Securities (Summary of Equity Securities Designated at Fair Value Through Other Comprehensive Income) (Details) - CAD ($) $ in Millions |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Jul. 31, 2026 |
Jul. 31, 2025 |
Jul. 31, 2026 |
Jul. 31, 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 | $ 3,764 | $ 3,764 | $ 3,047 | ||
| Dividend income recognized | 70 | $ 86 | 187 | $ 275 | |
| Common shares [member] | |||||
| Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items] | |||||
| Fair value | 2,975 | 2,975 | 2,536 | ||
| Dividend income recognized | 34 | 52 | 86 | 167 | |
| Preference shares [member] | |||||
| Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items] | |||||
| Fair value | 789 | 789 | $ 511 | ||
| Dividend income recognized | $ 36 | $ 34 | $ 101 | $ 108 | |