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Conditional commitment on investments.

No definition available.

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Deferred expense amortization period.

No definition available.

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Offering expenses.

No definition available.

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Unfunded nvestment commitments.

No definition available.

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Specific incremental costs directly attributable to a proposed or actual offering of securities which are deferred at the end of the reporting period.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 340
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 5.A)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480341/340-10-S99-1

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Costs incurred in connection with the offering and selling of additional partner interest.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 5.D.Q1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479886/946-10-S99-4

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 340
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 5.A)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480341/340-10-S99-1

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Amount of transactions with related party during the financial reporting period.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483326/850-10-50-1

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Balance Type:	debit
Period Type:	duration

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Name:	us-gaap_RelatedPartyTransactionAxis=bxinfra_OrganizationalExpensesMember
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Data Type:	na
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Name:	us-gaap_RelatedPartyTransactionAxis=bxinfra_OtherBlackstoneFundsMember
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Data Type:	na
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