Goodwill (Details) - CAD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Goodwill
Opening balance	$ 17,729	$ 344
Addition	67	17,565
Foreign exchange impact	1,554	(180)
Ending balance	$ 19,350	$ 17,729

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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+ Details