Loans, Impaired Loans, and Allowance for Credit Losses (Summary of Credit Quality) (Details) - CAD ($) $ in Millions |
Apr. 30, 2026 |
Oct. 31, 2025 |
Apr. 30, 2025 |
|---|---|---|---|
| Loans To Business And Government [Line Items] | |||
| Loans | $ 973,101 | $ 961,989 | |
| Allowance for loan losses | 8,419 | 8,689 | $ 8,613 |
| Total loans, net of allowance | 964,682 | 953,300 | |
| Business And Government [Member] | |||
| Loans To Business And Government [Line Items] | |||
| Loans at amortized cost | 357,237 | 345,943 | |
| Loans at FVOCI | 393 | 288 | |
| Loans | 357,630 | 346,231 | |
| Allowance for loan losses | 3,577 | 3,847 | |
| Total loans, net of allowance | $ 354,053 | $ 342,384 |