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Other (Expense), Net - Details of Other (Expense), Net (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Other Income And Expenses [Abstract]        
Interest and dividend income $ 3.0 $ 2.4 $ 6.6 $ 5.6
Net foreign exchange transaction losses (2.6) (3.8) (4.6) (5.4)
Bank fee expense (1.7) (1.7) (3.3) (3.3)
Other, net (3.5) (0.2) (3.1) 0.1
Other (Expense), net $ (4.8) $ (3.3) $ (4.4) $ (3.0)