75000 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 75010 - Statement - Consolidated Statements of Assets and Liabilities link:presentationLink link:calculationLink link:definitionLink 75020 - Statement - Consolidated Statements of Assets and Liabilities (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 75030 - Statement - Consolidated Statements of Operations link:presentationLink link:calculationLink link:definitionLink 75040 - Statement - Consolidated Statements of Changes in Net Assets link:presentationLink link:calculationLink link:definitionLink 75050 - Statement - Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 75060 - Statement - Condensed Consolidated Schedule of Investments link:presentationLink link:calculationLink link:definitionLink 75060 - Statement - Condensed Consolidated Schedule of Investments [Default] link:presentationLink link:calculationLink link:definitionLink 75070 - Statement - Condensed Consolidated Schedule of Investments (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 995455 - Disclosure - Organization link:presentationLink link:calculationLink link:definitionLink 995465 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 995475 - Disclosure - Investments link:presentationLink link:calculationLink link:definitionLink 995485 - Disclosure - Fair Value Measurements - Investments link:presentationLink link:calculationLink link:definitionLink 995495 - Disclosure - Derivatives link:presentationLink link:calculationLink link:definitionLink 995505 - Disclosure - Related Party Transactions link:presentationLink link:calculationLink link:definitionLink 995515 - Disclosure - Net Assets link:presentationLink link:calculationLink link:definitionLink 995525 - Disclosure - Distributions link:presentationLink link:calculationLink link:definitionLink 995535 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 995545 - Disclosure - Segment Reporting link:presentationLink link:calculationLink link:definitionLink 995555 - Disclosure - Financial Highlights link:presentationLink link:calculationLink link:definitionLink 995565 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 995575 - Disclosure - Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 995585 - Disclosure - Related Party Transactions (Tables) link:presentationLink link:calculationLink link:definitionLink 995595 - Disclosure - Net Assets (Tables) link:presentationLink link:calculationLink link:definitionLink 995605 - Disclosure - Fair Value Measurements - Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 995615 - Disclosure - Derivatives (Tables) link:presentationLink link:calculationLink link:definitionLink 995625 - Disclosure - Financial Highlights (Tables) link:presentationLink link:calculationLink link:definitionLink 995635 - Disclosure - Subsequent Events (Tables) link:presentationLink link:calculationLink link:definitionLink 995645 - Disclosure - Organization - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995655 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995665 - Disclosure - Investments - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 995675 - Disclosure - Fair Value Measurements - Investments - Summary of Fair Value Measurements of Investments, By Major Class within Fair Value Hierarchy (Details) link:presentationLink link:calculationLink link:definitionLink 995685 - Disclosure - Fair Value Measurements - Investments - Summary of Reconciliation of Level III Investments (Details) link:presentationLink link:calculationLink link:definitionLink 995695 - Disclosure - Fair Value Measurements - Investments - Ranges of Significant Unobservable Inputs to Value Level 3 Assets (Details) link:presentationLink link:calculationLink link:definitionLink 995705 - Disclosure - Derivatives - Schedule of Aggregate Notional Amount and Fair Value of the Derivative Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 995715 - Disclosure - Derivatives - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 995725 - Disclosure - Related Party Transactions - Schedule of Subject to Recoupment Pursuant to the Expense Limitation Agreement (Details) link:presentationLink link:calculationLink link:definitionLink 995735 - Disclosure - Related Party Transactions - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995745 - Disclosure - Net Assets - Schedule of Net Assets (Details) link:presentationLink link:calculationLink link:definitionLink 995755 - Disclosure - Net Assets - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 995765 - Disclosure - Distributions - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995775 - Disclosure - Commitments and Contingencies - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995785 - Disclosure - Segment Reporting - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995795 - Disclosure - Financial Highlights - Schedule of the Financial Highlights (Details) link:presentationLink link:calculationLink link:definitionLink 995805 - Disclosure - Subsequent Events - Schedule of Investors Shares Sold (Details) link:presentationLink link:calculationLink link:definitionLink 995815 - Disclosure - Subsequent Events - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995825 - Disclosure - Subsequent Events - Schedule of Share Repurchases (Details) link:presentationLink link:calculationLink link:definitionLink Related Party Transaction [Table] Reclassification, Type [Domain] Essential Water and Wastewater Services for Number of Individual Customers Essential water and wastewater services for number of individual customers. Essential water and wastewater services, number of individual customers Total Expense Reimbursement recoupable by related party Total Expense Reimbursement recoupable by related party. Total expense reimbursement recoupable Cash Including Cash Denominated in Foreign Currencies and Cash Equivalents Cash, including cash denominated in foreign currencies and cash equivalents. Cash, including cash denominated in foreign currencies and cash equivalents Accrued Professional Fees Legal and professional fees payable Alternative Investment, Measurement Input Range (Weighted Average) Commitments and Contingencies Commitments and contingencies (Note 9) Weighted Average Number of Shares Outstanding, Diluted Weighted Average Number of Shares Outstanding, Diluted, Total Weighted average of shares outstanding at end of the period, diluted Industry Sector [Axis] Share repurchases Stock Repurchased During Period, Shares Aggregate Number of Shares Repurchased Minimum [Member] Open Forward Foreign Currency Contract [Table Text Block] Schedule of Aggregate Notional Amount and Fair Value of the Derivative Instruments Subsequent Event, Date Subsequent event, date Essential Water and Wastewater Services Essential water and wastewater services. Essential water and wastewater services Foreign Exchange Contract Settlement Date December Twenty One Two Thousand Twenty Six One [Member] Foreign Exchange Contract Settlement Date December Twenty One Two Thousand Twenty Six One. 12/21/2026 Performance Allocation, Catch-Up Percentage [Member] Performance Allocation, Catch-Up Percentage. Performance Allocation, Catch-Up Percentage Common Stock, Shares, Issued Common stock, shares, issued Investment Company Operating Income (Expenses) Ratio Investment company operating income (expenses) ratio. Total operating expenses Seven Seas Water Group [Member] Seven Seas Water Group. Ranges of Significant Unobservable Inputs to Value Level 3 Assets Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block] Cash in foreign currencies Cash Held in Foreign Currency, at Carrying Value Cash Held in Foreign Currency, at Carrying Value Related Party Transaction [Line Items] Director Fee Directors' fees and expenses Management fee waiver offset Management Fee Waiver Offset Management fee waiver offset. Subsequent Event Type [Domain] EQT AI Fund, EQT Infrastructure's new AI Fund [Member] EQT AI Fund, EQT Infrastructure's new AI Fund. Common Class T Shares [Member] Common Class T shares. Foreign Exchange Contract Settlement Date March Nineteen Two Thousand Twenty Seven Two [Member] Foreign Exchange Contract Settlement Date March Nineteen Two Thousand Twenty Seven Two. 3/19/2027 Net asset value policy text block. Net Asset Value Policy [Text Block] Calculation of Net Asset Value Disclosure of rate of limitation of annual specified expenses. Disclosure Of Rate Of Limitation Of Annual Specified Expenses Disclosure of rate of limitation of annual specified expenses Customers [Member] Customers. Increase (Decrease) in Deferred Offering Costs Increase/(decrease) in deferred offering costs. Increase in deferred offering costs Investment Company, Financial Highlights [Line Items] General and Administrative Expense General and Administrative Expense, Total General and administrative expenses Income Statement [Abstract] Derivative Liability, Notional Amount Currency Purchase Notional Receivables, Net, Current Due from Manager Reclassified Out of Legal and Professional Fees Into General and Administrative Expenses [Member] Reclassified Out of Legal and Professional Fees Into General and Administrative Expenses [Member] Reclassified out of legal and professional fees into general and administrative expenses. Related and Nonrelated Parties [Domain] Investment Income, Operating, after Expense and Tax Investment Income, Operating, after Expense and Tax, Total Net investment income/(loss) Document Period End Date Percentage of Infrastructure Asset Values Percentage of Infrastructure Asset Values Infrastructure Asset Values Document Information [Table] Increase (Decrease) in Other Payables Increase (decrease) in other payables. Increase in other payables Increase in other payables Common Class H Shares [Member] Common Class H shares. North America [Member] General and Administrative Expenses Payable General and administrative expenses payable. General and administrative expenses payable Common Stock, Shares Authorized Common stock, shares authorized Statement of Stockholders' Equity [Abstract] Interest and Dividends Payable, Current [Abstract] Schedule of Investments [Abstract] Percentage of Hurdle Amount Subject to Investor Shares Percentage of hurdle amount subject to investor shares. Percentage of hurdle amount subject to investor shares Measurement Input, Offered Price [Member] Weight ascribed to Transaction Price/Other Dividend Distribution Declared Or Paid Dividend distribution declared or paid. Distribution declared or paid Foreign Currency Transactions and Translations Policy [Policy Text Block] Foreign Currency Translation Investment Company, Net Asset Value, Per Share, Period Increase (Decrease) Investment Company, Net Asset Value, Per Share, Period Increase (Decrease), Total Net increase/(decrease) in net assets attributed to shareholders Essential water and wastewater services, number of homes Essential Water and Wastewater Services for Number of Homes Essential water and wastewater services for number of homes. Common Class M-S Shares. Common Class M-S [Member] Transfer in/out Stock Transfer During Period Value Stock transfer during period value. Investment Company, Net realized and change in unrealized appreciation, Per Share Investment company, net realized and change in unrealized appreciation, per share. Net realized and change in unrealized appreciation Organization costs. Organization Costs Organization costs Class A-I Shares, Class A-D Shares and Class A-S Shares [Member] Class A-I Shares, Class A-D Shares and Class A-S Shares. Class A-I Shares, Class A-D Shares and Class A-S Shares Assets Total assets Investment Company, Share Issuance, Per Share Consideration from the issuance of shares, net Related Party Transaction [Axis] Reclassification, Comparability Adjustment [Policy Text Block] Reclassifications Realized Investment Gains (Losses) [Abstract] Net realized gain/(loss) on foreign currency transactions: Title and Position [Domain] Net Operating Expenses Net Operating Expenses Net operating expenses Unrealized Appreciation on Foreign Currency Forward Contracts Unrealized appreciation on foreign currency forward contracts. Foreign currency forward contracts, at fair value Offering costs payable. Offering costs payable Offering costs payable Madison Energy [Member] Madison Energy. Schedule of Sale of Stock by Subsidiary or Equity Method Investee Disclosure [Table Text Block] Schedule of Investors Shares Sold Percentage Increase (Decrease) in Hypothetical Change Percentage Increase (Decrease) in Hypothetical Change Hypothetical Change Cash and Cash Equivalent, Held in Foreign Currency Cash in foreign currencies, at fair value Cash in foreign currencies, at fair value (cost: $149 and $0, respectively) Performance Allocation Performance Allocation Policy [Policy Text Block] Performance allocation policy. Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Equity, Attributable to Parent Ending Balance Net assets Beginning Balance Valuation Approach and Technique [Domain] Entity Address, Address Line Two Non-cash Change in Shareholder Servicing Fees Non-cash Change in Shareholder Servicing Fees Change in shareholder servicing fees Manager [Member] Manager Operating expenses before performance allocation (as a percent) Investment Company, Expense Ratio before Incentive Allocation Management fee payable, net Management Fee Payable Common Class D Shares [Member] Common Class D shares. Weighted Average [Member] Investment Company, Internal Rate of Return since Inception Internal rate of return on the NAV Number of Reportable Segments Number of reportable segments Homes [Member] Homes. Class D Shares and Class A-D Shares [Member] Class D shares and class A-D shares. Class D Shares and Class A-D Shares Foreign Exchange Contract Settlement Date March Nineteen Two Thousand Twenty Seven One [Member] Foreign Exchange Contract Settlement Date March Nineteen Two Thousand Twenty Seven One. 3/19/2027 Common Class M-I-TE shares. Common Class M-I-TE [Member] Stock, Class of Stock [Table] Ju:niz Energy GmbH [Member] Ju:niz Energy GmbH. Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Summary of Reconciliation of Level III Investments Geographical [Domain] Statistical Measurement [Axis] Investments in Money Market Funds Money Market Funds [Member] Entity Interactive Data Current Class S Shares, Class A-S Shares, Class M-S Shares and Class M-S-TE Shares Class S Shares, Class A-S Shares, Class M-S Shares and Class M-S-TE Shares [Member] Class s shares, class A-S shares, class M-S shares and class M-S-TE shares. Subsequent Event, Description Subsequent event, description Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Common Stock, Value, Issued Class Q Shares, 40 shares authorized, issued and outstanding Common stock value Management fee offset Management Fee Offset Management Fee Offset Liabilities Total liabilities Common Class M-S-TE shares. Common Class M-S-TE [Member] Ownership [Domain] Product and Service [Axis] Fair Value, Inputs, Level 3 [Member] Level III Waga Energy SA [Member] Waga Energy SA. Derivative Asset, Notional Amount Notional Arium Networks [Member] Arium Networks. Operating Expenses Operating expenses Total operating expenses Common Class M-S-TE USD Shares [Member] Common class M-S-TE USD shares. Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Purchases Total, Investments and money market funds percent of net assets Investment Owned And Money Market Funds Percent Of Net Assets Investment owned and money market funds percent of net assets. Fair Value, by Balance Sheet Grouping [Table] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Organization Fair Value Measurement Inputs and Valuation Techniques [Table] Shares Issued, Price Per Share Shares price Shares Issued During the Period Stock Issued During Period, Shares, New Issues Total of Shares Essential Water and Wastewater Services for Number of Businesses Essential water and wastewater services for number of businesses. Essential water and wastewater services, number of businesses Investment Company, Investment Income (Loss) Ratio Net investment income/(loss) (as a percent) Management Fee Percentage Management Fee Percentage [Member] Management Fee Percentage. Businesses [Member] Businesses. Aggregate Consideration Stock Repurchased During Period, Value Lumos [Member] Lumos. Scale Microgrids [Member] Scale Microgrids. Derivative Liability Derivative Liability, Total Fair Value Fair Value Related Party Transactions [Abstract] Investment Company, Financial Highlights [Table Text Block] Schedule of the Financial Highlights Investment Owned At Fair Value And Money Market Funds Fair Value Investment Owned At Fair Value And Money Market Funds Fair Value Total Investments and Money Market Funds Fair Value Income Tax, Policy [Policy Text Block] Income Taxes Subsequent Events [Text Block] Subsequent Events Fair Value Hierarchy and NAV [Axis] (Increase) Decrease in general and administrative expenses payable (Increase) decrease in general and administrative expenses payable. Increase in general and administrative expenses payable Performance Allocation, Percentage Of Remaining Excess Profits [Member] Performance Allocation, Percentage Of Remaining Excess Profits. Performance Allocation, Percentage of Remaining Excess Profits Investment Owned, Net Assets, Percentage Estimated Fair Value as a Percentage of Net Assets Unregistered Sales of Equity Securities [Member] Unregistered sales of equity securities. Proceeds from investments Payments for (Proceeds from) Investments Payments for (Proceeds from) Investments, Total Document Fiscal Period Focus Kelda Holdings Limited [Member] Kelda Holdings Limited. Derivatives, Fair Value [Line Items] Title and Position [Axis] Class D Shares [Member] Class D shares member. Subscriptions Totaling Received And Accepted Subscriptions totaling received and accepted. Subscriptions totaling received and accepted Cypress Creek [Member] Cypress Creek. Sale of Stock [Axis] Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Net increase in cash and cash equivalents and foreign currencies at fair value Entity Current Reporting Status Fair Value, Inputs, Level 1 [Member] Level I Class of Stock [Domain] Investment Company, Financial Highlights [Text Block] Financial Highlights Amortization of Deferred Charges Amortization of Deferred Charges, Total Deferred offering costs amortization Net realized gain/(loss) Realized Investment Gains (Losses) Realized Investment Gains (Losses), Total Financial Instrument [Axis] Document Transition Report Derivative Instruments Percent Of Net Assets Derivative Instruments Percent Of Net Assets Derivative instruments percent of net assets Commitments and Contingencies Disclosure [Abstract] Subsequent Event [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Investment Company Transfer of Shares Per Share Investment company transfer of shares per share. Transfer in/out Class A-S Shares [Member] Class A-S Shares Investment Company, Investment Income (Loss) from Operations, Per Share Investment Company, Investment Income (Loss) from Operations, Per Share, Total Net investment income/(loss) Beginning Balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Ending Balance Common Stock [Member] Accrued shareholder servicing fees Accrued shareholder servicing fees Derivative Instruments and Hedging Activities Disclosure [Text Block] Derivatives Percentage of Shareholder Servicing Fees Percentage of shareholder servicing fees. Percentage of shareholder servicing fees Investment [Text Block] Investments Statistical Measurement [Domain] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Equity, Attributable to Parent [Abstract] Net assets are comprised of: Weighted Average Number of Shares Outstanding, Basic Weighted Average Number of Shares Outstanding, Basic, Total Weighted average of shares outstanding at end of the period, basic McNair Parent Cooperatief [Member] McNair Parent Cooperatief. Assets [Abstract] Assets Expenses Recouped Or Reimbursed By Manager Expenses Recouped Or Reimbursed By Manager Expenses recouped/(reimbursed) by Manager Entity Central Index Key Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Increase (Decrease) in Servicing Fees Paid Increase (decrease) in servicing fees paid. Decrease in servicing fees paid 6/21/2027 Foreign Exchange Contract Settlement Date June Twenty One Two Thousand Twenty Seven Two [Member] Foreign Exchange Contract Settlement Date June Twenty One Two Thousand Twenty Seven Two. Class of Stock [Line Items] Current Fiscal Year End Date Document Quarterly Report Organization and offering costs. Organization and Offering Costs [Text Block] Organization and Offering Costs Stock Transfer During Period Shares Stock transfer during period shares. Transfers in/(out) during the Period Decrease (Increase) In Due From Manager Decrease/(increase) in due from manager. Increase in due from Manager Net Investment Income [Line Items] Aggregate Amount Payments to Acquire Businesses, Gross Fair Value, Inputs, Level 2 [Member] Level II Investment Income, Net Total investment income Net change in unrealized appreciation/(depreciation) Unrealized Gain (Loss) on Investments Net change in unrealized (appreciation)/depreciation on investments Net change in unrealized appreciation/(depreciation) on investments Business Combination [Abstract] Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Net cash used in operating activities Entity Incorporation, State or Country Code Sale of Stock, Number of Shares Issued in Transaction Aggregate Number of Shares Sold Net increase in net assets resulting from operations Net increase in net assets resulting from operations Ownership [Axis] Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Administrative Fees Expense Servicing fees Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Net Change In Unrealized Depreciation on Foreign Currency Translation Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Net Change In Unrealized Depreciation on Foreign Currency Translation Net change in unrealized depreciation on foreign currency translation Increase (Decrease) in Accrued Performance Allocation Increase (decrease) in accrued performance allocation. Increase in accrued performance allocation Equity Components [Axis] Investment Company, Total Return Total GAAP return attributed to Shares based on net asset value (as a percent) Net Realized Gains or Losses and Net Change in Unrealized Appreciation (Depreciation) on Investments Net Realized Gains or Losses and Net Change in Unrealized Appreciation (Depreciation) on Investments [Policy Text Block] Net realized gains or losses and net change in unrealized appreciation (depreciation) on investments. Statement of Cash Flows [Abstract] Uncertain Tax Positions [Policy Text Block] Uncertain tax positions. Uncertain Tax Positions Fair Value Hierarchy and NAV [Domain] Net Investment Income Net investment income/(loss) Urbaser [Member] Urbaser. Schedule of Investments [Line Items] Deferred Offering Costs Deferred offering costs Deferred offering costs amortization Percentage of High Water Mark Catch-Up Percentage of high water mark catch-up. Percentage of high water mark catch-up Unrealized Gain (Loss) on Derivatives Net change in unrealized appreciation/(depreciation) on foreign currency forward contracts Fair Value Disclosures [Text Block] Fair Value Measurements - Investments Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Net Change In Unrealized Appreciation Depreciation Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Net Change In Unrealized Appreciation Depreciation Net change in unrealized appreciation on investments Net Change in Unrealized (Appreciation) Depreciation on Foreign Currency Translation Net change in unrealized (appreciation)/depreciation on foreign currency translation. Net change in unrealized (appreciation)/depreciation on foreign currency translation Management Fee Expense Management fee incurred Management fee, net Incentive Fee Expense, Income-Based Performance allocation Performance Allocation Energy and Environmental [Member] Energy and environmental. Derivative Contract [Domain] Common Class A-I shares. Common Class A-I [Member] Class of Stock [Axis] Number of Operating Segments Number of operating segments Reworld Waste [Member] Reworld Waste. Common Class M-I Shares. Common Class M-I [Member] Foreign Exchange Contract [Member] Foreign Exchange Contract Foreign Currency Contracts [Member] Interest receivable Interest Receivable Common Class A-D Shares [Member] Common Class A-D shares. Constellation Cold Logistics [Member] Constellation Cold Logistics. Total realized gain/(loss) and change in unrealized appreciation/(depreciation) Realized Gain/(Loss) And Change in Unrealized Appreciation/(Depreciation) Realized gain/(loss) and change in unrealized appreciation/(depreciation). Reclassification, Type [Axis] Measurement Input, Discount Rate [Member] Weight Ascribed to Discounted Cashflow Portfolio Companies [Member] Portfolio Companies Portfolio companies Reclassification [Table] Net Asset Value Per Share Net asset value per share Net asset value per share at the end of period Net asset value per share at beginning of period Document Type Organization costs payable. Organization costs payable Organization costs payable Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Operating activities Common Class A-S shares. Common Class A-S [Member] Subsequent Event [Member] Shares Issued For Director's Fees Shares issued for director's fees. Class T Shares issued for director's fees Performance Participation Allocation, Excess Profits Percentage Allocated Performance Participation Allocation, Excess Profits