Maxar Technologies Ltd. (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

Line	Label	Object Class	Period Type	Balance	Report ElementName
1	00090 - Document - Document and Entity Information	Network	*	*	http://www.maxar.com/role/DocumentDocumentAndEntityInformation
2	Implied Table	Table	*	*	implied:Table
3	Document and Entity Information [Abstract]	Abstract			maxr:DocumentAndEntityInformationAbstract
4	Entity Registrant Name	Concept (Text/String)	For Period		dei:EntityRegistrantName
5	Entity Central Index Key	Concept (CIK Number)	For Period		dei:EntityCentralIndexKey
6	Document Type	Concept (Submission Type)	For Period		dei:DocumentType
7	Document Period End Date	Concept (Date)	For Period		dei:DocumentPeriodEndDate
8	Amendment Flag	Concept (Yes/No)	For Period		dei:AmendmentFlag
9	Current Fiscal Year End Date	Concept (Month/Day)	For Period		dei:CurrentFiscalYearEndDate
10	Entity Current Reporting Status	Concept (Yes/No)	For Period		dei:EntityCurrentReportingStatus
11	Entity Common Stock, Shares Outstanding	Concept (Shares)	As Of		dei:EntityCommonStockSharesOutstanding
12	Document Fiscal Year Focus	Concept (Year)	For Period		dei:DocumentFiscalYearFocus
13	Document Fiscal Period Focus	Concept (Fiscal Period)	For Period		dei:DocumentFiscalPeriodFocus
14	00100 - Statement - Consolidated Statements of Earnings	Network	*	*	http://www.maxar.com/role/StatementConsolidatedStatementsOfEarnings
15	Implied Table	Table	*	*	implied:Table
16	Consolidated Statements of Earnings	Abstract			ifrs-full:IncomeStatementAbstract
17	Revenues	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
18	Direct costs, selling, general and administration	Concept (Monetary)	For Period	Debit	maxr:DirectCostsSellingGeneralAndAdministration
19	Depreciation and amortization	Concept (Monetary)	For Period	Debit	ifrs-full:DepreciationAndAmortisationExpense
20	Foreign exchange loss (gain)	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
21	Share-based compensation expense	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees
22	Other expense	Concept (Monetary)	For Period	Debit	ifrs-full:OtherExpenseByNature
23	Earnings before interest and income taxes	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromOperatingActivities
24	Finance income	Concept (Monetary)	For Period	Credit	ifrs-full:FinanceIncome
25	Finance expense	Concept (Monetary)	For Period	Debit	ifrs-full:FinanceCosts
26	Earnings (loss) before income taxes	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossBeforeTax
27	Equity in loss from joint ventures, net of tax	Concept (Monetary)	For Period	Debit	maxr:EquityInLossFromJointVenturesNetOfTax
28	Income tax expense (recovery)	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
29	Net earnings	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
30	Net earnings per common share:	Abstract			ifrs-full:EarningsPerShareAbstract
31	Basic (in dollar per share)	Concept (Share)	For Period		ifrs-full:BasicEarningsLossPerShare
32	Diluted (in dollar per share)	Concept (Share)	For Period		ifrs-full:DilutedEarningsLossPerShare
33	00200 - Statement - Consolidated Statements of Comprehensive Income	Network	*	*	http://www.maxar.com/role/StatementConsolidatedStatementsOfComprehensiveIncome
34	Implied Table	Table	*	*	implied:Table
35	Consolidated Statements of Comprehensive Income	Abstract			ifrs-full:StatementOfComprehensiveIncomeAbstract
36	Net earnings	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
37	Other comprehensive income (loss):	Abstract			ifrs-full:OtherComprehensiveIncomeAbstract
38	Items that may be subsequently reclassified to earnings:	Abstract			ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract
39	Foreign currency translation adjustment	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation
40	Net gain (loss) on hedge of net investment in foreign operations (net of income tax expense of $0.2 million and $0.4 million, respectively)	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnHedgesOfNetInvestmentsInForeignOperationsNetOfTax
41	Effective portion of changes in fair value of derivatives designated as cash flow hedges (net of income tax expense of $1.1 million and income tax recovery of $0.4 million, respectively)	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnCashFlowHedgesNetOfTax
42	Net change in fair value of derivatives designated as cash flow hedges transferred to earnings (net of income tax recovery of $1.2 and $0.1 million, respectively)	Concept (Monetary)	For Period	Debit	ifrs-full:ReclassificationAdjustmentsOnCashFlowHedgesNetOfTax
43	Net change in fair value of available-for-sale financial assets (net of income tax recovery of $0.1 million and income taxes of $nil, respectively)	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxAvailableforsaleFinancialAssets
44	Total other comprehensive income (loss) that may be reclassified to profit or loss, net of tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax
45	Items that will not be subsequently reclassified to earnings:	Abstract			ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract
46	Actuarial losses on defined benefit pension plans and other post-retirement benefit plans (net of income tax expense of $9.4 million and income tax recovery of $0.6 million, respectively)	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
47	Total other comprehensive income (loss) that will not be reclassified to profit or loss, net of tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax
48	Other comprehensive loss, net of income taxes	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncome
49	Comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
50	00205 - Statement - Consolidated Statements of Comprehensive Income - Parenthetical	Network	*	*	http://www.maxar.com/role/StatementConsolidatedStatementsOfComprehensiveIncomeParenthetical
51	Implied Table	Table	*	*	implied:Table
52	Consolidated Statements of Comprehensive Income	Abstract			ifrs-full:StatementOfComprehensiveIncomeAbstract
53	Net gain (loss) on hedge of net investment in foreign operations, income tax expense (recovery)	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxRelatingToHedgesOfNetInvestmentsInForeignOperationsOfOtherComprehensiveIncome
54	Effective portion of changes in fair value of derivatives designated as cash flow hedges, income tax expense (recovery)	Concept (Monetary)	For Period	Debit	maxr:IncomeTaxRelatingToGainLossesOnCashFlowHedgesOfOtherComprehensiveIncome
55	Net change in fair value of derivatives designated as cash flow hedges transferred to earnings, income tax expense (recovery)	Concept (Monetary)	For Period	Debit	maxr:IncomeTaxRelatingToReclassificationAdjustmentsOnCashFlowHedgesOfOtherComprehensiveIncome
56	Net change in fair value of available-for-sale financial assets, income tax expense (recovery)	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxRelatingToAvailableforsaleFinancialAssetsOfOtherComprehensiveIncome
57	Actuarial losses on defined benefit pension plans and other post-retirement benefit plans, income tax expense (recovery)	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome
58	00300 - Statement - Consolidated Balance Sheets	Network	*	*	http://www.maxar.com/role/StatementConsolidatedBalanceSheets
59	Implied Table	Table	*	*	implied:Table
60	Consolidated Balance Sheets	Abstract			ifrs-full:StatementOfFinancialPositionAbstract
61	Assets	Abstract			ifrs-full:AssetsAbstract
62	Current assets:	Abstract			ifrs-full:CurrentAssetsAbstract
63	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
64	Trade and other receivables	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherCurrentReceivables
65	Financial assets, other	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentFinancialAssets
66	Construction contract assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentContractAssets
67	Inventories	Concept (Monetary)	As Of	Debit	ifrs-full:Inventories
68	Non-financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentNonfinancialAssets
69	Current tax assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTaxAssetsCurrent
70	Total current assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssets
71	Non-current assets:	Abstract			ifrs-full:NoncurrentAssetsAbstract
72	Orbital receivables	Concept (Monetary)	As Of	Debit	maxr:OrbitalReceivablesNoncurrent
73	Financial assets, other	Concept (Monetary)	As Of	Debit	ifrs-full:OtherNoncurrentFinancialAssets
74	Inventories	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentInventories
75	Non-financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherNoncurrentNonfinancialAssets
76	Deferred tax assets	Concept (Monetary)	As Of	Debit	ifrs-full:NetDeferredTaxAssets
77	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
78	Intangible assets	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsOtherThanGoodwill
79	Goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
80	Total non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssets
81	Assets	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
82	Liabilities and Shareholders' Equity	Abstract			ifrs-full:EquityAndLiabilitiesAbstract
83	Current liabilities:	Abstract			ifrs-full:CurrentLiabilitiesAbstract
84	Bank overdraft	Concept (Monetary)	As Of	Credit	ifrs-full:BankOverdraftsClassifiedAsCashEquivalents
85	Trade and other payables	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayables
86	Current tax liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentTaxLiabilitiesCurrent
87	Financial liabilities, other	Concept (Monetary)	As Of	Credit	ifrs-full:OtherCurrentFinancialLiabilities
88	Provisions	Concept (Monetary)	As Of	Credit	ifrs-full:OtherShorttermProvisions
89	Employee benefits	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentProvisionsForEmployeeBenefits
90	Non-financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:OtherCurrentNonfinancialLiabilities
91	Construction contract liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentContractLiabilities
92	Securitization liability	Concept (Monetary)	As Of	Credit	maxr:CurrentSecuritizationLiability
93	Current portion of long-term debt	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentPortionOfLongtermBorrowings
94	Current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentLiabilities
95	Non-current liabilities:	Abstract			ifrs-full:NoncurrentLiabilitiesAbstract
96	Financial liabilities, other	Concept (Monetary)	As Of	Credit	ifrs-full:OtherNoncurrentFinancialLiabilities
97	Provisions	Concept (Monetary)	As Of	Credit	ifrs-full:OtherLongtermProvisions
98	Employee benefits	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentProvisionsForEmployeeBenefits
99	Non-financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:OtherNoncurrentNonfinancialLiabilities
100	Deferred tax liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NetDeferredTaxLiabilities
101	Securitization liability	Concept (Monetary)	As Of	Credit	maxr:NonCurrentSecuritizationLiability
102	Long-term debt	Concept (Monetary)	As Of	Credit	ifrs-full:LongtermBorrowings
103	Total liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:Liabilities
104	Shareholders' equity:	Abstract			ifrs-full:EquityAbstract
105	Share capital	Concept (Monetary)	As Of	Credit	ifrs-full:IssuedCapital
106	Contributed surplus	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfSharebasedPayments
107	Retained earnings	Concept (Monetary)	As Of	Credit	ifrs-full:RetainedEarnings
108	Accumulated other comprehensive income	Concept (Monetary)	As Of	Credit	ifrs-full:AccumulatedOtherComprehensiveIncome
109	Shareholders' equity	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
110	Liabilities and Shareholders' Equity	Concept (Monetary)	As Of	Credit	ifrs-full:EquityAndLiabilities
111	00400 - Statement - Consolidated Statements of Change in Shareholders' Equity	Network	*	*	http://www.maxar.com/role/StatementConsolidatedStatementsOfChangeInShareholdersEquity
112	Statement of changes in equity [table]	Table	*	*	ifrs-full:StatementOfChangesInEquityTable
113	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
114	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
115	Employee Share Purchase Plan	Member			maxr:EmployeeSharePurchasePlanMember
116	Equity-settled SARs	Member			maxr:EquitySettledShareAppreciationRightsMember
117	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
118	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
119	DigitalGlobe	Member			maxr:DigitalGlobeIncMember
120	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
121	Equity [member]	Member			ifrs-full:EquityMember
122	Share Capital	Member			ifrs-full:IssuedCapitalMember
123	Contributed Surplus	Member			ifrs-full:ReserveOfSharebasedPaymentsMember
124	Retained Earnings	Member			ifrs-full:RetainedEarningsMember
125	Total accumulated other comprehensive income	Member			ifrs-full:AccumulatedOtherComprehensiveIncomeMember
126	Net gain (loss) on hedge of net investment in foreign operations	Member			maxr:NetGainLossOnHedgeOfNetInvestmentInForeignOperationsMember
127	Foreign currency translation adjustment	Member			ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember
128	Fair value gains (losses) on cash flow hedges	Member			ifrs-full:ReserveOfCashFlowHedgesMember
129	Fair value gains on available-for-sale financial assets	Member			ifrs-full:ReserveOfGainsAndLossesOnRemeasuringAvailableforsaleFinancialAssetsMember
130	Actuarial gains (losses) on defined benefit pension plans and other post retirement benefit plans	Member			ifrs-full:ReserveOfRemeasurementsOfDefinedBenefitPlansMember
131	Consolidated Statements of Change in Shareholders' Equity	LineItems			ifrs-full:StatementOfChangesInEquityLineItems
132	Balance at beginning of period	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
133	Common shares issued	Concept (Monetary)	For Period	Credit	ifrs-full:IssueOfEquity
134	Equity-settled share-based compensation expense (note 22(f))	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions
135	Issuance of replacement equity-settled awards pursuant to acquisition (note 9)	Concept (Monetary)	For Period	Debit	maxr:IssuanceOfReplacementEquitySettledAwardsPursuantToBusinessCombination
