Segments (Schedule of Segment Information) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net sales:
Net sales	$ 306.8	$ 312.7	$ 329.4	$ 328.0	$ 347.4	$ 364.4	$ 377.3	$ 374.7	$ 1,276.9	$ 1,463.8	$ 1,378.7
Segment operating income:
Total segment operating income									69.2	97.9	97.9
Asset impairment charge				$ (4.0)					(4.0)	0.0	0.0
Litigation judgment costs									0.0	(2.2)	0.0
Interest expense									(28.2)	(27.9)	(26.1)
Income before income taxes									41.0	70.0	71.8
Capital expenditures:									28.5	36.5	23.7
Depreciation and amortization expense:									29.5	28.7	23.2
Identifiable assets:	974.3				942.1				974.3	942.1	969.1
Operating Segments
Segment operating income:
Total segment operating income									101.1	129.1	127.2
Segment Reconciling Items
Segment operating income:
Corporate costs									(27.9)	(29.0)	(29.3)
Corporate
Segment operating income:
Capital expenditures:									0.0	0.0	1.5
Depreciation and amortization expense:									0.6	1.2	1.2
Identifiable assets:	74.5				77.9				74.5	77.9	104.1
Supply Technologies
Segment operating income:
Capital expenditures:									6.1	3.7	5.8
Depreciation and amortization expense:									4.7	4.7	4.5
Identifiable assets:	262.0				276.3				262.0	276.3	277.6
Supply Technologies | Operating Segments
Net sales:
Net sales									502.1	578.7	559.6
Segment operating income:
Total segment operating income									40.0	50.3	42.5
Assembly Components
Segment operating income:
Capital expenditures:									16.9	27.3	14.0
Depreciation and amortization expense:									20.1	18.6	14.2
Identifiable assets:	332.9				344.8				332.9	344.8	340.5
Assembly Components | Operating Segments
Net sales:
Net sales									529.4	569.2	490.5
Segment operating income:
Total segment operating income									50.5	57.9	42.0
Engineered Products
Segment operating income:
Capital expenditures:									5.5	5.5	2.4
Depreciation and amortization expense:									4.1	4.2	3.3
Identifiable assets:	$ 304.9				$ 243.1				304.9	243.1	246.9
Engineered Products | Operating Segments
Net sales:
Net sales									245.4	315.9	328.6
Segment operating income:
Total segment operating income									$ 10.6	$ 20.9	$ 42.7