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Designated Accounting Hedges - Summary of Hedge Accounting Impact on the Consolidated Statement of Income (Detail) - Fair value hedges [member] - CAD ($) $ in Millions | 12 Months Ended
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Oct. 31, 2025 | Oct. 31, 2024
Disclosure Of Information About Hedge Accounting Impact On Statement Of Income [Line Items] |  |
Hedge ineffectiveness gains (losses) recognized in income | $ (25) | $ 49
Interest rate risk [member] |  |
Disclosure Of Information About Hedge Accounting Impact On Statement Of Income [Line Items] |  |
Hedge ineffectiveness gains (losses) recognized in income | (31) | 45
Combined foreign exchange and interest rate risk [member] |  |
Disclosure Of Information About Hedge Accounting Impact On Statement Of Income [Line Items] |  |
Hedge ineffectiveness gains (losses) recognized in income | 6 | 4
Hedging instruments [member] |  |
Disclosure Of Information About Hedge Accounting Impact On Statement Of Income [Line Items] |  |
Gains (losses) on the hedged items | 220 | (1,371)
Hedging instruments [member] | Interest rate risk [member] |  |
Disclosure Of Information About Hedge Accounting Impact On Statement Of Income [Line Items] |  |
Gains (losses) on the hedged items | (158) | (2,116)
Hedging instruments [member] | Combined foreign exchange and interest rate risk [member] |  |
Disclosure Of Information About Hedge Accounting Impact On Statement Of Income [Line Items] |  |
Gains (losses) on the hedged items | 378 | 745
Hedging risk [member] |  |
Disclosure Of Information About Hedge Accounting Impact On Statement Of Income [Line Items] |  |
Gains (losses) on the hedged items | (245) | 1,420
Hedging risk [member] | Interest rate risk [member] |  |
Disclosure Of Information About Hedge Accounting Impact On Statement Of Income [Line Items] |  |
Gains (losses) on the hedged items | 127 | 2,161
Hedging risk [member] | Combined foreign exchange and interest rate risk [member] |  |
Disclosure Of Information About Hedge Accounting Impact On Statement Of Income [Line Items] |  |
Gains (losses) on the hedged items | $ (372) | $ (741)

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- Definition Disclosure of information about hedge accounting impact on statement of income. + References No definition available. + Details
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- Definition The gain (loss) recognised in profit or loss on hedge ineffectiveness. [Refer: Gain (loss) on hedge ineffectiveness] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 24C -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24C_a_i&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 24C -Subparagraph b -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24C_b_ii&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The gains (losses) resulting from change in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 85 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_85&doctype=Standard -URIDate 2024-03-27 + Details
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