Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Nov. 01, 2020
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity File Number	1-15731
Entity Registrant Name	EVEREST RE GROUP, LTD.
Entity Central Index Key	0001095073
Entity Tax Identification Number	98-0365432
Entity Incorporation State Country Code	D0
Entity Address Address Line 1	Seon Place – 4th Floor
Entity Address Address Line 2	141 Front Street
Entity Address Address Line 3	PO Box HM 845
Entity Address City Or Town	Hamilton
Entity Address Postal Zip Code	HM 19
Entity Address Country	BM
City Area Code	441
Local Phone Number	295-0006
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Security 12b Title	Common Shares, $0.01 par value
Trading Symbol	RE
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding		39,965,673