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Inventories
 3 Months Ended
Mar. 31, 2018
Inventories  
Inventories

8.     Inventories

 

 

 

 

 

 

 

 

 

 

March 31,

 

December 31,

($ in millions)

    

2018

    

2017

 

 

 

 

 

 

 

Raw materials and supplies

 

$

719

 

$

691

Work-in-process and finished goods

 

 

794

 

 

902

Less inventory reserves

 

 

(66)

 

 

(67)

 

 

$

1,447

 

$

1,526