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Property and Equipment, Net (Tables)
12 Months Ended
Dec. 31, 2012
Property and Equipment, Net

Property and equipment was comprised of the following at December 31, 2012 and 2011:

 

     2012     2011  
     (in millions)  

Land

   $ 20      $ 18   

Buildings and leasehold improvements

     620        523   

Equipment

     728        606   

Computer software

     1,145        935   
  

 

 

   

 

 

 
     2,513        2,082   

Accumulated depreciation

     (1,415     (1,170
  

 

 

   

 

 

 

Property and equipment, net

   $ 1,098      $ 912