Share capital - Summary of Outstanding Common Shares (Details) - Common shares - CAD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Number of shares | ||
| Stated capital beginning of period | $ 20,860 | |
| Stated capital end of period | $ 21,493 | $ 20,860 |
| Issued capital | ||
| Number of shares | ||
| Number of shares beginning of period (in shares) | 912,283,103 | 912,274,545 |
| Shares issued for deferred plan (in shares) | 715 | 8,558 |
| Shares issued under dividend reinvestment plan (in shares) | 20,241,999 | 0 |
| Number of shares end of period (in shares) | 932,525,817 | 912,283,103 |
| Stated capital beginning of period | $ 20,860 | $ 20,859 |
| Shares issued under deferred share plan | 0 | 1 |
| Shares issued under dividend reinvestment plan | 633 | 0 |
| Stated capital end of period | $ 21,493 | $ 20,860 |