Capital Trust Securities - Additional Information (Detail) - Tier one notes series B [member] - Repayment Of Notes [Member] $ in Millions	Nov. 01, 2021 CAD ($)
Disclosure of trust capital securities [line items]
Repayment of bonds notes and debentures	$ 300
Percentage of the principal amount redeemed	100.00%

The cash outflow for repayments of bonds, notes and debentures.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2022-03-24
-Paragraph 17
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2022-en-r&anchor=para_17&doctype=Standard
-URIDate 2022-03-24

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration