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Investments - Schedule of Unamortized Capitalized Fee Income (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Unamortized Fee Income | $ 42.3 | $ 54.0
Offset against debt investment cost |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Unamortized Fee Income | 32.9 | 43.1
Deferred obligation contingent on funding or other milestone |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Unamortized Fee Income | $ 9.4 | $ 10.9

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- Details
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- Details
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