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Inventories (Tables)
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Inventories
Inventories at December 31 consisted of:
20202019
Finished goods$1,963 $1,772 
Raw materials and work in process6,420 5,650 
Supplies206 207 
Total (approximates current cost)8,589 7,629 
Decrease to LIFO cost(82)(171)
 $8,507 $7,458 
Recognized as:
Inventories$6,310 $5,978 
Other assets2,197 1,480