v3.25.4
Derivative and Hedging Instruments - Investment Income (Loss) on Derivatives Not Designated in Qualifying Hedge Accounting Relationships (Details) - Derivatives not designated in qualifying hedge accounting relationships - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of detailed information about hedging instruments [line items]    
Derivative investment income (loss) $ 133 $ (726)
Interest rate swaps    
Disclosure of detailed information about hedging instruments [line items]    
Derivative investment income (loss) 4 (116)
Interest rate futures    
Disclosure of detailed information about hedging instruments [line items]    
Derivative investment income (loss) 114 52
Interest rate options    
Disclosure of detailed information about hedging instruments [line items]    
Derivative investment income (loss) (9) (20)
Foreign currency swaps    
Disclosure of detailed information about hedging instruments [line items]    
Derivative investment income (loss) 144 108
Currency rate futures    
Disclosure of detailed information about hedging instruments [line items]    
Derivative investment income (loss) 15 (137)
Forward contracts    
Disclosure of detailed information about hedging instruments [line items]    
Derivative investment income (loss) (423) (626)
Equity futures    
Disclosure of detailed information about hedging instruments [line items]    
Derivative investment income (loss) (477) (423)
Equity contracts    
Disclosure of detailed information about hedging instruments [line items]    
Derivative investment income (loss) 766 437
Derivatives not designated in qualifying hedge accounting relationships | Credit default swaps    
Disclosure of detailed information about hedging instruments [line items]    
Derivative investment income (loss) $ (1) $ (1)