Limited Partners' Capital Account, Cash Retained, Units Issued

No definition available.

Name:	bxinfra_LimitedPartnersCapitalAccountCashRetainedUnitsIssued
Namespace Prefix:	bxinfra_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Classes Of Limited Partnership Units

+ References

No definition available.

+ Details

Name:	bxinfra_NumberOfClassesOfLimitedPartnershipUnits
Namespace Prefix:	bxinfra_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage Of Early Deduction Units Repurchased.

+ References

No definition available.

+ Details

Name:	bxinfra_PercentageOfEarlyDeductionUnitsRepurchased
Namespace Prefix:	bxinfra_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage Of Repurchase Of Units Outstanding.

+ References

No definition available.

+ Details

Name:	bxinfra_PercentageOfRepurchaseOfUnitsOutstanding
Namespace Prefix:	bxinfra_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Redemption Offering Program, Outstanding Redemption Requests Subject To Early Redemption Reduction, Period

+ References

No definition available.

+ Details

Name:	bxinfra_RedemptionOfferingProgramOutstandingRedemptionRequestsSubjectToEarlyRedemptionReductionPeriod
Namespace Prefix:	bxinfra_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Repurchase of units net of early repurchase deduction.

+ References

No definition available.

+ Details

Name:	bxinfra_RepurchaseOfUnitsNetOfEarlyRepurchaseDeduction
Namespace Prefix:	bxinfra_
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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477796/946-210-45-3

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478448/946-505-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 205
-Name Accounting Standards Codification
-Section 45
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478009/946-205-45-4

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478448/946-505-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478448/946-505-50-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478448/946-505-50-2

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478448/946-505-50-1

+ Details

Name:	us-gaap_InvestmentCompanyChangesInNetAssetsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Net asset value per share or per unit of investments in certain entities that calculate net asset value per share. Includes, but is not limited to, by unit, membership interest, or other ownership interest. Investment includes, but is not limited to, investment in certain hedge funds, venture capital funds, private equity funds, real estate partnerships or funds. Excludes fair value disclosure.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 946
-SubTopic 830
-Name Accounting Standards Codification
-Section 55
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479168/946-830-55-12

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section 45
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477796/946-210-45-4

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478494/946-205-50-7

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478494/946-205-50-7

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478448/946-505-50-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-04(19))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479170/946-210-S99-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.6-05(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479170/946-210-S99-2

+ Details

Name:	us-gaap_NetAssetValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Total change in each class of partners' capital accounts during the year due to redemptions and adjustments to redemption value. All partners include general, limited and preferred partners.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 5
-Subparagraph (SAB Topic 4.F)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-5

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480100/505-10-S45-8

+ Details

Name:	us-gaap_PartnersCapitalAccountRedemptions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The number of units redeemed during the year of each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners.

+ References

+ Details

Name:	us-gaap_PartnersCapitalAccountUnitsRedeemed
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow from the issuance of common limited partners units during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 14
-Subparagraph (a)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-14

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfCommonLimitedPartnersUnits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of stock bought back by the entity at the exercise price or redemption price.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480100/505-10-S45-3

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480100/505-10-S45-2

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_StockRedeemedOrCalledDuringPeriodShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Details

