SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS - Repurchase Agreements by Class of Collateral (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Assets Sold under Agreements to Repurchase
Repurchase agreements	$ 277,976	$ 305,597
Securities lending agreements	29,914	33,029
Total	307,890	338,626
U.S. Treasury and federal agency securities
Assets Sold under Agreements to Repurchase
Repurchase agreements	92,263	85,861
Securities lending agreements	0	90
Total	92,263	85,951
State and municipal securities
Assets Sold under Agreements to Repurchase
Repurchase agreements	993	1,053
Securities lending agreements	0	0
Total	993	1,053
Foreign government securities
Assets Sold under Agreements to Repurchase
Repurchase agreements	125,611	133,352
Securities lending agreements	127	212
Total	125,738	133,564
Corporate bonds
Assets Sold under Agreements to Repurchase
Repurchase agreements	15,494	20,398
Securities lending agreements	133	152
Total	15,627	20,550
Equity securities
Assets Sold under Agreements to Repurchase
Repurchase agreements	11,428	25,653
Securities lending agreements	29,637	32,517
Total	41,065	58,170
Mortgage-backed securities
Assets Sold under Agreements to Repurchase
Repurchase agreements	23,506	33,573
Securities lending agreements	0	0
Total	23,506	33,573
Asset-backed securities
Assets Sold under Agreements to Repurchase
Repurchase agreements	1,683	1,681
Securities lending agreements	0	0
Total	1,683	1,681
Other
Assets Sold under Agreements to Repurchase
Repurchase agreements	6,998	4,026
Securities lending agreements	17	58
Total	$ 7,015	$ 4,084