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Unaudited Consolidated Schedule of Investments
€ in Millions, £ in Millions, kr in Millions, kr in Millions, $ in Millions
Sep. 30, 2022
USD ($)
shares
Sep. 30, 2022
SEK (kr)
shares
Sep. 30, 2022
ISK (kr)
shares
Sep. 30, 2022
EUR (€)
shares
Sep. 30, 2022
GBP (£)
shares
Sep. 30, 2022
AUD ($)
shares
Jun. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2021
SEK (kr)
shares
Dec. 31, 2021
ISK (kr)
shares
Dec. 31, 2021
EUR (€)
shares
Dec. 31, 2021
GBP (£)
shares
Dec. 31, 2021
AUD ($)
shares
Sep. 30, 2021
USD ($)
Jun. 30, 2021
USD ($)
Dec. 31, 2020
USD ($)
Amortized Cost $ (16,677,700,000) [1]             $ (16,056,700,000) [2]                
Fair Value $ (15,791,800,000) [1]             (16,101,000,000)                
Liabilities in excess of other assets percentage [1] 120.60% 120.60% 120.60% 120.60% 120.60% 120.60%                    
Non Investment Assets Less Non Investment Liabilities $ 8,631,800,000 [3]             8,371,500,000 [4]                
Net assets, end of period $ 7,160,000,000 [3]           $ 7,487,000,000 7,730,000,000           $ 7,736,000,000 $ 7,653,000,000 $ 3,096,000,000
Net Assets [4]               7,730,000,000                
Percent of net assets [1] 220.60% 220.60% 220.60% 220.60% 220.60% 220.60%                    
Previously Reported                                
Fair Value [2]               (16,101,500,000)                
Senior Secured Loans - First Lien                                
Amortized Cost $ (10,023,000,000)             (9,695,100,000)                
Fair Value $ (9,780,500,000) [3]             $ (9,765,000,000)                
Percent of net assets 136.60% [1] 136.60% [1] 136.60% [1] 136.60% [1] 136.60% [1] 136.60% [1]   126.30% [2] 126.30% [2] 126.30% [2] 126.30% [2] 126.30% [2] 126.30% [2]      
Senior Secured Loans - First Lien | Previously Reported                                
Fair Value [4]               $ (9,765,700,000)                
Funded - Senior Secured Loans -First Lien                                
Amortized Cost $ (10,961,600,000)             (11,165,500,000)                
Fair Value (10,719,100,000) [3]             (11,236,100,000) [4]                
Unfunded - Senior Secured Loans - First Lien                                
Amortized Cost (938,600,000)             (1,470,400,000)                
Fair Value (938,600,000) [3]             (1,470,400,000) [4]                
Senior Secured Loans—Second Lien                                
Amortized Cost (1,357,400,000)             (1,564,400,000)                
Fair Value $ (1,244,500,000) [3]             $ (1,556,500,000) [4]                
Percent of net assets 17.40% [1] 17.40% [1] 17.40% [1] 17.40% [1] 17.40% [1] 17.40% [1]   20.10% [2] 20.10% [2] 20.10% [2] 20.10% [2] 20.10% [2] 20.10% [2]      
Funded - Senior Secured Loans - Second Lien                                
Amortized Cost $ (1,360,500,000)             $ (1,571,600,000)                
Fair Value (1,247,600,000) [3]             (1,563,700,000) [4]                
Unfunded - Senior Secured Loans - Second Lien                                
Amortized Cost (3,100,000)             (7,200,000)                
Fair Value (3,100,000) [3]             (7,200,000) [4]                
Other Senior Secured Debt                                
Amortized Cost (150,700,000)             (148,600,000)                
Fair Value $ (110,400,000) [3]             $ (119,700,000) [4]                
Percent of net assets 1.50% [1] 1.50% [1] 1.50% [1] 1.50% [1] 1.50% [1] 1.50% [1]   1.60% [2] 1.60% [2] 1.60% [2] 1.60% [2] 1.60% [2] 1.60% [2]      
Subordinated Debt                                
Amortized Cost $ (379,800,000)             $ (188,300,000)                
Fair Value $ (255,300,000) [3]             $ (111,300,000) [4]                
Percent of net assets 3.60% [1] 3.60% [1] 3.60% [1] 3.60% [1] 3.60% [1] 3.60% [1]   1.40% [2] 1.40% [2] 1.40% [2] 1.40% [2] 1.40% [2] 1.40% [2]      
Asset Based Finance                                
Amortized Cost $ (1,941,800,000)             $ (2,132,000,000)                
Fair Value $ (1,825,700,000) [3]             $ (2,245,000,000) [4]                
Percent of net assets 25.50% [1] 25.50% [1] 25.50% [1] 25.50% [1] 25.50% [1] 25.50% [1]   29.10% [2] 29.10% [2] 29.10% [2] 29.10% [2] 29.10% [2] 29.10% [2]      
Funded - Asset Based Finance                                
Amortized Cost $ (2,044,400,000)             $ (2,380,900,000)                
Fair Value (1,928,300,000) [3]             (2,493,900,000) [4]                
Unfunded - Asset Based Finance                                
Amortized Cost (102,600,000)             (248,900,000)                
Fair Value (102,600,000) [3]             (248,900,000) [4]                
Credit Opportunities Partners JV, LLC                                
Amortized Cost (1,571,700,000)             (1,396,700,000)                
Fair Value $ (1,466,100,000) [3]             $ (1,396,200,000) [4]                
Percent of net assets 20.50% [1] 20.50% [1] 20.50% [1] 20.50% [1] 20.50% [1] 20.50% [1]   18.10% 18.10% 18.10% 18.10% 18.10% 18.10%      
Equity/Other                                
Amortized Cost $ (1,253,300,000) [5]             $ (931,600,000) [6]                
Fair Value $ (1,109,300,000) [5]             $ (907,100,000) [6]                
Percent of net assets 15.50% [1] 15.50% [1] 15.50% [1] 15.50% [1] 15.50% [1] 15.50% [1]   11.70% [2] 11.70% [2] 11.70% [2] 11.70% [2] 11.70% [2] 11.70% [2]      
Investment, Identifier [Axis]: , Asset Based Finance,                                
Interest rate, paid in kind [7],[8],[9],[10],[11] 15.00% 15.00% 15.00% 15.00% 15.00% 15.00%                    
Investment, Identifier [Axis]: , Asset Based Finance, | Maximum                                
Interest rate, paid in kind [7],[8],[9],[10],[11] 15.00% 15.00% 15.00% 15.00% 15.00% 15.00%                    
Investment, Identifier [Axis]: 3Pillar Global Inc, Senior Secured Loans - First Lien, Software & Services 1                                
Variable rate [7],[12],[13],[14] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[12],[13],[14] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [8],[12],[13],[14],[15] $ 95,500,000                              
Amortized Cost [8],[13],[14] (94,700,000)                              
Fair Value [3],[8],[13],[14] $ (92,900,000)                              
Investment, Identifier [Axis]: 3Pillar Global Inc, Senior Secured Loans—First Lien, Revolving Credit Facility, Software & Services, November, 23 2026                                
Variable rate [16],[17]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 9,200,000                
Amortized Cost [17]               (9,200,000)                
Fair Value [4],[17]               $ (9,100,000)                
Investment, Identifier [Axis]: 3Pillar Global Inc, Senior Secured Loans—First Lien, Revolving Credit Facility, Software & Services, November, 23 2027 - 1                                
Variable rate [16],[19],[20],[21]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [19],[20],[21]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[19],[20],[21]               $ 96,300,000                
Amortized Cost [19],[20],[21]               (95,300,000)                
Fair Value [4],[19],[20],[21]               $ (95,300,000)                
Investment, Identifier [Axis]: 3Pillar Global Inc, Senior Secured Loans—First Lien, Revolving Credit Facility, Software & Services, November, 23 2027 - 2                                
Variable rate [16],[17]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 30,600,000                
Amortized Cost [17]               (30,600,000)                
Fair Value [4],[17]               $ (30,200,000)                
Investment, Identifier [Axis]: 3pillar Global Inc, Senior Secured Loans - First Lien, Software & Services 2                                
Variable rate [7],[10] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 5,700,000                              
Amortized Cost [10] (5,700,000)                              
Fair Value [3],[10] $ (5,500,000)                              
Investment, Identifier [Axis]: 3pillar Global Inc, Senior Secured Loans - First Lien, Software & Services 3                                
Variable rate [7],[22] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 9,200,000                              
Amortized Cost [22] (9,200,000)                              
Fair Value [3],[22] $ (8,900,000)                              
Investment, Identifier [Axis]: 3pillar Global Inc, Senior Secured Loans - First Lien, Software & Services 4                                
Variable rate [7],[22] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 24,900,000                              
Amortized Cost [22] (24,900,000)                              
Fair Value [3],[22] $ (24,200,000)                              
Investment, Identifier [Axis]: 48Forty Solutions LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 1                                
Variable rate [7],[10],[13],[14],[23],[24] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[10],[13],[14],[23],[24] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[13],[14],[15],[23],[24] $ 183,200,000                              
Amortized Cost [10],[13],[14],[23],[24] (181,500,000)                              
Fair Value [3],[10],[13],[14],[23],[24] $ (179,100,000)                              
Investment, Identifier [Axis]: 48Forty Solutions LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 2                                
Variable rate [7],[10] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 7,400,000                              
Amortized Cost [10] (7,400,000)                              
Fair Value [3],[10] $ (7,300,000)                              
Investment, Identifier [Axis]: 48Forty Solutions LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 3                                
Variable rate [7],[22] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 3,200,000                              
Amortized Cost [22] (3,200,000)                              
Fair Value [3],[22] $ (3,100,000)                              
Investment, Identifier [Axis]: 5 Arch Income Fund 2 LLC                                
Investment interest rate [16],[25],[26],[27],[28],[29]               9.00% 9.00% 9.00% 9.00% 9.00% 9.00%      
Principal amount [18],[25],[26],[27],[28],[29]               $ 111,100,000                
Amortized Cost [25],[26],[27],[28],[29]               (81,300,000)                
Fair Value [4],[25],[26],[27],[28],[29]               $ (78,300,000)                
Investment, Identifier [Axis]: 5 Arch Income Fund 2 LLC, Senior Secured Loans - First Lien, Diversified Financials                                
Investment interest rate [7],[11],[30],[31],[32],[33] 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%                    
Principal amount [11],[15],[30],[31],[32],[33] $ 97,500,000                              
Amortized Cost [11],[30],[31],[32],[33] (71,400,000)                              
Fair Value [3],[11],[30],[31],[32],[33] $ (62,400,000)                              
Investment, Identifier [Axis]: 801 5th Ave, Seattle, Private Equity                                
Number of Shares | shares [28],[29],[34],[35]               8,554,983 8,554,983 8,554,983 8,554,983 8,554,983 8,554,983      
Amortized Cost [28],[29],[34],[35]               $ (14,100,000)                
Fair Value [4],[28],[29],[34],[35]               $ (23,100,000)                
Investment, Identifier [Axis]: 801 5th Ave, Seattle, Private Equity, Asset Based Finance, Real Estate                                
Number of Shares | shares [10],[11],[33],[36] 8,554,983 8,554,983 8,554,983 8,554,983 8,554,983 8,554,983                    
Amortized Cost [10],[11],[33],[36] $ (14,100,000)                              
Fair Value [3],[10],[11],[33],[36] $ (14,300,000)                              
Investment, Identifier [Axis]: 801 5th Ave, Seattle, Structure Mezzanine                                
Variable rate [16],[29],[34],[35]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00%      
Interest rate, paid in kind [16],[29],[34],[35]               3.00% 3.00% 3.00% 3.00% 3.00% 3.00%      
Principal amount [29],[34],[35]               $ 57,200,000                
Amortized Cost [29],[34],[35]               (55,100,000)                
Fair Value [4],[29],[34],[35]               $ (57,200,000)                
Investment, Identifier [Axis]: 801 5th Ave, Seattle, Structure Mezzanine | Maximum                                
Interest rate, paid in kind [16],[29],[34],[35]               3.00% 3.00% 3.00% 3.00% 3.00% 3.00%      
Investment, Identifier [Axis]: 801 5th Ave, Seattle, Structure Mezzanine, Asset Based Finance, Real Estate                                
Variable rate [7],[10],[11],[36] 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%                    
Interest rate, paid in kind [7],[10],[11],[36] 3.00% 3.00% 3.00% 3.00% 3.00% 3.00%                    
Principal amount [10],[11],[15],[36] $ 57,200,000                              
Amortized Cost [10],[11],[36] (55,300,000)                              
Fair Value [3],[10],[11],[36] $ (57,200,000)                              
Investment, Identifier [Axis]: 801 5th Ave, Seattle, Structure Mezzanine, Asset Based Finance, Real Estate | Maximum                                
Interest rate, paid in kind [7],[10],[11],[36] 3.00% 3.00% 3.00% 3.00% 3.00% 3.00%                    
Investment, Identifier [Axis]: ATX Networks Corp                                
Principal amount [18],[25],[28],[29],[34],[35],[37]               $ 18,300,000                
Amortized Cost [25],[28],[29],[34],[35],[37]               (4,800,000)                
Fair Value [4],[25],[28],[29],[34],[35],[37]               $ (7,100,000)                
Investment, Identifier [Axis]: ATX Networks Corp | Maximum                                
Interest rate, paid in kind [16],[25],[28],[29],[34],[35],[37]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00%      
Investment, Identifier [Axis]: ATX Networks Corp 1                                
Interest rate, paid in kind [16],[29],[34],[35],[37]               7.50% 7.50% 7.50% 7.50% 7.50% 7.50%      
Base Rate Floor [29],[34],[35],[37]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[29],[34],[35],[37]               $ 46,800,000                
Amortized Cost [29],[34],[35],[37]               (46,800,000)                
Fair Value [4],[29],[34],[35],[37]               $ (46,800,000)                
Investment, Identifier [Axis]: ATX Networks Corp 1 | Maximum                                
Interest rate, paid in kind [16],[29],[34],[35],[37]               7.50% 7.50% 7.50% 7.50% 7.50% 7.50%      
Investment, Identifier [Axis]: ATX Networks Corp, Common Stock                                
Number of Shares | shares [28],[29],[34],[35],[37]               3,483 3,483 3,483 3,483 3,483 3,483      
Amortized Cost [28],[29],[34],[35],[37]               $ 0                
Fair Value [4],[28],[29],[34],[35],[37]               $ 0                
Investment, Identifier [Axis]: ATX Networks Corp, Common Stock, Equity/Other, Capital Goods                                
Number of Shares | shares [10],[11],[33],[36],[38],[39] 3,773 3,773 3,773 3,773 3,773 3,773                    
Amortized Cost [10],[11],[33],[36],[38],[39] $ 0                              
Fair Value [3],[10],[11],[33],[36],[38],[39] $ 0                              
Investment, Identifier [Axis]: ATX Networks Corp, Senior Secured Loans - First Lien, Capital Goods                                
Variable rate [7],[10],[11],[36],[39] 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%                    
Base Rate Floor [7],[10],[11],[36],[39] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[11],[15],[36],[39] $ 41,100,000                              
Amortized Cost [10],[11],[36],[39] (41,100,000)                              
Fair Value [3],[10],[11],[36],[39] $ (41,100,000)                              
Investment, Identifier [Axis]: ATX Networks Corp, Subordinated Debt, Capital Goods                                
Interest rate, paid in kind [7],[10],[11],[36],[38],[39] 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%                    
Principal amount [10],[11],[15],[36],[38],[39] $ 21,800,000                              
Amortized Cost [10],[11],[36],[38],[39] (8,100,000)                              
Fair Value [3],[10],[11],[36],[38],[39] $ (16,600,000)                              
Investment, Identifier [Axis]: ATX Networks Corp, Subordinated Debt, Capital Goods | Maximum                                
Interest rate, paid in kind [7],[10],[11],[36],[38],[39] 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%                    
Investment, Identifier [Axis]: AVF Parent LLC, Trade Claim                                
Number of Shares | shares [28],[35]               44,507 44,507 44,507 44,507 44,507 44,507      
Amortized Cost [28],[35]               $ 0                
Fair Value [4],[28],[35]               $ 0                
Investment, Identifier [Axis]: AVF Parent LLC, Trade Claim, Equity/Other, Retailing                                
Number of Shares | shares [10],[33] 44,507 44,507 44,507 44,507 44,507 44,507                    
Amortized Cost [10],[33] $ 0                              
Fair Value [3],[10],[33] $ 0                              
Investment, Identifier [Axis]: Abaco Energy Technologies LLC, Common Stock                                
Number of Shares | shares [28],[35]               3,055,556 3,055,556 3,055,556 3,055,556 3,055,556 3,055,556      
Amortized Cost [28],[35]               $ (200,000)                
Fair Value [4],[28],[35]               $ (300,000)                
Investment, Identifier [Axis]: Abaco Energy Technologies LLC, Common Stock, Equity/Other, Energy                                
Number of Shares | shares [10],[33] 3,055,556 3,055,556 3,055,556 3,055,556 3,055,556 3,055,556                    
Amortized Cost [10],[33] $ (200,000)                              
Fair Value [3],[10],[33] $ (400,000)                              
Investment, Identifier [Axis]: Abaco Energy Technologies LLC, Preferred Stock                                
Number of Shares | shares [28],[35]               12,734,481 12,734,481 12,734,481 12,734,481 12,734,481 12,734,481      
Amortized Cost [28],[35]               $ (1,500,000)                
Fair Value [4],[28],[35]               $ (1,700,000)                
Investment, Identifier [Axis]: Abaco Energy Technologies LLC, Preferred Stock, Equity/Other, Energy                                
Number of Shares | shares [10],[33] 12,734,481 12,734,481 12,734,481 12,734,481 12,734,481 12,734,481                    
Amortized Cost [10],[33] $ (1,500,000)                              
Fair Value [3],[10],[33] $ (2,500,000)                              
Investment, Identifier [Axis]: Abacus JV, Private Equity                                
Number of Shares | shares [29],[35]               44,833,382 44,833,382 44,833,382 44,833,382 44,833,382 44,833,382      
Amortized Cost [29],[35]               $ (43,800,000)                
Fair Value [4],[29],[35]               $ (48,100,000)                
Investment, Identifier [Axis]: Abacus JV, Private Equity, Asset Based Finance, Insurance                                
Number of Shares | shares [10],[11] 49,223,047 49,223,047 49,223,047 49,223,047 49,223,047 49,223,047                    
Amortized Cost [10],[11] $ (48,200,000)                              
Fair Value [3],[10],[11] $ (52,300,000)                              
Investment, Identifier [Axis]: Accelerator Investments Aggregator LP, Private Equity                                
Number of Shares | shares [28],[29],[35]               5,397,365 5,397,365 5,397,365 5,397,365 5,397,365 5,397,365      
Amortized Cost [28],[29],[35]               $ (6,300,000)                
Fair Value [4],[28],[29],[35]               $ (4,700,000)                
Investment, Identifier [Axis]: Accelerator Investments Aggregator LP, Private Equity, Asset Based Finance, Diversified Financials                                
Number of Shares | shares [10],[11],[33] 3,869,291 3,869,291 3,869,291 3,869,291 3,869,291 3,869,291                    
Amortized Cost [10],[11],[33] $ (4,500,000)                              
Fair Value [3],[10],[11],[33] $ (3,000,000.0)                              
Investment, Identifier [Axis]: Accuride Corp                                
Variable rate [16],[28],[40]               5.25% 5.25% 5.25% 5.25% 5.25% 5.25%      
Base Rate Floor [20],[40]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[20],[40]               $ 9,000,000.0                
Amortized Cost [20],[40]               (8,100,000)                
Fair Value [4],[20],[40]               $ (8,700,000)                
Investment, Identifier [Axis]: Accuride Corp, Senior Secured Loans - First Lien 1, Capital Goods                                
Variable rate [7],[14],[41] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                    
Base Rate Floor [7],[14],[41] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [14],[15],[41] $ 8,900,000                              
Amortized Cost [14],[41] (8,400,000)                              
Fair Value [3],[14],[41] $ (7,700,000)                              
Investment, Identifier [Axis]: Advanced Dermatology & Cosmetic Surgery ,Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing May, 7 2026                                
Variable rate [16],[17]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 3,600,000                
Amortized Cost [17]               (3,600,000)                
Fair Value [4],[17]               $ (3,600,000)                
Investment, Identifier [Axis]: Advanced Dermatology & Cosmetic Surgery ,Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing May, 7 2027 - 1                                
Variable rate [16],[35],[42],[43]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [35],[42],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[42],[43]               $ 44,800,000                
Amortized Cost [35],[42],[43]               (42,900,000)                
Fair Value [4],[35],[42],[43]               $ (45,000,000.0)                
Investment, Identifier [Axis]: Advanced Dermatology & Cosmetic Surgery ,Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing May, 7 2027- 2                                
Variable rate [16],[17]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 4,200,000                
Amortized Cost [17]               (4,200,000)                
Fair Value [4],[17]               $ (4,200,000)                
Investment, Identifier [Axis]: Advanced Dermatology & Cosmetic Surgery, Senior Secured Loans - First Lien, Health Care Equipment & Services 3                                
Variable rate [7],[22] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 3,600,000                              
Amortized Cost [22] (3,600,000)                              
Fair Value [3],[22] $ (3,500,000)                              
Investment, Identifier [Axis]: Advanced Dermatology & Cosmetic Surgery, Senior Secured Loans - First Lien, Health Care Equipment & Services 1                                
Variable rate [7],[10],[24],[44] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                    
Base Rate Floor [7],[10],[24],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[24],[44] $ 38,600,000                              
Amortized Cost [10],[24],[44] (36,900,000)                              
Fair Value [3],[10],[24],[44] $ (38,300,000)                              
Investment, Identifier [Axis]: Advanced Dermatology & Cosmetic Surgery, Senior Secured Loans - First Lien, Health Care Equipment & Services 2                                
Variable rate [7],[10] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 7,900,000                              
Amortized Cost [10] (7,900,000)                              
Fair Value [3],[10] $ (7,800,000)                              
Investment, Identifier [Axis]: Advanced Dermatology & Cosmetic Surgery, Senior Secured Loans - First Lien, Health Care Equipment & Services 4                                
Variable rate [7],[22] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 2,200,000                              
Amortized Cost [22] (2,200,000)                              
Fair Value [3],[22] $ (2,200,000)                              
Investment, Identifier [Axis]: Advanced Lighting Technologies Inc, Senior Secured Loans -Second Lien, Materials                                
Variable rate [7],[10],[30],[33] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Interest rate, paid in kind [7],[10],[30],[33] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Base Rate Floor [7],[10],[30],[33] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[30],[33] $ 12,800,000                              
Amortized Cost [10],[30],[33] (10,500,000)                              
Fair Value [3],[10],[30],[33] $ (3,200,000)                              
Investment, Identifier [Axis]: Advanced Lighting Technologies Inc, Senior Secured Loans -Second Lien, Materials | Maximum                                
Interest rate, paid in kind [7],[10],[30],[33] 16.00% 16.00% 16.00% 16.00% 16.00% 16.00%                    
Investment, Identifier [Axis]: Advanced Lighting Technologies Inc, Senior Secured Loans, Second Lien                                
Variable rate [16],[25],[28],[35]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [25],[28],[35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[25],[28],[35]               $ 11,300,000                
Amortized Cost [25],[28],[35]               (10,500,000)                
Fair Value [4],[25],[28],[35]               $ (6,400,000)                
Investment, Identifier [Axis]: Advania Sverige AB, Senior Secured Loans - First Lien, Software & Services 1                                
Variable rate [7],[10],[11] 6.10% 6.10% 6.10% 6.10% 6.10% 6.10%                    
Interest rate, paid in kind [7],[10],[11] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Base Rate Floor [7],[10],[11] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount | kr [10],[11],[15]   kr 933.6                            
Amortized Cost [10],[11] $ (105,900,000)                              
Fair Value [3],[10],[11] $ (81,200,000)                              
Investment, Identifier [Axis]: Advania Sverige AB, Senior Secured Loans - First Lien, Software & Services 1 | Maximum                                
Interest rate, paid in kind [7],[10],[11] 3.30% 3.30% 3.30% 3.30% 3.30% 3.30%                    
Investment, Identifier [Axis]: Advania Sverige AB, Senior Secured Loans - First Lien, Software & Services 2                                
Variable rate [7],[10],[11] 6.10% 6.10% 6.10% 6.10% 6.10% 6.10%                    
Interest rate, paid in kind [7],[10],[11] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Base Rate Floor [7],[10],[11] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount | kr [10],[11],[15]     kr 1,345.8                          
Amortized Cost [10],[11] $ (10,100,000)                              
Fair Value [3],[10],[11] $ (9,100,000)                              
Investment, Identifier [Axis]: Advania Sverige AB, Senior Secured Loans - First Lien, Software & Services 2 | Maximum                                
Interest rate, paid in kind [7],[10],[11] 3.30% 3.30% 3.30% 3.30% 3.30% 3.30%                    
Investment, Identifier [Axis]: Advania Sverige AB, Senior Secured Loans—First Lien, Software & Services, April 28, 2028 - 1                                
Variable rate [16],[29],[35]               6.10% 6.10% 6.10% 6.10% 6.10% 6.10%      
Interest rate, paid in kind [16],[29],[35]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Base Rate Floor [29],[35]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Principal amount | kr [18],[29],[35]                 kr 629.4              
Amortized Cost [29],[35]               $ (67,900,000)                
Fair Value [4],[29],[35]               $ (68,900,000)                
Investment, Identifier [Axis]: Advania Sverige AB, Senior Secured Loans—First Lien, Software & Services, April 28, 2028 - 1 | Maximum                                
Interest rate, paid in kind [16],[29],[35]               3.30% 3.30% 3.30% 3.30% 3.30% 3.30%      
Investment, Identifier [Axis]: Advania Sverige AB, Senior Secured Loans—First Lien, Software & Services, April 28, 2028 -2                                
Variable rate [16],[29],[35]               6.10% 6.10% 6.10% 6.10% 6.10% 6.10%      
Interest rate, paid in kind [16],[29],[35]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Base Rate Floor [29],[35]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Principal amount | kr [18],[29],[35]                   kr 1,345.8            
Amortized Cost [29],[35]               $ (10,000,000.0)                
Fair Value [4],[29],[35]               $ (10,300,000)                
Investment, Identifier [Axis]: Advania Sverige AB, Senior Secured Loans—First Lien, Software & Services, April 28, 2028 -2 | Maximum                                
Interest rate, paid in kind [16],[29],[35]               3.30% 3.30% 3.30% 3.30% 3.30% 3.30%      
Investment, Identifier [Axis]: Advania Sverige AB, Senior Secured Loans—First Lien, Software & Services, April 28, 2028 -3                                
Variable rate [16],[17],[29]               6.10% 6.10% 6.10% 6.10% 6.10% 6.10%      
Interest rate, paid in kind [16],[17],[29]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Base Rate Floor [17],[29]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Principal amount | kr [17],[18],[29]                 kr 304.1              
Amortized Cost [17],[29]               $ (37,500,000)                
Fair Value [4],[17],[29]               $ (37,200,000)                
Investment, Identifier [Axis]: Advania Sverige AB, Senior Secured Loans—First Lien, Software & Services, April 28, 2028 -3 | Maximum                                
Interest rate, paid in kind [16],[17],[29]               3.30% 3.30% 3.30% 3.30% 3.30% 3.30%      
Investment, Identifier [Axis]: Affordable Care Inc, Preferred Stock                                
Interest rate, paid in kind [16],[35],[45]               11.80% 11.80% 11.80% 11.80% 11.80% 11.80%      
Number of Shares | shares [35],[45]               49,073,000 49,073,000 49,073,000 49,073,000 49,073,000 49,073,000      
Amortized Cost [35],[45]               $ (48,100,000)                
Fair Value [4],[35],[45]               $ (52,100,000)                
Investment, Identifier [Axis]: Affordable Care Inc, Preferred Stock | Maximum                                
Interest rate, paid in kind [16],[35],[45]               11.80% 11.80% 11.80% 11.80% 11.80% 11.80%      
Investment, Identifier [Axis]: Affordable Care Inc, Preferred Stock, Equity/Other, Health Care Equipment & Services                                
Interest rate, paid in kind [7],[10],[46] 11.80% 11.80% 11.80% 11.80% 11.80% 11.80%                    
Number of Shares | shares [10],[46] 49,073,000 49,073,000 49,073,000 49,073,000 49,073,000 49,073,000                    
Amortized Cost [10],[46] $ (48,100,000)                              
Fair Value [3],[10],[46] $ (50,000,000.0)                              
Investment, Identifier [Axis]: Affordable Care Inc, Preferred Stock, Equity/Other, Health Care Equipment & Services | Maximum                                
Interest rate, paid in kind [7],[10],[46] 11.80% 11.80% 11.80% 11.80% 11.80% 11.80%                    
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 1                                
Variable rate [7],[10],[44],[46] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Interest rate, paid in kind [7],[10],[44],[46] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Base Rate Floor [7],[10],[44],[46] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15],[44],[46] $ 38,800,000                              
Amortized Cost [10],[44],[46] (38,400,000)                              
Fair Value [3],[10],[44],[46] $ (38,300,000)                              
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 1 | Maximum                                
Interest rate, paid in kind [7],[10],[44],[46] 1.30% 1.30% 1.30% 1.30% 1.30% 1.30%                    
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 2                                
Variable rate [7],[10],[46] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Interest rate, paid in kind [7],[10],[46] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Base Rate Floor [7],[10],[46] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15],[46] $ 10,300,000                              
Amortized Cost [10],[46] (10,300,000)                              
Fair Value [3],[10],[46] $ (10,200,000)                              
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 2 | Maximum                                
Interest rate, paid in kind [7],[10],[46] 1.30% 1.30% 1.30% 1.30% 1.30% 1.30%                    
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 3                                
Variable rate [7],[22],[46] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Interest rate, paid in kind [7],[22],[46] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Base Rate Floor [7],[22],[46] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22],[46] $ 12,800,000                              
Amortized Cost [22],[46] (12,800,000)                              
Fair Value [3],[22],[46] $ (12,700,000)                              
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 3 | Maximum                                
Interest rate, paid in kind [7],[22],[46] 1.30% 1.30% 1.30% 1.30% 1.30% 1.30%                    
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 4                                
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 33,200,000                              
Amortized Cost [22] (33,200,000)                              
Fair Value [3],[22] $ (32,800,000)                              
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing August 2, 2027                                
Variable rate [16],[17],[45]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Interest rate, paid in kind [16],[17],[45]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Base Rate Floor [17],[45]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18],[45]               $ 12,800,000                
Amortized Cost [17],[45]               (12,800,000)                
Fair Value [4],[17],[45]               $ (12,800,000)                
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing August 2, 2027 | Maximum                                
Interest rate, paid in kind [16],[17],[45]               1.30% 1.30% 1.30% 1.30% 1.30% 1.30%      
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing August 2, 2028 -1                                
Variable rate [16],[35],[45]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Interest rate, paid in kind [16],[35],[45]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Base Rate Floor [35],[45]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[35],[45]               $ 60,400,000                
Amortized Cost [35],[45]               (59,900,000)                
Fair Value [4],[35],[45]               $ (60,100,000)                
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing August 2, 2028 -1 | Maximum                                
Interest rate, paid in kind [16],[35],[45]               1.30% 1.30% 1.30% 1.30% 1.30% 1.30%      
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing August 2, 2028 -2                                
Variable rate [16],[17],[45]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Interest rate, paid in kind [16],[17],[45]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Base Rate Floor [17],[45]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18],[45]               $ 43,100,000                
Amortized Cost [17],[45]               (43,100,000)                
Fair Value [4],[17],[45]               $ (42,900,000)                
Investment, Identifier [Axis]: Affordable Care Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing August 2, 2028 -2 | Maximum                                
Interest rate, paid in kind [16],[17],[45]               1.30% 1.30% 1.30% 1.30% 1.30% 1.30%      
Investment, Identifier [Axis]: Alacrity Solutions Group LLC, Senior Secured Loans—First Lien, Insurance, Maturing December 22, 2027 -1                                
Variable rate [16],[35]               5.25% 5.25% 5.25% 5.25% 5.25% 5.25%      
Base Rate Floor [35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[35]               $ 1,100,000                
Amortized Cost [35]               (900,000)                
Fair Value [4],[35]               $ (1,100,000)                
Investment, Identifier [Axis]: Alacrity Solutions Group LLC, Senior Secured Loans—First Lien, Insurance, Maturing December 22, 2027-2                                
Variable rate [16],[17]               5.25% 5.25% 5.25% 5.25% 5.25% 5.25%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 9,700,000                
Amortized Cost [17]               (9,700,000)                
Fair Value [4],[17]               $ (9,500,000)                
Investment, Identifier [Axis]: Alacrity Solutions Group LLC, Senior Secured Loans—First Lien, Insurance, Maturing December 22, 2028                                
Variable rate [16],[35]               5.25% 5.25% 5.25% 5.25% 5.25% 5.25%      
Base Rate Floor [35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[35]               $ 69,200,000                
Amortized Cost [35]               (68,200,000)                
Fair Value [4],[35]               $ (68,200,000)                
Investment, Identifier [Axis]: Alacrity Solutions Group LLC, , Senior Secured Loans - First Lien, Insurance 3                                
Variable rate [7],[22] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 7,700,000                              
Amortized Cost [22] (7,700,000)                              
Fair Value [3],[22] $ (7,400,000)                              
Investment, Identifier [Axis]: Alacrity Solutions Group LLC, Senior Secured Loans - First Lien, Insurance 1                                
Variable rate [7],[10] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 3,100,000                              
Amortized Cost [10] (3,000,000.0)                              
Fair Value [3],[10] $ (3,000,000.0)                              
Investment, Identifier [Axis]: Alacrity Solutions Group LLC, Senior Secured Loans - First Lien, Insurance 2                                
Variable rate [7],[10] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 28,400,000                              
Amortized Cost [10] (28,000,000.0)                              
Fair Value [3],[10] $ (27,600,000)                              
Investment, Identifier [Axis]: Alera Group Intermediate Holdings Inc, Alacrity Solutions Group LLC, Senior Secured Loans—First Lien, Insurance, Maturing October 2, 2028 -1                                
Variable rate [16],[35]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[35]               $ 21,400,000                
Amortized Cost [35]               (21,200,000)                
Fair Value [4],[35]               $ (21,200,000)                
Investment, Identifier [Axis]: Alera Group Intermediate Holdings Inc, Alacrity Solutions Group LLC, Senior Secured Loans—First Lien, Insurance, Maturing October 2, 2028 -2                                
Variable rate [16],[17]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 22,900,000                
Amortized Cost [17]               (22,900,000)                
Fair Value [4],[17]               $ (22,700,000)                
Investment, Identifier [Axis]: Alera Group Intermediate Holdings Inc, Senior Secured Loans - First Lien, Insurance 1                                
Variable rate [7],[10] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 9,200,000                              
Amortized Cost [10] (9,100,000)                              
Fair Value [3],[10] $ (8,800,000)                              
Investment, Identifier [Axis]: Alera Group Intermediate Holdings Inc, Senior Secured Loans - First Lien, Insurance 2                                
Variable rate [7],[10] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 17,000,000.0                              
Amortized Cost [10] (17,000,000.0)                              
Fair Value [3],[10] $ (16,400,000)                              
Investment, Identifier [Axis]: Alera Group Intermediate Holdings Inc, Senior Secured Loans - First Lien, Insurance 3                                
Variable rate [7],[22] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 5,600,000                              
Amortized Cost [22] (5,600,000)                              
Fair Value [3],[22] $ (5,400,000)                              
Investment, Identifier [Axis]: Altavair AirFinance, Private Equity                                
Number of Shares | shares [29],[35]               94,679,609 94,679,609 94,679,609 94,679,609 94,679,609 94,679,609      
Amortized Cost [29],[35]               $ (95,600,000)                
Fair Value [4],[29],[35]               $ (114,300,000)                
Investment, Identifier [Axis]: Altavair AirFinance, Private Equity, Asset Based Finance, Capital Goods                                
Number of Shares | shares [10],[11] 118,783,852 118,783,852 118,783,852 118,783,852 118,783,852 118,783,852                    
Amortized Cost [10],[11] $ (119,700,000)                              
Fair Value [3],[10],[11] $ (135,100,000)                              
Investment, Identifier [Axis]: American Vision Partners, Private Equity                                
Number of Shares | shares [28],[35]               2,450,230 2,450,230 2,450,230 2,450,230 2,450,230 2,450,230      
Amortized Cost [28],[35]               $ (2,500,000)                
Fair Value [4],[28],[35]               $ (2,400,000)                
Investment, Identifier [Axis]: American Vision Partners, Private Equity, Equity/Other, Health Care Equipment & Services                                
Number of Shares | shares [10],[33] 2,450,230 2,450,230 2,450,230 2,450,230 2,450,230 2,450,230                    
Amortized Cost [10],[33] $ (2,500,000)                              
Fair Value [3],[10],[33] $ (2,000,000.0)                              
Investment, Identifier [Axis]: American Vision Partners, Senior Secured Loans - First Lien, Health Care Equipment & Services 1                                
Variable rate [7],[10],[12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[10],[12] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[12],[15] $ 74,400,000                              
Amortized Cost [10],[12] (73,800,000)                              
Fair Value [3],[10],[12] $ (72,600,000)                              
Investment, Identifier [Axis]: American Vision Partners, Senior Secured Loans - First Lien, Health Care Equipment & Services 2                                
Variable rate [7],[10] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 38,800,000                              
Amortized Cost [10] (38,800,000)                              
Fair Value [3],[10] $ (37,900,000)                              
Investment, Identifier [Axis]: American Vision Partners, Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing September 30, 2026                                
Variable rate [16],[17]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 7,800,000                
Amortized Cost [17]               (7,800,000)                
Fair Value [4],[17]               $ (7,700,000)                
Investment, Identifier [Axis]: American Vision Partners, Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing September 30, 2027 -1                                
Variable rate [16],[21],[35]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [21],[35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[21],[35]               $ 94,700,000                
Amortized Cost [21],[35]               (93,800,000)                
Fair Value [4],[21],[35]               $ (94,300,000)                
Investment, Identifier [Axis]: American Vision Partners, Senior Secured Loans—First Lien, Health Care Equipment & Services, Maturing September 30, 2027 -2                                
Variable rate [16],[17]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 38,900,000                
Amortized Cost [17]               (38,900,000)                
Fair Value [4],[17]               $ (38,700,000)                
Investment, Identifier [Axis]: American Vision Partners,, Senior Secured Loans - First Lien, Health Care Equipment & Services 3                                
Variable rate [7],[22] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 7,800,000                              
Amortized Cost [22] (7,800,000)                              
Fair Value [3],[22] $ (7,600,000)                              
Investment, Identifier [Axis]: Amerivet Partners Management Inc, Preferred Stock, Equity/Other, Health Care Equipment & Services                                
Interest rate, paid in kind [7],[10] 11.50% 11.50% 11.50% 11.50% 11.50% 11.50%                    
Number of Shares | shares [10] 12,702,290 12,702,290 12,702,290 12,702,290 12,702,290 12,702,290                    
Amortized Cost [10] $ (12,300,000)                              
Fair Value [3],[10] $ (12,100,000)                              
Investment, Identifier [Axis]: Amerivet Partners Management Inc, Preferred Stock, Equity/Other, Health Care Equipment & Services | Maximum                                
Interest rate, paid in kind [7],[10] 11.50% 11.50% 11.50% 11.50% 11.50% 11.50%                    
Investment, Identifier [Axis]: Amerivet Partners Management Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 1                                
Variable rate [7],[10] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 800,000                              
Amortized Cost [10] (800,000)                              
Fair Value [3],[10] $ (800,000)                              
Investment, Identifier [Axis]: Amerivet Partners Management Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 2                                
Variable rate [7],[10] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount | € [10],[15]       € 101.5                        
Amortized Cost [10] $ (100,600,000)                              
Fair Value [3],[10] $ (98,400,000)                              
Investment, Identifier [Axis]: Amerivet Partners Management Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 3                                
Variable rate [7],[22] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount | € [15],[22]       € 7.6                        
Amortized Cost [22] $ (7,600,000)                              
Fair Value [3],[22] $ (7,400,000)                              
Investment, Identifier [Axis]: Amerivet Partners Management Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 4                                
Variable rate [7],[22] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 61,400,000                              
Amortized Cost [22] (61,400,000)                              
Fair Value [3],[22] $ (59,600,000)                              
Investment, Identifier [Axis]: Ammeraal Beltech Holding BV                                
Variable rate [16],[29],[35],[37],[47]               7.75% 7.75% 7.75% 7.75% 7.75% 7.75%      
Base Rate Floor [29],[35],[37],[47]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Principal amount [18],[29],[35],[37],[47]               $ 44,900,000                
Amortized Cost [29],[35],[37],[47]               (40,800,000)                
Fair Value [4],[29],[35],[37],[47]               $ (44,300,000)                
Investment, Identifier [Axis]: Ammeraal Beltech Holding BV, Senior Secured Loans -Second Lien, Capital Goods                                
Variable rate [7],[10],[11],[23],[39] 7.75% 7.75% 7.75% 7.75% 7.75% 7.75%                    
Base Rate Floor [7],[10],[11],[23],[39] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount [10],[11],[15],[23],[39] $ 23,600,000                              
Amortized Cost [10],[11],[23],[39] (21,700,000)                              
Fair Value [3],[10],[11],[23],[39] $ (23,200,000)                              
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd                                
Variable rate [16],[25],[28],[29],[34],[35]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00%      
Base Rate Floor [25],[28],[29],[34],[35]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Principal amount | € [18],[25],[28],[29],[34],[35]                     € 34.7          
Amortized Cost [25],[28],[29],[34],[35]               $ (39,100,000)                
Fair Value [4],[25],[28],[29],[34],[35]               $ 0                
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd | Maximum                                
Variable rate [16],[25],[28],[29],[34],[35]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00%      
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd 1                                
Interest rate, paid in kind [16],[25],[28],[29],[34],[35]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00%      
Base Rate Floor [25],[28],[29],[34],[35]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Principal amount | € [18],[25],[28],[29],[34],[35]                     € 57.2          
Amortized Cost [25],[28],[29],[34],[35]               $ (68,700,000)                
Fair Value [4],[25],[28],[29],[34],[35]               $ (34,800,000)                
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd 1 | Maximum                                
Interest rate, paid in kind [16],[25],[28],[29],[34],[35]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00%      
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Common Stock                                
Number of Shares | shares [28],[29],[34],[35],[48]               7,046,126 7,046,126 7,046,126 7,046,126 7,046,126 7,046,126      
Amortized Cost [28],[29],[34],[35],[48]               $ 0                
Fair Value [4],[28],[29],[34],[35],[48]               $ 0                
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Common Stock, Equity/Other, Automobiles & Components                                
Number of Shares | shares [10],[11],[33],[36],[49] 7,046,126 7,046,126 7,046,126 7,046,126 7,046,126 7,046,126                    
Amortized Cost [10],[11],[33],[36],[49] $ 0                              
Fair Value [3],[10],[11],[33],[36],[49] $ 0                              
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Ordinary Shares                                
Number of Shares | shares [28],[29],[34],[35]               5,735,804,056 5,735,804,056 5,735,804,056 5,735,804,056 5,735,804,056 5,735,804,056      
Amortized Cost [28],[29],[34],[35]               $ (30,700,000)                
Fair Value [4],[28],[29],[34],[35]               $ 0                
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Ordinary Shares, Equity/Other, Automobiles & Components                                
Number of Shares | shares [10],[11],[33],[36] 5,735,804,056 5,735,804,056 5,735,804,056 5,735,804,056 5,735,804,056 5,735,804,056                    
Amortized Cost [10],[11],[33],[36] $ (30,700,000)                              
Fair Value [3],[10],[11],[33],[36] $ 0                              
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Private Equity                                
Number of Shares | shares [28],[29],[34],[35]               4,097 4,097 4,097 4,097 4,097 4,097      
Amortized Cost [28],[29],[34],[35]               $ 0                
Fair Value [4],[28],[29],[34],[35]               $ 0                
Investment, Identifier [Axis]: Amtek Global Technology Pte Ltd, Private Equity, Equity/Other, Automobiles & Components                                
Number of Shares | shares [10],[11],[33],[36] 4,097 4,097 4,097 4,097 4,097 4,097                    
Amortized Cost [10],[11],[33],[36] $ 0                              
Fair Value [3],[10],[11],[33],[36] $ 0                              
Investment, Identifier [Axis]: Angelica Corp                                
Interest rate, paid in kind [16]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00%      
Principal amount [18],[25],[28],[50]               $ 53,400,000                
Amortized Cost [25],[28],[50]               (42,300,000)                
Fair Value [4],[25],[28],[50]               $ (5,200,000)                
Investment, Identifier [Axis]: Angelica Corp | Maximum                                
Interest rate, paid in kind [16],[25],[28],[50]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00%      
Investment, Identifier [Axis]: Angelica Corp, Limited Partnership Interest                                
Number of Shares | shares [28],[50]               877,044 877,044 877,044 877,044 877,044 877,044      
Amortized Cost [28],[50]               $ (47,600,000)                
Fair Value [4],[28],[50]               $ 0                
Investment, Identifier [Axis]: Angelica Corp, Limited Partnership Interest, Equity/Other, Health Care Equipment & Services                                
Number of Shares | shares [33],[51] 877,044 877,044 877,044 877,044 877,044 877,044                    
Amortized Cost [33],[51] $ (47,600,000)                              
Fair Value [3],[33],[51] $ 0                              
Investment, Identifier [Axis]: Angelica Corp, Other Senior Debt, Health Care Equipment & Services                                
Interest rate, paid in kind [7],[30],[33],[51] 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%                    
Principal amount [15],[30],[33],[51] $ 56,100,000                              
Amortized Cost [30],[33],[51] (42,300,000)                              
Fair Value [3],[30],[33],[51] $ (900,000)                              
Investment, Identifier [Axis]: Angelica Corp, Other Senior Debt, Health Care Equipment & Services | Maximum                                
Interest rate, paid in kind [7],[30],[33],[51] 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%                    
Investment, Identifier [Axis]: Apex Group Limited                                
Variable rate [16],[29],[35]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75%      
Base Rate Floor [29],[35]               0.50% 0.50% 0.50% 0.50% 0.50% 0.50%      
Principal amount [18],[29],[35]               $ 8,000,000.0                
Amortized Cost [29],[35]               (7,900,000)                
Fair Value [4],[29],[35]               $ (8,000,000.0)                
Investment, Identifier [Axis]: Apex Group Limited, Senior Secured Loans - First Lien, Diversified Financials 1                                
Variable rate [7],[10],[11],[41] 3.75% 3.75% 3.75% 3.75% 3.75% 3.75%                    
Base Rate Floor [7],[10],[11],[41] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                    
Principal amount [10],[11],[15],[41] $ 2,500,000                              
Amortized Cost [10],[11],[41] (2,500,000)                              
Fair Value [3],[10],[11],[41] $ (2,400,000)                              
Investment, Identifier [Axis]: Apex Group Limited, Senior Secured Loans - First Lien, Diversified Financials 2                                
Variable rate [7],[10],[11],[41] 4.00% 4.00% 4.00% 4.00% 4.00% 4.00%                    
Base Rate Floor [7],[10],[11],[41] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount [10],[11],[15],[41] $ 2,000,000.0                              
Amortized Cost [10],[11],[41] (2,300,000)                              
Fair Value [3],[10],[11],[41] $ (1,900,000)                              
Investment, Identifier [Axis]: Apex Group Limited, Senior Secured Loans -Second Lien, Diversified Financials                                
Variable rate [7],[10],[11] 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%                    
Base Rate Floor [7],[10],[11] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                    
Principal amount [10],[11],[15] $ 55,000,000.0                              
Amortized Cost [10],[11] (54,000,000.0)                              
Fair Value [3],[10],[11] $ (53,400,000)                              
Investment, Identifier [Axis]: Arcfield Acquisition Group, Senior Secured Loans - First Lien, Capital Goods 1                                
Variable rate [7],[10],[12] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[10],[12] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[12],[15] $ 40,400,000                              
Amortized Cost [10],[12] (40,000,000.0)                              
Fair Value [3],[10],[12] $ (39,600,000)                              
Investment, Identifier [Axis]: Arcfield Acquisition Group, Senior Secured Loans - First Lien, Capital Goods 2                                
Variable rate [7],[22] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount | £ [15],[22]         £ 7.1                      
Amortized Cost [22] $ (7,100,000)                              
Fair Value [3],[22] $ (6,900,000)                              
Investment, Identifier [Axis]: Arcos LLC/VA, Preferred Stock                                
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Number of Shares | shares [35]               15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000      
Amortized Cost [35]               $ (14,000,000.0)                
Fair Value [4],[35]               $ (15,500,000)                
Investment, Identifier [Axis]: Arcos LLC/VA, Preferred Stock | Maximum                                
Interest rate, paid in kind [16],[35]               9.50% 9.50% 9.50% 9.50% 9.50% 9.50%      
Investment, Identifier [Axis]: Arcos LLC/VA, Preferred Stock, Equity/Other, Software & Services                                
Interest rate, paid in kind [7],[10] 9.50% 9.50% 9.50% 9.50% 9.50% 9.50%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Number of Shares | shares [10] 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000 15,000,000                    
Amortized Cost [10] $ (14,000,000.0)                              
Fair Value [3],[10] $ (13,700,000)                              
Investment, Identifier [Axis]: Arcos LLC/VA, Preferred Stock, Equity/Other, Software & Services | Maximum                                
Interest rate, paid in kind [7],[10] 9.50% 9.50% 9.50% 9.50% 9.50% 9.50%                    
Investment, Identifier [Axis]: Arcos LLC/VA, Senior Secured Loans - First Lien, Software & Services 1                                
Variable rate [7],[44] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount | £ [15],[44]         £ 12.4                      
Amortized Cost [44] $ (12,200,000)                              
Fair Value [3],[44] $ (11,800,000)                              
Investment, Identifier [Axis]: Arcos LLC/VA, Senior Secured Loans - First Lien, Software & Services 2                                
Variable rate [7],[22] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22]           $ 4.5                    
Amortized Cost [22] $ (4,500,000)                              
Fair Value [3],[22] $ (4,300,000)                              
Investment, Identifier [Axis]: Arcos LLC/VA, Senior Secured Loans—First Lien, Software & Services, Maturing April 20, 2027                                
Variable rate [16],[17]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 4,500,000                
Amortized Cost [17]               (4,500,000)                
Fair Value [4],[17]               $ (4,500,000)                
Investment, Identifier [Axis]: Arcos LLC/VA, Senior Secured Loans—First Lien, Software & Services, Maturing March 31, 2028                                
Variable rate [16],[43]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[43]               $ 12,500,000                
Amortized Cost [43]               (12,300,000)                
Fair Value [4],[43]               $ (12,400,000)                
Investment, Identifier [Axis]: Ardonagh Group Ltd                                
Interest rate, paid in kind [16],[29],[35],[40]               12.80% 12.80% 12.80% 12.80% 12.80% 12.80%      
Principal amount [18],[29],[35],[40]               $ 900,000                
Amortized Cost [29],[35],[40]               (900,000)                
Fair Value [4],[29],[35],[40]               $ (1,000,000.0)                
Investment, Identifier [Axis]: Ardonagh Group Ltd | Maximum                                
Interest rate, paid in kind [16],[29],[35],[40]               12.80% 12.80% 12.80% 12.80% 12.80% 12.80%      
Investment, Identifier [Axis]: Ardonagh Group Ltd, Senior Secured Loans - First Lien, Insurance 1                                
