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Liability, Subject to Master Netting Arrangement, Asset Offset AA, Carlyle US CLO 2026-3, Ltd, Tranche B AA, Carlyle US CLO 2026-3, Ltd, Tranche B [Member] AA, Carlyle US CLO 2026-3, Ltd, Tranche B Number of financial institutions Number Of Financial Institutions Number Of Financial Institutions Common stock, $0.01 par value; 198,000,000 shares authorized; 69,160,814 and 71,807,190 shares issued and outstanding at June 30, 2026 and December 31, 2025, respectively Common Stock, Value, Issued Cash acquired in Credit Fund II Purchase Proceeds From Cash Acquired In Credit Fund Purchase, Operating Activities Proceeds From Cash Acquired In Credit Fund Purchase, Operating Activities Schedule of Long-Term Debt Instruments Schedule of Long-Term Debt Instruments [Table Text Block] O 2022 M12 Dividends O 2022 M12 Dividends [Member] O 2022 M12 Dividends Amortization (accretion) of purchase price premium Asset Acquisition, Amortization (Accretion) of Purchase Price Premium Asset Acquisition, Amortization (Accretion) of Purchase Price Premium Line of Credit Line of Credit [Member] Restatement Determination Date Restatement Determination Date 2019 Notes 2019 Senior Unsecured Notes [Member] 2019 Senior Unsecured Notes Consumer Services Consumer Services [Member] Consumer Services Non-controlled/non-affiliated Investment, Unaffiliated Issuer [Member] Amendment Flag Amendment Flag O 2024 M12 Dividends O 2024 M12 Dividends [Member] O 2024 M12 Dividends Net investment income (loss) before taxes Net Investment Income O 2026 M3 Dividends O 2026 M3 Dividends [Member] O 2026 M3 Dividends 2015-1R Notes 2015-1R Notes [Member] 2015-1R Notes Credit Fund Facility Credit Fund Facility [Member] Credit Fund Facility Forest Products & Paper Forest Products And Paper Sector [Member] Forest Products And Paper Sector BB, Carlyle US CLO 2026-3, Ltd, Tranche E BB, Carlyle US CLO 2026-3, Ltd, Tranche E [Member] BB, Carlyle US CLO 2026-3, Ltd, Tranche E Investments [Domain] Investments [Domain] Consumer Goods: Non-Durable Consumer Goods, Non-Durable [Member] Consumer Goods, Non-Durable Common stock issued - CSL III Merger Stock Issued During Period, Value, Acquisitions Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Transfers in Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 Entity Address, State or Province Entity Address, State or Province Aerospace & Defense Aerospace Sector [Member] PEO Total Compensation Amount PEO Total Compensation Amount Retail Retail Sector [Member] Derivative Liabilities Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] Notional Amount Notional amount Derivative, Notional Amount Basic (in shares) Weighted-average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Schedule of Related Party Transactions Schedule of Related Party Transactions [Table Text Block] Schedule of Investments [Abstract] Investments, at fair value Noncash or Part Noncash Acquisition, Investments Acquired Investment Company, Nonconsolidated Subsidiary [Line Items] Investment Company, Nonconsolidated Subsidiary [Line Items] Sixth Street CLO 32, Ltd. Sixth Street CLO 32, Ltd. [Member] Sixth Street CLO 32, Ltd. Total purchase price Asset Acquisition, Consideration Transferred Ordinary income Investment Company, Distribution, Ordinary Income Weighted average debt principal outstanding Long-Term Debt, Average Amount Outstanding Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Net increase (decrease) in net assets resulting from operations attributable to Common Stockholders Basic Net Income (Loss) Available to Common Stockholders, Basic Investment Funds Other than Securities Investment [Member] Reinvestment of dividends Dividend reinvestment, consideration Dividend reinvestment Stock Issued During Period, Value, Dividend Reinvestment Plan Stock repurchase program, additional authorized amount Share Repurchase Program, Additional Authorized Amount Share Repurchase Program, Additional Authorized Amount Reductions/Sales/ Paydowns Investments in and Advances to Affiliates, at Fair Value, Gross Reductions 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Supplemental Data Selected Consolidated Balance Sheet Information Investment Company, Selected Consolidated