Quarterly report pursuant to Section 13 or 15(d)

Investments - Schedule of Unamortized Capitalized Fee Income (Details)

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Investments - Schedule of Unamortized Capitalized Fee Income (Details) - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended
Sep. 30, 2023
Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Unamortized Fee Income $ 56.7 $ 54.0
Included in Cost    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Unamortized Fee Income 44.6 43.1
Deferred Fees    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Unamortized Fee Income $ 12.1 $ 10.9