Inventories, Net (Tables)

6 Months Ended

Jun. 30, 2020

Inventory Disclosure [Abstract]

Inventories, Net

	December 31,		June 30,
	2019		2020
	(In millions)
Raw materials:
Chemicals	$	124.4	$	104.0
Component products		2.9		3.4
Total raw materials		127.3		107.4
Work in process:
Chemicals		39.0		49.8
Component products		11.8		13.6
Total in-process products		50.8		63.4
Finished products:
Chemicals		270.7		276.0
Component products		3.6		4.8
Total finished products		274.3		280.8
Supplies (chemicals)		69.7		69.4
Total	$	522.1	$	521.0