Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating Activities
Net Income (Loss)	$ 314,920	$ 1,364,001
Blackstone Funds Related
Unrealized Appreciation on Investments Allocable to Non-Controlling Interests in Consolidated Entities	(35,684)	(87,529)
Net Realized Gains on Investments	(253,857)	(1,479,010)
Changes in Unrealized (Gains) Losses on Investments Allocable to The Blackstone Group L.P.	17,363	(61,239)
Non-Cash Performance Fees	(15,077)	(315,065)
Non-Cash Performance Fee Compensation	106,076	403,816
Equity-Based Compensation Expense	79,840	272,335
Excess Tax Benefits Related to Equity-Based Compensation	(11,690)	(23,834)
Amortization of Intangibles	22,828	24,800
Other Non-Cash Amounts Included in Net Income	17,372	107,020
Cash Flows Due to Changes in Operating Assets and Liabilities
Cash Held by Blackstone Funds and Other	51,134	350,505
Cash Relinquished in Deconsolidation and Liquidation of Partnership		(442,370)
Accounts Receivable	(21,063)	(47,474)
Reverse Repurchase Agreements	159,592	(79,628)
Due from Affiliates	124,519	(1,928)
Other Assets	52,381	(109,651)
Accrued Compensation and Benefits	(289,532)	(436,354)
Securities Sold, Not Yet Purchased	(76,620)	76,698
Accounts Payable, Accrued Expenses and Other Liabilities	(264,198)	(528,826)
Repurchase Agreements	8,620	57,152
Due to Affiliates	(3,642)	(90,700)
Net Cash Provided by Operating Activities	208,531	479,286
Investing Activities
Purchase of Furniture, Equipment and Leasehold Improvements	(9,934)	(3,275)
Changes in Restricted Cash	5,843	5,843
Net Cash Provided by (Used in) Investing Activities	(4,091)	2,568
Financing Activities
Distributions to Non-Controlling Interest Holders in Consolidated Entities	(68,696)	(229,240)
Contributions from Non-Controlling Interest Holders in Consolidated Entities	88,079	55,274
Payments Under Tax Receivable Agreement	(78,985)	(82,830)
Net Settlement of Vested Common Units and Repurchase of Common and Blackstone Holdings Partnership Units	(13,262)	(27,632)
Excess Tax Benefits Related to Equity-Based Compensation	11,690	23,834
Proceeds from Loans Payable		23
Repayment and Repurchase of Loans Payable		(2,410)
Distributions to Unitholders	(745,140)	(970,960)
Blackstone Funds Related
Proceeds from Loans Payable	158,456	507,832
Repayment of Loans Payable	(21,327)	(32,805)
Net Cash Used in Financing Activities	(669,185)	(758,914)
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(27)	60
Net Decrease in Cash and Cash Equivalents	(464,772)	(277,000)
Cash and Cash Equivalents, Beginning of Period	1,837,324	1,412,472
Cash and Cash Equivalents, End of Period	1,372,552	1,135,472
Supplemental Disclosure of Cash Flows Information
Payments for Interest	60,907	49,484
Payments for Income Taxes	6,995	70,609
Supplemental Disclosure of Non-Cash Investing and Financing Activities
Non-Cash Contributions from Non-Controlling Interest Holders	967	601
Transfer of Interests to Non-Controlling Interest Holders	(5,312)	(10,163)
Change in The Blackstone Group L.P.'s Ownership Interest	3,618	68,361
Net Settlement of Vested Common Units	59,605	51,228
Conversion of Blackstone Holdings Partnership Units to Common Units	18,931	46,123
Acquisition of Ownership Interests from Non-Controlling Interest Holders
Deferred Tax Asset	(14,427)	(54,313)
Due to Affiliates	15,572	45,200
Partners' Capital	(1,145)	9,113
Blackstone's Treasury Cash Management Strategies
Cash Flows Due to Changes in Operating Assets and Liabilities
Investments Purchased	(590,772)	(1,063,714)
Cash Proceeds from Sale of Investments	590,649	1,120,428
Investments Of Consolidated Blackstone Funds
Cash Flows Due to Changes in Operating Assets and Liabilities
Investments Purchased	(742,280)	(195,719)
Cash Proceeds from Sale or Pay Down of Investments	$ 967,652	$ 1,665,572