Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Digital Digital [Member] Digital [Member] Maximum Maximum [Member] Statistical Measurement [Domain] Statistical Measurement [Domain] Title of 12(b) Security Title of 12(b) Security Subsequent Event Subsequent Event [Member] Document Fiscal Year Focus Document Fiscal Year Focus Class D Units Class D Units Class D Units [Member] Class S units. Exit Capitalization Measurement Input Exit Capitalization [Member] Measurement Input Exit Capitalization [Member] Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Adjustment to Compensation, Amount Adjustment to Compensation Amount Pledged Status [Axis] Pledged Status [Axis] Class S Limited Partnership Units Class S Limited Partnership Units [Member] Class S limited partnership units. Financial Instrument [Axis] Financial Instrument [Axis] Net Change in Unrealized Gain (Loss) on Translation of Assets and Liabilities in Foreign Currencies Realized Gain (Loss), Foreign Currency Transaction, Excluding Investment Price Change, before Tax Distributions Payment for Distribution on Mandatorily Redeemable Financial Instrument, Liability Classified Payable for Investments Purchased Payable, Investment, Purchase Percentage of high water mark catch up Percentage Of High water mark catch Up Percentage of high water mark catch up. Organizational and Offering Expenses Organizational and Offering Expenses Policies [Policy Text Block] Organizational and offering expenses policies. Money Market Fund, Fair Value Money Market Funds, Fair Value Disclosure Money Market Funds, Fair Value Disclosure Total Expenses Investment Company Expense Ratio Investment company expense ratio. Line of Credit Line of Credit [Member] Early Redemption Deduction Payable to BXINFRA U.S. Early Redemption Deduction Receivable from the Feeder Non Cash Or Part Non Cash Early Redemption Deduction Receivable From The Feeder Non Cash Or Part Non Cash Early Redemption Deduction Receivable From The Feeder Entity Ex Transition Period Entity Ex Transition Period Restatement Determination Date Restatement Determination Date Management fee waived Investment Company, Management Fee Waived Minimum utilization percentage two Line Of Credit Facility, Minimum Utilization, Percentage, Range Two Line Of Credit Facility, Minimum Utilization, Percentage, Range Two Investments in Affiliated Investee Funds Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Investment Investment [Member] Investment Default rate increase percentage Debt Instrument Default Rate Increase Percentage Debt Instrument Default Rate Increase Percentage Derivative Instrument [Axis] Derivative Instrument [Axis] Aggregate investment credit amount extended Aggregate Investment Credit Amount Extended Aggregate Investment Credit Amount Extended Debt Investments - Infrastructure Infrastructure Debt Investment [Member] Infrastructure debt investment. Amendment Flag Amendment Flag Gross and Net Amount of Recognized Liabilities for Repurchase Agreements Gross And Net Amount Of Recognized Liabilities For Repurchase Agreements Gross and net amount of recognized liabilities for repurchase agreements. Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Redemption of Units Redemption of Units, Net of Early Redemption Deduction Value of units redeemed Repurchase Of Units Net Of Early Repurchase Deduction Repurchase of units net of early repurchase deduction. Accrued Performance Participation Allocation IncreaseDecreaseInAccruedPerformanceParticipationAllocation Increase decrease in accrued performance participation allocation Percentage of administration fee payable Percentage of Administration fee payable Percentage of administration fee payable. Investments [Domain] Investments [Domain] Affiliated Investee Funds Affiliated Investee [Member] Affiliated Investee [Member] Management Fee Payable Increase (Decrease) in Management Fee Payable Related Party Transactions Related Party Transactions Disclosure [Text Block] Offering Costs Payable Increase (Decrease) In Offering Costs Payable Increase decrease in offering costs payable. Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Transfers Into Level III Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 BXPE US Aggregator (CYM) L.P BXPE US Aggregator CYM LP [Member] BXPE US Aggregator CYM LP [Member] Entity Address, State or Province Entity Address, State or Province PEO Total Compensation Amount PEO Total Compensation Amount Issuance of Class I-Series I Units for Director Fees Units Issued For Fees Units Issued For Fees Assets Assets, Fair Value Disclosure [Abstract] Cash and Cash Equivalents Cash and Cash Equivalents [Abstract] Redemption of Units Redemption of Units, Net of Early Redemption Deduction Payments For Repurchase Of Units Net Of Early Repurchase Deduction Payments For Repurchase Of Units Net Of Early Repurchase Deduction Units issued (in shares) Limited Partners' Capital Account, Cash Retained, Units Issued Limited Partners' Capital Account, Cash Retained, Units Issued Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Cash paid for performance participation allocation Payment For Performance Participation Allocation Payment For Performance Participation Allocation Number of reportable segments Number of Reportable Segments Schedule of Investments [Abstract] Digital Infrastructure Digital Infrastructure [Member] Digital Infrastructure Administration Fees Payable Administration Fees Payable Administration fees payable. Schedule of the Aggregate Notional Amount and Fair Value of the Derivative Instruments Schedule of Derivative Instruments [Table Text Block] EMEA EMEA [Member] Entity Address, City or Town Entity Address, City or Town Derivative, Fair Value Derivative, Fair Value, Net Investment on remaining value Investment on Remaining Value Investment on remaining value. Number of new investments Investment Company, Number Of New Investments Investment Company, Number Of New Investments Equity Investments Equity Method Investments, Fair Value Disclosure Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Taxes Payable Taxes Payable Organization Costs Payable IncreaseDecreaseInOrganizationCostsPayable Increase decrease in organization costs payable Statement of Financial Position [Abstract] Document Information [Line Items] Document Information [Line Items] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Class of Stock [Axis] Class of Stock [Axis] Water & Waste Infrastructure Water & Waste Infrastructure [Member] Water & Waste Infrastructure Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Partners' capital account, redemptions Partners' Capital Account, Redemptions Commitments And Contingencies Disclosure [Table] Commitments And Contingencies Disclosure [Table] Commitments And Contingencies Disclosure [Table] Capital Unit, Class [Domain] Capital Unit, Class [Domain] Level II Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Net Investment Income (Loss) (in dollars per share) Investment Company, Investment Income (Loss), Per Share, Basic Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Collaborative Arrangement and Arrangement Other than Collaborative [Table] Collaborative Arrangement and Arrangement Other than Collaborative [Table] Organizational Expenses Organizational Expenses [Member] Organizational