Business Acquisitions and Dispositions - Schedule of Business Acquisition, Pro Forma Information (Details) - 2026 Acquisitions - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Business Combination, Pro Forma Information [Line Items]
Net sales	$ 1,821.8	$ 1,612.8	$ 3,475.1	$ 3,091.3
Net income attributable to Hubbell	$ 248.4	$ 225.3	$ 419.5	$ 329.9