Income Taxes - Losses Before Income Taxes and Non-Controlling Interests (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Examination [Line Items]
Total	$ (53.2)	$ (260.4)	$ (231.8)
Domestic
Income Tax Examination [Line Items]
Total	(214.7)	(362.3)	(260.3)
Foreign
Income Tax Examination [Line Items]
Total	$ 161.5	$ 101.9	$ 28.5