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Goodwill and Intangible Assets, Net - Estimated Future Amortization Expense for Finite-lived Intangible Assets (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]    
2014 $ 21.5  
2015 21.3  
2016 21.2  
2017 21.0  
2018 19.9  
Thereafter 140.1  
Total $ 245.0 $ 68.8