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IFRS 7 Disclosures - Summary of Account Balances by Investment Category (Detail) - CAD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Investment Categories For Variable Contracts With Guarantees [line items]    
Investments for variable contracts with guarantees $ 92,085 $ 111,037
Equity funds [Member]    
Investment Categories For Variable Contracts With Guarantees [line items]    
Investments for variable contracts with guarantees 42,506 52,528
Balanced funds [Member]    
Investment Categories For Variable Contracts With Guarantees [line items]    
Investments for variable contracts with guarantees 36,290 43,783
Bond funds [Member]    
Investment Categories For Variable Contracts With Guarantees [line items]    
Investments for variable contracts with guarantees 9,336 10,965
Money market funds [Member]    
Investment Categories For Variable Contracts With Guarantees [line items]    
Investments for variable contracts with guarantees 1,924 1,844
Other fixed interest rate investments [Member]    
Investment Categories For Variable Contracts With Guarantees [line items]    
Investments for variable contracts with guarantees $ 2,029 $ 1,917