Summary of Significant Accounting Policies
Significant Accounting Policies [Text Block]
Derivative Liability, Estimated Fair Value as a Percentage of Net Liabilities
Derivative, Net Liabilities, Percentage
Derivative, Net Liabilities, Percentage
Statistical Measurement [Domain]
Statistical Measurement [Domain]
KKR Alternative Assets LLC
KKR Alternative Assets LLC [Member]
KKR Alternative Assets LLC
Award Timing Predetermined
Award Timing Predetermined [Flag]
Related Party Transaction [Axis]
Related Party Transaction [Axis]
Asset Class [Axis]
Asset Class [Axis]
Entity File Number
Entity File Number
SGD
Singapore, Dollars
Excess Profits
Performance Participation Allocation, Excess Profits Percentage [Member]
Performance Participation Allocation, Excess Profits Percentage
Valuation Approach and Technique [Domain]
Valuation Approach and Technique [Domain]
Payment of deferred financing costs
Payments of financing costs
Payments of Financing Costs
Tabular List, Table
Tabular List [Table Text Block]
Net realized gain (loss) and change in unrealized appreciation (depreciation) (in dollars per share)
Investment Company, Gain (Loss) on Investment, Per Share
Schedule of Distributions Declared
Dividends Declared [Table Text Block]
Future application of accounting standards
New Accounting Pronouncements, Policy [Policy Text Block]
Industrial Infrastructure
Industrial Infrastructure [Member]
Industrial Infrastructure
SOFR
Secured Overnight Financing Rate (SOFR) [Member]
Schedule of Fair Value Measurements of Investments, by Major Class
Fair Value, by Balance Sheet Grouping [Table Text Block]
Trading Arrangements, by Individual
Trading Arrangements, by Individual [Table]
Adjustment to Compensation:
Adjustment to Compensation [Axis]
Related Party Transactions
Related Party Transactions Disclosure [Text Block]
Named Executive Officers, Footnote
Named Executive Officers, Footnote [Text Block]
Other Infrastructure
Other Infrastructure [Member]
Other Infrastructure
Stock, Class of Stock [Table]
Stock, Class of Stock [Table]
Investment Company, Nonconsolidated Subsidiary [Axis]
Investment Company, Nonconsolidated Subsidiary [Axis]
Measurement Input Type [Domain]
Measurement Input Type [Domain]
Total net realized gain (loss)
Net realized gain (loss)
Realized Gain (Loss), Investment, Derivative, and Foreign Currency Transaction, Operating, after Tax
Adjustment to Compensation, Amount
Adjustment to Compensation Amount
Affiliated Entity
Affiliated Entity [Member]
Accrued shareholder servicing fees and distribution fees
Accrued Shareholder Servicing Fees and Distribution Fees, Equity Impact
Accrued Shareholder Servicing Fees and Distribution Fees, Equity Impact
Basis of Consolidation
Consolidation, Policy [Policy Text Block]
Change in subscriptions receivable
Change In Subscriptions Receivable
Change In Subscriptions Receivable
Assets, Notional
Derivative Asset, Notional Amount
Employee Stock Option
Share-Based Payment Arrangement, Option [Member]
Award Timing MNPI Disclosure
Award Timing MNPI Disclosure [Text Block]
General and administration expenses
Other General and Administrative Expense
Performance Participation Allocation (as a percent)
Investment Company, Incentive Fee to Average Net Assets
Unfunded Commitment Related to Investment in Infrastructure Assets
Unfunded Commitment Related To Investment In Infrastructure Assets [Member]
Unfunded Commitment Related To Investment In Infrastructure Assets
Insider Trading Policies and Procedures [Line Items]
Shares authorized (in shares)
Common Stock, Shares Authorized
Net increase (decrease) in net assets resulting from operations (in dollars per share)
Investment Company, Investment Income (Loss) from Operations, Per Share
Shares Issued During the Period (in shares)
Number of Shares Sold (in shares)
Stock Issued During Period, Shares, New Issues
Due to Manager and affiliates
Accounts Payable, Other
Cover [Abstract]
Investments in Money Market Funds
Investments in Money Market Funds
Cash and Cash Equivalents, Fair Value Disclosure
Maximum
Maximum [Member]
Net income (loss) attributable to non-controlling interests
Net Income (Loss) Attributable to Noncontrolling Interest
Accounting Policies [Abstract]
Net increase (decrease) in net assets resulting from operations
Investment Company, Net Assets From Investment Operations, Increase (Decrease)
Investment Company, Net Assets From Investment Operations, Increase (Decrease)
Non-PEO NEO Average Total Compensation Amount
Non-PEO NEO Average Total Compensation Amount
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Accrued performance participation allocation
Incentive Fee Payable
Investment, Identifier [Axis]
Investment, Identifier [Axis]
Cash and cash equivalents
Cash and Cash Equivalent, Not Held in Foreign Currency
Adjustment to Non-PEO NEO Compensation Footnote
Adjustment to Non-PEO NEO Compensation Footnote [Text Block]
Pay vs Performance Disclosure [Line Items]
Investments at fair value (cost of $5,279,464 and $4,649,579, respectively)
Infrastructure Assets
Infrastructure Assets
Investment Owned, Fair Value
Forgone Recovery due to Disqualification of Tax Benefits, Amount
Forgone Recovery due to Disqualification of Tax Benefits, Amount
Number of shares issued for services (in shares)
Stock Issued During Period, Shares, Issued for Services
Liabilities
Liabilities [Abstract]
Dividends receivable
Dividends Receivable
Non-Rule 10b5-1 Arrangement Terminated
Non-Rule 10b5-1 Arrangement Terminated [Flag]
Entity Shell Company
Entity Shell Company
Schedule of Long-Term Debt Instruments [Table]
Schedule of Long-Term Debt Instruments [Table]
Management fee expense
Management Fee Expense, Gross
Management Fee Expense, Gross
Infrastructure Assets [Roll Forward]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Statement of Stockholders' Equity [Abstract]
