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Commitments and Contingencies - Unfunded Commitments (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Unfunded Dent Securities    
Other Commitments [Line Items]    
Unfunded commitments $ 1,447.4 $ 1,534.1
Unfunded Asset Based Finance/Other commitments    
Other Commitments [Line Items]    
Unfunded commitments 87.5  
Investment, Identifier [Axis]: 3Pillar Global Inc    
Other Commitments [Line Items]    
Unfunded commitments 6.0  
Investment, Identifier [Axis]: 48Forty Solutions LLC    
Other Commitments [Line Items]    
Unfunded commitments 2.1  
Investment, Identifier [Axis]: A-Lign Assurance LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 3.2  
Investment, Identifier [Axis]: A-Lign Assurance LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 1.5  
Investment, Identifier [Axis]: AGS Health LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 6.0  
Investment, Identifier [Axis]: AGS Health LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 2.1  
Investment, Identifier [Axis]: Aareon AG    
Other Commitments [Line Items]    
Unfunded commitments 11.3  
Investment, Identifier [Axis]: Advanced Dermatology & Cosmetic Surgery    
Other Commitments [Line Items]    
Unfunded commitments 3.1  
Investment, Identifier [Axis]: Affordable Care Inc    
Other Commitments [Line Items]    
Unfunded commitments 0.1  
Investment, Identifier [Axis]: Alacrity Solutions Group LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 1.7  
Investment, Identifier [Axis]: Alacrity Solutions Group LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 2.3  
Investment, Identifier [Axis]: Alpha Financial Markets Consulting PLC    
Other Commitments [Line Items]    
Unfunded commitments 2.3  
Investment, Identifier [Axis]: American Vision Partners    
Other Commitments [Line Items]    
Unfunded commitments 4.7  
Investment, Identifier [Axis]: Amerivet Partners Management Inc    
Other Commitments [Line Items]    
Unfunded commitments 8.4  
Investment, Identifier [Axis]: Apex Service Partners LLC    
Other Commitments [Line Items]    
Unfunded commitments 3.8  
Investment, Identifier [Axis]: Arcfield Acquisition Corp    
Other Commitments [Line Items]    
Unfunded commitments 6.0  
Investment, Identifier [Axis]: Arcwood Environmental (fka Heritage Environmental Services Inc)    
Other Commitments [Line Items]    
Unfunded commitments 8.0  
Investment, Identifier [Axis]: Area Wide Protective Inc    
Other Commitments [Line Items]    
Unfunded commitments 12.1  
Investment, Identifier [Axis]: Avetta LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 1.8  
Investment, Identifier [Axis]: Avetta LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 0.8  
Investment, Identifier [Axis]: Avetta LLC 3    
Other Commitments [Line Items]    
Unfunded commitments 3.7  
Investment, Identifier [Axis]: BGB Group LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 3.2  
Investment, Identifier [Axis]: BGB Group LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 4.8  
Investment, Identifier [Axis]: Bond Aviation Holdings LLC, Term Loan 1    
Other Commitments [Line Items]    
Unfunded commitments 13.6  
Investment, Identifier [Axis]: Bond Aviation Holdings LLC, Term Loan 2    
Other Commitments [Line Items]    
Unfunded commitments 5.3  
Investment, Identifier [Axis]: Bonterra LLC    
Other Commitments [Line Items]    
Unfunded commitments 14.4  
Investment, Identifier [Axis]: CLEAResult Consulting Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 4.5  
Investment, Identifier [Axis]: CLEAResult Consulting Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 3.0  
Investment, Identifier [Axis]: CSafe Global    
Other Commitments [Line Items]    
Unfunded commitments 9.2  
Investment, Identifier [Axis]: Cadence Education LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 8.5  
Investment, Identifier [Axis]: Cadence Education LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 4.0  
Investment, Identifier [Axis]: Cambrex Corp 1    
Other Commitments [Line Items]    
Unfunded commitments 7.8  
Investment, Identifier [Axis]: Cambrex Corp 2    
