XML 57 R43.htm IDEA: XBRL DOCUMENT v3.22.4
Investments - Additional Information (Details)
$ in Thousands
12 Months Ended
Feb. 25, 2022
member
Apr. 01, 2018
USD ($)
Dec. 31, 2022
USD ($)
investment
loan
Dec. 31, 2021
USD ($)
loan
investment
Dec. 31, 2020
USD ($)
investment
Aug. 12, 2022
USD ($)
Jun. 02, 2022
USD ($)
Jul. 08, 2021
USD ($)
Feb. 08, 2021
USD ($)
May 13, 2020
USD ($)
May 08, 2019
USD ($)
Summary of Investment Holdings [Line Items]                      
Purchases of portfolio investments     $ 884,800 $ 1,069,400 $ 743,200            
Total unused commitments to extend financing     308,532 234,658              
Fair Value     2,448,935 1,800,594              
Cost     2,562,398 1,787,824              
Borrowings under credit facilities     729,144 655,189              
Repayments received/sales of portfolio investments   $ 981,200                  
Total dividend income     30,204 8,879 3            
Distributions of realized gains by controlled investment companies     $ 6,181 $ 0 $ 0            
Number of members | member 2                    
Number of investments entered into | investment     95 112 76            
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]     Net unrealized appreciation (depreciation) on investments                
Investment, Identifier [Axis]: 1888 Industrial Services, LLC, Energy: Oil & Gas, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[3],[4],[5]     $ 0                
Cost [1],[2],[3],[4],[5]     419                
Investment, Identifier [Axis]: 1888 Industrial Services, LLC, Energy: Oil & Gas, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[3],[4],[5]     1,263                
Cost [1],[2],[3],[4],[5]     1,498                
Investment, Identifier [Axis]: 1888 Industrial Services, LLC, Energy: Oil & Gas, Warrants                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[4],[6]     0                
Cost [2],[4],[6]     0                
Investment, Identifier [Axis]: 1888 Industrial Services, LLC, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     0 $ 0              
Investment, Identifier [Axis]: 1888 Industrial Services, LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,263 0              
Investment, Identifier [Axis]: 1888 Industrial Services, LLC, Warrants                      
Summary of Investment Holdings [Line Items]                      
Fair Value     0 0              
Investment, Identifier [Axis]: 1WorldSync, Inc., IT Consulting & Other Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9]       16,434              
Cost [7],[8],[9]       16,185              
Investment, Identifier [Axis]: 1WorldSync, Inc., IT Consulting & Other Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     16,307                
Cost [1],[4],[10]     16,124                
Investment, Identifier [Axis]: A.T. Holdings II LTD, Other Financial, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4]     12,500                
Cost [4]     12,500                
Investment, Identifier [Axis]: ADB Safegate, Aerospace & Defense, Second Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,180 [1],[4],[5],[11] 5,106 [7],[9],[12]              
Cost     5,184 [1],[4],[5],[11] 5,091 [7],[9],[12]              
Investment, Identifier [Axis]: AIT Worldwide Logistics Holdings, Inc., Transportation Services, Partnership Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     798 [4],[6] 689 [8]              
Cost     349 [4],[6] 349 [8]              
Investment, Identifier [Axis]: AIT Worldwide Logistics Holdings, Inc., Transportation Services, Second Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     6,215 [1],[4],[5] 6,460 [7],[8],[9]              
Cost     6,339 [1],[4],[5] 6,325 [7],[8],[9]              
Investment, Identifier [Axis]: AMMC CLO 22, Limited Series 2018-22A, Multi-Sector Holdings, Subordinated Structured Notes                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[11]     3,190                
Cost [2],[11]     4,445                
Investment, Identifier [Axis]: AMMC CLO 23, Ltd. Series 2020-23A, Multi-Sector Holdings, Subordinated Structured Notes                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[11]     1,423                
Cost [2],[11]     1,860                
Investment, Identifier [Axis]: AP Aristotle Holdings, LLC, Oil Field Services, Subordinated Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8]       1,854              
Cost [8]       1,890              
Investment, Identifier [Axis]: APC1 Holding, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     354 0              
Investment, Identifier [Axis]: APC1 Holding, Diversified Manufacturing, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[13]     2,044                
Cost [1],[4],[11],[13]     1,952                
Investment, Identifier [Axis]: APOG Bidco Pty Ltd, Healthcare, Second Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[14]     2,073                
Cost [1],[4],[11],[14]     2,279                
Investment, Identifier [Axis]: AQA Acquisition Holding, Inc., High Tech Industries, Second Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     19,140 [1],[4],[5] 20,000 [7],[8],[9]              
Cost     19,564 [1],[4],[5] 19,510 [7],[8],[9]              
Investment, Identifier [Axis]: ASC Communications, LLC, Media & Entertainment, Class A Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     620                
Cost     539                
Investment, Identifier [Axis]: ASC Communications, LLC, Media & Entertainment, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     20,920                
Cost     20,920                
Investment, Identifier [Axis]: ASC Communications, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,089 0              
Investment, Identifier [Axis]: ASPEQ Heating Group LLC, Building Products, Air & Heating, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     8,367 [1],[4],[5] 8,464 [7],[8],[15]              
Cost     8,302 [1],[4],[5] 8,377 [7],[8],[15]              
Investment, Identifier [Axis]: ATL II MRO Holdings Inc, Transportation, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[16]     8,125                
Cost [1],[4],[16]     8,129                
Investment, Identifier [Axis]: ATL II MRO Holdings Inc, Transportation, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[16]     (42)                
Cost [1],[4],[16]     (41)                
Investment, Identifier [Axis]: ATL II MRO Holdings, Inc., Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,667 0              
Investment, Identifier [Axis]: AVSC Holding Corp., Advertising, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,416 [1],[17] 4,458 [7],[9]              
Cost     4,505 [1],[17] 4,405 [7],[9]              
Investment, Identifier [Axis]: AVSC Holding Corp., Advertising, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value     685 [1],[17] 693 [7],[9]              
Cost     700 [1],[17] 693 [7],[9]              
Investment, Identifier [Axis]: AVSC Holding Corp., Advertising, First Lien Senior Secured Term Loan 3                      
Summary of Investment Holdings [Line Items]                      
Fair Value     5,919 6,404              
Cost     5,703 5,399              
Investment, Identifier [Axis]: Accelerant Holdings, Banking, Finance, Insurance & Real Estate, Class A Convertible Preferred Equity                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6]     5,403                
Cost [4],[6]     5,000                
Investment, Identifier [Axis]: Accelerant Holdings, Banking, Finance, Insurance & Real Estate, Class A Convertible Preferred Equity1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6]     1,667                
Cost [4],[6]     1,667                
Investment, Identifier [Axis]: Accelerate Learning, Inc., Education Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     7,480 [1],[4],[5] 7,429 [7],[8],[9]              
Cost     7,511 [1],[4],[5] 7,486 [7],[8],[9]              
Investment, Identifier [Axis]: Acclime Holdings HK Limited , Delayed Draw Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 1,179              
Investment, Identifier [Axis]: Acclime Holdings HK Limited , Delayed Draw Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 110              
Investment, Identifier [Axis]: Acclime Holdings HK Limited, Business Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9],[12]       1,147              
Cost [7],[8],[9],[12]       1,138              
Investment, Identifier [Axis]: Acclime Holdings HK Limited, Business services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[18]     2,436                
Cost [1],[4],[11],[18]     2,447                
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Aerospace & Defense, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6]     436                
Cost [4],[6]     438                
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Aerospace & Defense, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     12,069 [1],[4],[5] 24,016 [7],[8],[19]              
Cost     12,099 [1],[4],[5] 24,684 [7],[8],[19]              
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Aerospace & Defense, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5]     1,116                
Cost [1],[4],[5]     1,122                
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,152 0              
Investment, Identifier [Axis]: Acogroup, Business Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[20]     7,276                
Cost [1],[4],[11],[20]     7,782                
Investment, Identifier [Axis]: Advantage Insurance, Inc., Preferred Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value       0 $ 5,947            
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Advertising, Printing & Publishing, Class A1 Partnership Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     671 [4],[6] 280 [8]              
Cost     280 [4],[6] 280 [8]              
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Advertising, Printing & Publishing, Class A2 Partnership Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     173 [4],[6] 72 [8]              
Cost     72 [4],[6] 72 [8]              
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Advertising, Printing & Publishing, Class B1 Partnership Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     0 [4],[6] 9 [8]              
Cost     9 [4],[6] 9 [8]              
Investment, Identifier [Axis]: Advantage Software Company (The), LLC, Advertising, Printing & Publishing, Class B2 Partnership Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     0 [4],[6] 2 [8]              
Cost     2 [4],[6] 2 [8]              
Investment, Identifier [Axis]: Aftermath Bidco Corporation, Professional Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9]       9,303              
Cost [7],[8],[9]       9,299              
Investment, Identifier [Axis]: Air Canada 2020-2 Class B Pass Through Trust, Airlines, Structured Secured Note - Class B                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,816 6,822              
Cost     4,841 6,170              
Investment, Identifier [Axis]: Air Comm Corporation, LLC, Aerospace & Defense, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     12,722 [1],[4],[5] 11,280 [7],[8],[9]              
Cost     12,671 [1],[4],[5] 11,265 [7],[8],[9]              
Investment, Identifier [Axis]: Air Comm Corporation, LLC, Delayed Draw Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 11              
Investment, Identifier [Axis]: Air Comm Corporation, LLC, Delayed Draw Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 1,448              
Investment, Identifier [Axis]: Alpine SG, LLC, High Tech Industries, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[4],[21]     22,677                
Cost [1],[2],[4],[21]     22,678                
Investment, Identifier [Axis]: Alpine US Bidco LLC, Agricultural Products, Second Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     16,704 [1],[17] 17,975 [7],[8],[9]              
Cost     17,692 [1],[17] 17,642 [7],[8],[9]              
Investment, Identifier [Axis]: Amalfi Midco, Healthcare, Class B Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6],[11]     1,121                
Cost [4],[6],[11]     1,040                
Investment, Identifier [Axis]: Amalfi Midco, Healthcare, Subordinated Loan Notes                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[5],[11]     4,303                
Cost [4],[5],[11]     4,451                
Investment, Identifier [Axis]: Amalfi Midco, Healthcare, Warrant                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6],[11]     426                
Cost [4],[6],[11]     4                
Investment, Identifier [Axis]: Amtech LLC, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,527 2,727              
Investment, Identifier [Axis]: Amtech LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     545 682              
Investment, Identifier [Axis]: Amtech LLC, Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,222 [1],[4],[17] 3,955 [7],[8],[15]              
Cost     2,205 [1],[4],[17] 3,958 [7],[8],[15]              
Investment, Identifier [Axis]: Amtech LLC, Technology, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value     128 [1],[4],[17] (14) [7],[8],[9]              
Cost     125 [1],[4],[17] (13) [7],[8],[9]              
Investment, Identifier [Axis]: Anagram Holdings, LLC, Chemicals, Plastics, & Rubber, First Lien Senior Secured Note                      
Summary of Investment Holdings [Line Items]                      
Fair Value     14,368 16,051 [12]              
Cost     14,392 13,459 [12]              
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, Bridge Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     366 0              
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, Chemicals, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[13]     2,330                
Cost [1],[4],[11],[13]     2,382                
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, Chemicals, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[13]     723                
Cost [1],[4],[11],[13]     790                
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, Chemicals, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[13]     5,623                
Cost [1],[4],[11],[13]     5,745                
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, Chemicals, First Lien Senior Secured Term Loan 3                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5],[11]     997                
Cost [1],[4],[5],[11]     1,019                
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, Chemicals, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[13]     (8)                
Cost [1],[4],[11],[13]     (5)                
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 6,207              
Investment, Identifier [Axis]: AnalytiChem Holding Gmbh, Chemicals, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[12],[22]       2,576              
Cost [7],[8],[12],[22]       2,580              
Investment, Identifier [Axis]: Anju Software, Inc., Application Software, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     11,006 [1],[4],[17] 13,284 [7],[8],[15]              
Cost     13,269 [1],[4],[17] 13,355 [7],[8],[15]              
Investment, Identifier [Axis]: Apex Bidco Limited, Business Equipment & Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,753 [1],[4],[11],[23] 1,970 [7],[8],[12],[24]              
Cost     1,876 [1],[4],[11],[23] 1,869 [7],[8],[12],[24]              
Investment, Identifier [Axis]: Apex Bidco Limited, Business Equipment & Services, Subordinated Senior Unsecured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     266 [4],[11] 278 [8],[12]              
Cost     285 [4],[11] 264 [8],[12]              
Investment, Identifier [Axis]: Apidos CLO XXIV, Series 2016-24A, Multi-Sector Holdings, Subordinated Structured Notes                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[11]     6,635                
Cost [2],[11]     6,934                
Investment, Identifier [Axis]: Aptus 1829. GmbH, Chemicals, Plastics, & Rubber, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8],[12]       11              
Cost [8],[12]       12              
Investment, Identifier [Axis]: Aptus 1829. GmbH, Chemicals, Plastics, & Rubber, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[12],[22]       4,552              
Cost [7],[8],[12],[22]       4,717              
Investment, Identifier [Axis]: Aptus 1829. GmbH, Chemicals, Plastics, & Rubber, Preferred Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8],[12]       111              
Cost [8],[12]       120              
Investment, Identifier [Axis]: Aptus 1829. GmbH, Chemicals, Plastics, and Rubber, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6],[11]     6                
Cost [4],[6],[11]     12                
Investment, Identifier [Axis]: Aptus 1829. GmbH, Chemicals, Plastics, and Rubber, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[25]     5,085                
Cost [1],[4],[11],[25]     5,466                
Investment, Identifier [Axis]: Aptus 1829. GmbH, Chemicals, Plastics, and Rubber, Preferred Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6],[11]     110                
Cost [4],[6],[11]     120                
Investment, Identifier [Axis]: Apus Bidco Limited, Banking, Finance, Insurance & Real Estate, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     3,344 [1],[4],[11],[26] 3,823 [7],[8],[12],[27]              
Cost     3,886 [1],[4],[11],[26] 3,874 [7],[8],[12],[27]              
Investment, Identifier [Axis]: Aquavista Watersides 2 LTD, Bridge Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 503              
Investment, Identifier [Axis]: Aquavista Watersides 2 LTD, Capex / Acquisition Facility                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,543 3,147              
Investment, Identifier [Axis]: Aquavista Watersides 2 LTD, Transportation Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     5,263 [1],[4],[11],[26] 5,766 [7],[8],[12],[27]              
Cost     5,806 [1],[4],[11],[26] 5,696 [7],[8],[12],[27]              
Investment, Identifier [Axis]: Aquavista Watersides 2 LTD, Transportation Services, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[26]     198                
Cost [1],[4],[11],[26]     175                
Investment, Identifier [Axis]: Aquavista Watersides 2 LTD, Transportation Services, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[12],[27]       (5)              
Cost [7],[8],[12],[27]       (4)              
Investment, Identifier [Axis]: Aquavista Watersides 2 LTD, Transportation Services, Second Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,475 [1],[4],[11],[26] 1,465 [7],[8],[12],[27]              
Cost     1,617 [1],[4],[11],[26] 1,446 [7],[8],[12],[27]              
Investment, Identifier [Axis]: Arc Education, Consumer Cyclical, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[13]     2,969                
Cost [1],[4],[11],[13]     2,794                
Investment, Identifier [Axis]: Arc Education, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,900 0              
Investment, Identifier [Axis]: Arch Global Precision LLC, Industrial Machinery, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     9,094 [1],[4],[5] 9,248 [7],[8],[9]              
Cost     9,151 [1],[4],[5] 9,244 [7],[8],[9]              
Investment, Identifier [Axis]: Archimede, Consumer Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     6,164 [1],[4],[11],[13] 8,255 [7],[8],[12],[22]              
Cost     6,474 [1],[4],[11],[13] 8,761 [7],[8],[12],[22]              
Investment, Identifier [Axis]: Argus Bidco Limited, CAF Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     789 0              
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6],[11]     0                
Cost [4],[6],[11]     1                
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, Equity Loan Notes                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[11]     50                
Cost [4],[11]     51                
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value     126 [1],[4],[10],[11] 2,682 [7],[8],[12],[28]              
Cost     126 [1],[4],[10],[11] 2,559 [7],[8],[12],[28]              
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,536 [1],[4],[11],[23] 672 [7],[8],[9],[12]              
Cost     1,514 [1],[4],[11],[23] 653 [7],[8],[9],[12]              
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 3                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[13]     1,547                
Cost [1],[4],[11],[13]     1,502                
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, Preferred Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[11]     50                
Cost [4],[11]     51                
Investment, Identifier [Axis]: Argus Bidco Limited, High Tech Industries, Subordinated Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[11]     487                
Cost [4],[11]     480                
Investment, Identifier [Axis]: Argus Bidco Limited, RCF Bridge Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     168 0              
Investment, Identifier [Axis]: Armstrong Transport Group (Pele Buyer, LLC ), Air Freight & Logistics, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9]       3,939              
Cost [7],[8],[9]       3,961              
Investment, Identifier [Axis]: Armstrong Transport Group (Pele Buyer, LLC ), Air Freight & Logistics, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5]     3,896                
Cost [1],[4],[5]     3,950                
Investment, Identifier [Axis]: Armstrong Transport Group (Pele Buyer, LLC ), Air Freight & Logistics, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[16]     4,932                
Cost [1],[4],[16]     4,946                
Investment, Identifier [Axis]: Astra Bidco Limited, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     876 2,571              
Investment, Identifier [Axis]: Astra Bidco Limited, Healthcare, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,886 [1],[4],[11],[23] 5,535 [7],[8],[12],[28]              
Cost     2,103 [1],[4],[11],[23] 5,479 [7],[8],[12],[28]              
Investment, Identifier [Axis]: Auxi International, Commercial Finance, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,305 [1],[4],[11],[20] 1,439 [7],[8],[12],[29]              
Cost     1,526 [1],[4],[11],[20] 1,521 [7],[8],[12],[29]              
Investment, Identifier [Axis]: Auxi International, Commercial Finance, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value     704 [1],[4],[11],[23] 820 [7],[8],[12],[27]              
Cost     901 [1],[4],[11],[23] 897 [7],[8],[12],[27]              
Investment, Identifier [Axis]: Avance Clinical Bidco Pty Ltd, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,295 3,497              
Investment, Identifier [Axis]: Avance Clinical Bidco Pty Ltd, Healthcare, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,298 [1],[4],[11],[30] 6,158 [7],[8],[12],[31]              
Cost     2,417 [1],[4],[11],[30] 6,040 [7],[8],[12],[31]              
Investment, Identifier [Axis]: Aviation Technical Services, Inc., Aerospace & Defense, Second Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[4],[17]     27,794                
Cost [1],[2],[4],[17]     27,165                
Investment, Identifier [Axis]: Azalea Buyer, Inc., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     962 962              
Investment, Identifier [Axis]: Azalea Buyer, Inc., Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     481 481              
Investment, Identifier [Axis]: Azalea Buyer, Inc., Technology, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value     183 [4],[6] 192 [8]              
Cost     192 [4],[6] 192 [8]              
Investment, Identifier [Axis]: Azalea Buyer, Inc., Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,489 [1],[4],[5] 4,494 [8],[9]              
Cost     4,467 [1],[4],[5] 4,496 [8],[9]              
Investment, Identifier [Axis]: Azalea Buyer, Inc., Technology, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value     (6) [1],[4],[5] (10) [8],[9]              
Cost     (8) [1],[4],[5] (9) [8],[9]              
Investment, Identifier [Axis]: Azalea Buyer, Inc., Technology, Subordinated Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,403 [4] 1,234 [8]              
Cost     1,409 [4] 1,235 [8]              
Investment, Identifier [Axis]: BDP International, Inc. (f/k/a BDP Buyer, LLC), Air Freight & Logistics, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[15]       14,626              
Cost [7],[8],[15]       14,643              
Investment, Identifier [Axis]: BVI Medical, Inc., Healthcare, Second Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[13]     9,495                
