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INVESTMENTS - Schedule of Held-to-Maturity, Allowance for Credit Loss Rollforward (Details) $ in Millions | 3 Months Ended
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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)

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- 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

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

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- Definition Debt Securities, Held-To-Maturity, Excluding Accrued Interest, Allowance for Credit Loss, Securities Sold + References No definition available. + Details
Name: | everestre_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAllowanceForCreditLossSecuritiesSold
Namespace Prefix: | everestre_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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

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- Details
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Balance Type: |
Period Type: |

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