Segments (Schedule of Segment Information) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Jun. 17, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net sales:
Total revenues		$ 403.4	$ 414.3	$ 1,238.8	$ 1,252.2
Segment operating income:
Total segment operating income		23.8	24.8	65.6	74.1
One-time net expense related to former President		0.0	0.0	(4.3)	0.0
Gain on sale of assets		0.0	0.0	0.0	1.9
Other components of pension income and other postretirement benefits expense, net		1.4	2.0	4.2	6.4
Interest expense, net		(8.6)	(8.9)	(25.5)	(26.1)
Income before income taxes		16.6	17.9	44.3	54.4
Supply Technologies
Net sales:
Total revenues		148.6	155.1	475.4	482.2
Assembly Components
Net sales:
Total revenues		135.9	146.1	410.5	444.7
Engineered Products
Net sales:
Total revenues		118.9	113.1	352.9	325.3
Operating Segments
Net sales:
Total revenues		403.4	414.3	1,238.8	1,252.2
Segment operating income:
Total segment operating income		30.7	32.8	91.3	98.3
Operating Segments | Supply Technologies
Net sales:
Total revenues		148.6	155.1	475.4	482.2
Segment operating income:
Total segment operating income		10.0	11.3	34.4	37.3
Operating Segments | Assembly Components
Net sales:
Total revenues		135.9	146.1	410.5	444.7
Segment operating income:
Total segment operating income		10.4	9.3	27.0	33.6
Operating Segments | Engineered Products
Net sales:
Total revenues		118.9	113.1	352.9	325.3
Segment operating income:
Total segment operating income		10.3	12.2	29.9	27.4
Segment Reconciling Items
Segment operating income:
Total segment operating income		23.8	24.8	65.6	74.1
Corporate costs		(6.9)	(8.0)	(21.4)	(26.1)
Gain on sale of assets		0.0	0.0	0.0	1.9
Other components of pension income and other postretirement benefits expense, net		1.4	2.0	4.2	6.4
Interest expense, net		$ (8.6)	$ (8.9)	$ (25.5)	$ (26.1)
President
Segment operating income:
One-time net expense related to former President	$ (4.3)
Payment	6.0
Reversal related to forfeitures	$ 1.7