XML 22 R10.htm IDEA: XBRL DOCUMENT v3.24.1.u1
Inventories
3 Months Ended
Mar. 31, 2024
Inventory Disclosure [Abstract]  
Inventories Inventories
($ in millions)March 31, 2024December 31, 2023
Finished products$1,337 $1,197 
Work in process254 236 
Raw materials684 640 
Supplies56 54 
Total Inventories$2,331 $2,127 
Most U.S. inventories are valued using the last-in, first-out method. These inventories represented approximately 16% and 20% of total inventories at March 31, 2024 and December 31, 2023, respectively. If the first-in, first-out ("FIFO") method of inventory valuation had been used, inventories would have been $252 million and $249 million higher as of March 31, 2024 and December 31, 2023, respectively.