Employee future benefits (Details) $ in Millions |
12 Months Ended | |||||
|---|---|---|---|---|---|---|
|
Dec. 31, 2023
USD ($)
|
Dec. 31, 2023
CAD ($)
|
Dec. 31, 2022
USD ($)
|
Dec. 31, 2022
CAD ($)
|
Dec. 31, 2021
USD ($)
|
Dec. 31, 2021
CAD ($)
|
|
| Defined contribution pension plans | ||||||
| Matching contribution to employees' 5% contribution (in percent) | 100.00% | 100.00% | ||||
| Defined benefit pension expense | $ 9 | $ 9 | $ 7 | |||
| Obligation for defined benefit pension plans | 14 | 9 | 11 | |||
| Pension plans | ||||||
| Defined contribution pension plans | ||||||
| Defined benefit pension expense | 2 | 0 | 1 | |||
| TELUS Corporation (parent) | ||||||
| Defined contribution pension plans | ||||||
| Defined benefit pension expense | $ 2,000,000 | $ 2,000,000 | $ 0 | |||
| TELUS Corporation (parent) | Pension plans | ||||||
| Defined contribution pension plans | ||||||
| Defined benefit pension expense | $ 2 | $ 2 | $ 1 | |||