Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Net Sales	$ 949.2	$ 1,196.4	$ 2,039.5	$ 2,283.7
Electrical
Disaggregation of Revenue [Line Items]
Net Sales	507.1	688.2	1,113.2	1,318.4
Electrical | United States
Disaggregation of Revenue [Line Items]
Net Sales	461.9	620.4	1,011.6	1,186.1
Electrical | International
Disaggregation of Revenue [Line Items]
Net Sales	45.2	67.8	101.6	132.3
Electrical | Commercial and Industrial
Disaggregation of Revenue [Line Items]
Net Sales	167.7	234.3	380.7	455.6
Electrical | Construction and Energy
Disaggregation of Revenue [Line Items]
Net Sales	159.7	207.3	351.1	395.6
Electrical | Lighting
Disaggregation of Revenue [Line Items]
Net Sales	179.7	246.6	381.4	467.2
Utility Solutions
Disaggregation of Revenue [Line Items]
Net Sales	442.1	508.2	926.3	965.3
Utility Solutions | United States
Disaggregation of Revenue [Line Items]
Net Sales	418.8	477.8	874.3	909.0
Utility Solutions | International
Disaggregation of Revenue [Line Items]
Net Sales	23.3	30.4	52.0	56.3
Utility Solutions | Power Systems
Disaggregation of Revenue [Line Items]
Net Sales	312.9	334.1	639.2	626.1
Utility Solutions | Aclara
Disaggregation of Revenue [Line Items]
Net Sales	$ 129.2	$ 174.1	$ 287.1	$ 339.2