Expenses. Open Futures Contract, Identifier [Axis] Open Futures Contract, Identifier [Axis] Redemptions Payable Redemptions Payable Redemptions payable. Other Other Other Expenses Distribution Type [Axis] Distribution Type [Axis] Dividend Income Dividend Income Dividend Income, Operating Transportation Infrastructure Transportation [Member] Transportation [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Investment in the Aggregator [Line Items] Investment in the Aggregator [Line Items] Investment in the aggregator. Debt Investment - Liquid Debt Investment - Liquid [Member] Debt Investment - Liquid Schedule of Long-Term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Total Expenses Investment Income, Investment Expense Recent Accounting Developments New Accounting Pronouncements, Policy [Policy Text Block] Repayment option, expiration of credit line of lender demands Line Of Credit Facility, Repayment Option One [Member] Line Of Credit Facility, Repayment Option One Use of Estimates Use of Estimates, Policy [Policy Text Block] Warehousing Agreement Warehousing Agreement [Text Block] Warehousing agreement. Related and Nonrelated Parties [Axis] Related and Nonrelated Parties [Axis] Repayment of Borrowings Repayments of Lines of Credit Due from Affiliates Due from Affiliates Increase (Decrease) Due from Affiliates Distributions reinvested (in shares) Stock Issued During Period, Shares, Dividend Reinvestment Plan Agreement [Domain] Agreement [Domain] Agreement 30 - 90 Days Maturity 30 to 90 Days [Member] Taxes Payable Increase (Decrease) in Income Taxes Payable Supplemental Disclosure of Non-Cash Financing Activities Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Reinvested Dividends in Affiliated Investee Funds Payment For Reinvested Dividends In Affiliated Funds Payment For Reinvested Dividends In Affiliated Funds Document Period End Date Document Period End Date Cash Flows Due to Changes in Operating Assets and Liabilities Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] General Partner Interest General Partners' Capital Account Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Money Market Fund, Fair Value as a Percentage of Net Assets Money Market Funds, Percent Of Net Assets Money Market Funds, Percent Of Net Assets Class D-TE Units Class D-TE Units [Member] Class D-TE Units Investments, All Other Investments [Abstract] Beginning balance Ending balance Net Assets Interest rate percentage Debt Instrument, Interest Rate, Effective Percentage Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Number of investments acquired Number Of Investments Acquired Number Of Investments Acquired Entity Shell Company Entity Shell Company Class I Limited Partnership Units Class I Limited Partnership Units [Member] Class I limited partnership units. Directors’ Fees Director Fee Percentage of management fee payable Percentage Of Management Fee Payable Percentage of management fee payable. Segment Reporting Segment Reporting, Policy [Policy Text Block] Uncertain Tax Positions Income Tax Uncertainties, Policy [Policy Text Block] Total Derivatives Total Derivatives [Member] Total Derivatives Schedule of Investments Investment Holdings, Schedule of Investments [Table Text Block] Name Outstanding Recovery, Individual Name Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Investment company cash received Investment Company Cash Received During the Commitment Investment Company Cash Received During the Commitment Net Increase in Net Assets Resulting from Investment Operations (in dollars per share) Investment Operations Investment operations. Distribution Payable Other Significant Noncash Transaction, Distributions Payable Other Significant Noncash Transaction, Distributions Payable Total Liabilities Liabilities Trading Symbol Trading Symbol Partner Type [Axis] Partner Type [Axis] Measurement Input, Discount Rate Measurement Input, Discount Rate [Member] Geographical [Domain] Geographical [Domain] Minimum utilization percentage one Line Of Credit Facility, Minimum Utilization, Percentage, Range One Line Of Credit Facility, Minimum Utilization, Percentage, Range One Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Deferred Financing Cost Amortization Deferred Financing Cost Amortization Deferred financing cost amortization. Company Selected Measure Name Company Selected Measure Name Measurement [Axis] Measurement [Axis] Measurement [Axis] Limited Partners' Capital Account [Roll Forward] Limited Partners' Capital Account [Roll Forward] Limited Partners' Capital Account Schedule of Investments [Table] Schedule of Investments [Table] Income Tax Disclosure [Abstract] Derivative Liability, Fair Value as a Percentage of Net Assets Derivative Liability, Net Asset, Percentage Derivative Liability, Net Asset, Percentage Schedule of Recognized Liabilities for Repurchase Agreements Schedule Of Recognized Liabilities For Repurchase Agreements [Table Text Block] Schedule of recognized liabilities for repurchase agreements. Warehousing Agreement [Table] Warehousing Agreement [Table] Warehousing agreement. Total Investments, Investments in Affiliated Investee Funds, Cash and Cash Equivalents and Derivative Instruments Total Investments, Investments in Affiliated Investee Funds, Cash and Cash Equivalents and Derivative Instruments [Member] Total Investments, Investments in Affiliated Investee Funds, Cash and Cash Equivalents and Derivative Instruments Net Change in Unrealized Gain (Loss) on Derivative Instruments Unrealized Gain (Loss) on Derivatives Ratios to Weighted-Average Net Assets (Non-Annualized) Investment Company, Financial Ratios [Abstract] Yield Analysis Valuation Technique, Yield Analysis [Member] Valuation Technique, Yield Analysis Accounting Policies [Table] Accounting Policies [Table] Accounting Policies [Table] Percentage of holding investment of the aggregator Percentage of Holding Investment of Aggregator Percentage of holding investment of the aggregator. Related Party Transactions [Abstract] Operating Activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Transfers Out of Level III Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Line of Credit Facility [Table] Line of Credit Facility [Table] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Proceeds from Borrowings Proceeds from Lines of Credit Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Money Market Fund, cost Cash Equivalent, Money Market Fund, Carrying Value Derivative Liabilities, Fair Value Derivative Liability, Subject to Master Netting Arrangement, before Offset Financial Support to Nonconsolidated Legal Entity [Axis] Financial Support to Nonconsolidated Legal Entity [Axis] Organization Costs Payable Organization Costs Payable Organization costs payable. Investment Company, Financial Highlights [Abstract] Schedule of Fair Value of Investments for Level III Inputs Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Deferred Taxes Deferred Charges, Policy [Policy Text Block] Due from Affiliates Other Receivables Dividend Receivable Dividend Receivable Dividends Receivable Distributions Paid in Cash Distributions Paid in Cash Distribution Made to Limited Partner, Cash Distributions Paid Investment Company, Financial Highlights [Roll Forward] Investment Company, Financial Highlights [Roll Forward] Exit Multiple Measurement Input Exit Multiple [Member] Measurement Input Exit Multiple [Member] Award Timing Predetermined Award Timing Predetermined [Flag] Warehousing Agreement [Line Items] Warehousing Agreement [Line Items] Warehousing agreement Derivative, Fair Value as a Percentage of Net Assets Derivative, Fair Value, Net Asset, Percentage Derivative, Fair Value, Net Asset, Percentage Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Level I Fair Value, Inputs, Level 1 [Member] Redemption of units (in shares) Redemption of units (in shares) Stock Redeemed or Called During Period, Shares Investment Company, Net Assets [Roll Forward] Investment Company, Net Assets [Roll Forward] Disclosure of Repurchase Agreements [Line Items] Disclosure of Repurchase Agreements [Line Items] Disclosure of repurchase agreements. Performance Participation Allocation Received Performance Participation Allocation Received [Member] Performance Participation Allocation Received Fair Value of Investments and Financial Instruments And Valuation of Investments at Fair Value Fair Value of Financial Instruments, Policy [Policy Text Block] Payments for Servicing Fees Payments for Servicing Fees Payment for servicing fees Payment for Servicing Fees Payment for servicing fees. Investment Company, Financial Highlights [Line Items] Investment Company, Financial Highlights [Line Items] Net Investment Income (Loss) Investment Company, Investment Income (Loss) Ratio Investment, Affiliated Issuer Investment, Affiliated Issuer [Member] Summary of Investment Holdings [Line Items] Summary of Investment Holdings [Line Items] Investments at Fair Value and Investments in Affiliated or Unaffiliated Investee Funds Investments at Fair Value and Investments in Affiliated or Unaffiliated Investee Funds [Policy Text Block] Fair value of financial instruments in affiliated or unaffiliated investee funds. All Executive Categories All Executive Categories [Member] Debt Investments - Liquid Debt Investments - Liquid [Member] Debt Investments - Liquid Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Repayment of Line of Credit Repayments of Long-Term Lines of Credit Net Expenses Investment Company, Expense, after Reduction of Fee Waiver and Reimbursement Performance Participation Allocation, Administration Fee and Management Fee Payables Performance Participation Allocation Administration Fee and Management Fee Payables [Policy Text Block] Disclosure of accounting policy for the recognition of fees for investment advise, research, administrative and investment account management services provided to customers by broker dealers. This fee is generally based on the net assets of the fund or the account. Class I-TE Units Class I-TE Units [Member] Class I-TE Units Assets sold under agreements to repurchase, carrying amount Assets Sold under Agreements to Repurchase, Carrying Amount Partner Type of Partners' Capital Account, Name [Domain] Partner Type of Partners' Capital Account, Name [Domain] Distribution Made to Limited Partner [Line Items] Distribution Made to Limited Partner [Line Items] Class I- TE-ACC Units Class I-TE-ACC Units [Member] Class I-TE-ACC Units Warehousing Fees Waivers Investment Company, Expense Ratio, after Voluntary Fee Waiver Deduction Fair Value Disclosures [Abstract] Debt Disclosure [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Minimum Minimum [Member] Borrowings Outstanding amount Long-Term Line of Credit Investment Type [Axis] Investment Type [Axis] Investment amount sold to by agreement Investment Amount Sold To By Agreement Investment amount sold to by agreement. Expiration Date Trading Arrangement Expiration Date Total Investments Investments, Fair Value Disclosure Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] WACC Measurement Input WACC [Member] Measurement Input WACC [Member] Schedule of Aggregator's Repurchase Agreement Obligations Schedule of Underlying Assets of Repurchase Agreements when Amount of Repurchase Agreements Exceeds 10 Percent of Assets [Table Text Block] Average utilization fee Line Of Credit Facility, Average Utilization Fee, Percentage Line Of Credit Facility, Average Utilization Fee, Percentage Class S-TE Units Class S-TE Units [Member] Class S-TE Units Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Total Cash and Cash Equivalents Cash and Cash Equivalents, Fair Value Disclosure Americas Americas [Member] Units outstanding (in shares) Units outstanding (in shares) Beginning units outstanding (in shares) Ending units outstanding (in shares) Limited Partners' Capital Account, Units Outstanding Total derivatives, cost Derivative, Fair Value, Cost Derivative, Fair Value, Cost Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Net Change in Unrealized Gain (Loss) Derivative Unrealized Gain Loss [Member] Derivative Unrealized Gain Loss [Member] Extension option period Debt Instrument, Extension Period Debt Instrument, Extension Period Warehousing Agreement [Abstract] Warehousing agreement. Class S- TE-ACC Units Class S-TE-ACC Units [Member] Class S-TE-ACC Units Organizational Expenses Organizational Expenses Organizational expenses. Due to Affiliates Other Liabilities Written notice period Performance Participation Allocation, Written Notice Period Performance Participation Allocation, Written Notice Period General Partner Interest General Partner Interest [Member] General partner interest. Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Derivative [Table] Derivative [Table] Net Assets [Line Items] Net Assets [Line Items] Net Assets [Line Items] Distribution Reinvested Distributions Reinvested Distributions reinvested. Net Investment Income (Loss) Investment Income, Operating, after Expense and Tax Schedule of Aggregate Distributions Declared and Payable Distributions Made to Limited Partner, by Distribution [Table Text Block] Organizational Cost Payable Organizational Cost Payable [Member] Organizational Cost Payable Series II-TE Units Class I-TE Series II Units [Member] Class I-TE Series II Units Payments for Redemptions Payments For Redemptions Payments for redemptions. Number of investments Investment Company, Number of Investment Investment Company, Number of Investment Exercise Price Award Exercise Price Percentage of repurchase of units outstanding Percentage Of Repurchase Of Units Outstanding Percentage Of Repurchase Of Units Outstanding. Related Party Transaction [Axis] Related Party Transaction [Axis] Jutland Credit Facility Jutland Credit Facility [Member] Jutland Credit Facility Finco Finco [Member] Finco. Document Quarterly Report Document Quarterly Report Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Interest Rate Swap Interest Rate Swap [Member] Lender Name [Axis] Lender Name [Axis] Effects of Exchange Rate Changes on Cash and Cash Equivalents Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Measurement inputs Investment Company, Investment Owned, Measurement Input Line of Credit Agreement Borrowings Debt Disclosure [Text Block] Investment owned, cost Investment Owned, Cost Management Fees Management Fee Expense Open Forward Foreign Currency Contract, Identifier [Axis] Open Forward Foreign Currency Contract, Identifier [Axis] Performance Participation Allocation Performance Participation Allocation [Member] Performance participation allocation. Servicing Fees Payable Servicing Fees Payable Servicing fees payable. Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Financial Highlights Investment Company, Financial Highlights [Text Block] Net Change in Unrealized Gain (Loss) on Investment in the Aggregator Net Change in Unrealized Gain (Loss) on Investment in the Aggregator Unrealized Gain (Loss), Investment, Derivative, and Foreign Currency Transaction, Operating, after Tax PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Change in Gain (Loss) Included in Net Assets Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Measurement Input Type [Domain] Measurement Input Type [Domain] Investments in affiliated investee funds Investments In Affiliated Investee Funds Investments In Affiliated Investee Funds. Line Of Credit Facility, Repayment Option [Axis] Line Of Credit Facility, Repayment Option [Axis] Line Of Credit Facility, Repayment Option Purchases of Investments Payment for Purchase, Investment, Operating Activity Foreign Currency Contracts Foreign Exchange Contract [Member] Deferred Assets Deferred Costs Income Investment Income, Net [Abstract] Adoption Date Trading Arrangement Adoption Date Taxes Payable Increase (Decrease) in Accrued Taxes Payable Assets Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Professional Fees Professional Fees Insider Trading Policies and Procedures [Line Items] Investment, Issuer Affiliation [Domain] Investment, Issuer Affiliation [Domain] Percentage of performance participation allocation of partners to total return Percentage Of Performance Participation Allocation Of Partners To total Return Percentage of performance participation allocation of partners to total return. Interest Income Interest Income, Operating Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Cash Held at Banks Cash Held At Banks [Member] Cash Held At Banks Feeder Feeder [Member] Feeder. Percentage of early deduction units repurchased Percentage Of Early Deduction Units Repurchased Percentage Of Early Deduction Units Repurchased. Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Management Fees Waived Investment Company, Contractual Fee Waived Unused Amount Term [Domain] Unused Amount Term [Domain] Unused amount term. Derivative Type [Axis] Derivative Type [Axis] Derivative Type [Axis] Interest rate until payment for acquisition of investment Interest Rate Until Payment For Acquisition of Investment Interest Rate Until Payment For Acquisition of Investment Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract] Equity Investments Equity Investments [Member] Equity Investments [Member] Number of operating segments Number of Operating Segments Date on which investment manager no longer acts as investment manager Line Of Credit Facility, Repayment Option Two [Member] Line Of Credit Facility, Repayment Option Two Distributions Distributions Distributions of units. Entity Central Index Key Entity Central Index Key Weighted-Average Weighted Average [Member] Investment Company, Change in Net Assets [Table] Investment Company, Change in Net Assets [Table] Offering Costs Payable Offering Costs Payable Offering costs payable. All Adjustments to Compensation All Adjustments to Compensation [Member] Aggregator Credit Agreement Aggregator Credit Agreement [Member] Aggregator Credit Agreement Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Income Taxes Income Tax, Policy [Policy Text Block] Net Cash Provided by (Used in) Operating Activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Income Statement [Abstract] Document Transition Report Document Transition Report Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Schedule of Investments [Line Items] Schedule of Investments [Line Items] Investment Company, Commitment, Scenario [Axis] Investment Company, Commitment, Scenario [Axis] Investment Company, Commitment, Scenario Investment, Name [Axis] Investment, Name [Axis] Net Change in Unrealized Gain (Loss) on Investment in BXINFRA U.S. (in dollars per share) Investment Company, Gain (Loss) on Investment, Per Share Proceeds from Units Issued (in dollars per share) Investment Company, Share Issuance, Per Share Deferred Tax Assets Deferred Income Tax Assets, Net Expenses Operating Expenses [Abstract] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Investment company, voluntary fee waived Investment Company, Voluntary Fee Waived Performance participation allocation Performance Participation Allocation Accrued Performance participation allocation. Variable rate Variable rate Debt Instrument, Basis Spread on Variable Rate Name Of Investment Group [Domain] Name Of Investment Group [Domain] Name Of investment group. Unit Distribution Unit Distribution [Member] City Area Code City Area Code Variable Rate [Domain] Variable Rate [Domain] Income Tax Examination [Line Items] Income Tax Examination [Line Items] Conversion of Units Between Classes or Series Stock Issued During Period, Value, Conversion of Units Schedule of Investments Fair Value of an Investment using NAV Disclosure In Tabular Form Of Fair Value Of Investments In Affiliates And Unfunded Commitment [Table Text Block] Disclosure in tabular form of fair value of investments in affiliates and unfunded commitment. Document Information [Table] Document Information [Table] All Individuals All Individuals [Member] Subsequent Events Subsequent Events [Text Block] Commitments And Contingencies Disclosure [Line Items] Commitments And Contingencies Disclosure [Line Items] Commitments And Contingencies Disclosure [Line Items] Agreement [Axis] Agreement [Axis] Agreement. Name Forgone Recovery, Individual Name Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Debt Investments - Infrastructure Debt Investments - Infrastructure [Member] Debt Investments - Infrastructure Energy Energy [Member] Energy [Member] Statement [Line Items] Statement [Line Items] Total Assets Assets Specified expenses as a percentage of net asset value maximum Specified Expenses As A Percentage Of Net Asset Value Maximum Specified expenses as a percentage of net asset value maximum. Entity [Domain] Entity [Domain] Interest Expense Interest Expense, Operating Net Investment Income (Loss) Net Investment Income (Loss) Net Investment Income (Loss) Net Investment Income (Loss) Investment Income, Net Industry Sector [Axis] Industry Sector [Axis] Expense Support and Management Fees Waivers Investment Company, Expense Ratio, Expenses and Management Fees Waivers Investment company, expense ratio, expenses and management fees waivers. Line Of Credit Facility, Repayment Option [Domain] Line Of Credit Facility, Repayment Option [Domain] Line Of Credit Facility, Repayment Option [Domain] Energy Infrastructure Energy Infrastructure [Member] Energy Infrastructure Asset Sold under Agreement to Repurchase [Table] Asset Sold under Agreement to Repurchase [Table] Net Change in Unrealized Gain (Loss) on Derivative Instruments Net Change in Unrealized (Gain) Loss on Derivative Instruments IncreaseDecreaseInUnrealizedGainLossOnDerivativeInstruments Increase decrease in unrealized gain loss on derivative instruments Total Net Assets Partners' Capital Accounts Payable and Accrued Expenses Accounts Payable, Accrued Expenses and Other Liabilities Accounts Payable and Other Accrued Liabilities Interest and Dividend Receivable and Other Assets Increase (Decrease) in Other Operating Assets Units issued (in shares) Stock Issued During Period, Shares, New Issues PEO PEO [Member] Deferred Assets Increase (Decrease) in Deferred Charges Management and service fees, rate Management and Service Fees, Rate Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Maximum amount outstanding Line of Credit Facility, Maximum Amount Outstanding During Period Total Investments, Investments in Affiliated Investee Funds, Cash and Cash Equivalents and Derivative Instruments, Fair Value Investment Owned, Money Market Funds, And Derivatives, Fair Value Investment Owned, Money Market Funds, And Derivatives, Fair Value Debt Investments Debt Investments [Member] Debt Investments [Member] Deferred Offering Costs Amortization Deferred Offering Costs Amortization Deferred offering costs amortization. Net Realized and Unrealized Gain (Loss) on Investments, Derivative Instruments and Translation of Assets and Liabilities in Foreign Currencies Gain (Loss), Investment and Derivative, Operating, and Foreign Currency Transaction, before Tax [Abstract] Class S Limited Partnership ACC Units Class S Limited Partnership ACC Units [Member] Class S Limited Partnership ACC Units Total Investments, Investments in Affiliated Investee Funds, Cash and Cash Equivalents and Derivative Instruments, cost Investment Owned, At Cost, Money Market Funds, At Carrying Value And Derivatives, At Cost Investment Owned, At Cost, Money Market Funds, At Carrying Value And Derivatives, At Cost Expenses without waivers Investment Company, Expense Ratio, Expenses Without Waivers Investment company, expense ratio, expenses without waivers. Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Classes of limited partnership units Number Of Classes Of Limited Partnership Units Number Of Classes Of Limited Partnership Units Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Second Unused Amount Second Unused Amount [Member] Second unused amount. Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Percentage of interest in aggregator Percentage of Interest in Aggregator Percentage of interest in the aggregator. Debt Investments - Liquids Liquid Debt Investment [Member] Liquid debt investment. Advanced expenses reimbursement allowed duration term Advanced Expenses Reimbursement Allowed Duration Term Advanced expenses reimbursement allowed duration term. Money Market Fund Money Market Funds [Member] Investment Company, Change in Net Assets [Line Items] Investment Company, Change in Net Assets [Line Items] Investment Company [Abstract] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Net Increase in Net Assets (in dollars per share) Investment Company, Investment Income (Loss) from Operations, Per Share Units outstanding, end of period (in shares) Common Stock, Shares, Outstanding Schedule of Quantitative Inputs and Assumptions used for Valuation of Investments Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Award Timing Disclosures [Line Items] Derivative Asset, Fair Value as a Percentage of Net Assets Derivative Asset, Net Asset, Percentage Derivative Asset, Net Asset, Percentage Investment Manager Investment Manager [Member] Investment manager. Entity Current Reporting Status Entity Current Reporting Status Disclosure of Repurchase Agreements [Abstract] Net Cash Provided by (Used in) Financing Activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Liabilities Liabilities, Fair Value Disclosure [Abstract] Net Change in Unrealized Gain (Loss) on Investment in BXINFRA U.S. Unrealized Gain (Loss) on Investments Total Return Based on Net Asset Value Investment Company, Total Return Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Stockholders' Equity Note [Abstract] Deferred offering costs Deferred Offering Costs Proceeds from Line of Credit Proceeds from Long-Term Lines of Credit Adjustments to Reconcile Net Increase (Decrease) in Net Assets Resulting from Operations to Net Cash Provided by (Used in) Operating Activities Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Equity Investments Equity Securities, Investment Summary [Member] Accrued waived expenses Accrued Waived Expenses Accrued waived expenses. Aggregator transactional NAV Aggregator Transactional NAV Aggregator Transactional NAV. Financing Activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Investment in the Aggregator [Table] Investment in the Aggregator [Table] Investment in the aggregator. Unused commitment fee percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Repurchase Agreements Repurchase Agreements [Text Block] Repurchase agreements. Industrials Industrials [Member] Industrials Financial Instruments [Domain] Financial Instruments [Domain] Extension Of Credit Extension Of Credit [Member] Extension Of Credit Other Other Income Derivative Assets Derivative Asset, Fair Value Derivative Asset Limited Partners' Capital Account by Class [Axis] Limited Partners' Capital Account by Class [Axis] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Proceeds from Units Issued Stock Issued During Period, Value, New Issues Partnership Agreement and Investment Management Agreement Partnership Agreement and Investment Management Agreement [Member] Partnership agreement and investment management agreement. Sales and Proceeds from Investments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Affiliates Affiliates [Policy Text Block] Affiliates policy. Schedule of Capital Transactions and Differing Fee Arrangements Investment Company, Financial Highlights [Table Text Block] Healthcare Healthcare Sector [Member] Accrued Performance Participation Allocation Other Accrued Liabilities Other Valuation Technique Other [Member] Valuation Technique other. Issuance of Class I-Series I Units for Performance Participation Allocation Stock Issued Consumer and Services Consumer and Services [Member] Consumer and Services Related Party Transaction [Table] Related Party Transaction [Table] Cash Cash [Member] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Derivative Instruments Derivative, Gain (Loss) on Derivative, Net Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Current Fiscal Year End Date Current Fiscal Year End Date Offering expenses Offering Expenses Offering expenses. Units issued (in shares) Units issued (in shares) Limited Partners' Capital Account, Units Issued Investment owned, balance, shares (in shares) Investment Owned, Balance, Shares Net Amortization of Debt Investments Amortization Of Debt Investments Liquid Amortization of debt investments liquid. Due from Affiliates Due From Affiliate Due from affiliate. Proceeds from Repurchase Agreements Proceeds From Repurchase Agreements Proceeds from repurchase agreements Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Infrastructure Services Infrastructure Services [Member] Infrastructure Services Derivative [Line Items] Derivative [Line Items] Related Party Transaction [Domain] Related Party Transaction [Domain] Proceeds from Investment in the Aggregator Proceeds From Subsidiaries Proceeds From Subsidiaries Net Change in Unrealized (Gain) Loss on Translation of Assets and Liabilities in Foreign Currencies Unrealized Gain (Loss), Foreign