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Financial assets and liabilities - Financial Instruments Measured at Amortized Cost (Details) - Financial liabilities at amortised cost, category - Debt securities and other debt - CAD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Disclosure of financial liabilities [line items]    
Carrying value $ 33,581 $ 31,236
Fair value $ 33,837 $ 31,286