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Other Noncurrent Liabilities - Other Noncurrent Liabilities (Detail) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Other Liabilities Disclosure [Abstract]    
Reserve for uncertain tax positions $ 35.8 $ 49.8
Asset retirement obligations 26.6 25.6
Employee benefits 11.9 12.2
Insurance claims and expenses 9.8 9.5
Deferred payment obligation 8.4 8.2
Deferred income 1.0 1.3
Other 3.5 3.6
Total $ 97.0 $ 110.2