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RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Schedule of Derivative Assets and Liabilities Measured at Fair Value (Details) - CAD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Fair Value of Derivatives |  |
Total net derivative asset/(liability) | $ (926) | $ (2,250)
Fair Value |  |
Fair Value of Derivatives |  |
Current derivative assets | 456 | 557
Long-term derivative assets | 308 | 426
Current derivative liabilities | (768) | (1,335)
Long-term derivative liabilities | (922) | (1,898)
Total net derivative asset/(liability) | (926) | (2,250)
Level 1 | Fair Value |  |
Fair Value of Derivatives |  |
Current derivative assets | 65 | 34
Long-term derivative assets | 2 | 1
Current derivative liabilities | (79) | (52)
Long-term derivative liabilities | (8) | (1)
Total net derivative asset/(liability) | (20) | (18)
Level 2 | Fair Value |  |
Fair Value of Derivatives |  |
Current derivative assets | 137 | 267
Long-term derivative assets | 206 | 243
Current derivative liabilities | (443) | (1,000)
Long-term derivative liabilities | (823) | (1,690)
Total net derivative asset/(liability) | (923) | (2,180)
Level 3 |  |
Fair Value of Derivatives |  |
Total net derivative asset/(liability) | 17 |
Level 3 | Fair Value |  |
Fair Value of Derivatives |  |
Current derivative assets | 254 | 256
Long-term derivative assets | 100 | 182
Current derivative liabilities | (246) | (283)
Long-term derivative liabilities | (91) | (207)
Total net derivative asset/(liability) | 17 | (52)
Foreign exchange contracts |  |
Fair Value of Derivatives |  |
Total net derivative asset/(liability) | (947) | (2,175)
Foreign exchange contracts | Fair Value |  |
Fair Value of Derivatives |  |
Current derivative assets | 33 | 125
Long-term derivative assets | 75 | 83
Current derivative liabilities | (721) | (804)
Long-term derivative liabilities | (334) | (1,579)
Total net derivative asset/(liability) | (947) | (2,175)
Foreign exchange contracts | Level 1 | Fair Value |  |
Fair Value of Derivatives |  |
Current derivative assets | 0 | 0
Long-term derivative assets | 0 | 0
Current derivative liabilities | 0 | 0
Long-term derivative liabilities | 0 | 0
Total net derivative asset/(liability) | 0 | 0
Foreign exchange contracts | Level 2 | Fair Value |  |
Fair Value of Derivatives |  |
Current derivative assets | 33 | 125
Long-term derivative assets | 75 | 83
Current derivative liabilities | (721) | (804)
Long-term derivative liabilities | (334) | (1,579)
Total net derivative asset/(liability) | (947) | (2,175)
Foreign exchange contracts | Level 3 | Fair Value |  |
Fair Value of Derivatives |  |
Current derivative assets | 0 | 0
Long-term derivative assets | 0 | 0
Current derivative liabilities | 0 | 0
Long-term derivative liabilities | 0 | 0
Total net derivative asset/(liability) | 0 | 0
Interest rate contracts |  |
Fair Value of Derivatives |  |
Total net derivative asset/(liability) | 32 | 53
Interest rate contracts | Fair Value |  |
Fair Value of Derivatives |  |
Current derivative assets | 32 | 67
Long-term derivative assets | 117 | 146
Current derivative liabilities | (38) | (80)
Long-term derivative liabilities | (79) | (80)
Total net derivative asset/(liability) | 32 | 53
Interest rate contracts | Level 1 | Fair Value |  |
Fair Value of Derivatives |  |
Current derivative assets | 0 | 0
Long-term derivative assets | 0 | 0
Current derivative liabilities | 0 | 0
Long-term derivative liabilities | 0 | 0
Total net derivative asset/(liability) |  | 0
Interest rate contracts | Level 2 | Fair Value |  |
Fair Value of Derivatives |  |
Current derivative assets | 32 | 67
Long-term derivative assets | 117 | 146
Current derivative liabilities | (38) | (80)
Long-term derivative liabilities | (79) | (80)
Total net derivative asset/(liability) | 32 | 53
Interest rate contracts | Level 3 | Fair Value |  |
Fair Value of Derivatives |  |
Current derivative assets | 0 | 0
Long-term derivative assets | 0 | 0
Current derivative liabilities | 0 | 0
Long-term derivative liabilities | 0 | 0
Total net derivative asset/(liability) |  | 0
Commodity contracts |  |
Fair Value of Derivatives |  |
Total net derivative asset/(liability) | (11) | (131)
Commodity contracts | Fair Value |  |
Fair Value of Derivatives |  |
Current derivative assets | 391 | 362
Long-term derivative assets | 116 | 197
Current derivative liabilities | (396) | (451)
Long-term derivative liabilities | (122) | (239)
Total net derivative asset/(liability) | (11) | (131)
Commodity contracts | Level 1 | Fair Value |  |
Fair Value of Derivatives |  |
Current derivative assets | 65 | 34
Long-term derivative assets | 2 | 1
Current derivative liabilities | (79) | (52)
Long-term derivative liabilities | (8) | (1)
Total net derivative asset/(liability) | (20) | (18)
Commodity contracts | Level 2 | Fair Value |  |
Fair Value of Derivatives |  |
Current derivative assets | 72 | 72
Long-term derivative assets | 14 | 14
Current derivative liabilities | (71) | (116)
Long-term derivative liabilities | (23) | (31)
Total net derivative asset/(liability) | (8) | (61)
Commodity contracts | Level 3 | Fair Value |  |
Fair Value of Derivatives |  |
Current derivative assets | 254 | 256
Long-term derivative assets | 100 | 182
Current derivative liabilities | (246) | (283)
Long-term derivative liabilities | (91) | (207)
Total net derivative asset/(liability) | $ 17 | (52)
Other contracts |  |
Fair Value of Derivatives |  |
Total net derivative asset/(liability) |  | 3
Other contracts | Fair Value |  |
Fair Value of Derivatives |  |
Current derivative assets |  | 3
Total net derivative asset/(liability) |  | 3
Other contracts | Level 1 | Fair Value |  |
Fair Value of Derivatives |  |
Current derivative assets |  | 0
Total net derivative asset/(liability) |  | 0
Other contracts | Level 2 | Fair Value |  |
Fair Value of Derivatives |  |
Current derivative assets |  | 3
Total net derivative asset/(liability) |  | 3
Other contracts | Level 3 | Fair Value |  |
Fair Value of Derivatives |  |
Current derivative assets |  | 0
Total net derivative asset/(liability) |  | $ 0

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