DERIVATIVES - Credit Derivatives (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($) agency	Dec. 31, 2022 USD ($)
Credit Risk Derivatives
Fair values, receivable	$ 10,042	$ 8,389
Fair values, payable	10,015	7,777
Notionals, protection purchased	781,832	641,639
Notionals, protection sold	731,188	593,136
Fair value of derivative in liability position	14,000	18,000
Fair value of collateral already posted	$ 12,000	15,000
Number of rating agencies | agency	3
Additional collateral to be posted	$ 600
Collateral to be segregated	22
Aggregate cash obligations and collateral requirements	600
Fair value gross derivative assets	292,519	346,545
Purchased
Credit Risk Derivatives
Fair values, receivable	4,849	5,094
Fair values, payable	5,680	3,573
Sold
Credit Risk Derivatives
Fair values, receivable	5,193	3,295
Fair values, payable	4,335	4,204
Within 1 year
Credit Risk Derivatives
Fair values, receivable	1,007	1,753
Fair values, payable	1,650	1,801
Notionals, protection purchased	167,412	147,031
Notionals, protection sold	167,358	148,721
From 1 to 5 years
Credit Risk Derivatives
Fair values, receivable	6,146	4,577
Fair values, payable	5,885	4,134
Notionals, protection purchased	509,256	443,113
Notionals, protection sold	476,327	407,293
After 5 years
Credit Risk Derivatives
Fair values, receivable	2,889	2,059
Fair values, payable	2,480	1,842
Notionals, protection purchased	105,164	51,495
Notionals, protection sold	87,503	37,122
Investment grade
Credit Risk Derivatives
Fair values, receivable	4,892	3,796
Fair values, payable	4,406	2,970
Notionals, protection purchased	621,216	499,339
Notionals, protection sold	582,066	462,873
Non-investment grade
Credit Risk Derivatives
Fair values, receivable	5,150	4,593
Fair values, payable	5,609	4,807
Notionals, protection purchased	160,616	142,300
Notionals, protection sold	149,122	130,263
Credit default swaps and options
Credit Risk Derivatives
Fair values, receivable	9,258	6,867
Fair values, payable	9,596	7,360
Notionals, protection purchased	761,898	623,981
Notionals, protection sold	725,565	586,504
Total return swaps and other
Credit Risk Derivatives
Fair values, receivable	784	1,522
Fair values, payable	419	417
Notionals, protection purchased	19,934	17,658
Notionals, protection sold	5,623	6,632
Interest rate swaps
Credit Risk Derivatives
Cash proceeds received for assets derecognized	600	1,400
Fair value of derecognized assets	600	1,400
Fair value gross derivative assets	14	27
Trading derivatives, liability	$ 2	$ 32