Cost [1],[4],[13]     9,404                
Investment, Identifier [Axis]: Bariacum S.A, Acquisition Facility                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,028 2,161              
Investment, Identifier [Axis]: Bariacum S.A, Consumer Products, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[20]     5,944                
Cost [1],[4],[11],[20]     6,264                
Investment, Identifier [Axis]: Bariacum S.A., Consumer Products, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[12],[22]       6,244              
Cost [7],[8],[12],[22]       6,236              
Investment, Identifier [Axis]: Benify (Bennevis AB), High Tech Industries, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,060 [1],[4],[11],[32] 1,286 [7],[8],[12],[33]              
Cost     1,161 [1],[4],[11],[32] 1,222 [7],[8],[12],[33]              
Investment, Identifier [Axis]: Beyond Risk Management, Inc., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,423 2,573              
Investment, Identifier [Axis]: Beyond Risk Management, Inc., Other Financial, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,493 [1],[4],[17] 2,327 [7],[8],[9]              
Cost     2,499 [1],[4],[17] 2,336 [7],[8],[9]              
Investment, Identifier [Axis]: Bidwax, Non-durable Consumer Goods, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     7,254 [1],[4],[11],[20] 7,741 [7],[8],[12],[22]              
Cost     8,089 [1],[4],[11],[20] 8,062 [7],[8],[12],[22]              
Investment, Identifier [Axis]: BigHand UK Bidco Limited, Acquisition Facility                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 378              
Investment, Identifier [Axis]: BigHand UK Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[12],[34]       878              
Cost [7],[8],[12],[34]       880              
Investment, Identifier [Axis]: BigHand UK Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10],[11]     2,484                
Cost [1],[4],[10],[11]     2,476                
Investment, Identifier [Axis]: BigHand UK Bidco Limited, High Tech Industries, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[23]     792                
Cost [1],[4],[11],[23]     893                
Investment, Identifier [Axis]: Biolam Group, Consumer Non-cyclical, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[13]     2,939                
Cost [1],[4],[13]     2,956                
Investment, Identifier [Axis]: Biolam Group, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     4,783 0              
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     417 0              
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value     5,647 0              
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value     9,147 0              
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, Hotel, Gaming & Leisure, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[4],[17]     5,647                
Cost [1],[2],[4],[17]     5,647                
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, Hotel, Gaming & Leisure, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[3],[4]     9,147                
Cost [2],[3],[4]     9,628                
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, Hotel, Gaming & Leisure, LLC Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[4],[6]     0                
Cost [2],[4],[6]     0                
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, LLC Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     0 0              
Investment, Identifier [Axis]: Black Diamond Equipment Rentals LLC, Equipment Rental, Second Lien Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8],[35]       10,000              
Cost [8],[35]       10,000              
Investment, Identifier [Axis]: Black Diamond Equipment Rentals LLC, Equipment Rental, Warrants                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8],[35]       864              
Cost [8],[35]       1,010              
Investment, Identifier [Axis]: Bounteous, Inc., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,840 2,840              
Investment, Identifier [Axis]: Bounteous, Inc., Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,735 [1],[4],[5] 4,756 [7],[8],[9]              
Cost     1,816 [1],[4],[5] 4,752 [7],[8],[9]              
Investment, Identifier [Axis]: Bridger Aerospace Group Holdings, LLC, Environmental Industries, Municipal Revenue Bond                      
Summary of Investment Holdings [Line Items]                      
Fair Value     28,300                
Cost     27,200                
Investment, Identifier [Axis]: Bridger Aerospace Group Holdings, LLC, Environmental Industries, Preferred Stock- Series C                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4]     14,731                
Cost [4]     14,460                
Investment, Identifier [Axis]: BrightSign LLC, Media & Entertainment, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,724 [1],[4],[5] 12,683 [7],[8],[9]              
Cost     4,728 [1],[4],[5] 12,687 [7],[8],[9]              
Investment, Identifier [Axis]: BrightSign LLC, Media & Entertainment, LLC units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,152 [4],[6] 1,135 [8]              
Cost     1,108 [4],[6] 1,107 [8]              
Investment, Identifier [Axis]: BrightSign LLC, Media & Entertainment, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value     (12) [1],[4],[5] (13) [7],[8],[9]              
Cost     (11) [1],[4],[5] (13) [7],[8],[9]              
Investment, Identifier [Axis]: BrightSign LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,329 1,329              
Investment, Identifier [Axis]: Brightline Trains Florida LLC, Transportation, Senior Secured Note                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,350 [4] 5,005 [8]              
Cost     5,000 [4] 5,000 [8]              
Investment, Identifier [Axis]: Brightpay Limited, Delayed Draw Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 432              
Investment, Identifier [Axis]: Brightpay Limited, Delayed Draw Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     135 144              
Investment, Identifier [Axis]: Brightpay Limited, Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,156 [1],[4],[11],[13] 1,862 [7],[8],[12],[22]              
Cost     2,296 [1],[4],[11],[13] 1,883 [7],[8],[12],[22]              
Investment, Identifier [Axis]: British Airways 2020-1 Class B Pass Through Trust, Airlines, Structured Secured Note - Class B                      
Summary of Investment Holdings [Line Items]                      
Fair Value     692 916              
Cost     703 810              
Investment, Identifier [Axis]: British Engineering Services Holdco Limited, Bridge Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 613              
Investment, Identifier [Axis]: British Engineering Services Holdco Limited, Commercial Services & Supplies, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     13,454 [1],[4],[11],[23] 15,406 [7],[8],[12],[27]              
Cost     15,133 [1],[4],[11],[23] 15,081 [7],[8],[12],[27]              
Investment, Identifier [Axis]: British Engineering Services Holdco Limited, Commercial Services & Supplies, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[12],[27]       (5)              
Cost [7],[8],[12],[27]       (2)              
Investment, Identifier [Axis]: Brook & Whittle Holding Corp., Containers, Packaging & Glass, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[10]     2,478                
Cost [1],[2],[10]     2,807                
Investment, Identifier [Axis]: Brown Machine Group Holdings, LLC, Industrial Equipment, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     6,281 [1],[4],[5] 6,634 [7],[8],[15]              
Cost     6,252 [1],[4],[5] 6,587 [7],[8],[15]              
Investment, Identifier [Axis]: Burgess Point Purchaser Corporation, Auto Parts & Equipment, LP Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6]     446                
Cost [4],[6]     455                
Investment, Identifier [Axis]: Burgess Point Purchaser Corporation, Auto Parts & Equipment, Second Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[21]     4,390                
Cost [1],[4],[21]     4,370                
Investment, Identifier [Axis]: CATAWBA RIVER LIMITED, Finance Companies, Structured - Junior Note                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[11]     5,239                
Cost [4],[11]     4,893                
Investment, Identifier [Axis]: CAi Software, LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     943 943              
Investment, Identifier [Axis]: CAi Software, LLC, Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9]       8,876              
Cost [7],[8],[9]       8,877              
Investment, Identifier [Axis]: CAi Software, LLC, Technology, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5]     1,341                
Cost [1],[4],[5]     1,352                
Investment, Identifier [Axis]: CAi Software, LLC, Technology, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5]     4,879                
Cost [1],[4],[5]     4,921                
Investment, Identifier [Axis]: CAi Software, LLC, Technology, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value     (24) [1],[4],[5] (19)              
Cost     (16) [1],[4],[5] (19)              
Investment, Identifier [Axis]: CGI Parent, LLC, Business Equipment & Services, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[17]     10,377                
Cost [1],[4],[17]     10,510                
Investment, Identifier [Axis]: CGI Parent, LLC, Business Equipment & Services, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     1,344                
Cost [1],[4],[10]     1,344                
Investment, Identifier [Axis]: CGI Parent, LLC, Business Equipment & Services, Preferred Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6]     1,027                
Cost [4],[6]     551                
Investment, Identifier [Axis]: CGI Parent, LLC, Business Equipment & Services, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[17]     (49)                
Cost [1],[4],[17]     (29)                
Investment, Identifier [Axis]: CGI Parent, LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,653 0              
Investment, Identifier [Axis]: CM Acquisitions Holdings Inc., Internet & Direct Marketing, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9]       19,106              
Cost [7],[8],[9]       18,897              
Investment, Identifier [Axis]: CM Acquisitions Holdings Inc., Internet & Direct Marketing, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     18,060                
Cost [1],[4],[10]     18,761                
Investment, Identifier [Axis]: CMT Opco Holding, LLC (Concept Machine), Distributors, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     3,928 [1],[4],[5] 3,999 [7],[8],[9]              
Cost     4,076 [1],[4],[5] 4,090 [7],[8],[9]              
Investment, Identifier [Axis]: CMT Opco Holding, LLC (Concept Machine), Distributors, LLC Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     165 [4] 227 [8]              
Cost     352 [4] 352 [8]              
Investment, Identifier [Axis]: CSL DualCom, Tele-communications, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,921 [1],[4],[11],[36] 1,301 [7],[8],[12],[34]              
Cost     1,905 [1],[4],[11],[36] 1,203 [7],[8],[12],[34]              
Investment, Identifier [Axis]: CSL Dualcom, Capex / Acquisition Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     142 998              
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc., Healthcare, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[17]     4,505                
Cost [1],[2],[17]     4,930                
Investment, Identifier [Axis]: CVL 3, Capital Equipment, 6-Month Bridge Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[12],[22]       788              
Cost [7],[8],[12],[22]       772              
Investment, Identifier [Axis]: CVL 3, Capital Equipment, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value     891 [1],[4],[11],[13] 5,766 [7],[8],[12],[22]              
Cost     938 [1],[4],[11],[13] 5,724 [7],[8],[12],[22]              
Investment, Identifier [Axis]: CVL 3, Capital Equipment, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,122 [1],[4],[10],[11] 3,298 [7],[8],[12],[37]              
Cost     1,117 [1],[4],[10],[11] 3,298 [7],[8],[12],[37]              
Investment, Identifier [Axis]: CW Group Holdings, LLC, High Tech Industries, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9]       2,774              
Cost [7],[8],[9]       2,762              
Investment, Identifier [Axis]: CW Group Holdings, LLC, High Tech Industries, LLC Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     204 [4],[6] 112 [8]              
Cost     161 [4],[6] 161 [8]              
Investment, Identifier [Axis]: CW Group Holdings, LLC, High Tech Industries,First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[17]     2,766                
Cost [1],[4],[17]     2,744                
Investment, Identifier [Axis]: Cadent, LLC (f/k/a Cross MediaWorks), Media & Entertainment, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[15]       6,913              
Cost [7],[8],[15]       6,888              
Investment, Identifier [Axis]: Cadent, LLC (f/k/a Cross MediaWorks), Media & Entertainment, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5]     6,580                
Cost [1],[4],[5]     6,741                
Investment, Identifier [Axis]: Cadent, LLC (f/k/a Cross MediaWorks), Media & Entertainment, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5]     11,080                
Cost [1],[4],[5]     11,161                
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     110 167              
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Healthcare, Class A Equity                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6],[11]     292                
Cost [4],[6],[11]     389                
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Healthcare, Class C - Warrants                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6],[11]     0                
Cost [4],[6],[11]     0                
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Healthcare, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,468 [1],[4],[11],[38] 1,625 [7],[8],[12],[39]              
Cost     1,729 [1],[4],[11],[38] 1,697 [7],[8],[12],[39]              
Investment, Identifier [Axis]: Caribou Holding Company, LLC, Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10],[11]     4,269                
Cost [1],[4],[10],[11]     4,261                
Investment, Identifier [Axis]: Caribou Holding Company, LLC, Technology, LLC Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6],[11]     627                
Cost [4],[6],[11]     682                
Investment, Identifier [Axis]: Carlson Travel, Inc, Business Travel Management, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,339 [6] 3,084              
Cost     4,194 [6] 1,655              
Investment, Identifier [Axis]: Carlson Travel, Inc, Business Travel Management, First Lien Senior Secured Note                      
Summary of Investment Holdings [Line Items]                      
Fair Value     5,113 6,161              
Cost     5,720 5,654              
Investment, Identifier [Axis]: Catawba River Limited, Structured Junior Note                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     12,635 0              
Investment, Identifier [Axis]: Centralis Finco S.a.r.l., Diversified Financial Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[12],[22]       807              
Cost [7],[8],[12],[22]       739              
Investment, Identifier [Axis]: Centralis Finco S.a.r.l., Diversified Financial Services, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[13]     820                
Cost [1],[4],[11],[13]     768                
Investment, Identifier [Axis]: Centralis Finco S.a.r.l., Diversified Financial Services, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[13]     1,158                
Cost [1],[4],[11],[13]     1,151                
Investment, Identifier [Axis]: Centralis Finco S.a.r.l., Incremental CAF Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,028 461              
Investment, Identifier [Axis]: Ceres Pharma NV, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 2,149              
Investment, Identifier [Axis]: Ceres Pharma NV, Pharma-ceuticals, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[20]     3,139                
Cost [1],[4],[11],[20]     3,264                
Investment, Identifier [Axis]: Ceres Pharma NV, Pharmaceuticals, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[12],[29]       4,355              
Cost [7],[8],[12],[29]       4,444              
Investment, Identifier [Axis]: Charming Charlie LLC, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value     0 0              
Investment, Identifier [Axis]: Charming Charlie LLC, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value     0 0              
Investment, Identifier [Axis]: Charming Charlie LLC, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value     0 0              
Investment, Identifier [Axis]: Charming Charlie LLC, First Lien Senior Secured Term Loan 3                      
Summary of Investment Holdings [Line Items]                      
Fair Value     0 0              
Investment, Identifier [Axis]: Charming Charlie LLC, First Lien Senior Secured Term Loan 4                      
Summary of Investment Holdings [Line Items]                      
Fair Value     0 0              
Investment, Identifier [Axis]: Cineworld Group PLC, Leisure Products, Super Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [12]       2,128              
Cost [12]       1,591              
Investment, Identifier [Axis]: Cineworld Group PLC, Leisure Products, Super Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[12],[19]       1,054              
Cost [7],[12],[19]       961              
Investment, Identifier [Axis]: Cineworld Group PLC, Leisure Products, Warrants                      
Summary of Investment Holdings [Line Items]                      
Fair Value     0 [4],[6],[11] 244 [12]              
Cost     102 [4],[6],[11] 102 [12]              
Investment, Identifier [Axis]: Classic Collision (Summit Buyer, LLC), Auto Collision Repair Centers, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9]       12,448              
Cost [7],[8],[9]       12,384              
Investment, Identifier [Axis]: Classic Collision (Summit Buyer, LLC), Auto Collision Repair Centers, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[17]     6,189                
Cost [1],[4],[17]     6,182                
Investment, Identifier [Axis]: Classic Collision (Summit Buyer, LLC), Auto Collision Repair Centers,First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[17]     523                
Cost [1],[4],[17]     522                
Investment, Identifier [Axis]: Classic Collision (Summit Buyer, LLC), Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     78 393              
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Other Financial, LLC Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     10,729 [4],[6] 1,643 [8]              
Cost     9,093 [4],[6] 1,643 [8]              
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Other Financial, Subordinated Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8]       15,966              
Cost [8]       15,965              
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Other Financial, Subordinated Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4]     6,036                
Cost [4]     6,054                
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Other Financial, Subordinated Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4]     15,528                
Cost [4]     15,509                
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, PIK Tranche B Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 1,311              
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Tranche A Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 3,576              
Investment, Identifier [Axis]: Cobham Slip Rings SAS, Diversified Manufacturing, Diversified Manufacturing                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5],[11]     1,270                
Cost [1],[4],[5],[11]     1,276                
Investment, Identifier [Axis]: Cobham Slip Rings SAS, Diversified Manufacturing, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9],[12]       4,196              
Cost [7],[8],[9],[12]       4,199              
Investment, Identifier [Axis]: Command Alkon (Project Potter Buyer, LLC), Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 6,018              
Investment, Identifier [Axis]: Command Alkon (Project Potter Buyer, LLC), Software, , First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[15]       13,658              
Cost [7],[8],[15]       13,290              
Investment, Identifier [Axis]: Command Alkon (Project Potter Buyer, LLC), Software, Class A Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8]       101              
Cost [8]       90              
Investment, Identifier [Axis]: Command Alkon (Project Potter Buyer, LLC), Software, Class B Partnership Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6]     196                
Cost [4],[6]     0                
Investment, Identifier [Axis]: Command Alkon (Project Potter Buyer, LLC), Software, Class B Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8]       186              
Cost [8]       0              
Investment, Identifier [Axis]: Command Alkon (Project Potter Buyer, LLC), Software, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[21]     13,302                
Cost [1],[4],[21]     13,316                
Investment, Identifier [Axis]: Compass Precision, LLC, Aerospace & Defense, LLC Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6]     159                
Cost [4],[6]     125                
Investment, Identifier [Axis]: Compass Precision, LLC, Aerospace & Defense, Senior Subordinated Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4]     369                
Cost [4]     371                
Investment, Identifier [Axis]: Comply365, LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     935 0              
Investment, Identifier [Axis]: Comply365, LLC, Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[16]     13,446                
Cost [1],[4],[16]     13,407                
Investment, Identifier [Axis]: Comply365, LLC, Technology, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[16]     148                
Cost [1],[4],[16]     146                
Investment, Identifier [Axis]: Contabo Finco S.À R.L, Internet Software & Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,845 [1],[4],[11],[13] 5,830 [7],[8],[12],[28]              
Cost     4,524 [1],[4],[11],[13] 5,819 [7],[8],[12],[28]              
Investment, Identifier [Axis]: Core Scientific, Inc., Technology, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [6]     7                
Cost [6]     296                
Investment, Identifier [Axis]: Core Scientific, Inc., Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [3],[4]     11,118                
Cost [3],[4]     29,619                
Investment, Identifier [Axis]: Coyo Uprising GmbH, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     419 894              
Investment, Identifier [Axis]: Coyo Uprising GmbH, Technology, Class A Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     196 [4],[6],[11] 587 [8],[12]              
Cost     205 [4],[6],[11] 205 [8],[12]              
Investment, Identifier [Axis]: Coyo Uprising GmbH, Technology, Class B Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     497 [4],[6],[11] 252 [8],[12]              
Cost     446 [4],[6],[11] 446 [8],[12]              
Investment, Identifier [Axis]: Coyo Uprising GmbH, Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,233 [1],[4],[11],[20] 3,938 [7],[8],[12],[22]              
Cost     4,638 [1],[4],[11],[20] 4,050 [7],[8],[12],[22]              
Investment, Identifier [Axis]: Crash Champions, Automotive, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9]       13,968              
Cost [7],[8],[9]       14,040              
Investment, Identifier [Axis]: Crash Champions, LLC, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 5,420              
Investment, Identifier [Axis]: Custom Alloy Corporation, Manufacturer of Pipe Fittings & Forgings, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value     189 [3],[4],[40] 2,596 [8],[35],[41]              
