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INVENTORIES (Details) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
INVENTORIES |  |
Crude oil | $ 1,501 | $ 1,429
Refined products | 1,820 | 1,322
Energy trading commodity inventories | 789 | 866
Total current inventories | 4,110 | 3,617
Write-downs (reversals of write-downs) of inventories |  |
Crude oil held for trading purpose | 110 | 154
Product inventory expensed | $ 14,700 | $ 9,400

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