Condensed Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net sales	$ 1,087.3	$ 991.2
Cost of goods sold	780.0	708.3
Gross profit	307.3	282.9
Selling & administrative expenses	186.4	183.3
Operating income	120.9	99.6
Interest expense, net	(17.5)	(17.3)
Other expense, net	(5.4)	(6.5)
Total other expense	(22.9)	(23.8)
Income before income taxes	98.0	75.8
Provision for income taxes	24.2	16.0
Net income	73.8	59.8
Less: Net income attributable to noncontrolling interest	1.5	1.5
Net income attributable to Hubbell	$ 72.3	$ 58.3
Earnings per share
Basic (USD per share)	$ 1.32	$ 1.06
Diluted (USD per share)	1.32	1.05
Cash dividends per common share (USD per share)	$ 0.84	$ 0.77