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Inventory - Components of Inventory (Details) - CAD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of inventories [Abstract]
Parts, materials and supplies	$ 72	$ 83
Coal	38	43
Emission credits	45	27
Natural gas	2	4
Total	$ 157	$ 157

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A classification of current inventory representing the amount of fuel. [Refer: Inventories]

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A classification of current inventory representing the amount of a naturally occurring hydrocarbon gas mixture. [Refer: Inventories]

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