	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
37	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
38	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
39	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	18000000	iso4217:USD	-6
40	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	67000000	iso4217:USD	-6
41	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
42	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
43	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset	548000000	iso4217:USD	-6
44	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Assets [Member]	Derivative Fair Value Of Derivative Asset	336000000	iso4217:USD	-6
45	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
46	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
47	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
48	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
49	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
50	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
51	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	392000000	iso4217:USD	-6
52	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	133000000	iso4217:USD	-6
53	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	156000000	iso4217:USD	-6
54	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	203000000	iso4217:USD	-6
55	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
56	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
57	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	392000000	iso4217:USD	-6
58	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	133000000	iso4217:USD	-6
59	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	156000000	iso4217:USD	-6
60	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	203000000	iso4217:USD	-6
61	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Assets [Member]	Derivative Fair Value Of Derivative Asset	6000000	iso4217:USD	-6
62	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
63	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
64	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
65	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
66	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	6000000	iso4217:USD	-6
67	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
68	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
69	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	6000000	iso4217:USD	-6
70	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset	73000000	iso4217:USD	-6
71	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Investments [Member]	Derivative Fair Value Of Derivative Asset	100000000	iso4217:USD	-6
72	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	6000000	iso4217:USD	-6
73	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	5000000	iso4217:USD	-6
74	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
75	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	0	iso4217:USD	-6
76	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	23000000	iso4217:USD	-6
77	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	3000000	iso4217:USD	-6
78	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	1000000	iso4217:USD	-6
79	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	80000000	iso4217:USD	-6
80	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	33000000	iso4217:USD	-6
81	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	9000000	iso4217:USD	-6
82	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	10000000	iso4217:USD	-6
83	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	3000000	iso4217:USD	-6
84	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	1000000	iso4217:USD	-6
85	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Asset	80000000	iso4217:USD	-6
86	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	72000000	iso4217:USD	-6
87	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Asset	20000000	iso4217:USD	-6
88	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability	630000000	iso4217:USD	-6
89	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability	334000000	iso4217:USD	-6
90	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Liabilities [Member]	Derivative Fair Value Of Derivative Liability	8000000	iso4217:USD	-6
91	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability	630000000	iso4217:USD	-6
92	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Liabilities [Member]	Derivative Fair Value Of Derivative Liability	337000000	iso4217:USD	-6
93	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Credit Risk Contract [Member]	Derivative Fair Value Of Derivative Liability	5000000	iso4217:USD	-6
94	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Credit Risk Contract [Member]	Derivative Fair Value Of Derivative Liability	1000000	iso4217:USD	-6
95	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Liability	25000000	iso4217:USD	-6
96	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Liability	186000000	iso4217:USD	-6
97	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Liability	16000000	iso4217:USD	-6
98	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Liability	6000000	iso4217:USD	-6
99	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Liability	263000000	iso4217:USD	-6
100	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Liability	3000000	iso4217:USD	-6
101	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Liability	296000000	iso4217:USD	-6
102	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Liability	134000000	iso4217:USD	-6
103	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Interest Rate Contract [Member]	Derivative Fair Value Of Derivative Liability	25000000	iso4217:USD	-6
104	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Interest Rate Contract [Member]	Derivative Fair Value Of Derivative Liability	7000000	iso4217:USD	-6
105	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Liability	288000000	iso4217:USD	-6
106	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Liability	189000000	iso4217:USD	-6
107	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Liability	342000000	iso4217:USD	-6
108	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Liability	148000000	iso4217:USD	-6
109	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Liabilities [Member]	Derivative Fair Value Of Derivative Liability	8000000	iso4217:USD	-6
110	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Credit Risk Contract [Member]	Derivative Fair Value Of Derivative Liability	0	iso4217:USD	-6
111	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Liability	0	iso4217:USD	-6
112	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Contract [Member]	Derivative Fair Value Of Derivative Liability	0	iso4217:USD	-6
113	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Liability	0	iso4217:USD	-6
114	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Exchange Contract [Member]	Derivative Fair Value Of Derivative Liability	8000000	iso4217:USD	-6
115	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Interest Rate Contract [Member]	Derivative Fair Value Of Derivative Liability	0	iso4217:USD	-6
116	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Designated As Hedging Instrument [Member]	Derivative Fair Value Of Derivative Liability	0	iso4217:USD	-6
117	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Nondesignated [Member]	Derivative Fair Value Of Derivative Liability	8000000	iso4217:USD	-6
118	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Current Liabilities [Member]	Derivative Liability Fair Value Gross Asset	398000000	iso4217:USD	-6
119	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Current Liabilities [Member]	Derivative Liability Fair Value Gross Asset	221000000	iso4217:USD	-6
120	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Noncurrent Liabilities [Member]	Derivative Liability Fair Value Gross Asset	7000000	iso4217:USD	-6
121	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
122	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
123	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
124	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
125	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
126	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
127	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
128	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
129	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
130	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
131	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
132	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
133	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
134	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
135	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
136	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
137	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
138	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
139	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
140	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
141	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
142	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
143	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
144	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
145	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
146	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
147	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
148	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
149	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
150	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

Fact Table
Network	100650 - Disclosure - Gains (Losses) on Fair Value Hedges and Related Hedged Items (Detail) (http://www.xbrlsite.com/msft/role/DisclosureGainsLossesOnFairValueHedgesAndRelatedHedgedItemsDetail)
Table	Derivative Instruments And Hedging Activities Disclosure [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureGainsLossesRelatedToCashFlowHedgesDetail)
Table	Derivative Instruments And Hedging Activities Disclosure [Abstract]

#	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	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
2	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
3	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
4	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
5	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
6	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
7	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
8	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
9	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.xbrlsite.com/msft/role/DisclosureGainsLossesRelatedToCashFlowHedgesParentheticalDetail)
Table	Derivative Instruments And Hedging Activities Disclosure [Abstract]

#	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	Designated As Hedging Instrument [Member]	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax	35000000	iso4217:USD	-6
2	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
3	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.xbrlsite.com/msft/role/DisclosureNonDesignatedDerivativeGainsLossesDetail)
Table	Derivative Instruments And Hedging Activities Disclosure [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetail)
Table	Fair Value Disclosures [Abstract]

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation By Asset Class [Domain]	Assets Fair Value Disclosure Recurring	119019000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Measurements Fair Value Hierarchy [Domain]	Assets Fair Value Disclosure Recurring	119019000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation By Liability Class [Domain]	Assets Fair Value Disclosure Recurring	119019000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Right Of Offset And Netting [Domain]	Assets Fair Value Disclosure Recurring	119019000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation By Asset Class [Domain]	Assets Fair Value Disclosure Recurring	133985000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Measurements Fair Value Hierarchy [Domain]	Assets Fair Value Disclosure Recurring	133985000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation By Liability Class [Domain]	Assets Fair Value Disclosure Recurring	133985000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Right Of Offset And Netting [Domain]	Assets Fair Value Disclosure Recurring	133985000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	Assets Fair Value Disclosure Recurring	119420000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	Assets Fair Value Disclosure Recurring	134212000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	Assets Fair Value Disclosure Recurring	4803000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	Assets Fair Value Disclosure Recurring	3934000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	Assets Fair Value Disclosure Recurring	4803000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	Assets Fair Value Disclosure Recurring	3934000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Certificates Of Deposit [Member]	Assets Fair Value Disclosure Recurring	1000000000	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Certificates Of Deposit [Member]	Assets Fair Value Disclosure Recurring	1358000000	iso4217:USD	-6
21	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Certificates Of Deposit [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
22	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Certificates Of Deposit [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
23	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Certificates Of Deposit [Member]	Assets Fair Value Disclosure Recurring	1000000000	iso4217:USD	-6
24	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Certificates Of Deposit [Member]	Assets Fair Value Disclosure Recurring	1358000000	iso4217:USD	-6
25	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Certificates Of Deposit [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
26	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Certificates Of Deposit [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
27	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	Assets Fair Value Disclosure Recurring	298000000	iso4217:USD	-6
28	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commercial Paper [Member]	Assets Fair Value Disclosure Recurring	319000000	iso4217:USD	-6
29	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
30	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commercial Paper [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
31	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	Assets Fair Value Disclosure Recurring	298000000	iso4217:USD	-6
32	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commercial Paper [Member]	Assets Fair Value Disclosure Recurring	319000000	iso4217:USD	-6
33	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
34	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commercial Paper [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
35	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	Assets Fair Value Disclosure Recurring	6362000000	iso4217:USD	-6
36	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	Assets Fair Value Disclosure Recurring	4830000000	iso4217:USD	-6
37	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
38	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
39	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	Assets Fair Value Disclosure Recurring	6361000000	iso4217:USD	-6
40	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	Assets Fair Value Disclosure Recurring	4829000000	iso4217:USD	-6
41	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	Assets Fair Value Disclosure Recurring	1000000	iso4217:USD	-6
42	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	Assets Fair Value Disclosure Recurring	1000000	iso4217:USD	-6
43	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Derivative Financial Instruments Assets [Member]	Assets Fair Value Disclosure Recurring	639000000	iso4217:USD	-6
44	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Financial Instruments Assets [Member]	Assets Fair Value Disclosure Recurring	509000000	iso4217:USD	-6
45	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Derivative Financial Instruments Assets [Member]	Assets Fair Value Disclosure Recurring	6000000	iso4217:USD	-6
46	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Financial Instruments Assets [Member]	Assets Fair Value Disclosure Recurring	1000000	iso4217:USD	-6
47	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Derivative Financial Instruments Assets [Member]	Assets Fair Value Disclosure Recurring	633000000	iso4217:USD	-6
48	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Financial Instruments Assets [Member]	Assets Fair Value Disclosure Recurring	508000000	iso4217:USD	-6
49	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Derivative Financial Instruments Assets [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
50	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Financial Instruments Assets [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
51	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	Assets Fair Value Disclosure Recurring	9050000000	iso4217:USD	-6
52	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	Assets Fair Value Disclosure Recurring	4426000000	iso4217:USD	-6
53	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	Assets Fair Value Disclosure Recurring	6918000000	iso4217:USD	-6
54	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	Assets Fair Value Disclosure Recurring	2414000000	iso4217:USD	-6
55	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	Assets Fair Value Disclosure Recurring	2114000000	iso4217:USD	-6
56	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	Assets Fair Value Disclosure Recurring	1994000000	iso4217:USD	-6
57	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	Assets Fair Value Disclosure Recurring	18000000	iso4217:USD	-6
58	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	Assets Fair Value Disclosure Recurring	18000000	iso4217:USD	-6
59	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	Assets Fair Value Disclosure Recurring	5715000000	iso4217:USD	-6
60	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	Assets Fair Value Disclosure Recurring	5187000000	iso4217:USD	-6
61	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	Assets Fair Value Disclosure Recurring	10000000	iso4217:USD	-6
62	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
63	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	Assets Fair Value Disclosure Recurring	5705000000	iso4217:USD	-6
64	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	Assets Fair Value Disclosure Recurring	5187000000	iso4217:USD	-6
65	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
66	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
67	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Money Market Funds [Member]	Assets Fair Value Disclosure Recurring	1012000000	iso4217:USD	-6
68	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Money Market Funds [Member]	Assets Fair Value Disclosure Recurring	1478000000	iso4217:USD	-6
69	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Money Market Funds [Member]	Assets Fair Value Disclosure Recurring	1012000000	iso4217:USD	-6
70	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Money Market Funds [Member]	Assets Fair Value Disclosure Recurring	1478000000	iso4217:USD	-6
71	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Money Market Funds [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
72	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Money Market Funds [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
73	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Money Market Funds [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
74	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Money Market Funds [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
75	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S Government Agencies Debt Securities [Member]	Assets Fair Value Disclosure Recurring	90199000000	iso4217:USD	-6
76	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S Government Agencies Debt Securities [Member]	Assets Fair Value Disclosure Recurring	111844000000	iso4217:USD	-6
77	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S Government Agencies Debt Securities [Member]	Assets Fair Value Disclosure Recurring	86492000000	iso4217:USD	-6
78	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S Government Agencies Debt Securities [Member]	Assets Fair Value Disclosure Recurring	109228000000	iso4217:USD	-6
79	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S Government Agencies Debt Securities [Member]	Assets Fair Value Disclosure Recurring	3707000000	iso4217:USD	-6
80	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S Government Agencies Debt Securities [Member]	Assets Fair Value Disclosure Recurring	2616000000	iso4217:USD	-6
81	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S Government Agencies Debt Securities [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
82	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S Government Agencies Debt Securities [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
83	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S States And Political Subdivisions [Member]	Assets Fair Value Disclosure Recurring	342000000	iso4217:USD	-6
84	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S States And Political Subdivisions [Member]	Assets Fair Value Disclosure Recurring	327000000	iso4217:USD	-6
85	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S States And Political Subdivisions [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
86	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S States And Political Subdivisions [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
87	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S States And Political Subdivisions [Member]	Assets Fair Value Disclosure Recurring	342000000	iso4217:USD	-6
88	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S States And Political Subdivisions [Member]	Assets Fair Value Disclosure Recurring	327000000	iso4217:USD	-6
89	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S States And Political Subdivisions [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
90	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S States And Political Subdivisions [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
91	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	Assets Fair Value Disclosure Recurring	94438000000	iso4217:USD	-6
92	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	Assets Fair Value Disclosure Recurring	113121000000	iso4217:USD	-6
93	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	Assets Fair Value Disclosure Recurring	24963000000	iso4217:USD	-6
94	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	Assets Fair Value Disclosure Recurring	21072000000	iso4217:USD	-6
95	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Gross [Member]	Assets Fair Value Disclosure Recurring	19000000	iso4217:USD	-6
96	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Gross [Member]	Assets Fair Value Disclosure Recurring	19000000	iso4217:USD	-6
97	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Net [Member]	Assets Fair Value Disclosure Recurring	119019000000	iso4217:USD	-6
98	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Net [Member]	Assets Fair Value Disclosure Recurring	133985000000	iso4217:USD	-6
99	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	Assets Fair Value Disclosure Recurring	4803000000	iso4217:USD	-6
100	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	Assets Fair Value Disclosure Recurring	3934000000	iso4217:USD	-6
101	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Certificates Of Deposit [Member]	Assets Fair Value Disclosure Recurring	1000000000	iso4217:USD	-6
102	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Certificates Of Deposit [Member]	Assets Fair Value Disclosure Recurring	1358000000	iso4217:USD	-6
103	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	Assets Fair Value Disclosure Recurring	298000000	iso4217:USD	-6
104	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commercial Paper [Member]	Assets Fair Value Disclosure Recurring	319000000	iso4217:USD	-6
105	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	Assets Fair Value Disclosure Recurring	6362000000	iso4217:USD	-6
106	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	Assets Fair Value Disclosure Recurring	4830000000	iso4217:USD	-6
107	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Derivative Financial Instruments Assets [Member]	Assets Fair Value Disclosure Recurring	238000000	iso4217:USD	-6
108	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Financial Instruments Assets [Member]	Assets Fair Value Disclosure Recurring	282000000	iso4217:USD	-6
109	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	Assets Fair Value Disclosure Recurring	9050000000	iso4217:USD	-6
110	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	Assets Fair Value Disclosure Recurring	4426000000	iso4217:USD	-6
111	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	Assets Fair Value Disclosure Recurring	5715000000	iso4217:USD	-6
112	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	Assets Fair Value Disclosure Recurring	5187000000	iso4217:USD	-6
113	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Money Market Funds [Member]	Assets Fair Value Disclosure Recurring	1012000000	iso4217:USD	-6
114	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Money Market Funds [Member]	Assets Fair Value Disclosure Recurring	1478000000	iso4217:USD	-6
115	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S Government Agencies Debt Securities [Member]	Assets Fair Value Disclosure Recurring	90199000000	iso4217:USD	-6
116	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S Government Agencies Debt Securities [Member]	Assets Fair Value Disclosure Recurring	111844000000	iso4217:USD	-6
117	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S States And Political Subdivisions [Member]	Assets Fair Value Disclosure Recurring	342000000	iso4217:USD	-6
118	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S States And Political Subdivisions [Member]	Assets Fair Value Disclosure Recurring	327000000	iso4217:USD	-6
119	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Netting [Member]	Assets Fair Value Disclosure Recurring	-401000000	iso4217:USD	-6
120	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Netting [Member]	Assets Fair Value Disclosure Recurring	-227000000	iso4217:USD	-6
121	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Asset Backed Securities [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
122	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Asset Backed Securities [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
123	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Certificates Of Deposit [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
124	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Certificates Of Deposit [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
125	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
126	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Commercial Paper [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
127	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Corporate Debt Securities [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
128	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Corporate Debt Securities [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
129	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Derivative Financial Instruments Assets [Member]	Assets Fair Value Disclosure Recurring	-401000000	iso4217:USD	-6
130	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Financial Instruments Assets [Member]	Assets Fair Value Disclosure Recurring	-227000000	iso4217:USD	-6
131	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Equity Securities [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
132	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Equity Securities [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
133	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Foreign Government Debt Securities [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
134	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Government Debt Securities [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
135	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Money Market Funds [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
136	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Money Market Funds [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
137	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S Government Agencies Debt Securities [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
138	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S Government Agencies Debt Securities [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
139	0000789019 (http://www.sec.gov/CIK)	2016-06-30	U S States And Political Subdivisions [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
140	0000789019 (http://www.sec.gov/CIK)	2017-06-30	U S States And Political Subdivisions [Member]	Assets Fair Value Disclosure Recurring	0	iso4217:USD	-6
141	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Derivative Financial Instruments Liabilities [Member]	Liabilities Fair Value Disclosure Recurring	17000000	iso4217:USD	-6
142	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Financial Instruments Liabilities [Member]	Liabilities Fair Value Disclosure Recurring	0	iso4217:USD	-6
143	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Derivative Financial Instruments Liabilities [Member]	Liabilities Fair Value Disclosure Recurring	613000000	iso4217:USD	-6
144	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Financial Instruments Liabilities [Member]	Liabilities Fair Value Disclosure Recurring	345000000	iso4217:USD	-6
145	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Derivative Financial Instruments Liabilities [Member]	Liabilities Fair Value Disclosure Recurring	0	iso4217:USD	-6
146	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Financial Instruments Liabilities [Member]	Liabilities Fair Value Disclosure Recurring	39000000	iso4217:USD	-6
147	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Derivative Financial Instruments Liabilities [Member]	Liabilities Fair Value Disclosure Recurring	630000000	iso4217:USD	-6
148	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Financial Instruments Liabilities [Member]	Liabilities Fair Value Disclosure Recurring	384000000	iso4217:USD	-6
149	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Derivative Financial Instruments Liabilities [Member]	Liabilities Fair Value Disclosure Recurring	232000000	iso4217:USD	-6
150	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Derivative Financial Instruments Liabilities [Member]	Liabilities Fair Value Disclosure Recurring	156000000	iso4217:USD	-6
151	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Derivative Financial Instruments Liabilities [Member]	Liabilities Fair Value Disclosure Recurring	-398000000	iso4217:USD	-6
152	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.xbrlsite.com/msft/role/DisclosureReconciliationOfTotalAssetsMeasuredAtFairValueOnRecurringBasisToBalanceSheetPresentationDetail)
Table	Fair Value Disclosures [Abstract]

#	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]	Cash	3501000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Measurements Recurring [Member]	Cash	3624000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Fair Value Measurements Nonrecurring [Member]	Cost Method Investments	767000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Measurements Nonrecurring [Member]	Cost Method Investments	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]	Equity Method Investments	618000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Fair Value Measurements Nonrecurring [Member]	Equity Method Investments	523000000	iso4217:USD	-6

Fact Table
Network	100710 - Disclosure - Components of Inventories (Detail) (http://www.xbrlsite.com/msft/role/DisclosureComponentsOfInventoriesDetail)
Table	Inventory Disclosure [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureComponentsOfPropertyAndEquipmentDetail)
Table	Property Plant And Equipment [Abstract]

#	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.xbrlsite.com/msft/role/DisclosurePropertyAndEquipmentAdditionalInformationDetail)
Table	Property Plant And Equipment [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureBusinessCombinationsAdditionalInformationDetail)
Table	Business Combinations [Abstract]

#	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	Linked In Corporation [Member]	Business Acquisition Effective Date Of Acquisition1	2016-12-08	null	null
2	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Linked In Corporation [Member]	Business Acquisition Name Of Acquired Entity	LinkedIn	null	null
3	0000789019 (http://www.sec.gov/CIK)	2016-12-07 to 2016-12-08	Linked In Corporation [Member]	Business Combination Consideration Transferred1	27000000000	iso4217:USD	-8
4	0000789019 (http://www.sec.gov/CIK)	2016-12-07 to 2016-12-08	Linked In Corporation [Member]	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.xbrlsite.com/msft/role/DisclosureMajorClassesOfAssetsAndLiabilitiesToWhichWeAllocatedPurchasePriceDetail)
Table	Business Combinations [Abstract]

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-12-08	Linked In Corporation [Member]	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Cash And Equivalents	1328000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2016-12-08	Linked In Corporation [Member]	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Marketable Securities	2110000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-12-08	Linked In Corporation [Member]	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Other	697000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2016-12-08	Linked In Corporation [Member]	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Other	1117000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-12-08	Linked In Corporation [Member]	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deferred Tax Liabilities Noncurrent	774000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-12-08	Linked In Corporation [Member]	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangibles	7887000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2016-12-08	Linked In Corporation [Member]	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment	1529000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2016-12-08	Linked In Corporation [Member]	Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Net	27009000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-12-08	Linked In Corporation [Member]	Goodwill	16803000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2016-12-08	Linked In Corporation [Member]	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Short Term Debt	1323000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-12-08	Linked In Corporation [Member]	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Other Liabilities Net	131000000	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.xbrlsite.com/msft/role/DisclosureMajorClassesOfAssetsAndLiabilitiesToWhichWeAllocatedPurchasePriceParentheticalDetail)
Table	Business Combinations [Abstract]

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value		Unit	Rounding	Parenthetical Explanations
1	0000789019 (http://www.sec.gov/CIK)	2016-12-08	Linked In Corporation [Member]	Business Acquisition Purchase Price Allocation Goodwill Expected Tax Deductible Amount	0		iso4217:USD	INF
2	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Linked In Corporation [Member]	Debt Instrument Face Amount	18000000		iso4217:USD	-6

Fact Table
Network	100770 - Disclosure - Acquired Intangible Assets (Detail) (http://www.xbrlsite.com/msft/role/DisclosureAcquiredIntangibleAssetsDetail)
Table	Business Combinations [Abstract]

#	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	_2026666	null	null
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	_2027244	null	null
3	0000789019 (http://www.sec.gov/CIK)	2016-12-07 to 2016-12-08	Linked In Corporation [Member]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_2027822	null	null
4	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	_2028400	null	null
5	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	_2028978	null	null
6	0000789019 (http://www.sec.gov/CIK)	2016-12-07 to 2016-12-08	Marketing Related Intangible Assets [Member]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_2029556	null	null
7	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	_2030134	null	null
8	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	_2030712	null	null
9	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	_2031290	null	null
10	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	_2031868	null	null
11	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Marketing Related Intangible Assets [Member]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_2032446	null	null
12	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Marketing Related Intangible Assets [Member]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_2033024	null	null
13	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	_2033602	null	null
14	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	_2034180	null	null
15	0000789019 (http://www.sec.gov/CIK)	2016-12-08	Linked In Corporation [Member]	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangibles	7887000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2016-12-08	Contractual Rights [Member]	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangibles	23000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2016-12-08	Customer Relationships [Member]	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangibles	3607000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2016-12-08	Marketing Related Intangible Assets [Member]	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangibles	2148000000	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2016-12-08	Technology Based Intangible Assets [Member]	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangibles	2109000000	iso4217:USD	-6

Fact Table
Network	100780 - Disclosure - Revenue and Operating Loss Attributable to Acquiree, Since the Date of Acquisition (Detail) (http://www.xbrlsite.com/msft/role/DisclosureRevenueAndOperatingLossAttributableToAcquireeSinceDateOfAcquisitionDetail)
Table	Business Combinations [Abstract]

#	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	Linked In Corporation [Member]	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	Linked In Corporation [Member]	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.xbrlsite.com/msft/role/DisclosureSupplementalConsolidatedFinancialResultsOnUnauditedProFormaBasisAsIfAcquisitionHadBeenConsummatedOnBeginningOfPeriodDetail)
Table	Business Combinations [Abstract]

#	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	Linked In Corporation [Member]	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	Linked In Corporation [Member]	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	Linked In Corporation [Member]	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	Linked In Corporation [Member]	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	Linked In Corporation [Member]	Business Acquisitions Pro Forma Revenue	88652000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Linked In Corporation [Member]	Business Acquisitions Pro Forma Revenue	91668000000	iso4217:USD	-6

Fact Table
Network	100800 - Disclosure - Carrying Amount of Goodwill (Detail) (http://www.xbrlsite.com/msft/role/DisclosureCarryingAmountOfGoodwillDetail)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Segment [Domain]	Goodwill	16939000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Segment [Domain]	Goodwill	17872000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Segment [Domain]	Goodwill	35122000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Intelligent Cloud [Member]	Goodwill	4917000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Intelligent Cloud [Member]	Goodwill	5467000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Intelligent Cloud [Member]	Goodwill	5555000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2015-06-30	More Personal Computing [Member]	Goodwill	5713000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2016-06-30	More Personal Computing [Member]	Goodwill	5727000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2017-06-30	More Personal Computing [Member]	Goodwill	5828000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Productivity And Business Processes [Member]	Goodwill	6309000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Productivity And Business Processes [Member]	Goodwill	6678000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Productivity And Business Processes [Member]	Goodwill	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.xbrlsite.com/msft/role/DisclosureGoodwillAdditionalInformationDetail)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureFiniteLivedIntangibleAssetsDetail)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

#	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	Marketing Related Intangible Assets [Member]	Finite Lived Intangible Assets Accumulated Amortization	616000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Marketing Related Intangible Assets [Member]	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	Marketing Related Intangible Assets [Member]	Finite Lived Intangible Assets Gross	1869000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Marketing Related Intangible Assets [Member]	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]	Finite Lived Intangible Assets Net	78000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Contractual Rights [Member]	Finite Lived Intangible Assets Net	119000000	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Customer Relationships [Member]	Finite Lived Intangible Assets Net	80000000	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Customer Relationships [Member]	Finite Lived Intangible Assets Net	3353000000	iso4217:USD	-6
21	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Marketing Related Intangible Assets [Member]	Finite Lived Intangible Assets Net	1253000000	iso4217:USD	-6
22	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Marketing Related Intangible Assets [Member]	Finite Lived Intangible Assets Net	3187000000	iso4217:USD	-6
23	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Technology Based Intangible Assets [Member]	Finite Lived Intangible Assets Net	2322000000	iso4217:USD	-6
24	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Technology Based Intangible Assets [Member]	Finite Lived Intangible Assets Net	3447000000	iso4217:USD	-6

Fact Table
Network	100830 - Disclosure - Finite-Lived Intangible Assets (Parenthetical) (Detail) (http://www.xbrlsite.com/msft/role/DisclosureFiniteLivedIntangibleAssetsParentheticalDetail)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureIntangibleAssetsAdditionalInformationDetail)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureIntangibleAssetsAcquiredDetail)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

#	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	Contractual Rights [Member]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1970284	null	null
2	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	_1970862	null	null
3	0000789019 (http://www.sec.gov/CIK)	2016-12-07 to 2016-12-08	Marketing Related Intangible Assets [Member]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1971440	null	null
4	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	_1972018	null	null
5	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	_1972596	null	null
6	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	_1973174	null	null
7	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	_1973752	null	null
8	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Marketing Related Intangible Assets [Member]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1974330	null	null
9	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Marketing Related Intangible Assets [Member]	Acquired Finite Lived Intangible Assets Weighted Average Useful Life	_1974908	null	null
10	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	_1975486	null	null
11	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	_1976064	null	null
12	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
13	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
14	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
15	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
16	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Marketing Related Intangible Assets [Member]	Acquired Finite Lived Intangible Assets	2000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Marketing Related Intangible Assets [Member]	Acquired Finite Lived Intangible Assets	2148000000	iso4217:USD	-6
18	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
19	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

Fact Table
Network	100860 - Disclosure - Estimated Future Amortization Expense Related to Intangible Assets (Detail) (http://www.xbrlsite.com/msft/role/DisclosureEstimatedFutureAmortizationExpenseRelatedToIntangibleAssetsDetail)
Table	Goodwill And Intangible Assets Disclosure [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureDebtAdditionalInformationDetail)
Table	Debt Disclosure [Abstract]

#	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	Commercial Paper [Member]	Debt Instrument Term	_1948748	null	null
6	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Commercial Paper [Member]	Debt Instrument Term	_1949326	null	null
7	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Commercial Paper [Member]	Debt Instrument Term	_1949904	null	null
8	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Commercial Paper [Member]	Debt Instrument Term	_1950482	null	null
9	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
10	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
11	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
12	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
13	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Debt Instrument Name [Domain]	Interest Paid	620000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Short Term Debt Type [Domain]	Interest Paid	620000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Debt Instrument Name [Domain]	Interest Paid	1100000000	iso4217:USD	-8
16	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Short Term Debt Type [Domain]	Interest Paid	1100000000	iso4217:USD	-8
17	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Debt Instrument Name [Domain]	Interest Paid	1600000000	iso4217:USD	-8
18	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Short Term Debt Type [Domain]	Interest Paid	1600000000	iso4217:USD	-8
19	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.	null	null
20	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.	null	null
21	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	null	null
22	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	null	null
23	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
24	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
25	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Debt Instrument Name [Domain]	Long Term Debt	40600000000	iso4217:USD	-8
26	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Debt Type [Domain]	Long Term Debt	40600000000	iso4217:USD	-8
27	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Debt Instrument Name [Domain]	Long Term Debt	77100000000	iso4217:USD	-8
28	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Debt Type [Domain]	Long Term Debt	77100000000	iso4217:USD	-8
29	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Debt Instrument Name [Domain]	Long Term Debt Fair Value	44000000000	iso4217:USD	-8
30	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Short Term Debt Type [Domain]	Long Term Debt Fair Value	44000000000	iso4217:USD	-8
31	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Debt Instrument Name [Domain]	Long Term Debt Fair Value	80300000000	iso4217:USD	-8
32	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Short Term Debt Type [Domain]	Long Term Debt Fair Value	80300000000	iso4217:USD	-8
33	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
34	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
35	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
36	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
37	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Commercial Paper [Member]	Short Term Debt Weighted Average Interest Rate	0.0043	pure	4
38	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.xbrlsite.com/msft/role/DisclosureLongTermDebtDetail)
Table	Debt Disclosure [Abstract]

