XML 83 R67.htm IDEA: XBRL DOCUMENT
v3.22.4

Credit Quality And Allowance For Credit Losses (Aging Analysis Of Loans) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | $ 401 | $ 180
Nonaccrual loans |  | 240 | 264
Current Loans | [1] | 52,761 | 48,841
Total loans |  | 53,402 | 49,285
30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 341 | 118
60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 37 | 35
90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 23 | 27
Real estate construction |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total loans |  | 3,105 | 2,948
Real estate construction | Other Business Lines Member |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total loans | [2] | 600 | 557
Commercial mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total loans |  | 13,306 | 11,255
Commercial mortgage | Other Business Lines Member |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total loans | [2] | 8,625 | 7,917
Business loans | Commercial borrower |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 366 | 132
Nonaccrual loans |  | 171 | 216
Current Loans | [1] | 48,740 | 45,069
Total loans |  | 49,277 | 45,417
Business loans | Commercial borrower | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 310 | 78
Business loans | Commercial borrower | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 33 | 31
Business loans | Commercial borrower | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 23 | 23
Business loans | Commercial borrower | Domestic loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 271 | 59
Nonaccrual loans |  | 142 | 173
Current Loans | [1] | 30,496 | 29,134
Total loans |  | 30,909 | 29,366
Business loans | Commercial borrower | Domestic loans | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 238 | 35
Business loans | Commercial borrower | Domestic loans | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 13 | 18
Business loans | Commercial borrower | Domestic loans | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 20 | 6
Business loans | Commercial borrower | International loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 9 | 14
Nonaccrual loans |  | 3 | 5
Current Loans | [1] | 1,185 | 1,189
Total loans |  | 1,197 | 1,208
Business loans | Commercial borrower | International loans | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 0 | 5
Business loans | Commercial borrower | International loans | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 9 | 8
Business loans | Commercial borrower | International loans | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 0 | 1
Business loans | Commercial borrower | Real estate construction | Domestic loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 2 | 16
Nonaccrual loans |  | 3 | 6
Current Loans | [1] | 3,100 | 2,926
Total loans |  | 3,105 | 2,948
Business loans | Commercial borrower | Real estate construction | Domestic loans | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 2 | 15
Business loans | Commercial borrower | Real estate construction | Domestic loans | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 0 | 1
Business loans | Commercial borrower | Real estate construction | Domestic loans | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 0 | 0
Business loans | Commercial borrower | Real estate construction | Domestic loans | Commercial Real Estate business line |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing | [3] | 0 | 0
Nonaccrual loans | [3] | 0 | 0
Current Loans | [1],[3] | 2,505 | 2,391
Total loans | [3] | 2,505 | 2,391
Business loans | Commercial borrower | Real estate construction | Domestic loans | Commercial Real Estate business line | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing | [3] | 0 | 0
Business loans | Commercial borrower | Real estate construction | Domestic loans | Commercial Real Estate business line | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing | [3] | 0 | 0
Business loans | Commercial borrower | Real estate construction | Domestic loans | Commercial Real Estate business line | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing | [3] | 0 | 0
Business loans | Commercial borrower | Real estate construction | Domestic loans | Other business lines |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing | [2] | 2 | 16
Nonaccrual loans | [2] | 3 | 6
Current Loans | [1],[2] | 595 | 535
Total loans | [2] | 600 | 557
Business loans | Commercial borrower | Real estate construction | Domestic loans | Other business lines | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing | [2] | 2 | 15
Business loans | Commercial borrower | Real estate construction | Domestic loans | Other business lines | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing | [2] | 0 | 1
Business loans | Commercial borrower | Real estate construction | Domestic loans | Other business lines | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing | [2] | 0 | 0
Business loans | Commercial borrower | Commercial mortgage | Domestic loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 78 | 38
Nonaccrual loans |  | 23 | 32
Current Loans | [1] | 13,205 | 11,185
Total loans |  | 13,306 | 11,255
Business loans | Commercial borrower | Commercial mortgage | Domestic loans | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 64 | 18
Business loans | Commercial borrower | Commercial mortgage | Domestic loans | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 11 | 4
Business loans | Commercial borrower | Commercial mortgage | Domestic loans | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 3 | 16
Business loans | Commercial borrower | Commercial mortgage | Domestic loans | Commercial Real Estate business line |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing | [3] | 6 | 0
Nonaccrual loans | [3] | 1 | 1
Current Loans | [1],[3] | 4,674 | 3,337
Total loans | [3] | 4,681 | 3,338
Business loans | Commercial borrower | Commercial mortgage | Domestic loans | Commercial Real Estate business line | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing | [3] | 0 | 0
Business loans | Commercial borrower | Commercial mortgage | Domestic loans | Commercial Real Estate business line | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing | [3] | 6 | 0
Business loans | Commercial borrower | Commercial mortgage | Domestic loans | Commercial Real Estate business line | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing | [3] | 0 | 0
Business loans | Commercial borrower | Commercial mortgage | Domestic loans | Other business lines |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing | [2] | 72 | 38
Nonaccrual loans | [2] | 22 | 31
Current Loans | [1],[2] | 8,531 | 7,848
Total loans | [2] | 8,625 | 7,917
Business loans | Commercial borrower | Commercial mortgage | Domestic loans | Other business lines | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing | [2] | 64 | 18
Business loans | Commercial borrower | Commercial mortgage | Domestic loans | Other business lines | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing | [2] | 5 | 4
Business loans | Commercial borrower | Commercial mortgage | Domestic loans | Other business lines | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing | [2] | 3 | 16
Business loans | Commercial borrower | Lease financing | Domestic loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 6 | 5
Nonaccrual loans |  | 0 | 0
Current Loans | [1] | 754 | 635
Total loans |  | 760 | 640
Business loans | Commercial borrower | Lease financing | Domestic loans | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 6 | 5
Business loans | Commercial borrower | Lease financing | Domestic loans | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 0 | 0
Business loans | Commercial borrower | Lease financing | Domestic loans | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 0 | 0
Retail loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 35 | 48
Nonaccrual loans |  | 69 | 48
Current Loans | [1] | 4,021 | 3,772
Total loans |  | 4,125 | 3,868
Retail loans | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 31 | 40
Retail loans | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 4 | 4
Retail loans | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 0 | 4
Retail loans | Residential mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 22 | 4
Nonaccrual loans |  | 53 | 36
Current Loans | [1] | 1,739 | 1,731
Total loans |  | 1,814 | 1,771
Retail loans | Residential mortgage | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 22 | 4
Retail loans | Residential mortgage | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 0 | 0
Retail loans | Residential mortgage | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 0 | 0
Retail loans | Consumer borrower |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 13 | 44
Nonaccrual loans |  | 16 | 12
Current Loans | [1] | 2,282 | 2,041
Total loans |  | 2,311 | 2,097
Retail loans | Consumer borrower | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 9 | 36
Retail loans | Consumer borrower | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 4 | 4
Retail loans | Consumer borrower | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 0 | 4
Retail loans | Consumer borrower | Home equity |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 7 | 7
Nonaccrual loans |  | 15 | 12
Current Loans | [1] | 1,754 | 1,514
Total loans |  | 1,776 | 1,533
Retail loans | Consumer borrower | Home equity | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 4 | 4
Retail loans | Consumer borrower | Home equity | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 3 | 3
Retail loans | Consumer borrower | Home equity | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 0 | 0
Retail loans | Consumer borrower | Other consumer |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 6 | 37
Nonaccrual loans |  | 1 | 0
Current Loans | [1] | 528 | 527
Total loans |  | 535 | 564
Retail loans | Consumer borrower | Other consumer | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 5 | 32
Retail loans | Consumer borrower | Other consumer | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | 1 | 1
Retail loans | Consumer borrower | Other consumer | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans Past due and still accruing |  | $ 0 | $ 4
[1] | Includes $22 million of loans with deferred payments not considered past due in accordance with the Coronavirus Aid, Relief, and Economic Security Act (CARES Act) at December 31, 2021.
[2] | Primarily loans secured by owner-occupied real estate.
[3] | Primarily loans to real estate developers.

X
- Definition Current Loans + References No definition available. + Details
Name: | cma_CurrentLoans
Namespace Prefix: | cma_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loans Past due and still accruing + References No definition available. + Details
Name: | cma_LoansPastDueAndStillAccruing
Namespace Prefix: | cma_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Reflects the carrying amount of loans deemed to be questionable as to collection on which no interest is continuing to be recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5111-111524 + Details
Name: | us-gaap_LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5074-111524 + Details
Name: | us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables30To59DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables60To89DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConstructionLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cma_CommercialRealEstateLineOfBusinessClassificationAxis=cma_OtherBusinessLineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_RealEstateLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfFinancingReceivableTypeOfBorrowerAxis=us-gaap_CommercialBorrowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_GeographicDistributionAxis=us-gaap_GeographicDistributionDomesticMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_GeographicDistributionAxis=us-gaap_GeographicDistributionForeignMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_RealEstateSectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_CommercialAndIndustrialSectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cma_LeaseFinancingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ResidentialMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfFinancingReceivableTypeOfBorrowerAxis=us-gaap_ConsumerBorrowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cma_ConsumerFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |