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INVENTORIES (Tables)
12 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
Schedule of inventories
Inventories consisted of the following:
Balance at December 31, (in millions)
 
2018
 
2017
Raw materials
 
$
74

 
$
66

Materials and supplies
 
445

 
447

Finished goods
 
788

 
776

 
 
1,307

 
1,289

Revaluation to LIFO
 
(47
)
 
(43
)
Total
 
$
1,260

 
$
1,246