Balance Sheet Information [Abstract] Investment Company, Selected Consolidated Balance Sheet Information Name Outstanding Recovery, Individual Name Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Class B-R Notes 2015-1N Debt, Class B-R Notes [Member] 2015-1N Debt, Class B-R Notes Non-cash Collateral Pledged Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Security Not Offset Line of Credit Facility, Increase (Decrease) [Roll Forward] Line of Credit Facility, Increase (Decrease) [Roll Forward] Line of Credit Facility, Increase (Decrease) Metals & Mining Metals And Mining Sector [Member] Metals And Mining Sector Cumulative convertible preferred stock, shares issued upon conversion (in shares) Convertible Preferred Stock, Shares Issued upon Conversion Geographical [Domain] Geographical [Domain] Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] CSL III Merger CSL III Merger [Member] CSL III Merger Investment type concentration Investment Type Concentration Risk [Member] Investment Type Concentration Risk Schedule of Investments [Table] Schedule of Investments [Table] Utilities: Oil & Gas Utilities, Oil And Gas Sector [Member] Utilities, Oil And Gas Sector Net change in unrealized (gain) loss on derivatives Unrealized Gain (Loss) on Derivatives Ratio to average net assets attributable to Common Stockholders: Investment Company, Financial Ratios [Abstract] Total Principal Amount Outstanding Total principal amount Long-Term Debt, Gross Total assets acquired Asset Acquisition, Assets Acquired Asset Acquisition, Assets Acquired Debt securities Debt Securities [Member] Asset Class [Domain] Asset Class [Domain] Related Party Transactions [Abstract] Credit Facilities, Senior Notes, and Debt Securitization – Related Costs, Expenses and Deferred Financing Costs Debt, Policy [Policy Text Block] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted PIK loan Payment in Kind (PIK) Note [Member] Pre-incentive Fee Net Investment Income, Exceeds Catch-up Threshold Investment Advisory Agreement - Incentive Rate, Pre-Incentive Fee Net Investment Income Exceeds Catch-Up Threshold [Member] Investment Advisory Agreement - Incentive Rate, Pre-Incentive Fee Net Investment Income Exceeds Catch-Up Threshold Entity Emerging Growth Company Entity Emerging Growth Company Related Party Transaction [Line Items] Related Party Transaction [Line Items] Derivative Instruments Derivatives, Policy [Policy Text Block] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Borrowings Proceeds from Lines of Credit Other liabilities Asset Acquisition, Liabilities, Other Asset Acquisition, Liabilities, Other DERIVATIVE INSTRUMENTS Derivative Instruments and Hedging Activities Disclosure [Text Block] Derivative liabilities, at fair value Noncash or Part Noncash Acquisition, Derivative Liability Assumed Noncash or Part Noncash Acquisition, Derivative Liability Assumed Derivative Liabilities subject to Master Netting Agreement Derivative Liability, Subject to Master Netting Arrangement, before Offset Number of subsidiaries Number Of Subsidiaries Number Of Subsidiaries Administrative service fees payable (Note 4) Administrative service fees payable Administrative Service Fee Payable Administrative Service Fee Payable Structured Credit Partners Structured Credit Partners, LLC [Member] Structured Credit Partners, LLC Investment Company, Net Assets [Roll Forward] Investment Company, Net Assets [Roll Forward] ATM Offering At The Market Offering [Member] At The Market Offering Organization, Consolidation and Presentation of Financial Statements [Abstract] Floating Rate Floating Rate [Member] Floating Rate Notional Amount to be Purchased Notional Amount to be Purchased Derivative Asset, Notional Amount Net investment income (loss) Investment Company, Investment Income (Loss) Ratio BBB, Carlyle US CLO 2026-3, Ltd, Tranche D BBB, Carlyle US CLO 2026-3, Ltd, Tranche D [Member] BBB, Carlyle US CLO 2026-3, Ltd, Tranche D Construction & Building Construction Sector [Member] All Executive Categories All Executive Categories [Member] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Repayments of Credit Facilities Repayments of Long-Term Lines of Credit Facility unused commitment fee Line of Credit Facility, Commitment Fee Amount