Share-based payments - Share-based Payment Amounts Included in the Income Statements as Operating Costs (Details) - CAD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] | ||
| Total share-based payments | $ (90) | $ (84) |
| RSUs and PSUs | ||
| Disclosure of terms and conditions of share-based payment arrangement [line items] | ||
| Total share-based payments | (61) | (52) |
| ESP and DSUs | ||
| Disclosure of terms and conditions of share-based payment arrangement [line items] | ||
| Total share-based payments | $ (29) | $ (32) |