XML 88 R74.htm IDEA: XBRL DOCUMENT v3.25.1

Post-Employment Benefits - Summary of Defined Benefit Plan Expense (Detail) - CAD ($) $ in Millions	3 Months Ended			6 Months Ended
	Apr. 30, 2025	Jan. 31, 2025	Apr. 30, 2024	Apr. 30, 2025	Apr. 30, 2024
Pension plan [member]
Disclosure of defined benefit plans [line items]
Current service cost	$ 57	$ 57	$ 47	$ 114	$ 95
Net interest (income) expense	(20)	(20)	(15)	(40)	(31)
Interest expense on effect of asset ceiling	1	1		2
Plan administration costs	2	2	2	4	4
Net defined benefit plan expense recognized in net income	40	40	34	80	68
Other post employment benefit plans [member]
Disclosure of defined benefit plans [line items]
Current service cost	1	1	1	2	2
Net interest (income) expense	5	5	6	10	12
Net defined benefit plan expense recognized in net income	$ 6	$ 6	$ 7	$ 12	$ 14

X

- Definition

Interest expense on asset ceiling.

+ References

No definition available.

+ Details

Name:	cm_InterestExpenseOnAssetCeiling
Namespace Prefix:	cm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Net defined benefit plan expense recognized in net income.

+ References

No definition available.

+ Details

Name:	cm_NetDefinedBenefitPlanExpenseRecognizedInNetIncome
Namespace Prefix:	cm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The increase (decrease) in the net defined benefit liability (asset) resulting from employee service in the current period. [Refer: Net defined benefit liability (asset)]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2024-01-01
-Paragraph 141
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_a&doctype=Standard
-URIDate 2024-03-27

+ Details

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

X

- 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

Name:	ifrs-full_DisclosureOfDefinedBenefitPlansLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The increase (decrease) in the net defined benefit liability (asset) resulting from the passage of time. [Refer: Interest expense; Net defined benefit liability (asset)]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2024-01-01
-Paragraph 141
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_b&doctype=Standard
-URIDate 2024-03-27

+ Details

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

X

- Definition

The decrease (increase) in the net defined benefit liability (asset) resulting from payments from the plan. [Refer: Net defined benefit liability (asset)]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2024-01-01
-Paragraph 141
-Subparagraph g
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_g&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	cm_DefinedBenefitPlansByNameAxis=cm_PensionPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	cm_DefinedBenefitPlansByNameAxis=cm_OtherPostEmploymentBenefitPlansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: