Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2021	Feb. 17, 2022	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Entity Registrant Name	EMPLOYERS HOLDINGS, INC.
Entity Central Index Key	0001379041
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Interactive Data Current	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Well-known Seasoned Issuer	Yes
ICFR Auditor Attestation Flag	true
Entity Public Float			$ 858,824,115
Entity Common Stock Shares Outstanding (in shares)		27,729,463
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Title of 12(b) Security	Common Stock, $0.01 par value per share
Trading Symbol	EIG
Security Exchange Name	NYSE
Entity File Number	001-33245
Entity Incorporation, State or Country Code	NV
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
Document Annual Report	true
Document Transition Report	false
Documents Incorporated by Reference	Portions of the registrant's Definitive Proxy Statement relating to the 2022 Annual Meeting of Stockholders are incorporated by reference in Items 11, 12, 13 and 14 of Part III of this report.