Inventories

6 Months Ended

Jun. 30, 2023

Inventory Disclosure [Abstract]

Inventories

7. Inventories

We value our raw materials, work in process, and finished goods inventories using lower of cost, as determined by the average cost method, or net realizable value. Supplies and materials are valued at the first-in, first-out (FIFO) or average cost method.

The components of inventories were as follows (dollars in millions):

	June 30,		December 31,
	2023		2022
Raw materials	$	329.7	$	341.2
Work in process		14.7		16.0
Finished goods		207.2		198.4
Supplies and materials		440.6		421.7
Inventories	$	992.2	$	977.3