Variable rate [7],[10],[11] 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%                    
Base Rate Floor [7],[10],[11] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[11],[15]           $ 0.8                    
Amortized Cost [10],[11] $ (1,000,000.0)                              
Fair Value [3],[10],[11] $ (900,000)                              
Investment, Identifier [Axis]: Ardonagh Group Ltd, Senior Secured Loans - First Lien, Insurance 2                                
Variable rate [7],[11],[22] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[11],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [11],[15],[22] $ 16,700,000                              
Amortized Cost [11],[22] (22,800,000)                              
Fair Value [3],[11],[22] $ (21,900,000)                              
Investment, Identifier [Axis]: Ardonagh Group Ltd, Senior Secured Loans—First Lien, Insurance, Maturing July 14, 2026 - 3                                
Variable rate [16],[17],[29]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [17],[29]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount | £ [17],[18],[29]                       £ 16.7        
Amortized Cost [17],[29]               $ (22,800,000)                
Fair Value [4],[17],[29]               $ (22,100,000)                
Investment, Identifier [Axis]: Ardonagh Group Ltd, Senior Secured Loans—First Lien, Insurance, Maturing July 14, 2026 -1                                
Variable rate [16],[29],[35]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75%      
Base Rate Floor [29],[35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount | £ [18],[29],[35]                       £ 0.8        
Amortized Cost [29],[35]               $ (1,000,000.0)                
Fair Value [4],[29],[35]               $ (1,100,000)                
Investment, Identifier [Axis]: Ardonagh Group Ltd, Senior Secured Loans—First Lien, Insurance, Maturing July 14, 2026 -2                                
Variable rate [16],[29],[35]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [29],[35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[29],[35]               $ 14,100,000                
Amortized Cost [29],[35]               (13,800,000)                
Fair Value [4],[29],[35]               $ (13,900,000)                
Investment, Identifier [Axis]: Ardonagh Group Ltd, Subordinated Debt, Insurance                                
Interest rate, paid in kind [7],[10],[11],[41] 12.80% 12.80% 12.80% 12.80% 12.80% 12.80%                    
Principal amount [10],[11],[15],[41] $ 1,000,000.0                              
Amortized Cost [10],[11],[41] (1,000,000.0)                              
Fair Value [3],[10],[11],[41] $ (1,000,000.0)                              
Investment, Identifier [Axis]: Ardonagh Group Ltd, Subordinated Debt, Insurance | Maximum                                
Interest rate, paid in kind [7],[10],[11],[41] 12.80% 12.80% 12.80% 12.80% 12.80% 12.80%                    
Investment, Identifier [Axis]: Ardonagh Ltd, Ordinary Shares, Equity/Other, Insurance -1                                
Number of Shares | shares [28],[29],[35]               16,450 16,450 16,450 16,450 16,450 16,450      
Amortized Cost [28],[29],[35]               $ 0                
Fair Value [4],[28],[29],[35]               $ (2,800,000)                
Investment, Identifier [Axis]: Ardonagh Ltd, Ordinary Shares, Equity/Other, Insurance -2                                
Number of Shares | shares [28],[29],[35]               116,814 116,814 116,814 116,814 116,814 116,814      
Amortized Cost [28],[29],[35]               $ (200,000)                
Fair Value [4],[28],[29],[35]               $ (500,000)                
Investment, Identifier [Axis]: Ardonagh Ltd, Preferred Stock                                
Number of Shares | shares [28],[29],[35]               6,113,719 6,113,719 6,113,719 6,113,719 6,113,719 6,113,719      
Amortized Cost [28],[29],[35]               $ (9,100,000)                
Fair Value [4],[28],[29],[35]               $ (22,000,000.0)                
Investment, Identifier [Axis]: Arena Energy LP, Warrants                                
Number of Shares | shares [28],[35]               68,186,525 68,186,525 68,186,525 68,186,525 68,186,525 68,186,525      
Amortized Cost [28],[35]               $ (400,000)                
Fair Value [4],[28],[35]               $ (600,000)                
Investment, Identifier [Axis]: Arena Energy LP, Warrants, Equity/Other, Energy                                
Number of Shares | shares [10] 68,186,525 68,186,525 68,186,525 68,186,525 68,186,525 68,186,525                    
Amortized Cost [10] $ (400,000)                              
Fair Value [3],[10] $ (500,000)                              
Investment, Identifier [Axis]: Arrotex Australia Group Pty Ltd, Senior Secured Loans—First Lien, Pharmaceuticals, Biotechnology & Life Sciences, July 10, 2024 -1                                
Variable rate [16],[29],[35]               5.25% 5.25% 5.25% 5.25% 5.25% 5.25%      
Base Rate Floor [29],[35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[29],[35]                         $ 42.6      
Amortized Cost [29],[35]               $ (30,400,000)                
Fair Value [4],[29],[35]               $ (30,900,000)                
Investment, Identifier [Axis]: Arrotex Australia Group Pty Ltd, Senior Secured Loans—First Lien, Pharmaceuticals, Biotechnology & Life Sciences, July 10, 2024 -2                                
Variable rate [16],[29],[35]               5.25% 5.25% 5.25% 5.25% 5.25% 5.25%      
Base Rate Floor [29],[35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[29],[35]                         $ 3.1      
Amortized Cost [29],[35]               $ (2,200,000)                
Fair Value [4],[29],[35]               $ (2,300,000)                
Investment, Identifier [Axis]: Arrotex Australia Group Pty Ltd, Senior Secured Loans - First Lien, Pharmaceuticals, Biotechnology & Life Sciences 1                                
Variable rate [7],[10],[11] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                    
Base Rate Floor [7],[10],[11] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[11],[15] $ 42,600,000                              
Amortized Cost [10],[11] (30,900,000)                              
Fair Value [3],[10],[11] $ (27,400,000)                              
Investment, Identifier [Axis]: Arrotex Australia Group Pty Ltd, Senior Secured Loans - First Lien, Pharmaceuticals, Biotechnology & Life Sciences 2                                
Variable rate [7],[10],[11] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                    
Base Rate Floor [7],[10],[11] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[11],[15] $ 3,100,000                              
Amortized Cost [10],[11] (2,200,000)                              
Fair Value [3],[10],[11] $ (2,000,000.0)                              
Investment, Identifier [Axis]: Ascent Resources Utica Holdings LLC / ARU Finance Corp, Common Stock                                
Number of Shares | shares [28],[52]               10,193 10,193 10,193 10,193 10,193 10,193      
Amortized Cost [28],[52]               $ (9,700,000)                
Fair Value [4],[28],[52]               $ (2,300,000)                
Investment, Identifier [Axis]: Ascent Resources Utica Holdings LLC / ARU Finance Corp, Common Stock, Equity/Other, Energy                                
Number of Shares | shares [33],[53] 10,193 10,193 10,193 10,193 10,193 10,193                    
Amortized Cost [33],[53] $ (9,700,000)                              
Fair Value [3],[33],[53] $ (2,800,000)                              
Investment, Identifier [Axis]: Ascent Resources Utica Holdings LLC / ARU Finance Corp, Trade Claim 1                                
Number of Shares | shares [28],[52]               86,607,143 86,607,143 86,607,143 86,607,143 86,607,143 86,607,143      
Amortized Cost [28],[52]               $ (19,400,000)                
Fair Value [4],[28],[52]               $ (19,800,000)                
Investment, Identifier [Axis]: Ascent Resources Utica Holdings LLC / ARU Finance Corp, Trade Claim, Equity/Other, Energy                                
Number of Shares | shares [33],[53] 86,607,143 86,607,143 86,607,143 86,607,143 86,607,143 86,607,143                    
Amortized Cost [33],[53] $ (19,400,000)                              
Fair Value [3],[33],[53] $ (23,500,000)                              
Investment, Identifier [Axis]: Aspect Software Inc                                
Interest rate, paid in kind [16],[35]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00%      
Principal amount [18],[35]               $ 300,000                
Amortized Cost [35]               (200,000)                
Fair Value [4],[35]               $ (300,000)                
Investment, Identifier [Axis]: Aspect Software Inc | Maximum                                
Interest rate, paid in kind [16],[35]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00%      
Investment, Identifier [Axis]: Aspect Software Inc, Common Stock                                
Number of Shares | shares [20],[28],[35],[37]               1,309,955 1,309,955 1,309,955 1,309,955 1,309,955 1,309,955      
Amortized Cost [20],[28],[35],[37]               $ (2,300,000)                
Fair Value [4],[20],[28],[35],[37]               $ (2,700,000)                
Investment, Identifier [Axis]: Aspect Software Inc, Warrant                                
Number of Shares | shares [20],[28],[35],[37]               181,730 181,730 181,730 181,730 181,730 181,730      
Amortized Cost [20],[28],[35],[37]               $ (300,000)                
Fair Value [4],[20],[28],[35],[37]               $ (300,000)                
Investment, Identifier [Axis]: Australis Maritime, Common Stock                                
Number of Shares | shares [29],[35]               46,781,830 46,781,830 46,781,830 46,781,830 46,781,830 46,781,830      
Amortized Cost [29],[35]               $ (45,100,000)                
Fair Value [4],[29],[35]               $ (46,700,000)                
Investment, Identifier [Axis]: Australis Maritime, Common Stock, Asset Based Finance, Transportation                                
Number of Shares | shares [10],[11] 43,151,590 43,151,590 43,151,590 43,151,590 43,151,590 43,151,590                    
Amortized Cost [10],[11] $ (41,700,000)                              
Fair Value [3],[10],[11] $ (43,600,000)                              
Investment, Identifier [Axis]: Avenue One PropCo, Private Equity, Asset Based Finance, Real Estate                                
Number of Shares | shares [10],[11] 41,348,722 41,348,722 41,348,722 41,348,722 41,348,722 41,348,722                    
Amortized Cost [10],[11] $ (41,300,000)                              
Fair Value [3],[10],[11] $ (41,300,000)                              
Investment, Identifier [Axis]: Avida Holding AB, Common Stock                                
Number of Shares | shares [28],[29],[34],[35]               405,023,756 405,023,756 405,023,756 405,023,756 405,023,756 405,023,756      
Amortized Cost [28],[29],[34],[35]               $ (44,600,000)                
Fair Value [4],[28],[29],[34],[35]               $ (52,300,000)                
Investment, Identifier [Axis]: Avida Holding AB, Common Stock, Asset Based Finance, Diversified Financials                                
Number of Shares | shares [10],[11],[33],[36] 405,023,756 405,023,756 405,023,756 405,023,756 405,023,756 405,023,756                    
Amortized Cost [10],[11],[33],[36] $ (44,600,000)                              
Fair Value [3],[10],[11],[33],[36] $ (37,700,000)                              
Investment, Identifier [Axis]: AxiomSL Ltd, Senior Secured Loans - First Lien, Software & Services 1                                
Variable rate [7],[10],[23],[24],[44] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[10],[23],[24],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[23],[24],[44] $ 34,800,000                              
Amortized Cost [10],[23],[24],[44] (34,200,000)                              
Fair Value [3],[10],[23],[24],[44] $ (34,100,000)                              
Investment, Identifier [Axis]: AxiomSL Ltd, Senior Secured Loans - First Lien, Software & Services 2                                
Variable rate [7],[22] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 2,500,000                              
Amortized Cost [22] (2,400,000)                              
Fair Value [3],[22] $ (2,400,000)                              
Investment, Identifier [Axis]: AxiomSL Ltd, Senior Secured Loans - First Lien, Software & Services 3                                
Variable rate [7],[22] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 2,300,000                              
Amortized Cost [22] (2,300,000)                              
Fair Value [3],[22] $ (2,200,000)                              
Investment, Identifier [Axis]: AxiomSL Ltd, Senior Secured Loans—First Lien, Software & Services, Maturing December 3, 2025                                
Variable rate [16],[17]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 2,500,000                
Amortized Cost [17]               (2,400,000)                
Fair Value [4],[17]               $ (2,400,000)                
Investment, Identifier [Axis]: AxiomSL Ltd, Senior Secured Loans—First Lien, Software & Services, Maturing December 3, 2027 -1                                
Variable rate [16],[35],[42],[43],[47]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [35],[42],[43],[47]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[42],[43],[47]               $ 35,100,000                
Amortized Cost [35],[42],[43],[47]               (34,400,000)                
Fair Value [4],[35],[42],[43],[47]               $ (34,400,000)                
Investment, Identifier [Axis]: AxiomSL Ltd, Senior Secured Loans—First Lien, Software & Services, Maturing December 3, 2027- 2                                
Variable rate [16],[17]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 2,300,000                
Amortized Cost [17]               (2,300,000)                
Fair Value [4],[17]               $ (2,200,000)                
Investment, Identifier [Axis]: BGB Group LLC, Senior Secured Loans - First Lien, Media & Entertainment 1                                
Variable rate [7],[12],[13],[14],[23],[24],[44] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[12],[13],[14],[23],[24],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [12],[13],[14],[15],[23],[24],[44] $ 111,400,000                              
Amortized Cost [12],[13],[14],[23],[24],[44] (110,400,000)                              
Fair Value [3],[12],[13],[14],[23],[24],[44] $ (109,700,000)                              
Investment, Identifier [Axis]: BGB Group LLC, Senior Secured Loans - First Lien, Media & Entertainment 2                                
Variable rate [7],[22] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 19,900,000                              
Amortized Cost [22] (19,900,000)                              
Fair Value [3],[22] $ (19,600,000)                              
Investment, Identifier [Axis]: BGB Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -1                                
Variable rate [16],[19],[20],[21],[35],[42],[43],[47]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [19],[20],[21],[35],[42],[43],[47]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[19],[20],[21],[35],[42],[43],[47]               $ 118,600,000                
Amortized Cost [19],[20],[21],[35],[42],[43],[47]               (117,500,000)                
Fair Value [4],[19],[20],[21],[35],[42],[43],[47]               $ (118,000,000.0)                
Investment, Identifier [Axis]: BGB Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -2                                
Variable rate [16],[17]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 19,900,000                
Amortized Cost [17]               (19,900,000)                
Fair Value [4],[17]               $ (19,800,000)                
Investment, Identifier [Axis]: Bank of Ireland, Class B Credit Linked Floating Rate Note                                
Variable rate [16],[29],[48]               11.85% 11.85% 11.85% 11.85% 11.85% 11.85%      
Principal amount [29],[48]               $ 14,700,000                
Amortized Cost [29],[48]               (14,700,000)                
Fair Value [4],[29],[48]               $ (14,700,000)                
Investment, Identifier [Axis]: Barbri Inc, Senior Secured Loans - First Lien, Consumer Services 1                                
Variable rate [7],[10],[13],[14],[23],[24],[44] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[10],[13],[14],[23],[24],[44] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[13],[14],[15],[23],[24],[44] $ 132,100,000                              
Amortized Cost [10],[13],[14],[23],[24],[44] (127,900,000)                              
Fair Value [3],[10],[13],[14],[23],[24],[44] $ (132,100,000)                              
Investment, Identifier [Axis]: Barbri Inc, Senior Secured Loans - First Lien, Consumer Services 2                                
Variable rate [7],[22] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 9,100,000                              
Amortized Cost [22] (9,100,000)                              
Fair Value [3],[22] $ (9,100,000)                              
Investment, Identifier [Axis]: Barbri Inc, Senior Secured Loans—First Lien, Consumer Services, Maturing April 28, 2028                                
Variable rate [16],[19],[20]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [19],[20],[35],[42],[43],[47]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[19],[20],[35],[42],[43],[47]               $ 92,400,000                
Amortized Cost [19],[20],[35],[42],[43],[47]               (88,100,000)                
Fair Value [4],[19],[20],[35],[42],[43],[47]               $ (92,400,000)                
Investment, Identifier [Axis]: Barbri Inc, Senior Secured Loans—First Lien, Consumer Services, Maturing April 30, 2028 - 1                                
Base Rate Floor [19],[20]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[19],[20]               $ 35,100,000                
Amortized Cost [19],[20]               (34,800,000)                
Fair Value [4],[19],[20]               $ (34,800,000)                
Investment, Identifier [Axis]: Barbri Inc, Senior Secured Loans—First Lien, Consumer Services, Maturing April 30, 2028 -2                                
Variable rate [16],[17]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 14,800,000                
Amortized Cost [17]               (14,800,000)                
Fair Value [4],[17]               $ (14,600,000)                
Investment, Identifier [Axis]: Belk Inc                                
Interest rate, paid in kind [16],[25],[28],[35],[45]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00%      
Base Rate Floor [25],[28],[35],[45]                    
Principal amount [18],[25],[28],[35],[45]               $ 25,500,000                
Amortized Cost [25],[28],[35],[45]               (4,200,000)                
Fair Value [4],[25],[28],[35],[45]               $ (6,700,000)                
Investment, Identifier [Axis]: Belk Inc | Maximum                                
Interest rate, paid in kind [16],[25],[28],[35],[45]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00%      
Investment, Identifier [Axis]: Belk Inc, Common Stock                                
Number of Shares | shares [28],[35],[45]               94,950 94,950 94,950 94,950 94,950 94,950      
Amortized Cost [28],[35],[45]               $ 0                
Fair Value [4],[28],[35],[45]               $ 0                
Investment, Identifier [Axis]: Belk Inc, Common Stock, Equity/Other, Retailing                                
Number of Shares | shares [10],[46] 94,950 94,950 94,950 94,950 94,950 94,950                    
Amortized Cost [10],[46] $ 0                              
Fair Value [3],[10],[46] $ 0                              
Investment, Identifier [Axis]: Belk Inc, Senior Secured Loans - First Lien, Retailing 1                                
Variable rate [7],[10],[41],[46] 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%                    
Base Rate Floor [7],[10],[41],[46] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[41],[46] $ 21,900,000                              
Amortized Cost [10],[41],[46] (21,800,000)                              
Fair Value [3],[10],[41],[46] $ (19,600,000)                              
Investment, Identifier [Axis]: Belk Inc, Senior Secured Loans - First Lien, Retailing 2                                
Variable rate [7],[10],[30],[33],[41],[46] 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%                    
Interest rate, paid in kind [7],[10],[30],[33],[41],[46] 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%                    
Principal amount [10],[15],[30],[33],[41],[46] $ 69,900,000                              
Amortized Cost [10],[30],[33],[41],[46] (43,500,000)                              
Fair Value [3],[10],[30],[33],[41],[46] $ (12,900,000)                              
Investment, Identifier [Axis]: Belk Inc, Senior Secured Loans - First Lien, Retailing 2 | Maximum                                
Interest rate, paid in kind [7],[10],[30],[33],[41],[46] 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%                    
Investment, Identifier [Axis]: Belk Inc, Senior Secured Loans -Second Lien, Retailing                                
Interest rate, paid in kind [7],[10],[30],[33],[46] 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%                    
Base Rate Floor [7],[10],[30],[33],[46]                    
Principal amount [10],[15],[30],[33],[46] $ 27,500,000                              
Amortized Cost [10],[30],[33],[46] (4,200,000)                              
Fair Value [3],[10],[30],[33],[46] $ (3,700,000)                              
Investment, Identifier [Axis]: Belk Inc, Senior Secured Loans -Second Lien, Retailing | Maximum                                
Interest rate, paid in kind [7],[10],[30],[33],[46] 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%                    
Investment, Identifier [Axis]: Belk Inc, Senior Secured Loans—First Lien, Retailing, Maturing July 31, 2025 -1                                
Variable rate [16],[35],[40],[45]               7.50% 7.50% 7.50% 7.50% 7.50% 7.50%      
Base Rate Floor [35],[40],[45]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[40],[45]               $ 21,900,000                
Amortized Cost [35],[40],[45]               (21,700,000)                
Fair Value [4],[35],[40],[45]               $ (21,900,000)                
Investment, Identifier [Axis]: Belk Inc, Senior Secured Loans—First Lien, Retailing, Maturing July 31, 2025 -2                                
Variable rate [16],[35],[40],[45]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00%      
Interest rate, paid in kind [16],[35],[40],[45]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00%      
Principal amount [18],[35],[40],[45]               $ 66,700,000                
Amortized Cost [35],[40],[45]               (40,200,000)                
Fair Value [4],[35],[40],[45]               $ (49,200,000)                
Investment, Identifier [Axis]: Belk Inc, Senior Secured Loans—First Lien, Retailing, Maturing July 31, 2025 -2 | Maximum                                
Interest rate, paid in kind [16],[35],[40],[45]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00%      
Investment, Identifier [Axis]: Borden (New Dairy Opco) 1                                
Variable rate [16],[35],[45]               7.00% 7.00% 7.00% 7.00% 7.00% 7.00%      
Interest rate, paid in kind [16],[35],[45]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Base Rate Floor [35],[45]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[45]               $ 42,000,000.0                
Amortized Cost [35],[45]               (40,200,000)                
Fair Value [4],[35],[45]               $ (42,000,000.0)                
Investment, Identifier [Axis]: Borden (New Dairy Opco) 1 | Maximum                                
Interest rate, paid in kind [16],[35],[45]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Investment, Identifier [Axis]: Borden (New Dairy Opco) 2                                
Variable rate [16],[35],[45]               2.50% 2.50% 2.50% 2.50% 2.50% 2.50%      
Base Rate Floor [35],[45]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[45]               $ 9,000,000.0                
Amortized Cost [35],[45]               (8,400,000)                
Fair Value [4],[35],[45]               $ (9,000,000.0)                
Investment, Identifier [Axis]: Borden (New Dairy Opco), Common Stock                                
Number of Shares | shares [28],[45],[50],[54]               11,167,000 11,167,000 11,167,000 11,167,000 11,167,000 11,167,000      
Amortized Cost [28],[45],[50],[54]               $ (9,100,000)                
Fair Value [4],[28],[45],[50],[54]               $ (7,700,000)                
Investment, Identifier [Axis]: Borden (New Dairy Opco), Common Stock, Equity/Other, Food, Beverage & Tobacco                                
Number of Shares | shares [33],[46],[51],[55] 11,167,000 11,167,000 11,167,000 11,167,000 11,167,000 11,167,000                    
Amortized Cost [33],[46],[51],[55] $ (9,100,000)                              
Fair Value [3],[33],[46],[51],[55] $ (4,900,000)                              
Investment, Identifier [Axis]: Borden Dairy Co                                
Variable rate [16],[25],[28],[35],[45]               8.25% 8.25% 8.25% 8.25% 8.25% 8.25%      
Base Rate Floor [25],[28],[35],[45]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[25],[28],[35],[45]               $ 65,000,000.0                
Amortized Cost [25],[28],[35],[45]               (25,400,000)                
Fair Value [4],[25],[28],[35],[45]               $ 0                
Investment, Identifier [Axis]: Bowery Farming Inc                                
Variable rate [16],[35]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 75,000,000.0                
Amortized Cost [35]               (74,300,000)                
Fair Value [4],[35]               $ (69,300,000)                
Investment, Identifier [Axis]: Bowery Farming Inc, Senior Secured Loans - First Lien, Food, Beverage & Tobacco                                
Variable rate [7],[10] 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 75,000,000.0                              
Amortized Cost [10] (74,400,000)                              
Fair Value [3],[10] $ (70,000,000.0)                              
Investment, Identifier [Axis]: Bowery Farming Inc, Warrants                                
Number of Shares | shares [28],[35]               161,828 161,828 161,828 161,828 161,828 161,828      
Amortized Cost [28],[35]               $ (0.0)                
Fair Value [4],[28],[35]               $ (5,200,000)                
Investment, Identifier [Axis]: Bowery Farming Inc, Warrants, Equity/Other, Food, Beverage & Tobacco                                
Number of Shares | shares [10],[33] 161,828 161,828 161,828 161,828 161,828 161,828                    
Amortized Cost [10],[33] $ (0.0)                              
Fair Value [3],[10],[33] $ (3,000,000.0)                              
Investment, Identifier [Axis]: Byrider Finance LLC                                
Variable rate [16],[35],[56]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00%      
Interest rate, paid in kind [16],[35],[56]               0.50% 0.50% 0.50% 0.50% 0.50% 0.50%      
Base Rate Floor [35],[56]               1.30% 1.30% 1.30% 1.30% 1.30% 1.30%      
Principal amount [18],[35],[56]               $ 54,300,000                
Amortized Cost [35],[56]               (52,800,000)                
Fair Value [4],[35],[56]               $ (54,400,000)                
Investment, Identifier [Axis]: Byrider Finance LLC | Maximum                                
Interest rate, paid in kind [16],[35],[56]               0.50% 0.50% 0.50% 0.50% 0.50% 0.50%      
Investment, Identifier [Axis]: Byrider Finance LLC, Senior Secured Loans -Second Lien, Automobiles & Components                                
Variable rate [7],[9],[10],[30],[33] 16.00% 16.00% 16.00% 16.00% 16.00% 16.00%                    
Base Rate Floor [7],[9],[10],[30],[33] 1.30% 1.30% 1.30% 1.30% 1.30% 1.30%                    
Principal amount [9],[10],[15],[30],[33] $ 54,400,000                              
Amortized Cost [9],[10],[30],[33] (53,200,000)                              
Fair Value [3],[9],[10],[30],[33] $ (14,800,000)                              
Investment, Identifier [Axis]: Byrider Finance LLC, Structured Mezzanine                                
Variable rate [16],[17]               10.50% 10.50% 10.50% 10.50% 10.50% 10.50%      
Base Rate Floor [17]               0.30% 0.30% 0.30% 0.30% 0.30% 0.30%      
Principal amount [17]               $ 23,000,000.0                
Amortized Cost [17]               (23,000,000.0)                
Fair Value [4],[17]               $ (23,000,000.0)                
Investment, Identifier [Axis]: Byrider Finance LLC, Structured Mezzanine, Asset Based Finance, Automobiles & Components 1                                
Variable rate [7],[10] 10.50% 10.50% 10.50% 10.50% 10.50% 10.50%                    
Base Rate Floor [7],[10] 0.30% 0.30% 0.30% 0.30% 0.30% 0.30%                    
Principal amount [10],[15] $ 10,600,000                              
Amortized Cost [10] (10,600,000)                              
Fair Value [3],[10] $ (10,600,000)                              
Investment, Identifier [Axis]: Byrider Finance LLC, Structured Mezzanine, Asset Based Finance, Automobiles & Components 2                                
Variable rate [7],[22] 10.50% 10.50% 10.50% 10.50% 10.50% 10.50%                    
Base Rate Floor [7],[22] 0.30% 0.30% 0.30% 0.30% 0.30% 0.30%                    
Principal amount [15],[22] $ 12,400,000                              
Amortized Cost [22] (12,400,000)                              
Fair Value [3],[22] $ (12,300,000)                              
Investment, Identifier [Axis]: CDS US Intermediate Holdings Inc, Warrant                                
Number of Shares | shares [28],[29],[35]               2,023,714 2,023,714 2,023,714 2,023,714 2,023,714 2,023,714      
Amortized Cost [28],[29],[35]               $ 0                
Fair Value [4],[28],[29],[35]               $ 0                
Investment, Identifier [Axis]: CDS US Intermediate Holdings Inc, Warrant, Equity/Other, Media & Entertainment                                
Number of Shares | shares [10],[11],[33],[41] 2,023,714 2,023,714 2,023,714 2,023,714 2,023,714 2,023,714                    
Amortized Cost [10],[11],[33],[41] $ 0                              
Fair Value [3],[10],[11],[33],[41] $ (5,800,000)                              
Investment, Identifier [Axis]: CFC Underwriting Ltd, Senior Secured Loans - First Lien, Insurance 1                                
Variable rate [7],[10],[11] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Interest rate, paid in kind [7],[10],[11] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Base Rate Floor [7],[10],[11] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                    
Principal amount | € [10],[11],[15]       € 39.5                        
Amortized Cost [10],[11] $ (38,500,000)                              
Fair Value [3],[10],[11] $ (38,300,000)                              
Investment, Identifier [Axis]: CFC Underwriting Ltd, Senior Secured Loans - First Lien, Insurance 1 | Maximum                                
Interest rate, paid in kind [7],[10],[11] 2.80% 2.80% 2.80% 2.80% 2.80% 2.80%                    
Investment, Identifier [Axis]: CFC Underwriting Ltd, Senior Secured Loans - First Lien, Insurance 2                                
Variable rate [7],[11],[22] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Interest rate, paid in kind [7],[11],[22] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Base Rate Floor [7],[11],[22] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount [11],[15],[22] $ 4,700,000                              
Amortized Cost [11],[22] (5,700,000)                              
Fair Value [3],[11],[22] $ (5,600,000)                              
Investment, Identifier [Axis]: CFC Underwriting Ltd, Senior Secured Loans - First Lien, Insurance 2 | Maximum                                
Interest rate, paid in kind [7],[11],[22] 2.80% 2.80% 2.80% 2.80% 2.80% 2.80%                    
Investment, Identifier [Axis]: CSafe Global, Senior Secured Loans - First Lien, Capital Goods                                
Variable rate [7],[10] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 27,200,000                              
Amortized Cost [10] (36,000,000.0)                              
Fair Value [3],[10] $ (30,300,000)                              
Investment, Identifier [Axis]: CSafe Global, Senior Secured Loans - First Lien, Capital Goods 1                                
Variable rate [7],[10],[12],[13],[14],[23],[24],[44] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10],[12],[13],[14],[23],[24],[44] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[12],[13],[14],[15],[23],[24],[44] $ 187,300,000                              
Amortized Cost [10],[12],[13],[14],[23],[24],[44] (181,800,000)                              
Fair Value [3],[10],[12],[13],[14],[23],[24],[44] $ (187,300,000)                              
Investment, Identifier [Axis]: CSafe Global, Senior Secured Loans - First Lien, Capital Goods 3                                
Variable rate [7],[10] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 11,800,000                              
Amortized Cost [10] (11,800,000)                              
Fair Value [3],[10] $ (11,800,000)                              
Investment, Identifier [Axis]: CSafe Global, Senior Secured Loans - First Lien, Capital Goods 4                                
Variable rate [7],[22] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 34,900,000                              
Amortized Cost [22] (34,900,000)                              
Fair Value [3],[22] $ (34,700,000)                              
Investment, Identifier [Axis]: CSafe Global, Senior Secured Loans—First Lien, Capital Goods, August 13, 2028                                
Variable rate [16],[35]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[35]               $ 11,900,000                
Amortized Cost [35]               (11,900,000)                
Fair Value [4],[35]               $ (11,900,000)                
Investment, Identifier [Axis]: CSafe Global, Senior Secured Loans—First Lien, Capital Goods, December 23, 2026                                
Variable rate [16],[17]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 34,900,000                
Amortized Cost [17]               (34,900,000)                
Fair Value [4],[17]               $ (34,600,000)                
Investment, Identifier [Axis]: CSafe Global, Senior Secured Loans—First Lien, Capital Goods, December 23, 2027 -1                                
Variable rate [16],[19],[20],[21],[35],[42],[43],[47]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [19],[20],[21],[35],[42],[43],[47]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[19],[20],[21],[35],[42],[43],[47]               $ 188,700,000                
Amortized Cost [19],[20],[21],[35],[42],[43],[47]               (182,500,000)                
Fair Value [4],[19],[20],[21],[35],[42],[43],[47]               $ (188,700,000)                
Investment, Identifier [Axis]: CSafe Global, Senior Secured Loans—First Lien, Capital Goods, December 23, 2027 -2                                
Variable rate [16],[35]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount | £ [18],[35]                       £ 27.4        
Amortized Cost [35]               $ (36,300,000)                
Fair Value [4],[35]               $ (37,100,000)                
Investment, Identifier [Axis]: CTI Foods Holding Co LLC, Common Stock                                
Number of Shares | shares [28],[35]               5,892 5,892 5,892 5,892 5,892 5,892      
Amortized Cost [28],[35]               $ (700,000)                
Fair Value [4],[28],[35]               $ 0                
Investment, Identifier [Axis]: CTI Foods Holding Co LLC, Common Stock, Equity/Other, Food, Beverage & Tobacco                                
Number of Shares | shares [10],[33] 5,892 5,892 5,892 5,892 5,892 5,892                    
Amortized Cost [10],[33] $ (700,000)                              
Fair Value [3],[10],[33] $ 0                              
Investment, Identifier [Axis]: Caldic BV, Senior Secured Loans - First Lien, Retailing                                
Variable rate [7],[10],[11],[41] 3.75% 3.75% 3.75% 3.75% 3.75% 3.75%                    
Base Rate Floor [7],[10],[11],[41] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                    
Principal amount [10],[11],[15],[41] $ 1,400,000                              
Amortized Cost [10],[11],[41] (1,400,000)                              
Fair Value [3],[10],[11],[41] $ (1,300,000)                              
Investment, Identifier [Axis]: Caldic BV, Senior Secured Loans - First Lien, Retailing 1                                
Variable rate [7],[10],[11],[41] 3.50% 3.50% 3.50% 3.50% 3.50% 3.50%                    
Base Rate Floor [7],[10],[11],[41] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount [10],[11],[15],[41] $ 800,000                              
Amortized Cost [10],[11],[41] (900,000)                              
Fair Value [3],[10],[11],[41] $ (700,000)                              
Investment, Identifier [Axis]: Caldic BV, Senior Secured Loans -Second Lien, Retailing                                
Variable rate [7],[10],[11] 7.25% 7.25% 7.25% 7.25% 7.25% 7.25%                    
Base Rate Floor [7],[10],[11] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                    
Principal amount [10],[11],[15] $ 40,000,000.0                              
Amortized Cost [10],[11] (39,000,000.0)                              
Fair Value [3],[10],[11] $ (38,400,000)                              
Investment, Identifier [Axis]: Callodine Commercial Finance LLC, 2L Term Loan A                                
Interest rate, paid in kind [16],[35]               9.00% 9.00% 9.00% 9.00% 9.00% 9.00%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [35]               $ 125,000,000.0                
Amortized Cost [35]               (118,000,000.0)                
Fair Value [4],[35]               $ (125,600,000)                
Investment, Identifier [Axis]: Callodine Commercial Finance LLC, 2L Term Loan A, Asset Based Finance, Diversified Financials                                
Variable rate [7],[10] 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 125,000,000.0                              
Amortized Cost [10] (119,000,000.0)                              
Fair Value [3],[10] $ (126,000,000.0)                              
Investment, Identifier [Axis]: Callodine Commercial Finance LLC, 2L Term Loan B                                
Interest rate, paid in kind [16],[17]               9.00% 9.00% 9.00% 9.00% 9.00% 9.00%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17]               $ 40,300,000                
Amortized Cost [17]               (40,300,000)                
Fair Value [4],[17]               $ (40,500,000)                
Investment, Identifier [Axis]: Callodine Commercial Finance LLC, 2L Term Loan B, Asset Based Finance, Diversified Financials 1                                
Variable rate [7],[10] 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 12,000,000.0                              
Amortized Cost [10] (12,000,000.0)                              
Fair Value [3],[10] $ (12,100,000)                              
Investment, Identifier [Axis]: Callodine Commercial Finance LLC, 2L Term Loan B, Asset Based Finance, Diversified Financials 2                                
Variable rate [7],[22] 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 36,100,000                              
Amortized Cost [22] (36,100,000)                              
Fair Value [3],[22] $ (36,300,000)                              
Investment, Identifier [Axis]: Capital Automotive LP, Private Equity                                
Number of Shares | shares [29],[35]               21,640,936 21,640,936 21,640,936 21,640,936 21,640,936 21,640,936      
Amortized Cost [29],[35]               $ (23,700,000)                
Fair Value [4],[29],[35]               $ (28,100,000)                
Investment, Identifier [Axis]: Capital Automotive LP, Private Equity, Asset Based Finance, Real Estate                                
Number of Shares | shares [10],[11] 21,640,936 21,640,936 21,640,936 21,640,936 21,640,936 21,640,936                    
Amortized Cost [10],[11] $ (23,700,000)                              
Fair Value [3],[10],[11] $ (27,200,000)                              
Investment, Identifier [Axis]: Capital Automotive LP, Structured Mezzanine                                
Variable rate [16],[29],[35]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00%      
Principal amount [29],[35]               $ 42,700,000                
Amortized Cost [29],[35]               (41,900,000)                
Fair Value [4],[29],[35]               $ (42,700,000)                
Investment, Identifier [Axis]: Capital Automotive LP, Structured Mezzanine, Asset Based Finance, Real Estate                                
Variable rate [7],[10],[11] 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%                    
Principal amount [10],[11],[15] $ 42,700,000                              
Amortized Cost [10],[11] (41,900,000)                              
Fair Value [3],[10],[11] $ (42,700,000)                              
Investment, Identifier [Axis]: Catalina Marketing Corp, Common Stock                                
Number of Shares | shares [28],[35]               6,522 6,522 6,522 6,522 6,522 6,522      
Amortized Cost [28],[35]               $ 0                
Fair Value [4],[28],[35]               $ 0                
Investment, Identifier [Axis]: Catalina Marketing Corp, Common Stock, Equity/Other, Media & Entertainment                                
Number of Shares | shares [10],[33] 6,522 6,522 6,522 6,522 6,522 6,522                    
Amortized Cost [10],[33] $ 0                              
Fair Value [3],[10],[33] $ 0                              
Investment, Identifier [Axis]: Cengage Learning, Inc, Common Stock                                
Number of Shares | shares [28],[35]               227,802 227,802 227,802 227,802 227,802 227,802      
Amortized Cost [28],[35]               $ (7,500,000)                
Fair Value [4],[28],[35]               $ (4,200,000)                
Investment, Identifier [Axis]: Cengage Learning, Inc, Common Stock, Equity/Other, Media & Entertainment                                
Number of Shares | shares [10],[33] 227,802 227,802 227,802 227,802 227,802 227,802                    
Amortized Cost [10],[33] $ (7,500,000)                              
Fair Value [3],[10],[33] $ (3,500,000)                              
Investment, Identifier [Axis]: Cimarron Energy Inc                                
Variable rate [16],[25],[28],[35]               9.00% 9.00% 9.00% 9.00% 9.00% 9.00%      
Base Rate Floor [25],[28],[35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[25],[28],[35]               $ 7,500,000                
Amortized Cost [25],[28],[35]               (5,500,000)                
Fair Value [4],[25],[28],[35]               $ (3,600,000)                
Investment, Identifier [Axis]: Cimarron Energy Inc, Common Stock                                
Number of Shares | shares [28],[35]               4,302,293 4,302,293 4,302,293 4,302,293 4,302,293 4,302,293      
Amortized Cost [28],[35]               $ 0                
Fair Value [4],[28],[35]               $ 0                
Investment, Identifier [Axis]: Cimarron Energy Inc, Common Stock, Equity/Other, Energy                                
Number of Shares | shares [10],[33] 4,302,293 4,302,293 4,302,293 4,302,293 4,302,293 4,302,293                    
Amortized Cost [10],[33] $ 0                              
Fair Value [3],[10],[33] $ 0                              
Investment, Identifier [Axis]: Cimarron Energy Inc, Participation Option                                
Number of Shares | shares [28],[35]               25,000,000 25,000,000 25,000,000 25,000,000 25,000,000 25,000,000      
Amortized Cost [28],[35]               $ 0                
Fair Value [4],[28],[35]               $ 0                
Investment, Identifier [Axis]: Cimarron Energy Inc, Participation Option, Equity/Other, Energy                                
Number of Shares | shares [10],[33] 25,000,000 25,000,000 25,000,000 25,000,000 25,000,000 25,000,000                    
Amortized Cost [10],[33] $ 0                              
Fair Value [3],[10],[33] $ 0                              
Investment, Identifier [Axis]: Cimarron Energy Inc, Senior Secured Loans - First Lien, Energy                                
Variable rate [7],[10],[30],[33] 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%                    
Base Rate Floor [7],[10],[30],[33] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[30],[33] $ 7,500,000                              
Amortized Cost [10],[30],[33] (5,000,000.0)                              
Fair Value [3],[10],[30],[33] $ (3,500,000)                              
Investment, Identifier [Axis]: Clarience Technologies LLC, Senior Secured Loans - First Lien, Capital Goods 1                                
Variable rate [7],[10] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 1,800,000                              
Amortized Cost [10] (1,700,000)                              
Fair Value [3],[10] $ (1,800,000)                              
Investment, Identifier [Axis]: Clarience Technologies LLC, Senior Secured Loans - First Lien, Capital Goods 2                                
Variable rate [7],[10],[12],[13],[23],[39],[44] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10],[12],[13],[23],[39],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[12],[13],[15],[23],[39],[44] $ 294,700,000                              
Amortized Cost [10],[12],[13],[23],[39],[44] (284,900,000)                              
Fair Value [3],[10],[12],[13],[23],[39],[44] $ (292,100,000)                              
Investment, Identifier [Axis]: Clarience Technologies LLC, Senior Secured Loans - First Lien, Capital Goods 3                                
Variable rate [7],[22] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 23,600,000                              
Amortized Cost [22] (23,600,000)                              
Fair Value [3],[22] $ (23,400,000)                              
Investment, Identifier [Axis]: Clarience Technologies LLC, Senior Secured Loans—First Lien, Capital Goods, December 13, 2024                                
Variable rate [16],[17]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 25,400,000                
Amortized Cost [17]               (25,200,000)                
Fair Value [4],[17]               $ (25,400,000)                
Investment, Identifier [Axis]: Clarience Technologies LLC, Senior Secured Loans—First Lien, Capital Goods, December 14, 2026                                
Variable rate [16],[19],[21],[35],[37],[43],[47]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [19],[21],[35],[37],[43],[47]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[19],[21],[35],[37],[43],[47]               $ 268,000,000.0                
Amortized Cost [19],[21],[35],[37],[43],[47]               (257,200,000)                
Fair Value [4],[19],[21],[35],[37],[43],[47]               $ (270,700,000)                
Investment, Identifier [Axis]: Clarience Technologies LLC, Senior Secured Loans—First Lien, Capital Goods, December 31, 2026 -1                                
Variable rate [16],[35]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 18,100,000                
Amortized Cost [35]               (17,600,000)                
Fair Value [4],[35]               $ (18,400,000)                
Investment, Identifier [Axis]: Clarience Technologies LLC, Senior Secured Loans—First Lien, Capital Goods, December 31, 2026 -2                                
Variable rate [16],[17]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 10,800,000                
Amortized Cost [17]               (10,800,000)                
Fair Value [4],[17]               $ (11,100,000)                
Investment, Identifier [Axis]: ClubCorp Club Operations Inc                                
Investment interest rate [16],[35],[40]               8.50% 8.50% 8.50% 8.50% 8.50% 8.50%      
Principal amount [18],[35],[40]               $ 37,300,000                
Amortized Cost [35],[40]               (35,400,000)                
Fair Value [4],[35],[40]               $ (35,700,000)                
Investment, Identifier [Axis]: Community Brands Inc, Senior Secured Loans - First Lien, Software & Services 1                                
Variable rate [7],[10] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 32,800,000                              
Amortized Cost [10] (32,200,000)                              
Fair Value [3],[10] $ (31,900,000)                              
Investment, Identifier [Axis]: Community Brands Inc, Senior Secured Loans - First Lien, Software & Services 2                                
Variable rate [7],[22] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 3,900,000                              
Amortized Cost [22] (3,800,000)                              
Fair Value [3],[22] $ (3,800,000)                              
Investment, Identifier [Axis]: Community Brands Inc, Senior Secured Loans - First Lien, Software & Services 3                                
Variable rate [7],[22] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 1,900,000                              
Amortized Cost [22] (1,900,000)                              
Fair Value [3],[22] $ (1,900,000)                              
Investment, Identifier [Axis]: Constellis Holdings LLC                                
Variable rate [16],[35],[45],[47]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00%      
Interest rate, paid in kind [16],[35],[45],[47]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Base Rate Floor [35],[45],[47]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[45],[47]               $ 13,500,000                
Amortized Cost [35],[45],[47]               (12,500,000)                
Fair Value [4],[35],[45],[47]               $ (12,000,000.0)                
Investment, Identifier [Axis]: Constellis Holdings LLC | Maximum                                
Interest rate, paid in kind [16],[35],[45],[47]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00%      
Investment, Identifier [Axis]: Constellis Holdings LLC 1                                
Variable rate [16],[35],[45]               7.50% 7.50% 7.50% 7.50% 7.50% 7.50%      
Base Rate Floor [35],[45]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[45]               $ 15,000,000.0                
Amortized Cost [35],[45]               (14,000,000.0)                
Fair Value [4],[35],[45]               $ (15,000,000.0)                
Investment, Identifier [Axis]: Constellis Holdings LLC, Private Equity                                
Number of Shares | shares [28],[35],[45],[47]               849,702 849,702 849,702 849,702 849,702 849,702      
Amortized Cost [28],[35],[45],[47]               $ (10,300,000)                
Fair Value [4],[28],[35],[45],[47]               $ (200,000)                
Investment, Identifier [Axis]: Constellis Holdings LLC, Private Equity, Equity/Other, Capital Goods                                
Number of Shares | shares [10],[23],[33],[46] 849,702 849,702 849,702 849,702 849,702 849,702                    
Amortized Cost [10],[23],[33],[46] $ (10,300,000)                              
Fair Value [3],[10],[23],[33],[46] $ (5,900,000)                              
Investment, Identifier [Axis]: Constellis Holdings LLC, Senior Secured Loans - First Lien, Capital Goods                                
Variable rate [7],[10],[46] 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%                    
Base Rate Floor [7],[10],[46] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[46] $ 15,000,000.0                              
Amortized Cost [10],[46] (14,300,000)                              
Fair Value [3],[10],[46] $ (15,000,000.0)                              
Investment, Identifier [Axis]: Constellis Holdings LLC, Senior Secured Loans -Second Lien, Capital Goods                                
Variable rate [7],[10],[46] 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%                    
Interest rate, paid in kind [7],[10],[46] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Base Rate Floor [7],[10],[46] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[46] $ 13,500,000                              
Amortized Cost [10],[46] (12,700,000)                              
Fair Value [3],[10],[46] $ (13,500,000)                              
Investment, Identifier [Axis]: Constellis Holdings LLC, Senior Secured Loans -Second Lien, Capital Goods | Maximum                                
Interest rate, paid in kind [7],[10],[46] 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%                    
Investment, Identifier [Axis]: Corsearch Intermediate Inc, Senior Secured Loans - First Lien, Software & Services 1                                
Variable rate [7],[10],[44] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[10],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[44] $ 30,100,000                              
Amortized Cost [10],[44] (28,500,000)                              
Fair Value [3],[10],[44] $ (29,800,000)                              
Investment, Identifier [Axis]: Corsearch Intermediate Inc, Senior Secured Loans - First Lien, Software & Services 2                                
Variable rate [7],[22] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 4,400,000                              
Amortized Cost [22] (4,400,000)                              
Fair Value [3],[22] (4,400,000)                              
Investment, Identifier [Axis]: Corsearch Intermediate Inc, Senior Secured Loans—First Lien, Software & Services -1                                
Variable rate [16],[35],[43]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [35],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[43]               $ 30,100,000                
Amortized Cost [35],[43]               (28,300,000)                
Fair Value [4],[35],[43]               $ (30,100,000)                
Investment, Identifier [Axis]: Corsearch Intermediate Inc, Senior Secured Loans—First Lien, Software & Services -2                                
Variable rate [16],[17]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 4,400,000                
Amortized Cost [17]               (4,400,000)                
Fair Value [4],[17]               $ (4,400,000)                
Investment, Identifier [Axis]: Credit Opportunities Partners JV, LLC                                
Principal amount [10],[11],[15],[36] 1,637,300,000                              
Number of Shares | shares [29],[34],[35]               1,462 1,462 1,462 1,462 1,462 1,462      
Amortized Cost (1,571,700,000) [10],[11],[36]             $ (1,396,700,000) [29],[34],[35]                
Fair Value $ (1,466,100,000) [3],[10],[11],[36]             $ (1,396,200,000) [4],[29],[34],[35]                
Investment, Identifier [Axis]: Cubic Corp                                
Variable rate [16],[35]               7.63% 7.63% 7.63% 7.63% 7.63% 7.63%      
Base Rate Floor [35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[35]               $ 54,800,000                
Amortized Cost [35]               (51,800,000)                
Fair Value [4],[35]               $ (55,600,000)                
Investment, Identifier [Axis]: Cubic Corp, Preferred Stock                                
Interest rate, paid in kind [16],[35]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00%      
Number of Shares | shares [35]               42,141,600 42,141,600 42,141,600 42,141,600 42,141,600 42,141,600      
Amortized Cost [35]               $ (39,600,000)                
Fair Value [4],[35]               $ (42,300,000)                
Investment, Identifier [Axis]: Cubic Corp, Preferred Stock | Maximum                                
Interest rate, paid in kind [16],[35]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00%      
Investment, Identifier [Axis]: Cubic Corp, Preferred Stock, Equity/Other, Software & Services                                
Interest rate, paid in kind [7],[10] 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%                    
Number of Shares | shares [10] 42,141,600 42,141,600 42,141,600 42,141,600 42,141,600 42,141,600                    
Amortized Cost [10] $ (39,700,000)                              
Fair Value [3],[10] $ (35,100,000)                              
Investment, Identifier [Axis]: Cubic Corp, Preferred Stock, Equity/Other, Software & Services | Maximum                                
Interest rate, paid in kind [7],[10] 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%                    
Investment, Identifier [Axis]: Cubic Corp, Senior Secured Loans -Second Lien, Software & Services                                
Variable rate [7],[10] 7.63% 7.63% 7.63% 7.63% 7.63% 7.63%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 44,800,000                              
Amortized Cost [10] (42,100,000)                              
Fair Value [3],[10] $ (41,000,000.0)                              
Investment, Identifier [Axis]: Datatel Inc                                
Variable rate [16],[35]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 179,200,000                
Amortized Cost [35]               (170,100,000)                
Fair Value [4],[35]               $ (184,600,000)                
Investment, Identifier [Axis]: Dental Care Alliance Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 1                                
Variable rate [7],[10],[13],[23],[24],[44] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[10],[13],[23],[24],[44] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[13],[15],[23],[24],[44] $ 131,300,000                              
Amortized Cost [10],[13],[23],[24],[44] (127,400,000)                              
Fair Value [3],[10],[13],[23],[24],[44] $ (129,500,000)                              
Investment, Identifier [Axis]: Dental Care Alliance Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 2                                
Variable rate [7],[22] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount | £ [15],[22]         £ 6.1                      
Amortized Cost [22] $ (6,100,000)                              
Fair Value [3],[22] $ (6,000,000.0)                              
Investment, Identifier [Axis]: Dental Care Alliance Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services -1                                
Variable rate [16],[19],[35],[42],[43],[47]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [19],[35],[42],[43],[47]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[19],[35],[42],[43],[47]               $ 90,300,000                
Amortized Cost [19],[35],[42],[43],[47]               (86,100,000)                
Fair Value [4],[19],[35],[42],[43],[47]               $ (90,400,000)                
Investment, Identifier [Axis]: Dental Care Alliance Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services -2                                
Variable rate [16],[35]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[35]               $ 8,700,000                
Amortized Cost [35]               (8,700,000)                
Fair Value [4],[35]               $ (8,700,000)                
Investment, Identifier [Axis]: Dental Care Alliance Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services -3                                
Variable rate [16],[17]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 13,600,000                
Amortized Cost [17]               (13,600,000)                
Fair Value [4],[17]               $ (13,700,000)                
Investment, Identifier [Axis]: Element Materials Technology Group US Holdings Inc                                
Variable rate [16],[29],[35],[40]               3.50% 3.50% 3.50% 3.50% 3.50% 3.50%      
Base Rate Floor [29],[35],[40]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[29],[35],[40]               $ 1,900,000                
Amortized Cost [29],[35],[40]               (1,900,000)                
Fair Value [4],[29],[35],[40]               $ (1,900,000)                
Investment, Identifier [Axis]: Element Materials Technology Group US Holdings Inc, Senior Secured Loans - First Lien, Commercial & Professional Services 1                                
Variable rate [7],[10],[11],[41] 4.25% 4.25% 4.25% 4.25% 4.25% 4.25%                    
Base Rate Floor [7],[10],[11],[41] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount [10],[11],[15],[41] $ 300,000                              
Amortized Cost [10],[11],[41] (400,000)                              
Fair Value [3],[10],[11],[41] $ (300,000)                              
Investment, Identifier [Axis]: Element Materials Technology Group US Holdings Inc, Senior Secured Loans - First Lien, Commercial & Professional Services 2                                
Variable rate [7],[10],[11],[41] 4.25% 4.25% 4.25% 4.25% 4.25% 4.25%                    
Base Rate Floor [7],[10],[11],[41] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                    
Principal amount [10],[11],[15],[41] $ 1,400,000                              
Amortized Cost [10],[11],[41] (1,400,000)                              
Fair Value [3],[10],[11],[41] $ (1,300,000)                              
Investment, Identifier [Axis]: Element Materials Technology Group US Holdings Inc, Senior Secured Loans -Second Lien, Commercial & Professional Services                                
Variable rate [7],[10],[11] 7.25% 7.25% 7.25% 7.25% 7.25% 7.25%                    
Base Rate Floor [7],[10],[11] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                    
Principal amount [10],[11],[15] $ 5,000,000.0                              
Amortized Cost [10],[11] (5,700,000)                              
Fair Value [3],[10],[11] $ (5,300,000)                              
Investment, Identifier [Axis]: Element Materials Technology Group US Holdings Inc, Subordinated Debt, Commercial & Professional Services                                
Interest rate, paid in kind [7],[10],[11] 8.50% 8.50% 8.50% 8.50% 8.50% 8.50%                    
Base Rate Floor [7],[10],[11] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                    
Principal amount [10],[11],[15] $ 65,900,000                              
Amortized Cost [10],[11] (64,400,000)                              
Fair Value [3],[10],[11] $ (63,200,000)                              
Investment, Identifier [Axis]: Element Materials Technology Group US Holdings Inc, Subordinated Debt, Commercial & Professional Services | Maximum                                
Interest rate, paid in kind [7],[10],[11] 8.50% 8.50% 8.50% 8.50% 8.50% 8.50%                    
Investment, Identifier [Axis]: Ellucian Inc, Senior Secured Loans -Second Lien, Software & Services                                
Variable rate [7],[10] 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 179,200,000                              
Amortized Cost [10] (170,800,000)                              
Fair Value [3],[10] $ (178,100,000)                              
Investment, Identifier [Axis]: Encora Digital Inc                                
Interest rate, paid in kind [16],[35]               9.80% 9.80% 9.80% 9.80% 9.80% 9.80%      
Principal amount [18],[35]               $ 21,600,000                
Amortized Cost [35]               (20,900,000)                
Fair Value [4],[35]               $ (20,900,000)                
Investment, Identifier [Axis]: Encora Digital Inc | Maximum                                
Interest rate, paid in kind [16],[35]               9.80% 9.80% 9.80% 9.80% 9.80% 9.80%      
Investment, Identifier [Axis]: Encora Digital Inc, Senior Secured Loans - First Lien, Software & Services 1                                
Variable rate [7],[10] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Interest rate, paid in kind [7],[10] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 65,100,000                              
Amortized Cost [10] (63,900,000)                              
Fair Value [3],[10] $ (62,100,000)                              
Investment, Identifier [Axis]: Encora Digital Inc, Senior Secured Loans - First Lien, Software & Services 1 | Maximum                                
Interest rate, paid in kind [7],[10] 2.40% 2.40% 2.40% 2.40% 2.40% 2.40%                    
Investment, Identifier [Axis]: Encora Digital Inc, Senior Secured Loans - First Lien, Software & Services 2                                
Variable rate [7],[22] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 19,600,000                              
Amortized Cost [22] (19,400,000)                              
Fair Value [3],[22] $ (18,700,000)                              
Investment, Identifier [Axis]: Encora Digital Inc, Senior Secured Loans—First Lien, Software & Services -1                                
Variable rate [16],[35]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Interest rate, paid in kind [16],[35]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Base Rate Floor [35]               0.50% 0.50% 0.50% 0.50% 0.50% 0.50%      
Principal amount [18],[35]               $ 81,300,000                
Amortized Cost [35]               (79,700,000)                
Fair Value [4],[35]               $ (79,700,000)                
Investment, Identifier [Axis]: Encora Digital Inc, Senior Secured Loans—First Lien, Software & Services -1 | Maximum                                
Interest rate, paid in kind [16],[35]               2.40% 2.40% 2.40% 2.40% 2.40% 2.40%      
Investment, Identifier [Axis]: Encora Digital Inc, Senior Secured Loans—First Lien, Software & Services -2                                
Variable rate [16],[17]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [17]               0.50% 0.50% 0.50% 0.50% 0.50% 0.50%      
Principal amount [17],[18]               $ 19,600,000                
Amortized Cost [17]               (19,400,000)                
Fair Value [4],[17]               $ (19,200,000)                
Investment, Identifier [Axis]: Encora Digital Inc, Subordinated Debt, Software & Services                                
Interest rate, paid in kind [7],[10] 9.80% 9.80% 9.80% 9.80% 9.80% 9.80%                    
Principal amount | € [10],[15]       € 22.6                        
Amortized Cost [10] $ (22,000,000.0)                              
Fair Value [3],[10] $ (21,400,000)                              
Investment, Identifier [Axis]: Encora Digital Inc, Subordinated Debt, Software & Services | Maximum                                
Interest rate, paid in kind [7],[10] 9.80% 9.80% 9.80% 9.80% 9.80% 9.80%                    
Investment, Identifier [Axis]: Entertainment Benefits Group LLC, Senior Secured Loans—First Lien Media & Entertainment, September 30, 2024 -1                                
Variable rate [16],[35]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Interest rate, paid in kind [16],[35]               2.50% 2.50% 2.50% 2.50% 2.50% 2.50%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 400,000                
Amortized Cost [35]               (400,000)                
Fair Value [4],[35]               $ (400,000)                
Investment, Identifier [Axis]: Entertainment Benefits Group LLC, Senior Secured Loans—First Lien Media & Entertainment, September 30, 2024 -1 | Maximum                                
Interest rate, paid in kind [16],[35]               2.50% 2.50% 2.50% 2.50% 2.50% 2.50%      
Investment, Identifier [Axis]: Entertainment Benefits Group LLC, Senior Secured Loans—First Lien Media & Entertainment, September 30, 2024 -2                                
Variable rate [16],[17]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Interest rate, paid in kind [16],[17]               2.50% 2.50% 2.50% 2.50% 2.50% 2.50%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 10,200,000                
Amortized Cost [17]               (9,600,000)                
Fair Value [4],[17]               $ (9,900,000)                
Investment, Identifier [Axis]: Entertainment Benefits Group LLC, Senior Secured Loans—First Lien Media & Entertainment, September 30, 2024 -2 | Maximum                                
Interest rate, paid in kind [16],[17]               2.50% 2.50% 2.50% 2.50% 2.50% 2.50%      
Investment, Identifier [Axis]: Entertainment Benefits Group LLC, Senior Secured Loans—First Lien Media & Entertainment, September 30, 2025                                
Variable rate [16],[19],[20],[35],[43],[47]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Interest rate, paid in kind [16],[19],[20],[35],[43],[47]               2.50% 2.50% 2.50% 2.50% 2.50% 2.50%      
Base Rate Floor [19],[20],[35],[43],[47]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[19],[20],[35],[43],[47]               $ 64,000,000.0                
Amortized Cost [19],[20],[35],[43],[47]               (59,100,000)                
Fair Value [4],[19],[20],[35],[43],[47]               $ (61,700,000)                
Investment, Identifier [Axis]: Entertainment Benefits Group LLC, Senior Secured Loans—First Lien Media & Entertainment, September 30, 2025 | Maximum                                
Interest rate, paid in kind [16],[19],[20],[35],[43],[47]               2.50% 2.50% 2.50% 2.50% 2.50% 2.50%      
Investment, Identifier [Axis]: Envigo Laboratories Inc, Series A Warrant                                
Number of Shares | shares [28],[37]               10,924 10,924 10,924 10,924 10,924 10,924      
Amortized Cost [28],[37]               $ 0                
Fair Value [4],[28],[37]               $ 0                
Investment, Identifier [Axis]: Envigo Laboratories Inc, Series A Warrant, Equity/Other, Health Care Equipment & Services                                
Number of Shares | shares [33],[39] 10,924 10,924 10,924 10,924 10,924 10,924                    
Amortized Cost [33],[39] $ 0                              
Fair Value [3],[33],[39] $ 0                              
Investment, Identifier [Axis]: Envigo Laboratories Inc, Series B Warrant                                
Number of Shares | shares [28],[37]               17,515 17,515 17,515 17,515 17,515 17,515      
Amortized Cost [28],[37]               $ 0                
Fair Value [4],[28],[37]               $ 0                
Investment, Identifier [Axis]: Envigo Laboratories Inc, Series B Warrant, Equity/Other, Health Care Equipment & Services                                
Number of Shares | shares [33],[39] 17,515 17,515 17,515 17,515 17,515 17,515                    
Amortized Cost [33],[39] $ 0                              
Fair Value [3],[33],[39] $ 0                              
Investment, Identifier [Axis]: Envirotainer Ltd, Senior Secured Loans - First Lien, Transportation                                
Variable rate [7],[11],[22] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Interest rate, paid in kind [7],[11],[22] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Base Rate Floor [7],[11],[22] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount [11],[15],[22] $ 2,700,000                              
Amortized Cost [11],[22] (2,700,000)                              
Fair Value [3],[11],[22] $ (2,700,000)                              
Investment, Identifier [Axis]: Envirotainer Ltd, Senior Secured Loans - First Lien, Transportation | Maximum                                
Interest rate, paid in kind [7],[11],[22] 3.00% 3.00% 3.00% 3.00% 3.00% 3.00%                    
Investment, Identifier [Axis]: Excelitas Technologies Corp, Senior Secured Loans - First Lien, Technology Hardware & Equipment 1                                
Variable rate [7],[10] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 1,000,000.0                              
Amortized Cost [10] (1,000,000.0)                              
Fair Value [3],[10] $ (1,000,000.0)                              
Investment, Identifier [Axis]: Excelitas Technologies Corp, Senior Secured Loans - First Lien, Technology Hardware & Equipment 2                                
Variable rate [7],[10] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[10] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount | € [10],[15]       € 4.1                        
Amortized Cost [10] $ (4,100,000)                              
Fair Value [3],[10] $ (3,900,000)                              
Investment, Identifier [Axis]: Excelitas Technologies Corp, Senior Secured Loans - First Lien, Technology Hardware & Equipment 3                                
Variable rate [7],[22] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 1,400,000                              
Amortized Cost [22] (1,400,000)                              
Fair Value [3],[22] $ (1,400,000)                              
Investment, Identifier [Axis]: Excelitas Technologies Corp, Senior Secured Loans - First Lien, Technology Hardware & Equipment 4                                
Variable rate [7],[22] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 4,700,000                              
Amortized Cost [22] (4,700,000)                              
Fair Value [3],[22] $ (4,700,000)                              
Investment, Identifier [Axis]: Fairway Group Holdings Corp                                
Interest rate, paid in kind [16],[25],[28],[35],[45]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00%      
Principal amount [18],[25],[28],[35],[45]               $ 6,900,000                
Amortized Cost [25],[28],[35],[45]               0                
Fair Value [4],[25],[28],[35],[45]               $ 0                
Investment, Identifier [Axis]: Fairway Group Holdings Corp | Maximum                                
Interest rate, paid in kind [16],[25],[28],[35],[45]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00%      
Investment, Identifier [Axis]: Fairway Group Holdings Corp, Common Stock                                
Number of Shares | shares [28],[35],[45]               103,091 103,091 103,091 103,091 103,091 103,091      
Amortized Cost [28],[35],[45]               $ 0                
Fair Value [4],[28],[35],[45]               $ 0                
Investment, Identifier [Axis]: Fairway Group Holdings Corp, Senior Secured Loans—First Lien, Food & Staples Retailing, November 27, 2023                                
Interest rate, paid in kind [16],[25],[28],[35],[45]               12.00% 12.00% 12.00% 12.00% 12.00% 12.00%      
Principal amount [18],[25],[28],[35],[45]               $ 11,700,000                
Amortized Cost [25],[28],[35],[45]               (1,000,000.0)                
Fair Value [4],[25],[28],[35],[45]               $ (700,000)                
Investment, Identifier [Axis]: Fairway Group Holdings Corp, Senior Secured Loans—First Lien, Food & Staples Retailing, November 27, 2023 | Maximum                                
Interest rate, paid in kind [16],[25],[28],[35],[45]               12.00% 12.00% 12.00% 12.00% 12.00% 12.00%      
Investment, Identifier [Axis]: Fairway Group Holdings Corp, Senior Secured Loans—First Lien, Food & Staples Retailing, November 28, 2023                                
Interest rate, paid in kind [16],[25],[28],[35],[45]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00%      
Principal amount [18],[25],[28],[35],[45]               $ 7,600,000                
Amortized Cost [25],[28],[35],[45]               0                
Fair Value [4],[25],[28],[35],[45]               $ 0                
Investment, Identifier [Axis]: Fairway Group Holdings Corp, Senior Secured Loans—First Lien, Food & Staples Retailing, November 28, 2023 | Maximum                                
Interest rate, paid in kind [16],[25],[28],[35],[45]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00%      
Investment, Identifier [Axis]: Follett Software Co, Senior Secured Loans - First Lien, Software & Services 1                                
Variable rate [7],[13],[14],[23],[24] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[13],[14],[23],[24] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [13],[14],[15],[23],[24] $ 73,900,000                              
Amortized Cost [13],[14],[23],[24] (73,200,000)                              
Fair Value [3],[13],[14],[23],[24] $ (72,300,000)                              
Investment, Identifier [Axis]: Follett Software Co, Senior Secured Loans - First Lien, Software & Services 2                                
Variable rate [7],[22] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 9,900,000                              
Amortized Cost [22] (9,900,000)                              
Fair Value [3],[22] $ (9,700,000)                              
Investment, Identifier [Axis]: Follett Software Co, Senior Secured Loans—First Lien, Software & Services, August 31, 2027t 2027                                
Variable rate [16],[17]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 9,900,000                
Amortized Cost [17]               (9,900,000)                
Fair Value [4],[17]               $ (9,800,000)                
Investment, Identifier [Axis]: Follett Software Co, Senior Secured Loans—First Lien, Software & Services, August 31, 2028                                
Variable rate [16]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [19],[20],[42],[47]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[19],[20],[42],[47]               $ 74,400,000                
Amortized Cost [19],[20],[42],[47]               (73,700,000)                
Fair Value [4],[19],[20],[42],[47]               $ (74,100,000)                
Investment, Identifier [Axis]: Foundation Consumer Brands LLC, Senior Secured Loans - First Lien, Pharmaceuticals, Biotechnology & Life Sciences 1                                
Variable rate [7],[10],[44] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[10],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[44] $ 85,600,000                              
Amortized Cost [10],[44] (82,100,000)                              
Fair Value [3],[10],[44] $ (86,500,000)                              
Investment, Identifier [Axis]: Foundation Consumer Brands LLC, Senior Secured Loans - First Lien, Pharmaceuticals, Biotechnology & Life Sciences 2                                
Variable rate [7],[22] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 6,600,000                              
Amortized Cost [22] (6,600,000)                              
Fair Value [3],[22] $ (6,600,000)                              
Investment, Identifier [Axis]: Foundation Consumer Brands LLC, Senior Secured Loans—First Lien, Pharmaceuticals, Biotechnology & Life Sciences, February 12, 2027 -1                                
Variable rate [16],[35],[43]               6.38% 6.38% 6.38% 6.38% 6.38% 6.38%      
Base Rate Floor [35],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[43]               $ 97,100,000                
Amortized Cost [35],[43]               (93,000,000.0)                
Fair Value [4],[35],[43]               $ (98,000,000.0)                
Investment, Identifier [Axis]: Foundation Consumer Brands LLC, Senior Secured Loans—First Lien, Pharmaceuticals, Biotechnology & Life Sciences, February 12, 2027 -2                                
Variable rate [16],[17]               6.38% 6.38% 6.38% 6.38% 6.38% 6.38%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 6,600,000                
Amortized Cost [17]               (6,600,000)                
Fair Value [4],[17]               $ (6,600,000)                
Investment, Identifier [Axis]: Foundation Risk Partners Corp, Senior Secured Loans - First Lien, Insurance 1                                
Variable rate [7],[10] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 400,000                              
Amortized Cost [10] (300,000)                              
Fair Value [3],[10] $ (400,000)                              
Investment, Identifier [Axis]: Foundation Risk Partners Corp, Senior Secured Loans - First Lien, Insurance 2                                
Variable rate [7],[10] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 65,800,000                              
Amortized Cost [10] (64,900,000)                              
Fair Value [3],[10] $ (64,000,000.0)                              
Investment, Identifier [Axis]: Foundation Risk Partners Corp, Senior Secured Loans - First Lien, Insurance 3                                
Variable rate [7],[10] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 14,300,000                              
Amortized Cost [10] (14,200,000)                              
Fair Value [3],[10] $ (13,900,000)                              
Investment, Identifier [Axis]: Foundation Risk Partners Corp, Senior Secured Loans - First Lien, Insurance 4                                
Variable rate [7],[22] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 6,600,000                              
Amortized Cost [22] (6,600,000)                              
Fair Value [3],[22] $ (6,400,000)                              
Investment, Identifier [Axis]: Foundation Risk Partners Corp, Senior Secured Loans—First Lien, Insurance, Maturing October 29, 2027                                
Variable rate [16],[17]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 7,000,000.0                
Amortized Cost [17]               (6,900,000)                
Fair Value [4],[17]               $ (6,900,000)                
Investment, Identifier [Axis]: Foundation Risk Partners Corp, Senior Secured Loans—First Lien, Insurance, Maturing October 29, 2028 -1                                
Variable rate [16],[35]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[35]               $ 74,300,000                
Amortized Cost [35]               (73,200,000)                
Fair Value [4],[35]               $ (73,300,000)                
Investment, Identifier [Axis]: Foundation Risk Partners Corp, Senior Secured Loans—First Lien, Insurance, Maturing October 29, 2028 -2                                
Variable rate [16],[17]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 6,200,000                
Amortized Cost [17]               (6,200,000)                
Fair Value [4],[17]               $ (6,100,000)                
Investment, Identifier [Axis]: Fox Head Inc, Common Stock                                
Number of Shares | shares [28],[35],[57]               10,000,000 10,000,000 10,000,000 10,000,000 10,000,000 10,000,000      
Amortized Cost [28],[35],[57]               $ (8,000,000.0)                
Fair Value [4],[28],[35],[57]               $ (10,900,000)                
Investment, Identifier [Axis]: Fox Head Inc, Common Stock, Equity/Other, Consumer Durables & Apparel                                
Number of Shares | shares [8],[10] 10,000,000 10,000,000 10,000,000 10,000,000 10,000,000 10,000,000                    
Amortized Cost [8],[10] $ (2,900,000)                              
Fair Value [3],[8],[10] $ (600,000)                              
Investment, Identifier [Axis]: Frontline Technologies Group LLC, Senior Secured Loans - First Lien, Software & Services 1                                
Variable rate [7],[10],[12],[44] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[10],[12],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[12],[15],[44] $ 22,900,000                              
Amortized Cost [10],[12],[44] (22,800,000)                              
Fair Value [3],[10],[12],[44] $ (22,900,000)                              
Investment, Identifier [Axis]: Frontline Technologies Group LLC, Senior Secured Loans - First Lien, Software & Services 2                                
Variable rate [7],[39] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[39] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[39] $ 26,700,000                              
Amortized Cost [39] (25,800,000)                              
Fair Value [3],[39] $ (26,900,000)                              
Investment, Identifier [Axis]: Frontline Technologies Group LLC, Senior Secured Loans - First Lien, Software & Services 3                                
Variable rate [7],[10] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 10,900,000                              
Amortized Cost [10] (10,500,000)                              
Fair Value [3],[10] $ (11,000,000.0)                              
Investment, Identifier [Axis]: Frontline Technologies Group LLC, Senior Secured Loans—First Lien, Software & Services -1                                
Variable rate [16],[21],[35],[43]               5.25% 5.25% 5.25% 5.25% 5.25% 5.25%      
Base Rate Floor [21],[35],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[21],[35],[43]               $ 78,700,000                
Amortized Cost [21],[35],[43]               (78,100,000)                
Fair Value [4],[21],[35],[43]               $ (78,700,000)                
Investment, Identifier [Axis]: Frontline Technologies Group LLC, Senior Secured Loans—First Lien, Software & Services -2                                
Variable rate [16],[35],[37]               5.25% 5.25% 5.25% 5.25% 5.25% 5.25%      
Base Rate Floor [35],[37]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[37]               $ 75,600,000                
Amortized Cost [35],[37]               (71,700,000)                
Fair Value [4],[35],[37]               $ (76,200,000)                
Investment, Identifier [Axis]: Fronton BV, Common Stock                                
Number of Shares | shares [28],[45],[58]               14,943 14,943 14,943 14,943 14,943 14,943      
Amortized Cost [28],[45],[58]               $ 0                
Fair Value [4],[28],[45],[58]               $ (1,400,000)                
Investment, Identifier [Axis]: Fronton BV, Common Stock, Equity/Other, Consumer Services                                
Number of Shares | shares [33],[46],[59] 14,943 14,943 14,943 14,943 14,943 14,943                    
Amortized Cost [33],[46],[59] $ 0                              
Fair Value [3],[33],[46],[59] $ (1,100,000)                              
Investment, Identifier [Axis]: Galaxy Universal LLC                                
Variable rate [16],[35]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 36,200,000                
Amortized Cost [35]               (35,800,000)                
Fair Value [4],[35]               $ (35,800,000)                
Investment, Identifier [Axis]: Galaxy Universal LLC, Common Stock                                
Number of Shares | shares [28],[35]               228,806 228,806 228,806 228,806 228,806 228,806      
Amortized Cost [28],[35]               $ (35,500,000)                
Fair Value [4],[28],[35]               $ (35,500,000)                
Investment, Identifier [Axis]: Galaxy Universal LLC, Common Stock, Equity/Other, Consumer Durables & Apparel                                
Number of Shares | shares [33],[55] 228,806 228,806 228,806 228,806 228,806 228,806                    
Amortized Cost [33],[55] $ (35,500,000)                              
Fair Value [3],[33],[55] $ (14,900,000)                              
Investment, Identifier [Axis]: Galaxy Universal LLC, Senior Secured Loans - First Lien, Consumer Durables & Apparel 1                                
Variable rate [7],[10] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[10] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount [10],[15] $ 7,500,000                              
Amortized Cost [10] (7,500,000)                              
Fair Value [3],[10] $ (7,500,000)                              
Investment, Identifier [Axis]: Galaxy Universal LLC, Senior Secured Loans - First Lien, Consumer Durables & Apparel 2                                
Variable rate [7],[10] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 88,300,000                              
Amortized Cost [10] (88,300,000)                              
Fair Value [3],[10] $ (86,800,000)                              
Investment, Identifier [Axis]: Galaxy Universal LLC, Senior Secured Loans - First Lien, Consumer Durables & Apparel 3                                
Variable rate [7],[10] 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 22,500,000                              
Amortized Cost [10] (22,300,000)                              
Fair Value [3],[10] $ (22,300,000)                              
Investment, Identifier [Axis]: Galaxy Universal LLC, Senior Secured Loans—First Lien, Consumer Durables & Apparel, Maturing February 4,2022 -1                                
Variable rate [16],[35]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00%      
Principal amount [18],[35]               $ 900,000                
Amortized Cost [35]               (900,000)                
Fair Value [4],[35]               $ (900,000)                
Investment, Identifier [Axis]: Galaxy Universal LLC, Senior Secured Loans—First Lien, Consumer Durables & Apparel, Maturing February 4,2022 -2                                
Variable rate [16],[17]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00%      
Principal amount [17],[18]               $ 7,700,000                
Amortized Cost [17]               (7,700,000)                
Fair Value [4],[17]               $ (7,700,000)                
Investment, Identifier [Axis]: Galaxy Universal LLC, Senior Secured Loans—First Lien, Consumer Durables & Apparel, November 1, 2026                                
Variable rate [16],[35]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 88,900,000                
Amortized Cost [35]               (88,900,000)                
Fair Value [4],[35]               $ (88,900,000)                
Investment, Identifier [Axis]: Galaxy Universal LLC, Trade Claim                                
Number of Shares | shares [28],[35]               27,256,114 27,256,114 27,256,114 27,256,114 27,256,114 27,256,114      
Amortized Cost [28],[35]               $ (16,400,000)                
Fair Value [4],[28],[35]               $ (16,400,000)                
Investment, Identifier [Axis]: Galaxy Universal LLC, Trade Claim, Equity/Other, Consumer Durables & Apparel                                
Number of Shares | shares [10],[33] 6,723,167 6,723,167 6,723,167 6,723,167 6,723,167 6,723,167                    
Amortized Cost [10],[33] $ (4,000,000.0)                              
Fair Value [3],[10],[33] $ (1,500,000)                              
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Senior Secured Loans - First Lien, Insurance 1                                
Variable rate [7],[10],[13],[14],[24],[44] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                    
Interest rate, paid in kind [7],[10],[13],[14],[24],[44] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Base Rate Floor [7],[10],[13],[14],[24],[44] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[13],[14],[15],[24],[44] $ 105,600,000                              
Amortized Cost [10],[13],[14],[24],[44] (103,800,000)                              
Fair Value [3],[10],[13],[14],[24],[44] $ (103,800,000)                              
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Senior Secured Loans - First Lien, Insurance 1 | Maximum                                
Interest rate, paid in kind [7],[10],[13],[14],[24],[44] 1.30% 1.30% 1.30% 1.30% 1.30% 1.30%                    
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Senior Secured Loans - First Lien, Insurance 2                                
Variable rate [7],[22] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                    
Interest rate, paid in kind [7],[22] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 12,000,000.0                              
Amortized Cost [22] (11,800,000)                              
Fair Value [3],[22] $ (11,800,000)                              
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Senior Secured Loans - First Lien, Insurance 2 | Maximum                                
Interest rate, paid in kind [7],[22] 1.30% 1.30% 1.30% 1.30% 1.30% 1.30%                    
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Senior Secured Loans - First Lien, Insurance 3                                
Variable rate [7],[22] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                    
Interest rate, paid in kind [7],[22] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 7,100,000                              
Amortized Cost [22] (7,100,000)                              
Fair Value [3],[22] $ (7,000,000.0)                              
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Senior Secured Loans - First Lien, Insurance 3 | Maximum                                
Interest rate, paid in kind [7],[22] 1.30% 1.30% 1.30% 1.30% 1.30% 1.30%                    
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Senior Secured Loans—First Lien, Insurance, Maturing September 29, 2028 -1                                
Variable rate [16],[19],[20],[35],[42]               5.25% 5.25% 5.25% 5.25% 5.25% 5.25%      
Interest rate, paid in kind [16],[19],[20],[35],[42]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Base Rate Floor [19],[20],[35],[42]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[19],[20],[35],[42]               $ 128,100,000                
Amortized Cost [19],[20],[35],[42]               (125,500,000)                
Fair Value [4],[19],[20],[35],[42]               $ (126,000,000.0)                
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Senior Secured Loans—First Lien, Insurance, Maturing September 29, 2028 -1 | Maximum                                
Interest rate, paid in kind [16],[19],[20],[35],[42]               1.30% 1.30% 1.30% 1.30% 1.30% 1.30%      
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Senior Secured Loans—First Lien, Insurance, Maturing September 29, 2028 -2                                
Interest rate, paid in kind [16],[17]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 22,400,000                
Amortized Cost [17]               (22,400,000)                
Fair Value [4],[17]               $ (22,000,000.0)                
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Senior Secured Loans—First Lien, Insurance, Maturing September 29, 2028 -2 | Maximum                                
Interest rate, paid in kind [16],[17]               1.30% 1.30% 1.30% 1.30% 1.30% 1.30%      
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Senior Secured Loans—First Lien, Insurance, Maturing September 30, 2027                                
Variable rate [16],[17]               5.25% 5.25% 5.25% 5.25% 5.25% 5.25%      
Interest rate, paid in kind [16],[17]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 12,000,000.0                
Amortized Cost [17]               (11,700,000)                
Fair Value [4],[17]               $ (11,800,000)                
Investment, Identifier [Axis]: Galway Partners Holdings LLC, Senior Secured Loans—First Lien, Insurance, Maturing September 30, 2027 | Maximum                                
Interest rate, paid in kind [16],[17]               1.30% 1.30% 1.30% 1.30% 1.30% 1.30%      
Investment, Identifier [Axis]: General Datatech LP                                
Variable rate [16],[19],[20],[35],[42],[43],[47]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [19],[20],[35],[42],[43],[47]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[19],[20],[35],[42],[43],[47]               $ 169,100,000                
Amortized Cost [19],[20],[35],[42],[43],[47]               (167,500,000)                
Fair Value [4],[19],[20],[35],[42],[43],[47]               $ (166,500,000)                
Investment, Identifier [Axis]: General Datatech LP, Senior Secured Loans - First Lien, Software & Services 1                                
Variable rate [7],[10],[13],[14],[23],[24],[44] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10],[13],[14],[23],[24],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[13],[14],[15],[23],[24],[44] $ 157,400,000                              
Amortized Cost [10],[13],[14],[23],[24],[44] (156,100,000)                              
Fair Value [3],[10],[13],[14],[23],[24],[44] $ (148,700,000)                              
Investment, Identifier [Axis]: Genesys Telecommunications Laboratories Inc, Class A Shares                                
Number of Shares | shares [28],[35]               40,529 40,529 40,529 40,529 40,529 40,529      
Amortized Cost [28],[35]               $ 0                
Fair Value [4],[28],[35]               $ 0                
Investment, Identifier [Axis]: Genesys Telecommunications Laboratories Inc, Class A Shares, Equity/Other, Technology Hardware & Equipment                                
Number of Shares | shares [10] 40,529 40,529 40,529 40,529 40,529 40,529                    
Amortized Cost [10] $ 0                              
Fair Value [3],[10] $ 0                              
Investment, Identifier [Axis]: Genesys Telecommunications Laboratories Inc, Ordinary Shares                                
Number of Shares | shares [28],[35]               41,339 41,339 41,339 41,339 41,339 41,339      
Amortized Cost [28],[35]               $ 0                
Fair Value [4],[28],[35]               $ 0                
Investment, Identifier [Axis]: Genesys Telecommunications Laboratories Inc, Ordinary Shares, Equity/Other, Technology Hardware & Equipment                                
Number of Shares | shares [33] 41,339 41,339 41,339 41,339 41,339 41,339                    
Amortized Cost [33] $ 0                              
Fair Value [3],[33] $ 0                              
Investment, Identifier [Axis]: Genesys Telecommunications Laboratories Inc, Preferred Stock                                
Number of Shares | shares [28],[35]               1,050,465 1,050,465 1,050,465 1,050,465 1,050,465 1,050,465      
Amortized Cost [28],[35]               $ 0                
Fair Value [4],[28],[35]               $ 0                
Investment, Identifier [Axis]: Genesys Telecommunications Laboratories Inc, Preferred Stock, Equity/Other, Technology Hardware & Equipment                                
Number of Shares | shares [33] 1,050,465 1,050,465 1,050,465 1,050,465 1,050,465 1,050,465                    
Amortized Cost [33] $ 0                              
Fair Value [3],[33] $ 0                              
Investment, Identifier [Axis]: Gigamon Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 1                                
Variable rate [7],[10] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 25,900,000                              
Amortized Cost [10] (26,800,000)                              
Fair Value [3],[10] $ (23,600,000)                              
Investment, Identifier [Axis]: Gigamon Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 2                                
Interest rate, paid in kind [7],[10] 12.00% 12.00% 12.00% 12.00% 12.00% 12.00%                    
Principal amount [10],[15] $ 22,200,000                              
Amortized Cost [10] (22,800,000)                              
Fair Value [3],[10] $ (15,900,000)                              
Investment, Identifier [Axis]: Gigamon Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 2 | Maximum                                
Interest rate, paid in kind [7],[10] 12.00% 12.00% 12.00% 12.00% 12.00% 12.00%                    
Investment, Identifier [Axis]: Gigamon Inc, Senior Secured Loans - First Lien, Software & Services 2                                
Variable rate [7],[10] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 170,900,000                              
Amortized Cost [10] (169,300,000)                              
Fair Value [3],[10] $ (165,300,000)                              
Investment, Identifier [Axis]: Gigamon Inc, Senior Secured Loans - First Lien, Software & Services 3                                
Variable rate [7],[22] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 9,300,000                              
Amortized Cost [22] (9,300,000)                              
Fair Value [3],[22] $ (9,000,000.0)                              
Investment, Identifier [Axis]: Global Jet Capital LLC, Preferred Stock, Asset Based Finance, Commercial & Professional Services -1                                
Number of Shares | shares [28],[35],[56],[57]               149,494,590 149,494,590 149,494,590 149,494,590 149,494,590 149,494,590      
Amortized Cost [28],[35],[56],[57]               $ (69,400,000)                
Fair Value [4],[28],[35],[56],[57]               $ 0                
Investment, Identifier [Axis]: Global Jet Capital LLC, Preferred Stock, Asset Based Finance, Commercial & Professional Services -2                                
Investment interest rate [16],[35],[56],[57]               9.00% 9.00% 9.00% 9.00% 9.00% 9.00%      
Interest rate, paid in kind [16],[35],[56],[57]               9.00% 9.00% 9.00% 9.00% 9.00% 9.00%      
Principal amount [18],[35],[56],[57]               $ 414,000,000.0                
Amortized Cost [35],[56],[57]               (304,800,000)                
Fair Value [4],[35],[56],[57]               $ (302,200,000)                
Investment, Identifier [Axis]: Global Jet Capital LLC, Preferred Stock, Asset Based Finance, Commercial & Professional Services 1                                
Interest rate, paid in kind [7],[8],[9],[10],[30],[33] 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%                    
Number of Shares | shares [8],[9],[10],[33] 149,494,590 149,494,590 149,494,590 149,494,590 149,494,590 149,494,590                    
Amortized Cost [8],[9],[10],[33] $ (69,400,000)                              
Fair Value [3],[8],[9],[10],[33] $ 0                              
Investment, Identifier [Axis]: Global Jet Capital LLC, Preferred Stock, Asset Based Finance, Commercial & Professional Services 1 | Maximum                                
Interest rate, paid in kind [7],[8],[9],[10],[30],[33] 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%                    
Investment, Identifier [Axis]: Global Jet Capital LLC, Preferred Stock, Asset Based Finance, Commercial & Professional Services 2                                
Principal amount [8],[9],[10],[15],[30],[33] $ 442,900,000                              
Amortized Cost [8],[9],[10],[30],[33] (309,400,000)                              
Fair Value [3],[8],[9],[10],[30],[33] $ (232,000,000.0)                              
Investment, Identifier [Axis]: Global Jet Capital LLC, Structured Mezzanine, Asset Based Finance, Commercial & Professional Services -1                                
Investment interest rate [16],[29],[35],[56],[57]               15.00% 15.00% 15.00% 15.00% 15.00% 15.00%      
Interest rate, paid in kind [16],[29],[35],[56],[57]               15.00% 15.00% 15.00% 15.00% 15.00% 15.00%      
Principal amount [18],[29],[35],[56],[57]               $ 53,600,000                
Amortized Cost [29],[35],[56],[57]               (36,900,000)                
Fair Value [4],[29],[35],[56],[57]               $ (53,600,000)                
Investment, Identifier [Axis]: Global Jet Capital LLC, Structured Mezzanine, Asset Based Finance, Commercial & Professional Services -2                                
Investment interest rate [16],[29],[35],[56],[57]               15.00% 15.00% 15.00% 15.00% 15.00% 15.00%      
Interest rate, paid in kind [16],[29],[35],[56],[57]               15.00% 15.00% 15.00% 15.00% 15.00% 15.00%      
Principal amount [18],[29],[35],[56],[57]               $ 39,200,000                
Amortized Cost [29],[35],[56],[57]               (26,900,000)                
Fair Value [4],[29],[35],[56],[57]               $ (39,200,000)                
Investment, Identifier [Axis]: Global Jet Capital LLC, Structured Mezzanine, Asset Based Finance, Commercial & Professional Services -3                                
Investment interest rate [16],[29],[35],[56],[57]               15.00% 15.00% 15.00% 15.00% 15.00% 15.00%      
Interest rate, paid in kind [16],[29],[35],[56],[57]               15.00% 15.00% 15.00% 15.00% 15.00% 15.00%      
Principal amount [18],[29],[35],[56],[57]               $ 4,600,000                
Amortized Cost [29],[35],[56],[57]               (3,100,000)                
Fair Value [4],[29],[35],[56],[57]               $ (4,600,000)                
Investment, Identifier [Axis]: Global Jet Capital LLC, Structured Mezzanine, Asset Based Finance, Commercial & Professional Services 1                                
Interest rate, paid in kind [7],[8],[9],[10],[11] 15.00% 15.00% 15.00% 15.00% 15.00% 15.00%                    
Principal amount [8],[9],[10],[11],[15] $ 27,000,000.0                              
Amortized Cost [8],[9],[10],[11] (20,200,000)                              
Fair Value [3],[8],[9],[10],[11] $ (27,000,000.0)                              
Investment, Identifier [Axis]: Global Jet Capital LLC, Structured Mezzanine, Asset Based Finance, Commercial & Professional Services 1 | Maximum                                
Interest rate, paid in kind [7],[8],[9],[10],[11] 15.00% 15.00% 15.00% 15.00% 15.00% 15.00%                    
Investment, Identifier [Axis]: Global Jet Capital LLC, Structured Mezzanine, Asset Based Finance, Commercial & Professional Services 2                                
Interest rate, paid in kind [7],[8],[9],[10],[11] 15.00% 15.00% 15.00% 15.00% 15.00% 15.00%                    
Principal amount [8],[9],[10],[11],[15] $ 19,800,000                              
Amortized Cost [8],[9],[10],[11] (14,400,000)                              
Fair Value [3],[8],[9],[10],[11] $ (19,800,000)                              
Investment, Identifier [Axis]: Global Jet Capital LLC, Structured Mezzanine, Asset Based Finance, Commercial & Professional Services 2 | Maximum                                
Interest rate, paid in kind [7],[8],[9],[10],[11] 15.00% 15.00% 15.00% 15.00% 15.00% 15.00%                    
Investment, Identifier [Axis]: Global Jet Capital LLC, Structured Mezzanine, Asset Based Finance, Commercial & Professional Services 3                                
Principal amount [8],[9],[10],[11],[15] $ 2,300,000                              
Amortized Cost [8],[9],[10],[11] (1,600,000)                              
Fair Value [3],[8],[9],[10],[11] $ (2,300,000)                              
Investment, Identifier [Axis]: Global Lending Services LLC, Asset Based Finance, Diversified Financials -1                                
Number of Shares | shares [29],[35]               12,222,437 12,222,437 12,222,437 12,222,437 12,222,437 12,222,437      
Amortized Cost [29],[35]               $ (14,200,000)                
Fair Value [4],[29],[35]               $ (15,500,000)                
Investment, Identifier [Axis]: Global Lending Services LLC, Asset Based Finance, Diversified Financials -2                                
Number of Shares | shares [29],[35]               22,352,639 22,352,639 22,352,639 22,352,639 22,352,639 22,352,639      
Amortized Cost [29],[35]               $ (24,200,000)                
Fair Value [4],[29],[35]               $ (28,500,000)                
Investment, Identifier [Axis]: Global Lending Services LLC, Private Equity, Asset Based Finance, Diversified Financials 1                                
Number of Shares | shares [10],[11] 8,622,196 8,622,196 8,622,196 8,622,196 8,622,196 8,622,196                    
Amortized Cost [10],[11] $ (10,000,000.0)                              
Fair Value [3],[10],[11] $ (9,200,000)                              
Investment, Identifier [Axis]: Global Lending Services LLC, Private Equity, Asset Based Finance, Diversified Financials 2                                
Number of Shares | shares [10],[11] 11,471,468 11,471,468 11,471,468 11,471,468 11,471,468 11,471,468                    
Amortized Cost [10],[11] $ (11,500,000)                              
Fair Value [3],[10],[11] $ (12,000,000.0)                              
Investment, Identifier [Axis]: Global Lending Services LLC, Private Equity, Asset Based Finance, Diversified Financials 3                                
Number of Shares | shares [10],[11],[46] 3,736,989 3,736,989 3,736,989 3,736,989 3,736,989 3,736,989                    
Amortized Cost [10],[11],[46] $ (3,700,000)                              
Fair Value [3],[10],[11],[46] $ (3,700,000)                              
Investment, Identifier [Axis]: Gracent LLC, NP-1 Common Stock, Equity/Other, Health Care Equipment & Services                                
Number of Shares | shares [33],[55] 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000                    
Amortized Cost [33],[55] $ (4,200,000)                              
Fair Value [3],[33],[55] $ 0                              
Investment, Identifier [Axis]: Greystone Equity Member Corp                                
Variable rate [16],[29],[35]               7.25% 7.25% 7.25% 7.25% 7.25% 7.25%      
Base Rate Floor [29],[35]               3.80% 3.80% 3.80% 3.80% 3.80% 3.80%      
Principal amount [18],[29],[35]               $ 194,800,000                
Amortized Cost [29],[35]               (182,700,000)                
Fair Value [4],[29],[35]               $ (192,600,000)                
Investment, Identifier [Axis]: Greystone Equity Member Corp, Senior Secured Loans - First Lien, Diversified Financials                                
Variable rate [7],[10],[11] 7.25% 7.25% 7.25% 7.25% 7.25% 7.25%                    
Base Rate Floor [7],[10],[11] 3.80% 3.80% 3.80% 3.80% 3.80% 3.80%                    
Principal amount [10],[11],[15] $ 194,800,000                              
Amortized Cost [10],[11] (184,400,000)                              
Fair Value [3],[10],[11] $ (188,900,000)                              
Investment, Identifier [Axis]: HKA, Senior Secured Loans - First Lien, Commercial & Professional Services 1                                
Variable rate [7],[10],[11] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Interest rate, paid in kind [7],[10],[11] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Base Rate Floor [7],[10],[11] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                    
Principal amount [10],[11],[15] $ 3,500,000                              
Amortized Cost [10],[11] (3,400,000)                              
Fair Value [3],[10],[11] $ (3,400,000)                              
Investment, Identifier [Axis]: HKA, Senior Secured Loans - First Lien, Commercial & Professional Services 1 | Maximum                                
Interest rate, paid in kind [7],[10],[11] 1.80% 1.80% 1.80% 1.80% 1.80% 1.80%                    
Investment, Identifier [Axis]: HKA, Senior Secured Loans - First Lien, Commercial & Professional Services 2                                
Variable rate [7],[11],[22] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Interest rate, paid in kind [7],[11],[22] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Base Rate Floor [7],[11],[22] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                    
Principal amount [11],[15],[22] $ 1,100,000                              
Amortized Cost [11],[22] (1,100,000)                              
Fair Value [3],[11],[22] $ (1,100,000)                              
Investment, Identifier [Axis]: HKA, Senior Secured Loans - First Lien, Commercial & Professional Services 2 | Maximum                                
Interest rate, paid in kind [7],[11],[22] 1.80% 1.80% 1.80% 1.80% 1.80% 1.80%                    
Investment, Identifier [Axis]: HM Dunn Co Inc, Preferred Stock, Series A                                
Number of Shares | shares [28],[34],[35],[37]               85,385 85,385 85,385 85,385 85,385 85,385      
Amortized Cost [28],[34],[35],[37]               $ (7,100,000)                
Fair Value [4],[28],[34],[35],[37]               $ (7,100,000)                
Investment, Identifier [Axis]: HM Dunn Co Inc, Preferred Stock, Series A, Equity/Other, Capital Goods                                
Number of Shares | shares [10],[33],[36],[39] 85,385 85,385 85,385 85,385 85,385 85,385                    
Amortized Cost [10],[33],[36],[39] $ (7,100,000)                              
Fair Value [3],[10],[33],[36],[39] $ (10,900,000)                              
Investment, Identifier [Axis]: HM Dunn Co Inc, Preferred Stock, Series B                                
Number of Shares | shares [28],[34],[35],[37]               15,000 15,000 15,000 15,000 15,000 15,000      
Amortized Cost [28],[34],[35],[37]               $ 0                
Fair Value [4],[28],[34],[35],[37]               $ 0                
Investment, Identifier [Axis]: HM Dunn Co Inc, Preferred Stock, Series B, Equity/Other, Capital Goods                                
Number of Shares | shares [10],[33],[36],[39] 15,000 15,000 15,000 15,000 15,000 15,000                    
Amortized Cost [10],[33],[36],[39] $ 0                              
Fair Value [3],[10],[33],[36],[39] $ 0                              
Investment, Identifier [Axis]: HM Dunn Co Inc, Senior Secured Loans - First Lien, Capital Goods 1                                
Variable rate [7],[10],[36] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[10],[36] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[36] $ 35,600,000                              
Amortized Cost [10],[36] (35,600,000)                              
Fair Value [3],[10],[36] $ (35,600,000)                              
Investment, Identifier [Axis]: HM Dunn Co Inc, Senior Secured Loans - First Lien, Capital Goods 1 | Maximum                                
Variable rate [7],[10],[36] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Investment, Identifier [Axis]: HM Dunn Co Inc, Senior Secured Loans - First Lien, Capital Goods 2                                
Variable rate [7],[22],[36] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[22],[36] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount | € [15],[22],[36]       € 2.0                        
Amortized Cost [22],[36] $ (2,000,000.0)                              
Fair Value [3],[22],[36] $ (2,000,000.0)                              
Investment, Identifier [Axis]: HM Dunn Co Inc, Senior Secured Loans—First Lien, Capital Goods -1                                
Variable rate [16],[34],[35]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [34],[35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[34],[35]               $ 33,600,000                
Amortized Cost [34],[35]               (33,600,000)                
Fair Value [4],[34],[35]               $ (33,600,000)                
Investment, Identifier [Axis]: HM Dunn Co Inc, Senior Secured Loans—First Lien, Capital Goods -2                                
Variable rate [16],[34],[35]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [34],[35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[34],[35]               $ 2,000,000.0                
Amortized Cost [34],[35]               (2,000,000.0)                
Fair Value [4],[34],[35]               $ (2,000,000.0)                
Investment, Identifier [Axis]: Harvey Industries Inc, Common Stock                                
Number of Shares | shares [35]               5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000      
Amortized Cost [35]               $ (2,200,000)                
Fair Value [4],[35]               $ (3,300,000)                
Investment, Identifier [Axis]: Harvey Industries Inc, Common Stock, Equity/Other, Capital Goods                                
Number of Shares | shares [10] 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000                    
Amortized Cost [10] $ (2,200,000)                              
Fair Value [3],[10] $ (4,500,000)                              
Investment, Identifier [Axis]: Heniff Transportation Systems LLC, Senior Secured Loans - First Lien, Transportation 1                                
Variable rate [7],[10] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 6,500,000                              
Amortized Cost [10] (6,300,000)                              
Fair Value [3],[10] $ (6,300,000)                              
Investment, Identifier [Axis]: Heniff Transportation Systems LLC, Senior Secured Loans - First Lien, Transportation 2                                
Variable rate [7],[10] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 19,200,000                              
Amortized Cost [10] (18,500,000)                              
Fair Value [3],[10] $ (18,900,000)                              
Investment, Identifier [Axis]: Heniff Transportation Systems LLC, Senior Secured Loans - First Lien, Transportation 3                                
Variable rate [7],[22] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 11,300,000                              
Amortized Cost [22] (11,300,000)                              
Fair Value [3],[22] $ (10,900,000)                              
Investment, Identifier [Axis]: Heniff Transportation Systems LLC, Senior Secured Loans - First Lien, Transportation 4                                
Variable rate [7],[10],[12],[13],[14],[23],[44] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[10],[12],[13],[14],[23],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[12],[13],[14],[15],[23],[44] $ 136,600,000                              
Amortized Cost [10],[12],[13],[14],[23],[44] (130,400,000)                              
Fair Value [3],[10],[12],[13],[14],[23],[44] $ (131,900,000)                              
Investment, Identifier [Axis]: Heniff Transportation Systems LLC, Senior Secured Loans—First Lien, Transportation, Maturing December 3 2024 -1                                
Variable rate [16],[35]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 5,900,000                
Amortized Cost [35]               (5,600,000)                
Fair Value [4],[35]               $ (5,600,000)                
Investment, Identifier [Axis]: Heniff Transportation Systems LLC, Senior Secured Loans—First Lien, Transportation, Maturing December 3 2024 -2                                
Variable rate [16],[17]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 11,900,000                
Amortized Cost [17]               (11,900,000)                
Fair Value [4],[17]               $ (11,100,000)                
Investment, Identifier [Axis]: Heniff Transportation Systems LLC, Senior Secured Loans—First Lien, Transportation, Maturing December 3 2026 -1                                
Variable rate [16],[19],[20],[21],[35],[43],[47]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [19],[20],[21],[35],[43],[47]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[19],[20],[21],[35],[43],[47]               $ 137,700,000                
Amortized Cost [19],[20],[21],[35],[43],[47]               (130,500,000)                
Fair Value [4],[19],[20],[21],[35],[43],[47]               $ (128,700,000)                
Investment, Identifier [Axis]: Heniff Transportation Systems LLC, Senior Secured Loans—First Lien, Transportation, Maturing December 3 2026 -2                                
Variable rate [16],[35]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 19,400,000                
Amortized Cost [35]               (18,600,000)                
Fair Value [4],[35]               $ (18,500,000)                
Investment, Identifier [Axis]: Hibu Inc, Senior Secured Loans - First Lien, Commercial & Professional Services                                
Variable rate [7],[10],[13],[14],[23],[24],[44] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10],[13],[14],[23],[24],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[13],[14],[15],[23],[24],[44] $ 99,600,000                              
Amortized Cost [10],[13],[14],[23],[24],[44] (95,300,000)                              
Fair Value [3],[10],[13],[14],[23],[24],[44] $ (100,900,000)                              
Investment, Identifier [Axis]: Higginbotham Insurance Agency Inc, Insurance -1                                
Variable rate [16],[35]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[35]               $ 25,300,000                
Amortized Cost [35]               (24,600,000)                
Fair Value [4],[35]               $ (25,800,000)                
Investment, Identifier [Axis]: Higginbotham Insurance Agency Inc, Insurance -2                                
Variable rate [16],[35]               5.25% 5.25% 5.25% 5.25% 5.25% 5.25%      
Base Rate Floor [35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[35]               $ 4,500,000                
Amortized Cost [35]               (4,300,000)                
Fair Value [4],[35]               $ (4,600,000)                
Investment, Identifier [Axis]: Higginbotham Insurance Agency Inc, Insurance -3                                
Variable rate [16],[17]               5.25% 5.25% 5.25% 5.25% 5.25% 5.25%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 32,600,000                
Amortized Cost [17]               (32,600,000)                
Fair Value [4],[17]               $ (33,300,000)                
Investment, Identifier [Axis]: Higginbotham Insurance Agency Inc, Senior Secured Loans - First Lien, Insurance 1                                
Variable rate [7],[10] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 1,400,000                              
Amortized Cost [10] (1,400,000)                              
Fair Value [3],[10] $ (1,400,000)                              
Investment, Identifier [Axis]: Higginbotham Insurance Agency Inc, Senior Secured Loans - First Lien, Insurance 2                                
Variable rate [7],[10] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 7,000,000.0                              
Amortized Cost [10] (6,600,000)                              
Fair Value [3],[10] $ (7,000,000.0)                              
Investment, Identifier [Axis]: Higginbotham Insurance Agency Inc, Senior Secured Loans - First Lien, Insurance 3                                
Variable rate [7],[22] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 8,900,000                              
Amortized Cost [22] (8,900,000)                              
Fair Value [3],[22] $ (9,000,000.0)                              
Investment, Identifier [Axis]: Hilding Anders                                
Interest rate, paid in kind [16],[25],[28],[29],[34],[35]               13.00% 13.00% 13.00% 13.00% 13.00% 13.00%      
Investment, Identifier [Axis]: Hilding Anders | Maximum                                
Interest rate, paid in kind [16],[25],[28],[29],[34],[35]               13.00% 13.00% 13.00% 13.00% 13.00% 13.00%      
Investment, Identifier [Axis]: Hilding Anders, Class A Common Stock                                
Number of Shares | shares [28],[29],[34],[35]               4,503,411 4,503,411 4,503,411 4,503,411 4,503,411 4,503,411      
Amortized Cost [28],[29],[34],[35]               $ (100,000)                
Fair Value [4],[28],[29],[34],[35]               $ 0                
Investment, Identifier [Axis]: Hilding Anders, Class A Common Stock, Equity/Other, Consumer Durables & Apparel                                
Number of Shares | shares [10],[11],[33],[36] 4,503,411 4,503,411 4,503,411 4,503,411 4,503,411 4,503,411                    
Amortized Cost [10],[11],[33],[36] $ (100,000)                              
Fair Value [3],[10],[11],[33],[36] $ 0                              
Investment, Identifier [Axis]: Hilding Anders, Class B Common Stock                                
Number of Shares | shares [28],[29],[34],[35]               574,791 574,791 574,791 574,791 574,791 574,791      
Amortized Cost [28],[29],[34],[35]               $ (0.0)                
Fair Value [4],[28],[29],[34],[35]               $ 0                
Investment, Identifier [Axis]: Hilding Anders, Class B Common Stock, Equity/Other, Consumer Durables & Apparel                                
Number of Shares | shares [10],[11],[33],[36] 574,791 574,791 574,791 574,791 574,791 574,791                    
Amortized Cost [10],[11],[33],[36] $ (0.0)                              
Fair Value [3],[10],[11],[33],[36] $ 0                              
Investment, Identifier [Axis]: Hilding Anders, Class C Common Stock                                
Number of Shares | shares [28],[29],[34],[35]               213,201 213,201 213,201 213,201 213,201 213,201      
Amortized Cost [28],[29],[34],[35]               $ 0                
Fair Value [4],[28],[29],[34],[35]               $ 0                
Investment, Identifier [Axis]: Hilding Anders, Class C Common Stock, Equity/Other, Consumer Durables & Apparel                                
Number of Shares | shares [10],[11],[33],[36] 213,201 213,201 213,201 213,201 213,201 213,201                    
Amortized Cost [10],[11],[33],[36] $ 0                              
Fair Value [3],[10],[11],[33],[36] $ 0                              
Investment, Identifier [Axis]: Hilding Anders, Equity Options                                
Number of Shares | shares [28],[29],[34],[35]               236,160,807 236,160,807 236,160,807 236,160,807 236,160,807 236,160,807      
Amortized Cost [28],[29],[34],[35]               $ (15,000,000.0)                
Fair Value [4],[28],[29],[34],[35]               0                
Investment, Identifier [Axis]: Hilding Anders, Equity Options, Equity/Other, Consumer Durables & Apparel                                
Number of Shares | shares [10],[11],[33],[36] 236,160,807 236,160,807 236,160,807 236,160,807 236,160,807 236,160,807                    
Amortized Cost [10],[11],[33],[36] $ (15,000,000.0)                              
Fair Value [3],[10],[11],[33],[36] 0                              
Investment, Identifier [Axis]: Hilding Anders, Subordinated Debt, Consumer Durables & Apparel - 3                                
Principal amount [18],[25],[28],[29],[34],[35]               134,400,000                
Amortized Cost [25],[28],[29],[34],[35]               (99,400,000)                
Fair Value [4],[25],[28],[29],[34],[35]               (46,600,000)                
Investment, Identifier [Axis]: Hilding Anders, Subordinated Debt, Consumer Durables & Apparel -1                                
Principal amount | € [18],[28],[29],[34],[35]                     € 24.8          
Amortized Cost [28],[29],[34],[35]               (26,900,000)                
Fair Value [4],[28],[29],[34],[35]               0                
Investment, Identifier [Axis]: Hilding Anders, Subordinated Debt, Consumer Durables & Apparel -2                                
Principal amount [18],[28],[29],[34],[35]               110,500,000                
Amortized Cost [28],[29],[34],[35]               0                
Fair Value [4],[28],[29],[34],[35]               $ 0                
Investment, Identifier [Axis]: Hilding Anders, Subordinated Debt, Consumer Durables & Apparel 1                                
Principal amount | € [10],[11],[15],[33],[36]       € 135.2                        
Amortized Cost [10],[11],[33],[36] (26,900,000)                              
Fair Value [3],[10],[11],[33],[36] $ 0                              
Investment, Identifier [Axis]: Hilding Anders, Subordinated Debt, Consumer Durables & Apparel 2                                
Interest rate, paid in kind [7],[10],[11],[30],[33],[36] 13.00% 13.00% 13.00% 13.00% 13.00% 13.00%                    
Principal amount [10],[11],[15],[30],[33],[36] $ 143,200,000                              
Amortized Cost [10],[11],[30],[33],[36] (99,400,000)                              
Fair Value [3],[10],[11],[30],[33],[36] $ 0                              
Investment, Identifier [Axis]: Hilding Anders, Subordinated Debt, Consumer Durables & Apparel 2 | Maximum                                
Interest rate, paid in kind [7],[10],[11],[30],[33],[36] 13.00% 13.00% 13.00% 13.00% 13.00% 13.00%                    
Investment, Identifier [Axis]: Home Partners JV 2, , Asset Based Finance, Real Estate -1                                
Number of Shares | shares [28],[29],[35],[45]               1,585,353 1,585,353 1,585,353 1,585,353 1,585,353 1,585,353      
Amortized Cost [28],[29],[35],[45]               $ (1,500,000)                
Fair Value [4],[28],[29],[35],[45]               $ (1,600,000)                
Investment, Identifier [Axis]: Home Partners JV 2, , Asset Based Finance, Real Estate -2                                
Number of Shares | shares [28],[29],[35],[45]               59,815 59,815 59,815 59,815 59,815 59,815      
Amortized Cost [28],[29],[35],[45]               $ (100,000)                
Fair Value [4],[28],[29],[35],[45]               $ (100,000)                
Investment, Identifier [Axis]: Home Partners JV 2, Private Equity, Asset Based Finance, Real Estate 1                                
Number of Shares | shares [10],[11],[46] 4,471,509 4,471,509 4,471,509 4,471,509 4,471,509 4,471,509                    
Amortized Cost [10],[11],[46] $ (4,400,000)                              
Fair Value [3],[10],[11],[46] $ (5,200,000)                              
Investment, Identifier [Axis]: Home Partners JV 2, Private Equity, Asset Based Finance, Real Estate 2                                
Number of Shares | shares [10],[11],[46] 168,710 168,710 168,710 168,710 168,710 168,710                    
Amortized Cost [10],[11],[46] $ (200,000)                              
Fair Value [3],[10],[11],[46] $ (200,000)                              
Investment, Identifier [Axis]: Home Partners JV 2, Structured Mezzanine, Asset Based Finance, Real Estate                                
Interest rate, paid in kind [7],[10],[11],[46] 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%                    
Principal amount [10],[11],[15],[46] $ 10,000,000.0                              
Amortized Cost [10],[11],[46] (10,000,000.0)                              
Fair Value [3],[10],[11],[46] $ (10,000,000.0)                              
Investment, Identifier [Axis]: Home Partners JV 2, Structured Mezzanine, Asset Based Finance, Real Estate | Maximum                                
Interest rate, paid in kind [7],[10],[11],[46] 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%                    
Investment, Identifier [Axis]: Home Partners JV 2, Structured Mezzanine, Asset Based Finance, Real Estate -1                                
Investment interest rate [16],[29],[35],[45]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00%      
Interest rate, paid in kind [16],[29],[35],[45]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00%      
Principal amount [18],[29],[35],[45]               $ 3,500,000                
Amortized Cost [29],[35],[45]               (3,400,000)                
Fair Value [4],[29],[35],[45]               $ (3,500,000)                
Investment, Identifier [Axis]: Home Partners JV 2, Structured Mezzanine, Asset Based Finance, Real Estate -2                                
Investment interest rate [16],[17],[29],[45]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00%      
Interest rate, paid in kind [16],[17],[29],[45]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00%      
Principal amount [17],[18],[29],[45]               $ 13,600,000                
Amortized Cost [17],[29],[45]               (13,600,000)                
Fair Value [4],[17],[29],[45]               $ (13,600,000)                
Investment, Identifier [Axis]: Home Partners JV, Common Stock                                
Number of Shares | shares [28],[29],[35],[45]               32,659,547 32,659,547 32,659,547 32,659,547 32,659,547 32,659,547      
Amortized Cost [28],[29],[35],[45]               $ (47,600,000)                
Fair Value [4],[28],[29],[35],[45]               $ (80,600,000)                
Investment, Identifier [Axis]: Home Partners JV, Private Equity                                
Number of Shares | shares [28],[29],[35],[45]               4,127,355 4,127,355 4,127,355 4,127,355 4,127,355 4,127,355      
Amortized Cost [28],[29],[35],[45]               $ (5,400,000)                
Fair Value [4],[28],[29],[35],[45]               $ (9,400,000)                
Investment, Identifier [Axis]: Home Partners JV, Structured Mezzanine                                
Investment interest rate [16],[29],[35],[45]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00%      
Interest rate, paid in kind [16],[29],[35],[45]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00%      
Principal amount [18],[29],[35],[45]               $ 90,400,000                
Amortized Cost [29],[35],[45]               (85,600,000)                
Fair Value [4],[29],[35],[45]               $ (90,400,000)                
Investment, Identifier [Axis]: Hudson Technologies Co                                
Variable rate [16],[29],[35]               10.25% 10.25% 10.25% 10.25% 10.25% 10.25%      
Base Rate Floor [29],[35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[29],[35]               $ 79,900,000                
Amortized Cost [29],[35]               (72,300,000)                
Fair Value [4],[29],[35]               $ (82,100,000)                
Investment, Identifier [Axis]: Imagine Communications Corp, Common Stock                                
Number of Shares | shares [28],[35]               33,034 33,034 33,034 33,034 33,034 33,034      
Amortized Cost [28],[35]               $ (3,800,000)                
Fair Value [4],[28],[35]               $ (2,500,000)                
Investment, Identifier [Axis]: Imagine Communications Corp, Common Stock, Equity/Other, Media & Entertainment                                
Number of Shares | shares [10],[33] 33,034 33,034 33,034 33,034 33,034 33,034                    
Amortized Cost [10],[33] $ (3,800,000)                              
Fair Value [3],[10],[33] $ (2,500,000)                              
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans - First Lien, Capital Goods 1                                
Variable rate [7],[39],[44] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[39],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[39],[44] $ 69,600,000                              
Amortized Cost [39],[44] (66,000,000.0)                              
Fair Value [3],[39],[44] $ (69,400,000)                              
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans - First Lien, Capital Goods 2                                
Variable rate [7],[10] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 5,300,000                              
Amortized Cost [10] (5,200,000)                              
Fair Value [3],[10] $ (5,200,000)                              
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans - First Lien, Capital Goods 3                                
Variable rate [7],[10],[44] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[44] $ 16,800,000                              
Amortized Cost [10],[44] (16,800,000)                              
Fair Value [3],[10],[44] $ (16,700,000)                              
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans - First Lien, Capital Goods 4                                
Variable rate [7],[10] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 4,000,000.0                              
Amortized Cost [10] (4,000,000.0)                              
Fair Value [3],[10] $ (4,000,000.0)                              
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans - First Lien, Capital Goods 5                                
Variable rate [7],[10] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 8,000,000.0                              
Amortized Cost [10] (8,000,000.0)                              
Fair Value [3],[10] $ (8,000,000.0)                              
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans - First Lien, Capital Goods 6                                
Variable rate [7],[22] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 4,800,000                              
Amortized Cost [22] (4,700,000)                              
Fair Value [3],[22] $ (4,700,000)                              
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans - First Lien, Capital Goods 7                                
Variable rate [7],[22] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 1,800,000                              
Amortized Cost [22] (1,800,000)                              
Fair Value [3],[22] $ (1,800,000)                              
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans—First Lien, Capital Goods , Maturing November 22, 2024 -1                                
Variable rate [16],[35]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 200,000                
Amortized Cost [35]               (200,000)                
Fair Value [4],[35]               $ (200,000)                
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans—First Lien, Capital Goods , Maturing November 22, 2024 -2                                
Variable rate [16],[17]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 4,500,000                
Amortized Cost [17]               (4,500,000)                
Fair Value [4],[17]               $ (4,500,000)                
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans—First Lien, Capital Goods , Maturing November 22, 2025 - 2                                
Variable rate [16],[17]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [17]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Principal amount [17],[18]               $ 5,600,000                
Amortized Cost [17]               (5,600,000)                
Fair Value [4],[17]               $ (5,700,000)                
Investment, Identifier [Axis]: Individual FoodService, Senior Secured Loans—First Lien, Capital Goods , Maturing November 22, 2025 -1                                
Variable rate [16],[35],[37],[43]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [35],[37],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[37],[43]               $ 90,800,000                
Amortized Cost [35],[37],[43]               (86,500,000)                
Fair Value [4],[35],[37],[43]               $ (91,700,000)                
Investment, Identifier [Axis]: Industria Chimica Emiliana Srl                                
Variable rate [16],[29],[35]               7.25% 7.25% 7.25% 7.25% 7.25% 7.25%      
Base Rate Floor [29],[35]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Principal amount | € [18],[29],[35]                     € 88.8          
Amortized Cost [29],[35]               $ (101,300,000)                
Fair Value [4],[29],[35]               $ (103,900,000)                
Investment, Identifier [Axis]: Industria Chimica Emiliana Srl, Senior Secured Loans - First Lien, Pharmaceuticals, Biotechnology & Life Sciences                                
Variable rate [7],[10],[11] 7.25% 7.25% 7.25% 7.25% 7.25% 7.25%                    
Base Rate Floor [7],[10],[11] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount [10],[11],[15] $ 88,800,000                              
Amortized Cost [10],[11] (101,900,000)                              
Fair Value [3],[10],[11] $ (85,600,000)                              
Investment, Identifier [Axis]: Industry City TI Lessor LP                                
Variable rate [16],[35],[37]               10.80% 10.80% 10.80% 10.80% 10.80% 10.80%      
Interest rate, paid in kind [16],[35],[37]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[37]               $ 29,900,000                
Amortized Cost [35],[37]               (30,000,000.0)                
Fair Value [4],[35],[37]               $ (32,500,000)                
Investment, Identifier [Axis]: Industry City TI Lessor LP | Maximum                                
Interest rate, paid in kind [16],[35],[37]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Investment, Identifier [Axis]: Industry City TI Lessor LP, Senior Secured Loans - First Lien, Consumer Services                                
Investment interest rate [7],[10],[39] 10.80% 10.80% 10.80% 10.80% 10.80% 10.80%                    
Interest rate, paid in kind [7],[10],[39] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[39] $ 26,700,000                              
Amortized Cost [10],[39] (26,800,000)                              
Fair Value [3],[10],[39] $ (27,500,000)                              
Investment, Identifier [Axis]: Industry City TI Lessor LP, Senior Secured Loans - First Lien, Consumer Services | Maximum                                
Interest rate, paid in kind [7],[10],[39] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Investment, Identifier [Axis]: Insight Global LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 1                                
Variable rate [7],[10],[12] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[10],[12] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[12],[15] $ 203,800,000                              
Amortized Cost [10],[12] (202,000,000.0)                              
Fair Value [3],[10],[12] $ (200,700,000)                              
Investment, Identifier [Axis]: Insight Global LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 2                                
Variable rate [7],[22] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 21,100,000                              
Amortized Cost [22] (21,100,000)                              
Fair Value [3],[22] $ (20,700,000)                              
Investment, Identifier [Axis]: Insight Global LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 3                                
Variable rate [7],[22] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 26,800,000                              
Amortized Cost [22] (26,800,000)                              
Fair Value [3],[22] $ (26,400,000)                              
Investment, Identifier [Axis]: Insight Global LLC, Senior Secured Loans—First Lien, Commercial & Professional Services, Maturing September 22, 2027 -1                                
Variable rate [16],[35]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[35]               $ 10,500,000                
Amortized Cost [35]               (10,500,000)                
Fair Value [4],[35]               $ (10,400,000)                
Investment, Identifier [Axis]: Insight Global LLC, Senior Secured Loans—First Lien, Commercial & Professional Services, Maturing September 22, 2027 -2                                
Variable rate [16],[17]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 10,500,000                
Amortized Cost [17]               (10,500,000)                
Fair Value [4],[17]               $ (10,400,000)                
Investment, Identifier [Axis]: Insight Global LLC, Senior Secured Loans—First Lien, Commercial & Professional Services, Maturing September 22, 2028                                
Variable rate [16],[21],[35]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [21],[35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[21],[35]               $ 230,000,000.0                
Amortized Cost [21],[35]               (227,800,000)                
Fair Value [4],[21],[35]               $ (227,200,000)                
Investment, Identifier [Axis]: Insight Global LLC, Senior Secured Loans—First Lien, Commercial & Professional Services, Maturing November 15, 2028                                
Variable rate [16],[17]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 20,000,000.0                
Amortized Cost [17]               (20,000,000.0)                
Fair Value [4],[17]               $ (19,800,000)                
Investment, Identifier [Axis]: Integrity Marketing Group LLC                                
Variable rate [16],[17]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 145,300,000                
Amortized Cost [17]               (145,300,000)                
Fair Value [4],[17]               $ (143,200,000)                
Investment, Identifier [Axis]: Integrity Marketing Group LLC, Senior Secured Loans - First Lien, Insurance                                
Variable rate [7],[10] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 124,700,000                              
Amortized Cost [10] (124,700,000)                              
Fair Value [3],[10] $ (122,400,000)                              
Investment, Identifier [Axis]: J S Held LLC, Senior Secured Loans - First Lien, Insurance 1                                
Variable rate [7],[10],[12],[23],[39],[44] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[10],[12],[23],[39],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[12],[15],[23],[39],[44] $ 125,500,000                              
Amortized Cost [10],[12],[23],[39],[44] (123,300,000)                              
Fair Value [3],[10],[12],[23],[39],[44] $ (125,000,000.0)                              
Investment, Identifier [Axis]: J S Held LLC, Senior Secured Loans - First Lien, Insurance 2                                
Variable rate [7],[10] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 1,700,000                              
Amortized Cost [10] (1,500,000)                              
Fair Value [3],[10] $ (1,700,000)                              
Investment, Identifier [Axis]: J S Held LLC, Senior Secured Loans - First Lien, Insurance 3                                
Variable rate [7],[10],[23] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[10],[23] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[23] $ 23,200,000                              
Amortized Cost [10],[23] (23,200,000)                              
Fair Value [3],[10],[23] $ (23,100,000)                              
Investment, Identifier [Axis]: J S Held LLC, Senior Secured Loans - First Lien, Insurance 4                                
Variable rate [7],[22] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 12,400,000                              
Amortized Cost [22] (12,400,000)                              
Fair Value [3],[22] $ (12,400,000)                              
Investment, Identifier [Axis]: J S Held LLC, Senior Secured Loans - First Lien, Insurance 5                                
Variable rate [7],[22] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 21,000,000.0                              
Amortized Cost [22] (21,000,000.0)                              
Fair Value [3],[22] $ (20,900,000)                              
Investment, Identifier [Axis]: J S Held LLC,, Senior Secured Loans—First Lien, Insurance -1                                
Variable rate [16],[21],[35],[37],[43],[47]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [21],[35],[37],[43],[47]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[21],[35],[37],[43],[47]               $ 165,400,000                
Amortized Cost [21],[35],[37],[43],[47]               (159,800,000)                
Fair Value [4],[21],[35],[37],[43],[47]               $ (167,100,000)                
Investment, Identifier [Axis]: J S Held LLC,, Senior Secured Loans—First Lien, Insurance -2                                
Variable rate [16],[35]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 2,800,000                
Amortized Cost [35]               (2,600,000)                
Fair Value [4],[35]               $ (2,800,000)                
Investment, Identifier [Axis]: J S Held LLC,, Senior Secured Loans—First Lien, Insurance -3                                
Variable rate [16],[17]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 16,700,000                
Amortized Cost [17]               (16,700,000)                
Fair Value [4],[17]               $ (16,900,000)                
Investment, Identifier [Axis]: J S Held LLC,, Senior Secured Loans—First Lien, Insurance -4                                
Variable rate [16],[17]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 11,300,000                
Amortized Cost [17]               (11,300,000)                
Fair Value [4],[17]               $ (11,300,000)                
Investment, Identifier [Axis]: JW Aluminum Co                                
Investment interest rate [16],[34],[35],[37],[40]               10.30% 10.30% 10.30% 10.30% 10.30% 10.30%      
Principal amount [18],[34],[35],[37],[40]               $ 76,500,000                
Amortized Cost [34],[35],[37],[40]               (75,500,000)                
Fair Value [4],[34],[35],[37],[40]               $ (81,000,000.0)                
Investment, Identifier [Axis]: JW Aluminum Co, Common Stock                                
Number of Shares | shares [28],[34],[35],[56],[57]               2,105 2,105 2,105 2,105 2,105 2,105      
Amortized Cost [28],[34],[35],[56],[57]               $ (0.0)                
Fair Value [4],[28],[34],[35],[56],[57]               $ 0                
Investment, Identifier [Axis]: JW Aluminum Co, Common Stock, Equity/Other, Materials                                
Number of Shares | shares [8],[9],[10],[33],[36] 2,105 2,105 2,105 2,105 2,105 2,105                    
Amortized Cost [8],[9],[10],[33],[36] $ (0.0)                              
Fair Value [3],[8],[9],[10],[33],[36] $ (2,200,000)                              
Investment, Identifier [Axis]: JW Aluminum Co, Other Senior Debt, Materials                                
Variable rate [7],[10],[36],[39],[41] 10.30% 10.30% 10.30% 10.30% 10.30% 10.30%                    
Principal amount [10],[15],[36],[39],[41] $ 76,500,000                              
Amortized Cost [10],[36],[39],[41] (75,600,000)                              
Fair Value [3],[10],[36],[39],[41] $ (78,500,000)                              
Investment, Identifier [Axis]: JW Aluminum Co, Preferred Stock                                
Interest rate, paid in kind [16],[34],[35],[56],[57]               12.50% 12.50% 12.50% 12.50% 12.50% 12.50%      
Number of Shares | shares [34],[35],[56],[57]               15,279 15,279 15,279 15,279 15,279 15,279      
Amortized Cost [34],[35],[56],[57]               $ (177,900,000)                
Fair Value [4],[34],[35],[56],[57]               $ (122,600,000)                
Investment, Identifier [Axis]: JW Aluminum Co, Preferred Stock | Maximum                                
Interest rate, paid in kind [16],[34],[35],[56],[57]               12.50% 12.50% 12.50% 12.50% 12.50% 12.50%      
Investment, Identifier [Axis]: JW Aluminum Co, Preferred Stock, Equity/Other, Materials                                
Interest rate, paid in kind [7],[8],[9],[10],[36] 6.30% 6.30% 6.30% 6.30% 6.30% 6.30%                    
Number of Shares | shares [8],[9],[10],[36] 15,279 15,279 15,279 15,279 15,279 15,279                    
Amortized Cost [8],[9],[10],[36] $ (195,600,000)                              
Fair Value [3],[8],[9],[10],[36] $ (105,400,000)                              
Investment, Identifier [Axis]: JW Aluminum Co, Preferred Stock, Equity/Other, Materials | Maximum                                
Interest rate, paid in kind [7],[8],[9],[10],[36] 12.50% 12.50% 12.50% 12.50% 12.50% 12.50%                    
Investment, Identifier [Axis]: Jarrow Formulas Inc                                
Variable rate [16],[19],[20],[21],[35],[37],[42],[43],[47]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [19],[20],[21],[35],[37],[42],[43],[47]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[19],[20],[21],[35],[37],[42],[43],[47]               $ 186,600,000                
Amortized Cost [19],[20],[21],[35],[37],[42],[43],[47]               (177,100,000)                
Fair Value [4],[19],[20],[21],[35],[37],[42],[43],[47]               $ (190,300,000)                
Investment, Identifier [Axis]: Jarrow Formulas Inc, Senior Secured Loans - First Lien, Household & Personal Products                                
Variable rate [7],[10],[12],[13],[14],[23],[24],[39],[44] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10],[12],[13],[14],[23],[24],[39],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[12],[13],[14],[15],[23],[24],[39],[44] $ 183,000,000.0                              
Amortized Cost [10],[12],[13],[14],[23],[24],[39],[44] (174,900,000)                              
Fair Value [3],[10],[12],[13],[14],[23],[24],[39],[44] $ (184,900,000)                              
Investment, Identifier [Axis]: Jet Edge International LLC, Preferred Stock                                
Investment interest rate [16],[45],[52]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00%      
Interest rate, paid in kind [16],[45],[52]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Number of Shares | shares [45],[52]               20,878,236 20,878,236 20,878,236 20,878,236 20,878,236 20,878,236      
Amortized Cost [45],[52]               $ (20,900,000)                
Fair Value [4],[45],[52]               $ (16,800,000)                
Investment, Identifier [Axis]: Jet Edge International LLC, Preferred Stock | Maximum                                
Interest rate, paid in kind [16],[45],[52]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00%      
Investment, Identifier [Axis]: Jet Edge International LLC, Term Loan, Asset Based Finance, Transportation -1                                
Investment interest rate [16],[35],[45]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00%      
Interest rate, paid in kind [16],[35],[45]               2.00% 2.00% 2.00% 2.00% 2.00% 2.00%      
Principal amount [18],[35],[45]               $ 76,600,000                
Amortized Cost [35],[45]               (75,900,000)                
Fair Value [4],[35],[45]               $ (76,100,000)                
Investment, Identifier [Axis]: Jet Edge International LLC, Term Loan, Asset Based Finance, Transportation -1 | Maximum                                
Interest rate, paid in kind [16],[35],[45]               2.00% 2.00% 2.00% 2.00% 2.00% 2.00%      
Investment, Identifier [Axis]: Jet Edge International LLC, Term Loan, Asset Based Finance, Transportation -2                                
Investment interest rate [16],[17],[45]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00%      
Interest rate, paid in kind [16],[17],[45]               2.00% 2.00% 2.00% 2.00% 2.00% 2.00%      
Principal amount [17],[18],[45]               $ 75,000,000.0                
Amortized Cost [17],[45]               (75,000,000.0)                
Fair Value [4],[17],[45]               $ (74,500,000)                
Investment, Identifier [Axis]: Jet Edge International LLC, Term Loan, Asset Based Finance, Transportation -2 | Maximum                                
Interest rate, paid in kind [16],[17],[45]               2.00% 2.00% 2.00% 2.00% 2.00% 2.00%      
Investment, Identifier [Axis]: Jet Edge International LLC, Term Loan, Asset Based Finance, Transportation 1                                
Investment interest rate [7],[10] 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%                    
Interest rate, paid in kind [7],[10] 2.00% 2.00% 2.00% 2.00% 2.00% 2.00%                    
Principal amount [10],[15] $ 94,200,000                              
Amortized Cost [10] (94,200,000)                              
Fair Value [3],[10] $ (97,000,000.0)                              
Investment, Identifier [Axis]: Jet Edge International LLC, Term Loan, Asset Based Finance, Transportation 1 | Maximum                                
Interest rate, paid in kind [7],[10] 2.00% 2.00% 2.00% 2.00% 2.00% 2.00%                    
Investment, Identifier [Axis]: Jet Edge International LLC, Term Loan, Asset Based Finance, Transportation 2                                
Investment interest rate [7],[22] 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%                    
Interest rate, paid in kind [7],[22] 2.00% 2.00% 2.00% 2.00% 2.00% 2.00%                    
Principal amount [15],[22] $ 700,000                              
Amortized Cost [22] (700,000)                              
Fair Value [3],[22] $ (700,000)                              
Investment, Identifier [Axis]: Jet Edge International LLC, Term Loan, Asset Based Finance, Transportation 2 | Maximum                                
Interest rate, paid in kind [7],[22] 2.00% 2.00% 2.00% 2.00% 2.00% 2.00%                    
Investment, Identifier [Axis]: Jet Edge International LLC, Warrant                                
Number of Shares | shares [28],[45],[50]               3,963 3,963 3,963 3,963 3,963 3,963      
Amortized Cost [28],[45],[50]               $ 0                
Fair Value [4],[28],[45],[50]               $ (4,500,000)                
Investment, Identifier [Axis]: Jones Apparel Holdings, Inc., Common Stock                                
Number of Shares | shares [28],[35]               5,451 5,451 5,451 5,451 5,451 5,451      
Amortized Cost [28],[35]               $ (900,000)                
Fair Value [4],[28],[35]               $ 0                
Investment, Identifier [Axis]: Jones Apparel Holdings, Inc., Common Stock, Equity/Other, Consumer Durables & Apparel                                
Number of Shares | shares [10],[33] 5,451 5,451 5,451 5,451 5,451 5,451                    
Amortized Cost [10],[33] $ (900,000)                              
Fair Value [3],[10],[33] $ 0                              
Investment, Identifier [Axis]: KBP Investments LLC, Senior Secured Loans—First Lien, Food & Staples Retailing -1                                
Variable rate [16],[35]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00%      
Base Rate Floor [35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[35]               $ 23,600,000                
Amortized Cost [35]               (22,900,000)                
Fair Value [4],[35]               $ (23,300,000)                
Investment, Identifier [Axis]: KBP Investments LLC, Senior Secured Loans—First Lien, Food & Staples Retailing -2                                
Variable rate [16],[17]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 3,900,000                
Amortized Cost [17]               (3,900,000)                
Fair Value [4],[17]               $ (3,800,000)                
Investment, Identifier [Axis]: KKR Central Park Leasing Aggregator L.P., Partnership Interest                                
Investment interest rate [16],[25],[28],[29],[35]               14.30% 14.30% 14.30% 14.30% 14.30% 14.30%      
Principal amount [18],[25],[28],[29],[35]               $ 39,100,000                
Amortized Cost [25],[28],[29],[35]               (39,100,000)                
Fair Value [4],[25],[28],[29],[35]               $ (25,800,000)                
Investment, Identifier [Axis]: KKR Central Park Leasing Aggregator L.P., Partnership Interest, Asset Based Finance, Capital Goods                                
Variable rate [7],[10],[11],[30],[33] 14.30% 14.30% 14.30% 14.30% 14.30% 14.30%                    
Principal amount [10],[11],[15],[30],[33] $ 39,100,000                              
Amortized Cost [10],[11],[30],[33] (39,100,000)                              
Fair Value [3],[10],[11],[30],[33] $ (16,300,000)                              
Investment, Identifier [Axis]: KKR Chord IP Aggregator LP, Partnership Interest                                
Number of Shares | shares [29],[35]               114,193,861 114,193,861 114,193,861 114,193,861 114,193,861 114,193,861      
Amortized Cost [29],[35]               $ (112,600,000)                
Fair Value [4],[29],[35]               $ (131,500,000)                
Investment, Identifier [Axis]: KKR Chord IP Aggregator LP, Partnership Interest, Asset Based Finance, Insurance                                
Number of Shares | shares 62,294,586 62,294,586 62,294,586 62,294,586 62,294,586 62,294,586                    
Amortized Cost $ (62,300,000)                              
Fair Value $ (68,500,000)                              
Investment, Identifier [Axis]: KKR Chord IP Aggregator LP, Structured Mezzanine                                
Investment interest rate [16],[29],[35]               9.00% 9.00% 9.00% 9.00% 9.00% 9.00%      
Principal amount [18],[29],[35]               $ 167,300,000                
Amortized Cost [29],[35]               (164,900,000)                
Fair Value [4],[29],[35]               $ (167,300,000)                
Investment, Identifier [Axis]: KKR Rocket Loans Aggregator LLC, Partnership Interest                                
Number of Shares | shares [29],[34],[35]               1,387,913 1,387,913 1,387,913 1,387,913 1,387,913 1,387,913      
Amortized Cost [29],[34],[35]               $ (1,400,000)                
Fair Value [4],[29],[34],[35]               $ (1,400,000)                
Investment, Identifier [Axis]: KKR Rocket Loans Aggregator LLC, Partnership Interest, Asset Based Finance, Diversified Financials                                
Number of Shares | shares [10],[11],[36] 2,977,627 2,977,627 2,977,627 2,977,627 2,977,627 2,977,627                    
Amortized Cost [10],[11],[36] $ (3,000,000.0)                              
Fair Value [3],[10],[11],[36] $ (3,000,000.0)                              
Investment, Identifier [Axis]: KKR Zeno Aggregator LP (K2 Aviation), Partnership Interest                                
Number of Shares | shares [28],[29],[35]               23,664,954 23,664,954 23,664,954 23,664,954 23,664,954 23,664,954      
Amortized Cost [28],[29],[35]               $ (23,000,000.0)                
Fair Value [4],[28],[29],[35]               $ (19,100,000)                
Investment, Identifier [Axis]: KKR Zeno Aggregator LP (K2 Aviation), Partnership Interest, Asset Based Finance, Capital Goods                                
Number of Shares | shares [10],[11],[33] 23,664,954 23,664,954 23,664,954 23,664,954 23,664,954 23,664,954                    
Amortized Cost [10],[11],[33] $ (23,000,000.0)                              
Fair Value [3],[10],[11],[33] $ (19,600,000)                              
Investment, Identifier [Axis]: Kaman Space Inc, Senior Secured Loans - First Lien, Capital Goods 1                                
Variable rate [7],[10],[44] 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%                    
Base Rate Floor [7],[10],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[44] $ 52,500,000                              
Amortized Cost [10],[44] (50,100,000)                              
Fair Value [3],[10],[44] $ (52,700,000)                              
Investment, Identifier [Axis]: Kaman Space Inc, Senior Secured Loans - First Lien, Capital Goods 2                                
Variable rate [7],[10] 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 5,200,000                              
Amortized Cost [10] (5,000,000.0)                              
Fair Value [3],[10] $ (5,200,000)                              
Investment, Identifier [Axis]: Kaman Space Inc, Senior Secured Loans - First Lien, Capital Goods 3                                
Variable rate [7],[10] 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 38,100,000                              
Amortized Cost [10] (37,500,000)                              
Fair Value [3],[10] $ (38,200,000)                              
Investment, Identifier [Axis]: Kaman Space Inc, Senior Secured Loans - First Lien, Capital Goods 4                                
Variable rate [7],[22] 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 300,000                              
Amortized Cost [22] (300,000)                              
Fair Value [3],[22] $ (300,000)                              
Investment, Identifier [Axis]: Karman Space Inc, Senior Secured Loans—First Lien, Capital Goods -1                                
Variable rate [16],[35],[43]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75%      
Base Rate Floor [35],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[43]               $ 92,400,000                
Amortized Cost [35],[43]               (88,800,000)                
Fair Value [4],[35],[43]               $ (94,200,000)                
Investment, Identifier [Axis]: Karman Space Inc, Senior Secured Loans—First Lien, Capital Goods -2                                
Variable rate [16],[35]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 4,400,000                
Amortized Cost [35]               (4,200,000)                
Fair Value [4],[35]               $ (4,400,000)                
Investment, Identifier [Axis]: Karman Space Inc, Senior Secured Loans—First Lien, Capital Goods -3                                
Variable rate [16],[17]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 1,100,000                
Amortized Cost [17]               (1,100,000)                
Fair Value [4],[17]               $ (1,100,000)                
Investment, Identifier [Axis]: Kellermeyer Bergensons Services LLC, Senior Secured Loans - First Lien, Commercial & Professional Services                                
Variable rate [7],[10],[12],[13],[14],[23],[24],[39],[44] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[10],[12],[13],[14],[23],[24],[39],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[12],[13],[14],[15],[23],[24],[39],[44] $ 369,900,000                              
Amortized Cost [10],[12],[13],[14],[23],[24],[39],[44] (359,300,000)                              
Fair Value [3],[10],[12],[13],[14],[23],[24],[39],[44] $ (353,200,000)                              
Investment, Identifier [Axis]: Kellermeyer Bergensons Services LLC, Senior Secured Loans—First Lien, Commercial & Professional Services -1                                
Variable rate [16],[19],[20],[21],[35],[37],[42],[43],[47]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [19],[20],[21],[35],[37],[42],[43],[47]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[19],[20],[21],[35],[37],[42],[43],[47]               $ 341,700,000                
Amortized Cost [19],[20],[21],[35],[37],[42],[43],[47]               (329,600,000)                
Fair Value [4],[19],[20],[21],[35],[37],[42],[43],[47]               $ (342,800,000)                
Investment, Identifier [Axis]: Kellermeyer Bergensons Services LLC, Senior Secured Loans—First Lien, Commercial & Professional Services -2                                
Variable rate [16],[17]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 31,000,000.0                
Amortized Cost [17]               (31,000,000.0)                
Fair Value [4],[17]               $ (31,100,000)                
Investment, Identifier [Axis]: Kilter Finance, Preferred Stock                                
Investment interest rate [16],[29],[34],[35]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Interest rate, paid in kind [16],[29],[34],[35]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Number of Shares | shares [29],[34],[35]               36,108,611 36,108,611 36,108,611 36,108,611 36,108,611 36,108,611      
Amortized Cost [29],[34],[35]               $ (34,600,000)                
Fair Value [4],[29],[34],[35]               $ (36,100,000)                
Investment, Identifier [Axis]: Kilter Finance, Preferred Stock, Asset Based Finance, Insurance                                
Interest rate, paid in kind [7],[10],[11],[36] 12.00% 12.00% 12.00% 12.00% 12.00% 12.00%                    
Principal amount [10],[11],[15],[36] $ 75,900,000                              
Amortized Cost [10],[11],[36] (74,400,000)                              
Fair Value [3],[10],[11],[36] $ (75,900,000)                              
Investment, Identifier [Axis]: Kilter Finance, Private Equity                                
Number of Shares | shares [28],[29],[34],[35]               536,709 536,709 536,709 536,709 536,709 536,709      
Amortized Cost [28],[29],[34],[35]               $ (500,000)                
Fair Value [4],[28],[29],[34],[35]               $ (500,000)                
Investment, Identifier [Axis]: Kilter Finance, Private Equity, Asset Based Finance, Insurance                                
Number of Shares | shares [10],[11],[33],[36] 536,709 536,709 536,709 536,709 536,709 536,709                    
Amortized Cost [10],[11],[33],[36] $ (500,000)                              
Fair Value [3],[10],[11],[33],[36] $ (500,000)                              
Investment, Identifier [Axis]: Lakefield Veterinary Group, Senior Secured Loans - First Lien, Commercial & Professional Services 1                                
Variable rate [7],[10],[12],[23] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[10],[12],[23] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[12],[15],[23] $ 103,800,000                              
Amortized Cost [10],[12],[23] (103,000,000.0)                              
Fair Value [3],[10],[12],[23] $ (100,800,000)                              
Investment, Identifier [Axis]: Lakefield Veterinary Group, Senior Secured Loans - First Lien, Commercial & Professional Services 2                                
Variable rate [7],[22] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 40,000,000.0                              
Amortized Cost [22] (40,000,000.0)                              
Fair Value [3],[22] $ (38,900,000)                              
Investment, Identifier [Axis]: Lakefield Veterinary Group, Senior Secured Loans—First Lien, Consumer Services -1                                
Variable rate [16],[21],[35],[47]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [21],[35],[47]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[21],[35],[47]               $ 115,600,000                
Amortized Cost [21],[35],[47]               (114,500,000)                
Fair Value [4],[21],[35],[47]               $ (114,600,000)                
Investment, Identifier [Axis]: Lakefield Veterinary Group, Senior Secured Loans—First Lien, Consumer Services -2                                
Variable rate [16],[17]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 56,300,000                
Amortized Cost [17]               (56,300,000)                
Fair Value [4],[17]               $ (55,700,000)                
Investment, Identifier [Axis]: Lakeview Farms Inc, Senior Secured Loans - First Lien, Food, Beverage & Tobacco 1                                
Variable rate [7],[10],[14],[44] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10],[14],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[14],[15],[44] $ 76,400,000                              
Amortized Cost [10],[14],[44] (74,700,000)                              
Fair Value [3],[10],[14],[44] $ (73,200,000)                              
Investment, Identifier [Axis]: Lakeview Farms Inc, Senior Secured Loans - First Lien, Food, Beverage & Tobacco 2                                
Variable rate [7],[10] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 5,000,000.0                              
Amortized Cost [10] (5,000,000.0)                              
Fair Value [3],[10] $ (4,800,000)                              
Investment, Identifier [Axis]: Lakeview Farms Inc, Senior Secured Loans - First Lien, Food, Beverage & Tobacco 3                                
Variable rate [7],[22] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 10,800,000                              
Amortized Cost [22] (10,800,000)                              
Fair Value [3],[22] $ (10,400,000)                              
Investment, Identifier [Axis]: Lakeview Farms Inc, Senior Secured Loans - First Lien, Food, Beverage & Tobacco 4                                
Variable rate [7],[22] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 1,800,000                              
Amortized Cost [22] (1,800,000)                              
Fair Value [3],[22] $ (1,700,000)                              
Investment, Identifier [Axis]: Lakeview Farms Inc, Senior Secured Loans—First Lien, Food, Beverage & Tobacco -1                                
Variable rate [16],[20],[35],[43]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [20],[35],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[20],[35],[43]               $ 77,000,000.0                
Amortized Cost [20],[35],[43]               (75,100,000)                
Fair Value [4],[20],[35],[43]               $ (76,500,000)                
Investment, Identifier [Axis]: Lakeview Farms Inc, Senior Secured Loans—First Lien, Food, Beverage & Tobacco -2                                
Variable rate [16],[35]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 3,400,000                
Amortized Cost [35]               (3,400,000)                
Fair Value [4],[35]               $ (3,400,000)                
Investment, Identifier [Axis]: Lakeview Farms Inc, Senior Secured Loans—First Lien, Food, Beverage & Tobacco -3                                
Variable rate [16],[17]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 10,800,000                
Amortized Cost [17]               (10,800,000)                
Fair Value [4],[17]               $ (10,800,000)                
Investment, Identifier [Axis]: Lakeview Farms Inc, Senior Secured Loans—First Lien, Food, Beverage & Tobacco -4                                
Variable rate [16],[17]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 3,400,000                
Amortized Cost [17]               (3,400,000)                
Fair Value [4],[17]               $ (3,400,000)                
Investment, Identifier [Axis]: Lenovo Group Ltd, Structured Mezzanine, Asset Based Finance, Technology Hardware & Equipment -1                                
Investment interest rate [16],[29],[35]               7.80% 7.80% 7.80% 7.80% 7.80% 7.80%      
Principal amount | € [18],[29],[35]                     € 7.8          
Amortized Cost [29],[35]               $ (9,200,000)                
Fair Value [4],[29],[35]               $ (8,900,000)                
Investment, Identifier [Axis]: Lenovo Group Ltd, Structured Mezzanine, Asset Based Finance, Technology Hardware & Equipment -2                                
Investment interest rate [16],[29],[35]               7.80% 7.80% 7.80% 7.80% 7.80% 7.80%      
Principal amount [18],[29],[35]               $ 12,100,000                
Amortized Cost [29],[35]               (12,100,000)                
Fair Value [4],[29],[35]               $ (12,100,000)                
Investment, Identifier [Axis]: Lenovo Group Ltd, Structured Mezzanine, Asset Based Finance, Technology Hardware & Equipment -3                                
Investment interest rate [16],[29],[35]               11.80% 11.80% 11.80% 11.80% 11.80% 11.80%      
Principal amount | € [18],[29],[35]                     € 5.9          
Amortized Cost [29],[35]               $ (6,900,000)                
Fair Value [4],[29],[35]               $ (6,700,000)                
Investment, Identifier [Axis]: Lenovo Group Ltd, Structured Mezzanine, Asset Based Finance, Technology Hardware & Equipment -4                                
Investment interest rate [16],[29],[35]               11.80% 11.80% 11.80% 11.80% 11.80% 11.80%      
Principal amount | £ [18],[29],[35]                       £ 1.6        
Amortized Cost [29],[35]               $ (2,200,000)                
Fair Value [4],[29],[35]               $ (2,100,000)                
Investment, Identifier [Axis]: Lenovo Group Ltd, Structured Mezzanine, Asset Based Finance, Technology Hardware & Equipment -5                                
Investment interest rate [16],[29],[35]               7.80% 7.80% 7.80% 7.80% 7.80% 7.80%      
Principal amount | £ [18],[29],[35]                       £ 2.1        
Amortized Cost [29],[35]               $ (2,900,000)                
Fair Value [4],[29],[35]               $ (2,900,000)                
Investment, Identifier [Axis]: Lenovo Group Ltd, Structured Mezzanine, Asset Based Finance, Technology Hardware & Equipment -6                                
Investment interest rate [16],[29],[35]               11.80% 11.80% 11.80% 11.80% 11.80% 11.80%      
Principal amount [18],[29],[35]               $ 9,100,000                
Amortized Cost [29],[35]               (9,100,000)                
Fair Value [4],[29],[35]               $ (9,100,000)                
Investment, Identifier [Axis]: Lexitas Inc, Senior Secured Loans - First Lien, Commercial & Professional Services 1                                
Variable rate [7],[10] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 6,400,000                              
Amortized Cost [10] (6,400,000)                              
Fair Value [3],[10] $ (6,300,000)                              
Investment, Identifier [Axis]: Lexitas Inc, Senior Secured Loans - First Lien, Commercial & Professional Services 2                                
Variable rate [7],[10],[12],[13],[14],[44] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10],[12],[13],[14],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[12],[13],[14],[15],[44] $ 121,200,000                              
Amortized Cost [10],[12],[13],[14],[44] (118,200,000)                              
Fair Value [3],[10],[12],[13],[14],[44] $ (119,400,000)                              
Investment, Identifier [Axis]: Lexitas Inc, Senior Secured Loans - First Lien, Commercial & Professional Services 3                                
Variable rate [7],[22] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount | £ [15],[22]         £ 8.4                      
Amortized Cost [22] $ (8,400,000)                              
Fair Value [3],[22] $ (8,300,000)                              
Investment, Identifier [Axis]: Lexitas Inc, Senior Secured Loans - First Lien, Commercial & Professional Services 4                                
Variable rate [7],[22] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount | £ [15],[22]         £ 5.9                      
Amortized Cost [22] $ (5,900,000)                              
Fair Value [3],[22] $ (5,800,000)                              
Investment, Identifier [Axis]: Lexitas Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -1                                
Variable rate [16],[19],[20],[21],[35],[43]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [19],[20],[21],[35],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[19],[20],[21],[35],[43]               $ 106,800,000                
Amortized Cost [19],[20],[21],[35],[43]               (103,300,000)                
Fair Value [4],[19],[20],[21],[35],[43]               $ (107,800,000)                
Investment, Identifier [Axis]: Lexitas Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -2                                
Variable rate [16],[17]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 10,300,000                
Amortized Cost [17]               (10,300,000)                
Fair Value [4],[17]               $ (10,400,000)                
Investment, Identifier [Axis]: Lexitas Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -3                                
Variable rate [16],[17]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 5,400,000                
Amortized Cost [17]               (5,400,000)                
Fair Value [4],[17]               $ (5,400,000)                
Investment, Identifier [Axis]: Lionbridge Technologies Inc                                
Variable rate [16],[19],[37],[42],[47]               7.00% 7.00% 7.00% 7.00% 7.00% 7.00%      
Base Rate Floor [19],[37],[42],[47]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[19],[37],[42],[47]               $ 68,900,000                
Amortized Cost [19],[37],[42],[47]               (64,000,000.0)                
Fair Value [4],[19],[37],[42],[47]               $ (70,300,000)                
Investment, Identifier [Axis]: Lionbridge Technologies Inc, Senior Secured Loans - First Lien, Media & Entertainment                                
Variable rate [7],[10],[13],[23],[24],[39],[44] 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%                    
Base Rate Floor [7],[10],[13],[23],[24],[39],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[13],[15],[23],[24],[39],[44] $ 124,400,000                              
Amortized Cost [10],[13],[23],[24],[39],[44] (120,400,000)                              
Fair Value [3],[10],[13],[23],[24],[39],[44] $ (125,600,000)                              
Investment, Identifier [Axis]: Lipari Foods LLC                                
Variable rate [16],[35],[37],[43],[47]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [35],[37],[43],[47]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[37],[43],[47]               $ 272,000,000.0                
Amortized Cost [35],[37],[43],[47]               (261,200,000)                
Fair Value [4],[35],[37],[43],[47]               $ (272,000,000.0)                
Investment, Identifier [Axis]: Lipari Foods LLC, Senior Secured Loans - First Lien, Food & Staples Retailing 1                                
Variable rate [7],[10],[23],[39],[44] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[10],[23],[39],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[23],[39],[44] $ 228,500,000                              
Amortized Cost [10],[23],[39],[44] (221,100,000)                              
Fair Value [3],[10],[23],[39],[44] $ (228,500,000)                              
Investment, Identifier [Axis]: Lipari Foods LLC, Senior Secured Loans - First Lien, Food & Staples Retailing 2                                
Variable rate [7],[10],[23],[39] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[10],[23],[39] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[23],[39] $ 40,000,000.0                              
Amortized Cost [10],[23],[39] (38,900,000)                              
Fair Value [3],[10],[23],[39] $ (40,000,000.0)                              
Investment, Identifier [Axis]: Lloyd's Register Quality Assurance Ltd                                
Variable rate [16],[17],[29]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Interest rate, paid in kind [16],[17],[29]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Base Rate Floor [17],[29]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Principal amount | £ [17],[18],[29]                       £ 15.0        
Amortized Cost [17],[29]               $ (20,000,000.0)                
Fair Value [4],[17],[29]               $ (19,700,000)                
Investment, Identifier [Axis]: Lloyd's Register Quality Assurance Ltd | Maximum                                
Interest rate, paid in kind [16],[17],[29]               6.30% 6.30% 6.30% 6.30% 6.30% 6.30%      
Investment, Identifier [Axis]: Lrqa Ltd, Senior Secured Loans - First Lien, Consumer Services 1                                
Variable rate [7],[10],[11] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Interest rate, paid in kind [7],[10],[11] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Base Rate Floor [7],[10],[11] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount [10],[11],[15] $ 5,700,000                              
Amortized Cost [10],[11] (7,400,000)                              
Fair Value [3],[10],[11] $ (6,200,000)                              
Investment, Identifier [Axis]: Lrqa Ltd, Senior Secured Loans - First Lien, Consumer Services 1 | Maximum                                
Interest rate, paid in kind [7],[10],[11] 6.30% 6.30% 6.30% 6.30% 6.30% 6.30%                    
Investment, Identifier [Axis]: Lrqa Ltd, Senior Secured Loans - First Lien, Consumer Services 2                                
Variable rate [7],[11],[22] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Interest rate, paid in kind [7],[11],[22] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Base Rate Floor [7],[11],[22] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount [11],[15],[22] $ 9,300,000                              
Amortized Cost [11],[22] (12,600,000)                              
Fair Value [3],[11],[22] $ (12,400,000)                              
Investment, Identifier [Axis]: Lrqa Ltd, Senior Secured Loans - First Lien, Consumer Services 2 | Maximum                                
Interest rate, paid in kind [7],[11],[22] 6.30% 6.30% 6.30% 6.30% 6.30% 6.30%                    
Investment, Identifier [Axis]: Luxembourg Life Fund - Absolute Return Fund II, Structured Mezzanine, Asset Based Finance, Insurance                                
Variable rate [7],[10],[11] 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%                    
Base Rate Floor [7],[10],[11] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                    
Principal amount [10],[11],[15] $ 26,200,000                              
Amortized Cost [10],[11] (26,200,000)                              
Fair Value [3],[10],[11] $ (26,000,000.0)                              
Investment, Identifier [Axis]: MB Precision Holdings LLC, Class A - 2 Units                                
Number of Shares | shares [28],[54],[58]               8,081,288 8,081,288 8,081,288 8,081,288 8,081,288 8,081,288      
Amortized Cost [28],[54],[58]               $ (500,000)                
Fair Value [4],[28],[54],[58]               $ 0                
Investment, Identifier [Axis]: MB Precision Holdings LLC, Class A - 2 Units, Equity/Other, Capital Goods                                
Number of Shares | shares [33],[55],[59] 8,081,288 8,081,288 8,081,288 8,081,288 8,081,288 8,081,288                    
Amortized Cost [33],[55],[59] $ (500,000)                              
Fair Value [3],[33],[55],[59] $ 0                              
Investment, Identifier [Axis]: MB2 Dental Solutions LLC, Senior Secured Loans - First Lien, Health Care Equipment & Services                                
Variable rate [7],[10],[13],[14],[24],[44] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[10],[13],[14],[24],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[13],[14],[15],[24],[44] $ 273,700,000                              
Amortized Cost [10],[13],[14],[24],[44] (264,400,000)                              
Fair Value [3],[10],[13],[14],[24],[44] $ (270,200,000)                              
Investment, Identifier [Axis]: MB2 Dental Solutions LLC, Senior Secured Loans—First Lien, Health Care Equipment & Services -1                                
Variable rate [16],[19],[20],[35],[42],[43]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [19],[20],[35],[42],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[19],[20],[35],[42],[43]               $ 231,000,000.0                
Amortized Cost [19],[20],[35],[42],[43]               (220,300,000)                
Fair Value [4],[19],[20],[35],[42],[43]               $ (231,700,000)                
Investment, Identifier [Axis]: MB2 Dental Solutions LLC, Senior Secured Loans—First Lien, Health Care Equipment & Services -2                                
Variable rate [16],[17]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 56,700,000                
Amortized Cost [17]               (56,700,000)                
Fair Value [4],[17]               $ (56,900,000)                
Investment, Identifier [Axis]: Matchesfashion Ltd                                
Variable rate [16],[29],[35]               4.63% 4.63% 4.63% 4.63% 4.63% 4.63%      
Interest rate, paid in kind [16],[29],[35]               3.00% 3.00% 3.00% 3.00% 3.00% 3.00%      
Base Rate Floor [29],[35]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Principal amount [18],[29],[35]               $ 12,900,000                
Amortized Cost [29],[35]               (12,400,000)                
Fair Value [4],[29],[35]               $ (8,200,000)                
Investment, Identifier [Axis]: Matchesfashion Ltd | Maximum                                
Interest rate, paid in kind [16],[29],[35]               3.00% 3.00% 3.00% 3.00% 3.00% 3.00%      
Investment, Identifier [Axis]: Matchesfashion Ltd, Senior Secured Loans - First Lien, Consumer Durables & Apparel                                
Variable rate [7],[10],[11],[30],[33] 4.63% 4.63% 4.63% 4.63% 4.63% 4.63%                    
Interest rate, paid in kind [7],[10],[11],[30],[33] 3.00% 3.00% 3.00% 3.00% 3.00% 3.00%                    
Base Rate Floor [7],[10],[11],[30],[33] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount [10],[11],[15],[30],[33] $ 13,100,000                              
Amortized Cost [10],[11],[30],[33] (12,700,000)                              
Fair Value [3],[10],[11],[30],[33] $ (6,200,000)                              
Investment, Identifier [Axis]: Matchesfashion Ltd, Senior Secured Loans - First Lien, Consumer Durables & Apparel | Maximum                                
Interest rate, paid in kind [7],[10],[11],[30],[33] 3.00% 3.00% 3.00% 3.00% 3.00% 3.00%                    
Investment, Identifier [Axis]: Maverick Natural Resources LLC, Common Stock                                
Number of Shares | shares [28],[54],[58]               259,211 259,211 259,211 259,211 259,211 259,211      
Amortized Cost [28],[54],[58]               $ (84,500,000)                
Fair Value [4],[28],[54],[58]               $ (143,600,000)                
Investment, Identifier [Axis]: Maverick Natural Resources LLC, Common Stock, Equity/Other, Energy                                
Number of Shares | shares [33],[55],[59] 259,211 259,211 259,211 259,211 259,211 259,211                    
Amortized Cost [33],[55],[59] $ (84,500,000)                              
Fair Value [3],[33],[55],[59] $ (192,600,000)                              
Investment, Identifier [Axis]: Med-Metrix, Common Stock                                
Number of Shares | shares [28],[50]               29,403 29,403 29,403 29,403 29,403 29,403      
Amortized Cost [28],[50]               $ (1,500,000)                
Fair Value [4],[28],[50]               $ (1,600,000)                
Investment, Identifier [Axis]: Med-Metrix, Common Stock, Equity/Other, Software & Services                                
Number of Shares | shares [33],[51] 29,403 29,403 29,403 29,403 29,403 29,403                    
Amortized Cost [33],[51] $ (1,500,000)                              
Fair Value [3],[33],[51] $ (2,500,000)                              
Investment, Identifier [Axis]: Med-Metrix, Preferred Stock                                
Interest rate, paid in kind [16],[50]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00%      
Number of Shares | shares [50]               29,403 29,403 29,403 29,403 29,403 29,403      
Amortized Cost [50]               $ (1,500,000)                
Fair Value [4],[50]               $ (1,500,000)                
Investment, Identifier [Axis]: Med-Metrix, Preferred Stock | Maximum                                
Interest rate, paid in kind [16],[50]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00%      
Investment, Identifier [Axis]: Med-Metrix, Preferred Stock, Equity/Other, Software & Services                                
Interest rate, paid in kind [7],[51] 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%                    
Number of Shares | shares [51] 29,403 29,403 29,403 29,403 29,403 29,403                    
Amortized Cost [51] $ (1,500,000)                              
Fair Value [3],[51] $ (1,500,000)                              
Investment, Identifier [Axis]: Med-Metrix, Preferred Stock, Equity/Other, Software & Services | Maximum                                
Interest rate, paid in kind [7],[51] 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%                    
Investment, Identifier [Axis]: Med-Metrix, Senior Secured Loans - First Lien, Software & Services 1                                
Variable rate [7],[10] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 56,300,000                              
Amortized Cost [10] (55,800,000)                              
Fair Value [3],[10] $ (56,400,000)                              
Investment, Identifier [Axis]: Med-Metrix, Senior Secured Loans - First Lien, Software & Services 2                                
Variable rate [7],[22] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 25,000,000.0                              
Amortized Cost [22] (25,000,000.0)                              
Fair Value [3],[22] $ (25,100,000)                              
Investment, Identifier [Axis]: Med-Metrix, Senior Secured Loans - First Lien, Software & Services 3                                
Variable rate [7],[22] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 7,800,000                              
Amortized Cost [22] (7,800,000)                              
Fair Value [3],[22] $ (7,800,000)                              
Investment, Identifier [Axis]: Med-Metrix, Senior Secured Loans—First Lien, Software & Services -1                                
Variable rate [16],[35]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 62,400,000                
Amortized Cost [35]               (61,800,000)                
Fair Value [4],[35]               $ (61,900,000)                
Investment, Identifier [Axis]: Med-Metrix, Senior Secured Loans—First Lien, Software & Services -2                                
Variable rate [16],[17]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 31,300,000                
Amortized Cost [17]               (31,300,000)                
Fair Value [4],[17]               $ (31,000,000.0)                
Investment, Identifier [Axis]: Med-Metrix, Senior Secured Loans—First Lien, Software & Services -3                                
Variable rate [16],[17]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 7,800,000                
Amortized Cost [17]               (7,800,000)                
Fair Value [4],[17]               $ (7,800,000)                
Investment, Identifier [Axis]: Medallia Inc                                
Interest rate, paid in kind [16],[35]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75%      
Base Rate Floor [35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[35]               $ 147,900,000                
Amortized Cost [35]               (146,500,000)                
Fair Value [4],[35]               $ (146,500,000)                
Investment, Identifier [Axis]: Medallia Inc | Maximum                                
Interest rate, paid in kind [16],[35]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75%      
Investment, Identifier [Axis]: Medallia Inc, Senior Secured Loans - First Lien, Software & Services                                
Variable rate [7],[10] 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 205,100,000                              
Amortized Cost [10] (203,100,000)                              
Fair Value [3],[10] $ (203,100,000)                              
Investment, Identifier [Axis]: Medallia Inc, Senior Secured Loans - First Lien, Software & Services | Maximum                                
Variable rate [7],[10] 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%                    
Investment, Identifier [Axis]: Miami Beach Medical Group LLC                                
Variable rate [16],[19],[20],[35],[42],[43]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50%      
Base Rate Floor [19],[20],[35],[42],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[19],[20],[35],[42],[43]               $ 180,600,000                
Amortized Cost [19],[20],[35],[42],[43]               (171,400,000)                
Fair Value [4],[19],[20],[35],[42],[43]               $ (178,600,000)                
Investment, Identifier [Axis]: Miami Beach Medical Group LLC, Common Stock                                
Number of Shares | shares [28],[35]               5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000      
Amortized Cost [28],[35]               $ (4,800,000)                
Fair Value [4],[28],[35]               $ (3,900,000)                
Investment, Identifier [Axis]: Miami Beach Medical Group LLC, Common Stock, Equity/Other, Health Care Equipment & Services                                
Number of Shares | shares [10],[33] 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000                    
Amortized Cost [10],[33] $ (4,800,000)                              
Fair Value [3],[10],[33] $ (1,600,000)                              
Investment, Identifier [Axis]: Miami Beach Medical Group LLC, Senior Secured Loans - First Lien, Health Care Equipment & Services 1                                
Variable rate [7],[10],[13],[14],[24],[44] 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%                    
Interest rate, paid in kind [7],[10],[13],[14],[24],[44] 1.50% 1.50% 1.50% 1.50% 1.50% 1.50%                    
Base Rate Floor [7],[10],[13],[14],[24],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[13],[14],[15],[24],[44] $ 140,500,000                              
Amortized Cost [10],[13],[14],[24],[44] (134,100,000)                              
Fair Value [3],[10],[13],[14],[24],[44] $ (130,800,000)                              
Investment, Identifier [Axis]: Miami Beach Medical Group LLC, Senior Secured Loans - First Lien, Health Care Equipment & Services 1 | Maximum                                
Interest rate, paid in kind [7],[10],[13],[14],[24],[44] 1.50% 1.50% 1.50% 1.50% 1.50% 1.50%                    
Investment, Identifier [Axis]: Miami Beach Medical Group LLC, Senior Secured Loans - First Lien, Health Care Equipment & Services 2                                
Variable rate [7],[10] 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%                    
Interest rate, paid in kind [7],[10] 1.50% 1.50% 1.50% 1.50% 1.50% 1.50%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 23,300,000                              
Amortized Cost [10] (22,100,000)                              
Fair Value [3],[10] $ (21,700,000)                              
Investment, Identifier [Axis]: Miami Beach Medical Group LLC, Senior Secured Loans - First Lien, Health Care Equipment & Services 2 | Maximum                                
Interest rate, paid in kind [7],[10] 1.50% 1.50% 1.50% 1.50% 1.50% 1.50%                    
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc                                
Interest rate, paid in kind [16],[35],[45]               7.50% 7.50% 7.50% 7.50% 7.50% 7.50%      
Principal amount [18],[35],[45]               $ 51,400,000                
Amortized Cost [35],[45]               (46,000,000.0)                
Fair Value [4],[35],[45]               $ (51,000,000.0)                
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc | Maximum                                
Interest rate, paid in kind [16],[35],[45]               7.50% 7.50% 7.50% 7.50% 7.50% 7.50%      
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Common Stock                                
Number of Shares | shares [28],[35],[45]               53,073 53,073 53,073 53,073 53,073 53,073      
Amortized Cost [28],[35],[45]               $ (600,000)                
Fair Value [4],[28],[35],[45]               $ 0                
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Preferred Stock, Series A                                
Number of Shares | shares [28],[35],[45]               55 55 55 55 55 55      
Amortized Cost [28],[35],[45]               $ (600,000)                
Fair Value [4],[28],[35],[45]               $ (100,000)                
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Preferred Stock, Series B                                
Number of Shares | shares [28],[35],[45]               23 23 23 23 23 23      
Amortized Cost [28],[35],[45]               $ (200,000)                
Fair Value [4],[28],[35],[45]               $ (400,000)                
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Preferred Stock, Series B PIK                                
Number of Shares | shares [28],[35],[45]               112,780 112,780 112,780 112,780 112,780 112,780      
Amortized Cost [28],[35],[45]               $ 0                
Fair Value [4],[28],[35],[45]               $ (11,900,000)                
Investment, Identifier [Axis]: Micronics Filtration Holdings Inc, Preferred Stock, Series C PIK                                
Number of Shares | shares [28],[35],[45]               54,000 54,000 54,000 54,000 54,000 54,000      
Amortized Cost [28],[35],[45]               $ 0                
Fair Value [4],[28],[35],[45]               $ (6,200,000)                
Investment, Identifier [Axis]: Misys Ltd                                
Variable rate [16],[29],[35],[40]               7.25% 7.25% 7.25% 7.25% 7.25% 7.25%      
Base Rate Floor [29],[35],[40]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[29],[35],[40]               $ 21,800,000                
Amortized Cost [29],[35],[40]               (20,500,000)                
Fair Value [4],[29],[35],[40]               $ (21,800,000)                
Investment, Identifier [Axis]: Misys Ltd, Preferred Stock                                
Interest rate, paid in kind 10.25% 10.25% 10.25% 10.25% 10.25% 10.25%   10.25% [16],[29],[35] 10.25% [16],[29],[35] 10.25% [16],[29],[35] 10.25% [16],[29],[35] 10.25% [16],[29],[35] 10.25% [16],[29],[35]      
Number of Shares | shares [29],[35]               79,782,377 79,782,377 79,782,377 79,782,377 79,782,377 79,782,377      
Amortized Cost [29],[35]               $ (73,500,000)                
Fair Value [4],[29],[35]               $ (78,900,000)                
Investment, Identifier [Axis]: Misys Ltd, Preferred Stock | Maximum                                
Interest rate, paid in kind 10.25% 10.25% 10.25% 10.25% 10.25% 10.25%   10.25% [16],[29],[35] 10.25% [16],[29],[35] 10.25% [16],[29],[35] 10.25% [16],[29],[35] 10.25% [16],[29],[35] 10.25% [16],[29],[35]      
Investment, Identifier [Axis]: Misys Ltd, Preferred Stock, Equity/Other, Software & Services                                
Interest rate, paid in kind [7],[10],[11] 10.25% 10.25% 10.25% 10.25% 10.25% 10.25%                    
Base Rate Floor [7],[10],[11] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Number of Shares | shares [10],[11] 62,923,634 62,923,634 62,923,634 62,923,634 62,923,634 62,923,634                    
Amortized Cost [10],[11] $ (58,800,000)                              
Fair Value [3],[10],[11] $ (60,200,000)                              
Investment, Identifier [Axis]: Misys Ltd, Preferred Stock, Equity/Other, Software & Services | Maximum                                
Interest rate, paid in kind [7],[10],[11] 10.25% 10.25% 10.25% 10.25% 10.25% 10.25%                    
Investment, Identifier [Axis]: Misys Ltd, Senior Secured Loans -Second Lien, Software & Services                                
Variable rate [7],[10],[11],[41] 7.25% 7.25% 7.25% 7.25% 7.25% 7.25%                    
Base Rate Floor [7],[10],[11],[41] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[11],[15],[41] $ 16,300,000                              
Amortized Cost [10],[11],[41] (15,500,000)                              
Fair Value [3],[10],[11],[41] $ (13,400,000)                              
Investment, Identifier [Axis]: Monitronics International Inc, Senior Secured Loans - First Lien, Commercial & Professional Services 1                                
Variable rate [7],[10],[23],[41] 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%                    
Base Rate Floor [7],[10],[23],[41] 1.30% 1.30% 1.30% 1.30% 1.30% 1.30%                    
Principal amount [10],[15],[23],[41] $ 18,700,000                              
Amortized Cost [10],[23],[41] (17,500,000)                              
Fair Value [3],[10],[23],[41] $ (12,500,000)                              
Investment, Identifier [Axis]: Monitronics International Inc, Senior Secured Loans - First Lien, Commercial & Professional Services 2                                
Variable rate [7],[10] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[10] 1.50% 1.50% 1.50% 1.50% 1.50% 1.50%                    
Principal amount [10],[15] $ 58,400,000                              
Amortized Cost [10] (56,400,000)                              
Fair Value [3],[10] $ (54,600,000)                              
Investment, Identifier [Axis]: Monitronics International Inc, Senior Secured Loans - First Lien, Commercial & Professional Services 3                                
Variable rate [7],[22] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[22] 1.50% 1.50% 1.50% 1.50% 1.50% 1.50%                    
Principal amount [15],[22] $ 11,600,000                              
Amortized Cost [22] (11,600,000)                              
Fair Value [3],[22] $ (10,800,000)                              
Investment, Identifier [Axis]: Monitronics International Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -1                                
Variable rate [16],[35],[40],[47]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50%      
Base Rate Floor [35],[40],[47]               1.30% 1.30% 1.30% 1.30% 1.30% 1.30%      
Principal amount [18],[35],[40],[47]               $ 18,800,000                
Amortized Cost [35],[40],[47]               (17,200,000)                
Fair Value [4],[35],[40],[47]               $ (17,700,000)                
Investment, Identifier [Axis]: Monitronics International Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -2                                
Variable rate [16],[35]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00%      
Base Rate Floor [35]               1.50% 1.50% 1.50% 1.50% 1.50% 1.50%      
Principal amount [18],[35]               $ 47,300,000                
Amortized Cost [35]               (44,800,000)                
Fair Value [4],[35]               $ (45,100,000)                
Investment, Identifier [Axis]: Monitronics International Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -3                                
Variable rate [16],[17]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00%      
Base Rate Floor [17]               1.50% 1.50% 1.50% 1.50% 1.50% 1.50%      
Principal amount [17],[18]               $ 22,700,000                
Amortized Cost [17]               (22,700,000)                
Fair Value [4],[17]               $ (21,600,000)                
Investment, Identifier [Axis]: Motion Recruitment Partners LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 1                                
Variable rate [7],[10],[12],[23] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                    
Base Rate Floor [7],[10],[12],[23] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[12],[15],[23] $ 64,200,000                              
Amortized Cost [10],[12],[23] (64,200,000)                              
Fair Value [3],[10],[12],[23] $ (64,000,000.0)                              
Investment, Identifier [Axis]: Motion Recruitment Partners LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 2                                
Variable rate [7],[10],[24],[44] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                    
Base Rate Floor [7],[10],[24],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[24],[44] $ 54,800,000                              
Amortized Cost [10],[24],[44] (51,200,000)                              
Fair Value [3],[10],[24],[44] $ (54,700,000)                              
Investment, Identifier [Axis]: Motion Recruitment Partners LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 3                                
Variable rate [7],[10] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 4,700,000                              
Amortized Cost [10] (4,500,000)                              
Fair Value [3],[10] $ (4,700,000)                              
Investment, Identifier [Axis]: Motion Recruitment Partners LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 4                                
Variable rate [7],[22] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 59,600,000                              
Amortized Cost [22] (59,600,000)                              
Fair Value [3],[22] $ (59,500,000)                              
Investment, Identifier [Axis]: Motion Recruitment Partners LLC, Senior Secured Loans—First Lien, Commercial & Professional Services - 2                                
Variable rate [16],[21],[35],[42],[43],[47]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50%      
Base Rate Floor [21],[35],[42],[43],[47]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[21],[35],[42],[43],[47]               $ 119,900,000                
Amortized Cost [21],[35],[42],[43],[47]               (115,500,000)                
Fair Value [4],[21],[35],[42],[43],[47]               $ (118,400,000)                
Investment, Identifier [Axis]: Motion Recruitment Partners LLC, Senior Secured Loans—First Lien, Commercial & Professional Services -1                                
Variable rate [16],[35]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 4,800,000                
Amortized Cost [35]               (4,500,000)                
Fair Value [4],[35]               $ (4,700,000)                
Investment, Identifier [Axis]: Motion Recruitment Partners LLC, Senior Secured Loans—First Lien, Commercial & Professional Services -3                                
Variable rate [16],[17]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 59,600,000                
Amortized Cost [17]               (59,600,000)                
Fair Value [4],[17]               $ (58,900,000)                
Investment, Identifier [Axis]: My Community Homes PropCo 2, Private Equity, Asset Based Finance, Real Estate                                
Number of Shares | shares [10],[11],[33],[36] 85,000,000 85,000,000 85,000,000 85,000,000 85,000,000 85,000,000                    
Amortized Cost [10],[11],[33],[36] $ (85,000,000.0)                              
Fair Value [3],[10],[11],[33],[36] $ (85,000,000.0)                              
Investment, Identifier [Axis]: My Community Homes SFR PropCo 2, Private Equity                                
Number of Shares | shares [28],[29],[34],[35]               33,000,000 33,000,000 33,000,000 33,000,000 33,000,000 33,000,000      
Amortized Cost [28],[29],[34],[35]               $ (33,000,000.0)                
Fair Value [4],[28],[29],[34],[35]               $ (33,000,000.0)                
Investment, Identifier [Axis]: NBG Home                                
Variable rate [16],[35]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 67,700,000                
Amortized Cost [35]               (67,600,000)                
Fair Value [4],[35]               $ (53,300,000)                
Investment, Identifier [Axis]: NBG Home 1                                
Variable rate [16],[25],[28],[35]               12.75% 12.75% 12.75% 12.75% 12.75% 12.75%      
Base Rate Floor [25],[28],[35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[25],[28],[35]               $ 31,400,000                
Amortized Cost [25],[28],[35]               (28,200,000)                
Fair Value [4],[25],[28],[35]               $ (8,500,000)                
Investment, Identifier [Axis]: NBG Home, Common Stock                                
Number of Shares | shares [28],[35]               1,903 1,903 1,903 1,903 1,903 1,903      
Amortized Cost [28],[35]               $ (2,600,000)                
Fair Value [4],[28],[35]               $ 0                
Investment, Identifier [Axis]: NBG Home, Common Stock, Equity/Other, Consumer Durables & Apparel                                
Number of Shares | shares [10],[33] 1,903 1,903 1,903 1,903 1,903 1,903                    
Amortized Cost [10],[33] $ (2,400,000)                              
Fair Value [3],[10],[33] $ 0                              
Investment, Identifier [Axis]: NBG Home, Senior Secured Loans - First Lien, Consumer Durables & Apparel                                
Variable rate [7],[10],[30],[33] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[10],[30],[33] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[30],[33] $ 76,400,000                              
Amortized Cost [10],[30],[33] (71,900,000)                              
Fair Value [3],[10],[30],[33] $ (28,000,000.0)                              
Investment, Identifier [Axis]: NBG Home, Senior Secured Loans -Second Lien, Consumer Durables & Apparel                                
Variable rate [7],[10],[30],[33] 12.75% 12.75% 12.75% 12.75% 12.75% 12.75%                    
Base Rate Floor [7],[10],[30],[33] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[30],[33] $ 34,600,000                              
Amortized Cost [10],[30],[33] (29,400,000)                              
Fair Value [3],[10],[30],[33] $ (100,000)                              
Investment, Identifier [Axis]: NCI Inc                                
Variable rate [16],[35]               7.50% 7.50% 7.50% 7.50% 7.50% 7.50%      
Interest rate, paid in kind [16],[35]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 78,800,000                
Amortized Cost [35]               (77,700,000)                
Fair Value [4],[35]               $ (72,000,000.0)                
Investment, Identifier [Axis]: NCI Inc | Maximum                                
Interest rate, paid in kind [16],[35]               2.50% 2.50% 2.50% 2.50% 2.50% 2.50%      
Investment, Identifier [Axis]: NCI Inc, Senior Secured Loans - First Lien, Software & Services                                
Variable rate [7],[10] 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%                    
Interest rate, paid in kind [7],[10] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 77,300,000                              
Amortized Cost [10] (76,400,000)                              
Fair Value [3],[10] $ (55,200,000)                              
Investment, Identifier [Axis]: NCI Inc, Senior Secured Loans - First Lien, Software & Services | Maximum                                
Interest rate, paid in kind [7],[10] 2.50% 2.50% 2.50% 2.50% 2.50% 2.50%                    
Investment, Identifier [Axis]: NPD Group Inc/The, Senior Secured Loans - First Lien, Consumer Services 1                                
Variable rate [7],[10] 3.50% 3.50% 3.50% 3.50% 3.50% 3.50%                    
Interest rate, paid in kind [7],[10] 2.80% 2.80% 2.80% 2.80% 2.80% 2.80%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 19,000,000.0                              
Amortized Cost [10] (19,000,000.0)                              
Fair Value [3],[10] $ (19,000,000.0)                              
Investment, Identifier [Axis]: NPD Group Inc/The, Senior Secured Loans - First Lien, Consumer Services 1 | Maximum                                
Interest rate, paid in kind [7],[10] 2.80% 2.80% 2.80% 2.80% 2.80% 2.80%                    
Investment, Identifier [Axis]: NPD Group Inc/The, Senior Secured Loans - First Lien, Consumer Services 2                                
Variable rate [7],[22] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 1,000,000.0                              
Amortized Cost [22] (1,000,000.0)                              
Fair Value [3],[22] $ (1,000,000.0)                              
Investment, Identifier [Axis]: Net Documents, Senior Secured Loans - First Lien, Software & Services 1                                
Variable rate [7],[10] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 24,600,000                              
Amortized Cost [10] (24,400,000)                              
Fair Value [3],[10] $ (24,000,000.0)                              
Investment, Identifier [Axis]: Net Documents, Senior Secured Loans - First Lien, Software & Services 2                                
Variable rate [7],[10] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 2,000,000.0                              
Amortized Cost [10] (2,000,000.0)                              
Fair Value [3],[10] $ (2,000,000.0)                              
Investment, Identifier [Axis]: Net Documents, Senior Secured Loans - First Lien, Software & Services 3                                
Variable rate [7],[22] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 7,400,000                              
Amortized Cost [22] (7,300,000)                              
Fair Value [3],[22] $ (7,200,000)                              
Investment, Identifier [Axis]: Net Documents, Senior Secured Loans - First Lien, Software & Services 4                                
Variable rate [7],[22] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 900,000                              
Amortized Cost [22] (900,000)                              
Fair Value [3],[22] $ (900,000)                              
Investment, Identifier [Axis]: Net Documents, Senior Secured Loans—First Lien, Software & Services -1                                
Variable rate [16],[35]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 24,600,000                
Amortized Cost [35]               (24,400,000)                
Fair Value [4],[35]               $ (24,300,000)                
Investment, Identifier [Axis]: Net Documents, Senior Secured Loans—First Lien, Software & Services -2                                
Variable rate [16],[35]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 900,000                
Amortized Cost [35]               (900,000)                
Fair Value [4],[35]               $ (900,000)                
Investment, Identifier [Axis]: Net Documents, Senior Secured Loans—First Lien, Software & Services -3                                
Variable rate [16],[17]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 2,100,000                
Amortized Cost [17]               (2,100,000)                
Fair Value [4],[17]               $ (2,000,000.0)                
Investment, Identifier [Axis]: Net Documents, Senior Secured Loans—First Lien, Software & Services -4                                
Variable rate [16],[17]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 7,400,000                
Amortized Cost [17]               (7,300,000)                
Fair Value [4],[17]               $ (7,300,000)                
Investment, Identifier [Axis]: New Era Technology Inc, Senior Secured Loans - First Lien, Software & Services 1                                
Variable rate [7],[10],[12],[14],[24],[44] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10],[12],[14],[24],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[12],[14],[15],[24],[44] $ 51,200,000                              
Amortized Cost [10],[12],[14],[24],[44] (49,700,000)                              
Fair Value [3],[10],[12],[14],[24],[44] $ (50,300,000)                              
Investment, Identifier [Axis]: New Era Technology Inc, Senior Secured Loans - First Lien, Software & Services 2                                
Variable rate [7],[10] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 2,100,000                              
Amortized Cost [10] (2,100,000)                              
Fair Value [3],[10] $ (2,100,000)                              
Investment, Identifier [Axis]: New Era Technology Inc, Senior Secured Loans - First Lien, Software & Services 3                                
Variable rate [7],[22] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 2,600,000                              
Amortized Cost [22] (2,600,000)                              
Fair Value [3],[22] $ (2,500,000)                              
Investment, Identifier [Axis]: New Era Technology Inc, Senior Secured Loans—First Lien, Software & Services - 3                                
Variable rate [16],[17]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 13,800,000                
Amortized Cost [17]               (13,800,000)                
Fair Value [4],[17]               $ (13,700,000)                
Investment, Identifier [Axis]: New Era Technology Inc, Senior Secured Loans—First Lien, Software & Services - 4                                
Variable rate [16],[17]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 3,100,000                
Amortized Cost [17]               (3,100,000)                
Fair Value [4],[17]               $ (3,100,000)                
Investment, Identifier [Axis]: New Era Technology Inc, Senior Secured Loans—First Lien, Software & Services -1                                
Variable rate [16],[20],[21],[35],[42],[43]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [20],[21],[35],[42],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[20],[21],[35],[42],[43]               $ 82,500,000                
Amortized Cost [20],[21],[35],[42],[43]               (78,600,000)                
Fair Value [4],[20],[21],[35],[42],[43]               $ (82,100,000)                
Investment, Identifier [Axis]: New Era Technology Inc, Senior Secured Loans—First Lien, Software & Services -2                                
Variable rate [16],[35]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 1,600,000                
Amortized Cost [35]               (1,500,000)                
Fair Value [4],[35]               $ (1,600,000)                
Investment, Identifier [Axis]: NewStar Clarendon 2014-1A Class D                                
Investment interest rate [16],[29],[35]               19.50% 19.50% 19.50% 19.50% 19.50% 19.50%      
Principal amount [18],[29],[35]               $ 8,300,000                
Amortized Cost [29],[35]               (2,500,000)                
Fair Value [4],[29],[35]               $ (4,200,000)                
Investment, Identifier [Axis]: NewStar Clarendon 2014-1A Class D 1                                
Variable rate               1830.00% 1830.00% 1830.00% 1830.00% 1830.00% 1830.00%      
Investment, Identifier [Axis]: NewStar Clarendon 2014-1A Class D, Asset Based Finance, Diversified Financials                                
Variable rate [7],[10],[11] 19.70% 19.70% 19.70% 19.70% 19.70% 19.70%                    
Principal amount | € [10],[11],[15]       € 8.3                        
Amortized Cost [10],[11] $ (2,500,000)                              
Fair Value [3],[10],[11] $ (3,500,000)                              
Investment, Identifier [Axis]: Nine West Holdings Inc, Common Stock                                
Number of Shares | shares [28],[35]               5,451 5,451 5,451 5,451 5,451 5,451      
Amortized Cost [28],[35]               $ (6,500,000)                
Fair Value [4],[28],[35]               $ 0                
Investment, Identifier [Axis]: Nine West Holdings Inc, Common Stock, Equity/Other, Consumer Durables & Apparel                                
Number of Shares | shares [10],[33] 5,451 5,451 5,451 5,451 5,451 5,451                    
Amortized Cost [10],[33] $ (6,400,000)                              
Fair Value [3],[10],[33] $ 0                              
Investment, Identifier [Axis]: Novotech Pty Ltd, Senior Secured Loans - First Lien, Health Care Equipment & Services                                
Variable rate [7],[11],[22] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                    
Base Rate Floor [7],[11],[22] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                    
Principal amount [11],[15],[22] $ 5,700,000                              
Amortized Cost [11],[22] (5,600,000)                              
Fair Value [3],[11],[22] $ (5,500,000)                              
Investment, Identifier [Axis]: OEConnection LLC, Senior Secured Loans -Second Lien, Software & Services                                
Variable rate [7],[10],[23] 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%                    
Base Rate Floor [7],[10],[23] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                    
Principal amount [10],[15],[23] $ 76,100,000                              
Amortized Cost [10],[23] (75,700,000)                              
Fair Value [3],[10],[23] $ (73,800,000)                              
Investment, Identifier [Axis]: OEConnection LLC, Senior Secured Loans—Second Lien, Software & Services - 2                                
Variable rate [16],[35]               7.00% 7.00% 7.00% 7.00% 7.00% 7.00%      
Base Rate Floor [35]               0.50% 0.50% 0.50% 0.50% 0.50% 0.50%      
Principal amount [18],[35]               $ 49,000,000.0                
Amortized Cost [35]               (49,000,000.0)                
Fair Value [4],[35]               $ (48,100,000)                
Investment, Identifier [Axis]: OEConnection LLC, Senior Secured Loans—Second Lien, Software & Services -1                                
Variable rate [16],[35],[47]               8.25% 8.25% 8.25% 8.25% 8.25% 8.25%      
Base Rate Floor [35],[47]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Principal amount [18],[35],[47]               $ 27,000,000.0                
Amortized Cost [35],[47]               (26,600,000)                
Fair Value [4],[35],[47]               $ (26,500,000)                
Investment, Identifier [Axis]: Omnimax International Inc                                
Variable rate [16],[19],[20],[21],[35],[43],[47]               7.25% 7.25% 7.25% 7.25% 7.25% 7.25%      
Base Rate Floor [19],[20],[21],[35],[43],[47]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[19],[20],[21],[35],[43],[47]               $ 218,500,000                
Amortized Cost [19],[20],[21],[35],[43],[47]               (209,200,000)                
Fair Value [4],[19],[20],[21],[35],[43],[47]               $ (217,000,000.0)                
Investment, Identifier [Axis]: Omnimax International Inc, Senior Secured Loans - First Lien, Capital Goods 1                                
Variable rate [7],[10],[12],[13],[14],[23],[44] 8.50% 8.50% 8.50% 8.50% 8.50% 8.50%                    
Base Rate Floor [7],[10],[12],[13],[14],[23],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[12],[13],[14],[15],[23],[44] $ 155,600,000                              
Amortized Cost [10],[12],[13],[14],[23],[44] (149,700,000)                              
Fair Value [3],[10],[12],[13],[14],[23],[44] $ (148,600,000)                              
Investment, Identifier [Axis]: Omnimax International Inc, Senior Secured Loans - First Lien, Capital Goods 2                                
Variable rate [7],[10] 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 22,100,000                              
Amortized Cost [10] (21,100,000)                              
Fair Value [3],[10] $ (21,100,000)                              
Investment, Identifier [Axis]: Omnimax International Inc, Senior Secured Loans - First Lien, Capital Goods 3                                
Variable rate [7],[10] 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 14,600,000                              
Amortized Cost [10] (13,900,000)                              
Fair Value [3],[10] $ (14,000,000.0)                              
Investment, Identifier [Axis]: One Call Care Management Inc 1                                
Variable rate [16],[34],[35],[40]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [34],[35],[40]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[34],[35],[40]               $ 5,000,000.0                
Amortized Cost [34],[35],[40]               (4,700,000)                
Fair Value [4],[34],[35],[40]               $ (5,000,000.0)                
Investment, Identifier [Axis]: One Call Care Management Inc 2                                
Interest rate, paid in kind [16],[34],[35]               8.50% 8.50% 8.50% 8.50% 8.50% 8.50%      
Principal amount [18],[34],[35]               $ 23,500,000                
Amortized Cost [34],[35]               (21,600,000)                
Fair Value [4],[34],[35]               $ (23,500,000)                
Investment, Identifier [Axis]: One Call Care Management Inc 2 | Maximum                                
Interest rate, paid in kind [16],[34],[35]               8.50% 8.50% 8.50% 8.50% 8.50% 8.50%      
Investment, Identifier [Axis]: One Call Care Management Inc, Common Stock                                
Number of Shares | shares [28],[34],[35]               34,872 34,872 34,872 34,872 34,872 34,872      
Amortized Cost [28],[34],[35]               $ (2,100,000)                
Fair Value [4],[28],[34],[35]               $ (2,400,000)                
Investment, Identifier [Axis]: One Call Care Management Inc, Common Stock, Equity/Other, Health Care Equipment & Services                                
Number of Shares | shares [10],[33],[36] 34,872 34,872 34,872 34,872 34,872 34,872                    
Amortized Cost [10],[33],[36] $ (2,100,000)                              
Fair Value [3],[10],[33],[36] $ (2,100,000)                              
Investment, Identifier [Axis]: One Call Care Management Inc, Other Senior Debt, Health Care Equipment & Services                                
Interest rate, paid in kind [7],[10],[36] 8.50% 8.50% 8.50% 8.50% 8.50% 8.50%                    
Principal amount [10],[15],[36] $ 24,500,000                              
Amortized Cost [10],[36] (22,800,000)                              
Fair Value [3],[10],[36] $ (21,200,000)                              
Investment, Identifier [Axis]: One Call Care Management Inc, Other Senior Debt, Health Care Equipment & Services | Maximum                                
Interest rate, paid in kind [7],[10],[36] 8.50% 8.50% 8.50% 8.50% 8.50% 8.50%                    
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock A                                
Number of Shares | shares [28],[34],[35]               371,992 371,992 371,992 371,992 371,992 371,992      
Amortized Cost [28],[34],[35]               $ (22,800,000)                
Fair Value [4],[28],[34],[35]               $ (26,100,000)                
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock A, Equity/Other, Health Care Equipment & Services                                
Number of Shares | shares [10],[33],[36] 371,992 371,992 371,992 371,992 371,992 371,992                    
Amortized Cost [10],[33],[36] $ (22,800,000)                              
Fair Value [3],[10],[33],[36] $ (22,500,000)                              
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock B                                
Variable rate 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%                    
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock B | Maximum                                
Variable rate 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%                    
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock B 1                                
Interest rate, paid in kind [16],[34],[35]               9.00% 9.00% 9.00% 9.00% 9.00% 9.00%      
Number of Shares | shares [34],[35]               7,672,347 7,672,347 7,672,347 7,672,347 7,672,347 7,672,347      
Amortized Cost [34],[35]               $ (8,000,000.0)                
Fair Value [4],[34],[35]               $ (9,200,000)                
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock B 1 | Maximum                                
Interest rate, paid in kind [16],[34],[35]               9.00% 9.00% 9.00% 9.00% 9.00% 9.00%      
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock B 2                                
Interest rate, paid in kind               900.00% 900.00% 900.00% 900.00% 900.00% 900.00%      
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock B 2 | Maximum                                
Interest rate, paid in kind               900.00% 900.00% 900.00% 900.00% 900.00% 900.00%      
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock B, Equity/Other, Health Care Equipment & Services                                
Interest rate, paid in kind [7],[10],[36] 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%                    
Number of Shares | shares [10],[36] 7,672,347 7,672,347 7,672,347 7,672,347 7,672,347 7,672,347                    
Amortized Cost [10],[36] $ (8,000,000.0)                              
Fair Value [3],[10],[36] $ (7,700,000)                              
Investment, Identifier [Axis]: One Call Care Management Inc, Preferred Stock B, Equity/Other, Health Care Equipment & Services | Maximum                                
Interest rate, paid in kind [7],[10],[36] 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%                    
Investment, Identifier [Axis]: One Call Care Management Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services                                
Variable rate [7],[10],[36],[41] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[10],[36],[41] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15],[36],[41] $ 4,900,000                              
Amortized Cost [10],[36],[41] (4,700,000)                              
Fair Value [3],[10],[36],[41] $ (3,700,000)                              
Investment, Identifier [Axis]: Opendoor Labs Inc, Structured Mezzanine, Asset Based Finance, Real Estate - 2                                
Investment interest rate [16],[17],[29]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00%      
Principal amount [17],[18],[29]               $ 88,900,000                
Amortized Cost [17],[29]               (88,900,000)                
Fair Value [4],[17],[29]               $ (88,900,000)                
Investment, Identifier [Axis]: Opendoor Labs Inc, Structured Mezzanine, Asset Based Finance, Real Estate -1                                
Investment interest rate [16],[29],[35]               10.00% 10.00% 10.00% 10.00% 10.00% 10.00%      
Principal amount [18],[29],[35]               $ 71,100,000                
Amortized Cost [29],[35]               (71,100,000)                
Fair Value [4],[29],[35]               $ (71,100,000)                
Investment, Identifier [Axis]: Opendoor Labs Inc, Structured Mezzanine, Asset Based Finance, Real Estate 1                                
Variable rate [7],[10],[11] 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%                    
Principal amount [10],[11],[15] $ 106,600,000                              
Amortized Cost [10],[11] (106,600,000)                              
Fair Value [3],[10],[11] $ (101,600,000)                              
Investment, Identifier [Axis]: Opendoor Labs Inc, Structured Mezzanine, Asset Based Finance, Real Estate 2                                
Variable rate [7],[11],[22] 10.00% 10.00% 10.00% 10.00% 10.00% 10.00%                    
Principal amount [11],[15],[22] $ 53,400,000                              
Amortized Cost [11],[22] (53,400,000)                              
Fair Value [3],[11],[22] $ (50,900,000)                              
Investment, Identifier [Axis]: Orchard Marine Limited, Class B Common Stock                                
Number of Shares | shares [28],[29],[35],[45]               1,964 1,964 1,964 1,964 1,964 1,964      
Amortized Cost [28],[29],[35],[45]               $ (3,100,000)                
Fair Value [4],[28],[29],[35],[45]               $ 0                
Investment, Identifier [Axis]: Orchard Marine Limited, Series A Preferred Stock                                
Number of Shares | shares [28],[29],[35],[45]               62,976 62,976 62,976 62,976 62,976 62,976      
Amortized Cost [28],[29],[35],[45]               $ (62,000,000.0)                
Fair Value [4],[28],[29],[35],[45]               $ (64,600,000)                
Investment, Identifier [Axis]: Oxford Global Resources LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 1                                
Variable rate [7],[13],[14],[23],[24],[44] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[13],[14],[23],[24],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [13],[14],[15],[23],[24],[44] $ 87,700,000                              
Amortized Cost [13],[14],[23],[24],[44] (87,000,000.0)                              
Fair Value [3],[13],[14],[23],[24],[44] $ (87,200,000)                              
Investment, Identifier [Axis]: Oxford Global Resources LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 2                                
Variable rate [7],[10] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 3,200,000                              
Amortized Cost [10] (3,200,000)                              
Fair Value [3],[10] $ (3,200,000)                              
Investment, Identifier [Axis]: Oxford Global Resources LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 3                                
Variable rate [7],[22] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 15,300,000                              
Amortized Cost [22] (15,300,000)                              
Fair Value [3],[22] $ (15,200,000)                              
Investment, Identifier [Axis]: Oxford Global Resources LLC, Senior Secured Loans - First Lien, Commercial & Professional Services 4                                
Variable rate [7],[22] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 4,400,000                              
Amortized Cost [22] (4,400,000)                              
Fair Value [3],[22] $ (4,400,000)                              
Investment, Identifier [Axis]: Oxford Global Resources LLC, Senior Secured Loans—First Lien, Commercial & Professional Services - 3                                
Variable rate [16],[17]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 15,300,000                
Amortized Cost [17]               (15,300,000)                
Fair Value [4],[17]               $ (15,300,000)                
Investment, Identifier [Axis]: Oxford Global Resources LLC, Senior Secured Loans—First Lien, Commercial & Professional Services - 4                                
Variable rate [16],[17]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 3,700,000                
Amortized Cost [17]               (3,700,000)                
Fair Value [4],[17]               $ (3,700,000)                
Investment, Identifier [Axis]: Oxford Global Resources LLC, Senior Secured Loans—First Lien, Commercial & Professional Services -1                                
Variable rate [16],[19],[20],[42],[43],[47]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [19],[20],[42],[43],[47]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[19],[20],[42],[43],[47]               $ 88,400,000                
Amortized Cost [19],[20],[42],[43],[47]               (87,600,000)                
Fair Value [4],[19],[20],[42],[43],[47]               $ (88,200,000)                
Investment, Identifier [Axis]: Oxford Global Resources LLC, Senior Secured Loans—First Lien, Commercial & Professional Services -2                                
Variable rate [16],[35]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 4,000,000.0                
Amortized Cost [35]               (4,000,000.0)                
Fair Value [4],[35]               $ (4,000,000.0)                
Investment, Identifier [Axis]: P2 Energy Solutions Inc., Senior Secured Loans - First Lien, Software & Services 1                                
Variable rate [7],[10] 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 3,700,000                              
Amortized Cost [10] (3,500,000)                              
Fair Value [3],[10] $ (3,700,000)                              
Investment, Identifier [Axis]: P2 Energy Solutions Inc., Senior Secured Loans - First Lien, Software & Services 2                                
Variable rate [7],[10],[12],[13],[24],[39],[44] 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%                    
Base Rate Floor [7],[10],[12],[13],[24],[39],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[12],[13],[15],[24],[39],[44] $ 247,200,000                              
Amortized Cost [10],[12],[13],[24],[39],[44] (233,200,000)                              
Fair Value [3],[10],[12],[13],[24],[39],[44] $ (242,600,000)                              
Investment, Identifier [Axis]: P2 Energy Solutions Inc., Senior Secured Loans - First Lien, Software & Services 3                                
Variable rate [7],[22] 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 11,400,000                              
Amortized Cost [22] (11,400,000)                              
Fair Value [3],[22] $ (11,200,000)                              
Investment, Identifier [Axis]: P2 Energy Solutions Inc., Senior Secured Loans—First Lien, Software & Services - 1                                
Variable rate [16],[35]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 4,600,000                
Amortized Cost [35]               (4,300,000)                
Fair Value [4],[35]               $ (4,200,000)                
Investment, Identifier [Axis]: P2 Energy Solutions Inc., Senior Secured Loans—First Lien, Software & Services - 2                                
Variable rate [16],[19],[21],[35],[37],[42],[43],[47]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75%      
Base Rate Floor [19],[21],[35],[37],[42],[43],[47]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[19],[21],[35],[37],[42],[43],[47]               $ 249,100,000                
Amortized Cost [19],[21],[35],[37],[42],[43],[47]               (232,700,000)                
Fair Value [4],[19],[21],[35],[37],[42],[43],[47]               $ (232,000,000.0)                
Investment, Identifier [Axis]: P2 Energy Solutions Inc., Senior Secured Loans—First Lien, Software & Services - 3                                
Variable rate [16],[17]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 10,600,000                
Amortized Cost [17]               (10,600,000)                
Fair Value [4],[17]               $ (9,900,000)                
Investment, Identifier [Axis]: PRG III LLC, Preferred Stock, Series A PIK                                
Number of Shares | shares [28],[34],[35]               434,250 434,250 434,250 434,250 434,250 434,250      
Amortized Cost [28],[34],[35]               $ (18,100,000)                
Fair Value [4],[28],[34],[35]               $ (17,400,000)                
Investment, Identifier [Axis]: PRG III LLC, Preferred Stock, Series A PIK, Equity/Other, Media & Entertainment                                
Number of Shares | shares [10],[33],[36] 434,250 434,250 434,250 434,250 434,250 434,250                    
Amortized Cost [10],[33],[36] $ (18,100,000)                              
Fair Value [3],[10],[33],[36] $ (63,400,000)                              
Investment, Identifier [Axis]: PRG III LLC, Preferred Stock, Series B PIK                                
Number of Shares | shares [28],[34],[35]               140 140 140 140 140 140      
Amortized Cost [28],[34],[35]               $ 0                
Fair Value [4],[28],[34],[35]               $ 0                
Investment, Identifier [Axis]: PRG III LLC, Preferred Stock, Series B PIK, Equity/Other, Media & Entertainment                                
Number of Shares | shares [10],[33],[36] 140 140 140 140 140 140                    
Amortized Cost [10],[33],[36] $ 0                              
Fair Value [3],[10],[33],[36] $ 0                              
Investment, Identifier [Axis]: PSKW LLC                                
Variable rate [16],[20],[21],[35],[37],[42]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [20],[21],[35],[37],[42]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[20],[21],[35],[37],[42]               $ 294,700,000                
Amortized Cost [20],[21],[35],[37],[42]               (283,500,000)                
Fair Value [4],[20],[21],[35],[37],[42]               $ (294,700,000)                
Investment, Identifier [Axis]: PSKW LLC (dba ConnectiveRx), Senior Secured Loans - First Lien, Health Care Equipment & Services                                
Variable rate [7],[10],[12],[14],[24],[39] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10],[12],[14],[24],[39] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[12],[14],[15],[24],[39] $ 292,500,000                              
Amortized Cost [10],[12],[14],[24],[39] (283,000,000.0)                              
Fair Value [3],[10],[12],[14],[24],[39] $ (292,500,000)                              
