Segments (Schedule of Segment Information) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net sales:
Total	$ 358.5	$ 340.2	$ 1,068.1	$ 934.8
Segment operating income (loss):
Total segment operating income	(5.0)	11.0	3.9	3.1
Other components of pension income and other postretirement benefits expense, net	2.4	1.9	7.3	5.5
Interest expense, net	(7.6)	(7.4)	(22.4)	(22.9)
(Loss) income before income taxes	(10.2)	5.5	(11.2)	(14.3)
Operating Segments
Segment operating income (loss):
Total segment operating income	2.4	18.6	23.3	22.8
Segment Reconciling Items
Segment operating income (loss):
Corporate costs	(7.4)	(7.6)	(19.4)	(19.7)
Supply Technologies
Net sales:
Total	154.0	132.0	466.7	367.2
Supply Technologies | Operating Segments
Segment operating income (loss):
Total segment operating income	10.7	10.6	33.2	20.1
Assembly Components
Net sales:
Total	120.2	126.9	355.7	310.0
Assembly Components | Operating Segments
Segment operating income (loss):
Total segment operating income	(8.9)	6.7	(8.6)	(1.6)
Engineered Products
Net sales:
Total	84.3	81.3	245.7	257.6
Engineered Products | Operating Segments
Segment operating income (loss):
Total segment operating income	$ 0.6	$ 1.3	$ (1.3)	$ 4.3