SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS - Repurchase Agreements by Contractual Maturity (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	$ 378,526	$ 296,218
Deposits received for securities loaned	31,607	33,269
Total	410,133	329,487
Open and overnight
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	199,698	138,710
Deposits received for securities loaned	22,487	25,388
Total	222,185	164,098
Up to 30 days
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	99,981	86,819
Deposits received for securities loaned	150	267
Total	100,131	87,086
31–90 days
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	32,302	25,119
Deposits received for securities loaned	657	2,121
Total	32,959	27,240
Greater than 90 days
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	46,545	45,570
Deposits received for securities loaned	8,313	5,493
Total	$ 54,858	$ 51,063