Investment, Identifier [Axis]: Parata Systems, Senior Secured Loans—First Lien, Health Care Equipment & Services -1                                
Variable rate [16],[35],[43],[47]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [35],[43],[47]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[43],[47]               $ 73,900,000                
Amortized Cost [35],[43],[47]               (73,400,000)                
Fair Value [4],[35],[43],[47]               $ (74,100,000)                
Investment, Identifier [Axis]: Parata Systems, Senior Secured Loans—First Lien, Health Care Equipment & Services -2                                
Variable rate [16],[17]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 22,000,000.0                
Amortized Cost [17]               (22,000,000.0)                
Fair Value [4],[17]               $ (22,100,000)                
Investment, Identifier [Axis]: Parata Systems, Senior Secured Loans—First Lien, Health Care Equipment & Services -3                                
Variable rate [16],[17]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 5,500,000                
Amortized Cost [17]               (5,500,000)                
Fair Value [4],[17]               $ (5,500,000)                
Investment, Identifier [Axis]: Parts Town LLC, Senior Secured Loans - First Lien, Retailing                                
Variable rate [7],[10] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 100,600,000                              
Amortized Cost [10] (99,700,000)                              
Fair Value [3],[10] $ (97,400,000)                              
Investment, Identifier [Axis]: Parts Town LLC, Senior Secured Loans—First Lien, Retailing - 1                                
Variable rate [16],[35]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[35]               $ 87,400,000                
Amortized Cost [35]               (86,600,000)                
Fair Value [4],[35]               $ (86,600,000)                
Investment, Identifier [Axis]: Parts Town LLC, Senior Secured Loans—First Lien, Retailing - 2                                
Variable rate [16],[17]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 63,900,000                
Amortized Cost [17]               (63,900,000)                
Fair Value [4],[17]               $ (63,300,000)                
Investment, Identifier [Axis]: PartsSource Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 1                                
Variable rate [7],[10] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 65,300,000                              
Amortized Cost [10] (64,600,000)                              
Fair Value [3],[10] $ (64,100,000)                              
Investment, Identifier [Axis]: PartsSource Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 2                                
Variable rate [7],[22] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 4,300,000                              
Amortized Cost [22] (4,200,000)                              
Fair Value [3],[22] $ (4,200,000)                              
Investment, Identifier [Axis]: PartsSource Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services 3                                
Variable rate [7],[22] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 22,900,000                              
Amortized Cost [22] (22,600,000)                              
Fair Value [3],[22] $ (22,500,000)                              
Investment, Identifier [Axis]: PartsSource Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services -1                                
Variable rate [16],[35]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[35]               $ 65,800,000                
Amortized Cost [35]               (65,000,000.0)                
Fair Value [4],[35]               $ (64,700,000)                
Investment, Identifier [Axis]: PartsSource Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services -2                                
Variable rate [16],[17]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 4,300,000                
Amortized Cost [17]               (4,200,000)                
Fair Value [4],[17]               $ (4,200,000)                
Investment, Identifier [Axis]: PartsSource Inc, Senior Secured Loans—First Lien, Health Care Equipment & Services -3                                
Variable rate [16],[17]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 22,900,000                
Amortized Cost [17]               (22,600,000)                
Fair Value [4],[17]               $ (22,500,000)                
Investment, Identifier [Axis]: Peraton Corp                                
Variable rate [16],[35],[40]               3.75% 3.75% 3.75% 3.75% 3.75% 3.75%      
Base Rate Floor [35],[40]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[35],[40]               $ 9,000,000.0                
Amortized Cost [35],[40]               (8,700,000)                
Fair Value [4],[35],[40]               $ (9,000,000.0)                
Investment, Identifier [Axis]: Peraton Corp, Senior Secured Loans -Second Lien, Capital Goods 1                                
Variable rate [7],[10],[39] 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%                    
Base Rate Floor [7],[10],[39] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[39] $ 175,000,000.0                              
Amortized Cost [10],[39] (166,000,000.0)                              
Fair Value [3],[10],[39] $ (172,000,000.0)                              
Investment, Identifier [Axis]: Peraton Corp, Senior Secured Loans -Second Lien, Capital Goods 2                                
Variable rate [7],[10] 7.75% 7.75% 7.75% 7.75% 7.75% 7.75%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 130,400,000                              
Amortized Cost [10] (124,700,000)                              
Fair Value [3],[10] $ (129,400,000)                              
Investment, Identifier [Axis]: Peraton Corp, Senior Secured Loans—Second Lien, Capital Goods - 1                                
Variable rate [16],[35],[37]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00%      
Base Rate Floor [35],[37]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[37]               $ 175,000,000.0                
Amortized Cost [35],[37]               (165,300,000)                
Fair Value [4],[35],[37]               $ (178,500,000)                
Investment, Identifier [Axis]: Peraton Corp, Senior Secured Loans—Second Lien, Capital Goods - 2                                
Variable rate [16],[35]               7.75% 7.75% 7.75% 7.75% 7.75% 7.75%      
Base Rate Floor [35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[35]               $ 156,400,000                
Amortized Cost [35]               (149,900,000)                
Fair Value [4],[35]               $ (158,700,000)                
Investment, Identifier [Axis]: Performance Health Holdings Inc                                
Variable rate [16],[21],[35],[47]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [21],[35],[47]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[21],[35],[47]               $ 120,700,000                
Amortized Cost [21],[35],[47]               (119,500,000)                
Fair Value [4],[21],[35],[47]               $ (120,200,000)                
Investment, Identifier [Axis]: Performance Health Holdings Inc, Senior Secured Loans - First Lien, Health Care Equipment & Services                                
Variable rate [7],[10],[12],[23],[44] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[10],[12],[23],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[12],[15],[23],[44] $ 108,300,000                              
Amortized Cost [10],[12],[23],[44] (107,400,000)                              
Fair Value [3],[10],[12],[23],[44] $ (107,300,000)                              
Investment, Identifier [Axis]: Petrochoice Holdings Inc                                
Variable rate [16],[35]               8.75% 8.75% 8.75% 8.75% 8.75% 8.75%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 65,000,000.0                
Amortized Cost [35]               (64,400,000)                
Fair Value [4],[35]               $ (57,600,000)                
Investment, Identifier [Axis]: Petroplex Acidizing Inc                                
Variable rate [16],[25],[28],[35],[45]               8.25% 8.25% 8.25% 8.25% 8.25% 8.25%      
Interest rate, paid in kind [16],[25],[28],[35],[45]               1.80% 1.80% 1.80% 1.80% 1.80% 1.80%      
Base Rate Floor [25],[28],[35],[45]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[25],[28],[35],[45]               $ 27,000,000.0                
Amortized Cost [25],[28],[35],[45]               (22,000,000.0)                
Fair Value [4],[25],[28],[35],[45]               $ (9,700,000)                
Investment, Identifier [Axis]: Petroplex Acidizing Inc | Maximum                                
Interest rate, paid in kind [16],[25],[28],[35],[45]               1.80% 1.80% 1.80% 1.80% 1.80% 1.80%      
Investment, Identifier [Axis]: Petroplex Acidizing Inc, Preferred Stock A                                
Number of Shares | shares [28],[35],[45]               25,138,631 25,138,631 25,138,631 25,138,631 25,138,631 25,138,631      
Amortized Cost [28],[35],[45]               $ (4,900,000)                
Fair Value [4],[28],[35],[45]               $ 0                
Investment, Identifier [Axis]: Petroplex Acidizing Inc, Trade Claim, Equity/Other, Energy                                
Number of Shares | shares [10],[33] 646,309 646,309 646,309 646,309 646,309 646,309                    
Amortized Cost [10],[33] $ (600,000)                              
Fair Value [3],[10],[33] $ (600,000)                              
Investment, Identifier [Axis]: Petroplex Acidizing Inc, Warrant                                
Number of Shares | shares [28],[35],[45]               8 8 8 8 8 8      
Amortized Cost [28],[35],[45]               $ 0                
Fair Value [4],[28],[35],[45]               $ 0                
Investment, Identifier [Axis]: Polyconcept North America Inc                                
Variable rate [16],[35],[40]               4.50% 4.50% 4.50% 4.50% 4.50% 4.50%      
Interest rate, paid in kind [16],[35]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00%      
Base Rate Floor [35],[40]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[40]               $ 22,800,000                
Amortized Cost [35],[40]               (22,600,000)                
Fair Value [4],[35],[40]               $ (22,700,000)                
Investment, Identifier [Axis]: Polyconcept North America Inc | Maximum                                
Variable rate [16],[35],[40]               4.50% 4.50% 4.50% 4.50% 4.50% 4.50%      
Interest rate, paid in kind [16],[35]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00%      
Investment, Identifier [Axis]: Polyconcept North America Inc 2/16/24                                
Principal amount [18],[35]               $ 10,000,000.0                
Amortized Cost [35]               (9,900,000)                
Fair Value [4],[35]               $ (10,000,000.0)                
Investment, Identifier [Axis]: Polyconcept North America Inc, Class A - 1 Units                                
Number of Shares | shares [28],[35]               30,000 30,000 30,000 30,000 30,000 30,000      
Amortized Cost [28],[35]               $ (3,000,000.0)                
Fair Value [4],[28],[35]               $ (4,300,000)                
Investment, Identifier [Axis]: Polyconcept North America Inc, Class A - 1 Units, Equity/Other, Household & Personal Products                                
Number of Shares | shares [10] 30,000 30,000 30,000 30,000 30,000 30,000                    
Amortized Cost [10] $ (3,000,000.0)                              
Fair Value [3],[10] $ (9,000,000.0)                              
Investment, Identifier [Axis]: Premium Credit Ltd 1                                
Variable rate [16],[29],[35]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50%      
Base Rate Floor [29],[35]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Principal amount | £ [18],[29],[35]                       £ 55.9        
Amortized Cost [29],[35]               $ (72,600,000)                
Fair Value [4],[29],[35]               $ (75,700,000)                
Investment, Identifier [Axis]: Premium Credit Ltd, Senior Secured Loans - First Lien, Diversified Financials                                
Variable rate [7],[10],[11] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                    
Base Rate Floor [7],[10],[11] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount | £ [10],[11],[15]         £ 55.9                      
Amortized Cost [10],[11] $ (73,100,000)                              
Fair Value [3],[10],[11] $ (62,200,000)                              
Investment, Identifier [Axis]: Pretium Partners LLC P1, Structured Mezzanine                                
Investment interest rate [16],[29],[35]               2.80% 2.80% 2.80% 2.80% 2.80% 2.80%      
Interest rate, paid in kind [16],[29],[35]               5.30% 5.30% 5.30% 5.30% 5.30% 5.30%      
Principal amount [18],[29],[35]               $ 6,700,000                
Amortized Cost [29],[35]               (6,200,000)                
Fair Value [4],[29],[35]               $ (6,800,000)                
Investment, Identifier [Axis]: Pretium Partners LLC P1, Structured Mezzanine | Maximum                                
Interest rate, paid in kind [16],[29],[35]               5.30% 5.30% 5.30% 5.30% 5.30% 5.30%      
Investment, Identifier [Axis]: Pretium Partners LLC P1, Structured Mezzanine 1                                
Variable rate               280.00% 280.00% 280.00% 280.00% 280.00% 280.00%      
Interest rate, paid in kind               530.00% 530.00% 530.00% 530.00% 530.00% 530.00%      
Investment, Identifier [Axis]: Pretium Partners LLC P1, Structured Mezzanine 1 | Maximum                                
Interest rate, paid in kind               530.00% 530.00% 530.00% 530.00% 530.00% 530.00%      
Investment, Identifier [Axis]: Pretium Partners LLC P2, Private Equity                                
Number of Shares | shares [28],[29],[35]               16,772,368 16,772,368 16,772,368 16,772,368 16,772,368 16,772,368      
Amortized Cost [28],[29],[35]               $ (16,400,000)                
Fair Value [4],[28],[29],[35]               $ (16,400,000)                
Investment, Identifier [Axis]: Pretium Partners LLC P2, Term Loan                                
Investment interest rate [10],[11],[16]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00%      
Principal amount [10],[11],[18],[29],[35]               $ 33,500,000                
Amortized Cost [29],[35]               (32,900,000)                
Fair Value [4],[29],[35]               $ (32,900,000)                
Investment, Identifier [Axis]: Pretium Partners LLC P2, Term Loan, Asset Based Finance, Real Estate                                
Variable rate [7],[10],[11] 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%                    
Principal amount [10],[11],[15] $ 33,500,000                              
Amortized Cost [10],[11] (32,900,000)                              
Fair Value [3],[10],[11] $ (32,900,000)                              
Investment, Identifier [Axis]: Prime ST LLC, Private Equity                                
Number of Shares | shares [28],[29],[34],[35]               5,983,135 5,983,135 5,983,135 5,983,135 5,983,135 5,983,135      
Amortized Cost [28],[29],[34],[35]               $ (7,700,000)                
Fair Value [4],[28],[29],[34],[35]               $ (9,100,000)                
Investment, Identifier [Axis]: Prime ST LLC, Private Equity, Asset Based Finance, Real Estate                                
Number of Shares | shares [10],[11],[33],[36] 5,983,135 5,983,135 5,983,135 5,983,135 5,983,135 5,983,135                    
Amortized Cost [10],[11],[33],[36] $ (7,700,000)                              
Fair Value [3],[10],[11],[33],[36] $ 0                              
Investment, Identifier [Axis]: Prime ST LLC, Structured Mezzanine                                
Investment interest rate [16],[29],[34],[35]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00%      
Interest rate, paid in kind [16],[29],[34],[35]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Principal amount [18],[29],[34],[35]               $ 52,400,000                
Amortized Cost [29],[34],[35]               (50,400,000)                
Fair Value [4],[29],[34],[35]               $ (52,400,000)                
Investment, Identifier [Axis]: Prime ST LLC, Structured Mezzanine | Maximum                                
Interest rate, paid in kind [16],[29],[34],[35]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Investment, Identifier [Axis]: Prime ST LLC, Structured Mezzanine, Asset Based Finance, Real Estate                                
Variable rate [7],[10],[11],[36] 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%                    
Interest rate, paid in kind [7],[10],[11],[36] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Principal amount [10],[11],[15],[36] $ 52,400,000                              
Amortized Cost [10],[11],[36] (50,500,000)                              
Fair Value [3],[10],[11],[36] $ (47,700,000)                              
Investment, Identifier [Axis]: Prime ST LLC, Structured Mezzanine, Asset Based Finance, Real Estate | Maximum                                
Interest rate, paid in kind [7],[10],[11],[36] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans - First Lien, Media & Entertainment 1                                
Variable rate [7],[10],[36] 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%                    
Interest rate, paid in kind [7],[10],[36] 3.10% 3.10% 3.10% 3.10% 3.10% 3.10%                    
Base Rate Floor [7],[10],[36] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[36] $ 62,300,000                              
Amortized Cost [10],[36] (59,200,000)                              
Fair Value [3],[10],[36] $ (64,200,000)                              
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans - First Lien, Media & Entertainment 1 | Maximum                                
Interest rate, paid in kind [7],[10],[36] 3.10% 3.10% 3.10% 3.10% 3.10% 3.10%                    
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans - First Lien, Media & Entertainment 2                                
Variable rate [7],[10],[36] 3.00% 3.00% 3.00% 3.00% 3.00% 3.00%                    
Interest rate, paid in kind [7],[10],[36] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[10],[36] 0.30% 0.30% 0.30% 0.30% 0.30% 0.30%                    
Principal amount [10],[15],[36] $ 146,400,000                              
Amortized Cost [10],[36] (140,000,000.0)                              
Fair Value [3],[10],[36] $ (149,400,000)                              
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans - First Lien, Media & Entertainment 2 | Maximum                                
Interest rate, paid in kind [7],[10],[36] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans - First Lien, Media & Entertainment 3                                
Variable rate [7],[10],[36] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[10],[36] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[36] $ 100,000                              
Amortized Cost [10],[36] (100,000)                              
Fair Value [3],[10],[36] $ (100,000)                              
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans - First Lien, Media & Entertainment 3 | Maximum                                
Variable rate [7],[10],[36] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans - First Lien, Media & Entertainment 4                                
Variable rate [7],[10],[36] 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%                    
Interest rate, paid in kind [7],[10],[36] 3.10% 3.10% 3.10% 3.10% 3.10% 3.10%                    
Base Rate Floor [7],[10],[36] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[36] $ 34,300,000                              
Amortized Cost [10],[36] (34,100,000)                              
Fair Value [3],[10],[36] $ (34,600,000)                              
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans - First Lien, Media & Entertainment 4 | Maximum                                
Interest rate, paid in kind [7],[10],[36] 3.10% 3.10% 3.10% 3.10% 3.10% 3.10%                    
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -1                                
Variable rate [16],[34],[35]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00%      
Interest rate, paid in kind [16],[34],[35]               3.10% 3.10% 3.10% 3.10% 3.10% 3.10%      
Base Rate Floor [34],[35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[34],[35]               $ 64,400,000                
Amortized Cost [34],[35]               (60,200,000)                
Fair Value [4],[34],[35]               $ (64,400,000)                
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -1 | Maximum                                
Interest rate, paid in kind [16],[34],[35]               3.10% 3.10% 3.10% 3.10% 3.10% 3.10%      
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -2                                
Variable rate [16],[34],[35]               3.00% 3.00% 3.00% 3.00% 3.00% 3.00%      
Interest rate, paid in kind [16],[34],[35]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [34],[35]               0.30% 0.30% 0.30% 0.30% 0.30% 0.30%      
Principal amount [18],[34],[35]               $ 133,300,000                
Amortized Cost [34],[35]               (124,900,000)                
Fair Value [4],[34],[35]               $ (133,300,000)                
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -2 | Maximum                                
Interest rate, paid in kind [16],[34],[35]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -3                                
Variable rate [16],[34],[35]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [34],[35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[34],[35]               $ 100,000                
Amortized Cost [34],[35]               (100,000)                
Fair Value [4],[34],[35]               $ (100,000)                
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -3 | Maximum                                
Variable rate [16],[34],[35]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -4                                
Variable rate [16],[34],[35]               7.50% 7.50% 7.50% 7.50% 7.50% 7.50%      
Interest rate, paid in kind [16],[34],[35]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Base Rate Floor [34],[35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[34],[35]               $ 20,200,000                
Amortized Cost [34],[35]               (20,100,000)                
Fair Value [4],[34],[35]               $ (20,200,000)                
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -4 | Maximum                                
Interest rate, paid in kind [16],[34],[35]               3.10% 3.10% 3.10% 3.10% 3.10% 3.10%      
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -5                                
Variable rate [16],[17],[34]               7.50% 7.50% 7.50% 7.50% 7.50% 7.50%      
Interest rate, paid in kind [16],[17],[34]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Base Rate Floor [17],[34]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18],[34]               $ 10,100,000                
Amortized Cost [17],[34]               (10,100,000)                
Fair Value [4],[17],[34]               $ (10,100,000)                
Investment, Identifier [Axis]: Production Resource Group LLC, Senior Secured Loans—First Lien, Media & Entertainment -5 | Maximum                                
Interest rate, paid in kind [16],[17],[34]               3.10% 3.10% 3.10% 3.10% 3.10% 3.10%      
Investment, Identifier [Axis]: Propulsion Acquisition LLC                                
Variable rate [16],[20],[35],[37],[42],[47]               7.00% 7.00% 7.00% 7.00% 7.00% 7.00%      
Base Rate Floor [20],[35],[37],[42],[47]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[20],[35],[37],[42],[47]               $ 60,500,000                
Amortized Cost [20],[35],[37],[42],[47]               (56,800,000)                
Fair Value [4],[20],[35],[37],[42],[47]               $ (61,100,000)                
Investment, Identifier [Axis]: Propulsion Acquisition LLC, Senior Secured Loans - First Lien, Capital Goods                                
Variable rate [7],[10],[14],[23],[24],[39] 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%                    
Base Rate Floor [7],[10],[14],[23],[24],[39] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[14],[15],[23],[24],[39] $ 60,000,000.0                              
Amortized Cost [10],[14],[23],[24],[39] (57,300,000)                              
Fair Value [3],[10],[14],[23],[24],[39] $ (60,000,000.0)                              
Investment, Identifier [Axis]: Proserv Acquisition LLC, Class A Common Units                                
Number of Shares | shares [28],[29],[35],[45]               2,635,005 2,635,005 2,635,005 2,635,005 2,635,005 2,635,005      
Amortized Cost [28],[29],[35],[45]               $ (33,400,000)                
Fair Value [4],[28],[29],[35],[45]               $ (100,000)                
Investment, Identifier [Axis]: Proserv Acquisition LLC, Class A Common Units, Equity/Other, Energy                                
Number of Shares | shares [10],[11],[33],[46] 2,635,005 2,635,005 2,635,005 2,635,005 2,635,005 2,635,005                    
Amortized Cost [10],[11],[33],[46] $ (33,500,000)                              
Fair Value [3],[10],[11],[33],[46] $ (500,000)                              
Investment, Identifier [Axis]: Proserv Acquisition LLC, Class A Preferred Units                                
Number of Shares | shares [28],[29],[35],[45]               837,780 837,780 837,780 837,780 837,780 837,780      
Amortized Cost [28],[29],[35],[45]               $ (5,400,000)                
Fair Value [4],[28],[29],[35],[45]               $ (9,300,000)                
Investment, Identifier [Axis]: Proserv Acquisition LLC, Class A Preferred Units, Equity/Other, Energy                                
Number of Shares | shares [10],[11],[33],[46] 837,780 837,780 837,780 837,780 837,780 837,780                    
Amortized Cost [10],[11],[33],[46] $ (5,400,000)                              
Fair Value [3],[10],[11],[33],[46] $ (9,000,000.0)                              
Investment, Identifier [Axis]: Pure Fishing Inc 1                                
Variable rate [16],[35],[43],[47]               8.38% 8.38% 8.38% 8.38% 8.38% 8.38%      
Base Rate Floor [35],[43],[47]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[43],[47]               $ 177,000,000.0                
Amortized Cost [35],[43],[47]               (170,600,000)                
Fair Value [4],[35],[43],[47]               $ (168,100,000)                
Investment, Identifier [Axis]: Pure Fishing Inc, Senior Secured Loans - First Lien, Consumer Durables & Apparel                                
Variable rate [7],[10],[41] 4.50% 4.50% 4.50% 4.50% 4.50% 4.50%                    
Base Rate Floor [7],[10],[41] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount [10],[15],[41] $ 33,800,000                              
Amortized Cost [10],[41] (33,200,000)                              
Fair Value [3],[10],[41] $ (28,000,000.0)                              
Investment, Identifier [Axis]: Pure Fishing Inc, Senior Secured Loans -Second Lien, Consumer Durables & Apparel                                
Variable rate [7],[10],[44] 8.38% 8.38% 8.38% 8.38% 8.38% 8.38%                    
Base Rate Floor [7],[10],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[44] $ 100,000,000.0                              
Amortized Cost [10],[44] (95,100,000)                              
Fair Value [3],[10],[44] $ (86,700,000)                              
Investment, Identifier [Axis]: Qdoba Restaurant Corp                                
Variable rate [16],[35],[40],[43]               7.00% 7.00% 7.00% 7.00% 7.00% 7.00%      
Base Rate Floor [35],[40],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[40],[43]               $ 10,900,000                
Amortized Cost [35],[40],[43]               (10,800,000)                
Fair Value [4],[35],[40],[43]               $ (10,800,000)                
Investment, Identifier [Axis]: Qdoba Restaurant Corp, Senior Secured Loans - First Lien, Consumer Services                                
Variable rate [7],[10],[41],[44] 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%                    
Base Rate Floor [7],[10],[41],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[41],[44] $ 10,900,000                              
Amortized Cost [10],[41],[44] (10,800,000)                              
Fair Value [3],[10],[41],[44] $ (10,800,000)                              
Investment, Identifier [Axis]: Quorum Health Corp, Trade Claim                                
Number of Shares | shares [28],[35]               8,301,000 8,301,000 8,301,000 8,301,000 8,301,000 8,301,000      
Amortized Cost [28],[35]               $ (700,000)                
Fair Value [4],[28],[35]               $ (900,000)                
Investment, Identifier [Axis]: Quorum Health Corp, Trade Claim, Equity/Other, Health Care Equipment & Services                                
Number of Shares | shares [10],[33] 8,301,000 8,301,000 8,301,000 8,301,000 8,301,000 8,301,000                    
Amortized Cost [10],[33] $ (700,000)                              
Fair Value [3],[10],[33] $ (900,000)                              
Investment, Identifier [Axis]: Quorum Health Corp, Trust Initial Funding Units                                
Number of Shares | shares [28],[35]               143,400 143,400 143,400 143,400 143,400 143,400      
Amortized Cost [28],[35]               $ (200,000)                
Fair Value [4],[28],[35]               $ (200,000)                
Investment, Identifier [Axis]: Quorum Health Corp, Trust Initial Funding Units, Equity/Other, Health Care Equipment & Services                                
Number of Shares | shares [10],[33] 143,400 143,400 143,400 143,400 143,400 143,400                    
Amortized Cost [10],[33] $ (200,000)                              
Fair Value [3],[10],[33] $ (200,000)                              
Investment, Identifier [Axis]: RSC Insurance Brokerage Inc, Senior Secured Loans—First Lien, Insurance -1                                
Variable rate [16],[19],[20],[21],[35],[37],[43],[47]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [19],[20],[21],[35],[37],[43],[47]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[19],[20],[21],[35],[37],[43],[47]               $ 277,800,000                
Amortized Cost [19],[20],[21],[35],[37],[43],[47]               (268,100,000)                
Fair Value [4],[19],[20],[21],[35],[37],[43],[47]               $ (280,600,000)                
Investment, Identifier [Axis]: RSC Insurance Brokerage Inc, Senior Secured Loans—First Lien, Insurance -2                                
Variable rate [16],[35]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[35]               $ 4,100,000                
Amortized Cost [35]               (4,000,000.0)                
Fair Value [4],[35]               $ (4,100,000)                
Investment, Identifier [Axis]: RSC Insurance Brokerage Inc, Senior Secured Loans—First Lien, Insurance -3                                
Variable rate [16],[17]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 16,100,000                
Amortized Cost [17]               (16,100,000)                
Fair Value [4],[17]               $ (16,300,000)                
Investment, Identifier [Axis]: RSC Insurance Brokerage Inc, Senior Secured Loans—First Lien, Insurance -4                                
Variable rate [16],[17]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 3,600,000                
Amortized Cost [17]               (3,600,000)                
Fair Value [4],[17]               $ (3,600,000)                
Investment, Identifier [Axis]: RSC Insurance Brokerage Inc, Senior Secured Loans - First Lien, Insurance 1                                
Variable rate [7],[10],[12],[13],[14],[39],[44] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[10],[12],[13],[14],[39],[44] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[12],[13],[14],[15],[39],[44] $ 240,600,000                              
Amortized Cost [10],[12],[13],[14],[39],[44] (234,700,000)                              
Fair Value [3],[10],[12],[13],[14],[39],[44] $ (239,000,000.0)                              
Investment, Identifier [Axis]: RSC Insurance Brokerage Inc, Senior Secured Loans - First Lien, Insurance 2                                
Variable rate [7],[22] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 7,700,000                              
Amortized Cost [22] (7,600,000)                              
Fair Value [3],[22] $ (7,700,000)                              
Investment, Identifier [Axis]: Radwell International LLC/PA, Senior Secured Loans - First Lien, Capital Goods                                
Variable rate [7],[10] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 1,000,000.0                              
Amortized Cost [10] (1,000,000.0)                              
Fair Value [3],[10] $ (1,000,000.0)                              
Investment, Identifier [Axis]: Reliant Rehab Hospital Cincinnati LLC                                
Variable rate [16],[20],[21],[35],[37],[43],[47]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [20],[21],[35],[37],[43],[47]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Principal amount [18],[20],[21],[35],[37],[43],[47]               $ 126,800,000                
Amortized Cost [20],[21],[35],[37],[43],[47]               (120,700,000)                
Fair Value [4],[20],[21],[35],[37],[43],[47]               $ (124,100,000)                
Investment, Identifier [Axis]: Reliant Rehab Hospital Cincinnati LLC, Senior Secured Loans - First Lien, Health Care Equipment & Services                                
Variable rate [7],[10],[12],[14],[23],[39],[44] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10],[12],[14],[23],[39],[44] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount [10],[12],[14],[15],[23],[39],[44] $ 106,800,000                              
Amortized Cost [10],[12],[14],[23],[39],[44] (101,400,000)                              
Fair Value [3],[10],[12],[14],[23],[39],[44] $ (89,900,000)                              
Investment, Identifier [Axis]: Revere Superior Holdings Inc, Senior Secured Loans—First Lien, Software & Services - 1                                
Variable rate [16],[35],[43]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [35],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[43]               $ 23,000,000.0                
Amortized Cost [35],[43]               (22,400,000)                
Fair Value [4],[35],[43]               $ (23,300,000)                
Investment, Identifier [Axis]: Revere Superior Holdings Inc, Senior Secured Loans—First Lien, Software & Services - 2                                
Variable rate [16],[17]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 3,200,000                
Amortized Cost [17]               (3,200,000)                
Fair Value [4],[17]               $ (3,200,000)                
Investment, Identifier [Axis]: Revere Superior Holdings Inc, Senior Secured Loans—First Lien, Software & Services - 3                                
Variable rate [16],[35]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 3,300,000                
Amortized Cost [35]               (3,300,000)                
Fair Value [4],[35]               $ (3,400,000)                
Investment, Identifier [Axis]: Revere Superior Holdings Inc, Senior Secured Loans—First Lien, Software & Services - 4                                
Variable rate [16],[17]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 7,400,000                
Amortized Cost [17]               (7,400,000)                
Fair Value [4],[17]               $ (7,500,000)                
Investment, Identifier [Axis]: Revere Superior Holdings Inc, Senior Secured Loans - First Lien, Software & Services                                
Variable rate [7],[22] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 1,700,000                              
Amortized Cost [22] (1,700,000)                              
Fair Value [3],[22] $ (1,700,000)                              
Investment, Identifier [Axis]: Revere Superior Holdings Inc, Senior Secured Loans - First Lien, Software & Services 1                                
Variable rate [7],[10],[44] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[10],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[44] $ 33,600,000                              
Amortized Cost [10],[44] (32,900,000)                              
Fair Value [3],[10],[44] $ (33,600,000)                              
Investment, Identifier [Axis]: Revere Superior Holdings Inc, Senior Secured Loans - First Lien, Software & Services 2                                
Variable rate [7],[10] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 1,500,000                              
Amortized Cost [10] (1,500,000)                              
Fair Value [3],[10] $ (1,500,000)                              
Investment, Identifier [Axis]: Ridgeback Resources Inc, Common Stock                                
Number of Shares | shares [28],[29],[35],[56],[57]               1,969,418 1,969,418 1,969,418 1,969,418 1,969,418 1,969,418      
Amortized Cost [28],[29],[35],[56],[57]               $ (9,100,000)                
Fair Value [4],[28],[29],[35],[56],[57]               $ (9,900,000)                
Investment, Identifier [Axis]: Ridgeback Resources Inc, Common Stock, Equity/Other, Energy                                
Number of Shares | shares [8],[9],[10],[11] 1,969,418 1,969,418 1,969,418 1,969,418 1,969,418 1,969,418                    
Amortized Cost [8],[9],[10],[11] $ (8,000,000.0)                              
Fair Value [3],[8],[9],[10],[11] $ (8,300,000)                              
Investment, Identifier [Axis]: Rise Baking Company, Senior Secured Loans—First Lien, Food, Beverage & Tobacco -1                                
Variable rate [16],[35]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 2,800,000                
Amortized Cost [35]               (2,600,000)                
Fair Value [4],[35]               $ (2,700,000)                
Investment, Identifier [Axis]: Rise Baking Company, Senior Secured Loans—First Lien, Food, Beverage & Tobacco -2                                
Variable rate [16],[20],[43]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [20],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[20],[43]               $ 28,800,000                
Amortized Cost [20],[43]               (28,100,000)                
Fair Value [4],[20],[43]               $ (28,200,000)                
Investment, Identifier [Axis]: Rise Baking Company, Senior Secured Loans—First Lien, Food, Beverage & Tobacco -3                                
Variable rate [16],[17]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 2,500,000                
Amortized Cost [17]               (2,500,000)                
Fair Value [4],[17]               $ (2,500,000)                
Investment, Identifier [Axis]: Rise Baking Company, Senior Secured Loans - First Lien, Food, Beverage & Tobacco 1                                
Variable rate [7],[10] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 3,700,000                              
Amortized Cost [10] (3,600,000)                              
Fair Value [3],[10] $ (3,400,000)                              
Investment, Identifier [Axis]: Rise Baking Company, Senior Secured Loans - First Lien, Food, Beverage & Tobacco 2                                
Variable rate [7],[14],[44] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                    
Base Rate Floor [7],[14],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [14],[15],[44] $ 28,600,000                              
Amortized Cost [14],[44] (28,000,000.0)                              
Fair Value [3],[14],[44] $ (26,700,000)                              
Investment, Identifier [Axis]: Rise Baking Company, Senior Secured Loans - First Lien, Food, Beverage & Tobacco 3                                
Variable rate [7],[22] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 1,600,000                              
Amortized Cost [22] (1,600,000)                              
Fair Value [3],[22] $ (1,500,000)                              
Investment, Identifier [Axis]: Roemanu LLC (FKA Toorak Capital Partners LLC), Private Equity, Asset Based Finance, Real Estate                                
Number of Shares | shares [10],[36] 220,778,388 220,778,388 220,778,388 220,778,388 220,778,388 220,778,388                    
Amortized Cost [10],[36] $ (236,500,000)                              
Fair Value [3],[10],[36] $ (259,700,000)                              
Investment, Identifier [Axis]: SAMBA Safety Inc, Senior Secured Loans—First Lien, Software & Services -1                                
Variable rate [16],[17]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 2,400,000                
Amortized Cost [17]               (2,400,000)                
Fair Value [4],[17]               $ (2,400,000)                
Investment, Identifier [Axis]: SAMBA Safety Inc, Senior Secured Loans—First Lien, Software & Services -2                                
Variable rate [16],[17]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 6,100,000                
Amortized Cost [17]               (6,100,000)                
Fair Value [4],[17]               $ (6,000,000.0)                
Investment, Identifier [Axis]: SAMBA Safety Inc, Senior Secured Loans - First Lien, Software & Services 1                                
Variable rate [7],[10] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 6,100,000                              
Amortized Cost [10] (6,000,000.0)                              
Fair Value [3],[10] $ (6,000,000.0)                              
Investment, Identifier [Axis]: SAMBA Safety Inc, Senior Secured Loans - First Lien, Software & Services 2                                
Variable rate [7],[10] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 600,000                              
Amortized Cost [10] (600,000)                              
Fair Value [3],[10] $ (600,000)                              
Investment, Identifier [Axis]: SAMBA Safety Inc, Senior Secured Loans - First Lien, Software & Services 3                                
Variable rate [7],[22] 5.25% 5.25% 5.25% 5.25% 5.25% 5.25%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 1,800,000                              
Amortized Cost [22] (1,800,000)                              
Fair Value [3],[22] $ (1,800,000)                              
Investment, Identifier [Axis]: SIRVA Worldwide Inc                                
Variable rate [16],[35],[40]               9.50% 9.50% 9.50% 9.50% 9.50% 9.50%      
Base Rate Floor [35],[40]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Principal amount [18],[35],[40]               $ 6,500,000                
Amortized Cost [35],[40]               (5,400,000)                
Fair Value [4],[35],[40]               $ (5,700,000)                
Investment, Identifier [Axis]: Safe-Guard Products International LLC                                
Variable rate [16],[42],[43],[47]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00%      
Base Rate Floor [42],[43],[47]               0.50% 0.50% 0.50% 0.50% 0.50% 0.50%      
Principal amount [18],[42],[43],[47]               $ 45,100,000                
Amortized Cost [42],[43],[47]               (42,500,000)                
Fair Value [4],[42],[43],[47]               $ (45,100,000)                
Investment, Identifier [Axis]: Safe-Guard Products International LLC, Senior Secured Loans - First Lien, Diversified Financials                                
Variable rate [7],[23] 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%                    
Base Rate Floor [7],[23] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                    
Principal amount [15],[23] $ 100,000                              
Amortized Cost [23] (100,000)                              
Fair Value [3],[23] $ (100,000)                              
Investment, Identifier [Axis]: Saluda Grade Alternative Mortgage Trust 2022-BC2, Structured Mezzanine, Asset Based Finance, Real Estate 1                                
Variable rate [7],[10],[11] 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%                    
Number of Shares | shares [10],[11] 5,700,000 5,700,000 5,700,000 5,700,000 5,700,000 5,700,000                    
Amortized Cost [10],[11] $ (5,700,000)                              
Fair Value [3],[10],[11] $ (5,700,000)                              
Investment, Identifier [Axis]: Saluda Grade Alternative Mortgage Trust 2022-BC2, Structured Mezzanine, Asset Based Finance, Real Estate 2                                
Variable rate [7],[10],[11] 18.00% 18.00% 18.00% 18.00% 18.00% 18.00%                    
Number of Shares | shares [10],[11],[15] 3,400,000 3,400,000 3,400,000 3,400,000 3,400,000 3,400,000                    
Amortized Cost [10],[11] $ (2,300,000)                              
Fair Value [3],[10],[11] $ (2,400,000)                              
Investment, Identifier [Axis]: Saluda Grade Alternative Mortgage Trust 2022-BC2, Term Loan, Asset Based Finance, Real Estate                                
Variable rate [7],[10],[11] 7.30% 7.30% 7.30% 7.30% 7.30% 7.30%                    
Principal amount [10],[11],[15] $ 34,500,000                              
Amortized Cost [10],[11] (34,500,000)                              
Fair Value [3],[10],[11] $ (34,400,000)                              
Investment, Identifier [Axis]: SavATree LLC, Senior Secured Loans—First Lien, Consumer Services -1                                
Variable rate [16],[35]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[35]               $ 1,900,000                
Amortized Cost [35]               (1,800,000)                
Fair Value [4],[35]               $ (1,900,000)                
Investment, Identifier [Axis]: SavATree LLC, Senior Secured Loans—First Lien, Consumer Services -2                                
Variable rate [16],[17]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 7,600,000                
Amortized Cost [17]               (7,600,000)                
Fair Value [4],[17]               $ (7,600,000)                
Investment, Identifier [Axis]: SavATree LLC, Senior Secured Loans—First Lien, Consumer Services -3                                
Variable rate [16],[17]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 6,300,000                
Amortized Cost [17]               (6,300,000)                
Fair Value [4],[17]               $ (6,300,000)                
Investment, Identifier [Axis]: SavATree LLC, Senior Secured Loans - First Lien, Consumer Services 1                                
Variable rate [7],[10] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 3,200,000                              
Amortized Cost [10] (3,100,000)                              
Fair Value [3],[10] $ (3,100,000)                              
Investment, Identifier [Axis]: SavATree LLC, Senior Secured Loans - First Lien, Consumer Services 2                                
Variable rate [7],[22] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 6,300,000                              
Amortized Cost [22] (6,300,000)                              
Fair Value [3],[22] $ (6,300,000)                              
Investment, Identifier [Axis]: SavATree LLC, Senior Secured Loans - First Lien, Consumer Services 3                                
Variable rate [7],[22] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 6,300,000                              
Amortized Cost [22] (6,300,000)                              
Fair Value [3],[22] $ (6,300,000)                              
Investment, Identifier [Axis]: Sealane Trade Finance L+375                                
Variable rate               3.75% 3.75% 3.75% 3.75% 3.75% 3.75%      
Investment, Identifier [Axis]: Sealane Trade Finance L+963                                
Variable rate               9.63% 9.63% 9.63% 9.63% 9.63% 9.63%      
Investment, Identifier [Axis]: Sequa Corp                                
Variable rate [16],[35],[40],[43]               10.75% 10.75% 10.75% 10.75% 10.75% 10.75%      
Interest rate, paid in kind [16],[35],[40],[43]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Base Rate Floor [35],[40],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[40],[43]               $ 5,900,000                
Amortized Cost [35],[40],[43]               (5,700,000)                
Fair Value [4],[35],[40],[43]               $ (5,900,000)                
Investment, Identifier [Axis]: Sequa Corp | Maximum                                
Interest rate, paid in kind [16],[35],[40],[43]               6.80% 6.80% 6.80% 6.80% 6.80% 6.80%      
Investment, Identifier [Axis]: Sequa Corp, Fair Value Hierarchy, Senior Secured Loans—First Lien, Capital Goods -1                                
Variable rate [16],[35],[40],[43]               6.75% 6.75% 6.75% 6.75% 6.75% 6.75%      
Interest rate, paid in kind [16],[35],[40],[43]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Base Rate Floor [35],[40],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[40],[43]               $ 16,000,000.0                
Amortized Cost [35],[40],[43]               (15,400,000)                
Fair Value [4],[35],[40],[43]               $ (16,200,000)                
Investment, Identifier [Axis]: Sequa Corp, Fair Value Hierarchy, Senior Secured Loans—First Lien, Capital Goods -1 | Maximum                                
Interest rate, paid in kind [16],[35],[40],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Investment, Identifier [Axis]: Sequa Corp, Fair Value Hierarchy, Senior Secured Loans—First Lien, Capital Goods -2                                
Variable rate [16],[35]               9.00% 9.00% 9.00% 9.00% 9.00% 9.00%      
Interest rate, paid in kind [16],[35]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 16,400,000                
Amortized Cost [35]               (16,000,000.0)                
Fair Value [4],[35]               $ (17,200,000)                
Investment, Identifier [Axis]: Sequa Corp, Fair Value Hierarchy, Senior Secured Loans—First Lien, Capital Goods -2 | Maximum                                
Interest rate, paid in kind [16],[35]               9.50% 9.50% 9.50% 9.50% 9.50% 9.50%      
Investment, Identifier [Axis]: Sequa Corp, Senior Secured Loans - First Lien, Capital Goods                                
Variable rate [7],[10],[41],[44] 6.75% 6.75% 6.75% 6.75% 6.75% 6.75%                    
Interest rate, paid in kind [7],[10],[41],[44] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Base Rate Floor [7],[10],[41],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[41],[44] $ 8,300,000                              
Amortized Cost [10],[41],[44] (8,100,000)                              
Fair Value [3],[10],[41],[44] $ (8,300,000)                              
Investment, Identifier [Axis]: Sequa Corp, Senior Secured Loans - First Lien, Capital Goods | Maximum                                
Interest rate, paid in kind [7],[10],[41],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Investment, Identifier [Axis]: Sequel Youth & Family Services LLC, Senior Secured Loans—First Lien, Health Care Equipment & Services -1                                
Variable rate [16],[25],[28],[35]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00%      
Base Rate Floor [25],[28],[35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[25],[28],[35]               $ 170,000,000.0                
Amortized Cost [25],[28],[35]               (106,400,000)                
Fair Value [4],[25],[28],[35]               $ (51,600,000)                
Investment, Identifier [Axis]: Sequel Youth & Family Services LLC, Senior Secured Loans—First Lien, Health Care Equipment & Services -2                                
Variable rate [16],[25],[28],[35]               7.00% 7.00% 7.00% 7.00% 7.00% 7.00%      
Base Rate Floor [25],[28],[35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[25],[28],[35]               $ 29,200,000                
Amortized Cost [25],[28],[35]               (19,300,000)                
Fair Value [4],[25],[28],[35]               $ (8,900,000)                
Investment, Identifier [Axis]: Sequel Youth & Family Services LLC, Senior Secured Loans—First Lien, Health Care Equipment & Services -3                                
Variable rate [16],[35]               7.00% 7.00% 7.00% 7.00% 7.00% 7.00%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 36,000,000.0                
Amortized Cost [35]               (36,000,000.0)                
Fair Value [4],[35]               $ (36,000,000.0)                
Investment, Identifier [Axis]: Sequel Youth & Family Services LLC, Senior Secured Loans—First Lien, Health Care Equipment & Services -4                                
Variable rate [16],[17]               7.00% 7.00% 7.00% 7.00% 7.00% 7.00%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 6,000,000.0                
Amortized Cost [17]               (6,000,000.0)                
Fair Value [4],[17]               $ (6,000,000.0)                
Investment, Identifier [Axis]: Sequel Youth & Family Services LLC, Class R Common Stock, Equity/Other, Health Care Equipment & Services                                
Number of Shares | shares [33],[55] 900,000 900,000 900,000 900,000 900,000 900,000                    
Amortized Cost [33],[55] $ 0                              
Fair Value [3],[33],[55] $ 0                              
Investment, Identifier [Axis]: Sequel Youth & Family Services LLC, Senior Secured Loans - First Lien, Health Care Equipment & Services                                
Investment interest rate [7],[10],[30],[33] 3.00% 3.00% 3.00% 3.00% 3.00% 3.00%                    
Principal amount [10],[15],[30],[33] $ 57,200,000                              
Amortized Cost [10],[30],[33] (8,900,000)                              
Fair Value [3],[10],[30],[33] $ (1,600,000)                              
Investment, Identifier [Axis]: SitusAMC Holdings Corp                                
Variable rate [16],[19],[20],[35]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [19],[20],[35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[19],[20],[35]               $ 95,400,000                
Amortized Cost [19],[20],[35]               (94,500,000)                
Fair Value [4],[19],[20],[35]               $ (94,400,000)                
Investment, Identifier [Axis]: SitusAMC Holdings Corp, Senior Secured Loans - First Lien, Real Estate                                
Variable rate [7],[10],[13],[14] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[10],[13],[14] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[13],[14],[15] $ 55,300,000                              
Amortized Cost [10],[13],[14] (54,800,000)                              
Fair Value [3],[10],[13],[14] $ (53,500,000)                              
Investment, Identifier [Axis]: Solera LLC                                
Variable rate [16],[35],[40]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00%      
Base Rate Floor [35],[40]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[40]               $ 312,400,000                
Amortized Cost [35],[40]               (295,800,000)                
Fair Value [4],[35],[40]               $ (317,600,000)                
Investment, Identifier [Axis]: Solera LLC, Senior Secured Loans -Second Lien, Software & Services                                
Variable rate [7],[10],[41] 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%                    
Base Rate Floor [7],[10],[41] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[41] $ 312,400,000                              
Amortized Cost [10],[41] (296,900,000)                              
Fair Value [3],[10],[41] $ (307,700,000)                              
Investment, Identifier [Axis]: Sorenson Communications LLC                                
Variable rate [16],[19],[35],[40],[42],[45],[47]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [19],[35],[40],[42],[45],[47]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[19],[35],[40],[42],[45],[47]               $ 59,900,000                
Amortized Cost [19],[35],[40],[42],[45],[47]               (56,900,000)                
Fair Value [4],[19],[35],[40],[42],[45],[47]               $ (60,100,000)                
Investment, Identifier [Axis]: Sorenson Communications LLC, Common Stock                                
Number of Shares | shares [28],[35],[45],[56],[57]               89,959 89,959 89,959 89,959 89,959 89,959      
Amortized Cost [28],[35],[45],[56],[57]               $ (42,500,000)                
Fair Value [4],[28],[35],[45],[56],[57]               $ (67,500,000)                
Investment, Identifier [Axis]: Sorenson Communications LLC, Common Stock, Equity/Other, Telecommunication Services                                
Number of Shares | shares [8],[9],[10],[33] 42,731 42,731 42,731 42,731 42,731 42,731                    
Amortized Cost [8],[9],[10],[33] $ (7,100,000)                              
Fair Value [3],[8],[9],[10],[33] $ (2,900,000)                              
Investment, Identifier [Axis]: Sorenson Communications LLC, Senior Secured Loans - First Lien, Telecommunication Services                                
Variable rate [7],[13],[23],[24],[41] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[13],[23],[24],[41] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [13],[15],[23],[24],[41] $ 34,700,000                              
Amortized Cost [13],[23],[24],[41] (32,700,000)                              
Fair Value [3],[13],[23],[24],[41] (33,300,000)                              
Investment, Identifier [Axis]: Sorenson Communications LLC, Subordinated Debt, Telecommunication Services 1                                
Principal amount [8],[9],[10],[15],[33] 9,700,000                              
Amortized Cost [8],[9],[10],[33] (8,900,000)                              
Fair Value [3],[8],[9],[10],[33] (9,300,000)                              
Investment, Identifier [Axis]: Sorenson Communications LLC, Subordinated Debt, Telecommunication Services 2                                
Principal amount [8],[9],[10],[15],[33] 39,500,000                              
Amortized Cost [8],[9],[10],[33] (32,000,000.0)                              
Fair Value [3],[8],[9],[10],[33] $ (32,900,000)                              
Investment, Identifier [Axis]: Sorenson Communications LLC, Trade Claim, Equity/Other, Telecommunication Services                                
Number of Shares | shares [8],[9],[10],[33] 987,959 987,959 987,959 987,959 987,959 987,959                    
Amortized Cost [8],[9],[10],[33] $ (1,000,000.0)                              
Fair Value [3],[8],[9],[10],[33] $ (1,000,000.0)                              
Investment, Identifier [Axis]: Sound United LLC, Common Stock                                
Number of Shares | shares [34],[35]               12,857,143 12,857,143 12,857,143 12,857,143 12,857,143 12,857,143      
Amortized Cost [34],[35]               $ (17,300,000)                
Fair Value [4],[34],[35]               $ (77,500,000)                
Investment, Identifier [Axis]: Sound United LLC, Common Stock, Equity/Other, Consumer Durables & Apparel                                
Number of Shares | shares [10] 532,768 532,768 532,768 532,768 532,768 532,768                    
Amortized Cost [10] $ (700,000)                              
Fair Value [3],[10] $ (7,000,000.0)                              
Investment, Identifier [Axis]: Source Code LLC, Senior Secured Loans - First Lien, Software & Services 1                                
Variable rate [7],[13],[14],[24] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                    
Base Rate Floor [7],[13],[14],[24] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [13],[14],[15],[24] $ 52,900,000                              
Amortized Cost [13],[14],[24] (52,000,000.0)                              
Fair Value [3],[13],[14],[24] $ (51,800,000)                              
Investment, Identifier [Axis]: Source Code LLC, Senior Secured Loans - First Lien, Software & Services 2                                
Variable rate [7],[22] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 15,300,000                              
