Income Taxes And Tax-Related Items Principal Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Allowance for loan losses	$ 145	$ 128
Deferred compensation	77	84
Deferred loan origination fees and costs	11	12
Deferred Tax Asset, Hedging gains and losses	186	290
Deferred Tax Assets, net unrealized gains on investment securities available-for-sale	628	713
Operating lease liabilities	81	85
Other temporary differences, net	124	42
Total deferred tax asset before valuation allowance	1,252	1,354
Valuation allowance	(6)	(5)
Total deferred tax assets	1,246	1,349
Deferred tax liabilities:
Lease financing transactions	(20)	(31)
Defined benefit plans	159	123
Allowance for depreciation	(5)	(4)
Leasing right of use assets	(67)	(71)
Total deferred tax liabilities	(251)	(229)
Net deferred tax asset	$ 995	$ 1,120

Deferred Tax Asset, Hedging gains and losses

No definition available.

Name:	cma_DeferredTaxAssetHedgingGainsAndLosses
Namespace Prefix:	cma_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from deferred loan origination fees and costs which can only be deducted for tax purposes when the loan has matured or been sold, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.

+ References

No definition available.