Investment in and Advances to Unconsolidated Affiliates - Affiliate Income Statement (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Investments in and Advances to Affiliates [Line Items]
Net revenue	$ 324.3	$ 252.9
Net income (loss)	36.1	(23.5)
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Investments in and Advances to Affiliates [Line Items]
Net revenue	138.7	137.8
Operating and SG&A expense	85.6	100.8
Depreciation and amortization	4.3	4.2
Total operating expense	89.9	105.0
Operating income	48.8	32.8
Interest and other, net	(4.6)	(35.8)
Net income (loss)	$ 44.2	$ (3.0)