SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS - Offsetting (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Securities purchased under agreements to resell
Gross amounts of recognized assets	$ 441,610	$ 403,663
Gross amounts offset on the Consolidated Balance Sheet	136,181	112,391
Net amounts of assets included on the Consolidated Balance Sheet	305,429	291,272
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default	228,356	204,077
Net amounts	77,073	87,195
Deposits paid for securities borrowed
Gross amounts of recognized assets	95,070	88,817
Gross amounts offset on the Consolidated Balance Sheet	16,271	14,652
Net amounts of assets included on the Consolidated Balance Sheet	78,799	74,165
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default	15,857	13,844
Net amounts	62,942	60,321
Total
Gross amounts of recognized assets	536,680	492,480
Gross amounts offset on the Consolidated Balance Sheet	152,452	127,043
Net amounts of assets included on the Consolidated Balance Sheet	384,228	365,437
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default	244,213	217,921
Net amounts	140,015	147,516
Securities sold under agreements to repurchase
Gross amounts of recognized liabilities	378,526	296,218
Gross amounts offset on the Consolidated Balance Sheet	136,181	112,391
Net amounts of liabilities included on the Consolidated Balance Sheet	242,345	183,827
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default	114,250	71,635
Net amounts	128,095	112,192
Deposits received for securities loaned
Gross amounts of recognized liabilities	31,607	33,269
Gross amounts offset on the Consolidated Balance Sheet	16,271	14,652
Net amounts of liabilities included on the Consolidated Balance Sheet	15,336	18,617
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default	3,209	2,542
Net amounts	12,127	16,075
Total
Gross amounts of recognized liabilities	410,133	329,487
Gross amounts offset on the Consolidated Balance Sheet	152,452	127,043
Net amounts of liabilities included on the Consolidated Balance Sheet	257,681	202,444
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default	117,459	74,177
Net amounts	$ 140,222	$ 128,267