Related-Party Transactions (Affiliated Quota Share Reinsurance Agreements For All New And Renewal Business For The Indicated Coverage Period) (Details) - 6 months ended Jun. 30, 2021	CAD ($)	USD ($)
Coverage Period 01/01/2010-12/31/2010 [Member]
Related Party Transaction [Line Items]
Ceding Company	Everest Re	Everest Re
Percent Ceded	44.00%	44.00%
Assuming Company	Bermuda Re	Bermuda Re
Type of Business	property / casualty business	property / casualty business
Single Occurrence Limit		$ 150,000,000
Aggregate Limit		$ 325,000,000
Coverage Period 01/01/2011-12/31/2011 [Member]
Related Party Transaction [Line Items]
Ceding Company	Everest Re	Everest Re
Percent Ceded	50.00%	50.00%
Assuming Company	Bermuda Re	Bermuda Re
Type of Business	property / casualty business	property / casualty business
Single Occurrence Limit		$ 150,000,000
Aggregate Limit		$ 300,000,000
Coverage Period 01/01/2012-12/31/2014 [Member]
Related Party Transaction [Line Items]
Ceding Company	Everest Re	Everest Re
Percent Ceded	50.00%	50.00%
Assuming Company	Bermuda Re	Bermuda Re
Type of Business	property / casualty business	property / casualty business
Single Occurrence Limit		$ 100,000,000
Aggregate Limit		$ 200,000,000
Coverage Period 01/01/2015-12/31/2016 [Member]
Related Party Transaction [Line Items]
Ceding Company	Everest Re	Everest Re
Percent Ceded	50.00%	50.00%
Assuming Company	Bermuda Re	Bermuda Re
Type of Business	property / casualty business	property / casualty business
Single Occurrence Limit		$ 162,500,000
Aggregate Limit		$ 325,000,000
Coverage Period 01/01/2017-12/31/2017 [Member]
Related Party Transaction [Line Items]
Ceding Company	Everest Re	Everest Re
Percent Ceded	60.00%	60.00%
Assuming Company	Bermuda Re	Bermuda Re
Type of Business	property / casualty business	property / casualty business
Single Occurrence Limit		$ 219,000,000
Aggregate Limit		$ 438,000,000
Coverage Period 01/01/2010-12/31/2010 [Member]
Related Party Transaction [Line Items]
Ceding Company	Everest Re- Canadian Branch	Everest Re- Canadian Branch
Percent Ceded	60.00%	60.00%
Assuming Company	Bermuda Re	Bermuda Re
Type of Business	property business	property business
Single Occurrence Limit	$ 350,000,000
Aggregate Limit
Coverage Period 01/01/2011-12/31/2011 [Member]
Related Party Transaction [Line Items]
Ceding Company	Everest Re- Canadian Branch	Everest Re- Canadian Branch
Percent Ceded	60.00%	60.00%
Assuming Company	Bermuda Re	Bermuda Re
Type of Business	property business	property business
Single Occurrence Limit	$ 350,000,000
Aggregate Limit
Coverage Period 01/01/2012-12/31/2012 [Member]
Related Party Transaction [Line Items]
Ceding Company	Everest Re- Canadian Branch	Everest Re- Canadian Branch
Percent Ceded	75.00%	75.00%
Assuming Company	Bermuda Re	Bermuda Re
Type of Business	property / casualty business	property / casualty business
Single Occurrence Limit	$ 206,250,000
Aggregate Limit	$ 412,500,000
Coverage Period 01/01/2013-12/31/2013 [Member]
Related Party Transaction [Line Items]
Ceding Company	Everest Re- Canadian Branch	Everest Re- Canadian Branch
Percent Ceded	75.00%	75.00%
Assuming Company	Bermuda Re	Bermuda Re
Type of Business	property / casualty business	property / casualty business
Single Occurrence Limit	$ 150,000,000
Aggregate Limit	$ 412,500,000
Coverage Period 01/01/2014-12/31/2017 [Member]
Related Party Transaction [Line Items]
Ceding Company	Everest Re- Canadian Branch	Everest Re- Canadian Branch
Percent Ceded	75.00%	75.00%
Assuming Company	Bermuda Re	Bermuda Re
Type of Business	property / casualty business	property / casualty business
Single Occurrence Limit	$ 262,500,000
Aggregate Limit	$ 412,500,000
Coverage Period 01/01/2012-12/31/2017 [Member]
Related Party Transaction [Line Items]
Ceding Company	Everest Canada	Everest Canada
Percent Ceded	80.00%	80.00%
Assuming Company	Everest Re- Canadian Branch	Everest Re- Canadian Branch
Type of Business	property business	property business
Single Occurrence Limit
Aggregate Limit
Coverage Period 01/01/2020
Related Party Transaction [Line Items]
Ceding Company	Everest International Assurance	Everest International Assurance
Percent Ceded	100.00%	100.00%
Assuming Company	Bermuda Re	Bermuda Re
Type of Business	life business	life business
Single Occurrence Limit
Aggregate Limit