Other Commitments [Line Items]    
Unfunded commitments 9.4  
Investment, Identifier [Axis]: Cambrex Corp 3    
Other Commitments [Line Items]    
Unfunded commitments 5.6  
Investment, Identifier [Axis]: Carrier Fire Protection 1    
Other Commitments [Line Items]    
Unfunded commitments 1.8  
Investment, Identifier [Axis]: Carrier Fire Protection 2    
Other Commitments [Line Items]    
Unfunded commitments 2.1  
Investment, Identifier [Axis]: Circana Group (f.k.a. NPD Group)    
Other Commitments [Line Items]    
Unfunded commitments 4.3  
Investment, Identifier [Axis]: Civica Group Ltd 1    
Other Commitments [Line Items]    
Unfunded commitments 5.1  
Investment, Identifier [Axis]: Civica Group Ltd 2    
Other Commitments [Line Items]    
Unfunded commitments 4.4  
Investment, Identifier [Axis]: Clarience Technologies LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 12.4  
Investment, Identifier [Axis]: Clarience Technologies LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 27.5  
Investment, Identifier [Axis]: Clarience Technologies LLC 3    
Other Commitments [Line Items]    
Unfunded commitments 1.9  
Investment, Identifier [Axis]: ClubCorp Club Operations Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 5.7  
Investment, Identifier [Axis]: ClubCorp Club Operations Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 3.4  
Investment, Identifier [Axis]: Com Laude Group Ltd 1    
Other Commitments [Line Items]    
Unfunded commitments 3.1  
Investment, Identifier [Axis]: Com Laude Group Ltd 2    
Other Commitments [Line Items]    
Unfunded commitments 1.3  
Investment, Identifier [Axis]: Com Laude Group Ltd 3    
Other Commitments [Line Items]    
Unfunded commitments 3.0  
Investment, Identifier [Axis]: Community Brands Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 4.1  
Investment, Identifier [Axis]: Community Brands Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 7.1  
Investment, Identifier [Axis]: Consilium Safety Group AB    
Other Commitments [Line Items]    
Unfunded commitments 10.5  
Investment, Identifier [Axis]: Curia Receivables II SPV LLC (FKA Curia Global Inc), Revolver    
Other Commitments [Line Items]    
Unfunded commitments 20.7  
Investment, Identifier [Axis]: Cyncly Refinancing 1    
Other Commitments [Line Items]    
Unfunded commitments 3.2  
Investment, Identifier [Axis]: Cyncly Refinancing 2    
Other Commitments [Line Items]    
Unfunded commitments 4.7  
Investment, Identifier [Axis]: Cyncly Refinancing 3    
Other Commitments [Line Items]    
Unfunded commitments 1.6  
Investment, Identifier [Axis]: DOXA Insurance Holdings LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 2.9  
Investment, Identifier [Axis]: DOXA Insurance Holdings LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 18.8  
Investment, Identifier [Axis]: Dental365 LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 4.6  
Investment, Identifier [Axis]: Dental365 LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 3.6  
Investment, Identifier [Axis]: DuBois Chemicals Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 14.7  
Investment, Identifier [Axis]: DuBois Chemicals Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 4.3  
Investment, Identifier [Axis]: Eagle Railcar Services Roscoe Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 10.8  
Investment, Identifier [Axis]: Eagle Railcar Services Roscoe Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 12.0  
Investment, Identifier [Axis]: Envirotainer Ltd    
Other Commitments [Line Items]    
Unfunded commitments 2.8  
Investment, Identifier [Axis]: Excelitas Technologies Corp 1    
Other Commitments [Line Items]    
Unfunded commitments 2.4  
Investment, Identifier [Axis]: Excelitas Technologies Corp 2    
Other Commitments [Line Items]    
Unfunded commitments 22.6  
Investment, Identifier [Axis]: Flexera Software LLC    
Other Commitments [Line Items]    
Unfunded commitments 6.5  
Investment, Identifier [Axis]: Follett Software Co    
Other Commitments [Line Items]    
Unfunded commitments 5.6  
Investment, Identifier [Axis]: Fortnox AB    
Other Commitments [Line Items]    
Unfunded commitments 9.0  
Investment, Identifier [Axis]: Foundation Consumer Brands LLC    
Other Commitments [Line Items]    
Unfunded commitments 7.7  
Investment, Identifier [Axis]: Foundation Risk Partners Corp 1    
Other Commitments [Line Items]    
Unfunded commitments 8.9  
Investment, Identifier [Axis]: Foundation Risk Partners Corp 2    
Other Commitments [Line Items]    
Unfunded commitments 6.6  
Investment, Identifier [Axis]: Frontline Road Safety LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 15.7  
Investment, Identifier [Axis]: Frontline Road Safety LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 14.3  
Investment, Identifier [Axis]: Fullsteam Holdings LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 11.0  
Investment, Identifier [Axis]: Fullsteam Holdings LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 3.7  
Investment, Identifier [Axis]: Galaxy Universal LLC    
Other Commitments [Line Items]    
Unfunded commitments 11.4  
Investment, Identifier [Axis]: Galway Partners Holdings LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 10.7  
Investment, Identifier [Axis]: Galway Partners Holdings LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 6.7  
Investment, Identifier [Axis]: Gigamon Inc    
Other Commitments [Line Items]    
Unfunded commitments 5.6  
Investment, Identifier [Axis]: Granicus Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 2.3  
Investment, Identifier [Axis]: Granicus Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 0.5  
Investment, Identifier [Axis]: GreenSky Holdings LLC, Term Loan    
Other Commitments [Line Items]    
Unfunded commitments 3.0  
Investment, Identifier [Axis]: HM Dunn Co Inc    
Other Commitments [Line Items]    
Unfunded commitments 6.0  
Investment, Identifier [Axis]: Heniff Transportation Systems LLC    
Other Commitments [Line Items]    
Unfunded commitments 3.4  
Investment, Identifier [Axis]: Higginbotham Insurance Agency Inc    
Other Commitments [Line Items]    
Unfunded commitments 1.0  
Investment, Identifier [Axis]: Highgate Hotels Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 4.2  
Investment, Identifier [Axis]: Highgate Hotels Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 3.9  
Investment, Identifier [Axis]: Homrich & Berg Inc    
Other Commitments [Line Items]    
Unfunded commitments 0.7  
Investment, Identifier [Axis]: Horizon CTS Buyer LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 15.2  
Investment, Identifier [Axis]: Horizon CTS Buyer LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 2.2  
Investment, Identifier [Axis]: Inhabit IQ 1    
Other Commitments [Line Items]    
Unfunded commitments 3.6  
Investment, Identifier [Axis]: Inhabit IQ 2    
Other Commitments [Line Items]    
Unfunded commitments 2.2  
Investment, Identifier [Axis]: Insight Global LLC    
Other Commitments [Line Items]    
Unfunded commitments 36.6  
Investment, Identifier [Axis]: Insightsoftware.Com Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 25.8  
Investment, Identifier [Axis]: Insightsoftware.Com Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 3.4  
Investment, Identifier [Axis]: Integrity Marketing Group LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 0.1  
Investment, Identifier [Axis]: Integrity Marketing Group LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 0.7  
Investment, Identifier [Axis]: J S Held LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 6.9  
Investment, Identifier [Axis]: J S Held LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 10.8  
Investment, Identifier [Axis]: Jeppesen Holdings LLC    
Other Commitments [Line Items]    
Unfunded commitments 2.4  
Investment, Identifier [Axis]: Kestra Financial Inc, Preferred Equity    
Other Commitments [Line Items]    
Unfunded commitments 9.2  
Investment, Identifier [Axis]: Keystone Agency Partners LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 8.5  
Investment, Identifier [Axis]: Keystone Agency Partners LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 3.8  
Investment, Identifier [Axis]: Laboratoires Vivacy SAS    
Other Commitments [Line Items]    
Unfunded commitments 0.6  
Investment, Identifier [Axis]: Lazer Logistics Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 1.9  
Investment, Identifier [Axis]: Lazer Logistics Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 2.3  
Investment, Identifier [Axis]: Learning Experience Corp/The    
Other Commitments [Line Items]    
Unfunded commitments 3.5  
Investment, Identifier [Axis]: Legends Hospitality LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 9.3  
Investment, Identifier [Axis]: Legends Hospitality LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 1.2  
Investment, Identifier [Axis]: Lloyd's Register Quality Assurance Ltd    
Other Commitments [Line Items]    
Unfunded commitments 5.6  
Investment, Identifier [Axis]: MAI Capital Management LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 2.7  
Investment, Identifier [Axis]: MAI Capital Management LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 4.3  
Investment, Identifier [Axis]: MB2 Dental Solutions LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 23.2  
Investment, Identifier [Axis]: MB2 Dental Solutions LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 8.8  
Investment, Identifier [Axis]: Magna Legal Services LLC    
Other Commitments [Line Items]    
Unfunded commitments 2.2  
Investment, Identifier [Axis]: Med-Metrix 1    
Other Commitments [Line Items]    
Unfunded commitments 37.2  
Investment, Identifier [Axis]: Med-Metrix 2    
Other Commitments [Line Items]    
Unfunded commitments 34.1  
Investment, Identifier [Axis]: Mercer Advisors Inc    
Other Commitments [Line Items]    
Unfunded commitments 4.5  
Investment, Identifier [Axis]: Model N Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 6.1  
Investment, Identifier [Axis]: Model N Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 3.2  
Investment, Identifier [Axis]: NAVEX Global Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 0.3  
Investment, Identifier [Axis]: NAVEX Global Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 6.7  
Investment, Identifier [Axis]: NeoGov Newt Holdco Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 1.1  
Investment, Identifier [Axis]: NeoGov Newt Holdco Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 2.4  
Investment, Identifier [Axis]: NeoGov Newt Holdco Inc 3    
Other Commitments [Line Items]    
Unfunded commitments 4.9  
Investment, Identifier [Axis]: Net Documents    
Other Commitments [Line Items]    
Unfunded commitments 3.6  
Investment, Identifier [Axis]: Netsmart Technologies Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 6.2  
Investment, Identifier [Axis]: Netsmart Technologies Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 6.3  
Investment, Identifier [Axis]: New Era Technology Inc    
Other Commitments [Line Items]    
Unfunded commitments 2.3  
Investment, Identifier [Axis]: Nottingdale Receivables Limited (FKA TalkTalk Telecom Group Ltd), Revolver    
Other Commitments [Line Items]    
Unfunded commitments 14.8  
Investment, Identifier [Axis]: OEConnection LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 0.6  
Investment, Identifier [Axis]: OEConnection LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 2.4  
Investment, Identifier [Axis]: OEConnection LLC 3    
Other Commitments [Line Items]    
Unfunded commitments 6.4  
Investment, Identifier [Axis]: OEConnection LLC 4    
Other Commitments [Line Items]    
Unfunded commitments 6.3  
Investment, Identifier [Axis]: Orion Services Group    
Other Commitments [Line Items]    
Unfunded commitments 4.0  
Investment, Identifier [Axis]: Oxford Global Resources LLC    
Other Commitments [Line Items]    
Unfunded commitments 7.6  
Investment, Identifier [Axis]: PCI Pharma Services 1    
Other Commitments [Line Items]    
Unfunded commitments 25.8  
Investment, Identifier [Axis]: PCI Pharma Services 2    
Other Commitments [Line Items]    
Unfunded commitments 2.0  
Investment, Identifier [Axis]: PCI Pharma Services 3    
Other Commitments [Line Items]    
Unfunded commitments 11.7  
