SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS - Repurchase Agreements by Contractual Maturity (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	$ 584,286	$ 513,172
Securities loaned	35,806	32,622
Total	620,092	545,794
Open and overnight
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	324,208	289,907
Securities loaned	27,057	24,997
Total	351,265	314,904
Up to 30 days
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	154,200	134,870
Securities loaned	142	0
Total	154,342	134,870
31–90 days
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	47,348	35,639
Securities loaned	513	1,270
Total	47,861	36,909
Greater than 90 days
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	58,530	52,756
Securities loaned	8,094	6,355
Total	$ 66,624	$ 59,111