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Inventories
6 Months Ended
Jun. 30, 2022
Inventory Disclosure [Abstract]  
Inventories Inventories
 
Inventories (principally using the last-in, first-out (LIFO) method) were comprised of the following:
 
(Millions of dollars)June 30,
2022
December 31,
2021
Raw materials$6,129 $5,528 
Work-in-process1,604 1,318 
Finished goods7,850 6,907 
Supplies298 285 
Total inventories$15,881 $14,038