v3.26.3
Fair Value of Financial Instruments - Schedule of Restricted Securities (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cost $ 2,264.2  
Fair Value $ 2,062.6  
% of Net Assets 41.30%  
Investment, Identifier [Axis]: 48Forty Solutions LLC, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 10,419  
Cost $ 0.5  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: 48Forty Solutions LLC, Common Stock | Commercial & Professional Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 10,419 [1],[2],[3],[4],[5] 25,122 [6],[7],[8],[9]
Investment, Identifier [Axis]: 48Forty Solutions LLC, Preferred Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 10,419  
Cost $ 55.6  
Fair Value $ 42.1  
% of Net Assets 0.80%  
Investment, Identifier [Axis]: 48Forty Solutions LLC, Preferred Stock | Commercial & Professional Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [1],[2],[3],[4],[5] 10,419  
Investment, Identifier [Axis]: 801 5th Ave, Seattle, ABF Equity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 8,355,231  
Cost $ 13.9  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: 801 5th Ave, Seattle, ABF Equity , Equity Real Estate Investment Trusts (REITs)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [7],[8],[9],[10],[11],[12]   8,355,231
Investment, Identifier [Axis]: 801 5th Ave, Seattle, ABF Equity | Equity Real Estate Investment Trusts (REITs)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [1],[2],[3],[4],[5] 8,355,231  
Investment, Identifier [Axis]: ATX Networks Corp, Class B-1 Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 500  
Cost $ 0.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: ATX Networks Corp, Class B-1 Common Stock | Capital Goods    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 500 [1],[2],[3],[4],[5],[13] 500 [7],[8],[9],[10],[11]
Investment, Identifier [Axis]: ATX Networks Corp, Class B-2 Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 900  
Cost $ 0.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: ATX Networks Corp, Class B-2 Common Stock | Capital Goods    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 900 [1],[2],[3],[4],[5],[13] 900 [7],[8],[9],[10],[11]
Investment, Identifier [Axis]: ATX Networks Corp, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 6,516  
Cost $ 0.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: ATX Networks Corp, Common Stock | Capital Goods    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 6,516 [1],[2],[3],[4],[5],[13] 6,516 [7],[8],[9],[10],[11],[14]
Investment, Identifier [Axis]: AVE Holdings I Corp (fka Amerivet Partners Management Inc), Preferred Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 19,106  
Cost $ 18.7  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: AVE Holdings I Corp (fka Amerivet Partners Management Inc), Preferred Stock | Health Care Equipment & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [2],[3],[4],[5],[15] 19,106  
Investment, Identifier [Axis]: Abacus JV, ABF Equity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 7,943,313  
Cost $ 7.9  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Abacus JV, ABF Equity , Insurance    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [7],[8],[9],[10],[11],[12]   8,787,703
Investment, Identifier [Axis]: Abacus JV, ABF Equity | Insurance    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [1],[2],[3],[4],[5],[13] 7,943,313  
Investment, Identifier [Axis]: Accelerator Investments Aggregator LP, ABF Equity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 948,603  
Cost $ 1.1  
Fair Value $ 0.5  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Accelerator Investments Aggregator LP, ABF Equity , Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [6],[7],[8],[9],[11],[12]   948,603
Investment, Identifier [Axis]: Accelerator Investments Aggregator LP, ABF Equity | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [2],[3],[4],[5],[13],[16] 948,603  
Investment, Identifier [Axis]: Accuride Corp, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 4,232,815  
Cost $ 0.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Accuride Corp, Common Stock | Capital Goods    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 4,232,815 [1],[2],[3],[4],[5] 4,232,815 [7],[8],[9],[10]
Investment, Identifier [Axis]: Accuride Corp, Preferred Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 2,422,249  
Cost $ 0.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Accuride Corp, Preferred Stock | Capital Goods    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 2,422,249 [1],[2],[3],[4],[5] 2,422,249 [7],[8],[9],[10]
Investment, Identifier [Axis]: Affordable Care Inc, Class A Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 69,504  
Cost $ 33.2  
Fair Value $ 31.6  
% of Net Assets 0.60%  
Investment, Identifier [Axis]: Affordable Care Inc, Class A Common Stock | Health Care Equipment & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [2],[3],[4],[5],[16] 69,504  
Investment, Identifier [Axis]: Affordable Care Inc, Class B Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 4,907  
Cost $ 2.3  
Fair Value $ 2.2  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Affordable Care Inc, Class B Common Stock | Health Care Equipment & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [2],[3],[4],[5],[16] 4,907  
Investment, Identifier [Axis]: Affordable Care Inc, Preferred Stock | Health Care Equipment & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [6],[8],[9]   78,731,049
Investment, Identifier [Axis]: Aggregator (GreenSky Holdings I)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 10,327,063  
Cost $ 10.3  
Fair Value $ 12.0  
% of Net Assets 0.20%  
Investment, Identifier [Axis]: Aggregator (GreenSky Holdings I) | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [3],[4],[5],[13],[16] 10,327,063  
Investment, Identifier [Axis]: Aggregator (Rockloans Marketplace LLC)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 1,436,583  
Cost $ 1.4  
Fair Value $ 1.2  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Aggregator (Rockloans Marketplace LLC) | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [1],[2],[3],[4],[5],[13] 1,436,583  
Investment, Identifier [Axis]: Aggregator 40 Act (AOP SFR 1 LLC (FKA Avenue One PropCo))    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 10,799,641  
Cost $ 10.8  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Aggregator 40 Act (AOP SFR 1 LLC (FKA Avenue One PropCo)) | Equity Real Estate Investment Trusts (REITs)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [1],[2],[3],[4],[5] 10,799,641  
Investment, Identifier [Axis]: Aggregator 40 Act (My Community Homes PropCo 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 26,991,221  
Cost $ 27.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Aggregator 40 Act (My Community Homes PropCo 2) | Equity Real Estate Investment Trusts (REITs)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [1],[2],[3],[4],[5] 26,991,221  
Investment, Identifier [Axis]: Alacrity Solutions Group LLC, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 2,144  
Cost $ 1.9  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Alacrity Solutions Group LLC, Common Stock | Insurance    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 2,144 [1],[2],[3],[4],[5] 2,144 [7],[8],[9],[10]
Investment, Identifier [Axis]: Alacrity Solutions Group LLC, Preferred Equity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 2,293  
Cost $ 2.3  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Alacrity Solutions Group LLC, Preferred Equity | Insurance    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 2,293 [1],[2],[3],[4],[5],[15] 2,293 [7],[8],[9],[10],[17]
Investment, Identifier [Axis]: Altavair AirFinance, ABF Equity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 1,630,249,000,000  
Cost $ 1.6  
Fair Value $ 3.6  
% of Net Assets 0.10%  
Investment, Identifier [Axis]: Altavair AirFinance, ABF Equity , Capital Goods    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [6],[8],[9],[11],[12]   39,109,556
Investment, Identifier [Axis]: Altavair AirFinance, ABF Equity | Capital Goods    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [1],[3],[4],[5],[13] 1,630,249  
Investment, Identifier [Axis]: American Vision Partners, Private Equity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 2,655,491  
Cost $ 2.7  
Fair Value $ 2.6  
% of Net Assets 0.10%  
Investment, Identifier [Axis]: American Vision Partners, Private Equity | Health Care Equipment & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 2,655,491 [2],[3],[4],[5] 2,655,491 [7],[8],[9]
Investment, Identifier [Axis]: Amerivet Partners Management Inc, Preferred Stock | Health Care Equipment & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [7],[8],[9],[17]   19,106
Investment, Identifier [Axis]: Australis Maritime II, ABF Equity , Transportation    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [8],[9],[10],[11],[12]   22,537,941
Investment, Identifier [Axis]: Australis Maritime, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 1,119,979  
Cost $ 1.1  
Fair Value $ 1.1  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Australis Maritime, Common Stock , Transportation    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [8],[9],[10],[11],[12]   1,281,444
Investment, Identifier [Axis]: Australis Maritime, Common Stock | Transportation    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [1],[3],[4],[5],[13] 1,119,979  
Investment, Identifier [Axis]: Auxilior Capital Partners Inc, Preferred Equity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 21,500,000  
Cost $ 21.5  
Fair Value $ 21.4  
% of Net Assets 0.40%  
Investment, Identifier [Axis]: Avenue One PropCo, ABF Equity , Equity Real Estate Investment Trusts (REITs)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [7],[8],[9],[10],[11],[12]   10,339,283
Investment, Identifier [Axis]: Avida Holding AB, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 764,640,807  
Cost $ 79.7  
Fair Value $ 42.9  
% of Net Assets 0.90%  
Investment, Identifier [Axis]: Avida Holding AB, Common Stock , Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [7],[8],[9],[10],[11],[12]   720,108,628
Investment, Identifier [Axis]: Avida Holding AB, Common Stock | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [1],[2],[3],[4],[5],[13] 764,640,807  
Investment, Identifier [Axis]: Belk Inc, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 632,040  
Cost $ 12.0  
Fair Value $ 19.4  
% of Net Assets 0.40%  
Investment, Identifier [Axis]: Belk Inc, Common Stock | Consumer Discretionary Distribution & Retail    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 632,040 [3],[4],[5],[16] 1,264,079 [6],[7],[8],[9]
Investment, Identifier [Axis]: Bond Aviation Holdings LLC, ABF Equity , Transportation    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [6],[7],[8],[9],[12]   78,953
Investment, Identifier [Axis]: Borden (New Dairy Opco), Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 11,167,000  
Cost $ 0.0  
Fair Value $ 14.4  
% of Net Assets 0.30%  
Investment, Identifier [Axis]: Borden (New Dairy Opco), Common Stock | Food, Beverage & Tobacco    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 11,167,000 [1],[2],[3],[5],[18],[19] 11,167,000 [7],[9],[10],[20],[21]
Investment, Identifier [Axis]: Bowery Farming Inc, Warrant    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 147,815,378  
Cost $ 0.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Bowery Farming Inc, Warrant | Food, Beverage & Tobacco    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 147,815,378 [2],[3],[4],[5] 147,815,378 [7],[8],[9]
Investment, Identifier [Axis]: Bowery Farming Inc, Warrants 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 1,918,831  
Cost $ 0.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Bowery Farming Inc, Warrants 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 161,828  
Cost $ 0.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Bowery Farming Inc, Warrants | Food, Beverage & Tobacco 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 161,828 [2],[3],[4],[5] 161,828 [7],[8],[9]
Investment, Identifier [Axis]: Bowery Farming Inc, Warrants | Food, Beverage & Tobacco 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 1,918,831 [2],[3],[4],[5] 1,918,831 [7],[8],[9]
Investment, Identifier [Axis]: Byrider Finance LLC, ABF Equity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 54,407  
Cost $ 0.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Byrider Finance LLC, ABF Equity , Automobiles & Components    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [7],[8],[9],[12],[22]   54,407
Investment, Identifier [Axis]: Byrider Finance LLC, ABF Equity | Automobiles & Components    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [2],[3],[4],[5],[23] 54,407  
Investment, Identifier [Axis]: CDS US Intermediate Holdings Inc, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 2,023,714  
Cost $ 18.3  
Fair Value $ 21.8  
% of Net Assets 0.40%  
Investment, Identifier [Axis]: CDS US Intermediate Holdings Inc, Common Stock | Media & Entertainment    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 2,023,714 [2],[3],[4],[5],[13] 2,023,714 [7],[8],[9],[11]
Investment, Identifier [Axis]: Capital Automotive LP, ABF Equity , Equity Real Estate Investment Trusts (REITs)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [8],[9],[10],[11],[12]   9,351,391
Investment, Identifier [Axis]: Cengage Learning, Inc, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 227,802  
Cost $ 7.5  
Fair Value $ 4.6  
% of Net Assets 0.10%  
Investment, Identifier [Axis]: Cengage Learning, Inc, Common Stock | Media & Entertainment    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 227,802 [2],[3],[4],[5] 227,802 [7],[8],[9]
Investment, Identifier [Axis]: Constellis Holdings LLC, Preferred Equity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 69,653  
Cost $ 0.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Constellis Holdings LLC, Preferred Equity | Capital Goods    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 69,653 [2],[3],[4],[5] 69,653 [7],[8],[9]
Investment, Identifier [Axis]: Cubic Corp, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 72  
Cost $ 0.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Cubic Corp, Common Stock | Software & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 72 [2],[3],[4],[5] 72 [7],[8],[9]
Investment, Identifier [Axis]: Cubic Corp, Preferred Equity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 36,445,084  
Cost $ 0.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Cubic Corp, Preferred Equity | Software & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 36,445,084 [2],[3],[4],[5],[15] 36,445,084 [7],[8],[9],[17]
Investment, Identifier [Axis]: Cubic Corp, Preferred Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 17,077,679  
Cost $ 12.8  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Cubic Corp, Preferred Stock | Software & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 17,077,679 [2],[3],[4],[5] 16,279,436 [7],[8],[9]
Investment, Identifier [Axis]: Cubic Corp, Warrant    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 76  
Cost $ 0.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Cubic Corp, Warrant | Software & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 76 [2],[3],[4],[5] 76 [7],[8],[9]
Investment, Identifier [Axis]: Danube - Alps Aggregator (PayPal Europe Sarl et Cie SCA)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 13,437,240  
Cost $ 15.1  
Fair Value $ 8.8  
% of Net Assets 0.20%  
Investment, Identifier [Axis]: Danube - Alps Aggregator (PayPal Europe Sarl et Cie SCA) | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [3],[4],[5],[13] 13,437,240  
Investment, Identifier [Axis]: Dental Care Alliance Inc, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 3,744,469  
Cost $ 33.1  
Fair Value $ 32.4  
% of Net Assets 0.70%  
Investment, Identifier [Axis]: Dental Care Alliance Inc, Common Stock | Health Care Equipment & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [2],[3],[4],[5],[16] 3,744,469  
Investment, Identifier [Axis]: Diversified Energy Co PLC, Common Stock | Energy    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [9],[11],[21],[24],[25]   1,480,771
Investment, Identifier [Axis]: Drive Revel, ABF Equity | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [8],[9],[11],[12]   17,940,045
Investment, Identifier [Axis]: Fourways Aggregator LP (Norway_France)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 2,870,756  
Cost $ 3.2  
Fair Value $ 3.6  
% of Net Assets 0.10%  
Investment, Identifier [Axis]: Fourways Aggregator LP (Norway_France) | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [3],[4],[5],[13] 2,870,756  
Investment, Identifier [Axis]: Galaxy Container, ABF Equity | Transportation    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [7],[8],[9],[10],[12]   235,566
Investment, Identifier [Axis]: Galaxy Universal LLC, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 1,811  
Cost $ 0.2  
Fair Value $ 0.1  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Galaxy Universal LLC, Common Stock | Consumer Durables & Apparel    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 1,811 [2],[3],[5],[19] 1,811 [7],[9],[21]
Investment, Identifier [Axis]: Galaxy Universal LLC, Preferred Stock 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 36,149  
Cost $ 5.6  
Fair Value $ 6.1  
% of Net Assets 0.10%  
Investment, Identifier [Axis]: Galaxy Universal LLC, Preferred Stock 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 20,604  
Cost $ 5.3  
Fair Value $ 9.7  
% of Net Assets 0.20%  
Investment, Identifier [Axis]: Galaxy Universal LLC, Preferred Stock | Consumer Durables & Apparel 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 36,149 [2],[3],[5],[19] 36,149 [7],[9],[21]
Investment, Identifier [Axis]: Galaxy Universal LLC, Preferred Stock | Consumer Durables & Apparel 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 20,604 [2],[3],[5],[19] 18,507 [7],[9],[21]
Investment, Identifier [Axis]: Galaxy Universal LLC, Trade Claim    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 7,701,195  
Cost $ 1.0  
Fair Value $ 0.5  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Galaxy Universal LLC, Trade Claim | Consumer Durables & Apparel    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 7,701,195 [2],[3],[4],[5] 7,701,195 [7],[8],[9]
Investment, Identifier [Axis]: Global Jet Capital LLC, Preferred Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 375,815,727  
Cost $ 206.6  
Fair Value $ 151.3  
% of Net Assets 3.00%  
Investment, Identifier [Axis]: Global Jet Capital LLC, Preferred Stock | Commercial & Professional Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 375,815,727 [2],[3],[4],[5],[23],[26] 425,557,318 [7],[8],[9],[12],[22],[27]
Investment, Identifier [Axis]: Gracent LLC, Class A Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 250  
Cost $ 0.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Gracent LLC, Class A Common Stock | Health Care Equipment & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 250 [1],[2],[3],[5],[19] 250 [7],[9],[10],[21]
Investment, Identifier [Axis]: Gracent LLC, Preferred Equity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 1,000  
Cost $ 0.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Gracent LLC, Preferred Equity | Health Care Equipment & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 1,000 [1],[2],[3],[5],[19] 1,000 [7],[9],[10],[21]
Investment, Identifier [Axis]: Gracent LLC, Preferred Stock B    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 745  
Cost $ 0.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Gracent LLC, Preferred Stock B | Health Care Equipment & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 745 [1],[2],[3],[5],[19] 745 [7],[9],[10],[21]
Investment, Identifier [Axis]: GreenSky Holdings LLC, ABF Equity | Financial Services 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [6],[7],[8],[9],[12]   10,662,084
Investment, Identifier [Axis]: GreenSky Holdings LLC, ABF Equity | Financial Services 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [6],[8],[9],[11],[12]   14,819,660
Investment, Identifier [Axis]: HM Dunn Co Inc, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 975  
Cost $ 0.0  
Fair Value $ 0.1  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: HM Dunn Co Inc, Common Stock | Capital Goods    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 975 [1],[2],[3],[4],[5] 975 [7],[8],[9],[10],[14]
Investment, Identifier [Axis]: HM Dunn Co Inc, Preferred Equity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 1,744  
Cost $ 14.9  
Fair Value $ 18.9  
% of Net Assets 0.40%  
Investment, Identifier [Axis]: HM Dunn Co Inc, Preferred Equity | Capital Goods    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 1,744 [1],[3],[4],[5] 1,590 [8],[9],[10]
Investment, Identifier [Axis]: Harley-Davidson Financial Services Inc, ABF Equity | Financial Services 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [8],[9],[11],[12]   7,415,463
