Derivative Financial Instruments - Schedule of Change in Fair Value of Foreign Currency Forward Exchange Contracts Under Hedge Designations (Details) - Designated as Hedging Instrument - Foreign Currency Forward Exchange Contracts - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Derivative [Line Items]
Unrealized losses at beginning of period, net of tax	$ (18.3)	$ (5.7)	$ (25.9)	$ (15.0)
Losses reclassified to net sales	3.3	1.7	8.3	6.1
Increase (decrease) in fair value	13.7	(12.5)	16.3	(7.6)
Unrealized losses at end of period, net of tax	$ (1.3)	$ (16.5)	$ (1.3)	$ (16.5)