Unconsolidated Investments - Income From Unconsolidated Investments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Equity Method Investments and Joint Ventures [Abstract]
Income from unconsolidated investments - operating performance	$ 21.4	$ 23.5	$ 35.4	$ 45.1
(Loss) income from unconsolidated investments - fair value	(15.1)	15.9	(12.7)	72.5
(Loss) income from unconsolidated investments - performance allocations	(7.7)	(8.7)	(18.4)	18.5
Total (loss) income from unconsolidated investments	$ (1.4)	$ 30.7	$ 4.3	$ 136.1