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Inventories
 12 Months Ended
Dec. 31, 2016
Inventories  
Inventories

7.  Inventories

 

 

 

 

 

 

 

 

 

 

December 31,

($ in millions)

    

2016

    

2015

 

 

 

 

 

 

 

Raw materials and supplies

 

$
607

 

$
438

Work-in-process and finished goods

 

 
839

 

 
504

Less inventory reserves

 

 
(33)

 

 
(44)

 

 

$
1,413

 

$
898