Condensed Consolidated Statements of Income (unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net sales	$ 1,213.6	$ 1,108.6	$ 3,483.8	$ 3,148.1
Cost of goods sold	883.3	779.0	2,532.9	2,224.5
Gross profit	330.3	329.6	950.9	923.6
Selling & administrative expenses	175.0	166.7	525.3	510.4
Operating income	155.3	162.9	425.6	413.2
Interest expense, net	(13.5)	(15.0)	(41.4)	(45.8)
Loss on disposition of business	(0.1)	0.0	(6.9)	0.0
Loss on extinguishment of debt	0.0	0.0	(16.8)	0.0
Pension charge	0.0	(6.6)	0.0	(6.6)
Other expense, net	(1.2)	(2.3)	(3.1)	(8.9)
Total other expense	(14.8)	(23.9)	(68.2)	(61.3)
Income before income taxes	140.5	139.0	357.4	351.9
Provision for income taxes	29.9	30.4	71.1	78.5
Net income	110.6	108.6	286.3	273.4
Less: Net income attributable to noncontrolling interest	2.1	1.5	4.3	3.1
Net income attributable to Hubbell Incorporated	$ 108.5	$ 107.1	$ 282.0	$ 270.3
Earnings per share
Basic (USD per share)	$ 1.99	$ 1.97	$ 5.18	$ 4.97
Diluted (USD per share)	1.98	1.96	5.14	4.95
Cash dividends per common share (USD per share)	$ 0.98	$ 0.91	$ 2.94	$ 2.73