Revenue (Summary of Disaggregation of Revenue by Product Line) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total	$ 358.5	$ 340.2	$ 1,068.1	$ 934.8
Supply Technologies Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total	154.0	132.0	466.7	367.2
Assembly Components
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total	120.2	126.9	355.7	310.0
Engineered Products
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total	84.3	81.3	245.7	257.6
Supply Technologies | Supply Technologies Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total	134.5	112.1	406.2	320.1
Engineered specialty fasteners and other products | Supply Technologies Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total	19.5	19.9	60.5	47.1
Fuel, rubber and plastic products | Assembly Components
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total	80.8	86.8	238.2	211.3
Aluminum products | Assembly Components
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total	39.4	40.1	117.5	98.7
Industrial equipment | Engineered Products
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total	62.0	56.2	179.9	175.7
Forged and machined products | Engineered Products
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total	$ 22.3	$ 25.1	$ 65.8	$ 81.9