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Investment Owned, Shares, Shares Received in Exchange from Affiliated Entity for Transfer

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Investment Owned, Shares, Transferred to Affiliated Entity

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Loss Portfolio Transfer Amount Of Transfer

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Preferred Stock Par Value

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Reinsurance, Stop Loss Agreement, Term

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Subject Loss Reserves

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Whole Account Quota Share Reinsurance Agreement, Percentage

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The percentage rate used to calculate dividend payments on preferred stock.

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- Definition

Amount, after valuation allowance, recoverable under reinsurance contracts for losses reported to the ceding insurer but not yet paid and amounts expected for incurred losses and settlement expenses, which have not yet been reported to the ceding insurer.

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Amount, after valuation allowance, recoverable under reinsurance contracts for losses reported to and paid by the ceding insurer.

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- Definition

Amount per event of risk undertaken originally by insurer that is not ceded to reinsurer.

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Amount per event of risk ceded to reinsurer in excess of risk undertaken originally by insurer that is not ceded to reinsurer.

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- Definition

Amount of transactions with related party during the financial reporting period.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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RELATED-PARTY TRANSACTIONS - Narrative (Details) € in Millions, £ in Millions, $ in Millions, $ in Millions				1 Months Ended		3 Months Ended	5 Months Ended		6 Months Ended			7 Months Ended	10 Months Ended	12 Months Ended		15 Months Ended	72 Months Ended	132 Months Ended	192 Months Ended
	Dec. 31, 2017 USD ($)	Jan. 01, 2016	Oct. 01, 2008 USD ($)	Aug. 12, 2025 USD ($)	Dec. 31, 2015 USD ($) shares	Jun. 30, 2025 USD ($)	Jun. 30, 2025 EUR (€)	Jun. 30, 2025 AUD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2025 EUR (€)	Jun. 30, 2025 GBP (£)	Dec. 31, 2024 USD ($)	Jan. 31, 2024 EUR (€)	Jun. 30, 2025 USD ($)	Jun. 30, 2023	Jun. 30, 2025 USD ($)	Dec. 31, 2009	Dec. 31, 2017	Dec. 31, 2017
Related Party Transaction [Line Items]
Shares received in exchange from affiliated entity for transfer (in shares) \| shares					1,773.214
Preferred shares par value					$ 1.0
Annual dividend rate					1.75%
Shares transferred to affiliated entity (in shares) \| shares					9,719,971
Bermuda Re
Related Party Transaction [Line Items]
Amount of Transfer			$ 747.0
Reinsurance recoverables						$ 20.0			$ 20.0			$ 27.0		$ 20.0		$ 20.0
Subject loss reserves	$ 2,300.0
Bermuda Re \| Cash And Fixed Maturity Securities
Related Party Transaction [Line Items]
Amount transferred	1,000.0
Bermuda Re \| Loss Reserves
Related Party Transaction [Line Items]
Amount transferred	970.0
Affiliated Entity
Related Party Transaction [Line Items]
Reinsurance recoverables						974.0			$ 974.0			1,302.0		974.0		974.0
Affiliated Entity \| Bermuda Re
Related Party Transaction [Line Items]
Aggregate stop loss reinsurance contract (in months)									12 months	12 months	12 months
Share reinsurance percentage		100.00%
Reinsurance recoverables						187.0			$ 187.0			$ 381.0		187.0		187.0
Adverse development coverage	$ 500.0
Affiliated Entity \| Bermuda Re \| Catastrophe Reinsurance
Related Party Transaction [Line Items]
Reinsurance, excess retention, amount reinsured, per event									600.0		£ 130
Reinsurance agreement, threshold \| £											27
Annual coverage fee									120.0		£ 7
Affiliated Entity \| Bermuda Re \| Catastrophe Reinsurance \| Subsequent Events
Related Party Transaction [Line Items]
Reinsurance, excess retention, amount reinsured, per event				$ 500.0
Affiliated Entity \| Bermuda Re \| Catastrophe Reinsurance \| Reinsurance Contract [Axis]: Earthquake Events
Related Party Transaction [Line Items]
Reinsurance agreement, threshold									1,100.0
Affiliated Entity \| Bermuda Re \| Catastrophe Reinsurance \| Reinsurance Contract [Axis]: Earthquake Events \| Subsequent Events