Statement of Cash Flows [Abstract]
Company Selected Measure Amount
Company Selected Measure Amount
Award Timing MNPI Considered
Award Timing MNPI Considered [Flag]
Interest expense
Interest Expense, Operating
Debt issuance costs
Debt Issuance Costs, Gross
Measurement Input Type [Axis]
Measurement Input Type [Axis]
Name
Measure Name
Due from Manager and affiliates
Other Receivables
Management fee expense
Management Fee Expense
Class of Stock [Line Items]
Class of Stock [Line Items]
Industry Sector [Domain]
Industry Sector [Domain]
Deferred tax liabilities
Deferred Income Tax Liabilities, Net
Document Fiscal Period Focus
Document Fiscal Period Focus
Award Timing Method
Award Timing Method [Text Block]
Award Type
Award Type [Axis]
Total Investments and Cash Equivalents, Estimated Fair Value as a Percentage of Net Assets
Net Investments And Cash Equivalents, Net Assets, Percentage
Net Investments And Cash Equivalents, Net Assets, Percentage
Outstanding balance
Long-Term Debt
Total assets
Assets
KRW
Korea (South), Won
Geographical [Domain]
Geographical [Domain]
Other accrued expenses and liabilities
Accrued Liabilities and Other Liabilities
Entity Address, City
Entity Address, City or Town
Operating activities
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Effect of exchange rate changes on cash and cash equivalents and foreign currencies at fair value
Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation
Non-PEO NEO Average Compensation Actually Paid Amount
Non-PEO NEO Average Compensation Actually Paid Amount
Compensation Actually Paid vs. Other Measure
Compensation Actually Paid vs. Other Measure [Text Block]
Catch-Up Rate
Performance Participation Allocation, Catch-Up Percentage [Member]
Performance Participation Allocation, Catch-Up Percentage
Early repurchase fee
Stock Issued During Period, Value, Early Repurchase Fee
Stock Issued During Period, Value, Early Repurchase Fee
Entity Emerging Growth Company
Entity Emerging Growth Company
Aggregate gross distributions declared per share (in dollars per share)
Common Stock, Dividends, Per Share, Declared
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Changes in operating assets and liabilities:
Increase (Decrease) in Operating Assets [Abstract]
Renewables
Renewables [Member]
Renewables
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]
Investment Company, Nonconsolidated Subsidiary [Line Items]
Investment Company, Nonconsolidated Subsidiary [Line Items]
Level II
Fair Value, Inputs, Level 2 [Member]
Deferred financing costs, net
Debt Issuance Costs, Net
Insider Trading Policies and Procedures Not Adopted
Insider Trading Policies and Procedures Not Adopted [Text Block]
Shares outstanding (in shares)
Shares Outstanding as of Beginning of Period (in shares)
Shares Outstanding as of End of Period (in shares)
Weighted average shares outstanding at end of period (in shares)
Common Stock, Shares, Outstanding
Net change in unrealized depreciation on foreign currency translation
Fair Value, Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset, Translation Adjustment Gain (Loss)
Fair Value, Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset, Translation Adjustment Gain (Loss)
Management fees and certain operating expenses
Management Fee And Operating Expense Credits
Management Fee And Operating Expense Credits
Document Information [Table]
Document Information [Table]
PEO
PEO [Member]
Asset transferred into Level 3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3
Foreign currency
Unrealized Gain (Loss), Foreign Currency Transaction, before Tax
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]
Upsize Agreement
Upsize Agreement [Member]
Upsize Agreement
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Performance Participation Allocation, Percentage of Cumulative Cash Proceeds
Performance Participation Allocation, Percentage Of Cumulative Cash Proceeds [Member]
Performance Participation Allocation, Percentage Of Cumulative Cash Proceeds
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
Restatement Determination Date
Restatement Determination Date
Cash and cash equivalents and foreign currencies at fair value, beginning of period
Cash and cash equivalents and foreign currencies at fair value, end of period
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation
Income Statement [Abstract]
Enterprise Value / LTM EBITDA Exit Multiple
Measurement Input, Enterprise Value/LTM EBITDA Exit Multiple [Member]
Measurement Input, Enterprise Value/LTM EBITDA Exit Multiple
Income tax expense (benefit)
Income Tax Expense (Benefit)
Unrealized appreciation on foreign currency forward contracts
Derivative Asset
Assets, Fair value
Derivative Asset
Debt instrument, basis spread on variable rate
Debt Instrument, Basis Spread on Variable Rate
Balance as of beginning of period
Balance as of end of period
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value
Expense related to distribution and servicing fees
Expense Related to Distribution or Servicing and Underwriting Fees
Document Information [Line Items]
Document Information [Line Items]
Acquisition of Infrastructure Assets
Payment for purchase, investment, operating activity
Payment for Purchase, Investment, Operating Activity
Pension Adjustments Service Cost
Pension Adjustments Service Cost [Member]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Total GAAP return attributed to Shares based on net asset value (as a percent)
Investment Company, Total Return
Fourth Joinder
Fourth Joinder [Member]
Fourth Joinder
Consolidated net income (loss)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Restatement does not require Recovery
Restatement Does Not Require Recovery [Text Block]
Share repurchase period
Share Repurchase Program, Period in Force
Net increase (decrease) in net assets resulting from capital activity (in dollars per share)
Investment Company, Capital Share Transaction, Per Share
Investment Company, Capital Share Transaction, Per Share
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Derivative, Notional Amount
Derivative, Notional Amount
Credit Agreement
Credit Agreement [Member]
Credit Agreement
Foreign currency translation
Net change in unrealized (appreciation) depreciation on foreign currency translation
Unrealized Gain (Loss), Foreign Currency Translation
Unrealized Gain (Loss), Foreign Currency Translation
Compensation Actually Paid vs. Company Selected Measure
Compensation Actually Paid vs. Company Selected Measure [Text Block]
Agreement term (in years)
Related Party Transaction, Term
Related Party Transaction, Term
City Area Code
City Area Code
Award Timing, How MNPI Considered
Award Timing, How MNPI Considered [Text Block]
All Trading Arrangements
All Trading Arrangements [Member]
Equity Awards Adjustments, Footnote
Equity Awards Adjustments, Footnote [Text Block]
Total Shareholder Return Vs Peer Group
Total Shareholder Return Vs Peer Group [Text Block]
Commitments and Contingencies Disclosure [Abstract]
Net operating expenses
Investment Company, Expense, after Reduction of Fee Waiver and Reimbursement
Pay vs Performance Disclosure
Pay vs Performance Disclosure [Table]
Net cash used in operating activities
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation
Related Party Transactions [Abstract]
Performance participation allocation
Incentive Fee Expense
Proceeds from sales and repayments
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales
Subsequent Event
Subsequent Event [Member]
Share repurchase limitation, maximum percentage (as a percent)
Share Repurchase Limitation, Maximum Percentage
Share Repurchase Limitation, Maximum Percentage
Equity Valuation Assumption Difference, Footnote
Equity Valuation Assumption Difference, Footnote [Text Block]
PEO Total Compensation Amount
PEO Total Compensation Amount
Long-Term Debt, Type [Axis]
Long-Term Debt, Type [Axis]
Money Market Funds
Money Market Funds [Member]
Operating expenses after expenses reimbursed and/or recouped by Manager (as a percent)
Investment Company, Expense Ratio, After Fee Waiver And Reimbursed And Or Recouped Expenses And Before Incentive Fee Deduction
Investment Company, Expense Ratio, After Fee Waiver And Reimbursed And Or Recouped Expenses And Before Incentive Fee Deduction
Class S, Class R-S And Class U Shares
Class S, Class R-S And Class U Shares [Member]
Class S, Class R-S And Class U Shares
Management Fee Rate Attributable to Class D, I and S Shares
Management Fee Percentage Attributable To Class D, I and S Shares [Member]
Management Fee Percentage Attributable To Class D, I and S Shares
Non-Rule 10b5-1 Arrangement Adopted
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Class U Shares
Class U Shares
Class U Shares [Member]
Class U Shares
Number of reportable segments
Number of Reportable Segments
Schedule of Financial Highlights
Investment Company, Financial Highlights [Table Text Block]
Transactional Net Asset Value Per Share (in dollars per share)
Transactional Net Asset Value Per Share
Transactional Net Asset Value Per Share
Supplemental disclosure of cash flow information
Supplemental Cash Flow Information [Abstract]
Reinvestment of distributions (in dollars per shares)
Investment Company, Dividend Reinvestment Plan, Per share
Investment Company, Dividend Reinvestment Plan, Per share
Class S, Class D, Class U, Class I, Class R-S, Class R-D, Class R or Class F Shares
Class S, Class D, Class U, Class I, Class R-S, Class R-D, Class R And Class F Shares [Member]
Class S, Class D, Class U, Class I, Class R-S, Class R-D, Class R And Class F Shares
Other Performance Measure, Amount
Other Performance Measure, Amount
Entity Address, State
Entity Address, State or Province
Net investment income (loss) (as a percent)
Investment Company, Investment Income (Loss) Ratio
EUR
Euro Member Countries, Euro
Class H Shares
Class H Shares
Class H Shares [Member]
Class H Shares
Related Party [Domain]
Related and Nonrelated Parties [Domain]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Investment Company, Net Assets [Roll Forward]
Derivative Instrument [Axis]
Derivative Instrument [Axis]
Class D Shares
Class D Shares [Member]
Class D Shares
Individual:
Individual [Axis]
Class E Shares
Class E Shares
Class E Shares [Member]
Class E Shares
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]
Cash paid for interest
Interest Paid, Excluding Capitalized Interest, Operating Activity
Distribution Fee
Distribution Fee [Member]
Distribution Fee
Document Fiscal Year Focus
Document Fiscal Year Focus
Basis of Presentation
Basis of Accounting, Policy [Policy Text Block]
Forgone Recovery, Explanation of Impracticability
Forgone Recovery, Explanation of Impracticability [Text Block]
Effective tax rate
Effective Income Tax Rate Reconciliation, Percent
Entity Interactive Data Current
Entity Interactive Data Current
Class I Shares
Class I Shares [Member]
Class I Shares
Performance Participation Allocation, Percentage of Remaining Excess Profits
Performance Participation Allocation, Percentage Of Remaining Excess Profits [Member]
Performance Participation Allocation, Percentage Of Remaining Excess Profits
Add: Expenses recouped by Manager
Recouped expenses
Expenses Recouped
Expenses Recouped
Equity [Abstract]
North America
North America [Member]
Distribution Fees and Servicing Fees
Distribution Fees And Servicing Fees [Member]
Distribution Fees And Servicing Fees
Segment Reporting
Segment Reporting Disclosure [Text Block]
Investments at cost
Investment Owned, Cost
