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Inventories (Tables)
9 Months Ended
Sep. 30, 2021
Inventory, Net [Abstract]  
Schedule of Inventory
The following table summarizes our inventories at September 30, 2021 and December 31, 2020:
Millions of dollarsSeptember 30, 2021December 31, 2020
Finished products$2,134 $1,635 
Raw materials and work in process742 666 
Total Inventories$2,876 $2,301