Cost     4,222 [3],[4],[40] 3,738 [8],[35],[41]              
Investment, Identifier [Axis]: Custom Alloy Corporation, Manufacturer of Pipe Fittings & Forgings, Second Lien Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,997 [3],[4],[40] 27,450 [8],[35],[41]              
Cost     42,162 [3],[4],[40] 37,043 [8],[35],[41]              
Investment, Identifier [Axis]: DISA Holdings Corp., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,368 0              
Investment, Identifier [Axis]: DISA Holdings Corp., Other Industrial, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[21]     5,491                
Cost [1],[4],[21]     5,496                
Investment, Identifier [Axis]: DISA Holdings Corp., Other Industrial, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[21]     0                
Cost [1],[4],[21]     0                
Investment, Identifier [Axis]: DISA Holdings Corp., Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     416 0              
Investment, Identifier [Axis]: Dart Buyer, Inc., Aerospace & Defense, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9],[12]       11,734              
Cost [7],[8],[9],[12]       12,047              
Investment, Identifier [Axis]: Dart Buyer, Inc., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 2,431              
Investment, Identifier [Axis]: DataOnline Corp., High Tech Industries, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[4],[5]     14,259                
Cost [1],[2],[4],[5]     14,550                
Investment, Identifier [Axis]: DataOnline Corp., High Tech Industries, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[4],[5]     2,100                
Cost [1],[2],[4],[5]     2,143                
Investment, Identifier [Axis]: DataServ Integrations, LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     481 0              
Investment, Identifier [Axis]: DataServ Integrations, LLC, Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     1,875                
Cost [1],[4],[10]     1,876                
Investment, Identifier [Axis]: DataServ Integrations, LLC, Technology, Partnership Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6]     96                
Cost [4],[6]     96                
Investment, Identifier [Axis]: DataServ Integrations, LLC, Technology, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     (11)                
Cost [1],[4],[10]     (10)                
Investment, Identifier [Axis]: DecksDirect, LLC, Building Materials, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6]     48                
Cost [4],[6]     55                
Investment, Identifier [Axis]: DecksDirect, LLC, Building Materials, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     690 [1],[4],[17] 713 [7],[8],[15]              
Cost     688 [1],[4],[17] 713 [7],[8],[15]              
Investment, Identifier [Axis]: DecksDirect, LLC, Building Materials, LLC Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8]       55              
Cost [8]       55              
Investment, Identifier [Axis]: DecksDirect, LLC, Building Materials, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value     (3) [1],[4],[17] (4) [7],[8],[9]              
Cost     (3) [1],[4],[17] (4) [7],[8],[9]              
Investment, Identifier [Axis]: DecksDirect, LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     218 218              
Investment, Identifier [Axis]: Discovery Education, Inc., Publishing, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9]       11,815              
Cost [7],[8],[9]       11,626              
Investment, Identifier [Axis]: Distinct Holdings, Inc., Systems Software, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     6,096 [1],[4],[5] 6,715 [7],[8],[15]              
Cost     6,860 [1],[4],[5] 6,841 [7],[8],[15]              
Investment, Identifier [Axis]: Dragon Bidco, Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[12],[29]       2,676              
Cost [7],[8],[12],[29]       2,812              
Investment, Identifier [Axis]: Dragon Bidco, Technology, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[13]     2,515                
Cost [1],[4],[11],[13]     2,828                
Investment, Identifier [Axis]: Dragon Bidco, Technology, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[20]     1,153                
Cost [1],[4],[11],[20]     1,170                
Investment, Identifier [Axis]: DreamStart Bidco SAS (d/b/a SmartTrade), Acquisition Facility                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     579 617              
Investment, Identifier [Axis]: DreamStart Bidco SAS (d/b/a SmartTrade), Diversified Financial Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,247 [1],[4],[11],[13] 2,385 [7],[8],[12],[29]              
Cost     2,305 [1],[4],[11],[13] 2,295 [7],[8],[12],[29]              
Investment, Identifier [Axis]: Dryden 43 Senior Loan Fund, Series 2016-43A, Multi-Sector Holdings, Subordinated Structured Notes                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[11]     2,084                
Cost [2],[11]     2,329                
Investment, Identifier [Axis]: Dryden 49 Senior Loan Fund, Series 2017-49A, Multi-Sector Holdings, Subordinated Structured Notes                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[11]     4,267                
Cost [2],[11]     6,790                
Investment, Identifier [Axis]: Dune Group, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     624 665              
Investment, Identifier [Axis]: Dune Group, Health Care Equipment, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value     111 [1],[4],[11],[13] 1,202 [7],[8],[9],[12]              
Cost     109 [1],[4],[11],[13] 1,205 [7],[8],[9],[12]              
Investment, Identifier [Axis]: Dune Group, Health Care Equipment, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,209 [1],[4],[5],[11] 113 [7],[8],[12],[22]              
Cost     1,212 [1],[4],[5],[11] 105 [7],[8],[12],[22]              
Investment, Identifier [Axis]: Dunlipharder B.V., Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10],[11]     988                
Cost [1],[4],[10],[11]     986                
Investment, Identifier [Axis]: Dwyer Instruments, Inc., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     5,164 692              
Investment, Identifier [Axis]: Dwyer Instruments, Inc., Electric, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9]       4,516              
Cost [7],[8],[9]       4,452              
Investment, Identifier [Axis]: Dwyer Instruments, Inc., Electric, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5]     25,287                
Cost [1],[4],[5]     25,257                
Investment, Identifier [Axis]: EMI Porta Holdco LLC, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     9,272 12,458              
Investment, Identifier [Axis]: EMI Porta Holdco LLC, Diversified Manufacturing, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     12,008 [1],[4],[5] 9,136 [7],[8],[9]              
Cost     12,272 [1],[4],[5] 9,141 [7],[8],[9]              
Investment, Identifier [Axis]: EMI Porta Holdco LLC, Diversified Manufacturing, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,409 [1],[4],[5] (59) [7],[8],[9]              
Cost     1,446 [1],[4],[5] (59) [7],[8],[9]              
Investment, Identifier [Axis]: EMI Porta Holdco LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,471 2,966              
Investment, Identifier [Axis]: EPS NASS Parent, Inc., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     257 583              
Investment, Identifier [Axis]: EPS NASS Parent, Inc., Electrical Components & Equipment, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     6,024 [1],[4],[5] 5,715 [7],[8],[9]              
Cost     5,978 [1],[4],[5] 5,695 [7],[8],[9]              
Investment, Identifier [Axis]: Echo Global Logistics, Inc., Air Transportation, Partnership Equity                      
Summary of Investment Holdings [Line Items]                      
Fair Value     933 [4],[6] 531 [8]              
Cost     531 [4],[6] 531 [8]              
Investment, Identifier [Axis]: Echo Global Logistics, Inc., Air Transportation, Second Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     9,100 [1],[4],[5] 14,216 [7],[8],[9]              
Cost     9,320 [1],[4],[5] 14,210 [7],[8],[9]              
Investment, Identifier [Axis]: Eclipse Business Capital Holdings LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value               $ 4,500      
Investment, Identifier [Axis]: Eclipse Business Capital Holdings LLC, Second Lien Senior Secured Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value               89,800      
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Banking, Finance, Insurance & Real Estate, LLC Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4]     135,066                
Cost [4]     93,230                
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Banking, Finance, Insurance & Real Estate, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[17]     5,273                
Cost [4],[17]     5,165                
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Banking, Finance, Insurance & Real Estate, Second Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4]     4,545                
Cost [4]     4,508                
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Banking, Finance, Insurance, & Real Estate, LLC Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8],[42]       92,668              
Cost [8],[42]       89,850              
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Banking, Finance, Insurance, & Real Estate, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8],[9],[42]       1,818              
Cost [8],[9],[42]       1,691              
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Banking, Finance, Insurance, & Real Estate, Second Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8],[42]       4,738              
Cost [8],[42]       4,502              
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, LLC units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     135,066 92,668 0            
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     17,455 11,818              
Fair Value     5,273 1,818 0            
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Second Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,545 4,738 0            
Investment, Identifier [Axis]: Ellkay, LLC, Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9]       4,898              
Cost [7],[8],[9]       4,892              
Investment, Identifier [Axis]: Ellkay, LLC, Healthcare and Pharmaceuticals, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5]     4,893                
Cost [1],[4],[5]     4,868                
Investment, Identifier [Axis]: Entact Environmental Services, Inc., Environmental Industries, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     5,529 [1],[4],[5] 5,631 [7],[8],[9]              
Cost     5,511 [1],[4],[5] 5,657 [7],[8],[9]              
Investment, Identifier [Axis]: Eshipping, LLC, Transportation Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[15]       5,795              
Cost [7],[8],[15]       5,799              
Investment, Identifier [Axis]: Eshipping, LLC, Transportation Services, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9]       225              
Cost [7],[8],[9]       226              
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,639 0              
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Delayed Draw Term Loan1                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     528 0              
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Technology, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[13]     1,352                
Cost [1],[4],[11],[13]     1,338                
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Technology, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10],[11]     745                
Cost [1],[4],[10],[11]     745                
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Technology, First Lien Senior Secured Term Loan 3                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[23]     2,111                
Cost [1],[4],[11],[23]     2,158                
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Technology, First Lien Senior Secured Term Loan 4                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[11]     513                
Cost [4],[11]     507                
Investment, Identifier [Axis]: Events Software BidCo Pty Ltd, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     640 0              
Investment, Identifier [Axis]: Events Software BidCo Pty Ltd, Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[43]     1,573                
Cost [1],[4],[11],[43]     1,853                
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Consumer Cyclical, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[21]     7,106                
Cost [1],[4],[21]     7,092                
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Consumer Cyclical, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[21]     137                
Cost [1],[4],[21]     136                
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     115 0              
Investment, Identifier [Axis]: F24 (Stairway BidCo GmbH), Acquisition Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     246 405              
Investment, Identifier [Axis]: F24 (Stairway BidCo Gmbh), Software Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,644 [1],[4],[11],[13] 1,621 [7],[8],[12],[22]              
Cost     1,792 [1],[4],[11],[13] 1,649 [7],[8],[12],[22]              
Investment, Identifier [Axis]: FSS Buyer LLC, Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     6,767 [1],[4],[17] 6,790 [7],[8],[9]              
Cost     6,728 [1],[4],[17] 6,773 [7],[8],[9]              
Investment, Identifier [Axis]: FSS Buyer LLC, Technology, LP Interest                      
Summary of Investment Holdings [Line Items]                      
Fair Value     17 [4],[6] 30 [8]              
Cost     12 [4],[6] 12 [8]              
Investment, Identifier [Axis]: FSS Buyer LLC, Technology, LP Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     75 [4],[6] 132 [8]              
Cost     51 [4],[6] 51 [8]              
Investment, Identifier [Axis]: Ferrellgas L.P., Oil & Gas Equipment & Services, OpCo Preferred Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8],[12]       3,146              
Cost [8],[12]       2,799              
Investment, Identifier [Axis]: Ferrellgas L.P., Oil & Gas Equipment & Services, Opco Preferred Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4]     2,742                
Cost [4]     2,799                
Investment, Identifier [Axis]: FinThrive Software Intermediate Holdings Inc., Business Equipment & Services, Preferred Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4]     6,084                
Cost [4]     7,892                
Investment, Identifier [Axis]: Fineline Technologies, Inc., Consumer Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,270 [1],[4],[5] 1,306 [7],[8],[9]              
Cost     1,274 [1],[4],[5] 1,283 [7],[8],[9]              
Investment, Identifier [Axis]: Fineline Technologies, Inc., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     180 180              
Investment, Identifier [Axis]: Finexvet, Consumer Cyclical, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[20]     2,329                
Cost [1],[4],[11],[20]     2,379                
Investment, Identifier [Axis]: FitzMark Buyer, LLC, Cargo & Transportation, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,165 [1],[4],[5] 4,184 [7],[8],[9]              
Cost     4,164 [1],[4],[5] 4,197 [7],[8],[9]              
Investment, Identifier [Axis]: Five Star Holding LLC, Packaging, LLC Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6]     962                
Cost [4],[6]     967                
Investment, Identifier [Axis]: Five Star Holding LLC, Packaging, Second Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     13,295                
Cost [1],[4],[10]     13,434                
Investment, Identifier [Axis]: Flexential Issuer, LLC, Information Technology, Structured Secured Note - Class C                      
Summary of Investment Holdings [Line Items]                      
Fair Value     13,827 15,609              
Cost     14,839 14,817              
Investment, Identifier [Axis]: Flywheel Re Segregated Portfolio 2022-4, Investment Funds, Preferred Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6],[11]     1,932                
Cost [4],[6],[11]     1,922                
Investment, Identifier [Axis]: Footco 40 Limited, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     766 0              
Investment, Identifier [Axis]: Footco 40 Limited, Media & Entertainment, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[23]     1,437                
Cost [1],[4],[11],[23]     1,561                
Investment, Identifier [Axis]: Fortis Payment Systems, LLC, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     925 0              
Investment, Identifier [Axis]: Fortis Payment Systems, LLC, Other Financial, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[21]     1,513                
Cost [1],[4],[21]     1,516                
Investment, Identifier [Axis]: FragilePak LLC, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,354 2,354              
Investment, Identifier [Axis]: FragilePak LLC, Transportation Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,638 [1],[4],[5] 4,541 [7],[8],[15]              
Cost     4,491 [1],[4],[5] 4,519 [7],[8],[15]              
Investment, Identifier [Axis]: FragilePak LLC, Transportation Services, Partnership Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,179 [4],[6] 926              
Cost     938 [4],[6] 938              
Investment, Identifier [Axis]: Front Line Power Construction LLC, Construction Machinery, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value     158 [6] 111              
Cost     320 [6] 130              
Investment, Identifier [Axis]: Front Line Power Construction LLC, Construction Machinery, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,871 [1],[4],[5] 3,880 [7],[8],[9]              
Cost     4,089 [1],[4],[5] 3,872 [7],[8],[9]              
Investment, Identifier [Axis]: GB EAGLE BUYER, INC., Capital Goods, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     16,271                
Cost [1],[4],[10]     16,276                
Investment, Identifier [Axis]: GB EAGLE BUYER, INC., Capital Goods, Partnership Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6]     687                
Cost [4],[6]     687                
Investment, Identifier [Axis]: GB EAGLE BUYER, INC., Capital Goods, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     (77)                
Cost [1],[4],[10]     (76)                
Investment, Identifier [Axis]: GB EAGLE BUYER, INC., Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,581 0              
Investment, Identifier [Axis]: GPZN II GmbH, CAF Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     560 0              
Investment, Identifier [Axis]: GPZN II GmbH, Healthcare, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[25]     375                
Cost [1],[4],[11],[25]     429                
Investment, Identifier [Axis]: GROUPE PRODUCT LIFE, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     441 0              
Investment, Identifier [Axis]: GTM Intermediate Holdings, Inc., Medical Equipment Manufacturer, Second Lien Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     10,442 [4],[40] 11,500 [8],[35]              
Cost     10,587 [4],[40] 11,449 [8],[35]              
Investment, Identifier [Axis]: GTM Intermediate Holdings, Inc., Medical Equipment Manufacturer, Series A Preferred Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,252 [4],[6],[40] 2,290 [8],[35]              
Cost     2,166 [4],[6],[40] 2,166 [8],[35]              
Investment, Identifier [Axis]: GTM Intermediate Holdings, Inc., Medical Equipment Manufacturer, Series C Preferred Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,158 [4],[6],[40] 1,184 [8],[35]              
Cost     1,081 [4],[6],[40] 1,081 [8],[35]              
Investment, Identifier [Axis]: Global Academic Group Limited, Industrial Other, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[43]     2,438                
Cost [1],[4],[11],[43]     2,502                
Investment, Identifier [Axis]: Global Academic Group Limited, Industrial Other, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[44]     4,242                
Cost [1],[4],[11],[44]     4,202                
Investment, Identifier [Axis]: Global Academic Group Limited, Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     451 0              
Investment, Identifier [Axis]: Greenhill BV, Capex Acquisition Facility                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     255 0              
Investment, Identifier [Axis]: Greenhill II BV, Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[13]     716                
Cost [1],[4],[11],[13]     672                
Investment, Identifier [Axis]: Groupe Product Life, Consumer Non-cyclical, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[13]     598                
Cost [1],[4],[11],[13]     553                
Investment, Identifier [Axis]: Gulf Finance, LLC, Oil & Gas Exploration & Production, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     772 [1],[17] 774 [7],[15]              
Cost     797 [1],[17] 799 [7],[15]              
Investment, Identifier [Axis]: Gusto Aus BidCo Pty Ltd, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     223 0              
Investment, Identifier [Axis]: Gusto Aus BidCo Pty Ltd., Consumer Non-Cyclical, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[30]     2,136                
Cost [1],[4],[30]     2,016                
Investment, Identifier [Axis]: HEKA INVEST, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     555 0              
Investment, Identifier [Axis]: HEKA Invest, Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[13]     4,846                
Cost [1],[4],[11],[13]     4,461                
Investment, Identifier [Axis]: HTI Technology & Industries, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,045 0              
Investment, Identifier [Axis]: HTI Technology & Industries, Electronic Component Manufacturing, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     (18)                
Cost [1],[4],[10]     (18)                
Investment, Identifier [Axis]: HTI Technology & Industries, Electronic Component Manufacturing, Second Lien Note                      
Summary of Investment Holdings [Line Items]                      
Fair Value     11,363 [1],[4],[10] 22,215 [8],[35]              
Cost     11,361 [1],[4],[10] 22,096 [8],[35]              
Investment, Identifier [Axis]: HTI Technology & Industries, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,364 0              
Investment, Identifier [Axis]: HW Holdco, LLC (Hanley Wood LLC), Advertising, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[15]       13,137              
Cost [7],[8],[15]       13,189              
Investment, Identifier [Axis]: HW Holdco, LLC (Hanley Wood LLC), Advertising, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5]     4,928                
Cost [1],[4],[5]     4,946                
Investment, Identifier [Axis]: HW Holdco, LLC (Hanley Wood LLC), Advertising, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[17]     5,834                
Cost [1],[4],[17]     5,832                
Investment, Identifier [Axis]: HW Holdco, LLC (Hanley Wood LLC), Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     913 1,563              
Investment, Identifier [Axis]: Hawaiian Airlines 2020-1 Class B Pass Through Certificates, Airlines, Structured Secured Note - Class B                      
Summary of Investment Holdings [Line Items]                      
Fair Value       7,213              
Cost       6,093              
Investment, Identifier [Axis]: HeartHealth Bidco Pty Ltd, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     313 0              
Investment, Identifier [Axis]: HeartHealth Bidco Pty Ltd, Healthcare, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[11],[43]     598                
Cost [4],[11],[43]     569                
Investment, Identifier [Axis]: Heartland Veterinary Partners, LLC, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     267 657              
Investment, Identifier [Axis]: Heartland Veterinary Partners, LLC, Healthcare, Subordinated Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8]       9,093              
Cost [8]       9,096              
Investment, Identifier [Axis]: Heartland Veterinary Partners, LLC, Healthcare, Subordinated Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4]     1,151                
Cost [4]     1,161                
Investment, Identifier [Axis]: Heartland Veterinary Partners, LLC, Healthcare, Subordinated Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4]     9,183                
Cost [4]     9,238                
Investment, Identifier [Axis]: Heartland, LLC, Business Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     13,795 [1],[4],[5] 13,794 [7],[8],[9]              
Cost     13,884 [1],[4],[5] 13,976 [7],[8],[9]              
Investment, Identifier [Axis]: Heavy Construction Systems Specialists, LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,632 2,632              
Investment, Identifier [Axis]: Heavy Construction Systems Specialists, LLC, Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     7,276 [1],[4],[17] 7,221 [7],[8],[9]              
Cost     7,244 [1],[4],[17] 7,199 [7],[8],[9]              
Investment, Identifier [Axis]: Heavy Construction Systems Specialists, LLC, Technology, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value     (33) [1],[4],[17] (53) [7],[8],[9]              
Cost     (43) [1],[4],[17] (54) [7],[8],[9]              
Investment, Identifier [Axis]: Heilbron (f/k/a Sucsez (Bolt Bidco B.V.)), Insurance, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     3,148 [1],[4],[11],[13] 8,612 [7],[8],[12],[29]              
Cost     3,676 [1],[4],[11],[13] 9,380 [7],[8],[12],[29]              
Investment, Identifier [Axis]: Highpoint Global LLC, Government Services, Second Lien Note                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8],[35]       5,416              
Cost [8],[35]       5,395              
Investment, Identifier [Axis]: Holland Acquisition Corp., Energy: Oil & Gas, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[3],[4],[18]     0                
Cost [1],[2],[3],[4],[18]     0                
Investment, Identifier [Axis]: Home Care Assistance, LLC, Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     3,621 [1],[4],[21] 3,753 [7],[8],[9]              
Cost     3,736 [1],[4],[21] 3,762 [7],[8],[9]              
Investment, Identifier [Axis]: Honour Lane Logistics Holdings Limited, Transportation Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[16]     7,814                
Cost [1],[4],[11],[16]     7,781                
Investment, Identifier [Axis]: Hygie 31 Holding, Pharma-ceuticals, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[13]     1,665                
Cost [1],[4],[11],[13]     1,498                
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,496 0              
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, Construction & Building, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6]     4,496                
Cost [4],[6]     5,219                
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, Construction & Building, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     3,917                
Cost [1],[4],[10]     3,670                
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, Construction & Building, Second Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     4,098                
Cost [1],[4],[10]     4,098                
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value     3,917 0              
Investment, Identifier [Axis]: Hylan Datacom & Electrical LLC, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,098 0              
Investment, Identifier [Axis]: IGL Holdings III Corp., Commercial Printing. First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9]       4,268              
Cost [7],[8],[9]       4,231              
Investment, Identifier [Axis]: IGL Holdings III Corp., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 1,217              
Investment, Identifier [Axis]: IM Analytics Holding, LLC (d/b/a NVT), Electronic Instruments & Components, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     3,247 [1],[4],[17] 6,603 [7],[8],[9]              
Cost     3,388 [1],[4],[17] 8,085 [7],[8],[9]              
Investment, Identifier [Axis]: IM Analytics Holding, LLC (d/b/a NVT), Electronic Instruments & Components, Warrants                      
Summary of Investment Holdings [Line Items]                      
Fair Value     0 [4],[6] 0 [7],[8]              
Cost     0 [4],[6] 0 [7],[8]              
Investment, Identifier [Axis]: IM Square, Banking, Finance, Insurance & Real Estate, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,583 [1],[4],[11],[13] 6,938 [7],[8],[12],[29]              
Cost     2,938 [1],[4],[11],[13] 7,232 [7],[8],[12],[29]              
Investment, Identifier [Axis]: INOS 19-090 GmbH, Acquisition Facility                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,380 2,535              
Investment, Identifier [Axis]: INOS 19-090 GmbH, Aerospace & Defense, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,892 [1],[4],[11],[13] 5,263 [7],[8],[12],[22]              
Cost     5,515 [1],[4],[11],[13] 5,495 [7],[8],[12],[22]              
Investment, Identifier [Axis]: ISS#2, LLC (d/b/a Industrial Services Solutions), Commercial Services & Supplies, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9]       6,407              
Cost [7],[8],[9]       6,639              
Investment, Identifier [Axis]: ITI Intermodal, Inc., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     103 103              
Investment, Identifier [Axis]: ITI Intermodal, Inc., Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     118 124              
Investment, Identifier [Axis]: ITI Intermodal, Inc., Transportation Services, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6]     127                
Cost [4],[6]     144                
Investment, Identifier [Axis]: ITI Intermodal, Inc., Transportation Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     703 [1],[4],[17] 705 [7],[8],[15]              
Cost     700 [1],[4],[17] 705 [7],[8],[15]              
Investment, Identifier [Axis]: ITI Intermodal, Inc., Transportation Services, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value     5 [1],[4],[17] (2) [7],[8],[9]              
Cost     4 [1],[4],[17] (2) [7],[8],[9]              
Investment, Identifier [Axis]: Infoniqa Holdings GmbH, Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,729 [1],[4],[11],[20] 8,989 [7],[8],[12],[22]              
Cost     2,902 [1],[4],[11],[20] 8,947 [7],[8],[12],[22]              
Investment, Identifier [Axis]: Innovad Group II BV, Beverage, Food & Tobacco, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     5,495 [1],[4],[11],[20] 5,876 [7],[8],[12],[22]              
Cost     6,791 [1],[4],[11],[20] 6,321 [7],[8],[12],[22]              
Investment, Identifier [Axis]: Innovad Group II BV, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,261 1,825              
Investment, Identifier [Axis]: Innovative XCessories & Services, LLC, Automotive, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[18]     2,277                
Cost [1],[2],[18]     2,854                
Investment, Identifier [Axis]: Interstellar Group B.V., Delayed Draw Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,310 0              
Investment, Identifier [Axis]: Interstellar Group B.V., Delayed Draw Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     55 0              
Investment, Identifier [Axis]: Interstellar Group B.V., Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[13]     1,239                
Cost [1],[4],[11],[13]     1,191                
Investment, Identifier [Axis]: Iqor US Inc., Services: Business, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[17]     2,658                
Cost [1],[2],[17]     2,711                
Investment, Identifier [Axis]: Isagenix International, LLC, Wholesale, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[3],[4],[5]     553                
Cost [1],[2],[3],[4],[5]     1,160                
Investment, Identifier [Axis]: Isolstar Holding NV (IPCOM), Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     744 0              
Investment, Identifier [Axis]: Isolstar Holding NV (IPCOM), Trading Companies & Distributors, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[25]     4,436                
Cost [1],[4],[11],[25]     4,044                
Investment, Identifier [Axis]: Ivanti Software, Inc., High Tech Industries, Second Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[5]     3,383                
Cost [1],[5]     5,989                
Investment, Identifier [Axis]: JF Acquisition, LLC, Automotive, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     3,575 [1],[4],[17] 3,711 [7],[8],[9]              
Cost     3,747 [1],[4],[17] 3,763 [7],[8],[9]              
Investment, Identifier [Axis]: JSC Tekers Holdings, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value     0 0 0            
Investment, Identifier [Axis]: JSC Tekers Holdings, Common Stock, Controlled Investment                      
Summary of Investment Holdings [Line Items]                      
Fair Value     0 0              
Investment, Identifier [Axis]: JSC Tekers Holdings, Preferred Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value     0 6,197 4,753            
Investment, Identifier [Axis]: JSC Tekers Holdings, Preferred Stock, Controlled Investment                      
Summary of Investment Holdings [Line Items]                      
Fair Value     0 0              
Investment, Identifier [Axis]: JSC Tekers Holdings, Real Estate Management, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8],[12],[35],[42]       0              
Cost [8],[12],[35],[42]       0              
Investment, Identifier [Axis]: JSC Tekers Holdings, Real Estate Management, Preferred Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8],[12],[35],[42]       6,197              
Cost [8],[12],[35],[42]       4,753              
Investment, Identifier [Axis]: Jade Bidco Limited (Jane's), Aerospace & Defense, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[12],[19]       2,315              
Cost [7],[8],[12],[19]       2,257              
Investment, Identifier [Axis]: Jade Bidco Limited (Jane's), Aerospace & Defense, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[20]     4,009                
Cost [1],[4],[11],[20]     4,082                
Investment, Identifier [Axis]: Jade Bidco Limited (Jane's), Aerospace & Defense, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[16]     6,592                
Cost [1],[4],[11],[16]     6,576                
Investment, Identifier [Axis]: Jaguar Merger Sub Inc., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     422 1,961              
Investment, Identifier [Axis]: Jaguar Merger Sub Inc., Other Financial, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     7,617 [1],[4],[10] 2,486 [7],[8],[9]              
Cost     7,571 [1],[4],[10] 2,487 [7],[8],[9]              
Investment, Identifier [Axis]: Jaguar Merger Sub Inc., Other Financial, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value     (2) [1],[4],[10] (6) [7],[8],[9]              
Cost     (4) [1],[4],[10] (6) [7],[8],[9]              
Investment, Identifier [Axis]: Jaguar Merger Sub Inc., Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     490 490              
Investment, Identifier [Axis]: Jedson Engineering, Inc., Engineering & Construction Management, First Lien Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,650 [4],[40] 2,650 [8],[35]              
Cost     2,650 [4],[40] 2,650 [8],[35]              
Investment, Identifier [Axis]: JetBlue 2019-1 Class B Pass Through Trust, Airlines, Structured Secured Note - Class B                      
Summary of Investment Holdings [Line Items]                      
Fair Value     3,511 4,805              
Cost     3,609 4,165              
Investment, Identifier [Axis]: Jocassee Partners LLC                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     65 20,000              
Total contributed capital     35 30,000              
Investment, Identifier [Axis]: Jocassee Partners LLC, Investment Funds & Vehicles, 9.1% Member Interest                      
Summary of Investment Holdings [Line Items]                      
Fair Value     40,088 [11] 37,601 [12],[42]              
Cost     35,158 [11] 30,158 [12],[42]              
Investment, Identifier [Axis]: Jocassee Partners LLC, Joint Venture                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     65,000 20,000              
Investment, Identifier [Axis]: Jocassee Partners LLC, Member Interest                      
Summary of Investment Holdings [Line Items]                      
Fair Value     40,088 37,601 22,624            
Investment, Identifier [Axis]: Jon Bidco Limited, Capex & Acquisition Facility                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,441 0              
Investment, Identifier [Axis]: Jon Bidco Limited, Healthcare, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[44]     3,477                
Cost [1],[4],[11],[44]     3,813                
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, Consumer Products, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5]     2,745                
Cost [1],[4],[5]     2,736                
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, Consumer Products, LLC Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6]     115                
Cost [4],[6]     97                
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, Consumer Products, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5]     (6)                
Cost [1],[4],[5]     (7)                
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     418 0              
Investment, Identifier [Axis]: Kano Laboratories LLC, Chemicals, Plastics & Rubber, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     5,545 [1],[4],[18] 8,728 [7],[8],[19]              
Cost     5,535 [1],[4],[18] 8,773 [7],[8],[19]              
Investment, Identifier [Axis]: Kano Laboratories LLC, Chemicals, Plastics & Rubber, Partnership Equity                      
Summary of Investment Holdings [Line Items]                      
Fair Value     191 [4],[6] 205 [8]              
Cost     203 [4],[6] 203 [8]              
Investment, Identifier [Axis]: Kano Laboratories LLC, Delayed Draw Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     153 153              
Investment, Identifier [Axis]: Kano Laboratories LLC, Delayed Draw Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,830 4,544              
Investment, Identifier [Axis]: Kemmerer Operations, LLC, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,181 0              
Investment, Identifier [Axis]: Kemmerer Operations, LLC, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     908 0              
Investment, Identifier [Axis]: Kemmerer Operations, LLC, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,565 0              
Investment, Identifier [Axis]: Kemmerer Operations, LLC, Metals & Mining, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[4],[6]     1,181                
Cost [2],[4],[6]     1,589                
Investment, Identifier [Axis]: Kemmerer Operations, LLC, Metals & Mining, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[4]     1,565                
Cost [2],[4]     1,565                
Investment, Identifier [Axis]: Kene Acquisition, Inc. (En Engineering), Oil & Gas Equipment & Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     7,027 [1],[4],[5] 7,080 [7],[8],[15]              
Cost     7,071 [1],[4],[5] 7,125 [7],[8],[15]              
Investment, Identifier [Axis]: Kid Distro Holdings, LLC, Media & Entertainment, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     9,125 [1],[4],[5] 9,174 [7],[8],[9]              
Cost     9,080 [1],[4],[5] 9,168 [7],[8],[9]              
Investment, Identifier [Axis]: Kid Distro Holdings, LLC, Media & Entertainment, LLC Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     577 [4],[6] 638              
Cost     638 [4],[6] 638              
Investment, Identifier [Axis]: Kona Buyer, LLC, High Tech Industries, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     8,623 [1],[4],[10] 8,994 [7],[8],[9]              
Cost     8,615 [1],[4],[10] 8,785 [7],[8],[9]              
Investment, Identifier [Axis]: LAF International, Acquisition Facility                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 341              
Investment, Identifier [Axis]: LAF International, Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[12],[29]       1,446              
Cost [7],[8],[12],[29]       1,543              
Investment, Identifier [Axis]: Lambir Bidco Limited, Bridge Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 941              
Investment, Identifier [Axis]: Lambir Bidco Limited, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,766 1,881              
Investment, Identifier [Axis]: Lambir Bidco Limited, Healthcare, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,397 [1],[4],[11],[13] 4,810 [7],[8],[12],[22]              
Cost     4,794 [1],[4],[11],[13] 4,770 [7],[8],[12],[22]              
Investment, Identifier [Axis]: Lambir Bidco Limited, Healthcare, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[12],[22]       295              
Cost [7],[8],[12],[22]       292              
Investment, Identifier [Axis]: Lambir Bidco Limited, Healthcare, Second Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,409 [4],[11] 1,375 [8],[12]              
Cost     1,533 [4],[11] 1,363 [8],[12]              
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     298 0              
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[16]     633                
Cost [1],[4],[11],[16]     645                
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, Technology, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10],[11]     34                
Cost [1],[4],[10],[11]     35                
Investment, Identifier [Axis]: LeadsOnline, LLC, Business Equipment & Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5]     10,150                
Cost [1],[4],[5]     10,119                
Investment, Identifier [Axis]: LeadsOnline, LLC, Business Equipment & Services, LLC Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6]     65                
Cost [4],[6]     52                
Investment, Identifier [Axis]: LeadsOnline, LLC, Business Equipment & Services, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5]     (32)                
Cost [1],[4],[5]     (39)                
Investment, Identifier [Axis]: LeadsOnline, LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,603 0              
Investment, Identifier [Axis]: Learfield Communications, LLC, Broadcasting, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value     100 [1],[17] 128 [7],[15]              
Cost     94 [1],[17] 95 [7],[15]              
Investment, Identifier [Axis]: Learfield Communications, LLC, Broadcasting, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value     8,455 [5] 7,959 [9]              
Cost     8,784 [5] 7,909 [9]              
Investment, Identifier [Axis]: Legal Solutions Holdings, Business Services, Senior Subordinated Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     0 [3],[4],[40] 5,918 [8],[35],[41]              
Cost     10,129 [3],[4],[40] 10,129 [8],[35],[41]              
Investment, Identifier [Axis]: Liberty Steel Holdings USA Inc., Industrial Other, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[21]     19,846                
Cost [1],[4],[21]     19,847                
Investment, Identifier [Axis]: Lifestyle Intermediate II, LLC, Consumer Goods: Durable, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[4],[5]     2,980                
Cost [1],[2],[4],[5]     3,194                
Investment, Identifier [Axis]: Lifestyle Intermediate II, LLC, Consumer Goods: Durable, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[4],[5]     (168)                
Cost [1],[2],[4],[5]     0                
Investment, Identifier [Axis]: Lifestyle Intermediate II, LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,500 0              
Investment, Identifier [Axis]: LivTech Purchaser, Inc., Business Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     837 [1],[4],[5] 910 [7],[8],[9]              
Cost     855 [1],[4],[5] 908 [7],[8],[9]              
Investment, Identifier [Axis]: LivTech Purchaser, Inc., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     138 82              
Investment, Identifier [Axis]: LogMeIn, Inc., High Tech Industries, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[17]     1,253                
Cost [1],[2],[17]     1,942                
Investment, Identifier [Axis]: Long Term Care Group, Inc., Healthcare, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[17]     7,816                
Cost [1],[4],[17]     7,897                
Investment, Identifier [Axis]: MC Group Ventures Corporation, Business Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,123 [1],[4],[17] 3,656 [7],[8],[9]              
Cost     4,096 [1],[4],[17] 3,598 [7],[8],[9]              
Investment, Identifier [Axis]: MC Group Ventures Corporation, Business Services, Partnership Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     781 [4],[6] 761 [8]              
Cost     747 [4],[6] 747 [8]              
Investment, Identifier [Axis]: MC Group Ventures Corporation, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     296 817              
Investment, Identifier [Axis]: MNS Buyer, Inc., Construction and Building, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     835 [1],[4],[17] 905 [7],[8],[15]              
Cost     897 [1],[4],[17] 903 [7],[8],[15]              
Investment, Identifier [Axis]: MNS Buyer, Inc., Construction and Building, Partnership Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     54 [4],[6] 78 [8]              
Cost     77 [4],[6] 77 [8]              
Investment, Identifier [Axis]: MSG National Properties, Hotel, Gaming, & Leisure, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9],[12]       2,486              
Cost [7],[8],[9],[12]       2,378              
Investment, Identifier [Axis]: MVC Automotive Group GmbH, Bridge Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     7,149 7,149 7,149            
Investment, Identifier [Axis]: MVC Automotive Group GmbH, Common Equity Interest                      
Summary of Investment Holdings [Line Items]                      
Fair Value     9,675 7,699 9,582            
Investment, Identifier [Axis]: MVC Automotive Group Gmbh, Automotive                      
Summary of Investment Holdings [Line Items]                      
Fair Value [45]       14,848              
Cost [45]       16,702              
Investment, Identifier [Axis]: MVC Automotive Group Gmbh, Automotive, Bridge Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     7,149 [4],[11],[40] 7,149 [8],[12],[35],[45]              
Cost     7,149 [4],[11],[40] 7,149 [8],[12],[35],[45]              
Investment, Identifier [Axis]: MVC Automotive Group Gmbh, Automotive, Common Equity Interest                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8],[12],[35],[45]       7,699              
Cost [8],[12],[35],[45]       9,553              
Investment, Identifier [Axis]: MVC Automotive Group Gmbh, Automotive, Common Equity interest                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6],[11],[40]     9,675                
Cost [4],[6],[11],[40]     9,553                
Investment, Identifier [Axis]: MVC Private Equity Fund LP, General Partnership Interest                      
Summary of Investment Holdings [Line Items]                      
Fair Value     45 188 225            
Investment, Identifier [Axis]: MVC Private Equity Fund LP, Investment Funds & Vehicles                      
Summary of Investment Holdings [Line Items]                      
Fair Value [45]       7,564              
Cost [45]       9,124              
Investment, Identifier [Axis]: MVC Private Equity Fund LP, Investment Funds & Vehicles, General Partnership Interest                      
Summary of Investment Holdings [Line Items]                      
Fair Value     45 [11],[40] 188 [12],[35],[45]              
Cost     225 [11],[40] 225 [12],[35],[45]              
Investment, Identifier [Axis]: MVC Private Equity Fund LP, Investment Funds & Vehicles, Limited Partnership Interest                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,793 [11],[40] 7,376 [12],[35],[45]              
Cost     8,899 [11],[40] 8,899 [12],[35],[45]              
Investment, Identifier [Axis]: MVC Private Equity Fund LP, Limited Partnership Interest                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,793 7,376 8,899            
Investment, Identifier [Axis]: Maccamaw River LLC, Member Interest                      
Summary of Investment Holdings [Line Items]                      
