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Consolidated Statements of Income (Parenthetical) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Intangible Assets (Excluding Goodwill) [Line Items]      
Impairment of unamortized intangible assets $ 19.9 $ 71.2 $ 16.0
Impairment charges 19.9 197.9 16.0
Acquired Intellectual Property Rights
     
Intangible Assets (Excluding Goodwill) [Line Items]      
Amortization and impairment charges of intangible assets $ 152.0 $ 280.3 $ 145.0