Segments (Schedule of Segment Information) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net sales:
Net sales	$ 312.7		$ 364.4	$ 970.1	$ 1,116.4
Segment operating income:
Total segment operating income	20.9		27.4	52.5	77.3
Asset impairment charge	0.0	$ (4.0)	0.0	(4.0)	0.0
Interest expense	(7.2)		(7.0)	(21.3)	(20.7)
Income before income taxes	13.7		20.4	31.2	56.6
Operating Segments
Net sales:
Net sales	312.7		364.4	970.1	1,116.4
Segment operating income:
Total segment operating income	27.6		35.0	77.7	97.8
Operating Segments | Supply Technologies
Net sales:
Net sales	122.0		143.1	384.8	444.7
Segment operating income:
Total segment operating income	9.7		13.0	30.8	40.2
Operating Segments | Assembly Components
Net sales:
Net sales	133.4		149.3	399.4	429.6
Segment operating income:
Total segment operating income	13.9		17.7	38.3	41.9
Operating Segments | Engineered Products
Net sales:
Net sales	57.3		72.0	185.9	242.1
Segment operating income:
Total segment operating income	4.0		4.3	8.6	15.7
Segment Reconciling Items
Segment operating income:
Corporate costs	(6.7)		(7.6)	(21.2)	(20.5)
Asset impairment charge	0.0		0.0	(4.0)	0.0
Interest expense	$ (7.2)		$ (7.0)	$ (21.3)	$ (20.7)