Asset Acquisition [Domain] Asset Acquisition [Domain] Asset coverage, end of period Investment Company, Senior Security, Indebtedness, Asset Coverage Ratio Paydowns Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Fixed Rate Fixed Rate [Member] Fixed Rate Schedule of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Debt Disclosure [Abstract] Investment Company, Nonconsolidated Subsidiary [Domain] Investment Company, Nonconsolidated Subsidiary [Domain] SEGMENT REPORTING Segment Reporting [Text Block] Minimum Low Minimum [Member] Investment Type [Axis] Investment Type [Axis] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] LIABILITIES Liabilities [Abstract] Class A-1-2-B Notes 2015-1N Debt, Class A-1-2-B Notes [Member] 2015-1N Debt, Class 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or Part Noncash Acquisition, Value of Assets Acquired [Abstract] Schedule of Carrying Values and Fair Values of Debt Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] Exercise Price Award Exercise Price Stock repurchase program, authorized amount Share Repurchase Program, Authorized, Amount Acquisition of Credit Fund II Credit Fund II Purchase Credit Fund II Asset Acquisition [Member] Credit Fund II Asset Acquisition Document Quarterly Report Document Quarterly Report 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, measurement input Investment Company, Investment Owned, Measurement Input Investments, amortized cost Amortized Cost Investment Owned, Cost Interest expense payable Interest Payable Additions/Purchases Investments in and Advances to Affiliates, at Fair Value, Gross Additions Receivable for investments sold Receivable, Investment, Sale O 2025 M6 Dividends O 2025 M6 Dividends [Member] O 2025 M6 Dividends Preferred stock, liquidation preference (in dollars per share) Preferred Stock, Liquidation Preference Per Share Base management fees (Note 4) Base management fees Management Fee Expense O 2023 M3 Dividends O 2023 M3 Dividends [Member] O 2023 M3 Dividends Credit Fund Subscription Facility Credit Fund Subscription Facility [Member] Credit Fund Subscription Facility Indicative Quotes Measurement Input, Quoted Price [Member] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] CONSOLIDATED FINANCIAL HIGHLIGHTS Investment Company, Financial Highlights [Text Block] Equity Component [Domain] Equity Component [Domain] Net gains (losses) included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in 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Measurement Basis [Axis] Carlyle US CLO 2026-B, Ltd. Carlyle US CLO 2026-B, Ltd. [Member] Carlyle US CLO 2026-B, Ltd. Cash, Cash Equivalents and Restricted Cash Cash and Cash Equivalents, Policy [Policy Text Block] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Dividends and Distributions to Common Stockholders Stockholders' Equity, Policy [Policy Text Block] Investment Company [Abstract] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Schedule of Fair Value Inputs and Valuation Techniques Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Deferred financing costs and debt issuance costs paid Payments of Debt Issuance Costs Entity Current Reporting Status Entity Current Reporting Status 90-Day EURIBOR 90-Day EURIBOR [Member] 90-Day EURIBOR Net cash provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Controlled/affiliated Investment, Affiliated Issuer, Controlled [Member] Total Shareholder Return Amount Total Shareholder Return Amount Total return based on net asset value Investment Company, Total Return Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Netting [Axis] Netting [Axis] Netting Ownership interest Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Carlyle Credit Solutions, Inc. 