Name:	ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

Name:	ifrs-full_ComprehensiveIncomeAttributableToAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The amount of comprehensive income attributable to owners of the parent. [Refer: Comprehensive income]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 106
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_106_a&doctype=Standard
-URIDate 2020-01-01

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 81B
-Subparagraph b
-Clause ii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_81B_b_ii&doctype=Standard
-URIDate 2020-01-01

Name:	ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The amount of investments in joint ventures in an entity's separate financial statements. [Refer: Joint ventures [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2020-01-01
-Paragraph 10
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2020-en-r&anchor=para_10&doctype=Standard
-URIDate 2020-01-01

Name:	ifrs-full_InvestmentsInJointVentures
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The amount of valuation provision for joint venture investment.

No definition available.

Name:	tu_InvestmentInJointVentureValuationProvision
Namespace Prefix:	tu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The construction credit facilities financing costs charged in the joint venture.

No definition available.

Name:	tu_JointVentureConstructionCreditFinancingCostsCharged
Namespace Prefix:	tu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The amount of credit facilities advances to joint ventures.

No definition available.

Name:	tu_JointVentureCreditFacilitiesAdvances
Namespace Prefix:	tu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The amount of funds advanced or contributed to joint venture excluding construction credit facilities.

No definition available.

Name:	tu_JointVentureFundsAdvancedOrContributedExcludingConstructionCreditFacilities
Namespace Prefix:	tu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The amount of funds repaid and earnings distributed by joint ventures.

No definition available.

Name:	tu_JointVentureFundsRepaidAndEarningsDistributed
Namespace Prefix:	tu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The net increase (decrease) of investment in real estate joint venture during period recorded on the statements of financial position of the real estate joint venture.

No definition available.

Name:	tu_JointVentureIncreaseDecrease
Namespace Prefix:	tu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The amount of receipts from a joint venture for finance costs.

No definition available.

Name:	tu_JointVentureReceiptsFromFinanceCost
Namespace Prefix:	tu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Pertains to real estate joint venture carrying amounts.

No definition available.