Income Taxes - Deferred Tax Assets and Liabilities Reflected on the Consolidated Statements of Financial Position (Details) - CAD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Taxes [Abstract]
Deferred tax assets	$ 5,884	$ 6,739
Deferred tax liabilities	(1,890)	(1,697)
Net deferred tax assets (liabilities)	$ 3,994	$ 5,042	$ 5,172

The amounts of income taxes recoverable in future periods in respect of: (a) deductible temporary differences; (b) the carryforward of unused tax losses; and (c) the carryforward of unused tax credits. [Refer: Temporary differences [member]; Unused tax credits [member]; Unused tax losses [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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