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Other Non-Current Assets (Tables)
 12 Months Ended
Dec. 31, 2012
Other Non-Current Assets [Abstract]  
Other non-current assets
                 
(in $ millions)   December 31,
2012		     December 31,
2011		  

Development advances

     87       100  

Deferred financing costs

     74       98  

Supplier prepayments

     33       14  

Derivative assets

     5       —  

Pension assets

     4       7  

Other

     15       18  
   

 

 

    

 

 

  
      218       237