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Inventories
9 Months Ended
Sep. 30, 2023
Inventory Disclosure [Abstract]  
Inventories Inventories
 
Inventories (principally using the last-in, first-out (LIFO) method) were comprised of the following:
 
(Millions of dollars)September 30,
2023
December 31,
2022
Raw materials$6,798 $6,370 
Work-in-process1,650 1,452 
Finished goods8,788 8,138 
Supplies344 310 
Total inventories$17,580 $16,270