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Business Combinations (Separately Recognized Transactions) (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2016
Jan. 01, 2016
Business Acquisition [Line Items]    
Goodwill $ 2,111.1 $ 2,106.4
Series of Individually Immaterial Business Acquisitions [Member]    
Business Acquisition [Line Items]    
Fair value of total purchase consideration 13.6  
Net tangible liabilities assumed (1.9)  
Identifiable intangible assets 6.5  
Goodwill $ 9.0