XML 13 R1.htm IDEA: XBRL DOCUMENT v3.21.1
Document And Entity Information - shares
 3 Months Ended
Mar. 31, 2021
May 01, 2021
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2021  
Document Fiscal Year Focus 2021  
Document Transition Report false  
Entity File Number 1-15731  
Entity Registrant Name EVEREST RE GROUP, LTD.  
Entity Incorporation State Country Code D0  
Entity Tax Identification Number 98-0365432  
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 Small Business false  
Entity Emerging Growth Company 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   40,083,525
Amendment Flag false  
Entity Central Index Key 0001095073  
Document Fiscal Period Focus Q1  
Current Fiscal Year End Date --12-31