Inventories



($ in millions)	June 30, 2017		December 31, 2016
Finished products	$	1,114	$	947
Work in process	186		165
Raw materials	433		370
Supplies	33		32
Total Inventories	$	1,766	$	1,514

Most U.S. inventories are valued using the last-in, first-out method. These inventories represented approximately 35% and 38% of total inventories at June 30, 2017 and December 31, 2016, respectively. If the first-in, first-out method of inventory valuation had been used, inventories would have been $102 million and $106 million higher as of June 30, 2017 and December 31, 2016, respectively.