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Inventories (Tables)
6 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Inventories
Inventories consisted of the following:
Millions of dollarsJune 30,
2020
December 31,
2019
Finished products and parts$1,514  $1,865  
Raw materials and supplies1,154  1,147  
Work in process77  127  
Total$2,745  $3,139