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Investments - Narrative (Details)
€ in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2025
EUR (€)
Dec. 31, 2024
USD ($)
Dec. 31, 2024
EUR (€)
 [7],[8],[12],[18],[49]
Sep. 30, 2023
USD ($)
Sep. 30, 2021
USD ($)
Mar. 31, 2021
USD ($)
May 03, 2013
USD ($)
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost $ 3,097,390 [1] $ 3,097,390 [1]   $ 3,101,924 [2]          
Investments at fair value 3,000,696 [1] 3,000,696 [1]   3,091,024 [2]          
Investment, Identifier [Axis]: AAC Lender Holdings, LLC, Ordinary shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 0 [3],[4],[5] 0 [3],[4],[5]   0 [6],[7],[8]          
Investments at fair value 0 [3],[4],[5] 0 [3],[4],[5]   0 [6],[7],[8]          
Investment, Identifier [Axis]: AAH Topco, LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (37) (37)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 3,659 3,659              
Investment, Identifier [Axis]: AAH Topco, LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (37)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       3,659          
Investment, Identifier [Axis]: AAH Topco, LLC, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 22,490 [4],[13],[14] 22,490 [4],[13],[14]   22,583 [7],[15],[16]          
Investments at fair value 22,618 [4],[13],[14] 22,618 [4],[13],[14]   22,734 [7],[15],[16]          
Principal amount 22,618 [4],[10],[13],[14] 22,618 [4],[10],[13],[14]   22,733 [7],[12],[15],[16]          
Investment, Identifier [Axis]: AAH Topco, LLC, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 20,017 [4],[5],[17] 20,017 [4],[5],[17]   20,104 [7],[8],[18]          
Investments at fair value 20,113 [4],[5],[17] 20,113 [4],[5],[17]   20,218 [7],[8],[18]          
Principal amount 20,113 [4],[5],[10],[17] 20,113 [4],[5],[10],[17]   20,218 [7],[8],[12],[18]          
Investment, Identifier [Axis]: AAH Topco, LLC, First lien 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 9,504 [4],[19] 9,504 [4],[19]   9,545 [7],[20]          
Investments at fair value 9,550 [4],[19] 9,550 [4],[19]   9,599 [7],[20]          
Principal amount 9,550 [4],[10],[19] 9,550 [4],[10],[19]   9,599 [7],[12],[20]          
Investment, Identifier [Axis]: AAH Topco, LLC, First lien 4                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 7,297 [4],[19] 7,297 [4],[19]   7,327 [7],[20]          
Investments at fair value 7,338 [4],[19] 7,338 [4],[19]   7,375 [7],[20]          
Principal amount 7,338 [4],[10],[19] 7,338 [4],[10],[19]   7,375 [7],[12],[20]          
Investment, Identifier [Axis]: AAH Topco, LLC, Subordinated 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 16,527 [4],[5],[17] 16,527 [4],[5],[17]   15,598 [7],[8],[18]          
Investments at fair value 16,444 [4],[5],[17] 16,444 [4],[5],[17]   15,366 [7],[8],[18]          
Principal amount 16,655 [4],[5],[10],[17] 16,655 [4],[5],[10],[17]   15,733 [7],[8],[12],[18]          
Investment, Identifier [Axis]: AAH Topco, LLC, Subordinated 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 6,481 [4],[19] 6,481 [4],[19]   6,117 [7],[20]          
Investments at fair value 6,449 [4],[19] 6,449 [4],[19]   6,027 [7],[20]          
Principal amount 6,532 [4],[10],[19] 6,532 [4],[10],[19]   6,170 [7],[12],[20]          
Investment, Identifier [Axis]: ACI Group Holdings, Inc. First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9],[21] (18) (18)              
Investments at fair value [4],[5],[9],[21] (184) (184)              
Principal amount [4],[5],[9],[10],[21] 1,836 1,836              
Investment, Identifier [Axis]: ACI Group Holdings, Inc., First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       233          
Investments at fair value [7],[8],[11]       228          
Principal amount [7],[8],[11],[12]       235          
Investment, Identifier [Axis]: ACI Group Holdings, Inc., First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 513 513              
Investments at fair value [4],[5],[9] 466 466              
Principal amount [4],[5],[9],[10] 518 518              
Investment, Identifier [Axis]: ACI Group Holdings, Inc., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11],[22]       (21)          
Investments at fair value [7],[8],[11],[22]       (62)          
Principal amount [7],[8],[11],[12],[22]       2,118          
Investment, Identifier [Axis]: ACI Group Holdings, Inc., First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 22,158 [4],[13],[14] 22,158 [4],[13],[14]   21,782 [7],[15],[16]          
Investments at fair value 20,043 [4],[13],[14] 20,043 [4],[13],[14]   21,266 [7],[15],[16]          
Principal amount 22,271 [4],[10],[13],[14] 22,271 [4],[10],[13],[14]   21,910 [7],[12],[15],[16]          
Investment, Identifier [Axis]: ACI Group Holdings, Inc., First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 4,243 [4],[5],[17] 4,243 [4],[5],[17]   4,170 [7],[8],[18]          
Investments at fair value 3,847 [4],[5],[17] 3,847 [4],[5],[17]   4,082 [7],[8],[18]          
Principal amount 4,275 [4],[5],[10],[17] 4,275 [4],[5],[10],[17]   4,206 [7],[8],[12],[18]          
Investment, Identifier [Axis]: ACI Group Holdings, Inc., First lien 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 3,924 [4],[5],[17] 3,924 [4],[5],[17]   3,858 [7],[8],[18]          
Investments at fair value 3,553 [4],[5],[17] 3,553 [4],[5],[17]   3,769 [7],[8],[18]          
Principal amount 3,947 [4],[5],[10],[17] 3,947 [4],[5],[10],[17]   3,884 [7],[8],[12],[18]          
Investment, Identifier [Axis]: ACI Parent Inc., Preferred shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 19,542 [4],[5],[21] 19,542 [4],[5],[21]   18,444 [7],[8],[22]          
Investments at fair value 14,751 [4],[5],[21] 14,751 [4],[5],[21]   16,419 [7],[8],[22]          
Principal amount 19,666 19,666              
Investment, Identifier [Axis]: AI Altius US Bidco, Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 3,049 [4],[5],[17] 3,049 [4],[5],[17]   3,048 [7],[8],[18]          
Investments at fair value 3,062 [4],[5],[17] 3,062 [4],[5],[17]   3,062 [7],[8],[18]          
Principal amount 3,062 [4],[5],[10],[17] 3,062 [4],[5],[10],[17]   3,062 [7],[8],[12],[18]          
Investment, Identifier [Axis]: AI Altius US Bidco, Inc., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11]          
Investments at fair value 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11]          
Principal amount 3,077 [4],[5],[9],[10] 3,077 [4],[5],[9],[10]   3,077 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Adelaide Borrower, LLC First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 0 0              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 1,048 1,048              
Investment, Identifier [Axis]: Adelaide Borrower, LLC First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (7) (7)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 667 667              
Investment, Identifier [Axis]: Adelaide Borrower, LLC, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 4,659 [4],[5],[23] 4,659 [4],[5],[23]   4,656 [7],[8],[18],[24]          
Investments at fair value 4,698 [4],[5],[23] 4,698 [4],[5],[23]   4,698 [7],[8],[18],[24]          
Principal amount 4,698 [4],[5],[10],[23] 4,698 [4],[5],[10],[23]   4,698 [7],[8],[12],[18],[24]          
Investment, Identifier [Axis]: Adelaide Borrower, LLC, First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       0          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       1,048          
Investment, Identifier [Axis]: Adelaide Borrower, LLC, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (7)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       667          
Investment, Identifier [Axis]: Alegeus Technologies Holdings Corp. First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[17] 8,351 8,351              
Investments at fair value [4],[5],[17] 8,341 8,341              
Principal amount [4],[5],[10],[17] 8,446 8,446              
Investment, Identifier [Axis]: Alegeus Technologies Holdings Corp., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[18]       8,406          
Investments at fair value [7],[8],[18]       8,404          
Principal amount [7],[8],[12],[18]       8,510          
Investment, Identifier [Axis]: Ambrosia Holdco Corp., Class A-1 common units 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[14] 1,348 1,348              
Investments at fair value [4],[14] 781 781              
Investment, Identifier [Axis]: Ambrosia Holdco Corp., Class A-1 common units 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5] 1,300 1,300              
Investments at fair value [4],[5] 753 753              
Investment, Identifier [Axis]: Ambrosia Holdco Corp., Ordinary shares 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[16]       1,348          
Investments at fair value [7],[16]       1,348          
Investment, Identifier [Axis]: Ambrosia Holdco Corp., Ordinary shares 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8]       1,300          
Investments at fair value [7],[8]       1,300          
Investment, Identifier [Axis]: AmeriVet Partners Management, Inc., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (10)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       1,969          
Investment, Identifier [Axis]: AmeriVet Partners Management, Inc., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (10) (10)              
Investments at fair value [4],[5],[9] (23) (23)              
Principal amount [4],[5],[9],[10] 1,969 1,969              
Investment, Identifier [Axis]: AmeriVet Partners Management, Inc., First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 18,818 [4],[5],[17] 18,818 [4],[5],[17]   18,908 [7],[15],[16]          
Investments at fair value 18,646 [4],[5],[17] 18,646 [4],[5],[17]   18,964 [7],[15],[16]          
Principal amount 18,867 [4],[5],[10],[17] 18,867 [4],[5],[10],[17]   18,964 [7],[12],[15],[16]          
Investment, Identifier [Axis]: AmeriVet Partners Management, Inc., First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 5,235 [4],[13],[14] 5,235 [4],[13],[14]   5,259 [7],[15],[16]          
Investments at fair value 5,189 [4],[13],[14] 5,189 [4],[13],[14]   5,277 [7],[15],[16]          
Principal amount 5,250 [4],[10],[13],[14] 5,250 [4],[10],[13],[14]   5,277 [7],[12],[15],[16]          
Investment, Identifier [Axis]: AmeriVet Partners Management, Inc., First lien 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 687 [4],[5],[17] 687 [4],[5],[17]   690 [7],[8],[18]          
Investments at fair value 681 [4],[5],[17] 681 [4],[5],[17]   693 [7],[8],[18]          
Principal amount 690 [4],[5],[10],[17] 690 [4],[5],[10],[17]   693 [7],[8],[12],[18]          
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.), First Lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [3],[4],[5],[9] 0 0              
Investments at fair value [3],[4],[5],[9] 0 0              
Principal amount [3],[4],[5],[9],[10] 2,652 2,652              
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.), First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Principal amount 31,406 31,406              
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.), First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [6],[7],[8],[11]       0          
Investments at fair value [6],[7],[8],[11]       0          
Principal amount [6],[7],[8],[11],[12]       2,652          
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.), First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 29,842 [4],[14] 29,842 [4],[14]   29,843 [7],[16]          
Investments at fair value 17,999 [4],[14] 17,999 [4],[14]   17,999 [7],[16]          
Principal amount 29,879 [4],[10],[14] 29,879 [4],[10],[14]   29,879 [7],[12],[16]          
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.), First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 1,527 [4],[5] 1,527 [4],[5]   1,527 [7],[8]          
Investments at fair value 0 [4],[5] 0 [4],[5]   0 [7],[8]          
Principal amount 1,527 [4],[5],[10] 1,527 [4],[5],[10]   1,527 [7],[8],[12]          
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.), First lien, Non-accrual status                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Principal amount           $ 17,927 $ 13,479    
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.), Non-accrual status                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 31,369 31,369              
Investments at fair value 17,999 17,999              
Unearned interest income 1,345 2,638              
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.), Subordinated                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 0 [4],[5] 0 [4],[5]   0 [7],[8]          
Investments at fair value 0 [4],[5] 0 [4],[5]   0 [7],[8]          
Principal amount 5,230 [4],[5],[10] 5,230 [4],[5],[10]   5,230 [7],[8],[12]          
Investment, Identifier [Axis]: American Achievement Corporation (aka AAC Holding Corp.), Subordinated, Non-accrual status                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Principal amount               $ 5,230  
Investment, Identifier [Axis]: Anaplan, Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 10,494 [4],[5],[17] 10,494 [4],[5],[17]   10,548 [7],[8],[18]          
Investments at fair value 10,565 [4],[5],[17] 10,565 [4],[5],[17]   10,618 [7],[8],[18]          
Principal amount 10,565 [4],[5],[10],[17] 10,565 [4],[5],[10],[17]   10,618 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Ancora Acquisition LLC, Preferred shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 83 [4],[25] 83 [4],[25]   83 [7],[26]          
Investments at fair value 0 [4],[25] 0 [4],[25]   0 [7],[26]          
Investment, Identifier [Axis]: Associations, Inc., First Lien Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 1,260 1,260              
Investments at fair value [4],[5],[9] 1,260 1,260              
Principal amount [4],[5],[9],[10] 1,260 1,260              
Investment, Identifier [Axis]: Associations, Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[18]       49,409          
Investments at fair value [7],[8],[18]       49,430          
Principal amount [7],[8],[12],[18]       49,430          
Investment, Identifier [Axis]: Associations, Inc., First lien - Drawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       641          
Investments at fair value [7],[8],[11]       641          
Principal amount [7],[8],[11],[12]       641          
Investment, Identifier [Axis]: Associations, Inc., First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 0 0              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 377 377              
Investment, Identifier [Axis]: Associations, Inc., First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost (1) [4],[5],[9] (1) [4],[5],[9]   (2) [7],[8],[11]          
Investments at fair value 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11]          
Principal amount 2,573 [4],[5],[9],[10] 2,573 [4],[5],[9],[10]   3,200 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Associations, Inc., First lien - Drawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       1,538          
Investments at fair value [7],[8],[11]       1,539          
Principal amount [7],[8],[11],[12]       1,539          
Investment, Identifier [Axis]: Associations, Inc., First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (1)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       1,539          
Investment, Identifier [Axis]: Associations, Inc., First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[17] 49,161 49,161              
Investments at fair value [4],[5],[17] 49,181 49,181              
Principal amount [4],[5],[10],[17] 49,181 49,181              
Investment, Identifier [Axis]: Associations, Inc., First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 2,699 2,699              
Investments at fair value [4],[5],[9] 2,701 2,701              
Principal amount [4],[5],[9],[10] 2,701 2,701              
Investment, Identifier [Axis]: Associations, Inc., Subordinated 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 8,524 [4],[5] 8,524 [4],[5]   7,942 [7],[8]          
Investments at fair value 8,711 [4],[5] 8,711 [4],[5]   7,959 [7],[8]          
Principal amount 8,540 [4],[5],[10] 8,540 [4],[5],[10]   7,959 [7],[8],[12]          
Investment, Identifier [Axis]: Associations, Inc., Subordinated 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 3,255 [4],[5] 3,255 [4],[5]   3,033 [7],[8]          
Investments at fair value 3,342 [4],[5] 3,342 [4],[5]   3,039 [7],[8]          
Principal amount 3,261 [4],[5],[10] 3,261 [4],[5],[10]   3,039 [7],[8],[12]          
Investment, Identifier [Axis]: Aston FinCo S.a r.l. / Aston US Finco, LLC, Second lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[17],[23] 34,354 34,354              
Investments at fair value [4],[5],[17],[23] 34,459 34,459              
Principal amount [4],[5],[10],[17],[23] 34,459 34,459              
Investment, Identifier [Axis]: Aston FinCo S.a r.l. / Aston US Finco, LLC, Second lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[18],[24]       34,335          
Investments at fair value [7],[8],[18],[24]       34,459          
Principal amount [7],[8],[12],[18],[24]       34,459          
Investment, Identifier [Axis]: Atlas AU Bidco Pty Ltd First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9],[23] (6) (6)              
Investments at fair value [4],[5],[9],[23] 0 0              
Principal amount [4],[5],[9],[10],[23] 790 790              
Investment, Identifier [Axis]: Atlas AU Bidco Pty Ltd, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11],[24]       (5)          
Investments at fair value [7],[8],[11],[24]       0          
Principal amount [7],[8],[11],[12],[24]       320          
Investment, Identifier [Axis]: Atlas AU Bidco Pty Ltd, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 4,474 [4],[13],[14] 4,474 [4],[13],[14]   3,405 [7],[8],[18]          
Investments at fair value 4,474 [4],[13],[14] 4,474 [4],[13],[14]   3,445 [7],[8],[18]          
Principal amount 4,485 [4],[10],[13],[14] 4,485 [4],[10],[13],[14]   3,445 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Atlas AU Bidco Pty Ltd, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 3,391 [4],[5],[17] 3,391 [4],[5],[17]   1,330 [7],[8],[18]          
Investments at fair value 3,428 [4],[5],[17] 3,428 [4],[5],[17]   1,342 [7],[8],[18]          
Principal amount 3,428 [4],[5],[10],[17] 3,428 [4],[5],[10],[17]   1,342 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Atlas AU Bidco Pty Ltd, First lien 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[17] 1,324 1,324              
Investments at fair value [4],[5],[17] 1,335 1,335              
Principal amount [4],[5],[10],[17] 1,335 1,335              
Investment, Identifier [Axis]: Auctane Inc. (fka Stamps.com Inc.), First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[17] 35,958 35,958              
Investments at fair value [4],[5],[17] 35,446 35,446              
Principal amount [4],[5],[10],[17] 36,155 36,155              
Investment, Identifier [Axis]: Auctane Inc. (fka Stamps.com Inc.), First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[18]       21,492          
Investments at fair value [7],[8],[18]       21,138          
Principal amount [7],[8],[12],[18]       21,624          
Investment, Identifier [Axis]: Auctane Inc. (fka Stamps.com Inc.), First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[15],[16]       14,534          
Investments at fair value [7],[15],[16]       14,295          
Principal amount [7],[12],[15],[16]       14,624          
Investment, Identifier [Axis]: Avalara, Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[18]       17,045          
Investments at fair value [7],[8],[18]       17,198          
Principal amount [7],[8],[12],[18]       17,198          
Investment, Identifier [Axis]: Avalara, Inc., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (21)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       1,720          
Investment, Identifier [Axis]: Bach Special Limited (Bach Preference Limited), Preferred shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [8],[18],[24]       13,788          
Investments at fair value [8],[18],[24]       13,867          
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[18]       13,591          
Investments at fair value [7],[8],[18]       13,585          
Principal amount [7],[8],[12],[18]       13,687          
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP, First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11]          
Investments at fair value (13) [4],[5],[9] (13) [4],[5],[9]   (15) [7],[8],[11]          
Principal amount 2,500 [4],[5],[9],[10] 2,500 [4],[5],[9],[10]   2,065 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost (26) [4],[5],[9] (26) [4],[5],[9]   (22) [7],[8],[11]          
Investments at fair value (19) [4],[5],[9] (19) [4],[5],[9]   (22) [7],[8],[11]          
Principal amount 3,707 [4],[5],[9],[10] 3,707 [4],[5],[9],[10]   2,894 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[17] 15,576 15,576              
Investments at fair value [4],[5],[17] 15,681 15,681              
Principal amount [4],[5],[10],[17] 15,681 15,681              
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[13],[14] 5,754 5,754              
Investments at fair value [4],[13],[14] 5,753 5,753              
Principal amount [4],[10],[13],[14] 5,782 5,782              
Investment, Identifier [Axis]: Bamboo Health Holdings, LLC (f/k/a Appriss Health, LLC), First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 3,035 [4],[5],[17] 3,035 [4],[5],[17]   6,081 [7],[8],[18],[27]          
Investments at fair value 3,046 [4],[5],[17] 3,046 [4],[5],[17]   6,109 [7],[8],[18],[27]          
Principal amount 3,046 [4],[5],[10],[17] 3,046 [4],[5],[10],[17]   6,109 [7],[8],[12],[18],[27]          
Investment, Identifier [Axis]: Bamboo Health Holdings, LLC (f/k/a Appriss Health, LLC), First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost (4) [4],[5],[9] (4) [4],[5],[9]   (4) [7],[8],[11],[27]          
Investments at fair value 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11],[27]          
Principal amount 417 [4],[5],[9],[10] 417 [4],[5],[9],[10]   417 [7],[8],[11],[12],[27]          
Investment, Identifier [Axis]: Bamboo Health Intermediate Holdings (fka Appriss Health Intermediate Holdings, Inc.), Preferred shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[27]       3,432          
Investments at fair value [7],[8],[27]       3,371          
Investment, Identifier [Axis]: Beacon Pointe Harmony, LLC, First Lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 0 0              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 1,685 1,685              
Investment, Identifier [Axis]: Beacon Pointe Harmony, LLC, First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 461 [4],[5],[9] 461 [4],[5],[9]   464 [7],[8],[11]          
Investments at fair value 465 [4],[5],[9] 465 [4],[5],[9]   467 [7],[8],[11]          
Principal amount 465 [4],[5],[9],[10] 465 [4],[5],[9],[10]   467 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Beacon Pointe Harmony, LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       0          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       1,685          
Investment, Identifier [Axis]: Bonterra LLC, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[17] 15,028 15,028              
Investments at fair value [4],[5],[17] 15,027 15,027              
Principal amount [4],[5],[10],[17] 15,065 15,065              
Investment, Identifier [Axis]: Bonterra LLC, First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 346 346              
Investments at fair value [4],[5],[9] 346 346              
Principal amount [4],[5],[9],[10] 347 347              
Investment, Identifier [Axis]: Bonterra LLC, First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (3) (3)              
Investments at fair value [4],[5],[9] (3) (3)              
Principal amount [4],[5],[9],[10] 1,282 1,282              
Investment, Identifier [Axis]: Bonterra LLC, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 0 0              
Investments at fair value [4],[5],[9] (4) (4)              
Principal amount [4],[5],[9],[10] 1,629 1,629              
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (6) (6)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 1,594 1,594              
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien - Drawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[11],[28]       1,318          
Investments at fair value [7],[11],[28]       1,319          
Principal amount [7],[11],[12],[28]       1,319          
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien - Drawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       520          
Investments at fair value [7],[8],[11]       516          
Principal amount [7],[8],[11],[12]       516          
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       0          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       376          
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (6)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       1,594          
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien - Undrawn 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[11],[28]       (7)          
Investments at fair value [7],[11],[28]       0          
Principal amount [7],[11],[12],[28]       963          
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 19,836 [4],[29] 19,836 [4],[29]   19,931 [7],[28]          
Investments at fair value 19,919 [4],[29] 19,919 [4],[29]   20,019 [7],[28]          
Principal amount 19,919 [4],[10],[29] 19,919 [4],[10],[29]   20,019 [7],[12],[28]          
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 7,788 [4],[13],[14] 7,788 [4],[13],[14]   7,827 [7],[15],[16]          
Investments at fair value 7,788 [4],[13],[14] 7,788 [4],[13],[14]   7,827 [7],[15],[16]          
Principal amount 7,788 [4],[10],[13],[14] 7,788 [4],[10],[13],[14]   7,827 [7],[12],[15],[16]          
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[29] 1,304 1,304              
Investments at fair value [4],[29] 1,313 1,313              
Principal amount [4],[10],[29] 1,313 1,313              
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., First lien 4                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5] 517 517              
Investments at fair value [4],[5] 513 513              
Principal amount [4],[5],[10] 513 513              
Investment, Identifier [Axis]: Bullhorn, Inc., First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (4)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       935          
Investment, Identifier [Axis]: Bullhorn, Inc., First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       417          
Investments at fair value [7],[8],[11]       417          
Principal amount [7],[8],[11],[12]       417          
Investment, Identifier [Axis]: Bullhorn, Inc., First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11]          
Investments at fair value 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11]          
Principal amount 1,847 [4],[5],[9],[10] 1,847 [4],[5],[9],[10]   1,847 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Bullhorn, Inc., First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (4) (4)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 935 935              
Investment, Identifier [Axis]: Bullhorn, Inc., First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 13,173 [4],[13],[14] 13,173 [4],[13],[14]   13,170 [7],[15],[16]          
Investments at fair value 13,206 [4],[13],[14] 13,206 [4],[13],[14]   13,206 [7],[15],[16]          
Principal amount 13,206 [4],[10],[13],[14] 13,206 [4],[10],[13],[14]   13,206 [7],[12],[15],[16]          
Investment, Identifier [Axis]: Bullhorn, Inc., First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 8,917 [4],[5],[17] 8,917 [4],[5],[17]   8,452 [7],[8],[18]          
Investments at fair value 8,879 [4],[5],[17] 8,879 [4],[5],[17]   8,462 [7],[8],[18]          
Principal amount 8,879 [4],[5],[10],[17] 8,879 [4],[5],[10],[17]   8,462 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Bullhorn, Inc., First lien 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 3,394 [4],[13],[14] 3,394 [4],[13],[14]   3,394 [7],[15],[16]          
Investments at fair value 3,398 [4],[13],[14] 3,398 [4],[13],[14]   3,398 [7],[15],[16]          
Principal amount 3,398 [4],[10],[13],[14] 3,398 [4],[10],[13],[14]   3,398 [7],[12],[15],[16]          
Investment, Identifier [Axis]: Bullhorn, Inc., First lien 4                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 759 [4],[13],[14] 759 [4],[13],[14]   758 [7],[15],[16]          
Investments at fair value 761 [4],[13],[14] 761 [4],[13],[14]   761 [7],[15],[16]          
Principal amount 761 [4],[10],[13],[14] 761 [4],[10],[13],[14]   761 [7],[12],[15],[16]          
Investment, Identifier [Axis]: Bullhorn, Inc., First lien 5                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 340 [4],[13],[14] 340 [4],[13],[14]   340 [7],[15],[16]          
Investments at fair value 341 [4],[13],[14] 341 [4],[13],[14]   341 [7],[15],[16]          
Principal amount 341 [4],[10],[13],[14] 341 [4],[10],[13],[14]   341 [7],[12],[15],[16]          
Investment, Identifier [Axis]: Bullhorn, Inc., First lien 6                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 271 [4],[13],[14] 271 [4],[13],[14]   271 [7],[15],[16]          
Investments at fair value 272 [4],[13],[14] 272 [4],[13],[14]   272 [7],[15],[16]          
Principal amount 272 [4],[10],[13],[14] 272 [4],[10],[13],[14]   272 [7],[12],[15],[16]          
Investment, Identifier [Axis]: CB Buyer, Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[15],[16]       3,293          
Investments at fair value [7],[15],[16]       3,292          
Principal amount [7],[12],[15],[16]       3,308          
Investment, Identifier [Axis]: CB Buyer, Inc., First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (2)          
Investments at fair value [7],[8],[11]       (2)          
Principal amount [7],[8],[11],[12]       364          
Investment, Identifier [Axis]: CB Buyer, Inc., First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       0          
Investments at fair value [7],[8],[11]       (5)          
Principal amount [7],[8],[11],[12]       934          
Investment, Identifier [Axis]: CFS Management, LLC, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 11,957 [4],[5],[17] 11,957 [4],[5],[17]   11,880 [7],[15],[16]          
Investments at fair value 10,462 [4],[5],[17] 10,462 [4],[5],[17]   10,693 [7],[15],[16]          
Principal amount 11,957 [4],[5],[10],[17] 11,957 [4],[5],[10],[17]   11,881 [7],[12],[15],[16]          
Investment, Identifier [Axis]: CFS Management, LLC, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 3,571 [4],[13],[14] 3,571 [4],[13],[14]   3,548 [7],[15],[16]          
Investments at fair value 3,117 [4],[13],[14] 3,117 [4],[13],[14]   3,185 [7],[15],[16]          
Principal amount 3,562 [4],[10],[13],[14] 3,562 [4],[10],[13],[14]   3,539 [7],[12],[15],[16]          
Investment, Identifier [Axis]: CG Group Holdings, LLC, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 8,499 [4],[13],[14] 8,499 [4],[13],[14]   8,447 [7],[15],[16]          
Investments at fair value 8,537 [4],[13],[14] 8,537 [4],[13],[14]   8,449 [7],[15],[16]          
Principal amount 8,537 [4],[10],[13],[14] 8,537 [4],[10],[13],[14]   8,493 [7],[12],[15],[16]          
Investment, Identifier [Axis]: CG Group Holdings, LLC, First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 1,067 [4],[5],[9],[17] 1,067 [4],[5],[9],[17]   945 [7],[8],[11],[18]          
Investments at fair value 1,078 [4],[5],[9],[17] 1,078 [4],[5],[9],[17]   950 [7],[8],[11],[18]          
Principal amount 1,078 [4],[5],[9],[10],[17] 1,078 [4],[5],[9],[10],[17]   954 [7],[8],[11],[12],[18]          
Investment, Identifier [Axis]: CG Group Holdings, LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost (1) [4],[5],[9] (1) [4],[5],[9]   (3) [7],[8],[11]          
Investments at fair value 0 [4],[5],[9] 0 [4],[5],[9]   (1) [7],[8],[11]          
Principal amount 113 [4],[5],[9],[10] 113 [4],[5],[9],[10]   226 [7],[8],[11],[12]          
Investment, Identifier [Axis]: CRCI Longhorn Holdings, Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 6,454 [4],[13],[14] 6,454 [4],[13],[14]   6,484 [7],[15],[16]          
Investments at fair value 6,451 [4],[13],[14] 6,451 [4],[13],[14]   6,483 [7],[15],[16]          
Principal amount 6,483 [4],[10],[13],[14] 6,483 [4],[10],[13],[14]   6,516 [7],[12],[15],[16]          
Investment, Identifier [Axis]: CRCI Longhorn Holdings, Inc., First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11],[18]       486          
Investments at fair value [7],[8],[11],[18]       486          
Principal amount [7],[8],[11],[12],[18]       489          
Investment, Identifier [Axis]: CRCI Longhorn Holdings, Inc., First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost (5) [4],[5],[9] (5) [4],[5],[9]   (3) [7],[8],[11]          
Investments at fair value (5) [4],[5],[9] (5) [4],[5],[9]   (3) [7],[8],[11]          
Principal amount 1,086 [4],[5],[9],[10] 1,086 [4],[5],[9],[10]   597 [7],[8],[11],[12]          
Investment, Identifier [Axis]: CRCI Longhorn Holdings, Inc., First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11]          
Investments at fair value (8) [4],[5],[9] (8) [4],[5],[9]   (8) [7],[8],[11]          
Principal amount 1,629 [4],[5],[9],[10] 1,629 [4],[5],[9],[10]   1,629 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Calabrio, Inc., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost (6) [4],[5],[9] (6) [4],[5],[9]   (6) [7],[8],[11]          
Investments at fair value 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11]          
Principal amount 850 [4],[5],[9],[10] 850 [4],[5],[9],[10]   850 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Calabrio, Inc., First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 633 [4],[5],[9] 633 [4],[5],[9]   633 [7],[8],[11]          
Investments at fair value 637 [4],[5],[9] 637 [4],[5],[9]   637 [7],[8],[11]          
Principal amount 637 [4],[5],[9],[10] 637 [4],[5],[9],[10]   637 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Calabrio, Inc., First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 12,190 [4],[29] 12,190 [4],[29]   12,244 [7],[28]          
Investments at fair value 12,224 [4],[29] 12,224 [4],[29]   12,286 [7],[28]          
Principal amount 12,224 [4],[10],[29] 12,224 [4],[10],[29]   12,286 [7],[12],[28]          
Investment, Identifier [Axis]: Calabrio, Inc., First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 1,557 [4],[29] 1,557 [4],[29]   1,562 [7],[28]          
Investments at fair value 1,566 [4],[29] 1,566 [4],[29]   1,574 [7],[28]          
Principal amount 1,566 [4],[10],[29] 1,566 [4],[10],[29]   1,574 [7],[12],[28]          
Investment, Identifier [Axis]: Cardinal Parent, Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 11,634 [19] 11,634 [19]   11,689 [20]          
Investments at fair value 11,398 [19] 11,398 [19]   11,249 [20]          
Principal amount 11,670 [10],[19] 11,670 [10],[19]   11,730 [12],[20]          
Investment, Identifier [Axis]: Cardinal Parent, Inc., Second lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 9,715 [4],[19] 9,715 [4],[19]   9,709 [7],[20]          
Investments at fair value 9,613 [4],[19] 9,613 [4],[19]   9,423 [7],[20]          
Principal amount 9,767 [4],[10],[19] 9,767 [4],[10],[19]   9,767 [7],[12],[20]          
Investment, Identifier [Axis]: CentralSquare Technologies, LLC, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 35,886 [4],[13],[14] 35,886 [4],[13],[14]   35,399 [7],[15],[16]          
Investments at fair value 36,254 [4],[13],[14] 36,254 [4],[13],[14]   35,797 [7],[15],[16]          
Principal amount 36,254 [4],[10],[13],[14] 36,254 [4],[10],[13],[14]   35,797 [7],[12],[15],[16]          
Investment, Identifier [Axis]: CentralSquare Technologies, LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost (50) [4],[5],[9] (50) [4],[5],[9]   (50) [7],[8],[11]          
Investments at fair value 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11]          
Principal amount 3,980 [4],[5],[9],[10] 3,980 [4],[5],[9],[10]   3,980 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Ciklum Inc. First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 5,301 5,301              
Investments at fair value [4],[5],[9] 5,366 5,366              
Principal amount [4],[5],[9],[10] 5,366 5,366              
Investment, Identifier [Axis]: Ciklum Inc. First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 0 0              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 6,575 6,575              
Investment, Identifier [Axis]: Ciklum Inc. First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (37) (37)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 2,989 2,989              
Investment, Identifier [Axis]: Ciklum Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 9,390 [4],[13],[14] 9,390 [4],[13],[14]   9,430 [7],[15],[16],[24]          
Investments at fair value 9,488 [4],[13],[14] 9,488 [4],[13],[14]   9,536 [7],[15],[16],[24]          
Principal amount 9,488 [4],[10],[13],[14] 9,488 [4],[10],[13],[14]   9,536 [7],[12],[15],[16],[24]          
Investment, Identifier [Axis]: Ciklum Inc., First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       0          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       11,955          
Investment, Identifier [Axis]: Ciklum Inc., First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (37)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       2,989          
Investment, Identifier [Axis]: Cleanova US Holdings, LLC, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[13],[14],[23] 8,113 8,113              
Investments at fair value [4],[13],[14],[23] 8,123 8,123              
Principal amount [4],[10],[13],[14],[23] 8,406 8,406              
Investment, Identifier [Axis]: CommerceHub, Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 3,634 [5],[17] 3,634 [5],[17]   3,608 [7],[8],[18]          
Investments at fair value 3,900 [5],[17] 3,900 [5],[17]   3,920 [7],[8],[18]          
Principal amount 3,900 [5],[10],[17] 3,900 [5],[10],[17]   3,920 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Compsych Investments Corp., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 7,793 [4],[13],[14] 7,793 [4],[13],[14]   1,162 [7],[15],[16]          
Investments at fair value 7,827 [4],[13],[14] 7,827 [4],[13],[14]   1,162 [7],[15],[16]          
Principal amount 7,846 [4],[10],[13],[14] 7,846 [4],[10],[13],[14]   1,164 [7],[12],[15],[16]          
Investment, Identifier [Axis]: Compsych Investments Corp., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost (14) [4],[5],[9] (14) [4],[5],[9]   0 [7],[8],[11]          
Investments at fair value (6) [4],[5],[9] (6) [4],[5],[9]   (1) [7],[8],[11]          
Principal amount 2,253 [4],[5],[9],[10] 2,253 [4],[5],[9],[10]   333 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Convey Health Solutions, Inc., First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 13,292 [4],[5],[17] 13,292 [4],[5],[17]   13,101 [7],[8],[18]          
Investments at fair value 12,154 [4],[5],[17] 12,154 [4],[5],[17]   11,935 [7],[8],[18]          
Principal amount 13,337 [4],[5],[10],[17] 13,337 [4],[5],[10],[17]   13,152 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Convey Health Solutions, Inc., First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 2,213 [4],[5],[17] 2,213 [4],[5],[17]   2,180 [7],[8],[18]          
Investments at fair value 2,030 [4],[5],[17] 2,030 [4],[5],[17]   1,993 [7],[8],[18]          
Principal amount 2,227 [4],[5],[10],[17] 2,227 [4],[5],[10],[17]   2,196 [7],[8],[12],[18]          
Investment, Identifier [Axis]: CoreTrust Purchasing Group LLC, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 1,040 [4],[5],[17] 1,040 [4],[5],[17]   1,045 [7],[8],[18]          
Investments at fair value 1,044 [4],[5],[17] 1,044 [4],[5],[17]   1,050 [7],[8],[18]          
Principal amount 1,044 [4],[5],[10],[17] 1,044 [4],[5],[10],[17]   1,050 [7],[8],[12],[18]          
Investment, Identifier [Axis]: CoreTrust Purchasing Group LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (3)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       578          
Investment, Identifier [Axis]: CoreTrust Purchasing Group LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (3) (3)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 578 578              
Investment, Identifier [Axis]: Coupa Holdings, LLC, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 14,182 [4],[5],[17] 14,182 [4],[5],[17]   14,243 [7],[8],[18]          
Investments at fair value 14,316 [4],[5],[17] 14,316 [4],[5],[17]   14,388 [7],[8],[18]          
Principal amount 14,316 [4],[5],[10],[17] 14,316 [4],[5],[10],[17]   14,388 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Coupa Holdings, LLC, First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 0 0              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 1,291 1,291              
Investment, Identifier [Axis]: Coupa Holdings, LLC, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (12) (12)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 989 989              
Investment, Identifier [Axis]: Coupa Holdings, LLC, First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       0          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       1,291          
Investment, Identifier [Axis]: Coupa Holdings, LLC, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (12)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       989          
Investment, Identifier [Axis]: DCA Investment Holding, LLC, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 1,790 [4],[13],[14] 1,790 [4],[13],[14]   1,798 [7],[15],[16]          
Investments at fair value 1,634 [4],[13],[14] 1,634 [4],[13],[14]   1,758 [7],[15],[16]          
Principal amount 1,795 [4],[10],[13],[14] 1,795 [4],[10],[13],[14]   1,804 [7],[12],[15],[16]          
Investment, Identifier [Axis]: DCA Investment Holding, LLC, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 996 [4],[5],[17] 996 [4],[5],[17]   1,000 [7],[8],[18]          
Investments at fair value 918 [4],[5],[17] 918 [4],[5],[17]   987 [7],[8],[18]          
Principal amount 1,006 [4],[5],[10],[17] 1,006 [4],[5],[10],[17]   1,011 [7],[8],[12],[18]          
Investment, Identifier [Axis]: DG Investment Intermediate Holdings 2, Inc., Second lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 20,282 [5],[17] 20,282 [5],[17]   20,280 [8],[18]          
Investments at fair value 20,244 [5],[17] 20,244 [5],[17]   20,281 [8],[18]          
Principal amount 20,313 [5],[10],[17] 20,313 [5],[10],[17]   20,313 [8],[12],[18]          
