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Current and Future Changes in Accounting Policies (Narrative) (Details) - CAD ($) $ in Millions | Oct. 31, 2025 | Oct. 31, 2024
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Disclosure of initial application of standards or interpretations [line items] |  |
Deferred tax assets | $ 5,388 | $ 4,937
Retained earnings | 78,320 | 70,826
Accumulated other comprehensive income (loss) | $ 12,874 | $ 7,904

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