INCOME TAXES - Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Other comprehensive income	$ 1,291	$ 1,546
Allowance for credit losses	555	511
Federal and state net operating and capital loss carryforwards	79	77
Accrued expenses	1,152	863
Investment and other tax credit carryforwards	130	131
Other	9	19
Total deferred tax assets	3,216	3,147
Valuation allowance	(137)	(133)
Deferred tax assets, net of valuation allowance	3,079	3,014
Deferred tax liabilities:
Leasing transactions	297	287
Amortization of intangibles	421	413
Depreciation	532	470
Pension and other employee compensation plans	130	128
Partnerships	12	87
Deferred Income	3	12
MSRs	252	203
Total deferred tax liabilities	1,647	1,600
Net deferred tax asset (liability)	$ 1,432	$ 1,414