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Securities (Summary of Equity Securities Designated at Fair Value Through Other Comprehensive Income) (Details) - CAD ($) $ in Millions | 12 Months Ended
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Oct. 31, 2025 | Oct. 31, 2024
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items] |  |
Fair value | $ 3,047 | $ 4,415
Dividend income recognized | 342 | 308
Common shares [member] |  |
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items] |  |
Fair value | 2,536 | 3,914
Dividend income recognized | 201 | 153
Preference shares [member] |  |
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items] |  |
Fair value | 511 | 501
Dividend income recognized | $ 141 | $ 155

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