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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Not Designated as Hedging Instrument | Foreign Exchange Forward Contracts | Selling, General and Administrative Expenses
Derivative Instruments Gain Loss [Line Items]
Total (gain) loss recognized in the consolidated statements of operations	$ 14.2	$ 11.6	$ 8.7	$ 14.0