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Inventories (Tables)
9 Months Ended
Sep. 30, 2020
Inventory Disclosure [Abstract]  
Inventories
Inventories consisted of the following:
Millions of dollarsSeptember 30,
2020
December 31,
2019
Finished products and parts$1,452 $1,865 
Raw materials and supplies1,061 1,147 
Work in process67 127 
Total$2,580 $3,139