Inventories, net (Tables)

12 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Schedule of Inventory

	December 31,
In millions	2017			2016
Raw materials	$	40.1		$	50.8
Production materials, stores and supplies	13.4			12.0
Finished and in-process goods	114.3			109.8
Subtotal	167.8			172.6
Less: excess of cost over LIFO cost	(7.8		)	(21.4		)
Inventories, net	$	160.0		$	151.2