Securities - Summary of Interest Income Calculated Using Effective Interest Method (Details) - CAD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Apr. 30, 2026 |
Apr. 30, 2025 |
Apr. 30, 2026 |
Apr. 30, 2025 |
|
| Disclosure Of interest, dividend and fee income [Line Items] | ||||
| Total | $ 1,533 | $ 1,740 | $ 3,107 | $ 3,642 |
| FVOCI securities | ||||
| Disclosure Of interest, dividend and fee income [Line Items] | ||||
| Total | 1,054 | 1,079 | 2,099 | 2,176 |
| Amortized cost securities | ||||
| Disclosure Of interest, dividend and fee income [Line Items] | ||||
| Total | $ 479 | $ 661 | $ 1,008 | $ 1,466 |