Investment In and Advances to Unconsolidated Affiliates - Income Statement of Equity Method Investments (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Net revenues	$ 278.2	$ 337.8	$ 185.1	$ 252.9	$ 280.6	$ 306.3	$ 477.4	$ 265.4	$ 1,054.0	$ 1,329.7	$ 1,009.0
Selling, general and administrative expense									114.8	122.0	90.6
Operating income	$ 22.7	$ 49.5	$ (0.4)	$ (11.6)	$ 3.5	$ 27.8	$ 156.4	$ 28.0	60.2	215.7	188.8
Interest and other expense, net									(80.0)	(70.9)	(40.1)
Net (loss) income									(82.1)	137.2	352.8
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule of Equity Method Investments [Line Items]
Net revenues									386.3	585.5	367.2
Selling, general and administrative expense									252.1	411.4	271.9
Depreciation and amortization									17.0	13.0	22.2
Operating income									117.2	161.1	73.1
Interest and other expense, net									(63.1)	(67.0)	(6.3)
Net (loss) income									$ 54.1	$ 94.1	$ 66.8