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v3.20.4

leases (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Income from subleasing right-of-use lease assets |  |
Portion of real estate right-of-use assets that are subleased, as a percent | 20.00% |
Co-location sublet revenue included in operating service revenues | $ 17 | $ 18
Other sublet revenue included in other income | 4 | 2
Lease payments | $ 434 | $ 400

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- Definition The amount of income from subleasing right-of-use assets. Sublease is a transaction for which an underlying asset is re-leased by a lessee (‘intermediate lessor’) to a third party, and the lease (‘head lease’) between the head lessor and lessee remains in effect. [Refer: Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2020-01-01 -Paragraph 53 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2020-en-r&anchor=para_53_f&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_IncomeFromSubleasingRightofuseAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | tu_IncomeFromSubleasingRightOfUseAssetsAbstract
Namespace Prefix: | tu_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of payments on leases and subleases recognised as an expense by the lessee. + References No definition available. + Details
Name: | tu_LeaseAndSubleasePaymentsRecognisedAsExpense
Namespace Prefix: | tu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of other income from subleasing right-of-use assets. Sublease is a transaction for which an underlying asset is re-leased by a lessee ('intermediate lessor') to a third party, and the lease ('head lease') between the head lessor and lessee remains in effect. + References No definition available. + Details
Name: | tu_OtherIncomeFromSubleasingRightOfUseAssets
Namespace Prefix: | tu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The portion of real estate right-of-use assets that are subleased, as a percent. + References No definition available. + Details
Name: | tu_PercentOfRightOfUseAssetsSubleased
Namespace Prefix: | tu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration