Condensed Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 140.8	$ 110.5	$ 445.8	$ 286.2
Currency translation adjustments:
Foreign currency translation adjustments	(26.4)	(13.5)	(51.5)	(10.8)
Reclassification of currency translation losses included in net income			0.5	0.0
Defined benefit pension and post-retirement plans, net of taxes of $(1.1) and $(0.7); $(2.9) and $(2.1)	3.3	2.0	8.8	6.1
Unrealized losses on investments, net of taxes of $0.3 and $0.1; $0.7 and $0.1	(0.9)	(0.2)	(2.1)	(0.3)
Unrealized gains on cash flow hedges, net of taxes of $(0.3) and $(0.2); $(0.3) and $(0.3)	1.0	0.8	0.9	1.1
Other comprehensive (loss) income	(23.0)	(10.9)	(43.4)	(3.9)
Comprehensive income	117.8	99.6	402.4	282.3
Less: Comprehensive income attributable to noncontrolling interest	1.7	2.1	4.5	4.3
Comprehensive income attributable to Hubbell Incorporated	$ 116.1	$ 97.5	$ 397.9	$ 278.0