Quarterly report [Sections 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
Mar. 31, 2025
Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Unamortized Fee Income $ 47.4 $ 46.0
Offset against debt investment cost    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Unamortized Fee Income 37.2 36.9
Deferred obligation contingent on funding or other milestone    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Unamortized Fee Income $ 10.2 $ 9.1