XML 84 R70.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Subordinated indebtedness - Additional Information (Detail) - Floating interest rate [member] - USD ($) $ in Millions | Jan. 31, 2025 | Jan. 22, 2025
--- | --- | ---
2085 [Member] |  |
Disclosure Of Subordinated Indebtedness [Line Items] |  |
Borrowings maturity |  | 2085
Repayments of subordinated liabilities |  | $ 10
Debt instrument redemption as a percentage of principal amount |  | 100.00%
2084 [Member] |  |
Disclosure Of Subordinated Indebtedness [Line Items] |  |
Borrowings maturity | 2084 |
Repayments of subordinated liabilities | $ 38 |
Debt instrument redemption as a percentage of principal amount | 100.00% |

X
- Definition Debt instrument redemption as a percentage of principal amount. + References No definition available. + Details
Name: | cm_DebtInstrumentRedemptionAsAPercentageOfPrincipalAmount
Namespace Prefix: | cm_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Disclosure of subordinated indebtedness [Line Items]. + References No definition available. + Details
Name: | cm_DisclosureOfSubordinatedIndebtednessLineItems
Namespace Prefix: | cm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maturity of borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 7 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_7&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_BorrowingsMaturity
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash outflow for repayments of subordinated liabilities. [Refer: Subordinated liabilities] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2024-01-01 -Paragraph 17 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_17&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_RepaymentsOfSubordinatedLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ifrs-full_TypesOfInterestRatesAxis=ifrs-full_FloatingInterestRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=cm_TwoThousandAndEightyFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=cm_TwoThousandAndEightyFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |