SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS - Offsetting (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Securities purchased under agreements to resell
Gross amounts of recognized assets	$ 371,889	$ 367,594
Gross amounts offset on the Consolidated Balance Sheet	99,999	131,342
Net amounts of assets included on the Consolidated Balance Sheet	271,890	236,252
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default	179,718	205,349
Net amounts	92,172	30,903
Deposits paid for securities borrowed
Gross amounts of recognized assets	98,890	107,041
Gross amounts offset on the Consolidated Balance Sheet	9,419	15,999
Net amounts of assets included on the Consolidated Balance Sheet	89,471	91,042
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default	12,690	17,326
Net amounts	76,781	73,716
Total
Gross amounts of recognized assets	470,779	474,635
Gross amounts offset on the Consolidated Balance Sheet	109,418	147,341
Net amounts of assets included on the Consolidated Balance Sheet	361,361	327,294
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default	192,408	222,675
Net amounts	168,953	104,619
Securities sold under agreements to repurchase
Gross amounts of recognized liabilities	277,976	305,597
Gross amounts offset on the Consolidated Balance Sheet	99,999	131,342
Net amounts of liabilities included on the Consolidated Balance Sheet	177,977	174,255
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default	72,056	85,184
Net amounts	105,921	89,071
Deposits received for securities loaned
Gross amounts of recognized liabilities	29,914	33,029
Gross amounts offset on the Consolidated Balance Sheet	9,419	15,999
Net amounts of liabilities included on the Consolidated Balance Sheet	20,495	17,030
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default	2,517	2,868
Net amounts	17,978	14,162
Total
Gross amounts of recognized liabilities	307,890	338,626
Gross amounts offset on the Consolidated Balance Sheet	109,418	147,341
Net amounts of liabilities included on the Consolidated Balance Sheet	198,472	191,285
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default	74,573	88,052
Net amounts	$ 123,899	$ 103,233