Segments (Schedule of Segment Information) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net sales:
Net sales	$ 329.4	$ 377.3	$ 657.4	$ 752.0
Segment operating income:
Total segment operating income	20.3	25.6	31.6	49.9
Asset impairment	0.0	0.0	(4.0)	0.0
Interest expense	(7.0)	(6.9)	(14.1)	(13.7)
Income before income taxes	13.3	18.7	17.5	36.2
Operating Segments
Net sales:
Net sales	329.4	377.3	657.4	752.0
Segment operating income:
Total segment operating income	28.3	31.8	50.1	62.8
Operating Segments | Supply Technologies
Net sales:
Net sales	132.9	150.2	262.8	301.6
Segment operating income:
Total segment operating income	10.9	13.0	21.1	27.2
Operating Segments | Assembly Components
Net sales:
Net sales	134.3	139.8	266.0	280.3
Segment operating income:
Total segment operating income	14.2	13.6	24.4	24.2
Operating Segments | Engineered Products
Net sales:
Net sales	62.2	87.3	128.6	170.1
Segment operating income:
Total segment operating income	3.2	5.2	4.6	11.4
Segment Reconciling Items
Segment operating income:
Corporate costs	(8.0)	(6.2)	(14.5)	(12.9)
Interest expense	$ (7.0)	$ (6.9)	$ (14.1)	$ (13.7)