SUPPLEMENTAL CASH FLOW INFORMATION - Schedule of Changes in Non-Cash Working Capital (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Cash Flow Statement [Abstract] | ||||
| Accounts receivable | $ 11 | $ (17) | $ 86 | $ (22) |
| Accounts payable and other | 146 | 151 | (91) | 30 |
| Changes in non-cash working capital, net | $ 157 | $ 134 | $ (5) | $ 8 |