DERIVATIVE INSTRUMENTS - Schedule of Losses (Gains) on Derivatives (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Derivative contracts | ||||
| Loss (gain) on cash flow hedges | $ (18) | $ 16 | $ (33) | $ 42 |
| Foreign currency cash flow hedges | ||||
| Derivative contracts | ||||
| Loss (gain) on cash flow hedges | (20) | 12 | (38) | 34 |
| Gain (loss) to be reclassified within 12 months | 39 | |||
| Cadia PPA cash flow hedge | ||||
| Derivative contracts | ||||
| Loss (gain) on cash flow hedges | 2 | 2 | 3 | 5 |
| Gain (loss) to be reclassified within 12 months | $ (10) | |||
| Derivative, term (in years) | 15 years | |||
| Interest rate contracts | ||||
| Derivative contracts | ||||
| Loss (gain) on cash flow hedges | $ 0 | $ 2 | $ 2 | $ 3 |
| Gain (loss) to be reclassified within 12 months | $ (3) | |||