Derivative Financial Instruments and Risk Management - Location and Amount of Gain (Loss) on Foreign Currency Derivatives (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Recognized in Income on Derivatives	$ (2.0)	$ 0.6	$ (3.0)	$ 0.8
Remeasurement of assets and liabilities in foreign currencies	1.4	(0.6)	1.5	(0.9)
Net loss on foreign currency transactions	(0.6)	0.0	(1.5)	(0.1)
Revenue
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Recognized in Income on Derivatives	(1.8)	(0.2)	(3.5)	(0.1)
Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Recognized in Income on Derivatives	(0.4)	0.8	0.2	0.7
Other expense (income), net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Recognized in Income on Derivatives	$ 0.2	$ 0.0	$ 0.3	$ 0.2