v3.26.1
CREDIT FACILITIES - Narrative (Details)
3 Months Ended
Mar. 31, 2026
USD ($)
Mar. 31, 2025
USD ($)
Mar. 31, 2026
GBP (£)
Mar. 31, 2026
EUR (€)
Dec. 31, 2025
USD ($)
Dec. 31, 2025
GBP (£)
Dec. 31, 2025
EUR (€)
Dec. 23, 2025
Oct. 26, 2025
GBP (£)
Aug. 18, 2025
USD ($)
Jun. 09, 2025
Dec. 30, 2024
EUR (€)
Dec. 20, 2024
Oct. 30, 2024
GBP (£)
Aug. 16, 2024
Jun. 10, 2024
USD ($)
Dec. 27, 2023
USD ($)
Dec. 30, 2022
USD ($)
Nov. 21, 2022
USD ($)
Nov. 03, 2021
USD ($)
Aug. 27, 2021
USD ($)
Aug. 09, 2021
USD ($)
Line of Credit Facility [Line Items]                                            
Line of credit facility, commitment $ 1,600,000,000                                          
Uncommitted amount available 240,000,000                                          
Extension period for availability               2 years                            
Borrowings from FHLB $ 1,019,000,000       $ 1,019,000,000                                  
Federal Home Loan Bank of New York | Everest Reinsurance Company (Everest Re)                                            
Line of Credit Facility [Line Items]                                            
Maximum percentage of admitted assets allowed for borrowing base 10.00%   10.00% 10.00%                                    
Admitted assets for FHLB $ 32,200,000,000                                          
Maximum amount available under FHLB 3,200,000,000                                          
Borrowings from FHLB 1,000,000,000.0                                          
Interest expense $ 10,000,000 $ 12,000,000                                        
Amount of borrowed funds required to be used to acquire additional membership stock, percentage 4.50%                                          
Qualifying collateral pledged $ 1,400,000,000                                          
Funds at Lloyds Syndicated Letter of Credit Facility                                            
Line of Credit Facility [Line Items]                                            
Line of credit facility, commitment | £     £ 150,000,000     £ 150,000,000     £ 150,000,000         £ 150,000,000                
Extension period for availability                 1 year                          
Commerzbank Letter of Credit Facility                                            
Line of Credit Facility [Line Items]                                            
Line of credit facility, commitment | €       € 75,000,000     € 75,000,000         € 75,000,000                    
Bermuda Re Wells Fargo Bank Bilateral LOC Facility - secured tranche                                            
Line of Credit Facility [Line Items]                                            
Line of credit facility, commitment 175,000,000       175,000,000                     $ 500,000,000            
Bermuda Re Wells Fargo Bank Bilateral Letter of Credit Facility                                            
Line of Credit Facility [Line Items]                                            
Line of credit facility, commitment 350,000,000       350,000,000                                  
Extension period for availability                     2 years                      
Bermuda Re Wells Fargo Bank Bilateral LOC Facility - unsecured tranche                                            
Line of Credit Facility [Line Items]                                            
Line of credit facility, commitment 175,000,000       175,000,000                                  
Bermuda Re Citibank Letter of Credit Facility - Uncommitted                                            
Line of Credit Facility [Line Items]                                            
Uncommitted amount available                                           $ 140,000,000
Bermuda Re Citibank Letter of Credit Facility One                                            
Line of Credit Facility [Line Items]                                            
Line of credit facility, commitment 230,000,000       230,000,000                                 $ 230,000,000
Bermuda Re Bayerische Landesbank Bilateral Secured Credit Facility                                            
Line of Credit Facility [Line Items]                                            
Line of credit facility, commitment 200,000,000       200,000,000                               $ 200,000,000  
Extension period for availability                             3 years              
Bermuda Re Bayerische Landesbank Bilateral Unsecured Letter of Credit Facility                                            
Line of Credit Facility [Line Items]                                            
Line of credit facility, commitment 150,000,000       150,000,000                         $ 150,000,000        
Extension period for availability                         2 years                  
Bermuda Re Lloyd's Bank Credit Facility - Committed                                            
Line of Credit Facility [Line Items]                                            
Line of credit facility, commitment 250,000,000       250,000,000         $ 250,000,000             $ 15,000,000          
Extension period for availability                   2 years                        
Bermuda Re Barclays Credit Facility                                            
Line of Credit Facility [Line Items]                                            
Line of credit facility, commitment 200,000,000       200,000,000                             $ 200,000,000    
Extension period for availability                           3 years                
Bermuda Re Nordea Bank Letter of Credit Facility                                            
Line of Credit Facility [Line Items]                                            
Line of credit facility, commitment 300,000,000       300,000,000                           $ 300,000,000      
Nordea Bank Letter of Credit Facility - Committed                                            
Line of Credit Facility [Line Items]                                            
Line of credit facility, commitment 200,000,000       200,000,000                           200,000,000      
Nordea Bank Letter of Credit Facility - Uncommitted                                            
Line of Credit Facility [Line Items]                                            
Line of credit facility, commitment $ 100,000,000       $ 100,000,000                           $ 100,000,000