Total net change in unrealized appreciation (depreciation) after income taxes
Net change in unrealized appreciation (depreciation)
Unrealized Gain (Loss), Investment, Derivative, and Foreign Currency Transaction, Operating, after Tax
Other Commitments [Line Items]
Other Commitments [Line Items]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Ratio/Supplemental data for Shares (not annualized):
Investment Company, Total Return [Abstract]
Compensation Actually Paid vs. Total Shareholder Return
Compensation Actually Paid vs. Total Shareholder Return [Text Block]
Operating expenses before expenses reimbursed and/or recouped by Manager (as a percent)
Investment Company, Expense Ratio, Before Reimbursed Expenses
Investment Company, Expense Ratio, Before Reimbursed Expenses
Weighted Average
Weighted Average [Member]
Management Fee Rate Attributable to Class U, R-D and R Shares Following Acceptance of Initial Subscription of Shares
Management Fee Percentage Attributable To Class U, R-D, R-S And R Shares Following Acceptance Of Initial Subscription Of Shares [Member]
Management Fee Percentage Attributable To Class U, R-D, R-S And R Shares Following Acceptance Of Initial Subscription Of Shares
Repurchases of shares
Gross Consideration
Gross Consideration
Stock Repurchased During Period, Value
Net Consideration
Stock Repurchase Program, Net Consideration
Stock Repurchase Program, Net Consideration
Net asset value per share at beginning of period (in dollars per share)
Net asset value per share at end of period (in dollars per share)
Net Asset Value Per Share
Entity Central Index Key
Entity Central Index Key
Management Fee Percentage Attributable To Class U, R-D. R-S And R Shares Thereafter
Management Fee Percentage Attributable To Class U, R-D. R-S And R Shares Thereafter [Member]
Management Fee Percentage Attributable To Class U, R-D. R-S And R Shares Thereafter
PEO Name
PEO Name
Revenues
Revenues
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]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Outstanding Aggregate Erroneous Compensation Amount
Outstanding Aggregate Erroneous Compensation Amount
Net change in unrealized (appreciation) depreciation on foreign currency
Unrealized Gain (Loss), Foreign Currency Transaction, after Tax
Arrangement Duration
Trading Arrangement Duration
Number of shares issued as payment of performance participation allocation (in shares)
Stock Issued During Period, Shares, Performance Participation Allocation
Stock Issued During Period, Shares, Performance Participation Allocation
Transfers out
Stock Issued During Period, Value,Transfers Out
Stock Issued During Period, Value,Transfers Out
(Increase) Decrease in prepaids and other assets
Increase (Decrease) in Prepaid Expense and Other Assets
Exercise Price
Award Exercise Price
Entity Filer Category
Entity Filer Category
Dividend and other income
Dividend Income, Operating
Local Phone Number
Local Phone Number
Class of Stock [Domain]
Class of Stock [Domain]
Additional 402(v) Disclosure
Additional 402(v) Disclosure [Text Block]
Federal statutory income tax rate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Europe
Europe [Member]
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Energy And Utilities
Energy And Utilities [Member]
Energy And Utilities
Assets
Assets [Abstract]
Consideration from the issuance of shares (in dollars per share)
Investment Company, Share Issuance, Per Share
Underlying Security Market Price Change
Underlying Security Market Price Change, Percent
Other Commitments [Axis]
Other Commitments [Axis]
Transfers out (in dollars per share)
Investment Company, Transfers Out, Per share
Investment Company, Transfers Out, Per share
Debt Instrument [Axis]
Debt Instrument [Axis]
Fair Value Measurements - Investments
Fair Value Disclosures [Text Block]
Foreign currency
Realized Gain (Loss), Foreign Currency Transaction, after Tax
Investments
Net change in unrealized (appreciation) depreciation on investments
Debt and Equity Securities, Unrealized Gain (Loss)
Weighted Average Cost of Capital
Measurement Input, Weighted Average Cost Of Capital [Member]
Measurement Input, Weighted Average Cost Of Capital
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]
Infrastructure Assets, Estimated Fair Value as a Percentage of Net Assets
Infrastructure assets, percentage
Investment Owned, Net Assets, Percentage
Entity Address, Address Line One
Entity Address, Address Line One
Transfers in
Stock Issued During Period, Value, Transfers In
Stock Issued During Period, Value, Transfers In
Increase (Decrease) in other accrued expenses and liabilities
Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities
Class F Shares issued as payment of performance participation allocation
Shares Issued As Payment Of Performance Participation Allocation
Shares Issued As Payment Of Performance Participation Allocation
Extension option period
Line Of Credit Facility, Extension Option, Period
Line Of Credit Facility, Extension Option, Period
Derivatives
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Industry Sector [Axis]
Industry Sector [Axis]
Schedule of Stock by Class
Schedule of Stock by Class [Table Text Block]
Management fee payable
Management Fee Payable
Investment Company [Abstract]
Class R-D Shares
Class R-D Shares
Class R- D Shares [Member]
Class R- D Shares
Financial Highlights
Investment Company, Financial Highlights [Text Block]
Fair Value as of Grant Date
Award Grant Date Fair Value
Entity Registrant Name
Entity Registrant Name
Investment Company, Financial Highlights [Line Items]
Investment Company, Financial Highlights [Line Items]
Stock Price or TSR Estimation Method
Stock Price or TSR Estimation Method [Text Block]
Repurchase Price per Share (in dollars per share)
Repurchases of shares (in dollars per share)
