v3.25.2
Strategic Lines of Business (Narrative) (Details)
6 Months Ended
Jun. 30, 2025
segment
Segment Reporting [Abstract]
Number of Major Business Segments
3
X
- Definition
Number of Major Business Segments
+ References
No definition available.
+ Details
Name:
cma_NumberOfMajorBusinessSegments
Namespace Prefix:
cma_
Data Type:
xbrli:integerItemType
Balance Type:
na
Period Type:
duration
X
- References
No definition available.
+ Details
Name:
us-gaap_SegmentReportingAbstract
Namespace Prefix:
us-gaap_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration