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Inventories (Tables)
 12 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
Inventories
Inventories at December 31 consisted of:
 
2018
 
2017
Finished goods
$
1,658

 
$
1,334

Raw materials and work in process
5,004

 
4,703

Supplies
194

 
201

Total (approximates current cost)
6,856

 
6,238

Increase to LIFO costs
1

 
45

 
$
6,857

 
$
6,283

Recognized as:
 
 
 
Inventories
$
5,440

 
$
5,096

Other assets
1,417

 
1,187