136	Dividends	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsPaid
137	Comprehensive income (loss)	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
138	Balance at end of period	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
139	00500 - Statement - Consolidated Statements of Cash Flows	Network	*	*	http://www.maxar.com/role/StatementConsolidatedStatementsOfCashFlows
140	Statement [Table]	Table	*	*	us-gaap:StatementTable
141	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
142	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
143	2017 Term notes	Member			maxr:TwoThousandSeventeenTermNotesMember
144	2024 Term notes	Member			maxr:TwoThousandTwentyFourTermNotesMember
145	Statement	LineItems			us-gaap:StatementLineItems
146	Operating activities:	Abstract			ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
147	Net earnings	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
148	Adjustments to reconcile to net cash from operating activities:	Abstract			ifrs-full:AdjustmentsForReconcileProfitLossAbstract
149	Depreciation of property, plant and equipment	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDepreciationExpense
150	Amortization of intangible assets	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForAmortisationExpense
151	Share-based compensation expense	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForSharebasedPayments
152	Finance income	Concept (Monetary)	For Period	Credit	ifrs-full:AdjustmentsForFinanceIncome
153	Finance expense	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForFinanceCosts
154	Unrealized foreign exchange loss (gain)	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForUnrealisedForeignExchangeLossesGains
155	Loss from early extinguishment of debt	Concept (Monetary)	For Period	Credit	maxr:IfrsGainsLossesOnExtinguishmentOfDebt
156	Income tax expense (recovery)	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncomeTaxExpense
157	Income taxes paid	Concept (Monetary)	For Period	Credit	ifrs-full:IncomeTaxesPaidClassifiedAsOperatingActivities
158	Income taxes recovered	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxesRefundClassifiedAsOperatingActivities
159	Changes in operating assets and liabilities	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseInWorkingCapital
160	Cash provided by operating activities	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperatingActivities
161	Investing activities:	Abstract			ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
162	Purchase of property, plant and equipment	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
163	Purchase/development of intangible assets	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities
164	Acquisition of DigitalGlobe, net of cash acquired	Concept (Monetary)	For Period	Credit	ifrs-full:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
165	Disposal of short-term investments	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromSalesOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod
166	Decrease in restricted cash	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInDecreaseIncreaseInRestrictedCashAndCashEquivalents
167	Interest received on short-term investments and others	Concept (Monetary)	For Period	Debit	ifrs-full:InterestReceivedClassifiedAsInvestingActivities
168	Cash used in investing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInInvestingActivities
169	Financing activities:	Abstract			ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
170	Issuance of long-term debt related to acquisition, net of financing fees	Concept (Monetary)	For Period	Debit	maxr:ProceedsFromIssuanceOfLongTermDebtRelatedToAcquisitionNetOfFinancingFees
171	Repayment of revolving loan facility and other long-term debt	Concept (Monetary)	For Period	Credit	maxr:RepaymentOfRevolvingLoanFacilityAndOtherLongTermDebt
172	Repayment of Term Notes	Concept (Monetary)	For Period	Credit	ifrs-full:RepaymentsOfNoncurrentBorrowings
173	Interest paid on long-term debt	Concept (Monetary)	For Period	Credit	ifrs-full:InterestPaidClassifiedAsFinancingActivities
174	Proceeds from revolving securitization facility	Concept (Monetary)	For Period	Debit	maxr:ProceedsFromRevolvingSecuritizationFacility
175	Settlement of securitization liability, including interest	Concept (Monetary)	For Period	Credit	maxr:SettlementOfSecuritizationLiabilityIncludingInterest
176	Repayment of interest free government assistance	Concept (Monetary)	For Period	Credit	maxr:RepaymentOfGovernmentGrantsClassifiedAsFinancingActivities
177	Proceeds from issuance of common shares issued under employee share purchase plan	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromIssuingShares
178	Share issuance costs	Concept (Monetary)	For Period	Credit	ifrs-full:PaymentsForShareIssueCosts
179	Payment of dividends	Concept (Monetary)	For Period	Credit	ifrs-full:DividendsPaidClassifiedAsFinancingActivities
180	Cash provided by (used in) financing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInFinancingActivities
181	Increase (decrease) in cash and cash equivalents	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges
182	Effect of foreign exchange on cash and cash equivalents	Concept (Monetary)	For Period	Debit	ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
183	Cash and cash equivalents, beginning of year	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition
184	Cash and cash equivalents, end of year	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition
185	10101 - Disclosure - General business description	Network	*	*	http://www.maxar.com/role/DisclosureGeneralBusinessDescription
186	Implied Table	Table	*	*	implied:Table
187	General business description	Abstract			maxr:DisclosureOfGeneralBusinessDescriptionAbstract
188	General business description	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory
189	10201 - Disclosure - Basis of preparation	Network	*	*	http://www.maxar.com/role/DisclosureBasisOfPreparation
190	Implied Table	Table	*	*	implied:Table
191	Basis of preparation	Abstract			maxr:DisclosureOfBasisOfPreparationAbstract
192	Basis of preparation	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory
193	10301 - Disclosure - Significant accounting policies	Network	*	*	http://www.maxar.com/role/DisclosureSignificantAccountingPolicies
194	Implied Table	Table	*	*	implied:Table
195	Significant accounting policies	Abstract			maxr:DisclosureOfSignificantAccountingPoliciesAbstract
196	Significant accounting policies	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
197	10401 - Disclosure - New standards and interpretations not yet adopted	Network	*	*	http://www.maxar.com/role/DisclosureNewStandardsAndInterpretationsNotYetAdopted
198	Implied Table	Table	*	*	implied:Table
199	New standards and interpretations not yet adopted	Abstract			ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsAbstract
200	New standards and interpretations not yet adopted	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretations
201	10501 - Disclosure - Revenue and segmented information	Network	*	*	http://www.maxar.com/role/DisclosureRevenueAndSegmentedInformation
202	Implied Table	Table	*	*	implied:Table
203	Revenue and segmented information	Abstract			maxr:DisclosureOfRevenueAndEntitySReportableSegmentsAbstract
204	Revenue and segmented information	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfRevenueAndEntityReportableSegmentsTextBlock
205	10601 - Disclosure - Expenses by nature	Network	*	*	http://www.maxar.com/role/DisclosureExpensesByNature
206	Implied Table	Table	*	*	implied:Table
207	Expenses by nature	Abstract			ifrs-full:ExpenseByNatureAbstract
208	Expenses by nature	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfExpensesByNatureExplanatory
209	10701 - Disclosure - Finance expense	Network	*	*	http://www.maxar.com/role/DisclosureFinanceExpense
210	Implied Table	Table	*	*	implied:Table
211	Finance expense	Abstract			maxr:DisclosureOfFinanceExpenseAbstract
212	Finance expense	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinanceCostExplanatory
213	10801 - Disclosure - Other expense	Network	*	*	http://www.maxar.com/role/DisclosureOtherExpense
214	Implied Table	Table	*	*	implied:Table
215	Other expense	Abstract			maxr:OtherExpenseAbstract
216	Other expense	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfOtherExpenseExplanatory
217	10901 - Disclosure - Business combination	Network	*	*	http://www.maxar.com/role/DisclosureBusinessCombination
218	Implied Table	Table	*	*	implied:Table
219	Business combination	Abstract			ifrs-full:DisclosureOfBusinessCombinationsAbstract
220	Business combination	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfBusinessCombinationsExplanatory
221	11001 - Disclosure - Trade and other receivables	Network	*	*	http://www.maxar.com/role/DisclosureTradeAndOtherReceivables
222	Implied Table	Table	*	*	implied:Table
223	Trade and other receivables	Abstract			ifrs-full:TradeAndOtherReceivablesAbstract
224	Trade and other receivables	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTradeAndOtherReceivablesExplanatory
225	11101 - Disclosure - Financial assets and liabilities, other	Network	*	*	http://www.maxar.com/role/DisclosureFinancialAssetsAndLiabilitiesOther
226	Implied Table	Table	*	*	implied:Table
227	Financial assets and liabilities, other	Abstract			maxr:DisclosureOfFinancialAssetsAndLiabilitiesOtherAbstract
228	Financial assets and liabilities, other	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfFinancialAssetsAndLiabilitiesOtherTableTextBlock
229	11201 - Disclosure - Maturities of certain current assets and liabilities	Network	*	*	http://www.maxar.com/role/DisclosureMaturitiesOfCertainCurrentAssetsAndLiabilities
230	Implied Table	Table	*	*	implied:Table
231	Maturities of certain current assets and liabilities	Abstract			maxr:DisclosureOfMaturitiesOfCertainCurrentAssetsAndLiabilitiesAbstract
232	Maturities of certain current assets and liabilities	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfAmountsToBeRecoveredOrSettledAfterTwelveMonthsForClassesOfAssetsAndLiabilitiesThatContainAmountsToBeRecoveredOrSettledBothNoMoreAndMoreThanTwelveMonthsAfterReportingDateExplanatory
233	11301 - Disclosure - Non-financial assets and liabilities	Network	*	*	http://www.maxar.com/role/DisclosureNonFinancialAssetsAndLiabilities
234	Implied Table	Table	*	*	implied:Table
235	Non-financial assets and liabilities	Abstract			maxr:DisclosureOfNonFinancialAssetsAndLiabilitiesAbstract
236	Non-financial assets and liabilities	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfNonFinancialAssetsAndLiabilitiesTextBlock
237	11401 - Disclosure - Orbital receivables	Network	*	*	http://www.maxar.com/role/DisclosureOrbitalReceivables
238	Implied Table	Table	*	*	implied:Table
239	Orbital receivables	Abstract			maxr:DisclosureOfOrbitalReceivableAbstract
240	Orbital receivables	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfOrbitalReceivablesTextBlock
241	11501 - Disclosure - Property, plant and equipment	Network	*	*	http://www.maxar.com/role/DisclosurePropertyPlantAndEquipment
242	Implied Table	Table	*	*	implied:Table
243	Property, plant and equipment	Abstract			ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract
244	Property, plant and equipment	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory
245	11601 - Disclosure - Intangible assets and goodwill	Network	*	*	http://www.maxar.com/role/DisclosureIntangibleAssetsAndGoodwill
246	Implied Table	Table	*	*	implied:Table
247	Intangible assets and goodwill	Abstract			ifrs-full:DisclosureOfIntangibleAssetsAbstract
248	Intangible assets and goodwill	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfIntangibleAssetsExplanatory
249	11701 - Disclosure - Provisions	Network	*	*	http://www.maxar.com/role/DisclosureProvisions
250	Implied Table	Table	*	*	implied:Table
251	Provisions	Abstract			ifrs-full:DisclosureOfOtherProvisionsAbstract
252	Provisions	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfProvisionsExplanatory
253	11801 - Disclosure - Employee benefits	Network	*	*	http://www.maxar.com/role/DisclosureEmployeeBenefits
254	Implied Table	Table	*	*	implied:Table
255	Employee benefits	Abstract			maxr:DisclosureOfEmployeeBenefitsAbstract
256	Employee benefits	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEmployeeBenefitsExplanatory
257	11901 - Disclosure - Long-term debt	Network	*	*	http://www.maxar.com/role/DisclosureLongTermDebt
258	Implied Table	Table	*	*	implied:Table
259	Long-term debt	Abstract			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsAbstract
260	Long-term debt	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfBorrowingsExplanatory
261	12001 - Disclosure - Shareholders' equity	Network	*	*	http://www.maxar.com/role/DisclosureShareholdersEquity
262	Implied Table	Table	*	*	implied:Table
263	Shareholders equity	Abstract			ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
264	Shareholders equity	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory
265	12101 - Disclosure - Earnings per common share	Network	*	*	http://www.maxar.com/role/DisclosureEarningsPerCommonShare
266	Implied Table	Table	*	*	implied:Table
267	Earnings per common share	Abstract			ifrs-full:EarningsPerShareAbstract
268	Earnings per common share	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEarningsPerShareExplanatory
269	12201 - Disclosure - Share-based payment plans	Network	*	*	http://www.maxar.com/role/DisclosureShareBasedPaymentPlans
270	Implied Table	Table	*	*	implied:Table
271	Share-based payment plans	Abstract			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementAbstract
272	Share-based payment plans	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSharebasedPaymentArrangementsExplanatory
273	12301 - Disclosure - Financial instruments and fair value disclosures	Network	*	*	http://www.maxar.com/role/DisclosureFinancialInstrumentsAndFairValueDisclosures
274	Implied Table	Table	*	*	implied:Table
275	Financial instruments and fair value disclosures	Abstract			ifrs-full:DisclosureOfFinancialInstrumentsAbstract
