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Inventory - Schedule of Inventory (Details) - CAD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Inventories [Abstract]
Product inventory	$ 535	$ 390
Materials, supplies and other	1,013	670
Total inventory	$ 1,548	$ 1,060

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Current Raw Materials, Current Production Supplies And Other

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Inventories [Abstract]

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A classification of current inventory representing the amount of unrefined, unprocessed oil. [Refer: Inventories]

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The amount of current inventories. [Refer: Inventories]

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