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INVESTMENTS - Schedule of Allowance For Credit Loss Rollforward (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ (54)	$ (30)
Credit losses on securities where credit losses were not previously recorded	(12)	(13)
Increases in allowance on previously impaired securities	0	0
Decreases in allowance on previously impaired securities	0	0
Reduction in allowance due to disposals	5	1
Balance, end of period	(62)	(42)
Corporate securities
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	(45)	(19)
Credit losses on securities where credit losses were not previously recorded	(12)	(2)
Increases in allowance on previously impaired securities	0	0
Decreases in allowance on previously impaired securities	0	0
Reduction in allowance due to disposals	2	1
Balance, end of period	(55)	(20)
Asset-backed securities
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	0	(8)
Credit losses on securities where credit losses were not previously recorded		0
Increases in allowance on previously impaired securities		0
Decreases in allowance on previously impaired securities		0
Reduction in allowance due to disposals		0
Balance, end of period	0	(8)
Foreign corporate securities
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	(10)	(3)
Credit losses on securities where credit losses were not previously recorded	0	(11)
Increases in allowance on previously impaired securities	0	0
Decreases in allowance on previously impaired securities	0	0
Reduction in allowance due to disposals	3	0
Balance, end of period	$ (7)	$ (14)

X

- Definition

Debt Securities, Available-For-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Not To Sell Before Recovery, Credit Loss, Previously Recorded, Expense

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Debt Securities, Available-For-Sale, Excluding Accrued Interest, Allowance For Credit Loss, Not To Sell Before Recovery, Credit Loss, Previously Recorded, Reversal

+ References

No definition available.

+ Details

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Namespace Prefix:	everestre_
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Balance Type:	credit
Period Type:	duration

X

- Definition

Amount excluding accrued interest, of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

+ Details

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Data Type:	xbrli:monetaryItemType
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X

- Definition

Amount, excluding accrued interest, of credit loss expense on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) with no credit loss previously recorded.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455

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X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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X

- Definition

Amount, excluding accrued interest, of decrease in allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) from sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 50
-Paragraph 9
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455

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