Dividend Restrictions And Statutory Financial Information (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 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	$ 3,100.0	$ 2,900.0
Statutory net income (loss)	$ 680.7	222.8	$ 503.6
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	$ 578.9
Statutory capital and surplus	5,800.0	5,300.0
Statutory net income (loss)	$ 336.1	$ 595.1	$ (363.0)