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Pay vs Performance Disclosure | 12 Months Ended
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Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Pay vs Performance Disclosure [Line Items] |  |  |
Pay vs Performance [Table Text Block] | Average Summary Compensation Table Total for Non-PEO NEOs ($) 22 Average Compensation Actually Paid to Non-PEO NEOs ($) Value for Initial Fixed $100 Investmetn13 Based on: Year Summary Compensation Table Total for PEO($) 11 Compensation Actually Paid to PEO ($) 12 Total Shareholder Return ($) 15 Peer Group Total Shareholder Return($) 16 Net Income ($) Adjusted Operating ROE (%) 14 2022 9,106,199 12,022,513 3,275,300 4,098,149 128.89 151.65 597,000,000 11.9 2021 8,866,126 10,939,500 3,185,203 3,763,486 104.19 127.58 1,379,000,000 14.3 2020 8,063,212 5,604,559 3,209,042 2,323,534 86.94 106.96 514,000,000 8 11 Juan C. Andrade served as the Principal Executive Officer (“PEO”) of Everest for all applicable years in this table. 12 The non-PEO Named Executive Officers (“NEOs”) for 2020 include John Doucette, Craig Howie, Mark Kociancic, Sanjoy Mukherjee and Jonathan Zaffino; for 2021 include: John Doucette, Mike Karmilowicz, Mark Kociancic, Sanjoy Mukherjee and Jim Williamson; and for 2022 include: Mike Karmilowicz, Mark Kociancic, Sanjoy Mukherjee and Jim Williamson. 13 Assumes $100 invested on 12/31/19 in Everest common stock, including reinvestment of dividends. 14 Adjusted Operating ROE adjusts actual operating ROE by limiting catastrophe activity to 40% of anticipated catastrophe losses in the annual operating plan and 60% of actual catastrophe losses for the current fiscal year. For 2021 and 2022, the ratio for determining Adjusted Operating ROE was 50% anticipated catastrophe losses in the operating plan and 50% actual catastrophe losses for the respective fiscal years. 15 For purposes of Everest’s Pay Versus Performance Disclosure section, cumulative Total Shareholder Return is defined as the change in the total dollar value of a given security or entire portfolio of securities, over some period of time, assuming $100 dollars of initial investment. Total returns reflect changes in stock price as well as all distributions or dividends paid to shareholders. The procedure for calculating an index begins with calculating total returns for each individual company in the index. The total return of each company in the index is calculated by multiplying the closing price of a share by the ending shares held, based on a $100 initial investment. Any dividends paid are reinvested by dividing the dividend per share by the stock price on ex-dividend date, then adding the additional new shares to the beginning shares. Each company’s total return is then weighted for each period based on its market capitalization at the beginning of the period, relative to the market capitalization of the entire group. The market capitalization is determined by multiplying the price by the shares outstanding for each period. The sum of the weighted returns results in a weighted average total return for each period. Total Shareholder Return in all other sections of this proxy refers to Everest’s Investor Day definition, defined as annual growth in Book Value Per Share (excluding Unrealized Gains and Losses on Fixed Maturity investments) plus Dividends Per Share. 16 The S&P Insurance (Property and Casualty) Index is used as Everest’s peer group for purposes of the pay versus performance disclosure . |  |
Summary Compensation Table Total for PEO | $ 9,106,199 | $ 8,866,126 | $ 8,063,212
PEO Actually Paid Compensation Amount | 12,022,513 | 10,939,500 | 5,604,559
Non-PEO NEO Average Total Compensation Amount | 3,275,300 | 3,185,203 | 3,209,042
