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		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Derivative [Line Items]
Unrealized losses at beginning of period, net of tax	$ (1.3)	$ (16.5)	$ (25.9)	$ (15.0)
Losses reclassified to net sales	0.6	4.0	8.9	10.1
Increase (decrease) in fair value	7.2	(1.7)	23.5	(9.3)
Unrealized gains (losses) at end of period, net of tax	$ 6.5	$ (14.2)	$ 6.5	$ (14.2)