XML 94 R80.htm IDEA: XBRL DOCUMENT v3.25.0.1

Contingent Liabilities and Provisions - Additional Information (Detail) - Legal proceedings contingent liability [member] $ in Billions	Jan. 31, 2025 CAD ($)
Bottom of range [member]
Disclosure Of Contingent Assets And Liabilities [Line Items]
Estimated financial effect of contingent liabilities	$ 0.0
Top of range [member]
Disclosure Of Contingent Assets And Liabilities [Line Items]
Estimated financial effect of contingent liabilities	$ 0.7

X

- Definition

Disclosure Of Contingent Assets And Liabilities [Line Items]

+ References

No definition available.

+ Details

Name:	cm_DisclosureOfContingentAssetsAndLiabilitiesLineItems
Namespace Prefix:	cm_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of the estimated financial effect of contingent liabilities. [Refer: Classes of contingent liabilities [domain]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 37
-IssueDate 2024-01-01
-Paragraph 86
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_86_a&doctype=Standard
-URIDate 2024-03-27

+ Details

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

X

- Details

Name:	ifrs-full_ClassesOfContingentLiabilitiesAxis=ifrs-full_LegalProceedingsContingentLiabilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: