QUEBECOR MEDIA INC (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.quebecor.com/role/DocumentDocumentAndEntityInformation
2	Implied Table	Table	*	*	implied:Table
3	Document and Entity Information [Abstract]	Abstract			qbmi: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 Well-known Seasoned Issuer	Concept (Yes/No)	For Period		dei:EntityWellKnownSeasonedIssuer
11	Entity Voluntary Filers	Concept (Yes/No)	For Period		dei:EntityVoluntaryFilers
12	Entity Current Reporting Status	Concept (Yes/No)	For Period		dei:EntityCurrentReportingStatus
13	Entity Filer Category	Concept (Filer Category)	For Period		dei:EntityFilerCategory
14	Entity Emerging Growth Company	Concept (Yes/No)	For Period		dei:EntityEmergingGrowthCompany
15	Entity Shell Company	Concept (Yes/No)	For Period		dei:EntityShellCompany
16	Entity Common Stock, Shares Outstanding	Concept (Shares)	As Of		dei:EntityCommonStockSharesOutstanding
17	Document Fiscal Year Focus	Concept (Year)	For Period		dei:DocumentFiscalYearFocus
18	Document Fiscal Period Focus	Concept (Fiscal Period)	For Period		dei:DocumentFiscalPeriodFocus
19	00100 - Statement - CONSOLIDATED STATEMENTS OF INCOME	Network	*	*	http://www.quebecor.com/role/StatementConsolidatedStatementsOfIncome
20	Implied Table	Table	*	*	implied:Table
21	CONSOLIDATED STATEMENTS OF INCOME	Abstract			ifrs-full:IncomeStatementAbstract
22	Revenues	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromContractsWithCustomers
23	Employee costs	Concept (Monetary)	For Period	Debit	ifrs-full:EmployeeBenefitsExpense
24	Purchase of goods and services	Concept (Monetary)	For Period	Debit	ifrs-full:CostOfSales
25	Depreciation and amortization	Concept (Monetary)	For Period	Debit	ifrs-full:DepreciationAndAmortisationExpense
26	Financial expenses	Concept (Monetary)	For Period	Debit	ifrs-full:FinanceCosts
27	Loss on valuation and translation of financial instruments	Concept (Monetary)	For Period	Credit	qbmi:GainLossOnValuationAndTranslationOfFinancialInstruments
28	Restructuring of operations, litigation and other items	Concept (Monetary)	For Period	Credit	qbmi:IncomeExpenseFromRestructuringLitigationAndOtherItems
29	Gain on sale of spectrum licences	Concept (Monetary)	For Period	Credit	qbmi:GainLossOnSaleOfIntangibleAssetsWithIndefiniteUsefulLives
30	Impairment of goodwill and intangible assets	Concept (Monetary)	For Period	Debit	ifrs-full:ImpairmentLoss
31	Loss on debt refinancing	Concept (Monetary)	For Period	Credit	qbmi:GainLossOnDebtRefinancing
32	Income before income taxes	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossBeforeTax
33	Income taxes (recovery):	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
34	Current	Concept (Monetary)	For Period	Debit	ifrs-full:CurrentTaxExpenseIncome
35	Deferred	Concept (Monetary)	For Period	Debit	qbmi:DeferredTaxExpenseIncomeContinuingOperations
36	Income taxes	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
37	Income from continuing operations	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromContinuingOperations
38	Income from discontinued operations	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromDiscontinuedOperations
39	Net income	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
40	Income (loss) from continuing operations attributable to	Abstract			qbmi:IncomeLossFromContinuingOperationsAttributableToAbstract
41	Shareholders	Concept (Monetary)	For Period	Credit	ifrs-full:IncomeFromContinuingOperationsAttributableToOwnersOfParent
42	Non-controlling interests	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromContinuingOperationsAttributableToNoncontrollingInterests
43	Net income (loss) attributable to	Abstract			ifrs-full:ProfitLossAttributableToAbstract
44	Shareholders	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToOwnersOfParent
45	Non-controlling interests	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToNoncontrollingInterests
46	00200 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME	Network	*	*	http://www.quebecor.com/role/StatementConsolidatedStatementsOfComprehensiveIncome
47	Implied Table	Table	*	*	implied:Table
48	CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME	Abstract			ifrs-full:StatementOfComprehensiveIncomeAbstract
49	Income from continuing operations	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromContinuingOperations
50	Other comprehensive income (loss) from continuing operations:	Abstract			ifrs-full:OtherComprehensiveIncomeAbstract
51	Items that may be reclassified to income:	Abstract			ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract
52	Cash flows hedges:	Abstract			ifrs-full:CashFlowHedgesAbstract
53	(Loss) gain on valuation of derivative financial instruments	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnCashFlowHedgesBeforeTax
54	Deferred income taxes	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxRelatingToCashFlowHedgesOfOtherComprehensiveIncome
55	Items that will not be reclassified to income:	Abstract			ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract
56	Defined benefit plans:	Abstract			qbmi:DefinedBenefitPlansAbstract
57	Re-measurement (loss) gain	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
58	Deferred income taxes	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome
59	Reclassification to income:	Abstract			qbmi:ComponentsOfOtherComprehensiveIncomeReclassifiedToProfitOrLossNetOfTaxAbstract
60	Other comprehensive income (loss) from continuing operations	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncome
61	Comprehensive income from continuing operations	Concept (Monetary)	For Period	Credit	qbmi:ComprehensiveIncomeFromContinuingOperations
62	Income from discontinued operations	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromDiscontinuedOperations
63	Comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
64	Comprehensive income (loss) from continuing operations attributable to	Abstract			ifrs-full:ComprehensiveIncomeAttributableToAbstract
65	Shareholders	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
66	Non-controlling interests	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests
67	Comprehensive income (loss) attributable to	Abstract			qbmi:ComprehensiveIncomeLossIncludingDiscontinuedOperationsAttributableToAbstract
68	Shareholders	Concept (Monetary)	For Period	Credit	qbmi:ComprehensiveIncomeLossIncludingDiscontinuedOperationsAttributableToOwnersOfParents
69	Non-controlling interests	Concept (Monetary)	For Period	Credit	qbmi:ComprehensiveIncomeLossIncludingDiscontinuedOperationsAttributableToNonControllingInterest
70	00300 - Statement - CONSOLIDATED STATEMENTS OF EQUITY	Network	*	*	http://www.quebecor.com/role/StatementConsolidatedStatementsOfEquity
71	Statement of changes in equity [table]	Table	*	*	ifrs-full:StatementOfChangesInEquityTable
72	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
73	Equity [member]	Member			ifrs-full:EquityMember
74	Equity attributable to owners of parent [member]	Member			ifrs-full:EquityAttributableToOwnersOfParentMember
75	Capital stock	Member			ifrs-full:IssuedCapitalMember
76	Contributed surplus	Member			ifrs-full:SharePremiumMember
77	Deficit	Member			ifrs-full:RetainedEarningsMember
78	Accumulated other comprehensive loss	Member			ifrs-full:AccumulatedOtherComprehensiveIncomeMember
79	Equity attributable to non-controlling interests	Member			ifrs-full:NoncontrollingInterestsMember
80	Retrospective application and retrospective restatement [axis]	Axis			ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
81	Currently stated [member]	Member			ifrs-full:RestatedMember
82	Previously reported	Member			ifrs-full:PreviouslyStatedMember
83	Increase (decrease) due to changes in accounting policy and corrections of prior period errors [member]	Member			ifrs-full:IncreaseDecreaseDueToChangesInAccountingPolicyAndCorrectionsOfPriorPeriodErrorsMember
84	Increase (decrease) due to changes in accounting policy [member]	Member			ifrs-full:FinancialEffectOfChangesInAccountingPolicyMember
85	Increase (decrease) due to changes in accounting policy required by IFRSs [member]	Member			ifrs-full:IncreaseDecreaseDueToChangesInAccountingPolicyRequiredByIFRSsMember
86	Increase (decrease) due to application of IFRS 15	Member			ifrs-full:IncreaseDecreaseDueToApplicationOfIFRS15Member
87	CONSOLIDATED STATEMENTS OF EQUITY	LineItems			ifrs-full:StatementOfChangesInEquityLineItems
88	Equity at beginning of period	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
89	Net income (loss)	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
90	Other comprehensive income (loss)	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncome
91	Dividends	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsPaid
92	Reduction of paid-up capital	Concept (Monetary)	For Period	Debit	ifrs-full:ReductionOfIssuedCapital
93	Repurchase of shares	Concept (Monetary)	For Period	Debit	ifrs-full:PurchaseOfTreasuryShares
94	Equity at end of period	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
95	00400 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS	Network	*	*	http://www.quebecor.com/role/StatementConsolidatedStatementsOfCashFlows
96	Implied Table	Table	*	*	implied:Table
97	CONSOLIDATED STATEMENTS OF CASH FLOWS	Abstract			ifrs-full:StatementOfCashFlowsAbstract
98	Cash flows related to operating activities	Abstract			ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
99	Income from continuing operations	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromContinuingOperations
100	Adjustments for:	Abstract			ifrs-full:AdjustmentsForReconcileProfitLossAbstract
101	Depreciation of property, plant and equipment	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDepreciationExpense
102	Amortization of intangible assets	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForAmortisationExpense
103	Loss on valuation and translation of financial instruments	Concept (Monetary)	For Period	Debit	qbmi:AdjustmentForLossOnValuationAndTranslationOfFinancialInstruments
104	Gain on sale of spectrum licences	Concept (Monetary)	For Period	Credit	qbmi:GainLossOnSaleOfIntangibleAssetsWithIndefiniteUsefulLives
105	Restructuring of operations and impairment of goodwill and intangible assets	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss
106	Loss on debt refinancing	Concept (Monetary)	For Period	Debit	qbmi:AdjustmentForLossOnDebtRefinancing
107	Amortization of financing costs and long-term debt discount	Concept (Monetary)	For Period	Debit	qbmi:AdjustmentsForAmortizationOfFinancingCostsAndLongTermDebtDiscount
108	Deferred income taxes	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDeferredTaxExpense
109	Other	Concept (Monetary)	For Period	Debit	ifrs-full:OtherAdjustmentsToReconcileProfitLoss
110	Cash flows before non-cash balances	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital
111	Net change in non-cash balances related to operating activities	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseInWorkingCapital
112	Cash flows provided by continuing operating activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInOperatingActivitiesContinuingOperations
113	Cash flows related to investing activities	Abstract			ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
114	Business acquisitions	Concept (Monetary)	For Period	Credit	ifrs-full:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
115	Business disposals	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
116	Additions to property, plant and equipment	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
117	Additions to intangible assets	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities
118	Proceeds from disposals of assets	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromOtherLongtermAssetsClassifiedAsInvestingActivities
119	Loans to the parent corporation	Concept (Monetary)	For Period	Credit	ifrs-full:CashAdvancesAndLoansMadeToOtherPartiesClassifiedAsInvestingActivities
120	Acquisition of tax deductions from the parent corporation	Concept (Monetary)	For Period	Credit	qbmi:AcquisitionOfTaxDeductionsFromParentCorporation
121	Other	Concept (Monetary)	For Period	Debit	ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsInvestingActivities
122	Cash flows used in continuing investing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInInvestingActivitiesContinuingOperations
123	Cash flows related to financing activities	Abstract			ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
124	Net change in bank indebtedness	Concept (Monetary)	For Period	Debit	qbmi:CashInflowOutflowDueToChangeInBankIndebtedness
125	Net change under revolving facilities	Concept (Monetary)	For Period	Debit	qbmi:CashInflowOutflowDueToChangeInRevolvingFacilities
126	Issuance of long-term debt, net of financing fees	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromBorrowingsClassifiedAsFinancingActivities
127	Repayments of long-term debt	Concept (Monetary)	For Period	Credit	ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
128	Settlement of hedging contracts	Concept (Monetary)	For Period	Debit	qbmi:CashInflowOutflowFromSettlementOfHedgingContracts
129	Repurchase of Common Shares	Concept (Monetary)	For Period	Credit	ifrs-full:PaymentsToAcquireOrRedeemEntitysShares
130	Reduction of paid-up capital	Concept (Monetary)	For Period	Credit	qbmi:ReductionOfPaidUpCapital
131	Dividends	Concept (Monetary)	For Period	Credit	ifrs-full:DividendsPaidClassifiedAsFinancingActivities
132	Dividends paid to non-controlling interests	Concept (Monetary)	For Period	Credit	ifrs-full:DividendsPaidToNoncontrollingInterestsClassifiedAsFinancingActivities
133	Cash flows used in continuing financing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInFinancingActivitiesContinuingOperations
134	Net change in cash and cash equivalents from continuing operations	Concept (Monetary)	For Period	Debit	qbmi:IncreaseDecreaseInCashAndCashEquivalentsContinuingOperations
135	Cash flows provided by discontinued operations	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseInCashAndCashEquivalentsDiscontinuedOperations
136	Cash and cash equivalents at the beginning of the year	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
137	Cash and cash equivalents at the end of the year	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
138	Additional information on the consolidated statements of cash flows	Abstract			qbmi:AdditionalInformationRelatingToCashFlowsAbstract
139	Changes in non-cash balances related to operating activities (excluding the effect of business acquisitions and disposals)	Abstract			qbmi:ChangesInNonCashBalancesRelatedToOperatingActivitiesAbstract
140	Accounts receivable	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAccountReceivable
141	Inventories	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInInventories
142	Contract assets	Concept (Monetary)	For Period	Debit	qbmi:AdjustmentsForIncreaseDecreaseInContractAssets
143	Accounts payable, accrued charges and provisions	Concept (Monetary)	For Period	Debit	qbmi:AdjustmentsForIncreaseDecreaseInAccountsPayableAccruedChargesAndProvisions
144	Income taxes	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncomeTaxExpense
145	Deferred revenues	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncreaseDecreaseInDeferredIncome
146	Defined benefit plans	Concept (Monetary)	For Period	Debit	qbmi:AdjustmentsForIncreaseInDefinedBenefitPlans
147	Other	Concept (Monetary)	For Period	Debit	ifrs-full:OtherAdjustmentsForNoncashItems
148	Net change in non-cash balances related to operating activities	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseInWorkingCapital
149	Non-cash investing activities	Abstract			qbmi:NonCashInvestingActivitiesAbstract
150	Net change in additions to property, plant and equipment and intangible assets financed with accounts payable	Concept (Monetary)	For Period	Debit	qbmi:IncreaseDecreaseInPropertyPlantAndEquipmentAndIntangibleAssets
151	Interest and taxes reflected as operating activities	Abstract			qbmi:InterestAndTaxesReflectedAsOperatingActivitiesAbstract
152	Cash interest payments	Concept (Monetary)	For Period	Credit	ifrs-full:InterestPaidClassifiedAsOperatingActivities
153	Cash income tax payments (net of refunds)	Concept (Monetary)	For Period	Credit	ifrs-full:IncomeTaxesPaidRefundClassifiedAsOperatingActivities
154	00401 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS - Cash information	Network	*	*	http://www.quebecor.com/role/StatementConsolidatedStatementsOfCashFlowsCashInformation
155	Implied Table	Table	*	*	implied:Table
156	CONSOLIDATED STATEMENTS OF CASH FLOWS	Abstract			ifrs-full:StatementOfCashFlowsAbstract
157	Cash and cash equivalents consist of	Abstract			ifrs-full:CashAndCashEquivalentsAbstract
158	Cash	Concept (Monetary)	As Of	Debit	ifrs-full:Cash
159	Cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashEquivalents
160	Total cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
161	00500 - Statement - CONSOLIDATED BALANCE SHEETS	Network	*	*	http://www.quebecor.com/role/StatementConsolidatedBalanceSheets
162	Implied Table	Table	*	*	implied:Table
163	CONSOLIDATED BALANCE SHEETS	Abstract			ifrs-full:StatementOfFinancialPositionAbstract
164	Assets [abstract]	Abstract			ifrs-full:AssetsAbstract
165	Current assets	Abstract			ifrs-full:CurrentAssetsAbstract
166	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
167	Accounts receivable	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherCurrentReceivables
168	Contract assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentContractAssets
169	Income taxes	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTaxAssetsCurrent
170	Inventories	Concept (Monetary)	As Of	Debit	ifrs-full:Inventories
171	Other current assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentFinancialAssets
172	Assets held for sale	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners
173	Current assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssets
174	Non-current assets	Abstract			ifrs-full:NoncurrentAssetsAbstract
175	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
176	Intangible assets	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsOtherThanGoodwill
177	Goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
178	Derivative financial instruments	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentDerivativeFinancialAssets
179	Deferred income taxes	Concept (Monetary)	As Of	Debit	ifrs-full:DeferredTaxAssets
180	Loans to the parent corporation	Concept (Monetary)	As Of	Debit	ifrs-full:AmountsReceivableRelatedPartyTransactions
181	Other assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherNoncurrentFinancialAssets
182	Non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssets
183	Total assets	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
184	Equity and liabilities [abstract]	Abstract			ifrs-full:EquityAndLiabilitiesAbstract
185	Current liabilities	Abstract			ifrs-full:CurrentLiabilitiesAbstract
186	Bank indebtedness	Concept (Monetary)	As Of	Credit	ifrs-full:ShorttermBorrowings
187	Accounts payable and accrued charges	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayables
188	Provisions	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentProvisions
189	Deferred revenue	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredIncomeClassifiedAsCurrent
190	Income taxes	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentTaxLiabilitiesCurrent
191	Current portion of long-term debt	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentPortionOfLongtermBorrowings
192	Liabilities held for sale	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale
193	Current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentLiabilities
194	Non-current liabilities	Abstract			ifrs-full:NoncurrentLiabilitiesAbstract
195	Long-term debt	Concept (Monetary)	As Of	Credit	ifrs-full:LongtermBorrowings
196	Derivative financial instruments	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentDerivativeFinancialLiabilities
197	Other liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:OtherNoncurrentFinancialLiabilities
198	Deferred income taxes	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilities
199	Non-current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentLiabilities
200	Equity	Abstract			ifrs-full:EquityAbstract
201	Capital stock	Concept (Monetary)	As Of	Credit	ifrs-full:IssuedCapital
202	Contributed surplus	Concept (Monetary)	As Of	Credit	ifrs-full:SharePremium
203	Deficit	Concept (Monetary)	As Of	Credit	ifrs-full:RetainedEarnings
204	Accumulated other comprehensive loss	Concept (Monetary)	As Of	Credit	ifrs-full:AccumulatedOtherComprehensiveIncome
205	Equity attributable to shareholders	Concept (Monetary)	As Of	Credit	ifrs-full:EquityAttributableToOwnersOfParent
206	Non-controlling interests	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterests
207	Total equity	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
208	Commitments and contingencies	Concept (Monetary)	As Of	Credit	qbmi:IfrsCommitmentsAndContingencies
209	Guarantees	Concept (Monetary)	As Of	Credit	qbmi:Guarantees
210	Total liabilities and equity	Concept (Monetary)	As Of	Credit	ifrs-full:EquityAndLiabilities
211	10001 - Disclosure - SEGMENTED INFORMATION	Network	*	*	http://www.quebecor.com/role/DisclosureSegmentedInformation
212	Implied Table	Table	*	*	implied:Table
213	SEGMENTED INFORMATION	Abstract			ifrs-full:DisclosureOfOperatingSegmentsAbstract
214	SEGMENTED INFORMATION	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEntitysReportableSegmentsExplanatory
215	10101 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	Network	*	*	http://www.quebecor.com/role/DisclosureSummaryOfSignificantAccountingPolicies
216	Implied Table	Table	*	*	implied:Table
217	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	Abstract			qbmi:SummaryOfSignificantAccountingPoliciesAbstract
218	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
219	10201 - Disclosure - REVENUES	Network	*	*	http://www.quebecor.com/role/DisclosureRevenues
220	Implied Table	Table	*	*	implied:Table
221	REVENUES	Abstract			ifrs-full:RevenueAbstract
222	REVENUES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfRevenueExplanatory
223	10301 - Disclosure - EMPLOYEE COSTS AND PURCHASE OF GOODS AND SERVICES	Network	*	*	http://www.quebecor.com/role/DisclosureEmployeeCostsAndPurchaseOfGoodsAndServices
224	Implied Table	Table	*	*	implied:Table
225	EMPLOYEE COSTS AND PURCHASE OF GOODS AND SERVICES	Abstract			qbmi:EmployeeCostsAndPurchaseOfGoodsAndServicesAbstract
226	EMPLOYEE COSTS AND PURCHASE OF GOODS AND SERVICES	Concept (Text Block (HTML))	For Period		qbmi:DisclosureOfEmployeeCostsAndPurchaseOfGoodsAndServicesTextBlock
227	10401 - Disclosure - FINANCIAL EXPENSES	Network	*	*	http://www.quebecor.com/role/DisclosureFinancialExpenses
228	Implied Table	Table	*	*	implied:Table
229	FINANCIAL EXPENSES	Abstract			qbmi:FinancialExpensesAbstract
230	FINANCIAL EXPENSES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinanceCostExplanatory
231	10501 - Disclosure - RESTRUCTURING OF OPERATIONS, LITIGATION AND OTHER ITEMS	Network	*	*	http://www.quebecor.com/role/DisclosureRestructuringOfOperationsLitigationAndOtherItems
232	Implied Table	Table	*	*	implied:Table
233	RESTRUCTURING OF OPERATIONS, LITIGATION AND OTHER ITEMS	Abstract			qbmi:RestructuringOfOperationsLitigationAndOtherItemsAbstract
234	RESTRUCTURING OF OPERATIONS, LITIGATION AND OTHER ITEMS	Concept (Text Block (HTML))	For Period		qbmi:RestructuringOfOperationsLitigationAndOtherItemsTextBlock
235	10601 - Disclosure - GAIN ON SALE OF SPECTRUM LICENCES	Network	*	*	http://www.quebecor.com/role/DisclosureGainOnSaleOfSpectrumLicences
236	Implied Table	Table	*	*	implied:Table
237	GAIN ON SALE OF SPECTRUM LICENCES	Abstract			qbmi:GainOnSaleOfSpectrumLicencesAbstract
238	GAIN ON SALE OF SPECTRUM LICENCES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfIntangibleAssetsWithIndefiniteUsefulLifeExplanatory
239	10701 - Disclosure - IMPAIRMENT OF GOODWILL AND OTHER ASSETS	Network	*	*	http://www.quebecor.com/role/DisclosureImpairmentOfGoodwillAndOtherAssets
240	Implied Table	Table	*	*	implied:Table
241	IMPAIRMENT OF GOODWILL AND OTHER ASSETS	Abstract			ifrs-full:DisclosureOfImpairmentLossAndReversalOfImpairmentLossAbstract
242	IMPAIRMENT OF GOODWILL AND OTHER ASSETS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfImpairmentOfAssetsExplanatory
243	10801 - Disclosure - LOSS ON DEBT REFINANCING	Network	*	*	http://www.quebecor.com/role/DisclosureLossOnDebtRefinancing
244	Implied Table	Table	*	*	implied:Table
245	LOSS ON DEBT REFINANCING	Abstract			qbmi:LossOnDebtRefinancingAbstract
246	LOSS ON DEBT REFINANCING	Concept (Text Block (HTML))	For Period		qbmi:DisclosureOfLossOnDebtRefinancingTextBlock
247	10901 - Disclosure - INCOME TAXES	Network	*	*	http://www.quebecor.com/role/DisclosureIncomeTaxes
248	Implied Table	Table	*	*	implied:Table
249	INCOME TAXES	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
250	INCOME TAXES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfIncomeTaxExplanatory
251	11001 - Disclosure - BUSINESS ACQUISITIONS	Network	*	*	http://www.quebecor.com/role/DisclosureBusinessAcquisitions
252	Implied Table	Table	*	*	implied:Table
253	BUSINESS ACQUISITIONS	Abstract			ifrs-full:DisclosureOfBusinessCombinationsAbstract
254	BUSINESS ACQUISITIONS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfBusinessCombinationsExplanatory
255	11101 - Disclosure - ACCOUNTS RECEIVABLE	Network	*	*	http://www.quebecor.com/role/DisclosureAccountsReceivable
256	Implied Table	Table	*	*	implied:Table
257	ACCOUNTS RECEIVABLE	Abstract			ifrs-full:TradeAndOtherReceivablesAbstract
258	ACCOUNTS RECEIVABLE	Concept (Text Block (HTML))	For Period		qbmi:DisclosureOfAccountsReceivableTextBlock
259	11201 - Disclosure - INVENTORIES	Network	*	*	http://www.quebecor.com/role/DisclosureInventories
260	Implied Table	Table	*	*	implied:Table
261	INVENTORIES	Abstract			ifrs-full:ClassesOfInventoriesAbstract
262	INVENTORIES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInventoriesExplanatory
263	11301 - Disclosure - PROPERTY, PLANT AND EQUIPMENT	Network	*	*	http://www.quebecor.com/role/DisclosurePropertyPlantAndEquipment
264	Implied Table	Table	*	*	implied:Table
265	PROPERTY, PLANT AND EQUIPMENT	Abstract			ifrs-full:PropertyPlantAndEquipmentAbstract
266	PROPERTY, PLANT AND EQUIPMENT	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory
267	11401 - Disclosure - INTANGIBLE ASSETS	Network	*	*	http://www.quebecor.com/role/DisclosureIntangibleAssets
268	Implied Table	Table	*	*	implied:Table
269	INTANGIBLE ASSETS	Abstract			ifrs-full:DisclosureOfIntangibleAssetsAbstract
270	INTANGIBLE ASSETS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfIntangibleAssetsExplanatory
271	11501 - Disclosure - GOODWILL	Network	*	*	http://www.quebecor.com/role/DisclosureGoodwill
272	Implied Table	Table	*	*	implied:Table
273	GOODWILL	Abstract			ifrs-full:DisclosureOfReconciliationOfChangesInGoodwillAbstract
274	GOODWILL	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfGoodwillExplanatory
275	11601 - Disclosure - LOANS TO THE PARENT CORPORATION	Network	*	*	http://www.quebecor.com/role/DisclosureLoansToParentCorporation
276	Implied Table	Table	*	*	implied:Table
277	LOANS TO THE PARENT CORPORATION	Abstract			qbmi:LoansToParentCompanyAbstract
278	LOANS TO THE PARENT CORPORATION	Concept (Text Block (HTML))	For Period		qbmi:LoansToParentCorporationTextBlock
279	11701 - Disclosure - OTHER ASSETS	Network	*	*	http://www.quebecor.com/role/DisclosureOtherAssets
280	Implied Table	Table	*	*	implied:Table
281	OTHER ASSETS	Abstract			ifrs-full:MiscellaneousNoncurrentAssetsAbstract
282	OTHER ASSETS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOtherNoncurrentAssetsExplanatory
283	11801 - Disclosure - ACCOUNTS PAYABLE AND ACCRUED CHARGES	Network	*	*	http://www.quebecor.com/role/DisclosureAccountsPayableAndAccruedCharges
284	Implied Table	Table	*	*	implied:Table
285	ACCOUNTS PAYABLE AND ACCRUED CHARGES	Abstract			qbmi:AccountsPayableAndAccruedChargesAbstract
286	ACCOUNTS PAYABLE AND ACCRUED CHARGES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTradeAndOtherPayablesExplanatory
287	11901 - Disclosure - PROVISIONS AND CONTINGENCIES	Network	*	*	http://www.quebecor.com/role/DisclosureProvisionsAndContingencies
288	Implied Table	Table	*	*	implied:Table
289	PROVISIONS AND CONTINGENCIES	Abstract			qbmi:DisclosureOfProvisionsAndContingenciesAbstract
290	PROVISIONS AND CONTINGENCIES	Concept (Text Block (HTML))	For Period		qbmi:DisclosureOfProvisionsAndContingenciesExplanatory
291	12001 - Disclosure - LONG-TERM DEBT	Network	*	*	http://www.quebecor.com/role/DisclosureLongTermDebt
292	Implied Table	Table	*	*	implied:Table
293	LONG-TERM DEBT	Abstract			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsAbstract
294	LONG-TERM DEBT	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfBorrowingsExplanatory
295	12101 - Disclosure - OTHER LIABILITIES	Network	*	*	http://www.quebecor.com/role/DisclosureOtherLiabilities
296	Implied Table	Table	*	*	implied:Table
297	OTHER LIABILITIES	Abstract			ifrs-full:MiscellaneousNoncurrentLiabilitiesAbstract
298	OTHER LIABILITIES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOtherNoncurrentLiabilitiesExplanatory
299	12201 - Disclosure - CAPITAL STOCK	Network	*	*	http://www.quebecor.com/role/DisclosureCapitalStock
300	Implied Table	Table	*	*	implied:Table
301	CAPITAL STOCK	Abstract			ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
302	CAPITAL STOCK	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory
303	12301 - Disclosure - STOCK-BASED COMPENSATION PLANS	Network	*	*	http://www.quebecor.com/role/DisclosureStockBasedCompensationPlans
304	Implied Table	Table	*	*	implied:Table
305	STOCK-BASED COMPENSATION PLANS	Abstract			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementAbstract
306	STOCK-BASED COMPENSATION PLANS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSharebasedPaymentArrangementsExplanatory
307	12401 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS	Network	*	*	http://www.quebecor.com/role/DisclosureAccumulatedOtherComprehensiveLoss
308	Implied Table	Table	*	*	implied:Table
309	ACCUMULATED OTHER COMPREHENSIVE LOSS	Abstract			ifrs-full:DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemAbstract
310	ACCUMULATED OTHER COMPREHENSIVE LOSS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemExplanatory
311	12501 - Disclosure - COMMITMENTS	Network	*	*	http://www.quebecor.com/role/DisclosureCommitments
312	Implied Table	Table	*	*	implied:Table
313	COMMITMENTS	Abstract			qbmi:CommitmentsAbstract
314	COMMITMENTS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfCommitmentsExplanatory
315	12601 - Disclosure - GUARANTEES	Network	*	*	http://www.quebecor.com/role/DisclosureGuarantees
316	Implied Table	Table	*	*	implied:Table
317	GUARANTEES	Abstract			qbmi:DisclosureOfGuaranteesAbstract
318	GUARANTEES	Concept (Text Block (HTML))	For Period		qbmi:DisclosureOfGuaranteesTextBlock
319	12701 - Disclosure - FINANCIAL INSTRUMENTS AND FINANCIAL RISK MANAGEMENT	Network	*	*	http://www.quebecor.com/role/DisclosureFinancialInstrumentsAndFinancialRiskManagement
320	Implied Table	Table	*	*	implied:Table
321	FINANCIAL INSTRUMENTS AND FINANCIAL RISK MANAGEMENT	Abstract			ifrs-full:DisclosureOfFinancialInstrumentsAbstract
322	FINANCIAL INSTRUMENTS AND FINANCIAL RISK MANAGEMENT	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialInstrumentsExplanatory
323	12801 - Disclosure - RELATED PARTY TRANSACTIONS	Network	*	*	http://www.quebecor.com/role/DisclosureRelatedPartyTransactions
324	Implied Table	Table	*	*	implied:Table
325	RELATED PARTY TRANSACTIONS	Abstract			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesAbstract
326	RELATED PARTY TRANSACTIONS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfRelatedPartyExplanatory
327	12901 - Disclosure - PENSION PLANS AND POSTRETIREMENT BENEFITS	Network	*	*	http://www.quebecor.com/role/DisclosurePensionPlansAndPostretirementBenefits
328	Implied Table	Table	*	*	implied:Table
329	PENSION PLANS AND POSTRETIREMENT BENEFITS	Abstract			ifrs-full:DisclosureOfDefinedBenefitPlansAbstract
330	PENSION PLANS AND POSTRETIREMENT BENEFITS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDefinedBenefitPlansExplanatory
331	13001 - Disclosure - DISCONTINUED OPERATIONS	Network	*	*	http://www.quebecor.com/role/DisclosureDiscontinuedOperations
332	Implied Table	Table	*	*	implied:Table
333	DISCONTINUED OPERATIONS	Abstract			ifrs-full:NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwnersAbstract
334	DISCONTINUED OPERATIONS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfNoncurrentAssetsHeldForSaleAndDiscontinuedOperationsExplanatory
335	13101 - Disclosure - NON-CONSOLIDATED FINANCIAL STATEMENTS OF THE CORPORATION	Network	*	*	http://www.quebecor.com/role/DisclosureNonConsolidatedFinancialStatementsOfCorporation
336	Implied Table	Table	*	*	implied:Table
337	NON-CONSOLIDATED FINANCIAL STATEMENTS OF THE CORPORATION	Abstract			srt:CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract
338	NON-CONSOLIDATED FINANCIAL STATEMENTS OF THE CORPORATION	Concept (Text Block (HTML))	For Period		qbmi:IfrsCondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock
339	20102 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	Network	*	*	http://www.quebecor.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies
340	Implied Table	Table	*	*	implied:Table
341	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	Abstract			qbmi:SummaryOfSignificantAccountingPoliciesAbstract
342	Basis of presentation	Concept (Text Block (HTML))	For Period		qbmi:DescriptionOfAccountingPolicyForBasisOfPresentationPolicyTextBlock
343	Changes in accounting policies	Concept (Text Block (HTML))	For Period		qbmi:DescriptionForChangesInAccountingPoliciesPolicyTextBlock
344	Consolidation	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForSubsidiariesExplanatory
345	Business acquisition	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForBusinessCombinationsExplanatory
346	Foreign currency translation	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory
347	Revenue recognition	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForRecognitionOfRevenue
348	Impairment of assets	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfAssetsExplanatory
349	Barter transactions	Concept (Text Block (HTML))	For Period		qbmi:DescriptionOfAccountingPolicyForBarterTransactionsPolicyTextBlock
350	Income taxes	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
351	Leases	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory
352	Financial instruments	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory
353	Financing fees	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForFinanceCostsExplanatory
354	Tax credits and government assistance	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForGovernmentGrants
355	Cash and cash equivalents	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents
356	Accounts receivable and contract assets	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForTradeAndOtherReceivablesExplanatory
357	Inventories	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForMeasuringInventories
358	Long-term investments	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForInvestmentPropertyExplanatory
359	Property, plant and equipment	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
360	Goodwill and intangible assets	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory
361	Contract costs	Concept (Text Block (HTML))	For Period		qbmi:DescriptionOfAccountingPolicyForContractCostsPolicyTextBlock
362	Provisions	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory
363	Stock-based compensation	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory
364	Pension plans and postretirement benefits	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory
365	Use of estimates and judgments	Concept (Text Block (HTML))	For Period		qbmi:DescriptionOfAccountingPolicyForUseOfEstimatesAndJudgmentsPolicyTextBlock
366	Recent accounting pronouncements	Concept (Text Block (HTML))	For Period		qbmi:DescriptionOfAccountingPolicyForRecentAccountingPronouncementsPolicyTextBlock
367	30001 - Disclosure - SEGMENTED INFORMATION (Tables)	Network	*	*	http://www.quebecor.com/role/DisclosureSegmentedInformationTables
368	Implied Table	Table	*	*	implied:Table
369	SEGMENTED INFORMATION	Abstract			ifrs-full:DisclosureOfOperatingSegmentsAbstract
370	Schedule of major subsidiaries	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory
371	Schedule of segmented information	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOperatingSegmentsExplanatory
372	30103 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	Network	*	*	http://www.quebecor.com/role/DisclosureSummaryOfSignificantAccountingPoliciesTables
373	Implied Table	Table	*	*	implied:Table
374	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	Abstract			qbmi:SummaryOfSignificantAccountingPoliciesAbstract
375	Schedule of impacts on consolidated financial figures by retroactive adoption of IFRS 15	Concept (Text Block (HTML))	For Period		qbmi:ImpactOnConsolidatedFinancialFiguresByRetroactiveAdoptionOfIfrs15TableTextBlock
376	Schedule of property, plant and equipment useful lives	Concept (Text Block (HTML))	For Period		qbmi:DisclosureOfUsefulLifeOfPropertyPlantAndEquipmentTableTextBlock
377	Schedule of useful lives of intangible assets using the straight-line method	Concept (Text Block (HTML))	For Period		qbmi:DisclosureOfUsefulLifeOfIntangibleAssetsTableTextBlock
378	Schedule of impacts on consolidated financial figures by retroactive adoption of IFRS 16	Concept (Text Block (HTML))	For Period		qbmi:ImpactOnConsolidatedFinancialFiguresByRetroactiveAdoptionOfIfrs16TableTextBlock
379	30203 - Disclosure - REVENUES (Tables)	Network	*	*	http://www.quebecor.com/role/DisclosureRevenuesTables
380	Implied Table	Table	*	*	implied:Table
381	REVENUES	Abstract			ifrs-full:RevenueAbstract
382	Schedule of revenues	Concept (Text Block (HTML))	For Period		qbmi:DisclosureOfRevenueFromServicesRenderedAndProductSalesTableTextBlock
383	30303 - Disclosure - EMPLOYEE COSTS AND PURCHASE OF GOODS AND SERVICES (Tables)	Network	*	*	http://www.quebecor.com/role/DisclosureEmployeeCostsAndPurchaseOfGoodsAndServicesTables
384	Implied Table	Table	*	*	implied:Table
385	EMPLOYEE COSTS AND PURCHASE OF GOODS AND SERVICES	Abstract			qbmi:EmployeeCostsAndPurchaseOfGoodsAndServicesAbstract
386	Schedule of employee costs and purchase of goods and services	Concept (Text Block (HTML))	For Period		qbmi:DisclosureOfEmployeeCostsAndPurchaseOfGoodsAndServicesTableTextBlock
387	30403 - Disclosure - FINANCIAL EXPENSES (Tables)	Network	*	*	http://www.quebecor.com/role/DisclosureFinancialExpensesTables
388	Implied Table	Table	*	*	implied:Table
389	FINANCIAL EXPENSES	Abstract			qbmi:FinancialExpensesAbstract
390	Schedule of financial expenses	Concept (Text Block (HTML))	For Period		qbmi:DisclosureOfFinancialExpensesTableTextBlock
391	30703 - Disclosure - IMPAIRMENT OF GOODWILL AND OTHER ASSETS (Tables)	Network	*	*	http://www.quebecor.com/role/DisclosureImpairmentOfGoodwillAndOtherAssetsTables
392	Implied Table	Table	*	*	implied:Table
393	IMPAIRMENT OF GOODWILL AND OTHER ASSETS	Abstract			ifrs-full:DisclosureOfImpairmentLossAndReversalOfImpairmentLossAbstract
394	Schedule of impairment of goodwill and other assets	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfImpairmentLossAndReversalOfImpairmentLossExplanatory
395	30903 - Disclosure - INCOME TAXES (Tables)	Network	*	*	http://www.quebecor.com/role/DisclosureIncomeTaxesTables
396	Implied Table	Table	*	*	implied:Table
397	INCOME TAXES	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
398	Summary of income tax reconciliation	Concept (Text Block (HTML))	For Period		qbmi:IFRSScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock
399	Summary of components of net deferred income tax liability and their impact on the deferred income tax expense	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsExplanatory
400	Summary of changes in the net deferred income tax liability	Concept (Text Block (HTML))	For Period		qbmi:DisclosureOfChangesInNetDeferredIncomeTaxLiabilityTableTextBlock
401	31003 - Disclosure - BUSINESS ACQUISITIONS (Tables)	Network	*	*	http://www.quebecor.com/role/DisclosureBusinessAcquisitionsTables
402	Implied Table	Table	*	*	implied:Table
403	NON-CONTROLLING INTERESTS AND BUSINESS ACQUISITIONS	Abstract			qbmi:NonControllingInterestsAndBusinessAcquisitionsAbstract
404	Schedule of purchase price allocation between the fair value of identifiable assets and liabilities	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutBusinessCombinationsExplanatory
405	31103 - Disclosure - ACCOUNTS RECEIVABLE (Tables)	Network	*	*	http://www.quebecor.com/role/DisclosureAccountsReceivableTables
406	Implied Table	Table	*	*	implied:Table
407	ACCOUNTS RECEIVABLE	Abstract			ifrs-full:TradeAndOtherReceivablesAbstract
408	Schedule of accounts receivable	Concept (Text Block (HTML))	For Period		qbmi:DisclosureOfInformationAboutAccountsReceivableTableTextBlock
409	31203 - Disclosure - INVENTORIES (Tables)	Network	*	*	http://www.quebecor.com/role/DisclosureInventoriesTables
410	Implied Table	Table	*	*	implied:Table
411	INVENTORIES	Abstract			ifrs-full:ClassesOfInventoriesAbstract
412	Schedule of inventories	Concept (Text Block (HTML))	For Period		qbmi:DisclosureOfInventoriesTableTextBlock
413	31303 - Disclosure - PROPERTY, PLANT AND EQUIPMENT (Tables)	Network	*	*	http://www.quebecor.com/role/DisclosurePropertyPlantAndEquipmentTables
414	Implied Table	Table	*	*	implied:Table
415	PROPERTY, PLANT AND EQUIPMENT	Abstract			ifrs-full:PropertyPlantAndEquipmentAbstract
416	Schedule of changes in the net carrying amount of property, plant and equipment	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
417	31403 - Disclosure - INTANGIBLE ASSETS (Tables)	Network	*	*	http://www.quebecor.com/role/DisclosureIntangibleAssetsTables
418	Implied Table	Table	*	*	implied:Table
419	INTANGIBLE ASSETS	Abstract			ifrs-full:DisclosureOfIntangibleAssetsAbstract
420	Schedule of changes in the net carrying amount of intangible assets	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutIntangibleAssetsExplanatory
421	31503 - Disclosure - GOODWILL (Tables)	Network	*	*	http://www.quebecor.com/role/DisclosureGoodwillTables
422	Implied Table	Table	*	*	implied:Table
423	GOODWILL	Abstract			ifrs-full:DisclosureOfReconciliationOfChangesInGoodwillAbstract
424	Schedule of changes in the net carrying amount of goodwill	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfReconciliationOfChangesInGoodwillExplanatory
425	Schedule of allocation of net carrying amount of goodwill in significant CGU groups	Concept (Text Block (HTML))	For Period		qbmi:DisclosureOfAllocationOfNetCarryingAmountOfGoodwillToCguGroupsTableTextBlock
426	Schedule of determination of recoverable amounts in the impairment tests performed in significant CGU groups	Concept (Text Block (HTML))	For Period		qbmi:DisclosureOfRecoverableAmountsTableTextBlock
427	31703 - Disclosure - OTHER ASSETS (Tables)	Network	*	*	http://www.quebecor.com/role/DisclosureOtherAssetsTables
428	Implied Table	Table	*	*	implied:Table
429	OTHER ASSETS	Abstract			ifrs-full:MiscellaneousNoncurrentAssetsAbstract
430	Schedule of other assets	Concept (Text Block (HTML))	For Period		qbmi:DisclosureOfOtherAssetsNoncurrentExplanatory
431	31803 - Disclosure - ACCOUNTS PAYABLE AND ACCRUED CHARGES (Tables)	Network	*	*	http://www.quebecor.com/role/DisclosureAccountsPayableAndAccruedChargesTables
432	Implied Table	Table	*	*	implied:Table
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434	Schedule of accounts payable and accrued charges	Concept (Text Block (HTML))	For Period		qbmi:AccountsPayableAndAccruedChargesTableTextBlock
435	31903 - Disclosure - PROVISIONS AND CONTINGENCIES (Tables)	Network	*	*	http://www.quebecor.com/role/DisclosureProvisionsAndContingenciesTables
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438	Summary of provisions	Concept (Text Block (HTML))	For Period		qbmi:DisclosureOfDetailedInformationAboutProvisionsExplanatory
439	32003 - Disclosure - LONG-TERM DEBT (Tables)	Network	*	*	http://www.quebecor.com/role/DisclosureLongTermDebtTables
440	Implied Table	Table	*	*	implied:Table
441	LONG-TERM DEBT	Abstract			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsAbstract
442	Schedule of long-term debt	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsExplanatory
443	Schedule of principal repayments of long-term debt	Concept (Text Block (HTML))	For Period		ifrs-full:MaturityAnalysisForNonderivativeFinancialLiabilities
444	32103 - Disclosure - OTHER LIABILITIES (Tables)	Network	*	*	http://www.quebecor.com/role/DisclosureOtherLiabilitiesTables
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446	OTHER LIABILITIES	Abstract			ifrs-full:MiscellaneousNoncurrentLiabilitiesAbstract
447	Schedule of other liabilities	Concept (Text Block (HTML))	For Period		qbmi:DisclosureOfOtherLiabilitiesTableTextBlock
448	32203 - Disclosure - CAPITAL STOCK (Tables)	Network	*	*	http://www.quebecor.com/role/DisclosureCapitalStockTables
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450	CAPITAL STOCK	Abstract			ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
451	Summary of issued and outstanding capital stock	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfClassesOfShareCapitalExplanatory
452	32303 - Disclosure - STOCK-BASED COMPENSATION PLANS (Tables)	Network	*	*	http://www.quebecor.com/role/DisclosureStockBasedCompensationPlansTables
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689	Loss (gain) on foreign currency translation on short-term monetary items	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
690	Interest from the parent corporation	Concept (Monetary)	For Period	Credit	qbmi:InterestFromParentCorporation
691	Other	Concept (Monetary)	For Period	Credit	ifrs-full:OtherFinanceIncomeCost
692	Total financial expenses	Concept (Monetary)	For Period	Debit	ifrs-full:FinanceCosts
693	40501 - Disclosure - RESTRUCTURING OF OPERATIONS, LITIGATION AND OTHER ITEMS (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureRestructuringOfOperationsLitigationAndOtherItemsDetails
694	Implied Table	Table	*	*	implied:Table
695	RESTRUCTURING OF OPERATIONS, LITIGATION AND OTHER ITEMS	Abstract			qbmi:RestructuringOfOperationsLitigationAndOtherItemsAbstract
696	Restructuring of operations	Concept (Monetary)	For Period	Credit	qbmi:IncomeExpenseFromRestructuringOfOperations
697	Restructuring of operations, litigation and other items	Concept (Monetary)	For Period	Credit	qbmi:IncomeExpenseFromRestructuringLitigationAndOtherItems
698	Impairment charge on assets	Concept (Monetary)	For Period	Debit	qbmi:IfrsAssetImpairmentCharges
699	40601 - Disclosure - GAIN ON SALE OF SPECTRUM LICENCES (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureGainOnSaleOfSpectrumLicencesDetails
700	Disclosure of intangible assets with indefinite useful life [table]	Table	*	*	ifrs-full:DisclosureOfIntangibleAssetsWithIndefiniteUsefulLifeTable
701	Intangible assets with indefinite useful life [axis]	Axis			ifrs-full:IntangibleAssetsWithIndefiniteUsefulLifeAxis
702	Intangible assets with indefinite useful life [member]	Member			ifrs-full:IntangibleAssetsWithIndefiniteUsefulLifeMember
703	Spectrum licence	Member			ifrs-full:LicencesMember
704	AWS spectrum licence	Member			qbmi:AdvancedWirelessServicesSpectrumLicenseMember
705	2500 MHz and 700 MHz wireless spectrum licences	Member			qbmi:WirelessSpectrumLicencesFrequencyBand2500MhzAnd700MhzMember
706	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
707	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
708	Videotron	Member			qbmi:VideotronLtdMember
709	GAIN ON SALE OF SPECTRUM LICENCES	LineItems			ifrs-full:DisclosureOfIntangibleAssetsWithIndefiniteUsefulLifeLineItems
710	Cash consideration	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromSalesOfIntangibleAssetsClassifiedAsInvestingActivities
711	Gain on sale of spectrum licences	Concept (Monetary)	For Period	Credit	qbmi:GainLossOnSaleOfIntangibleAssetsWithIndefiniteUsefulLives
712	Number of intangible assets sold	Concept (Integer)	For Period		qbmi:NumberOfIntangibleAssetsSold
713	Income taxes (recovery)	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
714	40701 - Disclosure - IMPAIRMENT OF GOODWILL AND OTHER ASSETS - Tabular disclosure (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureImpairmentOfGoodwillAndOtherAssetsTabularDisclosureDetails
715	Implied Table	Table	*	*	implied:Table
716	IMPAIRMENT OF GOODWILL AND OTHER ASSETS	Abstract			ifrs-full:DisclosureOfImpairmentLossAndReversalOfImpairmentLossAbstract
717	Impairment of goodwill	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossGoodwill
718	Impairment of intangible assets	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill
719	Total impairment loss	Concept (Monetary)	For Period	Debit	ifrs-full:ImpairmentLoss
720	40702 - Disclosure - IMPAIRMENT OF GOODWILL AND OTHER ASSETS - Additional information (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureImpairmentOfGoodwillAndOtherAssetsAdditionalInformationDetails
721	Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [table]	Table	*	*	ifrs-full:DisclosureOfInformationForEachMaterialImpairmentLossRecognisedOrReversedForIndividualAssetOrCashgeneratingUnitTable
722	Individual assets or cash-generating units [axis]	Axis			ifrs-full:IndividualAssetsOrCashgeneratingUnitsAxis
723	Entity's total for individual assets or cash-generating units [member]	Member			ifrs-full:EntitysTotalForIndividualAssetsOrCashgeneratingUnitsMember
724	Magazines CGU	Member			qbmi:MagazinesCGUMember
725	Other segments excluding Magazines CGU	Member			qbmi:OtherSegmentsExcludingMagazinesCGUMember
726	IMPAIRMENT OF GOODWILL AND OTHER ASSETS	LineItems			ifrs-full:DisclosureOfInformationForEachMaterialImpairmentLossRecognisedOrReversedForIndividualAssetOrCashgeneratingUnitLineItems
727	Impairment of goodwill	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossGoodwill
728	Impairment of goodwill without tax consequence	Concept (Monetary)	For Period	Debit	qbmi:ImpairmentLossRecognisedInProfitOrLossGoodwillWithoutTaxConsequence
729	Impairment of intangible assets	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill
730	Impairment of intangible assets without tax consequence	Concept (Monetary)	For Period	Debit	qbmi:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwillWithoutTaxConsequence
731	40801 - Disclosure - LOSS ON DEBT REFINANCING (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureLossOnDebtRefinancingDetails
732	Disclosure of detailed information about borrowings [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
733	Consolidated Entities [Axis]	Axis			srt:ConsolidatedEntitiesAxis
734	Consolidated Entities [Domain]	Member			srt:ConsolidatedEntitiesDomain
735	Parent Company	Member			srt:ParentCompanyMember
736	Subsidiaries	Member			srt:SubsidiariesMember
737	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
738	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
739	Videotron	Member			qbmi:VideotronLtdMember
740	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
741	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
742	Senior Notes	Member			qbmi:IfrsSeniorNotesMember
743	6.875% Senior Notes	Member			qbmi:SeniorNotes6.875PercentageMember
744	7.375% Senior Notes	Member			qbmi:SeniorNotes7.375PercentageMember
745	Long-term debt	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
746	Principal amount	Concept (Monetary)	As Of		ifrs-full:NotionalAmount
747	Interest rate (as a percent)	Concept (Percent)	As Of		ifrs-full:BorrowingsInterestRate
748	Redeemed for cash consideration	Concept (Monetary)	For Period	Credit	ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
749	Loss on debt refinancing	Concept (Monetary)	For Period	Credit	qbmi:GainLossOnDebtRefinancing
750	40901 - Disclosure - INCOME TAXES - Reconciliation of income tax expense (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureIncomeTaxesReconciliationOfIncomeTaxExpenseDetails
751	Implied Table	Table	*	*	implied:Table
752	INCOME TAXES	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
753	Domestic statutory tax rate (in percent)	Concept (Percent)	For Period		ifrs-full:ApplicableTaxRate
754	Income taxes at domestic statutory tax rate	Concept (Monetary)	For Period	Debit	ifrs-full:TaxExpenseIncomeAtApplicableTaxRate
755	(Reduction) increase resulting from:	Abstract			qbmi:IncreaseDecreaseInIncomeTaxExpenseAtApplicableTaxRateAbstract
756	Effect of non-deductible charges, non-taxable income and differences between current and future tax rates	Concept (Monetary)	For Period	Debit	qbmi:TaxEffectOfExpenseNotDeductibleRevenueExemptFromTaxationAndDifferencesBetweenCurrentAndFutureTaxRatesInDeterminingTaxableProfitTaxLoss
757	Change in benefit arising from the recognition of current and prior year tax losses (note 6 and 30)	Concept (Monetary)	For Period	Debit	ifrs-full:TaxEffectOfTaxLosses
758	Non-deductible impairment of goodwill	Concept (Monetary)	For Period	Debit	ifrs-full:TaxEffectOfImpairmentOfGoodwill
759	Change in deferred tax balances due to a change in substantively enacted tax rates	Concept (Monetary)	For Period	Debit	ifrs-full:TaxEffectFromChangeInTaxRate
760	Effect of tax consolidation transactions with the parent corporation	Concept (Monetary)	For Period	Debit	qbmi:TaxEffectOfTaxConsolidationTransactionsWithParent
761	Other	Concept (Monetary)	For Period	Debit	ifrs-full:OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome
762	Income taxes	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
763	40902 - Disclosure - INCOME TAXES - Components of deferred income tax (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureIncomeTaxesComponentsOfDeferredIncomeTaxDetails
764	Disclosure of temporary difference, unused tax losses and unused tax credits [table]	Table	*	*	ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
765	Temporary difference, unused tax losses and unused tax credits [axis]	Axis			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
766	Temporary difference, unused tax losses and unused tax credits [member]	Member			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
767	Loss carryforwards	Member			ifrs-full:UnusedTaxLossesMember
768	Accounts payable, accrued charges, provisions and deferred revenue	Member			qbmi:AccountsPayableAccruedChargesProvisionsAndDeferredRevenueMember
769	Defined benefit plans	Member			ifrs-full:DefinedBenefitPlansMember
770	Contract assets	Member			ifrs-full:ContractAssetsMember
771	Property, plant and equipment	Member			ifrs-full:PropertyPlantAndEquipmentMember
772	Goodwill, intangible assets and other assets	Member			ifrs-full:IntangibleAssetsAndGoodwillMember
773	Long-term debt and derivative financial instruments	Member			qbmi:LongTermDebtAndDerivativeFinancialInstrumentsMember
774	Benefits from a general partnership	Member			qbmi:BenefitsFromGeneralPartnershipMember
775	Other	Member			ifrs-full:OtherTemporaryDifferencesMember
776	Deferred income taxes	LineItems			ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
777	Deferred tax liability, net	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilityAsset
778	Deferred tax expense (income)	Concept (Monetary)	For Period	Debit	ifrs-full:DeferredTaxExpenseIncome
779	40903 - Disclosure - INCOME TAXES - Changes in deferred income tax liability (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureIncomeTaxesChangesInDeferredIncomeTaxLiabilityDetails
780	Implied Table	Table	*	*	implied:Table
781	INCOME TAXES	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
782	Changes in the net deferred income tax liability	Abstract			ifrs-full:ReconciliationOfChangesInDeferredTaxLiabilityAssetAbstract
783	Balance at beginning of year	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilityAsset
784	Recognized in income as continuing operations	Concept (Monetary)	For Period		ifrs-full:DeferredTaxExpenseIncomeRecognisedInProfitOrLoss
785	Recognized in other comprehensive income	Concept (Monetary)	For Period		ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome
786	Acquisition of tax deductions	Concept (Monetary)	For Period	Debit	qbmi:AcquisitionOfTaxDeductions
787	Other	Concept (Monetary)	For Period	Credit	qbmi:IncreaseDecreaseInDeferredTaxLiabilityOther
788	Balance at end of year	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilityAsset
789	40904 - Disclosure - INCOME TAXES - Net deferred income tax liability (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureIncomeTaxesNetDeferredIncomeTaxLiabilityDetails
790	Implied Table	Table	*	*	implied:Table
791	INCOME TAXES	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
792	Deferred income tax asset	Concept (Monetary)	As Of	Debit	ifrs-full:DeferredTaxAssets
793	Deferred income tax liability	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilities
794	Net deferred income tax liability	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilityAsset
795	40905 - Disclosure - INCOME TAXES - Additional information (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureIncomeTaxesAdditionalInformationDetails
796	Implied Table	Table	*	*	implied:Table
797	INCOME TAXES	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
798	Loss carryforwards for income tax purposes available to reduce future taxable income	Concept (Monetary)	For Period	Credit	ifrs-full:TaxBenefitArisingFromPreviouslyUnrecognisedTaxLossTaxCreditOrTemporaryDifferenceOfPriorPeriodUsedToReduceDeferredTaxExpense
799	Capital losses that can be carried forward indefinitely and applied only against future capital gains	Concept (Monetary)	As Of		ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
800	Capital gain recognized during the period	Concept (Monetary)	For Period	Credit	qbmi:CapitalGainRecognizedDuringPeriod
801	Income tax consequences attached to the payment of dividends or distributions	Concept (Monetary)	For Period		ifrs-full:IncomeTaxConsequencesOfDividendsProposedOrDeclaredBeforeFinancialStatementsAuthorisedForIssueNotRecognisedAsLiability
802	41001 - Disclosure - BUSINESS ACQUISITIONS - Business acquisitions (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureBusinessAcquisitionsBusinessAcquisitionsDetails
803	Disclosure of detailed information about business combination [table]	Table	*	*	ifrs-full:DisclosureOfBusinessCombinationsTable
804	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
805	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
806	2018 Acquisition	Member			qbmi:Acquisitions2018Member
807	2017 Acquisition	Member			qbmi:Acquisitions2017Member
808	2016 Acquisition	Member			qbmi:Acquisitions2016Member
809	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
810	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
811	Videotron	Member			qbmi:VideotronLtdMember
812	Segments [axis]	Axis			ifrs-full:SegmentsAxis
813	Segments [member]	Member			ifrs-full:SegmentsMember
814	Sports and Entertainment	Member			qbmi:SportsAndEntertainmentSegmentMember
815	Business acquisitions	LineItems			ifrs-full:DisclosureOfBusinessCombinationsLineItems
816	Purchase price	Concept (Monetary)	As Of	Credit	ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred
817	Amount paid, net of cash acquired	Concept (Monetary)	As Of	Credit	ifrs-full:CashTransferred
818	Cash	Concept (Monetary)	For Period	Debit	qbmi:IfrsCashAcquiredFromAcquisition
819	Post-closing adjustment	Concept (Monetary)	As Of	Debit	qbmi:PostClosingAdjustmentPaidReceived
820	Balance consideration paid, prior acquisitions	Concept (Monetary)	For Period	Credit	qbmi:IfrsPaymentsForPreviousAcquisitions
821	Business acquisitions	Concept (Monetary)	For Period	Credit	ifrs-full:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
822	Interest paid on balance payable	Concept (Monetary)	For Period	Credit	qbmi:BusinessCombinationInterestPaidOnBalancePayable
823	41002 - Disclosure - BUSINESS ACQUISITIONS - Purchase price allocation (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureBusinessAcquisitionsPurchasePriceAllocationDetails
824	Disclosure of detailed information about business combination [table]	Table	*	*	ifrs-full:DisclosureOfBusinessCombinationsTable
825	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
826	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
827	Business acquisitions	Member			ifrs-full:BusinessCombinationsMember
828	Disclosure of detailed information about business combination [line items]	LineItems			ifrs-full:DisclosureOfBusinessCombinationsLineItems
829	Assets acquired and Liability assumed	Abstract			ifrs-full:AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract
830	Non-cash current assets	Concept (Monetary)	As Of	Debit	qbmi:NonCashCurrentAssetsRecognisedAsOfAcquisitionDate
831	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate
832	Intangible assets	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate
833	Goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:GoodwillRecognisedAsOfAcquisitionDate
834	Total assets acquired	Concept (Monetary)	As Of	Debit	qbmi:IdentifiableAssetsAcquired
835	Non-cash current liabilities	Concept (Monetary)	As Of	Credit	qbmi:NonCashCurrentLiabilitiesRecognisedAsOfAcquisitionDate
836	Deferred income taxes	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilitiesRecognisedAsOfAcquisitionDate
837	Other long-term liabilities	Concept (Monetary)	As Of	Credit	qbmi:OtherLongTermLiabilitiesRecognisedAsOfAcquisitionDate
838	Total liabilities assumed	Concept (Monetary)	As Of	Credit	qbmi:IdentifiableLiabilitiesAssumed
839	Net assets acquired at fair value	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableAssetsAcquiredLiabilitiesAssumed
840	Consideration	Abstract			ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferredAbstract
841	Cash, net of cash acquired	Concept (Monetary)	As Of	Credit	ifrs-full:CashTransferred
842	Balance payable	Concept (Monetary)	As Of	Credit	qbmi:BalanceConsiderationPayable
843	Total consideration transferred, acquisition-date fair value	Concept (Monetary)	As Of	Credit	ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred
844	Goodwill deductible for tax purposes	Concept (Monetary)	As Of	Debit	ifrs-full:GoodwillExpectedDeductibleForTaxPurposes
845	41101 - Disclosure - ACCOUNTS RECEIVABLE - Tabular disclosure (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureAccountsReceivableTabularDisclosureDetails
846	Implied Table	Table	*	*	implied:Table
847	ACCOUNTS RECEIVABLE	Abstract			ifrs-full:TradeAndOtherReceivablesAbstract
848	Accounts receivable	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTradeReceivables
849	Other	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentReceivables
850	Total	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherCurrentReceivables
851	41102 - Disclosure - ACCOUNTS RECEIVABLE - Additional information (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureAccountsReceivableAdditionalInformationDetails
852	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
853	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
854	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
855	Parent	Member			ifrs-full:ParentMember
856	Disclosure of transactions between related parties [line items]	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
857	Current interest receivable	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentInterestReceivable
858	41201 - Disclosure - INVENTORIES (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureInventoriesDetails
859	Implied Table	Table	*	*	implied:Table
860	INVENTORIES	Abstract			ifrs-full:ClassesOfInventoriesAbstract
861	Finished goods	Concept (Monetary)	As Of	Debit	ifrs-full:FinishedGoods
862	Programs, broadcast and distribution rights	Concept (Monetary)	As Of	Debit	qbmi:ProgramsBroadcastAndDistributionRightsCurrent
863	Raw materials and supplies	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentRawMaterialsAndCurrentProductionSupplies
864	Total current inventories	Concept (Monetary)	As Of	Debit	ifrs-full:Inventories
865	Cost of inventories included in purchase of goods and services	Concept (Monetary)	For Period	Debit	ifrs-full:CostOfInventoriesRecognisedAsExpenseDuringPeriod
866	Write-downs of inventories	Concept (Monetary)	For Period		ifrs-full:InventoryWritedown2011
867	41301 - Disclosure - PROPERTY, PLANT AND EQUIPMENT (Details)	Network	*	*	http://www.quebecor.com/role/DisclosurePropertyPlantAndEquipmentDetails
868	Disclosure of detailed information about property, plant and equipment [table]	Table	*	*	ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
869	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
870	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
871	Cost	Member			ifrs-full:GrossCarryingAmountMember
872	Accumulated depreciation and impairment losses	Member			ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember
873	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
874	Property, plant and equipment	Member			ifrs-full:PropertyPlantAndEquipmentMember
875	Land, buildings and leasehold improvements	Member			qbmi:LandBuildingsAndLeaseholdImprovementsMember
876	Machinery and equipment	Member			qbmi:IfrsMachineryAndEquipmentMember
877	Telecommunication networks	Member			ifrs-full:CommunicationAndNetworkEquipmentMember
878	Telecommunication networks, component	Member			qbmi:CommunicationAndNetworkEquipmentComponentMember
879	Projects under development	Member			qbmi:ProjectsUnderDevelopmentMember
880	Disclosure of detailed information about property, plant and equipment [line items]	LineItems			ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
881	Changes in the net carrying amount of property, plant and equipment	Abstract			ifrs-full:ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract
882	Balance at the beginning of the year	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
883	Additions	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
884	Net change in additions financed with accounts payable	Concept (Monetary)	For Period	Debit	qbmi:IncreaseDecreaseThroughNetChangeInAdditionsFinancedWithAccountsPayable
885	Reclassification	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment
886	Reclassification to assets held for sale	Concept (Monetary)	For Period	Credit	ifrs-full:DecreaseThroughClassifiedAsHeldForSalePropertyPlantAndEquipment
887	Depreciation	Concept (Monetary)	For Period		ifrs-full:DepreciationPropertyPlantAndEquipment
888	Retirement, disposals and other	Concept (Monetary)	For Period	Credit	qbmi:DisposalsRetirementsAndOtherPropertyPlantAndEquipment
889	Balance at the end of the year	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
890	Estimated useful life of fixed assets	Concept (Text/String)	For Period		ifrs-full:UsefulLivesOrDepreciationRatesPropertyPlantAndEquipment
891	Increase in depreciation	Concept (Monetary)	For Period	Debit	qbmi:DepreciationPropertyPlantAndEquipmentChangeInUsefulLifeIncreaseDecrease
892	41401 - Disclosure - INTANGIBLE ASSETS - Changes in the net carrying amount of intangible assets (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureIntangibleAssetsChangesInNetCarryingAmountOfIntangibleAssetsDetails
893	Disclosure of detailed information about intangible assets [table]	Table	*	*	ifrs-full:DisclosureOfIntangibleAssetsTable
894	Classes of intangible assets other than goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
895	Intangible assets other than goodwill [member]	Member			ifrs-full:IntangibleAssetsOtherThanGoodwillMember
896	Spectrum licence	Member			ifrs-full:LicencesMember
897	Software	Member			ifrs-full:ComputerSoftwareMember
898	Customer relationships, naming rights and other	Member			qbmi:CustomerRelationshipsNamingRightsAndOtherMember
899	Broadcasting licences, trademarks and sport franchises	Member			qbmi:BroadcastingLicencesTrademarksAndSportFranchisesMember
900	Projects under development	Member			ifrs-full:IntangibleAssetsUnderDevelopmentMember
901	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
902	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
903	Cost	Member			ifrs-full:GrossCarryingAmountMember
904	Accumulated depreciation and impairment losses	Member			ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember
905	Disclosure of detailed information about intangible assets [line items]	LineItems			ifrs-full:DisclosureOfIntangibleAssetsLineItems
906	Changes in the net carrying amount of intangible assets	Abstract			ifrs-full:ReconciliationOfChangesInIntangibleAssetsOtherThanGoodwillAbstract
907	Balance at the beginning of the period	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsOtherThanGoodwill
908	Additions	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
909	Net change in additions financed with accounts payable	Concept (Monetary)	For Period	Debit	qbmi:IncreaseDecreaseThroughNetChangeInAdditionsFinancedWithAccountsPayableIntangibleAssetsOtherThanGoodwill
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911	Reclassification to assets held for sale	Concept (Monetary)	For Period	Credit	ifrs-full:DecreaseThroughClassifiedAsHeldForSaleIntangibleAssetsOtherThanGoodwill
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1151	Disclosure of classes of share capital [line items]	LineItems			ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1152	Issued and outstanding capital stock	Abstract			ifrs-full:ReconciliationOfNumberOfSharesOutstandingAbstract
1153	Balance at beginning of the year	Concept (Monetary)	As Of	Credit	ifrs-full:IssuedCapital
1154	Balance at beginning of the year (in shares)	Concept (Shares)	As Of		ifrs-full:NumberOfSharesOutstanding
1155	Reduction of paid-up capital	Concept (Monetary)	For Period	Debit	ifrs-full:ReductionOfIssuedCapital
1156	Redemption	Concept (Monetary)	For Period	Debit	ifrs-full:PurchaseOfTreasuryShares
1157	Redemption (in shares)	Concept (Shares)	For Period		qbmi:NumberOfSharesRepurchasedDuringPeriod
1158	Balance at end of the year	Concept (Monetary)	As Of	Credit	ifrs-full:IssuedCapital
1159	Balance at end of the year (in shares)	Concept (Shares)	As Of		ifrs-full:NumberOfSharesOutstanding
1160	Aggregate purchase price of shares repurchased	Concept (Monetary)	For Period	Credit	ifrs-full:PaymentsToAcquireOrRedeemEntitysShares
1161	Security paid	Concept (Monetary)	For Period	Credit	qbmi:PaymentOfSecurity
1162	Excess of purchase price over common shares repurchased	Concept (Monetary)	As Of	Credit	qbmi:ExcessOfPurchasePriceOverCommonSharesRepurchased
1163	42301 - Disclosure - STOCK-BASED COMPENSATION PLANS - Quebecor stock option plan (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureStockBasedCompensationPlansQuebecorStockOptionPlanDetails
1164	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1165	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1166	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
1167	Quebecor Stock option plan	Member			qbmi:QuebecorStockOptionPlanMember
1168	Classes of ordinary shares [axis]	Axis			ifrs-full:ClassesOfOrdinarySharesAxis
1169	Ordinary shares	Member			ifrs-full:OrdinarySharesMember
1170	Class B	Member			qbmi:OrdinarySharesClassBMember
1171	Vesting period [axis]	Axis			qbmi:VestingPeriodAxis
1172	Vesting period [domain]	Member			qbmi:VestingPeriodDomain
1173	One year	Member			qbmi:OneYearVestingPeriodMember
1174	Two years	Member			qbmi:TwoYearVestingPeriodMember
1175	Three years	Member			qbmi:ThreeYearVestingPeriodMember
1176	STOCK-BASED COMPENSATION PLANS	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1177	Number of shares authorized to issue under stock-based compensation plans	Concept (Shares)	As Of		qbmi:IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
1178	Exercisable period	Concept (xbrli:durationItemType)	For Period		qbmi:ContractualLifeOfShareBasedAwards
1179	Percentage of stock options vested	Concept (Percent)	For Period		qbmi:PercentageOfStockOptionsVestedUnderStockOptionPlan
1180	Vesting period of share based awards (in years)	Concept (xbrli:durationItemType)	For Period		qbmi:VestingLifeOfShareBasedAwards
1181	42302 - Disclosure - STOCK-BASED COMPENSATION PLANS - Quebecor outstanding and exercise price range of options (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureStockBasedCompensationPlansQuebecorOutstandingAndExercisePriceRangeOfOptionsDetails
1182	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1183	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1184	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
1185	Quebecor Stock option plan	Member			qbmi:QuebecorStockOptionPlanMember
1186	STOCK-BASED COMPENSATION PLANS	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1187	Balance at beginning of year	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
1188	Granted	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
1189	Exercised	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
1190	Cancelled	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement
1191	Balance at end of year	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
1192	Vested options at end of year	Concept (Decimal)	As Of		ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
1193	Balance at beginning of year	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
1194	Granted	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement
1195	Exercised	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement
1196	Cancelled	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement
1197	Balance at end of year	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
1198	Vested options at end of year	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement
1199	Cash consideration on stock options exercised	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromExerciseOfOptions
1200	42303 - Disclosure - STOCK-BASED COMPENSATION PLANS - Quebecor stock option plan price range of options (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureStockBasedCompensationPlansQuebecorStockOptionPlanPriceRangeOfOptionsDetails
1201	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1202	Ranges of exercise prices for outstanding share options [axis]	Axis			ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsAxis
1203	Ranges of exercise prices for outstanding share options [member]	Member			ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsMember
1204	$11.11 to 15.12	Member			qbmi:ExercisePriceRangeFromDollar11.11ToDollar15.12Member
1205	$26.52	Member			qbmi:ExercisePriceRangeDollar26.52Member
1206	Range [axis]	Axis			ifrs-full:RangeAxis
1207	Ranges [member]	Member			ifrs-full:RangesMember
1208	Minimum	Member			ifrs-full:BottomOfRangeMember
1209	Maximum	Member			ifrs-full:TopOfRangeMember
1210	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1211	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
1212	Quebecor Stock option plan	Member			qbmi:QuebecorStockOptionPlanMember
1213	Disclosure of terms and conditions of share-based payment arrangement [line items]	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1214	Range of exercise price	Abstract			ifrs-full:DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsAbstract
1215	Exercise price of outstanding options	Concept (Monetary)	As Of		ifrs-full:ExercisePriceOfOutstandingShareOptions
1216	Number of shares outstanding	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
1217	Weighted average years to maturity	Concept (Decimal)	As Of		ifrs-full:WeightedAverageRemainingContractualLifeOfOutstandingShareOptions
1218	Weighted average exercise price of outstanding options	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
1219	Number of vested options	Concept (Decimal)	As Of		ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
