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Pre-Tax Gains Related to Derivatives Not Designated as Hedges (Detail) (Not Designated as Hedging Instrument, Selling, General and Administrative Expenses, Foreign Exchange Contract, USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Not Designated as Hedging Instrument | Selling, General and Administrative Expenses | Foreign Exchange Contract
       
Derivative Instruments Gain Loss [Line Items]        
Total (gain) loss recognized in the consolidated statements of operations $ 7.3 $ 3.1 $ (5.5) $ 2.4