IFRS 7 - Disclosure - Credit Risk - Summary of Securitization Exposures (Parenthetical) (Detail) - CAD ($) $ in Millions	12 Months Ended
Oct. 31, 2018	Oct. 31, 2017
Securitization exposures [member] \| Internal Ratings Based [member]
Disclosure of credit risk exposure [line items]
Net of financial collateral	$ 6	$ 5

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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