DERIVATIVES - Credit Derivatives (Details) $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($) agency	Dec. 31, 2023 USD ($)
Credit Risk Derivatives
Fair values, receivable	$ 8,022	$ 8,339
Fair values, payable	8,214	8,082
Notionals, protection purchased	600,021	567,627
Notionals, protection sold	514,599	496,699
Fair value of derivative in liability position	14,000	15,000
Fair value of collateral already posted	$ 12,000	12,000
Number of rating agencies | agency	3
Additional collateral to be posted	$ 200
Collateral to be segregated	16
Aggregate cash obligations and collateral requirements	200
Fair value gross derivative assets	316,493	308,431
Purchased
Credit Risk Derivatives
Fair values, receivable	2,574	2,770
Fair values, payable	6,365	6,097
Sold
Credit Risk Derivatives
Fair values, receivable	5,448	5,569
Fair values, payable	1,849	1,985
Within 1 year
Credit Risk Derivatives
Fair values, receivable	706	986
Fair values, payable	1,480	1,713
Notionals, protection purchased	164,391	155,910
Notionals, protection sold	139,057	128,874
From 1 to 5 years
Credit Risk Derivatives
Fair values, receivable	5,487	5,816
Fair values, payable	5,216	4,939
Notionals, protection purchased	355,461	366,156
Notionals, protection sold	314,820	337,583
After 5 years
Credit Risk Derivatives
Fair values, receivable	1,829	1,537
Fair values, payable	1,518	1,430
Notionals, protection purchased	80,169	45,561
Notionals, protection sold	60,722	30,242
Investment grade
Credit Risk Derivatives
Fair values, receivable	4,184	4,282
Fair values, payable	4,088	4,138
Notionals, protection purchased	458,741	444,989
Notionals, protection sold	402,141	393,115
Non-investment grade
Credit Risk Derivatives
Fair values, receivable	3,838	4,057
Fair values, payable	4,126	3,944
Notionals, protection purchased	141,280	122,638
Notionals, protection sold	112,458	103,584
Credit default swaps and options
Credit Risk Derivatives
Fair values, receivable	7,243	7,686
Fair values, payable	7,320	7,243
Notionals, protection purchased	557,482	539,522
Notionals, protection sold	505,828	491,514
Total return swaps and other
Credit Risk Derivatives
Fair values, receivable	779	653
Fair values, payable	894	839
Notionals, protection purchased	42,539	28,105
Notionals, protection sold	8,771	5,185
Interest rate swaps
Credit Risk Derivatives
Cash proceeds received for assets derecognized	5,500	4,300
Fair value of derecognized assets	5,300	4,300
Fair value gross derivative assets	168	121
Trading derivatives, liability	$ 31	$ 29