SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS - Securities (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Abstract]
Securities purchased under agreements to resell	$ 192,950	$ 267,319
Securities borrowed	81,115	78,408
Total, net	274,065	345,727
Allowance for credit losses on securities purchased and borrowed	(3)	(27)
Total, net of allowance	274,062	345,700
Securities sold under agreements to repurchase	239,767	264,958
Securities loaned	14,988	13,149
Total, net	254,755	278,107
Securities-for-securities lending transactions	$ 5,200	$ 4,300