SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS - Repurchase Agreements by Contractual Maturity (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	$ 564,959	$ 513,172
Deposits received for securities loaned	34,203	32,622
Total	599,162	545,794
Open and overnight
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	312,541	289,907
Deposits received for securities loaned	26,184	24,997
Total	338,725	314,904
Up to 30 days
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	153,322	134,870
Deposits received for securities loaned	0	0
Total	153,322	134,870
31–90 days
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	38,433	35,639
Deposits received for securities loaned	347	1,270
Total	38,780	36,909
Greater than 90 days
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	60,663	52,756
Deposits received for securities loaned	7,672	6,355
Total	$ 68,335	$ 59,111