XML 105 R89.htm IDEA: XBRL DOCUMENT v3.22.4

Deposits Deposits (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Deposits [Abstract]
Domestic certificates of deposit of $250,000 or more	$ 478	$ 627
Foreign office time deposits in denominations of $250,000 or more	$ 51	$ 50

X

- Definition

The aggregate amount of time deposit accounts (including certificates of deposit) in denominations that meet or exceed the FDIC insurance limit at the balance sheet date.

+ References

No definition available.

+ Details

Name:	cma_DomesticTimeDeposits250000orMore
Namespace Prefix:	cma_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Foreign Time Deposits $250,000 or More

+ References

No definition available.

+ Details

Name:	cma_ForeignTimeDeposits250000OrMore
Namespace Prefix:	cma_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_DepositsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration