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Inventories (Tables)
 6 Months Ended
Jun. 30, 2019
Inventory Disclosure [Abstract]  
Schedule of Inventories
Inventories consisted of:
($ in millions)
June 30, 2019
 
December 31, 2018
Finished goods
$
1,750

 
$
1,658

Raw materials and work in process
5,388

 
5,004

Supplies
202

 
194

Total (approximates current cost)
7,340

 
6,856

(Decrease) increase to LIFO costs
(29
)
 
1

 
$
7,311

 
$
6,857

Recognized as:
 
 
 
Inventories
$
5,847

 
$
5,440

Other assets
1,464

 
1,417