Investment, Identifier [Axis]: DOCS, MSO, LLC, First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 120 120              
Investments at fair value [4],[5],[9] 119 119              
Principal amount [4],[5],[9],[10] 120 120              
Investment, Identifier [Axis]: DOCS, MSO, LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11]          
Investments at fair value (20) [4],[5],[9] (20) [4],[5],[9]   (13) [7],[8],[11]          
Principal amount 2,284 [4],[5],[9],[10] 2,284 [4],[5],[9],[10]   2,405 [7],[8],[11],[12]          
Investment, Identifier [Axis]: DOCS, MSO, LLC, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 18,243 [4],[5],[17] 18,243 [4],[5],[17]   18,337 [7],[8],[18]          
Investments at fair value 18,081 [4],[5],[17] 18,081 [4],[5],[17]   18,236 [7],[8],[18]          
Principal amount 18,243 [4],[5],[10],[17] 18,243 [4],[5],[10],[17]   18,337 [7],[8],[12],[18]          
Investment, Identifier [Axis]: DOCS, MSO, LLC, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 6,832 [4],[19] 6,832 [4],[19]   6,867 [7],[20]          
Investments at fair value 6,771 [4],[19] 6,771 [4],[19]   6,829 [7],[20]          
Principal amount 6,832 [4],[10],[19] 6,832 [4],[10],[19]   6,867 [7],[12],[20]          
Investment, Identifier [Axis]: DOCS, MSO, LLC, First lien 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[17] 3,348 3,348              
Investments at fair value [4],[5],[17] 3,341 3,341              
Principal amount [4],[5],[10],[17] 3,371 3,371              
Investment, Identifier [Axis]: DOXA Insurance Holdings LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 0 0              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 3,046 3,046              
Investment, Identifier [Axis]: DOXA Insurance Holdings LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       0          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       3,046          
Investment, Identifier [Axis]: DT1 Midco Corp, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [13],[14] 1,342 1,342              
Investments at fair value [13],[14] 1,342 1,342              
Principal amount [10],[13],[14] 1,348 1,348              
Investment, Identifier [Axis]: DT1 Midco Corp, First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 32 32              
Investments at fair value [4],[5],[9] 32 32              
Principal amount [4],[5],[9],[10] 32 32              
Investment, Identifier [Axis]: DT1 Midco Corp, First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [5],[9] (3) (3)              
Investments at fair value [5],[9] (3) (3)              
Principal amount [5],[9],[10] 674 674              
Investment, Identifier [Axis]: DT1 Midco Corp, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [5],[9] 0 0              
Investments at fair value [5],[9] (22) (22)              
Principal amount [5],[9],[10] 4,462 4,462              
Investment, Identifier [Axis]: Daxko Acquisition Corporation, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (10) (10)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 986 986              
Investment, Identifier [Axis]: Daxko Acquisition Corporation, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (10)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       986          
Investment, Identifier [Axis]: Daxko Acquisition Corporation, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 12,742 [4],[5],[17] 12,742 [4],[5],[17]   12,799 [7],[8],[18]          
Investments at fair value 12,812 [4],[5],[17] 12,812 [4],[5],[17]   12,878 [7],[8],[18]          
Principal amount 12,812 [4],[5],[10],[17] 12,812 [4],[5],[10],[17]   12,878 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Daxko Acquisition Corporation, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 1,073 [4],[13],[14] 1,073 [4],[13],[14]   1,078 [7],[15],[16]          
Investments at fair value 1,080 [4],[13],[14] 1,080 [4],[13],[14]   1,085 [7],[15],[16]          
Principal amount 1,080 [4],[10],[13],[14] 1,080 [4],[10],[13],[14]   1,085 [7],[12],[15],[16]          
Investment, Identifier [Axis]: Daxko Acquisition Corporation, First lien 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 64 [4],[5] 64 [4],[5]   64 [7],[8]          
Investments at fair value 65 [4],[5] 65 [4],[5]   65 [7],[8]          
Principal amount 65 [4],[5],[10] 65 [4],[5],[10]   65 [7],[8],[12]          
Investment, Identifier [Axis]: Dealer Tire Holdings, LLC, Preferred Shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Principal amount 84,739 84,739              
Investment, Identifier [Axis]: Dealer Tire Holdings, LLC, Preferred shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 75,927 [4],[5],[17],[30] 75,927 [4],[5],[17],[30]   75,927 [7],[8],[18]          
Investments at fair value 77,553 [4],[5],[17],[30] 77,553 [4],[5],[17],[30]   79,222 [7],[8],[18]          
Investment, Identifier [Axis]: Deca Dental Holdings LLC, First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11],[18]       2,997          
Investments at fair value [7],[8],[11],[18]       2,987          
Principal amount [7],[8],[11],[12],[18]       3,027          
Investment, Identifier [Axis]: Deca Dental Holdings LLC, First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9],[17] 2,997 2,997              
Investments at fair value [4],[5],[9],[17] 2,947 2,947              
Principal amount [4],[5],[9],[10],[17] 3,027 3,027              
Investment, Identifier [Axis]: Deca Dental Holdings LLC, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 36,706 [4],[13],[14] 36,706 [4],[13],[14]   36,871 [7],[15],[16]          
Investments at fair value 35,928 [4],[13],[14] 35,928 [4],[13],[14]   36,604 [7],[15],[16]          
Principal amount 36,902 [4],[10],[13],[14] 36,902 [4],[10],[13],[14]   37,094 [7],[12],[15],[16]          
Investment, Identifier [Axis]: Deca Dental Holdings LLC, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 3,863 [4],[5],[17] 3,863 [4],[5],[17]   3,880 [7],[8],[18]          
Investments at fair value 3,782 [4],[5],[17] 3,782 [4],[5],[17]   3,853 [7],[8],[18]          
Principal amount 3,884 [4],[5],[10],[17] 3,884 [4],[5],[10],[17]   3,905 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Diligent Corporation, First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (8) (8)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 2,096 2,096              
Investment, Identifier [Axis]: Diligent Corporation, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (13) (13)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 3,398 3,398              
Investment, Identifier [Axis]: Diligent Corporation, First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 169 169              
Investments at fair value [4],[5],[9] 170 170              
Principal amount [4],[5],[9],[10] 170 170              
Investment, Identifier [Axis]: Diligent Corporation, First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (8)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       2,265          
Investment, Identifier [Axis]: Diligent Corporation, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (13)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       3,398          
Investment, Identifier [Axis]: Diligent Corporation, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 19,758 [4],[13],[14] 19,758 [4],[13],[14]   19,753 [7],[15],[16]          
Investments at fair value 19,821 [4],[13],[14] 19,821 [4],[13],[14]   19,821 [7],[15],[16]          
Principal amount 19,821 [4],[10],[13],[14] 19,821 [4],[10],[13],[14]   19,821 [7],[12],[15],[16]          
Investment, Identifier [Axis]: Diligent Corporation, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 3,387 [4],[5],[17] 3,387 [4],[5],[17]   3,386 [7],[8],[18]          
Investments at fair value 3,398 [4],[5],[17] 3,398 [4],[5],[17]   3,398 [7],[8],[18]          
Principal amount 3,398 [4],[5],[10],[17] 3,398 [4],[5],[10],[17]   3,398 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Diligent Preferred Issuer, Inc., Preferred shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 14,912 [4],[5],[31] 14,912 [4],[5],[31]   14,162 [7],[8],[32]          
Investments at fair value 14,277 [4],[5],[31] 14,277 [4],[5],[31]   13,609 [7],[8],[32]          
Principal amount 15,037 15,037              
Investment, Identifier [Axis]: Eagle Infrastructure Services, LLC (fka FR Arsenal Holdings II Corp.), First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 10,628 [4],[13],[14] 10,628 [4],[13],[14]   10,628 [7],[15],[16]          
Investments at fair value 10,628 [4],[13],[14] 10,628 [4],[13],[14]   10,628 [7],[15],[16]          
Principal amount 10,628 [4],[10],[13],[14] 10,628 [4],[10],[13],[14]   10,628 [7],[12],[15],[16]          
Investment, Identifier [Axis]: Eagle Infrastructure Services, LLC (fka FR Arsenal Holdings II Corp.), First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 340 [4],[5] 340 [4],[5]   340 [7],[8]          
Investments at fair value 340 [4],[5] 340 [4],[5]   340 [7],[8]          
Principal amount 340 [4],[5],[10] 340 [4],[5],[10]   340 [7],[8],[12]          
Investment, Identifier [Axis]: Eagle Infrastructure Super HoldCo, LLC, Ordinary shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 4,104 [4],[5] 4,104 [4],[5]   4,104 [7],[8]          
Investments at fair value 7,370 [4],[5] 7,370 [4],[5]   8,188 [7],[8]          
Investment, Identifier [Axis]: Eclipse Buyer Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 7,080 [4],[19],[33] 7,080 [4],[19],[33]   7,078 [7],[20],[34]          
Investments at fair value 7,077 [4],[19],[33] 7,077 [4],[19],[33]   7,078 [7],[20],[34]          
Principal amount 7,113 [4],[10],[19],[33] 7,113 [4],[10],[19],[33]   7,113 [7],[12],[20],[34]          
Investment, Identifier [Axis]: Eclipse Buyer Inc., First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[9],[19] 0 0              
Investments at fair value [4],[9],[19] (6) (6)              
Principal amount [4],[9],[10],[19] 1,206 1,206              
Investment, Identifier [Axis]: Eclipse Buyer Inc., First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[11],[20]       0          
Investments at fair value [7],[11],[20]       (6)          
Principal amount [7],[11],[12],[20]       1,206          
Investment, Identifier [Axis]: Eclipse Buyer Inc., First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost (21) [4],[5],[9] (21) [4],[5],[9]   (21) [7],[8],[11]          
Investments at fair value (21) [4],[5],[9] (21) [4],[5],[9]   (21) [7],[8],[11]          
Principal amount 4,190 [4],[5],[9],[10] 4,190 [4],[5],[9],[10]   4,190 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Eclipse Topco Holdings, Inc. (fka Transcendia Holdings, Inc.), Ordinary shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 145 [4],[5] 145 [4],[5]   145 [7],[8]          
Investments at fair value 305 [4],[5] 305 [4],[5]   305 [7],[8]          
Investment, Identifier [Axis]: Eclipse Topco Holdings, Inc. (fka Transcendia Holdings, Inc.), Preferred shares 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8]       2,900          
Investments at fair value [7],[8]       2,900          
Investment, Identifier [Axis]: Eclipse Topco Holdings, Inc. (fka Transcendia Holdings, Inc.), Preferred shares 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8]       2,565          
Investments at fair value [7],[8]       2,702          
Investment, Identifier [Axis]: Eclipse Topco Holdings, Inc. (fka Transcendia Holdings, Inc.), Series A preferred shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5] 3,335 3,335              
Investments at fair value [4],[5] 3,335 3,335              
Principal amount 3,335 3,335              
Investment, Identifier [Axis]: Eclipse Topco Holdings, Inc. (fka Transcendia Holdings, Inc.), Series B preferred shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5] 2,565 2,565              
Investments at fair value [4],[5] 2,702 2,702              
Principal amount 3,691 3,691              
Investment, Identifier [Axis]: Eclipse Topco Holdings, Inc., Junior preferred shares, Non-accrual status                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 2,565 2,565              
Investments at fair value 2,702 2,702              
Unearned income 111 217              
Investment, Identifier [Axis]: Eclipse Topco, Inc., Preferred shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 2,075 [4],[19],[33] 2,075 [4],[19],[33]   1,952 [7],[20],[34]          
Investments at fair value 2,073 [4],[19],[33] 2,073 [4],[19],[33]   1,952 [7],[20],[34]          
Principal amount 2,094 2,094              
Investment, Identifier [Axis]: Edmentum Ultimate Holdings, LLC Subordinated                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[35] 24,274 24,274              
Investments at fair value [4],[5],[35] 24,333 24,333              
Principal amount [4],[5],[10],[35] 24,333 24,333              
Investment, Identifier [Axis]: Edmentum Ultimate Holdings, LLC, Subordinated                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8]       22,223          
Investments at fair value [7],[8]       22,290          
Principal amount [7],[8],[12]       22,290          
Investment, Identifier [Axis]: Einstein Parent, Inc. First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (57) (57)              
Investments at fair value [4],[5],[9] (57) (57)              
Principal amount [4],[5],[9],[10] 5,750 5,750              
Investment, Identifier [Axis]: Einstein Parent, Inc., First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[17] 55,056 55,056              
Investments at fair value [4],[5],[17] 55,026 55,026              
Principal amount [4],[5],[10],[17] 55,582 55,582              
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 0 0              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 909 909              
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[9],[29] 0 0              
Investments at fair value [4],[9],[29] 0 0              
Principal amount [4],[9],[10],[29] 2,723 2,723              
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien - Undrawn 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (14) (14)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 1,400 1,400              
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11],[36]       (14)          
Investments at fair value [7],[8],[11],[36]       0          
Principal amount [7],[8],[11],[12],[36]       1,400          
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 8,458 [4],[29] 8,458 [4],[29]   10,127 [7],[28]          
Investments at fair value 8,501 [4],[29] 8,501 [4],[29]   10,185 [7],[28]          
Principal amount 8,501 [4],[10],[29] 8,501 [4],[10],[29]   10,185 [7],[12],[28]          
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 4,708 [4],[5],[17] 4,708 [4],[5],[17]   5,636 [7],[8],[18]          
Investments at fair value 4,739 [4],[5],[17] 4,739 [4],[5],[17]   5,677 [7],[8],[18]          
Principal amount 4,739 [4],[5],[10],[17] 4,739 [4],[5],[10],[17]   5,677 [7],[8],[12],[18]          
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 2,838 [4],[29] 2,838 [4],[29]   3,398 [7],[28]          
Investments at fair value 2,854 [4],[29] 2,854 [4],[29]   3,419 [7],[28]          
Principal amount 2,854 [4],[10],[29] 2,854 [4],[10],[29]   3,419 [7],[12],[28]          
Investment, Identifier [Axis]: FS WhiteWater Borrower, LLC, First lien 4                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 2,821 [4],[29] 2,821 [4],[29]   3,378 [7],[28]          
Investments at fair value 2,836 [4],[29] 2,836 [4],[29]   3,397 [7],[28]          
Principal amount 2,836 [4],[10],[29] 2,836 [4],[10],[29]   3,397 [7],[12],[28]          
Investment, Identifier [Axis]: FS WhiteWater Holdings, LLC, Ordinary shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 5,000 [4],[29],[37] 5,000 [4],[29],[37]   5,000 [7],[28],[36]          
Investments at fair value 4,845 [4],[29],[37] 4,845 [4],[29],[37]   4,618 [7],[28],[36]          
Investment, Identifier [Axis]: Firebird Acquisition Corp, Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[17] 8,094 8,094              
Investments at fair value [4],[5],[17] 8,093 8,093              
Principal amount [4],[5],[10],[17] 8,113 8,113              
Investment, Identifier [Axis]: Firebird Acquisition Corp, Inc., First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 278 278              
Investments at fair value [4],[5],[9] 278 278              
Principal amount [4],[5],[9],[10] 278 278              
Investment, Identifier [Axis]: Firebird Acquisition Corp, Inc., First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (4) (4)              
Investments at fair value [4],[5],[9] (4) (4)              
Principal amount [4],[5],[9],[10] 1,422 1,422              
Investment, Identifier [Axis]: Firebird Acquisition Corp, Inc., First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 0 0              
Investments at fair value [4],[5],[9] (11) (11)              
Principal amount [4],[5],[9],[10] 4,462 4,462              
Investment, Identifier [Axis]: Firebird Co-Invest L.P., LP Interest                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[38] 3,358 3,358              
Investments at fair value [4],[5],[38] 3,358 3,358              
Investment, Identifier [Axis]: Flash Charm Inc. (fka Idera, Inc.), Second lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [19] 10,666 10,666              
Investments at fair value [19] 9,486 9,486              
Principal amount [10],[19] 10,719 10,719              
Investment, Identifier [Axis]: Flash Charm Inc. (fka Idera, Inc.), Second lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [5],[17] 1,426 1,426              
Investments at fair value [5],[17] 1,265 1,265              
Principal amount [5],[10],[17] 1,429 1,429              
Investment, Identifier [Axis]: Foreside Financial Group, LLC, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (17) (17)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 1,710 1,710              
Investment, Identifier [Axis]: Foreside Financial Group, LLC, First lien - Drawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 597 597              
Investments at fair value [4],[5],[9] 601 601              
Principal amount [4],[5],[9],[10] 601 601              
Investment, Identifier [Axis]: Foreside Financial Group, LLC, First lien - Drawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 383 383              
Investments at fair value [4],[5],[9] 387 387              
Principal amount [4],[5],[9],[10] 387 387              
Investment, Identifier [Axis]: Foreside Financial Group, LLC, First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11]          
Investments at fair value 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11]          
Principal amount 2,924 [4],[5],[9],[10] 2,924 [4],[5],[9],[10]   3,312 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Foreside Financial Group, LLC, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (21)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       2,095          
Investment, Identifier [Axis]: Foreside Financial Group, LLC, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 36,839 [4],[13],[14] 36,839 [4],[13],[14]   33,163 [7],[15],[16]          
Investments at fair value 37,000 [4],[13],[14] 37,000 [4],[13],[14]   33,356 [7],[15],[16]          
Principal amount 37,000 [4],[10],[13],[14] 37,000 [4],[10],[13],[14]   33,356 [7],[12],[15],[16]          
Investment, Identifier [Axis]: Foreside Financial Group, LLC, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 4,027 [4],[5],[17] 4,027 [4],[5],[17]   4,041 [7],[8],[18]          
Investments at fair value 4,054 [4],[5],[17] 4,054 [4],[5],[17]   4,075 [7],[8],[18]          
Principal amount 4,054 [4],[5],[10],[17] 4,054 [4],[5],[10],[17]   4,075 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (21) (21)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 2,145 2,145              
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9],[17] 708 708              
Investments at fair value [4],[5],[9],[17] 715 715              
Principal amount [4],[5],[9],[10],[17] 715 715              
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien - Drawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       990          
Investments at fair value [7],[8],[11]       1,001          
Principal amount [7],[8],[11],[12]       1,001          
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien - Drawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       343          
Investments at fair value [7],[8],[11]       342          
Principal amount [7],[8],[11],[12]       342          
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       0          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       3,360          
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (19)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       1,859          
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 16,991 [4],[13],[14] 16,991 [4],[13],[14]   17,066 [7],[15],[16]          
Investments at fair value 17,087 [4],[13],[14] 17,087 [4],[13],[14]   17,176 [7],[15],[16]          
Principal amount 17,087 [4],[10],[13],[14] 17,087 [4],[10],[13],[14]   17,176 [7],[12],[15],[16]          
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 12,233 [4],[5],[17] 12,233 [4],[5],[17]   11,946 [7],[8],[18]          
Investments at fair value 12,298 [4],[5],[17] 12,298 [4],[5],[17]   12,020 [7],[8],[18]          
Principal amount 12,298 [4],[5],[10],[17] 12,298 [4],[5],[10],[17]   12,020 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 978 [4],[5],[17] 978 [4],[5],[17]   79 [7],[8]          
Investments at fair value 977 [4],[5],[17] 977 [4],[5],[17]   80 [7],[8]          
Principal amount 977 [4],[5],[10],[17] 977 [4],[5],[10],[17]   80 [7],[8],[12]          
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien 4                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5] 79 79              
Investments at fair value [4],[5] 79 79              
Principal amount [4],[5],[10] 79 79              
Investment, Identifier [Axis]: Foundational Education Group, Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [14] 5,856 5,856              
Investments at fair value [14] 5,851 5,851              
Principal amount [10],[14] 6,400 6,400              
Investment, Identifier [Axis]: Foundational Education Group, Inc., Second lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 22,430 [4],[29] 22,430 [4],[29]   22,423 [7],[28]          
Investments at fair value 22,500 [4],[29] 22,500 [4],[29]   22,500 [7],[28]          
Principal amount 22,500 [4],[10],[29] 22,500 [4],[10],[29]   22,500 [7],[12],[28]          
Investment, Identifier [Axis]: Foundational Education Group, Inc., Second lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[15],[16]       6,992          
Investments at fair value [7],[15],[16]       7,009          
Principal amount [7],[12],[15],[16]       7,009          
Investment, Identifier [Axis]: Foundational Education Group, Inc., Second lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[17] 10,731 10,731              
Investments at fair value [4],[5],[17] 10,965 10,965              
Principal amount [4],[5],[10],[17] 10,965 10,965              
Investment, Identifier [Axis]: GC Waves Holdings, Inc., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (30) (30)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 3,951 3,951              
Investment, Identifier [Axis]: GC Waves Holdings, Inc., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (30)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       3,951          
Investment, Identifier [Axis]: GC Waves Holdings, Inc., First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 39,899 [4],[13],[14] 39,899 [4],[13],[14]   40,084 [7],[15],[16]          
Investments at fair value 40,110 [4],[13],[14] 40,110 [4],[13],[14]   40,312 [7],[15],[16]          
Principal amount 40,110 [4],[10],[13],[14] 40,110 [4],[10],[13],[14]   40,312 [7],[12],[15],[16]          
Investment, Identifier [Axis]: GC Waves Holdings, Inc., First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 21,283 [4],[29] 21,283 [4],[29]   21,386 [7],[28]          
Investments at fair value 21,341 [4],[29] 21,341 [4],[29]   21,448 [7],[28]          
Principal amount 21,341 [4],[10],[29] 21,341 [4],[10],[29]   21,448 [7],[12],[28]          
Investment, Identifier [Axis]: GEDC Equity, LLC, Participation Interest                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 190 [4],[5] 190 [4],[5]   190 [7],[8]          
Investments at fair value 50 [4],[5] 50 [4],[5]   50 [7],[8]          
Investment, Identifier [Axis]: GS Acquisitionco, Inc., First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       319          
Investments at fair value [7],[8],[11]       319          
Principal amount [7],[8],[11],[12]       319          
Investment, Identifier [Axis]: GS Acquisitionco, Inc., First lien - Drawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 450 450              
Investments at fair value [4],[5],[9] 448 448              
Principal amount [4],[5],[9],[10] 451 451              
Investment, Identifier [Axis]: GS Acquisitionco, Inc., First lien - Drawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 359 359              
Investments at fair value [4],[5],[9] 355 355              
Principal amount [4],[5],[9],[10] 357 357              
Investment, Identifier [Axis]: GS Acquisitionco, Inc., First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11]          
Investments at fair value (4) [4],[5],[9] (4) [4],[5],[9]   0 [7],[8],[11]          
Principal amount 759 [4],[5],[9],[10] 759 [4],[5],[9],[10]   1,120 [7],[8],[11],[12]          
Investment, Identifier [Axis]: GS Acquisitionco, Inc., First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost (27) [4],[5],[9] (27) [4],[5],[9]   (26) [7],[8],[11]          
Investments at fair value (22) [4],[5],[9] (22) [4],[5],[9]   0 [7],[8],[11]          
Principal amount 4,464 [4],[5],[9],[10] 4,464 [4],[5],[9],[10]   4,821 [7],[8],[11],[12]          
Investment, Identifier [Axis]: GS Acquisitionco, Inc., First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 25,176 [4],[13],[14] 25,176 [4],[13],[14]   34,663 [7],[15],[16]          
Investments at fair value 25,086 [4],[13],[14] 25,086 [4],[13],[14]   34,719 [7],[15],[16]          
Principal amount 25,212 [4],[10],[13],[14] 25,212 [4],[10],[13],[14]   34,719 [7],[12],[15],[16]          
Investment, Identifier [Axis]: GS Acquisitionco, Inc., First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 21,155 [4],[29] 21,155 [4],[29]   21,263 [7],[28]          
Investments at fair value 21,080 [4],[29] 21,080 [4],[29]   21,297 [7],[28]          
Principal amount 21,185 [4],[10],[29] 21,185 [4],[10],[29]   21,297 [7],[12],[28]          
Investment, Identifier [Axis]: GS Acquisitionco, Inc., First lien 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 2,888 [4],[5],[17] 2,888 [4],[5],[17]   2,902 [7],[8],[18]          
Investments at fair value 2,879 [4],[5],[17] 2,879 [4],[5],[17]   2,909 [7],[8],[18]          
Principal amount 2,894 [4],[5],[10],[17] 2,894 [4],[5],[10],[17]   2,909 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Galway Borrower LLC, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 1,078 [4],[13],[14] 1,078 [4],[13],[14]   1,083 [7],[15],[16]          
Investments at fair value 1,074 [4],[13],[14] 1,074 [4],[13],[14]   1,080 [7],[15],[16]          
Principal amount 1,084 [4],[10],[13],[14] 1,084 [4],[10],[13],[14]   1,090 [7],[12],[15],[16]          
Investment, Identifier [Axis]: Galway Borrower LLC, First lien (3)(11)(13)(16) - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9],[17] 1,771 1,771              
Investments at fair value [4],[5],[9],[17] 1,778 1,778              
Principal amount [4],[5],[9],[10],[17] 1,796 1,796              
Investment, Identifier [Axis]: Galway Borrower LLC, First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       1,779          
Investments at fair value [7],[8],[11]       1,788          
Principal amount [7],[8],[11],[12]       1,806          
Investment, Identifier [Axis]: GraphPAD Software, LLC, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 17,771 [4],[13],[14] 17,771 [4],[13],[14]   17,858 [7],[15],[16]          
Investments at fair value 17,811 [4],[13],[14] 17,811 [4],[13],[14]   17,856 [7],[15],[16]          
Principal amount 17,811 [4],[10],[13],[14] 17,811 [4],[10],[13],[14]   17,901 [7],[12],[15],[16]          
Investment, Identifier [Axis]: GraphPAD Software, LLC, First lien (3)(13)(16) - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (4) (4)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 1,682 1,682              
Investment, Identifier [Axis]: GraphPAD Software, LLC, First lien (3)(13)(16) - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (10) (10)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 4,038 4,038              
Investment, Identifier [Axis]: GraphPAD Software, LLC, First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 443 [4],[5],[9] 443 [4],[5],[9]   445 [7],[8],[11]          
Investments at fair value 445 [4],[5],[9] 445 [4],[5],[9]   446 [7],[8],[11]          
Principal amount 445 [4],[5],[9],[10] 445 [4],[5],[9],[10]   448 [7],[8],[11],[12]          
Investment, Identifier [Axis]: GraphPAD Software, LLC, First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (4)          
Investments at fair value [7],[8],[11]       (4)          
Principal amount [7],[8],[11],[12]       1,682          
Investment, Identifier [Axis]: GraphPAD Software, LLC, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (10)          
Investments at fair value [7],[8],[11]       (10)          
Principal amount [7],[8],[11],[12]       4,038          
Investment, Identifier [Axis]: Greenway Health, LLC, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 6,198 [4],[5],[17] 6,198 [4],[5],[17]   6,221 [7],[8],[18]          
Investments at fair value 6,270 [4],[5],[17] 6,270 [4],[5],[17]   6,302 [7],[8],[18]          
Principal amount 6,270 [4],[5],[10],[17] 6,270 [4],[5],[10],[17]   6,302 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Groundworks, LLC, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [20]       18,734          
Investments at fair value [20]       19,034          
Principal amount [12],[20]       18,908          
Investment, Identifier [Axis]: Groundworks, LLC, First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [11],[20]       552          
Investments at fair value [11],[20]       560          
Principal amount [11],[12],[20]       557          
Investment, Identifier [Axis]: Groundworks, LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [11],[20]       (15)          
Investments at fair value [11],[20]       20          
Principal amount [11],[12],[20]       2,938          
Investment, Identifier [Axis]: HBWM Holdings, LLC, Common units                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[39],[40] 4,750 4,750              
Investments at fair value [4],[39],[40] 9,532 9,532              
Investment, Identifier [Axis]: HBWM Holdings, LLC, Ordinary shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[41]       4,717          
Investments at fair value [7],[41]       9,532          
Investment, Identifier [Axis]: HBWM Holdings, LLC.                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Principal amount 4,750 4,750              
Investment, Identifier [Axis]: HS Purchaser, LLC / Help/Systems Holdings, Inc., Second lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 22,441 [29] 22,441 [29]   22,441 [28]          
Investments at fair value 17,044 [29] 17,044 [29]   14,513 [28]          
Principal amount 22,500 [10],[29] 22,500 [10],[29]   22,500 [12],[28]          
Investment, Identifier [Axis]: HS Purchaser, LLC / Help/Systems Holdings, Inc., Second lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 4,188 [13],[14] 4,188 [13],[14]   4,188 [15],[16]          
Investments at fair value 3,188 [13],[14] 3,188 [13],[14]   2,714 [15],[16]          
Principal amount 4,208 [10],[13],[14] 4,208 [10],[13],[14]   4,208 [12],[15],[16]          
Investment, Identifier [Axis]: Healthspan Buyer, LLC, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 5,002 [4],[5],[17] 5,002 [4],[5],[17]   5,025 [7],[8],[18]          
Investments at fair value 5,044 [4],[5],[17] 5,044 [4],[5],[17]   5,069 [7],[8],[18]          
Principal amount 5,044 [4],[5],[10],[17] 5,044 [4],[5],[10],[17]   5,069 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Healthspan Buyer, LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost (12) [4],[5],[9] (12) [4],[5],[9]   (12) [7],[8],[11]          
Investments at fair value 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11]          
Principal amount 1,229 [4],[5],[9],[10] 1,229 [4],[5],[9],[10]   1,229 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Higginbotham Insurance Agency, Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 3,788 [4],[5],[17] 3,788 [4],[5],[17]   3,808 [7],[8],[18]          
Investments at fair value 3,788 [4],[5],[17] 3,788 [4],[5],[17]   3,808 [7],[8],[18]          
Principal amount 3,788 [4],[5],[10],[17] 3,788 [4],[5],[10],[17]   3,808 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Higginbotham Insurance Agency, Inc., First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 4,045 [4],[5],[9] 4,045 [4],[5],[9]   2,302 [7],[8],[11]          
Investments at fair value 4,063 [4],[5],[9] 4,063 [4],[5],[9]   2,313 [7],[8],[11]          
Principal amount 4,063 [4],[5],[9],[10] 4,063 [4],[5],[9],[10]   2,313 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Higginbotham Insurance Agency, Inc., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11]          
Investments at fair value 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11]          
Principal amount 3,907 [4],[5],[9],[10] 3,907 [4],[5],[9],[10]   5,676 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Houghton Mifflin Harcourt Company, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 14,075 [5],[17] 14,075 [5],[17]   14,108 [8],[18]          
Investments at fair value 14,189 [5],[17] 14,189 [5],[17]   14,291 [8],[18]          
Principal amount 14,410 [5],[10],[17] 14,410 [5],[10],[17]   14,484 [8],[12],[18]          
Investment, Identifier [Axis]: IG Investments Holdings, LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (38) (38)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 3,780 3,780              
Investment, Identifier [Axis]: IG Investments Holdings, LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (38)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       3,780          
Investment, Identifier [Axis]: IG Investments Holdings, LLC, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 32,469 [4],[13],[14] 32,469 [4],[13],[14]   32,611 [7],[15],[16]          
Investments at fair value 32,635 [4],[13],[14] 32,635 [4],[13],[14]   32,799 [7],[15],[16]          
Principal amount 32,635 [4],[10],[13],[14] 32,635 [4],[10],[13],[14]   32,799 [7],[12],[15],[16]          
Investment, Identifier [Axis]: IG Investments Holdings, LLC, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 2,528 [4],[5],[17] 2,528 [4],[5],[17]   2,540 [7],[8],[18]          
Investments at fair value 2,529 [4],[5],[17] 2,529 [4],[5],[17]   2,542 [7],[8],[18]          
Principal amount 2,529 [4],[5],[10],[17] 2,529 [4],[5],[10],[17]   2,542 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Icefall Parent, Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 8,625 [4],[5],[17] 8,625 [4],[5],[17]   8,619 [7],[8],[18]          
Investments at fair value 8,696 [4],[5],[17] 8,696 [4],[5],[17]   8,696 [7],[8],[18]          
Principal amount 8,696 [4],[5],[10],[17] 8,696 [4],[5],[10],[17]   8,696 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Icefall Parent, Inc., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (8) (8)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 828 828              
Investment, Identifier [Axis]: Icefall Parent, Inc., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (8)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       828          
Investment, Identifier [Axis]: Idera, Inc., Second lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[20]       14,961          
Investments at fair value [7],[20]       15,091          
Principal amount [7],[12],[20]       15,091          
Investment, Identifier [Axis]: Idera, Inc., Second lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[18]       2,006          
Investments at fair value [7],[8],[18]       2,012          
Principal amount [7],[8],[12],[18]       2,012          
Investment, Identifier [Axis]: Infogain Corporation, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (29) (29)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 3,827 3,827              
Investment, Identifier [Axis]: Infogain Corporation, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (29)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       3,827          
Investment, Identifier [Axis]: Infogain Corporation, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 18,300 [4],[13],[14] 18,300 [4],[13],[14]   18,291 [7],[15],[16]          
Investments at fair value 18,372 [4],[13],[14] 18,372 [4],[13],[14]   18,372 [7],[15],[16]          
Principal amount 18,372 [4],[10],[13],[14] 18,372 [4],[10],[13],[14]   18,372 [7],[12],[15],[16]          
Investment, Identifier [Axis]: Infogain Corporation, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 7,680 [4],[5],[17] 7,680 [4],[5],[17]   7,713 [7],[8],[18]          
Investments at fair value 7,724 [4],[5],[17] 7,724 [4],[5],[17]   7,764 [7],[8],[18]          
Principal amount 7,724 [4],[5],[10],[17] 7,724 [4],[5],[10],[17]   7,764 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Infogain Corporation, Subordinated                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 16,809 [4],[5] 16,809 [4],[5]   16,795 [7],[8]          
Investments at fair value 16,953 [4],[5] 16,953 [4],[5]   16,953 [7],[8]          
Principal amount 16,953 [4],[5],[10] 16,953 [4],[5],[10]   16,953 [7],[8],[12]          
Investment, Identifier [Axis]: Integro Parent Inc., Second lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[18],[24]       6,405          
Investments at fair value [7],[8],[18],[24]       6,331          
Principal amount [7],[8],[12],[18],[24]       7,091          
Investment, Identifier [Axis]: Ivy Hill Middle Market Credit Fund, Ltd, Structured Finance Obligations                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 3,232 [4],[5],[23] 3,232 [4],[5],[23]   3,232 [8],[24]          
Investments at fair value 3,249 [4],[5],[23] 3,249 [4],[5],[23]   3,232 [8],[24]          
Principal amount [4],[5],[10],[23] 3,232 3,232              
Investment, Identifier [Axis]: KPSKY Acquisition Inc. First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 0 0              
Investments at fair value [4],[5],[9] (68) (68)              
Principal amount [4],[5],[9],[10] 1,568 1,568              
Investment, Identifier [Axis]: KPSKY Acquisition Inc., First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 19 [4],[5],[9] 19 [4],[5],[9]   19 [7],[8],[11]          
Investments at fair value 18 [4],[5],[9] 18 [4],[5],[9]   18 [7],[8],[11]          
Principal amount 19 [4],[5],[9],[10] 19 [4],[5],[9],[10]   19 [7],[8],[11],[12]          
Investment, Identifier [Axis]: KPSKY Acquisition Inc., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       0          
Investments at fair value [7],[8],[11]       (47)          
Principal amount [7],[8],[11],[12]       1,568          
Investment, Identifier [Axis]: KPSKY Acquisition Inc., First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 6,755 [4],[5],[17] 6,755 [4],[5],[17]   6,785 [7],[8],[18]          
Investments at fair value 6,473 [4],[5],[17] 6,473 [4],[5],[17]   6,570 [7],[8],[18]          
Principal amount 6,792 [4],[5],[10],[17] 6,792 [4],[5],[10],[17]   6,827 [7],[8],[12],[18]          
Investment, Identifier [Axis]: KPSKY Acquisition Inc., First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 1,135 [4],[5],[17] 1,135 [4],[5],[17]   1,140 [7],[8],[18]          
Investments at fair value 1,089 [4],[5],[17] 1,089 [4],[5],[17]   1,106 [7],[8],[18]          
Principal amount 1,143 [4],[5],[10],[17] 1,143 [4],[5],[10],[17]   1,149 [7],[8],[12],[18]          
Investment, Identifier [Axis]: KPSKY Acquisition Inc., First lien 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 774 [4],[5],[17] 774 [4],[5],[17]   777 [7],[8],[18]          
Investments at fair value 742 [4],[5],[17] 742 [4],[5],[17]   752 [7],[8],[18]          
Principal amount 778 [4],[5],[10],[17] 778 [4],[5],[10],[17]   782 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Kaseya Inc., First lien - Drawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11],[18]       966          
Investments at fair value [7],[8],[11],[18]       973          
Principal amount [7],[8],[11],[12],[18]       973          
Investment, Identifier [Axis]: Kaseya Inc., First lien - Drawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       746          
Investments at fair value [7],[8],[11]       751          
Principal amount [7],[8],[11],[12]       751          
Investment, Identifier [Axis]: Kaseya Inc., First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       0          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       2,865          
Investment, Identifier [Axis]: Kaseya Inc., First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (22)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       2,888          
Investment, Identifier [Axis]: Kaseya Inc., First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[15],[16]       63,786          
Investments at fair value [7],[15],[16]       64,124          
Principal amount [7],[12],[15],[16]       64,124          
Investment, Identifier [Axis]: Kaseya Inc., First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[18]       237          
Investments at fair value [7],[8],[18]       238          
Principal amount [7],[8],[12],[18]       238          
Investment, Identifier [Axis]: Kele Holdco, Inc., First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9],[17] 1,790 1,790              
Investments at fair value [4],[5],[9],[17] 1,799 1,799              
Principal amount [4],[5],[9],[10],[17] 1,799 1,799              
Investment, Identifier [Axis]: Kele Holdco, Inc., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (9)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       1,799          
Investment, Identifier [Axis]: Kele Holdco, Inc., First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 14,539 [4],[29] 14,539 [4],[29]   14,617 [7],[28]          
Investments at fair value 14,554 [4],[29] 14,554 [4],[29]   14,635 [7],[28]          
Principal amount 14,554 [4],[10],[29] 14,554 [4],[10],[29]   14,635 [7],[12],[28]          
Investment, Identifier [Axis]: Kele Holdco, Inc., First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 1,248 [4],[29] 1,248 [4],[29]   2,254 [7],[28]          
