v3.25.4
Insurance and Reinsurance Contract Assets and Liabilities - Insurance Revenue By Transition Method (Detail) - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of analysis of insurance revenue [line items]    
Insurance revenue $ 28,888 $ 26,592
Asia    
Disclosure of analysis of insurance revenue [line items]    
Insurance revenue 6,965 5,809
Canada    
Disclosure of analysis of insurance revenue [line items]    
Insurance revenue 9,825 9,296
U.S.    
Disclosure of analysis of insurance revenue [line items]    
Insurance revenue 12,012 11,403
Corporate and Other    
Disclosure of analysis of insurance revenue [line items]    
Insurance revenue 86 84
Contracts under the fair value method    
Disclosure of analysis of insurance revenue [line items]    
Insurance revenue 17,419 16,912
Contracts under the fair value method | Asia    
Disclosure of analysis of insurance revenue [line items]    
Insurance revenue 2,666 2,629
Contracts under the fair value method | Canada    
Disclosure of analysis of insurance revenue [line items]    
Insurance revenue 3,343 3,322
Contracts under the fair value method | U.S.    
Disclosure of analysis of insurance revenue [line items]    
Insurance revenue 11,424 10,975
Contracts under the fair value method | Corporate and Other    
Disclosure of analysis of insurance revenue [line items]    
Insurance revenue (14) (14)
Contracts under the full retrospective method    
Disclosure of analysis of insurance revenue [line items]    
Insurance revenue 710 692
Contracts under the full retrospective method | Asia    
Disclosure of analysis of insurance revenue [line items]    
Insurance revenue 490 489
Contracts under the full retrospective method | Canada    
Disclosure of analysis of insurance revenue [line items]    
Insurance revenue 62 62
Contracts under the full retrospective method | U.S.    
Disclosure of analysis of insurance revenue [line items]    
Insurance revenue 158 141
Contracts under the full retrospective method | Corporate and Other    
Disclosure of analysis of insurance revenue [line items]    
Insurance revenue 0 0
Other contracts    
Disclosure of analysis of insurance revenue [line items]    
Insurance revenue 10,759 8,988
Other contracts | Asia    
Disclosure of analysis of insurance revenue [line items]    
Insurance revenue 3,809 2,691
Other contracts | Canada    
Disclosure of analysis of insurance revenue [line items]    
Insurance revenue 6,420 5,912
Other contracts | U.S.    
Disclosure of analysis of insurance revenue [line items]    
Insurance revenue 430 287
Other contracts | Corporate and Other    
Disclosure of analysis of insurance revenue [line items]    
Insurance revenue $ 100 $ 98