Related Party Transaction [Line Items]
Reinsurance agreement, threshold				1,100.0
Affiliated Entity \| Bermuda Re \| Catastrophe Reinsurance \| Reinsurance Contract [Axis]: Hurricane Perils
Related Party Transaction [Line Items]
Reinsurance agreement, threshold									1,500.0
Affiliated Entity \| Bermuda Re \| Catastrophe Reinsurance \| Reinsurance Contract [Axis]: Hurricane Perils \| Subsequent Events
Related Party Transaction [Line Items]
Reinsurance agreement, threshold				$ 1,500.0
Affiliated Entity \| Ireland Insurance \| Catastrophe Reinsurance
Related Party Transaction [Line Items]
Reinsurance, excess retention, amount reinsured, per event \| €										€ 750
Reinsurance agreement, threshold \| €										15
Annual coverage fee \| €										€ 26
Affiliated Entity \| Ireland Re \| Catastrophe Reinsurance
Related Party Transaction [Line Items]
Reinsurance, excess retention, amount reinsured, per event \| €							€ 125						€ 61
Reinsurance agreement, threshold \| €							18						139
Annual coverage fee \| €							€ 9						€ 2
Affiliated Entity \| Lloyd’s Syndicate 2786 \| Catastrophe Reinsurance
Related Party Transaction [Line Items]
Reinsurance, excess retention, amount reinsured, per event						40.0
Reinsurance agreement, threshold																8.0
Annual coverage fee																4.0
Affiliated Entity \| Everest International - Australia Branch \| Catastrophe Reinsurance
Related Party Transaction [Line Items]
Reinsurance, excess retention, amount reinsured, per event								$ 162
Reinsurance agreement, threshold								38
Annual coverage fee								3
Affiliated Entity \| Everest International - Australia Branch \| Per Risk And Per Occurrence And Excess Of Loss Reinsurance
Related Party Transaction [Line Items]
Reinsurance, excess retention, amount reinsured, per event								8
Reinsurance agreement, threshold								65
Annual coverage fee								$ 3
Affiliated Entity \| Everest Canada \| Catastrophe Reinsurance
Related Party Transaction [Line Items]
Reinsurance, excess retention, amount reinsured, per event									150.0
Reinsurance agreement, threshold									25.0
Annual coverage fee									$ 5.0
Affiliated Entity \| Everest Mexico \| Catastrophe Reinsurance
Related Party Transaction [Line Items]
Weighted average percentage												0.99
Affiliated Entity \| Everest Mexico \| Catastrophe Reinsurance, Real Estate Fund
Related Party Transaction [Line Items]
Weighted average percentage									0.997	0.997	0.997
Affiliated Entity \| Everest Mexico \| Catastrohpe Reinsurance, All Remaining Lines Of Property And Casualty Business
Related Party Transaction [Line Items]
Weighted average percentage									0.99	0.99	0.99
Affiliated Entity \| Everest Chile \| Catastrophe Reinsurance
Related Party Transaction [Line Items]
Reinsurance, excess retention, amount reinsured, per event														140.0
Reinsurance agreement, threshold														7.0
Annual coverage fee														7.0
Weighted average percentage															0.65
Affiliated Entity \| Coverage Period, 2002 Through 2017
Related Party Transaction [Line Items]
Reinsurance recoverable for unpaid claims and claims adjustments						563.0			$ 563.0			$ 680.0		563.0		563.0
Affiliated Entity \| Coverage Period, 2002 Through 2017 \| Minimum
Related Party Transaction [Line Items]
Share reinsurance percentage																			20.00%
Affiliated Entity \| Coverage Period, 2002 Through 2017 \| Maximum
Related Party Transaction [Line Items]
Share reinsurance percentage																			60.00%
Affiliated Entity \| Coverage Period, 2004 Through 2009
Related Party Transaction [Line Items]
Reinsurance recoverable for unpaid claims and claims adjustments						$ 7.0			$ 7.0			8.0		$ 7.0		$ 7.0
Affiliated Entity \| Coverage Period, 2004 Through 2009 \| Minimum
Related Party Transaction [Line Items]
Share reinsurance percentage																	2.00%
Affiliated Entity \| Coverage Period, 2004 Through 2009 \| Maximum
Related Party Transaction [Line Items]
Share reinsurance percentage																	8.00%
Affiliated Entity \| Coverage Period, 2007 Through 2017
Related Party Transaction [Line Items]
Reinsurance recoverable for unpaid claims and claims adjustments												$ 37.0
Affiliated Entity \| Coverage Period, 2007 Through 2017 \| Minimum
Related Party Transaction [Line Items]
Share reinsurance percentage																		60.00%
Affiliated Entity \| Coverage Period, 2007 Through 2017 \| Maximum
Related Party Transaction [Line Items]
Share reinsurance percentage																		75.00%