Condensed Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Net sales	$ 1,090.3	$ 1,087.3
Cost of goods sold	776.8	780.0
Gross profit	313.5	307.3
Selling & administrative expenses	194.7	186.4
Operating income	118.8	120.9
Interest expense, net	(15.1)	(17.5)
Other expense, net	(3.8)	(5.4)
Total other expense	(18.9)	(22.9)
Income before income taxes	99.9	98.0
Provision for income taxes	24.2	24.2
Net income	75.7	73.8
Less: Net income attributable to noncontrolling interest	0.7	1.5
Net income attributable to Hubbell Incorporated	$ 75.0	$ 72.3
Earnings per share
Basic (USD per share)	$ 1.38	$ 1.32
Diluted (USD per share)	1.37	1.32
Cash dividends per common share (USD per share)	$ 0.91	$ 0.84