Fair Value       0 0            
Investment, Identifier [Axis]: Magnetite XIX, Limited, Multi-Sector Holdings, Subordinated Notes                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[5],[11]     4,450                
Cost [2],[5],[11]     5,107                
Investment, Identifier [Axis]: Magnetite XIX, Limited, Multi-Sector Holdings, Subordinated Structured Notes                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[11]     7,992                
Cost [2],[11]     9,377                
Investment, Identifier [Axis]: Marmoutier Holding B.V., Consumer Products, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,093 [1],[4],[11],[20] 1,880 [7],[8],[12],[22]              
Cost     2,219 [1],[4],[11],[20] 1,872 [7],[8],[12],[22]              
Investment, Identifier [Axis]: Marmoutier Holding B.V., Consumer Products, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value     40 [1],[4],[11],[13] (4) [7],[8],[12],[22]              
Cost     42 [1],[4],[11],[13] (4) [7],[8],[12],[22]              
Investment, Identifier [Axis]: Marmoutier Holding B.V., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     24 405              
Investment, Identifier [Axis]: Marmoutier Holding B.V., Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     106 162              
Investment, Identifier [Axis]: Marshall Excelsior Co., Capital Goods, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     10,794                
Cost [1],[4],[10]     10,786                
Investment, Identifier [Axis]: Marshall Excelsior Co., Capital Goods, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[46]     1,217                
Cost [1],[4],[46]     1,215                
Investment, Identifier [Axis]: Marshall Excelsior Co., Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     413 0              
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee), Containers, Packaging & Glass, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,903 [1],[4],[10] 2,933 [7],[8],[9]              
Cost     2,872 [1],[4],[10] 2,892 [7],[8],[9]              
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee), Containers, Packaging & Glass, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value     3,894 [1],[4],[36] 4,442 [7],[8],[24]              
Cost     4,257 [1],[4],[36] 4,303 [7],[8],[24]              
Investment, Identifier [Axis]: Median B.V., Healthcare, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[11],[23]     7,449                
Cost [1],[11],[23]     9,797                
Investment, Identifier [Axis]: Medical Solutions Parent Holdings, Inc., Healthcare, Second Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,067 [1],[17] 4,362 [7],[9]              
Cost     4,382 [1],[17] 4,377 [7],[9]              
Investment, Identifier [Axis]: Mercell Holding AS, Capex Acquisition Facility                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     797 0              
Investment, Identifier [Axis]: Mercell Holding AS, Technology, Class A Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6],[11]     116                
Cost [4],[6],[11]     111                
Investment, Identifier [Axis]: Mercell Holding AS, Technology, Class B Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6],[11]     0                
Cost [4],[6],[11]     0                
Investment, Identifier [Axis]: Mercell Holding AS, Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[47]     3,102                
Cost [1],[4],[11],[47]     3,124                
Investment, Identifier [Axis]: Modern Star Holdings Bidco Pty Limited, Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     968 1,038              
Investment, Identifier [Axis]: Modern Star Holdings Bidco Pty Limited., Non-durable Consumer Goods, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     7,634 [1],[4],[11],[14] 8,299 [7],[8],[12],[48]              
Cost     8,324 [1],[4],[11],[14] 8,281 [7],[8],[12],[48]              
Investment, Identifier [Axis]: Murphy Midco Limited, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     407 2,617              
Investment, Identifier [Axis]: Murphy Midco Limited, Media, Diversified & Production, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,150 [1],[4],[11],[26] 5,104 [7],[8],[12],[34]              
Cost     1,258 [1],[4],[11],[26] 4,951 [7],[8],[12],[34]              
Investment, Identifier [Axis]: Music Reports, Inc., Media & Entertainment, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     6,816 [1],[4],[17] 7,313 [7],[8],[9]              
Cost     6,810 [1],[4],[17] 7,288 [7],[8],[9]              
Investment, Identifier [Axis]: NGS US Finco, LLC (f/k/a Dresser Natural Gas Solutions), Energy Equipment & Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,697 [1],[4],[17] 4,677 [7],[8],[15]              
Cost     4,693 [1],[4],[17] 4,734 [7],[8],[15]              
Investment, Identifier [Axis]: NPM Investments 28 B.V., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     463 0              
Investment, Identifier [Axis]: NPM Investments 28 B.V., Healthcare, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[13]     2,084                
Cost [1],[4],[11],[13]     1,904                
Investment, Identifier [Axis]: Napa Bidco Pty Ltd, Healthcare, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[30]     16,963                
Cost [1],[4],[11],[30]     19,527                
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Aerospace & Defense, Class A Preferred Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value     300 [4],[6] 459 [8]              
Cost     459 [4],[6] 459 [8]              
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Aerospace & Defense, Class B Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value     0 [4],[6] 51 [8]              
Cost     51 [4],[6] 51 [8]              
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Aerospace & Defense, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     5,096 [1],[4],[5] 5,580 [7],[8],[9]              
Cost     5,553 [1],[4],[5] 5,581 [7],[8],[9]              
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Aerospace & Defense, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value     5 [1],[4],[5] (23) [7],[8],[9]              
Cost     112 [1],[4],[5] (23) [7],[8],[9]              
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,180 1,311              
Investment, Identifier [Axis]: Navia Benefit Solutions, Inc., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 1,261              
Investment, Identifier [Axis]: Navia Benefit Solutions, Inc., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9]       2,703              
Cost [7],[8],[9]       2,668              
Investment, Identifier [Axis]: Navia Benefit Solutions, Inc., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[17]     2,649                
Cost [1],[4],[17]     2,663                
Investment, Identifier [Axis]: Navia Benefit Solutions, Inc., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[21]     2,918                
Cost [1],[4],[21]     2,920                
Investment, Identifier [Axis]: Nexus Underwriting Management Limited, Acquisition Facility                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     443 541              
Investment, Identifier [Axis]: Nexus Underwriting Management Limited, Other Financial, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[26]     1,508                
Cost [1],[4],[11],[26]     1,684                
Investment, Identifier [Axis]: Nexus Underwriting Management Limited, Other Financial, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[12],[27]       1,630              
Cost [7],[8],[12],[27]       1,620              
Investment, Identifier [Axis]: Nexus Underwriting Management Limited, Other Financial, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[12],[27]       101              
Cost [7],[8],[12],[27]       102              
Investment, Identifier [Axis]: Nexus Underwriting Management Limited, Other Financial, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[26]     184                
Cost [1],[4],[11],[26]     202                
Investment, Identifier [Axis]: Nexus Underwriting Management Limited, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 103              
Investment, Identifier [Axis]: Northstar Recycling, LLC, Environmental Industries, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,446 [1],[4],[5] 2,450 [7],[8],[9]              
Cost     2,434 [1],[4],[5] 2,452 [7],[8],[9]              
Investment, Identifier [Axis]: Novotech Aus Bidco Pty Ltd, Capex & Acquisition Facility                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     809 0              
Investment, Identifier [Axis]: Novotech Aus Bidco Pty Ltd, Healthcare, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[30]     3,406                
Cost [1],[4],[11],[30]     3,667                
Investment, Identifier [Axis]: Novotech Aus Bidco Pty Ltd, Healthcare, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[16]     443                
Cost [1],[4],[11],[16]     449                
Investment, Identifier [Axis]: OA Buyer, Inc., Healthcare, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     5,501 [1],[4],[17] 8,331 [7],[8],[9]              
Cost     5,488 [1],[4],[17] 8,331 [7],[8],[9]              
Investment, Identifier [Axis]: OA Buyer, Inc., Healthcare, Partnership Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     226 [4],[6] 211 [8]              
Cost     211 [4],[6] 211 [8]              
Investment, Identifier [Axis]: OA Buyer, Inc., Healthcare, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value     (21) [1],[4],[17] (27) [7],[8],[9]              
Cost     (23) [1],[4],[17] (27) [7],[8],[9]              
Investment, Identifier [Axis]: OA Buyer, Inc., Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,331 1,331              
Investment, Identifier [Axis]: OAC Holdings I Corp, Automotive, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[16]     3,567                
Cost [1],[4],[16]     3,556                
Investment, Identifier [Axis]: OAC Holdings I Corp, Automotive, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[16]     743                
Cost [1],[4],[16]     739                
Investment, Identifier [Axis]: OAC Holdings I Corp., Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     607              
Investment, Identifier [Axis]: OG III B.V., Acquisition CapEx Facility                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 686              
Investment, Identifier [Axis]: OG III B.V., Containers & Glass Products, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     3,310 [1],[4],[11],[13] 2,843 [7],[8],[12],[22]              
Cost     3,674 [1],[4],[11],[13] 2,997 [7],[8],[12],[22]              
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     187 187              
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,190 [1],[4],[5] 2,235 [7],[8],[15]              
Cost     2,219 [1],[4],[5] 2,235 [7],[8],[15]              
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Technology, First Lien Senior Secured Term Loan1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     2,206                
Cost [1],[4],[10]     2,206                
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Technology, LP Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6]     221                
Cost [4],[6]     208                
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Technology, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value     (6) [1],[4],[5] (4) [7],[8],[9]              
Cost     (3) [1],[4],[5] (4) [7],[8],[9]              
Investment, Identifier [Axis]: Odeon Cinemas Group Limited, Hotel, Gaming, & Leisure, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8],[12]       4,033              
Cost [8],[12]       4,055              
Investment, Identifier [Axis]: Offen Inc., Transportation: Cargo, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[4],[17]     3,627                
Cost [2],[4],[17]     3,702                
Investment, Identifier [Axis]: Omni Intermediate Holdings, LLC, Delayed Draw Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 817              
Investment, Identifier [Axis]: Omni Intermediate Holdings, LLC, Delayed Draw Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,289 4,357              
Investment, Identifier [Axis]: Omni Intermediate Holdings, LLC, Transportation, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     5,995 [1],[4],[10] 11,491 [7],[8],[15]              
Cost     6,098 [1],[4],[10] 11,461 [7],[8],[15]              
Investment, Identifier [Axis]: Options Technology Ltd., Computer Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,251 [1],[4],[11],[18] 2,267 [7],[8],[9],[12]              
Cost     2,266 [1],[4],[11],[18] 2,282 [7],[8],[9],[12]              
Investment, Identifier [Axis]: Oracle Vision Bidco Limited, Healthcare, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,753 [1],[4],[11],[26] 3,028 [7],[8],[12],[27]              
Cost     3,151 [1],[4],[11],[26] 3,141 [7],[8],[12],[27]              
Investment, Identifier [Axis]: Origin Bidco Limited, Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9],[12]       584              
Cost [7],[8],[9],[12]       582              
Investment, Identifier [Axis]: Origin Bidco Limited, Technology, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[13]     342                
Cost [1],[4],[11],[13]     395                
Investment, Identifier [Axis]: Origin Bidco Limited, Technology, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5],[11]     577                
Cost [1],[4],[5],[11]     584                
Investment, Identifier [Axis]: Origin Bidco Limited, Technology, First Lien Senior Secured Term Loan1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[12],[22]       369              
Cost [7],[8],[12],[22]       394              
Investment, Identifier [Axis]: PDQ.Com Corporation, Business Equipment & Services, Class A-2 Partnership Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     41 [4],[6] 29 [8]              
Cost     29 [4],[6] 29 [8]              
Investment, Identifier [Axis]: PDQ.Com Corporation, Business Equipment & Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     8,172 [1],[4],[5] 8,707 [7],[8],[9]              
Cost     8,116 [1],[4],[5] 8,710 [7],[8],[9]              
Investment, Identifier [Axis]: PDQ.Com Corporation, Delayed Draw Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 289              
Investment, Identifier [Axis]: PDQ.Com Corporation, Delayed Draw Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     6,885 10,948              
Investment, Identifier [Axis]: PSP Intermediate 4, L.L.C., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     727 0              
Investment, Identifier [Axis]: PSP Intermediate 4, LLC, Technology, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[13]     829                
Cost [1],[4],[11],[13]     825                
Investment, Identifier [Axis]: PSP Intermediate 4, LLC, Technology, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5],[11]     842                
Cost [1],[4],[5],[11]     844                
Investment, Identifier [Axis]: Pacific Health Supplies Bidco Pty Limited, CapEx Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 1,283              
Investment, Identifier [Axis]: Pacific Health Supplies Bidco Pty Limited, Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[12],[31]       8,529              
Cost [7],[8],[12],[31]       8,730              
Investment, Identifier [Axis]: Panoche Energy Center LLC, Electric, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4]     4,628                
Cost [4]     4,430                
Investment, Identifier [Axis]: Pare SAS (SAS Maurice MARLE), Health Care Equipment, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8],[12],[22]       4,638              
Cost [8],[12],[22]       4,478              
Investment, Identifier [Axis]: Pare SAS (SAS Maurice MARLE), Health Care Equipment, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[20]     2,638                
Cost [1],[4],[11],[20]     2,807                
Investment, Identifier [Axis]: Pare SAS (SAS Maurice MARLE), Health Care Equipment, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10],[11]     1,455                
Cost [1],[4],[10],[11]     1,500                
Investment, Identifier [Axis]: Patriot New Midco 1 Limited (Forensic Risk Alliance), Diversified Financial Services, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,702 [1],[4],[11],[13] 3,591 [7],[8],[9],[12]              
Cost     2,850 [1],[4],[11],[13] 3,685 [7],[8],[9],[12]              
Investment, Identifier [Axis]: Patriot New Midco 1 Limited (Forensic Risk Alliance), Diversified Financial Services, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value     3,159 [1],[4],[5],[11] 3,068 [7],[8],[12],[22]              
Cost     3,264 [1],[4],[5],[11] 3,017 [7],[8],[12],[22]              
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class A                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[11]     165                
Cost [4],[11]     182                
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class B                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[11]     162                
Cost [4],[11]     182                
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class C                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[11]     157                
Cost [4],[11]     182                
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class D                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[11]     158                
Cost [4],[11]     181                
Investment, Identifier [Axis]: Perimeter Master Note Business Trust, Credit Card ABS, Structured Secured Note - Class E                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[11]     8,154                
Cost [4],[11]     9,273                
Investment, Identifier [Axis]: Permaconn BidCo Pty Ltd, Tele-communications, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[43]     2,728                
Cost [1],[4],[11],[43]     2,864                
Investment, Identifier [Axis]: Permaconn Bidco Ltd, Tele-communications, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[12],[48]       14,599              
Cost [7],[8],[12],[48]       14,386              
Investment, Identifier [Axis]: Polara Enterprises, L.L.C., Capital Equipment, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5]     1,210                
Cost [1],[4],[5]     1,209                
Investment, Identifier [Axis]: Polara Enterprises, L.L.C., Capital Equipment, Partnership Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6]     823                
Cost [4],[6]     741                
Investment, Identifier [Axis]: Polara Enterprises, L.L.C., Capital Equipment, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5]     (9)                
Cost [1],[4],[5]     (9)                
Investment, Identifier [Axis]: Polara Enterprises, L.L.C., Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     545 545              
Investment, Identifier [Axis]: Polara Enterprises, LLC, Capital Equipment, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9]       4,158              
Cost [7],[8],[9]       4,159              
Investment, Identifier [Axis]: Polara Enterprises, LLC, Capital Equipment, Partnership Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8]       382              
Cost [8]       382              
Investment, Identifier [Axis]: Polara Enterprises, LLC, Capital Equipment, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9]       (11)              
Cost [7],[8],[9]       (11)              
Investment, Identifier [Axis]: Policy Services Company, LLC, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 6,944              
Investment, Identifier [Axis]: Policy Services Company, LLC, Property & Casualty Insurance, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     48,490 [1],[4],[5] 44,008 [7],[8],[9]              
Cost     48,487 [1],[4],[5] 44,018 [7],[8],[9]              
Investment, Identifier [Axis]: Policy Services Company, LLC, Property & Casualty Insurance, Warrants - Class A                      
Summary of Investment Holdings [Line Items]                      
Fair Value     438 [4],[6] 0 [8]              
Cost     0 [4],[6] 0 [8]              
Investment, Identifier [Axis]: Policy Services Company, LLC, Property & Casualty Insurance, Warrants - Class B                      
Summary of Investment Holdings [Line Items]                      
Fair Value     148 [4],[6] 0 [8]              
Cost     0 [4],[6] 0 [8]              
Investment, Identifier [Axis]: Policy Services Company, LLC, Property & Casualty Insurance, Warrants - Class CC                      
Summary of Investment Holdings [Line Items]                      
Fair Value     0 [4],[6] 0 [8]              
Cost     0 [4],[6] 0 [8]              
Investment, Identifier [Axis]: Policy Services Company, LLC, Property & Casualty Insurance, Warrants - Class D                      
Summary of Investment Holdings [Line Items]                      
Fair Value     42 [4],[6] 0 [8]              
Cost     0 [4],[6] 0 [8]              
Investment, Identifier [Axis]: Polymer Solutions Group Holdings, LLC, Chemicals, Plastics & Rubber, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[4],[17]     987                
Cost [1],[2],[4],[17]     997                
Investment, Identifier [Axis]: Premium Franchise Brands, LLC, Research & Consulting Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     12,510 [1],[4],[5] 14,556 [7],[8],[9]              
Cost     12,496 [1],[4],[5] 14,597 [7],[8],[9]              
Investment, Identifier [Axis]: Premium Invest, Brokerage, Asset Managers & Exchanges, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     5,656 [1],[4],[11],[20] 4,010 [7],[8],[12],[22]              
Cost     5,804 [1],[4],[11],[20] 4,113 [7],[8],[12],[22]              
Investment, Identifier [Axis]: Premium Invest, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,882 1,933              
Investment, Identifier [Axis]: Preqin MC Limited, Banking, Finance, Insurance & Real Estate, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,719 [1],[4],[11],[18] 2,764 [7],[8],[12],[49]              
Cost     2,719 [1],[4],[11],[18] 2,695 [7],[8],[12],[49]              
Investment, Identifier [Axis]: Process Equipment, Inc. (ProcessBarron), Industrial Air & Material Handling Equipment, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,907 [1],[4],[10] 5,945 [7],[8],[9]              
Cost     5,430 [1],[4],[10] 6,115 [7],[8],[9]              
Investment, Identifier [Axis]: Process Equipment, Inc. (ProcessBarron), Industrial Air & Material Handling Equipment, First Lien Senior Secured Term Loan1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[17]     304                
Cost [1],[4],[17]     337                
Investment, Identifier [Axis]: Professional Datasolutions, Inc. (PDI), Application Software, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,751 [1],[4],[5] 1,809 [7],[8],[9]              
Cost     1,821 [1],[4],[5] 1,833 [7],[8],[9]              
Investment, Identifier [Axis]: Profit Optics, LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     484 0              
Investment, Identifier [Axis]: ProfitOptics, LLC, Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[18]     1,624                
Cost [1],[4],[18]     1,619                
Investment, Identifier [Axis]: ProfitOptics, LLC, Technology, LLC Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6]     172                
Cost [4],[6]     161                
Investment, Identifier [Axis]: ProfitOptics, LLC, Technology, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[18]     (7)                
Cost [1],[4],[18]     (8)                
Investment, Identifier [Axis]: ProfitOptics, LLC, Technology, Second Lien Senior Subordinated Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4]     74                
Cost [4]     81                
Investment, Identifier [Axis]: Proppants Holding, LLC, Energy: Oil & Gas, LLC Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[4],[6]     0                
Cost [2],[4],[6]     0                
Investment, Identifier [Axis]: Protego Bidco B.V., Aerospace & Defense, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[20]     1,365                
Cost [1],[4],[11],[20]     1,569                
Investment, Identifier [Axis]: Protego Bidco B.V., Aerospace & Defense, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[12],[22]       2,195              
Cost [7],[8],[12],[22]       2,269              
Investment, Identifier [Axis]: Protego Bidco B.V., Aerospace & Defense, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[12],[22]       1,495              
