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Inventories (Tables)
9 Months Ended
Sep. 30, 2018
Inventory Disclosure [Abstract]  
Inventories
Inventories consisted of:
($ in millions)
September 30, 2018
 
December 31, 2017
Finished goods
$
1,585

 
$
1,334

Raw materials and work in process
4,933

 
4,703

Supplies
202

 
201

Total (approximates current cost)
6,720

 
6,238

(Decrease) increase to LIFO costs
(10
)
 
45

 
$
6,710

 
$
6,283

Recognized as:
 
 
 
Inventories
$
5,416

 
$
5,096

Other assets
1,294

 
1,187