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INVENTORIES (Tables)
 12 Months Ended
Dec. 31, 2019
Inventory Disclosure [Abstract]  
Schedule of inventories Inventories consisted of the following at December 31:
millions
 
2019

 
2018

Raw materials
 
$
75

 
$
74

Materials and supplies
 
879

 
445

Commodity inventory and finished goods
 
533

 
788

 
 
1,487

 
1,307

Revaluation to LIFO
 
(40
)
 
(47
)
Total
 
$
1,447

 
$
1,260