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Reconciliation of Realized and Net Change in Unrealized Gains (Losses) to Other Income (Loss) - Net Gains (Losses) from Fund Investment Activities in Consolidated Statements of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Gain (Loss) on Securities [Line Items]
Realized and Net Change in Unrealized Gains from Consolidated Blackstone Funds	$ 597,947	$ 1,176,392	$ 1,746,626	$ 2,228,040
Interest and Dividend Revenue Attributable to Consolidated Blackstone Funds	43,686	40,073	87,770	75,458
Other Income - Net Gains from Fund Investment Activities	61,131	73,519	191,456	184,118
Consolidated Blackstone Funds
Gain (Loss) on Securities [Line Items]
Realized Gains	5,198	52,236	2,286	34,378
Net Change in Unrealized Gains (Losses)	6,257	(22,278)	112,260	74,963
Realized and Net Change in Unrealized Gains from Consolidated Blackstone Funds	11,455	29,958	114,546	109,341
Interest and Dividend Revenue Attributable to Consolidated Blackstone Funds	49,676	43,561	76,910	74,777
Other Income - Net Gains from Fund Investment Activities	$ 61,131	$ 73,519	$ 191,456	$ 184,118

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- Definition

Investment Income (Loss) Realized represents the gains and losses on the Partnership's principal investments, including its investments in Funds that are not consolidated, its equity method investments, and other principal investments. Investment Income (Loss) is realized when the Partnership redeems all or a portion of its investment or when the Partnership receives cash income, such as dividends or distributions, from its non-consolidated funds.

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Investment Income (Loss) Unrealized represents the unrealized gains and losses on the Partnership's principal investments, including its investments in Funds that are not consolidated, its equity method investments, and other principal investments. Unrealized Investment Income (Loss) results from changes in the fair value of the underlying investment as well as the reversal of unrealized gain (loss) at the time an investment is realized.

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Amount of realized and unrealized gain (loss) on investment.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27405-111563

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.7(c),9(a))
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

Reference 3: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
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Amount before accretion (amortization) of purchase discount (premium) of interest income and dividend income on nonoperating securities.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
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Amount of gain (loss) related to nonoperating activities, classified as other.

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-Topic 220
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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