Equity-Based Compensation - Summary of Status of Partnership's Unvested Equity-Based Awards (Detail)	3 Months Ended
Mar. 31, 2026 $ / shares shares
Blackstone \| Blackstone Partnership Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance \| shares	226,888
Granted (Units) \| shares	0
Vested (Units) \| shares	(226,888)
Forfeited (Units) \| shares	0
Ending Balance \| shares	0
Beginning Balance \| $ / shares	$ 32.02
Granted (Weighted-Average Grant Date Fair Value) \| $ / shares	0
Vested (Weighted-Average Grant Date Fair Value) \| $ / shares	32.02
Forfeited (Weighted-Average Grant Date Fair Value) \| $ / shares	0
Ending Balance \| $ / shares	$ 0
Blackstone Group Inc. \| Equity Settled Awards Deferred Restricted Shares Of Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance \| shares	29,420,712
Granted (Units) \| shares	2,151,158
Vested (Units) \| shares	(2,655,224)
Forfeited (Units) \| shares	(101,279)
Ending Balance \| shares	28,815,367
Beginning Balance \| $ / shares	$ 122.07
Granted (Weighted-Average Grant Date Fair Value) \| $ / shares	154.17
Vested (Weighted-Average Grant Date Fair Value) \| $ / shares	125.87
Forfeited (Weighted-Average Grant Date Fair Value) \| $ / shares	129.76
Ending Balance \| $ / shares	$ 124.19
Blackstone Group Inc. \| Cash Settled Awards Phantom Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance \| shares	66,941
Granted (Units) \| shares	1,768
Vested (Units) \| shares	(5,196)
Forfeited (Units) \| shares	(2,566)
Ending Balance \| shares	60,947
Beginning Balance \| $ / shares	$ 146.7
Granted (Weighted-Average Grant Date Fair Value) \| $ / shares	110.92
Vested (Weighted-Average Grant Date Fair Value) \| $ / shares	115.55
Forfeited (Weighted-Average Grant Date Fair Value) \| $ / shares	132.13
Ending Balance \| $ / shares	$ 110.44

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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- Definition

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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Equity-Based Compensation - Summary of Status of Partnership's Unvested Equity-Based Awards (Detail)	3 Months Ended
	Mar. 31, 2026 $ / shares shares
Blackstone \| Blackstone Partnership Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance \| shares	226,888
Granted (Units) \| shares	0
Vested (Units) \| shares	(226,888)
Forfeited (Units) \| shares	0
Ending Balance \| shares	0
Beginning Balance \| $ / shares	$ 32.02
Granted (Weighted-Average Grant Date Fair Value) \| $ / shares	0
Vested (Weighted-Average Grant Date Fair Value) \| $ / shares	32.02
Forfeited (Weighted-Average Grant Date Fair Value) \| $ / shares	0
Ending Balance \| $ / shares	$ 0
Blackstone Group Inc. \| Equity Settled Awards Deferred Restricted Shares Of Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance \| shares	29,420,712
Granted (Units) \| shares	2,151,158
Vested (Units) \| shares	(2,655,224)
Forfeited (Units) \| shares	(101,279)
Ending Balance \| shares	28,815,367
Beginning Balance \| $ / shares	$ 122.07
Granted (Weighted-Average Grant Date Fair Value) \| $ / shares	154.17
Vested (Weighted-Average Grant Date Fair Value) \| $ / shares	125.87
Forfeited (Weighted-Average Grant Date Fair Value) \| $ / shares	129.76
Ending Balance \| $ / shares	$ 124.19
Blackstone Group Inc. \| Cash Settled Awards Phantom Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance \| shares	66,941
Granted (Units) \| shares	1,768
Vested (Units) \| shares	(5,196)
Forfeited (Units) \| shares	(2,566)
Ending Balance \| shares	60,947
Beginning Balance \| $ / shares	$ 146.7
Granted (Weighted-Average Grant Date Fair Value) \| $ / shares	110.92
Vested (Weighted-Average Grant Date Fair Value) \| $ / shares	115.55
Forfeited (Weighted-Average Grant Date Fair Value) \| $ / shares	132.13
Ending Balance \| $ / shares	$ 110.44