Repurchase Price per Share (in dollars per share)
Investment Company, Share Repurchase, Per Share
Related Party Transaction [Line Items]
Related Party Transaction [Line Items]
Directors' fees and expenses payable
Directors Fees And Expenses Payable
Directors Fees And Expenses Payable
Document Quarterly Report
Document Quarterly Report
Schedule of Fair Value Measurement Inputs and Valuation Techniques
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
Total net change in unrealized appreciation (depreciation) before income taxes
Unrealized Gain (Loss), Investment, Derivative And Foreign Currency Transaction, Operating, Before Tax
Unrealized Gain (Loss), Investment, Derivative And Foreign Currency Transaction, Operating, Before Tax
Changed Peer Group, Footnote
Changed Peer Group, Footnote [Text Block]
Expense Limitation and Reimbursement Agreement
Expense Limitation And Reimbursement Agreement [Member]
Expense Limitation And Reimbursement Agreement
Counterparty Name [Domain]
Counterparty Name [Domain]
Original Issuance Date
Original Issuance Date [Member]
Original Issuance Date
Number of operating segments
Number of Operating Segments
Minimum aggregate subscriptions required
Minimum Aggregate Subscriptions Required
Minimum Aggregate Subscriptions Required
Adjustment To PEO Compensation, Footnote
Adjustment To PEO Compensation, Footnote [Text Block]
Investments and cash equivalents, cost
Net Investments And Cash Equivalents, At Cost
Net Investments And Cash Equivalents, At Cost
Related and Nonrelated Parties [Axis]
Related and Nonrelated Parties [Axis]
Title
Trading Arrangement, Individual Title
Peer Group Total Shareholder Return Amount
Peer Group Total Shareholder Return Amount
Repayment of line of credit
Repayments of Long-Term Lines of Credit
Prepaids and other assets
Prepaid Expense and Other Assets
Restatement Determination Date:
Restatement Determination Date [Axis]
Non-PEO NEO
Non-PEO NEO [Member]
Beginning balance
Ending balance
Members' Equity
Liabilities, Notional
Derivative Liability, Notional Amount
All Currencies [Domain]
All Currencies [Domain]
Name
Trading Arrangement, Individual Name
Schedule of Repurchase Agreements
Schedule of Repurchase Agreements [Table Text Block]
All Award Types
Award Type [Domain]
Equity Awards Adjustments
Equity Awards Adjustments [Member]
Pension Benefits Adjustments, Footnote
Pension Benefits Adjustments, Footnote [Text Block]
Compensation Amount
Outstanding Recovery Compensation Amount
Local Rate
Local Rate [Member]
Local Rate
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
(Increase) Decrease in receivable for settlement of foreign currency forward contracts
(Increase) Decrease In Receivable For Settlement Of Foreign Currency Forward Contracts
(Increase) Decrease In Receivable For Settlement Of Foreign Currency Forward Contracts
Recovery of Erroneously Awarded Compensation Disclosure [Line Items]
Increase in borrowing capacity
Line of Credit Facility, Additional Maximum Borrowing Capacity
Line of Credit Facility, Additional Maximum Borrowing Capacity
Early repurchase fee (in dollars per share)
Investment Company, Early Repurchase Fee, Per Share
Investment Company, Early Repurchase Fee, Per Share
MNPI Disclosure Timed for Compensation Value
MNPI Disclosure Timed for Compensation Value [Flag]
Name
Awards Close in Time to MNPI Disclosures, Individual Name
Aggregate Erroneous Compensation Not Yet Determined
Aggregate Erroneous Compensation Not Yet Determined [Text Block]
Other commitment
Other Commitment
Total Investments and Cash Equivalents
Net Investments And Cash Equivalents, Fair Value
Net Investments And Cash Equivalents, Fair Value
Investment income
Revenues [Abstract]
Usage Equal to or Greater Than 50% of Aggregate Commitment
Line Of Credit Facility, Usage Equal To Or Greater Than 50% Of Aggregate Commitment [Member]
Line Of Credit Facility, Usage Equal To Or Greater Than 50% Of Aggregate Commitment
5% Early Repurchase Fee
Stock Repurchase Program, Early Repurchase Fee
Stock Repurchase Program, Early Repurchase Fee
Payment of shareholder servicing fees and distribution fees
Payment Of Shareholder Servicing Fees And Distribution Fees
Payment Of Shareholder Servicing Fees And Distribution Fees
Purchases
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases
Credit available to the borrowers
Line of Credit Facility, Remaining Borrowing Capacity
Aggregate Pension Adjustments Service Cost
Aggregate Pension Adjustments Service Cost [Member]
Fair Value Hierarchy and NAV [Domain]
Fair Value Hierarchy and NAV [Domain]
Increase in commitment with accordion feature
Line of Credit Facility, Accordion Feature, Higher Borrowing Capacity Option
Line of Credit Facility, Accordion Feature, Higher Borrowing Capacity Option
Minimum
Minimum [Member]
Class F Shares issued as payment of directors' fees and expenses
Shares Issued, Payment Of Directors' Fees And Expenses
Shares Issued, Payment Of Directors' Fees And Expenses
Company Selected Measure Name
Company Selected Measure Name
AUD
Australia, Dollars
Net change in unrealized appreciation on investments
Fair Value, Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) On Investments
Fair Value, Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) On Investments
Credit Facility
Debt Disclosure [Text Block]
Aggregate Available
Trading Arrangement, Securities Aggregate Available Amount
Second Joinder
Second Joinder [Member]
Second Joinder
Stock Appreciation Rights (SARs)
Stock Appreciation Rights (SARs) [Member]
Foreign currencies, cost
Cash and Cash Equivalent, Held in Foreign Currency, Acquisition Cost
All Executive Categories
All Executive Categories [Member]
Commitments and Contingencies
Commitments and Contingencies Disclosure [Text Block]
Commitments and contingencies (Note 10)
