DERIVATIVES - Credit Derivatives (Details) $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($) agency	Dec. 31, 2021 USD ($)
Credit Risk Derivatives
Fair values, receivable	$ 11,801	$ 10,218
Fair values, payable	10,295	11,015
Notionals, protection purchased	682,144	645,996
Notionals, protection sold	638,379	572,486
Fair value of derivative in liability position	18,000	19,000
Fair value of collateral already posted	$ 15,000	16,000
Number of rating agencies | agency	3
Additional collateral to be posted	$ 1,100
Collateral to be segregated	100
Aggregate cash obligations and collateral requirements	1,200
Fair value gross derivative assets	348,255	292,628
Purchased
Credit Risk Derivatives
Fair values, receivable	9,839	3,705
Fair values, payable	2,672	7,354
Sold
Credit Risk Derivatives
Fair values, receivable	1,962	6,513
Fair values, payable	7,623	3,661
Within 1 year
Credit Risk Derivatives
Fair values, receivable	2,504	878
Fair values, payable	1,722	1,462
Notionals, protection purchased	159,569	133,866
Notionals, protection sold	160,373	115,603
From 1 to 5 years
Credit Risk Derivatives
Fair values, receivable	6,486	6,674
Fair values, payable	6,078	6,638
Notionals, protection purchased	467,326	454,617
Notionals, protection sold	437,448	413,174
After 5 years
Credit Risk Derivatives
Fair values, receivable	2,811	2,666
Fair values, payable	2,495	2,915
Notionals, protection purchased	55,249	57,513
Notionals, protection sold	40,558	43,709
Investment grade
Credit Risk Derivatives
Fair values, receivable	4,201	4,149
Fair values, payable	3,602	4,258
Notionals, protection purchased	536,771	511,652
Notionals, protection sold	499,423	448,944
Non-investment grade
Credit Risk Derivatives
Fair values, receivable	7,600	6,069
Fair values, payable	6,693	6,757
Notionals, protection purchased	145,373	134,344
Notionals, protection sold	138,956	123,542
Credit default swaps and options
Credit Risk Derivatives
Fair values, receivable	10,182	9,923
Fair values, payable	9,935	10,234
Notionals, protection purchased	667,694	628,136
Notionals, protection sold	631,332	565,131
Total return swaps and other
Credit Risk Derivatives
Fair values, receivable	1,619	295
Fair values, payable	360	781
Notionals, protection purchased	14,450	17,860
Notionals, protection sold	7,047	7,355
Banks
Credit Risk Derivatives
Fair values, receivable	3,507	2,375
Fair values, payable	3,767	3,031
Notionals, protection purchased	111,649	108,415
Notionals, protection sold	115,903	103,756
Broker-dealers
Credit Risk Derivatives
Fair values, receivable	2,872	1,962
Fair values, payable	1,865	1,139
Notionals, protection purchased	46,453	44,364
Notionals, protection sold	39,567	40,068
Non-financial
Credit Risk Derivatives
Fair values, receivable	73	113
Fair values, payable	22	306
Notionals, protection purchased	2,161	2,785
Notionals, protection sold	1,515	2,728
Insurance and other financial institutions
Credit Risk Derivatives
Fair values, receivable	5,349	5,768
Fair values, payable	4,641	6,539
Notionals, protection purchased	521,881	490,432
Notionals, protection sold	481,394	425,934
Interest rate swaps
Credit Risk Derivatives
Cash proceeds received for assets derecognized	2,000	2,900
Fair value of derecognized assets	1,900	2,900
Fair value gross derivative assets	19	13
Trading derivatives, liability	$ 83	$ 58