Share-based incentive compensation programs - Summarized Information About Incentive Share, Deferred Share and Restricted Stock Units (Detail) |
12 Months Ended |
|---|---|
|
Dec. 31, 2025
shares
| |
| Restricted Stock Units | |
| Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] | |
| Outstanding at beginning of period | 4,223,070 |
| Granted | 918,900 |
| Vested/Exercised | (717,310) |
| Forfeited and cancelled | (42,620) |
| Outstanding at end of period | 4,382,040 |
| Deferred Share Units | |
| Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] | |
| Outstanding at beginning of period | 44,706 |
| Granted | 6,393 |
| Vested/Exercised | 0 |
| Forfeited and cancelled | 0 |
| Outstanding at end of period | 51,099 |