Revenue (Summary of Disaggregation of Revenue by Product Line) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	$ 228.3	$ 415.3	$ 594.6	$ 835.4
Supply Technologies Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	94.4	161.5	235.2	326.8
Assembly Components Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	54.9	136.3	183.1	274.6
Engineered Products Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	79.0	117.5	176.3	234.0
Supply Technologies | Supply Technologies Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	86.0	141.0	207.9	285.8
Engineered specialty fasteners and other products | Supply Technologies Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	8.4	20.5	27.3	41.0
Fuel, rubber and plastic products | Assembly Components Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	39.8	91.1	124.5	180.7
Aluminum products | Assembly Components Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	15.1	45.2	58.6	93.9
Industrial equipment | Engineered Products Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	53.4	80.7	119.5	161.3
Forged and machined products | Engineered Products Segment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues	$ 25.6	$ 36.8	$ 56.8	$ 72.7