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Financial and capital management - Fair Value Details of Financial Instruments Measured at Amortized Cost (Details) - Financial liabilities at amortised cost, category - Debt securities and other debt - CAD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure of financial liabilities [line items]    
Carrying value $ 31,247 $ 29,049
Fair value $ 30,885 $ 28,225