Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating Activities
Net Income	$ 654,875	$ 427,589
Blackstone Funds Related
Unrealized Appreciation on Investments Allocable to Non-Controlling Interests in Consolidated Entities	(108,233)	(125,897)
Net Realized Gains on Investments	(543,367)	(425,967)
Changes in Unrealized Gains on Investments Allocable to The Blackstone Group L.P.	3,833	(86,763)
Non-Cash Performance Fees	(276,508)	(134,220)
Non-Cash Performance Fee Compensation	237,294	239,896
Equity-Based Compensation Expense	194,645	195,343
Excess Tax Benefits Related to Equity-Based Compensation	(16,513)
Amortization of Intangibles	26,258	22,913
Other Non-Cash Amounts Included in Net Income	53,939	51,607
Cash Flows Due to Changes in Operating Assets and Liabilities
Cash Held by Blackstone Funds and Other	(52,120)	153,381
Cash Relinquished in Deconsolidation and Liquidation of Partnership	(75,327)	(103,985)
Accounts Receivable	364,988	178,416
Reverse Repurchase Agreements	(13,724)	(10,025)
Due from Affiliates	275,550	44,438
Other Assets	(81,645)	9,333
Accrued Compensation and Benefits	(288,791)	(289,260)
Securities Sold, Not Yet Purchased	70,318	(12,762)
Accounts Payable, Accrued Expenses and Other Liabilities	(223,761)	(386,227)
Repurchase Agreements	(138,678)	(39,412)
Due to Affiliates	(28,278)	(53,020)
Treasury Cash Management Strategies
Investments Purchased	(808,884)	(931,481)
Cash Proceeds from Sale of Investments	1,020,997	1,199,355
Blackstone Funds Related
Investments Purchased	(1,652,358)	(1,564,358)
Cash Proceeds from Sale or Pay Down of Investments	2,385,748	2,745,408
Net Cash Provided by Operating Activities	980,258	1,104,302
Investing Activities
Purchase of Furniture, Equipment and Leasehold Improvements	(6,123)	(7,344)
Changes in Restricted Cash	5,841	5,852
Net Cash Used in Investing Activities	(282)	(1,492)
Financing Activities
Distributions to Non-Controlling Interest Holders in Consolidated Entities	(258,361)	(197,563)
Contributions from Non-Controlling Interest Holders in Consolidated Entities	419,332	186,147
Purchase of Interests from Certain Non-Controlling Interest Holders	(6)	(11)
Payments Under Tax Receivable Agreement	(80,565)
Net Settlement of Vested Common Units and Repurchase of Common and Blackstone Holdings Partnership Units	(19,129)	(9,741)
Excess Tax Benefits Related to Equity-Based Compensation	16,513
Proceeds from Loans Payable	2,206	479
Repayment and Repurchase of Loans Payable	(6,488)	(435)
Distributions to Unitholders	(708,862)	(561,515)
Blackstone Funds Related
Proceeds from Loans Payable		1,844
Repayment of Loans Payable	(389,097)	(416,241)
Net Cash Used in Financing Activities	(1,024,457)	(997,036)
Effect of Exchange Rate Changes on Cash and Cash Equivalents	4	(10)
Net Increase (Decrease) in Cash and Cash Equivalents	(44,477)	105,764
Cash and Cash Equivalents, Beginning of Period	831,998	709,502
Cash and Cash Equivalents, End of Period	787,521	815,266
Supplemental Disclosure of Cash Flows Information
Payments for Interest	49,282	53,785
Payments for Income Taxes	47,547	17,212
Supplemental Disclosure of Non-Cash Investing and Financing Activities
Non-Cash Contributions from Non-Controlling Interest Holders	10,933
Non-Cash Distributions to Non-Controlling Interest Holders	(11,069)
Net Activities Related to Capital Transactions of Consolidated Blackstone Funds	808	109
Net Assets Related to the Consolidation of CLO Vehicles	8,398
Net Assets Related to the Consolidation of Certain Fund Entities	35,433
In-kind Contribution of Capital		2,323
Transfer of Interests to Non-Controlling Interest Holders	(212)	(207)
Change in The Blackstone Group L.P.'s Ownership Interest	(10,354)	(9,748)
Net Settlement of Vested Common Units	22,325	9,981
Conversion of Blackstone Holdings Partnership Units to Common Units	45,050	1,902
Acquisition of Ownership Interests from Non-Controlling Interest Holders
Deferred Tax Asset	(46,023)	(78,972)
Due to Affiliates	33,378	1,272
Partners' Capital	$ 12,645	$ 77,700