#	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	750000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Notes Four Percent Due February Twelve Twenty Fifty Five [Member]	Debt Instrument Face Amount	2250000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Notes Four Percent Due February Twelve Twenty Fifty Five [Member]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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]	Debt Instrument Face Amount	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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null
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	null	null

Fact Table
Network	100890 - Disclosure - Long-term Debt (Parenthetical) (Detail) (http://www.xbrlsite.com/msft/role/DisclosureLongTermDebtParentheticalDetail)
Table	Debt Disclosure [Abstract]

#	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]	Debt Instrument Face Amount	19800000000		iso4217:USD	-8
2	0000789019 (http://www.sec.gov/CIK)	2017-02-28	U S D Debt Issued In Period [Member]	Debt Instrument Face Amount	17000000000		iso4217:USD	-8

Fact Table
Network	100900 - Disclosure - Maturities of Long-term Debt (Detail) (http://www.xbrlsite.com/msft/role/DisclosureMaturitiesOfLongTermDebtDetail)
Table	Debt Disclosure [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureProvisionForIncomeTaxesDetail)
Table	Income Tax Disclosure [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureIncomeTaxesAdditionalInformationDetail)
Table	Income Tax Disclosure [Abstract]

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
1	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Income Statement Location [Domain]	Accrued Income Taxes Noncurrent	11800000000	iso4217:USD	-8
2	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Income Tax Authority [Domain]	Accrued Income Taxes Noncurrent	11800000000	iso4217:USD	-8
3	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Statement Location [Domain]	Accrued Income Taxes Noncurrent	13500000000	iso4217:USD	-8
4	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Tax Authority [Domain]	Accrued Income Taxes Noncurrent	13500000000	iso4217:USD	-8
5	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
6	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
7	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
8	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
9	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Income Statement Location [Domain]	Deferred Tax Assets Operating Loss Carryforwards	4252000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Income Tax Authority [Domain]	Deferred Tax Assets Operating Loss Carryforwards	4252000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Statement Location [Domain]	Deferred Tax Assets Operating Loss Carryforwards	4809000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Tax Authority [Domain]	Deferred Tax Assets Operating Loss Carryforwards	4809000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Restatement Adjustment [Member]	Deferred Tax Assets Operating Loss Carryforwards	2500000000	iso4217:USD	-8
14	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Income Statement Location [Domain]	Deferred Tax Assets Valuation Allowance	4729000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Income Tax Authority [Domain]	Deferred Tax Assets Valuation Allowance	4729000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Statement Location [Domain]	Deferred Tax Assets Valuation Allowance	3310000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Tax Authority [Domain]	Deferred Tax Assets Valuation Allowance	3310000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Restatement Adjustment [Member]	Deferred Tax Assets Valuation Allowance	2500000000	iso4217:USD	-8
19	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
20	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
21	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Income Statement Location [Domain]	Income Loss From Continuing Operations Before Income Taxes Domestic	7363000000	iso4217:USD	-6
22	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Income Tax Authority [Domain]	Income Loss From Continuing Operations Before Income Taxes Domestic	7363000000	iso4217:USD	-6
23	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Income Statement Location [Domain]	Income Loss From Continuing Operations Before Income Taxes Domestic	-325000000	iso4217:USD	-6
24	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Income Tax Authority [Domain]	Income Loss From Continuing Operations Before Income Taxes Domestic	-325000000	iso4217:USD	-6
25	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Income Statement Location [Domain]	Income Loss From Continuing Operations Before Income Taxes Domestic	453000000	iso4217:USD	-6
26	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Income Tax Authority [Domain]	Income Loss From Continuing Operations Before Income Taxes Domestic	453000000	iso4217:USD	-6
27	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Windows Ten Deferral [Member]	Income Loss From Continuing Operations Before Income Taxes Domestic	6000000000	iso4217:USD	-8
28	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Windows Ten Deferral [Member]	Income Loss From Continuing Operations Before Income Taxes Domestic	6400000000	iso4217:USD	-8
29	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Phone Business [Member]	Income Loss From Continuing Operations Before Income Taxes Domestic	-1100000000	iso4217:USD	-8
30	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Income Statement Location [Domain]	Income Loss From Continuing Operations Before Income Taxes Foreign	11144000000	iso4217:USD	-6
31	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Income Tax Authority [Domain]	Income Loss From Continuing Operations Before Income Taxes Foreign	11144000000	iso4217:USD	-6
32	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Income Statement Location [Domain]	Income Loss From Continuing Operations Before Income Taxes Foreign	20076000000	iso4217:USD	-6
33	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Income Tax Authority [Domain]	Income Loss From Continuing Operations Before Income Taxes Foreign	20076000000	iso4217:USD	-6
34	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Income Statement Location [Domain]	Income Loss From Continuing Operations Before Income Taxes Foreign	22696000000	iso4217:USD	-6
35	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Income Tax Authority [Domain]	Income Loss From Continuing Operations Before Income Taxes Foreign	22696000000	iso4217:USD	-6
36	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Windows Ten Deferral [Member]	Income Loss From Continuing Operations Before Income Taxes Foreign	588000000	iso4217:USD	-6
37	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Windows Ten Deferral [Member]	Income Loss From Continuing Operations Before Income Taxes Foreign	317000000	iso4217:USD	-6
38	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Phone Business [Member]	Income Loss From Continuing Operations Before Income Taxes Foreign	-8900000000	iso4217:USD	-8
39	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
40	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
41	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
42	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
43	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
44	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
45	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Statement Location [Domain]	Operating Loss Carryforwards	13700000000	iso4217:USD	-8
46	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Tax Authority [Domain]	Operating Loss Carryforwards	13700000000	iso4217:USD	-8
47	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Foreign Country [Member]	Operating Loss Carryforwards	11100000000	iso4217:USD	-8
48	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Statement Location [Domain]	Undistributed Earnings Of Foreign Subsidiaries	142000000000	iso4217:USD	-9
49	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Tax Authority [Domain]	Undistributed Earnings Of Foreign Subsidiaries	142000000000	iso4217:USD	-9
50	0000789019 (http://www.sec.gov/CIK)	2014-06-30	Income Statement Location [Domain]	Unrecognized Tax Benefits	8714000000	iso4217:USD	-6
51	0000789019 (http://www.sec.gov/CIK)	2014-06-30	Income Tax Authority [Domain]	Unrecognized Tax Benefits	8714000000	iso4217:USD	-6
52	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Income Statement Location [Domain]	Unrecognized Tax Benefits	9599000000	iso4217:USD	-6
53	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Income Tax Authority [Domain]	Unrecognized Tax Benefits	9599000000	iso4217:USD	-6
54	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Income Statement Location [Domain]	Unrecognized Tax Benefits	10164000000	iso4217:USD	-6
55	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Income Tax Authority [Domain]	Unrecognized Tax Benefits	10164000000	iso4217:USD	-6
56	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Statement Location [Domain]	Unrecognized Tax Benefits	11737000000	iso4217:USD	-6
57	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Income Tax Authority [Domain]	Unrecognized Tax Benefits	11737000000	iso4217:USD	-6
58	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
59	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
60	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
61	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
62	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
63	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
64	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
65	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
66	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
67	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
68	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
69	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
70	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
71	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
72	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
73	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
74	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
75	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
76	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
77	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
78	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

Fact Table
Network	100930 - Disclosure - Income (Loss) Before Income Taxes (Detail) (http://www.xbrlsite.com/msft/role/DisclosureIncomeLossBeforeIncomeTaxesDetail)
Table	Income Tax Disclosure [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureDifferenceBetweenIncomeTaxesComputedAtFederalStatutoryRateAndProvisionForIncomeTaxesDetail)
Table	Income Tax Disclosure [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureDeferredIncomeTaxAssetsAndLiabilitiesDetail)
Table	Income Tax Disclosure [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureChangesInUnrecognizedTaxBenefitsDetail)
Table	Income Tax Disclosure [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureIncomeTaxesAdditionalInformationRegardingExaminationsDetail)
Table	Income Tax Disclosure [Abstract]