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Healthcare & Pharmaceuticals Healthcare Sector [Member] Federal Funds Rate Federal Funds Rate [Member] Federal Funds Rate Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Table] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] 2030 Notes 2030 Senior Unsecured Notes [Member] 2030 Senior Unsecured Notes Restriction period three Restriction Period, Three [Member] Restriction Period, Three Current Fiscal Year End Date Current Fiscal Year End Date Investment balance (shares) Investment Owned, Balance, Shares Alternate Base Rate Alternate Base Rate [Member] Alternate Base Rate Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Chemicals, Plastics & Rubber Chemicals, Plastics And Rubber [Member] Chemicals, Plastics And 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Current AAA, Sixth Street CLO 32, Ltd, Tranche A-1 AAA, Sixth Street CLO 32, Ltd, Tranche A-1 [Member] AAA, Sixth Street CLO 32, Ltd, Tranche A-1 Less: Net increase (decrease) resulting from operations attributable to non-controlling interest Net Income (Loss) Attributable to Noncontrolling Interest Variable Rate [Axis] Variable Rate [Axis] Cash acquired in CSL III Merger Proceeds From Cash Acquired In Acquisition, Operating Activities Proceeds From Cash Acquired In Acquisition, Operating Activities Entity Small Business Entity Small Business Net change in unrealized appreciation (depreciation) on investments: Investment Owned, Recognized Unrealized Appreciation (Depreciation), Net [Abstract] Net Unrealized Gains (Losses) Germany GERMANY Fair Value, Asset, Recurring, Basis Still Held, Unrealized Gain (Loss), Statement Of Income, Extensible List, Not Disclosed Flag Fair Value, Asset, Recurring, Basis Still Held, Unrealized Gain (Loss), Statement Of Income, Extensible List, Not Disclosed 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Sixth Street CLO 32, Ltd, Tranche C A, Sixth Street CLO 32, Ltd, Tranche C [Member] A, Sixth Street CLO 32, Ltd, Tranche C Interest payable Noncash or Part Noncash Acquisition, Payables Assumed Executive Category: Executive Category [Axis] Investment Funds Investment Funds [Member] Investment Funds 2015-1 Issuer Preferred Interests 2015-1 Issuer Preferred Interests [Member] 2015-1 Issuer Preferred Interests Asset Acquisition Business Combination [Policy Text Block] LIABILITIES AND MEMBERS’ EQUITY LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Counterparty Name [Axis] Counterparty Name [Axis] Capital contribution Financial Support, Capital Contributions [Member] AUSTRALIA Australia AUSTRALIA JP Morgan Chase Bank N.A. JP Morgan Chase Bank N.A. [Member] JP Morgan Chase Bank N.A. Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Investments, at fair value Asset Acquisition, Investments Asset Acquisition, Investments Common Stock Issued by the Company Asset Acquisition, Consideration Transferred, Equity Interest Issued and Issuable Summary of Changes in Net Assets Investment Company, Change in Net Assets [Table Text Block] Supplemental disclosures: Supplemental Cash Flow Information [Abstract] PEO Name PEO Name Accrued expenses and other liabilities Accrued Liabilities and Other Liabilities Unused commitment fees payable Credit Facility Fees Payable, Unused Commitment Fees Credit Facility Fees Payable, Unused Commitment Fees Taxes, including excise tax, paid during the period Income Tax Paid, before Refund Received Software Software Sector [Member] Software Sector Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number S 2025 M3 Dividends S 2025 M3 Dividends [Member] S 2025 M3 Dividends Dividend and Interest Income Interest and Dividend Income, Securities, Operating Prepaid expenses and other assets Prepaid Expense and Other Assets Revenue Recognition Revenue [Policy Text Block] Preferred stock dividend Preferred stock dividend Preferred Stock Dividends, Income Statement Impact Number of investments sold Number Of Investments Sold Number Of Investments Sold AAA, Sixth Street CLO 32, Ltd, Tranche A-2 AAA, Sixth Street CLO 32, Ltd, Tranche A-2 [Member] AAA, Sixth Street CLO 32, Ltd, Tranche A-2 Ireland Ireland IRELAND Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Incentive rate Management and Service Fees, Incentive Rate Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] 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] Capital Equipment Capital Equipment [Member] Capital Equipment Debt Instrument [Axis] Debt Instrument [Axis] Subsequent Event [Table] Subsequent Event [Table] Annualized Hurdle Rate Investment Advisory Agreement - Incentive Rate, Annualized Hurdle Rate [Member] Investment Advisory Agreement - Incentive Rate, Annualized Hurdle Rate Italy ITALY Common stock issued - Preferred Stock Exchange (in shares) Stock