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Inventories (Tables)
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Schedule of inventories
Inventories (stated at the lower of cost or market, cost being determined on a FIFO basis) as of December 31, 2020 and 2019 consist of the following:
20202019
(in millions)
Raw materials$1,525 $1,332 
Work-in-process622 612 
Finished goods3,875 5,138 
Total Inventories$6,022 $7,082