Interest and Other Income (Expense), Net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Interest and Other Income (Expense), Net
Interest expense, net	$ (3.7)	$ (3.1)
Exchange gains (losses) on foreign currency transactions	(2.3)	(2.3)
Other		(0.2)
Interest and other income (expense), net	$ (6.0)	$ (5.6)