v3.20.2
Inventories
6 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Inventories Inventories
June 30, 2020December 31, 2019
Finished goods$279  $237  
Work-in-process540  738  
Purchased raw materials70  85  
Operating supplies71  69  
960  1,129  
LIFO reserve(282) (309) 
$678  $820  
At June 30, 2020 and December 31, 2019, the portion of Inventories subject to the last-in, first-out (LIFO) inventory accounting method was $636, or 66%, and $753, or 67%, respectively, of total inventories before LIFO adjustments.