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Investments - Inter Pipeline (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of financial assets [line items]
(Gain) loss from investment	$ 171	$ 293	$ 346
Investment in Inter Pipeline Ltd.
Disclosure of financial assets [line items]
Fair value loss (gain) from Inter Pipeline	68	(21)	43
Dividend income from Inter Pipeline	(5)	(11)	(11)
(Gain) loss from investment	$ 63	$ (32)	$ 32

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The gains (losses) on financial assets at fair value through profit or loss. [Refer: Financial assets at fair value through profit or loss]

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The amount of dividends recognised as income. Dividends are distributions of profits to holders of equity investments in proportion to their holdings of a particular class of capital.

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