SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Carrying Amounts and Classifications of Consolidated Assets (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Variable Interest Entity
Cash	$ 26,917	$ 27,342	$ 25,763
Trading account assets	446,339	411,756
Investments	508,276	519,085
Other assets	99,569	95,963
Total assets	2,405,686	2,411,834
Unconsolidated VIEs
Variable Interest Entity
Cash	0	0
Trading account assets	3,900	1,900
Investments	5,000	8,300
Total loans, net of allowance	51,100	51,800
Other assets	600	600
Total assets	$ 60,600	$ 62,600