Inventories (Tables)

12 Months Ended

Dec. 31, 2017

Inventories

Schedule of inventories

        Inventories consisted of the following at December 31, (in millions):

	2017		2016
Raw materials	$	152.0	$	132.8
Work-in-process		183.1		181.0
Finished goods		96.6		91.8
Demonstration units		54.5		34.8
Inventories	$	486.2	$	440.4