Investments - Schedule of Unamortized Capitalized Fee Income (Details) - USD ($) $ in Millions  | 
6 Months Ended | 12 Months Ended | 
|---|---|---|
Jun. 30, 2023  | 
Dec. 31, 2022  | 
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| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Total Unamortized Fee Income | $ 56.1 | $ 54.0 | 
| Included in Cost [Member] | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Total Unamortized Fee Income | 43.9 | 43.1 | 
| Deferred Fees [Member] | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Total Unamortized Fee Income | $ 12.2 | $ 10.9 | 
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- Definition Unamortized Fee Income No definition available. 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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