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Other Intangible Assets - Schedule of Amortization Expense (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Finite-Lived Intangible Assets [Line Items]    
Amortization expense $ (4.4) $ (2.1)
Product Rights [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Amortization expense (1.0) 0
Brand Names [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Amortization expense (0.1) 0
Technology [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Amortization expense (0.6) (0.5)
Customer Relationships [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Amortization expense (1.3) (0.9)
Patents [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Amortization expense (0.1) (0.1)
Internally Developed Software [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Amortization expense (0.9) 0
Non-Compete Agreements [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Amortization expense (0.2) (0.2)
Marketing Related [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Amortization expense $ (0.2) $ (0.4)