Revenue (Summary of Disaggregation of Revenue by Product Line) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	$ 340.2	$ 403.4	$ 934.8	$ 1,238.8
Supply Technologies Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	132.0	148.6	367.2	475.4
Assembly Components Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	126.9	135.9	310.0	410.5
Engineered Products Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	81.3	118.9	257.6	352.9
Supply Technologies | Supply Technologies Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	112.1	128.2	320.1	413.9
Engineered specialty fasteners and other products | Supply Technologies Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	19.9	20.4	47.1	61.5
Fuel, rubber and plastic products | Assembly Components Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	86.8	91.1	211.3	271.8
Aluminum products | Assembly Components Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	40.1	44.8	98.7	138.7
Industrial equipment | Engineered Products Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	56.2	81.4	175.7	242.8
Forged and machined products | Engineered Products Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	$ 25.1	$ 37.5	$ 81.9	$ 110.1