Currency Transaction, after Tax Distribution Reinvested Other Significant Noncash Transaction, Distributions Reinvested Other Significant Noncash Transaction, Distributions Reinvested Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Income Tax, Examination [Table] Income Tax, Examination [Table] Investment in BXINFRA U.S. at Fair Value (Cost $1,548,147,587 as of September 30, 2026 and $944,504,000 as of December 31, 2025)' Fair Value Investment in the Aggregator at Fair Value (Cost $5,529,842,979 as of September 30, 2026; $3,324,540 as of December 31, 2025) Investment Owned, Fair Value Various Various [Member] Various Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Measure: Measure [Axis] Balance, Beginning of Period Balance, End of Period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Derivative Assets, Notional Derivative Assets Notional Amount Derivative assets notional amount. BXINFRA Warehouse BXINFRA Warehouse [Member] BXINFRA warehouse . Unfunded investment commitments Unfunded Investment Commitments Unfunded investment commitments. Other Receivable, after Allowance for Credit Loss, Related Party [Extensible Enumeration] Other Receivable, after Allowance for Credit Loss, Related Party [Extensible Enumeration] Accrued administration fees Accrued Administration Fees Accrued administration fees. Accounts Receivable Increase (Decrease) in Accounts Receivable Related Party Related Party [Member] Class D- TE-ACC Units Class D-TE-ACC Units [Member] Class D-TE-ACC Units Cash Paid for Income Taxes Income Tax Paid, after Refund Received Proceeds from Issuance of Units Proceeds from Issuance of Common Limited Partners Units Entity Interactive Data Current Entity Interactive Data Current Variable Rate [Axis] Variable Rate [Axis] Deferred Tax Liabilities Deferred Tax Liabilities Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Limited Liability Company or Limited Partnership, Business Organization and Operations [Abstract] Conversion of Units Between Classes or Series (in shares) Stock Issued During Period, Shares, Conversion of Units Entity Small Business Entity Small Business Termination Date Trading Arrangement Termination Date Notional Notional [Member] Notional [Member] Class I Series II Units Series II Units Class I Series II Units [Member] Class I Series II Units Subsequent Events [Abstract] Transportation Infrastructure Transportation Infrastructure [Member] Transportation Infrastructure Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Distributions Payable Distributions Payable Distributions Payable Distribution Payable MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Proceeds from Investments Proceeds from Disposition of Investment, Operating Activity Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Document Type Document Type Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value as of Grant Date Award Grant Date Fair Value Net asset value per share (in dollars per share) Net Asset Value, Beginning of Period (in dollars per share) Net Asset Value, End of Period (in dollars per share) Net Asset Value Per Share Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Open Swap Contract, Identifier [Axis] Open Swap Contract, Identifier [Axis] Cash and Cash Equivalents Cash and Cash Equivalents [Member] Class I Series I Units Series I Units Class I-Series I Units [Member] Class I-Series I Units Arrangement Duration Trading Arrangement Duration Subsequent Event [Line Items] Subsequent Event [Line Items] Statement of Stockholders' Equity [Abstract] Uncommitted Line Of Credit Agreement Uncommitted Line Of Credit Agreement [Member] Uncommitted Line Of Credit Agreement Percentage of listing investment of the aggregator Percentage of Listing Investment of Aggregator Percentage of listing Investment of the aggregator. Redemptions Payable, Net of Early Redemption Deduction Redemptions Payable Other Significant Noncash Transaction, Payments For Repurchase Of Units Net Of Early Repurchase Deduction Other Significant Noncash Transaction, Payments For Repurchase Of Units Net Of Early Repurchase Deduction Local Phone Number Local Phone Number BXINFRA U.S. BXINFRA U.S. [Member] BXINFRA U.S. Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Schedule of Valuation of Aggregator's Investments Equity Method Investment Summarized Financial Information [Table Text Block] Equity method investment summarized financial information. Deferred Costs Amortization Amortization of Other Deferred Charges Distribution Type [Domain] Distribution Type [Domain] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Pledged Status [Domain] Pledged Status [Domain] Warehousing Fees Waived Warehousing Fees Waived Warehousing fees waived. Net Investment Income (Loss) Before Provision for (Benefit of) Taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] First Unused Amount First Unused Amount [Member] First unused amount. Commitments and Contingencies Commitments and Contingencies Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Deferred Assets Deferred Costs and Other Assets Accounts Payable, Accrued Expenses, and Other Liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Fair Value Investment Company, Financial Support to Investee Contractually Required, Not Provided, Fair Value, Amount Investment Company, Financial Support to Investee Contractually Required, Not Provided, Fair Value, Amount Redemptions Receivable Redemptions Receivable Redemptions Receivable Redemptions receivable. Deferred Tax Liabilities Deferred Tax Liabilities Increase (Decrease) in Deferred Liabilities Unpledged Asset Not Pledged as Collateral [Member] Liabilities and Net Assets Liabilities and Net Assets Liabilities and Equity [Abstract] Repurchase Agreements Repurchase Agreements Repurchase agreements. Accrued Servicing Fees Accrued Servicing Fees Accrued Servicing Fees All Award Types Award Type [Domain] Total Investments, Investments in Affiliated Investee Funds, Cash and Cash Equivalents and Derivative Instruments, Fair Value as a Percentage of Net Assets Investment Owned, Money Market Funds, And Derivatives, Percent Of Net Assets Investment Owned, Money Market Funds, And Derivatives, Percent Of Net Assets Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Technology, Media and Entertainment Technology, Media and Entertainment [Member] Technology, Media and Entertainment Distributions per unit (in dollars per share) Distribution Made to Limited Partner, Distributions Declared, Per Unit Investments and Fair Value Measurement Fair Value Disclosures [Text Block] Level III Fair Value, Inputs, Level 3 [Member] Pledged to Counterparties Asset Pledged as Collateral [Member] Supplemental Disclosure of Cash Flows Information Supplemental Cash Flow Information [Abstract] Common Stock, Shares Authorized, Unlimited [Fixed List] Common Stock, Shares Authorized, Unlimited [Fixed List] Investments pledged as collateral Reported Securities Pledged As Collateral At FairValue Reported securities pledged as collateral at fair value. PEO Name PEO Name Geographical [Axis] Geographical [Axis] NAV Fair Value Measured at Net Asset Value Per Share [Member] Investment, Issuer Affiliation [Axis] Investment, Issuer Affiliation [Axis] Series I-TE Units Class I Series I-TE Units [Member] Class I-TE Series I Units