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COLLATERALIZED REINSURANCE AND TRUST AGREEMENTS - Premiums and Losses Ceded to Affiliate (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Collateralized Reinsurance And Trust Agreements [Abstract]
Ceded written premiums	$ 53	$ 50
Ceded earned premiums	46	50
Ceded losses and LAE	36	41
Assumed written premiums	1	1
Assumed earned premiums	1	1
Assumed losses and LAE	$ 0	$ 0

X

- Definition

Assumed Earned Premiums

+ References

No definition available.

+ Details

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- Definition

Assumed Losses And Loss Adjustment Expenses

+ References

No definition available.

+ Details

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- Definition

Ceded Earned Premiums

+ References

No definition available.

+ Details

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Balance Type:	debit
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- Definition

Ceded Losses And Loss Adjustment Expenses

+ References

No definition available.

+ Details

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Namespace Prefix:	everestre_
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- Definition

Collateralized Reinsurance And Trust Agreements[Abstract]

+ References

No definition available.

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- Definition

Amount of written premiums assumed from other entities.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 605
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI https://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547

+ Details

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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 https://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 https://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547

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