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Dividend Restrictions And Statutory Financial Information (Narrative) (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dividend Restrictions And Statutory Financial Information [Line Items]      
Minimum solvency margin $ 0.3    
Prior approval of the Bermuda Monetary Authority is required for dividend payments, if percentage exceeds in prior-year end total statutory capital 0.25    
Dividend payment restrictions, period in months 12 months    
Dividend payment restrictions, percentage of statutory surplus required 10.00%    
Minimum percent of total adjusted capital 200.00%    
Bermuda Re [Member]      
Dividend Restrictions And Statutory Financial Information [Line Items]      
Statutory capital and surplus $ 2,800.0 $ 3,100.0  
Statutory net income (loss) $ 603.0 681.0 $ 223.0
Target capital level, percent of the enhanced capital requirement 120.00%    
Everest Re [Member]      
Dividend Restrictions And Statutory Financial Information [Line Items]      
Available for payment of dividends in 2016 without need for prior regulatory approval $ 555.0    
Statutory capital and surplus 5,600.0 5,800.0  
Statutory net income (loss) $ 294.0 $ 336.0 $ (595.0)