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INVESTMENTS - Schedule of Held-to-Maturity, Allowance for Credit Loss Rollforward (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($)
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ (9)
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	(9)
Corporate securities
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Roll Forward]
Beginning Balance	(2)
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	(2)
Asset-backed securities
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Roll Forward]
Beginning Balance	(6)
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	(6)
Foreign corporate securities
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Roll Forward]
Beginning Balance	(1)
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	$ (1)

X

- Definition

Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Not Previously Recorded

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	duration

X

- Definition

Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Not To Sell Before Recovery, Credit Loss, Previously Recorded, Expense

+ References

No definition available.

+ Details

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X

- Definition

Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Not To Sell Before Recovery, Credit Loss, Previously Recorded, Reversal

+ References

No definition available.

+ Details

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

X

- Definition

Debt Securities, Held-To-Maturity, Excluding Accrued Interest, Allowance for Credit Loss, Securities Sold

+ References

No definition available.

+ Details

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Namespace Prefix:	everestre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount, excluding accrued interest, of allowance for credit loss on investment in debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

+ Details

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Balance Type:	credit
Period Type:	instant

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

- Details

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Balance Type:
Period Type:

X

- Details

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

X

- Details

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