Interest and Other Income (Expense), Net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Interest and Other Income (Expense), Net
Interest expense, net	$ (3.1)	$ (3.4)
Exchange (losses) gains on foreign currency transactions	0.1	0.5
Other	(0.5)	0.6
Interest and other income (expense), net	$ (3.5)	$ (2.3)