Condensed Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Net sales	$ 949.2	$ 1,196.4	$ 2,039.5	$ 2,283.7
Cost of goods sold	668.7	839.0	1,445.5	1,619.0
Gross profit	280.5	357.4	594.0	664.7
Selling & administrative expenses	149.0	190.5	343.7	376.9
Operating income	131.5	166.9	250.3	287.8
Interest expense, net	(15.7)	(17.2)	(30.8)	(34.7)
Multi-employer pension charge (Note 14)	0.0	(22.9)	0.0	(22.9)
Other expense, net	(2.8)	(3.2)	(6.6)	(8.6)
Total other expense	(18.5)	(43.3)	(37.4)	(66.2)
Income before income taxes	113.0	123.6	212.9	221.6
Provision for income taxes	23.9	25.7	48.1	49.9
Net income	89.1	97.9	164.8	171.7
Less: Net income attributable to noncontrolling interest	0.9	1.9	1.6	3.4
Net income attributable to Hubbell Incorporated	$ 88.2	$ 96.0	$ 163.2	$ 168.3
Earnings per share
Basic (USD per share)	$ 1.62	$ 1.76	$ 3.00	$ 3.08
Diluted (USD per share)	1.62	1.75	2.99	3.07
Cash dividends per common share (USD per share)	$ 0.91	$ 0.84	$ 1.82	$ 1.68