Derecognition of financial assets - Additional Information (Detail) - Securities lent [member] - CAD ($) $ in Millions	12 Months Ended
Oct. 31, 2025	Oct. 31, 2024
Disclosure of financial assets [line items]
Recognised assets representing continuing involvement in derecognised financial assets	$ 4,550	$ 8,486
Gain (loss) of derecognised financial assets at date of transfer	$ 365	$ 491

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.

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The gain (loss) recognised on derecognised financial assets as of the date of the transfer of the assets. [Refer: Financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
-Paragraph 42G
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_42G_a&doctype=Standard
-URIDate 2024-03-27

+ Details

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Period Type:	duration

- Definition

The amount of assets recognised in the statement of financial position representing the entity's continuing involvement in derecognised financial assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
-Paragraph 42E
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_42E_a&doctype=Standard
-URIDate 2024-03-27

+ Details

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Balance Type:	debit
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- Details

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