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Related Party Transactions - Summary of Transaction With Joint Ventures and Associates (Detail) - Associates and joint ventures [member] - CAD ($) $ in Millions		12 Months Ended
		Oct. 31, 2025	Oct. 31, 2024
Disclosure of transactions between related parties [line items]
Loans	[1]	$ 1,976	$ 1,864
Deposits		269	241
Fees paid for services received		63	66
Guarantees and commitments		$ 242	$ 210
[1] We had no ACL on impaired loans related to these amounts as at October 31, 2025 and 2024.

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- Definition

The amounts payable resulting from related party transactions. [Refer: Total for all related parties [member]]

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The cash outflow for loans and advances made to related parties. [Refer: Total for all related parties [member]]

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- Definition

The amount of related-party commitments made by the entity to do something if a particular event occurs or does not occur in the future, including executory contracts (recognised and unrecognised). [Refer: Total for all related parties [member]]

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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.

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The amount of services received in related party transactions. [Refer: Total for all related parties [member]]

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