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Inventories (Tables)
6 Months Ended
Jun. 30, 2019
Inventory Disclosure [Abstract]  
Schedule of inventories Inventories as of June 30, 2019, and December 31, 2018, consisted of the following (in millions):
 
 
2019
 
2018
 
 
 
 
 
 
 
Raw materials
 
$
68

 
$
74

 
Materials and supplies
 
531

 
445

 
Finished goods
 
1,030

 
788

 
 
 
1,629

 
1,307

 
Revaluation to LIFO
 
(47
)
 
(47
)
 
Total
 
$
1,582

 
$
1,260