v3.25.4
Insurance and Reinsurance Contract Assets and Liabilities - Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts Held by Measurement Components (Detail) - CAD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Insurance contracts issued      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities $ 540,344 $ 522,844 $ 481,994
Insurance contracts issued | Asia      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 200,488 180,536  
Insurance contracts issued | Canada      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 122,702 120,526  
Insurance contracts issued | U.S.      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 218,760 223,563  
Insurance contracts issued | Corporate and Other      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities (908) (903)  
Reinsurance contracts held      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 57,608 56,346  
Reinsurance contracts held | Asia      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 5,973 6,810  
Reinsurance contracts held | Canada      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 6,363 6,759  
Reinsurance contracts held | U.S.      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 45,534 43,030  
Reinsurance contracts held | Corporate and Other      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities (262) (253)  
Assets for insurance acquisition cash flows | Insurance contracts issued      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities (698) (878)  
Assets for insurance acquisition cash flows | Insurance contracts issued | Asia      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities (71) (290)  
Assets for insurance acquisition cash flows | Insurance contracts issued | Canada      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities (627) (588)  
Assets for insurance acquisition cash flows | Insurance contracts issued | U.S.      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 0 0  
Assets for insurance acquisition cash flows | Insurance contracts issued | Corporate and Other      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 0 0  
CSM, Fair value | Insurance contracts issued      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 17,929 19,007  
CSM, Fair value | Insurance contracts issued | Asia      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 10,892 11,338  
CSM, Fair value | Insurance contracts issued | Canada      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 3,306 3,986  
CSM, Fair value | Insurance contracts issued | U.S.      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 3,874 3,823  
CSM, Fair value | Insurance contracts issued | Corporate and Other      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities (143) (140)  
CSM, Fair value | Reinsurance contracts held      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 2,063 2,507  
CSM, Fair value | Reinsurance contracts held | Asia      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 687 627  
CSM, Fair value | Reinsurance contracts held | Canada      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities (193) 426  
CSM, Fair value | Reinsurance contracts held | U.S.      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 1,711 1,603  
CSM, Fair value | Reinsurance contracts held | Corporate and Other      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities (142) (149)  
CSM, Other | Insurance contracts issued      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 12,133 7,758  
CSM, Other | Insurance contracts issued | Asia      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 9,557 6,267  
CSM, Other | Insurance contracts issued | Canada      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 1,162 753  
CSM, Other | Insurance contracts issued | U.S.      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 1,414 738  
CSM, Other | Insurance contracts issued | Corporate and Other      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 0 0  
CSM, Other | Reinsurance contracts held      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 1,431 834  
CSM, Other | Reinsurance contracts held | Asia      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 414 141  
CSM, Other | Reinsurance contracts held | Canada      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 200 203  
CSM, Other | Reinsurance contracts held | U.S.      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 817 490  
CSM, Other | Reinsurance contracts held | Corporate and Other      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 0 0  
Total insurance contract liabilities (assets) | Insurance contracts issued      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 540,344 522,844  
Total insurance contract liabilities (assets) | Insurance contracts issued | Asia      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 200,417 180,246  
Total insurance contract liabilities (assets) | Insurance contracts issued | Canada      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 122,075 119,938  
Total insurance contract liabilities (assets) | Insurance contracts issued | U.S.      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 218,760 223,563  
Total insurance contract liabilities (assets) | Insurance contracts issued | Corporate and Other      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities (908) (903)  
PAA | Assets for insurance acquisition cash flows | Insurance contracts issued      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 473,715 460,761  
PAA | Assets for insurance acquisition cash flows | Insurance contracts issued | Asia      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 169,388 153,801  
PAA | Assets for insurance acquisition cash flows | Insurance contracts issued | Canada      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 102,070 100,296  
PAA | Assets for insurance acquisition cash flows | Insurance contracts issued | U.S.      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 203,209 207,665  
PAA | Assets for insurance acquisition cash flows | Insurance contracts issued | Corporate and Other      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities (952) (1,001)  
PAA | Assets for insurance acquisition cash flows | Reinsurance contracts held      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 47,623 46,967  
PAA | Assets for insurance acquisition cash flows | Reinsurance contracts held | Asia      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 3,282 4,462  
PAA | Assets for insurance acquisition cash flows | Reinsurance contracts held | Canada      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 4,471 4,308  
PAA | Assets for insurance acquisition cash flows | Reinsurance contracts held | U.S.      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 39,983 38,295  
PAA | Assets for insurance acquisition cash flows | Reinsurance contracts held | Corporate and Other      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities (113) (98)  
PAA | PAA Risk adjustment for non-financial risk | Insurance contracts issued      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 23,027 22,304  
PAA | PAA Risk adjustment for non-financial risk | Insurance contracts issued | Asia      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 9,352 7,630  
PAA | PAA Risk adjustment for non-financial risk | Insurance contracts issued | Canada      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 3,425 3,351  
PAA | PAA Risk adjustment for non-financial risk | Insurance contracts issued | U.S.      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 10,263 11,337  
PAA | PAA Risk adjustment for non-financial risk | Insurance contracts issued | Corporate and Other      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities (13) (14)  
PAA | PAA Risk adjustment for non-financial risk | Reinsurance contracts held      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 6,249 5,775  
PAA | PAA Risk adjustment for non-financial risk | Reinsurance contracts held | Asia      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 1,598 1,580  
PAA | PAA Risk adjustment for non-financial risk | Reinsurance contracts held | Canada      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 1,635 1,561  
PAA | PAA Risk adjustment for non-financial risk | Reinsurance contracts held | U.S.      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 3,023 2,641  
PAA | PAA Risk adjustment for non-financial risk | Reinsurance contracts held | Corporate and Other      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities (7) (7)  
Products not under PAA | Assets for insurance acquisition cash flows | Insurance contracts issued      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 13,446 13,201  
Products not under PAA | Assets for insurance acquisition cash flows | Insurance contracts issued | Asia      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 1,295 1,497  
Products not under PAA | Assets for insurance acquisition cash flows | Insurance contracts issued | Canada      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 11,951 11,452  
Products not under PAA | Assets for insurance acquisition cash flows | Insurance contracts issued | U.S.      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 0 0  
Products not under PAA | Assets for insurance acquisition cash flows | Insurance contracts issued | Corporate and Other      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 200 252  
Products not under PAA | Assets for insurance acquisition cash flows | Reinsurance contracts held      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 228 249  
Products not under PAA | Assets for insurance acquisition cash flows | Reinsurance contracts held | Asia      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities (8) 0  
Products not under PAA | Assets for insurance acquisition cash flows | Reinsurance contracts held | Canada      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 236 248  
Products not under PAA | Assets for insurance acquisition cash flows | Reinsurance contracts held | U.S.      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 0 0  
Products not under PAA | Assets for insurance acquisition cash flows | Reinsurance contracts held | Corporate and Other      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 0 1  
Products not under PAA | PAA Risk adjustment for non-financial risk | Insurance contracts issued      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 792 691  
Products not under PAA | PAA Risk adjustment for non-financial risk | Insurance contracts issued | Asia      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 4 3  
Products not under PAA | PAA Risk adjustment for non-financial risk | Insurance contracts issued | Canada      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 788 688  
Products not under PAA | PAA Risk adjustment for non-financial risk | Insurance contracts issued | U.S.      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 0 0  
Products not under PAA | PAA Risk adjustment for non-financial risk | Insurance contracts issued | Corporate and Other      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 0 0  
Products not under PAA | PAA Risk adjustment for non-financial risk | Reinsurance contracts held      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 14 14  
Products not under PAA | PAA Risk adjustment for non-financial risk | Reinsurance contracts held | Asia      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 0 0  
Products not under PAA | PAA Risk adjustment for non-financial risk | Reinsurance contracts held | Canada      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 14 13  
Products not under PAA | PAA Risk adjustment for non-financial risk | Reinsurance contracts held | U.S.      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities 0 1  
Products not under PAA | PAA Risk adjustment for non-financial risk | Reinsurance contracts held | Corporate and Other      
Disclosure of Detailed Information About Carrying Balances of Net Assets or Liabilities for Insurance Contracts Issued and Reinsurance Contracts held by Measurement Components [Line Items]      
Net insurance contract liabilities $ 0 $ 0