NET GAINS (LOSSES) FROM INVESTMENT ACTIVITIES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Gain (Loss) on Securities [Line Items]
Net Realized Gains (Losses)	$ 203,162	$ 241,056	$ 407,120	$ 426,220
Net Unrealized Gains (Losses)	(207,752)	425,675	1,830,153	1,829,898
Total	(4,590)	666,731	2,237,273	2,256,118
Private Equity
Gain (Loss) on Securities [Line Items]
Net Realized Gains (Losses)	84,903	137,486	177,969	179,328
Net Unrealized Gains (Losses)	(30,416)	434,651	1,827,599	1,089,947
Total	54,487	572,137	2,005,568	1,269,275
Credit
Gain (Loss) on Securities [Line Items]
Net Realized Gains (Losses)	27,297	11,306	(44,653)	(132,391)
Net Unrealized Gains (Losses)	(203,735)	(260,929)	(165,143)	(289,642)
Total	(176,438)	(249,623)	(209,796)	(422,033)
Investments of Consolidated CFEs
Gain (Loss) on Securities [Line Items]
Net Realized Gains (Losses)	(6,874)	(1,132)	(20,545)	(79,184)
Net Unrealized Gains (Losses)	(94,137)	70,963	203,141	(13,954)
Total	(101,011)	69,831	182,596	(93,138)
Real Assets
Gain (Loss) on Securities [Line Items]
Net Realized Gains (Losses)	25,760	52,683	72,404	76,033
Net Unrealized Gains (Losses)	(123,618)	42,865	(53,622)	248,375
Total	(97,858)	95,548	18,782	324,408
Equity Method - Other
Gain (Loss) on Securities [Line Items]
Net Realized Gains (Losses)	(2,905)	14,765	64,445	(139,178)
Net Unrealized Gains (Losses)	126,165	111,482	368,510	465,246
Total	123,260	126,247	432,955	326,068
Other Investments
Gain (Loss) on Securities [Line Items]
Net Realized Gains (Losses)	84,086	(12,750)	75,567	(330,850)
Net Unrealized Gains (Losses)	(158,591)	18,108	(221,603)	(3,394)
Total	(74,505)	5,358	(146,036)	(334,244)
Foreign Exchange Forward Contracts and Options
Gain (Loss) on Securities [Line Items]
Net Realized Gains (Losses)	29,935	(26,862)	74,996	(66,795)
Net Unrealized Gains (Losses)	166,813	47,222	219,825	161,793
Total	196,748	20,360	294,821	94,998
Securities Sold Short
Gain (Loss) on Securities [Line Items]
Net Realized Gains (Losses)	(10,465)	86,188	34,087	614,515
Net Unrealized Gains (Losses)	28,751	(9,901)	(36,065)	(51,232)
Total	18,286	76,287	(1,978)	563,283
Other Derivatives
Gain (Loss) on Securities [Line Items]
Net Realized Gains (Losses)	0	(1,063)	1,465	2,579
Net Unrealized Gains (Losses)	(12,572)	2,704	(35,179)	5,740
Total	(12,572)	1,641	(33,714)	8,319
Debt Obligations and Other
Gain (Loss) on Securities [Line Items]
Net Realized Gains (Losses)	(28,575)	(19,565)	(28,615)	302,163
Net Unrealized Gains (Losses)	93,588	(31,490)	(277,310)	217,019
Total	$ 65,013	$ (51,055)	$ (305,925)	$ 519,182