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

- Details

Name:	us-gaap_StatementClassOfStockAxis=bxinfra_ClassISeriesIUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=bxinfra_ClassSUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=bxinfra_ClassDUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=bxinfra_BlackstoneInfrastructureStrategiesTEL.P.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=bxinfra_ClassITEUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=bxinfra_ClassSTEUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=bxinfra_BXINFRAAggregatorCYML.P.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Net Assets - Additional Information (Details) $ / shares in Units, $ in Thousands				3 Months Ended		9 Months Ended
	Mar. 30, 2026 limited_partnership_unit	Mar. 06, 2026 limited_partnership_unit	Mar. 05, 2026 limited_partnership_unit	Sep. 30, 2026 USD ($) $ / shares shares	Sep. 30, 2025 USD ($) shares	Sep. 30, 2026 USD ($) $ / shares shares	Sep. 30, 2025 USD ($) shares
Investment Company, Change in Net Assets [Line Items]
Classes of limited partnership units \| limited_partnership_unit	5	2	3
Net asset value per share (in dollars per share) \| $ / shares				$ 25.00		$ 25.00
Percentage of repurchase of units outstanding				3.00%		3.00%
Period of units outstanding						2 years
Percentage of early deduction units repurchased				5.00%		5.00%
Partners capital account units redeemed (in shares) \| shares				179,345	0	593,922	8,122
Proceeds from Issuance of Units \| $						$ 2,176,860	$ 2,617,692
Units issued (in shares) \| shares				967,119	459,487	2,618,328	648,639
Redemption of units (in shares) \| shares				179,345		593,922	8,122
Value of units redeemed \| $				$ 5,322		$ 16,522	$ 198
Feeder
Investment Company, Change in Net Assets [Line Items]
Partners capital account units redeemed (in shares) \| shares							200,000
Partners' capital account, redemptions \| $				5,300		16,500
Series I Units
Investment Company, Change in Net Assets [Line Items]
Proceeds from Issuance of Units \| $				$ 8,800	$ 3,200	$ 21,900	$ 4,400
Redemption of units (in shares) \| shares				69,655		313,819	5,154
Class S Units
Investment Company, Change in Net Assets [Line Items]
Proceeds from Issuance of Units \| $				$ 9,800	4,800	$ 26,500	$ 6,600
Redemption of units (in shares) \| shares				109,690		180,387	2,968
Class D Units
Investment Company, Change in Net Assets [Line Items]
Proceeds from Issuance of Units \| $				$ 1,300	$ 400	$ 3,300	$ 600
Redemption of units (in shares) \| shares				0		99,716	0
Blackstone Infrastructure Strategies (TE) L.P.
Investment Company, Change in Net Assets [Line Items]
Classes of limited partnership units \| limited_partnership_unit		2	6
Net asset value per share (in dollars per share) \| $ / shares				$ 25.00		$ 25.00
Percentage of repurchase of units outstanding				3.00%		3.00%
Period of units outstanding						2 years
Percentage of early deduction units repurchased				5.00%		5.00%
Partners capital account units redeemed (in shares) \| shares				25,700	0	78,705	5,154
Partners' capital account, redemptions \| $				$ 800		$ 2,300	$ 100
Proceeds from Issuance of Units \| $						$ 586,316	$ 702,146
Units issued (in shares) \| shares				302,125	132,675	822,852	178,107
Redemption of units (in shares) \| shares				25,700		78,705	5,154
Value of units redeemed \| $				$ 783		$ 2,263	$ 129
Blackstone Infrastructure Strategies (TE) L.P. \| Class I-TE Units
Investment Company, Change in Net Assets [Line Items]
Proceeds from Issuance of Units \| $				4,100	$ 1,500	10,800	2,000
Blackstone Infrastructure Strategies (TE) L.P. \| Class S-TE Units
Investment Company, Change in Net Assets [Line Items]
Proceeds from Issuance of Units \| $				$ 3,600	$ 1,800	$ 9,700	$ 2,400
Redemption of units (in shares) \| shares				25,700		47,431	0
BXINFRA Aggregator (CYM) L.P.
Investment Company, Change in Net Assets [Line Items]
Net asset value per share (in dollars per share) \| $ / shares				$ 25.00		$ 25.00
Proceeds from Issuance of Units \| $						$ 2,269,725	$ 2,846,638
Redemption of units (in shares) \| shares				239,246	17,483	833,076	25,626
Value of units redeemed \| $				$ 7,768	$ 464	$ 24,856	$ 673
BXINFRA Aggregator (CYM) L.P. \| Series I Units
Investment Company, Change in Net Assets [Line Items]
Redemption of units (in shares) \| shares				239,246	17,483	833,076	25,626