Cash and Deposits with Financial Institutions - Summary of Cash and Deposits with Financial Institutions (Parenthetical) (Detail) - CAD ($) $ in Millions	Jan. 31, 2026	Oct. 31, 2025
Cash and Deposits with Financial Institutions [member]
Cash And Cash Equivalents And Short-term Deposits [line items]
Net of allowances	$ 3	$ 4

Cash And Cash Equivalents And Short-term Deposits [line items]

No definition available.

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