Cover - USD ($)	12 Months Ended
	Dec. 31, 2021	Feb. 08, 2022	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Current Fiscal Year End Date	--12-31
Document Period End Date	Dec. 31, 2021
Document Transition Report	false
Entity File Number	1-2958
Entity Registrant Name	HUBBELL INC
Entity Incorporation, State or Country Code	CT
Entity Tax Identification Number	06-0397030
Entity Address, Address Line One	40 Waterview Drive
Entity Address, City or Town	Shelton
Entity Address, State or Province	CT
Entity Address, Postal Zip Code	06484
City Area Code	(475)
Local Phone Number	882-4000
Title of 12(b) Security	Common Stock — par value $0.01 per share
Trading Symbol	HUBB
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 10,107,258,151
Entity Common Stock, Shares Outstanding		54,409,067
Documents Incorporated by Reference	Portions of the definitive proxy statement for the registrant's 2022 annual meeting of shareholders to be filed with the Securities and Exchange Commission (the “SEC”), are incorporated by reference in answer to Part III of this Form 10-K.
Entity Central Index Key	0000048898
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	false