Unconsolidated Investments - Schedule of (Loss) Income from Unconsolidated Investments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Equity Method Investments and Joint Ventures [Abstract]
Income from unconsolidated investments - operating performance	$ 4.5	$ 19.9	$ 39.9	$ 65.0
Income from unconsolidated investments - realized gains	0.0	4.6	0.0	4.6
(Loss) income from unconsolidated investments - fair value	(60.6)	5.8	(73.3)	78.3
(Loss) income from unconsolidated investments - performance allocations	(17.9)	(18.0)	(36.3)	0.5
Total (loss) income from unconsolidated investments	$ (74.0)	$ 12.3	$ (69.7)	$ 148.4