Industry Segments and Geographic Area Information - Industry Segments Information (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
Net Sales:
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
Operating Income:
Operating Income									532.3	494.5	526.7
Gain (Loss) on disposition of business									(6.9)	0.0	21.7
Loss on extinguishment of debt									(16.8)	0.0	0.0
Pension charge									0.0	(7.6)	0.0
Interest expense, net									(54.7)	(60.1)	(68.6)
Investment income									0.0	0.0	1.5
Other Income (expense), net									5.4	(2.3)	(12.1)
Income from continuing operations before income taxes									459.3	424.5	469.2
Assets:
Assets	5,281.5				5,085.1				5,281.5	5,085.1	4,903.0
Capital Expenditures:
Capital expenditures									90.2	82.8	86.7
Depreciation and Amortization:
Depreciation and amortization									149.1	144.5	137.9
Electrical Solutions
Net Sales:
Net sales									1,859.7	1,603.1	1,776.6
Utility Solutions
Net Sales:
Net sales									2,334.4	2,079.4	2,170.0
Operating Segments | Electrical Solutions
Net Sales:
Net sales									1,859.7	1,603.1	1,776.8
Operating Income:
Operating Income									248.2	188.9	236.2
Assets:
Assets	2,142.1				1,984.4				2,142.1	1,984.4	1,934.2
Capital Expenditures:
Capital expenditures									31.1	25.0	27.7
Depreciation and Amortization:
Depreciation and amortization									40.6	41.3	42.4
Operating Segments | Utility Solutions
Net Sales:
Net sales									2,334.4	2,079.4	2,169.8
Operating Income:
Operating Income									284.1	305.6	290.5
Assets:
Assets	2,823.8				2,812.4				2,823.8	2,812.4	2,664.9
Capital Expenditures:
Capital expenditures									55.8	55.9	52.6
Depreciation and Amortization:
Depreciation and amortization									108.5	103.2	95.5
General Corporate
Assets:
Assets	$ 315.6				$ 288.3				315.6	288.3	303.9
Capital Expenditures:
Capital expenditures									$ 3.3	$ 1.9	$ 6.4