Securities (Summary of Equity Securities Designated at Fair Value Through Other Comprehensive Income) (Details) - CAD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Apr. 30, 2024 |
Apr. 30, 2023 |
Apr. 30, 2024 |
Apr. 30, 2023 |
Oct. 31, 2023 |
|
| Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items] | |||||
| Fair value | $ 3,696 | $ 3,696 | $ 3,513 | ||
| Dividend income recognized | 86 | $ 78 | 142 | $ 126 | |
| Common shares [member] | |||||
| Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items] | |||||
| Fair value | 3,224 | 3,224 | 3,170 | ||
| Dividend income recognized | 48 | 45 | 65 | 62 | |
| Preference shares [member] | |||||
| Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items] | |||||
| Fair value | 472 | 472 | $ 343 | ||
| Dividend income recognized | $ 38 | $ 33 | $ 77 | $ 64 | |