DIVESTITURE (Details) - CAD ($) $ in Millions |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Aug. 01, 2026 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Disclosure of analysis of single amount of discontinued operations [line items] | |||||
| Gains (losses) on divestiture of assets | $ (96) | $ (106) | $ (186) | $ (109) | |
| Canadian Refining Segment | |||||
| Disclosure of analysis of single amount of discontinued operations [line items] | |||||
| Gains (losses) on divestiture of assets | $ 89 | ||||
| Canadian Refining Segment | |||||
| Disclosure of analysis of single amount of discontinued operations [line items] | |||||
| Proceeds from disposal of oil and gas assets | $ 260 | ||||