XML 74 R62.htm IDEA: XBRL DOCUMENT v3.21.1

Collateralized Reinsurance And Trust Agreements (Narrative) (Details) $ in Thousands							3 Months Ended		12 Months Ended
	Apr. 08, 2021 USD ($)	Dec. 12, 2019 USD ($) Item	Apr. 30, 2018 USD ($) Item	Apr. 01, 2018 USD ($)	Apr. 13, 2017 USD ($) Item	Dec. 01, 2015 USD ($) Item	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Effects of Reinsurance [Line Items]
Amount on deposit in trust accounts							$ 1,293,107
Preferred shares
Reinsurance coverage amount							$ 99,110	$ 110,188
Catastrophe Reinsurance Agreement 3 [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount					$ 325,000
Catastrophe Reinsurance Agreement 4 [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount					50,000
Catastrophe Reinsurance Agreement 5 [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount					75,000
Catastrophe Reinsurance Agreement 6 [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount					$ 175,000
Catastrophe Reinsurance Series 2015-1 Notes [Member]
Effects of Reinsurance [Line Items]
Catastrophe reinsurance bonds funded amount						$ 625,000
Kilimanjaro Re Limited [Member]
Effects of Reinsurance [Line Items]
Number of collateralized reinsurance agreements | Item					6	2
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance [Member]
Effects of Reinsurance [Line Items]
Number of collateralized reinsurance agreements | Item		4	4
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Agreement 1 And 2 [Member]
Effects of Reinsurance [Line Items]
Number of collateralized reinsurance agreements | Item		2	2
Reinsurance contract term		4 years	4 years
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Agreement 1 Through 3 [Member]
Effects of Reinsurance [Line Items]
Number of collateralized reinsurance agreements | Item					3
Reinsurance contract term					4 years
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Agreement 1 Through 3 [Member] | Subsequent Event [Member]
Effects of Reinsurance [Line Items]
Reinsurance contract term	4 years
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Agreement 3 And 4 [Member]
Effects of Reinsurance [Line Items]
Number of collateralized reinsurance agreements | Item		2	2
Reinsurance contract term		5 years	5 years
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Agreement 4 Through 6 [Member]
Effects of Reinsurance [Line Items]
Number of collateralized reinsurance agreements | Item					3
Reinsurance contract term					5 years
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Agreement 4 Through 6 [Member] | Subsequent Event [Member]
Effects of Reinsurance [Line Items]
Reinsurance contract term	5 years
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Agreement 1 [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount		$ 150,000	$ 62,500		$ 225,000	$ 300,000
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Agreement 1 [Member] | Maximum [Member] | Subsequent Event [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount	$ 150,000
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Agreement 2 [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount		275,000	200,000		400,000	$ 325,000
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Agreement 2 [Member] | Maximum [Member] | Subsequent Event [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount	85,000
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Agreement 3 [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount		150,000	62,500
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Agreement 3 [Member] | Maximum [Member] | Subsequent Event [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount	85,000
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Agreement 4 [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount		275,000	200,000
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Agreement 4 [Member] | Maximum [Member] | Subsequent Event [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount	150,000
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Agreement 5 [Member] | Maximum [Member] | Subsequent Event [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount	90,000
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Agreement 6 [Member] | Maximum [Member] | Subsequent Event [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount	90,000
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Series 2017-2 Notes [Member]
Effects of Reinsurance [Line Items]
Catastrophe reinsurance bonds funded amount					300,000
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Series 2017-1 Notes [Member]
Effects of Reinsurance [Line Items]
Catastrophe reinsurance bonds funded amount					$ 950,000
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Series 2018-1 Notes [Member]
Effects of Reinsurance [Line Items]
Catastrophe reinsurance bonds funded amount			262,500
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Series 2018-2 Notes [Member]
Effects of Reinsurance [Line Items]
Catastrophe reinsurance bonds funded amount			$ 262,500
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Series 2019-1 Notes [Member]
Effects of Reinsurance [Line Items]
Catastrophe reinsurance bonds funded amount		425,000
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Series 2019-2 Notes [Member]
Effects of Reinsurance [Line Items]
Catastrophe reinsurance bonds funded amount		$ 425,000
Kilimanjaro Re Limited [Member] | Series 2021-1 Notes [Member] | Subsequent Event [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount	320,000
Kilimanjaro Re Limited [Member] | Series 2021-2 Notes [Member] | Subsequent Event [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount	$ 330,000
Mt Logan Re [Member]
Effects of Reinsurance [Line Items]
Percentage of voting common shares owned by Group							100.00%
Assumed net risk exposures							$ 920,339		806,564
Net risk exposure investments							$ 70,419		$ 67,645
Retrocede amount				$ 269,198
Cash transferred				252,000
Mt Logan Re [Member] | Minimum [Member]
Effects of Reinsurance [Line Items]
Accident year							2002
Mt Logan Re [Member] | Maximum [Member]
Effects of Reinsurance [Line Items]
Accident year							2015
Liability retroceded				$ 319,000