Commitments and Contingencies
Net increase (decrease) in net assets resulting from capital activity
Investment Company, Capital Share Transaction, Increase (Decrease)
Non-GAAP Measure Description
Non-GAAP Measure Description [Text Block]
Derivative [Table]
Derivative [Table]
Net Asset Value
Fair Value Measured at Net Asset Value Per Share [Member]
Credit Agreement Amendments
Credit Agreement Amendments [Member]
Credit Agreement Amendments
Stock issued during period, value, performance participation allocation
Stock Issued During Period, Value, Performance Participation Allocation
Stock Issued During Period, Value, Performance Participation Allocation
Enterprise Value / Forward EBITDA Multiple
Measurement Input, Enterprise Value/Forward EBITDA Multiple [Member]
Measurement Input, Enterprise Value/Forward EBITDA Multiple
Entity Small Business
Entity Small Business
Income Tax Disclosure [Abstract]
Investments, measurement input
Investment Company, Investment Owned, Measurement Input
Distributions payable
Distribution Payable
Document Transition Report
Document Transition Report
Other fees earned, unapplied credits
Unapplied Credits
Unapplied Credits
Underlying Securities
Award Underlying Securities Amount
Document Period End Date
Document Period End Date
PEO Actually Paid Compensation Amount
PEO Actually Paid Compensation Amount
Cash and Cash Equivalents [Domain]
Cash and Cash Equivalents [Domain]
Income Taxes
Income Tax Disclosure [Text Block]
UNITED KINGDOM
UNITED KINGDOM
Awards Close in Time to MNPI Disclosures, Table
Awards Close in Time to MNPI Disclosures [Table Text Block]
Sixth Joinder
Sixth Joinder [Member]
Sixth Joinder
Accrued shareholder servicing fees and distribution fees (in dollars per share)
Investment Company, Accrued Shareholder Servicing And Distribution Fees, Per Share
Investment Company, Accrued Shareholder Servicing And Distribution Fees, Per Share
Document Type
Document Type
Level III
Fair Value, Inputs, Level 3 [Member]
Name
Outstanding Recovery, Individual Name
Net change in unrealized appreciation (depreciation) before income taxes on
Unrealized Gain (Loss), Investment, Foreign Currency And Derivative, Operating, Before Tax [Abstract]
Unrealized Gain (Loss), Investment, Foreign Currency And Derivative, Operating, Before Tax
Line Of Credit Facility, Commitment Fee [Axis]
Line Of Credit Facility, Commitment Fee [Axis]
Line Of Credit Facility, Commitment Fee
Schedule of Transactional Net Asset Value By Class
Schedule of Transactional Net Asset Value By Class [Table Text Block]
Schedule of Transactional Net Asset Value By Class
Derivative Contract [Domain]
Derivative Contract [Domain]
Proceeds from issuance of shares
Proceeds from Issuance of Common Stock
All Individuals
All Individuals [Member]
Long-Term Debt, Type [Domain]
Long-Term Debt, Type [Domain]
KKR Capital Markets LLC
KKR Capital Markets LLC [Member]
KKR Capital Markets LLC
Fair Value Disclosures [Abstract]
Summarized Infrastructure Assets Financial Information
Investment Company, Nonconsolidated Subsidiary, Summarized Financial Information [Table Text Block]
Name
Forgone Recovery, Individual Name
Distributions declared (in dollars per share)
Investment Company, Distribution to Shareholders, Per Share
Foreign currency forward contracts
Net change in unrealized (appreciation) depreciation on foreign currency forward contracts
Unrealized Gain (Loss) on Derivatives
Statistical Measurement [Axis]
Statistical Measurement [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]
Investment Company, Nonconsolidated Subsidiary [Domain]
Investment Company, Nonconsolidated Subsidiary [Domain]
Unused capacity, commitment fee percentage
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage
Reference Rate
Reference Rate [Member]
Reference Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Aggregate Erroneous Compensation Amount
Aggregate Erroneous Compensation Amount
Transfers In (in shares)
Stock Issued During Period, Shares, Transfers In
Stock Issued During Period, Shares, Transfers In
Peer Group Issuers, Footnote
Peer Group Issuers, Footnote [Text Block]
Schedule of Derivative Instruments
Schedule of Derivative Instruments [Table Text Block]
Erroneous Compensation Analysis
Erroneous Compensation Analysis [Text Block]
Geographical [Axis]
Geographical [Axis]
Expenses
Operating Expenses
Social Infrastructure
Social Infrastructure [Member]
Social Infrastructure
Rule 10b5-1 Arrangement Terminated
Rule 10b5-1 Arrangement Terminated [Flag]
Schedule of Subsequent Events
Schedule of Subsequent Events [Table Text Block]
Level I
Fair Value, Inputs, Level 1 [Member]
Directors' fees and expenses
Director Fee
Related Party Transaction [Table]
Related Party Transaction [Table]
Asia-Pacific
Asia Pacific [Member]
Related party transaction rate (as a percent)
Related Party Transaction, Rate
Erroneously Awarded Compensation Recovery
Erroneously Awarded Compensation Recovery [Table]
Derivative Asset, Estimated Fair Value as a Percentage of Net Assets
Derivative, Net Assets, Percentage
Net change in unrealized appreciation (depreciation) on investments, foreign currency, foreign currency translation and foreign currency forward contracts
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Reinvestment of distributions
Stock Issued During Period, Value, Dividend Reinvestment Plan
Net investment income (loss)
Net investment income (loss)
Investment Income, Operating, after Expense and Tax
(Increase) Decrease in dividends receivable
Increase (Decrease) in Dividends Receivable
Total Return
Performance Participation Allocation, Total Return Percentage [Member]
Performance Participation Allocation, Total Return Percentage
Investment Company, Nonconsolidated Subsidiary [Table]
Investment Company, Nonconsolidated Subsidiary [Table]
