Securities - Summary of Securities (Detail) - CAD ($) $ in Millions |
Jan. 31, 2023 |
Oct. 31, 2022 |
|---|---|---|
| Disclosure of detailed information about financial instruments [abstract] | ||
| Securities measured and designated at FVOCI | $ 57,672 | $ 56,099 |
| Securities measured at amortized cost | 59,971 | 52,484 |
| Securities mandatorily measured and designated at FVTPL | 69,707 | 67,296 |
| Total financial securities | $ 187,350 | $ 175,879 |