Cost [7],[8],[12],[22]       1,561              
Investment, Identifier [Axis]: Protego Bidco B.V., Aerospace & Defense, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[20]     2,017                
Cost [1],[4],[11],[20]     2,275                
Investment, Identifier [Axis]: Protego Bidco B.V., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     792 844              
Investment, Identifier [Axis]: QPE7 SPV1 BidCo Pty Ltd, Acquisition Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 373              
Investment, Identifier [Axis]: QPE7 SPV1 BidCo Pty Ltd, Consumer Cyclical, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,821 [1],[4],[11],[14] 1,605 [7],[8],[12],[31]              
Cost     1,965 [1],[4],[11],[14] 1,564 [7],[8],[12],[31]              
Investment, Identifier [Axis]: Questel Unite, Business Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     6,692 [1],[4],[5],[11] 6,851 [7],[8],[9],[12]              
Cost     6,815 [1],[4],[5],[11] 6,802 [7],[8],[9],[12]              
Investment, Identifier [Axis]: R1 Holdings, LLC, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,623 0              
Investment, Identifier [Axis]: R1 Holdings, LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,601 0              
Investment, Identifier [Axis]: R1 Holdings, LLC, Transportation, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     9,873                
Cost [1],[4],[10]     9,873                
Investment, Identifier [Axis]: R1 Holdings, LLC, Transportation, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     403                
Cost [1],[4],[10]     403                
Investment, Identifier [Axis]: RA Outdoors, LLC, High Tech Industries, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[4],[5]     12,658                
Cost [1],[2],[4],[5]     12,658                
Investment, Identifier [Axis]: RA Outdoors, LLC, High Tech Industries, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[4],[5]     (25)                
Cost [1],[2],[4],[5]     0                
Investment, Identifier [Axis]: RA Outdoors, LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,235 0              
Investment, Identifier [Axis]: REP SEKO MERGER SUB LLC, Air Freight & Logistics, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9]       7,478              
Cost [7],[8],[9]       7,416              
Investment, Identifier [Axis]: REP SEKO MERGER SUB LLC, Air Freight & Logistics, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[25]     9,438                
Cost [1],[4],[25]     9,245                
Investment, Identifier [Axis]: REP SEKO MERGER SUB LLC, Air Freight & Logistics, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5]     1,274                
Cost [1],[4],[5]     1,264                
Investment, Identifier [Axis]: RPX Corporation, Research & Consulting Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     7,144 [1],[4],[5] 7,455 [7],[8],[9]              
Cost     7,174 [1],[4],[5] 7,426 [7],[8],[9]              
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Class A Preferred Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[4]     1                
Cost [2],[4]     4                
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Class B Preferred Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[4],[6]     0                
Cost [2],[4],[6]     0                
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Class C Preferred Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[4],[6]     155                
Cost [2],[4],[6]     450                
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[4],[6]     0                
Cost [2],[4],[6]     0                
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[4],[21]     9,761                
Cost [1],[2],[4],[21]     10,032                
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Consumer Goods: Durable, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[4],[21]     1,480                
Cost [1],[2],[4],[21]     1,587                
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,381 0              
Investment, Identifier [Axis]: Randys Holdings, Inc., Automobile Manufacturers. First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     12,708                
Cost [1],[4],[10]     12,727                
Investment, Identifier [Axis]: Randys Holdings, Inc., Automobile Manufacturers. Partnership Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6]     533                
Cost [4],[6]     533                
Investment, Identifier [Axis]: Randys Holdings, Inc., Automobile Manufacturers. Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     238                
Cost [1],[4],[10]     239                
Investment, Identifier [Axis]: Randys Holdings, Inc., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     4,412 0              
Investment, Identifier [Axis]: Randys Holdings, Inc., Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,571 0              
Investment, Identifier [Axis]: Recovery Point Systems, Inc., Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     11,392 [1],[4],[5] 11,648 [7],[8],[9],[50]              
Cost     11,379 [1],[4],[5] 11,460 [7],[8],[9],[50]              
Investment, Identifier [Axis]: Recovery Point Systems, Inc., Technology, Partnership Equity                      
Summary of Investment Holdings [Line Items]                      
Fair Value     125 [4],[6] 150 [8]              
Cost     187 [4],[6] 187 [8]              
Investment, Identifier [Axis]: Renovation Parent Holdings, LLC, Home Furnishings, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,556 [1],[4],[5] 4,733 [7],[8],[19]              
Cost     4,706 [1],[4],[5] 4,735 [7],[8],[19]              
Investment, Identifier [Axis]: Renovation Parent Holdings, LLC, Home Furnishings, Partnership Equity                      
Summary of Investment Holdings [Line Items]                      
Fair Value     152 [4],[6] 203 [8]              
Cost     197 [4],[6] 197 [8]              
Investment, Identifier [Axis]: Rep Seko Merger Sub LLC, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     725 1,455              
Investment, Identifier [Axis]: Resolute Investment Managers, Inc., Banking, Finance, Insurance & Real Estate, Second Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[4],[5]     4,243                
Cost [1],[2],[4],[5]     5,107                
Investment, Identifier [Axis]: Resonetics, LLC, Health Care Equipment, Second Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     3,926 [1],[4],[5] 3,930 [7],[8],[9]              
Cost     3,942 [1],[4],[5] 3,934 [7],[8],[9]              
Investment, Identifier [Axis]: Reward Gateway (UK) Ltd, Acquisition Facility                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     600 1,061              
Investment, Identifier [Axis]: Reward Gateway (UK) Ltd, Precious Metals & Minerals, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,840 [1],[4],[11],[26] 2,776 [7],[8],[12],[27]              
Cost     3,230 [1],[4],[11],[26] 2,807 [7],[8],[12],[27]              
Investment, Identifier [Axis]: Riedel Beheer B.V., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 153              
Investment, Identifier [Axis]: Riedel Beheer B.V., Food & Beverage, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,162 [1],[4],[11],[13] 1,843 [7],[8],[12],[22]              
Cost     2,248 [1],[4],[11],[13] 1,835 [7],[8],[12],[22]              
Investment, Identifier [Axis]: Riedel Beheer B.V., Food & Beverage, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[12],[22]       (5)              
Cost [7],[8],[12],[22]       (5)              
Investment, Identifier [Axis]: Riedel Beheer B.V., Food & Beverage, Super Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[12],[22]       223              
Cost [7],[8],[12],[22]       222              
Investment, Identifier [Axis]: Riedel Beheer B.V., Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 230              
Investment, Identifier [Axis]: Royal Buyer, LLC, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,209 0              
Investment, Identifier [Axis]: Royal Buyer, LLC, Industrial Other, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     10,808                
Cost [1],[4],[10]     10,791                
Investment, Identifier [Axis]: Royal Buyer, LLC, Industrial Other, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     377                
Cost [1],[4],[10]     374                
Investment, Identifier [Axis]: Royal Buyer, LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,340 0              
Investment, Identifier [Axis]: Ruffalo Noel Levitz, LLC, Media Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     9,238 [1],[4],[5] 9,543 [7],[8],[9]              
Cost     9,445 [1],[4],[5] 9,524 [7],[8],[9]              
Investment, Identifier [Axis]: SISU ACQUISITIONCO., INC., Aerospace & Defense, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     6,376 [1],[4],[5] 6,771 [7],[8],[9]              
Cost     6,840 [1],[4],[5] 6,869 [7],[8],[9]              
Investment, Identifier [Axis]: SMART Financial Operations, LLC, Banking, Finance, Insurance & Real Estate, Preferred Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[4],[6]     110                
Cost [2],[4],[6]     0                
Investment, Identifier [Axis]: SN BUYER, LLC, Health Care Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     10,951 [1],[4],[5] 18,394 [7],[8],[15]              
Cost     10,972 [1],[4],[5] 18,080 [7],[8],[15]              
Investment, Identifier [Axis]: SOLO Buyer, L.P., Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     22,041                
Cost [1],[4],[10]     22,046                
Investment, Identifier [Axis]: SOLO Buyer, L.P., Technology, Partnership Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6]     516                
Cost [4],[6]     516                
Investment, Identifier [Axis]: SOLO Buyer, L.P., Technology, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     (50)                
Cost [1],[4],[10]     (49)                
Investment, Identifier [Axis]: SPT Acquico Limited, High Tech Industries, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9],[12]       658              
Cost [7],[8],[9],[12]       644              
Investment, Identifier [Axis]: SSCP Pegasus Midco Limited, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     4,664 5,251              
Investment, Identifier [Axis]: SSCP Pegasus Midco Limited, Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,383 [1],[4],[11],[23] 2,722 [7],[8],[12],[24]              
Cost     2,566 [1],[4],[11],[23] 2,488 [7],[8],[12],[24]              
Investment, Identifier [Axis]: Safety Products Holdings, LLC, Non-durable Consumer Goods, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     11,792 [1],[4],[5] 11,755 [7],[8],[15]              
Cost     11,762 [1],[4],[5] 11,798 [7],[8],[15]              
Investment, Identifier [Axis]: Safety Products Holdings, LLC, Non-durable Consumer Goods, Preferred Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value     460 [4],[6] 510 [8]              
Cost     372 [4],[6] 372 [8]              
Investment, Identifier [Axis]: Sanoptis S.A.R.L., Acquisition Capex Facility                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,751 0              
Investment, Identifier [Axis]: Sanoptis S.A.R.L., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[20]     1,939                
Cost [1],[4],[11],[20]     1,784                
Investment, Identifier [Axis]: Sanoptis S.A.R.L., Healthcare & Pharmaceuticals, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[51]     3,886                
Cost [1],[4],[11],[51]     3,738                
Investment, Identifier [Axis]: Scaled Agile, Inc., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     416 416              
Investment, Identifier [Axis]: Scaled Agile, Inc., Research & Consulting Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,716 [1],[4],[10] 1,705 [7],[8],[9]              
Cost     1,701 [1],[4],[10] 1,705 [7],[8],[9]              
Investment, Identifier [Axis]: Scaled Agile, Inc., Research & Consulting Services, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value     (3) [1],[4],[10] (7) [7],[8],[9]              
Cost     (6) [1],[4],[10] (7) [7],[8],[9]              
Investment, Identifier [Axis]: Scaled Agile, Inc., Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     336 336              
Investment, Identifier [Axis]: Scout Bidco B.V., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,270 0              
Investment, Identifier [Axis]: Scout Bidco B.V., Diversified Manufacturing, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[13]     6,310                
Cost [1],[4],[11],[13]     6,286                
Investment, Identifier [Axis]: Scout Bidco B.V., Diversified Manufacturing, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[13]     (21)                
Cost [1],[4],[11],[13]     (24)                
Investment, Identifier [Axis]: Scout Bidco B.V., Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,030 0              
Investment, Identifier [Axis]: Security Holdings B.V, Bridge Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     0 5,451 5,188            
Investment, Identifier [Axis]: Security Holdings B.V, Bridge Loan, Controlled                      
Summary of Investment Holdings [Line Items]                      
Fair Value     6,020 0              
Investment, Identifier [Axis]: Security Holdings B.V, Common Equity Interest                      
Summary of Investment Holdings [Line Items]                      
Fair Value     0 24,825 21,329            
Investment, Identifier [Axis]: Security Holdings B.V, Common Stock Series A, Controlled                      
Summary of Investment Holdings [Line Items]                      
Fair Value     575 0              
Investment, Identifier [Axis]: Security Holdings B.V, Common Stock Series B, Controlled                      
Summary of Investment Holdings [Line Items]                      
Fair Value     53,728 0              
Investment, Identifier [Axis]: Security Holdings B.V, Senior Subordinated Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     0 9,525 8,746            
Investment, Identifier [Axis]: Security Holdings B.V, Senior Subordinated Note, Controlled                      
Summary of Investment Holdings [Line Items]                      
Fair Value     0 0              
Investment, Identifier [Axis]: Security Holdings B.V, Senior Subordinated Term Loan, Controlled                      
Summary of Investment Holdings [Line Items]                      
Fair Value     10,534 0              
Investment, Identifier [Axis]: Security Holdings B.V, Senior Unsecured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     0 7,307 0            
Investment, Identifier [Axis]: Security Holdings B.V, Senior Unsecured Term Loan, Controlled                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,015 0              
Investment, Identifier [Axis]: Security Holdings B.V. Electrical Engineering                      
Summary of Investment Holdings [Line Items]                      
Fair Value [52]       47,108              
Cost [52]       43,879              
Investment, Identifier [Axis]: Security Holdings B.V. Electrical Engineering, Bridge Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8],[12],[35],[52]       5,451              
Cost [8],[12],[35],[52]       5,451              
Investment, Identifier [Axis]: Security Holdings B.V. Electrical Engineering, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8],[12],[35],[52]       24,825              
Cost [8],[12],[35],[52]       21,264              
Investment, Identifier [Axis]: Security Holdings B.V. Electrical Engineering, Senior Subordinated Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8],[12],[35],[52]       9,525              
Cost [8],[12],[35],[52]       9,525              
Investment, Identifier [Axis]: Security Holdings B.V. Electrical Engineering, Senior Unsecured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8],[12],[35],[52]       7,307              
Cost [8],[12],[35],[52]       7,639              
Investment, Identifier [Axis]: Security Holdings B.V., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,134 2,274              
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Bridge Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[11],[40]     6,020                
Cost [4],[11],[40]     6,020                
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Common Stock Series A                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6],[11],[40]     575                
Cost [4],[6],[11],[40]     560                
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Common Stock Series B                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6],[11],[40]     53,728                
Cost [4],[6],[11],[40]     35,192                
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Senior Subordinated Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[11],[40]     10,534                
Cost [4],[11],[40]     10,534                
Investment, Identifier [Axis]: Security Holdings B.V., Electrical Engineering, Senior Unsecured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[11],[40]     2,015                
Cost [4],[11],[40]     2,164                
Investment, Identifier [Axis]: Security Holdings B.V., Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,067 1,137              
Investment, Identifier [Axis]: Sereni Capital NV, Consumer Cyclical, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[20]     348                
Cost [1],[4],[11],[20]     331                
Investment, Identifier [Axis]: Sereni Capital NV, Consumer Cyclical, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[20]     479                
Cost [1],[4],[11],[20]     479                
Investment, Identifier [Axis]: Sereni Capital NV, Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     109 0              
Investment, Identifier [Axis]: Serta Simmons Bedding LLC, Home Furnishings, Super Priority First Out                      
Summary of Investment Holdings [Line Items]                      
Fair Value     7,148 [1],[5] 7,409 [7],[15]              
Cost     7,228 [1],[5] 7,229 [7],[15]              
Investment, Identifier [Axis]: Serta Simmons Bedding LLC, Home Furnishings, Super Priority Second Out                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,625 [1],[5] 3,365 [7],[15]              
Cost     3,372 [1],[5] 3,374 [7],[15]              
Investment, Identifier [Axis]: Shelf Bidco Ltd., Other Financial, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6],[11]     1,200                
Cost [4],[6],[11]     1,200                
Investment, Identifier [Axis]: Shelf Bidco Ltd., Other Financial, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10],[11]     33,720                
Cost [1],[4],[10],[11]     33,720                
Investment, Identifier [Axis]: Sierra Senior Loan Strategy JV I LLC, Joint Venture, 89.01% Member Interest                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[11]     37,950                
Cost [2],[11]     50,221                
Investment, Identifier [Axis]: Sierra Senior Loan Strategy JV I LLC, Member Interest                      
Summary of Investment Holdings [Line Items]                      
Fair Value     37,950 0              
Investment, Identifier [Axis]: Sierra Senior Loan Strategy JV LLC (Sierra JV)                      
Summary of Investment Holdings [Line Items]                      
Total contributed capital     110,100                
Investment, Identifier [Axis]: Smartling, Inc., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,978 2,353              
Investment, Identifier [Axis]: Smartling, Inc., Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,176 1,176              
Investment, Identifier [Axis]: Smartling, Inc., Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     13,393 [1],[4],[17] 16,094 [7],[8],[9]              
Cost     13,445 [1],[4],[17] 16,102 [7],[8],[9]              
Investment, Identifier [Axis]: Smartling, Inc., Technology, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value     (24) [1],[4],[17] (24) [7],[8],[9]              
Cost     (19) [1],[4],[17] (23) [7],[8],[9]              
Investment, Identifier [Axis]: Smile Brands Group Inc., Health Care Services, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,196 [1],[4],[18] 4,553 [7],[8],[9]              
Cost     4,521 [1],[4],[18] 4,571 [7],[8],[9]              
Investment, Identifier [Axis]: Smile Brands Group Inc., Health Care Services, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value     565 [1],[4],[18] (6) [7],[8],[9]              
Cost     606 [1],[4],[18] (12) [7],[8],[9]              
Investment, Identifier [Axis]: Smile Brands Group, Inc., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     38 655              
Investment, Identifier [Axis]: Soho Square III Debtco II SARL, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     3,383 0              
Investment, Identifier [Axis]: Soho Square III Debtco II SARL, Diversified Capital Markets, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[11]     5,616                
Cost [4],[11]     5,177                
Investment, Identifier [Axis]: Solo Buyer, L.P., Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,995 0              
Investment, Identifier [Axis]: Sound Point CLO XX, Ltd., Multi-Sector Holdings, Subordinated Structured Notes                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[11]     1,192                
Cost [2],[11]     2,205                
Investment, Identifier [Axis]: Sparus Holdings, LLC (f/k/a Sparus Holdings, Inc.), Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     666 0              
Investment, Identifier [Axis]: Sparus Holdings, LLC (f/k/a Sparus Holdings, Inc.), Other Utility, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     1,621                
Cost [1],[4],[10]     1,623                
Investment, Identifier [Axis]: Sparus Holdings, LLC (f/k/a Sparus Holdings, Inc.), Other Utility, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     (4)                
Cost [1],[4],[10]     (3)                
Investment, Identifier [Axis]: Sparus Holdings, LLC (f/k/a Sparus Holdings, Inc.), Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     156 0              
Investment, Identifier [Axis]: Spatial Business Systems LLC, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     7,500 0              
Investment, Identifier [Axis]: Spatial Business Systems LLC, Electric, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[21]     5,754                
Cost [1],[4],[21]     5,766                
Investment, Identifier [Axis]: Spatial Business Systems LLC, Electric, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[21]     (35)                
Cost [1],[4],[21]     (34)                
Investment, Identifier [Axis]: Spatial Business Systems LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,406 0              
Investment, Identifier [Axis]: Springbrook Software (SBRK Intermediate, Inc.), Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 2,373              
Investment, Identifier [Axis]: Springbrook Software (SBRK Intermediate, Inc.), Enterprise Software & Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9]       10,346              
Cost [7],[8],[9]       10,179              
Investment, Identifier [Axis]: Springbrook Software (SBRK Intermediate, Inc.), Enterprise Software & Services, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[17]     20,510                
Cost [1],[4],[17]     20,660                
Investment, Identifier [Axis]: Springbrook Software (SBRK Intermediate, Inc.), Enterprise Software & Services, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     2,763                
Cost [1],[4],[10]     2,763                
Investment, Identifier [Axis]: Starnmeer B.V., Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,477 [1],[4],[5],[11] 7,388 [7],[8],[9],[12]              
Cost     2,469 [1],[4],[5],[11] 7,391 [7],[8],[9],[12]              
Investment, Identifier [Axis]: Superjet Buyer, LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,825 1,825              
Investment, Identifier [Axis]: Superjet Buyer, LLC, Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     12,860 [1],[4],[5] 22,711 [7],[8],[9]              
Cost     12,818 [1],[4],[5] 22,711 [7],[8],[9]              
Investment, Identifier [Axis]: Superjet Buyer, LLC, Technology, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value     (26) [1],[4],[5] (37) [7],[8],[9]              
Cost     (31) [1],[4],[5] (37) [7],[8],[9]              
