Derecognition of financial assets - Additional Information (Detail) - CAD ($) $ in Billions	Oct. 31, 2021	Oct. 31, 2020
Canadian emergency business account loans [member]
Disclosure of financial assets [line items]
Derecognized CEBA Loans	$ 4.3	$ 3.0

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

No definition available.

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