Percentage Allocated [Member] Performance Participation Allocation, Excess Profits Percentage Allocated. Entity File Number Founders Share [Member] Founders Share. Founders Share Derivative Instrument Detail [Abstract] Entity Registrant Name A-Train AB [Member] A-Train AB [Member] A-Train AB. Schedule of Share Repurchases Class of Treasury Stock [Table Text Block] Accounting Policies [Abstract] Foreign Exchange Contract Settlement Date September Twenty One Two Thousand Twenty Six Two [Member] Foreign Exchange Contract Settlement Date September Twenty One Two Thousand Twenty Six Two. 9/21/2026 Price per share Shares Acquired, Average Cost Per Share Net Assets Net assets Net assets Net assets at end of period Entity Address, Address Line One Increase (Decrease) in Employee Related Liabilities Increase (Decrease) in Employee Related Liabilities, Total Decrease in directors' fees and expenses payable Performance Allocation, Excess Profits Percentage [Member] Performance Allocation, Excess Profits Percentage. Performance Allocation, Excess Profits Percentage Foreign Currency Forward Contracts, At Fair Value Foreign currency forward contracts, at fair value Foreign currency forward contracts, at fair value Supplemental disclosure of operating activities Supplemental Cash Flow Information [Abstract] Related Party Transactions Disclosure [Text Block] Related Party Transactions Entity Small Business Money Market Funds Percent Of Net Assets Money market funds percent of net assets Money market funds percent of net assets. Percentage of Dealer-Manager Ongoing Servicing Fees at Annual Rate Percentage of dealer-manager ongoing servicing fees at annual rate. Percentage of dealer-manager ongoing servicing fees at annual rate Disclosure of rate of limitation of reimbursement expenses. Disclosure Of Rate Of Limitation Of Reimbursement Expenses Disclosure of rate of limitation of reimbursement expenses Other payables Accounts Payable, Other Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Increase (Decrease) in Operating Assets [Abstract] Changes in operating assets and liabilities: 9/21/2026 Foreign Exchange Contract Settlement Date September Twenty One Two Thousand Twenty Six One [Member] Foreign Exchange Contract Settlement Date September Twenty One Two Thousand Twenty Six One. Foreign Exchange Contract Two Member Foreign Exchange Contract Two. Foreign Currency Contracts (SEK)[Member] Derivative Asset Derivative Asset, Total Fair Value Accrued performance allocation Accrued Bonuses, Current Accrued performance allocation Investment Company, Expense Ratio, after Fee Waiver and before Incentive Fee Deduction Operating expenses before expenses reimbursed by Manager (as a percent) Operating expenses before expenses reimbursed by Manager (as a percent) Deferred Offering Costs Amotization Deferred offering costs amotization. Deferred offering costs amortization Increase (Decrease) in Deferred Liabilities Increase (Decrease) in Deferred Liabilities, Total Increase/(decrease) in deferred offering costs Increase/(decrease) in deferred offering costs Subsequent Event Type [Axis] Equity [Abstract] Product and Service [Domain] Class A-D Shares [Member] Class A-D shares member. Financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Expenses Subject To Recoupment Expenses subject to recoupment. Expenses subject to recoupment Liabilities [Abstract] Liabilities Entity Tax Identification Number 12/21/2026 Foreign Exchange Contract Settlement Date December Twenty One Two Thousand Twenty Six Two [Member] Foreign Exchange Contract Settlement Date December Twenty One Two Thousand Twenty Six Two. Valuation Approach and Technique [Axis] Derivative Instrument [Axis] Equity Component [Domain] Entity Address, City or Town Arctura [Member] Arctura. Measurement Input Type [Domain] Common Class E Shares [Member] Common Class E shares. Stock Issued During Period, Value, New Issues Consideration from the issuance of shares Aggrgate amount, issued Class D Shares Class S Shares Class A-D Shares and Class A-S Shares [Member] Class d shares class s shares class a-d shares and class a-s shares member. Class D Shares, Class S Shares, Class A-D Shares and Class A-S Shares Fair Value Investments, Fair Value Disclosure Investments, Fair Value Disclosure, Total Gross management fee Gross Management Fee Gross Management Fee Valuation Technique, Discounted Cash Flow [Member] Discounted Cashflows Entity Common Stock, Shares Outstanding Performance Allocation, Total Return Percentage [Member] Performance Allocation, Total Return Percentage. Performance Allocation, Total Return Percentage Shareholder Servicing Fees Paid Shareholder servicing fees paid Shareholder servicing fees, paid Increase (Decrease) in Offering Costs Payable Increase (decrease) in offering costs payable. Increase in offering costs payable Increase in offering costs payable Segment Reporting, Expense Information Used by CODM, Description Segment reporting, expense information used by CODM, description Common Class I Shares [Member] Common Class I shares. EQT Holdings AB [Member] Financial [Member] Financial Industry Sector [Domain] Common Class S Shares [Member] Common Class S shares. Portfolio Companies Transportation And Logistics [Member] Portfolio Companies Transportation And Logistics. Portfolio Companies Transportation & Logistics [Member] Common Class M-I-TE USD Shares [Member] Common class M-I-TE USD shares. Statement [Table] EQT Investments AB ownership in EdgeConneX [Member] EQT Investments AB ownership in EdgeConneX. Affiliated Entity [Member] Transaction Costs waived Transaction Costs waived. Transaction costs waived Entity Shell Company Change in Unrealized (Appreciation) Depreciation on Foreign Currency Net Net change in unrealized (appreciation)/depreciation on foreign currency Net change in unrealized (appreciation)/depreciation on foreign currency Net change in unrealized (appreciation)/depreciation on foreign currency translation Accrued Shareholder Servicing Fee Accrued shareholder servicing fees Accrued shareholder servicing fees Market Comparables Valuation, Market Approach [Member] Statement [Line Items] Accrued Servicing Fees Payable Accounts Payable and Accrued Liabilities Accounts Payable and Accrued Liabilities, Total Maximum [Member] (Decrease) Increase in Organization Costs Payable (Decrease)/increase in organization costs payable. (Decrease)/increase in organization costs payable Derease in organization costs payable Increase (Decrease) in Interest Receivable Increase (decrease) in interest receivable. Increase in interest receivable Sale of Stock [Domain] Investment Owned, Cost Investments owned at cost Investments at fair value (cost: $170,456,652 and $0, respectively) Investment Income, Interest Interest income Money Market Funds At Fair Value Money market funds at fair value. Net Assets Disclosure [Text Block] Net Assets Disclosure. Net Assets Consolidation, Policy [Policy Text Block] Basis of Consolidation Subsequent Events [Abstract] Foreign Exchange Forward [Member] Foreign Currency Forward Contracts Investments, Debt and Equity Securities [Abstract] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Increase in legal and professional fees payable Increase (Decrease) in Legal and Professional Fees Payable Increase in legal and professional fees payable. Investment Company, Accrued shareholder servicing fees, Per Share Investment company, accrued shareholder servicing fees, per share. shareholder servicing fees Sale of Stock, Consideration Received on Transaction Sale of equity, aggregate consideration Aggregate Consideration Management fee waiver period Management fee waiver period. Related Party Transaction [Domain] Document Fiscal Year Focus Management fee payable period Management fee payable period Class I Shares, Class D Shares, Class S Shares and Class E Shares [Member] Class I Shares, Class D Shares, Class S Shares and Class E Shares. Class I Shares, Class D Shares, Class S Shares and Class E Shares Common Stock, Shares, Outstanding Common stock, shares, outstanding Shares outstanding Total amount of expenses to be reimbursed by related party. Total Amount Of Expenses To Be Reimbursed By Related Party Total amount of expenses to be reimbursed Net Change in Unrealized Appreciation/(Depreciation) Net Change in Unrealized Appreciation/(Depreciation) Net change in unrealized appreciation/(depreciation) Total net change in unrealized appreciation/(depreciation) Collaborative Arrangement and Arrangement Other than Collaborative [Table] Financial Instruments [Domain] Derivative Instruments at Fair Value Investment Owned, Foreign Currency Contract, Current Value Measurement Input, Revenue Multiple [Member] Weight Ascribed to Market Comparables Entity Ex Transition Period Investment Income [Table] Schedule of Net Assets [Table Text Block] Schedule of Net Assets [Table Text Block] Schedule of Net Assets Measurement Input Type [Axis] Related and Nonrelated Parties [Axis] Acquisition of Portfolio Companies Acquisition of portfolio companies. Acquisition of portfolio companies Entity Address, State or Province EdgeConneX [Member] EdgeConneX. Percentage of Performance Allocation of Total Return Attributable to Investor Shares Percentage of performance allocation of total return attributable to investor shares. PercentageOfPerformanceAllocationOfTotalReturnAttributableToInvestorShares Percentage of performance allocation of total return attributable to investor shares Disclosure Text Block [Abstract] Amendment Flag Related Party Transaction, Rate Related party transaction rate Basis of presentation. Basis of Presentation [Text Block] Basis of Presentation Reclassification [Line Items] Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation, Total Cash and cash equivalents and foreign currencies at fair value, end of period Cash and cash equivalents and foreign currencies at fair value, beginning of period City Area Code Duck Creek Solar [Member] Duck creek solar. Summary of Fair Value Measurements of Investments, By Major Class within Fair Value Hierarchy Fair Value, Assets Measured on Recurring Basis [Table Text Block] Unfunded Commitments Unfunded commitments. Unfunded commitments Proceeds from issuance of shares Proceeds from Issuance of Common