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Inventory, Net (Tables)
3 Months Ended
Mar. 31, 2021
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
(dollars in millions)March 31, 2021December 31, 2020
Raw materials$2,995 $3,015 
Work-in-process3,240 2,924 
Finished goods3,263 3,472 
Total inventory, net$9,498 $9,411