Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Numerator:
Net income attributable to Hubbell Incorporated	$ 224.2	$ 255.5	$ 244.2	$ 163.2	$ 198.2	$ 226.2	$ 217.5	$ 137.1	$ 887.1	$ 779.0	$ 751.4
Less: Earnings allocated to participating securities									(1.5)	(1.5)	(1.8)
Net income available to common shareholders									$ 885.6	$ 777.5	$ 749.6
Denominator:
Average number of common shares outstanding (in shares)									53.2	53.7	53.6
Potential dilutive shares (in shares)									0.3	0.3	0.4
Average number of diluted shares outstanding (in shares)									53.5	54.0	54.0
Earnings per share:
Basic earnings per share (USD per share)	$ 4.21	$ 4.80	$ 4.58	$ 3.04	$ 3.69	$ 4.21	$ 4.04	$ 2.55	$ 16.63	$ 14.49	$ 13.98
Diluted earnings per share (USD per share)	$ 4.19	$ 4.77	$ 4.56	$ 3.03	$ 3.66	$ 4.18	$ 4.01	$ 2.53	$ 16.54	$ 14.39	$ 13.89