276	Financial instruments and fair value disclosures	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialInstrumentsExplanatory
277	12401 - Disclosure - Capital management	Network	*	*	http://www.maxar.com/role/DisclosureCapitalManagement
278	Implied Table	Table	*	*	implied:Table
279	Capital management	Abstract			ifrs-full:DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalAbstract
280	Capital management	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalExplanatory
281	12501 - Disclosure - Government assistance	Network	*	*	http://www.maxar.com/role/DisclosureGovernmentAssistance
282	Implied Table	Table	*	*	implied:Table
283	Government assistance	Abstract			maxr:GovernmentAssistanceAbstract
284	Government assistance	Concept (Text Block (HTML))	For Period		maxr:GovernmentAssistanceTextBlock
285	12601 - Disclosure - Income taxes	Network	*	*	http://www.maxar.com/role/DisclosureIncomeTaxes
286	Implied Table	Table	*	*	implied:Table
287	Income taxes	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
288	Income taxes	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfIncomeTaxExplanatory
289	12701 - Disclosure - Contingencies and commitments	Network	*	*	http://www.maxar.com/role/DisclosureContingenciesAndCommitments
290	Implied Table	Table	*	*	implied:Table
291	Contingencies and commitments	Abstract			ifrs-full:DisclosureOfContingentLiabilitiesAbstract
292	Contingencies and commitments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory
293	12801 - Disclosure - Related party transactions	Network	*	*	http://www.maxar.com/role/DisclosureRelatedPartyTransactions
294	Implied Table	Table	*	*	implied:Table
295	Related party transactions	Abstract			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesAbstract
296	Related party transactions	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfRelatedPartyExplanatory
297	12901 - Disclosure - Supplemental cash flow information	Network	*	*	http://www.maxar.com/role/DisclosureSupplementalCashFlowInformation
298	Implied Table	Table	*	*	implied:Table
299	Supplemental cash flow information	Abstract			maxr:IfrsSupplementalCashFlowInformationAbstract
300	Supplemental cash flow information	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfCashFlowStatementExplanatory
301	13001 - Disclosure - Subsequent event	Network	*	*	http://www.maxar.com/role/DisclosureSubsequentEvent
302	Implied Table	Table	*	*	implied:Table
303	Subsequent event	Abstract			ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodAbstract
304	Subsequent event	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEventsAfterReportingPeriodExplanatory
305	20302 - Disclosure - Significant accounting policies (Policies)	Network	*	*	http://www.maxar.com/role/DisclosureSignificantAccountingPoliciesPolicies
306	Implied Table	Table	*	*	implied:Table
307	Significant accounting policies	Abstract			maxr:DisclosureOfSignificantAccountingPoliciesAbstract
308	Basis of consolidation	Concept (Text Block (HTML))	For Period		maxr:DescriptionOfAccountingPolicyForBasisOfConsolidationTextBlock
309	Business combinations	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForBusinessCombinationsExplanatory
310	Foreign currency	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory
311	Revenue recognition	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForRecognitionOfRevenue
312	Earnings per common share	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForEarningsPerShareExplanatory
313	Research and development	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForResearchAndDevelopmentExpenseExplanatory
314	Government assistance and investment tax credits	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForGovernmentGrants
315	Finance income and finance expense	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForFinanceIncomeAndCostsExplanatory
316	Financial instruments	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory
317	Cash and cash equivalents	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents
318	Investments	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethodExplanatory
319	Inventories	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForMeasuringInventories
320	Property, plant and equipment	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
321	Leased assets	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory
322	Intangible assets and goodwill	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory
323	Impairment	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfAssetsExplanatory
324	Provisions	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory
325	Employee benefits	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory
326	Share-based compensation plans	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory
327	Income taxes	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
328	Adoption of new standards	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfInitialApplicationOfStandardsOrInterpretations
329	30303 - Disclosure - Significant accounting policies (Tables)	Network	*	*	http://www.maxar.com/role/DisclosureSignificantAccountingPoliciesTables
330	Implied Table	Table	*	*	implied:Table
331	Significant accounting policies	Abstract			maxr:DisclosureOfSignificantAccountingPoliciesAbstract
332	Summary of useful lives of property, plant and equipment	Concept (Text Block (HTML))	For Period		maxr:ScheduleOfEstimatedUsefulLivesOfPropertyPlantAndEquipmentTableTextBlock
333	Summary of useful lives of intangible assets	Concept (Text Block (HTML))	For Period		maxr:ScheduleOfEstimatedUsefulLivesOfIntangibleAssetsTableTextBlock
334	30503 - Disclosure - Revenue and segmented information (Tables)	Network	*	*	http://www.maxar.com/role/DisclosureRevenueAndSegmentedInformationTables
335	Implied Table	Table	*	*	implied:Table
336	Revenue and segmented information	Abstract			maxr:DisclosureOfRevenueAndEntitySReportableSegmentsAbstract
337	Schedule of operating performance of reporting segments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOperatingSegmentsExplanatory
338	Schedule of reconciliation to earnings (loss) before income taxes	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfReconciliationOfEarningsBeforeIncomeTaxesTableTextBlock
339	Schedule of primary sources of revenue	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfRevenueExplanatory
340	Schedule of revenue based on geographic location of customer	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfGeographicalAreasExplanatory
341	Schedule of revenue from significant customers	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSegmentsMajorCustomersExplanatory
342	Schedule of non-current non-financial assets, property, plant and equipment, intangible assets and goodwill located geographically	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfNoncurrentNonfinancialAssetsPropertyPlantAndEquipmentIntangibleAssetsAndGoodwillGeographicalAreasTableTextBlock
343	30603 - Disclosure - Expenses by nature (Tables)	Network	*	*	http://www.maxar.com/role/DisclosureExpensesByNatureTables
344	Implied Table	Table	*	*	implied:Table
345	Expenses by nature	Abstract			ifrs-full:ExpenseByNatureAbstract
346	Schedule of operating expenses by nature	Concept (Text Block (HTML))	For Period		maxr:ScheduleOfOperatingExpensesByNatureTableTextBlock
347	30703 - Disclosure - Finance expense (Tables)	Network	*	*	http://www.maxar.com/role/DisclosureFinanceExpenseTables
348	Implied Table	Table	*	*	implied:Table
349	Finance expense	Abstract			maxr:DisclosureOfFinanceExpenseAbstract
350	Schedule of finance expense	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfFinanceCostTableTextBlock
351	30803 - Disclosure - Other expense (Tables)	Network	*	*	http://www.maxar.com/role/DisclosureOtherExpenseTables
352	Implied Table	Table	*	*	implied:Table
353	Other expense	Abstract			maxr:OtherExpenseAbstract
354	Schedule of other expense	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfDetailedInformationOfOtherExpenseTableTextBlock
355	30903 - Disclosure - Business combination (Tables)	Network	*	*	http://www.maxar.com/role/DisclosureBusinessCombinationTables
356	Implied Table	Table	*	*	implied:Table
357	Business combination	Abstract			ifrs-full:DisclosureOfBusinessCombinationsAbstract
358	Schedule of fair value of consideration transferred and the preliminary estimated fair values of assets acquired and liabilities assumed	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutBusinessCombinationsExplanatory
359	31003 - Disclosure - Trade and other receivables (Tables)	Network	*	*	http://www.maxar.com/role/DisclosureTradeAndOtherReceivablesTables
360	Implied Table	Table	*	*	implied:Table
361	Trade and other receivables	Abstract			ifrs-full:TradeAndOtherReceivablesAbstract
362	Trade and other receivables	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfTradeAndOtherReceivablesTableTextBlock
363	31103 - Disclosure - Financial assets and liabilities, other (Tables)	Network	*	*	http://www.maxar.com/role/DisclosureFinancialAssetsAndLiabilitiesOtherTables
364	Implied Table	Table	*	*	implied:Table
365	Financial assets and liabilities, other	Abstract			maxr:DisclosureOfFinancialAssetsAndLiabilitiesOtherAbstract
366	Schedule of financial assets, other	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfOtherFinancialAssetsTableTextBlock
367	Schedule of financial liabilities, other	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfFinancialLiabilitiesTableTextBlock
368	31203 - Disclosure - Maturities of certain current assets and liabilities (Tables)	Network	*	*	http://www.maxar.com/role/DisclosureMaturitiesOfCertainCurrentAssetsAndLiabilitiesTables
369	Implied Table	Table	*	*	implied:Table
370	Maturities of certain current assets and liabilities	Abstract			maxr:DisclosureOfMaturitiesOfCertainCurrentAssetsAndLiabilitiesAbstract
371	Schedule of maturities of certain current assets and liabilities	Concept (Text Block (HTML))	For Period		maxr:MaturitiesOfCertainCurrentAssetsAndLiabilitiesTableTextBlock
372	31303 - Disclosure - Non-financial assets and liabilities (Tables)	Network	*	*	http://www.maxar.com/role/DisclosureNonFinancialAssetsAndLiabilitiesTables
373	Implied Table	Table	*	*	implied:Table
374	Non-financial assets and liabilities	Abstract			maxr:DisclosureOfNonFinancialAssetsAndLiabilitiesAbstract
375	Schedule of non financial assets and liabilities	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfNonFinancialAssetsAndLiabilitiesTableTextBlock
376	31401 - Disclosure - Orbital receivables (Tables)	Network	*	*	http://www.maxar.com/role/DisclosureOrbitalReceivablesTables
377	Implied Table	Table	*	*	implied:Table
378	Orbital receivables	Abstract			maxr:DisclosureOfOrbitalReceivableAbstract
379	The schedule of expected timing of billing and collection of orbital receivables relating to launched and unlaunched satellites	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfExpectedBillingAndCollectionOfOrbitalReceivablesTextBlock
380	The schedule of expected timing of total contractual cash flows for all launched and unlaunched satellites including principal and interest payments	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfExpectedPeriodOfTotalContractualCashFlowsTextBlock
381	31503 - Disclosure - Property, plant and equipment (Tables)	Network	*	*	http://www.maxar.com/role/DisclosurePropertyPlantAndEquipmentTables
382	Disclosure of detailed information about property, plant and equipment [table]	Table	*	*	ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
383	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
384	Property, plant and equipment	Member			ifrs-full:PropertyPlantAndEquipmentMember
385	Satellites	Member			maxr:SatellitesMember
386	Property, plant and equipment	LineItems			ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
387	Schedule of property plant and equipment	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
388	Schedule of assets under finance leases	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeExplanatory
389	31603 - Disclosure - Intangible assets and goodwill (Tables)	Network	*	*	http://www.maxar.com/role/DisclosureIntangibleAssetsAndGoodwillTables
390	Implied Table	Table	*	*	implied:Table
391	Intangible assets and goodwill	Abstract			ifrs-full:DisclosureOfIntangibleAssetsAbstract
392	Schedule of finite lived intangible assets	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutIntangibleAssetsExplanatory
393	Schedule of reconciliation of changes in goodwill	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfReconciliationOfChangesInGoodwillExplanatory
394	Schedule of key assumptions used in performing the impairment test	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfKeyAssumptionsUsedInPerformingImpairmentTestTableTextBlock
395	31703 - Disclosure - Provisions (Tables)	Network	*	*	http://www.maxar.com/role/DisclosureProvisionsTables
396	Implied Table	Table	*	*	implied:Table
397	Provisions	Abstract			ifrs-full:DisclosureOfOtherProvisionsAbstract
398	Schedule of warranty and after sale service, restructuring costs and other Provisions	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOtherProvisionsExplanatory
399	31803 - Disclosure - Employee benefits (Tables)	Network	*	*	http://www.maxar.com/role/DisclosureEmployeeBenefitsTables
400	Disclosure of net defined benefit liability (asset) [table]	Table	*	*	ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
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403	Pension Plans	Member			maxr:PensionPlansMember
404	Other post-retirement plans	Member			maxr:OtherPostRetirementPansMember
405	Employee benefits	LineItems			ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
406	Schedule of employee benefit liabilities	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfEmployeeBenefitLiabilitiesTableTextBlock
407	Schedule of movement in net defined benefit liability	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory
408	Schedule of plan assets	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFairValueOfPlanAssetsExplanatory
409	Weighted-average of the principle actuarial assumptions	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfWeightedAverageOfPrincipleActuarialAssumptionsTableTextBlock
410	Schedule of Sensitivity analysis	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsExplanatory
411	31903 - Disclosure - Long-term debt (Tables)	Network	*	*	http://www.maxar.com/role/DisclosureLongTermDebtTables
412	Implied Table	Table	*	*	implied:Table
413	Long-term debt	Abstract			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsAbstract
414	Schedule of long term debt	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsExplanatory
415	Schedule of annual contractual principal repayments on long-term debt	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfAnnualContractualPrincipalRepaymentsOnLongTermDebtTableTextBlock
416	32003 - Disclosure - Shareholders' equity (Tables)	Network	*	*	http://www.maxar.com/role/DisclosureShareholdersEquityTables
417	Implied Table	Table	*	*	implied:Table
418	Shareholders equity	Abstract			ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
419	Schedule of equity	Concept (Text Block (HTML))	For Period		maxr:IfrsScheduleOfStockholdersEquityTableTextBlock
420	Schedule of dividend declared	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDividendsExplanatory
421	32103 - Disclosure - Earnings per common share (Tables)	Network	*	*	http://www.maxar.com/role/DisclosureEarningsPerCommonShareTables
422	Implied Table	Table	*	*	implied:Table
423	Earnings per common share	Abstract			ifrs-full:EarningsPerShareAbstract
424	Schedule of basic earnings per share	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfBasicEarningsPerShareTableTextBlock
425	Schedule of diluted earnings per share	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfDilutedEarningsPerShareTableTextBlock
426	32203 - Disclosure - Share-based payment plans (Tables)	Network	*	*	http://www.maxar.com/role/DisclosureShareBasedPaymentPlansTables
427	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
428	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
429	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
430	Cash-settled SARs	Member			maxr:CashSettleableShareAppreciationRightsMember
431	Equity-settled SARs	Member			maxr:EquitySettledShareAppreciationRightsMember
432	Restricted share units	Member			us-gaap:RestrictedStockUnitsRSUMember
433	Deferred share units	Member			maxr:DeferredShareUnitsMember
434	Equity-settled SARs, RSUs and DSUs	Member			maxr:EquitySettledShareAppreciationRightsAndDeferredShareUnitsMember
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436	Schedule of summary of instruments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfNumberAndWeightedAverageExercisePricesOfOtherEquityInstrumentsExplanatory
437	Schedule of summary of outstanding SARs	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingOtherEquityInstrumentsTableTextBlock
438	Schedule of total share based compensation expense	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfShareBasedCompensationExpenseTableTextBlock
439	Schedule of fair value measurements of other equity instruments	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfFairValueMeasureOfOtherEquityInstrumentsTableTextBlock
440	32303 - Disclosure - Financial instruments and fair value disclosures (Tables)	Network	*	*	http://www.maxar.com/role/DisclosureFinancialInstrumentsAndFairValueDisclosuresTables
441	Implied Table	Table	*	*	implied:Table
442	Financial instruments and fair value disclosures	Abstract			ifrs-full:DisclosureOfFinancialInstrumentsAbstract
443	Schedule of financial instruments and their carrying amounts	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutFinancialInstrumentsExplanatory
444	Schedule of analysis financial instruments carried at fair value	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFairValueOfFinancialInstrumentsExplanatory
445	Schedule of trade receivables and allowance for doubtful accounts	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfTradeReceivablesAndAllowanceForDoubtfulAccountsTableTextBlock
446	Schedule of aging of trade receivables at the reporting date	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialAssetsThatAreEitherPastDueOrImpairedExplanatory
447	Schedule of allowance for doubtful accounts	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfAllowanceForDoubtfulAccountsTableTextBlock
448	Schedule of maturities of contractual cash flows of financial liabilities	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfMaturitiesOfContractualCashFlowsOfFinancialLiabilitiesTableTextBlock
449	Schedule of effect of an increase or decrease in interest rate risks	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfInterestRateRiskTableTextBlock
450	Schedule of foreign exchange forward contracts outstanding	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfForeignExchangeForwardContractsOutstandingTableTextBlock
451	Schedule of cash flows associated with designated cashflow hedge and carrying amounts of hedging instruments	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfCashFlowsAssociatedWithDesignatedCashFlowHedgeAndCarryingAmountsOfHedgingInstrumentsTableTextBlock
452	Schedule of foreign exchange sensitivity	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfForeignExchangeSensitivityTableTextBlock
453	Schedule of carrying amounts of foreign exchange forward contracts that are subject to master netting agreements	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOffsettingOfFinancialAssetsAndFinancialLiabilitiesExplanatory
454	32403 - Disclosure - Capital management (Tables)	Network	*	*	http://www.maxar.com/role/DisclosureCapitalManagementTables
455	Implied Table	Table	*	*	implied:Table
456	Capital management	Abstract			ifrs-full:DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalAbstract
457	Schedule of Capital management	Concept (Text Block (HTML))	For Period		maxr:DisclosureOfCapitalManagementExplanatory
458	32603 - Disclosure - Income taxes (Tables)	Network	*	*	http://www.maxar.com/role/DisclosureIncomeTaxesTables
459	Implied Table	Table	*	*	implied:Table
460	Income taxes	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
461	Summary of income tax expense	Concept (Text Block (HTML))	For Period		maxr:IfrsScheduleOfComponentOfIncomeTaxExpenseBenefitTableTextBlock
462	Summary of reconciliation between statutory and effective income tax	Concept (Text Block (HTML))	For Period		maxr:ScheduleOfReconciliationBetweenStatutoryAndEffectiveIncomeTaxTableTextBlock
463	Summary of Unrecognized deferred tax assets	Concept (Text Block (HTML))	For Period		maxr:ScheduleOfUnrecognizedDeferredTaxAssetsTableTextBlock
464	Summary of Recognized deferred tax assets and liabilities	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsExplanatory
465	Summary of movements of deferred tax assets and liabilities	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDeferredTaxesExplanatory
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476	Statement [Table]	Table	*	*	us-gaap:StatementTable
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491	Equipment	Member			ifrs-full:OfficeEquipmentMember
492	Test and other equipment	Member			maxr:TestAndOtherEquipmentMember
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568	Services contracts	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromRenderingOfServices
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724	Liability to dissenting shareholders	Concept (Monetary)	As Of	Credit	maxr:LiabilityToDissentingShareholders
725	Issuance of replacement equity-settled awards	Concept (Monetary)	As Of	Credit	maxr:IssuanceOfReplacementEquitySettledAwards
726	Purchase consideration	Concept (Monetary)	As Of	Credit	ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred
727	40906 - Disclosure - Business combination - Preliminary estimated fair value (Details)	Network	*	*	http://www.maxar.com/role/DisclosureBusinessCombinationPreliminaryEstimatedFairValueDetails
728	Disclosure of detailed information about business combination [table]	Table	*	*	ifrs-full:DisclosureOfBusinessCombinationsTable
729	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
730	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
731	DigitalGlobe	Member			maxr:DigitalGlobeIncMember
732	Business combination	LineItems			ifrs-full:DisclosureOfBusinessCombinationsLineItems
733	Assets and liabilities	Abstract			ifrs-full:AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract
734	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate
735	Trade and other receivables	Concept (Monetary)	As Of	Debit	ifrs-full:FairValueOfAcquiredReceivables
736	Financial assets, other	Concept (Monetary)	As Of	Debit	maxr:FinancialAssetsOtherRecognisedAsOfAcquisitionDate
737	Current tax assets	Concept (Monetary)	As Of	Debit	maxr:CurrentTaxAssetsRecognisedAsOfAcquisitionDate
738	Non-financial assets	Concept (Monetary)	As Of	Debit	maxr:NonfinancialAssetsRecognisedAsOfAcquisitionDate
739	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate
740	Definite life intangible assets	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate
741	Total assets	Concept (Monetary)	As Of	Debit	maxr:TotalAssetsRecognisedAsOfAcquisitionDate
742	Trade and other payables	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherPayablesRecognisedAsOfAcquisitionDate
743	Current tax liabilities	Concept (Monetary)	As Of	Credit	maxr:CurrentTaxLiabilitiesRecognisedAsOfAcquisitionDate
744	Provisions	Concept (Monetary)	As Of	Credit	maxr:ProvisionsRecognisedAsOfAcquisitionDate
745	Employee benefits	Concept (Monetary)	As Of	Credit	maxr:EmployeeBenefitsRecognisedAsOfAcquisitionDate
746	Non-financial liabilities	Concept (Monetary)	As Of	Credit	maxr:NonFinancialLiabilitiesRecognisedAsOfAcquisitionDate
747	Deferred tax liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilitiesRecognisedAsOfAcquisitionDate
748	Long-term debt	Concept (Monetary)	As Of	Credit	ifrs-full:BorrowingsRecognisedAsOfAcquisitionDate
749	Total liabilities	Concept (Monetary)	As Of	Credit	maxr:TotalLiabilitiesRecognisedAsOfAcquisitionDate
750	Fair value of net identifiable assets acquired	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableAssetsAcquiredLiabilitiesAssumed
751	Goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
752	40907 - Disclosure - Business combination - Trade receivable and Goodwill (Details)	Network	*	*	http://www.maxar.com/role/DisclosureBusinessCombinationTradeReceivableAndGoodwillDetails
753	Disclosure of detailed information about business combination [table]	Table	*	*	ifrs-full:DisclosureOfBusinessCombinationsTable
754	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
755	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
756	DigitalGlobe	Member			maxr:DigitalGlobeIncMember
757	Business combination	LineItems			ifrs-full:DisclosureOfBusinessCombinationsLineItems
758	Trade and other receivables, gross	Concept (Monetary)	As Of	Debit	ifrs-full:GrossContractualAmountsReceivableForAcquiredReceivables
759	Estimated to be uncollectable	Concept (Monetary)	As Of	Debit	ifrs-full:BestEstimateAtAcquisitionDateOfContractualCashFlowsNotExpectedToBeCollectedForAcquiredReceivables
760	Investment banking fees, legal, tax, consulting and other acquisition and integration costs	Concept (Monetary)	For Period	Debit	ifrs-full:AcquisitionrelatedCostsRecognisedAsExpenseForTransactionRecognisedSeparatelyFromAcquisitionOfAssetsAndAssumptionOfLiabilitiesInBusinessCombination
761	41001 - Disclosure - Trade and other receivables (Details)	Network	*	*	http://www.maxar.com/role/DisclosureTradeAndOtherReceivablesDetails
762	Implied Table	Table	*	*	implied:Table
763	Trade and other receivables	Abstract			ifrs-full:TradeAndOtherReceivablesAbstract
764	Trade accounts receivable, net	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTradeReceivables
765	Orbital receivables, current portion	Concept (Monetary)	As Of	Debit	maxr:CurrentOrbitalReceivables
766	Other	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentReceivables
767	Trade and other receivables, Total	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherCurrentReceivables
768	41101 - Disclosure - Financial assets and liabilities, other - Financial assets, other (Details)	Network	*	*	http://www.maxar.com/role/DisclosureFinancialAssetsAndLiabilitiesOtherFinancialAssetsOtherDetails
769	Disclosure of financial assets [table]	Table	*	*	ifrs-full:DisclosureOfFinancialAssetsTable
770	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
771	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
772	Restricted cash	Member			maxr:RestrictedCashMember
773	Long-term investments	Member			maxr:LongTermInvestmentsMember
774	Short-term investments	Member			maxr:ShortTermInvestmentMember
775	Notes receivable	Member			maxr:NotesReceivablesMember
776	Derivative financial instruments	Member			ifrs-full:DerivativesMember
777	Financial assets, other	LineItems			ifrs-full:DisclosureOfFinancialAssetsLineItems
778	Financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherFinancialAssets
779	Current portion	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentFinancialAssets
780	Non-current portion	Concept (Monetary)	As Of	Debit	ifrs-full:OtherNoncurrentFinancialAssets
781	41102 - Disclosure - Financial assets and liabilities, other - Financial liabilities, other (Details)	Network	*	*	http://www.maxar.com/role/DisclosureFinancialAssetsAndLiabilitiesOtherFinancialLiabilitiesOtherDetails
782	Disclosure of financial liabilities [table]	Table	*	*	ifrs-full:DisclosureOfFinancialLiabilitiesTable
783	Classes of financial liabilities [axis]	Axis			ifrs-full:ClassesOfFinancialLiabilitiesAxis
784	Financial liabilities	Member			ifrs-full:FinancialLiabilitiesMember
785	Non-trade payables	Member			maxr:NonTradePayablesMember
786	Derivative financial instruments	Member			ifrs-full:DerivativesMember
787	Financial liabilities, other	LineItems			ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
788	Financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:OtherFinancialLiabilities
789	Current portion	Concept (Monetary)	As Of	Credit	ifrs-full:OtherCurrentFinancialLiabilities
790	Non-current portion	Concept (Monetary)	As Of	Credit	ifrs-full:OtherNoncurrentFinancialLiabilities
791	41201 - Disclosure - Maturities of certain current assets and liabilities (Details)	Network	*	*	http://www.maxar.com/role/DisclosureMaturitiesOfCertainCurrentAssetsAndLiabilitiesDetails
792	Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [table]	Table	*	*	ifrs-full:DisclosureOfAmountsToBeRecoveredOrSettledAfterTwelveMonthsForClassesOfAssetsAndLiabilitiesThatContainAmountsToBeRecoveredOrSettledBothNoMoreAndMoreThanTwelveMonthsAfterReportingDateTable
793	Maturity [axis]	Axis			ifrs-full:MaturityAxis
794	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
795	Less than one year/2018	Member			ifrs-full:NotLaterThanOneYearMember
796	Due after one year	Member			ifrs-full:LaterThanOneYearMember
797	Maturities of certain current assets and liabilities:	LineItems			ifrs-full:DisclosureOfAmountsToBeRecoveredOrSettledAfterTwelveMonthsForClassesOfAssetsAndLiabilitiesThatContainAmountsToBeRecoveredOrSettledBothNoMoreAndMoreThanTwelveMonthsAfterReportingDateLineItems
798	Construction contract assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentContractAssets
799	Inventories	Concept (Monetary)	As Of	Debit	ifrs-full:Inventories
800	Non-financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentNonfinancialAssets
801	Non-financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:OtherCurrentNonfinancialLiabilities
802	Construction contract liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentContractLiabilities
803	41301 - Disclosure - Non-financial assets and liabilities (Details)	Network	*	*	http://www.maxar.com/role/DisclosureNonFinancialAssetsAndLiabilitiesDetails
804	Implied Table	Table	*	*	implied:Table
805	Non-financial assets and liabilities	Abstract			maxr:DisclosureOfNonFinancialAssetsAndLiabilitiesAbstract
806	Advances to suppliers	Concept (Monetary)	As Of	Debit	maxr:AdvancesToSuppliers
807	Prepaid expenses	Concept (Monetary)	As Of	Debit	maxr:PrepaidExpenses
808	Deferred contract costs	Concept (Monetary)	As Of	Debit	maxr:DeferredContractCosts
809	Equity investment in joint ventures	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInJointVenturesAccountedForUsingEquityMethod
810	Non-financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherNonfinancialAssets
811	Current portion	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentNonfinancialAssets
812	Non-current portion	Concept (Monetary)	As Of	Debit	ifrs-full:OtherNoncurrentNonfinancialAssets
813	Deferred revenue	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredIncome
814	Lease inducements	Concept (Monetary)	As Of	Credit	maxr:IfrsIncentiveFromLessor
815	Lease liability acquired	Concept (Monetary)	As Of	Credit	maxr:LeaseLiabilityAcquiredNonfinancialLiabilities
816	Other	Concept (Monetary)	As Of	Credit	maxr:MiscellaneousNonfinancialLiabilities
817	Non-financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:OtherNonfinancialLiabilities
818	Current portion	Concept (Monetary)	As Of	Credit	ifrs-full:OtherCurrentNonfinancialLiabilities
819	Non-current portion	Concept (Monetary)	As Of	Credit	ifrs-full:OtherNoncurrentNonfinancialLiabilities
820	41401 - Disclosure - Orbital receivables (Details)	Network	*	*	http://www.maxar.com/role/DisclosureOrbitalReceivablesDetails
821	Disclosure of Orbital Receivable [Table]	Table	*	*	maxr:DisclosureOfOrbitalReceivableTable
822	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
823	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
824	Orbital receivables	Member			maxr:OrbitalReceivableMember
825	Launched	Member			maxr:LaunchedSatelliteOrbitalReceivableMember
826	Unlaunched	Member			maxr:UnlaunchedSatelliteOrbitalReceivableMember
827	Maturity [axis]	Axis			ifrs-full:MaturityAxis
828	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
829	Less than one year/2018	Member			ifrs-full:NotLaterThanOneYearMember
830	1-2 Years/2019	Member			ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
831	2-3 Years/2020	Member			ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
832	3-4 Years/2021	Member			ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
833	4-5 Years/2022	Member			ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
834	More than five years	Member			ifrs-full:LaterThanFiveYearsMember
835	Range [axis]	Axis			ifrs-full:RangeAxis
836	Ranges [member]	Member			ifrs-full:RangesMember
837	Minimum	Member			ifrs-full:BottomOfRangeMember
838	Maximum	Member			ifrs-full:TopOfRangeMember
839	Orbital receivables	LineItems			maxr:DisclosureOfOrbitalReceivableLineItems
840	Present value discount rate of receivable (in percent)	Concept (Percent)	As Of		ifrs-full:DescriptionOfDiscountRatesUsedInCurrentEstimateOfValueInUse
841	Orbital receivables	Concept (Monetary)	As Of	Debit	maxr:OrbitalReceivable
842	Current portion	Concept (Monetary)	As Of	Debit	maxr:OrbitalReceivableCurrent
843	Non-current portion	Concept (Monetary)	As Of	Debit	maxr:OrbitalReceivablesNoncurrent
844	Total contractual cash flows	Concept (Monetary)	As Of	Debit	maxr:ConstructionContractFutureUndiscountedCashFlows
845	41402 - Disclosure - Orbital receivables - Revolving securitization facility agreement (Details)	Network	*	*	http://www.maxar.com/role/DisclosureOrbitalReceivablesRevolvingSecuritizationFacilityAgreementDetails
846	Ifrs Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table]	Table	*	*	maxr:IfrsScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable
847	Ifrs Type Of Arrangement [Axis]	Axis			maxr:IfrsTypeOfArrangementAxis
848	Ifrs Arrangements And Nonarrangement Transactions [Member]	Member			maxr:IfrsArrangementsAndNonarrangementTransactionsMember
849	Revolving securitization facility	Member			maxr:RevolvingSecuritizationFacilityAgreementMember
850	Range [axis]	Axis			ifrs-full:RangeAxis
851	Ranges [member]	Member			ifrs-full:RangesMember
852	Maximum	Member			ifrs-full:TopOfRangeMember
853	Orbital receivables	LineItems			maxr:DisclosureOfOrbitalReceivableLineItems
854	Maximum borrowing capacity	Concept (Monetary)	As Of	Credit	maxr:MaximumAmountOfSecuritizationFacility
855	Eligible orbital receivable sales term	Concept (xbrli:durationItemType)	For Period		maxr:TermOfEligibleOrbitalReceivable
856	Book value of orbital receivable sold under the facility	Concept (Monetary)	As Of	Debit	maxr:OrbitalReceivableBookValue
857	Net proceeds from sale of orbital receivables	Concept (Monetary)	For Period	Debit	maxr:ProceedsFromRevolvingSecuritizationFacility
858	Gross proceeds from sale of orbital receivables	Concept (Monetary)	For Period	Debit	maxr:GrossProceedsFromRevolvingSecuritizationFacility
859	Setup and transaction fees	Concept (Monetary)	For Period	Credit	maxr:AmountOfSetupAndTransactionFees
860	Unamortized balance	Concept (Monetary)	As Of	Credit	maxr:SecuritizationLiability
861	41501 - Disclosure - Property, plant and equipment (Details)	Network	*	*	http://www.maxar.com/role/DisclosurePropertyPlantAndEquipmentDetails
862	Disclosure of detailed information about property, plant and equipment [table]	Table	*	*	ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
863	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
864	Property, plant and equipment	Member			ifrs-full:PropertyPlantAndEquipmentMember
865	Land and buildings	Member			ifrs-full:LandAndBuildingsMember
866	Leasehold improvements	Member			ifrs-full:LeaseholdImprovementsMember
867	Equipment	Member			ifrs-full:OfficeEquipmentMember
868	Satellites	Member			maxr:SatellitesMember
869	Furniture and fixtures	Member			ifrs-full:FixturesAndFittingsMember
870	Computer hardware	Member			ifrs-full:ComputerEquipmentMember
871	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
872	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
873	Cost	Member			ifrs-full:GrossCarryingAmountMember
874	Accumulated depreciation	Member			ifrs-full:AccumulatedDepreciationAndAmortisationMember
875	Range [axis]	Axis			ifrs-full:RangeAxis
876	Ranges [member]	Member			ifrs-full:RangesMember
877	Minimum	Member			ifrs-full:BottomOfRangeMember
878	Maximum	Member			ifrs-full:TopOfRangeMember
879	Property, plant and equipment	LineItems			ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
880	Property, plant and equipment at beginning of period	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
881	Additions	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
882	Acquired from business combination (note 9)	Concept (Monetary)	For Period	Debit	ifrs-full:AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment
883	Depreciation expense	Concept (Monetary)	For Period		ifrs-full:DepreciationPropertyPlantAndEquipment
884	Disposals	Concept (Monetary)	For Period	Credit	ifrs-full:DisposalsPropertyPlantAndEquipment
885	Foreign currency translation	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment
886	Property, plant and equipment at end of period	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
887	Expenditures recognised property under construction	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipmentExpendituresRecognisedForConstructions
888	Capitalisation rate of borrowing costs eligible for capitalisation	Concept (Percent)	For Period		ifrs-full:CapitalisationRateOfBorrowingCostsEligibleForCapitalisation
889	41502 - Disclosure - Property, plant and equipment - Net book value of assets under finance leases (Details)	Network	*	*	http://www.maxar.com/role/DisclosurePropertyPlantAndEquipmentNetBookValueOfAssetsUnderFinanceLeasesDetails
890	Disclosure of recognised finance lease as assets by lessee [table]	Table	*	*	ifrs-full:DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeTable
891	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
892	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
893	Computer hardware	Member			ifrs-full:ComputerEquipmentMember
894	Furniture and fixtures	Member			ifrs-full:FixturesAndFittingsMember
895	Net book value of assets under finance leases	LineItems			ifrs-full:DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeLineItems
896	Recognised finance lease as assets	Concept (Monetary)	As Of	Debit	ifrs-full:RecognisedFinanceLeaseAsAssets
897	41503 - Disclosure - Property, plant and equipment - Satellite constellation (Details)	Network	*	*	http://www.maxar.com/role/DisclosurePropertyPlantAndEquipmentSatelliteConstellationDetails
898	Disclosure of detailed information about property, plant and equipment [table]	Table	*	*	ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
899	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
900	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
901	DigitalGlobe	Member			maxr:DigitalGlobeIncMember
902	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
903	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
904	Cost	Member			ifrs-full:GrossCarryingAmountMember
905	Accumulated depreciation	Member			ifrs-full:AccumulatedDepreciationAndAmortisationMember
906	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
907	Property, plant and equipment	Member			ifrs-full:PropertyPlantAndEquipmentMember
908	Satellites	Member			maxr:SatellitesMember
909	Satellites-in-orbit	Member			maxr:SatellitesInOrbitMember
910	Satellites under construction	Member			maxr:SatellitesUnderConstructionMember
911	Property, plant and equipment	LineItems			ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
912	Number of satellites	Concept (Integer)	As Of		maxr:NumberOfSatellites
913	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
914	41601 - Disclosure - Intangible assets and goodwill (Details)	Network	*	*	http://www.maxar.com/role/DisclosureIntangibleAssetsAndGoodwillDetails
915	Disclosure of reconciliation of changes in intangible assets and goodwill [table]	Table	*	*	ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable
916	Classes of intangible assets and goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
917	Intangible assets and goodwill	Member			ifrs-full:IntangibleAssetsAndGoodwillMember
918	Customer relationships	Member			ifrs-full:CustomerrelatedIntangibleAssetsMember
919	Backlog	Member			maxr:IfrsOrderOrProductionBacklogMember
920	Technologies, including development in-process	Member			ifrs-full:IntangibleAssetsUnderDevelopmentMember
921	Software	Member			ifrs-full:ComputerSoftwareMember
922	Trademarks and trade names	Member			maxr:IfrsTrademarksAndTradeNamesMember
923	Other	Member			ifrs-full:OtherIntangibleAssetsMember
924	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
925	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
926	Cost	Member			ifrs-full:GrossCarryingAmountMember
927	Accumulated depreciation	Member			ifrs-full:AccumulatedDepreciationAndAmortisationMember
928	Finite life intangible assets	LineItems			ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems
929	Balance at the beginning of the period	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsOtherThanGoodwill
930	Purchase of intangible assets	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
931	Acquired from business combination (note 9)	Concept (Monetary)	For Period	Debit	ifrs-full:AcquisitionsThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
932	Development of intangible assets	Concept (Monetary)	For Period	Debit	maxr:DevelopmentOfIntangibleAssetsOtherThanGoodwill
933	Amortization expense	Concept (Monetary)	For Period		ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill
934	Disposals	Concept (Monetary)	For Period	Credit	ifrs-full:DisposalsIntangibleAssetsOtherThanGoodwill
935	Foreign currency translation	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill
936	Balance at the end of the period	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsOtherThanGoodwill
937	41602 - Disclosure - Intangible assets and goodwill - Additional Information (Details)	Network	*	*	http://www.maxar.com/role/DisclosureIntangibleAssetsAndGoodwillAdditionalInformationDetails
938	Disclosure of reconciliation of changes in intangible assets and goodwill [table]	Table	*	*	ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable
939	Classes of intangible assets and goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
