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RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - Fair Value of Derivatives (Details) - CAD ($) $ in Millions | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Fair Value of Derivatives |  |
Total net derivative asset/(liability) | $ (2,020) | $ (1,687)
Foreign exchange contracts |  |
Fair Value of Derivatives |  |
Total net derivative asset/(liability) | (1,241) | (1,102)
Interest rate contracts |  |
Fair Value of Derivatives |  |
Total net derivative asset/(liability) | (753) | (534)
Commodity contracts |  |
Fair Value of Derivatives |  |
Total net derivative asset/(liability) | (15) | (58)
Other contracts |  |
Fair Value of Derivatives |  |
Total net derivative asset/(liability) | (11) | 7
Recurring basis |  |
Fair Value of Derivatives |  |
Current derivative assets | 215 | 328
Long-term derivative assets | 300 | 101
Current derivative liabilities | (717) | (936)
Long-term derivative liabilities | (1,818) | (1,180)
Total net derivative asset/(liability) | (2,020) | (1,687)
Recurring basis | Foreign exchange contracts |  |
Fair Value of Derivatives |  |
Current derivative assets | 56 | 161
Long-term derivative assets | 226 | 81
Current derivative liabilities | (383) | (410)
Long-term derivative liabilities | (1,140) | (934)
Total net derivative asset/(liability) | (1,241) | (1,102)
Recurring basis | Interest rate contracts |  |
Fair Value of Derivatives |  |
Current derivative assets |  | 163
Long-term derivative assets | 8 |
Current derivative liabilities | (172) | (353)
Long-term derivative liabilities | (589) | (181)
Total net derivative asset/(liability) | (753) | (534)
Recurring basis | Commodity contracts |  |
Fair Value of Derivatives |  |
Current derivative assets | 159 | 4
Long-term derivative assets | 66 | 17
Current derivative liabilities | (160) | (173)
Long-term derivative liabilities | (80) | (65)
Total net derivative asset/(liability) | (15) | (58)
Recurring basis | Other contracts |  |
Fair Value of Derivatives |  |
Long-term derivative assets |  | 3
Current derivative liabilities | (2) |
Long-term derivative liabilities | (9) |
Total net derivative asset/(liability) | (11) | 7
Level 1 | Recurring basis |  |
Fair Value of Derivatives |  |
Current derivative assets | 16 | 0
Long-term derivative assets | 13 | 0
Current derivative liabilities | (16) | (5)
Long-term derivative liabilities | (11) | 0
Total net derivative asset/(liability) | 2 | (5)
Level 1 | Recurring basis | Foreign exchange contracts |  |
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
Level 1 | Recurring basis | Interest rate contracts |  |
Fair Value of Derivatives |  |
Current derivative assets |  | 0
Long-term derivative assets | 0 |
Current derivative liabilities | 0 | 0
Long-term derivative liabilities | 0 | 0
Total net derivative asset/(liability) | 0 | 0
Level 1 | Recurring basis | Commodity contracts |  |
Fair Value of Derivatives |  |
Current derivative assets | 16 | 0
Long-term derivative assets | 13 | 0
Current derivative liabilities | (16) | (5)
Long-term derivative liabilities | (11) | 0
Total net derivative asset/(liability) | 2 | (5)
Level 1 | Recurring basis | Other contracts |  |
Fair Value of Derivatives |  |
Long-term derivative assets |  | 0
Current derivative liabilities | 0 |
Long-term derivative liabilities | 0 |
Total net derivative asset/(liability) | 0 | 0
Level 2 | Recurring basis |  |
Fair Value of Derivatives |  |
Current derivative assets | 103 | 198
Long-term derivative assets | 281 | 96
Current derivative liabilities | (585) | (786)
Long-term derivative liabilities | (1,757) | (1,121)
Total net derivative asset/(liability) | (1,958) | (1,613)
Level 2 | Recurring basis | Foreign exchange contracts |  |
Fair Value of Derivatives |  |
Current derivative assets | 56 | 161
Long-term derivative assets | 226 | 81
Current derivative liabilities | (383) | (410)
Long-term derivative liabilities | (1,140) | (934)
Total net derivative asset/(liability) | (1,241) | (1,102)
Level 2 | Recurring basis | Interest rate contracts |  |
Fair Value of Derivatives |  |
Current derivative assets |  | 33
Long-term derivative assets | 8 |
Current derivative liabilities | (172) | (353)
Long-term derivative liabilities | (589) | (181)
Total net derivative asset/(liability) | (753) | (534)
Level 2 | Recurring basis | Commodity contracts |  |
Fair Value of Derivatives |  |
Current derivative assets | 47 | 4
Long-term derivative assets | 47 | 12
Current derivative liabilities | (28) | (23)
Long-term derivative liabilities | (19) | (6)
Total net derivative asset/(liability) | 47 | 16
Level 2 | Recurring basis | Other contracts |  |
Fair Value of Derivatives |  |
Long-term derivative assets |  | 3
Current derivative liabilities | (2) |
Long-term derivative liabilities | (9) |
Total net derivative asset/(liability) | (11) | 7
Level 3 | Recurring basis |  |
Fair Value of Derivatives |  |
Current derivative assets | 96 | 130
Long-term derivative assets | 6 | 5
Current derivative liabilities | (116) | (145)
Long-term derivative liabilities | (50) | (59)
Total net derivative asset/(liability) | (64) | (69)
Level 3 | Recurring basis | Foreign exchange contracts |  |
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
Level 3 | Recurring basis | Interest rate contracts |  |
Fair Value of Derivatives |  |
Current derivative assets |  | 130
Long-term derivative assets | 0 |
Current derivative liabilities | 0 | 0
Long-term derivative liabilities | 0 | 0
Total net derivative asset/(liability) | 0 | 0
Level 3 | Recurring basis | Commodity contracts |  |
Fair Value of Derivatives |  |
Current derivative assets | 96 | 0
Long-term derivative assets | 6 | 5
Current derivative liabilities | (116) | (145)
Long-term derivative liabilities | (50) | (59)
Total net derivative asset/(liability) | (64) | (69)
Level 3 | Recurring basis | Other contracts |  |
Fair Value of Derivatives |  |
Long-term derivative assets |  | 0
Current derivative liabilities | 0 |
Long-term derivative liabilities | 0 |
Total net derivative asset/(liability) | $ 0 | $ 0

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