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Inventories (Tables)
6 Months Ended
Jun. 30, 2021
Inventory Disclosure [Abstract]  
Inventories
Inventories consisted of the following:
Millions of dollarsJune 30,
2021
December 31,
2020
Finished products and parts$1,351 $1,330 
Raw materials and supplies924 952 
Work in process80 67 
Total$2,355 $2,349