Reconciliation of Total Segments to Income (Loss) Before Provision for Taxes and Total Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenues	$ 1,526,668		$ 1,246,473
Expenses	887,851		835,101
Other Income	70,155		67,210
Economic Income (Loss)	708,972		478,582
Total Assets	30,028,545				29,678,606
Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,508,819		1,259,653
Expenses	683,573		621,316
Economic Income (Loss)	825,246		638,337
Total Assets	16,458,341
Consolidation Adjustments and Reconciling Items
Segment Reporting Information [Line Items]
Revenues	17,849	[1]	(13,180)	[1]
Expenses	204,278	[2]	213,785	[2]
Other Income	70,155	[3]	67,210	[3]
Economic Income (Loss)	(116,274)	[4]	(159,755)	[4]
Total Assets	$ 13,570,204	[5]

[1] The Revenues adjustment represents management and performance fees earned from Blackstone Funds which were eliminated in consolidation to arrive at Blackstone consolidated revenues and non-segment related Investment Income, which is included in Blackstone consolidated revenues.

[2] The Expenses adjustment represents the addition of expenses of the consolidated Blackstone Funds to the Blackstone unconsolidated expenses, amortization of intangibles and expenses related to transaction-related equity-based compensation to arrive at Blackstone consolidated expenses.

[3] The Other Income adjustment results from the following:

[4] The reconciliation of Economic Income to Income Before Provision for Taxes as reported in the Condensed Consolidated Statements of Operations consists of the following:

[5] The Total Assets adjustment represents the addition of assets of the consolidated Blackstone Funds to the Blackstone unconsolidated assets to arrive at Blackstone consolidated assets.