Segments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
NET SALES OF CONTINUING OPERATIONS:
Total revenues	$ 428.1	$ 369.8	$ 851.6	$ 727.5
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES:
Total segment operating income	19.2	13.8	39.4	19.2
Gains on sales of assets	0.0	2.9	0.8	2.9
Other components of pension income and other postretirement benefits expense, net	0.6	2.8	1.3	5.6
Interest expense, net	(11.1)	(7.6)	(21.8)	(14.7)
Income from continuing operations before income taxes	8.7	9.0	18.9	10.1
Operating Segments
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES:
Total segment operating income	27.0	18.4	53.3	31.7
Corporate, non-segment
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES:
Corporate costs	(7.8)	(7.5)	(14.7)	(15.4)
Supply Technologies
NET SALES OF CONTINUING OPERATIONS:
Total revenues	197.3	175.8	393.1	344.6
Supply Technologies | Operating Segments
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES:
Total segment operating income	15.4	12.7	29.4	24.7
Assembly Components
NET SALES OF CONTINUING OPERATIONS:
Total revenues	112.0	95.4	222.4	193.3
Assembly Components | Operating Segments
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES:
Total segment operating income	8.4	(1.4)	15.7	(1.9)
Engineered Products
NET SALES OF CONTINUING OPERATIONS:
Total revenues	118.8	98.6	236.1	189.6
Engineered Products | Operating Segments
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES:
Total segment operating income	$ 3.2	$ 7.1	$ 8.2	$ 8.9