Revenue Recognition - Schedule of Impact of the Change in Contract Estimates on Operating Results (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Change in Accounting Estimate [Line Items]
Net favorable effect of the changes in contract estimates on net sales	$ 545.3	$ 527.7	$ 1,598.3	$ 1,516.2
Net favorable effect of the changes in contract estimates on net income	$ 42.6	$ 31.7	$ 105.7	$ 102.3
Net favorable effect of the changes in contract estimates on basic EPS (USD per share)	$ 0.53	$ 0.40	$ 1.33	$ 1.30
Net favorable effect of the changes in contract estimates on diluted EPS (USD per share)	$ 0.52	$ 0.38	$ 1.29	$ 1.23
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	$ 11.4	$ 3.2	$ 35.2	$ 20.4
Net favorable effect of the changes in contract estimates on income before income taxes	10.8	3.2	32.4	21.4
Net favorable effect of the changes in contract estimates on net income	$ 8.0	$ 2.7	$ 24.1	$ 16.0
Net favorable effect of the changes in contract estimates on basic EPS (USD per share)	$ 0.10	$ 0.03	$ 0.30	$ 0.20
Net favorable effect of the changes in contract estimates on diluted EPS (USD per share)	$ 0.10	$ 0.03	$ 0.29	$ 0.19