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Inventories (Tables)
9 Months Ended
Sep. 30, 2021
Inventory Disclosure [Abstract]  
Inventories
Inventories consisted of:
($ in millions)September 30, 2021December 31, 2020
Finished goods$1,628 $1,610 
Raw materials and work in process6,135 5,949 
Supplies190 146 
Total (approximates current cost)7,953 7,705 
Increase (decrease) to LIFO cost23 (81)
 $7,976 $7,624 
Recognized as:
Inventories$5,603 $5,554 
Other assets2,373 2,070