Investment, Identifier [Axis]: Harley-Davidson Financial Services Inc, ABF Equity | Financial Services 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [8],[9],[11],[12]   25,990,438
Investment, Identifier [Axis]: Harley-Davidson Financial Services Inc, ABF Equity | Financial Services 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [7],[8],[9],[11],[12]   1,896,424
Investment, Identifier [Axis]: Hercules Aggregator LP (Flexsys Holdings Inc)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 17,830,035  
Cost $ 17.8  
Fair Value $ 17.5  
% of Net Assets 0.40%  
Investment, Identifier [Axis]: Hercules Aggregator LP (Flexsys Holdings Inc) | Materials    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [3],[4],[5] 17,830,035  
Investment, Identifier [Axis]: JW Aluminum Co, Preferred Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 102,237  
Cost $ 124.8  
Fair Value $ 222.8  
% of Net Assets 4.50%  
Investment, Identifier [Axis]: JW Aluminum Co, Preferred Stock | Materials    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 102,237 [1],[3],[4],[5],[23],[26] 102,237 [8],[9],[10],[22],[27]
Investment, Identifier [Axis]: KKR Altitude II Offshore Aggregator LP, Partnership Interest    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 86,353,783  
Cost $ 86.4  
Fair Value $ 93.7  
% of Net Assets 1.90%  
Investment, Identifier [Axis]: KKR Altitude II Offshore Aggregator LP, Partnership Interest | Capital Goods    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 86,353,783 [1],[3],[4],[5],[13] 107,005,707 [8],[9],[10],[11],[12]
Investment, Identifier [Axis]: KKR Altitude III Offshore Aggregator (Altitude III)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 415,303  
Cost $ 0.4  
Fair Value $ 0.4  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: KKR Altitude III Offshore Aggregator (Altitude III) | Capital Goods    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [1],[2],[3],[4],[5],[13] 415,303  
Investment, Identifier [Axis]: KKR Central Park Leasing Aggregator L.P., Partnership Interest    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 38,132,293  
Cost $ 38.1  
Fair Value $ 23.9  
% of Net Assets 0.50%  
Investment, Identifier [Axis]: KKR Central Park Leasing Aggregator L.P., Partnership Interest | Capital Goods    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [1],[2],[3],[4],[5],[13] 38,132,293  
Investment, Identifier [Axis]: KKR Chord IP Aggregator LP, Partnership Interest    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 35,894  
Cost $ 0.0  
Fair Value $ 0.1  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: KKR Chord IP Aggregator LP, Partnership Interest | Media & Entertainment    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 35,894 [1],[2],[3],[4],[5],[13] 35,894 [8],[9],[10],[11],[12]
Investment, Identifier [Axis]: KKR Lombardy Aggregator LP (SKP German Bank)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 3,118,590  
Cost $ 3.7  
Fair Value $ 3.5  
% of Net Assets 0.10%  
Investment, Identifier [Axis]: KKR Lombardy Aggregator LP (SKP German Bank) | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [3],[4],[5],[13] 3,118,590  
Investment, Identifier [Axis]: KKR Maverick Holdco Blocker (Bond Aviation Holdings LLC)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 78,953  
Cost $ 0.1  
Fair Value $ 0.1  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: KKR Maverick Holdco Blocker (Bond Aviation Holdings LLC) | Transportation    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [2],[3],[4],[5],[16] 78,953  
Investment, Identifier [Axis]: KKR Morrow ABF Aggregator LLC (Harley-Davidson Financial Services Inc)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 24,943,608  
Cost $ 24.9  
Fair Value $ 25.2  
% of Net Assets 0.50%  
Investment, Identifier [Axis]: KKR Morrow ABF Aggregator LLC (Harley-Davidson Financial Services Inc) | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [3],[4],[5],[13] 24,943,608  
Investment, Identifier [Axis]: KKR Morrow OpCo Aggregator LLC (Harley-Davidson Financial Services Inc)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 1,896,424  
Cost $ 1.9  
Fair Value $ 2.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: KKR Morrow OpCo Aggregator LLC (Harley-Davidson Financial Services Inc) | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [2],[3],[4],[5],[13] 1,896,424  
Investment, Identifier [Axis]: KKR Morrow Residual Purchase 1 LLC (Harley-Davidson Financial Services Inc)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 5,487,825  
Cost $ 5.5  
Fair Value $ 5.8  
% of Net Assets 0.10%  
Investment, Identifier [Axis]: KKR Morrow Residual Purchase 1 LLC (Harley-Davidson Financial Services Inc) | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [3],[4],[5],[13] 5,487,825  
Investment, Identifier [Axis]: KKR Rocket Loans Aggregator LLC, Partnership Interest | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [7],[8],[9],[10],[11],[12]   2,038,793
Investment, Identifier [Axis]: KKR Zeno Aggregator LP (K2 Aviation), Partnership Interest    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 3,306  
Cost $ 0.0  
Fair Value $ 0.4  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: KKR Zeno Aggregator LP (K2 Aviation), Partnership Interest | Capital Goods    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 3,306 [1],[3],[4],[5],[13] 3,306 [8],[9],[10],[11],[12]
Investment, Identifier [Axis]: KSC I Aircraft LP, ABF Equity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 17,708,647  
Cost $ 17.7  
Fair Value $ 18.0  
% of Net Assets 0.40%  
Investment, Identifier [Axis]: KSC I Aircraft LP, ABF Equity | Capital Goods    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 17,708,647 [1],[3],[4],[5],[13] 5,832,277 [7],[8],[9],[10],[11],[12]
Investment, Identifier [Axis]: Kellermeyer Bergensons Services LLC, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 26,230,661  
Cost $ 0.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Kellermeyer Bergensons Services LLC, Common Stock | Commercial & Professional Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 26,230,661 [1],[2],[3],[4],[5] 26,230,661 [7],[8],[9],[10],[14]
Investment, Identifier [Axis]: Kellermeyer Bergensons Services LLC, Preferred Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 26,230,661  
Cost $ 48.3  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Kellermeyer Bergensons Services LLC, Preferred Stock | Commercial & Professional Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 26,230,661 [1],[2],[3],[4],[5] 26,230,661 [7],[8],[9],[10],[14]
Investment, Identifier [Axis]: Kestra Financial Inc, Preferred Equity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 2,251  
Cost $ 2.3  
Fair Value $ 2.3  
% of Net Assets 0.10%  
Investment, Identifier [Axis]: Kestra Financial Inc, Preferred Equity | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [3],[4],[5] 2,251  
Investment, Identifier [Axis]: Kestra Financial Inc, Preferred Equity | Financial Services 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [8],[9]   2,050
Investment, Identifier [Axis]: Kestra Financial Inc, Preferred Equity | Financial Services 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [9],[28]   9,230
Investment, Identifier [Axis]: Kilter Finance 2.0, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 3,960,000  
Cost $ 4.0  
Fair Value $ 4.1  
% of Net Assets 0.10%  
Investment, Identifier [Axis]: Kilter Finance 2.0, Common Stock | Insurance    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [1],[3],[4],[5],[13] 3,960,000  
Investment, Identifier [Axis]: Kilter Finance, ABF Equity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 536,709  
Cost $ 0.5  
Fair Value $ 9.8  
% of Net Assets 0.20%  
Investment, Identifier [Axis]: Kilter Finance, ABF Equity | Insurance    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 536,709 [1],[2],[3],[4],[5],[13] 536,709 [7],[8],[9],[10],[11],[12]
Investment, Identifier [Axis]: Kilter Finance, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 37,119  
Cost $ 0.0  
Fair Value $ 0.3  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Kilter Finance, Common Stock | Insurance    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 37,119 [1],[2],[3],[4],[5],[13] 37,119 [7],[8],[9],[10],[11],[12]
Investment, Identifier [Axis]: Kilter Finance, Preferred Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 94,000,000.0  
Cost $ 94.0  
Fair Value $ 94.0  
% of Net Assets 1.90%  
Investment, Identifier [Axis]: Lido Advisors LLC, Class A Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 4,835,590  
Cost $ 5.0  
Fair Value $ 6.2  
% of Net Assets 0.10%  
Investment, Identifier [Axis]: Lido Advisors LLC, Class A Common Stock | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 4,835,590 [3],[5],[13],[19] 4,835,590 [7],[9],[11],[21]
Investment, Identifier [Axis]: Lido Advisors LLC, Class Z Preferred Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 4,835,590  
Cost $ 5.0  
Fair Value $ 6.2  
% of Net Assets 0.10%  
Investment, Identifier [Axis]: Lido Advisors LLC, Class Z Preferred Stock | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 4,835,590 [2],[3],[5],[13],[19] 4,835,590 [7],[9],[11],[21]
Investment, Identifier [Axis]: Lionbridge Technologies Inc, Common Equity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 55,474  
Cost $ 0.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Lionbridge Technologies Inc, Common Equity | Media & Entertainment    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [1],[2],[3],[4],[5] 55,474  
Investment, Identifier [Axis]: Lionbridge Technologies Inc, Preferred Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 13,868,322  
Cost $ 0.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Lionbridge Technologies Inc, Preferred Stock | Media & Entertainment    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [1],[2],[3],[4],[5] 13,868,322  
Investment, Identifier [Axis]: Lipari Foods LLC, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 9,488,222  
Cost $ 9.5  
Fair Value $ 7.7  
% of Net Assets 0.20%  
Investment, Identifier [Axis]: Lipari Foods LLC, Common Stock | Consumer Staples Distribution & Retail    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 9,488,222 [2],[3],[4],[5] 7,946,073 [7],[8],[9]
Investment, Identifier [Axis]: Magna Legal Services LLC, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 49,382  
Cost $ 4.9  
Fair Value $ 9.1  
% of Net Assets 0.20%  
