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Other Current Assets
 12 Months Ended
Dec. 31, 2011
Other Current Assets [Abstract]  
Other Current Assets

7.     Other Current Assets

Other current assets consisted of:

 

                 
(in $ millions)   December 31,

2011

     December 31,

2010

  
                 

Development advances

     63       73  

Sales and use tax receivables

     49       47  

Assets held for sale

     16       16  

Prepaid expenses

     15       15  

Derivative assets

     2       15  

Other

     23       19  
   

 

 

    

 

 

  
      168       185  
   

 

 

    

 

 

  

Assets held for sale consisted of land and buildings expected to be sold within the next twelve months.