Name:	bx_PercentageOfInvestmentsInCategoryRedemptionDiscretionOfInvesteeFundManagerElectingToSidePocketInvestments
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Percentage Of Investments Redeemable As Of Reporting Date

No definition available.

Name:	bx_PercentageOfInvestmentsRedeemableAsOfReportingDate
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Percentage of Investments Side Pocketed as of Reporting Date

No definition available.

Name:	bx_PercentageOfInvestmentsSidePocketedAsOfReportingDate
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Percentage Of Restricted Investments

No definition available.

Name:	bx_PercentageOfRestrictedInvestments
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The total percentage of all investments, comprising or included in the major category, of those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments) for which the entity has intentions to sell or liquidate, but the specific assets for sale or liquidation have not been identified (for example, the entity intends to sell 20 percent of its investments in private equity funds, but the individual investments to be sold have not been identified).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 6A

-Subparagraph (h)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=SL6742756-110258

Name:	us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerSharePlannedSaleInvestmentsNotIdentifiedPercentage
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Data Type:	num:percentItemType
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The percentage of the total value of investments that cannot be redeemed because of a redemption restriction as of the statement of financial position date.

No definition available.