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Other Noncurrent Liabilities - Components of Other Noncurrent Liabilities (Detail) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Other Liabilities Noncurrent [Abstract]    
Reserve for uncertain tax positions $ 13.8 $ 16.5
Employee benefits 11.9 12.2
Other 5.8 5.8
Total $ 31.5 $ 34.5