Stock Measurement Input, Cap Rate [Member] Weighted Average Cost of Capital Non-cash Shares Issued in Exchange for Investment Acquisitions Non-cash Shares Issued in Exchange for Investment Acquisitions Class E Shares issued in exchange for investment acquisitions Investment, Identifier [Axis] Schedule of Investments [Table] Operating Expenses [Abstract] Operating expenses Class S Shares [Member] Class S shares member. Investment Company, Expense Ratio after Incentive Allocation Performance Allocation (as a percent) Foreign Currency Contracts (GBP) [Member] ForeignExchangeContract One Member Foreign exchange contract one. Segment Reporting [Text Block] Segment Reporting Derivative Instruments and Hedging Activities Disclosure [Abstract] Unrealized Gain (Loss), Foreign Currency Transaction, before Tax Net change in unrealized appreciation/(depreciation) on foreign currency translation Unrealised Appreciation/(Depreciation) Realized Gain (Loss), Foreign Currency Transaction, before Tax Net realized (gain)/loss on foreign currency transactions Foreign currency transactions Geographical [Axis] Amortization of Debt Issuance Costs and Discounts Amortization of Debt Issuance Costs and Discounts, Total Amortization of deferred offering costs Fair Value Measurement, Policy [Policy Text Block] Valuation of Investments at Fair Value Settlement Date Derivative, Contract End Date Subsequent Event [Table] Entity Emerging Growth Company Increase in other receivable Increase (Decrease) in Other Receivable Increase (decrease) in other receivable. Technology [Member] Technology. Net Change in Unrealized Appreciation Depreciation on Foreign Currency Forward Contracts Net change in unrealized appreciation depreciation on foreign currency forward contracts. Net change in unrealized (appreciation)/depreciation on foreign currency forward contracts Total money market funds, cost Cash Equivalent, Money Market Fund, Carrying Value Americold [Member] Americold. Europe [Member] Revenue Recognition Revenue Recognition Accounting Policy, Gross and Net Revenue Disclosure [Policy Text Block] Investment Owned At Cost And Money Market Funds Carrying Value Investment owned at cost and money market funds carrying value. Total investments and money market funds, cost Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Supplemental disclosure of non-cash financing activities Cover [Abstract] Director fees and expenses payable. Director Fees And Expenses Payable Directors' fees and expenses payable Proceeds From Portfolio Companies Proceeds from portfolio companies. Proceeds from portfolio companies Proceeds from portfolio companies Foreign Exchange Contract Settlement Date June Twenty One Two Thousand Twenty Seven One [Member] Foreign Exchange Contract Settlement Date June Twenty One Two Thousand Twenty Seven One. 6/21/2027 Stockholders' Equity, Period Increase (Decrease) Stockholders' Equity, Period Increase (Decrease), Total Net increase/(decrease) in net assets attributed to shareholders Investment Income, Net [Abstract] Investment income Legal and professional fees Professional Fees Reclassified Out of Organizational Costs and Into Deferred Offering Costs [Member] Reclassified Out of Organizational Costs and Into Deferred Offering Costs [Member] Reclassified out of organizational costs and into deferred offering costs. Operating expenses reimbursed by Manager (as a percent) Investment Company, Operating Expenses Reimbursed by Manager Investment company, operating expenses reimbursed by manager. Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Adjustments to reconcile net increase in net assets from operations to net cash used in operating activities: Fair Value Disclosures [Abstract] Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Increase in management fee payable, net Increase (Decrease) in Management Fee Payable Financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Net cash provided by financing activities Schedule of Related Party Transactions [Table Text Block] Schedule of Subject to Recoupment Pursuant to the Expense Limitation Agreement Investment Company, Financial Highlights [Table] Entity Filer Category Investment Company, Financial Highlights [Abstract] Investment Company, Operating Expenses After Expenses Reimbursed by Manager Investment company, operating expenses after expenses reimbursed by manager. Operating expenses after expenses reimbursed by Manager (as a percent) Distributions Distributions [Text Block] Distributions. Investment Owned, Fair Value, Ending Balance Investment Owned, Fair Value, Beginning Balance Investments at fair value Estimated Fair Value Investments, at fair value (cost: $767,798 and $0, respectively) Common Class Q [Member] Common Class Q Member Common Class Q Shares [Member] Measurement Input, EBITDA Multiple [Member] Enterprise Value / EBITDA Multiple Shares Outstanding, Ending Balance Shares Outstanding, Beginning Balance Shares outstanding at end of period Shares outstanding Document Information [Line Items] Segment Reporting [Abstract] Entity Address, Postal Zip Code Statement of Financial Position [Abstract] Local Phone Number