| Document and Entity Information | Mar. 03, 2021 |
| Cover [Abstract] | |
| Entity Registrant Name | HUBBELL INC |
| Amendment Flag | false |
| Entity Central Index Key | 0000048898 |
| Document Type | 8-K |
| Document Period End Date | Mar. 3, 2021 |
| Entity Incorporation State Country Code | CT |
| Entity File Number | 1-2958 |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock - par value $0.01 per share |
| Trading Symbol | HUBB |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
