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Related Party Transactions - Summary of Loans and Deposits of Key Management Personnel (Detail) - Key management personnel directors and their close family members [member] - CAD ($) $ in Millions | 12 Months Ended
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Oct. 31, 2025 | Oct. 31, 2024
Disclosure of amounts incurred by entity for provision of key management personnel services provided by separate management entities [line items] |  |
Loans | $ 7 | $ 10
Deposits | $ 2 | $ 5

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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. + Details
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- Definition The amount of transfers under finance agreements from the entity in related party transactions, including loans and equity contributions in cash or in kind. [Refer: Total for all related parties [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 24 -IssueDate 2024-01-01 -Paragraph 21 -Subparagraph g -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2024-en-r&anchor=para_21_g&doctype=Standard -URIDate 2024-03-27 + Details
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