Segments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
NET SALES OF CONTINUING OPERATIONS:
Total revenues	$ 418.8	$ 383.8	$ 1,270.4	$ 1,111.3
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES:
Total segment operating income	27.0	11.6	66.4	30.8
Gains on sales of assets	0.0	0.0	0.8	2.9
Other components of pension income and other postretirement benefits expense, net	0.6	2.7	1.9	8.3
Interest expense, net	(11.6)	(9.0)	(33.4)	(23.7)
Income from continuing operations before income taxes	16.0	5.3	34.9	15.4
Operating Segments
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES:
Total segment operating income	33.9	19.1	87.2	50.8
Corporate, non-segment
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES:
Corporate costs	(6.9)	(7.5)	(21.6)	(22.9)
Supply Technologies
NET SALES OF CONTINUING OPERATIONS:
Total revenues	192.8	185.9	585.9	530.5
Supply Technologies | Operating Segments
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES:
Total segment operating income	15.6	10.7	45.0	35.4
Assembly Components
NET SALES OF CONTINUING OPERATIONS:
Total revenues	108.4	101.0	330.8	294.3
Assembly Components | Operating Segments
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES:
Total segment operating income	11.2	2.6	26.9	0.7
Engineered Products
NET SALES OF CONTINUING OPERATIONS:
Total revenues	117.6	96.9	353.7	286.5
Engineered Products | Operating Segments
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES:
Total segment operating income	$ 7.1	$ 5.8	$ 15.3	$ 14.7