$EG
EVEREST GROUP, LTD. Stock $eg

$eg Overview Financials Valuation SEC Filings Company Website

2019 Q2 Form 10-K Financial Statement

#000109507320000006 Filed on March 02, 2020

Income Statement

Concept	2019 Q2	2019 Q1	2019
Revenue	$2.009B	$1.966B	$8.231B
YoY Change	6.66%	12.33%	11.81%
Cost Of Revenue	$1.095B	$1.049B	$4.923B
YoY Change	-18.39%	-0.82%	-12.89%
Gross Profit	$914.1M	$917.3M	$3.308B
YoY Change	68.65%	32.37%	93.46%
Gross Profit Margin	45.51%	46.66%	40.19%
Selling, General & Admin	$428.5M	$396.1M	$1.737B
YoY Change	9.87%	8.05%	12.07%
% of Gross Profit	46.88%	43.18%	52.5%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization			$1.704B
YoY Change			12.16%
% of Gross Profit			51.5%
Operating Expenses	$1.628B	$1.544B	$7.101B
YoY Change	-10.77%	1.55%	-6.24%
Operating Profit	-$713.8M	-$626.4M	-$3.792B
YoY Change	-44.34%	-24.27%	-35.31%
Interest Expense	$8.434M	$7.631M	$31.69M
YoY Change	9.14%	2.87%	2.13%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$372.3M	$414.5M	$1.099B
YoY Change	627.89%	86.22%	-553.79%
Income Tax	$39.48M	$59.99M	$89.53M
% Of Pretax Income	10.6%	14.47%	8.15%
Net Earnings	$332.9M	$354.6M	$1.009B
YoY Change	447.6%	64.76%	1033.7%
Net Earnings / Revenue	16.57%	18.04%	12.26%
Basic Earnings Per Share	$8.17	$8.70	$24.77
Diluted Earnings Per Share	$8.15	$8.67	$24.70
COMMON SHARES
Basic Shares Outstanding	40.28M shares	40.30M shares	40.29K shares
Diluted Shares Outstanding	40.40M shares	40.45M shares	40.42K shares

Balance Sheet

Concept	2019 Q2	2019 Q1	2019
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$661.4M	$584.0M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$70.00M	$70.00M	$161.0M
YoY Change
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$1.669B	$1.644B	$19.94B
YoY Change	-90.51%	-90.81%	12.17%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$26.34B	$25.59B	$27.32B
YoY Change	10.28%	8.85%	10.4%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$80.00M	$85.00M	$173.0M
YoY Change	2566.67%	962.5%	5666.67%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$226.0M	$196.0M	$204.0M
YoY Change	289.66%	237.93%	277.78%
LONG-TERM LIABILITIES
Long-Term Debt	$634.0M	$634.0M	$634.0M
YoY Change	0.0%	0.16%	0.0%
Other Long-Term Liabilities	$263.0M	$117.0M	$341.0M
YoY Change	-32.56%	-55.34%	18.82%
Total Long-Term Liabilities	$897.0M	$751.0M	$975.0M
YoY Change	-12.4%	-16.09%	5.86%
TOTAL LIABILITIES
Total Short-Term Liabilities	$226.0M	$196.0M	$204.0M
Total Long-Term Liabilities	$897.0M	$751.0M	$975.0M
Total Liabilities	$17.50B	$17.20B	$18.19B
YoY Change	11.88%	13.41%	7.7%
SHAREHOLDERS EQUITY
Retained Earnings	$10.10B	$9.829B
YoY Change
Common Stock	$694.0K	$694.0K
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)	$3.422B	$3.414B
YoY Change
Treasury Stock Shares	28.67M shares	$28.63M
Shareholders Equity	$8.837B	$8.389B	$9.133B
YoY Change
Total Liabilities & Shareholders Equity	$26.34B	$25.59B	$27.32B
YoY Change	10.28%	8.85%	10.4%

Cashflow Statement

Concept	2019 Q2	2019 Q1	2019
OPERATING ACTIVITIES
Net Income	$332.9M	$354.6M	$1.009B
YoY Change	447.6%	64.76%	1033.7%
Depreciation, Depletion And Amortization			$1.704B
YoY Change			12.16%
Cash From Operating Activities	$393.7M	$459.8M	$1.852B
YoY Change	-724.92%	135.02%	203.57%
INVESTING ACTIVITIES
Capital Expenditures
YoY Change
Acquisitions
YoY Change
Other Investing Activities	-$257.6M	-$432.8M	-$1.413B
YoY Change	-547.22%	681.23%	405.19%
Cash From Investing Activities	-$257.6M	-$432.8M	-$1.412B
YoY Change	-547.22%	680.91%	405.15%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$16.15M	$24.60M
YoY Change			-67.33%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-65.00M	-$93.02M	-$275.7M
YoY Change	-17.93%	21.01%	-12.92%
NET CHANGE
Cash From Operating Activities	393.7M	$459.8M	$1.852B
Cash From Investing Activities	-257.6M	-$432.8M	-$1.412B
Cash From Financing Activities	-65.00M	-$93.02M	-$275.7M
Net Change In Cash	71.10M	-$72.12M	$151.9M
YoY Change	-184.04%	-210.08%	622.57%
FREE CASH FLOW
Cash From Operating Activities	$393.7M	$459.8M	$1.852B
Capital Expenditures
Free Cash Flow
YoY Change

