Acquisitions (Details) - USD ($) shares in Millions, $ in Millions			1 Months Ended		12 Months Ended
	Aug. 01, 2022	Mar. 21, 2022	Aug. 31, 2022	Mar. 31, 2022	Dec. 31, 2022
Management Contracts
Asset Acquisition [Line Items]
Purchase price		$ 812.9
Payments to acquire productive assets		618.4
Business acquisition costs		$ 3.4
Newly issued common shares (in shares)		4.2	0.6	4.2
Shares of common stock		$ 194.5
Asset acquisition, CLO senior and subordinated notes		$ 175.9
Amortization period		7 years
Management Contracts | Contractual Rights
Asset Acquisition [Line Items]
Assets acquired, contractual rights		$ 794.3
Abingworth
Asset Acquisition [Line Items]
Equity interest acquired	100.00%
Total consideration transferred	$ 2,000.0
Purchase price in cash	$ 161.2
Issuance of common stock (in shares)	0.6
Shares of common stock	$ 25.0
Earnout payable	$ 130.0
Business acquisition costs					$ 7.7