Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Numerator:
Net income from continuing operations attributable to Hubbell Incorporated	$ 777.8	$ 759.8	$ 511.3
Less: Earnings allocated to participating securities	(1.5)	(1.8)	(1.3)
Net income from continuing operations available to common shareholders	776.3	758.0	510.0
Net income from discontinued operations attributable to Hubbell Incorporated	0.0	0.0	34.6
Less: Earnings allocated to participating securities	0.0	0.0	(0.1)
Net income from discontinued operations available to common shareholders	0.0	0.0	34.5
Net income attributable to Hubbell Incorporated	777.8	759.8	545.9
Less: Earnings allocated to participating securities	(1.5)	(1.8)	(1.4)
Net income available to common shareholders	$ 776.3	$ 758.0	$ 544.5
Denominator:
Average number of common shares outstanding (in shares)	53.7	53.6	53.7
Potential dilutive shares (in shares)	0.3	0.4	0.4
Average number of diluted shares outstanding (in shares)	54.0	54.0	54.1
Basic earnings per share:
Basic earnings per share from continuing operations (USD per share)	$ 14.46	$ 14.14	$ 9.49
Basic earnings per share from discontinued operations (USD per share)	0	0	0.64
Basic earnings per share (USD per share)	14.46	14.14	10.13
Diluted earnings per share:
Diluted earnings per share from continuing operations (USD per share)	14.37	14.05	9.43
Diluted earnings per share from discontinued operations (USD per share)	0	0	0.64
Diluted earnings per share (USD per share)	$ 14.37	$ 14.05	$ 10.07