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Related Party Transactions - Additional Information (Detail) (USD $)
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3 Months Ended | ||
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Mar. 31, 2015
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Mar. 31, 2014
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Dec. 31, 2014
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| Related Party Transaction [Line Items] | |||
| Founder's, other senior managing directors' and employees' investments | $ 1,000,000,000bx_InvestmentByFounderSeniorManagingDirectorsAndEmployees | $ 1,000,000,000bx_InvestmentByFounderSeniorManagingDirectorsAndEmployees | |
| Founder's, other senior managing directors' and employees' share of the Net Income Attributable to Redeemable Non-Controlling Interests | 53,100,000bx_FoundersOtherSeniorManagingDirectorsAndEmployeesShareOfNetIncomeAttributableToRedeemableNonControllingAndNonControllingInterestsInConsolidatedEntities | 44,900,000bx_FoundersOtherSeniorManagingDirectorsAndEmployeesShareOfNetIncomeAttributableToRedeemableNonControllingAndNonControllingInterestsInConsolidatedEntities | |
| Management and Advisory Fees, Net from Affiliates | 47,763,000us-gaap_RevenueFromRelatedParties | 74,032,000us-gaap_RevenueFromRelatedParties | |
| Interest from loans to affiliates | 2,000,000bx_InterestFromLoansToAffiliates | 100,000bx_InterestFromLoansToAffiliates | |
| Partnership Unit to Blackstone Common Unit ratio | 100.00%bx_LimitedPartnershipToCommonStockConversionRatio | ||
| Cash saving in tax receivable agreements, percentage | 85.00%bx_CashSavingInTaxReceivableAgreements | ||
| Expected future payments under the tax receivable agreements | 1,200,000,000bx_ExpectedFuturePaymentsUnderTaxReceivableAgreements | ||
| Expected future payments under the tax receivable agreements in years | 15 years | ||
| After-tax net present value estimated payments | $ 370,400,000bx_AfterTaxNetPresentValueEstimatedPaymentsForTaxReceivableAgreements | ||
| After-tax net present value discount rate assumption | 15.00%bx_AfterTaxNetPresentValueDiscountRateAssumptionForTaxReceivableAgreements | ||
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- Definition
After Tax Net Present Value Discount Rate Assumption For The Tax Receivable Agreements No definition available.
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- Definition
After Tax Net Present Value Estimated Payments For The Tax Receivable Agreements No definition available.
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- Definition
Cash Saving in tax receivable agreements No definition available.
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- Definition
Expected future payments under the tax receivable agreements No definition available.
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- Definition
Expected future payments under the tax receivable agreements in years No definition available.
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- Definition
Founders Other Senior Managing Directors And Employees Share Of Net Income Attributable To Redeemable Non Controlling And Non Controlling Interests In Consolidated Entities. No definition available.
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- Definition
Interest From Loans to Affiliates No definition available.
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- Definition
Investment By Founder Senior Managing Directors And Employees No definition available.
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- Definition
Limited Partnership To Common Stock Conversion Ratio No definition available.
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- Details
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- Definition
Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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