Amortized Cost [22] (15,000,000.0)                              
Fair Value [3],[22] $ (15,000,000.0)                              
Investment, Identifier [Axis]: Source Code LLC, Senior Secured Loans—First Lien, Software & Services -1                                
Variable rate [16],[19],[20],[42]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50%      
Base Rate Floor [19],[20],[42]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[19],[20],[42]               $ 53,300,000                
Amortized Cost [19],[20],[42]               (52,300,000)                
Fair Value [4],[19],[20],[42]               $ (52,200,000)                
Investment, Identifier [Axis]: Source Code LLC, Senior Secured Loans—First Lien, Software & Services -2                                
Variable rate [16],[17]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 15,300,000                
Amortized Cost [17]               (15,000,000.0)                
Fair Value [4],[17]               $ (15,000,000.0)                
Investment, Identifier [Axis]: Spins LLC, FSK CLO, Senior Secured Loans—First Lien, Software & Services -1                                
Variable rate [16],[35],[37],[42],[43]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [35],[37],[42],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[37],[42],[43]               $ 60,700,000                
Amortized Cost [35],[37],[42],[43]               (57,300,000)                
Fair Value [4],[35],[37],[42],[43]               $ (61,300,000)                
Investment, Identifier [Axis]: Spins LLC, FSK CLO, Senior Secured Loans—First Lien, Software & Services -2                                
Variable rate [16],[17]               5.50% 5.50% 5.50% 5.50% 5.50% 5.50%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 7,900,000                
Amortized Cost [17]               (7,900,000)                
Fair Value [4],[17]               $ (7,900,000)                
Investment, Identifier [Axis]: Spins LLC, Senior Secured Loans - First Lien, Software & Services 1                                
Variable rate [7],[10],[24],[39],[44] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[10],[24],[39],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[24],[39],[44] $ 68,400,000                              
Amortized Cost [10],[24],[39],[44] (65,400,000)                              
Fair Value [3],[10],[24],[39],[44] $ (69,000,000.0)                              
Investment, Identifier [Axis]: Spins LLC, Senior Secured Loans - First Lien, Software & Services 2                                
Variable rate [7],[22] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 16,500,000                              
Amortized Cost [22] (16,500,000)                              
Fair Value [3],[22] $ (16,600,000)                              
Investment, Identifier [Axis]: Spins LLC, Senior Secured Loans - First Lien, Software & Services 3                                
Variable rate [7],[22] 5.50% 5.50% 5.50% 5.50% 5.50% 5.50%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 7,900,000                              
Amortized Cost [22] (7,900,000)                              
Fair Value [3],[22] $ (7,900,000)                              
Investment, Identifier [Axis]: Staples Canada                                
Variable rate [16],[29],[35]               7.00% 7.00% 7.00% 7.00% 7.00% 7.00%      
Base Rate Floor [29],[35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[29],[35]               $ 35,800,000                
Amortized Cost [29],[35]               (28,000,000.0)                
Fair Value [4],[29],[35]               $ (29,100,000)                
Investment, Identifier [Axis]: Staples Canada, Senior Secured Loans - First Lien, Retailing                                
Variable rate [7],[10],[11] 7.00% 7.00% 7.00% 7.00% 7.00% 7.00%                    
Base Rate Floor [7],[10],[11] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[11],[15] $ 31,800,000                              
Amortized Cost [10],[11] (24,900,000)                              
Fair Value [3],[10],[11] $ (23,600,000)                              
Investment, Identifier [Axis]: Star Mountain Diversified Credit Income Fund III, LP, Private Equity                                
Number of Shares | shares [29],[58]               23,500,000 23,500,000 23,500,000 23,500,000 23,500,000 23,500,000      
Amortized Cost [29],[58]               $ (23,500,000)                
Fair Value [4],[29],[58]               $ (24,300,000)                
Investment, Identifier [Axis]: Star Mountain Diversified Credit Income Fund III, LP, Private Equity, Asset Based Finance, Diversified Financials                                
Number of Shares | shares [11],[15],[59] 23,500,000 23,500,000 23,500,000 23,500,000 23,500,000 23,500,000                    
Amortized Cost [11],[59] $ (23,500,000)                              
Fair Value [3],[11],[59] $ (23,900,000)                              
Investment, Identifier [Axis]: Stuart Weitzman Inc, Common Stock                                
Number of Shares | shares [28],[35]               5,451 5,451 5,451 5,451 5,451 5,451      
Amortized Cost [28],[35]               $ 0                
Fair Value [4],[28],[35]               $ 0                
Investment, Identifier [Axis]: Stuart Weitzman Inc, Common Stock, Equity/Other, Consumer Durables & Apparel                                
Number of Shares | shares [10],[33] 5,451 5,451 5,451 5,451 5,451 5,451                    
Amortized Cost [10],[33] $ 0                              
Fair Value [3],[10],[33] $ 0                              
Investment, Identifier [Axis]: Summit Interconnect Inc, Senior Secured Loans—First Lien, Capital Goods-1                                
Variable rate [16],[19],[20],[35],[42],[47]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [19],[20],[35],[42],[47]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[19],[20],[35],[42],[47]               $ 107,900,000                
Amortized Cost [19],[20],[35],[42],[47]               (106,800,000)                
Fair Value [4],[19],[20],[35],[42],[47]               $ (106,900,000)                
Investment, Identifier [Axis]: Summit Interconnect Inc, Senior Secured Loans—First Lien, Capital Goods-2                                
Variable rate [16],[17]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 48,700,000                
Amortized Cost [17]               (48,700,000)                
Fair Value [4],[17]               $ (48,200,000)                
Investment, Identifier [Axis]: Summit Interconnect Inc, Senior Secured Loans - First Lien, Capital Goods 1                                
Variable rate [7],[10],[13],[14],[23],[24],[44] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[10],[13],[14],[23],[24],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[13],[14],[15],[23],[24],[44] $ 97,500,000                              
Amortized Cost [10],[13],[14],[23],[24],[44] (96,600,000)                              
Fair Value [3],[10],[13],[14],[23],[24],[44] $ (93,100,000)                              
Investment, Identifier [Axis]: Summit Interconnect Inc, Senior Secured Loans - First Lien, Capital Goods 2                                
Variable rate [7],[10] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 39,300,000                              
Amortized Cost [10] (39,300,000)                              
Fair Value [3],[10] $ (37,500,000)                              
Investment, Identifier [Axis]: Summit Interconnect Inc, Senior Secured Loans - First Lien, Capital Goods 3                                
Variable rate [7],[22] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 9,400,000                              
Amortized Cost [22] (9,400,000)                              
Fair Value [3],[22] $ (9,000,000.0)                              
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc                                
Variable rate [16]               4.00% 4.00% 4.00% 4.00% 4.00% 4.00%      
Interest rate, paid in kind [16]               2.80% 2.80% 2.80% 2.80% 2.80% 2.80%      
Base Rate Floor [25],[28],[35],[45]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[25],[28],[35],[45]               $ 14,600,000                
Amortized Cost [25],[28],[35],[45]               (13,700,000)                
Fair Value [4],[25],[28],[35],[45]               $ (8,300,000)                
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc | Maximum                                
Interest rate, paid in kind [16]               2.80% 2.80% 2.80% 2.80% 2.80% 2.80%      
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Senior Secured Loans, First Lien                                
Variable rate [16],[35],[45]               3.75% 3.75% 3.75% 3.75% 3.75% 3.75%      
Interest rate, paid in kind [16],[35],[45]               3.80% 3.80% 3.80% 3.80% 3.80% 3.80%      
Base Rate Floor [35],[45]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[45]               $ 5,800,000                
Amortized Cost [35],[45]               (5,700,000)                
Fair Value [4],[35],[45]               $ (6,000,000.0)                
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Senior Secured Loans, First Lien | Maximum                                
Interest rate, paid in kind [16],[35],[45]               3.80% 3.80% 3.80% 3.80% 3.80% 3.80%      
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Common Stock                                
Number of Shares | shares [28],[35]               262,516 262,516 262,516 262,516 262,516 262,516      
Amortized Cost [28],[35]               $ (6,900,000)                
Fair Value [4],[28],[35]               $ 0                
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Common Stock, Equity/Other, Software & Services                                
Number of Shares | shares [9],[10],[33],[39],[46] 262,516 262,516 262,516 262,516 262,516 262,516                    
Amortized Cost [9],[10],[33],[39],[46] $ (6,900,000)                              
Fair Value [3],[9],[10],[33],[39],[46] $ 0                              
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Senior Secured Loans - First Lien, Software & Services 1                                
Variable rate [7],[10],[46] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Interest rate, paid in kind [7],[10],[46] 8.50% 8.50% 8.50% 8.50% 8.50% 8.50%                    
Base Rate Floor [7],[10],[46] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount [10],[15],[46] $ 4,500,000                              
Amortized Cost [10],[46] (4,500,000)                              
Fair Value [3],[10],[46] $ (4,500,000)                              
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Senior Secured Loans - First Lien, Software & Services 1 | Maximum                                
Interest rate, paid in kind [7],[10],[46] 8.50% 8.50% 8.50% 8.50% 8.50% 8.50%                    
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Senior Secured Loans - First Lien, Software & Services 2                                
Variable rate [7],[10],[30],[33],[46] 3.75% 3.75% 3.75% 3.75% 3.75% 3.75%                    
Interest rate, paid in kind [7],[10],[30],[33],[46] 3.80% 3.80% 3.80% 3.80% 3.80% 3.80%                    
Base Rate Floor [7],[10],[30],[33],[46] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[30],[33],[46] $ 6,000,000.0                              
Amortized Cost [10],[30],[33],[46] (5,800,000)                              
Fair Value [3],[10],[30],[33],[46] $ (500,000)                              
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Senior Secured Loans - First Lien, Software & Services 3                                
Variable rate [7],[22],[46] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Interest rate, paid in kind [7],[22],[46] 8.50% 8.50% 8.50% 8.50% 8.50% 8.50%                    
Base Rate Floor [7],[22],[46] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount [15],[22],[46] $ 1,700,000                              
Amortized Cost [22],[46] (1,700,000)                              
Fair Value [3],[22],[46] $ (1,700,000)                              
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Senior Secured Loans -Second Lien, Software & Services                                
Variable rate [7],[10],[30],[33],[46] 4.00% 4.00% 4.00% 4.00% 4.00% 4.00%                    
Interest rate, paid in kind [7],[10],[30],[33],[46] 2.80% 2.80% 2.80% 2.80% 2.80% 2.80%                    
Base Rate Floor [7],[10],[30],[33],[46] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount | € [10],[15],[30],[33],[46]       € 15.0                        
Amortized Cost [10],[30],[33],[46] $ (13,500,000)                              
Fair Value [3],[10],[30],[33],[46] $ 0                              
Investment, Identifier [Axis]: Sungard Availability Services Capital Inc, Senior Secured Loans -Second Lien, Software & Services | Maximum                                
Interest rate, paid in kind [7],[10],[30],[33],[46] 2.80% 2.80% 2.80% 2.80% 2.80% 2.80%                    
Investment, Identifier [Axis]: Sweeping Corp of America Inc, Senior Secured Loans - First Lien, Commercial & Professional Services 1                                
Variable rate [7],[10],[44] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[10],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[44] $ 72,400,000                              
Amortized Cost [10],[44] (70,300,000)                              
Fair Value [3],[10],[44] $ (72,400,000)                              
Investment, Identifier [Axis]: Sweeping Corp of America Inc, Senior Secured Loans - First Lien, Commercial & Professional Services 2                                
Variable rate [7],[22] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 5,700,000                              
Amortized Cost [22] (5,700,000)                              
Fair Value [3],[22] $ (5,700,000)                              
Investment, Identifier [Axis]: Sweeping Corp of America Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -1                                
Variable rate [16],[35],[43]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [35],[43]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[43]               $ 55,800,000                
Amortized Cost [35],[43]               (53,300,000)                
Fair Value [4],[35],[43]               $ (56,300,000)                
Investment, Identifier [Axis]: Sweeping Corp of America Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -2                                
Variable rate [16],[35]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35]               $ 1,800,000                
Amortized Cost [35]               (1,800,000)                
Fair Value [4],[35]               $ (1,800,000)                
Investment, Identifier [Axis]: Sweeping Corp of America Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -3                                
Variable rate [16],[17]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 17,200,000                
Amortized Cost [17]               (17,200,000)                
Fair Value [4],[17]               $ (17,300,000)                
Investment, Identifier [Axis]: Sweeping Corp of America Inc, Senior Secured Loans—First Lien, Commercial & Professional Services -4                                
Variable rate [16],[17]               5.75% 5.75% 5.75% 5.75% 5.75% 5.75%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 3,900,000                
Amortized Cost [17]               (3,900,000)                
Fair Value [4],[17]               $ (3,900,000)                
Investment, Identifier [Axis]: Swift Worldwide Resources Holdco Ltd, Common Stock                                
Number of Shares | shares [28],[35]               1,250,000 1,250,000 1,250,000 1,250,000 1,250,000 1,250,000      
Amortized Cost [28],[35]               $ (1,200,000)                
Fair Value [4],[28],[35]               $ (1,100,000)                
Investment, Identifier [Axis]: Swift Worldwide Resources Holdco Ltd, Common Stock, Equity/Other, Energy                                
Number of Shares | shares [10],[33] 1,250,000 1,250,000 1,250,000 1,250,000 1,250,000 1,250,000                    
Amortized Cost [10],[33] $ (1,200,000)                              
Fair Value [3],[10],[33] $ (800,000)                              
Investment, Identifier [Axis]: TIBCO Software Inc, Other Senior Debt, Software & Services                                
Variable rate [7],[10],[41] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                    
Principal amount [10],[15],[41] $ 1,000,000.0                              
Amortized Cost [10],[41] (800,000)                              
Fair Value [3],[10],[41] $ (800,000)                              
Investment, Identifier [Axis]: TIBCO Software Inc, Preferred Stock, Equity/Other, Software & Services                                
Interest rate, paid in kind [7],[10] 12.00% 12.00% 12.00% 12.00% 12.00% 12.00%                    
Base Rate Floor [7],[10] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                    
Number of Shares | shares [10] 133,186,150 133,186,150 133,186,150 133,186,150 133,186,150 133,186,150                    
Amortized Cost [10] $ (127,300,000)                              
Fair Value [3],[10] $ (127,300,000)                              
Investment, Identifier [Axis]: TIBCO Software Inc, Preferred Stock, Equity/Other, Software & Services | Maximum                                
Interest rate, paid in kind [7],[10] 12.00% 12.00% 12.00% 12.00% 12.00% 12.00%                    
Investment, Identifier [Axis]: TIBCO Software Inc, Senior Secured Loans - First Lien, Software & Services                                
Variable rate [7],[10],[38],[41] 4.50% 4.50% 4.50% 4.50% 4.50% 4.50%                    
Base Rate Floor [7],[10],[38],[41] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                    
Principal amount [10],[15],[38],[41] $ 39,900,000                              
Amortized Cost [10],[38],[41] (36,300,000)                              
Fair Value [3],[10],[38],[41] $ (35,900,000)                              
Investment, Identifier [Axis]: Tangoe LLC                                
Variable rate [16],[21],[35],[37],[43],[47]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50%      
Base Rate Floor [21],[35],[37],[43],[47]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[21],[35],[37],[43],[47]               $ 190,200,000                
Amortized Cost [21],[35],[37],[43],[47]               (171,500,000)                
Fair Value [4],[21],[35],[37],[43],[47]               $ (147,200,000)                
Investment, Identifier [Axis]: Tangoe LLC, Senior Secured Loans - First Lien, Software & Services 1                                
Variable rate [7],[10],[39],[44] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                    
Base Rate Floor [7],[10],[39],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[39],[44] $ 179,500,000                              
Amortized Cost [10],[39],[44] (164,400,000)                              
Fair Value [3],[10],[39],[44] $ (146,300,000)                              
Investment, Identifier [Axis]: Tangoe LLC, Senior Secured Loans - First Lien, Software & Services 2                                
Interest rate, paid in kind [7],[10],[39],[44] 12.50% 12.50% 12.50% 12.50% 12.50% 12.50%                    
Principal amount [10],[15],[39],[44] $ 2,000,000.0                              
Amortized Cost [10],[39],[44] (2,000,000.0)                              
Fair Value [3],[10],[39],[44] $ (1,500,000)                              
Investment, Identifier [Axis]: Tangoe LLC, Senior Secured Loans - First Lien, Software & Services 2 | Maximum                                
Interest rate, paid in kind [7],[10],[39],[44] 12.50% 12.50% 12.50% 12.50% 12.50% 12.50%                    
Investment, Identifier [Axis]: Tekfor HoldCo, Senior Secured Loans - First Lien, Automobiles & Components                                
Principal amount | € [10],[11],[15],[33],[36]       € 42.9                        
Amortized Cost [10],[11],[33],[36] $ (48,600,000)                              
Fair Value [3],[10],[11],[33],[36] $ (10,300,000)                              
Investment, Identifier [Axis]: ThermaSys Corp                                
Variable rate [16],[25],[28],[35],[45]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00%      
Base Rate Floor [25],[28],[35],[45]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[25],[28],[35],[45]               $ 8,500,000                
Amortized Cost [25],[28],[35],[45]               (8,300,000)                
Fair Value [4],[25],[28],[35],[45]               $ (3,500,000)                
Investment, Identifier [Axis]: ThermaSys Corp | Maximum                                
Variable rate [16],[25],[28],[35],[45]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00%      
Investment, Identifier [Axis]: ThermaSys Corp, Common Stock                                
Number of Shares | shares [28],[35],[45],[56]               17,383,026 17,383,026 17,383,026 17,383,026 17,383,026 17,383,026      
Amortized Cost [28],[35],[45],[56]               $ (10,200,000)                
Fair Value [4],[28],[35],[45],[56]               $ 0                
Investment, Identifier [Axis]: ThermaSys Corp, Common Stock, Equity/Other, Capital Goods                                
Number of Shares | shares [9],[10],[33],[46] 17,383,026 17,383,026 17,383,026 17,383,026 17,383,026 17,383,026                    
Amortized Cost [9],[10],[33],[46] $ (10,200,000)                              
Fair Value [3],[9],[10],[33],[46] $ 0                              
Investment, Identifier [Axis]: ThermaSys Corp, Preferred Stock                                
Number of Shares | shares [28],[35],[45]               1,529 1,529 1,529 1,529 1,529 1,529      
Amortized Cost [28],[35],[45]               $ (1,700,000)                
Fair Value [4],[28],[35],[45]               $ 0                
Investment, Identifier [Axis]: ThermaSys Corp, Preferred Stock, Equity/Other, Capital Goods                                
Number of Shares | shares [10],[33],[46] 1,529 1,529 1,529 1,529 1,529 1,529                    
Amortized Cost [10],[33],[46] $ (1,700,000)                              
Fair Value [3],[10],[33],[46] $ 0                              
Investment, Identifier [Axis]: ThermaSys Corp, Senior Secured Loans - First Lien, Capital Goods                                
Variable rate [7],[10],[30],[33],[46] 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%                    
Base Rate Floor [7],[10],[30],[33],[46] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[30],[33],[46] $ 9,300,000                              
Amortized Cost [10],[30],[33],[46] (8,300,000)                              
Fair Value [3],[10],[30],[33],[46] $ (5,700,000)                              
Investment, Identifier [Axis]: ThreeSixty Group, Senior Secured Loans - First Lien, Retailing 1                                
Variable rate [7],[10],[44] 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%                    
Interest rate, paid in kind [7],[10],[44] 2.50% 2.50% 2.50% 2.50% 2.50% 2.50%                    
Base Rate Floor [7],[10],[44] 1.50% 1.50% 1.50% 1.50% 1.50% 1.50%                    
Principal amount [10],[15],[44] $ 46,200,000                              
Amortized Cost [10],[44] (46,100,000)                              
Fair Value [3],[10],[44] $ (44,800,000)                              
Investment, Identifier [Axis]: ThreeSixty Group, Senior Secured Loans - First Lien, Retailing 1 | Maximum                                
Interest rate, paid in kind [7],[10],[44] 2.50% 2.50% 2.50% 2.50% 2.50% 2.50%                    
Investment, Identifier [Axis]: ThreeSixty Group, Senior Secured Loans - First Lien, Retailing 2                                
Variable rate [7],[10],[44] 5.00% 5.00% 5.00% 5.00% 5.00% 5.00%                    
Interest rate, paid in kind [7],[10],[44] 2.50% 2.50% 2.50% 2.50% 2.50% 2.50%                    
Base Rate Floor [7],[10],[44] 1.50% 1.50% 1.50% 1.50% 1.50% 1.50%                    
Principal amount [10],[15],[44] $ 45,900,000                              
Amortized Cost [10],[44] (45,900,000)                              
Fair Value [3],[10],[44] $ (44,600,000)                              
Investment, Identifier [Axis]: ThreeSixty Group, Senior Secured Loans - First Lien, Retailing 2 | Maximum                                
Interest rate, paid in kind [7],[10],[44] 2.50% 2.50% 2.50% 2.50% 2.50% 2.50%                    
Investment, Identifier [Axis]: ThreeSixty Group, Senior Secured Loans—First Lien, Retailing -1                                
Variable rate [16],[35],[43]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00%      
Interest rate, paid in kind [16],[35],[43]               2.50% 2.50% 2.50% 2.50% 2.50% 2.50%      
Base Rate Floor [35],[43]               1.50% 1.50% 1.50% 1.50% 1.50% 1.50%      
Principal amount [18],[35],[43]               $ 48,500,000                
Amortized Cost [35],[43]               (48,400,000)                
Fair Value [4],[35],[43]               $ (47,700,000)                
Investment, Identifier [Axis]: ThreeSixty Group, Senior Secured Loans—First Lien, Retailing -1 | Maximum                                
Interest rate, paid in kind [16],[35],[43]               2.50% 2.50% 2.50% 2.50% 2.50% 2.50%      
Investment, Identifier [Axis]: ThreeSixty Group, Senior Secured Loans—First Lien, Retailing -2                                
Variable rate [16],[35],[43]               5.00% 5.00% 5.00% 5.00% 5.00% 5.00%      
Interest rate, paid in kind [16],[35],[43]               2.50% 2.50% 2.50% 2.50% 2.50% 2.50%      
Base Rate Floor [35],[43]               1.50% 1.50% 1.50% 1.50% 1.50% 1.50%      
Principal amount [18],[35],[43]               $ 48,300,000                
Amortized Cost [35],[43]               (48,100,000)                
Fair Value [4],[35],[43]               $ (47,400,000)                
Investment, Identifier [Axis]: ThreeSixty Group, Senior Secured Loans—First Lien, Retailing -2 | Maximum                                
Interest rate, paid in kind [16],[35],[43]               2.50% 2.50% 2.50% 2.50% 2.50% 2.50%      
Investment, Identifier [Axis]: Time Manufacturing Co, Senior Secured Loans - First Lien, Capital Goods 1                                
Variable rate [7],[10] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 45,500,000                              
Amortized Cost [10] (44,600,000)                              
Fair Value [3],[10] $ (43,000,000.0)                              
Investment, Identifier [Axis]: Time Manufacturing Co, Senior Secured Loans - First Lien, Capital Goods 2                                
Variable rate [7],[10] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 5,700,000                              
Amortized Cost [10] (5,700,000)                              
Fair Value [3],[10] $ (5,400,000)                              
Investment, Identifier [Axis]: Time Manufacturing Co, Senior Secured Loans - First Lien, Capital Goods 3                                
Variable rate [7],[10] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 13,700,000                              
Amortized Cost [10] (14,500,000)                              
Fair Value [3],[10] $ (12,700,000)                              
Investment, Identifier [Axis]: Time Manufacturing Co, Senior Secured Loans - First Lien, Capital Goods 4                                
Variable rate [7],[22] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 16,400,000                              
Amortized Cost [22] (16,400,000)                              
Fair Value [3],[22] $ (15,500,000)                              
Investment, Identifier [Axis]: Time Manufacturing Co, Senior Secured Loans—First Lien, Capital Goods - 5                                
Variable rate [16],[17]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount | € [17],[18]                     € 15.0          
Amortized Cost [17]               $ (17,000,000.0)                
Fair Value [4],[17]               $ (17,200,000)                
Investment, Identifier [Axis]: Time Manufacturing Co, Senior Secured Loans—First Lien, Capital Goods -1                                
Variable rate [16],[35]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50%      
Base Rate Floor [35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[35]               $ 45,800,000                
Amortized Cost [35]               (44,800,000)                
Fair Value [4],[35]               $ (44,800,000)                
Investment, Identifier [Axis]: Time Manufacturing Co, Senior Secured Loans—First Lien, Capital Goods -2                                
Variable rate [16],[35]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50%      
Base Rate Floor [35]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [18],[35]               $ 5,300,000                
Amortized Cost [35]               (5,300,000)                
Fair Value [4],[35]               $ (5,300,000)                
Investment, Identifier [Axis]: Time Manufacturing Co, Senior Secured Loans—First Lien, Capital Goods -3                                
Variable rate [16],[17]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 13,700,000                
Amortized Cost [17]               (13,700,000)                
Fair Value [4],[17]               $ (13,600,000)                
Investment, Identifier [Axis]: Time Manufacturing Co, Senior Secured Loans—First Lien, Capital Goods -4                                
Variable rate [16],[17]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50%      
Base Rate Floor [17]               0.80% 0.80% 0.80% 0.80% 0.80% 0.80%      
Principal amount [17],[18]               $ 4,500,000                
Amortized Cost [17]               (4,500,000)                
Fair Value [4],[17]               $ (4,500,000)                
Investment, Identifier [Axis]: Toorak Capital Funding LLC, Membership Interest                                
Number of Shares | shares [28],[29],[34],[35]               1,723,140 1,723,140 1,723,140 1,723,140 1,723,140 1,723,140      
Amortized Cost [28],[29],[34],[35]               $ (1,900,000)                
Fair Value [4],[28],[29],[34],[35]               $ (1,700,000)                
Investment, Identifier [Axis]: Toorak Capital Partners LLC, Private Equity                                
Number of Shares | shares [34],[35]               158,139,270 158,139,270 158,139,270 158,139,270 158,139,270 158,139,270      
Amortized Cost [34],[35]               $ (158,100,000)                
Fair Value [4],[34],[35]               $ (199,300,000)                
Investment, Identifier [Axis]: Toorak Capital Partners LLC, Structured Mezzanine, Asset Based Finance, Real Estate - 1                                
Interest rate, paid in kind [16],[34],[35]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50%      
Principal amount [18],[34],[35]               $ 22,000,000.0                
Amortized Cost [34],[35]               (22,000,000.0)                
Fair Value [4],[34],[35]               $ (22,000,000.0)                
Investment, Identifier [Axis]: Toorak Capital Partners LLC, Structured Mezzanine, Asset Based Finance, Real Estate - 1 | Maximum                                
Interest rate, paid in kind [16],[34],[35]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50%      
Investment, Identifier [Axis]: Toorak Capital Partners LLC, Structured Mezzanine, Asset Based Finance, Real Estate - 2                                
Interest rate, paid in kind [16],[17],[34]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50%      
Principal amount [17],[18],[34]               $ 8,000,000.0                
Amortized Cost [17],[34]               (8,000,000.0)                
Fair Value [4],[17],[34]               $ (8,000,000.0)                
Investment, Identifier [Axis]: Toorak Capital Partners LLC, Structured Mezzanine, Asset Based Finance, Real Estate - 2 | Maximum                                
Interest rate, paid in kind [16],[17],[34]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50%      
Investment, Identifier [Axis]: Transaction Services Group Ltd, Senior Secured Loans - First Lien, Software & Services 1                                
Variable rate [7],[10],[11] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                    
Base Rate Floor [7],[10],[11] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount [10],[11],[15] $ 48,300,000                              
Amortized Cost [10],[11] (34,000,000.0)                              
Fair Value [3],[10],[11] $ (30,900,000)                              
Investment, Identifier [Axis]: Transaction Services Group Ltd, Senior Secured Loans - First Lien, Software & Services 2                                
Variable rate [7],[10],[11] 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%                    
Base Rate Floor [7],[10],[11] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount [10],[11],[15] $ 126,200,000                              
Amortized Cost [10],[11] (122,700,000)                              
Fair Value [3],[10],[11] $ (125,500,000)                              
Investment, Identifier [Axis]: Transaction Services Group Ltd, Senior Secured Loans—First Lien, Software & Services -1                                
Variable rate [16],[29],[35]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50%      
Base Rate Floor [29],[35]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Principal amount | £ [18],[29],[35]                       £ 13.9        
Amortized Cost [29],[35]               $ (17,700,000)                
Fair Value [4],[29],[35]               $ (18,300,000)                
Investment, Identifier [Axis]: Transaction Services Group Ltd, Senior Secured Loans—First Lien, Software & Services -2                                
Variable rate [16],[29],[35]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50%      
Base Rate Floor [29],[35]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Principal amount [18],[29],[35]                         $ 80.3      
Amortized Cost [29],[35]               $ (55,700,000)                
Fair Value [4],[29],[35]               $ (57,000,000.0)                
Investment, Identifier [Axis]: Transaction Services Group Ltd, Senior Secured Loans—First Lien, Software & Services -3                                
Variable rate [16],[29],[35]               6.50% 6.50% 6.50% 6.50% 6.50% 6.50%      
Base Rate Floor [29],[35]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Principal amount [18],[29],[35]               $ 126,200,000                
Amortized Cost [29],[35]               (122,200,000)                
Fair Value [4],[29],[35]               $ (123,100,000)                
Investment, Identifier [Axis]: TruckPro LLC                                
Investment interest rate [16],[35],[40]               11.00% 11.00% 11.00% 11.00% 11.00% 11.00%      
Principal amount [18],[35],[40]               $ 9,200,000                
Amortized Cost [35],[40]               (9,200,000)                
Fair Value [4],[35],[40]               $ (10,000,000.0)                
Investment, Identifier [Axis]: TruckPro LLC, Other Senior Debt, Capital Goods                                
Variable rate [7],[10],[41] 11.00% 11.00% 11.00% 11.00% 11.00% 11.00%                    
Principal amount [10],[15],[41] $ 9,200,000                              
Amortized Cost [10],[41] (9,200,000)                              
Fair Value [3],[10],[41] $ (9,000,000.0)                              
Investment, Identifier [Axis]: Ultra Electronics Holdings PLC, Private Equity, Equity/Other, Capital Goods                                
Number of Shares | shares [10],[11],[33] 7,141,708 7,141,708 7,141,708 7,141,708 7,141,708 7,141,708                    
Amortized Cost [10],[11],[33] $ (8,800,000)                              
Fair Value [3],[10],[11],[33] $ (7,500,000)                              
Investment, Identifier [Axis]: Ultra Electronics Holdings PLC, Senior Secured Loans - First Lien, Capital Goods 1                                
Variable rate [7],[10],[11],[41] 3.75% 3.75% 3.75% 3.75% 3.75% 3.75%                    
Base Rate Floor [7],[10],[11],[41] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                    
Principal amount [10],[11],[15],[41] $ 1,800,000                              
Amortized Cost [10],[11],[41] (1,800,000)                              
Fair Value [3],[10],[11],[41] $ (1,700,000)                              
Investment, Identifier [Axis]: Ultra Electronics Holdings PLC, Senior Secured Loans - First Lien, Capital Goods 2                                
Variable rate [7],[10],[11],[41] 3.75% 3.75% 3.75% 3.75% 3.75% 3.75%                    
Base Rate Floor [7],[10],[11],[41] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount [10],[11],[15],[41] $ 1,400,000                              
Amortized Cost [10],[11],[41] (1,600,000)                              
Fair Value [3],[10],[11],[41] $ (1,200,000)                              
Investment, Identifier [Axis]: Ultra Electronics Holdings PLC, Subordinated Debt, Capital Goods 1                                
Variable rate [7],[10],[11] 7.25% 7.25% 7.25% 7.25% 7.25% 7.25%                    
Base Rate Floor [7],[10],[11] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                    
Principal amount [10],[11],[15] $ 62,400,000                              
Amortized Cost [10],[11] (60,600,000)                              
Fair Value [3],[10],[11] $ (58,000,000.0)                              
Investment, Identifier [Axis]: Ultra Electronics Holdings PLC, Subordinated Debt, Capital Goods 2                                
Variable rate [7],[10],[11] 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%                    
Interest rate, paid in kind [7],[10],[11] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Base Rate Floor [7],[10],[11] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                    
Principal amount [10],[11],[15] $ 58,200,000                              
Amortized Cost [10],[11] (56,500,000)                              
Fair Value [3],[10],[11] $ (52,900,000)                              
Investment, Identifier [Axis]: Ultra Electronics Holdings PLC, Subordinated Debt, Capital Goods 2 | Maximum                                
Interest rate, paid in kind [7],[10],[11] 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%                    
Investment, Identifier [Axis]: Valeo Foods Group Ltd, Senior Secured Loans -Second Lien, Food, Beverage & Tobacco 1                                
Variable rate [7],[10],[11] 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%                    
Base Rate Floor [7],[10],[11] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount | € [10],[11],[15]       € 3.8                        
Amortized Cost [10],[11] $ (4,000,000.0)                              
Fair Value [3],[10],[11] $ (3,500,000)                              
Investment, Identifier [Axis]: Valeo Foods Group Ltd, Senior Secured Loans -Second Lien, Food, Beverage & Tobacco 2                                
Variable rate [7],[11],[22] 7.50% 7.50% 7.50% 7.50% 7.50% 7.50%                    
Base Rate Floor [7],[11],[22] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount [11],[15],[22] $ 2,300,000                              
Amortized Cost [11],[22] (3,100,000)                              
Fair Value [3],[11],[22] $ (3,000,000.0)                              
Investment, Identifier [Axis]: Valeo Foods Group Ltd, Senior Secured Loans—Second Lien, Food, Beverage & Tobacco -1                                
Variable rate [16],[29],[35]               8.00% 8.00% 8.00% 8.00% 8.00% 8.00%      
Base Rate Floor [29],[35]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Principal amount | £ [18],[29],[35]                       £ 9.3        
Amortized Cost [29],[35]               $ (12,300,000)                
Fair Value [4],[29],[35]               $ (12,200,000)                
Investment, Identifier [Axis]: Valeo Foods Group Ltd, Senior Secured Loans—Second Lien, Food, Beverage & Tobacco -2                                
Variable rate [16],[17],[29]               7.50% 7.50% 7.50% 7.50% 7.50% 7.50%      
Base Rate Floor [17],[29]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Principal amount | € [17],[18],[29]                     € 6.2          
Amortized Cost [17],[29]               $ (7,200,000)                
Fair Value [4],[17],[29]               $ (6,800,000)                
Investment, Identifier [Axis]: Vantage Specialty Chemicals Inc                                
Variable rate [16],[35],[40]               8.25% 8.25% 8.25% 8.25% 8.25% 8.25%      
Base Rate Floor [35],[40]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[35],[40]               $ 800,000                
Amortized Cost [35],[40]               (700,000)                
Fair Value [4],[35],[40]               $ (700,000)                
Investment, Identifier [Axis]: Vantage Specialty Chemicals Inc, Senior Secured Loans -Second Lien, Materials                                
Variable rate [7],[10],[41] 8.25% 8.25% 8.25% 8.25% 8.25% 8.25%                    
Base Rate Floor [7],[10],[41] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount | € [10],[15],[41]       € 0.8                        
Amortized Cost [10],[41] $ (700,000)                              
Fair Value [3],[10],[41] $ (700,000)                              
Investment, Identifier [Axis]: Versatile Processing Group Inc, Class A - 2 Units                                
Number of Shares | shares [28],[56]               3,637,500 3,637,500 3,637,500 3,637,500 3,637,500 3,637,500      
Amortized Cost [28],[56]               $ (3,600,000)                
Fair Value [4],[28],[56]               $ 0                
Investment, Identifier [Axis]: Versatile Processing Group Inc, Class A - 2 Units, Equity/Other, Materials                                
Number of Shares | shares [9],[33] 3,637,500 3,637,500 3,637,500 3,637,500 3,637,500 3,637,500                    
Amortized Cost [9],[33] $ (3,600,000)                              
Fair Value [3],[9],[33] $ 0                              
Investment, Identifier [Axis]: Version1 Software Ltd, Senior Secured Loans - First Lien, Software & Services 1                                
Variable rate [7],[10],[11] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Interest rate, paid in kind [7],[10],[11] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Base Rate Floor [7],[10],[11] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount | € [10],[11],[15]       € 2.5                        
Amortized Cost [10],[11] $ (2,400,000)                              
Fair Value [3],[10],[11] $ (2,400,000)                              
Investment, Identifier [Axis]: Version1 Software Ltd, Senior Secured Loans - First Lien, Software & Services 1 | Maximum                                
Interest rate, paid in kind [7],[10],[11] 1.70% 1.70% 1.70% 1.70% 1.70% 1.70%                    
Investment, Identifier [Axis]: Version1 Software Ltd, Senior Secured Loans - First Lien, Software & Services 2                                
Variable rate [7],[10],[11] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Interest rate, paid in kind [7],[10],[11] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Base Rate Floor [7],[10],[11] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount [10],[11],[15] $ 4,000,000.0                              
Amortized Cost [10],[11] (4,700,000)                              
Fair Value [3],[10],[11] $ (4,400,000)                              
Investment, Identifier [Axis]: Version1 Software Ltd, Senior Secured Loans - First Lien, Software & Services 2 | Maximum                                
Interest rate, paid in kind [7],[10],[11] 1.70% 1.70% 1.70% 1.70% 1.70% 1.70%                    
Investment, Identifier [Axis]: Version1 Software Ltd, Senior Secured Loans - First Lien, Software & Services 3                                
Variable rate [7],[11],[22] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Interest rate, paid in kind [7],[11],[22] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Base Rate Floor [7],[11],[22] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount [11],[15],[22]           $ 2.4                    
Amortized Cost [11],[22] $ (2,400,000)                              
Fair Value [3],[11],[22] $ (2,300,000)                              
Investment, Identifier [Axis]: Version1 Software Ltd, Senior Secured Loans - First Lien, Software & Services 3 | Maximum                                
Interest rate, paid in kind [7],[11],[22] 1.70% 1.70% 1.70% 1.70% 1.70% 1.70%                    
Investment, Identifier [Axis]: VetCor Professional Practices LLC, Senior Secured Loans - First Lien, Health Care Equipment & Services 1                                
Variable rate [7],[10] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[10] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [10],[15] $ 75,200,000                              
Amortized Cost [10] (74,300,000)                              
Fair Value [3],[10] $ (74,500,000)                              
Investment, Identifier [Axis]: VetCor Professional Practices LLC, Senior Secured Loans - First Lien, Health Care Equipment & Services 2                                
Variable rate [7],[22] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount [15],[22] $ 18,000,000.0                              
Amortized Cost [22] (18,000,000.0)                              
Fair Value [3],[22] $ (17,800,000)                              
Investment, Identifier [Axis]: VetCor Professional Practices LLC, Senior Secured Loans - First Lien, Health Care Equipment & Services 3                                
Variable rate [7],[22] 5.75% 5.75% 5.75% 5.75% 5.75% 5.75%                    
Base Rate Floor [7],[22] 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%                    
Principal amount | € [15],[22]       € 6.7                        
Amortized Cost [22] $ (6,600,000)                              
Fair Value [3],[22] $ (6,700,000)                              
Investment, Identifier [Axis]: Warren Resources Inc 1                                
Variable rate [16],[34],[35]               9.00% 9.00% 9.00% 9.00% 9.00% 9.00%      
Investment interest rate [16],[34],[35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Interest rate, paid in kind [16],[34],[35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Base Rate Floor [34],[35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[34],[35]               $ 18,700,000                
Amortized Cost [34],[35]               (17,400,000)                
Fair Value [4],[34],[35]               $ (18,700,000)                
Investment, Identifier [Axis]: Warren Resources Inc, Common Stock                                
Number of Shares | shares [28],[34],[35]               3,483,788 3,483,788 3,483,788 3,483,788 3,483,788 3,483,788      
Amortized Cost [28],[34],[35]               $ (12,800,000)                
Fair Value [4],[28],[34],[35]               $ (20,400,000)                
Investment, Identifier [Axis]: Warren Resources Inc, Common Stock, Equity/Other, Energy                                
Number of Shares | shares [10],[33],[36] 3,483,788 3,483,788 3,483,788 3,483,788 3,483,788 3,483,788                    
Amortized Cost [10],[33],[36] $ (12,800,000)                              
Fair Value [3],[10],[33],[36] $ (24,800,000)                              
Investment, Identifier [Axis]: Warren Resources Inc, Senior Secured Loans - First Lien, Energy                                
Variable rate [7],[10],[36] 9.00% 9.00% 9.00% 9.00% 9.00% 9.00%                    
Interest rate, paid in kind [7],[10],[36] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Base Rate Floor [7],[10],[36] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15],[36] $ 18,600,000                              
Amortized Cost [10],[36] (17,600,000)                              
Fair Value [3],[10],[36] $ (18,600,000)                              
Investment, Identifier [Axis]: Warren Resources Inc, Senior Secured Loans - First Lien, Energy | Maximum                                
Interest rate, paid in kind [7],[10],[36] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Investment, Identifier [Axis]: Wealth Enhancement Group LLC, Senior Secured Loans - First Lien, Diversified Financials 1                                
Variable rate [7],[10],[11] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[10],[11] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[11],[15] $ 28,700,000                              
Amortized Cost [10],[11] (28,600,000)                              
Fair Value [3],[10],[11] $ (28,500,000)                              
Investment, Identifier [Axis]: Wealth Enhancement Group LLC, Senior Secured Loans - First Lien, Diversified Financials 2                                
Variable rate [7],[11],[22] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[11],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [11],[15],[22] $ 5,700,000                              
Amortized Cost [11],[22] (5,700,000)                              
Fair Value [3],[11],[22] $ (5,700,000)                              
Investment, Identifier [Axis]: Wealth Enhancement Group LLC, Senior Secured Loans - First Lien, Diversified Financials 3                                
Variable rate [7],[11],[22] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[11],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [11],[15],[22] $ 2,100,000                              
Amortized Cost [11],[22] (2,100,000)                              
Fair Value [3],[11],[22] $ (2,100,000)                              
Investment, Identifier [Axis]: Wealth Enhancement Group LLC, Senior Secured Loans—First Lien, Diversified Financials - 1                                
Variable rate [16],[29],[35]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [29],[35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[29],[35]               $ 15,100,000                
Amortized Cost [29],[35]               (15,000,000.0)                
Fair Value [4],[29],[35]               $ (15,100,000)                
Investment, Identifier [Axis]: Wealth Enhancement Group LLC, Senior Secured Loans—First Lien, Diversified Financials -2                                
Variable rate [16],[29],[35]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [29],[35]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[29],[35]               $ 700,000                
Amortized Cost [29],[35]               (700,000)                
Fair Value [4],[29],[35]               $ (700,000)                
Investment, Identifier [Axis]: Wealth Enhancement Group LLC, Senior Secured Loans—First Lien, Diversified Financials -3                                
Variable rate [16],[17],[29]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [17],[29]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18],[29]               $ 13,200,000                
Amortized Cost [17],[29]               (13,200,000)                
Fair Value [4],[17],[29]               $ (13,200,000)                
Investment, Identifier [Axis]: Wealth Enhancement Group LLC, Senior Secured Loans—First Lien, Diversified Financials -4                                
Variable rate [16],[17],[29]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [17],[29]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18],[29]               $ 1,000,000.0                
Amortized Cost [17],[29]               (1,000,000.0)                
Fair Value [4],[17],[29]               $ (1,000,000.0)                
Investment, Identifier [Axis]: Wittur Holding GmbH                                
Variable rate [16],[29],[35]               8.50% 8.50% 8.50% 8.50% 8.50% 8.50%      
Interest rate, paid in kind [16]               0.50% 0.50% 0.50% 0.50% 0.50% 0.50%      
Base Rate Floor [29],[35]               0.00% 0.00% 0.00% 0.00% 0.00% 0.00%      
Principal amount | € [18],[29],[35]                     € 112.8          
Amortized Cost [29],[35]               $ (120,900,000)                
Fair Value [4],[29],[35]               $ (120,900,000)                
Investment, Identifier [Axis]: Wittur Holding GmbH | Maximum                                
Interest rate, paid in kind [16],[29],[35]               0.50% 0.50% 0.50% 0.50% 0.50% 0.50%      
Investment, Identifier [Axis]: Wittur Holding GmbH, Senior Secured Loans -Second Lien, Capital Goods                                
Variable rate [7],[10],[11] 8.50% 8.50% 8.50% 8.50% 8.50% 8.50%                    
Interest rate, paid in kind [7],[10],[11] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                    
Base Rate Floor [7],[10],[11] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%                    
Principal amount [10],[11],[15] $ 113,100,000                              
Amortized Cost [10],[11] (122,000,000.0)                              
Fair Value [3],[10],[11] $ (82,700,000)                              
Investment, Identifier [Axis]: Wittur Holding GmbH, Senior Secured Loans -Second Lien, Capital Goods | Maximum                                
Interest rate, paid in kind [7],[10],[11] 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%                    
Investment, Identifier [Axis]: Woolpert Inc, Revolving Credit Facility, Senior Secured Loans—First Lien, Capital Goods -1                                
Variable rate [16],[19],[20],[35],[42],[43],[47]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [19],[20],[35],[42],[43],[47]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[19],[20],[35],[42],[43],[47]               $ 139,200,000                
Amortized Cost [19],[20],[35],[42],[43],[47]               (132,500,000)                
Fair Value [4],[19],[20],[35],[42],[43],[47]               $ (141,200,000)                
Investment, Identifier [Axis]: Woolpert Inc, Revolving Credit Facility, Senior Secured Loans—First Lien, Capital Goods -2                                
Variable rate [16],[17]               6.00% 6.00% 6.00% 6.00% 6.00% 6.00%      
Base Rate Floor [17]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [17],[18]               $ 25,600,000                
Amortized Cost [17]               (25,600,000)                
Fair Value [4],[17]               $ (25,900,000)                
Investment, Identifier [Axis]: Woolpert Inc, Senior Secured Loans - First Lien, Capital Goods 1                                
Variable rate [7],[10],[13],[14],[23],[24],[44] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[10],[13],[14],[23],[24],[44] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[13],[14],[15],[23],[24],[44] $ 159,900,000                              
Amortized Cost [10],[13],[14],[23],[24],[44] (153,800,000)                              
Fair Value [3],[10],[13],[14],[23],[24],[44] $ (154,200,000)                              
Investment, Identifier [Axis]: Woolpert Inc, Senior Secured Loans - First Lien, Capital Goods 2                                
Variable rate [7],[22] 6.00% 6.00% 6.00% 6.00% 6.00% 6.00%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 3,700,000                              
Amortized Cost [22] (3,700,000)                              
Fair Value [3],[22] $ (3,500,000)                              
Investment, Identifier [Axis]: Worldwise Inc, Class A Private Equity, Equity/Other, Household & Personal Products                                
Number of Shares | shares [10],[33] 32,109 32,109 32,109 32,109 32,109 32,109                    
Amortized Cost [10],[33] $ (1,600,000)                              
Fair Value [3],[10],[33] $ (1,600,000)                              
Investment, Identifier [Axis]: Worldwise Inc, Class B Private Equity, Equity/Other, Household & Personal Products                                
Number of Shares | shares [10],[33] 32,109 32,109 32,109 32,109 32,109 32,109                    
Amortized Cost [10],[33] $ (1,600,000)                              
Fair Value [3],[10],[33] $ (900,000)                              
Investment, Identifier [Axis]: Worldwise Inc, Senior Secured Loans - First Lien, Household & Personal Products 1                                
Variable rate [7],[10] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 26,600,000                              
Amortized Cost [10] (26,600,000)                              
Fair Value [3],[10] $ (25,200,000)                              
Investment, Identifier [Axis]: Worldwise Inc, Senior Secured Loans - First Lien, Household & Personal Products 2                                
Variable rate [7],[10] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 20,100,000                              
Amortized Cost [10] (19,900,000)                              
Fair Value [3],[10] $ (19,000,000.0)                              
Investment, Identifier [Axis]: Worldwise Inc, Senior Secured Loans - First Lien, Household & Personal Products 3                                
Variable rate [7],[10] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[10] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [10],[15] $ 6,800,000                              
Amortized Cost [10] (6,800,000)                              
Fair Value [3],[10] $ (6,500,000)                              
Investment, Identifier [Axis]: Worldwise Inc, Senior Secured Loans - First Lien, Household & Personal Products 4                                
Variable rate [7],[22] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 15,500,000                              
Amortized Cost [22] (15,500,000)                              
Fair Value [3],[22] $ (14,700,000)                              
Investment, Identifier [Axis]: Worldwise Inc, Senior Secured Loans - First Lien, Household & Personal Products 5                                
Variable rate [7],[22] 6.25% 6.25% 6.25% 6.25% 6.25% 6.25%                    
Base Rate Floor [7],[22] 1.00% 1.00% 1.00% 1.00% 1.00% 1.00%                    
Principal amount [15],[22] $ 7,400,000                              
Amortized Cost [22] (7,400,000)                              
Fair Value [3],[22] $ (7,000,000.0)                              
Investment, Identifier [Axis]: Zeta Interactive Holdings Corp, Common Stock 1                                
Number of Shares | shares [28],[34],[35]               3,610,212 3,610,212 3,610,212 3,610,212 3,610,212 3,610,212      
Amortized Cost [28],[34],[35]               $ (30,800,000)                
Fair Value [4],[28],[34],[35]               $ (30,400,000)                
Investment, Identifier [Axis]: Zeta Interactive Holdings Corp, Common Stock, Equity/Other, Software & Services                                
Number of Shares | shares [10],[33],[41] 2,208,577 2,208,577 2,208,577 2,208,577 2,208,577 2,208,577                    
Amortized Cost [10],[33],[41] $ (18,800,000)                              
Fair Value [3],[10],[33],[41] $ (14,600,000)                              
Investment, Identifier [Axis]: athenahealth Inc, Preferred Stock                                
Interest rate, paid in kind 10.80% 10.80% 10.80% 10.80% 10.80% 10.80%                    
Investment, Identifier [Axis]: athenahealth Inc, Preferred Stock | Maximum                                
Interest rate, paid in kind 10.80% 10.80% 10.80% 10.80% 10.80% 10.80%                    
Investment, Identifier [Axis]: athenahealth Inc, Preferred Stock, Equity/Other, Health Care Equipment & Services                                
Interest rate, paid in kind [7],[10],[46] 10.80% 10.80% 10.80% 10.80% 10.80% 10.80%                    
Number of Shares | shares [10],[46] 267,493 267,493 267,493 267,493 267,493 267,493                    
Amortized Cost [10],[46] $ (262,200,000)                              
Fair Value [3],[10],[46] $ (229,000,000.0)                              
Investment, Identifier [Axis]: athenahealth Inc, Preferred Stock, Equity/Other, Health Care Equipment & Services | Maximum                                
Interest rate, paid in kind [7],[10],[46] 10.80% 10.80% 10.80% 10.80% 10.80% 10.80%                    
Investment, Identifier [Axis]: hibu Inc                                
Variable rate [16],[19],[20],[35],[42],[43],[47]               6.25% 6.25% 6.25% 6.25% 6.25% 6.25%      
Base Rate Floor [19],[20],[35],[42],[43],[47]               1.00% 1.00% 1.00% 1.00% 1.00% 1.00%      
Principal amount [18],[19],[20],[35],[42],[43],[47]               $ 101,600,000                
Amortized Cost [19],[20],[35],[42],[43],[47]               (96,600,000)                
Fair Value [4],[19],[20],[35],[42],[43],[47]               $ (104,600,000)                
[1] Security may be an obligation of one or more entities affiliated with the named company
[2] Security may be an obligation of one or more entities affiliated with the named company.