Total Derivative Instruments
Derivative Asset (Liability), Net
Derivative Asset (Liability), Net
Change in shareholder servicing fees and distribution fees payable
Change In Shareholder Servicing Fees And Distribution Fees Payable
Change In Shareholder Servicing Fees And Distribution Fees Payable
Fifth Joinder
Fifth Joinder [Member]
Fifth Joinder
Net realized gain (loss) on investments, foreign currency and foreign currency forward contracts
Gain (Loss), Foreign Currency Transaction, after Tax [Abstract]
Accrued shareholder servicing fees and distribution fees
Accrued Shareholder Servicing Fees and Distribution Fees
Accrued Shareholder Servicing Fees and Distribution Fees
Foreign currencies at fair value (cost of $8,868 and $183, respectively)
Cash and Cash Equivalent, Held in Foreign Currency
Investment Company, Financial Highlights [Table]
Investment Company, Financial Highlights [Table]
Award Timing Disclosures [Line Items]
Weight Ascribed to Market Comparables
Measurement Input, Weight Ascribed To Market Comparables [Member]
Measurement Input, Weight Ascribed To Market Comparables
Foreign currency forward contracts
Realized Gain (Loss), Investment and Derivative, Operating, after Tax
Distributions declared
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Declared
Net Assets
Distributions
Equity [Text Block]
Remaining Excess Profits
Performance Participation Allocation, Remaining Excess Profits Percentage [Member]
Performance Participation Allocation, Remaining Excess Profits Percentage
Usage Less Than 50% of Aggregate Commitment
Line Of Credit Facility, Usage Less Than 50% Of Aggregate Commitment [Member]
Line Of Credit Facility, Usage Less Than 50% Of Aggregate Commitment
Net income (loss)
Net increase in net assets from operations
Net Income (Loss) Attributable to Parent
Subsequent Event [Table]
Subsequent Event [Table]
Expiration Date
Trading Arrangement Expiration Date
Other Commitments [Domain]
Other Commitments [Domain]
Net investment (loss) income (in dollars per share)
Investment Company, Investment Income (Loss), Per Share, Basic
Midstream Infrastructure
Midstream Infrastructure [Member]
Midstream Infrastructure
Transfers Out (in shares)
Stock Issued During Period, Shares, Transfers Out
Stock Issued During Period, Shares, Transfers Out
Infrastructure Assets
Investments [Member]
Repurchases of shares
Payments for Repurchase of Common Stock
Adoption Date
Trading Arrangement Adoption Date
INR
India, Rupees
Compensation Actually Paid vs. Net Income
Compensation Actually Paid vs. Net Income [Text Block]
Less: Management fee and expense credits
Management Fee And Expense Credits
Management Fee And Expense Credits
Entity Current Reporting Status
Entity Current Reporting Status
Derivative [Line Items]
Derivative [Line Items]
Awards Close in Time to MNPI Disclosures
Awards Close in Time to MNPI Disclosures [Table]
Reinvestment of distributions
Reinvestment Of Distributions
Reinvestment Of Distributions
Class F Shares issued as payment of Management fees
Shares Issued, Payment Of Management Fees
Shares Issued, Payment Of Management Fees
Class S Shares
Class S Shares [Member]
Class S Shares
Line of Credit
Line of Credit [Member]
Class D and R-D Shares
Class D And R-D Shares [Member]
Class D And R-D Shares
Total operating expenses (as a percent)
Investment Company, Expense Ratio, after Fee Waiver and Incentive Fee Deduction
Class R Shares
Class R Shares
Class R Shares [Member]
Class R Shares
Proceeds from return of capital on Infrastructure Assets
Proceeds From Return Of Capital On Investments
Proceeds From Return Of Capital On Investments
Statement of Financial Position [Abstract]
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]
Executive Category:
Executive Category [Axis]
First Joinder
First Joinder [Member]
First Joinder
Foreign currency forward contracts
Foreign Exchange Forward [Member]
CAD
Canada, Dollars
Class G Shares
Class G Shares
Class G Shares [Member]
Class G Shares
Market comparables
Valuation, Market Approach [Member]
Current Fiscal Year End Date
Current Fiscal Year End Date
Class of Stock [Axis]
Class of Stock [Axis]
Class F Shares
Class F Shares [Member]
Class F Shares
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Increase (Decrease) in due to Manager and affiliates
Increase (Decrease) in Due to Related Parties
Weight Ascribed to Transaction Price/Other
Measurement Input, Weight Ascribed To Transaction Price/Other [Member]
Measurement Input, Weight Ascribed To Transaction Price/Other
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]
Credit Agreement and Credit Agreement Amendment
Credit Agreement And Credit Agreement Amendment [Member]
Credit Agreement And Credit Agreement Amendment
Third Joinder
Third Joinder [Member]
Third Joinder
Professional fees
Professional Fees
Statement [Table]
Statement [Table]
Unrealized depreciation on foreign currency forward contracts
Derivative Liability
Unrealized depreciation on foreign currency forward contracts
Liabilities, Fair value
Derivative Liability
Adjustments to reconcile net increase in net assets from operations to net cash used in operating activities:
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract]
Financing activities
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]
Equity Awards Adjustments, Excluding Value Reported in Compensation Table
Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member]
Transfers in (in dollars per share)
Investment Company, Transfers In, Per share
Investment Company, Transfers In, Per share
Line Of Credit Facility, Commitment Fee [Domain]
Line Of Credit Facility, Commitment Fee [Domain]
Line Of Credit Facility, Commitment Fee [Domain]
Variable Rate [Domain]
Variable Rate [Domain]
Organization
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
