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Business Acquisitions (Details) - USD ($)
$ in Millions
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Business Acquisition [Line Items]      
Goodwill $ 920.2   $ 874.7
Series of Individually Immaterial Business Acquisitions      
Business Acquisition [Line Items]      
Tangible assets acquired   $ 34.4  
Intangible assets   61.3  
Goodwill   40.7  
Other liabilities assumed   (9.6)  
TOTAL CASH CONSIDERATION, NET   $ 126.8