Consolidated Statement of Changes in Partners' Capital - USD ($) $ in Thousands	Total	Common Units	Accumulated Other Comprehensive (Loss)	Parent	Noncontrolling Interest Consolidated Entities	Noncontrolling Interest Blackstone Holdings
Beginning Balance at Dec. 31, 2016	$ 12,322,091	$ 6,521,531	$ (62,887)	$ 6,458,644	$ 2,428,964	$ 3,434,483
Beginning Balance, Units at Dec. 31, 2016		643,459,542
Net Income	999,640	$ 451,909		451,909	138,685	409,046
Currency Translation Adjustment	11,504		7,686	7,686	3,818
Capital Contributions	238,203				238,203
Capital Distributions	(750,380)	(308,925)		(308,925)	(156,819)	(284,636)
Transfer of Non-Controlling Interests in Consolidated Entities	(2,062)				(2,062)
Deferred Tax Effects Resulting from Acquisition of Ownership Interests from Non-Controlling Interest Holders	2,297	2,297		2,297
Equity-Based Compensation	80,058	43,703		43,703		36,355
Net Delivery of Vested Blackstone Holdings Partnership Units and Blackstone Common Units	(12,730)	$ (11,940)		(11,940)		(790)
Net Delivery of Vested Blackstone Holdings Partnership Units and Blackstone Common Units, Units		3,780,081
Change in The Blackstone Group L.P.'s Ownership Interest	10,789	$ (10,789)		(10,789)		10,789
Conversion of Blackstone Holdings Partnership Units to Blackstone Common Units		$ 13,522		13,522		(13,522)
Conversion of Blackstone Holdings Partnership Units to Blackstone Common Units, Units		2,112,784
Ending Balance at Mar. 31, 2017	12,888,621	$ 6,701,308	(55,201)	6,646,107	2,650,789	3,591,725
Ending Balance, Units at Mar. 31, 2017		649,352,407
Beginning Balance at Dec. 31, 2016	185,390
Net Income	2,000
Capital Contributions	11,484
Capital Distributions	(10,216)
Ending Balance at Mar. 31, 2017	188,658
Beginning Balance at Dec. 31, 2017	13,512,147	$ 6,668,511	(34,018)	6,634,493	3,253,148	3,624,506
Beginning Balance, Units at Dec. 31, 2017		659,526,093
Transfer Out Due to Deconsolidation of Fund Entities	(197,091)				(197,091)
Net Income	843,579	$ 367,872		367,872	155,499	320,208
Currency Translation Adjustment	4,426		6,815	6,815	(2,389)
Capital Contributions	223,509				223,509
Capital Distributions	(1,184,440)	(570,570)		(570,570)	(121,711)	(492,159)
Transfer of Non-Controlling Interests in Consolidated Entities	22,989				22,989
Deferred Tax Effects Resulting from Acquisition of Ownership Interests from Non-Controlling Interest Holders	3,520	3,520		3,520
Equity-Based Compensation	74,541	41,439		41,439		33,102
Net Delivery of Vested Blackstone Holdings Partnership Units and Blackstone Common Units	(12,351)	$ (11,870)		(11,870)		(481)
Net Delivery of Vested Blackstone Holdings Partnership Units and Blackstone Common Units, Units		3,077,431
Change in The Blackstone Group L.P.'s Ownership Interest	6,124	$ (6,124)		(6,124)		6,124
Conversion of Blackstone Holdings Partnership Units to Blackstone Common Units		$ 23,661		23,661		(23,661)
Conversion of Blackstone Holdings Partnership Units to Blackstone Common Units, Units		3,458,489
Issuance of Common Units, Units		750,739
Ending Balance at Mar. 31, 2018	13,315,799	$ 6,541,409	$ (27,203)	6,514,206	$ 3,333,954	$ 3,467,639
Ending Balance, Units at Mar. 31, 2018		666,812,752
Beginning Balance at Dec. 31, 2017	210,944
Net Income	(1,275)
Capital Contributions	1,100
Capital Distributions	(1,759)
Ending Balance at Mar. 31, 2018	209,010
Issuance of Common Units	$ 24,970	$ 24,970		$ 24,970