Provision for de-characterization of dam structures and asset retirement obligations (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Provision For De-characterization Of Dam Structures And Asset Retirement Obligations | ||||
| De-characterization of upstream geotechnical structures | $ 56 | $ 70 | $ 65 | $ 131 |
| Obligation for asset decommissioning | (4) | 19 | (12) | 32 |
| Environmental obligations | (22) | |||
| Total | $ 52 | $ 89 | $ 53 | $ 141 |