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Plant and Equipment, Net (Tables)
12 Months Ended
Dec. 31, 2011
Plant and Equipment, Net [Abstract]  
Plant and equipment
                 
    December 31,  
    2011     2010  
    (In millions)  

Land

  $ 3     $ 3  

Buildings

    90       89  

Equipment

    597       573  
   

 

 

   

 

 

 

Total

    690       665  

Accumulated depreciation

    (428 )      (422 ) 
   

 

 

   

 

 

 

Plant and equipment, net

  $ 262     $ 243