Inventories, net

12 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Inventories, net

Inventories, net

	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

Approximately 66 percent and 68 percent of Inventories, net at December 31, 2017 and 2016, respectively, are valued using the LIFO method. During fiscal 2016, inventory quantities carried on a LIFO basis, primarily in our Performance Chemicals' domestic inventory, were reduced which led to liquidations of LIFO inventory quantities. These reductions resulted in a pre-tax decrease of $3.6 million, recorded to "Cost of sales" on our consolidated statement of operations. No such reductions occurred in fiscal 2017 or 2015.