Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Long-Term Debt, Unclassified [Abstract] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Long-term notes Subordinated Debt Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Deferred tax benefit (expense) OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax Range [Domain] Statistical Measurement [Domain] Catastrophe Losses, Other Weather Related Events Other Weather Related Events [Member] Other Weather Related Events Tax Effect Reclassification from AOCI, Current Period, Tax [Abstract] Ceded earned premiums Ceded earned premiums Ceded Premiums Earned Title of 12(b) Security Title of 12(b) Security Subsequent Events Subsequent Event [Member] Market Value Reported Value Measurement [Member] Gross investment income before adjustments Gross Investment Income Before Adjustment Gross Investment Income Before Adjustment Debt Securities, Available-for-Sale [Table] Debt Securities, Available-for-Sale [Table] Document Fiscal Year Focus Document Fiscal Year Focus Adjustment to Compensation, Amount Adjustment to Compensation Amount Financial Instrument [Axis] Financial Instrument [Axis] Other invested assets, at fair value Other invested assets, fair value Other Assets, Fair Value Disclosure Segment Reporting [Abstract] Commitments to fund investments Commitments to Fund Investments Commitments to Fund Investments Common stock, par value: $0.01; 3,000 shares authorized; 1,000 shares issued and outstanding (2026 and 2025) Common Stock, Value, Issued Subordinated Notes 6.60% Subordinated Notes 6.60% [Member] Subordinated Notes 6.6% Schedule of Outstanding Senior Notes Schedule of Long-Term Debt Instruments [Table Text Block] Increase (decrease) in unearned premiums Increase (Decrease) in Unearned Premiums Co-participation per layer Reinsurance, Amount Retained, Per Policy Restatement Determination Date Restatement Determination Date Schedule of Changes in Net Unrealized Appreciation (Depreciation) for Investments Unrealized Appreciation Depreciation Of Investments [Table Text Block] Unrealized Appreciation Depreciation Of Investments [Table Text Block] Amounts due to reinsurers Reinsurance Payable Foreign Conflict Foreign Conflict [Member] Foreign Conflict OCI before reclassification Other Comprehensive Income (Loss) before Reclassifications, Tax Shares transferred to affiliated entity (in shares) Investment Owned, Shares, Transferred to Affiliated Entity Investment Owned, Shares, Transferred to Affiliated Entity Legacy Legacy Segment [Member] Legacy Segment U.S. Treasury securities and obligations of U.S. government agencies and corporations U.S. government agencies and corporations US Treasury and Government [Member] Amendment Flag Amendment Flag Loss Reserves Loss Reserves [Member] Loss Reserves Consolidated Entities [Axis] Consolidated Entities [Axis] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Net investment income Net investment income Net Investment Income Unpaid recoverable Reinsurance Recoverables on Unpaid Losses, Allowance Unrealized Depreciation Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Catastrophe Reinsurance, Real Estate Fund Catastrophe Reinsurance, Real Estate Fund [Member] Catastrophe Reinsurance, Real Estate Fund Asset-backed securities Asset-Backed Securities Asset-Backed Securities [Member] Schedule of Aggregate Fair Value and Gross Unrealized Depreciation of Fixed Maturity Securities - Available for Sale, by Contractual Maturity Debt Securities, Available-for-Sale [Table Text Block] Everest International Reinsurance, Ltd. Everest International Reinsurance, Ltd. [Member] Everest International Reinsurance, Ltd. Fixed maturity securities – held to maturity Debt Securities, Held-to-Maturity, Maturity [Abstract] Unsettled securities payable Other Payable to Broker-Dealer and Clearing Organization Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Everest Mexico Everest Mexico [Member] Everest Mexico Consolidated Entities [Domain] Consolidated Entities [Domain] RELATED-PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Ceded losses and LAE Incurred Losses And Loss Adjustment Expenses Ceded, Net Incurred Losses And Loss Adjustment Expenses Ceded, Net Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Entity Address, State or Province Entity Address, State or Province Everest Reinsurance Company (Everest Re) Everest Reinsurance Company (Everest Re) [Member] Everest Reinsurance Company (Everest Re) Total Gross unrealized losses on investments in unrealized loss position Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Cost of equity securities acquired Payments to Acquire Equity Securities, FV-NI Gross Unrealized Depreciation Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent PEO Total Compensation Amount PEO Total Compensation Amount Fixed maturity securities - available for sale Available-for-Sale Securities, Debt Maturities [Abstract] Common stock, par value per share (in dollars per share) Common Stock, Par or Stated Value Per Share Reclassification from Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Member] Additional monthly consideration Renewal Right Agreement, Additional Monthly Consideration Renewal Right Agreement, Additional Monthly Consideration Catastrophic Event [Domain] Catastrophic Event [Domain] Schedule of Related Party Transactions Schedule of Related Party Transactions [Table Text Block] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Premiums receivable Premiums Receivable, Gross Increase (decrease) during the period between the fair value and cost of investments carried at fair value, and deferred taxes thereon: OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax [Abstract] Number of reportable segments Number of Reportable Segments Bermuda Re Bermuda Re [Member] Bermuda Re [Member] Schedule of Fixed Maturities, Allowance for Credit Loss, Available-for-Sale Rollforward Debt Securities, Available-for-Sale, Allowance for Credit Loss [Table Text Block] Prior years Prior Year Claims and Claims Adjustment Expense, Excluding Impact From Retroactive Reinsurance Prior Year Claims and Claims Adjustment Expense, Excluding Impact From Retroactive Reinsurance Due after five years through ten years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Fixed maturities, amortized cost Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss Entity Address, City or Town Entity Address, City or Town Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Fiscal Year Maturity [Abstract] Statement of Financial Position [Abstract] Per Risk And Per Occurrence And Excess Of Loss Reinsurance Per Risk And Per Occurrence And Excess Of Loss Reinsurance [Member] Per Risk And Per Occurrence And Excess Of Loss Reinsurance Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Class