Hedging Transaction and Derivative Instruments - Fair Value of Derivative Instruments, Balance Sheet Location (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Foreign Exchange Contract | Cash Flow Hedging | Designated as hedging instrument | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value
Derivative Asset	$ 0.3	$ 0.2
Foreign Exchange Contract | Cash Flow Hedging | Designated as hedging instrument | Other accrued expenses
Derivatives, Fair Value
Derivative liability	0.0	(0.6)
Foreign Currency Economic Hedge | Not Designated as Hedging Instrument, Economic Hedge | Not designated as hedging instrument | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value
Derivative Asset	0.0	0.2
Foreign Currency Economic Hedge | Not Designated as Hedging Instrument, Economic Hedge | Not designated as hedging instrument | Other accrued expenses
Derivatives, Fair Value
Derivative liability	$ (0.1)	$ 0.0