Condensed Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 202.0	$ 140.8	$ 593.6	$ 445.8
Currency translation adjustments:
Foreign currency translation adjustments	(12.8)	(26.4)	0.5	(51.5)
Reclassification of currency translation losses included in net income	0.0	0.0	0.0	0.5
Defined benefit pension and post-retirement plans, net of taxes	1.9	3.3	5.3	8.8
Unrealized gain (loss) on investments, net of taxes	(0.3)	(0.9)	(0.3)	(2.1)
Unrealized gain (loss) on cash flow hedges, net of taxes	0.4	1.0	(0.5)	0.9
Other comprehensive income (loss)	(10.8)	(23.0)	5.0	(43.4)
Comprehensive income	191.2	117.8	598.6	402.4
Less: Comprehensive income attributable to noncontrolling interest	1.9	1.7	4.8	4.5
Comprehensive income attributable to Hubbell Incorporated	$ 189.3	$ 116.1	$ 593.8	$ 397.9