Inventories (Tables)

12 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Summary of Inventories

Inventories consisted of the following:

	As of December 31,
	2017		2016
Parts and work-in-process	$	128.7	$	110.5
Finished goods	114.4		131.8
Total inventories	$	243.1	$	242.3