financial instruments - Credit risk (Details) - CAD ($) $ in Millions |
Jun. 30, 2024 |
Dec. 31, 2023 |
|---|---|---|
| Credit risk | ||
| Maximum exposure (excluding income tax effects) to credit risk | $ 5,853 | $ 6,061 |
| Cash and temporary investments, net | ||
| Credit risk | ||
| Maximum exposure (excluding income tax effects) to credit risk | 927 | 864 |
| Accounts receivable | ||
| Credit risk | ||
| Maximum exposure (excluding income tax effects) to credit risk | 4,069 | 4,234 |
| Contract assets | ||
| Credit risk | ||
| Maximum exposure (excluding income tax effects) to credit risk | 701 | 748 |
| Derivative assets | ||
| Credit risk | ||
| Maximum exposure (excluding income tax effects) to credit risk | $ 156 | $ 215 |