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Plant and Equipment, Net (Tables)
6 Months Ended
Jun. 30, 2011
Plant and Equipment Net [Abstract]  
Plant and equipment
                 
    June 30,     December 31,  
    2011     2010  
    (In millions)  
Land
  $ 3     $ 3  
Buildings
    89       89  
Equipment
    582       573  
 
           
Total
    674       665  
Accumulated depreciation
    (424 )     (422 )
 
           
Plant and equipment, net
  $ 250     $ 243