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Losses 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
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Not Designated as Hedging Instrument | Selling, General and Administrative Expenses | Foreign Exchange Contract
     
Derivative Instruments, Gain (Loss) [Line Items]      
Total loss recognized in the consolidated statements of operations $ 24.8 $ 4.7 $ 2.5