SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS - Repurchase Agreements by Class of Collateral (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Assets Sold under Agreements to Repurchase
Repurchase agreements	$ 729,792	$ 563,539
Securities lending agreements	52,336	34,315
Total	782,128	597,854
U.S. Treasury and federal agency securities
Assets Sold under Agreements to Repurchase
Repurchase agreements	356,299	324,233
Securities lending agreements	0	40
Total	356,299	324,273
State and municipal securities
Assets Sold under Agreements to Repurchase
Repurchase agreements	171	183
Securities lending agreements	26	0
Total	197	183
Foreign government securities
Assets Sold under Agreements to Repurchase
Repurchase agreements	204,406	132,123
Securities lending agreements	319	1,069
Total	204,725	133,192
Corporate bonds
Assets Sold under Agreements to Repurchase
Repurchase agreements	24,963	17,467
Securities lending agreements	652	330
Total	25,615	17,797
Equity securities
Assets Sold under Agreements to Repurchase
Repurchase agreements	28,664	18,498
Securities lending agreements	51,137	32,837
Total	79,801	51,335
Mortgage-backed securities
Assets Sold under Agreements to Repurchase
Repurchase agreements	108,490	65,279
Securities lending agreements	0	0
Total	108,490	65,279
Asset-backed securities
Assets Sold under Agreements to Repurchase
Repurchase agreements	5,470	2,609
Securities lending agreements	0	23
Total	5,470	2,632
Other
Assets Sold under Agreements to Repurchase
Repurchase agreements	1,329	3,147
Securities lending agreements	202	16
Total	$ 1,531	$ 3,163