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Inventories
6 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Inventories Inventories
Inventories consisted of the following (in millions):
June 30, 2020December 31, 2019
Raw materials$463  $358  
Work in process2,376  2,227  
Finished goods1,001  999  
Total inventories$3,840  $3,584