Condensed Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 256.7	$ 227.8	$ 666.7	$ 585.3
Other comprehensive income (loss):
Foreign currency translation adjustments	1.0	17.7	49.3	(13.2)
Defined benefit pension and post-retirement plans, net of taxes of $(0.6), $(0.6), $(1.9), and $(1.8)	2.2	1.9	6.7	6.1
Unrealized gain on investments, net of taxes of $(0.1), $(0.2), $(0.3), and $(0.1)	0.3	0.8	0.8	0.4
Unrealized (gain) loss on cash flow hedges, net of taxes of $(0.1), $0.1, $0.4, and $(0.1)	0.5	(0.4)	(1.0)	0.1
Other comprehensive income (loss)	4.0	20.0	55.8	(6.6)
Comprehensive income	260.7	247.8	722.5	578.7
Less: Comprehensive income attributable to noncontrolling interest	1.2	1.6	3.8	4.5
Comprehensive income attributable to Hubbell Incorporated	$ 259.5	$ 246.2	$ 718.7	$ 574.2