Investment, Identifier [Axis]: Magna Legal Services LLC, Common Stock | Commercial & Professional Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 49,382 [2],[3],[5],[18] 4,938,192 [7],[9],[20]
Investment, Identifier [Axis]: Med-Metrix, Class B Common Units    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 178,667  
Cost $ 0.2  
Fair Value $ 0.2  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Med-Metrix, Class B Common Units | Software & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [2],[3],[4],[5] 178,667  
Investment, Identifier [Axis]: Med-Metrix, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 5,000,000  
Cost $ 5.0  
Fair Value $ 5.8  
% of Net Assets 0.10%  
Investment, Identifier [Axis]: Med-Metrix, Common Stock | Software & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 5,000,000 [2],[3],[4],[5] 5,000,000 [7],[8],[9]
Investment, Identifier [Axis]: Medallia Inc, Class A Equity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 83,011  
Cost $ 14.3  
Fair Value $ 14.3  
% of Net Assets 0.30%  
Investment, Identifier [Axis]: Medallia Inc, Class A Equity | Software & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [2],[3],[4],[5],[16] 83,011  
Investment, Identifier [Axis]: Medallia Inc, Preferred Equity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 41,505  
Cost $ 41.5  
Fair Value $ 41.5  
% of Net Assets 0.80%  
Investment, Identifier [Axis]: Medallia Inc, Preferred Equity | Software & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [3],[4],[5],[16] 41,505  
Investment, Identifier [Axis]: Miami Beach Medical Group LLC, Common Stock | Health Care Equipment & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [7],[8],[9]   6,978,924
Investment, Identifier [Axis]: Misys Ltd, Preferred Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 40,937  
Cost $ 39.7  
Fair Value $ 38.7  
% of Net Assets 0.80%  
Investment, Identifier [Axis]: Misys Ltd, Preferred Stock | Software & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 40,937 [3],[4],[5],[13] 55,321 [8],[9],[11]
Investment, Identifier [Axis]: My Community Homes PropCo 2, ABF Equity | Equity Real Estate Investment Trusts (REITs)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [7],[8],[9],[10],[11],[12]   26,991,221
Investment, Identifier [Axis]: NCI Inc, Class A-1 Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 42,923  
Cost $ 0.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: NCI Inc, Class A-1 Common Stock | Software & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 42,923 [1],[2],[3],[4],[5] 42,923 [7],[8],[9],[10]
Investment, Identifier [Axis]: NCI Inc, Class B-1 Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 30,121  
Cost $ 0.0  
Fair Value $ 0.1  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: NCI Inc, Class B-1 Common Stock | Software & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 30,121 [1],[2],[3],[4],[5] 30,121 [7],[8],[9],[10]
Investment, Identifier [Axis]: NCI Inc, Class C Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 49,406  
Cost $ 20.2  
Fair Value $ 65.4  
% of Net Assets 1.30%  
Investment, Identifier [Axis]: NCI Inc, Class C Common Stock | Software & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 49,406 [1],[2],[3],[4],[5] 49,406 [7],[8],[9],[10]
Investment, Identifier [Axis]: NCI Inc, Class I-1 Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 42,923  
Cost $ 0.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: NCI Inc, Class I-1 Common Stock | Software & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 42,923 [1],[2],[3],[4],[5] 42,923 [7],[8],[9],[10]
Investment, Identifier [Axis]: New Era Technology Inc, Common Stock | Software & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [7],[8],[9],[29]   9,426
Investment, Identifier [Axis]: New Era Technology Inc, Preferred Stock | Software & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [7],[8],[9],[29]   9,426
Investment, Identifier [Axis]: New Era Technology LLC, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 9,426  
Cost $ 0.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: New Era Technology LLC, Common Stock | Software & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [2],[3],[4],[5] 9,426  
Investment, Identifier [Axis]: New Era Technology LLC, Preferred Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 9,426  
Cost $ 4.8  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: New Era Technology LLC, Preferred Stock | Software & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [2],[3],[4],[5] 9,426  
Investment, Identifier [Axis]: NewStar Clarendon 2014-1A Class D | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [7],[8],[9],[11],[12]   8,310,000
Investment, Identifier [Axis]: Newday Group Jersey Ltd, ABF Equity | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [7],[8],[9],[11],[12]   27,817,038
Investment, Identifier [Axis]: Nidda Healthcare Holding AG, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 2,760,074  
Cost $ 3.2  
Fair Value $ 3.1  
% of Net Assets 0.10%  
Investment, Identifier [Axis]: Nidda Healthcare Holding AG, Common Stock | Pharmaceuticals, Biotechnology & Life Sciences    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [2],[3],[4],[5],[13] 2,760,074  
Investment, Identifier [Axis]: Norway_France, ABF Equity | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [8],[9],[11],[12]   5,661,824
Investment, Identifier [Axis]: One Call Care Management Inc, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 34,872  
Cost $ 2.1  
Fair Value $ 1.3  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: One Call Care Management Inc, Common Stock | Health Care Equipment & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 34,872 [2],[3],[4],[5],[16] 34,872 [6],[7],[8],[9]
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock A    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 371,992  
Cost $ 22.8  
Fair Value $ 17.4  
% of Net Assets 0.30%  
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock A | Health Care Equipment & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 371,992 [2],[3],[4],[5],[16] 371,992 [6],[7],[8],[9]
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock B    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 10,965,680  
Cost $ 11.2  
Fair Value $ 9.6  
% of Net Assets 0.20%  
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock B | Health Care Equipment & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 10,965,680 [2],[3],[4],[5],[15],[16] 10,965,680 [6],[8],[9]
Investment, Identifier [Axis]: PayPal Danube 2, ABF Equity | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [7],[8],[9],[11],[12]   26,133,273
Investment, Identifier [Axis]: PayPal Europe Sarl et Cie SCA, ABF Equity | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [8],[9],[11],[12]   60,414,951
Investment, Identifier [Axis]: Polyconcept North America Inc, Class A - 1 Units    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 30,000  
Cost $ 3.0  
Fair Value $ 2.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Polyconcept North America Inc, Class A - 1 Units | Household & Personal Products    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 30,000 [2],[3],[4],[5] 30,000 [7],[8],[9]
Investment, Identifier [Axis]: Powin Energy Corp/NV, Warrants | Capital Goods    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [7],[9],[12],[30]   2,067,356
Investment, Identifier [Axis]: Prime ST LLC, ABF Equity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 4,534,461  
Cost $ 7.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Prime ST LLC, ABF Equity | Equity Real Estate Investment Trusts (REITs)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 4,534,461 [1],[2],[3],[4],[5] 4,534,461 [7],[8],[9],[10],[11],[12]
Investment, Identifier [Axis]: Production Resource Group LLC, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 581,691  
Cost $ 95.3  
Fair Value $ 2.8  
% of Net Assets 0.10%  
Investment, Identifier [Axis]: Production Resource Group LLC, Common Stock | Media & Entertainment    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 581,691 [1],[2],[3],[4],[5] 581,691 [7],[8],[9],[10]
Investment, Identifier [Axis]: Proserv Acquisition LLC, Class A Preferred Units    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 837,780  
Cost $ 3.1  
Fair Value $ 0.6  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Proserv Acquisition LLC, Class A Preferred Units | Energy    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 837,780 [3],[4],[5],[13],[16] 837,780 [6],[7],[8],[9],[11]
Investment, Identifier [Axis]: Quoizel, LLC, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 4,563  
Cost $ 8.3  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Quoizel, LLC, Common Stock | Consumer Durables & Apparel    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 4,563 [1],[2],[3],[4],[5] 4,563 [7],[8],[9],[10]
Investment, Identifier [Axis]: Quorum Health Corp, Private Equity 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 5,521,128  
Cost $ 5.5  
Fair Value $ 10.3  
% of Net Assets 0.20%  
Investment, Identifier [Axis]: Quorum Health Corp, Private Equity 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 2,070,423  
Cost $ 2.1  
Fair Value $ 7.5  
% of Net Assets 0.20%  
Investment, Identifier [Axis]: Quorum Health Corp, Private Equity | Health Care Equipment & Services 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 5,521,128 [1],[2],[3],[4],[5] 5,521,128 [7],[8],[9],[10]
Investment, Identifier [Axis]: Quorum Health Corp, Private Equity | Health Care Equipment & Services 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 2,070,423 [1],[2],[3],[4],[5] 2,070,423 [7],[8],[9],[10]
Investment, Identifier [Axis]: Quorum Health Corp, Trade Claim    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 8,301,000  
Cost $ 0.7  
Fair Value $ 0.5  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Quorum Health Corp, Trade Claim | Health Care Equipment & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 8,301,000 [1],[2],[3],[4],[5] 8,301,000 [7],[8],[9],[10]
Investment, Identifier [Axis]: Quorum Health Corp, Trust Initial Funding Units    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 143,400  
Cost $ 0.2  
Fair Value $ 0.1  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Quorum Health Corp, Trust Initial Funding Units | Health Care Equipment & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 143,400 [1],[2],[3],[4],[5] 143,400 [7],[8],[9],[10]
Investment, Identifier [Axis]: Ravine - PIK Equity (Vehicle Secured Funding Trust)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 9,073,134  
