INVESTMENTS - Schedule of Aggregate Fair Value and Gross Unrealized Depreciation of Fixed Maturity Securities by Security Type (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Fair Value
Less than 12 months	$ 5,895	$ 10,604
Greater than 12 months	7,216	7,728
Total	13,110	18,332
Gross Unrealized Depreciation
Less than 12 months	(205)	(324)
Greater than 12 months	(664)	(833)
Total	(870)	(1,157)
No Recorded Allowance for Credit Losses
Fair Value
Less than 12 months	5,858	10,587
Greater than 12 months	7,200	7,728
Total	13,059	18,315
Gross Unrealized Depreciation
Less than 12 months	(201)	(323)
Greater than 12 months	(664)	(833)
Total	(865)	(1,156)
U.S. Treasury securities and obligations of U.S. government agencies and corporations
Fair Value
Less than 12 months	156	80
Greater than 12 months	328	398
Total	485	478
Gross Unrealized Depreciation
Less than 12 months	(8)	(1)
Greater than 12 months	(21)	(23)
Total	(29)	(24)
Obligations of U.S. States and political subdivisions
Fair Value
Less than 12 months	10	9
Greater than 12 months	37	40
Total	47	48
Gross Unrealized Depreciation
Less than 12 months	(1)	0
Greater than 12 months	(6)	(5)
Total	(7)	(5)
Corporate securities
Fair Value
Less than 12 months	1,795	2,744
Greater than 12 months	2,016	2,132
Total	3,811	4,876
Gross Unrealized Depreciation
Less than 12 months	(67)	(76)
Greater than 12 months	(183)	(221)
Total	(249)	(297)
Asset-backed securities
Fair Value
Less than 12 months	843	958
Greater than 12 months	235	537
Total	1,078	1,495
Gross Unrealized Depreciation
Less than 12 months	(22)	(20)
Greater than 12 months	(8)	(19)
Total	(30)	(39)
Commercial
Fair Value
Less than 12 months		53
Greater than 12 months		757
Total		810
Gross Unrealized Depreciation
Less than 12 months		(3)
Greater than 12 months		(63)
Total		(66)
Agency commercial
Fair Value
Less than 12 months	18
Greater than 12 months	18
Total	35
Gross Unrealized Depreciation
Less than 12 months	0
Greater than 12 months	(2)
Total	(2)
Non-agency commercial
Fair Value
Less than 12 months	40
Greater than 12 months	761
Total	801
Gross Unrealized Depreciation
Less than 12 months	(2)
Greater than 12 months	(43)
Total	(45)
Agency residential
Fair Value
Less than 12 months	1,419	2,754
Greater than 12 months	1,326	1,226
Total	2,744	3,980
Gross Unrealized Depreciation
Less than 12 months	(55)	(115)
Greater than 12 months	(161)	(172)
Total	(216)	(287)
Non-agency residential
Fair Value
Less than 12 months	223	654
Greater than 12 months	6	25
Total	229	678
Gross Unrealized Depreciation
Less than 12 months	(3)	(11)
Greater than 12 months	0	0
Total	(3)	(11)
Foreign government securities
Fair Value
Less than 12 months	478	851
Greater than 12 months	767	828
Total	1,244	1,679
Gross Unrealized Depreciation
Less than 12 months	(15)	(35)
Greater than 12 months	(87)	(112)
Total	(102)	(147)
Foreign corporate securities
Fair Value
Less than 12 months	877	2,484
Greater than 12 months	1,706	1,785
Total	2,584	4,269
Gross Unrealized Depreciation
Less than 12 months	(29)	(61)
Greater than 12 months	(153)	(218)
Total	(182)	(279)
Securities where an allowance for credit loss was recorded
Fair Value
Less than 12 months	36	17
Greater than 12 months	16	0
Total	52	17
Gross Unrealized Depreciation
Less than 12 months	(5)	(1)
Greater than 12 months	0	0
Total	$ (5)	$ (1)

No definition available.

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

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 55
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479081/326-30-55-8

Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-7

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479106/326-30-50-5

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479106/326-30-50-5

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position without allowance for credit loss.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 55
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479081/326-30-55-8

Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-6

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479106/326-30-50-4

+ Details

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

- Definition

Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479106/326-30-50-4

+ Details

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

- References

No definition available.

+ Details

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

- Details

Name:	us-gaap_FinancialInstrumentAxis=eg_NoRecordedAllowanceForCreditLossesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USTreasuryAndGovernmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_DomesticCorporateDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=eg_CommercialMortgageBackedSecurityIssuedByUSGovernmentSponsoredEnterpriseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=eg_CommercialMortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=eg_ResidentialMortgageBackedSecurityIssuedByUSGovernmentSponsoredEnterpriseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=eg_ResidentialMortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_ForeignGovernmentDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_ForeignCorporateDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=eg_RecordedAnAllowanceForCreditLossesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: