v3.25.4
Derivative and Hedging Instruments - Hedges of Net Investments in Foreign Operations (Details) - Net investment hedges - CAD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of detailed information about hedging instruments [line items]    
Change in value of the hedged item for ineffectiveness measurement $ (361) $ 620
Change in value of the hedging instrument for ineffectiveness measurement 361 (620)
Gains (losses) deferred in AOCI on derivatives 361 (620)
Gains (losses) reclassified from AOCI into Total investment result 0 0
Ineffectiveness recognized in Total investment result 0 0
Non-functional currency denominated debt    
Disclosure of detailed information about hedging instruments [line items]    
Change in value of the hedged item for ineffectiveness measurement (368) 665
Change in value of the hedging instrument for ineffectiveness measurement 368 (665)
Gains (losses) deferred in AOCI on derivatives 368 (665)
Gains (losses) reclassified from AOCI into Total investment result 0 0
Ineffectiveness recognized in Total investment result 0 0
Forward contracts    
Disclosure of detailed information about hedging instruments [line items]    
Change in value of the hedged item for ineffectiveness measurement 7 (45)
Change in value of the hedging instrument for ineffectiveness measurement (7) 45
Gains (losses) deferred in AOCI on derivatives (7) 45
Gains (losses) reclassified from AOCI into Total investment result 0 0
Ineffectiveness recognized in Total investment result $ 0 $ 0