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Inventories
12 Months Ended
Dec. 31, 2011
Inventories [Abstract]  
Inventories

6. Inventories

Inventories at Lower of Cost or Market. The table below presents the components of inventories at cost (first-in, first-out or average cost), but not in excess of realizable value.

 

                 
    December 31,  
        2011             2010      
    (in millions)  

Raw materials, components and sub-assemblies

  $     121     $     114  

Work in process

    143       130  

Finished goods

    53       59  
   

 

 

   

 

 

 

Total

  $ 317     $ 303