Cash Paid for Income Taxes Income Tax Paid, before Refund Received Interest rate Line of Credit Facility, Interest Rate During Period Water And Waste Water And Waste [Member] Water And Waste Administration fee payable Administration Fee Payable Administration Fee Payable. Other Assets Interest and Dividend Receivable and Other Assets Other Assets Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Other Liability, Related Party [Extensible Enumeration] Other Liability, Related Party [Extensible Enumeration] Legal Entity [Axis] Legal Entity [Axis] Up to 30 Days Maturity Less than 30 Days [Member] Management Fee Payable Management Fee Payable Beginning of Period End of Period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Interest rate Debt Instrument Loan To Value Ratio Applicable Limit Debt Instrument Loan To Value Ratio Applicable Limit Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Base Rate Base Rate [Member] Cash, cost Cash, Carrying Value Cash, Carrying Value Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Gross management fee Gross Management Fee Gross management fee. Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Investment in BXINFRA U.S. Investment in the Aggregator Investment In Subsidiaries Investment in bxinfra aggregator Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Debt Instrument [Axis] Debt Instrument [Axis] Subsequent Event [Table] Subsequent Event [Table] Vehicle investments, percentage Equity Method Investment, Ownership Percentage Investment in BXINFRA U.S. Investment in the Aggregator Investment In The Aggregator [Text Block] Investment in the aggregator. Performance Participation Allocation Labor and Related Expense Net Assets Members' Equity Notes Disclosure [Text Block] Limited Partnership Unit Limited Partners' Capital Account Management Fees Offset and Waived Management Fees Offset And Waived [Policy Text Block] Management fees offset and waived. Due to Affiliates Increase (Decrease) in Due to Affiliates Warehousing Fees Warehousing Fees Warehousing Fees. Related party transaction, amounts of transaction Related Party Transaction, Amounts of Transaction Investment, Name [Domain] Investment, Name [Domain] Long-Term Debt, Type [Domain] Long-Term Debt, Type [Domain] Measurement Input Type [Axis] Measurement Input Type [Axis] Shares received for equity (in shares) Performance Participation Allocation, Shares Received Performance Participation Allocation, Shares Received Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Schedule of Impact to Condensed Consolidated Statements of Operations from Derivative Instruments Derivative Instruments, Gain (Loss) [Table Text Block] Warehousing Agreement Warehousing Agreement [Member] Warehousing agreement. Award Type Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Real Estate Real Estate [Member] Bond Futures Contracts Bond Future [Member] Payable for Investments Purchased Increase (Decrease) in Payable for Investment Purchased Net Assets Partners' Capital [Abstract] Amounts Subject to an Enforceable Master Netting Arrangement Amounts Of Enforceable Master Netting Arrangement Amounts of enforceable master netting arrangement. Net Realized Gain (Loss) on Investments, Derivative Instruments and Translation of Assets and Liabilities in Foreign Currencies Net Realized (Gain) Loss on Investments, Derivative Instruments and Translation of Assets and Liabilities in Foreign Currencies Realized Gain (Loss), Investment and Derivative, Operating, after Tax Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Investment Holdings [Table] Investment Holdings [Table] Capital Units by Class [Axis] Capital Units by Class [Axis] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Unfunded Commitment Investment Company, Financial Support to Investee Contractually Required, Not Provided, Amount Debt Investments Debt Securities, Available-for-Sale Offering Cost Payable Offering Cost Payable [Member] Offering Cost Payable Limited Partners' Capital Account, Class [Domain] Limited Partners' Capital Account, Class [Domain] Follow On Extensions Follow On Extensions [Member] Follow On Extensions Income Recognition Income Recognition [Policy Text Block] Disclosure of accounting policy for revenue. Includes revenue from contract with customer and from other sources. Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Dividend Receivable Increase (Decrease) in Dividends Receivable Net Change in Unrealized (Gain) Loss on Investment in BXINFRA U.S. Net Change in Unrealized (Gain) Loss on Investment in the Aggregator Unrealized Gain (Loss), Investment and Derivative, Operating, after Tax Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Derivative Contract [Domain] Derivative Contract [Domain] Equity Awards Adjustments Equity Awards Adjustments [Member] Name Of Investment Group [Axis] Name Of Investment Group [Axis] Name Of investment group. Administration Fees Payable Increase (Decrease) in Administrative Fee Payable Total Liabilities and Net Assets Liabilities and Equity Net Realized Gain (Loss) on Investments, Derivative Instruments and Translation of Assets and Liabilities in Foreign Currencies Realized Investment Gains (Losses) Employee Stock Option Share-Based Payment Arrangement, Option [Member] Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Overnight and Continuous Maturity Overnight and on Demand [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Industry Sector [Domain] Industry Sector [Domain] Class S Units Class S Units Class S Units [Member] Class S units. Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Related and Nonrelated Parties [Domain] Related and Nonrelated Parties [Domain] Repurchase Agreements [Line Items] Repurchase Agreements [Line Items] Repurchase Agreements [Line Items] Fair Value as a Percentage of Net Assets Investment Owned, Net Assets, Percentage Realized Gain (Loss) Derivative Realized Gain [Member] Derivative Realized Gain [Member] Input Discount To Sale Measurement Input Discount To Sale [Member] Measurement input discount to sale. Tabular List, Table Tabular List [Table Text Block] Transaction Price Valuation Technique, Transaction Price [Member] Valuation Technique, Transaction Price Partners capital account units redeemed (in shares) Partners' Capital Account, Units, Redeemed Name Awards Close in Time to MNPI Disclosures, Individual Name Investment, Identifier [Axis] Investment, Identifier [Axis] Investment company, expense ratio, after fee waiver and before incentive fee deduction Investment Company, Expense Ratio, after Fee Waiver and before Incentive Fee Deduction Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Distributions Distribution [Policy Text Block] Distribution. Expense Support Expense Support Expense support. Administration Fees General and Administrative Expense Investment Company, Commitment, Scenario [Domain] Investment Company, Commitment, Scenario [Domain] Investment Company, Commitment, Scenario [Domain] Net Change in Unrealized Gain (Loss) Derivative, Gain (Loss) on Derivative, Net [Abstract] Distributions (in dollars per share) Investment Company, Distribution to Shareholders, Per Share Period of units outstanding Redemption Offering Program, Outstanding Redemption Requests Subject To Early Redemption Reduction, Period Redemption