940	Intangible assets and goodwill	Member			ifrs-full:IntangibleAssetsAndGoodwillMember
941	Technologies, including development in-process	Member			ifrs-full:IntangibleAssetsUnderDevelopmentMember
942	Range [axis]	Axis			ifrs-full:RangeAxis
943	Ranges [member]	Member			ifrs-full:RangesMember
944	Minimum	Member			ifrs-full:BottomOfRangeMember
945	Maximum	Member			ifrs-full:TopOfRangeMember
946	Income Statement Location [Axis]	Axis			us-gaap:IncomeStatementLocationAxis
947	Income Statement Location [Domain]	Member			us-gaap:IncomeStatementLocationDomain
948	Direct costs, selling, general and administration	Member			us-gaap:SellingGeneralAndAdministrativeExpensesMember
949	Finite life intangible assets	LineItems			ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems
950	Borrowings costs capitalized	Concept (Monetary)	For Period		ifrs-full:BorrowingCostsCapitalised
951	Capitalization rate (as a percent)	Concept (Percent)	For Period		ifrs-full:CapitalisationRateOfBorrowingCostsEligibleForCapitalisation
952	Research and non-capitalizable development costs	Concept (Monetary)	For Period	Debit	ifrs-full:ResearchAndDevelopmentExpense
953	41603 - Disclosure - Intangible assets and goodwill - Goodwill (Details)	Network	*	*	http://www.maxar.com/role/DisclosureIntangibleAssetsAndGoodwillGoodwillDetails
954	Disclosure of reconciliation of changes in goodwill [table]	Table	*	*	ifrs-full:DisclosureOfReconciliationOfChangesInGoodwillTable
955	Segment consolidation items [axis]	Axis			ifrs-full:SegmentConsolidationItemsAxis
956	Entity's total for segment consolidation items [member]	Member			ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
957	Space Systems	Member			maxr:SpaceSystemsMember
958	Imagery	Member			maxr:ImageryMember
959	Services	Member			maxr:ServicesMember
960	Disclosure of reconciliation of changes in goodwill [line items]	LineItems			ifrs-full:DisclosureOfReconciliationOfChangesInGoodwillLineItems
961	Changes in goodwill	Abstract			ifrs-full:ReconciliationOfChangesInGoodwillAbstract
962	Balance at the beginning of the period	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
963	Goodwill on acquisition of DigitalGlobe (note 9)	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionalRecognitionGoodwill
964	Foreign currency translation	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesGoodwill
965	Balance at the end of the period	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
966	41604 - Disclosure - Intangible assets and goodwill - Goodwill Impairment (Details)	Network	*	*	http://www.maxar.com/role/DisclosureIntangibleAssetsAndGoodwillGoodwillImpairmentDetails
967	Disclosure of reconciliation of changes in goodwill [table]	Table	*	*	ifrs-full:DisclosureOfReconciliationOfChangesInGoodwillTable
968	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
969	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
970	DigitalGlobe	Member			maxr:DigitalGlobeIncMember
971	Segment consolidation items [axis]	Axis			ifrs-full:SegmentConsolidationItemsAxis
972	Entity's total for segment consolidation items [member]	Member			ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
973	Space Systems segment	Member			maxr:SpaceSystemsSegmentMember
974	Imagery segment	Member			maxr:ImagerySegmentMember
975	Services segment	Member			maxr:ServicesSegmentMember
976	Range [axis]	Axis			ifrs-full:RangeAxis
977	Ranges [member]	Member			ifrs-full:RangesMember
978	Maximum	Member			ifrs-full:TopOfRangeMember
979	Goodwill impairment	LineItems			ifrs-full:DisclosureOfReconciliationOfChangesInGoodwillLineItems
980	Number of operating segments	Concept (Integer)	For Period		us-gaap:NumberOfOperatingSegments
981	Number of cash generating units	Concept (Integer)	For Period		maxr:NumberOfCashGeneratingUnits
982	Goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
983	Goodwill reallocated from former segment (Surveillance and Intelligence) to current segments	Concept (Monetary)	As Of	Debit	maxr:GoodwillReallocatedToCurrentSegment
984	Impairment of goodwill	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossGoodwill
985	Discount rate	Concept (Percent)	As Of		ifrs-full:DescriptionOfDiscountRatesAppliedToCashFlowProjections
986	Perpetual growth rate	Concept (Percent)	As Of		ifrs-full:DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections
987	Estimated period of return	Concept (xbrli:durationItemType)	For Period		maxr:PeriodForEstimateOfExpectedRevenueEarningsBeforeInterestTaxesDepreciationAndAmortizationAndOperatingCashFlows
988	41701 - Disclosure - Provisions (Details)	Network	*	*	http://www.maxar.com/role/DisclosureProvisionsDetails
989	Disclosure of other provisions [table]	Table	*	*	ifrs-full:DisclosureOfOtherProvisionsTable
990	Classes of other provisions [axis]	Axis			ifrs-full:ClassesOfProvisionsAxis
991	Other provisions [member]	Member			ifrs-full:OtherProvisionsMember
992	Warranty and after sale service	Member			ifrs-full:WarrantyProvisionMember
993	Restructuring costs	Member			ifrs-full:RestructuringProvisionMember
994	Liability to dissenting shareholders	Member			maxr:LiabilityToDissentingShareholdersMember
995	Others	Member			ifrs-full:MiscellaneousOtherProvisionsMember
996	Disclosure of other provisions [line items]	LineItems			ifrs-full:DisclosureOfOtherProvisionsLineItems
997	Reconciliation of changes in other provisions	Abstract			ifrs-full:ReconciliationOfChangesInOtherProvisionsAbstract
998	Balance at the beginning of the period	Concept (Monetary)	As Of	Credit	ifrs-full:OtherProvisions
999	Provisions made	Concept (Monetary)	For Period	Credit	ifrs-full:NewProvisionsOtherProvisions
1000	Provisions acquired	Concept (Monetary)	For Period	Credit	ifrs-full:AcquisitionsThroughBusinessCombinationsOtherProvisions
1001	Provisions used	Concept (Monetary)	For Period	Debit	ifrs-full:ProvisionUsedOtherProvisions
1002	Provisions reversed	Concept (Monetary)	For Period	Debit	ifrs-full:UnusedProvisionReversedOtherProvisions
1003	Unwinding of discount	Concept (Monetary)	For Period	Credit	maxr:UnwindingOfDiscountOnProvisions
1004	Foreign currency translation	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions
1005	Balance at the end of the period	Concept (Monetary)	As Of	Credit	ifrs-full:OtherProvisions
1006	Current	Concept (Monetary)	As Of	Credit	ifrs-full:OtherShorttermProvisions
1007	Non-current	Concept (Monetary)	As Of	Credit	ifrs-full:OtherLongtermProvisions
1008	Total	Concept (Monetary)	As Of	Credit	ifrs-full:OtherProvisions
1009	41801 - Disclosure - Employee benefits - Employee benefit liabilities (Details)	Network	*	*	http://www.maxar.com/role/DisclosureEmployeeBenefitsEmployeeBenefitLiabilitiesDetails
1010	Implied Table	Table	*	*	implied:Table
1011	Employee benefits	Abstract			maxr:DisclosureOfEmployeeBenefitsAbstract
1012	Salary and benefits payable	Concept (Monetary)	As Of	Credit	maxr:SalaryAndBenefitsPayable
1013	Share-based payment plans	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilitiesFromSharebasedPaymentTransactions2011
1014	Pension and other post-retirement benefits	Concept (Monetary)	As Of	Credit	ifrs-full:RecognisedLiabilitiesDefinedBenefitPlan
1015	Employee benefits	Concept (Monetary)	As Of	Credit	ifrs-full:ProvisionsForEmployeeBenefits
1016	Current portion	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentProvisionsForEmployeeBenefits
1017	Non current portion	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentProvisionsForEmployeeBenefits
1018	41802 - Disclosure - Employee benefits - Movement in net defined benefit liability - Pension (Details)	Network	*	*	http://www.maxar.com/role/DisclosureEmployeeBenefitsMovementInNetDefinedBenefitLiabilityPensionDetails
1019	Disclosure of net defined benefit liability (asset) [table]	Table	*	*	ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1020	Defined benefit plans [axis]	Axis			ifrs-full:DefinedBenefitPlansAxis
1021	Employee benefits	Member			ifrs-full:DefinedBenefitPlansMember
1022	Pension Plans	Member			maxr:PensionPlansMember
1023	Net defined benefit liability (asset) [axis]	Axis			ifrs-full:NetDefinedBenefitLiabilityAssetAxis
1024	Net defined benefit liability (asset) [member]	Member			ifrs-full:NetDefinedBenefitLiabilityAssetMember
1025	Defined benefit obligation	Member			ifrs-full:PresentValueOfDefinedBenefitObligationMember
1026	Fair value of plan assets	Member			ifrs-full:PlanAssetsMember
1027	Employee benefits	LineItems			ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
1028	Estimated contributions expected to be paid	Concept (Monetary)	For Period	Credit	ifrs-full:EstimateOfContributionsExpectedToBePaidToPlan
1029	Net defined benefit liability (asset) at beginning of period	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1030	Current service cost	Concept (Monetary)	For Period	Credit	ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
1031	Past service costs	Concept (Monetary)	For Period	Credit	ifrs-full:PastServiceCostNetDefinedBenefitLiabilityAsset
1032	Liabilities extinguished/ assets distributed on settlement	Concept (Monetary)	For Period	Debit	ifrs-full:PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset
1033	Interest cost (income)	Concept (Monetary)	For Period	Credit	ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
1034	Total	Concept (Monetary)	For Period	Credit	maxr:NetDefinedBenefitLiabilityAssetIncludingInEarnings
1035	Actuarial loss (gain) arising from financial assumptions	Concept (Monetary)	For Period	Debit	ifrs-full:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset
1036	Actuarial loss (gain) arising from demographic assumptions	Concept (Monetary)	For Period	Debit	ifrs-full:ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset
1037	Actuarial loss (gain) arising from experience adjustment	Concept (Monetary)	For Period	Debit	ifrs-full:ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset
1038	Return on plan assets excluding interest income	Concept (Monetary)	For Period	Debit	ifrs-full:ReturnOnPlanAssetsNetDefinedBenefitLiabilityAsset
1039	Foreign exchange adjustment	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset
1040	Total	Concept (Monetary)	For Period	Credit	maxr:NetDefinedBenefitLiabilityAssetIncludingInOtherComprehensiveIncome
1041	Employer contributions	Concept (Monetary)	For Period	Debit	ifrs-full:ContributionsToPlanByEmployerNetDefinedBenefitLiabilityAsset
1042	Plan participant contributions	Concept (Monetary)	For Period	Debit	ifrs-full:ContributionsToPlanByPlanParticipantsNetDefinedBenefitLiabilityAsset
1043	Benefit payments	Concept (Monetary)	For Period	Debit	ifrs-full:PaymentsFromPlanNetDefinedBenefitLiabilityAsset
1044	Total	Concept (Monetary)	For Period	Credit	maxr:OtherContributionsToPlanNetDefinedBenefitLiabilityAsset
1045	Net defined benefit liability (asset) at end of period	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1046	Number of operating divisions that defined benefit pension plans were amended at	Concept (Integer)	For Period		maxr:NumberOfOperatingDivisionsDefinedBenefitPensionPlansWereAmendedAt
1047	Percentage of eligible participants	Concept (Percent)	For Period		maxr:PercentageOfEligibleParticipantsSelectedLumpsumPayout
1048	Gain on settlement	Concept (Monetary)	For Period	Credit	maxr:GainOnSettlementOfLumpsumPayout
1049	Discount rate	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfDiscountRates
1050	41803 - Disclosure - Employee benefits - Plan assets (Details)	Network	*	*	http://www.maxar.com/role/DisclosureEmployeeBenefitsPlanAssetsDetails
1051	Disclosure of net defined benefit liability (asset) [table]	Table	*	*	ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1052	Defined benefit plans [axis]	Axis			ifrs-full:DefinedBenefitPlansAxis
1053	Employee benefits	Member			ifrs-full:DefinedBenefitPlansMember
1054	Pension Plans	Member			maxr:PensionPlansMember
1055	Ifrs Defined Benefit Plan, Asset Categories [Axis]	Axis			maxr:IfrsDefinedBenefitPlanAssetCategoriesAxis
1056	Ifrs Plan Asset Categories [Domain]	Member			maxr:IfrsPlanAssetCategoriesDomain
1057	Cash and cash equivalents	Member			maxr:IfrsCashAndCashEquivalentsMember
1058	Canadian equity securities	Member			maxr:CanadianEquitySecuritiesMember
1059	U.S. equity securities	Member			maxr:U.s.EquitySecuritiesMember
1060	Global equity securities	Member			maxr:GlobalEquitySecuritiesMember
1061	Government bonds	Member			maxr:GovernmentBondsMember
1062	Corporate bonds	Member			maxr:CorporateBondsMember
1063	Equity funds	Member			maxr:IfrsEquityFundsMember
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1065	Real estate funds	Member			maxr:IfrsRealEstateFundsMember
1066	Employee benefits	LineItems			ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
1067	Total pension plan assets	Concept (Monetary)	As Of	Debit	ifrs-full:AssetsOfBenefitPlan
1068	41804 - Disclosure - Employee benefits - Movement in net defined benefit liability - Other post retirement plans (Details)	Network	*	*	http://www.maxar.com/role/DisclosureEmployeeBenefitsMovementInNetDefinedBenefitLiabilityOtherPostRetirementPlansDetails
1069	Disclosure of net defined benefit liability (asset) [table]	Table	*	*	ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1070	Defined benefit plans [axis]	Axis			ifrs-full:DefinedBenefitPlansAxis
1071	Employee benefits	Member			ifrs-full:DefinedBenefitPlansMember
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1073	Net defined benefit liability (asset) [axis]	Axis			ifrs-full:NetDefinedBenefitLiabilityAssetAxis
1074	Net defined benefit liability (asset) [member]	Member			ifrs-full:NetDefinedBenefitLiabilityAssetMember
1075	Defined benefit obligation	Member			ifrs-full:PresentValueOfDefinedBenefitObligationMember
1076	Fair value of plan assets	Member			ifrs-full:PlanAssetsMember
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1078	Estimated contributions expected to be paid	Concept (Monetary)	For Period	Credit	ifrs-full:EstimateOfContributionsExpectedToBePaidToPlan
1079	Net defined benefit liability (asset) at beginning of period	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1080	Current service cost	Concept (Monetary)	For Period	Credit	ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
