Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Net Sales	$ 1,213.6	$ 1,108.6	$ 3,483.8	$ 3,148.1
Electrical Solutions
Disaggregation of Revenue [Line Items]
Net Sales	611.9	551.0	1,761.0	1,584.1
Electrical Solutions | United States
Disaggregation of Revenue [Line Items]
Net Sales	549.7	495.7	1,571.7	1,427.2
Electrical Solutions | International
Disaggregation of Revenue [Line Items]
Net Sales	62.2	55.3	189.3	156.9
Electrical Solutions | Commercial and Industrial
Disaggregation of Revenue [Line Items]
Net Sales	434.9	372.9	1,237.0	1,066.4
Electrical Solutions | Heavy Industrial
Disaggregation of Revenue [Line Items]
Net Sales	85.2	75.1	247.3	228.6
Electrical Solutions | Residential and Retail
Disaggregation of Revenue [Line Items]
Net Sales	91.8	103.0	276.7	289.1
Utility Solutions
Disaggregation of Revenue [Line Items]
Net Sales	601.7	557.6	1,722.8	1,564.0
Utility Solutions | United States
Disaggregation of Revenue [Line Items]
Net Sales	571.4	524.9	1,633.1	1,479.3
Utility Solutions | International
Disaggregation of Revenue [Line Items]
Net Sales	30.3	32.7	89.7	84.7
Utility Solutions | Utility T&D Components
Disaggregation of Revenue [Line Items]
Net Sales	435.3	396.9	1,231.5	1,089.3
Utility Solutions | Utility Communications and Controls
Disaggregation of Revenue [Line Items]
Net Sales	$ 166.4	$ 160.7	$ 491.3	$ 474.7