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Inventories (Tables)
6 Months Ended
Jun. 30, 2021
Inventory, Net [Abstract]  
Schedule of Inventory
The following table summarizes our inventories at June 30, 2021 and December 31, 2020:
Millions of dollarsJune 30, 2021December 31, 2020
Finished products$1,915 $1,635 
Raw materials and work in process737 666 
Total Inventories$2,652 $2,301