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Inventories (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Inventories |  |
Crude oil | $ 1,177.0 | $ 1,203.0
Refined products | 1,033.0 | 1,268.0
Materials, supplies and merchandise | 702.0 | 664.0
Energy trading commodity inventories | 247.0 | 333.0
Total current inventories | 3,159.0 | 3,468.0
Write-downs (reversals of write-downs) of inventories |  |
Product inventory expensed | 14,800.0 | 11,600.0
Crude oil inventory write-down | 0.0 | 0.0
Materials, supplies and merchandise inventory write-down | $ 0.0 | $ 0.0

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