Inventories (Tables)

3 Months Ended

Mar. 31, 2020

Inventory Disclosure [Abstract]

Components of Inventories

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

	March 31,		December 31,
	2020		2019
Raw materials	$	269.6	$	271.5
Work in process		12.9		11.0
Finished goods		220.2		207.7
Supplies and materials		307.2		303.9
Inventories	$	809.9	$	794.1