Securities - Summary of Unrealized Gains and Losses on Securities at Fair Value through Other Comprehensive Income (Parenthetical) (Detail) - CAD ($) $ in Millions |
Oct. 31, 2024 |
Oct. 31, 2023 |
|---|---|---|
| Disclosure of financial assets [line items] | ||
| Amortized cost | $ 157,208 | $ 131,312 |
| Allowance for credit losses on debt securities at FVOCI | (35) | (33) |
| Held-to-collect securities category [member] | ||
| Disclosure of financial assets [line items] | ||
| Amortized cost | $ 100,258 | $ 91,113 |