Leases - Narrative (Details) - CAD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Disclosure of leases [Abstract]
Cash outflow for leases	$ 1,537	$ 1,567
Repayments of lease liabilities	$ 1,127	$ 1,142

The cash outflow for leases.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2025-01-01
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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
-Note Effective 2027-01-01
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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