Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 1,100.1	$ 1,083.4	$ 1,054.3	$ 956.3	$ 917.1	$ 970.3	$ 837.5	$ 957.6	$ 4,194.1	$ 3,682.5	$ 3,946.6
United States
Disaggregation of Revenue [Line Items]
Net sales									3,809.8	3,356.9	3,546.1
International
Disaggregation of Revenue [Line Items]
Net sales									384.3	325.6	400.5
Electrical Solutions
Disaggregation of Revenue [Line Items]
Net sales									1,859.7	1,603.1	1,776.6
Electrical Solutions | United States
Disaggregation of Revenue [Line Items]
Net sales									1,604.9	1,389.0	1,509.1
Electrical Solutions | International
Disaggregation of Revenue [Line Items]
Net sales									254.8	214.1	267.5
Electrical Solutions | Commercial and Industrial
Disaggregation of Revenue [Line Items]
Net sales									1,150.1	918.7	1,013.1
Electrical Solutions | Heavy Industrial
Disaggregation of Revenue [Line Items]
Net sales									337.5	302.0	382.9
Electrical Solutions | Residential and Retail
Disaggregation of Revenue [Line Items]
Net sales									372.1	382.4	380.6
Utility Solutions
Disaggregation of Revenue [Line Items]
Net sales									2,334.4	2,079.4	2,170.0
Utility Solutions | United States
Disaggregation of Revenue [Line Items]
Net sales									2,204.9	1,967.9	2,037.0
Utility Solutions | International
Disaggregation of Revenue [Line Items]
Net sales									129.5	111.5	133.0
Utility Solutions | Utility T&D Components
Disaggregation of Revenue [Line Items]
Net sales									1,679.8	1,445.1	1,434.2
Utility Solutions | Utility Communications and Controls
Disaggregation of Revenue [Line Items]
Net sales									$ 654.6	$ 634.3	$ 735.8