1081	Past service costs	Concept (Monetary)	For Period	Credit	ifrs-full:PastServiceCostNetDefinedBenefitLiabilityAsset
1082	Interest cost (income)	Concept (Monetary)	For Period	Credit	ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
1083	Total	Concept (Monetary)	For Period	Credit	maxr:NetDefinedBenefitLiabilityAssetIncludingInEarnings
1084	Actuarial loss (gain) arising from financial assumptions	Concept (Monetary)	For Period	Debit	ifrs-full:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset
1085	Actuarial loss (gain) arising from demographic assumptions	Concept (Monetary)	For Period	Debit	ifrs-full:ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset
1086	Actuarial loss (gain) arising from experience adjustment	Concept (Monetary)	For Period	Debit	ifrs-full:ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset
1087	Foreign exchange adjustment	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset
1088	Total	Concept (Monetary)	For Period	Credit	maxr:NetDefinedBenefitLiabilityAssetIncludingInOtherComprehensiveIncome
1089	Employer contributions	Concept (Monetary)	For Period	Debit	ifrs-full:ContributionsToPlanByEmployerNetDefinedBenefitLiabilityAsset
1090	Plan participant contributions	Concept (Monetary)	For Period	Debit	ifrs-full:ContributionsToPlanByPlanParticipantsNetDefinedBenefitLiabilityAsset
1091	Benefit payments	Concept (Monetary)	For Period	Debit	ifrs-full:PaymentsFromPlanNetDefinedBenefitLiabilityAsset
1092	Total	Concept (Monetary)	For Period	Credit	maxr:OtherContributionsToPlanNetDefinedBenefitLiabilityAsset
1093	Net defined benefit liability (asset) at end of period	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1094	Gain on settlement	Concept (Monetary)	For Period	Credit	maxr:GainOnSettlementOfLumpsumPayout
1095	Discount rate	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfDiscountRates
1096	41805 - Disclosure - Employee benefits - Actuarial assumptions (Details)	Network	*	*	http://www.maxar.com/role/DisclosureEmployeeBenefitsActuarialAssumptionsDetails
1097	Disclosure of net defined benefit liability (asset) [table]	Table	*	*	ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1098	Net defined benefit liability (asset) [axis]	Axis			ifrs-full:NetDefinedBenefitLiabilityAssetAxis
1099	Net defined benefit liability (asset) [member]	Member			ifrs-full:NetDefinedBenefitLiabilityAssetMember
1100	Defined benefit obligation	Member			ifrs-full:PresentValueOfDefinedBenefitObligationMember
1101	Range [axis]	Axis			ifrs-full:RangeAxis
1102	Ranges [member]	Member			ifrs-full:RangesMember
1103	Minimum	Member			ifrs-full:BottomOfRangeMember
1104	Maximum	Member			ifrs-full:TopOfRangeMember
1105	Employee benefits	LineItems			ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
1106	Discount rate	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfDiscountRates
1107	Future salary increases	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreases
1108	Health care trends	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfMedicalCostTrendRates
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1114	41806 - Disclosure - Employee benefits - Sensitivity analysis (Details)	Network	*	*	http://www.maxar.com/role/DisclosureEmployeeBenefitsSensitivityAnalysisDetails
1115	Disclosure of net defined benefit liability (asset) [table]	Table	*	*	ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
1116	Net defined benefit liability (asset) [axis]	Axis			ifrs-full:NetDefinedBenefitLiabilityAssetAxis
1117	Net defined benefit liability (asset) [member]	Member			ifrs-full:NetDefinedBenefitLiabilityAssetMember
1118	Defined benefit obligation	Member			ifrs-full:PresentValueOfDefinedBenefitObligationMember
1119	Actuarial assumptions [axis]	Axis			ifrs-full:ActuarialAssumptionsAxis
1120	Actuarial assumptions [member]	Member			ifrs-full:ActuarialAssumptionsMember
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1122	Future salary growth	Member			ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreasesMember
1123	Health care trends rate	Member			ifrs-full:ActuarialAssumptionOfMedicalCostTrendRatesMember
1124	Future mortality	Member			ifrs-full:ActuarialAssumptionOfMortalityRatesMember
1125	Employee benefits	LineItems			ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
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1127	Decrease of 1%	Concept (Percent)	As Of		ifrs-full:PercentageOfReasonablyPossibleDecreaseInActuarialAssumption
1128	Increase in actuarial assumption	Concept (Monetary)	As Of	Credit	ifrs-full:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption
1129	Decrease in actuarial assumption	Concept (Monetary)	As Of	Credit	ifrs-full:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption
1130	41807 - Disclosure - Employee benefits - Defined contribution plans (Details)	Network	*	*	http://www.maxar.com/role/DisclosureEmployeeBenefitsDefinedContributionPlansDetails
1131	Disclosure of defined benefit plans [table]	Table	*	*	ifrs-full:DisclosureOfDefinedBenefitPlansTable
1132	Defined benefit plans [axis]	Axis			ifrs-full:DefinedBenefitPlansAxis
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1138	Estimated contributions expected to be paid	Concept (Monetary)	For Period	Credit	ifrs-full:EstimateOfContributionsExpectedToBePaidToPlan
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1141	41901 - Disclosure - Long-term debt (Details)	Network	*	*	http://www.maxar.com/role/DisclosureLongTermDebtDetails
1142	Disclosure of detailed information about borrowings [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
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1149	Term B loan payable	Member			maxr:TermBLoanPayableMember
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1152	Obligations under finance leases	Member			ifrs-full:LeaseLiabilitiesMember
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1159	41902 - Disclosure - Long-term debt - Narrative (Details)	Network	*	*	http://www.maxar.com/role/DisclosureLongTermDebtNarrativeDetails
1160	Disclosure of detailed information about borrowings [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
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1198	41903 - Disclosure - Long-term debt - Annual contractual principal repayments on long-term debt (Details)	Network	*	*	http://www.maxar.com/role/DisclosureLongTermDebtAnnualContractualPrincipalRepaymentsOnLongTermDebtDetails
1199	Disclosure of detailed information about borrowings [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
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1205	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1206	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
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1213	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1214	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
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1216	Employee Share Purchase Plan	Member			maxr:EmployeeSharePurchasePlanMember
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1219	Equity [member]	Member			ifrs-full:EquityMember
1220	Share Capital	Member			ifrs-full:IssuedCapitalMember
1221	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
1222	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
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1225	Par value per share	Concept (Share)	As Of		ifrs-full:ParValuePerShare
1226	Balance at beginning of period	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
1227	Common shares issued	Concept (Monetary)	For Period	Credit	ifrs-full:IssueOfEquity
1228	Balance at end of period	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
1229	Balance at beginning of period (in shares)	Concept (Shares)	As Of		ifrs-full:NumberOfSharesOutstanding
1230	Common shares issued (in shares)	Concept (Shares)	For Period		ifrs-full:IncreaseDecreaseInNumberOfSharesOutstanding
1231	Balance at end of period (in shares)	Concept (Shares)	As Of		ifrs-full:NumberOfSharesOutstanding
1232	Dividend per common share	Concept (Share)	For Period		ifrs-full:DividendsPaidOrdinarySharesPerShare
1233	Dividends	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsPaidOrdinaryShares
1234	42101 - Disclosure - Earnings per common share (Details)	Network	*	*	http://www.maxar.com/role/DisclosureEarningsPerCommonShareDetails
1235	Implied Table	Table	*	*	implied:Table
1236	Earnings per common share	Abstract			ifrs-full:EarningsPerShareAbstract
1237	Basic earnings per share	Abstract			ifrs-full:BasicEarningsPerShareAbstract
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1255	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
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1268	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
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1280	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1281	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
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1287	SARs issued	Concept (Decimal)	For Period		ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted
1288	SARs exercised	Concept (Decimal)	For Period		ifrs-full:NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement
1289	SARs cancelled	Concept (Decimal)	For Period		ifrs-full:NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement
1290	Outstanding, end of year	Concept (Decimal)	As Of		ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
1291	SARs exercisable, end of year	Concept (Decimal)	As Of		ifrs-full:NumberOfOtherEquityInstrumentsExercisableInSharebasedPaymentArrangement
1292	Weighted average exercise price	Abstract			maxr:WeightedAverageExercisePriceUnderShareBasedPaymentArrangementAbstract
1293	Outstanding, beginning of year	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
1294	Issued	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsGrantedInSharebasedPaymentArrangement
1295	SARs exercised	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement
1296	Cancelled	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement
1297	Outstanding, end of year	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
1298	SARs exercisable, end of year	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsExercisableInSharebasedPaymentArrangement
1299	42204 - Disclosure - Share-based payment plans - Cash settled SARs - Exercise price (Details)	Network	*	*	http://www.maxar.com/role/DisclosureShareBasedPaymentPlansCashSettledSarsExercisePriceDetails
1300	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1301	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1302	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
1303	Cash-settled SARs	Member			maxr:CashSettleableShareAppreciationRightsMember
1304	Ranges Of Exercise Prices For Outstanding Other Equity Instruments [Axis]	Axis			maxr:RangesOfExercisePricesForOutstandingOtherEquityInstrumentsAxis
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1310	$78.54 to $82.73	Member			maxr:ExercisePriceRange78.54To82.73Member
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1312	$92.13 to $97.93	Member			maxr:ExercisePriceRange92.13To97.93Member
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1326	42205 - Disclosure - Share-based payment plans - Equity settled SARs - Summary (Details)	Network	*	*	http://www.maxar.com/role/DisclosureShareBasedPaymentPlansEquitySettledSarsSummaryDetails
1327	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1328	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
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1334	SARs issued	Concept (Decimal)	For Period		ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted
1335	SARs exercised	Concept (Decimal)	For Period		ifrs-full:NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement
1336	SARs cancelled	Concept (Decimal)	For Period		ifrs-full:NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement
1337	Outstanding, end of year	Concept (Decimal)	As Of		ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
1338	SARs exercisable, end of year	Concept (Decimal)	As Of		ifrs-full:NumberOfOtherEquityInstrumentsExercisableInSharebasedPaymentArrangement
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1341	Issued	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsGrantedInSharebasedPaymentArrangement
1342	SARs exercised	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement
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1344	Outstanding, end of year	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
1345	SARs exercisable, end of year	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfOtherEquityInstrumentsExercisableInSharebasedPaymentArrangement
1346	42206 - Disclosure - Share-based payment plans - Equity settled SARs - Exercise price (Details)	Network	*	*	http://www.maxar.com/role/DisclosureShareBasedPaymentPlansEquitySettledSarsExercisePriceDetails
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1348	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
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1370	42207 - Disclosure - Share-based payment plans - Restricted share units (Details)	Network	*	*	http://www.maxar.com/role/DisclosureShareBasedPaymentPlansRestrictedShareUnitsDetails
1371	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
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1399	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
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1406	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1407	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
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1473	42301 - Disclosure - Financial instruments and fair value disclosures - Financial instruments by category (Details)	Network	*	*	http://www.maxar.com/role/DisclosureFinancialInstrumentsAndFairValueDisclosuresFinancialInstrumentsByCategoryDetails
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1565	42304 - Disclosure - Financial instruments and fair value disclosures - Trade receivables and allowance for doubtful accounts (Details)	Network	*	*	http://www.maxar.com/role/DisclosureFinancialInstrumentsAndFairValueDisclosuresTradeReceivablesAndAllowanceForDoubtfulAccountsDetails