Issued During Period, Shares, Conversion of Convertible Securities Accumulated Net Investment Income (Loss) Investment Company, Distributable Earnings, Accumulated Net Investment Income (Loss) [Member] Investment Company, Distributable Earnings, Accumulated Net Investment Income (Loss) Basic (in dollars per share) Earnings Per Share, Basic Measurement Input Type [Axis] Measurement Input Type [Axis] Insider Trading Arrangements [Line Items] Effective interest rate swap hedge Debt Instrument, Effective Interest Rate Swap Hedge Debt Instrument, Effective Interest Rate Swap Hedge 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] Capital Units by Class [Axis] Capital Units by Class [Axis] Par/ Principal Amount Total unfunded commitments Investment Company, Financial Support to Investee Contractually Required, Not Provided, Amount Fair Value Measurement [Domain] Fair Value Measurement [Domain] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] United Kingdom UNITED KINGDOM Interest receivable Asset Acquisition, Interest Receivable Asset Acquisition, Interest Receivable Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Annualized Catch-up Rate Investment Advisory Agreement - Incentive Rate, Annualized Catch-Up Threshold [Member] Investment Advisory Agreement - Incentive Rate, Annualized Catch-Up Threshold Concentration risk percentage % of Fair Value Percentage of portfolio with PIK provisions Concentration Risk, Percentage Tax return of capital Investment Company, Tax Return of Capital Distribution Credit Fund Sub 2025 Facility 2025 Credit Fund Sub Facility [Member] 2025 Credit Fund Sub Facility Equity Awards Adjustments Equity Awards Adjustments [Member] Asset Acquisition [Line Items] Asset Acquisition [Line Items] Media: Advertising, Printing & Publishing Media, Advertising, Printing And Publishing [Member] Media, Advertising, Printing And Publishing Fair value of loans on non-accrual status Investment Owned, Non-Accrual Status, At Fair Value Investment Owned, Non-Accrual Status, At Fair Value Industry Sector [Domain] Industry Sector [Domain] Netting Netting [Member] Netting Percent of net assets Investment Owned, Net Assets, Percentage Expenses before incentive fees Investment Company, Expense Ratio, after Fee Waiver and before Incentive Fee Deduction O 2026 M6 Dividends O 2026 M6 Dividends [Member] O 2026 M6 Dividends Credit Partners and the company Credit Partners USA LLC And Carlyle Secured Lending, Inc [Member] Credit Partners USA LLC And Carlyle Secured Lending, Inc Common stock issued - Preferred Stock Exchange Stock Issued During Period, Value, Conversion of Convertible Securities Derivative, early termination notice period Derivative, Early Termination Notice Period Derivative, Early Termination Notice Period France FRANCE Dividends declared (in dollars per share) Dividends declared (in dollars per share) Investment Company, Distribution to Shareholders, Per Share Administrative service fees payable Increase (Decrease) In Administrative Service Fee Payable Increase (Decrease) In Administrative Service Fee Payable Sixth Street SCP Warehouse 4, Ltd. Sixth Street SCP Warehouse 4, Ltd. [Member] Sixth Street SCP Warehouse 4, Ltd. Statement of Cash Flows [Abstract] Forward currency contracts Foreign Exchange Forward [Member] Environmental Industries Environmental Industries [Member] Environmental Industries Energy: Electricity Energy Sector, Electricity [Member] Energy Sector, Electricity Quarterly Hurdle Rate Investment Advisory Agreement - Incentive Rate, Quarterly Hurdle Rate [Member] Investment Advisory Agreement - Incentive Rate, Quarterly Hurdle Rate Schedule of Stock by Class Schedule of Stock by Class [Table Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Collateral, number of loans Debt Instrument, Collateral, Number Of Loans Debt Instrument, Collateral, Number Of Loans Investments Investment, Policy [Policy Text Block] Unused Fee Investment Company, Financial Commitment to Investee, Future Amount, Unused Fee Percentage Investment Company, Financial Commitment to Investee, Future Amount, Unused Fee Percentage TAX Income Tax Disclosure [Text Block] Investment Advisory Agreement - Incentive Rate, Total Capital Gains Investment Advisory Agreement - Incentive Rate, Total Capital Gains [Member] Investment Advisory Agreement - Incentive Rate, Total Capital Gains 180-Day SOFR 180-Day SOFR [Member] 180-Day SOFR Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net realized gain (loss) on forward currency contracts Gain (Loss) on Sale of Derivatives Entity Filer Category Entity Filer Category Independent Directors Director [Member] Auto Aftermarket & Services Automotive Sector [Member] O 2025 M9 Dividends O 2025 M9 Dividends [Member] O 2025 M9 Dividends Subsidiary or Equity Method Investee, Sale of Stock [Table] Subsidiary or Equity Method Investee, Sale of Stock [Table] Dividends [Axis] Dividends [Axis] Schedule of Offsetting Liabilities Offsetting Liabilities [Table Text Block] Weighted average interest rate Debt Instrument, Interest Rate During Period Luxembourg LUXEMBOURG Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Investment owned, percentage received Investment Owned, Percentage Investment Owned, Percentage S 2024 M6 Dividends S 2024 M6 Dividends [Member] S 2024 M6 Dividends Net realized gain (loss) on investments: Net Realized Gains (Losses) [Abstract] Net Realized Gains (Losses) Net change in unrealized appreciation (depreciation) relating to Level 3 investments still held at the reporting date and included within the Consolidated Statements of Operations Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) Other liabilities Noncash or Part Noncash Acquisition, Other Liabilities Assumed Entity Address, Address Line Two Entity Address, Address Line Two Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Net increase (decrease) resulting from operations Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Class B Capital Called Class B Capital Called [Member] Class B Capital Called Total investment income Total investment income Gross Investment Income, Operating Derivative liabilities, at fair value (Note 8) Derivative liabilities Derivative Liability Restriction period two Restriction Period, Two [Member] Restriction Period, Two Senior Notes Senior Notes [Member] Functional Currency Foreign Currency Transactions and Translations Policy [Policy Text Block] Entity Address, Address Line One Entity Address, Address Line One 2015-1N Debt, Class C-R Notes 2015-1N Debt, Class C-R Notes [Member] 2015-1N Debt, Class C-R Notes Net asset value multiplier Management and Service Fees, Net Asset Value Multiplier Management and Service Fees, Net Asset Value Multiplier Investments in and Advances to Affiliates, at Fair Value [Roll Forward] Investments in and Advances to Affiliates, at Fair Value [Roll Forward] Portfolio turnover Investment Company, Portfolio Turnover Transaction costs capitalized into purchase price Transaction Costs Capitalized Into Purchase Price Transaction Costs Capitalized Into Purchase Price O 2026 M7 Dividends O 2026 M7 Dividends [Member] O 2026 M7 Dividends Discounted Cash Flow Valuation Technique, Discounted Cash Flow [Member] Statement [Table] Statement [Table] Other assets Noncash or Part Noncash Acquisition, Other Assets Acquired AA, Sixth Street CLO 32, Ltd, Tranche B AA, Sixth Street CLO 32, Ltd, Tranche B [Member] AA, Sixth Street CLO 32, Ltd, Tranche B Derivative term Derivative, Contract Term Sixth Street SCP Warehouse 3, Ltd. Sixth Street SCP Warehouse 3, Ltd. [Member] Sixth Street SCP Warehouse 3, Ltd. Derivative Assets subject to Master Netting Agreement Derivative Asset, Subject to Master Netting Arrangement, before Offset Transaction costs Asset Acquisition, Consideration Transferred, Transaction Cost Upfront Payments / Receipts Derivative Liability, Upfront Payments (Receipts) Derivative Liability, Upfront Payments (Receipts) Cash denominated in foreign currency, acquisition cost Cash and Cash Equivalent, Held in Foreign Currency, Acquisition Cost Basis spread on variable rate Derivative, Basis Spread on Variable Rate Net change in unrealized currency gain (loss) on non-investment assets and liabilities Net change in unrealized currency (gain) loss on non-investment assets and liabilities Unrealized Gain (Loss), Foreign Currency Transaction, before Tax SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation and Significant Accounting Policies [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract]