INCOME TAXES - Deferred Income Taxes (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets
Credit loss deduction	$ 5,162	$ 5,330
Deferred compensation and employee benefits	2,059	2,335
U.S. tax on non-U.S. earnings	1,191	1,138
Investment and loan basis differences	5,149	2,970
Tax credit and net operating loss carry-forwards	14,623	15,620
Fixed assets and leases	3,551	3,064
Other deferred tax assets	4,055	3,549
Gross deferred tax assets	35,790	34,006
Valuation allowance	2,438	4,194
Deferred tax assets after valuation allowance	33,352	29,812
Deferred tax liabilities
Intangibles and leases	(2,271)	(2,446)
Non-U.S. withholding taxes	(1,142)	(987)
Debt issuances	(595)	(126)
Other deferred tax liabilities	(1,672)	(1,464)
Gross deferred tax liabilities	(5,680)	(5,023)
Net deferred tax assets	$ 27,672	$ 24,789