Offering Program, Outstanding Redemption Requests Subject To Early Redemption Reduction, Period Class D Limited Partnership Units Class D Limited Partnership Units [Member] Class D limited partnership units. Adjustment to Compensation: Adjustment to Compensation [Axis] Foreign Currency Contracts (EUR) Foreign Exchange Contract, EUR [Member] Foreign Exchange Contract, EUR Accounts Payable, Accrued Expenses and Other Liabilities Increase (Decrease) in Other Accounts Payable and Accrued Liabilities Class of Stock [Domain] Class of Stock [Domain] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Distributions Paid in Cash Distributions Paid In Cash Distributions paid in cash Cash Paid for Interest Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Blackstone Infrastructure Strategies (TE) L.P. Blackstone Infrastructure Strategies (TE) L.P. [Member] Blackstone Infrastructure Strategies (TE) L.P. Accrued Performance Participation Allocation Investment Company, Expense Ratio after Incentive Allocation Schedule of Transactions in Units Schedule of Stock by Class [Table Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Total assets, fair value Total Assets Assets, Fair Value Disclosure Investment equity securities Investment Equity Securities Investment Equity Securities. Aggregator acquired number of loans Aggregator Acquired Number Of Loans Aggregator Acquired Number Of Loans Name Measure Name Accounting Policies [Line Items] Accounting Policies [Line Items] Accounting Policies [Line Items] Series III-TE Units Class I-TE Series III Units [Member] Class I-TE Series III Units Income Taxes Income Tax Disclosure [Text Block] Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] BXINFRA Aggregator (CYM) L.P. BXINFRA Aggregator (CYM) L.P. [Member] BXINFRA Aggregator (CYM) L.P. Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Investment Company, Financial Highlights [Table] Investment Company, Financial Highlights [Table] Derivative Type [Domain] Derivative Type [Domain] Derivative Type [Domain] Repurchase Agreements Repurchase Agreements, Valuation, Policy [Policy Text Block] Entity Filer Category Entity Filer Category Minimum utilization percentage three Line Of Credit Facility, Minimum Utilization, Percentage, Range Three Line Of Credit Facility, Minimum Utilization, Percentage, Range Three Name Trading Arrangement, Individual Name Cash and Cash Equivalents Cash and Cash Equivalents, cost Cash and Cash Equivalent General Partner General Partner [Member] Greater than 90 days Maturity Greater than 90 Days [Member] APAC APAC [Member] APAC Foreign Currency Contracts (GBP) Foreign Exchange Contract, GBP [Member] Foreign Exchange Contract, GBP Third Party Pricing Valuation Technique Third Party Pricing [Member] Valuation Technique Third Party Pricing [Member] Expense Support Expense Support [Policy Text Block] Expense support policy text block. Derivative Assets at Fair Value Derivative Assets at Fair Value [Member] Derivative Assets at Fair Value Company Selected Measure Amount Company Selected Measure Amount Class D Limited Partnership ACC Units Class D Limited Partnership ACC Units [Member] Class D Limited Partnership ACC Units Percentage of annual hurdle amount Percentage Of Annual Hurdle Amount Percentage of annual hurdle amount. Proceeds from Investment in BXINFRA U.S. Proceeds from Equity Method Investment, Distribution Derivative assets at cost Derivative Assets, Cost Derivative assets at cost. Derivative Liabilities, Notional Derivative Liabilities Notional Amount Derivative liabilities notional amount. Repayment of Repurchase Agreements Repayment Of Repurchase Agreements Repayment of repurchase agreements. Repayment period Line of Credit Facility, Repayment Period Line of Credit Facility, Repayment Period Changes in Unrealized Gain (Loss) Included in Earnings Related to Financial Assets Still Held at the Reporting Date Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) SOFR Secured Overnight Financing Rate (SOFR) [Member] Measurement [Domain] Measurement [Domain] Measurement [Domain] Net Realized and Unrealized Gain (Loss) on Investments Net Realized and Unrealized Gain Loss on Investments [Policy Text Block] Realized and unrealized gain loss on investments policy text block. Servicing Fees Servicing Fees Servicing fees. Brentwood Credit Facility Brentwood Credit Facility [Member] Brentwood credit facility. Total Income Gross Investment Income, Operating Deferred Tax Asset Increase (Decrease) In Deferred Tax Asset Increase (Decrease) In Deferred Tax Asset Statement of Partners' Capital [Abstract] Derivative Liabilities Derivative Liability, Fair Value Derivative Liability Non-PEO NEO Non-PEO NEO [Member] Foreign Currency Foreign Currency Transactions and Translations Policy [Policy Text Block] Entity Address, Address Line One Entity Address, Address Line One Servicing Fees (in dollars per share) Investment Company Servicing Fees Per Share Investment company servicing fees per share. Provision for (Benefit of) Taxes Provision for (Benefit of) Taxes Income Tax Expense (Benefit) Award Timing Method Award Timing Method [Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Net Increase (Decrease) Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Derivative liabilities at cost Derivative Liability, Cost Derivative liabilities at cost. Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Repurchase Agreements [Table] Repurchase Agreements [Table] Repurchase Agreements [Table] Number of cross-transactions Number Of Cross Transactions Number Of Cross Transactions Net Increase in Net Assets Resulting from Operations Net Increase in Net Assets Resulting from Operations Net Increase in Net Assets Resulting from Operations Net Income (Loss) Attributable to Parent Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Discounted Cash Flow Valuation Technique, Discounted Cash Flow [Member] Statement [Table] Statement [Table] Investment in the Aggregator [Abstract] Investment in the aggregator. Restatement Determination Date: Restatement Determination Date [Axis] Class I Series III Units Series III Units Class I Series III Units [Member] Class I Series III Units Derivative Liabilities at Fair Value Derivative Liabilities at Fair Value [Member] Derivative Liabilities at Fair Value Unused Amount Term [Axis] Unused Amount Term [Axis] Unused amount term. Derivative Assets, Fair Value Derivative Asset, Subject to Master Netting Arrangement, before Offset Affiliated Investee Funds Affiliated Investee Funds Investments in Affiliated Investee Funds [Member] Investments in Affiliated Investee Funds [Member] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Derivative Instruments Derivative Instruments [Policy Text Block] Derivative instruments. Investments in Affiliated Investee Funds at Fair Value (Cost $1,543,213,486 as of September 30, 2026; $802,546,000 as of December 31, 2025) Investments in Affiliated Investee Funds Investments in Affiliates, Subsidiaries, Associates, and Joint Ventures, Fair Value Disclosure Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Financial Support to Nonconsolidated Legal Entity [Domain] Financial Support to Nonconsolidated Legal Entity [Domain] Derivative Instruments and Hedging Activities Disclosure [Abstract] Affiliated Entity [Member]