Basis of Presentation and Nature of Operations - Summary of Impact from the Aerospace and Defense Segment Net Sales (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Change in Accounting Estimate [Line Items]
Favorable (unfavorable) effect of the changes in contract estimates on net income	$ 24.3	$ 5.9	$ 30.2	$ 11.0
Favorable (unfavorable) effect of the changes in contract estimates on basic and diluted net income per share (in USD per share)	$ 0.32	$ 0.09	$ 0.41	$ 0.17
Contracts Accounted for under Percentage-of-Completion
Change in Accounting Estimate [Line Items]
Favorable (unfavorable) effect of the changes in contract estimates on income before income taxes	$ 10.3	$ (3.6)	$ 13.7	$ (3.6)
Favorable (unfavorable) effect of the changes in contract estimates on net income	$ 6.2	$ (2.1)	$ 8.2	$ (2.1)
Favorable (unfavorable) effect of the changes in contract estimates on basic and diluted net income per share (in USD per share)	$ 0.08	$ (0.03)	$ 0.11	$ (0.03)