Insurance - Summary of the Insurance Liability by Remaining Coverage and Incurred Claims (Parenthetical) (Detail) - CAD ($) $ in Millions	Jan. 31, 2025	Jan. 31, 2024
Insurance service result [abstract]
Liabilities for incurred claims	$ 116	$ 126

The amount of the liabilities for incurred claims that arise from contracts within the scope of IFRS 17. [Refer: Liabilities for incurred claims [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 17
-IssueDate 2024-01-01
-Paragraph 130
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_130&doctype=Standard
-URIDate 2024-03-27

Name:	ifrs-full_LiabilitiesForIncurredClaimsThatAriseFromContractsWithinScopeOfIFRS17
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant