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Fair Value Measurement - Fair Value of Financial Instruments (Parenthetical) (Detail) - CAD ($) $ in Millions | Oct. 31, 2025 | Oct. 31, 2024
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Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items] |  |
Loans to consumers | $ 47,866 | $ 46,681
Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] |  |
Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items] |  |
Loans to consumers | 10 | 6
Loans to government | $ 10 | $ 6

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- Definition The amount of consumer loans made by the entity. [Refer: Loans to consumers [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of loans to government made by the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard -URIDate 2024-03-27 + Details
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