[3] See Note 8 for additional information regarding the fair value of the Company's financial instruments
[4] Fair value determined by the Company’s board of directors (see Note 8).
[5] Listed investments may be treated as debt for GAAP or tax purposes.
[6] Listed investments may be treated as debt for GAAP or tax purposes.
[7] Certain variable rate securities in the Company’s portfolio bear interest at a rate determined by a publicly disclosed base rate plus a basis point spread. As of September 30, 2022, the three-month London Interbank Offered Rate, or LIBOR or “L”, was 3.75%, the Euro Interbank Offered Rate, or EURIBOR, was 1.17%, Canadian Dollar Offer Rate, or CDOR was 4.20%, the Australian Bank Bill Swap Bid Rate, or BBSY, or “B”, was 3.11%, the Reykjavik Interbank Offered Rate, or REIBOR or "R", was 6.30%, the Stockholm Interbank Offered Rate, or STIBOR or "SR", was 1.73%, the Sterling Interbank Offered Rate, or SONIA or "SA", was 2.19%, the Secured Overnight Financing Rate, or SOFR, was 3.59% and the U.S. Prime Lending Rate, or Prime, was 6.25%. PIK means paid-in-kind. PIK income accruals may be adjusted based on the fair value of the underlying investment. Variable rate securities with no floor rate use the respective benchmark rate in all cases.
[8] 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).
[9] 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).
[10] Security or portion thereof is pledged as collateral supporting the amounts outstanding under the Senior Secured Revolving Credit Facility (see Note 9).
[11] The investment, or 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, 2022, 76.5% of the Company’s total assets represented qualifying assets.
[12] Security or portion thereof held within CCT Tokyo Funding LLC and pledged as collateral supporting the amounts outstanding under the revolving credit facility with Sumitomo Mitsui Banking Corporation (see Note 9).
[13] Security or portion thereof held within Darby Creek LLC and is pledged as collateral supporting the amounts outstanding under a revolving credit facility with Deutsche Bank AG, New York Branch (see Note 9).
[14] Security or portion thereof held within Dunlap Funding LLC and is pledged as collateral supporting the amounts outstanding under a revolving credit facility with Deutsche Bank AG, New York Branch (see Note 9)
[15] Denominated in U.S dollars unless otherwise noted.
[16] Certain variable rate securities in the Company’s portfolio bear interest at a rate determined by a publicly disclosed base rate plus a basis point spread. As of December 31, 2021, the three-month London Interbank Offered Rate, or LIBOR or “L”, was 0.21%, the Euro Interbank Offered Rate, or EURIBOR, was (0.57)%, Canadian Dollar Offer Rate, or CDOR was 0.52%, the Bank Bill Swap Bid Rate, or BBSY was 0.12%, the Reykjavik Interbank Offered Rate, or REIBOR, was 2.65%, the Stockholm Interbank Offered Rate, or STIBOR, was (0.05)%, the Sterling Overnight Index Average, or SONIA, was .19%, the Secured Overnight Financing Rate, or SOFR, was .05%, and the U.S. Prime Lending Rate, or Prime, was 3.25%. PIK means paid-in-kind. PIK income accruals may be adjusted based on the fair value of the underlying investment.
[17] Security is an unfunded commitment. Reflects the stated spread at the time of commitment, but may not be the actual rate received upon funding.
[18] Denominated in U.S. dollars unless otherwise noted.
[19] Security or portion thereof held within Darby Creek LLC and is pledged as collateral supporting the amounts outstanding under a revolving credit facility with Deutsche Bank AG, New York Branch (see Note 9).
[20] Security or portion thereof held within Dunlap Funding LLC and is pledged as collateral supporting the amounts outstanding under a revolving credit facility with Deutsche Bank AG, New York Branch (see Note 9).
[21] Security or portion thereof was held within CCT Tokyo Funding LLC and was pledged as collateral supporting the amounts outstanding under the revolving credit facility with Sumitomo Mitsui Banking Corporation (see Note 9).
[22] Security is an unfunded commitment. Reflects the stated spread at the time of commitment, but may not be the actual rate received upon funding
[23] Security or portion thereof held within Ambler Funding LLC and is pledged as collateral supporting the amounts outstanding under the revolving credit facility with Ally Bank (see Note 9).
[24] Security or portion thereof held within Meadowbrook Run LLC and is pledged as collateral supporting the amounts outstanding under a revolving credit facility with Morgan Stanley Senior Funding, Inc. (see Note 9).
[25] Asset is on non-accrual status.
[26] Security held within IC Arches Investments LLC, a wholly-owned subsidiary of the Company.
[27] Security held within IC II Arches Investments, LLC, a wholly-owned subsidiary of the Company.
[28] Security is non-income producing.
[29] 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, 2021, 75.1% of the Company’s total assets represented qualifying assets.
[30] Asset is on non-accrual status.
[31] Security held within IC Arches Investments, LLC, a wholly-owned subsidiary of the Company.
[32] Security held within IC II Arches Investments, LLC, a wholly-owned subsidiary of the Company.
[33] Security is non-income producing.
[34] 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, 2021, the Company held investments in one portfolio company of which it is deemed to be an “affiliated person” and deemed to “control”. During the year ended December 31, 2021, the Company disposed of investments in one portfolio of which it was deemed to be an "affiliated person" and deemed to "control". The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person and deemed to control for the year ended December 31, 2021:
Portfolio CompanyFair Value at December 31, 2020
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)Fair Value at December 31, 2021
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend Income(3)
Senior Secured Loans—First Lien
 Advanced Lighting Technologies Inc $12.0 $4.1 $(15.9)$(4.6)$4.4 $— $— $— $— $— 
 Amtek Global Technology Pte Ltd 59.7 2.4 — — (27.3)34.8 1.1 1.4 — — 
 ATX Networks Corp — 46.8 — — — 46.8 1.3 — — — 
 HM Dunn Co Inc(4)
— 49.2 (7.1)(8.5)— 33.6 0.5 — — — 
 HM Dunn Co Inc(4)
— 14.0 (19.0)7.0 — 2.0 0.4 0.8 — — 
 One Call Care Management Inc — 9.7 (5.1)0.1 0.3 5.0 0.3 — 0.1 — 
 Production Resource Group LLC — 124.9 — — 8.4 133.3 5.4 3.8 — — 
 Production Resource Group LLC — 0.1 — — — 0.1 — — — — 
 Production Resource Group LLC — 60.6 (0.4)— 4.2 64.4 2.8 0.8 0.4 — 
 Production Resource Group LLC — 20.2 (0.1)— 0.1 20.2 0.4 — 0.1 — 
 Sound United LLC 14.9 — (15.0)— 0.1 — 0.4 — — — 
 Warren Resources Inc(4)
— 19.3 (2.0)0.1 1.3 18.7 1.3 0.1 — — 
Senior Secured Loans—Second Lien
Amtek Global Technology Pte Ltd0.1 (1.8)— (10.4)12.1 — (1.9)— — — 
Sound United LLC20.9 1.7 (22.6)— — — — 1.0 — — 
Other Senior Secured Debt
Advanced Lighting Technologies Inc— — (0.7)(22.9)23.6 — — — — — 
JW Aluminum Co(4)
— 75.5 — — 5.5 81.0 6.2 — — — 
One Call Care Management Inc(4)
— 43.5 (21.9)— 1.9 23.5 0.4 1.6 — — 
Subordinated Debt
ATX Networks Corp— 4.8 — — 2.3 7.1 — — — — 
Hilding Anders32.4 — — — 14.2 46.6 — — — — 
Hilding Anders— — — — — — — — — — 
Hilding Anders30.3 — — — (30.3)— — — — — 
Asset Based Finance
 801 5th Ave, Seattle, Structure Mezzanine 29.4 25.7 — — 2.1 57.2 3.6 1.3 — — 
 801 5th Ave, Seattle, Private Equity 10.3 9.6 — — 3.2 23.1 — — — — 
 Avida Holding AB, Common Stock 38.3 9.1 — — 4.9 52.3 — — — — 
 Kilter Finance, Preferred Stock 0.2 34.4 — — 1.5 36.1 1.3 1.2 — — 
 Kilter Finance, Private Equity 0.2 0.3 — — — 0.5 — — — — 
 KKR Rocket Loans Aggregator LLC, Partnership Interest — 1.4 — — — 1.4 — — — 0.1 
 My Community Homes SFR PropCo 2, Private Equity — 33.0 — — — 33.0 — — — — 
 Prime St LLC, Private Equity 3.9 4.6 — — 0.6 9.1 — — — — 
 Prime St LLC, Structured Mezzanine 22.8 27.6 — — 2.0 52.4 0.9 2.2 — — 
Portfolio CompanyFair Value at December 31, 2020
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)Fair Value at December 31, 2021
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend Income(3)
 Toorak Capital Funding LLC, Membership Interest $6.6 $1.3 $(4.9)$— $(1.3)$1.7 $— $— $— $— 
 Toorak Capital LLC, Membership Interest 235.9 2.3 (50.2)10.2 1.1 199.3 — — — 18.7 
 Toorak Capital Partners LLC, Structured Mezzanine— 73.0 (51.0)— — 22.0 0.2 — — — 
Credit Opportunities Partners JV, LLC
Credit Opportunities Partners JV, LLC712.5 586.4 — — 97.3 1,396.2 — — — 126.9 
Equity/Other
 Advanced Lighting Technologies Inc, Common Stock — — — (16.5)16.5 — — — — — 
 Advanced Lighting Technologies Inc, Warrant — — — (0.1)0.1 — — — — — 
 Amtek Global Technology Pte Ltd, Common Stock — — — — — — — — — — 
 Amtek Global Technology Pte Ltd, Ordinary Shares — — — — — — — — — — 
 Amtek Global Technology Pte Ltd, Trade Claim — — (1.4)0.4 1.0 — — — — — 
 Amtek Global Technology Pte Ltd, Private Equity — — — — — — — — — — 
 ATX Networks Corp, Common Stock — — — — — — — — — — 
 Hilding Anders, Class A Common Stock — — — — — — — — — — 
 Hilding Anders, Class B Common Stock — — — — — — — — — — 
 Hilding Anders, Class C Common Stock — — — — — — — — — — 
 Hilding Anders, Equity Options — — — — — — — — — — 
 HM Dunn Co Inc, Preferred Stock, Series A(4)
— 7.1 — — — 7.1 — — — — 
 HM Dunn Co Inc, Preferred Stock, Series B(4)
— — — — — — — — — — 
 JW Aluminum Co, Common Stock(4)
— — — — — — — — — — 
 JW Aluminum Co, Preferred Stock(4)
— 177.9 — — (55.3)122.6 0.4 20.9 — — 
 One Call Care Management Inc, Common Stock(4)
— 4.5 (2.2)(0.2)0.3 2.4 — — — — 
 One Call Care Management Inc, Preferred Stock A(4)
— 48.6 (23.7)(2.1)3.3 26.1 — — — — 
 One Call Care Management Inc, Preferred Stock B(4)
— 15.7 (8.8)1.1 1.2 9.2 — 0.8 — — 
 Production Resource Group LLC, Preferred Stock, Series A PIK — 18.1 — — (0.7)17.4 — — — — 
 Production Resource Group LLC, Preferred Stock, Series B PIK — — — — — — — — — — 
 Sound United LLC, Class A Units — — — (1.1)1.1 — — — — — 
 Sound United LLC, Common Stock 29.3 — — — 48.2 77.5 — — — 20.0 
 Sound United LLC, Series I Units — — — (0.5)0.5 — — — — — 
 Sound United LLC, Series II Units — — — (0.5)0.5 — — — — — 
 Warren Resources Inc, Common Stock — 12.8 — — 7.6 20.4 — — — — 
Total$1,259.7 $1,568.4 $(252.0)$(48.5)$156.5 $2,684.1 $25.0 $35.9 $0.6 $165.7 
______________
(1)Gross additions include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company into this category from a different category.
(2)Gross reductions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company out of this category into a different category.
(3)Interest, PIK, fee and dividend income presented for the full year ended December 31, 2021.
(4)The Company held this investment as of December 31, 2020 but it was not deemed to be an “control” of the portfolio company as of December 31, 2020. Transfers in or out have been presented at amortized cost.
[35] Security or portion thereof is pledged as collateral supporting the amounts outstanding under the Senior Secured Revolving Credit Facility (see Note 9).
[36] 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, 2022, the Company held investments in portfolio companies of which it is deemed to be an "affiliated person" and deemed to "control". During the nine months ended September 30, 2022, the Company disposed of investments in portfolio companies of which it was deemed to be an "affiliated person" and deemed to "control". The following table presents certain information with respect to investments in portfolio companies of which the Company was deemed to be an affiliated person and deemed to control as of September 30, 2022:
Portfolio Company
Fair Value at December 31, 2021
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)
Fair Value at September 30, 2022
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend and Other Income(3)
Senior Secured Loans—First Lien
Tekfor HoldCo (formerly Amtek Global Technology Pte Ltd)$34.8 $— $(16.9)$(3.2)$(4.4)$10.3 $— $— $— $— 
 ATX Networks Corp 46.8 0.4 (6.1)— — 41.1 2.0 1.0 — — 
 HM Dunn Co Inc33.6 2.0 — — — 35.6 — 2.0 — — 
 HM Dunn Co Inc2.0 — (2.0)— — — — — — — 
 One Call Care Management Inc 5.0 — — — (1.3)3.7 0.3 — — — 
 Production Resource Group LLC 133.3 15.1 — — 1.0 149.4 8.3 6.0 — — 
Portfolio Company
Fair Value at December 31, 2021
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)
Fair Value at September 30, 2022
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend and Other Income(3)
 Production Resource Group LLC $0.1 $— $— $— $— $0.1 $— $— $— $— 
 Production Resource Group LLC 64.4 2.8 (0.4)— 0.9 67.7 4.7 1.5 — — 
Production Resource Group LLC20.2 10.8 (0.2)— 0.3 31.1 — — — — 
Warren Resources Inc18.7 0.4 (0.2)— (0.3)18.6 1.8 0.1 — — 
Senior Secured Loans—Second Lien
Amtek Global Technology Pte Ltd— — — (39.1)39.1 — — — — — 
Other Senior Secured Debt
 JW Aluminum Co 81.0 0.1 — — (2.6)78.5 6.0 — — — 
 One Call Care Management Inc 23.5 1.2 — — (3.5)21.2 0.2 1.5 — — 
Subordinated Debt
ATX Networks Corp7.1 3.3 — — 6.2 16.6 2.2 — — — 
Hilding Anders46.6 — — — (46.6)— — — — — 
Hilding Anders— — — — — — — — — — 
Hilding Anders— — — — — — — — — — 
Asset Based Finance
 801 5th Ave, Seattle, Structure Mezzanine 57.2 0.2 — — (0.2)57.2 3.5 1.3 — — 
 801 5th Ave, Seattle, Private Equity 23.1 — — — (8.8)14.3 — — — — 
 Avenue One PropCo, Private Equity — 41.3 — — — 41.3 — — — — 
 Avida Holding AB, Common Stock 52.3 — — — (14.6)37.7 — — — — 
 Kilter Finance, Preferred Stock 36.1 39.8 — — — 75.9 4.8 1.9 — — 
 Kilter Finance, Private Equity 0.5 — — — — 0.5 — — — — 
 KKR Rocket Loans Aggregator LLC, Partnership Interest 1.4 1.6 — — — 3.0 — — — 0.8 
 My Community Homes PropCo 2, Private Equity 33.0 157.0 (105.0)— — 85.0 — — — — 
 Prime St LLC, Private Equity 9.1 — — — (9.1)— — — — — 
 Prime St LLC, Structured Mezzanine 52.4 0.1 — — (4.8)47.7 2.6 2.4 — — 
 Toorak Capital Funding LLC, Membership Interest 1.7 — (1.7)(0.2)0.2 — — — — 0.3 
 Roemanu LLC (FKA Toorak Capital Partners LLC), Private Equity 199.3 78.4 — — (18.0)259.7 — — — 13.7 
 Roemanu LLC (FKA Toorak Capital Partners LLC), Structured Mezzanine 22.0 32.0 (54.0)— — — — 0.6 — — 
Credit Opportunities Partners JV, LLC
Credit Opportunities Partners JV, LLC1,396.2 175.0 — — (105.1)1,466.1 — — — 153.4 
Equity/Other
 Amtek Global Technology Pte Ltd, Common Stock — — — — — — — — — — 
 Amtek Global Technology Pte Ltd, Ordinary Shares — — — — — — — — — — 
 Amtek Global Technology Pte Ltd, Private Equity — — — — — — — — — — 
 ATX Networks Corp, Common Stock — — — — — — — — — — 
 Hilding Anders, Class A Common Stock — — — — — — — — — — 
Portfolio Company
Fair Value at December 31, 2021
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)
Fair Value at September 30, 2022
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend and Other Income(3)
 Hilding Anders, Class B Common Stock $— $— $— $— $— $— $— $— $— $— 
 Hilding Anders, Class C Common Stock — — — — — — — — — — 
 Hilding Anders, Equity Options — — — — — — — — — — 
 HM Dunn Co Inc, Preferred Stock, Series A 7.1 — — — 3.8 10.9 — — — — 
 HM Dunn Co Inc, Preferred Stock, Series B — — — — — — — — — — 
 JW Aluminum Co, Common Stock — — — — 2.2 2.2 — — — — 
 JW Aluminum Co, Preferred Stock 122.6 17.7 — — (34.9)105.4 0.6 15.2 — — 
 One Call Care Management Inc, Common Stock 2.4 — — — (0.3)2.1 — — — — 
 One Call Care Management Inc, Preferred Stock A 26.1 — — — (3.6)22.5 — — — — 
 One Call Care Management Inc, Preferred Stock B 9.2 — — — (1.5)7.7 — 0.5 — — 
 PRG III LLC, Preferred Stock, Series A PIK17.4 — — — 46.0 63.4 — — — — 
 PRG III LLC, Preferred Stock, Series B PIK— — — — — — — — — — 
 Sound United LLC, Common Stock(4)
77.5 — (17.3)— (60.2)— — — — — 
 Warren Resources Inc, Common Stock 20.4 — — — 4.4 24.8 — — — — 
Total$2,684.1 $579.2 $(203.8)$(42.5)$(215.7)$2,801.3 $37.0 $34.0 $— $168.2 
______________
(1)Gross additions include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company into this category from a different category.
(2)Gross reductions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company out of this category into a different category.
(3)Interest, PIK, fee and dividend income presented for the full nine months ended September 30, 2022.
(4)The Company held this investment as of September 30, 2022 but it was not deemed to be an “control” of the portfolio company as of September 30, 2022. Transfers in or out have been presented at amortized cost.
[37] 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. (see Note 9).
[38] Position or portion thereof unsettled as of September 30, 2022.
[39] 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. (see Note 9).
[40] Security is classified as Level 1 or 2 in the Company's fair value hierarchy (see Note 8).
[41] Security is classified as Level 1 or Level 2 in the Company's fair value hierarchy (see Note 8).
[42] Security or portion thereof held within Meadowbrook Run LLC and is pledged as collateral supporting the amounts outstanding under a revolving credit facility with Morgan Stanley Senior Funding, Inc. (see Note 9).
[43] Security or portion thereof was held within FSK CLO as of December 31, 2021.
[44] Security or portion thereof held within FS KKR MM CLO 1 LLC (see Note 9).
[45] 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, 2021, the Company held investments in portfolio companies of which it is 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 was deemed to be an affiliated person for the year ended December 31, 2021:
Portfolio CompanyFair Value at December 31, 2020
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)Fair Value at December 31, 2021
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend Income(3)
Senior Secured Loans—First Lien
 Affordable Care Inc $ $— $— $— $— $— $— $— $0.3 $— 
 Affordable Care Inc — 115.5 (55.9)0.3 — 59.9 2.7 — 1.6 — 
 Belk Inc — 42.6 (2.4)— 9.0 49.2 3.1 0.9 — — 
 Belk Inc — 21.7 — — 0.2 21.9 1.6 — — — 
 Borden (New Dairy Opco) 7.6 10.6 (10.0)0.2 0.6 9.0 0.5 — — — 
 Borden (New Dairy Opco) 16.8 23.4 — — 1.8 42.0 2.7 — — — 
 Borden Dairy Co— — — 1.3 (1.3)— — — — — 
Portfolio CompanyFair Value at December 31, 2020
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)Fair Value at December 31, 2021
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend Income(3)
 Constellis Holdings LLC $— $14.0 $— $— $1.0 $15.0 $0.9 $— $— $— 
 Fairway Group Holdings Corp — 1.1 (0.7)0.6 (0.3)0.7 0.8 — — — 
 Fairway Group Holdings Corp — — — — — — — — — — 
 HM Dunn Co Inc(5)
0.3 — (0.6)— 0.3 — — — — — 
 HM Dunn Co Inc(5)
0.2 — (0.3)— 0.1 — — — — — 
 Micronics Filtration Holdings Inc 35.5 1.0 — — 14.5 51.0 — 1.0 — — 
 One Call Care Management Inc(5)
4.7 0.6 (4.9)— (0.4)— 0.2 — — — 
 Petroplex Acidizing Inc 4.5 — (0.2)— 5.4 9.7 — — — — 
 Sorenson Communications LLC(4)
— 61.8 (5.1)0.2 3.2 60.1 2.8 — — — 
 Sungard Availability Services Capital Inc(4)
— 5.7 — — 0.3 6.0 0.2 0.1 — — 
 ThermaSys Corp 3.9 0.4 — — (0.8)3.5 — 0.5 — — 
Senior Secured Loans—Second Lien
 Belk Inc — 4.2 — — 2.5 6.7 — — — — 
 Constellis Holdings LLC — 12.5 — — (0.5)12.0 0.6 0.4 — — 
 Fairway Group Holdings Corp — — — — — — — — — — 
 Sorenson Communications LLC — 22.0 (22.2)0.2 — — 0.4 0.9 — — 
 Sungard Availability Services Capital Inc — 13.6 0.1 — (5.4)8.3 0.7 0.2 — — 
Other Senior Secured Debt
JW Aluminum Co(5)
41.8 — (39.4)— (2.4)— — — — — 
Subordinated Debt
 Home Partners of America Inc — 3.5 (3.5)— — — 0.1 — — — 
Asset Based Finance
 Home Partners JV, Structured Mezzanine38.5 83.4 (36.3)— 4.8 90.4 0.6 7.3 — — 
 Home Partners JV, Private Equity — 5.4 — — 4.0 9.4 — — — — 
 Home Partners JV, Private Equity — — — (0.6)0.6 — — — — — 
 Home Partners JV, Common Stock 21.5 45.9 (22.9)7.7 28.4 80.6 — — — — 
 Home Partners JV 2, Structured Mezzanine— 3.4 — — 0.1 3.5 — 0.2 — — 
 Home Partners JV 2, Private Equity — 0.1 — — — 0.1 — — — — 
 Home Partners JV 2, Private Equity — 1.5 — — 0.1 1.6 — — — — 
 Jet Edge International LLC, Preferred Stock — 20.9 — — (4.1)16.8 0.5 — — — 
 Jet Edge International LLC, Warrant — — — — 4.5 4.5 — — — — 
 Jet Edge International LLC, Term Loan — 78.0 (2.1)— (0.3)75.6 2.4 0.5 — — 
 Orchard Marine Limited, Class B Common Stock — — — — — — — — — — 
 Orchard Marine Limited, Series A Preferred Stock 24.6 — — — 40.0 64.6 — — — — 
Equity/Other
 Affordable Care Inc, Common Stock — 48.1 — — 4.0 52.1 — 2.3 — — 
 ASG Technologies, Common Stock 42.7 — (79.4)56.0 (19.3)— — — — — 
 ASG Technologies, Warrants 3.5 — (10.2)3.7 3.0 — — — — — 
 Belk Inc, Common Stock — — — — — — — 0— — 
Portfolio CompanyFair Value at December 31, 2020
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)Fair Value at December 31, 2021
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend Income(3)
 Borden (New Dairy Opco), Common Stock $3.2 $5.2 $— $— $(0.7)$7.7 $— $— $— $— 
 Charlotte Russe Inc, Common Stock — — — (12.5)12.5 — — — — — 
 Constellis Holdings LLC, Private Equity — 10.3 — — (10.1)0.2 — — — — 
 Fairway Group Holdings Corp, Common Stock — — — — — — — — — — 
 Fronton BV, Common Stock 1.2 — — — 0.2 1.4 — — — — 
 HM Dunn Co Inc, Preferred Stock, Series A(5)
— — — — — — — — — — 
 HM Dunn Co Inc, Preferred Stock, Series B(5)
— — — — — — — — — — 
 Home Partners of America Inc, Common Stock 130.5 — (214.3)130.7 (46.9)— — — — — 
 Home Partners of America Inc, Warrant 2.1 — (4.4)4.1 (1.8)— — — — — 
 JW Aluminum Co, Common Stock(5)
— — — — — — — — — — 
 JW Aluminum Co, Preferred Stock(5)
93.7 — (107.3)— 13.6 — — 4.2 — — 
 Micronics Filtration Holdings Inc, Common Stock — — — — — — — — — — 
 Micronics Filtration Holdings Inc, Preferred Stock, Series A — — — — 0.1 0.1 — — — — 
 Micronics Filtration Holdings Inc, Preferred Stock, Series B — — — — 0.4 0.4 — — — — 
 Micronics Filtration Holdings Inc, Preferred Stock, Series B PIK — — — — 11.9 11.9 — — — — 
 Micronics Filtration Holdings Inc, Preferred Stock, Series C PIK — — — — 6.2 6.2 — — — — 
 One Call Care Management Inc, Common Stock(5)
2.4 — (3.0)— 0.6 — — — — — 
 One Call Care Management Inc, Preferred Stock A(5)
25.5 — (32.3)— 6.8 — — — — — 
 One Call Care Management Inc, Preferred Stock B(5)
10.6 — (9.8)— (0.8)— — — — — 
 Petroplex Acidizing Inc, Preferred Stock A — 0.4 — — (0.4)— — — — 0.4 
 Petroplex Acidizing Inc, Warrant — — — — — — — — — — 
 Proserv Acquisition LLC, Class A Common Units 9.0 — (0.1)— (8.8)0.1 — — — — 
 Proserv Acquisition LLC, Class A Preferred Units 9.5 — — — (0.2)9.3 — — — — 
 Sorenson Communications LLC, Common Stock(4)
— 42.5 — — 25.0 67.5 — — — — 
 Sungard Availability Services Capital Inc, Common Stock(4)— 6.9 — — (6.9)— — — — — 
 ThermaSys Corp, Common Stock — — — — — — — — — — 
 ThermaSys Corp, Preferred Stock — — — — — — — — — — 
Total$533.8 $706.2 $(667.2)$191.9 $94.3 $859.0 $20.8 $18.5 $1.9 $0.4 
______________
(1)Gross additions include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company into this category from a different category.
(2)Gross reductions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company out of this category into a different category.
(3)Interest, PIK, fee and dividend income presented for the full year ended December 31, 2021.
(4)The Company held this investment as of December 31, 2020 but it was not deemed to be an “affiliated person” of the portfolio company as of December 31, 2020. Transfers in or out have been presented at amortized cost.
(5)The Company held this investment as of December 31, 2021 but it was deemed to "control" the portfolio company as of December 31, 2021. Transfers in or out have been presented at amortized cost.
[46] 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, 2022, the Company held investments in portfolio companies of which it is 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 was deemed to be an affiliated person as of September 30, 2022:
Portfolio Company
Fair Value at December 31, 2021
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)
Fair Value at September 30, 2022
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend and Other Income(3)
Senior Secured Loans—First Lien
Affordable Care Inc$— $— $— $— $— $— $— $— $— $— 
Affordable Care Inc59.9 10.0 (21.2)— (0.7)48.0 2.7 — 0.2 — 
athenahealth Inc— 6.8 (6.1)(0.7)— — 0.2 — 0.2 — 
Belk Inc49.2 4.5 (1.0)(0.2)(39.6)12.9 3.7 2.7 — — 
Belk Inc21.9 0.1 — — (2.4)19.6 1.5 — — — 
Borden (New Dairy Opco)9.0 — (9.0)0.6 (0.6)— 0.1 — 0.3 — 
Borden (New Dairy Opco)42.0 0.1 (42.0)1.7 (1.8)— 0.9 — 1.3 — 
Borden Dairy Co— — — (25.4)25.4 — — — — — 
Portfolio Company
Fair Value at December 31, 2021
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)
Fair Value at September 30, 2022
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend and Other Income(3)
Constellis Holdings LLC$15.0 $0.3 $— $— $(0.3)$15.0 $1.3 $— $— $— 
Fairway Group Holdings Corp0.7 — — (1.0)0.3 — — — — — 
Fairway Group Holdings Corp— — — — — — — — — — 
Micronics Filtration Holdings LLC51.0 5.7 (51.7)— (5.0)— 0.2 0.3 — — 
Petroplex Acidizing Inc9.7 — (16.7)(5.3)12.3 — — — — — 
Sorenson Communications LLC(4)
60.1 — (56.9)— (3.2)— — — — — 
Sungard Availability Services Capital Inc6.0 0.1 — — (5.6)0.5 — — — — 
Sungard Availability Services Capital Inc— 4.5 — — — 4.5 0.3 0.1 0.2 — 
ThermaSys Corp3.5 — — — 2.2 5.7 — — — — 
Senior Secured Loans—Second Lien
 Belk Inc 6.7 — — — (3.0)3.7 — — — — 
 Constellis Holdings LLC 12.0 0.2 — — 1.3 13.5 1.4 — — — 
 Fairway Group Holdings Corp — — — — — — — — — — 
 Sungard Availability Services Capital Inc 8.3 — (0.2)— (8.1)— — — — — 
Subordinated Debt
 athenahealth Inc — 5.5 (4.7)(0.8)— — 0.1 — — — 
Asset Based Finance
 Home Partners JV, Structured Mezzanine90.4 7.9 (98.1)4.6 (4.8)— 0.3 7.5 — — 
 Home Partners JV, Private Equity 9.4 — (11.8)6.4 (4.0)— — — — 0.7 
 Home Partners JV, Common Stock 80.6 — (101.0)53.4 (33.0)— — — — 4.3 
 Home Partners JV 2, Structured Mezzanine3.5 6.5 — 0.1 (0.1)10.0 — 0.4 — — 
 Home Partners JV 2, Private Equity 0.1 0.1 — — — 0.2 — — — — 
 Home Partners JV 2, Private Equity 1.6 2.9 — — 0.7 5.2 — — — — 
 Jet Edge International LLC, Preferred Stock 16.8 — (30.1)9.2 4.1 — 0.7 — — — 
 Jet Edge International LLC, Warrant 4.5 — (13.3)13.3 (4.5)— — — — 1.5 
 Jet Edge International LLC, Term Loan 75.6 — (75.9)— 0.3 — 9.9 1.9 2.7 — 
 Orchard Marine Limited, Class B Common Stock — — — (3.1)3.1 — — — — — 
 Orchard Marine Limited, Series A Preferred Stock 64.6 — (65.4)3.4 (2.6)— — — — — 
Equity/Other
 Affordable Care Inc, Preferred Stock 52.1 — — — (2.1)50.0 — 4.1 — — 
 athenahealth Inc, Preferred Stock — 311.3 (47.5)(1.6)(33.2)229.0 1.4 20.2 — — 
 Belk Inc, Common Stock — — — — — — — — — — 
 Borden (New Dairy Opco), Common Stock 7.7 — — — (2.8)4.9 — — — — 
 Constellis Holdings LLC, Private Equity 0.2 — — — 5.7 5.9 — — — — 
 Fairway Group Holdings Corp, Common Stock — — — — — — — — — — 
 Fronton BV, Common Stock 1.4 — — — (0.3)1.1 — — — — 
 Micronics Filtration Holdings Inc, Common Stock — — (0.1)(0.5)0.6 — — — — — 
 Micronics Filtration Holdings Inc, Preferred Stock, Series A 0.1 — — (0.6)0.5 — — — — — 
Portfolio Company
Fair Value at December 31, 2021
Gross Additions(1)
Gross Reductions(2)
Net Realized Gain (Loss)Net Change in Unrealized Appreciation (Depreciation)
Fair Value at September 30, 2022
Interest Income(3)
PIK Income(3)
Fee Income(3)
Dividend and Other Income(3)
 Micronics Filtration Holdings Inc, Preferred Stock, Series B $0.4 $— $(0.4)$0.2 $(0.2)$— $— $— $— $— 
 Micronics Filtration Holdings Inc, Preferred Stock, Series B PIK 11.9 — (11.9)11.9 (11.9)— — — — — 
 Micronics Filtration Holdings Inc, Preferred Stock, Series C PIK 6.2 — (6.2)6.2 (6.2)— — — — — 
 Petroplex Acidizing Inc, Preferred Stock A — — — (4.9)4.9 — — — — — 
 Petroplex Acidizing Inc, Warrant — — — — — — — — — — 
 Proserv Acquisition LLC, Class A Common Units 0.1 0.1 — — 0.3 0.5 — — — — 
 Proserv Acquisition LLC, Class A Preferred Units 9.3 — — — (0.3)9.0 — — — — 
 Sorenson Communications LLC, Common Stock(4)
67.5 — (65.4)22.9 (25.0)— — — — — 
 Sungard Availability Services Capital Inc, Common Stock — — — — — — — — — — 
 ThermaSys Corp, Common Stock — — — — — — — — — — 
 ThermaSys Corp, Preferred Stock — — — — — — — — — — 
Total$859.0 $366.6 $(736.6)$89.8 $(139.6)$439.2 $24.7 $37.2 $4.9 $6.5 
______________
(1)Gross additions include increases in the cost basis of investments resulting from new portfolio investments, PIK interest, the amortization of unearned income, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company into this category from a different category.
(2)Gross reductions include decreases in the cost basis of investments resulting from principal collections related to investment repayments or sales, the exchange of one or more existing securities for one or more new securities and the movement of an existing portfolio company out of this category into a different category.
(3)Interest, PIK, fee and dividend income presented for the full nine months ended September 30, 2022.
(4)The Company held this investment as of September 30, 2022 but it was not deemed to be an “affiliated person” of the portfolio company as of September 30, 2022. Transfers in or out have been presented at amortized cost.
[47] Security or portion thereof held within Ambler Funding LLC and is pledged as collateral supporting the amounts outstanding under the revolving credit facility with Ally Bank (see Note 9).
[48] Security or portion thereof was held within CCT Dublin Funding Limited
[49] Security or portion thereof held within CCT Dublin Funding Limited.
[50] Security held within CCT Holdings II, LLC, a wholly-owned subsidiary of the Company.
[51] Security held within CCT Holdings II, LLC, a wholly-owned subsidiary of the Company
[52] Security held within IC American Energy Investments, Inc., a wholly-owned subsidiary of the Company.
[53] Security held within IC American Energy Investments, Inc., a wholly-owned subsidiary of the Company.
[54] Security held within FSIC II Investments, Inc., a wholly-owned subsidiary of the Company.
[55] Security held within FSIC II Investments, Inc., a wholly-owned subsidiary of the Company.
[56] Security or portion thereof held within Race Street Funding LLC. Security is available as collateral supporting the amounts outstanding under the Senior Secured Revolving Credit Facility (see Note 9).
[57] 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).
[58] Security held within FSIC Investments, Inc., a wholly-owned subsidiary of the Company.
[59] Security held within FSIC Investments, Inc., a wholly-owned subsidiary of the Company.