DERIVATIVES - Credit Derivatives (Details) $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($) agency	Dec. 31, 2022 USD ($)
Credit Risk Derivatives
Fair values, receivable	$ 10,839	$ 8,389
Fair values, payable	10,728	7,777
Notionals, protection purchased	789,558	641,639
Notionals, protection sold	725,634	593,136
Fair value of derivative in liability position	16,000	18,000
Fair value of collateral already posted	$ 14,000	15,000
Number of rating agencies | agency	3
Additional collateral to be posted	$ 800
Collateral to be segregated	16
Aggregate cash obligations and collateral requirements	800
Fair value gross derivative assets	312,754	346,545
Purchased
Credit Risk Derivatives
Fair values, receivable	4,249	5,094
Fair values, payable	7,011	3,573
Sold
Credit Risk Derivatives
Fair values, receivable	6,590	3,295
Fair values, payable	3,717	4,204
Within 1 year
Credit Risk Derivatives
Fair values, receivable	1,242	1,753
Fair values, payable	1,642	1,801
Notionals, protection purchased	164,261	147,031
Notionals, protection sold	146,723	148,721
From 1 to 5 years
Credit Risk Derivatives
Fair values, receivable	7,503	4,577
Fair values, payable	7,102	4,134
Notionals, protection purchased	570,605	443,113
Notionals, protection sold	538,159	407,293
After 5 years
Credit Risk Derivatives
Fair values, receivable	2,094	2,059
Fair values, payable	1,984	1,842
Notionals, protection purchased	54,692	51,495
Notionals, protection sold	40,752	37,122
Investment grade
Credit Risk Derivatives
Fair values, receivable	5,491	3,796
Fair values, payable	4,977	2,970
Notionals, protection purchased	619,717	499,339
Notionals, protection sold	574,059	462,873
Non-investment grade
Credit Risk Derivatives
Fair values, receivable	5,348	4,593
Fair values, payable	5,751	4,807
Notionals, protection purchased	169,841	142,300
Notionals, protection sold	151,575	130,263
Credit default swaps and options
Credit Risk Derivatives
Fair values, receivable	10,015	6,867
Fair values, payable	10,352	7,360
Notionals, protection purchased	768,300	623,981
Notionals, protection sold	721,289	586,504
Total return swaps and other
Credit Risk Derivatives
Fair values, receivable	824	1,522
Fair values, payable	376	417
Notionals, protection purchased	21,258	17,658
Notionals, protection sold	4,345	6,632
Interest rate swaps
Credit Risk Derivatives
Cash proceeds received for assets derecognized	2,700	1,400
Fair value of derecognized assets	2,700	1,400
Fair value gross derivative assets	39	27
Trading derivatives, liability	$ 24	$ 32