Inventories, Net (Tables)

6 Months Ended

Jun. 30, 2016

Inventory Disclosure [Abstract]

Inventories, Net

	December 31, 2015		June 30, 2016
	(In millions)
Raw materials:
Chemicals	$	75.9	$	70.0
Component products		2.8		2.8
Total raw materials		78.7		72.8
Work in process:
Chemicals		21.1		25.9
Component products		9.3		8.8
Total in-process products		30.4		34.7
Finished products:
Chemicals		233.1		183.5
Component products		3.0		2.5
Total finished products		236.1		186.0
Supplies (primarily chemicals)		60.0		61.4
Total	$	405.2	$	354.9