DERIVATIVES - Credit Derivatives (Details) $ in Millions	6 Months Ended
	Jun. 30, 2024 USD ($) agency	Dec. 31, 2023 USD ($)
Credit Risk Derivatives
Fair values, receivable	$ 8,143	$ 8,339
Fair values, payable	7,730	8,082
Notionals, protection purchased	562,640	567,627
Notionals, protection sold	483,472	496,699
Fair value of derivative in liability position	15,000	15,000
Fair value of collateral already posted	$ 13,000	12,000
Number of rating agencies | agency	3
Additional collateral to be posted	$ 200
Collateral to be segregated	14
Aggregate cash obligations and collateral requirements	200
Fair value gross derivative assets	277,223	308,431
Purchased
Credit Risk Derivatives
Fair values, receivable	3,329	2,770
Fair values, payable	5,586	6,097
Sold
Credit Risk Derivatives
Fair values, receivable	4,814	5,569
Fair values, payable	2,144	1,985
Within 1 year
Credit Risk Derivatives
Fair values, receivable	988	986
Fair values, payable	1,336	1,713
Notionals, protection purchased	170,278	155,910
Notionals, protection sold	147,932	128,874
From 1 to 5 years
Credit Risk Derivatives
Fair values, receivable	5,680	5,816
Fair values, payable	5,071	4,939
Notionals, protection purchased	346,319	366,156
Notionals, protection sold	310,789	337,583
After 5 years
Credit Risk Derivatives
Fair values, receivable	1,475	1,537
Fair values, payable	1,323	1,430
Notionals, protection purchased	46,043	45,561
Notionals, protection sold	24,751	30,242
Investment grade
Credit Risk Derivatives
Fair values, receivable	4,057	4,282
Fair values, payable	3,694	4,138
Notionals, protection purchased	432,898	444,989
Notionals, protection sold	378,988	393,115
Non-investment grade
Credit Risk Derivatives
Fair values, receivable	4,086	4,057
Fair values, payable	4,036	3,944
Notionals, protection purchased	129,742	122,638
Notionals, protection sold	104,484	103,584
Credit default swaps and options
Credit Risk Derivatives
Fair values, receivable	7,118	7,686
Fair values, payable	7,221	7,243
Notionals, protection purchased	522,912	539,522
Notionals, protection sold	476,386	491,514
Total return swaps and other
Credit Risk Derivatives
Fair values, receivable	1,025	653
Fair values, payable	509	839
Notionals, protection purchased	39,728	28,105
Notionals, protection sold	7,086	5,185
Interest rate swaps
Credit Risk Derivatives
Cash proceeds received for assets derecognized	6,100	4,300
Fair value of derecognized assets	5,700	4,300
Fair value gross derivative assets	89	121
Trading derivatives, liability	$ 46	$ 29