SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS - Repurchase Agreements by Contractual Maturity (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	$ 477,635	$ 296,218
Deposits received for securities loaned	29,365	33,269
Total	507,000	329,487
Open and overnight
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	248,681	138,710
Deposits received for securities loaned	20,634	25,388
Total	269,315	164,098
Up to 30 days
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	142,516	86,819
Deposits received for securities loaned	242	267
Total	142,758	87,086
31–90 days
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	29,711	25,119
Deposits received for securities loaned	556	2,121
Total	30,267	27,240
Greater than 90 days
Assets Sold under Agreements to Repurchase
Securities sold under agreements to repurchase	56,727	45,570
Deposits received for securities loaned	7,933	5,493
Total	$ 64,660	$ 51,063