Facts In Submission

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CY2019	dei	Entity File Number EntityFileNumber	1-15731
CY2019	dei	Entity Registrant Name EntityRegistrantName	EVEREST RE GROUP, LTD.
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	D0
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CY2019	dei	Trading Symbol TradingSymbol	RE
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CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	HM 19
CY2019	dei	Entity Address Country EntityAddressCountry	BM
CY2019	dei	City Area Code CityAreaCode	441
CY2019	dei	Local Phone Number LocalPhoneNumber	295-0006
CY2019	dei	Entity Small Business EntitySmallBusiness	false
CY2019	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2019	dei	Entity Shell Company EntityShellCompany	false
CY2019Q2	dei	Entity Public Float EntityPublicFloat	10070237000	USD
CY2019	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2020Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	40813432	shares
CY2019Q4	re	Available For Sale Securities Debt Securities Market Value AvailableForSaleSecuritiesDebtSecuritiesMarketValue	16824944000	USD
CY2018Q4	re	Available For Sale Securities Debt Securities Market Value AvailableForSaleSecuritiesDebtSecuritiesMarketValue	15225263000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	16473491000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	15406572000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	2337000	USD
CY2019Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	931457000	USD
CY2018Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	716639000	USD
CY2019Q4	re	Other Short Term Investments Cost OtherShortTermInvestmentsCost	414639000	USD
CY2018Q4	re	Other Short Term Investments Cost OtherShortTermInvestmentsCost	241010000	USD
CY2018Q4	us-gaap	Other Assets OtherAssets	358042000	USD
CY2019Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	414706000	USD
CY2018Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	240987000	USD
CY2019Q4	us-gaap	Equity Method Investment Aggregate Cost EquityMethodInvestmentAggregateCost	1763531000	USD
CY2018Q4	us-gaap	Equity Method Investment Aggregate Cost EquityMethodInvestmentAggregateCost	1591745000	USD
CY2019Q4	us-gaap	Equity Method Investments EquityMethodInvestments	1763531000	USD
CY2018Q4	us-gaap	Equity Method Investments EquityMethodInvestments	1591745000	USD
CY2019Q4	us-gaap	Cash Cash	808036000	USD
CY2018Q4	us-gaap	Cash Cash	656095000	USD
CY2019Q4	us-gaap	Investments And Cash InvestmentsAndCash	20748500000	USD
CY2018Q4	us-gaap	Investments And Cash InvestmentsAndCash	18433066000	USD
CY2019Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	116804000	USD
CY2018Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	104619000	USD
CY2019Q4	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	2259088000	USD
CY2018Q4	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	2183183000	USD
CY2019Q4	us-gaap	Reinsurance Recoverables On Paid Losses ReinsuranceRecoverablesOnPaidLosses	1763471000	USD
CY2018Q4	us-gaap	Reinsurance Recoverables On Paid Losses ReinsuranceRecoverablesOnPaidLosses	1787648000	USD
CY2019Q4	us-gaap	Funds Held Under Reinsurance Agreements Asset FundsHeldUnderReinsuranceAgreementsAsset	489901000	USD
CY2018Q4	us-gaap	Funds Held Under Reinsurance Agreements Asset FundsHeldUnderReinsuranceAgreementsAsset	435031000	USD
CY2019Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	581863000	USD
CY2018Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	511573000	USD
CY2019Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	445716000	USD
CY2018Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	343343000	USD
CY2019Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	305711000	USD
CY2018Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	594487000	USD
CY2019Q4	us-gaap	Other Assets OtherAssets	612997000	USD
CY2019Q4	us-gaap	Other Liabilities OtherLiabilities	453264000	USD
CY2018Q4	us-gaap	Other Liabilities OtherLiabilities	189882000	USD
CY2018Q4	us-gaap	Reinsurance Payable ReinsurancePayable	218439000	USD
CY2019Q4	us-gaap	Assets Assets	27324051000	USD
CY2018Q4	us-gaap	Assets Assets	24750992000	USD
CY2019Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	13611313000	USD
CY2018Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	13119090000	USD
CY2019Q4	us-gaap	Liability For Future Policy Benefits LiabilityForFuturePolicyBenefits	42592000	USD
CY2018Q4	us-gaap	Liability For Future Policy Benefits LiabilityForFuturePolicyBenefits	46778000	USD
CY2019Q4	us-gaap	Unearned Premiums UnearnedPremiums	3056735000	USD
CY2018Q4	us-gaap	Unearned Premiums UnearnedPremiums	2517612000	USD
CY2019Q4	us-gaap	Funds Held Under Reinsurance Agreements Liability FundsHeldUnderReinsuranceAgreementsLiability	10668000	USD
CY2018Q4	us-gaap	Funds Held Under Reinsurance Agreements Liability FundsHeldUnderReinsuranceAgreementsLiability	13099000	USD
CY2019Q4	us-gaap	Reinsurance Payable ReinsurancePayable	291660000	USD
CY2019Q4	re	Loss In Course Of Payment LossInCourseOfPayment	51950000	USD
CY2018Q4	re	Loss In Course Of Payment LossInCourseOfPayment	85519000	USD
CY2019Q4	us-gaap	Senior Notes SeniorNotes	397074000	USD
CY2018Q4	us-gaap	Senior Notes SeniorNotes	396954000	USD
CY2019Q4	us-gaap	Subordinated Debt SubordinatedDebt	236758000	USD
CY2018Q4	us-gaap	Subordinated Debt SubordinatedDebt	236659000	USD
CY2019Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	2878000	USD
CY2018Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	3093000	USD
CY2019Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	5584000	USD
CY2018Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	11958000	USD
CY2019Q4	us-gaap	Other Payables To Broker Dealers And Clearing Organizations OtherPayablesToBrokerDealersAndClearingOrganizations	30650000	USD
CY2018Q4	us-gaap	Other Payables To Broker Dealers And Clearing Organizations OtherPayablesToBrokerDealersAndClearingOrganizations	51112000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	18191126000	USD
CY2018Q4	us-gaap	Liabilities Liabilities	16890195000	USD
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	69202000	shares
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	694000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	692000	USD
