v2.4.1.9
Reconciliation of Total Segments to Income Before Provision for Taxes and Total Assets (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Segment Reporting Information [Line Items]      
Revenues $ 2,493,580us-gaap_Revenues $ 1,526,668us-gaap_Revenues  
Expenses 1,148,950us-gaap_CostsAndExpenses 887,851us-gaap_CostsAndExpenses  
Other Income 238,972us-gaap_OtherNonoperatingIncomeExpense 70,155us-gaap_OtherNonoperatingIncomeExpense  
Income Before Provision for Taxes 1,583,602us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 708,972us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest  
Total Assets 32,406,601us-gaap_Assets 30,028,545us-gaap_Assets 31,510,894us-gaap_Assets
Operating Segments      
Segment Reporting Information [Line Items]      
Revenues 2,508,719us-gaap_Revenues
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember		 1,508,819us-gaap_Revenues
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember		  
Expenses 876,936us-gaap_CostsAndExpenses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember		 683,573us-gaap_CostsAndExpenses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember		  
Income Before Provision for Taxes 1,631,783us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember		 825,246us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember		  
Total Assets 19,638,712us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember		 16,458,341us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember		  
Consolidation Adjustments and Reconciling Items      
Segment Reporting Information [Line Items]      
Revenues (15,139)us-gaap_Revenues
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember		 [1] 17,849us-gaap_Revenues
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember		 [1]  
Expenses 272,014us-gaap_CostsAndExpenses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember		 [2] 204,278us-gaap_CostsAndExpenses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember		 [2]  
Other Income 238,972us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember		 [3] 70,155us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember		 [3]  
Income Before Provision for Taxes (48,181)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember		 [4] (116,274)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember		 [4]  
Total Assets $ 12,767,889us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember		 [5] $ 13,570,204us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember		 [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: Three Months Ended March 31, 2015 2014 Fund Management Fees and Performance Fees Eliminated in Consolidation and Transactional Investment Loss $ 15,067 $ (17,878 ) Fund Expenses Added in Consolidation 15,748 (746 ) Non-Controlling Interests in Income of Consolidated Entities 209,580 89,753 Transaction-Related Other Loss (1,423 ) (974 ) Total Consolidation Adjustments and Reconciling Items $ 238,972 $ 70,155
[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: Three Months Ended March 31, 2015 2014 Economic Income $ 1,631,783 $ 825,246 Adjustments Amortization of Intangibles (25,899 ) (29,003 ) IPO and Acquisition-Related Charges (231,862 ) (177,024 ) Non-Controlling Interests in Income of Consolidated Entities 209,580 89,753 Total Consolidation Adjustments and Reconciling Items (48,181 ) (116,274 ) Income Before Provision for Taxes $ 1,583,602 $ 708,972
[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.