Significant Accounting Policies - Schedule of Change in Accounting Principle (Details) - USD ($) $ / shares in Units, $ 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	Jan. 01, 2023
Consolidated Statement of Income
Net sales	$ 1,492.7	$ 1,502.4	$ 1,484.3	$ 1,365.2	$ 1,334.3	$ 1,442.6	$ 1,452.5	$ 1,399.1	$ 5,844.6	$ 5,628.5	$ 5,372.9
Cost of goods sold	967.6	958.1	932.2	922.6	882.1	936.6	938.7	965.5	3,780.5	3,722.9	3,495.9
Operating Income									1,208.8	1,093.1	1,027.4
Income before income taxes									1,119.1	1,006.8	972.2
Provision for income taxes									227.2	222.1	214.6
Net income	225.2	256.7	245.5	164.5	199.4	227.8	219.1	138.4	891.9	784.7	757.6
Less: Net income attributable to noncontrolling interest									(4.8)	(5.7)	(6.2)
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
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
Condensed Balance Sheet
Inventories, net	$ 1,083.8				$ 1,010.4				$ 1,083.8	$ 1,010.4
Total Current Assets	2,594.0				2,257.9				2,594.0	2,257.9
TOTAL ASSETS	8,228.8				6,847.7				8,228.8	6,847.7	$ 7,081.1
Other accrued liabilities	450.7				372.4				450.7	372.4
Total Current Liabilities	1,508.7				1,274.2				1,508.7	1,274.2
Other Non-Current Liabilities	825.9				720.2				825.9	720.2
TOTAL LIABILITIES	4,370.9				3,437.1				4,370.9	3,437.1
Hubbell Incorporated Shareholders' Equity	3,847.9				3,396.2				3,847.9	3,396.2
TOTAL EQUITY	3,857.9				3,410.6				3,857.9	3,410.6
TOTAL LIABILITIES AND EQUITY	8,228.8				6,847.7				8,228.8	6,847.7
Condensed Statement of Cash Flows
Net income	225.2	$ 256.7	$ 245.5	$ 164.5	199.4	$ 227.8	$ 219.1	$ 138.4	891.9	784.7	757.6
Adjustments to reconcile net income to net cash provided by operating activities, net of acquisitions:
Deferred income taxes									11.0	2.0	(18.9)
Changes in assets and liabilities, net of acquisitions:
(Increase) Decrease in inventories, net									(32.3)	(24.2)	(31.0)
Net cash provided by operating activities									1,029.8	991.2	880.8
As Computed Under LIFO
Consolidated Statement of Income
Net sales									5,844.6	5,628.5	5,372.9
Cost of goods sold									3,843.2	3,724.4	3,484.8
Operating Income									1,146.1	1,091.6	1,038.5
Income before income taxes									1,056.4	1,005.3	983.3
Provision for income taxes									212.3	221.8	217.3
Net income									844.1	783.5	766.0
Less: Net income attributable to noncontrolling interest									(4.8)	(5.7)	(6.2)
Net income attributable to Hubbell Incorporated									$ 839.3	$ 777.8	$ 759.8
Earnings per share:
Basic earnings per share (USD per share)									$ 15.73	$ 14.46	$ 14.14
Diluted earnings per share (USD per share)									$ 15.65	$ 14.37	$ 14.05
Condensed Balance Sheet
Inventories, net	852.5				841.8				$ 852.5	$ 841.8
Total Current Assets	2,362.7				2,089.3				2,362.7	2,089.3
TOTAL ASSETS	7,997.5				6,679.1				7,997.5	6,679.1
Other accrued liabilities	422.6				372.4				422.6	372.4
Total Current Liabilities	1,480.6				1,274.2				1,480.6	1,274.2
Other Non-Current Liabilities	798.4				679.5				798.4	679.5
TOTAL LIABILITIES	4,315.3				3,396.4				4,315.3	3,396.4
Hubbell Incorporated Shareholders' Equity	3,672.2				3,268.3				3,672.2	3,268.3
TOTAL EQUITY	3,682.2				3,282.7				3,682.2	3,282.7
TOTAL LIABILITIES AND EQUITY	7,997.5				6,679.1				7,997.5	6,679.1
Condensed Statement of Cash Flows
Net income									844.1	783.5	$ 766.0
Adjustments to reconcile net income to net cash provided by operating activities, net of acquisitions:
Deferred income taxes										1.7	(16.2)
Changes in assets and liabilities, net of acquisitions:
(Increase) Decrease in inventories, net										(22.7)	(42.1)
Net cash provided by operating activities										991.2	880.8
Impact of Change
Consolidated Statement of Income
Net sales									0.0	0.0	0.0
Cost of goods sold									(62.7)	(1.5)	11.1
Operating Income									62.7	1.5	(11.1)
Income before income taxes									62.7	1.5	(11.1)
Provision for income taxes									14.9	0.3	(2.7)
Net income									47.8	1.2	(8.4)
Less: Net income attributable to noncontrolling interest									0.0	0.0	0.0
Net income attributable to Hubbell Incorporated									$ 47.8	$ 1.2	$ (8.4)
Earnings per share:
Basic earnings per share (USD per share)									$ 0.90	$ 0.03	$ (0.16)
Diluted earnings per share (USD per share)									$ 0.89	$ 0.02	$ (0.16)
Condensed Balance Sheet
Inventories, net	231.3				168.6				$ 231.3	$ 168.6		$ 178.2
Total Current Assets	231.3				168.6				231.3	168.6
TOTAL ASSETS	231.3				168.6				231.3	168.6
Other accrued liabilities	28.1				0.0				28.1	0.0
Total Current Liabilities	28.1				0.0				28.1	0.0
Other Non-Current Liabilities	27.5				40.7				27.5	40.7
TOTAL LIABILITIES	55.6				40.7				55.6	40.7
Hubbell Incorporated Shareholders' Equity	175.7				127.9				175.7	127.9
TOTAL EQUITY	175.7				127.9				175.7	127.9
TOTAL LIABILITIES AND EQUITY	$ 231.3				$ 168.6				231.3	168.6
Condensed Statement of Cash Flows
Net income									$ 47.8	1.2	$ (8.4)
Adjustments to reconcile net income to net cash provided by operating activities, net of acquisitions:
Deferred income taxes										0.3	(2.7)
Changes in assets and liabilities, net of acquisitions:
(Increase) Decrease in inventories, net										(1.5)	11.1
Net cash provided by operating activities										$ 0.0	$ 0.0