Investment, Identifier [Axis]: Syniverse Holdings, Inc., Technology Distributors, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[9]       17,192              
Cost [7],[9]       16,493              
Investment, Identifier [Axis]: Syniverse Holdings, Inc., Technology Distributors, Series A Preferred Equity                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4]     6,515                
Cost [4]     7,945                
Investment, Identifier [Axis]: Syntax Systems Ltd, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,933 1,933              
Investment, Identifier [Axis]: Syntax Systems Ltd, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     337 569              
Investment, Identifier [Axis]: Syntax Systems Ltd, Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,812 [1],[4],[11],[17] 2,016 [7],[8],[12],[15]              
Cost     1,992 [1],[4],[11],[17] 2,018 [7],[8],[12],[15]              
Investment, Identifier [Axis]: Syntax Systems Ltd, Technology, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value     622 [1],[4],[11],[17] 432 [7],[8],[12],[15]              
Cost     666 [1],[4],[11],[17] 432 [7],[8],[12],[15]              
Investment, Identifier [Axis]: TA SL Cayman Aggregator Corp., Technology, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value     60 [4],[6] 65 [8]              
Cost     50 [4],[6] 50 [8]              
Investment, Identifier [Axis]: TA SL Cayman Aggregator Corp., Technology, Subordinated Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,110 [4] 1,960 [8]              
Cost     2,143 [4] 1,957 [8]              
Investment, Identifier [Axis]: TANQUERAY BIDCO LIMITED, Technology. First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[23]     1,557                
Cost [1],[4],[11],[23]     1,486                
Investment, Identifier [Axis]: TSM II Luxco 10 SARL, Chemical & Plastics, Senior Subordinated Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11]     11,118                
Cost [1],[4],[11]     11,434                
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,681 0              
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     177 0              
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     591                
Cost [1],[4],[10]     591                
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Technology, Partnership Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6]     5                
Cost [4],[6]     5                
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Technology, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     (4)                
Cost [1],[4],[10]     (4)                
Investment, Identifier [Axis]: Tank Holding Corp, Metal & Glass Containers, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[21]     10,877                
Cost [1],[4],[21]     10,876                
Investment, Identifier [Axis]: Tank Holding Corp, Metal & Glass Containers, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[21]     157                
Cost [1],[4],[21]     157                
Investment, Identifier [Axis]: Tank Holding Corp, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     698 0              
Investment, Identifier [Axis]: Tanqueray Bidco Limited, Capex Facility                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,088 0              
Investment, Identifier [Axis]: Team Car Care, LLC, Automotive, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[4],[5]     11,970                
Cost [1],[2],[4],[5]     12,104                
Investment, Identifier [Axis]: Team Services Group, Services: Consumer, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[4],[18]     9,345                
Cost [1],[2],[4],[18]     9,837                
Investment, Identifier [Axis]: Team Services Group, Services: Consumer, Second Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[4],[18]     4,700                
Cost [1],[2],[4],[18]     4,975                
Investment, Identifier [Axis]: Techone B.V., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 1,621              
Investment, Identifier [Axis]: Techone B.V., Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     203 432              
Investment, Identifier [Axis]: Techone B.V., Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     3,578 [1],[4],[11],[13] 8,441 [7],[8],[12],[22]              
Cost     3,788 [1],[4],[11],[13] 8,428 [7],[8],[12],[22]              
Investment, Identifier [Axis]: Techone B.V., Technology, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value     281 [1],[4],[11],[13] 97 [7],[8],[12],[22]              
Cost     296 [1],[4],[11],[13] 97 [7],[8],[12],[22]              
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC, Capital Equipment, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9]       5,374              
Cost [7],[8],[9]       5,375              
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC, Capital Equipment, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5]     871                
Cost [1],[4],[5]     869                
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC, Capital Equipment, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5]     5,368                
Cost [1],[4],[5]     5,349                
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC, Capital Equipment, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value     (13) [1],[4],[5] (20) [7],[8],[9]              
Cost     (16) [1],[4],[5] (20) [7],[8],[9]              
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 886              
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,129 1,129              
Investment, Identifier [Axis]: Terrybear, Inc., Consumer Products, Partnership Equity                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6]     255                
Cost [4],[6]     239                
Investment, Identifier [Axis]: Terrybear, Inc., Consumer Products, Subordinated Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4]     259                
Cost [4]     259                
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), Brokerage, Asset Managers & Exchanges, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     798 [1],[4],[5] 776 [7],[8],[9]              
Cost     779 [1],[4],[5] 776 [7],[8],[9]              
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), Brokerage, Asset Managers & Exchanges, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value     (9) [1],[4],[5] (14) [7],[8],[9]              
Cost     (12) [1],[4],[5] (14) [7],[8],[9]              
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), Brokerage, Asset Managers & Exchanges, Subordinated Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     3,380 [1],[4],[18] 3,267 [8]              
Cost     3,366 [1],[4],[18] 3,268 [8]              
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,811 2,811              
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     827 827              
Investment, Identifier [Axis]: The Cleaver-Brooks Company, Inc., Industrial Equipment, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[21]     25,979                
Cost [1],[4],[21]     25,927                
Investment, Identifier [Axis]: The Cleaver-Brooks Company, Inc., Industrial Equipment, Subordinated Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4]     5,547                
Cost [4]     5,536                
Investment, Identifier [Axis]: The Cleaver-Brooks Company, Inc., Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,826 0              
Investment, Identifier [Axis]: The Hilb Group, LLC, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,182 2,773              
Investment, Identifier [Axis]: The Hilb Group, LLC, Insurance Brokerage, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,578 [1],[4],[17] 19,874 [7],[8],[9]              
Cost     1,598 [1],[4],[17] 19,880 [7],[8],[9]              
Investment, Identifier [Axis]: The Hilb Group, LLC, Insurance Brokerage, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value     5,560 [1],[4],[17] (2) [7],[8],[9]              
Cost     5,558 [1],[4],[17] (1) [7],[8],[9]              
Investment, Identifier [Axis]: The Hilb Group, LLC, Insurance Brokerage, First Lien Senior Secured Term Loan 3                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[17]     14,178                
Cost [1],[4],[17]     14,183                
Investment, Identifier [Axis]: The Octave Music Group, Inc., Media: Diversified & Production, Partnership Equity                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6]     1,019                
Cost [4],[6]     677                
Investment, Identifier [Axis]: The Octave Music Group, Inc., Media: Diversified & Production, Second Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     12,322                
Cost [1],[4],[10]     12,289                
Investment, Identifier [Axis]: Thompson Rivers LLC                      
Summary of Investment Holdings [Line Items]                      
Total contributed capital                   $ 75,000  
Investment, Identifier [Axis]: Thompson Rivers LLC, Investment Funds & Vehicles                      
Summary of Investment Holdings [Line Items]                      
Fair Value [12]       84,438              
Cost [12]       79,414              
Investment, Identifier [Axis]: Thompson Rivers LLC, Investment Funds & Vehicles, 16.0% Member Interest                      
Summary of Investment Holdings [Line Items]                      
Fair Value [11]     30,339                
Cost [11]     46,622                
Investment, Identifier [Axis]: Thompson Rivers LLC, Member Interest                      
Summary of Investment Holdings [Line Items]                      
Fair Value     30,339 84,438 10,012            
Investment, Identifier [Axis]: Thompsonn Rivers LLC                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 0              
Total contributed capital     79,411 79,414              
Investment, Identifier [Axis]: Total Safety U.S. Inc., Diversified Support Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[19]       6,482              
Cost [7],[19]       6,393              
Investment, Identifier [Axis]: Total Safety U.S. Inc., Diversified Support Services, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[5]     5,801                
Cost [1],[5]     5,996                
Investment, Identifier [Axis]: Total Safety U.S. Inc., Diversified Support Services, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5]     3,561                
Cost [1],[4],[5]     3,561                
Investment, Identifier [Axis]: Trader Corporation, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     345 0              
Investment, Identifier [Axis]: Trader Corporation, Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[53]     4,486                
Cost [1],[4],[11],[53]     4,450                
Investment, Identifier [Axis]: Trader Corporation, Technology, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[53]     (9)                
Cost [1],[4],[11],[53]     (9)                
Investment, Identifier [Axis]: Transit Technologies LLC, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 1,857              
Investment, Identifier [Axis]: Transit Technologies LLC, Software, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     5,872 [1],[4],[18] 5,846 [7],[8],[9]              
Cost     5,987 [1],[4],[18] 5,946 [7],[8],[9]              
Investment, Identifier [Axis]: Transportation Insight, LLC, Air Freight & Logistics, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     11,032 [1],[4],[5] 11,160 [7],[8],[15]              
Cost     11,161 [1],[4],[5] 11,260 [7],[8],[15]              
Investment, Identifier [Axis]: Trident Maritime Systems, Inc., Aerospace & Defense, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     14,570 [1],[4],[5] 14,888 [7],[8],[9]              
Cost     14,597 [1],[4],[5] 14,665 [7],[8],[9]              
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Automotive Parts & Equipment, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     18,756 [1],[4],[10] 14,611 [7],[8],[9]              
Cost     19,017 [1],[4],[10] 14,623 [7],[8],[9]              
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     0 4,540              
Investment, Identifier [Axis]: True Religion Apparel, Inc., Retail, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[4],[6]     0                
Cost [2],[4],[6]     0                
Investment, Identifier [Axis]: True Religion Apparel, Inc., Retail, Preferred Unit                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[4],[6]     0                
Cost [2],[4],[6]     0                
Investment, Identifier [Axis]: Trystar, LLC, Power Distribution Solutions, Class A LLC Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     512 [4],[6] 412 [8]              
Cost     481 [4],[6] 481 [8]              
Investment, Identifier [Axis]: Trystar, LLC, Power Distribution Solutions, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9]       11,778              
Cost [7],[8],[9]       11,777              
Investment, Identifier [Axis]: Trystar, LLC, Power Distribution Solutions, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[18]     3,075                
Cost [1],[4],[18]     3,094                
Investment, Identifier [Axis]: Trystar, LLC, Power Distribution Solutions, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5]     3,750                
Cost [1],[4],[5]     3,765                
Investment, Identifier [Axis]: Turbo Buyer, Inc., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,350 2,070              
Investment, Identifier [Axis]: Turbo Buyer, Inc., Finance Companies, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     8,061 [1],[4],[5] 8,220 [7],[8],[9]              
Cost     8,187 [1],[4],[5] 8,226 [7],[8],[9]              
Investment, Identifier [Axis]: Turf Products, LLC, Landscaping & Irrigation Equipment Distributor, Senior Subordinated Debt                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8],[35]       8,627              
Cost [8],[35]       8,384              
Investment, Identifier [Axis]: Turnberry Solutions, Inc., Consumer Cyclical, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,900 [1],[4],[10] 4,423 [7],[8],[9]              
Cost     4,900 [1],[4],[10] 4,406 [7],[8],[9]              
Investment, Identifier [Axis]: U.S. Gas & Electric, Inc., Energy Services, Second Lien Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8],[35]       1,785              
Cost [8],[35]       1,785              
Investment, Identifier [Axis]: U.S. Gas & Electric, Inc., Energy Services, Second Lien Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [8],[35],[54]       0              
Cost [8],[35],[54]       0              
Investment, Identifier [Axis]: U.S. Silica Company, Metal & Glass Containers, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,439 [1],[11],[17] 1,437 [7],[12],[15]              
Cost     1,457 [1],[11],[17] 1,474 [7],[12],[15]              
Investment, Identifier [Axis]: UKFast Leaders Limited, Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     9,677 [1],[4],[11],[23] 12,090 [7],[8],[12],[28]              
Cost     11,441 [1],[4],[11],[23] 11,399 [7],[8],[12],[28]              
Investment, Identifier [Axis]: USLS Acquisition, Inc. (f/k/a US Legal Support, Inc.), Legal Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9]       16,222              
Cost [7],[8],[9]       16,065              
Investment, Identifier [Axis]: USLS Acquisition, Inc. (f/k/a US Legal Support, Inc.), Legal Services, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     15,390                
Cost [1],[4],[10]     16,045                
Investment, Identifier [Axis]: USLS Acquisition, Inc., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     3,629 0              
Investment, Identifier [Axis]: Union Bidco Limited, Acquisition Facility                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     78 0              
Investment, Identifier [Axis]: Union Bidco Limited, Healthcare, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[23]     847                
Cost [1],[4],[11],[23]     870                
Investment, Identifier [Axis]: United Therapy Holding III GmbH, Acquisition Facility                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,170 0              
Investment, Identifier [Axis]: United Therapy Holding III GmbH, Healthcare, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[20]     1,180                
Cost [1],[4],[11],[20]     1,184                
Investment, Identifier [Axis]: Utac Ceram, Business Services, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,585 [1],[4],[11],[13] 1,673 [7],[8],[12],[22]              
Cost     1,712 [1],[4],[11],[13] 1,706 [7],[8],[12],[22]              
Investment, Identifier [Axis]: Utac Ceram, Business Services, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value     3,483 [1],[4],[5],[11] 3,451 [7],[8],[9],[12]              
Cost     3,465 [1],[4],[5],[11] 3,456 [7],[8],[9],[12]              
Investment, Identifier [Axis]: VOYA CLO 2015-2, LTD., Multi-Sector Holdings, Subordinated Structured Notes                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[11]     91                
Cost [2],[11]     2,930                
Investment, Identifier [Axis]: VOYA CLO 2016-2, LTD., Multi-Sector Holdings, Subordinated Structured Notes                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[11]     1,551                
Cost [2],[11]     3,301                
Investment, Identifier [Axis]: Validity, Inc., IT Consulting & Other Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,673 [1],[4],[17] 4,764 [7],[8],[15]              
Cost     4,713 [1],[4],[17] 4,687 [7],[8],[15]              
Investment, Identifier [Axis]: Velocity Pooling Vehicle, LLC, Automotive, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[4],[6]     2                
Cost [2],[4],[6]     60                
Investment, Identifier [Axis]: Velocity Pooling Vehicle, LLC, Automotive, Warrants                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[4],[6]     3                
Cost [2],[4],[6]     72                
Investment, Identifier [Axis]: Victoria Bidco Limited, Industrial Machinery, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[26]     3,238                
Cost [1],[4],[11],[26]     3,640                
Investment, Identifier [Axis]: Victoria Bidco Limited, Industrial Machinery, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[23]     407                
Cost [1],[4],[11],[23]     411                
Investment, Identifier [Axis]: Vision Solutions Inc., Business Equipment & Services, Second Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[5]     4,771                
Cost [1],[2],[5]     6,497                
Investment, Identifier [Axis]: VistaJet Pass Through Trust 2021-1B, Airlines, Structured Secured Note - Class B                      
Summary of Investment Holdings [Line Items]                      
Fair Value     3,792 [4] 4,905              
Cost     4,643 [4] 5,000              
Investment, Identifier [Axis]: Vital Buyer, LLC, Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     7,645 [1],[4],[5] 7,676 [7],[8],[9]              
Cost     7,520 [1],[4],[5] 7,656 [7],[8],[9]              
Investment, Identifier [Axis]: Vital Buyer, LLC, Technology, Partnership Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value     293 [4],[6] 171 [8]              
Cost     164 [4],[6] 164 [8]              
Investment, Identifier [Axis]: W2O Holdings, Inc., Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,622 3,832              
Investment, Identifier [Axis]: W2O Holdings, Inc., Healthcare Technology, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [7],[8],[9]       2,152              
Cost [7],[8],[9]       2,090              
Investment, Identifier [Axis]: W2O Holdings, Inc., Healthcare Technology, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5]     3,302                
Cost [1],[4],[5]     3,301                
Investment, Identifier [Axis]: WWEC Holdings III CORP, Capital Goods, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     13,937                
Cost [1],[4],[10]     13,956                
Investment, Identifier [Axis]: WWEC Holdings III CORP, Capital Goods, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[10]     1,056                
Cost [1],[4],[10]     1,059                
Investment, Identifier [Axis]: WWEC Holdings III CORP, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     3,106 0              
Investment, Identifier [Axis]: WWEC Holdings III CORP, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,366 0              
Investment, Identifier [Axis]: Waccamaw River LLC                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,480 11,280              
Fair Value       13,501 0            
Total contributed capital     27,800 19,000         $ 25,000    
Total return of capital (recallable)     5,280 5,280              
Investment, Identifier [Axis]: Waccamaw River LLC Capital Commitment - Funded                      
Summary of Investment Holdings [Line Items]                      
Total contributed capital     22,500                
Investment, Identifier [Axis]: Waccamaw River LLC, Investment Funds & Vehicles                      
Summary of Investment Holdings [Line Items]                      
Fair Value [12]       13,501              
Cost [12]       13,720              
Investment, Identifier [Axis]: Waccamaw River LLC, Investment Funds & Vehicles, 20% Member Interest                      
Summary of Investment Holdings [Line Items]                      
Fair Value [11]     20,212                
Cost [11]     22,520                
Investment, Identifier [Axis]: Waccamaw River LLC, Member Interest                      
Summary of Investment Holdings [Line Items]                      
Fair Value     20,212 13,501              
Investment, Identifier [Axis]: Waccamaw River, Joint Venture                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,480 11,280              
Investment, Identifier [Axis]: Walker Edison Furniture Company LLC, Consumer Goods: Durable, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[4],[6]     0                
Cost [2],[4],[6]     3,598                
Investment, Identifier [Axis]: Watermill-QMC Midco, Inc., Automotive, Equity (1.62% Partnership Interest)                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[4],[6]     0                
Cost [2],[4],[6]     0                
Investment, Identifier [Axis]: Wawona Delaware Holdings, LLC, Beverage & Food, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [2],[5]     33                
Cost [2],[5]     41                
Investment, Identifier [Axis]: Wheels Up Experience Inc, Transportation Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4]     13,153                
Cost [4]     12,973                
Investment, Identifier [Axis]: Wok Holdings Inc., Retail, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[2],[5]     41                
Cost [1],[2],[5]     48                
Investment, Identifier [Axis]: Woodland Foods, Inc., Line of Credit                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     456 2,070              
Investment, Identifier [Axis]: Woodland Foods, LLC, Food & Beverage, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,012 [4],[6] 1,663 [8]              
Cost     1,663 [4],[6] 1,663 [8]              
Investment, Identifier [Axis]: Woodland Foods, LLC, Food & Beverage, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value     4,882 [1],[4],[5] 11,282 [7],[8],[9]              
Cost     5,350 [1],[4],[5] 11,285 [7],[8],[9]              
Investment, Identifier [Axis]: Woodland Foods, LLC, Food & Beverage, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,556 [1],[4],[5] 127 [7],[8],[9]              
Cost     1,748 [1],[4],[5] 128 [7],[8],[9]              
Investment, Identifier [Axis]: World 50, Inc., Professional Services, First Lien Senior Secured Term Loan 1                      
Summary of Investment Holdings [Line Items]                      
Fair Value     8,821 [1],[4],[17] 3,280 [7],[8],[15]              
Cost     8,795 [1],[4],[17] 3,202 [7],[8],[15]              
Investment, Identifier [Axis]: World 50, Inc., Professional Services, First Lien Senior Secured Term Loan 2                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,428 [1],[4],[17] 8,872 [7],[8],[15]              
Cost     2,423 [1],[4],[17] 8,852 [7],[8],[15]              
Investment, Identifier [Axis]: Xeinadin Bidco Limited, CAF Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     3,109 0              
Investment, Identifier [Axis]: Xeinadin Bidco Limited, Financial Other, Common Stock                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6],[11]     549                
