The amount of undrawn borrowing facilities that may be available for future operating activities and to settle capital commitments. [Refer: Capital commitments]

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 7
-IssueDate 2025-01-01
-Paragraph 50
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2025-en-r&anchor=para_50_a&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_UndrawnBorrowingFacilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The effective average interest rate on borrowings.

+ References

No definition available.

+ Details

Name:	tu_BorrowingsEffectiveWeightedAverageInterestRate
Namespace Prefix:	tu_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	tu_IfrsLettersOfCreditOutstandingAmount
Namespace Prefix:	tu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

No definition available.

+ Details

Name:	tu_IfrsLineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	tu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Non-revolving maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

No definition available.

+ Details

Name:	tu_LineOfCreditFacilityNonRevolvingMaximumBorrowingCapacity
Namespace Prefix:	tu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Total long-term borrowings, including the current and non-current portion.

+ References

No definition available.

+ Details

Name:	tu_LongTermBorrowingsCurrentAndNonCurrent
Namespace Prefix:	tu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the number of financial ratio tests defined in the agreement.

+ References

No definition available.

+ Details

Name:	tu_NumberOfFinancialRatioTests
Namespace Prefix:	tu_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Leverage ratio percentage, calculated by dividing net debt by operating cash flow.

+ References

No definition available.

+ Details

Name:	tu_RatioOfNetDebtToOperatingCashFlow
Namespace Prefix:	tu_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Ratio of operating cash flow divided by interest expense.

+ References

No definition available.

+ Details

Name:	tu_RatioOfOperatingCashFlowToInterestExpense
Namespace Prefix:	tu_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Pertains to the TELUS Corporation unsecured revolving bank credit facility.

+ References

No definition available.

+ Details

Name:	tu_TELUSCorporationCreditFacilityAbstract
Namespace Prefix:	tu_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	ifrs-full_BorrowingsByNameAxis=tu_TelusCorporationCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=tu_TelusCorporationUnsecuredRevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=tu_TelusCorporationCommercialPaperMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

long-term debt - TELUS Corporation credit facilities (Details) $ in Millions, $ in Billions	6 Months Ended
	Jun. 30, 2026 CAD ($) item	Jun. 30, 2026 USD ($) item	Dec. 31, 2025 CAD ($)	Dec. 31, 2025 USD ($)	Jun. 30, 2025 CAD ($)
TELUS Corporation credit facilities
Long-term debt	$ 30,231		$ 30,539		$ 32,194
TELUS Corporation credit facilities
TELUS Corporation credit facilities
Number of financial ratio tests \| item	2	2
Letters of credit outstanding	$ 61		67
TELUS Corporation credit facilities \| Maximum
TELUS Corporation credit facilities
Leverage ratio	4.25
TELUS Corporation credit facilities \| Minimum
TELUS Corporation credit facilities
Operating cash flow to interest expense ratio	2
TELUS Corporation unsecured revolving credit facility
TELUS Corporation credit facilities
Unsecured non-revolving bank credit facility	$ 650
Net available	657		1,798
Long-term debt	2,093		952
Gross available revolving credit facility	2,750		$ 2,750
TELUS Corporation commercial paper
TELUS Corporation credit facilities
Effective average interest rate			4.40%	4.40%
Long-term debt	2,100	$ 1.5	$ 1,000	$ 0.7
Gross available revolving credit facility	$ 2,100
TELUS Corporation commercial paper \| Maximum
TELUS Corporation credit facilities
Gross available revolving credit facility		$ 1.5