Severance, acquisition and other costs (Details) - CAD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Analysis of income and expense [abstract] | ||||
| Severance | $ (46) | $ (14) | $ (48) | $ (245) |
| Acquisition and other | (4) | (27) | 4 | (43) |
| Total severance, acquisition and other costs | $ (50) | $ (41) | $ (44) | $ (288) |