Inventories

3 Months Ended

Mar. 31, 2022

Inventory Disclosure [Abstract]

Inventories

. 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 methods.

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

	March 31,		December 31,
	2022		2021
Raw materials	$	354.1	$	324.2
Work in process		16.7		16.2
Finished goods		201.1		201.0
Supplies and materials		369.3		361.1
Inventories	$	941.2	$	902.5