Inventories (Tables)

6 Months Ended

Jun. 30, 2016

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories at June 30, 2016 and December 31, 2015 were as follows (in millions):

	June 30, 2016			December 31, 2015
Raw materials and supplies	$	194.4		$	216.0
Work-in-process	851.6			990.3
Finished goods	164.7			184.1
Total inventories at current cost	1,210.7			1,390.4
Adjustment from current cost to LIFO cost basis	131.8			136.4
Inventory valuation reserves	(204.1		)	(206.3		)
Progress payments	(44.1		)	(48.9		)
Total inventories, net	$	1,094.3		$	1,271.6

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,
	2016			2015
LIFO benefit (charge)	$	(4.6	)	$	4.5
NRV benefit (charge)	5.0			(4.3		)
Net cost of sales impact	$	0.4		$	0.2