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Securities - Summary of Securities (Parenthetical) (Detail) - CAD ($) $ in Millions	3 Months Ended
	Jul. 31, 2025	Oct. 31, 2024
Debt securities [member] | Financial assets at amortised cost, category [member]
Disclosure of detailed information about financial instruments [line items]
Realized gain (loss) on disposal of debt securities	$ 0	$ 0

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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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- Definition

The gains (losses) on disposals of investments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 98
-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_98_d&doctype=Standard
-URIDate 2024-03-27

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- Details

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