Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Net Sales	$ 1,090.3	$ 1,087.3
Electrical
Disaggregation of Revenue [Line Items]
Net Sales	606.1	630.2
Electrical | United States
Disaggregation of Revenue [Line Items]
Net Sales	549.7	565.7
Electrical | International
Disaggregation of Revenue [Line Items]
Net Sales	56.4	64.5
Electrical | Commercial and Industrial
Disaggregation of Revenue [Line Items]
Net Sales	213.0	221.3
Electrical | Construction and Energy
Disaggregation of Revenue [Line Items]
Net Sales	191.4	188.4
Electrical | Lighting
Disaggregation of Revenue [Line Items]
Net Sales	201.7	220.5
Utility Solutions
Disaggregation of Revenue [Line Items]
Net Sales	484.2	457.1
Utility Solutions | United States
Disaggregation of Revenue [Line Items]
Net Sales	455.5	431.2
Utility Solutions | International
Disaggregation of Revenue [Line Items]
Net Sales	28.7	25.9
Utility Solutions | Power Systems
Disaggregation of Revenue [Line Items]
Net Sales	326.3	291.9
Utility Solutions | Aclara
Disaggregation of Revenue [Line Items]
Net Sales	$ 157.9	$ 165.2