1220	Weighted average exercise price of vested options	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement
1221	42304 - Disclosure - STOCK-BASED COMPENSATION PLANS - Quebecor mid-term stock-based plan (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureStockBasedCompensationPlansQuebecorMidTermStockBasedPlanDetails
1222	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1223	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1224	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
1225	Quebecor Mid-term stock-based compensation plan	Member			qbmi:QuebecorPlanStockAppreciationRightsMember
1226	STOCK-BASED COMPENSATION PLANS	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1227	Exercised (in shares)	Concept (Decimal)	For Period		ifrs-full:NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement
1228	Cash consideration on stock options exercised	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromExerciseOfOptions
1229	42305 - Disclosure - STOCK-BASED COMPENSATION PLANS - Quebecor deferred share unit plan (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureStockBasedCompensationPlansQuebecorDeferredShareUnitPlanDetails
1230	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1231	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1232	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
1233	Quebecor Deferred Share Unit Plan	Member			qbmi:QuebecorDeferredShareUnitPlanDirectorsMember
1234	Range [axis]	Axis			ifrs-full:RangeAxis
1235	Ranges [member]	Member			ifrs-full:RangesMember
1236	Minimum	Member			ifrs-full:BottomOfRangeMember
1237	Maximum	Member			ifrs-full:TopOfRangeMember
1238	STOCK-BASED COMPENSATION PLANS	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1239	Percent of total annual fee payable to director for receive of share based compensation	Concept (Percent)	For Period		qbmi:PercentageOfTotalAnnualFeePayableForDirectorShareBasedCompensation
1240	Number of units outstanding	Concept (Decimal)	As Of		ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
1241	42306 - Disclosure - STOCK-BASED COMPENSATION PLANS - Quebecor Media stock option plan (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureStockBasedCompensationPlansQuebecorMediaStockOptionPlanDetails
1242	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1243	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1244	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
1245	Quebecor Media stock option plan	Member			qbmi:QuebecorMediaStockOptionPlanMember
1246	Range [axis]	Axis			ifrs-full:RangeAxis
1247	Ranges [member]	Member			ifrs-full:RangesMember
1248	Maximum	Member			ifrs-full:TopOfRangeMember
1249	Vesting period [axis]	Axis			qbmi:VestingPeriodAxis
1250	Vesting period [domain]	Member			qbmi:VestingPeriodDomain
1251	Stock option plan - first anniversary	Member			qbmi:EmployeeStockOptionsFirstAnniversaryMember
1252	Stock option plan - second anniversary	Member			qbmi:EmployeeStockOptionsSecondAnniversaryMember
1253	Stock option plan - third anniversary	Member			qbmi:EmployeeStockOptionsThirdAnniversaryMember
1254	STOCK-BASED COMPENSATION PLANS	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1255	Number of shares authorized to issue under stock-based compensation plans	Concept (Shares)	As Of		qbmi:IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
1256	Term of an option	Concept (xbrli:durationItemType)	For Period		qbmi:ContractualLifeOfShareBasedAwards
1257	Vesting period of share based awards (in years)	Concept (xbrli:durationItemType)	For Period		qbmi:VestingLifeOfShareBasedAwards
1258	Annual vesting percent of share based awards	Concept (Percent)	For Period		qbmi:AwardVestingPercentagePerYearShareBasedAwards
1259	42307 - Disclosure - STOCK-BASED COMPENSATION PLANS - Quebecor Media outstanding options (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureStockBasedCompensationPlansQuebecorMediaOutstandingOptionsDetails
1260	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1261	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1262	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
1263	Quebecor Media stock option plan	Member			qbmi:QuebecorMediaStockOptionPlanMember
1264	STOCK-BASED COMPENSATION PLANS	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1265	Balance at beginning of year	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
1266	Exercised	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
1267	Cancelled	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement
1268	Balance at end of year	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
1269	Vested options at end of year	Concept (Decimal)	As Of		ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
1270	Balance at beginning of year	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
1271	Exercised	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement
1272	Cancelled	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement
1273	Balance at end of year	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
1274	Vested options at end of year	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement
1275	Cash consideration on stock options exercised	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromExerciseOfOptions
1276	42308 - Disclosure - STOCK-BASED COMPENSATION PLANS - Quebecor Media exercise price range of options (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureStockBasedCompensationPlansQuebecorMediaExercisePriceRangeOfOptionsDetails
1277	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1278	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1279	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
1280	Quebecor Media stock option plan	Member			qbmi:QuebecorMediaStockOptionPlanMember
1281	Ranges of exercise prices for outstanding share options [axis]	Axis			ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsAxis
1282	Ranges of exercise prices for outstanding share options [member]	Member			ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsMember
1283	$50.10 to 57.64	Member			qbmi:ExercisePriceRangeFromDollar50.10ToDollar57.64Member
1284	$63.50 to 70.56	Member			qbmi:ExercisePriceRangeFromDollar63.50ToDollar70.56Member
1285	Range [axis]	Axis			ifrs-full:RangeAxis
1286	Ranges [member]	Member			ifrs-full:RangesMember
1287	Minimum	Member			ifrs-full:BottomOfRangeMember
1288	Maximum	Member			ifrs-full:TopOfRangeMember
1289	Disclosure of terms and conditions of share-based payment arrangement [line items]	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1290	Range of exercise price	Abstract			ifrs-full:DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsAbstract
1291	Exercise price of outstanding options	Concept (Monetary)	As Of		ifrs-full:ExercisePriceOfOutstandingShareOptions
1292	Number of shares outstanding	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
1293	Weighted average years to maturity	Concept (Decimal)	As Of		ifrs-full:WeightedAverageRemainingContractualLifeOfOutstandingShareOptions
1294	Weighted average exercise price of outstanding options	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
1295	Number of vested options	Concept (Decimal)	As Of		ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
1296	Weighted average exercise price of vested options	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement
1297	42309 - Disclosure - STOCK-BASED COMPENSATION PLANS - TVA Group stock option plan (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureStockBasedCompensationPlansTvaGroupStockOptionPlanDetails
1298	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1299	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1300	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
1301	TVA Group stock option plan	Member			qbmi:TvaGroupStockOptionPlanMember
1302	Classes of ordinary shares [axis]	Axis			ifrs-full:ClassesOfOrdinarySharesAxis
1303	Ordinary shares	Member			ifrs-full:OrdinarySharesMember
1304	Class B	Member			qbmi:OrdinarySharesClassBMember
1305	Vesting period [axis]	Axis			qbmi:VestingPeriodAxis
1306	Vesting period [domain]	Member			qbmi:VestingPeriodDomain
1307	Stock option plan - first anniversary	Member			qbmi:EmployeeStockOptionsFirstAnniversaryMember
1308	Stock option plan - second anniversary	Member			qbmi:EmployeeStockOptionsSecondAnniversaryMember
1309	Stock option plan - third anniversary	Member			qbmi:EmployeeStockOptionsThirdAnniversaryMember
1310	Range [axis]	Axis			ifrs-full:RangeAxis
1311	Ranges [member]	Member			ifrs-full:RangesMember
1312	Maximum	Member			ifrs-full:TopOfRangeMember
1313	STOCK-BASED COMPENSATION PLANS	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1314	Number of shares authorized to issue under stock-based compensation plans	Concept (Shares)	As Of		qbmi:IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
1315	Term of an option	Concept (xbrli:durationItemType)	For Period		qbmi:ContractualLifeOfShareBasedAwards
1316	Vesting period of share based awards (in years)	Concept (xbrli:durationItemType)	For Period		qbmi:VestingLifeOfShareBasedAwards
1317	Annual vesting percent of share based awards	Concept (Percent)	For Period		qbmi:AwardVestingPercentagePerYearShareBasedAwards
1318	42310 - Disclosure - STOCK-BASED COMPENSATION PLANS - TVA Group outstanding options (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureStockBasedCompensationPlansTvaGroupOutstandingOptionsDetails
1319	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1320	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1321	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
1322	TVA Group stock option plan	Member			qbmi:TvaGroupStockOptionPlanMember
1323	Range [axis]	Axis			ifrs-full:RangeAxis
1324	Ranges [member]	Member			ifrs-full:RangesMember
1325	Minimum	Member			ifrs-full:BottomOfRangeMember
1326	Maximum	Member			ifrs-full:TopOfRangeMember
1327	STOCK-BASED COMPENSATION PLANS	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1328	Balance at beginning of year	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
1329	Granted (in shares)	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
1330	Cancelled	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement
1331	Expired (in shares)	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsExpiredInSharebasedPaymentArrangement
1332	Balance at end of year	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
1333	Vested options at end of year	Concept (Decimal)	As Of		ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
1334	Balance at beginning of year	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
1335	Granted (in dollars per share)	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement
1336	Cancelled	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement
1337	Expired (in dollars per share)	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfShareOptionsExpiredInSharebasedPaymentArrangement
1338	Balance at end of year	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
1339	Vested options at end of year	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement
1340	Exercise price of outstanding options	Concept (Monetary)	As Of		ifrs-full:ExercisePriceOfOutstandingShareOptions
1341	Weighted average years to maturity	Concept (Decimal)	As Of		ifrs-full:WeightedAverageRemainingContractualLifeOfOutstandingShareOptions
1342	42311 - Disclosure - STOCK-BASED COMPENSATION PLANS - Deferred share unit and performance share unit plans (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureStockBasedCompensationPlansDeferredShareUnitAndPerformanceShareUnitPlansDetails
1343	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1344	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1345	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
1346	Quebecor deferred share unit plan, employees	Member			qbmi:QuebecorDeferredShareUnitPlanEmployeesMember
1347	Quebecor performance shares, employees	Member			qbmi:QuebecorPerformanceSharesEmployeesMember
1348	TVA group deferred share unit plan, employees	Member			qbmi:TVGroupDeferredShareUnitPlanEmployeesMember
1349	TVA group performance shares, employees	Member			qbmi:TvaGroupPerformanceSharesEmployeesMember
1350	STOCK-BASED COMPENSATION PLANS	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1351	Vesting life of share based awards	Concept (xbrli:durationItemType)	For Period		qbmi:VestingLifeOfShareBasedAwards
1352	Number of units outstanding	Concept (Decimal)	As Of		ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
1353	42312 - Disclosure - STOCK-BASED COMPENSATION PLANS - Assumptions in estimating the fair value of awards (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureStockBasedCompensationPlansAssumptionsInEstimatingFairValueOfAwardsDetails
1354	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1355	Types of share-based payment arrangements [axis]	Axis			ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1356	Share-based payment arrangements [member]	Member			ifrs-full:SharebasedPaymentArrangementsMember
1357	Quebecor Stock option plan	Member			qbmi:QuebecorStockOptionPlanMember
1358	Quebecor Media stock option plan	Member			qbmi:QuebecorMediaStockOptionPlanMember
1359	TVA Group stock option plan	Member			qbmi:TvaGroupStockOptionPlanMember
1360	STOCK-BASED COMPENSATION PLANS	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1361	Risk-free interest rate	Concept (Percent)	For Period		ifrs-full:DescriptionOfRiskFreeInterestRateShareOptionsGranted
1362	Distribution yield	Concept (Percent)	For Period		ifrs-full:ExpectedDividendAsPercentageShareOptionsGranted
1363	Expected volatility (as a percent)	Concept (Percent)	For Period		ifrs-full:DescriptionOfExpectedVolatilityShareOptionsGranted
1364	Expected remaining life	Concept (Decimal)	For Period		ifrs-full:DescriptionOfOptionLifeShareOptionsGranted
1365	42313 - Disclosure - STOCK-BASED COMPENSATION PLANS - Liability and expense (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureStockBasedCompensationPlansLiabilityAndExpenseDetails
1366	Implied Table	Table	*	*	implied:Table
1367	STOCK-BASED COMPENSATION PLANS	Abstract			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementAbstract
1368	Liability for all vested options under intrinsic value	Concept (Monetary)	As Of	Credit	ifrs-full:IntrinsicValueOfLiabilitiesFromSharebasedPaymentTransactionsForWhichCounterpartysRightToCashOrOtherAssetsVested2011
1369	Consolidated charge related to stock-based compensation	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees
1370	42401 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureAccumulatedOtherComprehensiveLossDetails
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1382	42501 - Disclosure - COMMITMENTS (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureCommitmentsDetails
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1397	42601 - Disclosure - GUARANTEES (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureGuaranteesDetails
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1402	42701 - Disclosure - FINANCIAL INSTRUMENTS AND FINANCIAL RISK MANAGEMENT - Description of derivative financial instruments (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureFinancialInstrumentsAndFinancialRiskManagementDescriptionOfDerivativeFinancialInstrumentsDetails
1403	Disclosure of detailed information about financial instruments [table]	Table	*	*	ifrs-full:DisclosureOfFinancialInstrumentsTable
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1433	42702 - Disclosure - FINANCIAL INSTRUMENTS AND FINANCIAL RISK MANAGEMENT - Carrying value and fair value of financial assets (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureFinancialInstrumentsAndFinancialRiskManagementCarryingValueAndFairValueOfFinancialAssetsDetails
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1446	42703 - Disclosure - FINANCIAL INSTRUMENTS AND FINANCIAL RISK MANAGEMENT - Carrying value and fair value of financial liabilities (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureFinancialInstrumentsAndFinancialRiskManagementCarryingValueAndFairValueOfFinancialLiabilitiesDetails
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1459	42704 - Disclosure - FINANCIAL INSTRUMENTS AND FINANCIAL RISK MANAGEMENT - Fair value of derivative financial instruments designated as hedges (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureFinancialInstrumentsAndFinancialRiskManagementFairValueOfDerivativeFinancialInstrumentsDesignatedAsHedgesDetails
1460	Disclosure of detailed information about hedges [table]	Table	*	*	ifrs-full:DisclosureOfHedgeAccountingTable
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1467	42705 - Disclosure - FINANCIAL INSTRUMENTS AND FINANCIAL RISK MANAGEMENT - Credit risk management (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureFinancialInstrumentsAndFinancialRiskManagementCreditRiskManagementDetails
1468	Disclosure of risk management strategy related to hedge accounting [table]	Table	*	*	ifrs-full:DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingTable
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1478	42706 - Disclosure - FINANCIAL INSTRUMENTS AND FINANCIAL RISK MANAGEMENT - Allowance for doubtful accounts (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureFinancialInstrumentsAndFinancialRiskManagementAllowanceForDoubtfulAccountsDetails
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1491	42707 - Disclosure - FINANCIAL INSTRUMENTS AND FINANCIAL RISK MANAGEMENT - Liquidity risk management (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureFinancialInstrumentsAndFinancialRiskManagementLiquidityRiskManagementDetails
1492	Disclosure of maturity analysis for financial assets held for managing liquidity risk [table]	Table	*	*	ifrs-full:DisclosureOfMaturityAnalysisForFinancialAssetsHeldForManagingLiquidityRiskTable
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1510	42708 - Disclosure - FINANCIAL INSTRUMENTS AND FINANCIAL RISK MANAGEMENT - Market risk (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureFinancialInstrumentsAndFinancialRiskManagementMarketRiskDetails
1511	Disclosure of risk management strategy related to hedge accounting [table]	Table	*	*	ifrs-full:DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingTable
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1530	42709 - Disclosure - FINANCIAL INSTRUMENTS AND FINANCIAL RISK MANAGEMENT - Capital management (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureFinancialInstrumentsAndFinancialRiskManagementCapitalManagementDetails
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1540	42801 - Disclosure - RELATED PARTY TRANSACTIONS (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureRelatedPartyTransactionsDetails
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1553	42901 - Disclosure - PENSION PLANS AND POSTRETIREMENT BENEFITS - Indexation features (Details)	Network	*	*	http://www.quebecor.com/role/DisclosurePensionPlansAndPostretirementBenefitsIndexationFeaturesDetails
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1561	42902 - Disclosure - PENSION PLANS AND POSTRETIREMENT BENEFITS - Changes in the plans benefit obligations (Details)	Network	*	*	http://www.quebecor.com/role/DisclosurePensionPlansAndPostretirementBenefitsChangesInPlansBenefitObligationsDetails
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1583	42903 - Disclosure - PENSION PLANS AND POSTRETIREMENT BENEFITS - Changes in the fair value of plan assets (Details)	Network	*	*	http://www.quebecor.com/role/DisclosurePensionPlansAndPostretirementBenefitsChangesInFairValueOfPlanAssetsDetails
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1597	Administrative fees	Concept (Monetary)	For Period	Credit	qbmi:AdministrativeExpenseEffectOnNetBenefitLiabilityAsset
1598	Benefits and settlements paid	Concept (Monetary)	For Period	Debit	qbmi:PaymentsAndSettlementsNetDefinedBenefitLiabilityAsset
1599	Plan transfer	Concept (Monetary)	For Period	Debit	qbmi:GainsLossesArisingFromPlanTransferNetDefinedBenefitLiabilityAsset
1600	Fair value of plan assets at the end of the year	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1601	42904 - Disclosure - PENSION PLANS AND POSTRETIREMENT BENEFITS - Components of plan assets and reconciliation of funded status (Details)	Network	*	*	http://www.quebecor.com/role/DisclosurePensionPlansAndPostretirementBenefitsComponentsOfPlanAssetsAndReconciliationOfFundedStatusDetails
1602	Disclosure of defined benefit plans [table]	Table	*	*	ifrs-full:DisclosureOfDefinedBenefitPlansTable
1603	Net defined benefit liability (asset) [axis]	Axis			ifrs-full:NetDefinedBenefitLiabilityAssetAxis
1604	Net defined benefit liability (asset) [member]	Member			ifrs-full:NetDefinedBenefitLiabilityAssetMember
1605	Plan assets	Member			ifrs-full:PlanAssetsMember
1606	Characteristics of defined benefit plans [axis]	Axis			ifrs-full:CharacteristicsOfDefinedBenefitPlansAxis
1607	Characteristics of defined benefit plans [member]	Member			ifrs-full:CharacteristicsOfDefinedBenefitPlansMember
1608	Pension defined benefit plans	Member			ifrs-full:PensionDefinedBenefitPlansMember
1609	Postretirement defined benefit plans	Member			qbmi:PostretirementDefinedBenefitPlansMember
1610	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
1611	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
1612	Canadian	Member			ifrs-full:CountryOfDomicileMember
1613	Foreign	Member			ifrs-full:ForeignCountriesMember
1614	Disclosure of net defined benefit liability (asset)	LineItems			ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
1615	Weighted average duration of defined benefit obligations	Concept (Decimal)	For Period		ifrs-full:WeightedAverageDurationOfDefinedBenefitObligation
1616	Expected future benefit payments in 2019	Concept (Monetary)	As Of	Credit	qbmi:ExpectedFutureBenefitPayments
1617	Plan assets	Abstract			qbmi:PlanAssetsAbstract
1618	Equity securities (as a percent)	Concept (Percent)	For Period		qbmi:TotalPlanAssetsEquitySecuritiesPercentage
1619	Debt securities (as a percent)	Concept (Percent)	For Period		qbmi:TotalPlanAssetsDebtSecuritiesPercentage
1620	Other (as a percent)	Concept (Percent)	For Period		qbmi:TotalPlanAssetsOtherPercentage
1621	Total plan assets (in percent)	Concept (Percent)	For Period		qbmi:PlanAssetsPercentageTotal
1622	Reconciliation of funded status to net amount recognized	Abstract			qbmi:ReconciliationOfFundedStatusToNetAmountRecognizedOfBenefitObligationsAbstract
1623	Benefit obligations	Concept (Monetary)	As Of	Credit	ifrs-full:DefinedBenefitObligationAtPresentValue
1624	Fair value of plan assets	Concept (Monetary)	As Of	Debit	ifrs-full:PlanAssetsAtFairValue
1625	Plan deficit	Concept (Monetary)	As Of	Debit	ifrs-full:SurplusDeficitInPlan
1626	Asset limit and minimum funding adjustment	Concept (Monetary)	As Of	Debit	qbmi:AssetLimitAndMinimumFundingAdjustmentsOfDefinedBenefitPlan
1627	Net amount recognized	Concept (Monetary)	As Of	Debit	qbmi:NetRecognizedAmountOfDefinedBenefitLiabilityAsset
1628	Recognized assets, defined benefit plan	Concept (Monetary)	As Of	Debit	ifrs-full:RecognisedAssetsDefinedBenefitPlan
1629	Recognized liabilities, defined benefit plans	Concept (Monetary)	As Of	Credit	ifrs-full:RecognisedLiabilitiesDefinedBenefitPlan
1630	42905 - Disclosure - PENSION PLANS AND POSTRETIREMENT BENEFITS - Components of re-measurements (Details)	Network	*	*	http://www.quebecor.com/role/DisclosurePensionPlansAndPostretirementBenefitsComponentsOfReMeasurementsDetails
1631	Disclosure of defined benefit plans [table]	Table	*	*	ifrs-full:DisclosureOfDefinedBenefitPlansTable
1632	Characteristics of defined benefit plans [axis]	Axis			ifrs-full:CharacteristicsOfDefinedBenefitPlansAxis
1633	Characteristics of defined benefit plans [member]	Member			ifrs-full:CharacteristicsOfDefinedBenefitPlansMember
1634	Pension defined benefit plans	Member			ifrs-full:PensionDefinedBenefitPlansMember
1635	Postretirement defined benefit plans	Member			qbmi:PostretirementDefinedBenefitPlansMember
1636	Disclosure of net defined benefit liability (asset)	LineItems			ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
1637	Actuarial gain (loss) on benefit obligations	Concept (Monetary)	For Period	Credit	qbmi:ActuarialGainsLossesNetDefinedBenefitLiabilityAsset
1638	Actual return on plan assets, less interest income anticipated in the interest on the net defined benefit liability calculation	Concept (Monetary)	For Period	Credit	qbmi:ReturnOnPlanAssetsNetOfInterestIncomeNetDefinedBenefitLiabilityAsset
1639	Asset limit and minimum funding adjustment	Concept (Monetary)	For Period	Debit	ifrs-full:GainLossOnChangesInEffectOfLimitingNetDefinedBenefitAssetToAssetCeiling
1640	Re-measurements gain (loss) recorded in other comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
1641	42906 - Disclosure - PENSION PLANS AND POSTRETIREMENT BENEFITS - Components of the net benefit costs (Details)	Network	*	*	http://www.quebecor.com/role/DisclosurePensionPlansAndPostretirementBenefitsComponentsOfNetBenefitCostsDetails
1642	Disclosure of defined benefit plans [table]	Table	*	*	ifrs-full:DisclosureOfDefinedBenefitPlansTable
1643	Characteristics of defined benefit plans [axis]	Axis			ifrs-full:CharacteristicsOfDefinedBenefitPlansAxis
1644	Characteristics of defined benefit plans [member]	Member			ifrs-full:CharacteristicsOfDefinedBenefitPlansMember
1645	Pension defined benefit plans	Member			ifrs-full:PensionDefinedBenefitPlansMember
1646	Postretirement defined benefit plans	Member			qbmi:PostretirementDefinedBenefitPlansMember
1647	Disclosure of defined benefit plans [line items]	LineItems			ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
1648	Employee costs:	Abstract			ifrs-full:ClassesOfEmployeeBenefitsExpenseAbstract
1649	Service costs	Concept (Monetary)	For Period	Debit	qbmi:DefinedBenefitPlansServiceCost
1650	Administrative fees and other	Concept (Monetary)	For Period	Debit	qbmi:PostEmploymentBenefitExpenseAdministrativeFeesAndOther
1651	Interest on net defined benefit liability	Concept (Monetary)	For Period	Debit	qbmi:DefinedBenefitPlansInterestExpense
1652	Net benefit costs	Concept (Monetary)	For Period	Debit	ifrs-full:PostemploymentBenefitExpenseDefinedBenefitPlans
1653	42907 - Disclosure - PENSION PLANS AND POSTRETIREMENT BENEFITS - Defined contribution plans (Details)	Network	*	*	http://www.quebecor.com/role/DisclosurePensionPlansAndPostretirementBenefitsDefinedContributionPlansDetails
1654	Implied Table	Table	*	*	implied:Table
1655	PENSION PLANS AND POSTRETIREMENT BENEFITS	Abstract			ifrs-full:DisclosureOfDefinedBenefitPlansAbstract
1656	Defined contribution expense	Concept (Monetary)	For Period	Debit	ifrs-full:PostemploymentBenefitExpenseDefinedContributionPlans
1657	42908 - Disclosure - PENSION PLANS AND POSTRETIREMENT BENEFITS - Assumptions and sensitivity analysis (Details)	Network	*	*	http://www.quebecor.com/role/DisclosurePensionPlansAndPostretirementBenefitsAssumptionsAndSensitivityAnalysisDetails
1658	Disclosure of defined benefit plans [table]	Table	*	*	ifrs-full:DisclosureOfDefinedBenefitPlansTable
1659	Characteristics of defined benefit plans [axis]	Axis			ifrs-full:CharacteristicsOfDefinedBenefitPlansAxis
1660	Characteristics of defined benefit plans [member]	Member			ifrs-full:CharacteristicsOfDefinedBenefitPlansMember
1661	Pension defined benefit plans	Member			ifrs-full:PensionDefinedBenefitPlansMember
1662	Postretirement defined benefit plans	Member			qbmi:PostretirementDefinedBenefitPlansMember
1663	Net defined benefit liability (asset) [axis]	Axis			ifrs-full:NetDefinedBenefitLiabilityAssetAxis
1664	Net defined benefit liability (asset) [member]	Member			ifrs-full:NetDefinedBenefitLiabilityAssetMember
1665	Plan assets	Member			ifrs-full:PlanAssetsMember
1666	Actuarial assumptions [axis]	Axis			ifrs-full:ActuarialAssumptionsAxis
1667	Actuarial assumptions [member]	Member			ifrs-full:ActuarialAssumptionsMember
1668	Actuarial assumption discount rate	Member			ifrs-full:ActuarialAssumptionOfDiscountRatesMember
1669	Disclosure of net defined benefit liability (asset)	LineItems			ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
1670	Expected employer contributions in 2019	Concept (Monetary)	For Period	Credit	ifrs-full:EstimateOfContributionsExpectedToBePaidToPlan
1671	Employer contributions	Concept (Monetary)	For Period	Debit	ifrs-full:ContributionsToPlanByEmployerNetDefinedBenefitLiabilityAsset
1672	Benefit obligations	Abstract			ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetAbstract
1673	Discount rate, current year (as a percent)	Concept (Percent)	As Of		qbmi:ActuarialAssumptionOfDiscountRatesCurrentYear
1674	Rate of compensation increase, current year (as a percent)	Concept (Percent)	As Of		qbmi:ActuarialAssumptionOfExpectedRatesOfCompensationIncreasesCurrentYear
1675	Decrease of retirement benefit obligation due to increase of actuarial assumption of 10 basis points in discount rate	Concept (Monetary)	As Of	Credit	ifrs-full:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption
1676	Percentage increase of discount rate (as a percent)	Concept (Percent)	As Of		ifrs-full:PercentageOfReasonablyPossibleIncreaseInActuarialAssumption
1677	Current periodic costs	Abstract			qbmi:CurrentPeriodicCostsAbstract
1678	Discount rate, preceding year (as a percent)	Concept (Percent)	As Of		qbmi:ActuarialAssumptionOfDiscountRatesPrecedingYear
1679	Rate of compensation increase, preceding year (as a percent)	Concept (Percent)	As Of		qbmi:ActuarialAssumptionOfExpectedRatesOfCompensationIncreasesPrecedingYear
1680	Assumed average retirement age	Concept (Decimal)	As Of		ifrs-full:ActuarialAssumptionOfRetirementAge
1681	Assumed health care cost trend rate (as a percent)	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfMedicalCostTrendRates
1682	Assumed health care cost trend rate after ten years (as a percent)	Concept (Percent)	As Of		qbmi:ActuarialAssumptionOfMedicalCostTrendRatesAfterTenYears
1683	43001 - Disclosure - DISCONTINUED OPERATIONS - General information (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureDiscontinuedOperationsGeneralInformationDetails
1684	Disclosure of analysis of single amount of discontinued operations [table]	Table	*	*	ifrs-full:DisclosureOfAnalysisOfSingleAmountOfDiscontinuedOperationsTable
1685	Continuing and discontinued operations [axis]	Axis			ifrs-full:ContinuingAndDiscontinuedOperationsAxis
1686	Continuing operations [member]	Member			ifrs-full:ContinuingOperationsMember
1687	Discontinued operations	Member			ifrs-full:DiscontinuedOperationsMember
1688	4Degrees Inc. Colocation data centers	Member			qbmi:ColocationDataCentersOperations4degreesIncMember
1689	English-language newspaper operations	Member			qbmi:EnglishLanguageNewspaperOperationsHeldForSaleMember
1690	DISCONTINUED OPERATIONS	LineItems			ifrs-full:DisclosureOfAnalysisOfSingleAmountOfDiscontinuedOperationsLineItems
1691	Amount received from discontinued operations	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations
1692	Gain on disposal of businesses	Concept (Monetary)	For Period	Credit	ifrs-full:GainLossRecognisedOnMeasurementToFairValueLessCostsToSellOrOnDisposalOfAssetsOrDisposalGroupsConstitutingDiscontinuedOperation
1693	The amount deferred from the proceeds received on discontinued operations	Concept (Monetary)	As Of	Credit	qbmi:ProceedsDeferredWithPresentValueDiscontinuedOperations
1694	Tax benefit on discontinued operations	Concept (Monetary)	For Period	Debit	ifrs-full:TaxExpenseRelatingToGainLossOnDiscontinuance
1695	43002 - Disclosure - DISCONTINUED OPERATIONS - Discontinued operations statements of income and comprehensive income (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureDiscontinuedOperationsDiscontinuedOperationsStatementsOfIncomeAndComprehensiveIncomeDetails
1696	Disclosure of analysis of single amount of discontinued operations [table]	Table	*	*	ifrs-full:DisclosureOfAnalysisOfSingleAmountOfDiscontinuedOperationsTable
1697	Continuing and discontinued operations [axis]	Axis			ifrs-full:ContinuingAndDiscontinuedOperationsAxis
1698	Continuing operations [member]	Member			ifrs-full:ContinuingOperationsMember
1699	Discontinued operations	Member			ifrs-full:DiscontinuedOperationsMember
1700	DISCONTINUED OPERATIONS	LineItems			ifrs-full:DisclosureOfAnalysisOfSingleAmountOfDiscontinuedOperationsLineItems
1701	Revenues	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromContractsWithCustomers
1702	Expenses	Concept (Monetary)	For Period	Debit	ifrs-full:OperatingExpense
1703	Income taxes	Concept (Monetary)	For Period	Debit	ifrs-full:TaxExpenseRelatingToProfitLossFromOrdinaryActivitiesOfDiscontinuedOperations
1704	Gain related to a business sold in 2015	Concept (Monetary)	For Period	Credit	ifrs-full:GainLossRecognisedOnMeasurementToFairValueLessCostsToSellOrOnDisposalOfAssetsOrDisposalGroupsConstitutingDiscontinuedOperation
1705	Income from discontinued operations	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromDiscontinuedOperations
1706	43003 - Disclosure - DISCONTINUED OPERATIONS - Discontinued operations statements cash flows (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureDiscontinuedOperationsDiscontinuedOperationsStatementsCashFlowsDetails
1707	Implied Table	Table	*	*	implied:Table
1708	DISCONTINUED OPERATIONS	Abstract			ifrs-full:NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwnersAbstract
1709	Cash flows related to operating activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInOperatingActivitiesDiscontinuedOperations
1710	Cash flows related to investing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInInvestingActivitiesDiscontinuedOperations
1711	Cash flows provided by (used in) discontinued operations	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseInCashAndCashEquivalentsDiscontinuedOperations
1712	43004 - Disclosure - DISCONTINUED OPERATIONS - Discontinued operations statements balance sheet (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureDiscontinuedOperationsDiscontinuedOperationsStatementsBalanceSheetDetails
1713	Noncurrent assets or disposal groups classified as held for sales [table]	Table	*	*	qbmi:NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSalesTable
1714	Assets and liabilities classified as held for sale [axis]	Axis			ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleAxis
1715	Assets and liabilities not classified as held for sale [member]	Member			ifrs-full:AssetsAndLiabilitiesNotClassifiedAsHeldForSaleMember
1716	Assets and liabilities classified as held-for-sale	Member			ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleMember
1717	Noncurrent assets or disposal groups classified as held for sales [line items]	LineItems			qbmi:NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSalesLineItems
1718	Net assets held for sale	Abstract			ifrs-full:NetAssetsLiabilitiesAbstract
1719	Current assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssets
1720	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
1721	Intangible assets and goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsAndGoodwill
1722	Assets	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
1723	Current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentLiabilities
1724	Net assets	Concept (Monetary)	As Of	Debit	ifrs-full:NetAssetsLiabilities
1725	43101 - Disclosure - NON-CONSOLIDATED FINANCIAL STATEMENTS OF THE CORPORATION - Non-consolidated condensed statements of income and comprehensive income (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureNonConsolidatedFinancialStatementsOfCorporationNonConsolidatedCondensedStatementsOfIncomeAndComprehensiveIncomeDetails
1726	Condensed Income Statement [Table]	Table	*	*	srt:CondensedIncomeStatementTable
1727	Consolidated Entities [Axis]	Axis			srt:ConsolidatedEntitiesAxis
1728	Consolidated Entities [Domain]	Member			srt:ConsolidatedEntitiesDomain
1729	Parent Company	Member			srt:ParentCompanyMember
1730	Condensed Income Statements, Captions [Line Items]	LineItems			srt:CondensedIncomeStatementsCaptionsLineItems
1731	Revenues:	Abstract			ifrs-full:RevenueAbstract
1732	Distributions in excess of the investments in subsidiaries	Concept (Monetary)	For Period	Credit	qbmi:DistributionsReceivedInExcessOfInvestmentsInSubsidiaries
1733	Dividends	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromDividends
1734	Management fees	Concept (Monetary)	For Period	Credit	qbmi:RevenueFromManagementFees
1735	Interest on loans to the parent corporation	Concept (Monetary)	For Period	Credit	ifrs-full:InterestIncomeOnLoansAndReceivables
1736	Other	Concept (Monetary)	For Period	Credit	ifrs-full:OtherIncome
1737	Revenues	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromContractsWithCustomers
1738	General and administrative expenses	Concept (Monetary)	For Period	Debit	ifrs-full:GeneralAndAdministrativeExpense
1739	Depreciation and amortization	Concept (Monetary)	For Period	Debit	ifrs-full:DepreciationAndAmortisationExpense
1740	Financial expenses	Concept (Monetary)	For Period	Debit	ifrs-full:FinanceCosts
1741	Loss (gain) on valuation and translation of financial instruments	Concept (Monetary)	For Period	Credit	qbmi:GainLossOnValuationAndTranslationOfFinancialInstruments
1742	Loss on debt refinancing	Concept (Monetary)	For Period	Credit	qbmi:GainLossOnDebtRefinancing
1743	Impairment and disposal of investments in subsidiaries	Concept (Monetary)	For Period	Credit	ifrs-full:AdjustmentsForGainLossOnDisposalOfInvestmentsInSubsidiariesJointVenturesAndAssociates
1744	Loss on notes receivable from subsidiaries	Concept (Monetary)	For Period	Credit	qbmi:GainsLossesRecognisedInProfitOrLossTradeReceivablesFromSubsidiaries
1745	Other	Concept (Monetary)	For Period	Credit	ifrs-full:OtherGainsLosses
1746	Income before income taxes	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossBeforeTax
1747	Income taxes (recovery)	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
1748	Net income	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
1749	Other comprehensive (loss) gain	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncome
1750	Comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
1751	43102 - Disclosure - NON-CONSOLIDATED FINANCIAL STATEMENTS OF THE CORPORATION - Non-consolidated and condensed statements of cash flows (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureNonConsolidatedFinancialStatementsOfCorporationNonConsolidatedAndCondensedStatementsOfCashFlowsDetails
1752	Condensed Cash Flow Statement [Table]	Table	*	*	srt:CondensedCashFlowStatementTable
1753	Consolidated Entities [Axis]	Axis			srt:ConsolidatedEntitiesAxis
1754	Consolidated Entities [Domain]	Member			srt:ConsolidatedEntitiesDomain
1755	Parent Company	Member			srt:ParentCompanyMember
1756	Condensed Cash Flow Statements, Captions [Line Items]	LineItems			srt:CondensedCashFlowStatementsCaptionsLineItems
1757	Cash flows related to operations	Abstract			ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
1758	Net income	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
1759	Depreciation and amortization	Concept (Monetary)	For Period	Debit	ifrs-full:DepreciationAndAmortisationExpense
1760	Loss (gain) on valuation and translation of financial instruments	Concept (Monetary)	For Period	Credit	qbmi:GainLossOnValuationAndTranslationOfFinancialInstruments
1761	Amortization of financing costs and long-term debt discount	Concept (Monetary)	For Period	Debit	qbmi:AdjustmentsForAmortizationOfFinancingCostsAndLongTermDebtDiscount
1762	Loss on debt refinancing	Concept (Monetary)	For Period	Credit	qbmi:GainLossOnDebtRefinancing
1763	Impairment and disposal of investments in subsidiaries	Concept (Monetary)	For Period	Credit	ifrs-full:AdjustmentsForGainLossOnDisposalOfInvestmentsInSubsidiariesJointVenturesAndAssociates
1764	Loss on notes receivable from subsidiaries	Concept (Monetary)	For Period	Credit	qbmi:GainsLossesRecognisedInProfitOrLossTradeReceivablesFromSubsidiaries
1765	Deferred income taxes	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDeferredTaxExpense
1766	Other	Concept (Monetary)	For Period	Debit	ifrs-full:OtherAdjustmentsToReconcileProfitLoss
1767	Net change in non-cash balances related to operations	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseInWorkingCapital
1768	Cash flows provided by operations	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperatingActivities
1769	Cash flows related to investing activities	Abstract			ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
1770	Net change in investments in subsidiaries	Concept (Monetary)	For Period	Debit	qbmi:NetChangeInInvestmentsInSubsidiaries
1771	Proceeds from disposal of subsidiaries	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
1772	Acquisition of tax deductions from the parent corporation	Concept (Monetary)	For Period	Credit	qbmi:AcquisitionOfTaxDeductionsFromParentCorporation
1773	Other	Concept (Monetary)	For Period	Debit	ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsInvestingActivities
1774	Cash flows provided by (used in) investing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInInvestingActivities
1775	Cash flows related to financing activities	Abstract			ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
1776	Net change in bank indebtedness	Concept (Monetary)	For Period	Debit	qbmi:CashInflowOutflowDueToChangeInBankIndebtedness
1777	Net change under revolving facilities	Concept (Monetary)	For Period	Debit	qbmi:CashInflowOutflowDueToChangeInRevolvingFacilities
1778	Repayments of long-term debt	Concept (Monetary)	For Period	Credit	ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
1779	Settlement of hedging contracts	Concept (Monetary)	For Period	Debit	qbmi:CashInflowOutflowFromSettlementOfHedgingContracts
1780	Repurchase of Common Shares	Concept (Monetary)	For Period	Credit	ifrs-full:PaymentsToAcquireOrRedeemEntitysShares
1781	Repurchase of redeemable preferred shares issued to subsidiaries	Concept (Monetary)	For Period	Credit	qbmi:PaymentsForRepurchaseOfRedeemablePreferredStockIssuedToSubsidiaries
1782	Dividends and reduction of paid-up capital	Concept (Monetary)	For Period	Credit	qbmi:PaymentForDividendsAndReductionOfPaidUpCapital
1783	Net change in subordinated loans from subsidiaries	Concept (Monetary)	For Period	Debit	qbmi:CashInflowOutflowDueToChangeInSubordinatedLoansFromSubsidiaries
1784	Net change in convertible obligations, subordinated loans and notes receivable - subsidiaries	Concept (Monetary)	For Period	Debit	qbmi:CashInflowOutflowDueToChangeInConvertibleObligationsSubordinatedLoansAndNotesReceivablesFromSubsidiaries
1785	Net change in loans to the parent corporation	Concept (Monetary)	For Period	Debit	qbmi:CashInflowOutflowDueToChangeInLoansToParentCorporation
1786	Net change in advances to or from subsidiaries	Concept (Monetary)	For Period	Debit	qbmi:CashInflowOutflowDueToChangeInAdvancesSubsidiaries
1787	Cash flows used in financing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInFinancingActivities
1788	Net change in cash and cash equivalents	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
1789	Cash and cash equivalents at the beginning of the year	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
1790	Cash and cash equivalents at the end of the year	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
1791	43103 - Disclosure - NON-CONSOLIDATED FINANCIAL STATEMENTS OF THE CORPORATION - Non-consolidated and condensed balance sheets (Details)	Network	*	*	http://www.quebecor.com/role/DisclosureNonConsolidatedFinancialStatementsOfCorporationNonConsolidatedAndCondensedBalanceSheetsDetails
1792	Condensed Balance Sheet Statement [Table]	Table	*	*	srt:CondensedBalanceSheetStatementTable
1793	Consolidated Entities [Axis]	Axis			srt:ConsolidatedEntitiesAxis
1794	Consolidated Entities [Domain]	Member			srt:ConsolidatedEntitiesDomain
1795	Parent Company	Member			srt:ParentCompanyMember
1796	Condensed Balance Sheet Statements, Captions [Line Items]	LineItems			srt:CondensedBalanceSheetStatementsCaptionsLineItems
1797	Assets	Abstract			ifrs-full:AssetsAbstract
1798	Current assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssets
1799	Investments in subsidiaries at cost	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInSubsidiaries
1800	Advances to subsidiaries	Concept (Monetary)	As Of	Debit	qbmi:AdvancesToSubsidiaries
1801	Convertible obligations, subordinated loans and notes receivable - subsidiaries	Concept (Monetary)	As Of	Debit	qbmi:ConvertibleObligationSubordinatedLoansAndNotesReceivableSubsidiaries
1802	Loans to the parent corporation	Concept (Monetary)	As Of	Debit	ifrs-full:AmountsReceivableRelatedPartyTransactions
1803	Other assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherNoncurrentFinancialAssets
1804	Total assets	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
1805	Liabilities and equity	Abstract			ifrs-full:EquityAndLiabilitiesAbstract
1806	Current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentLiabilities
1807	Long-term debt	Concept (Monetary)	As Of	Credit	ifrs-full:LongtermBorrowings
1808	Advances from subsidiaries	Concept (Monetary)	As Of	Credit	qbmi:AdvancesFromSubsidiaries
1809	Other liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:OtherNoncurrentFinancialLiabilities
1810	Subordinated loan from subsidiaries	Concept (Monetary)	As Of	Credit	qbmi:SubordinatedLiabilitiesSubsidiaries
1811	Equity attributable to shareholders	Concept (Monetary)	As Of	Credit	ifrs-full:EquityAttributableToOwnersOfParent
1812	Total liabilities and equity	Concept (Monetary)	As Of	Credit	ifrs-full:EquityAndLiabilities