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Inventories (Tables)
12 Months Ended
Dec. 31, 2019
Inventory Disclosure [Abstract]  
Schedule of Inventory Components Inventories
December 31,
2019
 
2018
Finished goods
$
671

 
$
668

Work-in-process
1,316

 
1,371

Purchased raw materials
343

 
366

Operating supplies
99

 
87

Total inventories
$
2,429

 
$
2,492