Securities - Summary of Non-Interest Revenue (Details) - CAD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Apr. 30, 2026 |
Apr. 30, 2025 |
Apr. 30, 2026 |
Apr. 30, 2025 |
|
| Disclosure of Securities [Abstract] | ||||
| FVTPL securities | $ 60 | $ 47 | $ 128 | $ 96 |
| FVOCI securities - net realized gains | 32 | 20 | 46 | 29 |
| Impairment on FVOCI and amortized cost securities | (6) | (1) | (3) | (1) |
| Securities gains, other than trading | $ 86 | $ 66 | $ 171 | $ 124 |