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Inventories
9 Months Ended
Sep. 30, 2018
Inventory Disclosure [Abstract]  
Inventories
Inventories
 
As of
September 30,
2018
 
As of
December 31,
2017
 
(In $ millions)
Finished goods
673

 
591

Work-in-process
63

 
57

Raw materials and supplies
297

 
252

Total
1,033

 
900