Non-PEO NEO Average Compensation Actually Paid Amount | 4,098,149 | 3,763,486 | 2,323,534
Total Shareholder Return Amount | 128.89 | 104.19 | 86.94
Peer Group Total Shareholder Return Amount | 151.65 | 127.58 | 106.96
Net Income (Loss) | $ 597,000,000 | $ 1,379,000,000 | $ 514,000,000
Company Selected Measure Amount | 0.119 | 0.143 | 0.08
Named Executive Officers, Footnote [Text Block] | Juan C. Andrade served as the Principal Executive Officer (“PEO”) of Everest for all applicable years in this table. |  |
PEO Name | Juan C. Andrade | Juan C. Andrade | Juan
Company Selected Measure Name | Adjusted Operating ROE |  |
Peer Group Issuers, Footnote [Text Block] | The S&P Insurance (Property and Casualty) Index is used as Everest’s peer group for purposes of the pay versus performance disclosure . |  |
Adjustment To PEO Compensation, Footnote [Text Block] | Fiscal Year 2020 2021 2022 SCT Total $8,063,212 $8,866,126 $9,106,199 – Grant Date Fair Value of Stock Awards Granted in Fiscal Year $(3,752,544) $(4,001,805) $(4,251,644) + Fair Value at Fiscal Year -End of Outstanding Unvested Stock Awards Granted in Fiscal Year $3,169,579 $4,525,158 $4,670,907 ± Change in Fair Value of Outstanding Unvested Stock Awards Granted in Prior Fiscal Years17 $(1,312,596) $1,402,574 $2,354,332 ± Change in Fair Value as of Vesting Date of Stock Awards Granted in Prior Fiscal Years for Which Applicable Vesting Conditions Were Satisfied During Fiscal Year18 $(563,092) $147,447 $142,718 Compensation Actually Paid $5,604,559 $10,939,500 $12,022,513 17 Difference between Fair Value from End of Prior Year to End of Current Year 18 Difference between Fair Value from End of Prior Year to Vesting Date 19 Difference between Fair Value from End of Prior Year to End of Current Year 20 Difference between Fair Value from End of Prior Year to Vesting Date 21 In 2021, the change in actuarial present value was negative $11,030 for Mr. Doucette and $81,008 for Mr. Mukherjee. Under the rule, the change in actuarial present value is deducted only if the value is positive. Thus, only Mr. Mukherjee’s value was incorporated into the calculation. 22 The change in actuarial present value for Mr. Mukherjee was negative $600,167 in 2022. Under the rule, the change in actuarial present value is deducted only if the value is positive. Thus, this value was not incorporated into the calculation. |  |
Adjustment to Non-PEO NEO Compensation Footnote [Text Block] | Fiscal Year 2020 2021 2022 Average SCT Total $3,209,042 $3,185,203 $3,275,300 – Grant Date Fair Value of Stock Awards Granted in Fiscal Year $(1,799,573) $(1,164,932) $(1,276,247) + Fair Value at Fiscal Year -End of Outstanding Unvested Stock Awards Granted in Fiscal Year $1,455,572 $1,317,281 $1,402,100 ± Change in Fair Value of Outstanding Unvested Stock Awards Granted in Prior Fiscal Years19 $(236,502) $362,214 $563,880 ± Change in Fair Value as of Vesting Date of Stock Awards Granted in Prior Fiscal Years for Which Applicable Vesting Conditions Were Satisfied During Fiscal Year20 $(95,518) $49,873 $114,067 – Change in Actuarial Present Value of Accumulated Benefit Under Defined Benefit Pension Plan $(235,821) $(16,202) 21 N/A + Service cost and prior service cost $26,334 $30,048 $19,050 Average Compensation Actually Paid $2,323,534 $3,763,486 $4,098,149 17 Difference between Fair Value from End of Prior Year to End of Current Year 18 Difference between Fair Value from End of Prior Year to Vesting Date 19 Difference between Fair Value from End of Prior Year to End of Current Year 20 Difference between Fair Value from End of Prior Year to Vesting Date 21 In 2021, the change in actuarial present value was negative $11,030 for Mr. Doucette and $81,008 for Mr. Mukherjee. Under the rule, the change in actuarial present value is deducted only if the value is positive. Thus, only Mr. Mukherjee’s value was incorporated into the calculation. 22 The change in actuarial present value for Mr. Mukherjee was negative $600,167 in 2022. Under the rule, the change in actuarial present value is deducted only if the value is positive. Thus, this value was not incorporated into the calculation. |  |
Total Shareholder Return Vs Peer Group [Text Block] | Comparison of 3 Year Cumulative TSR Everest Re Group, Ltd. versus S&P Property & Casualty Insurance |  |
Compensation Actually Paid vs. Total Shareholder Return [Text Block] | Compensation Actually Paid (“CAP”) versus Cumulative Total Shareholder Return (“TSR”) |  |
Compensation Actually Paid vs. Net Income [Text Block] | Compensation Actually Paid (“CAP”) versus Net Income |  |
Compensation Actually Paid vs. Company Selected Measure [Text Block] | Compensation Actually Paid (“CAP”) versus Adjusted Operating ROE |  |
Tabular List [Table Text Block] | Adjusted Operating ROE Combined Ratio Operating Expense Ratio Total Shareholder Return (as defined at Everest’s Investor Day 23 ) Gross Written Premium Annual Growth Rate |  |
PEO [Member] | Grant Date Fair Value of Stock Awards Granted in Fiscal Year [Member] |  |  |
Pay vs Performance Disclosure [Line Items] |  |  |
Adjustment to Compensation Amount | $ (4,251,644) | $ (4,001,805) | $ (3,752,544)
PEO [Member] | Fair Value at Fiscal Year-End of Outstanding Unvested Stock Awards Granted in Fiscal Year [Member] |  |  |
Pay vs Performance Disclosure [Line Items] |  |  |
Adjustment to Compensation Amount | 4,670,907 | 4,525,158 | 3,169,579
PEO [Member] | Change in Fair Value of Outstanding Unvested Stock Awards Granted in Prior Fiscal Years [Member] |  |  |
Pay vs Performance Disclosure [Line Items] |  |  |
Adjustment to Compensation Amount | 2,354,332 | 1,402,574 | (1,312,596)
PEO [Member] | Change in Fair Value as of Vesting Date of Stock Awards Granted in Prior Fiscal Years for Which Applicable Vesting Conditions Were Satisfied During Fiscal Year [Member] |  |  |
Pay vs Performance Disclosure [Line Items] |  |  |
Adjustment to Compensation Amount | 142,718 | 147,447 | (563,092)
Non-PEO NEO [Member] | Grant Date Fair Value of Stock Awards Granted in Fiscal Year [Member] |  |  |
Pay vs Performance Disclosure [Line Items] |  |  |
Adjustment to Compensation Amount | (1,276,247) | (1,164,932) | (1,799,573)
Non-PEO NEO [Member] | Fair Value at Fiscal Year-End of Outstanding Unvested Stock Awards Granted in Fiscal Year [Member] |  |  |
Pay vs Performance Disclosure [Line Items] |  |  |
Adjustment to Compensation Amount | 1,402,100 | 1,317,281 | 1,455,572
Non-PEO NEO [Member] | Change in Fair Value of Outstanding Unvested Stock Awards Granted in Prior Fiscal Years [Member] |  |  |
Pay vs Performance Disclosure [Line Items] |  |  |
Adjustment to Compensation Amount | 563,880 | 362,214 | (236,502)
Non-PEO NEO [Member] | Change in Fair Value as of Vesting Date of Stock Awards Granted in Prior Fiscal Years for Which Applicable Vesting Conditions Were Satisfied During Fiscal Year [Member] |  |  |
Pay vs Performance Disclosure [Line Items] |  |  |
Adjustment to Compensation Amount | 114,067 | 49,873 | (95,518)
Non-PEO NEO [Member] | Change in Actuarial Present Value of Accumulated Benefit Under Defined Benefit Pension Plan [Member] |  |  |
Pay vs Performance Disclosure [Line Items] |  |  |
Adjustment to Compensation Amount |  | (16,202) | (235,821)
Non-PEO NEO [Member] | Service Cost and Prior Service Cost [Member] |  |  |
Pay vs Performance Disclosure [Line Items] |  |  |
Adjustment to Compensation Amount | $ 19,050 | $ 30,048 | $ 26,334

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