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Property And Equipment Net (Tables)
6 Months Ended
Jun. 30, 2012
Property and Equipment, Net [Abstract]  
Summary of Property and equipment
                                                 
    June 30, 2012     December 31, 2011  
(in $ millions)   Cost     Accumulated
depreciation
    Net     Cost     Accumulated
depreciation
    Net  
             

Capitalized software

    586       (330 )      256       600       (314 )      286  

Furniture, fixtures and equipment

    241       (146 )      95       240       (137 )      103  

Building and leasehold improvements

    11       (7 )      4       11       (7 )      4  

Construction in progress

    40       —       40       38       —       38  
   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

 
      878       (483 )      395       889       (458 )      431