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1599	42307 - Disclosure - Financial instruments and fair value disclosures - Maturities of contractual cash flows (Details)	Network	*	*	http://www.maxar.com/role/DisclosureFinancialInstrumentsAndFairValueDisclosuresMaturitiesOfContractualCashFlowsDetails
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1638	42309 - Disclosure - Financial instruments and fair value disclosures - Summary of foreign exchange forward contracts outstanding (Details)	Network	*	*	http://www.maxar.com/role/DisclosureFinancialInstrumentsAndFairValueDisclosuresSummaryOfForeignExchangeForwardContractsOutstandingDetails
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1657	42310 - Disclosure - Financial instruments and fair value disclosures - Cash flow hedges (Details)	Network	*	*	http://www.maxar.com/role/DisclosureFinancialInstrumentsAndFairValueDisclosuresCashFlowHedgesDetails
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1675	42311 - Disclosure - Financial instruments and fair value disclosures - Net investment hedges (Details)	Network	*	*	http://www.maxar.com/role/DisclosureFinancialInstrumentsAndFairValueDisclosuresNetInvestmentHedgesDetails
1676	Disclosure of detailed information about hedges [table]	Table	*	*	ifrs-full:DisclosureOfHedgeAccountingTable
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1689	42312 - Disclosure - Financial instruments and fair value disclosures - Foreign exchange sensitivity (Details)	Network	*	*	http://www.maxar.com/role/DisclosureFinancialInstrumentsAndFairValueDisclosuresForeignExchangeSensitivityDetails
1690	Disclosure of nature and extent of risks arising from financial instruments [table]	Table	*	*	ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
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1707	42313 - Disclosure - Financial instruments and fair value disclosures - Master netting agreements derivative financial assets: (Details)	Network	*	*	http://www.maxar.com/role/DisclosureFinancialInstrumentsAndFairValueDisclosuresMasterNettingAgreementsDerivativeFinancialAssetsDetails
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1713	Disclosure of offsetting of financial assets [line items]	LineItems			ifrs-full:DisclosureOfOffsettingOfFinancialAssetsLineItems
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1717	42314 - Disclosure - Financial instruments and fair value disclosures - Master netting agreements derivative financial liabilities (Details)	Network	*	*	http://www.maxar.com/role/DisclosureFinancialInstrumentsAndFairValueDisclosuresMasterNettingAgreementsDerivativeFinancialLiabilitiesDetails
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1727	42401 - Disclosure - Capital management (Details)	Network	*	*	http://www.maxar.com/role/DisclosureCapitalManagementDetails
1728	Implied Table	Table	*	*	implied:Table
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1735	42501 - Disclosure - Government assistance (Details)	Network	*	*	http://www.maxar.com/role/DisclosureGovernmentAssistanceDetails
1736	Disclosure of Government Assistance [Table]	Table	*	*	maxr:DisclosureOfGovernmentAssistanceTable
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1766	42601 - Disclosure - Income taxes - Income tax expense (Details)	Network	*	*	http://www.maxar.com/role/DisclosureIncomeTaxesIncomeTaxExpenseDetails
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1787	42602 - Disclosure - Income taxes - Reconciliation of income taxes (Details)	Network	*	*	http://www.maxar.com/role/DisclosureIncomeTaxesReconciliationOfIncomeTaxesDetails
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1799	42603 - Disclosure - Income taxes - Unrecognized deferred tax assets (Details)	Network	*	*	http://www.maxar.com/role/DisclosureIncomeTaxesUnrecognizedDeferredTaxAssetsDetails
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1887	Total	Concept (Monetary)	For Period	Credit	maxr:ContractualCommitmentAmount
1888	Total lease expenses	Concept (Monetary)	For Period	Debit	ifrs-full:RentalExpense
1889	42702 - Disclosure - Contingencies and commitments (Details)	Network	*	*	http://www.maxar.com/role/DisclosureContingenciesAndCommitmentsDetails
1890	Disclosure of contingent liabilities [table]	Table	*	*	ifrs-full:DisclosureOfContingentLiabilitiesTable
1891	Counterparties [axis]	Axis			ifrs-full:CounterpartiesAxis
1892	Counterparties [member]	Member			ifrs-full:CounterpartiesMember
1893	Export Development Canada	Member			maxr:ExportDevelopmentCanadaMember
1894	Contingencies and commitments	LineItems			ifrs-full:DisclosureOfContingentLiabilitiesLineItems
1895	Letters of credit	Concept (Monetary)	As Of	Credit	maxr:IfrsLineOfCreditOutstandingAmount
1896	42801 - Disclosure - Related party transactions (Details)	Network	*	*	http://www.maxar.com/role/DisclosureRelatedPartyTransactionsDetails
1897	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
1898	Range [axis]	Axis			ifrs-full:RangeAxis
1899	Ranges [member]	Member			ifrs-full:RangesMember
1900	Minimum	Member			ifrs-full:BottomOfRangeMember
1901	Maximum	Member			ifrs-full:TopOfRangeMember
1902	Related party transactions	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
1903	Lump-sum payment term	Concept (xbrli:durationItemType)	For Period		maxr:LumpSumPaymentCompensationTermOnTerminationOrChangeOfControl
1904	Salaries and other benefits	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
1905	Post-employment benefits	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationPostemploymentBenefits
1906	Share-based payments	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationSharebasedPayment
1907	Total compensation	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensation
1908	Executive compensation settlement to a related party	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationTerminationBenefits
1909	42901 - Disclosure - Supplemental cash flow information - Changes in operating assets and liabilities - (Details)	Network	*	*	http://www.maxar.com/role/DisclosureSupplementalCashFlowInformationChangesInOperatingAssetsAndLiabilitiesDetails
1910	Implied Table	Table	*	*	implied:Table
1911	Supplemental cash flow information	Abstract			maxr:IfrsSupplementalCashFlowInformationAbstract
1912	Trade and other receivables	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables
1913	Construction contract assets	Concept (Monetary)	For Period	Debit	maxr:AdjustmentsForDecreaseIncreaseInContractAssets
1914	Financial assets, other	Concept (Monetary)	For Period	Debit	maxr:AdjustmentsForDecreaseIncreaseInOtherFinancialAssets
1915	Inventories	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInInventories
1916	Current tax assets	Concept (Monetary)	For Period	Debit	maxr:AdjustmentsForDecreaseIncreaseInCurrentTaxAssets
1917	Non-financial assets	Concept (Monetary)	For Period	Debit	maxr:AdjustmentsForDecreaseIncreaseInNonFinancialAssets
1918	Orbital receivables	Concept (Monetary)	For Period	Debit	maxr:AdjustmentsForDecreaseIncreaseInOrbitalReceivables
1919	Trade and other payables	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables
1920	Financial liabilities, other	Concept (Monetary)	For Period	Debit	maxr:AdjustmentsForIncreaseDecreaseInOtherFinancialLiabilities
1921	Provisions	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForProvisions
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1923	Employee benefits	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncreaseDecreaseInEmployeeBenefitLiabilities
1924	Non-financial liabilities	Concept (Monetary)	For Period	Debit	maxr:AdjustmentsForIncreaseDecreaseInNonFinancialLiabilities
1925	Total changes in operating assets and liabilities	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseInWorkingCapital
1926	42902 - Disclosure - Supplemental cash flow information - Cash and cash equivalents - (Details)	Network	*	*	http://www.maxar.com/role/DisclosureSupplementalCashFlowInformationCashAndCashEquivalentsDetails
1927	Implied Table	Table	*	*	implied:Table
1928	Supplemental cash flow information	Abstract			maxr:IfrsSupplementalCashFlowInformationAbstract
1929	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
1930	Bank overdrafts	Concept (Monetary)	As Of	Credit	ifrs-full:BankOverdraftsClassifiedAsCashEquivalents
1931	Total cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition
1932	42903 - Disclosure - Supplemental cash flow information - Acquisition of DigitalGlobe (Details)	Network	*	*	http://www.maxar.com/role/DisclosureSupplementalCashFlowInformationAcquisitionOfDigitalglobeDetails
1933	Statement [Table]	Table	*	*	us-gaap:StatementTable
1934	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
1935	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
1936	DigitalGlobe	Member			maxr:DigitalGlobeIncMember
1937	Supplemental cash flow information	LineItems			maxr:SupplementalCashFlowInformationLineItems
1938	Acquisition	Concept (Monetary)	As Of	Credit	ifrs-full:CashTransferred
1939	Repayment of long-term debt	Concept (Monetary)	For Period	Credit	ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
1940	Settlement of transaction costs	Concept (Monetary)	For Period	Credit	maxr:PaymentsOfTransactionCostsInBusinessAcquisition
1941	Cash acquired	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate
1942	Total	Concept (Monetary)	For Period	Credit	ifrs-full:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
1943	42904 - Disclosure - Supplemental cash flow information - Reconciliation of liabilities arising from financing activities (Details)	Network	*	*	http://www.maxar.com/role/DisclosureSupplementalCashFlowInformationReconciliationOfLiabilitiesArisingFromFinancingActivitiesDetails
1944	Disclosure of reconciliation of liabilities arising from financing activities [table]	Table	*	*	ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesTable
1945	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
1946	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
1947	2017 Term notes	Member			maxr:TwoThousandSeventeenTermNotesMember
1948	2024 Term notes	Member			maxr:TwoThousandTwentyFourTermNotesMember
1949	Liabilities arising from financing activities [axis]	Axis			ifrs-full:LiabilitiesArisingFromFinancingActivitiesAxis
1950	Liabilities arising from financing activities [member]	Member			ifrs-full:LiabilitiesArisingFromFinancingActivitiesMember
1951	Long-term debt	Member			maxr:IfrsLongTermDebtMember
1952	Securitization liability	Member			maxr:SecuritizationLiabilityMember
1953	Obligations under finance leases	Member			ifrs-full:LeaseLiabilitiesMember
1954	Financial liabilities	Member			ifrs-full:FinancialLiabilitiesMember
1955	Supplemental cash flow information	LineItems			ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesLineItems
1956	Balance as at beginning of period	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilitiesArisingFromFinancingActivities
1957	Repayment of revolving loan facility and other long-term debt	Concept (Monetary)	For Period	Debit	maxr:DecreaseThroughRepaymentOfRevolvingLoanFacilityAndOtherLongTermDebtLiabilitiesArisingFromFinancingActivities
1958	Repayment of term notes	Concept (Monetary)	For Period	Debit	maxr:DecreaseThroughRepaymentOfDebtLiabilitiesArisingFromFinancingActivities
1959	Payments on finance leases	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseThroughNewLeasesLiabilitiesArisingFromFinancingActivities
1960	Interest paid on long-term debt	Concept (Monetary)	For Period	Debit	maxr:DecreaseThroughPaymentOfInterestOnLongTermDebtLiabilitiesArisingFromFinancingActivities
1961	Settlement of securitization liability, including interest	Concept (Monetary)	For Period	Debit	maxr:DecreaseThroughSettlementOfSecuritizationLiabilityLiabilitiesArisingFromFinancingActivities
1962	Repayment of interest free government assistance	Concept (Monetary)	For Period	Debit	maxr:DecreaseThroughRepaymentOfInterestFreeGovernmentAssistanceLiabilitiesArisingFromFinancingActivities
1963	Total changes from financing cash flows	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughFinancingCashFlowsLiabilitiesArisingFromFinancingActivities
1964	Issuance of long-term debt related to acquisition, net of financing fees (note 9)	Concept (Monetary)	For Period	Credit	maxr:IncreaseThroughIssuanceOfLongTermDebtRelatedToAcquisitionLiabilitiesArisingFromFinancingActivities
1965	The effect of changes in foreign exchange rates	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities
1966	Amortization of financing fees	Concept (Monetary)	For Period	Credit	maxr:IncreaseThroughAmortizationOfFinancingFeesLiabilitiesArisingFromFinancingActivities
1967	New finance leases	Concept (Monetary)	For Period	Credit	maxr:IncreaseThroughNewFinanceLeasesLiabilitiesArisingFromFinancingActivities
1968	Finance leases acquired	Concept (Monetary)	For Period	Credit	maxr:IncreaseThroughFinanceLeasesAcquiredLiabilitiesArisingFromFinancingActivities
1969	Loss from early extinguishment of debt	Concept (Monetary)	For Period	Credit	maxr:IncreaseThroughLossFromEarlyExtinguishmentOfDebtLiabilitiesArisingFromFinancingActivities
1970	Finance expense	Concept (Monetary)	For Period	Credit	maxr:IncreaseThroughFinanceExpenseLiabilitiesArisingFromFinancingActivities
1971	Total liability related other changes	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughOtherChangesLiabilitiesArisingFromFinancingActivities
1972	Balance as at end of period	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilitiesArisingFromFinancingActivities
1973	43001 - Disclosure - Subsequent event - (Details)	Network	*	*	http://www.maxar.com/role/DisclosureSubsequentEventDetails
1974	Implied Table	Table	*	*	implied:Table
1975	Subsequent event	Abstract			ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodAbstract
1976	Dividend declared (per common share)	Concept (Share)	For Period		ifrs-full:DividendsProposedOrDeclaredBeforeFinancialStatementsAuthorisedForIssueButNotRecognisedAsDistributionToOwnersPerShare