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Summary of Other (Income) Expense, Net (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Other Income And Expenses [Abstract]      
Other expense $ 59.9 $ 33.9 $ 27.8
Other income (1.8) (27.5) (3.6)
Other expense, net $ 58.1 $ 6.4 $ 24.2