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Inventories (Tables)
9 Months Ended
Sep. 30, 2022
Inventory Disclosure [Abstract]  
Inventories
Inventories (principally using the last-in, first-out (LIFO) method) were comprised of the following:
 
(Millions of dollars)September 30,
2022
December 31,
2021
Raw materials$6,335 $5,528 
Work-in-process1,836 1,318 
Finished goods8,387 6,907 
Supplies302 285 
Total inventories$16,860 $14,038