Structured Entities - Summary of Unconsolidated Structured Entities (Parenthetical) (Detail) - CAD ($) $ in Billions	Oct. 31, 2025	Oct. 31, 2024
Top of range [member]
Disclosure of unconsolidated structured entities [line items]
Asset-backed commercial paper issued	$ 1.6	$ 1.4

The amount of commercial paper issued by the entity.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2024-03-27

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