Cost $ 9.1  
Fair Value $ 6.7  
% of Net Assets 0.10%  
Investment, Identifier [Axis]: Ravine - PIK Equity (Vehicle Secured Funding Trust) | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [3],[4],[5],[13] 9,073,134  
Investment, Identifier [Axis]: Residential Opportunities I LLC, ABF Equity | Real Estate Management & Development    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [7],[8],[9],[12]   39
Investment, Identifier [Axis]: Roemanu LLC, ABF Equity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 220,778,388  
Cost $ 222.9  
Fair Value $ 178.8  
% of Net Assets 3.60%  
Investment, Identifier [Axis]: Roemanu LLC, ABF Equity | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 220,778,388 [1],[2],[3],[4],[5] 220,778,388 [8],[9],[10],[12]
Investment, Identifier [Axis]: SKP German Bank, ABF Equity | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [7],[8],[9],[11],[12]   4,559,361
Investment, Identifier [Axis]: SPV (Residential Opportunities I LLC)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 39  
Cost $ 0.0  
Fair Value $ 0.1  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: SPV (Residential Opportunities I LLC) | Real Estate Management & Development    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [2],[3],[4],[5] 39  
Investment, Identifier [Axis]: SPV (SunPower Financial)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 2,509,227  
Cost $ 2.5  
Fair Value $ 2.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: SPV (SunPower Financial) | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [3],[4],[5],[13] 2,509,227  
Investment, Identifier [Axis]: SPV ALPS 2.0 Aggregator LP EUR (PayPal Danube 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 29,964,043  
Cost $ 34.8  
Fair Value $ 35.7  
% of Net Assets 0.70%  
Investment, Identifier [Axis]: SPV ALPS 2.0 Aggregator LP EUR (PayPal Danube 2) | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [3],[4],[5],[13] 29,964,043  
Investment, Identifier [Axis]: SPV ALPS 2.0 Aggregator LP GBP (PayPal Danube 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 2,099,064  
Cost $ 2.8  
Fair Value $ 2.9  
% of Net Assets 0.10%  
Investment, Identifier [Axis]: SPV ALPS 2.0 Aggregator LP GBP (PayPal Danube 2) | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [3],[4],[5],[13] 2,099,064  
Investment, Identifier [Axis]: SPV KKR Galaxy BDC Leveraged (Galaxy Container)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 314,088  
Cost $ 0.3  
Fair Value $ 0.3  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: SPV KKR Galaxy BDC Leveraged (Galaxy Container) | Transportation    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [1],[2],[3],[4],[5] 314,088  
Investment, Identifier [Axis]: SPV Magenta Holdings (GreenSky (Platform))    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 10,662,084  
Cost $ 10.7  
Fair Value $ 6.4  
% of Net Assets 0.10%  
Investment, Identifier [Axis]: SPV Magenta Holdings (GreenSky (Platform)) | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [2],[3],[4],[5],[16] 10,662,084  
Investment, Identifier [Axis]: SPV Olympus Holdco Limited (TDC LLP)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 90,027  
Cost $ 0.1  
Fair Value $ 0.1  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: SPV Olympus Holdco Limited (TDC LLP) | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [1],[2],[3],[4],[5],[13] 90,027  
Investment, Identifier [Axis]: SPV Slate US Blocker LLC (Slate Venture Holdings LP)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 17,673,700  
Cost $ 17.7  
Fair Value $ 23.6  
% of Net Assets 0.50%  
Investment, Identifier [Axis]: SPV Slate US Blocker LLC (Slate Venture Holdings LP) | Consumer Durables & Apparel    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [2],[3],[4],[5] 17,673,700  
Investment, Identifier [Axis]: SPV Solaris BDC Leveraged (Newday Group Jersey Ltd)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 4,172,556  
Cost $ 5.6  
Fair Value $ 9.1  
% of Net Assets 0.20%  
Investment, Identifier [Axis]: SPV Solaris BDC Leveraged (Newday Group Jersey Ltd) | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [2],[3],[4],[5],[13] 4,172,556  
Investment, Identifier [Axis]: Sallie Mae Levered, ABF Equity | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [7],[8],[9],[10],[11],[12]   1,143,192
Investment, Identifier [Axis]: Sea Financing Aggregator II LP (Australis Maritime II)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 22,297,359  
Cost $ 22.3  
Fair Value $ 22.2  
% of Net Assets 0.40%  
Investment, Identifier [Axis]: Sea Financing Aggregator II LP (Australis Maritime II) | Transportation    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [1],[3],[4],[5],[13] 22,297,359  
Investment, Identifier [Axis]: Slate Venture Holdings LP, ABF Equity | Consumer Durables & Apparel    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [8],[9],[11],[12]   17,673,700
Investment, Identifier [Axis]: Sorenson Communications LLC, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 42,731  
Cost $ 7.1  
Fair Value $ 3.3  
% of Net Assets 0.10%  
Investment, Identifier [Axis]: Sorenson Communications LLC, Common Stock | Telecommunication Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 42,731 [2],[3],[4],[5],[23],[26] 42,731 [7],[8],[9],[22],[27]
Investment, Identifier [Axis]: Star Mountain Diversified Credit Income Fund III, LP, ABF Equity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 18,887,332  
Cost $ 18.9  
Fair Value $ 24.1  
% of Net Assets 0.50%  
Investment, Identifier [Axis]: Star Mountain Diversified Credit Income Fund III, LP, ABF Equity | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 18,887,332 [2],[3],[5],[13],[31] 21,363,135 [9],[11],[12],[25]
Investment, Identifier [Axis]: Stuart Weitzman Inc, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 5,451  
Cost $ 0.0  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Stuart Weitzman Inc, Common Stock | Consumer Durables & Apparel    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 5,451 [2],[3],[4],[5] 5,451 [7],[8],[9]
Investment, Identifier [Axis]: SunPower Financial, ABF Equity | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [8],[9],[11],[12]   2,712,689
Investment, Identifier [Axis]: TDC LLP, ABF Equity | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [7],[8],[9],[10],[11],[12]   3,302
Investment, Identifier [Axis]: TDC LLP, Preferred Equity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 16,100,000  
Cost $ 21.5  
Fair Value $ 21.6  
% of Net Assets 0.40%  
Investment, Identifier [Axis]: TDC LLP, Preferred Equity | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [1],[3],[4],[5],[13] 16,100,000  
Investment, Identifier [Axis]: Tarifa Aggregator LP (Drive Revel)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 21,640,357,000,000  
Cost $ 24.4  
Fair Value $ 25.7  
% of Net Assets 0.50%  
Investment, Identifier [Axis]: Tarifa Aggregator LP (Drive Revel) | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [3],[4],[5],[13] 21,640,357  
Investment, Identifier [Axis]: Ultra Electronics Holdings PLC, Private Equity 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 1,272,105  
Cost $ 1.3  
Fair Value $ 13.3  
% of Net Assets 0.30%  
Investment, Identifier [Axis]: Ultra Electronics Holdings PLC, Private Equity 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 67,364,389  
Cost $ 0.7  
Fair Value $ 7.0  
% of Net Assets 0.10%  
Investment, Identifier [Axis]: Ultra Electronics Holdings PLC, Private Equity | Capital Goods 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 67,364,389 [2],[3],[4],[5],[13] 394,128,646 [7],[8],[9],[11]
Investment, Identifier [Axis]: Ultra Electronics Holdings PLC, Private Equity | Capital Goods 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 1,272,105 [2],[3],[4],[5],[13] 1,272,105 [7],[8],[9],[11]
Investment, Identifier [Axis]: Vehicle Secured Funding Trust, ABF Equity | Financial Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [8],[9],[11],[12]   10,555,713
Investment, Identifier [Axis]: Wittur Holding GmbH, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 11,630  
Cost $ 7.7  
Fair Value $ 0.0  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Wittur Holding GmbH, Common Stock | Capital Goods    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 11,630 [1],[2],[3],[4],[5],[13] 11,630 [7],[8],[9],[10],[11]
Investment, Identifier [Axis]: Zentiva, Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 611,982  
Cost $ 0.7  
Fair Value $ 0.8  
% of Net Assets 0.00%  
Investment, Identifier [Axis]: Zentiva, Common Stock | Pharmaceuticals, Biotechnology & Life Sciences    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) [2],[3],[4],[5],[13] 611,982  
Investment, Identifier [Axis]: Zentiva, Preferred Equity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 32,900,000  
Cost $ 37.2  
Fair Value $ 36.6  
% of Net Assets 0.70%  
Investment, Identifier [Axis]: athenahealth Inc, Preferred Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 406,730  
Cost $ 401.8  
Fair Value $ 415.1  
% of Net Assets 8.30%  
Investment, Identifier [Axis]: athenahealth Inc, Preferred Stock | Health Care Equipment & Services    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Shares (in shares) 406,730 [3],[4],[5],[16] 374,125 [6],[8],[9]
[1] Under the Investment Company Act of 1940, as amended, the Company generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of September 30, 2026, the Company held investments in portfolio companies of which it may be deemed to be an “affiliated person” and may be deemed to “control”. The following table presents certain information with respect to investments in portfolio companies of which the Company may be deemed to be an affiliated person and may be deemed to control for the nine months ended September 30, 2026:
Portfolio Company
Fair Value at December 31, 2025
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)
Fair Value at September 30, 2026
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend and Other Income(3)
Senior Secured Loans—First Lien
 48Forty Solutions LLC(4)
$— $15.8 $(0.7)$— $0.5 $15.6 $1.1 $— $— $— 
 48Forty Solutions LLC(4)
— 20.2 — — 0.6 20.8 1.4 — — — 
 Alacrity Solutions Group LLC 10.7 0.2 (7.1)0.1 (0.1)3.8 — 0.2 — — 
 Alacrity Solutions Group LLC 0.1 — (0.1)0.1 (0.1)— — — — — 
 ATX Networks Corp 27.9 2.5 — — — 30.4 — 2.5 — — 
 ATX Networks Corp 93.0 1.0 (3.7)— (44.2)46.1 — — 1.1 — 
 ATX Networks Corp — 7.8 — — — 7.8 — 0.4 — — 
 Gracent LLC 28.4 — (0.1)— (4.3)24.0 — — — — 
 HM Dunn Co Inc
19.2 — (0.1)— — 19.1 1.4 — — — 
 HM Dunn Co Inc4.0 1.4 — — — 5.4 0.4 — — — 
Kellermeyer Bergensons Services LLC220.3 16.3 (28.6)— (1.0)207.0 0.8 15.7 — — 
Kellermeyer Bergensons Services LLC40.3 0.3 — — (36.1)4.5 — — — — 
Kellermeyer Bergensons Services LLC— 27.3 (0.1)— 0.3 27.5 — — — — 
Lionbridge Technologies Inc— 60.6 (5.6)— (0.7)54.3 — 3.3 0.1 — 
Lionbridge Technologies Inc— 53.8 — — (46.7)7.1 — — — — 
NCI Inc30.7 — (1.1)— 0.1 29.7 2.2 — — — 
Production Resource Group LLC273.5 53.5 — — (4.9)322.1 — 25.9 — — 
Production Resource Group LLC— 10.1 — — 0.4 10.5 — 0.6 0.1 — 
Wittur Holding GmbH65.2 4.1 — — (7.8)61.5 0.6 2.6 — — 
Wittur Holding GmbH13.3 2.1 — — (2.9)12.5 1.3 0.5 — — 
Senior Secured Loans—Second Lien
Quoizel, LLC6.8 — — — (1.1)5.7 0.5 — — — 
Quoizel, LLC7.1 — — — (1.2)5.9 0.6 — — — 
Subordinated Debt
48Forty Solutions LLC— 0.7 — — — 0.7 — — — — 
Accuride Corp6.4 0.3 — — (0.2)6.5 — 0.2 — — 
Alacrity Solutions Group LLC3.8 0.2 — — (1.5)2.5 — 0.2 — — 
ATX Networks Corp3.9 — — — (3.9)— — — — — 
Portfolio Company
Fair Value at December 31, 2025
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)
Fair Value at September 30, 2026
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend and Other Income(3)
Asset Based Finance
801 5th Ave, Seattle, ABF Equity$— $— $— $— $— $— $— $— $— $— 
801 5th Ave, Seattle, Structured Mezzanine49.8 0.1 (3.5)— (1.4)45.0 1.5 — — — 
Abacus JV, ABF Equity0.8 — (0.9)— 0.1 — — — — — 
Aggregator (Rockloans Marketplace LLC)2.0 — (0.6)— (0.2)1.2 — — — (0.2)
Aggregator 40 Act (AOP SFR 1 LLC (FKA Avenue One PropCo))6.3 0.5 — — (6.8)— — — — — 
Aggregator 40 Act (My Community Homes PropCo 2)11.8 — — — (11.8)— — — — — 
Altavair AirFinance, ABF Equity(4)
— 8.7 (7.1)— 2.0 3.6 — — — 3.0 
AOP SFR 1 LLC (FKA Avenue One PropCo), Term Loan34.7 2.6 — — (0.1)37.2 — 0.8 — — 
Australis Maritime, Common Stock1.2 — (0.2)— 0.1 1.1 — — — 0.1 
Avida Holding AB, Common Stock51.7 4.8 — — (13.6)42.9 — — — — 
Avida Holding AB, Subordinated Bond1.6 — — — (0.1)1.5 0.1 — — — 
Capital Automotive LP, ABF Equity23.0 — (16.8)5.8 (12.0)— — — — 0.7 
Capital Automotive LP, Structured Mezzanine18.7 0.1 (18.7)0.3 (0.4)— 1.3 — — — 
Galaxy Container, Bond— 0.2 — — — 0.2 — — — — 
Galaxy Container, Bond— 0.7 — — — 0.7 — — — — 
Galaxy Container, Bond— 0.4 — — — 0.4 — — — — 
Kilter Finance 2.0, Common Stock— 4.0 — — 0.1 4.1 — — — 0.1 
Kilter Finance, ABF Equity3.0 — — — 6.8 9.8 — — — — 
Kilter Finance, Common Stock— — — — 0.3 0.3 — — — — 
Kilter Finance, Preferred Stock88.4 5.6 — — — 94.0 2.4 5.6 — — 
KKR Altitude II Offshore Aggregator LP, Partnership Interest115.7 10.8 (32.4)1.0 (1.4)93.7 — — — 12.2 
KKR Altitude III Offshore Aggregator (Altitude III)— 0.4 — — — 0.4 — — — — 
KKR Central Park Leasing Aggregator L.P., Partnership Interest27.0 — (1.0)— (2.1)23.9 — — — — 
KKR Chord IP Aggregator LP, Partnership Interest0.1 — — — — 0.1 — — — — 
KKR Zeno Aggregator LP (K2 Aviation), Partnership Interest1.0 — — — (0.6)0.4 — — — 1.2 
KSC I Aircraft LP, ABF Equity5.8 11.9 — — 0.3 18.0 — — — — 
My Community Homes PropCo 2, Term Loan69.4 2.1 (5.6)— (0.3)65.6 0.6 2.2 — — 
My Community Homes PropCo 2, Term Loan4.2 0.3 — — — 4.5 — 0.2 — — 
My Community Homes PropCo 2, Term Loan22.3 0.7 — — — 23.0 0.2 0.7 — — 
Prime ST LLC, ABF Equity— — — — — — — — — — 
Prime ST LLC, Structured Mezzanine23.7 0.1 (1.7)— 1.9 24.0 0.9 — — — 
Roemanu LLC, ABF Equity197.2 — — — (18.4)178.8 — — — — 
Sallie Mae Levered, ABF Equity1.1 1.7 (2.9)0.1 — — — — — 0.5 
Sallie Mae Levered, Bond4.3 — (4.3)— — — 0.3 — — — 
Sallie Mae Levered, Bond— 4.3 (4.3)— — — 0.2 — — — 
Sallie Mae Levered, Bond— 1.2 (1.2)— — — 0.1 — — — 
Portfolio Company
Fair Value at December 31, 2025
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)
Fair Value at September 30, 2026
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend and Other Income(3)
Sallie Mae Levered, Bond$— $0.6 $(0.6)$— $— $— $— $— $— $— 
Sallie Mae Levered, Term Loan0.1 0.3 (0.4)— — — — — — — 
Sea Financing Aggregator II LP (Australis Maritime II)23.3 — (0.2)— (0.9)22.2 — — — 2.5 
SPV KKR Galaxy BDC Leveraged (Galaxy Container)0.2 0.1 — — — 0.3 — — — — 
SPV Olympus Holdco Limited (TDC LLP)— 0.1 — — — 0.1 — — — — 
TDC LLP, Preferred Equity12.5 9.2 — — (0.1)21.6 1.9 — — — 
Credit Opportunities Partners JV, LLC
Credit Opportunities Partners JV, LLC1,967.9 — (189.0)(28.8)(116.1)1,634.0 — — — 157.7 
Equity/Other
 48Forty Solutions LLC, Preferred Stock(4)
— 0.5 — — (0.5)— — — — — 
 48Forty Solutions LLC, Common Stock(4)
— 55.6 — — (13.5)42.1 — — — — 
Accuride Corp, Common Stock— — — — — — — — — — 
Accuride Corp, Preferred Stock— — — — — — — — — — 
Alacrity Solutions Group LLC, Common Stock— — — — — — — — — — 
Alacrity Solutions Group LLC, Preferred Equity0.7 — — — (0.7)— — — — — 
ATX Networks Corp, Common Stock— — — (9.9)9.9 — — — — — 
ATX Networks Corp, Class B-1 Common Stock— — — (5.0)5.0 — — — — — 
ATX Networks Corp, Class B-2 Common Stock— — — (4.0)4.0 — — — — — 
Borden (New Dairy Opco), Common Stock11.1 — — — 3.3 14.4 — — — — 
Gracent LLC, Preferred Stock B— — — — — — — — — — 
Gracent LLC, Class A Common Stock— — — — — — — — — — 
Gracent LLC, Preferred Equity— — — (8.2)8.2 — — — — — 
HM Dunn Co Inc, Common Stock0.4 — — — (0.3)0.1 — — — — 
HM Dunn Co Inc, Preferred Equity15.6 1.5 — — 1.8 18.9 — 1.6 — — 
JW Aluminum Co, Preferred Stock170.4 — — — 52.4 222.8 — — — 10.9 
Kellermeyer Bergensons Services LLC, Common Stock— — — — — — — — — — 
Kellermeyer Bergensons Services LLC, Preferred Stock— — — — — — — — — — 
Lionbridge Technologies Inc, Preferred Stock— — — — — — — — — — 
Lionbridge Technologies Inc, Common Equity— — — — — — — — — — 
NCI Inc, Class A-1 Common Stock— — — — — — — — — — 
NCI Inc, Class B-1 Common Stock— — — — 0.1 0.1 — — — — 
NCI Inc, Class C Common Stock38.7 — — — 26.7 65.4 — — — — 
NCI Inc, Class I-1 Common Stock— — — — — — — — — — 
Production Resource Group LLC, Common Stock95.3 — — — (92.5)2.8 — — — — 
Quoizel, LLC, Common Stock2.7 — — — (2.7)— — — — — 
Quorum Health Corp, Private Equity10.0 — — — 0.3 10.3 — — — — 
Quorum Health Corp, Private Equity7.4 — — — 0.2 7.6 — — — — 
Quorum Health Corp, Trade Claim0.5 — — — — 0.5 — — — — 
Quorum Health Corp, Trust Initial Funding Units0.1 — — — — 0.1 — — — — 
Portfolio Company
Fair Value at December 31, 2025
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)
Fair Value at September 30, 2026
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend and Other Income(3)
Wittur Holding GmbH, Common Stock$14.2 $— $(0.3)$— $(13.9)$— $— $— $— $— 
Total$3,990.5 $407.3 $(338.9)$(48.5)$(341.7)$3,668.7 $19.8 $63.2 $1.3 $188.7 
[2] Security is non-income producing.
[3] Security may be deemed to be a “restricted security.” As of September 30, 2026, the aggregate fair value of these securities is $2,062.6, or 41.3% of the Company’s net assets. The initial acquisition dates have been included for such securities (see Note 8).
[4] Security or portion thereof is pledged as collateral supporting the amounts outstanding under the Senior Secured Revolving Credit Facility (see Note 9).
[5] Security may be an obligation of one or more entities affiliated with the named company.
[6] Under the Investment Company Act of 1940, as amended, the Company generally is deemed to be an “affiliated person” of a portfolio company if it owns 5% or more of the portfolio company’s voting securities and generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of December 31, 2025, the Company held investments in portfolio companies of which it may be deemed to be an “affiliated person” but is not deemed to “control”. The following table presents certain information with respect to investments in portfolio companies of which the Company may be deemed to be an affiliated person for the year ended December 31, 2025:
Portfolio Company
Fair Value at December 31, 2024
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)
Fair Value at December 31, 2025
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend and Other Income(3)
Senior Secured Loans—First Lien
48Forty Solutions LLC
$148.5 $6.3 $(0.4)$— $(68.4)$86.0 $1.7 $6.3 $— $— 
48Forty Solutions LLC
3.0 4.4 (0.7)— (3.8)2.9 0.2 — — — 
Affordable Care Inc35.2 13.6 (1.0)— (3.2)44.6 3.1 1.1 — — 
Affordable Care Inc22.2 0.7 — — (1.5)21.4 1.7 0.7 — — 
Belk Inc29.5 — (6.6)— 0.2 23.1 3.8 — — — 
Galaxy Universal LLC86.3 — (86.3)— — — 9.4 — 0.2 — 
Portfolio Company
Fair Value at December 31, 2024
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)
Fair Value at December 31, 2025
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend and Other Income(3)
Galaxy Universal LLC$18.5 $1.9 $(20.4)$— $— $— $2.1 $— $0.1 $— 
Galaxy Universal LLC— 45.5 (45.5)— — — 4.5 — 2.0 — 
Galaxy Universal LLC— 37.5 (37.5)— — — 3.1 — 1.1 — 
One Call Care Management Inc4.7 — (4.8)0.1 — — 0.4 — — — 
Senior Secured Loans—Second Lien
 Constellis Holdings LLC(4)
7.0 — (6.8)— (0.2)— — — — — 
Other Senior Secured Debt
 One Call Care Management Inc
25.1 2.4 — — 0.8 28.3 (0.1)2.6 — — 
Asset Based Finance
Accelerator Investments Aggregator LP, Private Equity
0.9 — (0.4)— 0.1 0.6 — — — — 
Altavair AirFinance, ABF Equity128.2 — (82.4)(1.0)3.8 48.6 — — — 20.0 
Bond Aviation Holdings LLC, Term Loan— 0.1 — — — 0.1 — — — — 
Bond Aviation Holdings LLC, Term Loan— 0.7 — — — 0.7 — — — — 
Bond Aviation Holdings LLC, ABF Equity— 4.9 — — — 4.9 0.1 — 0.2 — 
GreenSky Holdings LLC, ABF Equity14.9 — — — (0.4)14.5 — — — — 
GreenSky Holdings LLC, ABF Equity22.3 2.6 (8.4)— (1.2)15.3 — — — 3.6 
GreenSky Holdings LLC, Term Loan33.5 3.2 — — — 36.7 — 3.4 — — 
Equity/Other
48Forty Solutions LLC, Common Stock— — — — — — — — — — 
Affordable Care Inc, Preferred Stock73.1 9.9 — — (10.7)72.3 — 9.9 — — 
athenahealth Inc, Preferred Stock361.3 40.2 (20.1)0.4 1.9 383.7 — 40.3 — — 
Belk Inc, Common Stock27.1 4.2 — — 5.8 37.1 — — — — 
Constellis Holdings LLC, Private Equity— — — (10.3)10.3 — — — — — 
Constellis Holdings LLC, Preferred Equity3.4 — (3.2)— (0.2)— — — — — 
Galaxy Universal LLC, Common Stock49.2 — (43.9)8.5 (13.8)— — — — — 
Galaxy Universal LLC, Trade Claim1.9 — (2.5)— 0.6 — — — — — 
Galaxy Universal LLC, Preferred Stock7.2 0.7 (5.6)— (2.3)— — 0.8 — — 
One Call Care Management Inc, Preferred Stock A20.7 — — — (3.2)17.5 — — — — 
One Call Care Management Inc, Common Stock1.9 — — — (1.0)0.9 — — — — 
One Call Care Management Inc, Preferred Stock B12.2 0.8 — — 0.2 13.2 — 0.9 — — 
Proserv Acquisition LLC, Class A Preferred Units2.2 — — — — 2.2 — — — — 
Total$1,140.0 $179.6 $(376.5)$(2.3)$(86.2)$854.6 $30.0 $66.0 $3.6 $23.6 
[7] Security is non-income producing.
[8] Security or portion thereof is pledged as collateral supporting the amounts outstanding under the Senior Secured Revolving Credit Facility (see Note 9).
[9] Security may be an obligation of one or more entities affiliated with the named company.
[10] Under the Investment Company Act of 1940, as amended, the Company generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of December 31, 2025, the Company held investments in portfolio companies of which it may be deemed to be an “affiliated person” and may be deemed to “control”. During the year ended December 31, 2025, the Company disposed of investments in portfolio companies of which it may be deemed to be an “affiliated person” and may be deemed to “control”. The following table presents certain information with respect to investments in portfolio companies of which the Company may be deemed to be an affiliated person and may be deemed to control for the year ended December 31, 2025:
Portfolio Company
Fair Value at December 31, 2024
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)
Fair Value at December 31, 2025
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend and Other Income(3)
Senior Secured Loans—First Lien
Alacrity Solutions Group LLC$— $10.6 $— $— $0.1 $10.7 $0.6 $0.3 $— $— 
Alacrity Solutions Group LLC— — — — 0.1 0.1 — — — — 
ATX Networks Corp37.0 1.1 (37.5)— (0.6)— — 1.0 — — 
ATX Networks Corp15.3 12.6 — — — 27.9 — 2.3 — — 
ATX Networks Corp50.6 43.0 — — (0.6)93.0 0.2 9.1 1.1 — 
Gracent LLC29.6 4.7 — — (5.9)28.4 1.0 3.7 — — 
HM Dunn Co Inc34.8 — (13.1)(2.5)— 19.2 2.8 — — — 
HM Dunn Co Inc3.4 2.6 (2.0)— — 4.0 0.5 — — — 
Kellermeyer Bergensons Services LLC201.6 21.5 (1.9)— (0.9)220.3 0.8 20.7 — — 
Kellermeyer Bergensons Services LLC87.7 5.9 — — (53.3)40.3 — 3.9 — — 
NCI Inc32.1 — (1.4)— — 30.7 3.8 — — — 
Production Resource Group LLC195.9 — (192.0)— (3.9)— 1.3 6.9 — — 
Production Resource Group LLC0.3 — (0.2)— (0.1)— — — — — 
Production Resource Group LLC67.7 — (65.7)— (2.0)— 1.0 3.2 — — 
Production Resource Group LLC37.2 — (36.0)— (1.2)— 0.5 1.8 — — 
Production Resource Group LLC107.4 — (104.3)— (3.1)— 1.6 5.1 — — 
Production Resource Group LLC— — — — — — 0.1 0.3 — — 
Production Resource Group LLC— — — — — — 0.2 — — — 
Production Resource Group LLC— 263.9 — — 9.6 273.5 0.1 7.1 — — 
Wittur Holding GmbH54.1 3.8 — — 7.3 65.2 0.7 3.1 — — 
Wittur Holding GmbH— 6.3 — — 7.0 13.3 1.0 0.4 — — 
Worldwise Inc(4)
19.1 — (19.1)— — — — — — — 
Worldwise Inc— — — — — — — — — — 
Senior Secured Loans—Second Lien
Quoizel, LLC7.1 — — — (0.3)6.8 0.8 — — — 
Quoizel, LLC7.4 — — — (0.3)7.1 0.8 — — — 
Other Senior Secured Debt
JW Aluminum Co76.6 — (76.4)0.3 (0.5)— 1.9 — — — 
Subordinated Debt
Accuride Corp— 4.3 — — 2.1 6.4 0.1 0.1 — — 
Alacrity Solutions Group LLC— 3.8 — — — 3.8 — 0.4 — — 
ATX Networks Corp32.9 — — — (29.0)3.9 — — — — 
Portfolio Company
Fair Value at December 31, 2024
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)
Fair Value at December 31, 2025
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend and Other Income(3)
Asset Based Finance
801 5th Ave, Seattle, Structure Mezzanine$54.5 $2.1 $— $— $(6.8)$49.8 $6.2 $1.9 $— $— 
801 5th Ave, Seattle, ABF Equity— — (0.1)— 0.1 — — — — — 
Abacus JV, ABF Equity24.6 — (27.0)0.7 2.5 0.8 — — — — 
Australis Maritime, Common Stock11.3 — (10.3)— 0.2 1.2 — — — 0.2 
Australis Maritime II, ABF Equity19.8 9.8 (7.0)— 0.7 23.3 — — — 1.4 
Avenue One PropCo, ABF Equity10.2 — — — (3.9)6.3 — — — — 
Avenue One PropCo, Term Loan32.3 2.4 — — — 34.7 — 2.4 — — 
Avida Holding AB, Common Stock60.4 — — — (8.7)51.7 — — — — 
Avida Holding AB, Subordinated Bond1.3 — — — 0.3 1.6 0.2 — — — 
Capital Automotive LP, ABF Equity32.9 — (17.8)6.7 1.2 23.0 — — — 1.7 
Capital Automotive LP, Structured Mezzanine40.1 — (21.4)0.1 (0.1)18.7 2.8 — — — 
Discover Financial Services, Subordinated Loan38.8 — (38.8)— — — 2.7 — — — 
Discover Financial Services, ABF Equity21.7 — (21.4)0.5 (0.8)— — — — 1.3 
Galaxy Container, ABF Equity— 0.2 — — — 0.2 — — — — 
Kilter Finance, Preferred Stock85.4 18.6 (15.6)— — 88.4 6.1 3.8 — — 
Kilter Finance, ABF Equity0.5 — — — 2.5 3.0 — — — — 
KKR Altitude II Offshore Aggregator LP, Partnership Interest146.7 27.6 (62.0)3.9 (0.5)115.7 — — — 15.2 
KKR Central Park Leasing Aggregator L.P., Partnership Interest15.8 — — — 11.2 27.0 — — — — 
KKR Chord IP Aggregator LP, Partnership Interest0.1 — — — — 0.1 — — — 0.2 
KKR Rocket Loans Aggregator LLC, Partnership Interest4.3 — (2.9)— 0.6 2.0 — — — — 
KKR Zeno Aggregator LP (K2 Aviation), Partnership Interest7.2 — (2.9)0.3 (3.6)1.0 — — — 7.2 
KSC I Aircraft LP, ABF Equity— 5.8 — — — 5.8 — — — — 
My Community Homes PropCo 2, ABF Equity15.6 6.7 — — (10.5)11.8 — — — — 
My Community Homes PropCo 2, Term Loan64.4 5.0 — — — 69.4 — 5.1 — — 
My Community Homes PropCo 2, Term Loan— 4.2 — — — 4.2 — 0.2 — — 
My Community Homes PropCo 2, Term Loan— 22.3 — — — 22.3 — 0.9 — — 
Prime St LLC, ABF Equity— — (1.1)(0.8)1.9 — — — — — 
Prime St LLC, Structured Mezzanine27.6 4.0 — — (7.9)23.7 3.7 3.7 — — 
Roemanu LLC (FKA Toorak Capital Partners LLC), ABF Equity238.9 — (13.6)— (28.1)197.2 — — — 9.4 
Sallie Mae Levered, ABF Equity— 1.1 — — — 1.1 — — — — 
Sallie Mae Levered, Bond— 4.3 — — — 4.3 — — — — 
Sallie Mae Levered, Term Loan— 0.1 — — — 0.1 — — — — 
TDC LLP, Preferred Equity36.8 15.9 (41.9)1.0 0.7 12.5 1.5 — — — 
TDC LLP, ABF Equity1.9 — (2.0)— 0.1 — — — — — 
Portfolio Company
Fair Value at December 31, 2024
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)
Fair Value at December 31, 2025
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend and Other Income(3)
Credit Opportunities Partners JV, LLC
Credit Opportunities Partners JV, LLC$1,363.3 $630.2 $— $— $(25.6)$1,967.9 $— $— $— $232.5 
Equity/Other
Accuride Corp, Common Stock— — — — — — — — — — 
Accuride Corp, Preferred Stock— — — — — — — — — — 
Alacrity Solutions Group LLC, Common Stock— 1.9 — — (1.9)— — — — — 
Alacrity Solutions Group LLC, Preferred Equity— 2.3 — — (1.6)0.7 — 0.2 — — 
ATX Networks Corp, Common Stock— — — — — — — — — — 
ATX Networks Corp, Class B-1 Common Stock— — — — — — — — — — 
ATX Networks Corp, Class B-2 Common Stock— — — — — — — — — — 
Borden (New Dairy Opco), Common Stock18.4 — — — (7.3)11.1 — — — — 
Gracent LLC, Preferred Stock B— — — — — — — — — — 
Gracent LLC, Class A Common Stock— — — — — — — — — — 
Gracent LLC, Preferred Equity5.0 — — — (5.0)— — — — — 
HM Dunn Co Inc, Preferred Stock, Series A0.1 — — (7.1)7.0 — — — — — 
HM Dunn Co Inc, Preferred Stock, Series B— — — — — — — — — — 
HM Dunn Co Inc, Preferred Equity
— 13.4 — — 2.2 15.6 — 0.9 — — 
HM Dunn Co Inc, Common Stock
— — — — 0.4 0.4 — — — — 
JW Aluminum Co, Common Stock2.5 — — — (2.5)— — — — — 
JW Aluminum Co, Preferred Stock152.3 — (156.4)(58.1)62.2 — — — — — 
JW Aluminum Co, Preferred Stock— 135.2 (10.4)— 45.6 170.4 — — — 14.3 
Kellermeyer Bergensons Services LLC, Common Stock— — — — — — — — — — 
Kellermeyer Bergensons Services LLC, Preferred Stock15.1 — — — (15.1)— — — — — 
Kilter Finance, Common Stock— — — — — — — — — — 
NCI Inc, Class A-1 Common Stock— — — — — — — — — — 
NCI Inc, Class B-1 Common Stock— — — — — — — — — — 
NCI Inc, Class C Common Stock33.1 — — — 5.6 38.7 — — — — 
NCI Inc, Class I-1 Common Stock— — — — — — — — — — 
Production Resource Group LLC, Preferred Stock, Series A PIK67.2 — — (18.1)(49.1)— — — — — 
Production Resource Group LLC, Preferred Stock, Series B PIK— — — — — — — — — — 
Quoizel, LLC, Common Stock6.1 — — — (3.4)2.7 — — — — 
Production Resource Group LLC, Common Stock— 95.3 — — — 95.3 — — — — 
Quorum Health Corp, Trade Claim0.9 — — — (0.4)0.5 — — — — 
Quorum Health Corp, Trust Initial Funding Units0.1 — — — — 0.1 — — — — 
Quorum Health Corp, Private Equity10.1 0.9 — — (1.0)10.0 — — — — 
Quorum Health Corp, Private Equity— 2.1 — — 5.3 7.4 — — — — 
Wittur Holding GmbH, Common Stock10.9 — — — 3.3 14.2 — — — — 
Portfolio Company
Fair Value at December 31, 2024
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)
Fair Value at December 31, 2025
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend and Other Income(3)
Worldwise Inc, Common Stock$0.7 $— $— $(0.6)$(0.1)$— $— $— $— $— 
Total
$3,776.7 $1,395.5 $(1,002.2)$(73.7)$(105.8)$3,990.5 $43.0 $88.5 $1.1 $283.4 
[11] The investment is not a qualifying asset under the Investment Company Act of 1940, as amended. A business development company may not acquire any asset other than qualifying assets, unless, at the time the acquisition is made, qualifying assets represent at least 70% of the company’s total assets. As of December 31, 2025, 70.6% of the Company’s total assets represented qualifying assets.
[12] Denominated in U.S. dollars unless otherwise noted.
[13] The investment, or a portion of the investment is not a qualifying asset under the Investment Company Act of 1940, as amended. A business development company may not acquire any asset other than qualifying assets, unless, at the time the acquisition is made, qualifying assets represent at least 70% of the company’s total assets. As of September 30, 2026, 75.4% of the Company’s total assets represented qualifying assets.
[14] Security or portion thereof held within Juniata River LLC and is pledged as collateral supporting the amounts outstanding under a term loan credit facility with JPMorgan Chase Bank, N.A.
[15] Asset is on non-accrual status.
[16] Under the Investment Company Act of 1940, as amended, the Company generally is deemed to be an “affiliated person” of a portfolio company if it owns 5% or more of the portfolio company’s voting securities and generally is deemed to “control” a portfolio company if it owns more than 25% of the portfolio company’s voting securities or it has the power to exercise control over the management or policies of such portfolio company. As of September 30, 2026, the Company held investments in portfolio companies of which it may be deemed to be an “affiliated person” but is not deemed to “control”. The following table presents certain information with respect to investments in portfolio companies of which the Company may be deemed to be an affiliated person for the nine months ended September 30, 2026:
Portfolio Company
Fair Value at December 31, 2025
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)
Fair Value at September 30, 2026
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend and Other Income(3)
Senior Secured Loans—First Lien
48Forty Solutions LLC(4)
$86.0 $— $(85.7)$(93.8)$93.5 $— $— $— $— $— 
48Forty Solutions LLC(4)
2.9 — (4.1)(4.2)5.4 — — — — — 
Affordable Care Inc11.8 — (11.5)(1.2)0.9 — — — — — 
Portfolio Company
Fair Value at December 31, 2025
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)
Fair Value at September 30, 2026
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend and Other Income(3)
Affordable Care Inc$54.2 $— $(52.4)$(5.7)$3.9 $— $— $— $— $— 
Affordable Care Inc— 5.9 — — 0.3 6.2 0.2 — — — 
Affordable Care Inc— 16.2 — — — 16.2 0.4 — — — 
Belk Inc23.1 — (22.8)— (0.3)— 1.8 — 2.1 — 
Dental Care Alliance Inc— 9.4 — — 0.6 10.0 0.3 — — — 
Dental Care Alliance Inc— 58.6 (0.2)— — 58.4 1.6 0.4 — — 
Medallia Inc— 66.1 — — 0.3 66.4 1.1 — — — 
Other Senior Secured Debt
 One Call Care Management Inc 28.3 8.2 — — 4.4 40.9 0.1 2.4 — — 
Subordinated Debt
Affordable Care Inc— 14.8 — — — 14.8 — 0.4 — — 
Asset Based Finance
Accelerator Investments Aggregator LP, ABF Equity0.6 — — — (0.1)0.5 — — — — 
Aggregator (GreenSky Holdings I)15.3 — (4.5)— 1.2 12.0 — — — 1.0 
Altavair AirFinance, ABF Equity(4)
48.6 — (39.1)— (9.5)— — — — 3.0 
Bond Aviation Holdings LLC, Term Loan4.9 14.5 — — — 19.4 0.9 — — — 
Bond Aviation Holdings LLC, Term Loan0.7 0.1 — — — 0.8 — 0.1 — — 
GreenSky Holdings LLC, Term Loan36.7 1.7 (3.7)— — 34.7 — 2.4 — — 
KKR Maverick Holdco Blocker (Bond Aviation Holdings LLC)0.1 — — — — 0.1 — — — — 
SPV Magenta Holdings (GreenSky (Platform))14.5 — — — (8.1)6.4 — — — — 
Equity/Other
 48Forty Solutions LLC, Common Stock(4)
— — — — — — — — — — 
Affordable Care Inc, Preferred Stock72.3 — (2.4)(75.4)5.5 — — — — — 
Affordable Care Inc, Class A Common Stock— 33.2 — — (1.6)31.6 — — — — 
Affordable Care Inc, Class B Common Stock— 2.3 — — (0.1)2.2 — — — — 
athenahealth Inc, Preferred Stock383.7 32.6 — — (1.2)415.1 — 32.6 — — 
Belk Inc, Common Stock37.1 — (19.9)10.1 (7.9)19.4 — — — 24.9 
Dental Care Alliance Inc, Common Stock— 33.1 — — (0.7)32.4 — — — — 
Medallia Inc, Class A Equity— 14.3 — — — 14.3 — — — — 
Medallia Inc, Preferred Equity— 41.5 — — — 41.5 — 0.9 — — 
One Call Care Management Inc, Common Stock0.9 — — — 0.4 1.3 — — — — 
One Call Care Management Inc, Preferred Stock A17.5 — — — (0.1)17.4 — — — — 
One Call Care Management Inc, Preferred Stock B13.2 — — — (3.6)9.6 — — — — 
Proserv Acquisition LLC, Class A Preferred Units2.2 — — — (1.6)0.6 — — — 1.7 
Total$854.6 $352.5 $(246.3)$(170.2)$81.6 $872.2 $6.4 $39.2 $2.1 $30.6 
[17] Asset is on non-accrual status.
[18] Security held within CCT Holdings II LLC, a wholly-owned subsidiary of the Company.
[19] Security held within FSIC II Investments, Inc., a wholly-owned subsidiary of the Company.
[20] Security held within CCT Holdings II LLC, a wholly-owned subsidiary of the Company.
[21] Security held within FSIC II Investments, Inc., a wholly-owned subsidiary of the Company.
[22] Security or portion thereof held within Race Street Funding LLC. Security is available as collateral to support the amounts outstanding under the Senior Secured Revolving Credit Facility (see Note 9).
[23] Security or portion thereof held within Race Street Funding LLC and is pledged as collateral supporting the amounts outstanding under the Senior Secured Revolving Credit Facility (see Note 9).
[24] Security is classified as Level 1 or Level 2 in the Company’s fair value hierarchy (see Note 8).
[25] Security held within FSIC Investments, Inc., a wholly-owned subsidiary of the Company.
[26] Security or portion thereof held within Cobbs Creek LLC and is pledged as collateral supporting the amounts outstanding under the Senior Secured Revolving Credit Facility (see Note 9).
[27] Security or portion thereof held within Cobbs Creek LLC and is pledged as collateral supporting the amounts outstanding under the Senior Secured Revolving Credit Facility.
[28] Security is an unfunded commitment. Reflects the stated spread at the time of commitment, but may not be the actual rate received upon funding.
[29] Security or portion thereof held within CCT Tokyo Funding LLC and is pledged as collateral supporting the amounts outstanding under the revolving credit facility with Sumitomo Mitsui Banking Corporation (see Note 9).
[30] Security held within IC Northern Investments, LLC, a wholly-owned subsidiary of the Company.
[31] Security held within FSIC Investments, Inc., a wholly-owned subsidiary of the Company.