Subsequent events - Additional Information (Detail) - HSBC Canada [Member] - CAD ($) $ in Billions	Nov. 29, 2022	Sep. 30, 2022
Disclosure of non-adjusting events after reporting period [line items]
Par value of preferred shares and subordinated debt		$ 2.1
Events after reporting period [Member]
Disclosure of non-adjusting events after reporting period [line items]
Percentage of voting equity interests acquired	100.00%
Cash transferred	$ 13.5

The fair value, at acquisition date, of cash transferred as consideration in a business combination. [Refer: Business combinations [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2021-01-01
-Paragraph B64
-Subparagraph f
-Clause i
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-URIDate 2021-03-24

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- Definition

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+ References

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- Definition

The percentage of voting equity interests acquired in a business combination. [Refer: Business combinations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2021-01-01
-Paragraph B64
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2021-en-r&anchor=para_B64_c&doctype=Appendix&subtype=B
-URIDate 2021-03-24

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- Definition

Par value of preferred shares and subordinated debt.

+ References

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