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Inventory (Details) - CAD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
14. Inventory
Fuel	$ 199	$ 232
Raw Materials	254	235
Inventory Total	$ 453	$ 467

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Carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies relating to a source of usable power held for future sale or future use in manufacturing or production process.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of unprocessed items to be consumed in the manufacturing or production process.

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