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Income Tax (Details 3)
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Reconciliation of the US statutory federal tax rate to the consolidated effective income tax rate        
US statutory federal tax rate 35.00% 35.00% 35.00% 35.00%
US state income taxes (1.00%)      
Non-US income taxed at different rates (10.00%) (14.00%) (11.00%) (14.00%)
Charges       2.00%
Other 1.00% (3.00%)   (2.00%)
Effective income tax rate 25.00% 18.00% 24.00% 21.00%