Inventories, Net (Tables)

9 Months Ended

Sep. 30, 2018

Inventory Disclosure [Abstract]

Schedule of Inventories, Net

	December31,		September30,
	2017		2018
	(In millions)
Raw materials	$	106.9	$	106.1
Work in process		20.8		26.6
Finished products		191.5		248.8
Supplies		63.1		64.7
Total	$	382.3	$	446.2