v3.25.2
COVER - shares
6 Months Ended
Jun. 30, 2025
Aug. 12, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Entity File Number 1-14527  
Entity Registrant Name EVEREST REINSURANCE HOLDINGS, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 22-3263609  
Entity Address, Address Line One 100 Everest Way  
Entity Address, City or Town Warren  
Entity Address, State or Province NJ  
Entity Address, Postal Zip Code 07059  
City Area Code 908  
Local Phone Number 604-3000  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Title of 12(b) Security Common Shares, $0.01 par value  
Entity Common Stock, Shares Outstanding   1,000
Entity Central Index Key 0000914748  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Amendment Flag false  
No Trading Symbol true