XML 159 R96.htm IDEA: XBRL DOCUMENT
v3.25.3

Fair Value Measurement - Summary of Assets and Liabilities Not Carried On Consolidated Balance Sheet at Fair Value (Detail) - CAD ($) $ in Millions | Oct. 31, 2025 | Oct. 31, 2024
--- | --- | ---
Financial assets |  |  |
Amortized cost securities |  | $ 65,471 | $ 71,610
Residential mortgages |  | 287,033 | 280,672
Personal |  | 47,866 | 46,681
Credit card |  | 21,581 | 20,551
Business and government | [1] | 237,416 | 214,305
Financial liabilities |  |  |
Business and government |  | 457,284 | 435,499
Bank |  | 26,723 | 20,009
Secured borrowings |  | 65,978 | 56,455
Subordinated indebtedness |  | 7,819 | 7,465
Not measured at fair value in statement of financial position but for which fair value is disclosed [member] |  |  |
Financial assets |  |  |
Amortized cost securities |  | 65,409 | 70,702
Residential mortgages |  | 287,325 | 279,802
Personal |  | 46,774 | 45,750
Credit card |  | 20,651 | 19,682
Business and government |  | 235,232 | 212,523
Financial liabilities |  |  |
Personal |  | 77,924 | 87,852
Business and government |  | 197,574 | 196,297
Bank |  | 8,737 | 9,420
Secured borrowings |  | 65,383 | 55,418
Subordinated indebtedness |  | 8,091 | 7,698
Level 2 of fair value hierarchy [member] | Not measured at fair value in statement of financial position but for which fair value is disclosed [member] |  |  |
Financial assets |  |  |
Amortized cost securities |  | 64,642 | 69,961
Financial liabilities |  |  |
Personal |  | 73,757 | 82,620
Business and government |  | 193,978 | 191,616
Bank |  | 8,737 | 9,420
Secured borrowings |  | 62,356 | 50,546
Subordinated indebtedness |  | 8,091 | 7,698
Level 3 of fair value hierarchy [member] | Not measured at fair value in statement of financial position but for which fair value is disclosed [member] |  |  |
Financial assets |  |  |
Amortized cost securities |  | 767 | 741
Residential mortgages |  | 287,325 | 279,802
Personal |  | 46,774 | 45,750
Credit card |  | 20,651 | 19,682
Business and government |  | 235,232 | 212,523
Financial liabilities |  |  |
Personal |  | 4,167 | 5,232
Business and government |  | 3,596 | 4,681
Secured borrowings |  | $ 3,027 | $ 4,872
[1] | Includes customers’ liability under acceptances of $10 million (2024: $6 million) in business and government loans and acceptances of $10 million (2024: $6 million) in other liabilities. Prior year amounts have been revised to conform to the presentation adopted in 2025.

X
- Definition Deposits from business and government. + References No definition available. + Details
Name: | cm_DepositsFromBusinessAndGovernment
Namespace Prefix: | cm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Loans to business and government. + References No definition available. + Details
Name: | cm_LoansToBusinessAndGovernment
Namespace Prefix: | cm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Residential mortgage loans. + References No definition available. + Details
Name: | cm_ResidentialMortgageLoans
Namespace Prefix: | cm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Securities measured at amortized cost. + References No definition available. + Details
Name: | cm_SecuritiesMeasuredAtAmortizedCost
Namespace Prefix: | cm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of liabilities associated with transferred financial assets that the entity continues to recognise in full. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 42D -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_42D_e&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_AssociatedLiabilitiesThatEntityContinuesToRecognise
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of consumer loans made by the entity. [Refer: Loans to consumers [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_ConsumerLoans
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of credit card loans made by the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_CreditCardLoans
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of deposit liabilities from banks held by the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_DepositsFromBanks
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of deposit liabilities from customers held by the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_DepositsFromCustomers
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | ifrs-full_DisclosureOfFinancialAssetsAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | ifrs-full_DisclosureOfFinancialLiabilitiesAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of liabilities that are subordinate to other liabilities with respect to claims. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_SubordinatedLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_MeasurementAxis=ifrs-full_NotMeasuredAtFairValueInStatementOfFinancialPositionButForWhichFairValueIsDisclosedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level2OfFairValueHierarchyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level3OfFairValueHierarchyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |