Inventories (Tables)

9 Months Ended

Sep. 30, 2018

Inventory Disclosure [Abstract]

Inventories

	Balance at
Inventories (in millions):	September 30, 2018			December 31, 2017
Raw materials and supplies	$	204.4		$	200.2
Work in process	128.4			157.9
Finished goods	54.1			54.1
	386.9			412.2
Progress payments	—			(1.4		)
Reduction to LIFO cost basis	(9.3		)	(10.6		)
Total inventories, net	$	377.6		$	400.2