Loans, Impaired Loans, and Allowance for Credit Losses (Summary of Credit Quality) (Details) - CAD ($) $ in Millions |
Apr. 30, 2024 |
Oct. 31, 2023 |
|---|---|---|
| Loans To Business And Government [Line Items] | ||
| Customers' liability under acceptances | $ 4,183 | $ 17,569 |
| Business and government [member] | ||
| Loans To Business And Government [Line Items] | ||
| Loans at amortized cost | 349,019 | 326,528 |
| Customers' liability under acceptances | 4,183 | 17,569 |
| Loans at FVOCI | 206 | 421 |
| Loans and acceptances | 353,408 | 344,518 |
| Allowance for loan losses | 3,125 | 2,990 |
| Loans and acceptances, net of allowance | $ 350,283 | $ 341,528 |