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Risk Management - Concentration Risk (Details) - CAD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure of credit risk exposure [line items]    
Concentration risk of liabilities $ 787,436 $ 716,962
U.S. and Canada    
Disclosure of credit risk exposure [line items]    
Concentration risk of liabilities 595,654 548,424
Asia and Other    
Disclosure of credit risk exposure [line items]    
Concentration risk of liabilities 191,782 168,538
Insurance contract liabilities    
Disclosure of credit risk exposure [line items]    
Concentration risk of liabilities 522,844 481,994
Insurance contract liabilities | U.S. and Canada    
Disclosure of credit risk exposure [line items]    
Concentration risk of liabilities 342,146 327,458
Insurance contract liabilities | Asia and Other    
Disclosure of credit risk exposure [line items]    
Concentration risk of liabilities 180,698 154,536
Investment contract liabilities    
Disclosure of credit risk exposure [line items]    
Concentration risk of liabilities 322,941 275,217
Investment contract liabilities | U.S. and Canada    
Disclosure of credit risk exposure [line items]    
Concentration risk of liabilities 305,563 260,046
Investment contract liabilities | Asia and Other    
Disclosure of credit risk exposure [line items]    
Concentration risk of liabilities 17,378 15,171
Reinsurance assets    
Disclosure of credit risk exposure [line items]    
Concentration risk of liabilities 58,349 40,249
Reinsurance assets | U.S. and Canada    
Disclosure of credit risk exposure [line items]    
Concentration risk of liabilities (52,055) (39,080)
Reinsurance assets | Asia and Other    
Disclosure of credit risk exposure [line items]    
Concentration risk of liabilities $ (6,294) $ (1,169)