Investment in and Advances to Unconsolidated Affiliates - Affiliate Income Statement (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Investments in and Advances to Affiliates [Line Items]
Net revenue	$ 515.1		$ 185.1		$ 839.4	$ 438.0
Net income (loss)	108.3	$ 36.1	(118.8)	$ (23.5)	144.4	(142.3)
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Investments in and Advances to Affiliates [Line Items]
Net revenue	197.9		6.8		336.6	144.6
Operating and SG&A expense	109.8		7.2		195.4	108.0
Depreciation and amortization	4.4		4.1		8.7	8.3
Total operating expense	114.2		11.3		204.1	116.3
Operating income (loss)	83.7		(4.5)		132.5	28.3
Interest and other, net	(19.7)		(13.4)		(24.3)	(49.2)
Net income (loss)	$ 64.0		$ (17.9)		$ 108.2	$ (20.9)