XML 175 R132.htm IDEA: XBRL DOCUMENT v3.25.3
Insurance - Summary of Sensitivity Analysis to Changes in Risk Exposures that Arise from Contracts Within Scope of IFRS 17 (Detail) - CAD ($)
$ in Millions
 12 Months Ended
Oct. 31, 2025
Oct. 31, 2024
Disclosure of sensitivity analysis to changes in risk variables that arise from contracts within scope of IFRS 17 [line items]    
50 basis point increase $ 2 $ 6
50 basis point decrease (6) (9)
10% Increase 6 28
10% Decrease $ (7) $ (26)