Derivatives - Schedule of Pre-Tax (Gains) Losses Related to Derivatives Not Designated as Hedges (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Not Designated as Hedging Instrument | Foreign Exchange Forward Contracts | Selling, General and Administrative Expenses
Derivative Instruments Gain Loss [Line Items]
Classification of (Gain) Loss Recognized in the Consolidated Statements of Operations	$ (5.7)	$ (28.2)	$ (33.3)