revenue from contracts with customers - Revenues (Details) - Minimum - CAD ($) $ in Millions |
Jun. 30, 2024 |
Dec. 31, 2023 |
|---|---|---|
| Disclosure of transaction price allocated to remaining performance obligations | ||
| Transaction price allocated to remaining performance obligations | $ 3,331 | $ 3,705 |
| The 12-month period ending one year hence | ||
| Disclosure of transaction price allocated to remaining performance obligations | ||
| Transaction price allocated to remaining performance obligations | 2,375 | 2,576 |
| The 12-month period ending two years hence | ||
| Disclosure of transaction price allocated to remaining performance obligations | ||
| Transaction price allocated to remaining performance obligations | 851 | 1,022 |
| Thereafter | ||
| Disclosure of transaction price allocated to remaining performance obligations | ||
| Transaction price allocated to remaining performance obligations | $ 105 | $ 107 |