of Stock [Axis] Class of Stock [Axis] Realized losses for sale Gross losses from sales Debt Security, Held-To-Maturity, Sold, Realized Loss Debt Security, Held-To-Maturity, Sold, Realized Loss Basis of Accounting Basis of Accounting, Policy [Policy Text Block] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Distributions from other invested assets Proceeds from Equity Method Investment, Distribution, Return of Capital Federal Home Loan Bank Branch [Axis] Federal Home Loan Bank Branch [Axis] Incurred related to: Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract] Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Mt Logan Re Mt Logan Re [Member] Mt. Logan Re [Member] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Fair Value Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Fair Value Everest Assurance - Singapore Branch Everest Assurance - Singapore Branch [Member] Everest Assurance - Singapore Branch Subsequent Event Type [Axis] Subsequent Event Type [Axis] Percentage of principal amount required for redemption (as a percent) Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemable Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemable Concentration Risk Type [Axis] Concentration Risk Type [Axis] Schedule of Long-Term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] OCI before reclassification OCI, before Reclassifications, before Tax, Attributable to Parent Collateral for FHLB borrowings Cash Collateral for Borrowed Securities Investment expenses Investment Income, Investment Expense Adoption of New Accounting Standards and Future Adoption of Recently Issued Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Collateral pledged Financial Instruments, Owned, at Fair Value Purchases, issuances and settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) Use of Estimates Use of Estimates, Policy [Policy Text Block] Related Party [Axis] Related and Nonrelated Parties [Axis] Total other comprehensive income (loss), net of tax Net increase (decrease) during the period Current period change Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Subject loss reserves Subject Loss Reserves Subject Loss Reserves Change in URA(D), pre-tax Other Comprehensive Income (Loss), before Tax Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] Federal Home Loan Bank, Advance, Branch of FHLBank [Line Items] Everest Group, Ltd. Everest Group, Ltd. [Member] Everest Re Group, Ltd. [Member] Interest rate Related Party Transaction, Rate Attritional Losses Attritional Losses [Member] Attritional Losses Due after one year through five years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Document Period End Date Document Period End Date Well-Seasoned Reserves Well-Seasoned Reserves [Member] Well-Seasoned Reserves Other underwriting expenses Other underwriting expenses Other underwriting expenses Other Underwriting Expense Net cash provided by (used in) investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Principal Amounts Original Principal Amount Debt Instrument, Face Amount Due after five years through ten years Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Change in equity adjustments in limited partnerships Increase Decrease In Equity Adjustments In Limited Partnerships Increase Decrease In Equity Adjustments In Limited Partnerships Gross losses from dispositions Debt Securities, Available-for-Sale, Realized Loss Reset quarterly interest rate (as a percent) Debt Instrument, Interest Rate, Effective Percentage Amortized Cost Debt Securities, Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss Gross written premiums Premiums Written, Gross Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Due after ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 Purchase price adjusted (as a percent) Renewal Right Agreement, Purchase Price, Percentage Of Gross Written Premium Equivalent Renewal Right Agreement, Purchase Price, Percentage Of Gross Written Premium Equivalent Payments for coverage Payments for Reinsurance Preferred stock term (in years) Preferred Stock Term Preferred Stock Term Increase (decrease) in amounts due to reinsurers Increase (Decrease) in Reinsurance Payables Preferred shares par value Preferred Stock Par Value Preferred Stock Par Value Everest International - Australia Branch Everest International - Australia Branch [Member] Everest International - Australia Branch Total other comprehensive income (loss) Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Non-cash restructure of fixed maturity securities - available for sale and equity Non-Cash Restructure Of Fixed Maturity Securities, Available-For-Sale, And Equity Non-Cash Restructure Of Fixed Maturity Securities, Available-For-Sale, And Equity Accumulated other comprehensive income (loss), net of deferred income tax expense (benefit) of $50 at 2026 and $(6) at 2025 Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Consolidation Items [Domain] Consolidation Items [Domain] Greater than 12 months Greater than 12 months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Name Outstanding Recovery, Individual Name Baltimore Bridge Collapse Baltimore Bridge Collapse [Member] Baltimore Bridge Collapse Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus 3.5% Senior notes Senior Notes 3.50% [Member] Senior Notes 3.50% [Member] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Total liabilities Liabilities Voting and Variable Interest Entities Consolidation, Variable Interest Entity, Policy [Policy Text Block] Admitted assets for FHLB Federal Home Loan Bank Advances General Debt Obligations Disclosures Admitted Assets Federal Home Loan Bank Advances General Debt Obligations Disclosures Admitted Assets Fixed maturities - available for sale, at fair value (amortized cost: 2026, $21,451; 2025, $21,032; credit allowances: 2026, $(64); 2025, $(68)) Fair Value Fair value Debt Securities, Available-for-Sale, Excluding Accrued Interest Segment, Geographical [Domain] Geographical [Domain] Gross gains from sales Debt Security, Held-To-Maturity, Sold, Realized Gain Debt Security, Held-To-Maturity, Sold, Realized Gain Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Company Selected Measure Name Company Selected Measure Name Total gains or (losses) (realized/unrealized) Included in other comprehensive income (loss) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Cost of fixed maturities acquired - available for sale Payments to Acquire Debt Securities, Available-for-Sale Reclassification of net realized losses (gains) included in net income (loss) Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Lloyd’s Syndicate 2786 Lloyd’s Syndicate 2786 [Member] Lloyd’s Syndicate 2786 Income Tax Disclosure [Abstract] Cash And Fixed Maturity Securities Cash And Fixed