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Inventory, Net (Tables)
12 Months Ended
Dec. 31, 2019
Inventory Disclosure [Abstract]  
Inventory Table [Table Text Block]
(dollars in millions)20192018
Raw materials$3,357  $3,052  
Work-in-process2,726  2,673  
Finished goods4,867  4,358  
$10,950  $10,083