Revenue (Summary of Disaggregation of Revenue by Geographical Area) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	$ 405.9	$ 414.3	$ 432.2	$ 405.7	$ 366.0	$ 352.2	$ 350.9	$ 343.8	$ 1,658.1	$ 1,412.9	$ 1,276.9
Supply Technologies Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									636.8	561.8
Assembly Components Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									578.3	524.5
Engineered Products Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									443.0	326.6
United States
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									1,086.3	923.3
United States | Supply Technologies Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									421.8	382.5
United States | Assembly Components Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									410.2	380.2
United States | Engineered Products Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									254.3	160.6
Europe
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									183.3	143.4
Europe | Supply Technologies Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									98.2	70.3
Europe | Assembly Components Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									7.8	3.4
Europe | Engineered Products Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									77.3	69.7
Asia
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									140.4	126.3
Asia | Supply Technologies Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									49.2	44.0
Asia | Assembly Components Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									30.0	29.9
Asia | Engineered Products Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									61.2	52.4
Mexico
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									103.5	106.0
Mexico | Supply Technologies Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									53.3	52.7
Mexico | Assembly Components Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									34.0	32.7
Mexico | Engineered Products Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									16.2	20.6
Canada
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									130.7	103.8
Canada | Supply Technologies Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									13.3	11.5
Canada | Assembly Components Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									94.9	77.0
Canada | Engineered Products Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									22.5	15.3
Other
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									13.9	10.1
Other | Supply Technologies Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									1.0	0.8
Other | Assembly Components Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									1.4	1.3
Other | Engineered Products Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues									$ 11.5	$ 8.0