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Consolidated Statements of Income (Parenthetical) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Intangible Assets (Excluding Goodwill) [Line Items]    
Impairment of unamortized intangible assets $ 166.0  
Impairment charges 166.0 0
Acquired Intellectual Property Rights
   
Intangible Assets (Excluding Goodwill) [Line Items]    
Impairment of unamortized intangible assets   0
Amortization of intangible assets $ 57.8 $ 36.1