Revenue (Summary of Disaggregation of Revenue by Geographical Area) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	$ 405.7	$ 343.8
Supply Technologies Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	160.9	133.1
Assembly Components Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	145.4	139.4
Engineered Products Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	99.4	71.3
United States
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	258.6	228.2
United States | Supply Technologies Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	103.3	91.0
United States | Assembly Components Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	101.8	103.6
United States | Engineered Products Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	53.5	33.6
Europe
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	46.0	33.5
Europe | Supply Technologies Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	26.0	14.8
Europe | Assembly Components Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	1.2	1.0
Europe | Engineered Products Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	18.8	17.7
Asia
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	33.4	27.8
Asia | Supply Technologies Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	13.9	10.6
Asia | Assembly Components Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	7.8	7.3
Asia | Engineered Products Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	11.7	9.9
Mexico
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	30.7	24.2
Mexico | Supply Technologies Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	14.2	13.1
Mexico | Assembly Components Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	8.5	7.7
Mexico | Engineered Products Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	8.0	3.4
Canada
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	34.3	27.7
Canada | Supply Technologies Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	3.4	3.1
Canada | Assembly Components Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	25.7	19.4
Canada | Engineered Products Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	5.2	5.2
Other
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	2.7	2.4
Other | Supply Technologies Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	0.1	0.5
Other | Assembly Components Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	0.4	0.4
Other | Engineered Products Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	$ 2.2	$ 1.5