Maturity Securities [Member] Cash And Fixed Maturity Securities Reclassification of net realized losses (gains) included in net income (loss) Reclassification from AOCI, Current Period, before Tax, Attributable to Parent Due in one year or less Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Change in URA(D), net of deferred taxes, included in stockholders' equity OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax 4.868% Senior notes Senior Notes 4.868% [Member] Senior Notes 4.868% [Member] Due after one year through five years Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five NON-CASH TRANSACTIONS Noncash Investing and Financing Items [Abstract] Cost of other invested assets acquired Payments to Acquire Interest in Subsidiaries and Affiliates Benefit plan net gain (loss) Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Retroactive reinsurance adjustment Policyholder Benefits and Claims Incurred, Retroactive Reinsurance Adjustment Policyholder Benefits and Claims Incurred, Retroactive Reinsurance Adjustment Annual coverage fee Reinsurance, Annual Coverage Fee Reinsurance, Annual Coverage Fee Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Asset Types [Domain] Asset Class [Domain] Reserve for losses and loss adjustment expenses Gross reserves beginning of period Gross reserves end of period Liability for Claims and Claims Adjustment Expense Related Party Transactions [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Gross investment income Investment Income, Interest and Dividend Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Unrealized Depreciation Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss Short-term investments Other Short Term Investments Cost Other Short Term Investments Cost Ceded loss reserves Policyholder Benefits and Claims Incurred, Retroactive Reinsurance Adjustment, Ceded Loss Reserves Policyholder Benefits and Claims Incurred, Retroactive Reinsurance Adjustment, Ceded Loss Reserves Maximum exposure to loss Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Revenue from Contract with Customer [Abstract] Reinsurance agreement Reinsurance, Excess Retention, Amount Reinsured, Per Event Schedule of Activity Under Level 3, Fair Value Measurements Using Significant Unobservable Inputs for Fixed Maturities - Available for Sale Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Accrued investment income Accrued Investment Income Receivable Change in other assets and liabilities, net Increase (Decrease) in Other Operating Assets and Liabilities, Net Award Timing Predetermined Award Timing Predetermined [Flag] 4.30% Long-term Note Long-Term Note, 4.30% [Member] Long-Term Note, 4.30% Underwriting gain (loss) Underwriting Income (Loss) Schedule of Components of Comprehensive Income (Loss) in the Consolidated Statements of Operations Comprehensive Income (Loss) [Table Text Block] Reinsurance loss recoverables (net of credit allowances: 2026, $(51); 2025, $(48)) Reinsurance Recoverable for Paid Claims and Claims Adjustments Debt Securities, Available-for-Sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Severance costs Severance Costs Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Incurred losses and loss adjustment expenses Incurred losses and LAE Policyholder Benefits and Claims Incurred, Net Quoted Prices in Active Markets for Identical Assets (Level 1) Fair Value, Inputs, Level 1 [Member] Expenses incurred Expenses Incurred By Company From Services Provided By Affiliates Expenses Incurred By Company From Services Provided By Affiliates Organization, Consolidation and Presentation of Financial Statements [Abstract] Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Ceded losses and LAE Ceded Losses And Loss Adjustment Expenses Ceded Losses And Loss Adjustment Expenses Amortized Cost Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date Non-agency commercial Commercial Mortgage Backed Securities Issued By Private Enterprises [Member] Commercial Mortgage Backed Securities Issued By Private Enterprises All Executive Categories All Executive Categories [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Distribution of limited partnership income Reimbursement from Limited Partnership Investment Net of Tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Schedule of Federal Home Loan Bank Advances, by Branch of FHLB Bank [Table] Federal Home Loan Bank, Advance, Branch of FHLBank [Table] Agency residential Residential Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] Residential Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise Losses ceded Policyholder Benefits and Claims Incurred, Ceded Scenario [Domain] Scenario [Domain] Interest, fees and bond issue cost amortization expense Interest, Fee And Bond Issue Cost Amortization Expense Interest, Fee And Bond Issue Cost Amortization Expense Federal Home Loan Bank Branch [Domain] Federal Home Loan Bank Branch [Domain] Securities on deposit with or regulated by government authorities Deposits with Clearing Organizations and Others, Securities Commission, brokerage, taxes and fees Commission and brokerage Selling and Marketing Expense Concentration Risk Type [Domain] Concentration Risk Type [Domain] Paid related to: Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract] Due in one year or less Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One Decrease (increase) in income taxes Increase (Decrease) in Income Taxes Receivable Fair Value Disclosures [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] SEGMENT REPORTING Segment Reporting [Text Block] INVESTMENTS Investment in Debt and Equity Securities and Other Trading Assets [Text Block] Proceeds from fixed maturities matured/called/repaid - 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available for sale Proceeds from sales of fixed maturity securities - available for sale Proceeds from Sale of Debt Securities, Available-for-Sale SENIOR NOTES Debt Disclosure [Text Block] Prior years Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years Accrued interest on debt and borrowings Interest Payable Scenario [Axis] Scenario [Axis] Amount of borrowed funds required to be used to acquire additional membership stock, percentage Federal Home Loan Bank Advances Required To Be Used To Acquire Additional Membership Stock Percentage Federal Home Loan Bank Advances Required To Be Used To Acquire Additional Membership Stock Percentage Current year incurred losses Liability for Unpaid Claims and Claims Adjustment Expense, Period Increase (Decrease) Schedule of Interest Expense Incurred in Connection with Long-Term Subordinated Notes Schedule Of Interest Expense On Long Term Subordinated Notes [Table Text Block] Interest expense incurred in connection with these long term subordinated notes. 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Trading Arrangement Adoption Date Deferred gain Deferred Gain On Sale Current Deferred Gain On Sale Current Counterparty Name [Domain] Counterparty Name [Domain] Stated rate (as a percent) Debt instrument, stated interest rate (as a percent) Debt Instrument, Interest Rate, Stated Percentage Premium receivable, net of credit allowances Premium Receivable, Allowance for Credit Loss Total shareholders' equity Beginning balance Ending balance Equity, Attributable to Parent ASSETS: Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Everest Canada Everest Canada [Member] Everest Canada Insider Trading Policies and Procedures [Line Items] Fixed maturities - held to maturity, at amortized cost, fair value Fair Value Debt Securities, Held-to-Maturity, Fair Value Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Credit allowance on fixed maturity securities Investments, Allowance For (Reversal Of) Credit Loss Investments, Allowance For (Reversal Of) Credit Loss Current year Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year Total incurred losses and LAE Aggregate loss Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims Reinsurance Period [Domain] Reinsurance Period [Domain] Reinsurance Period [Domain] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Entity Central Index Key Entity Central Index Key All Adjustments to Compensation All Adjustments to Compensation [Member] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Net cash provided by (used in) operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Prior year incurred unfavorable (favorable) development Prior Year Claims and Claims Adjustment Expense Other Other Credit Derivatives [Member] Income Statement [Abstract] STOCKHOLDER'S EQUITY: Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Total net gains (losses) on investments Net (gains) losses on investments Net gains (losses) on investments Net gains (losses) on investments Other net gains (losses) on investments Gain (Loss) on Investments Annual dividend rate (as a percent) Annual dividend rate Preferred Stock, Dividend Rate, Percentage Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] Fixed maturities Fixed maturities Fixed Maturities [Member] CLAIMS AND EXPENSES: Operating Expenses [Abstract] Income tax asset Deferred Income Tax Assets, Net Foreign corporate securities Foreign Corporate Debt Security, Corporate, Non-US [Member] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Catastrophe Reinsurance Catastrophe Reinsurance [Member] Catastrophe Reinsurance [Member] Change in paid in capital Proceeds from (Repurchase of) Equity Less reinsurance recoverables on unpaid losses Plus reinsurance recoverables on unpaid losses Reinsurance Recoverables, Including Reinsurance Premium Paid Interest basis spread, reset quarterly Debt Instrument, Basis Spread on Variable Rate City Area Code City Area Code ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS), NET OF DEFERRED INCOME TAXES: Accumulated Other Comprehensive Income (Loss), Net of Deferred Income Taxes AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] SUBSEQUENT EVENTS Subsequent Events [Text Block] Fair Value Debt Instrument, Fair Value Disclosure Catastrohpe Reinsurance, All Remaining Lines Of Property And Casualty Business Catastrohpe Reinsurance, All Remaining Lines Of Property And Casualty Business [Member] Catastrohpe Reinsurance, All Remaining Lines Of Property And Casualty Business Name Forgone Recovery, Individual Name Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Schedule of Components of Net Gains (Losses) on Investments Realized Gain (Loss) on Investments [Table Text Block] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Statement [Line Items] Statement [Line Items] TOTAL ASSETS Assets Everest Reinsurance Holdings, Inc Everest Reinsurance Holdings, Inc [Member] Everest Reinsurance Holdings, Inc Entity [Domain] Entity [Domain] Interest, fees and bond issue cost amortization expense Interest Expense, Operating Net investment income Investment Income, Net Reclassification adjustment for amortization of net (gain) loss included in net income (loss) Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax Coverage Period, 2003 Through 2017 Coverage Period, 2003 Through 2017 [Member] Coverage Period, 2003 Through 2017 Variable Interest Entity, Not Primary Beneficiary Variable Interest Entity, Not Primary Beneficiary [Member] Before Tax Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract] Assets Sold under Agreements to Repurchase [Line Items] Assets Sold under Agreements to Repurchase [Line Items] Operating Segments Operating Segments [Member] Due after ten years Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 10 Total benefit plan net gain (loss) for the period Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent Reduction in allowance due to disposals Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Sold Schedule of Assets Sold under Agreements to Repurchase [Table] Asset Sold under Agreement to Repurchase [Table] Unrealized Appreciation Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Net change in short-term investments Payments for (Proceeds from) Short-Term Investments OCI before reclassifications OCI, before Reclassifications, Net of Tax, Attributable to Parent Reserves For Losses And LAE [Line Items] Reserves For Losses And LAE [Line Items] Reserves For Losses And LAE [Line Items] GENERAL Nature of Operations [Text Block] PEO PEO [Member] Cash surrender value of life insurance Cash Surrender Value of Life Insurance Aggregate purchase price, not to exceed Revenue, Remaining Performance Obligation, Variable Consideration, Maximum Contingent Reimbursement If Threshold Not Met Revenue, Remaining Performance Obligation, Variable Consideration, Maximum Contingent Reimbursement If Threshold Not Met Total investments and cash Investments and Cash Due after five years through ten years Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 5 through 10 Measurement Basis [Axis] Measurement Basis [Axis] Reinsurer, Name [Domain] Reinsurer, Name [Domain] Gross losses from dispositions Equity Securities, FV-NI, Realized Loss Ireland Insurance Ireland Insurance [Member] Ireland Insurance Earthquake Earthquake [Member] Maximum percentage of admitted assets allowed for borrowing base Federal Home Loan Bank Advances General Debt Obligations Disclosures Maximum Percentage Of Admitted Assets Allowed For Borrowing Base Federal Home Loan Bank Advances General Debt Obligations Disclosures Maximum Percentage Of Admitted Assets Allowed For Borrowing Base Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Participation shares (in percent) Reinsurance, Stop Loss Agreement, Participation Percentage Reinsurance, Stop Loss Agreement, Participation Percentage Due in one year or less Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Subsequent Event Type [Domain] Subsequent Event Type [Domain] Right to defer interest on one or more occasions for up to number of consecutive years Debt Instrument Periodic Payment Interest Right Of Deferment Number Of Years Debt Instrument Periodic Payment Interest Right Of Deferment Number Of Years RETAINED EARNINGS: Retained Earnings [Member] Reinsurance agreement, threshold Reinsurance, Amount Retained, Per Event URA(D) of securities AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Aggregate renewed premiums (as a percent) Renewal Right Agreement, Gross Written Premium Paid And Payable, Aggregate Renewed Premiums, Threshold Renewal Right Agreement, Gross Written Premium Paid And Payable, Aggregate Renewed Premiums, Threshold Software, In-Development, Internally Developed, and Purchased Software, In-Development, Internally Developed, and Purchased [Member] Fair Value Fair Value Measurement, Policy [Policy Text Block] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Collateral in trust for non-affiliated agreements Asset, Held-in-Trust Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Unrealized appreciation (depreciation) ("URA(D)") of securities arising during the period OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Common shares, outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Foreign currency translation adjustments Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Issuer Concentration Risk Issuer Concentration Risk [Member] Issuer [Member] Schedule of Fair Value Measurement Levels for all Assets, Recorded at Fair Value Fair Value, by Balance Sheet Grouping [Table Text Block] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Current Reporting Status Entity Current Reporting Status Net cash provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Gains (losses) from fair value adjustments: Unrealized Gain (Loss) on Investments Everest Colombia Everest Colombia [Member] Everest Colombia Reduction in allowance due to disposals Debt Securities, Held-To-Maturity, Excluding Accrued Interest, Allowance for Credit Loss, Securities Sold Debt Securities, Held-To-Maturity, Excluding Accrued Interest, Allowance for Credit Loss, Securities Sold Due in five years through ten years Due In Five Years Through Ten Years [Member] Due In Five Years Through Ten Years [Member] Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Reinsurer, Name [Axis] Reinsurer, Name [Axis] Net written premiums Premiums Written, Net Reclassification of net realized losses (gains) included in net income (loss) Reclassification from AOCI, Current Period, Tax CASH FLOWS FROM FINANCING ACTIVITIES: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Schedule of Restricted Assets Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block] Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Table] Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Table] Collateralized Reinsurance And Trust Agreements [Abstract] Reinsurance And Trust Agreements [Abstract] Schedule of Components of Net Investment Income Investment [Table Text Block] Major Types of Debt and Equity Securities [Domain] Financial Instruments [Domain] Other Comprehensive Income (Loss), Tax [Abstract] Decrease (increase) in prepaid reinsurance premiums Increase (Decrease) in Prepaid Reinsurance Premiums Prepaid reinsurance premiums Prepaid Reinsurance Premiums Held to maturity with net carrying value Debt Securities, Held-to-Maturity, Sale Intangible Asset, Finite-Lived, Class [Axis] Intangible Asset, Finite-Lived, Class [Axis] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Fair Value Estimate of Fair Value Measurement [Member] Lumpsum annuities ( in percent) Reinsurance, Excess Retention, Percentage Credit losses on securities where credit losses were not previously recorded Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Not Previously Recorded Cash Cash Assumed written premiums Assumed Premiums Written Everest Insurance Ireland Everest Insurance Ireland [Member] Everest Insurance Ireland Segment Reporting [Table] Segment Reporting [Table] Observable input constant maturity (in years) Observable Input, Constant Maturity Term Observable Input, Constant Maturity Term Fixed maturity securities - available for sale, held to maturity and short-term investments OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Table] Shares received in exchange from affiliated entity for transfer (in shares) Investment Owned, Shares, Shares Received in Exchange from Affiliated Entity for Transfer Investment Owned, Shares, Shares Received in Exchange from Affiliated Entity for Transfer Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Less than 12 months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Aggregate purchase price Revenue, Remaining Performance Obligation, Amount Current Fiscal Year End Date Current Fiscal Year End Date Reinsurance Contract [Axis] Reinsurance Contract [Axis] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Related Party Transaction [Domain] Related Party Transaction [Domain] Issuer [Domain] Issuer [Domain] Issuer [Domain] Fair Value Notes Payable, Fair Value Disclosure Whole Account Quota Share Reinsurance Whole Account Quota Share Reinsurance [Member] Whole Account Quota Share Reinsurance Foreign government securities Debt Security, Government, Non-US [Member] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Schedule of Amortized Cost and Fair Value of Fixed Maturity Securities, by Contractual Maturity Investments Classified by Contractual Maturity Date [Table Text Block] Equity securities Equity securities Equity Securities [Member] Ireland Re Ireland Re [Member] Ireland Re [Member] Schedule of Activity in the Reserve for Losses and Loss Adjustment Expenses (“LAE”) Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block] Number of reportable segments that sell products Number Of Reportable Segments That Sell Products Number Of Reportable Segments That Sell Products Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Senior notes Consolidated Balance Sheet Amount Senior Notes Common shares, issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Beginning balance of fixed maturities Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Due in one year or less Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Year One Amortization of bond premium (accrual of bond discount) Amortization of Debt Discount (Premium) Premiums earned Premiums earned Premiums Earned, Net Investments, Debt Securities Benchmark Investments, Debt Securities Benchmark [Member] Investments, Debt Securities Benchmark Accumulated other comprehensive income (loss), net deferred income tax expense (benefit) AOCI Tax, Attributable to Parent Amount of transfer Loss Portfolio Transfer Amount Of Transfer Loss Portfolio Transfer Amount Of Transfer Greater than 12 months Unrealized losses related to fixed maturity securities for more than one year Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss OTHER COMPREHENSIVE INCOME (LOSS) Comprehensive Income (Loss) Note [Text Block] Equity Components [Axis] Equity Components [Axis] Funds held under reinsurance treaties Funds Held under Reinsurance Agreements, Liability Product and Service [Domain] Product and Service [Domain] FEDERAL HOME LOAN BANK MEMBERSHIP Federal Home Loan Bank Advances, Disclosure [Text Block] Income taxes paid (recovered) Income Tax Paid, after Refund Received Due after one year through five years Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year One through Five Coverage Period, 2002 Through 2017 Coverage Period, 2002 Through 2017 [Member] Coverage Period, 2002 Through 2017 Entity Interactive Data Current Entity Interactive Data Current Effects of Reinsurance [Line Items] Effects of Reinsurance [Line Items] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Due after one year through five years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five Less: reclassification adjustment for realized losses (gains) included in net income (loss) Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Entity Small Business Entity Small Business Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] COMPREHENSIVE INCOME (LOSS) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Unearned premium reserve Unearned Premiums Termination Date Trading Arrangement Termination Date 3.125% Senior notes Senior Notes 3.125% [Member] Senior Notes 3.125% [Member] Gross gains from dispositions Equity Securities, FV-NI, Realized Gain Everest Chile Everest Chile [Member] Everest Chile Subsequent Events [Abstract] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Current year Current Year Claims and Claims Adjustment Expense Decreases in allowance on previously impaired securities Debt Securities, Available-For-Sale, Excluding Accrued Interest, Allowance For Credit Loss, Not To Sell Before Recovery, Credit Loss, Previously Recorded, Reversal Debt Securities, Available-For-Sale, Excluding Accrued Interest, Allowance For Credit Loss, Not To Sell Before Recovery, Credit Loss, Previously Recorded, Reversal Document Type Document Type Increases in allowance on previously impaired securities Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Not To Sell Before Recovery, Credit Loss, Previously Recorded, Expense Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Not To Sell Before Recovery, Credit Loss, Previously Recorded, Expense Due after ten years Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Transfers in/(out) of Level 3 and reclassification of securities in/(out) of investment categories Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net Fair Value as of Grant Date Award Grant Date Fair Value Loss recognized upon settlement Loss Portfolio Transfer, Loss Recognized Upon Settlement Loss Portfolio Transfer, Loss Recognized Upon Settlement Schedule of Aggregate Fair Value and Gross Unrealized Depreciation of Fixed Maturity Securities - Available for Sale, by Security Type Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Fixed maturities, credit allowances Allowance for Credit Losses Beginning balance Balance, end of period Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest Total net realized gains (losses) from dispositions Total net realized gains (losses) from dispositions Gain (Loss) on Disposition of Assets Non-agency residential Residential Mortgage Backed Securities Issued By Private Enterprises [Member] Residential Mortgage Backed Securities Issued By Private Enterprises Schedule of Outstanding Fixed to Floating Rate Long-Term Subordinated Notes Schedule of Subordinated Borrowing [Table Text Block] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Issuer One Issuer One [Member] Issuer One Arrangement Duration Trading Arrangement Duration Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Credit losses on securities where credit losses were not previously recorded Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Not Previously Recorded Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Not Previously Recorded Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Less than 12 months Unrealized losses related to fixed maturity securities for less than one year Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Total other comprehensive income (loss) Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent INCOME (LOSS) BEFORE TAXES Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Commitments and Contingencies (Note 12) Commitments and Contingencies Total revenues Revenues Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Maximum amount available under FHLB Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available Counterparty Name [Axis] Counterparty Name [Axis] Intangible Asset, Finite-Lived, Class [Domain] Intangible Asset, Finite-Lived, Class [Domain] Funds held by reinsureds Funds held by reinsureds Funds Held under Reinsurance Agreements, Asset All Award Types Award Type [Domain] Hurricanes, Typhoons, Cyclones And Other Weather Related Events Hurricanes, Typhoons, Cyclones And Other Weather Related Events [Member] Hurricanes, Typhoons, Cyclones And Other Weather Related Events Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount FAIR VALUE Fair Value Disclosures [Text Block] Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Amortized Cost Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date [Abstract] Agency commercial Commercial Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] Commercial Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise SUPPLEMENTAL CASH FLOW INFORMATION: Supplemental Cash Flow Information [Abstract] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] PEO Name PEO Name Increase (decrease) in losses in course of payment Increase Decrease In Losses In Course Of Payment Increase Decrease In Losses In Course Of Payment Geographical [Axis] Geographical [Axis] Total paid losses and LAE Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid Restricted cash Restricted Cash Debt Securities, Available-for-Sale, Allowance for Credit Loss [Line Items] Debt Securities, Available-for-Sale, Allowance for Credit Loss [Line Items] Fixed maturities - held to maturity, at amortized cost, net of credit allowances Allowance for Credit Losses Beginning balance Balance, end of period Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest Other assets (net of credit allowances: 2026, $(17); 2025, $(17)) Other