Segments (Schedule of Segment Information) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net sales:
Total revenues	$ 366.3	$ 420.1
Segment operating income:
Total segment operating income	13.0	22.5
Other components of pension income and other postretirement benefits expense, net	1.8	1.3
Interest expense, net	(8.0)	(8.2)
Income before income taxes	6.8	15.6
Supply Technologies
Net sales:
Total revenues	140.8	165.3
Assembly Components
Net sales:
Total revenues	128.2	138.3
Engineered Products
Net sales:
Total revenues	97.3	116.5
Operating Segments
Net sales:
Total revenues	366.3	420.1
Segment operating income:
Total segment operating income	19.3	29.5
Operating Segments | Supply Technologies
Net sales:
Total revenues	140.8	165.3
Segment operating income:
Total segment operating income	9.2	13.1
Operating Segments | Assembly Components
Net sales:
Total revenues	128.2	138.3
Segment operating income:
Total segment operating income	6.3	8.3
Operating Segments | Engineered Products
Net sales:
Total revenues	97.3	116.5
Segment operating income:
Total segment operating income	3.8	8.1
Segment Reconciling Items
Segment operating income:
Total segment operating income	13.0	22.5
Corporate costs	(6.3)	(7.0)
Other components of pension income and other postretirement benefits expense, net	1.8	1.3
Interest expense, net	$ (8.0)	$ (8.2)