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Goodwill and Other Intangibles Resulting from Business Acquisitions (Details 2) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2012
Future amortization expense for finite lived intangible assets  
Remainder of 2012 $ 14.8
2013 28.2
2014 24.5
2015 21.0
2016 $ 19.4