SECURITIES BORROWED, LOANED AND SUBJECT TO REPURCHASE AGREEMENTS - Offsetting (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Securities purchased under agreements to resell
Gross amounts of recognized assets	$ 499,862	$ 403,663
Gross amounts offset on the Consolidated Balance Sheet	235,024	112,391
Net amounts of assets included on the Consolidated Balance Sheet	264,838	291,272
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default	239,448	204,077
Net amounts	25,390	87,195
Deposits paid for securities borrowed
Gross amounts of recognized assets	85,480	88,817
Gross amounts offset on the Consolidated Balance Sheet	15,206	14,652
Net amounts of assets included on the Consolidated Balance Sheet	70,274	74,165
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default	18,388	13,844
Net amounts	51,886	60,321
Total
Gross amounts of recognized assets	585,342	492,480
Gross amounts offset on the Consolidated Balance Sheet	250,230	127,043
Net amounts of assets included on the Consolidated Balance Sheet	335,112	365,437
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default	257,836	217,921
Net amounts	77,276	147,516
Securities sold under agreements to repurchase
Gross amounts of recognized liabilities	477,635	296,218
Gross amounts offset on the Consolidated Balance Sheet	235,024	112,391
Net amounts of liabilities included on the Consolidated Balance Sheet	242,611	183,827
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default	155,168	71,635
Net amounts	87,443	112,192
Deposits received for securities loaned
Gross amounts of recognized liabilities	29,365	33,269
Gross amounts offset on the Consolidated Balance Sheet	15,206	14,652
Net amounts of liabilities included on the Consolidated Balance Sheet	14,159	18,617
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default	3,877	2,542
Net amounts	10,282	16,075
Total
Gross amounts of recognized liabilities	507,000	329,487
Gross amounts offset on the Consolidated Balance Sheet	250,230	127,043
Net amounts of liabilities included on the Consolidated Balance Sheet	256,770	202,444
Amounts not offset on the Consolidated Balance Sheet but eligible for offsetting upon counterparty default	159,045	74,177
Net amounts	$ 97,725	$ 128,267

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