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RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - CHANGES IN LEVEL 3 (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Changes in net fair value of derivative assets and liabilities classified as Level 3 |  |
Level 3 net derivative asset at beginning of period | $ (11) | $ (387)
Total gains/(loss) |  |
Included in earnings | 27 | 206
Included in OCI | (25) | 2
Settlements | (60) | 168
Level 3 net derivative asset at end of period | (69) | (11)
Amount of transfer of fair value of assets between levels | 0 | 0
Amount of transfer of fair value of liabilities between levels | $ 0 | $ 0

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