Inventories, Net (Tables)

9 Months Ended

Sep. 30, 2015

Inventory Disclosure [Abstract]

Inventories, Net

	December 31, 2014		September 30, 2015
	(In millions)
Raw materials:
Chemicals	$	76.0	$	86.9
Component products		3.4		3.3
Total raw materials		79.4		90.2
Work in process:
Chemicals		32.9		25.2
Component products		10.3		9.9
Total in-process products		43.2		35.1
Finished products:
Chemicals		253.2		215.0
Component products		3.2		2.3
Total finished products		256.4		217.3
Supplies (primarily chemicals)		64.0		61.1
Total	$	443.0	$	403.7