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Consolidated Statements of Income (Parenthetical) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Intangible Assets (Excluding Goodwill) [Line Items]        
Impairment of unamortized intangible assets $ 22.0 $ 19.9 $ 188.0 $ 19.9
Impairment charges     188.0 19.9
Acquired Intellectual Property Rights
       
Intangible Assets (Excluding Goodwill) [Line Items]        
Amortization of intangible assets $ 61.2 $ 35.9 $ 119.0 $ 72.0