Accounts Payable and Accrued Expenses (Details) - Consolidated Entity Excluding Consolidated Funds - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Accounts Payable And Accrued Expenses [Line Items]
Accounts payable	$ 6.7	$ 8.6
Accrued expenses	25.6	24.9
Accrued interest payable	5.6	5.6
Total accounts payable and accrued expenses	$ 37.9	$ 39.1