Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Jan. 01, 2023
Schedule Of Commitments And Contingencies [Line Items]
General partner capital funding	$ 5,000.0
Consolidated entities net assets restricted as to payment of cash dividends and advances to partnership	106.0
Total investments at risk in respect of guarantees extended	$ 18.3
Contingent obligations currently anticipated to expire end	2032
Provision for cash clawback	$ 1,100.0
Contingent Obligations (Clawback)	6,000.0
Loss Contingency Accrual, Payments	$ 27.2
Blackstone Real Estate Investment Trust or BREIT [Member]
Schedule Of Commitments And Contingencies [Line Items]
Percentage Of Incremental Cash Payment In Excess Of Target Return	5.00%
Security Owned and Pledged as Collateral, Associated Liabilities, Fair Value	$ 48.6
Investments Pledged fair value	$ 1,000.0
Common stock, value, subscriptions		$ 4,000.0
Blackstone Real Estate Investment Trust or BREIT [Member] \| University of California [Member]
Schedule Of Commitments And Contingencies [Line Items]
Percentage of targeted annualized net return	11.25%
Cost of the investment	$ 4,000.0
Blackstone Holdings
Schedule Of Commitments And Contingencies [Line Items]
Loans held By employees for investment guaranteed	78.9
Contingent Obligations (Clawback)	5,700.0
Loss Contingency Accrual, Payments	12.5
Current And Former Blackstone Personnel
Schedule Of Commitments And Contingencies [Line Items]
Loss Contingency Accrual, Payments	14.7
Consolidated Blackstone Funds
Schedule Of Commitments And Contingencies [Line Items]
Funds signed investment commitments	210.0
Consolidated Blackstone Funds \| Portfolio Company Acquisition
Schedule Of Commitments And Contingencies [Line Items]
Signed investment commitments for portfolio company acquisitions in process of closing	$ 81.2

Consolidated entities' net assets restricted as to payment of cash dividends and advances to partnership.

No definition available.

Name:	bx_ConsolidatedEntitiesNetAssetsRestrictedAsToPaymentOfCashDividendsAndAdvancesToPartnership
Namespace Prefix:	bx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Contingent obligations currently anticipated to expire end

+ References

No definition available.

+ Details

Name:	bx_ContingentObligationsCurrentlyAnticipatedToExpireEnd
Namespace Prefix:	bx_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration

- Definition

Funds Signed Investment Commitments

+ References

No definition available.

+ Details

Name:	bx_FundsSignedInvestmentCommitments
Namespace Prefix:	bx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

General Partner Capital Funding Commitments

+ References

No definition available.

+ Details

Name:	bx_GeneralPartnerCapitalFundingCommitments
Namespace Prefix:	bx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Loans Held By Employees For Investment Guaranteed

+ References

No definition available.

+ Details

Name:	bx_LoansHeldByEmployeesForInvestmentGuaranteed
Namespace Prefix:	bx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage Of Incremental Cash Payment In Excess Of Target Return`.

+ References

No definition available.

+ Details

Name:	bx_PercentageOfIncrementalCashPaymentInExcessOfTargetReturn
Namespace Prefix:	bx_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of Targeted Annualized Net Return.

+ References

No definition available.

+ Details

Name:	bx_PercentageOfTargetedAnnualizedNetReturn
Namespace Prefix:	bx_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Provision for cash clawback

+ References

No definition available.

+ Details

Name:	bx_ProvisionForCashClawback
Namespace Prefix:	bx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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.

+ References

No definition available.

+ Details

Name:	bx_ScheduleOfCommitmentsAndContingenciesLineItems
Namespace Prefix:	bx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Signed Investment Commitments For Portfolio Company Acquisitions In Process Of Closing

+ References

No definition available.

+ Details

Name:	bx_SignedInvestmentCommitmentsForPortfolioCompanyAcquisitionsInProcessOfClosing
Namespace Prefix:	bx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Monetary value of common stock allocated to investors to buy shares of a new issue of common stock before they are offered to the public. When stock is sold on a subscription basis, the issuer does not initially receive the total proceeds. In general, the issuer does not issue the shares to the investor until it receives the entire proceeds.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=65888546&loc=d3e21300-112643

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_CommonStockSharesSubscriptions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

This item represents disclosure of all significant concentrations of credit risk or market risk arising from the subject financial instrument (as defined), whether from an individual counterparty or groups of counterparties.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13531-108611

+ Details

Name:	us-gaap_FairValueConcentrationOfRiskInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The fair value as of the balance sheet date of firm holdings in private equity, mezzanine, venture capital, merchant banking, real estate and special situations investments. Includes both pledged (to counterparties as collateral for financing transactions) and unpledged holdings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 320
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=35711157&loc=d3e42546-110969

+ Details

Name:	us-gaap_FinancialInstrumentsOwnedPrincipalInvestmentsAtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Cost of the investment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section 50
-Paragraph 6
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=99383244&loc=d3e12121-115841

+ Details

Name:	us-gaap_InvestmentOwnedAtCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of cash outflow reducing loss contingency liability.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

+ Details

Name:	us-gaap_LossContingencyAccrualPayments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=124440162&loc=d3e12021-110248

+ Details

Name:	us-gaap_LossContingencyEstimateOfPossibleLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value of liabilities arising from or related to a financial instrument held by the entity for its own account (proprietary securities) which has been pledged to counterparties.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 1B
-URI https://asc.fasb.org/extlink&oid=126970911&loc=SL6283291-111563

+ Details

Name:	us-gaap_SecurityOwnedAndPledgedAsCollateralAssociatedLiabilitiesFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=bx_BlackstoneRealEstateInvestmentTrustOrBreitMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=bx_UniversityOfCaliforniaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=bx_BlackstoneIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=bx_CurrentAndFormerBlackstonePersonnelMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_OptionIndexedToIssuersEquityTypeAxis=bx_ConsolidatedBlackstoneFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentTypeAxis=bx_PortfolioCompanyAcquisitionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: