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Related Party Transactions - Additional Information (Detail) - CAD ($) $ in Millions	12 Months Ended
	Oct. 31, 2025	Oct. 31, 2024
Disclosure of transactions between related parties [line items]
Wealth Management Assets	$ 6,400.0	$ 6,000.0
Revenue From Rendering Of Services Related Party Transactions	7.0	6.7
Directors [member]
Disclosure of transactions between related parties [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	263.0	267.0
Utilized credit exposure	$ 186.0	$ 199.0

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- Definition

Utilized credit exposure.

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- Definition

Wealth management assets.

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- Definition

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

+ References

No definition available.

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- Definition

The amount of the exposure to credit risk on loan commitments and financial guarantee contracts. [Refer: Loan commitments [member]; Financial guarantee contracts [member]; Credit risk [member]]

+ References

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- Definition

The amount of revenue arising from the rendering of services in related party transactions. [Refer: Revenue; Total for all related parties [member]]

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