Investments - Summary of Transactions with Affiliates (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Related Party Transaction [Line Items]
Amounts due from affiliates	$ 149.8	$ 121.6
Related Party
Related Party Transaction [Line Items]
Amounts due from affiliates	13.8	7.4
Amounts due to affiliates	6.3	6.8
Related Party | BRI
Related Party Transaction [Line Items]
Amounts due from affiliates	4.5	0.0
Amounts due to affiliates	0.0	1.6
Related Party | BDL
Related Party Transaction [Line Items]
Amounts due from affiliates	1.9	3.2
Amounts due to affiliates	0.0	0.0
Related Party | Other
Related Party Transaction [Line Items]
Amounts due from affiliates	7.4	4.2
Amounts due to affiliates	$ 6.3	$ 5.2