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Investment Contract Liabilities - Summary of Investment Contract Liabilities Measured at Amortized Cost and Fair Value Associated with Contracts (Parenthetical) (Detail) - CAD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Jan. 01, 2022
Disclosure of Investment Contract Liabilities [line items]      
Investment contract liabilities reinsured $ 2,831 $ 2,391 $ 2,079
Investment contract liabilities 11,816 10,079 $ 10,064
Carrying amount [member]      
Disclosure of Investment Contract Liabilities [line items]      
Investment contract liabilities reinsured 27 38  
Investment contract liabilities 11,040 9,243  
Fair value [Member]      
Disclosure of Investment Contract Liabilities [line items]      
Investment contract liabilities reinsured 27 38  
Investment contract liabilities $ 10,967 $ 8,996