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Property and Equipment, Net
9 Months Ended
Sep. 30, 2011
Property and Equipment, Net [Abstract] 
Property and Equipment, Net
6.  Property and Equipment, Net
 
Property and equipment, net, consisted of:
 
                                                 
    September 30, 2011     December 31, 2010  
          Accumulated
                Accumulated
       
(in $ millions)   Cost     depreciation     Net     Cost     depreciation     Net  
 
Capitalized software
    600       (289 )     311       573       (256 )     317  
Furniture, fixtures and equipment
    231       (138 )     93       215       (125 )     90  
Building and leasehold improvements
    15       (9 )     6       15       (9 )     6  
Construction in progress
    31             31       71             71  
                                                 
      877       (436 )     441       874       (390 )     484  
                                                 
 
The Company recorded depreciation expense of $34 million and $32 million during the three months ended September 30, 2011 and 2010, respectively. The Company recorded depreciation expense of $101 million and $88 million during the nine months ended September 30, 2011 and 2010, respectively.
 
As of September 30, 2011 and December 31, 2010, the Company had capital lease assets of $56 million and $47 million, respectively, included within furniture, fixtures and equipment. For the nine months ended September 30, 2011 and 2010, the Company invested $66 million and $181 million, respectively, in property and equipment. Construction in progress as of September 30, 2011 and December 31, 2010 includes $1 million and $6 million, respectively, of capitalized interest.