Goodwill (Change in Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Roll Forward]
Goodwill, beginning of period	$ 100.2	$ 86.6
Acquisitions	5.0	9.9
Foreign currency translation	(1.8)	3.7
Goodwill, end of period	103.4	100.2
Supply Technologies
Goodwill [Roll Forward]
Goodwill, beginning of period	15.4	6.1
Acquisitions	(0.5)	8.4
Foreign currency translation	(0.7)	0.9
Goodwill, end of period	14.2	15.4
Assembly Components
Goodwill [Roll Forward]
Goodwill, beginning of period	54.1	54.1
Acquisitions	1.9	0.0
Foreign currency translation	0.0	0.0
Goodwill, end of period	56.0	54.1
Engineered Products
Goodwill [Roll Forward]
Goodwill, beginning of period	30.7	26.4
Acquisitions	3.6	1.5
Foreign currency translation	(1.1)	2.8
Goodwill, end of period	$ 33.2	$ 30.7