SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Carrying Amounts and Classifications of Consolidated Assets (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Variable Interest Entity
Cash	$ 25,266	$ 27,342	$ 26,548
Trading account assets	458,072	411,756
Investments	490,671	519,085
Other assets	104,771	95,963
Total assets	2,430,663	2,411,834
Unconsolidated VIEs
Variable Interest Entity
Cash	0	0
Trading account assets	3,700	1,900
Investments	5,000	8,300
Total loans, net of allowance	52,700	51,800
Other assets	600	600
Total assets	$ 62,000	$ 62,600