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Segregated Funds - Changes in Investment Contracts for Account of Segregated Fund Holders (Details) - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Insurance Contracts And Investment Contracts For Account Of Segregated Fund Holders [Roll Forward]    
Balance as at January 1 $ 23,139 $ 26,079
Deductions from segregated funds:    
Balance as at December 31 19,041 23,139
Investments for account of segregated fund holders    
Insurance Contracts And Investment Contracts For Account Of Segregated Fund Holders [Roll Forward]    
Balance as at January 1 102,153 113,917
Additions to segregated funds:    
Deposits 11,510 11,542
Net realized and unrealized gains (losses) 3,995 (15,359)
Other investment income 7,854 4,029
Total additions 23,359 212
Deductions from segregated funds:    
Payments to policyholders and their beneficiaries 10,793 11,049
Management fees 687 697
Taxes and other expenses 49 43
Foreign exchange rate movements (76) 187
Total deductions 11,453 11,976
Reinsurance And Investment Contract Liabilities, Net Additions (Deductions) 11,906 (11,764)
Dispositions (Note 3) (4,648) 0
Balance as at December 31 $ 109,411 $ 102,153