Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 783.5	$ 766.0	$ 551.4
Currency translation adjustment:
Foreign currency translation adjustments	(60.3)	22.9	(27.9)
Reclassification of currency translation gains included in net income	0.0	0.0	0.5
Defined benefit pension and post-retirement plans, net of taxes of $4.6, $(4.2) and $(4.8)	(15.0)	10.2	14.2
Unrealized gain (loss) on investments, net of taxes of $0.0, $(0.2) and $0.4	(0.1)	0.6	(1.4)
Unrealized gains (losses) on cash flow hedges, net of taxes of $(0.6), $0.4 and $(0.1)	1.3	(0.9)	0.2
Other comprehensive (loss) income	(74.1)	32.8	(14.4)
Comprehensive income	709.4	798.8	537.0
Less: Comprehensive income attributable to noncontrolling interest	5.7	6.2	5.5
COMPREHENSIVE INCOME ATTRIBUTABLE TO HUBBELL	$ 703.7	$ 792.6	$ 531.5