Share-based payments - Changes in Outstanding ELTIP and EDIP Awards (Details) - USD ($) shares in Thousands, $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| EDIP | Time vesting shares | |||
| Changes in Outstanding ELTIP and EDIP Awards | |||
| Outstanding at beginning of year (in shares) | 628 | 665 | 621 |
| Granted (in shares) | 135 | 105 | 199 |
| Vested (in shares) | (263) | (139) | (155) |
| Forfeitures and cancellations (in shares) | 0 | (3) | 0 |
| Outstanding at end of year (in shares) | 500 | 628 | 665 |
| ELTIP | Time vesting and performance vesting shares | |||
| Changes in Outstanding ELTIP and EDIP Awards | |||
| Outstanding at beginning of year (in shares) | 1,151 | 915 | 705 |
| Granted (in shares) | 361 | 573 | 395 |
| Vested (in shares) | (274) | (333) | (185) |
| Forfeitures and cancellations (in shares) | (2) | (4) | 0 |
| Outstanding at end of year (in shares) | 1,236 | 1,151 | 915 |
| EDIP and ELTIP | |||
| Changes in Outstanding ELTIP and EDIP Awards | |||
| Fair value of awards vested | $ 22.4 | $ 14.2 | $ 11.2 |