Long-term debt - Credit facility (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
TELUS Corporation
Long-term debt maturities
Available	$ 716.0	$ 132.0
Credit facility
Long-term debt maturities
Available	716.0	132.0
Outstanding	941.0	1,568.0
Maximum aggregate amount of credit facility	1,657.0	1,700.0
Credit facility \| TELUS Corporation
Long-term debt maturities
Outstanding	87.0	140.0
Credit facility \| Other lenders
Long-term debt maturities
Outstanding	854.0	1,428.0
Revolving component
Long-term debt maturities
Available	716.0	132.0
Outstanding	134.0	718.0
Maximum aggregate amount of credit facility	850.0	850.0
Revolving component \| TELUS Corporation
Long-term debt maturities
Outstanding	16.0	65.0
Revolving component \| Other lenders
Long-term debt maturities
Outstanding	118.0	653.0
Term loan components
Long-term debt maturities
Outstanding	807.0	850.0
Maximum aggregate amount of credit facility	$ 807.0	850.0
Fixed interest rate	2.64%
Term loan components \| TELUS Corporation
Long-term debt maturities
Outstanding	$ 71.0	75.0
Term loan components \| Other lenders
Long-term debt maturities
Outstanding	$ 736.0	$ 775.0

The interest rate on borrowings. [Refer: Borrowings]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

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

+ References

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- Definition

Borrowings that are outstanding at the reporting date, excluding unamortized costs.

+ References

No definition available.

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- 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.

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