Securities - Summary of Interest Income Calculated Using Effective Interest Method (Details) - CAD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jul. 31, 2026 |
Jul. 31, 2025 |
Jul. 31, 2026 |
Jul. 31, 2025 |
|
| Disclosure Of interest, dividend and fee income [Line Items] | ||||
| Total | $ 1,667 | $ 1,752 | $ 4,774 | $ 5,394 |
| FVOCI securities | ||||
| Disclosure Of interest, dividend and fee income [Line Items] | ||||
| Total | 1,144 | 1,128 | 3,243 | 3,304 |
| Amortized cost securities | ||||
| Disclosure Of interest, dividend and fee income [Line Items] | ||||
| Total | $ 523 | $ 624 | $ 1,531 | $ 2,090 |