Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Activities
Net Income	$ 3,263,551	$ 3,374,942	$ 2,249,242
Adjustments to Reconcile Net Income to Net Cash Provided by (Used in) Operating Activities Blackstone Funds Related
Net Realized Gains on Investments	(2,381,683)	(4,613,531)	(2,023,503)
Changes in Unrealized (Gains) Losses on Investments	4,784	(21,589)	(241,617)
Non-Cash Performance Allocations	(561,373)	105,472	(304,705)
Non-Cash Performance Allocations and Incentive Fee Compensation	1,053,690	1,491,040	867,574
Equity-Based Compensation Expense	366,928	338,687	323,651
Amortization of Intangibles	59,021	46,776	82,943
Other Non-Cash Amounts Included in Net Income	45,286	363,903	17,370
Cash Flows Due to Changes in Operating Assets and Liabilities
Cash Acquired with Consolidation of Fund Entity	31,422	13,822
Cash Relinquished with Deconsolidation of Fund Entities	(899,959)	(33,566)
Accounts Receivable	43,037	282,026	87,074
Reverse Repurchase Agreements		118,495	86,398
Due from Affiliates	(280,674)	(298,501)	(57,907)
Other Assets	(76,596)	17,377	99,108
Accrued Compensation and Benefits	(729,109)	(1,177,852)	(572,814)
Securities Sold, Not Yet Purchased	(10,125)	(62,730)	42,761
Accounts Payable, Accrued Expenses and Other Liabilities	(357,582)	(755,232)	(214,723)
Repurchase Agreements	103,362	43,516	34,286
Due to Affiliates	74,108	(9,652)	39,035
Investments Purchased	(13,881,869)	(19,573,153)	(8,798,358)
Cash Proceeds from Sale of Investments	14,179,523	18,723,355	8,195,594
Net Cash Provided by (Used in) Operating Activities	45,742	(1,626,395)	(88,591)
Investing Activities
Purchase of Furniture, Equipment and Leasehold Improvements	(18,377)	(24,347)	(21,826)
Net Cash Paid for Acquisitions, Net of Cash Acquired	(98,219)	(168,913)
Net Cash Used in Investing Activities	(116,596)	(193,260)	(21,826)
Financing Activities
Distributions to Non-Controlling Interest Holders in Consolidated Entities	(762,588)	(813,987)	(533,925)
Contributions from Non-Controlling Interest Holders in Consolidated Entities	836,922	759,907	329,005
Payments Under Tax Receivable Agreement		(135,831)	(78,985)
Net Settlement of Vested Common Units and Repurchase of Common and Blackstone Holdings Partnership Units	(567,161)	(30,192)	(27,623)
Proceeds from Loans Payable	3,218,399	7,600,153	3,321,081
Repayment and Repurchase of Loans Payable	(1,009,354)	(1,766,129)	(420,714)
Distributions to Unitholders	(3,046,404)	(2,842,582)	(2,018,669)
Net Cash Provided by (Used in) Financing Activities	(1,330,186)	2,771,339	570,170
Effect of Exchange Rate Changes on Cash and Cash Equivalents, Cash Held by Blackstone Funds and Other, and Restricted Cash	9,712	123,850	(34,059)
Cash and Cash Equivalents, Cash Held by Blackstone Funds and Other, and Restricted Cash
Net Increase (Decrease)	(1,391,328)	1,075,534	425,694
Beginning of Period	3,936,489	2,860,955	2,435,261
End of Period	2,545,161	3,936,489	2,860,955
Supplemental Disclosure of Cash Flows Information
Payments for Interest	169,872	160,178	151,948
Payments for Income Taxes	192,790	106,032	65,790
Supplemental Disclosure of Non-Cash Investing and Financing Activities
Non-Cash Contributions from Non-Controlling Interest Holders	10,435	1,112	1,155
Non-Cash Distributions to Non-Controlling Interest Holders	(18,723)	(69,721)	(13,536)
Non-Cash Consideration for Acquisition	(50,803)	(95,262)
Net Assets Related to the Consolidation of Certain Fund Entities		387,006
Notes Issuance Costs		5,582	5,491
Transfer of Interests to Non-Controlling Interest Holders	20,188	(6,016)	(8,278)
Change in The Blackstone Group L.P.'s Ownership Interest	66,799	(15,197)	7,881
Net Settlement of Vested Common Units	136,238	127,392	101,898
Conversion of Blackstone Holdings Units to Common Units	100,397	59,334	77,520
Acquisition of Ownership Interests from Non-Controlling Interest Holders Deferred Tax Asset	(93,391)	(74,487)	(59,304)
Due to Affiliates	79,484	63,430	53,935
Partners' Capital	13,907	$ 11,057	$ 5,369
Issuance of New Units	$ 24,970