XML 135 R119.htm IDEA: XBRL DOCUMENT
v3.22.4

Income Taxes And Tax-Related Items Tax Years for Significant Jurisdictions That Remain Subject to Examination (Details) | 12 Months Ended
--- | ---
Dec. 31, 2022
Federal | Minimum |
Open Tax Year | 2019
Federal | Maximum |
Open Tax Year | 2021
New York | Minimum |
Open Tax Year | 2018
New York | Maximum |
Open Tax Year | 2021
California | Minimum |
Open Tax Year | 2006
Open tax years - second grouping | 2018
California | Maximum |
Open Tax Year | 2007
Open tax years - second grouping | 2021

X
- Definition Open tax years - second grouping + References No definition available. + Details
Name: | cma_OpenTaxYearsSecondGrouping
Namespace Prefix: | cma_
Data Type: | dtr-types:gYearListItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tax year that remains open to examination under enacted tax laws, in YYYY format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319 + Details
Name: | us-gaap_OpenTaxYear
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:gYearListItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_InternalRevenueServiceIRSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_NewYorkStateDivisionOfTaxationAndFinanceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_CaliforniaFranchiseTaxBoardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |