Operating Segments and Related Disclosures - Schedule of Selected Financial Information for Each Reportable Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Net Sales:
Net sales	$ 566.3	$ 511.1
Reconciliation of segment performance to income before income taxes:
Segment performance	33.3	42.7
Interest expense	(5.7)	(3.9)
Stock-based compensation	(4.5)	0.9
Income before income taxes	33.8	38.3
Operating Segments
Net Sales:
Net sales	566.3	511.1
Reconciliation of segment performance to income before income taxes:
Segment performance	60.8	55.1
Operating Segments | Aerospace and Defense
Net Sales:
Net sales	565.7	510.5
Segment Performance:
Aerospace and Defense	55.7	62.7
Environmental remediation provision adjustments	(0.3)	(0.4)
GAAP/Cost Accounting Standards retirement benefits expense difference	9.5	9.2
Unusual items	(3.8)	(16.3)
Reconciliation of segment performance to income before income taxes:
Segment performance	61.1	55.2
Corporate retirement benefits	9.5	9.2
Unusual items	(3.8)	(16.3)
Operating Segments | Real Estate
Net Sales:
Net sales	0.6	0.6
Reconciliation of segment performance to income before income taxes:
Segment performance	(0.3)	(0.1)
Segment Reconciling Items
Segment Performance:
Unusual items	(16.2)	(5.4)
Reconciliation of segment performance to income before income taxes:
Segment performance	60.8	55.1
Interest expense	(5.7)	(3.9)
Interest income and other	3.8	(0.2)
Stock-based compensation	(4.5)	0.9
Unusual items	(16.2)	(5.4)
Corporate, Non-Segment
Segment Performance:
GAAP/Cost Accounting Standards retirement benefits expense difference	0.8	0.0
Reconciliation of segment performance to income before income taxes:
Corporate retirement benefits	0.8	0.0
Corporate and other	$ (5.2)	$ (8.2)