Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 75.7	$ 73.8
Other comprehensive (loss) income:
Foreign currency translation adjustments	(25.6)	7.1
Defined benefit pension and post-retirement plans, net of taxes of ($0.6) and ($0.5)	1.7	1.5
Available-for-sale investments, net of taxes of $0.0 and ($0.1)	(0.1)	0.3
Unrealized gain (loss) on cash flow hedges, net of taxes of ($0.6) and $0.2	1.6	(0.6)
Other comprehensive (loss) income	(22.4)	8.3
Total comprehensive income	53.3	82.1
Less: Comprehensive income attributable to noncontrolling interest	0.7	1.5
Comprehensive income attributable to Hubbell Incorporated	$ 52.6	$ 80.6