X

- Definition

Accident year

+ References

No definition available.

+ Details

Name:	re_AccidentYear
Namespace Prefix:	re_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Cash transferred

+ References

No definition available.

+ Details

Name:	re_CashTransferred
Namespace Prefix:	re_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Catastrophe Reinsurance Bonds Funded Amount

+ References

No definition available.

+ Details

Name:	re_CatastropheReinsuranceBondsFundedAmount
Namespace Prefix:	re_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	re_NetRiskExposureInvestments
Namespace Prefix:	re_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Number Of Collateralized Reinsurance Agreements

+ References

No definition available.

+ Details

Name:	re_NumberOfCollateralizedReinsuranceAgreements
Namespace Prefix:	re_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Reinsurance Contract Term

+ References

No definition available.

+ Details

Name:	re_ReinsuranceContractTerm
Namespace Prefix:	re_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Retrocede amount

+ References

No definition available.

+ Details

Name:	re_RetrocedeAmount
Namespace Prefix:	re_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of written premiums ceded to other entities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 605
-Section 50
-Paragraph 1
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 605
-Section 50
-Paragraph 1
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547

+ Details

Name:	us-gaap_CededPremiumsWritten
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Maximum amount of loss due to credit risk that, based on the gross fair value of the financial instrument, the entity would incur if parties to the financial instruments that make up the concentration failed completely to perform according to the terms of the contracts and the collateral or other security, if any, for the amount due proved to be of no value to the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13537-108611

+ Details

Name:	us-gaap_ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- 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

Name:	us-gaap_EffectsOfReinsuranceLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of liabilities, classified as other, assumed in acquiring a business or in consideration for an asset received in a noncash or part noncash acquisition.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4313-108586

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4304-108586

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4332-108586

+ Details

Name:	us-gaap_NoncashOrPartNoncashAcquisitionOtherLiabilitiesAssumed1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_PreferredStockValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The amount of an asset, typically cash, provided to a counterparty to provide certain assurance of performance by the entity pursuant to the terms of a written or oral agreement, such as a lease.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.8,17)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_SecurityDeposit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 5A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121559654&loc=SL6759159-111685

+ Details

Name:	us-gaap_VariableInterestEntityOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_ProductOrServiceAxis=re_CatastropheReinsuranceAgreement3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=re_CatastropheReinsuranceAgreement4Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=re_CatastropheReinsuranceAgreement5Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=re_CatastropheReinsuranceAgreement6Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=re_CatastropheReinsuranceSeries20151NotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=re_KilimanjaroReLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=re_CatastropheReinsuranceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=re_CatastropheReinsuranceAgreement1And2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=re_CatastropheReinsuranceAgreement1Through3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=re_CatastropheReinsuranceAgreement3And4Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=re_CatastropheReinsuranceAgreement4Through6Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=re_CatastropheReinsuranceAgreement1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=re_CatastropheReinsuranceAgreement2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=re_CatastropheReinsuranceSeries201702NotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=re_CatastropheReinsuranceSeries201701NotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=re_CatastropheReinsuranceSeries20181NotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=re_CatastropheReinsuranceSeries20182NotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=re_CatastropheReinsuranceSeries20191NotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=re_CatastropheReinsuranceSeries20192NotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=re_CatastropheReinsuranceSeriesTwentyTwentyOneOneNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=re_CatastropheReinsuranceSeriesTwentyTwentyOneTwoNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=re_MtLoganReMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: