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, 2026 |
Apr. 30, 2025 |
Apr. 30, 2026 |
Apr. 30, 2025 |
Oct. 31, 2025 |
|
| Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items] | |||||
| Fair value | $ 3,335 | $ 3,335 | $ 3,047 | ||
| Dividend income recognized | 61 | $ 123 | 117 | $ 189 | |
| Common shares [member] | |||||
| Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items] | |||||
| Fair value | 2,624 | 2,624 | 2,536 | ||
| Dividend income recognized | 32 | 88 | 52 | 115 | |
| Preference shares [member] | |||||
| Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items] | |||||
| Fair value | 711 | 711 | $ 511 | ||
| Dividend income recognized | $ 29 | $ 35 | $ 65 | $ 74 | |