Inventories (Tables)

6 Months Ended

Jun. 30, 2019

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories at June 30, 2019 and December 31, 2018 were as follows (in millions):

	June 30, 2019			December 31, 2018
Raw materials and supplies	$	194.1		$	191.5
Work-in-process	917.8			914.1
Finished goods	182.7			191.1
Total inventories at current cost	1,294.6			1,296.7
Adjustment from current cost to LIFO cost basis	13.9			2.9
Inventory valuation reserves	(91.0		)	(88.5		)
Total inventories, net	$	1,217.5		$	1,211.1

Schedule of Inventory Valuation Impact on Income

Impacts to cost of sales for changes in the LIFO costing methodology and associated NRV inventory reserves were as follows (in millions):

	Six months ended June 30,
	2019			2018
LIFO benefit (charge)	$	5.8		$	(27.5	)
NRV benefit (charge)	(5.9		)	27.5
Net cost of sales impact	$	(0.1	)	$	—