Revenue Recognition - Schedule of Impact of the Change in Contract Estimates on Operating Results (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Change in Accounting Estimate [Line Items]
Net favorable effect of the changes in contract estimates on net sales	$ 512.4	$ 485.0	$ 988.5	$ 976.7
Net favorable effect of the changes in contract estimates on income before income taxes	53.5	59.4	96.2	111.2
Net favorable effect of the changes in contract estimates on net income	$ 39.2	$ 44.1	$ 70.6	$ 82.8
Net favorable effect of the changes in contract estimates on basic EPS (USD per share)	$ 0.50	$ 0.56	$ 0.90	$ 1.05
Net favorable effect of the changes in contract estimates on diluted EPS (USD per share)	$ 0.47	$ 0.54	$ 0.84	$ 1.01
Aerospace and Defense | Contracts Accounted for under Percentage-of-Completion
Change in Accounting Estimate [Line Items]
Net favorable effect of the changes in contract estimates on net sales	$ 15.1	$ 25.8	$ 17.2	$ 38.8
Net favorable effect of the changes in contract estimates on income before income taxes	15.7	25.6	18.2	39.0
Net favorable effect of the changes in contract estimates on net income	$ 11.4	$ 19.0	$ 13.3	$ 28.7
Net favorable effect of the changes in contract estimates on basic EPS (USD per share)	$ 0.15	$ 0.24	$ 0.17	$ 0.37
Net favorable effect of the changes in contract estimates on diluted EPS (USD per share)	$ 0.14	$ 0.23	$ 0.16	$ 0.35