Consolidated Statement of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Net sales	$ 4,194.1	$ 3,682.5	$ 3,946.6
Cost of goods sold	3,042.6	2,596.7	2,775.0
Gross profit	1,151.5	1,085.8	1,171.6
Selling & administrative expenses	619.2	591.3	644.9
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)
Total other expense	(73.0)	(70.0)	(57.5)
Income from continuing operations before income taxes	459.3	424.5	469.2
Provision for income taxes	88.2	89.8	101.2
Net income from continuing operations	371.1	334.7	368.0
Less: Net income from continuing operations attributable to noncontrolling interest	(6.1)	(4.7)	(6.5)
Net income from continuing operations attributable to Hubbell Incorporated	365.0	330.0	361.5
Income from discontinued operations, net of tax	34.5	21.2	39.4
Net income attributable to Hubbell Incorporated	$ 399.5	$ 351.2	$ 400.9
Earnings per share
Basic earnings per share from continuing operations (USD per share)	$ 6.70	$ 6.07	$ 6.63
Basic earnings per share from discontinued operations (USD per share)	0.63	0.39	0.72
Basic earnings per share (USD per share)	7.33	6.46	7.35
Diluted earnings per share from continuing operations (USD per share)	6.66	6.04	6.59
Diluted earnings per share from discontinued operations (USD per share)	0.62	0.39	0.72
Diluted earnings per share (USD per share)	$ 7.28	$ 6.43	$ 7.31