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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, 2022
Dec. 31, 2021
Disclosure of financial liabilities [line items]    
CARRYING VALUE $ 25,061 $ 23,729
FAIR VALUE $ 23,026 $ 26,354