CY2019Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	2219660000	USD
CY2018Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	2188777000	USD
CY2019	re	Accumulated Other Comprehensive Income Loss Tax AccumulatedOtherComprehensiveIncomeLossTax	30996000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	28152000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-462557000	USD
CY2019Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	28665000	shares
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	28551000	shares
CY2019Q4	us-gaap	Treasury Stock Value TreasuryStockValue	3422152000	USD
CY2018Q4	us-gaap	Treasury Stock Value TreasuryStockValue	3397548000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	10306571000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	9531433000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	9132925000	USD
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CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	24750992000	USD
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CY2017	us-gaap	Premiums Earned Net PremiumsEarnedNet	5937840000	USD
CY2019	us-gaap	Net Investment Income NetInvestmentIncome	647139000	USD
CY2018	us-gaap	Net Investment Income NetInvestmentIncome	581183000	USD
CY2017	us-gaap	Net Investment Income NetInvestmentIncome	542898000	USD
CY2017	us-gaap	Impairment Of Investments ImpairmentOfInvestments	7093000	USD
CY2019	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	205903000	USD
CY2018	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	-119026000	USD
CY2017	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	160287000	USD
CY2017	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	1303963000	USD
CY2019	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	185004000	USD
CY2018	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	-127136000	USD
CY2017	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	153194000	USD
CY2019	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	6374000	USD
CY2018	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	520000	USD
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CY2018	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-24771000	USD
CY2017	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-21215000	USD
CY2019	us-gaap	Revenues Revenues	8231169000	USD
CY2017	us-gaap	Revenues Revenues	6622298000	USD
CY2019	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	4922898000	USD
CY2018	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	5651403000	USD
CY2017	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	4522581000	USD
CY2019	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	1703726000	USD
CY2018	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	1519030000	USD
CY2019	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	440899000	USD
CY2018	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	371541000	USD
CY2017	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	318817000	USD
CY2019	re	Corporate Expenses CorporateExpenses	32966000	USD
CY2018	re	Corporate Expenses CorporateExpenses	30672000	USD
CY2017	re	Corporate Expenses CorporateExpenses	25923000	USD
CY2019	us-gaap	Interest Expense InterestExpense	31693000	USD
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CY2017	us-gaap	Interest Expense InterestExpense	31603000	USD
CY2019	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	7132182000	USD
CY2018	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	7603677000	USD
CY2017	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	6202887000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1098987000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	419411000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	89526000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-63340000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	1009461000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	89041000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	482751000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	496430000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-255656000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-64348000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	12613000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-27496000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	6950000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	483817000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-228160000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-71298000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	14030000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-76816000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	121917000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	12591000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	510000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	-1027000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-5453000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-5021000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	490709000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-5477000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-4511000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-6504000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	86049000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	7138000	USD
CY2019	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	402380000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	482751000	USD
CY2019	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	62018000	USD
CY2017	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	350446000	USD
CY2019	us-gaap	Increase Decrease In Funds Held Under Reinsurance Agreements IncreaseDecreaseInFundsHeldUnderReinsuranceAgreements	56722000	USD
CY2018	us-gaap	Increase Decrease In Funds Held Under Reinsurance Agreements IncreaseDecreaseInFundsHeldUnderReinsuranceAgreements	153627000	USD
CY2017	us-gaap	Increase Decrease In Funds Held Under Reinsurance Agreements IncreaseDecreaseInFundsHeldUnderReinsuranceAgreements	33220000	USD
CY2019	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	-67444000	USD
CY2017	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	238485000	USD
CY2019	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-237479000	USD
CY2017	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	114077000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	95207000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-300465000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	57123000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1500170000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-211424000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	539874000	USD
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	24.77
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.18
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	11.77
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	24.70
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.17
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	11.70
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	5.75
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	5.30
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	5.05
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	9132925000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	7860797000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	8340736000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	1009461000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	89041000	USD
CY2017	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	1376321000	USD
CY2019	us-gaap	Increase Decrease In Future Policy Benefit Reserves IncreaseDecreaseInFuturePolicyBenefitReserves	-4186000	USD
CY2017	us-gaap	Increase Decrease In Future Policy Benefit Reserves IncreaseDecreaseInFuturePolicyBenefitReserves	-4060000	USD
CY2019	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	521709000	USD
CY2017	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	401174000	USD
CY2019	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	66477000	USD
CY2017	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	10071000	USD
CY2019	re	Increase Decrease In Losses In Course Of Payment IncreaseDecreaseInLossesInCourseOfPayment	-33557000	USD
CY2017	re	Increase Decrease In Losses In Course Of Payment IncreaseDecreaseInLossesInCourseOfPayment	-105371000	USD
CY2019	re	Change In Equity Adjustments In Limited Partnerships ChangeInEquityAdjustmentsInLimitedPartnerships	108332000	USD
CY2017	re	Change In Equity Adjustments In Limited Partnerships ChangeInEquityAdjustmentsInLimitedPartnerships	82713000	USD
CY2019	us-gaap	Reimbursement From Limited Partnership Investment ReimbursementFromLimitedPartnershipInvestment	81300000	USD
CY2017	us-gaap	Reimbursement From Limited Partnership Investment ReimbursementFromLimitedPartnershipInvestment	50825000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	54176000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	66998000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	34018000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	32369000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	30297000	USD
CY2019	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	30936000	USD
CY2017	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	45867000	USD
CY2019	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	185004000	USD
CY2018	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	520000	USD
CY2019	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	4503071000	USD
CY2017	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	3343239000	USD
CY2018	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	-127136000	USD
CY2017	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	153194000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1852002000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1162693000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	2302299000	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	1973652000	USD
CY2017	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	2160298000	USD
CY2019	re	Proceeds From Sale Of Available For Sale Securities Debt Market Value ProceedsFromSaleOfAvailableForSaleSecuritiesDebtMarketValue	3280237000	USD
CY2017	re	Proceeds From Sale Of Available For Sale Securities Debt Market Value ProceedsFromSaleOfAvailableForSaleSecuritiesDebtMarketValue	2401844000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	2917000	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	1751000	USD
CY2017	re	Proceeds From Sale Of Available For Sale Securities Equity Market Value ProceedsFromSaleOfAvailableForSaleSecuritiesEquityMarketValue	19574000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	283965000	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	1199409000	USD
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	631859000	USD
CY2019	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	284558000	USD
CY2018	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	3102018000	USD
CY2017	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	5579043000	USD
CY2019	re	Payments To Acquire Available For Sale Securities Debt Market Value PaymentsToAcquireAvailableForSaleSecuritiesDebtMarketValue	6613917000	USD
CY2018	re	Payments To Acquire Available For Sale Securities Debt Market Value PaymentsToAcquireAvailableForSaleSecuritiesDebtMarketValue	5909504000	USD
CY2017	re	Payments To Acquire Available For Sale Securities Debt Market Value PaymentsToAcquireAvailableForSaleSecuritiesDebtMarketValue	5131098000	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	4243000	USD
CY2018	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	4381000	USD
CY2017	re	Payments To Acquire Available For Sale Securities Equity Market Value PaymentsToAcquireAvailableForSaleSecuritiesEquityMarketValue	22033000	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities Equity PaymentsToAcquireAvailableForSaleSecuritiesEquity	329417000	USD
CY2018	us-gaap	Payments To Acquire Available For Sale Securities Equity PaymentsToAcquireAvailableForSaleSecuritiesEquity	921937000	USD
CY2017	us-gaap	Payments To Acquire Available For Sale Securities Equity PaymentsToAcquireAvailableForSaleSecuritiesEquity	438641000	USD
