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Inventories
 3 Months Ended
Mar. 31, 2017
Inventories  
Inventories

7.     Inventories

 

 

 

 

 

 

 

 

 

 

March 31,

 

December 31,

($ in millions)

    

2017

    

2016

 

 

 

 

 

 

 

Raw materials and supplies

 

$

653

 

$

607

Work-in-process and finished goods

 

 

930

 

 

839

Less inventory reserves

 

 

(29)

 

 

(33)

 

 

$

1,554

 

$

1,413