Schedule of Reconciliation of Infrastructure Assets, Level III Inputs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
Increase (Decrease) in management fee payable
Increase (Decrease) in Management Fee Payable
Investments in Money Market Funds, Estimated Fair Value as a Percentage of Net Assets
Cash And Cash Equivalents, Net Assets, Percentage
Cash And Cash Equivalents, Net Assets, Percentage
All Adjustments to Compensation
All Adjustments to Compensation [Member]
Fair Value, by Balance Sheet Grouping [Table]
Fair Value, by Balance Sheet Grouping [Table]
Amendment Flag
Amendment Flag
Income before taxes
Income (Loss) Attributable to Parent, before Tax
Other Commitments [Table]
Other Commitments [Table]
Provision for (benefit from) income taxes
Unrealized Gain (Loss), Investment and Derivative, Operating, Tax Expense (Benefit)
Termination Date
Trading Arrangement Termination Date
Net cash provided by financing activities
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation
Insider Trading Policies and Procedures Adopted
Insider Trading Policies and Procedures Adopted [Flag]
Measure:
Measure [Axis]
Net realized gain (loss) on
Net Realized Gain (Loss) On Investment, Derivative And Foreign Currency Transaction [Abstract]
Net Realized Gain (Loss) On Investment, Derivative And Foreign Currency Transaction
Net assets (Note 7)
Net Assets
Valuation Approach and Technique [Axis]
Valuation Approach and Technique [Axis]
Waste
Waste [Member]
Waste
(Increase) Decrease in due from Manager and affiliates
Increase (Decrease) in Due from Related Parties
Minimum aggregate subscription, purchase period (in months)
Minimum Aggregate Subscription, Purchase Period
Minimum Aggregate Subscription, Purchase Period
Telecom Towers
Telecom Towers [Member]
Telecom Towers
Initial offering period (in months)
Initial Subscription Offering, Period
Initial Subscription Offering, Period
Related Party Transaction [Domain]
Related Party Transaction [Domain]
Subsequent Events [Abstract]
Segment Reporting [Abstract]
Pay vs Performance Disclosure, Table
Pay vs Performance [Table Text Block]
Debt Disclosure [Abstract]
Forgone Recovery due to Violation of Home Country Law, Amount
Forgone Recovery due to Violation of Home Country Law, Amount
Deferred financing costs amortization
Amortization of Debt Issuance Costs
Total operating expenses
Investment Income, Investment Expense
Entity Tax Identification Number
Entity Tax Identification Number
Discounted cash flow
Valuation Technique, Discounted Cash Flow [Member]
GBP
United Kingdom, Pounds
Operating expenses before Performance Participation Allocation (as a percent)
Investment Company, Expense Ratio, after Fee Waiver and before Incentive Fee Deduction
Forgone Recovery due to Expense of Enforcement, Amount
Forgone Recovery due to Expense of Enforcement, Amount
Shares issued (in shares)
Common Stock, Shares, Issued
Data Centers
Data Centers [Member]
Data Centers
Weight Ascribed to Discounted Cash Flow
Measurement Input, Weight Ascribed To Discounted Cash Flow [Member]
Measurement Input, Weight Ascribed To Discounted Cash Flow
Change in deferred financing costs payable
Change In Deferred Financing Costs Payable
Change In Deferred Financing Costs Payable
Distributions
Payments of Dividends
Trading Arrangement:
Trading Arrangement [Axis]
Total Shareholder Return Amount
Total Shareholder Return Amount
Transportation
Transportation [Member]
Transportation
Servicing Fee
Shareholder Servicing Fee [Member]
Shareholder Servicing Fee
Subsequent Events
Subsequent Events [Text Block]
Insider Trading Arrangements [Line Items]
Total liabilities
Liabilities
Currency [Axis]
Currency [Axis]
Cash and Cash Equivalents [Axis]
Cash and Cash Equivalents [Axis]
Commitment fee percentage
Line of Credit Facility, Commitment Fee Percentage
Aggregate principal amount
Line of Credit Facility, Maximum Borrowing Capacity
Shares Issued Upon Reinvestment of Distributions During the Period (in shares)
Shares issued during the period pursuant to DRIP (in shares)
Stock Issued During Period, Shares, Dividend Reinvestment Plan
Pension Adjustments Prior Service Cost
Pension Adjustments Prior Service Cost [Member]
Shares Repurchased During the Period (in shares)
Number of Shares Repurchased (in shares)
Number of Shares Repurchased (in shares)
Stock Repurchased During Period, Shares
Investments
Investment Holdings [Text Block]
Fiber
Fiber [Member]
Fiber
Operating expenses
Operating Expenses [Abstract]
Material Terms of Trading Arrangement
Material Terms of Trading Arrangement [Text Block]
Asset Class [Domain]
Asset Class [Domain]
Increase (Decrease) in accrued performance participation allocation
Increase (Decrease) in Incentive Fee Payable
Investment Company, Nonconsolidated Subsidiaries
Investment Company, Nonconsolidated Subsidiaries [Member]
Investment Company, Nonconsolidated Subsidiaries
Consideration from the issuance of shares
Consideration
Stock Issued During Period, Value, New Issues
Statement [Line Items]
Statement [Line Items]
Variable Rate [Axis]
Variable Rate [Axis]
Rule 10b5-1 Arrangement Adopted
Rule 10b5-1 Arrangement Adopted [Flag]
Investments in money market funds, cost
Cash and Cash Equivalent
Fair Value Measurement Inputs and Valuation Techniques [Table]
Fair Value Measurement Inputs and Valuation Techniques [Table]
Counterparty Name [Axis]
Counterparty Name [Axis]
Subsequent Event [Line Items]
Subsequent Event [Line Items]
Total investment income
Gross Investment Income, Operating
Increase (Decrease) in deferred tax liabilities
Increase (Decrease) in Deferred Income Taxes
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
Non-NEOs
Non-NEOs [Member]
Net increase in cash and cash equivalents and foreign currencies at fair value
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation