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Current And Future Changes In Accounting Policies (Schedule of Adjustments to Insurance-Related Balance Reported Under IFRS 4) (Details) - CAD ($) $ in Millions | Oct. 31, 2025 | Oct. 31, 2024
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Disclosure Of Reconciliation Of Changes In Insurance Contracts By Components [Line Items] |  |
Insurance-related liabilities | $ 7,278 | $ 7,169

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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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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of insurance contracts that are liabilities. [Refer: Liabilities; Insurance contracts [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 17 -IssueDate 2024-01-01 -Paragraph 99 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_99_b&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_InsuranceContractsThatAreLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant