Derivatives - Schedule of Pre-Tax Gains Related to Derivatives Not Designated as Hedges (Detail) (Not Designated as Hedging Instrument, Foreign Exchange Forward Contracts, Selling, general and administrative expenses, USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
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 Condensed Consolidated Statements of Operations	$ (19.8)	$ 14.2	$ (21.3)	$ 8.7