Investment, Identifier [Axis]: PROS Holdings Inc    
Other Commitments [Line Items]    
Unfunded commitments 1.3  
Investment, Identifier [Axis]: PSC Group 1    
Other Commitments [Line Items]    
Unfunded commitments 1.4  
Investment, Identifier [Axis]: PSC Group 2    
Other Commitments [Line Items]    
Unfunded commitments 1.5  
Investment, Identifier [Axis]: PartsSource Inc    
Other Commitments [Line Items]    
Unfunded commitments 0.7  
Investment, Identifier [Axis]: Philippine Airlines 777, Term Loan 1    
Other Commitments [Line Items]    
Unfunded commitments 1.1  
Investment, Identifier [Axis]: Philippine Airlines 777, Term Loan 2    
Other Commitments [Line Items]    
Unfunded commitments 1.1  
Investment, Identifier [Axis]: Pike Corp 1    
Other Commitments [Line Items]    
Unfunded commitments 6.6  
Investment, Identifier [Axis]: Pike Corp 2    
Other Commitments [Line Items]    
Unfunded commitments 4.4  
Investment, Identifier [Axis]: Premise Health Holding Corp 1    
Other Commitments [Line Items]    
Unfunded commitments 0.5  
Investment, Identifier [Axis]: Premise Health Holding Corp 2    
Other Commitments [Line Items]    
Unfunded commitments 2.3  
Investment, Identifier [Axis]: Radwell International LLC    
Other Commitments [Line Items]    
Unfunded commitments 5.8  
Investment, Identifier [Axis]: Railpros Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 0.8  
Investment, Identifier [Axis]: Railpros Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 0.4  
Investment, Identifier [Axis]: Resa Power LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 12.2  
Investment, Identifier [Axis]: Resa Power LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 8.6  
Investment, Identifier [Axis]: Revere Superior Holdings Inc    
Other Commitments [Line Items]    
Unfunded commitments 3.3  
Investment, Identifier [Axis]: Rialto Capital Management LLC    
Other Commitments [Line Items]    
Unfunded commitments 1.0  
Investment, Identifier [Axis]: Rockefeller Capital Management LP    
Other Commitments [Line Items]    
Unfunded commitments 8.8  
Investment, Identifier [Axis]: SAMBA Safety Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 0.6  
Investment, Identifier [Axis]: SAMBA Safety Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 0.9  
Investment, Identifier [Axis]: SCRIPPS SPV LLC (FKA EW Scripps Co/The), Revolver    
Other Commitments [Line Items]    
Unfunded commitments 5.2  
Investment, Identifier [Axis]: STV Group Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 8.3  
Investment, Identifier [Axis]: STV Group Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 11.9  
Investment, Identifier [Axis]: Safe-Guard Products International LLC    
Other Commitments [Line Items]    
Unfunded commitments 8.8  
Investment, Identifier [Axis]: Sallie Mae Levered, Term Loan    
Other Commitments [Line Items]    
Unfunded commitments 0.3  
Investment, Identifier [Axis]: Service Express Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 10.7  
Investment, Identifier [Axis]: Service Express Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 12.3  
Investment, Identifier [Axis]: Service Logic LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 8.0  
Investment, Identifier [Axis]: Service Logic LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 4.0  
Investment, Identifier [Axis]: Sphera Solutions Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 6.4  
Investment, Identifier [Axis]: Sphera Solutions Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 3.4  
Investment, Identifier [Axis]: Sphera Solutions Inc 3    
Other Commitments [Line Items]    
Unfunded commitments 20.0  
Investment, Identifier [Axis]: Spins LLC    
Other Commitments [Line Items]    
Unfunded commitments 3.2  
Investment, Identifier [Axis]: Spotless Brands LLC    
Other Commitments [Line Items]    
Unfunded commitments 5.3  
Investment, Identifier [Axis]: Styron Receivables Funding Designated Activity Company (FKA Trinseo Materials), Revolver    
Other Commitments [Line Items]    
Unfunded commitments 15.0  
Investment, Identifier [Axis]: Sweeping Corp of America LLC    
Other Commitments [Line Items]    
Unfunded commitments 4.5  
Investment, Identifier [Axis]: TPSI Receivables LLC (Tropicana Products Inc), Revolver    
Other Commitments [Line Items]    
Unfunded commitments 6.0  
Investment, Identifier [Axis]: Time Manufacturing Co 1    
Other Commitments [Line Items]    
Unfunded commitments 1.3  
Investment, Identifier [Axis]: Time Manufacturing Co 2    
Other Commitments [Line Items]    
Unfunded commitments 14.0  
Investment, Identifier [Axis]: Trackunit ApS    
Other Commitments [Line Items]    
Unfunded commitments 32.9  
Investment, Identifier [Axis]: Turnpoint Services Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 0.9  
Investment, Identifier [Axis]: Turnpoint Services Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 2.5  
Investment, Identifier [Axis]: USIC Holdings Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 3.0  
Investment, Identifier [Axis]: USIC Holdings Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 8.1  
Investment, Identifier [Axis]: Veriforce LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 2.1  
Investment, Identifier [Axis]: Veriforce LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 3.7  
Investment, Identifier [Axis]: Vermont Information Processing Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 9.6  
Investment, Identifier [Axis]: Vermont Information Processing Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 2.9  
Investment, Identifier [Axis]: Version1 Software Ltd    
Other Commitments [Line Items]    
Unfunded commitments 13.0  
Investment, Identifier [Axis]: VetCor Professional Practices LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 5.9  
Investment, Identifier [Axis]: VetCor Professional Practices LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 20.8  
Investment, Identifier [Axis]: Vitu    
Other Commitments [Line Items]    
Unfunded commitments 9.1  
Investment, Identifier [Axis]: Waste Services Group Pty Ltd    
Other Commitments [Line Items]    
Unfunded commitments 4.8  
Investment, Identifier [Axis]: Wealth Enhancement Group LLC 1    
Other Commitments [Line Items]    
Unfunded commitments 2.8  
Investment, Identifier [Axis]: Wealth Enhancement Group LLC 2    
Other Commitments [Line Items]    
Unfunded commitments 13.9  
Investment, Identifier [Axis]: Wedgewood Weddings 1    
Other Commitments [Line Items]    
Unfunded commitments 5.8  
Investment, Identifier [Axis]: Wedgewood Weddings 2    
Other Commitments [Line Items]    
Unfunded commitments 5.8  
Investment, Identifier [Axis]: West Star Aviation Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 9.5  
Investment, Identifier [Axis]: West Star Aviation Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 30.1  
Investment, Identifier [Axis]: Wood Group Receivables LLC (FKA John Wood Group PLC), Revolver    
Other Commitments [Line Items]    
Unfunded commitments 12.8  
Investment, Identifier [Axis]: Woolpert Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 6.9  
Investment, Identifier [Axis]: Woolpert Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 15.9  
Investment, Identifier [Axis]: Worldwise Inc    
Other Commitments [Line Items]    
Unfunded commitments 0.8  
Investment, Identifier [Axis]: Xylem Kendall 1    
Other Commitments [Line Items]    
Unfunded commitments 15.9  
Investment, Identifier [Axis]: Xylem Kendall 2    
Other Commitments [Line Items]    
Unfunded commitments 1.2  
Investment, Identifier [Axis]: Zellis Holdings Ltd    
Other Commitments [Line Items]    
Unfunded commitments 4.4  
Investment, Identifier [Axis]: Zendesk Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 5.0  
Investment, Identifier [Axis]: Zendesk Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 6.0  
Investment, Identifier [Axis]: Zeus Industrial Products Inc 1    
Other Commitments [Line Items]    
Unfunded commitments 11.6  
Investment, Identifier [Axis]: Zeus Industrial Products Inc 2    
Other Commitments [Line Items]    
Unfunded commitments 7.7  
Investment, Identifier [Axis]: iNova Pharmaceuticals (Australia) Pty Limited    
Other Commitments [Line Items]    
Unfunded commitments $ 2.5