Inventories (Tables)

3 Months Ended

Mar. 31, 2019

Inventory Disclosure [Abstract]

Components of Inventories

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

	March 31,		December 31,
	2019		2018
Raw materials	$	330.1	$	307.8
Work in process		13.6		13.9
Finished goods		210.5		199.0
Supplies and materials		277.5		274.9
Inventories	$	831.7	$	795.6