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Derivative Financial Instruments - Summary of Credit Exposure of Derivative Financial Instruments (Parenthetical) (Detail) - CAD ($) $ in Millions | Oct. 31, 2025 | Oct. 31, 2024
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CRA [member] |  |
Disclosure of financial assets [line items] |  |
Amounts relating to netting and collateral | $ 37,853 | $ 35,510
CEA [member] |  |
Disclosure of financial assets [line items] |  |
Amounts relating to netting and collateral | $ 102,031 | $ 87,284

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- Definition The amounts that are subject to an enforceable master netting arrangement or similar agreement and that are not set off against financial assets. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 13C -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_13C_d&doctype=Standard -URIDate 2024-03-27 + Details
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Balance Type: | credit
Period Type: | instant

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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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Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |