Revenue - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2017	Mar. 31, 2018	Dec. 31, 2017
Revenue Recognition [Line Items]
Revenue recognition, description of timing		As our production cycle is typically six months or less, it is expected that goods related to the revenue represented in that adjustment will be shipped and billed within the current year.
Contract assets recorded for revenue, unbilled	$ 37.7	$ 37.7		$ 35.2	$ 38.1
Reduction in inventory		$ (28.6)	$ (11.6)
Revenue recognition, description of payment terms		one year or less
Revenue recognition, remaining performance obligation, expected timing of satisfaction	1 year	1 year
Accounting Standards Update No. 2014-09
Revenue Recognition [Line Items]
Contract assets recorded for revenue, unbilled					$ 38.1
Offset recorded to opening balance of retained earnings, taxes		$ 1.3
Contract assets billed and reclassified to trade accounts receivable	$ 35.0
Increase in revenue	2.8
Increase in gross margin	$ 0.6
Increase in diluted earnings per share	$ 0.005
Reduction in inventory	$ 32.8
Accounting Standards Update No. 2014-09 | Retained Earnings
Revenue Recognition [Line Items]
Reduction in inventory associated with revenue recorded to retained earnings	$ 33.0	$ 33.0