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Other Intangible Assets - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Jun. 30, 2013
Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]        
Intangible asset capitalized $ 178.6 $ 175.5 $ 110.0 $ 106.2
Internally Developed Software [Member]
       
Finite-Lived Intangible Assets [Line Items]        
Intangible asset capitalized $ 22.5   $ 13.9