Investments at fair value 1,254 [4],[29] 1,254 [4],[29]   2,268 [7],[28]          
Principal amount 1,254 [4],[10],[29] 1,254 [4],[10],[29]   2,268 [7],[12],[28]          
Investment, Identifier [Axis]: Kene Acquisition, Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 3,462 [4],[13],[14] 3,462 [4],[13],[14]   3,477 [7],[15],[16]          
Investments at fair value 3,492 [4],[13],[14] 3,492 [4],[13],[14]   3,509 [7],[15],[16]          
Principal amount 3,492 [4],[10],[13],[14] 3,492 [4],[10],[13],[14]   3,509 [7],[12],[15],[16]          
Investment, Identifier [Axis]: Kene Acquisition, Inc., First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 0 0              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 1,398 1,398              
Investment, Identifier [Axis]: Kene Acquisition, Inc., First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (5) (5)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 468 468              
Investment, Identifier [Axis]: Kene Acquisition, Inc., First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 160 [4],[5],[9] 160 [4],[5],[9]   161 [7],[8],[11]          
Investments at fair value 161 [4],[5],[9] 161 [4],[5],[9]   162 [7],[8],[11]          
Principal amount 161 [4],[5],[9],[10] 161 [4],[5],[9],[10]   162 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Kene Acquisition, Inc., First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       0          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       1,398          
Investment, Identifier [Axis]: Kene Acquisition, Inc., First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (5)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       468          
Investment, Identifier [Axis]: Knockout Intermediate Holdings I Inc., Preferred shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 14,138 [4],[5],[42] 14,138 [4],[5],[42]   20,819 [7],[8],[43]          
Investments at fair value 14,237 [4],[5],[42] 14,237 [4],[5],[42]   21,010 [7],[8],[43]          
Principal amount 14,237 14,237              
Investment, Identifier [Axis]: LSCS Holdings, Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [13],[14] 5,066 5,066              
Investments at fair value [13],[14] 5,081 5,081              
Principal amount [10],[13],[14] 5,168 5,168              
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 6,123 [4],[29] 6,123 [4],[29]   6,065 [7],[28]          
Investments at fair value 6,116 [4],[29] 6,116 [4],[29]   6,062 [7],[28]          
Principal amount 6,178 [4],[10],[29] 6,178 [4],[10],[29]   6,124 [7],[12],[28]          
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC, First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 283 [4],[5],[9] 283 [4],[5],[9]   71 [7],[8],[11]          
Investments at fair value 283 [4],[5],[9] 283 [4],[5],[9]   71 [7],[8],[11]          
Principal amount 286 [4],[5],[9],[10] 286 [4],[5],[9],[10]   72 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC, First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 0 [4],[9],[29] 0 [4],[9],[29]   0 [7],[11],[28]          
Investments at fair value (4) [4],[9],[29] (4) [4],[9],[29]   (4) [7],[11],[28]          
Principal amount 358 [4],[9],[10],[29] 358 [4],[9],[10],[29]   358 [7],[11],[12],[28]          
Investment, Identifier [Axis]: Legends Hospitality Holding Company, LLC, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost (4) [4],[5],[9] (4) [4],[5],[9]   (6) [7],[8],[11]          
Investments at fair value (4) [4],[5],[9] (4) [4],[5],[9]   (6) [7],[8],[11]          
Principal amount 429 [4],[5],[9],[10] 429 [4],[5],[9],[10]   644 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Logrhythm, Inc. First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5] 4,143 4,143              
Investments at fair value [4],[5] 4,080 4,080              
Principal amount [4],[5],[10] 4,196 4,196              
Investment, Identifier [Axis]: Logrhythm, Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[18]       4,138          
Investments at fair value [7],[8],[18]       4,196          
Principal amount [7],[8],[12],[18]       4,196          
Investment, Identifier [Axis]: Logrhythm, Inc., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost (6) [4],[5],[9] (6) [4],[5],[9]   (6) [7],[8],[11]          
Investments at fair value (12) [4],[5],[9] (12) [4],[5],[9]   0 [7],[8],[11]          
Principal amount 420 [4],[5],[9],[10] 420 [4],[5],[9],[10]   420 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Low Voltage Holdings Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[17] 16,839 16,839              
Investments at fair value [4],[5],[17] 16,839 16,839              
Principal amount [4],[5],[10],[17] 16,902 16,902              
Investment, Identifier [Axis]: Low Voltage Holdings Inc., First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 0 0              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 5,257 5,257              
Investment, Identifier [Axis]: Low Voltage Holdings Inc., First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (3) (3)              
Investments at fair value [4],[5],[9] (3) (3)              
Principal amount [4],[5],[9],[10] 819 819              
Investment, Identifier [Axis]: Low Voltage Holdings Inc., First lien - Undrawn 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (9) (9)              
Investments at fair value [4],[5],[9] (9) (9)              
Principal amount [4],[5],[9],[10] 2,317 2,317              
Investment, Identifier [Axis]: MRI Software LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (9) (9)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 1,891 1,891              
Investment, Identifier [Axis]: MRI Software LLC, First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 111 [4],[5],[9] 111 [4],[5],[9]   111 [7],[8],[11]          
Investments at fair value 111 [4],[5],[9] 111 [4],[5],[9]   111 [7],[8],[11]          
Principal amount 111 [4],[5],[9],[10] 111 [4],[5],[9],[10]   111 [7],[8],[11],[12]          
Investment, Identifier [Axis]: MRI Software LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (9)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       1,891          
Investment, Identifier [Axis]: MRI Software LLC, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 21,293 [4],[29] 21,293 [4],[29]   21,398 [7],[28]          
Investments at fair value 21,317 [4],[29] 21,317 [4],[29]   21,430 [7],[28]          
Principal amount 21,317 [4],[10],[29] 21,317 [4],[10],[29]   21,430 [7],[12],[28]          
Investment, Identifier [Axis]: MRI Software LLC, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 7,543 [4],[5],[17] 7,543 [4],[5],[17]   7,580 [7],[8],[18]          
Investments at fair value 7,551 [4],[5],[17] 7,551 [4],[5],[17]   7,591 [7],[8],[18]          
Principal amount 7,551 [4],[5],[10],[17] 7,551 [4],[5],[10],[17]   7,591 [7],[8],[12],[18]          
Investment, Identifier [Axis]: MRI Software LLC, First lien 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 4,494 [4],[13],[14] 4,494 [4],[13],[14]   4,516 [7],[15],[16]          
Investments at fair value 4,498 [4],[13],[14] 4,498 [4],[13],[14]   4,521 [7],[15],[16]          
Principal amount 4,498 [4],[10],[13],[14] 4,498 [4],[10],[13],[14]   4,521 [7],[12],[15],[16]          
Investment, Identifier [Axis]: MRI Software LLC, First lien 4                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 3,088 [4],[13],[14] 3,088 [4],[13],[14]   3,103 [7],[15],[16]          
Investments at fair value 3,091 [4],[13],[14] 3,091 [4],[13],[14]   3,107 [7],[15],[16]          
Principal amount 3,091 [4],[10],[13],[14] 3,091 [4],[10],[13],[14]   3,107 [7],[12],[15],[16]          
Investment, Identifier [Axis]: MRI Software LLC, First lien 5                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 788 [4],[5],[17] 788 [4],[5],[17]   792 [7],[8],[18]          
Investments at fair value 789 [4],[5],[17] 789 [4],[5],[17]   793 [7],[8],[18]          
Principal amount 789 [4],[5],[10],[17] 789 [4],[5],[10],[17]   793 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Mai Capital Management Intermediate LLC, First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (1) (1)              
Investments at fair value [4],[5],[9] (1) (1)              
Principal amount [4],[5],[9],[10] 256 256              
Investment, Identifier [Axis]: Mai Capital Management Intermediate LLC, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 0 0              
Investments at fair value [4],[5],[9] (18) (18)              
Principal amount [4],[5],[9],[10] 3,692 3,692              
Investment, Identifier [Axis]: Mai Capital Management Intermediate LLC, First lien- Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 52 52              
Investments at fair value [4],[5],[9] 52 52              
Principal amount [4],[5],[9],[10] 52 52              
Investment, Identifier [Axis]: Michael Baker International, LLC, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [8],[18]       4,869          
Investments at fair value [8],[18]       4,910          
Principal amount [8],[12],[18]       4,892          
Investment, Identifier [Axis]: Model N, Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[15],[16]       44,008          
Investments at fair value [7],[15],[16]       43,997          
Principal amount [7],[12],[15],[16]       44,218          
Investment, Identifier [Axis]: Model N, Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[13],[14] 43,800 43,800              
Investments at fair value [4],[13],[14] 43,996 43,996              
Principal amount [4],[10],[13],[14] 43,996 43,996              
Investment, Identifier [Axis]: Model N, Inc., First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 0 0              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 9,047 9,047              
Investment, Identifier [Axis]: Model N, Inc., First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (24) (24)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 4,825 4,825              
Investment, Identifier [Axis]: Model N, Inc., First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (24)          
Investments at fair value [7],[8],[11]       (24)          
Principal amount [7],[8],[11],[12]       4,825          
Investment, Identifier [Axis]: Model N, Inc., First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       0          
Investments at fair value [7],[8],[11]       (45)          
Principal amount [7],[8],[11],[12]       9,047          
Investment, Identifier [Axis]: NC Topco, LLC, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 5,865 [4],[13],[14] 5,865 [4],[13],[14]   5,825 [7],[15],[16]          
Investments at fair value 5,862 [4],[13],[14] 5,862 [4],[13],[14]   5,824 [7],[15],[16]          
Principal amount 5,891 [4],[10],[13],[14] 5,891 [4],[10],[13],[14]   5,853 [7],[12],[15],[16]          
Investment, Identifier [Axis]: NC Topco, LLC, First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost (3) [4],[5],[9] (3) [4],[5],[9]   (3) [7],[8],[11]          
Investments at fair value (3) [4],[5],[9] (3) [4],[5],[9]   (3) [7],[8],[11]          
Principal amount 669 [4],[5],[9],[10] 669 [4],[5],[9],[10]   669 [7],[8],[11],[12]          
Investment, Identifier [Axis]: NC Topco, LLC, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11]          
Investments at fair value (8) [4],[5],[9] (8) [4],[5],[9]   (8) [7],[8],[11]          
Principal amount 1,672 [4],[5],[9],[10] 1,672 [4],[5],[9],[10]   1,672 [7],[8],[11],[12]          
Investment, Identifier [Axis]: NHME Holdings Corp., Ordinary shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 4,000 [4],[5],[44] 4,000 [4],[5],[44]   4,000 [7],[8],[45]          
Investments at fair value 0 [4],[5],[44] 0 [4],[5],[44]   0 [7],[8],[45]          
Investment, Identifier [Axis]: NHME Holdings Corp., Warrants                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 1,000 [4],[5],[44] 1,000 [4],[5],[44]   1,000 [7],[8],[45]          
Investments at fair value 0 [4],[5],[44] 0 [4],[5],[44]   0 [7],[8],[45]          
Investment, Identifier [Axis]: NM GP Holdco, LLC, Membership interest                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 850 [4],[23],[46] 850 [4],[23],[46]   850 [7],[24],[47]          
Investments at fair value 393 [4],[23],[46] 393 [4],[23],[46]   322 [7],[24],[47]          
Investment, Identifier [Axis]: NM NL Holdings, L.P., Membership interest                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 74,248 [4],[23],[46] 74,248 [4],[23],[46]   74,248 [7],[24],[47]          
Investments at fair value 104,973 [4],[23],[46] 104,973 [4],[23],[46]   104,512 [7],[24],[47]          
Principal amount [4],[10],[23],[46] 0 0              
Investment, Identifier [Axis]: NM YI, LLC, Membership interest                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 6,272 [4],[46] 6,272 [4],[46]   6,272 [7],[47]          
Investments at fair value 8,874 [4],[46] 8,874 [4],[46]   9,960 [7],[47]          
Investment, Identifier [Axis]: NMC Crimson Holdings, Inc., First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 19,127 [4],[5],[17] 19,127 [4],[5],[17]   19,106 [7],[8],[18]          
Investments at fair value 19,259 [4],[5],[17] 19,259 [4],[5],[17]   19,259 [7],[8],[18]          
Principal amount 19,259 [4],[5],[10],[17] 19,259 [4],[5],[10],[17]   19,259 [7],[8],[12],[18]          
Investment, Identifier [Axis]: NMC Crimson Holdings, Inc., First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 4,998 [4],[5],[17] 4,998 [4],[5],[17]   4,996 [7],[8],[18]          
Investments at fair value 5,012 [4],[5],[17] 5,012 [4],[5],[17]   5,012 [7],[8],[18]          
Principal amount 5,012 [4],[5],[10],[17] 5,012 [4],[5],[10],[17]   5,012 [7],[8],[12],[18]          
Investment, Identifier [Axis]: NMC Crimson Holdings, Inc., First lien 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 4,879 [4],[13],[14] 4,879 [4],[13],[14]   4,874 [7],[15],[16]          
Investments at fair value 4,913 [4],[13],[14] 4,913 [4],[13],[14]   4,913 [7],[15],[16]          
Principal amount 4,913 [4],[10],[13],[14] 4,913 [4],[10],[13],[14]   4,913 [7],[12],[15],[16]          
Investment, Identifier [Axis]: NMC Crimson Holdings, Inc., First lien 4                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[17] 4,684 4,684              
Investments at fair value [4],[5],[17] 4,706 4,706              
Principal amount [4],[5],[10],[17] 4,706 4,706              
Investment, Identifier [Axis]: NMFC Senior Loan Program III LLC, Membership interest                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 160,000 [4],[5],[23] 160,000 [4],[5],[23]   160,000 [7],[8],[24]          
Investments at fair value 160,000 [4],[5],[23] 160,000 [4],[5],[23]   160,000 [7],[8],[24]          
Principal amount [4],[5],[10],[23] 0 0              
Investment, Identifier [Axis]: NMFC Senior Loan Program IV LLC, Membership interest                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 112,400 [4],[5],[23] 112,400 [4],[5],[23]   112,400 [7],[8],[24]          
Investments at fair value 112,400 [4],[5],[23] 112,400 [4],[5],[23]   112,400 [7],[8],[24]          
Principal amount [4],[5],[10],[23] 0 0              
Investment, Identifier [Axis]: National HME, Inc., Second lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 7,872 [4],[5],[44] 7,872 [4],[5],[44]   7,871 [7],[8],[45]          
Investments at fair value 3,000 [4],[5],[44] 3,000 [4],[5],[44]   3,000 [7],[8],[45]          
Principal amount 8,281 [4],[5],[10],[44] 8,281 [4],[5],[10],[44]   8,281 [7],[8],[12],[45]          
Investment, Identifier [Axis]: National HME, Inc., Second lien, Non-accrual status                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Unearned interest income 512 1,013              
Investment, Identifier [Axis]: Nelipak Holding Company First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Principal amount       17,109          
Investment, Identifier [Axis]: Nelipak Holding Company First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Principal amount       406          
Investment, Identifier [Axis]: Nelipak Holding Company First lien 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Principal amount       6,638          
Investment, Identifier [Axis]: Nelipak Holding Company First lien 4                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Principal amount       833          
Investment, Identifier [Axis]: Nelipak Holding Company, Drawn Revolver                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Principal amount 92 92              
Investment, Identifier [Axis]: Nelipak Holding Company, First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 0 0              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 3,501 3,501              
Investment, Identifier [Axis]: Nelipak Holding Company, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9],[17],[48] 0 0              
Investments at fair value [4],[5],[9],[17],[48] 0 0              
Principal amount | € [4],[5],[9],[10],[17],[48]     € 6,411            
Investment, Identifier [Axis]: Nelipak Holding Company, First lien - Undrawn 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (8) (8)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 1,071 1,071              
Investment, Identifier [Axis]: Nelipak Holding Company, First lien - Undrawn 4                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9],[17],[48] (8) (8)              
Investments at fair value [4],[5],[9],[17],[48] 0 0              
Principal amount | € [4],[5],[9],[10],[17],[48]     1,118            
Investment, Identifier [Axis]: Nelipak Holding Company, First lien - Drawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 1,530 [4],[5],[9],[17],[48] 1,530 [4],[5],[9],[17],[48]   1,089 [7],[8],[11],[18],[49]          
Investments at fair value 1,541 [4],[5],[9],[17],[48] 1,541 [4],[5],[9],[17],[48]   1,097 [7],[8],[11],[18],[49]          
Principal amount 1,541 [4],[5],[9],[10],[17],[48] 1,541 [4],[5],[9],[10],[17],[48]   1,097 [7],[8],[11],[12],[18],[49]          
Investment, Identifier [Axis]: Nelipak Holding Company, First lien - Drawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 89 [4],[5],[9] 89 [4],[5],[9]   406 [7],[8],[11]          
Investments at fair value 93 [4],[5],[9] 93 [4],[5],[9]   405 [7],[8],[11]          
Principal amount     78 [4],[5],[9],[10] 392 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Nelipak Holding Company, First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       0          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       3,501          
Investment, Identifier [Axis]: Nelipak Holding Company, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11],[18],[49]       0          
Investments at fair value [7],[8],[11],[18],[49]       0          
Principal amount [7],[8],[11],[12],[18],[49]       6,411          
Investment, Identifier [Axis]: Nelipak Holding Company, First lien - Undrawn 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11],[18],[49]       (6)          
Investments at fair value [7],[8],[11],[18],[49]       0          
Principal amount [7],[8],[11],[12],[18],[49]       804          
Investment, Identifier [Axis]: Nelipak Holding Company, First lien - Undrawn 4                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (11)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       1,515          
Investment, Identifier [Axis]: Nelipak Holding Company, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 17,695 [4],[5],[17],[48] 17,695 [4],[5],[17],[48]   17,776 [7],[8],[18],[49]          
Investments at fair value 19,386 [4],[5],[17],[48] 19,386 [4],[5],[17],[48]   17,108 [7],[8],[18],[49]          
Principal amount 19,383 19,383 € 16,440 [4],[5],[10],[17],[48]   € 16,523        
Investment, Identifier [Axis]: Nelipak Holding Company, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 8,919 [4],[13],[14] 8,919 [4],[13],[14]   8,961 [7],[15],[16]          
Investments at fair value 8,978 [4],[13],[14] 8,978 [4],[13],[14]   9,023 [7],[15],[16]          
Principal amount 8,978 [4],[10],[13],[14] 8,978 [4],[10],[13],[14]   9,023 [7],[12],[15],[16]          
Investment, Identifier [Axis]: Nelipak Holding Company, Undrawn Delayed Draw Term Loan                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Principal amount 7,558 7,558              
Investment, Identifier [Axis]: Nelipak Holding Company, Undrawn Revolver                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Principal amount 1,318 1,318              
Investment, Identifier [Axis]: New Benevis Holdco, Inc., First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 48,905 [4],[14] 48,905 [4],[14]   46,068 [7],[16]          
Investments at fair value 48,905 [4],[14] 48,905 [4],[14]   46,068 [7],[16]          
Principal amount 48,905 [4],[10],[14] 48,905 [4],[10],[14]   46,068 [7],[12],[16]          
Investment, Identifier [Axis]: New Benevis Holdco, Inc., First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 38,682 [4],[5],[17] 38,682 [4],[5],[17]   33,155 [7],[8],[18]          
Investments at fair value 38,682 [4],[5],[17] 38,682 [4],[5],[17]   33,155 [7],[8],[18]          
Principal amount 38,682 [4],[5],[10],[17] 38,682 [4],[5],[10],[17]   33,155 [7],[8],[12],[18]          
Investment, Identifier [Axis]: New Benevis Holdco, Inc., Subordinated                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 24,644 [4],[5] 24,644 [4],[5]   22,942 [7],[8]          
Investments at fair value 20,230 [4],[5] 20,230 [4],[5]   19,051 [7],[8]          
Principal amount 25,287 [4],[5],[10] 25,287 [4],[5],[10]   23,814 [7],[8],[12]          
