| Cover Page Cover Page | Oct. 22, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Oct. 22, 2020 |
| Entity Registrant Name | EMPLOYERS HOLDINGS, INC. |
| Entity Incorporation, State or Country Code | NV |
| Entity File Number | 001-33245 |
| Entity Tax Identification Number | 04-3850065 |
| Entity Address, Address Line One | 10375 Professional Circle |
| Entity Address, City or Town | Reno, |
| Entity Address, State or Province | NV |
| Entity Address, Postal Zip Code | 89521 |
| City Area Code | 888 |
| Local Phone Number | 682-6671 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.01 par value per share |
| Trading Symbol | EIG |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001379041 |
| Amendment Flag | false |
