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Inventories (Tables)
 3 Months Ended
Mar. 31, 2020
Inventory Disclosure [Abstract]  
Schedule of Inventories
Inventories consisted of:
($ in millions)
March 31, 2020
 
December 31, 2019
Finished goods
$
1,753

 
$
1,772

Raw materials and work in process
5,629

 
5,650

Supplies
232

 
207

Total (approximates current cost)
7,614

 
7,629

Decrease to LIFO cost
(138
)
 
(171
)
 
$
7,476

 
$
7,458

Recognized as:
 
 
 
Inventories
$
5,846

 
$
5,978

Other assets
1,630

 
1,480