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Postretirement Benefits (Details Textual) (USD $)
In Millions, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
U.S. Benefit Plan [Member]
   
Postretirement Benefits (Textual) [Abstract]    
Contribution to defined benefit plan $ 3.2 $ 0
Required contribution to defined benefit plan 11.2  
Non-U.S. Benefit Plan [Member]
   
Postretirement Benefits (Textual) [Abstract]    
Contribution to defined benefit plan 1.2 0.6
Required contribution to defined benefit plan $ 1.6