Revenue - Schedule of Revenue by Market (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation Of Revenue [Line Items]
Consolidated Net Sales	$ 564.3	$ 572.5	$ 609.0	$ 609.9	$ 561.0	$ 540.5	$ 547.5	$ 540.1	$ 2,355.7	$ 2,189.1	$ 1,973.3
Commercial Aerospace
Disaggregation Of Revenue [Line Items]
Consolidated Net Sales									1,597.7	1,525.0
Space & Defense
Disaggregation Of Revenue [Line Items]
Consolidated Net Sales									444.7	369.9
Industrial
Disaggregation Of Revenue [Line Items]
Consolidated Net Sales									$ 313.3	$ 294.2