Derivative Financial Instruments - Summary of Credit Exposure of Derivative Financial Instruments (Parenthetical) (Detail) - CAD ($) $ in Millions	Oct. 31, 2025	Oct. 31, 2024
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

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]

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

Name:	ifrs-full_AmountsSubjectToEnforceableMasterNettingArrangementOrSimilarAgreementNotSetOffAgainstFinancialAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant