Operating Segments - Schedule of Operating Segments (Parenthetical) (Detail) - CAD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Apr. 30, 2026 |
Jan. 31, 2026 |
Apr. 30, 2025 |
Apr. 30, 2026 |
Apr. 30, 2025 |
|
| Canadian banking [member] | |||||
| Disclosure of operating segments [line items] | |||||
| Net income from investments in associated corporations | $ (2) | $ (9) | $ (2) | $ (11) | $ 22 |
| International banking [member] | |||||
| Disclosure of operating segments [line items] | |||||
| Net income from investments in associated corporations | 65 | 48 | 38 | 113 | 73 |
| Other smaller operating segments and corporate adjustments [member] | |||||
| Disclosure of operating segments [line items] | |||||
| Net income from investments in associated corporations | $ 159 | $ 150 | $ 123 | $ 309 | $ 177 |