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Business Acquisition (Tables)
6 Months Ended
Jun. 30, 2013
Business Acquisitions [Abstract]  
ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock
 Tangible assets acquired$ 29.7 
 Intangible assets  17.0 
 Goodwill  44.8 
 Liabilities assumed  (9.8) 
  Total cash consideration$ 81.7