NET GAINS (LOSSES) FROM INVESTMENT ACTIVITIES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Gain (Loss) on Securities [Line Items]
Net Realized Gains (Losses)	$ 241,056	$ (47,414)	$ 426,220	$ (2,662)
Net Unrealized Gains (Losses)	425,675	99,418	1,829,898	895,727
Total	666,731	52,004	2,256,118	893,065
Private Equity
Gain (Loss) on Securities [Line Items]
Net Realized Gains (Losses)	137,486	74,483	179,328	202,549
Net Unrealized Gains (Losses)	434,651	77,299	1,089,947	372,335
Total	572,137	151,782	1,269,275	574,884
Credit
Gain (Loss) on Securities [Line Items]
Net Realized Gains (Losses)	11,306	(19,470)	(132,391)	(417,864)
Net Unrealized Gains (Losses)	(260,929)	(21,780)	(289,642)	393,055
Total	(249,623)	(41,250)	(422,033)	(24,809)
Investments of Consolidated CFEs
Gain (Loss) on Securities [Line Items]
Net Realized Gains (Losses)	(1,132)	(83,797)	(79,184)	(88,677)
Net Unrealized Gains (Losses)	70,963	43,905	(13,954)	71,952
Total	69,831	(39,892)	(93,138)	(16,725)
Real Assets
Gain (Loss) on Securities [Line Items]
Net Realized Gains (Losses)	52,683	24,479	76,033	(34,208)
Net Unrealized Gains (Losses)	42,865	56,217	248,375	233,608
Total	95,548	80,696	324,408	199,400
Equity Method - Other
Gain (Loss) on Securities [Line Items]
Net Realized Gains (Losses)	14,765	6,032	(139,178)	22,215
Net Unrealized Gains (Losses)	111,482	(6,167)	465,246	46,200
Total	126,247	(135)	326,068	68,415
Other Investments
Gain (Loss) on Securities [Line Items]
Net Realized Gains (Losses)	(12,750)	(33,508)	(330,850)	(237,496)
Net Unrealized Gains (Losses)	18,108	7,054	(3,394)	108,654
Total	5,358	(26,454)	(334,244)	(128,842)
Foreign Exchange Forward Contracts and Options
Gain (Loss) on Securities [Line Items]
Net Realized Gains (Losses)	(26,862)	(26,043)	(66,795)	(7,975)
Net Unrealized Gains (Losses)	47,222	(69,046)	161,793	(311,427)
Total	20,360	(95,089)	94,998	(319,402)
Securities Sold Short
Gain (Loss) on Securities [Line Items]
Net Realized Gains (Losses)	86,188	(7,785)	614,515	497,926
Net Unrealized Gains (Losses)	(9,901)	14,369	(51,232)	66,037
Total	76,287	6,584	563,283	563,963
Other Derivatives
Gain (Loss) on Securities [Line Items]
Net Realized Gains (Losses)	(1,063)	(148)	2,579	(6,027)
Net Unrealized Gains (Losses)	2,704	(5,049)	5,740	(10,602)
Total	1,641	(5,197)	8,319	(16,629)
Debt Obligations and Other
Gain (Loss) on Securities [Line Items]
Net Realized Gains (Losses)	(19,565)	18,343	302,163	66,895
Net Unrealized Gains (Losses)	(31,490)	2,616	217,019	(74,085)
Total	$ (51,055)	$ 20,959	$ 519,182	$ (7,190)