#	Reporting Entity [Axis]	Period [Axis]	Scenario [Axis]	Concept	Fact Value	Unit	Rounding
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	null	null
2	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	null	null
3	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	null	null
4	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	null	null
5	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Foreign Country [Member]	Open Tax Year	1996	null	null
6	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Foreign Country [Member]	Open Tax Year	2017	null	null
7	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Internal Revenue Service I R S [Member]	Open Tax Year	2010	null	null
8	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Internal Revenue Service I R S [Member]	Open Tax Year	2016	null	null

Fact Table
Network	100980 - Disclosure - Restructuring Charges - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureRestructuringChargesAdditionalInformationDetail)
Table	Restructuring And Related Activities [Abstract]

#	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	null	null
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	null	null
3	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Twenty Sixteen Restructuring Plan [Member]	Restructuring And Related Activities Completion Date	2017-06-30	null	null
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	Twenty Sixteen Restructuring Plan [Member]	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)	2016-07-01 to 2017-06-30	Twenty Seventeen Restructuring Plan [Member]	Restructuring Charges	306000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Phone Hardware Restructuring Plan [Member]	Restructuring Charges	780000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Twenty Sixteen Restructuring Plan [Member]	Restructuring Charges	501000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Twenty Sixteen Restructuring Plan [Member]	Restructuring Charges	480000000	iso4217:USD	-6
13	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.xbrlsite.com/msft/role/DisclosureChangesInRestructuringLiabilityDetail)
Table	Restructuring And Related Activities [Abstract]

#	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)	2016-07-01 to 2017-06-30	Other Restructuring [Member]	Restructuring Charges	0	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Employee Severance [Member]	Restructuring Reserve	470000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Employee Severance [Member]	Restructuring Reserve	373000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Other Restructuring [Member]	Restructuring Reserve	239000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Other Restructuring [Member]	Restructuring Reserve	59000000	iso4217:USD	-6
9	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
10	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.xbrlsite.com/msft/role/DisclosureUnearnedRevenueBySegmentDetail)
Table	Deferred Revenue Disclosure [Abstract]

#	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)	2017-06-30	Operating Segments [Member]	Deferred Revenue	13464000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Operating Segments [Member]	Deferred Revenue	3334000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Operating Segments [Member]	Deferred Revenue	3420000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Operating Segments [Member]	Deferred Revenue	12497000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Operating Segments [Member]	Deferred Revenue	14291000000	iso4217:USD	-6

Fact Table
Network	101010 - Disclosure - Commitments - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureCommitmentsAdditionalInformationDetail)
Table	Commitments And Contingencies Disclosure [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureFutureMinimumRentalCommitmentsUnderNonCancellableOperatingLeasesDetail)
Table	Commitments And Contingencies Disclosure [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureFutureMinimumLeasePaymentsUnderNonCancellableCapitalLeasesDetail)
Table	Commitments And Contingencies Disclosure [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureFutureMinimumLeasePaymentsUnderNonCancellableCapitalLeasesParentheticalDetail)
Table	Commitments And Contingencies Disclosure [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureContingenciesAdditionalInformationDetail)
Table	Commitments And Contingencies Disclosure [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureSharesOfCommonStockOutstandingDetail)
Table	Equity [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureStockholdersEquityAdditionalInformationDetail)
Table	Statement Of Stockholders Equity [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureShareRepurchasesDetail)
Table	Equity [Abstract]

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

Fact Table
Network	101090 - Disclosure - Dividends Declared (Detail) (http://www.xbrlsite.com/msft/role/DisclosureDividendsDeclaredDetail)
Table	Equity [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureSummaryOfChangesInAccumulatedOtherComprehensiveIncomeByComponentDetail)
Table	Statement Of Income And Comprehensive Income [Abstract]

#	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]	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent	-1383000000	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 Net Of Tax Portion Attributable To Parent	-519000000	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 Net Of Tax Portion Attributable To Parent	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]	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent	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]	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent	-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]	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent	-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]	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent	-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]	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent	-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]	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent	-1116000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Accumulated Other Comprehensive Income [Member]	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent	-1186000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Accumulated Other Comprehensive Income [Member]	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent	-985000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Accumulated Other Comprehensive Income [Member]	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent	-1106000000	iso4217:USD	-6
19	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
20	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
21	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
22	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
23	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
24	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
25	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
26	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
27	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
28	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
29	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
30	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
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 Tax	15000000	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 Tax	36000000	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 Tax	9000000	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 Tax	256000000	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 Tax	241000000	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 Tax	880000000	iso4217:USD	-6
37	0000789019 (http://www.sec.gov/CIK)	2014-06-30	Accumulated Translation Adjustment And Other [Member]	Stockholders Equity	146000000	iso4217:USD	-6
38	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Accumulated Translation Adjustment And Other [Member]	Stockholders Equity	-1237000000	iso4217:USD	-6
39	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accumulated Translation Adjustment And Other [Member]	Stockholders Equity	-1756000000	iso4217:USD	-6
40	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accumulated Translation Adjustment And Other [Member]	Stockholders Equity	-1528000000	iso4217:USD	-6
41	0000789019 (http://www.sec.gov/CIK)	2014-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	Stockholders Equity	31000000	iso4217:USD	-6
42	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	Stockholders Equity	590000000	iso4217:USD	-6
43	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	Stockholders Equity	352000000	iso4217:USD	-6
44	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]	Stockholders Equity	134000000	iso4217:USD	-6
45	0000789019 (http://www.sec.gov/CIK)	2014-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	Stockholders Equity	3531000000	iso4217:USD	-6
46	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	Stockholders Equity	3169000000	iso4217:USD	-6
47	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	Stockholders Equity	2941000000	iso4217:USD	-6
48	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accumulated Net Unrealized Investment Gain Loss [Member]	Stockholders Equity	1825000000	iso4217:USD	-6
49	0000789019 (http://www.sec.gov/CIK)	2014-06-30	Accumulated Other Comprehensive Income [Member]	Stockholders Equity	3708000000	iso4217:USD	-6
50	0000789019 (http://www.sec.gov/CIK)	2015-06-30	Accumulated Other Comprehensive Income [Member]	Stockholders Equity	2522000000	iso4217:USD	-6
51	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Accumulated Other Comprehensive Income [Member]	Stockholders Equity	1537000000	iso4217:USD	-6
52	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Accumulated Other Comprehensive Income [Member]	Stockholders Equity	431000000	iso4217:USD	-6

Fact Table
Network	101110 - Disclosure - Summary of Changes in Accumulated Other Comprehensive Income by Component (Parenthetical) (Detail) (http://www.xbrlsite.com/msft/role/DisclosureSummaryOfChangesInAccumulatedOtherComprehensiveIncomeByComponentParentheticalDetail)
Table	Statement Of Income And Comprehensive Income [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureEmployeeStockAndSavingsPlansAdditionalInformationDetail)
Table	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

