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Other Current Assets
 6 Months Ended
Jun. 30, 2011
Other Current Assets [Abstract]  
Other Current Assets
 
5.  Other Current Assets
 
Other current assets consisted of:
 
                 
    June 30,
 		    December 31,
 		 
(in $ millions)   2011     2010  
 
Upfront inducement payments and supplier deposits
    73       73  
Sales and use tax receivables
    56       47  
Derivative assets
    38       15  
Prepaid expenses
    16       15  
Assets held for sale
    16       16  
Other
    47       19  
                 
      246       185  
                 
 
Assets held for sale consisted of land and buildings expected to be sold within the next twelve months.