XML 213 R150.htm IDEA: XBRL DOCUMENT
v3.25.3

Subordinated Indebtedness - Schedule of Terms of Subordinated Indebtedness (Parenthetical) (Detail) $ / shares in Units, $ in Millions, $ in Billions |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Jul. 21, 2025 CAD ($) | Feb. 28, 2025 USD ($) | Jan. 31, 2025 USD ($) | Oct. 31, 2025 $ / shares
Disclosure of detailed information about borrowings [line items] |  |  |  |
Percentage of principal amount redeemed |  |  |  | 150.00%
Debentures convertible into common shares subject to minimum price per share | $ / shares |  |  |  | $ 2.5
Three-month Canadian dollar bankers' acceptance rate [member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings interest rate |  |  |  | 0.56%
January 31, 2025 [member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings maturity |  |  |  | 2084
Debt instrument redemption as a percentage of principal amount |  |  | 100.00% |
Borrowings Redemption Price Percentage Of Principal Amount Redeemed |  |  | $ 38 |
February 28, 2025 [member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings maturity |  | 2085 |  |
Debt instrument redemption as a percentage of principal amount |  | 100.00% |  |
Borrowings Redemption Price Percentage Of Principal Amount Redeemed |  | $ 10 |  |
July 21, 2030 [Member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings interest rate |  |  |  | 2.01%
Borrowings maturity | July 21, 2030 |  |  | July 21, 2030
Debt instrument redemption as a percentage of principal amount | 100.00% |  |  |
Borrowings Redemption Price Percentage Of Principal Amount Redeemed | $ 1.0 |  |  |
April 7, 2032 [member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings interest rate |  |  |  | 4.20%
Borrowings maturity |  |  |  | April 7, 2032
April 7, 2032 [member] | Canadian Overnight Reporate Advantage [Member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings interest rate |  |  |  | 1.69%
January 20, 2033 [member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings interest rate |  |  |  | 5.33%
Borrowings maturity |  |  |  | January 20, 2033
January 20, 2033 [member] | Canadian Overnight Reporate Advantage [Member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings adjustment to interest rate percentage |  |  |  | 2.37%
April 20, 2033 [member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings interest rate |  |  |  | 5.35%
Borrowings maturity |  |  |  | April 20, 2033
April 20, 2033 [member] | Canadian Overnight Reporate Advantage [Member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings adjustment to interest rate percentage |  |  |  | 2.23%
January 16, 2034 [member] | Canadian Overnight Reporate Advantage [Member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings adjustment to interest rate percentage |  |  |  | 2.02%
June 12, 2034 [member] | Canadian Overnight Reporate Advantage [Member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings adjustment to interest rate percentage |  |  |  | 1.56%
April 2, 2035 [member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings interest rate |  |  |  | 4.15%
Borrowings maturity |  |  |  | April 2, 2035
April 2, 2035 [member] | Canadian Overnight Reporate Advantage [Member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings adjustment to interest rate percentage |  |  |  | 1.72%

X
- Definition Debentures convertible into common shares subject to minimum price per share. + References No definition available. + Details
Name: | cm_DebenturesConvertibleIntoCommonSharesSubjectToMinimumPricePerShare
Namespace Prefix: | cm_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

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 Percentage of principal amount redeemed. + References No definition available. + Details
Name: | cm_PercentageOfPrincipalAmountRedeemed
Namespace Prefix: | cm_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The adjustment to the basis (reference rate) used for calculation of the interest rate on 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_BorrowingsAdjustmentToInterestRateBasis
Namespace Prefix: | ifrs-full_
Data Type: | dtr-2022:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The interest rate on 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_BorrowingsInterestRate
Namespace Prefix: | ifrs-full_
Data Type: | dtr-2022:percentItemType
Balance Type: | na
Period Type: | instant

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 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_DisclosureOfDetailedInformationAboutBorrowingsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash outflow to settle borrowings, classified as financing activities. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2024-01-01 -Paragraph 17 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_17_d&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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

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

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

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

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

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

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

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

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

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