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v3.25.0.1

leases (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 CAD ($) | Dec. 31, 2023 CAD ($)
Income from subleasing right-of-use lease assets |  |
Co-location sublet revenue included in Operating revenues - service | $ 17 | $ 17
Other sublet revenue included in Other income | 8 | 5
Lease payments | $ 826 | $ 671
Maximum |  |
Income from subleasing right-of-use lease assets |  |
Portion of real estate right-of-use assets that are subleased, as a percent | 20.00% |
Mobile site leases |  |
Potential exposure to non-executory cash outflows not including in lease liabilities |  |
Lease payments with index based price adjustments | 0.33 |

X
- 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 2024-01-01 -Paragraph 53 -Subparagraph f -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_f&doctype=Standard -URIDate 2024-03-27 + 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

X
- Definition The portion of lease payments with consumer price index-based price adjustments, resulting in future periodic remeasurements of the lease liability. + References No definition available. + Details
Name: | tu_LeasePaymentsWithIndexBasedPriceAdjustments
Namespace Prefix: | tu_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- 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

X
- Definition The portion of real estate right-of-use assets that have co-location subleases that we account for as operating leases, as a percentage. + References No definition available. + Details
Name: | tu_PercentOfRightOfUseAssetsSubleased
Namespace Prefix: | tu_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=tu_MobileSiteLeasesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |