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v3.22.4

Segment Reporting (Narrative) (Details) | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Segment Reporting [Abstract] |  |  |
Percentage threshold of Company revenue not exceeded by any other country | 20.00% | 20.50% | 20.10%

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- References No definition available. + Details
Name: | re_PercentageThresholdOfCompanyRevenueNotExceededByAnyOtherCountry
Namespace Prefix: | re_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_SegmentReportingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration