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Inventory (Tables)
12 Months Ended
Dec. 31, 2019
Inventory  
Inventory

($ in millions)

    

    

    

    

At December 31:

2019

2018

Finished goods

$

220

$

266

Work in process and raw materials

 

1,399

 

1,415

Total

$

1,619

$

1,682