Investment in and Advances to Unconsolidated Affiliates - Affiliate Income Statement (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Affiliate Income Statement [Abstract]
Net revenue	$ 137.8	$ 89.5
Operating and SG&A expense	100.8	61.0
Depreciation and amortization	4.2	2.2
Total operating expense	105.0	63.2
Operating income	32.8	26.3
Interest and other, net	(35.8)	(17.0)
Net (loss) income	$ (3.0)	$ 9.3