Investment, Identifier [Axis]: New Benevis Topco, LLC, Common stock 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[14] 27,154 27,154              
Investments at fair value [4],[14] 27,667 27,667              
Investment, Identifier [Axis]: New Benevis Topco, LLC, Common stock 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5] 12,768 12,768              
Investments at fair value [4],[5] 12,966 12,966              
Investment, Identifier [Axis]: New Benevis Topco, LLC, Ordinary shares 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[16]       27,154          
Investments at fair value [7],[16]       28,481          
Investment, Identifier [Axis]: New Benevis Topco, LLC, Ordinary shares 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8]       12,768          
Investments at fair value [7],[8]       13,347          
Investment, Identifier [Axis]: New Permian Holdco, Inc., Ordinary shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 11,155 [4],[5] 11,155 [4],[5]   11,155 [7],[8]          
Investments at fair value 14,000 [4],[5] 14,000 [4],[5]   18,900 [7],[8]          
Investment, Identifier [Axis]: New Permian Holdco, L.L.C., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 23,336 [4],[5],[17] 23,336 [4],[5],[17]   23,336 [7],[8],[18]          
Investments at fair value 23,336 [4],[5],[17] 23,336 [4],[5],[17]   23,336 [7],[8],[18]          
Principal amount 23,336 [4],[5],[10],[17] 23,336 [4],[5],[10],[17]   23,336 [7],[8],[12],[18]          
Investment, Identifier [Axis]: New Permian Holdco, L.L.C., First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 25,501 [4],[5],[9],[17] 25,501 [4],[5],[9],[17]   20,840 [7],[8],[11],[18]          
Investments at fair value 25,501 [4],[5],[9],[17] 25,501 [4],[5],[9],[17]   20,840 [7],[8],[11],[18]          
Principal amount 25,501 [4],[5],[9],[10],[17] 25,501 [4],[5],[9],[10],[17]   20,840 [7],[8],[11],[12],[18]          
Investment, Identifier [Axis]: New Permian Holdco, L.L.C., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11]          
Investments at fair value 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11]          
Principal amount 6,394 [4],[5],[9],[10] 6,394 [4],[5],[9],[10]   1,055 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Next Holdco, LLC, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 6,261 [4],[13],[14] 6,261 [4],[13],[14]   3,471 [7],[15],[16]          
Investments at fair value 6,296 [4],[13],[14] 6,296 [4],[13],[14]   3,494 [7],[15],[16]          
Principal amount 6,296 [4],[10],[13],[14] 6,296 [4],[10],[13],[14]   3,494 [7],[12],[15],[16]          
Investment, Identifier [Axis]: Next Holdco, LLC, First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11]          
Investments at fair value 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11]          
Principal amount 903 [4],[5],[9],[10] 903 [4],[5],[9],[10]   903 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Next Holdco, LLC, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (3)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       339          
Investment, Identifier [Axis]: Next Holdco, LLC, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (3) (3)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 339 339              
Investment, Identifier [Axis]: Notorious Topco, LLC, First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 874 874              
Investments at fair value [4],[5],[9] 616 616              
Principal amount [4],[5],[9],[10] 880 880              
Investment, Identifier [Axis]: Notorious Topco, LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (7)          
Investments at fair value [7],[8],[11]       (71)          
Principal amount [7],[8],[11],[12]       880          
Investment, Identifier [Axis]: Notorious Topco, LLC, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 10,122 [4],[5],[17] 10,122 [4],[5],[17]   10,017 [7],[8],[18]          
Investments at fair value 7,115 [4],[5],[17] 7,115 [4],[5],[17]   9,241 [7],[8],[18]          
Principal amount 10,160 [4],[5],[10],[17] 10,160 [4],[5],[10],[17]   10,058 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Notorious Topco, LLC, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 9,993 [4],[5],[17] 9,993 [4],[5],[17]   9,889 [7],[8],[18]          
Investments at fair value 7,026 [4],[5],[17] 7,026 [4],[5],[17]   9,126 [7],[8],[18]          
Principal amount 10,033 [4],[5],[10],[17] 10,033 [4],[5],[10],[17]   9,932 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Notorious Topco, LLC, First lien 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 879 [4],[5],[17] 879 [4],[5],[17]   870 [7],[8],[18]          
Investments at fair value 620 [4],[5],[17] 620 [4],[5],[17]   805 [7],[8],[18]          
Principal amount 885 [4],[5],[10],[17] 885 [4],[5],[10],[17]   877 [7],[8],[12],[18]          
Investment, Identifier [Axis]: OA Buyer, Inc., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11],[50]       (36)          
Investments at fair value [7],[8],[11],[50]       0          
Principal amount [7],[8],[11],[12],[50]       3,600          
Investment, Identifier [Axis]: OA Buyer, Inc., First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[15],[16]       31,442          
Investments at fair value [7],[15],[16]       31,513          
Principal amount [7],[12],[15],[16]       31,513          
Investment, Identifier [Axis]: OA Buyer, Inc., First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[15],[16]       27,248          
Investments at fair value [7],[15],[16]       27,425          
Principal amount [7],[12],[15],[16]       27,425          
Investment, Identifier [Axis]: OA Buyer, Inc., First lien 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[15],[16]       1,724          
Investments at fair value [7],[15],[16]       1,736          
Principal amount [7],[12],[15],[16]       1,736          
Investment, Identifier [Axis]: OA Topco, L.P., Ordinary shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[50]       2,000          
Investments at fair value [7],[8],[50]       7,646          
Investment, Identifier [Axis]: OEConnection LLC, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[15],[16]       46,214          
Investments at fair value [7],[15],[16]       46,430          
Principal amount [7],[12],[15],[16]       46,430          
Investment, Identifier [Axis]: OEConnection LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (25) (25)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 5,063 5,063              
Investment, Identifier [Axis]: OEConnection LLC, First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       0          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       8,101          
Investment, Identifier [Axis]: OEConnection LLC, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (25)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       5,063          
Investment, Identifier [Axis]: OEConnection LLC, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[13],[14] 45,995 45,995              
Investments at fair value [4],[13],[14] 46,197 46,197              
Principal amount [4],[10],[13],[14] 46,197 46,197              
Investment, Identifier [Axis]: OEConnection LLC, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[17] 8,020 8,020              
Investments at fair value [4],[5],[17] 8,061 8,061              
Principal amount [4],[5],[10],[17] 8,061 8,061              
Investment, Identifier [Axis]: Oranje Holdco, Inc., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (23) (23)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 1,860 1,860              
Investment, Identifier [Axis]: Oranje Holdco, Inc., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (23)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       1,860          
Investment, Identifier [Axis]: Oranje Holdco, Inc., First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 14,752 [4],[5],[17] 14,752 [4],[5],[17]   7,370 [7],[15],[16]          
Investments at fair value 14,880 [4],[5],[17] 14,880 [4],[5],[17]   7,440 [7],[15],[16]          
Principal amount 14,880 [4],[5],[10],[17] 14,880 [4],[5],[10],[17]   7,440 [7],[12],[15],[16]          
Investment, Identifier [Axis]: Oranje Holdco, Inc., First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 5,409 [4],[5],[17] 5,409 [4],[5],[17]   7,369 [7],[8]          
Investments at fair value 5,454 [4],[5],[17] 5,454 [4],[5],[17]   7,440 [7],[8]          
Principal amount 5,454 [4],[5],[10],[17] 5,454 [4],[5],[10],[17]   7,440 [7],[8],[12]          
Investment, Identifier [Axis]: Oranje Holdco, Inc., First lien 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8]       5,404          
Investments at fair value [7],[8]       5,454          
Principal amount [7],[8],[12]       5,454          
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[20]       18,078          
Investments at fair value [7],[20]       18,161          
Principal amount [7],[12],[20]       18,161          
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[11],[20]       2,348          
Investments at fair value [7],[11],[20]       2,360          
Principal amount [7],[11],[12],[20]       2,360          
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien - Drawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[9],[19] 1,856 1,856              
Investments at fair value [4],[9],[19] 1,865 1,865              
Principal amount [4],[9],[10],[19] 1,865 1,865              
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien - Drawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 728 728              
Investments at fair value [4],[5],[9] 732 732              
Principal amount [4],[5],[9],[10] 732 732              
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 0 [4],[9],[19] 0 [4],[9],[19]   0 [7],[11],[20]          
Investments at fair value 0 [4],[9],[19] 0 [4],[9],[19]   0 [7],[11],[20]          
Principal amount 0 [4],[9],[10],[19] 0 [4],[9],[10],[19]   1,865 [7],[11],[12],[20]          
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost (5) [4],[5],[9] (5) [4],[5],[9]   (9) [7],[8],[11]          
Investments at fair value 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11]          
Principal amount 1,098 [4],[5],[9],[10] 1,098 [4],[5],[9],[10]   1,830 [7],[8],[11],[12]          
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[19] 20,331 20,331              
Investments at fair value [4],[19] 20,419 20,419              
Principal amount [4],[10],[19] 20,419 20,419              
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[17] 513 513              
Investments at fair value [4],[5],[17] 513 513              
Principal amount [4],[5],[10],[17] 513 513              
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost (5) [4],[5],[9] (5) [4],[5],[9]   (5) [7],[8],[11]          
Investments at fair value 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11]          
Principal amount 486 [4],[5],[9],[10] 486 [4],[5],[9],[10]   486 [7],[8],[11],[12]          
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 22,225 [4],[19] 22,225 [4],[19]   22,332 [7],[20]          
Investments at fair value 22,275 [4],[19] 22,275 [4],[19]   22,388 [7],[20]          
Principal amount 22,275 [4],[10],[19] 22,275 [4],[10],[19]   22,388 [7],[12],[20]          
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[15],[16]       8,258          
Investments at fair value [7],[15],[16]       8,258          
Principal amount [7],[12],[15],[16]       8,258          
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[13],[14] 8,217 8,217              
Investments at fair value [4],[13],[14] 8,217 8,217              
Principal amount [4],[10],[13],[14] 8,217 8,217              
Investment, Identifier [Axis]: PPVA Black Elk (Equity) LLC, Subordinated                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 14,500 [4],[5] 14,500 [4],[5]   14,500 [7],[8]          
Investments at fair value 6,525 [4],[5] 6,525 [4],[5]   6,525 [7],[8]          
Principal amount 14,500 [4],[5],[10] 14,500 [4],[5],[10]   14,500 [7],[8],[12]         $ 20,000
Investment, Identifier [Axis]: PPVA Fund, L.P., Collateralized Financing                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 0 [51],[52] 0 [51],[52]   0 [53],[54]          
Investments at fair value 0 [51],[52] 0 [51],[52]   0 [53],[54]          
Principal amount 0 [10],[51],[52] 0 [10],[51],[52]   0 [12],[53],[54]          
Investment, Identifier [Axis]: Park Place Technologies, LLC, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 7,598 [4],[13],[14] 7,598 [4],[13],[14]   7,635 [7],[15],[16]          
Investments at fair value 7,596 [4],[13],[14] 7,596 [4],[13],[14]   7,635 [7],[15],[16]          
Principal amount 7,615 [4],[10],[13],[14] 7,615 [4],[10],[13],[14]   7,654 [7],[12],[15],[16]          
Investment, Identifier [Axis]: Park Place Technologies, LLC, First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9],[17] 264 264              
Investments at fair value [4],[5],[9],[17] 264 264              
Principal amount [4],[5],[9],[10],[17] 264 264              
Investment, Identifier [Axis]: Park Place Technologies, LLC, First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 619 [4],[5],[9] 619 [4],[5],[9]   258 [7],[8],[11],[18]          
Investments at fair value 622 [4],[5],[9] 622 [4],[5],[9]   258 [7],[8],[11],[18]          
Principal amount 623 [4],[5],[9],[10] 623 [4],[5],[9],[10]   258 [7],[8],[11],[12],[18]          
Investment, Identifier [Axis]: Park Place Technologies, LLC, First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost (1) [4],[5],[9] (1) [4],[5],[9]   (2) [7],[8],[11]          
Investments at fair value (1) [4],[5],[9] (1) [4],[5],[9]   (2) [7],[8],[11]          
Principal amount 575 [4],[5],[9],[10] 575 [4],[5],[9],[10]   643 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Park Place Technologies, LLC, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost (2) [4],[5],[9] (2) [4],[5],[9]   (3) [7],[8],[11]          
Investments at fair value (2) [4],[5],[9] (2) [4],[5],[9]   (3) [7],[8],[11]          
Principal amount 637 [4],[5],[9],[10] 637 [4],[5],[9],[10]   1,201 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Permian Trust, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 0 [4],[5] 0 [4],[5]   0 [7],[8],[53]          
Investments at fair value 0 [4],[5] 0 [4],[5]   0 [7],[8],[53]          
Principal amount 3,409 [4],[5],[10] 3,409 [4],[5],[10]   3,409 [7],[8],[12],[53]          
Investment, Identifier [Axis]: Permian Trust, Trust Claim                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 0 [4],[55] 0 [4],[55]   0 [7],[53],[56]          
Investments at fair value 0 [4],[55] 0 [4],[55]   0 [7],[53],[56]          
Principal amount 247 [4],[10],[55] 247 [4],[10],[55]   247 [7],[12],[53],[56]          
Investment, Identifier [Axis]: PetVet Care Centers, LLC First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 0 0              
Investments at fair value [4],[5],[9] (91) (91)              
Principal amount [4],[5],[9],[10] 3,708 3,708              
Investment, Identifier [Axis]: PetVet Care Centers, LLC First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (37) (37)              
Investments at fair value [4],[5],[9] (91) (91)              
Principal amount [4],[5],[9],[10] 3,708 3,708              
Investment, Identifier [Axis]: PetVet Care Centers, LLC, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[15],[16]       27,895          
Investments at fair value [7],[15],[16]       28,145          
Principal amount [7],[12],[15],[16]       28,145          
Investment, Identifier [Axis]: PetVet Care Centers, LLC, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[17] 27,770 27,770              
Investments at fair value [4],[5],[17] 27,317 27,317              
Principal amount [4],[5],[10],[17] 28,003 28,003              
Investment, Identifier [Axis]: PetVet Care Centers, LLC, First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       0          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       3,708          
Investment, Identifier [Axis]: PetVet Care Centers, LLC, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (37)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       3,708          
Investment, Identifier [Axis]: Pioneer Buyer I, LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9],[57] (26) (26)              
Investments at fair value [4],[5],[9],[57] 0 0              
Principal amount [4],[5],[9],[10],[57] 3,284 3,284              
Investment, Identifier [Axis]: Pioneer Buyer I, LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11],[58]       (26)          
Investments at fair value [7],[8],[11],[58]       0          
Principal amount [7],[8],[11],[12],[58]       3,284          
Investment, Identifier [Axis]: Pioneer Buyer I, LLC, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 23,007 [4],[5],[17] 23,007 [4],[5],[17]   22,997 [7],[8],[18]          
Investments at fair value 23,089 [4],[5],[17] 23,089 [4],[5],[17]   23,089 [7],[8],[18]          
Principal amount 23,089 [4],[5],[10],[17] 23,089 [4],[5],[10],[17]   23,089 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Pioneer Buyer I, LLC, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 2,365 [4],[5],[17] 2,365 [4],[5],[17]   2,364 [7],[8],[18]          
Investments at fair value 2,374 [4],[5],[17] 2,374 [4],[5],[17]   2,374 [7],[8],[18]          
Principal amount 2,374 [4],[5],[10],[17] 2,374 [4],[5],[10],[17]   2,374 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Pioneer Topco I, L.P., Class A-2 common units                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[57],[59] 2,000 2,000              
Investments at fair value [4],[57],[59] 2,160 2,160              
Investment, Identifier [Axis]: Pioneer Topco I, L.P., Ordinary shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[58],[60]       2,000          
Investments at fair value [7],[58],[60]       2,000          
Investment, Identifier [Axis]: Planview Parent, Inc., Second lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 9,210 [4],[5],[17] 9,210 [4],[5],[17]   9,208 [15],[16]          
Investments at fair value 9,138 [4],[5],[17] 9,138 [4],[5],[17]   9,208 [15],[16]          
Principal amount 9,231 [4],[5],[10],[17] 9,231 [4],[5],[10],[17]   9,231 [12],[15],[16]          
Investment, Identifier [Axis]: Power Grid Holdings, Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 22,126 [4],[19] 22,126 [4],[19]   22,228 [7],[20]          
Investments at fair value 22,274 [4],[19] 22,274 [4],[19]   22,387 [7],[20]          
Principal amount 22,274 [4],[10],[19] 22,274 [4],[10],[19]   22,387 [7],[12],[20]          
Investment, Identifier [Axis]: Power Grid Holdings, Inc., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (40) (40)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 4,032 4,032              
Investment, Identifier [Axis]: Power Grid Holdings, Inc., First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 255 255              
Investments at fair value [4],[5],[9] 257 257              
Principal amount [4],[5],[9],[10] 257 257              
Investment, Identifier [Axis]: Power Grid Holdings, Inc., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (43)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       4,289          
Investment, Identifier [Axis]: Project Accelerate Parent, LLC, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 10,421 [4],[29] 10,421 [4],[29]   10,470 [7],[28]          
Investments at fair value 10,467 [4],[29] 10,467 [4],[29]   10,519 [7],[28]          
Principal amount 10,466 [4],[10],[29] 10,466 [4],[10],[29]   10,519 [7],[12],[28]          
Investment, Identifier [Axis]: Project Accelerate Parent, LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost (8) [4],[5],[9] (8) [4],[5],[9]   (8) [7],[8],[11]          
Investments at fair value 0 [4],[5],[9] 0 [4],[5],[9]   0 [7],[8],[11]          
Principal amount 1,510 [4],[5],[9],[10] 1,510 [4],[5],[9],[10]   1,510 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Project Essential Super Parent, Inc., Preferred shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8]       15,929          
Investments at fair value [7],[8]       14,833          
Investment, Identifier [Axis]: RLG Holdings, LLC, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 3,949 [13],[14] 3,949 [13],[14]   3,970 [15],[16]          
Investments at fair value 3,438 [13],[14] 3,438 [13],[14]   3,934 [15],[16]          
Principal amount 3,949 [10],[13],[14] 3,949 [10],[13],[14]   3,970 [12],[15],[16]          
Investment, Identifier [Axis]: RailPros Parent, LLC, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[13],[14] 5,814 5,814              
Investments at fair value [4],[13],[14] 5,813 5,813              
Principal amount [4],[10],[13],[14] 5,843 5,843              
Investment, Identifier [Axis]: RailPros Parent, LLC, First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 0 0              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 1,798 1,798              
Investment, Identifier [Axis]: RailPros Parent, LLC, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (4) (4)              
Investments at fair value [4],[5],[9] (4) (4)              
Principal amount [4],[5],[9],[10] 899 899              
Investment, Identifier [Axis]: Reorganized Careismatic Brands, LLC , Warrants 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[14] 182 182              
Investments at fair value [4],[14] 272 272              
