Inventories, Net (Tables)

3 Months Ended

Mar. 31, 2015

Inventory Disclosure [Abstract]

Inventories, Net

	December 31, 2014		March 31, 2015
	(In millions)
Raw materials:
Chemicals	$	76.0	$	76.7
Component products		3.4		3.3
Total raw materials		79.4		80.0
Work in process:
Chemicals		32.9		33.0
Component products		10.3		10.7
Total in-process products		43.2		43.7
Finished products:
Chemicals		253.2		228.9
Component products		3.2		2.8
Total finished products		256.4		231.7
Supplies (primarily chemicals)		64.0		58.4
Total	$	443.0	$	413.8