Investment In and Advances to Unconsolidated Affiliates - Income Statement of Equity Method Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Equity Method Investments and Joint Ventures [Abstract]
Net revenue	$ 367.2	$ 443.7	$ 347.4
Operating and SG&A expense	271.9	345.3	274.1
Depreciation and amortization	22.2	25.9	18.5
Operating income	73.1	72.5	54.8
Interest and other expense, net	(6.3)	(8.5)	(6.9)
Net income	$ 66.8	$ 64.0	$ 47.9