Investment, Identifier [Axis]: Reorganized Careismatic Brands, LLC , Warrants 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5] 62 62              
Investments at fair value [4],[5] 93 93              
Investment, Identifier [Axis]: Reorganized Careismatic Brands, LLC, Trust Claim 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 152 [4],[14] 152 [4],[14]   152 [7],[16]          
Investments at fair value 152 [4],[14] 152 [4],[14]   152 [7],[16]          
Principal amount 152 [4],[10],[14] 152 [4],[10],[14]   152 [7],[12],[16]          
Investment, Identifier [Axis]: Reorganized Careismatic Brands, LLC, Trust Claim 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 52 [4],[5] 52 [4],[5]   52 [7],[8]          
Investments at fair value 52 [4],[5] 52 [4],[5]   52 [7],[8]          
Principal amount 52 [4],[5],[10] 52 [4],[5],[10]   52 [7],[8],[12]          
Investment, Identifier [Axis]: Reorganized Careismatic Brands, LLC, Warrants 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[16]       182          
Investments at fair value [7],[16]       327          
Investment, Identifier [Axis]: Reorganized Careismatic Brands, LLC, Warrants 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8]       62          
Investments at fair value [7],[8]       112          
Investment, Identifier [Axis]: Riskonnect Parent, LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       0          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       6,349          
Investment, Identifier [Axis]: Riskonnect Parent, LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 0 0              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 6,349 6,349              
Investment, Identifier [Axis]: Safety Borrower Holdings LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (2)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       384          
Investment, Identifier [Axis]: Safety Borrower Holdings LLC, First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 191 [4],[5],[9] 191 [4],[5],[9]   127 [7],[8],[11]          
Investments at fair value 192 [4],[5],[9] 192 [4],[5],[9]   128 [7],[8],[11]          
Principal amount 192 [4],[5],[9],[10] 192 [4],[5],[9],[10]   128 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Safety Borrower Holdings LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (2) (2)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 320 320              
Investment, Identifier [Axis]: Safety Borrower Holdings LLC, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 7,391 [4],[13],[14] 7,391 [4],[13],[14]   7,425 [7],[15],[16]          
Investments at fair value 7,408 [4],[13],[14] 7,408 [4],[13],[14]   7,446 [7],[15],[16]          
Principal amount 7,408 [4],[10],[13],[14] 7,408 [4],[10],[13],[14]   7,446 [7],[12],[15],[16]          
Investment, Identifier [Axis]: Safety Borrower Holdings LLC, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 1,515 [4],[5],[17] 1,515 [4],[5],[17]   1,523 [7],[8],[18]          
Investments at fair value 1,515 [4],[5],[17] 1,515 [4],[5],[17]   1,523 [7],[8],[18]          
Principal amount 1,515 [4],[5],[10],[17] 1,515 [4],[5],[10],[17]   1,523 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Sierra Enterprises, LLC, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 21,306 [4],[13],[14] 21,306 [4],[13],[14]   38,840 [7],[8],[18]          
Investments at fair value 21,304 [4],[13],[14] 21,304 [4],[13],[14]   42,450 [7],[8],[18]          
Principal amount 21,465 [4],[10],[13],[14] 21,465 [4],[10],[13],[14]   42,450 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Sierra Enterprises, LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (20) (20)              
Investments at fair value [4],[5],[9] (20) (20)              
Principal amount [4],[5],[9],[10] 2,717 2,717              
Investment, Identifier [Axis]: Sierra Hamilton Holdings Corporation, Ordinary shares 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 11,501 [4],[14] 11,501 [4],[14]   11,501 [7],[16]          
Investments at fair value 1,799 [4],[14] 1,799 [4],[14]   1,799 [7],[16]          
Investment, Identifier [Axis]: Sierra Hamilton Holdings Corporation, Ordinary shares 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 1,282 [4],[5] 1,282 [4],[5]   1,282 [7],[8]          
Investments at fair value 201 [4],[5] 201 [4],[5]   201 [7],[8]          
Investment, Identifier [Axis]: Specialtycare, Inc., First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9],[17] 286 286              
Investments at fair value [4],[5],[9],[17] 282 282              
Principal amount [4],[5],[9],[10],[17] 291 291              
Investment, Identifier [Axis]: Specialtycare, Inc., First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11],[18]       319          
Investments at fair value [7],[8],[11],[18]       315          
Principal amount [7],[8],[11],[12],[18]       324          
Investment, Identifier [Axis]: Specialtycare, Inc., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost (4) [4],[5],[9] (4) [4],[5],[9]   (4) [7],[8],[11]          
Investments at fair value (8) [4],[5],[9] (8) [4],[5],[9]   (7) [7],[8],[11]          
Principal amount 268 [4],[5],[9],[10] 268 [4],[5],[9],[10]   235 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Specialtycare, Inc., First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 10,124 [4],[13],[14] 10,124 [4],[13],[14]   10,167 [7],[15],[16]          
Investments at fair value 9,901 [4],[13],[14] 9,901 [4],[13],[14]   9,953 [7],[15],[16]          
Principal amount 10,194 [4],[10],[13],[14] 10,194 [4],[10],[13],[14]   10,247 [7],[12],[15],[16]          
Investment, Identifier [Axis]: Specialtycare, Inc., First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 75 [4],[5],[17] 75 [4],[5],[17]   76 [7],[8],[18]          
Investments at fair value 74 [4],[5],[17] 74 [4],[5],[17]   75 [7],[8],[18]          
Principal amount 77 [4],[5],[10],[17] 77 [4],[5],[10],[17]   77 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Symplr Software Intermediate Holdings, Inc.                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Principal amount 23,842 23,842              
Investment, Identifier [Axis]: Symplr Software Intermediate Holdings, Inc., Preferred shares 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[20]       16,363          
Investments at fair value [7],[20]       16,450          
Investment, Identifier [Axis]: Symplr Software Intermediate Holdings, Inc., Preferred shares 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[18]       5,641          
Investments at fair value [7],[8],[18]       5,671          
Investment, Identifier [Axis]: Symplr Software Intermediate Holdings, Inc., Series A preferred shares 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[19] 17,618 17,618              
Investments at fair value [4],[19] 17,313 17,313              
Investment, Identifier [Axis]: Symplr Software Intermediate Holdings, Inc., Series A preferred shares 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[17] 6,074 6,074              
Investments at fair value [4],[5],[17] 5,969 5,969              
Investment, Identifier [Axis]: Syndigo LLC, Second lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 22,408 [4],[19] 22,408 [4],[19]   22,397 [7],[20]          
Investments at fair value 22,500 [4],[19] 22,500 [4],[19]   22,500 [7],[20]          
Principal amount 22,500 [4],[10],[19] 22,500 [4],[10],[19]   22,500 [7],[12],[20]          
Investment, Identifier [Axis]: Syndigo LLC, Second lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 5,705 [4],[13],[14] 5,705 [4],[13],[14]   5,706 [7],[15],[16]          
Investments at fair value 5,697 [4],[13],[14] 5,697 [4],[13],[14]   5,697 [7],[15],[16]          
Principal amount 5,697 [4],[10],[13],[14] 5,697 [4],[10],[13],[14]   5,697 [7],[12],[15],[16]          
Investment, Identifier [Axis]: TMK Hawk Parent, Corp. First Lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 0 0              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 2,695 2,695              
Investment, Identifier [Axis]: TMK Hawk Parent, Corp., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       0          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       2,695          
Investment, Identifier [Axis]: TMK Hawk Parent, Corp., First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 12,058 [4],[14] 12,058 [4],[14]   11,782 [7],[16]          
Investments at fair value 10,593 [4],[14] 10,593 [4],[14]   10,402 [7],[16]          
Principal amount 12,554 [4],[10],[14] 12,554 [4],[10],[14]   12,327 [7],[12],[16]          
Investment, Identifier [Axis]: TMK Hawk Parent, Corp., First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 10,010 [4],[5],[17] 10,010 [4],[5],[17]   9,818 [7],[8]          
Investments at fair value 8,528 [4],[5],[17] 8,528 [4],[5],[17]   8,374 [7],[8]          
Principal amount 10,107 [4],[5],[10],[17] 10,107 [4],[5],[10],[17]   9,925 [7],[8],[12]          
Investment, Identifier [Axis]: TMK Hawk Parent, Corp., First lien 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 2,399 [4],[5],[17] 2,399 [4],[5],[17]   2,317 [7],[8]          
Investments at fair value 2,381 [4],[5],[17] 2,381 [4],[5],[17]   2,351 [7],[8]          
Principal amount 2,879 [4],[5],[10],[17] 2,879 [4],[5],[10],[17]   2,843 [7],[8],[12]          
Investment, Identifier [Axis]: TMK Hawk Parent, Corp., Subordinated 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 319 [4],[14] 319 [4],[14]   302 [7],[16]          
Investments at fair value 319 [4],[14] 319 [4],[14]   302 [7],[16]          
Principal amount 319 [4],[10],[14] 319 [4],[10],[14]   302 [7],[12],[16]          
Investment, Identifier [Axis]: TMK Hawk Parent, Corp., Subordinated 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 308 [4],[5] 308 [4],[5]   291 [7],[8]          
Investments at fair value 308 [4],[5] 308 [4],[5]   291 [7],[8]          
Principal amount 308 [4],[5],[10] 308 [4],[5],[10]   291 [7],[8],[12]          
Investment, Identifier [Axis]: TVG-Edmentum Holdings, LLC, Class B-1 Common Shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5] 43,212 43,212              
Investments at fair value [4],[5] 31,036 31,036              
Principal amount 48,080 48,080              
Investment, Identifier [Axis]: TVG-Edmentum Holdings, LLC, Class B-2 Common Shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5] 24,839 24,839              
Investments at fair value [4],[5] 19,176 19,176              
Principal amount 29,707 29,707              
Investment, Identifier [Axis]: TVG-Edmentum Holdings, LLC, Ordinary shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8]       66,651          
Investments at fair value [7],[8]       59,978          
Investment, Identifier [Axis]: TVG-Edmentum Holdings, LLC, Preferred shares                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8]       7,525          
Investments at fair value [7],[8]       9,352          
Investment, Identifier [Axis]: TVG-Edmentum Holdings, LLC, Series C-2 Preferred Units                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5] 8,100 8,100              
Investments at fair value [4],[5] 8,100 8,100              
Investment, Identifier [Axis]: Tennessee Bidco Limited, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[18],[24]       19,326          
Investments at fair value [7],[8],[18],[24]       19,321          
Principal amount [7],[8],[12],[18],[24]       19,418          
Investment, Identifier [Axis]: Tennessee Bidco Limited, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[17] 19,606 19,606              
Investments at fair value [4],[5],[17] 19,519 19,519              
Principal amount [4],[5],[10],[17] 19,617 19,617              
Investment, Identifier [Axis]: Tennessee Bidco Limited, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[14] 16,084 16,084              
Investments at fair value [4],[14] 16,003 16,003              
Principal amount [4],[10],[14] 16,084 16,084              
Investment, Identifier [Axis]: Tennessee Bidco Limited, First lien 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [14] 881 881              
Investments at fair value [14] 881 881              
Principal amount [10],[14] 881 881              
Investment, Identifier [Axis]: TigerConnect, Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[15],[16]       29,689          
Investments at fair value [7],[15],[16]       29,868          
Principal amount [7],[12],[15],[16]       29,868          
Investment, Identifier [Axis]: TigerConnect, Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[17] 29,714 29,714              
Investments at fair value [4],[5],[17] 29,868 29,868              
Principal amount [4],[5],[10],[17] 29,868 29,868              
Investment, Identifier [Axis]: TigerConnect, Inc., First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[9],[14] 0 0              
Investments at fair value [4],[9],[14] 0 0              
Principal amount [4],[9],[10],[14] 751 751              
Investment, Identifier [Axis]: TigerConnect, Inc., First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (43) (43)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 4,267 4,267              
Investment, Identifier [Axis]: TigerConnect, Inc., First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 2,990 [4],[9],[14] 2,990 [4],[9],[14]   2,440 [7],[11],[16]          
Investments at fair value 2,990 [4],[9],[14] 2,990 [4],[9],[14]   2,440 [7],[11],[16]          
Principal amount 2,968 [4],[9],[10],[14] 2,968 [4],[9],[10],[14]   2,440 [7],[11],[12],[16]          
Investment, Identifier [Axis]: TigerConnect, Inc., First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[11],[16]       0          
Investments at fair value [7],[11],[16]       0          
Principal amount [7],[11],[12],[16]       1,301          
Investment, Identifier [Axis]: TigerConnect, Inc., First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (43)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       4,267          
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corporation, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (15) (15)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 1,501 1,501              
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corporation, First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[11],[15],[16]       0          
Investments at fair value [7],[11],[15],[16]       0          
Principal amount [7],[11],[12],[15],[16]       785          
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corporation, First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (15)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       1,501          
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corporation, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 15,313 [4],[13],[14] 15,313 [4],[13],[14]   15,303 [7],[15],[16]          
Investments at fair value 15,382 [4],[13],[14] 15,382 [4],[13],[14]   15,382 [7],[15],[16]          
Principal amount 15,382 [4],[10],[13],[14] 15,382 [4],[10],[13],[14]   15,382 [7],[12],[15],[16]          
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corporation, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 5,128 [4],[13],[14] 5,128 [4],[13],[14]   4,438 [7],[15],[16]          
Investments at fair value 5,157 [4],[13],[14] 5,157 [4],[13],[14]   4,467 [7],[15],[16]          
Principal amount 5,157 [4],[10],[13],[14] 5,157 [4],[10],[13],[14]   4,467 [7],[12],[15],[16]          
Investment, Identifier [Axis]: USRP Holdings, Inc., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (9) (9)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 893 893              
Investment, Identifier [Axis]: USRP Holdings, Inc., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (9)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       893          
Investment, Identifier [Axis]: USRP Holdings, Inc., First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 6,913 [4],[5],[17] 6,913 [4],[5],[17]   6,946 [7],[8],[18]          
Investments at fair value 6,948 [4],[5],[17] 6,948 [4],[5],[17]   6,984 [7],[8],[18]          
Principal amount 6,948 [4],[5],[10],[17] 6,948 [4],[5],[10],[17]   6,984 [7],[8],[12],[18]          
Investment, Identifier [Axis]: USRP Holdings, Inc., First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 5,486 [4],[13],[14] 5,486 [4],[13],[14]   5,512 [7],[15],[16]          
Investments at fair value 5,513 [4],[13],[14] 5,513 [4],[13],[14]   5,541 [7],[15],[16]          
Principal amount 5,513 [4],[10],[13],[14] 5,513 [4],[10],[13],[14]   5,541 [7],[12],[15],[16]          
Investment, Identifier [Axis]: UniTek Global Services, Inc., Ordinary shares 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 1,925 [4],[14] 1,925 [4],[14]   1,925 [7],[16]          
Investments at fair value 0 [4],[14] 0 [4],[14]   0 [7],[16]          
Investment, Identifier [Axis]: UniTek Global Services, Inc., Ordinary shares 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 532 [4],[5] 532 [4],[5]   532 [7],[8]          
Investments at fair value 0 [4],[5] 0 [4],[5]   0 [7],[8]          
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred shares 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 55,166 [4],[5] 55,166 [4],[5]   22,803 [7],[8]          
Investments at fair value 58,490 [4],[5] 58,490 [4],[5]   20,646 [7],[8]          
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred shares 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 29,318 [4],[5] 29,318 [4],[5]   13,553 [7],[8]          
Investments at fair value 11,031 [4],[5] 11,031 [4],[5]   12,682 [7],[8]          
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred shares 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 26,946 [4],[14] 26,946 [4],[14]   19,795 [7],[8]          
Investments at fair value 0 [4],[14] 0 [4],[14]   3,080 [7],[8]          
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred shares 4                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 7,447 [4],[5] 7,447 [4],[5]   26,946 [7],[16]          
Investments at fair value 0 [4],[5] 0 [4],[5]   0 [7],[16]          
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred shares 5                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8]       7,447          
Investments at fair value [7],[8]       0          
Investment, Identifier [Axis]: UniTek Global Services, Inc., Second lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8]       15,608          
Investments at fair value [7],[8]       15,459          
Principal amount [7],[8],[12]       15,608          
Investment, Identifier [Axis]: UniTek Global Services, Inc., Second lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8]       6,919          
Investments at fair value [7],[8]       6,853          
Principal amount [7],[8],[12]       6,919          
Investment, Identifier [Axis]: UniTek Global Services, Inc., Warrants                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8]       0          
Investments at fair value [7],[8]       48,804          
Investment, Identifier [Axis]: Vehlo Purchaser, LLC First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [5],[9] (50) (50)              
Investments at fair value [5],[9] (50) (50)              
Principal amount [5],[9],[10] 9,970 9,970              
Investment, Identifier [Axis]: Viper Bidco,Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Principal amount 16,443 16,443              
Investment, Identifier [Axis]: Viper Bidco. Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 15,109 [4],[5],[17],[48] 15,109 [4],[5],[17],[48]   15,181 [7],[8],[18],[49]          
Investments at fair value 16,361 [4],[5],[17],[48] 16,361 [4],[5],[17],[48]   14,981 [7],[8],[18],[49]          
Principal amount 11,970 [4],[5],[10],[17],[48] 11,970 [4],[5],[10],[17],[48]   12,030 [7],[8],[12],[18],[49]          
Investment, Identifier [Axis]: Viper Bidco. Inc., First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost (17) [4],[5],[9] (17) [4],[5],[9]   0 [7],[8],[11]          
Investments at fair value (17) [4],[5],[9] (17) [4],[5],[9]   0 [7],[8],[11]          
Principal amount 3,320 [4],[5],[9],[10] 3,320 [4],[5],[9],[10]   4,150 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Viper Bidco. Inc., First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 0 [4],[5],[9] 0 [4],[5],[9]   (17) [7],[8],[11]          
Investments at fair value (21) [4],[5],[9] (21) [4],[5],[9]   (17) [7],[8],[11]          
Principal amount 4,150 [4],[5],[9],[10] 4,150 [4],[5],[9],[10]   3,320 [7],[8],[11],[12]          
Investment, Identifier [Axis]: Viper Bidco. Inc., First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Principal amount       15,057          
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (6) (6)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 2,040 2,040              
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (6)          
Investments at fair value [7],[8],[11]       0          
Principal amount [7],[8],[11],[12]       2,040          
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 15,489 [4],[13],[14] 15,489 [4],[13],[14]   15,565 [7],[15],[16]          
Investments at fair value 15,514 [4],[13],[14] 15,514 [4],[13],[14]   15,593 [7],[15],[16]          
Principal amount 15,514 [4],[10],[13],[14] 15,514 [4],[10],[13],[14]   15,593 [7],[12],[15],[16]          
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 11,829 [4],[5],[17] 11,829 [4],[5],[17]   11,887 [7],[8],[18]          
Investments at fair value 11,847 [4],[5],[17] 11,847 [4],[5],[17]   11,908 [7],[8],[18]          
