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Restructuring Activities (Details 1) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Components of the restructuring accrual, spending and other activity and the accrual balance remaining  
Restructuring accrual at December 31, 2011 $ 24.3
Additional accrual for termination benefits 46.9
Cash payments during 2012 (26.2)
Effect of changes in foreign currency exchange rates 0.4
Restructuring accrual at March 31, 2012 $ 45.4