Cost [4],[6],[11]     565                
Investment, Identifier [Axis]: Xeinadin Bidco Limited, Financial Other, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[23]     5,446                
Cost [1],[4],[11],[23]     5,586                
Investment, Identifier [Axis]: Xeinadin Bidco Limited, Financial Other, Subordinated Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[11]     2,502                
Cost [4],[11]     2,553                
Investment, Identifier [Axis]: ZB Holdco LLC, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,352 0              
Investment, Identifier [Axis]: ZB Holdco LLC, Food & Beverage, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5]     2,628                
Cost [1],[4],[5]     2,623                
Investment, Identifier [Axis]: ZB Holdco LLC, Food & Beverage, LLC Units                      
Summary of Investment Holdings [Line Items]                      
Fair Value [4],[6]     189                
Cost [4],[6]     153                
Investment, Identifier [Axis]: ZB Holdco LLC, Food & Beverage, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[5]     (12)                
Cost [1],[4],[5]     (14)                
Investment, Identifier [Axis]: ZB Holdco LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     845 0              
Investment, Identifier [Axis]: Zeppelin Bidco Limited, Capex / Acquisition Facility                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     2,516 0              
Investment, Identifier [Axis]: Zeppelin Bidco Limited, Services: Business, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[11],[36]     5,162                
Cost [1],[4],[11],[36]     6,149                
Investment, Identifier [Axis]: eShipping, LLC, Delayed Draw Term Loan                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,650 2,548              
Investment, Identifier [Axis]: eShipping, LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     1,486 1,232              
Investment, Identifier [Axis]: eShipping, LLC, Transportation Services, First Lien Senior Secured Term Loan                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[17]     3,262                
Cost [1],[4],[17]     3,209                
Investment, Identifier [Axis]: eShipping, LLC, Transportation Services, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value [1],[4],[17]     (9)                
Cost [1],[4],[17]     (24)                
MVC Acquisition                      
Summary of Investment Holdings [Line Items]                      
Purchases of portfolio investments         185,000            
Sierra Merger                      
Summary of Investment Holdings [Line Items]                      
Purchases of portfolio investments     442,200                
Level 3                      
Summary of Investment Holdings [Line Items]                      
Fair Value     2,127,521 1,520,038              
Unrealized gain (loss)     (45,300) (3,800)              
Jocassee Partners LLC                      
Summary of Investment Holdings [Line Items]                      
Repayments received/sales of portfolio investments     875,900 698,500              
Gain (loss) on sale of investments     (5,600) (1,400)              
Due from related parties     18,200 216,900              
MassMutual Ascend Life Insurance Company                      
Summary of Investment Holdings [Line Items]                      
Number of members | member 2                    
Line of Credit                      
Summary of Investment Holdings [Line Items]                      
Long-term debt, gross     729,144 655,189              
Jocassee Partners LLC                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing             $ 50,000       $ 50,000
Fair Value     $ 1,209,063 $ 1,245,647              
Interest-earning assets, average yield     8.60% 5.30%              
Dividends     $ 15,700                
Total dividend income     1,400                
Thompson Rivers LLC                      
Summary of Investment Holdings [Line Items]                      
Fair Value     890,911 $ 3,063,035              
Cost     949,279 3,024,529              
Total dividend income     9,100 $ 4,800              
Distributions of realized gains by controlled investment companies     $ 32,800                
Investment owned, outstanding loans | loan     5,414 15,617              
Investment owned, average unpaid balance     $ 200 $ 200              
Investment owned, weighted average coupon rate     4.00% 4.00%              
Thompson Rivers LLC | JPMorgan Chase Bank                      
Summary of Investment Holdings [Line Items]                      
Repurchase agreement counterparty, amount at risk     $ 224,200 $ 694,800              
Thompson Rivers LLC | Bank of America N.A.,                      
Summary of Investment Holdings [Line Items]                      
Repurchase agreement counterparty, amount at risk     428,000 1,245,200              
Thompson Rivers LLC | Barclays Bank                      
Summary of Investment Holdings [Line Items]                      
Repurchase agreement counterparty, amount at risk     184,200 933,100              
Waccamaw River, LLC                      
Summary of Investment Holdings [Line Items]                      
Total dividend income     $ 1,900 $ 300              
Investment owned, outstanding loans | loan     18,335 5,500              
Investment company, remaining average life to maturity     44 months 46 months 15 days              
Average loan amount     $ 11,542 $ 11,280              
Investment company, weighted average interest rate     12.00% 10.90%              
Sierra JV                      
Summary of Investment Holdings [Line Items]                      
Fair Value     $ 110,047                
Cost     125,220                
Total dividend income     4,500                
Distributions of realized gains by controlled investment companies     $ 35,700                
Weighted average yield     9.20%                
SCRS | Investment, Identifier [Axis]: Jocassee Partners LLC                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing                     $ 500,000
Jocassee Partners LLC | Bank Of America Subscription Facility | Subscription Facility | Line of Credit                      
Summary of Investment Holdings [Line Items]                      
Borrowings under credit facilities     $ 174,300 $ 176,300              
Jocassee Partners LLC | Citibank N.A. Subscription Facility | Subscription Facility | Line of Credit                      
Summary of Investment Holdings [Line Items]                      
Borrowings under credit facilities     357,900 342,800              
Jocassee Partners LLC | Term Debt Securitization | Subscription Facility | Line of Credit                      
Summary of Investment Holdings [Line Items]                      
Borrowings under credit facilities     323,300 323,100              
All Members Of Jocassee Partners LLC | Investment, Identifier [Axis]: Jocassee Partners LLC                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     215 220,000              
Total contributed capital     385 330,000              
Thompson Rivers LLC                      
Summary of Investment Holdings [Line Items]                      
Total contributed capital     450,000                
Dividends     261,900 37,500              
All Member Of Waccamaw River LLC                      
Summary of Investment Holdings [Line Items]                      
Total contributed capital     125,000                
All Member Of Waccamaw River LLC | Investment, Identifier [Axis]: Waccamaw River LLC                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     12,400 56,400              
Total contributed capital     126,620 82,620              
Total return of capital (recallable)     14,020 14,020              
All Member Of Waccamaw River LLC | Investment, Identifier [Axis]: Waccamaw River LLC | Affiliated Entity                      
Summary of Investment Holdings [Line Items]                      
Total unused commitments to extend financing     7,400 33,800              
Total return of capital (recallable)     7,000                
All Member Of Waccamaw River LLC | Investment, Identifier [Axis]: Waccamaw River LLC Capital Commitment - Funded                      
Summary of Investment Holdings [Line Items]                      
Total contributed capital     112,600                
Waccamaw River, LLC                      
Summary of Investment Holdings [Line Items]                      
Dividends     9,300 1,400              
Waccamaw River, LLC | JPMorgan Chase Bank N.A. Non-Recourse Loan | Secured Debt                      
Summary of Investment Holdings [Line Items]                      
Long-term debt, gross     72,300                
Waccamaw River, LLC | Barclay Bank PLC Non-Recourse Loan | Secured Debt                      
Summary of Investment Holdings [Line Items]                      
Long-term debt, gross     44,800                
All Members Of Sierra JV                      
Summary of Investment Holdings [Line Items]                      
Number of members | member 4                    
All Members Of Sierra JV | Investment, Identifier [Axis]: Sierra Senior Loan Strategy JV LLC (Sierra JV)                      
Summary of Investment Holdings [Line Items]                      
Total contributed capital     124,500                
MMALIC | Investment, Identifier [Axis]: Sierra Senior Loan Strategy JV LLC (Sierra JV)                      
Summary of Investment Holdings [Line Items]                      
Total contributed capital     14,500                
Sierra JV                      
Summary of Investment Holdings [Line Items]                      
Dividends     45,200                
Sierra JV | Revolving Credit Facility | Line of Credit                      
Summary of Investment Holdings [Line Items]                      
Borrowings under credit facilities     75,000                
Existing Portfolio                      
Summary of Investment Holdings [Line Items]                      
Purchases of portfolio investments     258,500 234,000 114,600            
Investment in joint ventures                      
Summary of Investment Holdings [Line Items]                      
Purchases of portfolio investments     13,800 13,700 10,000            
Investment in joint ventures | Jocassee Partners LLC                      
Summary of Investment Holdings [Line Items]                      
Fair Value     61,028 127,092              
Cost     75,941 111,490              
Equity Co-Investments                      
Summary of Investment Holdings [Line Items]                      
Purchases of portfolio investments       89,800              
Joint Venture Equity Portfolio Companies                      
Summary of Investment Holdings [Line Items]                      
Purchases of portfolio investments       79,400 10,000            
Long-Term Investment                      
Summary of Investment Holdings [Line Items]                      
Purchases of portfolio investments     1,162,247 1,461,057 881,171            
Repayments received/sales of portfolio investments     1,041,370 943,867 $ 684,531            
Long-Term Investment | Jocassee Partners LLC                      
Summary of Investment Holdings [Line Items]                      
Fair Value     1,219,889 1,258,219              
Cost     1,296,355 1,242,219              
Ginnie Mae Early Buyout Loans | Thompson Rivers LLC                      
Summary of Investment Holdings [Line Items]                      
Fair Value     890,900 3,100,000              
Consumer Loan | Waccamaw River, LLC                      
Summary of Investment Holdings [Line Items]                      
Fair Value     200,500 60,800              
Cash and Cash Equivalents | Thompson Rivers LLC                      
Summary of Investment Holdings [Line Items]                      
Fair Value     65,100 220,600              
Cash and Cash Equivalents | Waccamaw River, LLC                      
Summary of Investment Holdings [Line Items]                      
Fair Value     8,000 4,900              
Unfunded Securities | Investment, Identifier [Axis]: Eclipse Business Capital Holdings LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value           $ 22,700   $ 13,600      
Funded Securities | Investment, Identifier [Axis]: Eclipse Business Capital Holdings LLC, Revolver                      
Summary of Investment Holdings [Line Items]                      
Fair Value     5,300 1,800              
Revolving Line Of Credit | Minimum | Eclipse Business Capital Holdings LLC                      
Summary of Investment Holdings [Line Items]                      
Investment owned, face amount     10,000                
Revolving Line Of Credit | Maximum | Eclipse Business Capital Holdings LLC                      
Summary of Investment Holdings [Line Items]                      
Investment owned, face amount     125,000                
Investments With No Previous Contractual Commitment To Provide Financing                      
Summary of Investment Holdings [Line Items]                      
Purchases of portfolio investments     1,529,600                
Investment With Previous Commitment To Provide FInancing                      
Summary of Investment Holdings [Line Items]                      
Purchases of portfolio investments     $ 83,600                
Investment, Excluding Short Term Investment, With No Previous Commitment To Provide Financing                      
Summary of Investment Holdings [Line Items]                      
Purchases of portfolio investments       1,410,500              
Investment, Excluding Short Term Investment, With Previous Commitment To Provide Financing                      
Summary of Investment Holdings [Line Items]                      
Purchases of portfolio investments       $ 70,000              
[1] Debt investment includes interest rate floor feature.
[2] Investment was purchased as part of the Sierra Merger and is part of the Sierra Reference Portfolio for purposes of the Sierra Credit Support Agreement.
[3] Non-accrual investment.
[4] The fair value of the investment was determined using significant unobservable inputs.
[5] The interest rate on these loans is subject to 3 Month LIBOR, which as of December 31, 2022 was 4.76729%.
[6] Investment is non-income producing.
[7] Debt investment includes interest rate floor feature.
[8] The fair value of the investment was determined using significant unobservable inputs.
[9] The interest rate on these loans is subject to 3 Month LIBOR, which as of December 31, 2021 was 0.20913%.
[10] The interest rate on these loans is subject to 3 Month SOFR, which as of December 31, 2022 was 4.58745%.
[11] Investment is not a qualifying investment as defined under Section 55(a) of the 1940 Act. Non-qualifying assets represent 25.9% of total investments at fair value as of December 31, 2022. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets. If at any time qualifying assets do not represent at least 70% of the Company's total assets, the Company will be precluded from acquiring any additional non-qualifying asset until such time as it complies with the requirements of Section 55(a).
[12] Investment is not a qualifying investment as defined under Section 55(a) of the 1940 Act. Non-qualifying assets represent 25.7% of total investments at fair value as of December 31, 2021. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets. If at any time qualifying assets do not represent at least 70% of the Company’s total assets, the Company will be precluded from acquiring any additional non-qualifying asset until such time as it complies with the requirements of Section 55(a).
[13] The interest rate on these loans is subject to 3 Month EURIBOR, which as of December 31, 2022 was 2.13200%.
[14] The interest rate on these loans is subject to 1 Month BBSY, which as of December 31, 2022 was 3.01500%.
[15] The interest rate on these loans is subject to 1 Month LIBOR, which as of December 31, 2021 was 0.10125%.
[16] The interest rate on these loans is subject to 6 Month SOFR, which as of December 31, 2022 was 4.78131%.
[17] The interest rate on these loans is subject to 1 Month LIBOR, which as of December 31, 2022 was 4.39157%.
[18] The interest rate on these loans is subject to 6 Month LIBOR, which as of December 31, 2022 was 5.13886%.
[19] The interest rate on these loans is subject to 6 Month LIBOR, which as of December 31, 2021 was 0.33875%.
[20] The interest rate on these loans is subject to 6 Month EURIBOR, which as of December 31, 2022 was 2.69300%.
[21] The interest rate on these loans is subject to 1 Month SOFR, which as of December 31, 2022 was 4.35806%.
[22] The interest rate on these loans is subject to 3 Month EURIBOR, which as of December 31, 2021 was -0.57200%.
[23] The interest rate on these loans is subject to 3 Month SONIA, which as of December 31, 2022 was 3.75470%.
[24] The interest rate on these loans is subject to 3 Month GBP LIBOR, which as of December 31, 2021 was 0.26225%.
[25] The interest rate on these loans is subject to 1 Month EURIBOR, which as of December 31, 2022 was 1.88400%.
[26] The interest rate on these loans is subject to 6 Month SONIA, which as of December 31, 2022 was 4.09490%.
[27] The interest rate on these loans is subject to 6 Month SONIA, which as of December 31, 2021 was 0.49870%.
[28] The interest rate on these loans is subject to 3 Month SONIA, which as of December 31, 2021 was 0.33830%.
[29] The interest rate on these loans is subject to 6 Month EURIBOR, which as of December 31, 2021 was -0.54600%.
[30] The interest rate on these loans is subject to 6 Month BBSY, which as of December 31, 2022 was 3.76500%.
[31] The interest rate on these loans is subject to 3 Month BBSY, which as of December 31, 2021 was 0.06770%.
[32] The interest rate on these loans is subject to 3 Month STIBOR, which as of December 31, 2022 was 2.70100%.
[33] The interest rate on these loans is subject to 3 Month STIBOR, which as of December 31, 2021 was -0.00050%.
[34] The interest rate on these loans is subject to 6 Month GBP LIBOR, which as of December 31, 2021 was 0.47363%.
[35] Investment was purchased as part of the MVC Acquisition and is part of the MVC Reference Portfolio for purposes of the MVC Credit Support Agreement.
[36] The interest rate on these loans is subject to 1 Month SONIA, which as of December 31, 2022 was 3.43570%.
[37] The interest rate on these loans is subject to 3 Month SOFR, which as of December 31, 2021 was 0.09125%.
[38] The interest rate on these loans is subject to 3 Month CDOR, which as of December 31, 2022 was 4.93500%.
[39] The interest rate on these loans is subject to 3 Month CDOR, which as of December 31, 2021 was 0.51750%.
[40] Investment was purchased as part of the MVC Acquisition and is part of the MVC Reference Portfolio for purposes of the MVC Credit Support Agreement.
[41] Non-accrual investment.
[42] As defined in the 1940 Act, the Company is deemed to be an “affiliated person” of the portfolio company as the Company owns between 5% or more, up to 25% (inclusive), of the portfolio company’s voting securities (“non-controlled affiliate”). Transactions related to investments in non-controlled "Affiliate Investments" for the year ended December 31, 2021 were as follows:
December 31, 2020 ValueGross Additions
(b)
Gross Reductions (c)Amount of Realized Gain (Loss)Amount of Unrealized Gain (Loss)December 31, 2021 ValueAmount of Interest or Dividends Credited to Income(d)
Portfolio Company(6)Type of Investment(a)
Advantage Insurance, Inc.(e)
Preferred Stock (587,001 shares)
$5,947 $— $(5,870)$(77)$— $— $72 
5,947 — (5,870)(77)— — 72 
Eclipse Business Capital, LLC (e)
Second Lien Senior Secured Term Loan (7.5% Cash)
— 4,502 — — 236 4,738 170 
Revolver (LIBOR + 7.25%)
— 1,691 — — 127 1,818 53 
LLC units (89,447,396 units)
— 89,850 — — 2,818 92,668 3,582 
— 96,043 — — 3,181 99,224 3,805 
Jocassee Partners LLC
9.1% Member Interest
22,624 10,000 — — 4,977 37,601 — 
22,624 10,000 — — 4,977 37,601 — 
JSC Tekers Holdings(e)
Preferred Stock (9,159,085 shares)
4,753 — — — 1,444 6,197 — 
Common Stock (3,201 shares)
— — — — — — — 
4,753 — — — 1,444 6,197 — 
Security Holdings B.V(e)
Bridge Loan (5.0% PIK 5/31/2021)
5,188 263 — — — 5,451 276 
Senior Subordinated Loan (3.1% PIK)
8,746 779 — — — 9,525 285 
Senior Unsecured Term Loan (9.0% PIK)
— 8,831 (1,168)(24)(332)7,307 820 
Common Equity Interest21,329 — — — 3,496 24,825 — 
35,263 9,873 (1,168)(24)3,164 47,108 1,381 
Thompson Rivers LLC
15.90% Member Interest
10,012 69,414 — — 5,012 84,438 4,776 
10,012 69,414 — — 5,012 84,438 4,776 
Waccamaw River LLC
20% Member Interest
— 13,763 (68)— (194)13,501 280 
— 13,763 (68)— (194)13,501 280 
Total Affiliate Investments$78,599 $199,093 $(7,106)$(101)$17,584 $288,069 $10,314 
(a)     Eclipse Business Capital, LLC, Thompson Rivers LLC and Waccamaw River LLC equity investments are income producing. All other equity and any equity-linked investments are non-income producing.
(b) Gross additions include increases in the cost basis of investments resulting from new investments and follow-on investments.
(c)    Gross reductions include decreases in the total cost basis of investments resulting from principal repayments or sales.
(d) Represents the total amount of interest, fees or dividends credited to income for the portion of the year an investment was included in the Affiliate category.
(e) The fair value of the investment was determined using significant unobservable inputs.
[43] The interest rate on these loans is subject to 3 Month BBSY, which as of December 31, 2022 was 3.26470%.
[44] The interest rate on these loans is subject to 3 Month BKBM, which as of December 31, 2022 was 4.53000%.
[45] As defined in the 1940 Act, the Company is deemed to be both an “affiliated person” and “control” the portfolio company because it owns more than 25% of the portfolio company’s outstanding voting securities or it has the power to exercise control over the management or policies of such portfolio company (including through a management agreement). Transactions as of and during the year ended December 31, 2021 in which the portfolio company is deemed to be a "Control Investment" of the Company were as follows:
December 31, 2020 ValueGross Additions
(b)
Gross Reductions (c)Amount of Realized Gain (Loss)Amount of Unrealized Gain (Loss)December 31, 2021 ValueAmount of Interest or Dividends Credited to Income(d)
Portfolio CompanyType of Investment(a)
MVC Automotive Group GmbH(e)
Common Equity Interest$9,582 $— $— $— $(1,883)$7,699 $— 
Bridge Loan (6.0% Cash 12/31/2021)
7,149 — — — — 7,149 435 
16,731 — — — (1,883)14,848 435 
MVC Private Equity Fund LPLimited Partnership Interest8,899 — — — (1,523)7,376 — 
General Partnership Interest225 — — (37)188 643 
9,124 — — — (1,560)7,564 643 
Waccamaw River LLC
50% Member Interest
— 4,500 (4,474)— (26)— — 
Total Control Investments$25,855 $4,500 $(4,474)$ $(3,469)$22,412 $1,078 
(a)     Equity and equity-linked investments are non-income producing, unless otherwise noted.
(b) Gross additions include increases in the cost basis of investments resulting from new investments and follow-on investments.
(c)     Gross reductions include decreases in the total cost basis of investments resulting from principal repayments or sales.
(d)    Represents the total amount of interest, fees or dividends credited to income for the portion of the year an investment was included in the Control category.
(e) The fair value of the investment was determined using significant unobservable inputs.
[46] The interest rate on these loans is subject to Prime, which as of December 31, 2022 was 7.50000%.
[47] The interest rate on these loans is subject to 1 Month NIBOR, which as of December 31, 2022 was 3.04000%.
[48] The interest rate on these loans is subject to 1 Month BBSY, which as of December 31, 2021 was 0.01500%.
[49] The interest rate on these loans is subject to 6 Month SOFR, which as of December 31, 2021 was 0.19947%.
[50] Fair value as a percentage of net assets.
[51] The interest rate on these loans is subject to 3 Month SARON, which as of December 31, 2022 was 0.94212%.
[52] All of the investment is or will be encumbered as security for the Company’s senior secured credit facility with ING Capital LLC.
[53] The interest rate on these loans is subject to 1 Month CDOR, which as of December 31, 2022 was 4.73750%.
[54] In 2017, MVC received $5.7 million of 9.5% second lien callable notes due in 2025, in lieu of an escrow to satisfy any indemnification claims associated with MVC’s sale of its equity investment in U.S. Gas. Effective January 1, 2018, the cost basis of the U.S. Gas second lien loan was decreased by approximately $3.0 million due to a working capital adjustment. This loan is still subject to indemnification adjustments.