#	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)	2015-07-01 to 2015-12-31	I R S Compensation Limit [Member]	Defined Contribution Plan Employer Matching Contribution Percent	0.03	pure	INF
12	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
13	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Maximum [Member]	Defined Contribution Plan Employer Matching Contribution Percent	0.03	pure	INF
14	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-12-31	Maximum [Member]	Defined Contribution Plan Employer Matching Contribution Percent	0.03	pure	INF
15	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
16	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
17	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
18	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 Employer Matching Contribution Percent Of Match	0.5	pure	INF
19	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 Employer Matching Contribution Percent Of Match	0.5	pure	INF
20	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Plan Name [Domain]	Defined Contribution Plan Employer Matching Contribution Percent Of Match	0.5	pure	INF
21	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-12-31	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
22	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-12-31	Other Postretirement Benefits Individual Contracts Type Of Deferred Compensation [Domain]	Defined Contribution Plan Employer Matching Contribution Percent Of Match	0.5	pure	INF
23	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-12-31	Plan Name [Domain]	Defined Contribution Plan Employer Matching Contribution Percent Of Match	0.5	pure	INF
24	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
25	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	_1602266	null	null
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	_1602844	null	null
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	_1603422	null	null
28	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	_1604000	null	null
29	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	_1604578	null	null
30	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 Grants In Period Weighted Average Grant Date Fair Value	42.36	iso4217:USD/shares	2
31	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 Grants In Period Weighted Average Grant Date Fair Value	41.51	iso4217:USD/shares	2
32	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 Grants In Period Weighted Average Grant Date Fair Value	55.64	iso4217:USD/shares	2
33	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
34	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
35	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
36	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
37	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
38	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
39	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
40	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
41	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
42	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
43	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.xbrlsite.com/msft/role/DisclosureStockBasedCompensationExpenseAndRelatedIncomeTaxBenefitsDetail)
Table	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureAssumptionsUsedInEstimatingFairValueOfStockAwardGrantsDetail)
Table	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

#	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	Maximum [Member]	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	Maximum [Member]	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	Maximum [Member]	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	Minimum [Member]	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	Minimum [Member]	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	Minimum [Member]	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.xbrlsite.com/msft/role/DisclosureStockPlanActivityDetail)
Table	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

#	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 Forfeited In Period	20000000	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 Forfeitures Weighted Average Grant Date Fair Value	43.71	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 Grants In Period	84000000	shares	-6
4	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 Grants In Period Weighted Average Grant Date Fair Value	42.36	iso4217:USD/shares	2
5	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 Grants In Period Weighted Average Grant Date Fair Value	41.51	iso4217:USD/shares	2
6	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 Grants In Period Weighted Average Grant Date Fair Value	55.64	iso4217:USD/shares	2
7	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Restricted Stock [Member]	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number	194000000	shares	-6
8	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Restricted Stock [Member]	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number	201000000	shares	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-06-30	Restricted Stock [Member]	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value	36.92	iso4217:USD/shares	2
10	0000789019 (http://www.sec.gov/CIK)	2017-06-30	Restricted Stock [Member]	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value	46.32	iso4217:USD/shares	2
11	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
12	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
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 Assumed Acquisition In Period	23000000	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 Assumed In Acquisitions Weighted Average Grant Date Fair Value	59.09	iso4217:USD/shares	2

Fact Table
Network	101160 - Disclosure - Stock Plan Activity (Parenthetical) (Detail) (http://www.xbrlsite.com/msft/role/DisclosureStockPlanActivityParentheticalDetail)
Table	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

#	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]	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period	1000000	shares	-6
2	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Performance Shares [Member]	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period	1000000	shares	-6
3	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 Equity Instruments Other Than Options Grants In Period	2000000	shares	-6

Fact Table
Network	101170 - Disclosure - Employee Purchased Shares (Detail) (http://www.xbrlsite.com/msft/role/DisclosureEmployeePurchasedSharesDetail)
Table	Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

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

Fact Table
Network	101180 - Disclosure - Segment Revenue (Detail) (http://www.xbrlsite.com/msft/role/DisclosureSegmentRevenueDetail)
Table	Segment Reporting [Abstract]

#	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]	Sales Revenue Net	0	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Corporate And Reconciling Items [Member]	Sales Revenue Net	-6643000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Corporate And Reconciling Items [Member]	Sales Revenue Net	-6707000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Operating Segments [Member]	Sales Revenue Net	23715000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Operating Segments [Member]	Sales Revenue Net	25042000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Operating Segments [Member]	Sales Revenue Net	27440000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Operating Segments [Member]	Sales Revenue Net	43435000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Operating Segments [Member]	Sales Revenue Net	40434000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Operating Segments [Member]	Sales Revenue Net	38773000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Operating Segments [Member]	Sales Revenue Net	26430000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Operating Segments [Member]	Sales Revenue Net	26487000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Operating Segments [Member]	Sales Revenue Net	30444000000	iso4217:USD	-6

Fact Table
Network	101190 - Disclosure - Operating Income (Loss) by Segment (Detail) (http://www.xbrlsite.com/msft/role/DisclosureOperatingIncomeLossBySegmentDetail)
Table	Segment Reporting [Abstract]

#	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]	Operating Income Loss	-10011000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Corporate And Reconciling Items [Member]	Operating Income Loss	-7753000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Corporate And Reconciling Items [Member]	Operating Income Loss	-7013000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Corporate And Reconciling Items [Member]	Operating Income Loss	0	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Corporate And Reconciling Items [Member]	Operating Income Loss	-6643000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Corporate And Reconciling Items [Member]	Operating Income Loss	-6707000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Corporate And Reconciling Items [Member]	Operating Income Loss	-10011000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Corporate And Reconciling Items [Member]	Operating Income Loss	-1110000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Corporate And Reconciling Items [Member]	Operating Income Loss	-306000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Operating Segments [Member]	Operating Income Loss	9803000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Operating Segments [Member]	Operating Income Loss	9315000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Operating Segments [Member]	Operating Income Loss	9138000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Operating Segments [Member]	Operating Income Loss	5095000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Operating Segments [Member]	Operating Income Loss	6202000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Operating Segments [Member]	Operating Income Loss	8288000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Operating Segments [Member]	Operating Income Loss	13274000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Operating Segments [Member]	Operating Income Loss	12418000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Operating Segments [Member]	Operating Income Loss	11913000000	iso4217:USD	-6

Fact Table
Network	101200 - Disclosure - Corporate and Other Operating Income (Loss) Activity (Detail) (http://www.xbrlsite.com/msft/role/DisclosureCorporateAndOtherOperatingIncomeLossActivityDetail)
Table	Segment Reporting [Abstract]

#	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]	Operating Income Loss	-10011000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Corporate And Reconciling Items [Member]	Operating Income Loss	-7753000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Corporate And Reconciling Items [Member]	Operating Income Loss	-7013000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Corporate And Reconciling Items [Member]	Operating Income Loss	0	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Corporate And Reconciling Items [Member]	Operating Income Loss	-6643000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Corporate And Reconciling Items [Member]	Operating Income Loss	-6707000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Corporate And Reconciling Items [Member]	Operating Income Loss	-10011000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Corporate And Reconciling Items [Member]	Operating Income Loss	-1110000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Corporate And Reconciling Items [Member]	Operating Income Loss	-306000000	iso4217:USD	-6

Fact Table
Network	101210 - Disclosure - Segment Information and Geographic Data - Additional Information (Detail) (http://www.xbrlsite.com/msft/role/DisclosureSegmentInformationAndGeographicDataAdditionalInformationDetail)
Table	Segment Reporting [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureRevenueClassifiedByMajorGeographicAreasDetail)
Table	Segment Reporting [Abstract]

#	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]	Sales Revenue Net	93580000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Segment Geographical [Domain]	Sales Revenue Net	20379000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Segment Geographical [Domain]	Sales Revenue Net	85320000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	Segment Geographical [Domain]	Sales Revenue Net	23796000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	Segment Geographical [Domain]	Sales Revenue Net	20531000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Segment Geographical [Domain]	Sales Revenue Net	20614000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	Segment Geographical [Domain]	Sales Revenue Net	20453000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Segment Geographical [Domain]	Sales Revenue Net	89950000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	Segment Geographical [Domain]	Sales Revenue Net	24090000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	Segment Geographical [Domain]	Sales Revenue Net	22090000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Segment Geographical [Domain]	Sales Revenue Net	23317000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	UNITED STATES	Sales Revenue Net	42941000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	UNITED STATES	Sales Revenue Net	40578000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	UNITED STATES	Sales Revenue Net	45248000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Non Us [Member]	Sales Revenue Net	50639000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Non Us [Member]	Sales Revenue Net	44742000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Non Us [Member]	Sales Revenue Net	44702000000	iso4217:USD	-6

Fact Table
Network	101230 - Disclosure - Revenue Classified by Significant Product and Service Offerings (Detail) (http://www.xbrlsite.com/msft/role/DisclosureRevenueClassifiedBySignificantProductAndServiceOfferingsDetail)
Table	Segment Reporting [Abstract]

#	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]	Sales Revenue Net	93580000000	iso4217:USD	-6
2	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Products And Services [Domain]	Sales Revenue Net	20379000000	iso4217:USD	-6
3	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Products And Services [Domain]	Sales Revenue Net	85320000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	Products And Services [Domain]	Sales Revenue Net	23796000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	Products And Services [Domain]	Sales Revenue Net	20531000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Products And Services [Domain]	Sales Revenue Net	20614000000	iso4217:USD	-6
7	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	Products And Services [Domain]	Sales Revenue Net	20453000000	iso4217:USD	-6
8	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Products And Services [Domain]	Sales Revenue Net	89950000000	iso4217:USD	-6
9	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	Products And Services [Domain]	Sales Revenue Net	24090000000	iso4217:USD	-6
10	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	Products And Services [Domain]	Sales Revenue Net	22090000000	iso4217:USD	-6
11	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Products And Services [Domain]	Sales Revenue Net	23317000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Advertising [Member]	Sales Revenue Net	4557000000	iso4217:USD	-6
13	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Advertising [Member]	Sales Revenue Net	6098000000	iso4217:USD	-6
14	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Advertising [Member]	Sales Revenue Net	6971000000	iso4217:USD	-6
15	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Consulting And Product Support Services [Member]	Sales Revenue Net	5090000000	iso4217:USD	-6
16	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Consulting And Product Support Services [Member]	Sales Revenue Net	5641000000	iso4217:USD	-6
17	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Consulting And Product Support Services [Member]	Sales Revenue Net	5588000000	iso4217:USD	-6
18	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Devices [Member]	Sales Revenue Net	11602000000	iso4217:USD	-6
19	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Devices [Member]	Sales Revenue Net	7466000000	iso4217:USD	-6
20	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Devices [Member]	Sales Revenue Net	4557000000	iso4217:USD	-6
21	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Linked In Corporation [Member]	Sales Revenue Net	0	iso4217:USD	-6
22	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Linked In Corporation [Member]	Sales Revenue Net	0	iso4217:USD	-6
23	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Linked In Corporation [Member]	Sales Revenue Net	2268000000	iso4217:USD	-6
24	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Microsoft Office System [Member]	Sales Revenue Net	23538000000	iso4217:USD	-6
25	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Microsoft Office System [Member]	Sales Revenue Net	23588000000	iso4217:USD	-6
26	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Microsoft Office System [Member]	Sales Revenue Net	25389000000	iso4217:USD	-6
27	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Other Products And Services [Member]	Sales Revenue Net	6234000000	iso4217:USD	-6
28	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Other Products And Services [Member]	Sales Revenue Net	5851000000	iso4217:USD	-6
29	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Other Products And Services [Member]	Sales Revenue Net	5538000000	iso4217:USD	-6
30	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Server Products And Tools [Member]	Sales Revenue Net	18612000000	iso4217:USD	-6
31	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Server Products And Tools [Member]	Sales Revenue Net	19177000000	iso4217:USD	-6
32	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Server Products And Tools [Member]	Sales Revenue Net	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]	Sales Revenue Net	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]	Sales Revenue Net	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]	Sales Revenue Net	8625000000	iso4217:USD	-6
36	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Xbox [Member]	Sales Revenue Net	9121000000	iso4217:USD	-6
37	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Xbox [Member]	Sales Revenue Net	9395000000	iso4217:USD	-6
38	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Xbox [Member]	Sales Revenue Net	9256000000	iso4217:USD	-6

Fact Table
Network	101240 - Disclosure - Revenue Classified by Significant Product and Service Offerings (Parenthetical) (Detail) (http://www.xbrlsite.com/msft/role/DisclosureRevenueClassifiedBySignificantProductAndServiceOfferingsParentheticalDetail)
Table	Segment Reporting [Abstract]

#	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]	Sales Revenue Net	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]	Sales Revenue Net	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]	Sales Revenue Net	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]	Sales Revenue Net	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]	Sales Revenue Net	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]	Sales Revenue Net	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]	Sales Revenue Net	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]	Sales Revenue Net	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]	Sales Revenue Net	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]	Sales Revenue Net	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]	Sales Revenue Net	23317000000	iso4217:USD	-6
12	0000789019 (http://www.sec.gov/CIK)	2014-07-01 to 2015-06-30	Commercial Cloud [Member]	Sales Revenue Net	5800000000	iso4217:USD	-8
13	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Commercial Cloud [Member]	Sales Revenue Net	9500000000	iso4217:USD	-8
14	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Commercial Cloud [Member]	Sales Revenue Net	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.xbrlsite.com/msft/role/DisclosureLongLivedAssetsExcludingFinancialInstrumentsAndTaxAssetsClassifiedByLocationOfControllingStatutoryCompanyDetail)
Table	Segment Reporting [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureQuarterlyInformationUnauditedDetail)
Table	Quarterly Financial Information Disclosure [Abstract]

#	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.xbrlsite.com/msft/role/DisclosureQuarterlyInformationUnauditedParentheticalDetail)
Table	Quarterly Financial Information Disclosure [Abstract]

#	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]	Asset Impairment Charges	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	Sales And Marketing Restructuring Plan [Member]	Restructuring Charges	306000000	iso4217:USD	-6
4	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Twenty Sixteen Restructuring Plan [Member]	Restructuring Charges	501000000	iso4217:USD	-6
5	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Twenty Sixteen Restructuring Plan [Member]	Restructuring Charges	480000000	iso4217:USD	-6
6	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2015-09-30	Windows Ten Deferral [Member]	Sales Revenue Net	1300000000	iso4217:USD	-8
7	0000789019 (http://www.sec.gov/CIK)	2015-07-01 to 2016-06-30	Windows Ten Deferral [Member]	Sales Revenue Net	6600000000	iso4217:USD	-8
8	0000789019 (http://www.sec.gov/CIK)	2015-10-01 to 2015-12-31	Windows Ten Deferral [Member]	Sales Revenue Net	1700000000	iso4217:USD	-8
9	0000789019 (http://www.sec.gov/CIK)	2016-01-01 to 2016-03-31	Windows Ten Deferral [Member]	Sales Revenue Net	1600000000	iso4217:USD	-8
10	0000789019 (http://www.sec.gov/CIK)	2016-04-01 to 2016-06-30	Windows Ten Deferral [Member]	Sales Revenue Net	2000000000	iso4217:USD	-8
11	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2016-09-30	Windows Ten Deferral [Member]	Sales Revenue Net	1900000000	iso4217:USD	-8
12	0000789019 (http://www.sec.gov/CIK)	2016-07-01 to 2017-06-30	Windows Ten Deferral [Member]	Sales Revenue Net	6700000000	iso4217:USD	-8
13	0000789019 (http://www.sec.gov/CIK)	2016-10-01 to 2016-12-31	Windows Ten Deferral [Member]	Sales Revenue Net	2000000000	iso4217:USD	-8
14	0000789019 (http://www.sec.gov/CIK)	2017-01-01 to 2017-03-31	Windows Ten Deferral [Member]	Sales Revenue Net	1500000000	iso4217:USD	-8
15	0000789019 (http://www.sec.gov/CIK)	2017-04-01 to 2017-06-30	Windows Ten Deferral [Member]	Sales Revenue Net	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	635	610	25

Rule Details

Errors and Warnings

Other than rule related. The error Type is a vague and fragile conjecture on the culprit, because at this point most 'bad reports' simply 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

The Report

User Alterations

Table of Contents

Terms

Model Structures

Definition Graphs

Fact Tables

Rules

Rule Details

Errors and Warnings