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Inventories
3 Months Ended
Mar. 31, 2013
Inventory Disclosure [Abstract]  
Inventories
Inventories
 
As of
March 31,
2013
 
As of
December 31,
2012
 
(In $ millions)
Finished goods
560

 
514

Work-in-process
52

 
42

Raw materials and supplies
146

 
155

Total
758

 
711