Principal amount 11,847 [4],[5],[10],[17] 11,847 [4],[5],[10],[17]   11,908 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC, First lien 3                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 6,611 [4],[13],[14] 6,611 [4],[13],[14]   6,644 [7],[15],[16]          
Investments at fair value 6,625 [4],[13],[14] 6,625 [4],[13],[14]   6,659 [7],[15],[16]          
Principal amount 6,625 [4],[10],[13],[14] 6,625 [4],[10],[13],[14]   6,659 [7],[12],[15],[16]          
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC, First lien 4                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 1,216 [4],[5],[17] 1,216 [4],[5],[17]   1,221 [7],[8],[18]          
Investments at fair value 1,222 [4],[5],[17] 1,222 [4],[5],[17]   1,228 [7],[8],[18]          
Principal amount 1,222 [4],[5],[10],[17] 1,222 [4],[5],[10],[17]   1,228 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC, First lien 5                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 815 [4],[5],[17] 815 [4],[5],[17]   819 [7],[8],[18]          
Investments at fair value 819 [4],[5],[17] 819 [4],[5],[17]   824 [7],[8],[18]          
Principal amount 819 [4],[5],[10],[17] 819 [4],[5],[10],[17]   824 [7],[8],[12],[18]          
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC, Subordinated                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8]       4,185          
Investments at fair value [7],[8]       4,231          
Principal amount [7],[8],[12]       4,231          
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC, Subordinated                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5] 4,327 4,327              
Investments at fair value [4],[5] 4,372 4,372              
Principal amount [4],[5],[10] 4,372 4,372              
Investment, Identifier [Axis]: Xactly Corporation, First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 22,486 [4],[19] 22,486 [4],[19]   22,483 [7],[20]          
Investments at fair value 22,294 [4],[19] 22,294 [4],[19]   22,250 [7],[20]          
Principal amount 22,500 [4],[10],[19] 22,500 [4],[10],[19]   22,500 [7],[12],[20]          
Investment, Identifier [Axis]: Xactly Corporation, First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost (10) [4],[5],[9] (10) [4],[5],[9]   (10) [7],[8],[11]          
Investments at fair value (9) [4],[5],[9] (9) [4],[5],[9]   (11) [7],[8],[11]          
Principal amount 992 [4],[5],[9],[10] 992 [4],[5],[9],[10]   992 [7],[8],[11],[12]          
Investment, Identifier [Axis]: YLG Holding, Inc, First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[13],[14] 4,309 4,309              
Investments at fair value [4],[13],[14] 4,330 4,330              
Principal amount [4],[10],[13],[14] 4,330 4,330              
Investment, Identifier [Axis]: YLG Holding, Inc, First lien - Drawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 35 35              
Investments at fair value [4],[5],[9] 35 35              
Principal amount [4],[5],[9],[10] 35 35              
Investment, Identifier [Axis]: YLG Holding, Inc, First lien - Drawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 325 325              
Investments at fair value [4],[5],[9] 327 327              
Principal amount [4],[5],[9],[10] 327 327              
Investment, Identifier [Axis]: YLG Holding, Inc, First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[29] 21,745 21,745              
Investments at fair value [4],[29] 21,770 21,770              
Principal amount [4],[10],[29] 21,770 21,770              
Investment, Identifier [Axis]: YLG Holdings, Inc., First lien                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[28]       21,798          
Investments at fair value [7],[28]       21,825          
Principal amount [7],[12],[28]       21,825          
Investment, Identifier [Axis]: YLG Holdings, Inc., First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (1) (1)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 274 274              
Investment, Identifier [Axis]: YLG Holdings, Inc., First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (2) (2)              
Investments at fair value [4],[5],[9] 0 0              
Principal amount [4],[5],[9],[10] 340 340              
Investment, Identifier [Axis]: eResearchTechnology, Inc., First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9],[17] 289 289              
Investments at fair value [4],[5],[9],[17] 298 298              
Principal amount [4],[5],[9],[10],[17] 301 301              
Investment, Identifier [Axis]: eResearchTechnology, Inc., First lien - Undrawn 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (11) (11)              
Investments at fair value [4],[5],[9] (11) (11)              
Principal amount [4],[5],[9],[10] 1,074 1,074              
Investment, Identifier [Axis]: eResearchTechnology, Inc., First lien - Undrawn 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] 0 0              
Investments at fair value [4],[5],[9] (18) (18)              
Principal amount [4],[5],[9],[10] 1,847 1,847              
Investment, Identifier [Axis]: eResearchTechnology, Inc., First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[17] 11,268 11,268              
Investments at fair value [4],[5],[17] 11,266 11,266              
Principal amount [4],[5],[10],[17] 11,380 11,380              
Investment, Identifier [Axis]: eResearchTechnology, Inc., First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[17] 1,876 1,876              
Investments at fair value [4],[5],[17] 1,871 1,871              
Principal amount [4],[5],[10],[17] 1,889 1,889              
Investment, Identifier [Axis]: iCIMS, Inc. First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [4],[5],[9] (26) (26)              
Investments at fair value [4],[5],[9] (74) (74)              
Principal amount [4],[5],[9],[10] 3,000 3,000              
Investment, Identifier [Axis]: iCIMS, Inc., First lien - Drawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 530 [4],[5],[9] 530 [4],[5],[9]   705 [7],[8],[11]          
Investments at fair value 516 [4],[5],[9] 516 [4],[5],[9]   701 [7],[8],[11]          
Principal amount 529 [4],[5],[9],[10] 529 [4],[5],[9],[10]   706 [7],[8],[11],[12]          
Investment, Identifier [Axis]: iCIMS, Inc., First lien - Undrawn                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost [7],[8],[11]       (25)          
Investments at fair value [7],[8],[11]       (21)          
Principal amount [7],[8],[11],[12]       2,824          
Investment, Identifier [Axis]: iCIMS, Inc., First lien 1                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 44,563 [4],[13],[14] 44,563 [4],[13],[14]   44,537 [7],[15],[16]          
Investments at fair value 43,637 [4],[13],[14] 43,637 [4],[13],[14]   44,406 [7],[15],[16]          
Principal amount 44,742 [4],[10],[13],[14] 44,742 [4],[10],[13],[14]   44,742 [7],[12],[15],[16]          
Investment, Identifier [Axis]: iCIMS, Inc., First lien 2                  
Investment Company, Nonconsolidated Subsidiary [Line Items]                  
Cost 7,326 [4],[13],[14] 7,326 [4],[13],[14]   7,321 [7],[15],[16]          
Investments at fair value 7,184 [4],[13],[14] 7,184 [4],[13],[14]   7,311 [7],[15],[16]          
Principal amount $ 7,366 [4],[10],[13],[14] $ 7,366 [4],[10],[13],[14]   $ 7,366 [7],[12],[15],[16]          
[1] New Mountain Finance Corporation (the "Company") generally acquires its investments in private transactions exempt from registration under the Securities Act of 1933, as amended (the "Securities Act"). These investments are generally subject to certain limitations on resale, and may be deemed to be "restricted securities" under the Securities Act.
[2] New Mountain Finance Corporation (the "Company") generally acquires its investments in private transactions exempt from registration under the Securities Act of 1933, as amended (the "Securities Act"). These investments are generally subject to certain limitations on resale, and may be deemed to be "restricted securities" under the Securities Act.
[3] The Company holds ordinary shares in AAC Lender Holdings, LLC and two first lien term loans, a first lien revolver and subordinated notes in American Achievement Corporation, a partially-owned subsidiary of AAC Lender Holdings, LLC.
[4] The fair value of the Company's investment is determined using unobservable inputs that are significant to the overall fair value measurement. See Note 4. Fair Value, for details.
[5] Investment is held by New Mountain Finance Corporation
[6] The Company holds ordinary shares in AAC Lender Holdings, LLC and two first lien term loans, a first lien revolver and subordinated notes in American Achievement Corporation, a partially-owned subsidiary of AAC Lender Holdings, LLC.
[7] The fair value of the Company's investment is determined using unobservable inputs that are significant to the overall fair value measurement. See Note 4. Fair Value, for details.
[8] Investment is held by New Mountain Finance Corporation
[9] Par value amounts represent the drawn or undrawn (as indicated in type of investment) portion of revolving credit facilities or delayed draws. Cost amounts represent the cash received at settlement date net of the impact of paydowns and cash paid for drawn revolvers or delayed draws.
[10] Par amount is denominated in United States Dollar unless otherwise noted, which may include British Pound ("£") and/or Euro ("€").
[11] Par value amounts represent the drawn or undrawn (as indicated in type of investment) portion of revolving credit facilities or delayed draws. Cost amounts represent the cash received at settlement date net of the impact of paydowns and cash paid for drawn revolvers or delayed draws.
[12] Par amount is denominated in United States Dollar unless otherwise noted, which may include British Pound ("£") and/or Euro ("€").
[13] Investment is pledged as collateral for the Holdings Credit Facility, a revolving credit facility among the Company, as the Collateral Manager, New Mountain Finance Holdings, L.L.C. as the Borrower, Wells Fargo Securities, LLC, as the Administrative Agent, and Wells Fargo Bank, National Association, as the Lender and Collateral Custodian.. See Note 7. Borrowings, for details.
[14] Investment is held by New Mountain Finance Holdings, L.L.C.
[15] Investment is pledged as collateral for the Holdings Credit Facility, a revolving credit facility among the Company, as the Collateral Manager, New Mountain Finance Holdings, L.L.C. as the Borrower, Wells Fargo Securities, LLC, as the Administrative Agent, and Wells Fargo Bank, National Association, as the Lender and Collateral Custodian.. See Note 7. Borrowings, for details.
[16] Investment is held by New Mountain Finance Holdings, L.L.C.
[17] Investment is pledged as collateral for the NMFC Credit Facility, a revolving credit facility among the Company as the Borrower, Sumitomo Mitsui Banking Corporation, as administrative agent, sole lead arranger, and sole book runner, and the lenders party thereto. See Note 7. Borrowings, for details
[18] Investment is pledged as collateral for the NMFC Credit Facility, a revolving credit facility among the Company as the Borrower, Sumitomo Mitsui Banking Corporation, as administrative agent, sole lead arranger, and sole book runner, and the lenders party thereto. See Note 7. Borrowings, for details
[19] Investment is held by New Mountain Finance SBIC, L.P.
[20] Investment is held by New Mountain Finance SBIC, L.P.
[21] The Company holds investments in ACI Parent Inc. and a wholly-owned subsidiary of ACI Parent Inc. The Company holds a first lien term loan, two first lien delayed draws and a first lien revolver in ACI Group Holdings, Inc. and preferred equity in ACI Parent Inc. The Company's preferred equity investment is entitled to receive cumulative preferred dividends that is calculated using the stated value of the Company's equity investment plus the aggregate unpaid compounded dividends as of the date of determination. As of June 30, 2025, the Company's stated value of it's equity investment plus unpaid compounded dividends was $19,666.
[22] The Company holds investments in ACI Parent Inc. and a wholly-owned subsidiary of ACI Parent Inc. The Company holds a first lien term loan, two first lien delayed draws and a first lien revolver in ACI Group Holdings, Inc. and preferred equity in ACI Parent Inc.
[23] Indicates assets that the Company deems to be “non-qualifying assets” under Section 55(a) of the 1940 Act. Qualifying assets must represent at least 70.0% of the Company’s total assets at the time of acquisition of any additional non-qualifying assets. As of June 30, 2025, 15.5% of the Company’s total assets are represented by investments at fair value that are considered non-qualifying assets.
[24] Indicates assets that the Company deems to be “non-qualifying assets” under Section 55(a) of the 1940 Act. Qualifying assets must represent at least 70.0% of the Company’s total assets at the time of acquisition of any additional non-qualifying assets. As of December 31, 2024, 14.6% of the Company’s total assets are represented by investments at fair value that are considered non-qualifying assets.
[25] Investment is held by NMF Ancora Holdings, Inc.
[26] Investment is held by NMF Ancora Holdings, Inc.
[27] The Company holds preferred equity in Bamboo Health Intermediate Holdings, Inc.(fka Appriss Health Intermediate Holdings, Inc.) and holds a first lien term loan and a first lien revolver in Bamboo Health Holdings, LLC (fka Appriss Health, LLC), a wholly-owned subsidiary of Bamboo Health Intermediate Holdings, Inc.
[28] Investment is held by New Mountain Finance SBIC II, L.P.
[29] Investment is held by New Mountain Finance SBIC II, L.P.
[30] The Company's preferred equity investment in Dealer Tire Holdings, LLC is entitled to receive cumulative preferred dividends that is calculated using the stated value of the Company's equity investment plus the aggregate unpaid compounded dividends as of the date of determination. As of June 30, 2025, the Company's stated value of it's share plus unpaid compounded dividends was $84,739.
[31] The Company holds investments in two wholly-owned subsidiaries of Diamond Parent Holdings Corp. The Company holds two first lien term loans, a first lien delayed draw and a first lien revolver in Diligent Corporation and preferred equity in Diligent Preferred Issuer Inc. The Company's preferred equity investment is entitled to receive cumulative preferred dividends that is calculated using the stated value of the Company's equity investment plus the aggregate unpaid compounded dividends as of the date of determination. As of June 30, 2025, the Company's stated value of it's equity investment plus unpaid compounded dividends was $15,037.
[32] The Company holds investments in two wholly-owned subsidiaries of Diamond Parent Holdings Corp. The Company holds two first lien term loans, a first lien delayed draw and a first lien revolver in Diligent Corporation and preferred equity in Diligent Preferred Issuer Inc.
[33] The Company holds preferred equity in Eclipse Topco, Inc. and a first lien term loan, a first lien revolver and a first lien delayed draw in Eclipse Buyer, Inc., a wholly-owned subsidiary of Eclipse Topco, Inc. The Company's preferred equity investment is entitled to receive cumulative preferred dividends that is calculated using the stated value of the Company's equity investment plus the aggregate unpaid compounded dividends as of the date of determination. As of June 30, 2025, the Company's stated value of it's equity investment plus unpaid compounded dividends was $2,094.
[34] The Company holds preferred equity in Eclipse Topco, Inc. and a first lien term loan, a first lien revolver and a first lien delayed draw in Eclipse Buyer, Inc., a wholly-owned subsidiary of Eclipse Topco, Inc.
[35] The Company holds ordinary shares and Class B-1 and Class B-2 of preferred equity in TVG-Edmentum Holdings, LLC, and subordinated notes in Edmentum Ultimate Holdings, LLC, a wholly-owned subsidiary of TVG-Edmentum Holdings, LLC. As of June 30, 2025, the Company's stated value of the Company's Class B-1 and Class B-2 preferred equity investment plus unpaid compounded dividends was $48,080 and $29,707, respectively.
[36] The Company holds ordinary shares in FS WhiteWater Holdings, LLC, and a first lien term loan, a first lien revolver, and three first lien delayed draws in FS WhiteWater Borrower, LLC, a partially-owned subsidiary of FS WhiteWater Holdings, LLC.
[37] The Company holds ordinary shares in FS WhiteWater Holdings, LLC, and a first lien term loan, a first lien revolver, and five first lien delayed draws in FS WhiteWater Borrower, LLC, a partially-owned subsidiary of FS WhiteWater Holdings, LLC.
[38] The Company holds a LP Interest in Firebird Co-Invest L.P. and holds a first lien term loan, a first lien delayed and a first lien revolver in Firebird Acquisition Corp, Inc., a wholly-owned subsidiary of Firebird Co-Invest L.P. .
[39] The Company's common equity investment in HBWM Holdings, LLC. is entitled to receive cumulative return that is calculated using the unreturned original investment plus any unpaid capitalized dividends. As of June 30, 2025, the Company's unreturned original investment plus any unpaid capitalized dividends was $4,750.
[40] Investment is held by NMF HB, Inc.
[41] Investment is held by NMF HB, Inc.
[42] The Company's preferred equity investment in Knockout Intermediate Holdings I, Inc. is entitled to receive cumulative preferred dividends that is calculated using the stated value of the Company's equity investment plus the aggregate unpaid compounded dividends as of the date of determination. As of June 30, 2025, the Company's stated value of it's share plus unpaid compounded dividends was $14,237.
[43] The Company holds preferred equity in Knockout Intermediate Holdings I Inc. and a first lien term loan, a first lien revolver and two first lien delayed draws in Kaseya, Inc., a wholly-owned subsidiary of Knockout Intermediate Holdings I Inc.
[44] The Company holds ordinary shares and warrants in NHME Holdings Corp., as well as a second lien Tranche A Term Loan in National HME, Inc., a wholly-owned subsidiary of NHME Holdings Corp. The second lien Tranche A Term Loan is entitled to receive 20% of the interest earned on the first lien Tranche A Term Loan, which accrues interest at a rate of SOFR + 5.00%, and 20% of the interest earned on the first lien Tranche B Term Loan, which accrues interest at a rate of SOFR + 6.00%.
[45] The Company holds ordinary shares and warrants in NHME Holdings Corp., as well as a second lien Tranche A Term Loan in National HME, Inc., a wholly-owned subsidiary of NHME Holdings Corp. The second lien Tranche A Term Loan is entitled to receive 20% of the interest earned on the first lien Tranche A Term Loan, which accrues interest at a rate of SOFR + 5.00%, and 20% of the interest earned on the first lien Tranche B Term Loan, which accrues interest at a rate of SOFR + 6.00%.
[46] Investment is held by New Mountain Net Lease Corporation.
[47] Investment is held by New Mountain Net Lease Corporation.
[48] Investment is denominated in foreign currency and is translated into U.S. dollars as of the valuation date. As of June 30, 2025, the par value U.S. dollar equivalent of the Viper Bidco, Inc. first lien term loans is $16,443, the Nelipak Holding Company first lien term loan, undrawn delayed draw term loan, undrawn revolver and drawn revolver is $19,383, $7,558, $1,318 and $92, respectively. See Note 2. Summary of Significant Accounting Policies, for details
[49] Investment is denominated in foreign currency and is translated into U.S. dollars as of the valuation date. As of December 31, 2024, the par value U.S. dollar equivalent of the Viper Bidco, Inc. first lien term loans is $15,057 and the Nelipak Holding Company first lien term loan, drawn revolver, undrawn delayed draw term loan and undrawn revolver is $17,109, $406 $6,638 and $833, respectively. See Note 2. Summary of Significant Accounting Policies, for details.
[50] The Company holds ordinary shares in OA Topco, L.P., and three first lien term loans and a first lien revolver in OA Buyer, Inc., a wholly-owned subsidiary of OA Topco, L.P.
[51] Investment is on non-accrual status as of June 30, 2025. See Note 3. Investments, for details.
[52] The Company holds one security purchased under a collateralized agreement to resell on its Consolidated Statement of Assets and Liabilities with a cost basis of $30,000 and a fair value of $13,500 as of June 30, 2025. See Note 2. Summary of Significant Accounting Policies, for details.
[53] Investment is on non-accrual status. See Note 3. Investments, for details.
[54] The Company holds one security purchased under a collateralized agreement to resell on its Consolidated Statement of Assets and Liabilities with a cost basis of $30,000 and a fair value of $13,500 as of December 31, 2024. See Note 2. Summary of Significant Accounting Policies, for details.
[55] Investment is held by NMF Permian Holdings, LLC.
[56] Investment is held by NMF Permian Holdings, LLC.
[57] The Company holds ordinary shares in Pioneer Topco I, L.P., and two first lien term loans and a first lien revolver in Pioneer Buyer I, LLC, a wholly-owned subsidiary of Pioneer Topco I, L.P.
[58] The Company holds ordinary shares in Pioneer Topco I, L.P., and two first lien term loans and a first lien revolver in Pioneer Buyer I, LLC, a wholly-owned subsidiary of Pioneer Topco I, L.P.
[59] Investment is held by NMF Pioneer, Inc.
[60] Investment is held by NMF Pioneer, Inc.