Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 89.1	$ 97.9	$ 164.8	$ 171.7
Other comprehensive (loss) income:
Foreign currency translation adjustments	1.8	(3.8)	(23.8)	3.3
Defined benefit pension and post-retirement plans, net of taxes of $(0.5) and $(0.6)	1.8	1.9	3.5	3.4
Available-for-sale investments, net of taxes of $(0.1) and $(0.1)	0.5	0.3	0.4	0.6
Unrealized gain (loss) on cash flow hedges, net of taxes of $0.3 and $0.3	(0.7)	(0.7)	0.9	(1.3)
Other comprehensive (loss) income	3.4	(2.3)	(19.0)	6.0
Total comprehensive income	92.5	95.6	145.8	177.7
Less: Comprehensive income attributable to noncontrolling interest	0.9	1.9	1.6	3.4
Comprehensive income attributable to Hubbell Incorporated	$ 91.6	$ 93.7	$ 144.2	$ 174.3