Inventories

9 Months Ended

Sep. 30, 2022

Inventory Disclosure [Abstract]

Inventories

Inventories

($ in millions)	September 30, 2022	December 31, 2021
Finished products	$1,293	$1,175
Work in process	255	234
Raw materials	824	723
Supplies	39	39
Total Inventories	$2,411	$2,171

Most U.S. inventories are valued using the last-in, first-out method. These inventories represented approximately 34% and 29% of total inventories at September 30, 2022 and December 31, 2021, respectively. If the first-in, first-out ("FIFO") method of inventory valuation had been used, inventories would have been $260 million and $174 million higher as of September 30, 2022 and December 31, 2021, respectively.