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Inventories, Net (Tables)
9 Months Ended
Sep. 30, 2019
Inventories, Net  
Schedule of inventories

September 30,

December 31,

($ in millions)

    

2019

    

2018

Raw materials and supplies

$

720

$

727

Work-in-process and finished goods

541

614

Less inventory reserves

(81)

(70)

$

1,180

$

1,271