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Employee Benefit Plans (Details 1)
Dec. 31, 2011
Dec. 31, 2010
United States plan [Member]
   
Assumption rates used for benefit obligations    
Discount rate: 4.58% 4.95%
International plans [Member]
   
Assumption rates used for benefit obligations    
Discount rate minimum: 4.50% 5.25%
Discount rate maximum: 5.60% 5.50%
Salary increase minimum: 2.50% 2.50%
Salary increase maximum: 4.00% 4.33%