Investments - Schedule of Loan Exit Fees Receivable (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Exit Fees Receivable	$ 36.4	$ 37.5
Included in Cost [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Exit Fees Receivable	33.0	32.5
Deferred Fees [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Exit Fees Receivable	$ 3.4	$ 5.0