Assets Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Dividends received on preferred stock of affiliate Dividends Received On Common Shares, Reported As Net Investment Income In Consolidated Statements Of Operations And Comprehensive Income (Loss) Dividends received on common shares, reported as net investment income in consolidated statements of operations and comprehensive income (loss). Entity Tax Identification Number Entity Tax Identification Number Legal Entity [Axis] Legal Entity [Axis] Interest expense incurred Interest expense Interest Expense, Debt Consolidated Balance Sheet Amount Notes Payable Dividends from preferred shares of affiliate Dividends From Preferred Shares Of Affiliate [Member] Dividends From Preferred Shares Of Affiliate [Member] Cash, beginning of period Cash, end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Effects of Reinsurance [Table] Effects of Reinsurance [Table] Investment Grade External Credit Rating, Investment Grade [Member] Schedule of Reclassification from Accumulated Other Comprehensive Income (Loss) Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Losses in course of payment Losses in Course of Payment Losses in Course of Payment Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Decreases in allowance on previously impaired securities Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Not To Sell Before Recovery, Credit Loss, Previously Recorded, Reversal Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Not To Sell Before Recovery, Credit Loss, Previously Recorded, Reversal Debt Instrument [Axis] Debt Instrument [Axis] Non-cash compensation expense Share-Based Payment Arrangement, Noncash Expense State National Reinsurer State National Reinsurer [Member] State National Reinsurer Amount transferred Related Party Transaction, Amounts of Transaction Proceeds from fixed maturities matured/called/repaid - held to maturity Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Due after five years through ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Mortgage-backed securities Collateralized Mortgage-Backed Securities [Member] Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Funds held under reinsurance agreement, excess of liability Reinsurance, Excess Retention, Amount Reinsured, Per Policy Reinsurance paid loss recoverables, net of credit allowances Reinsurance Recoverables on Paid Losses, Allowance Award Type Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Due in one year or less Due In One Year Or Less [Member] Due In One Year Or Less [Member] Coverage Period, 2004 Through 2009 Coverage Period, 2004 Through 2009 [Member] Coverage Period, 2004 Through 2009 Total URA(D) of securities arising during the period Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Retained earnings Retained Earnings (Accumulated Deficit) Due in one year through five years Due In One Year Through Five Years [Member] Due in One Year Through Five Years [Member] Senior Notes [Abstract] Product and Service [Axis] Product and Service [Axis] Equity securities, at fair value Equity securities, fair value Equity Securities, FV-NI Net change in unsettled securities transactions Net Change In Unsettled Securities Transactions Net change in unsettled securities transactions Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] COMMON STOCK Common Stock [Member] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Other assets, net of credit allowances Other Assets, Allowance For Credit Loss Other Assets, Allowance For Credit Loss Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Insurance [Abstract] Increases in allowance on previously impaired securities Debt Securities, Available-For-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Not To Sell Before Recovery, Credit Loss, Previously Recorded, Expense Debt Securities, Available-For-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Not To Sell Before Recovery, Credit Loss, Previously Recorded, Expense Additional contractual commitments Additional Contractual Commitments Additional Contractual Commitments Concentration credit risk, less than Concentration Risk, Percentage Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Proceeds from fixed maturities sold - held to maturity Proceeds from sales of fixed maturity securities - held to maturity Proceeds from Sale of Held-to-Maturity Securities Equity Awards Adjustments Equity Awards Adjustments [Member] Issuer [Axis] Issuer [Axis] Issuer Decrease (increase) in funds held by reinsureds, net Increase (Decrease) in Funds Held under Reinsurance Agreements Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Assumed premiums earned Assumed Premiums Earned Reinsurance Period [Axis] Reinsurance Period [Axis] Reinsurance Period [Axis] TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities and Equity Net realized gains (losses) from dispositions: Realized Investment Gains (Losses) Employee Stock Option Share-Based Payment Arrangement, Option [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Asset Class [Axis] Asset Class [Axis] Related Party [Domain] Related and Nonrelated Parties [Domain] No Trading Symbol No Trading Symbol Flag Decrease (increase) in premiums receivable Increase (Decrease) in Premiums Receivable Tabular List, Table Tabular List [Table Text Block] URA(D) of securities AOCI, Gain (Loss), Debt Securities, Available-for-Sale, with Allowance for Credit Loss, Parent [Member] Additional paid-in capital Additional Paid in Capital Total reinsurance recoverable on unpaid claims Reinsurance Recoverable for Unpaid Claims and Claims Adjustments Annapurna Annapurna [Member] Annapurna Prior years, impact from retroactive reinsurance Prior Year Claims and Claims Adjustment Expense, Impact From Retroactive Reinsurance And Claims Adjustment Expense, Incurred Claims Prior Year Claims and Claims Adjustment Expense, Impact From Retroactive Reinsurance And Claims Adjustment Expense, Incurred Claims Schedule of Amortized Cost, Allowance for Credit Losses, Gross Unrealized Appreciation/(Depreciation) and Fair Value of Fixed Maturity Securities Unrealized Gain (Loss) on Investments [Table Text Block] Decrease (increase) in reinsurance recoverables Increase (Decrease) in Reinsurance Recoverable Schedule of Interest Expense Incurred in Connection with Senior Notes Schedule Of Interest Expense [Table Text Block] Schedule Of Interest Expense [Table Text Block] RESERVE FOR LOSSES AND LAE Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block] Cost of fixed maturities acquired - held to maturity Payments to Acquire Held-to-Maturity Securities American International Group, Inc. American International Group, Inc. [Member] American International Group, Inc. LONG-TERM SUBORDINATED NOTES Long-Term Debt [Text Block] Short-term investments Short-Term Investments [Member] Other income (expense) Other income (expense) Other Operating Income (Expense), Net Name Awards Close in Time to MNPI Disclosures, Individual Name Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Limit Ceded written premiums Ceded written premiums Ceded Premiums Written Corporate expenses Corporate expenses General and Administrative Expense Notes payable, affiliated Other Notes Payable Limited partnerships Limited Partnerships [Member] Limited Partnerships [Member] Schedule of Gross Gains (Losses) from Dispositions of Fixed Maturity and Equity Securities Schedule of Realized Gain (Loss) [Table Text Block] United States, United Kingdom, And Asia Pacific United States, United Kingdom, And Asia Pacific [Member] United States, United Kingdom, And Asia Pacific Global Wholesale & Specialty Insurance Segment [Member] Insurance [Member]. Assumed losses and LAE Incurred Losses And Loss Adjustment Expenses Assumed, Net Incurred Losses And Loss Adjustment Expenses Assumed, Net Higher Premiums Earned Higher Premiums Earned [Member] Higher Premiums Earned Adjustment to Compensation: Adjustment to Compensation [Axis] Commercial Commercial Mortgage-Backed Securities [Member] Weighted average percentage Whole Account Quota Share Reinsurance Agreement, Percentage Whole Account Quota Share Reinsurance Agreement, Percentage Class of Stock [Domain] Class of Stock [Domain] Foreign exchange/translation adjustment Translation Adjustment Functional to Reporting Currency, Net of Tax, Period Increase (Decrease) Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount No Recorded Allowance for Credit Losses No Recorded Allowance for Credit Losses [Member] No Recorded Allowance for Credit Losses [Member] Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Catastrophe Losses, WildFires Catastrophe Losses, Wildfires [Member] Catastrophe Losses, Wildfires Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Name Measure Name Schedule of Fixed Maturities, Allowance for Credit Loss, Held-to-Maturity Rollforward Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Table Text Block] Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] INCOME TAXES Income Tax Disclosure [Text Block] Pay vs Performance Disclosure [Line Items] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Number of investments held as primary beneficiary Number Of Investments Held As Primary Beneficiary Number Of Investments Held As Primary Beneficiary Due after ten years Due After Ten Years [Member] Due After Ten Years [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Net reserves beginning of period Net reserves end of period Reserve For Losses And Loss Adjustment Expenses Net Reserve For Losses And Loss Adjustment Expenses Net Proceeds from equity securities sold Proceeds from sales of equity securities Proceeds from Sale of Equity Securities, FV-NI Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Debt Securities, Available-for-Sale, Allowance for Credit Loss [Table] Debt Securities, Available-for-Sale, Allowance for Credit Loss [Table] Increase (decrease) in reserve for losses and loss adjustment expenses Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve ADDITIONAL PAID-IN CAPITAL: Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Total Fair value of investments in unrealized loss position Debt Securities, Available-for-Sale, Unrealized Loss Position COLLATERALIZED REINSURANCE, TRUST AGREEMENTS AND OTHER RESTRICTED ASSETS Restricted Assets Disclosure [Text Block] Name Trading Arrangement, Individual Name Issuer Two, Less Than Issuer Two [Member] Issuer Two Securities where an allowance for credit loss was recorded Recorded An Allowance For Credit Losses [Member] Recorded An Allowance For Credit Losses [Member] Interest expense incurred Interest Expense, Subordinated Notes and Debentures BASIS OF PRESENTATION Basis of Accounting [Text Block] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Company Selected Measure Amount Company Selected Measure Amount Schedule of Underwriting Results for Operating Segments Segment Reporting, Reconciliation of Profit (Loss) by Segment to Consolidated [Table Text Block] Investments, Debt and Equity Securities [Abstract] Adverse development coverage Adverse Development Coverage Adverse Development Coverage The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) Other invested assets Other Invested Assets [Member] Other Invested Assets [Member] Non-PEO NEO Non-PEO NEO [Member] Senior Notes Senior Notes [Member] Entity Address, Address Line One Entity Address, Address Line One Impairments of capitalized software Intangible Asset, Finite-Lived, Impairment Loss Total claims and expenses Benefits, Losses and Expenses Funds held interest income (expense) Funds Held Interest Income Expense Funds Held Interest Income Expense Fair Value Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Fair Value [Abstract] Corporate securities Corporate Securities Debt Security, Corporate, US [Member] Income tax expense (benefit) Income tax expense (benefit) Income Tax Expense (Benefit) SALE OF RENEWAL RIGHTS Other Operating Income and Expense [Text Block] Total restricted assets Restricted Cash and Investments Award Timing Method Award Timing Method [Text Block] Consolidation Consolidation, Policy [Policy Text Block] Net change in cash balances Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forecast Forecast [Member] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Premiums receivable (net of credit allowances: 2026, $(50); 2025, $(49)) Premiums Receivable, Net AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] NET INCOME (LOSS) Net income (loss) Net Income (Loss) Attributable to Parent Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Investments Investments [Member] Statement [Table] Statement [Table] Affiliated Cession to Bermuda Entities Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] Catastrophic Event [Axis] Catastrophic Event [Axis] Redeemable Convertible Preferred Stock Redeemable Convertible Preferred Stock [Member] Restatement Determination Date: Restatement Determination Date [Axis] Schedule of Components of Accumulated Other Comprehensive Income (Loss), Net of Tax, in the Consolidated Balance Sheets Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Reinsurance Treaty Reinsurance Segment [Member] Reinsurance [Member] Debt Securities, Held-to-Maturity, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] Debt Securities, Held-to-Maturity, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] Kilimanjaro Re Limited Kilimanjaro Re Limited [Member] Kilimanjaro Re Limited [Member] REVENUES: Revenues [Abstract] Catastrophe Losses Catastrophe Losses [Member] Catastrophe Losses Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]