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v3.20.4

Leases (Narrative) (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 USD ($) | Jul. 02, 2019 ft²
Lease [Line Items] |  |
Area of property | ft² |  | 315,000
Annual lease expense | $ 7,800 |
Monthly lease expense | $ 650 |
Lease expiration | 2036 |

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- References No definition available. + Details
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Namespace Prefix: | re_
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Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | re_OperatingLeaseExpenseMonthlyLease
Namespace Prefix: | re_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Area of a real estate property. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918638-209977 + Details
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