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Share Capital - Schedule of Regulatory Capital and Ratios (Detail) - CAD ($)
$ in Millions
Jul. 31, 2025
Oct. 31, 2024
Disclosure of Basel III captial disclosure [line items]    
Common Equity Tier 1 (CET1) capital $ 46,616 $ 44,516
Tier 1 capital 53,303 49,481
Total capital 61,338 56,809
Total risk-weighted assets (RWA) $ 347,712 $ 333,502
CET1 ratio 13.40% 13.30%
Tier 1 capital ratio 15.30% 14.80%
Total capital ratio 17.60% 17.00%
Leverage ratio exposure $ 1,244,201 $ 1,155,432
Leverage ratio 4.30% 4.30%
TLAC available $ 114,311 $ 101,062
TLAC ratio 32.90% 30.30%
TLAC leverage ratio 9.20% 8.70%