CY2019	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	425438000	USD
CY2018	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	3370455000	USD
CY2017	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	5829271000	USD
CY2019	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	167290000	USD
CY2018	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	-455350000	USD
CY2017	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	73923000	USD
CY2019	re	Net Change In Unsettled Securities Transactions NetChangeInUnsettledSecuritiesTransactions	26163000	USD
CY2018	re	Net Change In Unsettled Securities Transactions NetChangeInUnsettledSecuritiesTransactions	-46048000	USD
CY2017	re	Net Change In Unsettled Securities Transactions NetChangeInUnsettledSecuritiesTransactions	30229000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1412492000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-279621000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-732577000	USD
CY2019	re	Payments For Shares Issued For Share Based Compensation Net Of Expense PaymentsForSharesIssuedForShareBasedCompensationNetOfExpense	3134000	USD
CY2018	re	Payments For Shares Issued For Share Based Compensation Net Of Expense PaymentsForSharesIssuedForShareBasedCompensationNetOfExpense	8157000	USD
CY2017	re	Payments For Shares Issued For Share Based Compensation Net Of Expense PaymentsForSharesIssuedForShareBasedCompensationNetOfExpense	5310000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	24604000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	75304000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	50000000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	234322000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	216221000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	207242000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	13627000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	16912000	USD
CY2017	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	12906000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-275687000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-316594000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-11882000	USD
CY2017	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-1513000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	151941000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	153145000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	656095000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	635067000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	481922000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	808036000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	656095000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	635067000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-148585000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-65064000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	164856000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	31689000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	35973000	USD
CY2018	re	Fixed Maturities Available For Sale At Market Value FixedMaturitiesAvailableForSaleAtMarketValue	143656000	USD
CY2018	re	Non Cash Transactions Short Term Investments NonCashTransactionsShortTermInvestments	243864000	USD
CY2018	re	Non Cash Investments Other Invested Assets NonCashInvestmentsOtherInvestedAssets	-387520000	USD
CY2019	re	Reinsurance Recoverable And Premium Receivables ReinsuranceRecoverableAndPremiumReceivables	25605000	USD
CY2018	re	Reinsurance Recoverable And Premium Receivables ReinsuranceRecoverableAndPremiumReceivables	25611000	USD
CY2019	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	1703726000	USD
CY2018	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	1519030000	USD
CY2017	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	1303963000	USD
CY2018	us-gaap	Dividends Common Stock DividendsCommonStock	216221000	USD
CY2019	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	40291	shares
CY2018	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	40388	shares
CY2019	us-gaap	Dividends Common Stock DividendsCommonStock	234322000	USD
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	40843	shares
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	24.77
CY2017	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	-293386000	USD
CY2019	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	4922898000	USD
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.18
CY2019	re	Minimum Percent Of Prepaid Reinsurance Premiums For Any Foreign Reinsurers That Were Collateralized MinimumPercentOfPrepaidReinsurancePremiumsForAnyForeignReinsurersThatWereCollateralized	0.10	pure
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	11.77
CY2019	us-gaap	Profit Loss ProfitLoss	1009461000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	89041000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	482751000	USD
CY2017	re	Dividend Declared Common Shareholders DividendDeclaredCommonShareholders	205182000	USD
CY2019	re	Numerator For Basic And Diluted Earnings Per Common Share NumeratorForBasicAndDilutedEarningsPerCommonShare	998182000	USD
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	24.70
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.17
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	11.70
CY2018	re	Numerator For Basic And Diluted Earnings Per Common Share NumeratorForBasicAndDilutedEarningsPerCommonShare	88239000	USD
CY2017	re	Numerator For Basic And Diluted Earnings Per Common Share NumeratorForBasicAndDilutedEarningsPerCommonShare	477771000	USD
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	40291	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	40388	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	40595	shares
CY2017	us-gaap	Dividends Common Stock DividendsCommonStock	207242000	USD
CY2019	us-gaap	Undistributed Earnings UndistributedEarnings	775139000	USD
CY2018	us-gaap	Undistributed Earnings UndistributedEarnings	-127180000	USD
CY2017	us-gaap	Undistributed Earnings UndistributedEarnings	275508000	USD
CY2019	re	Percentage Allocated To Common Shareholders PercentageAllocatedToCommonShareholders	0.989	pure
CY2018	re	Percentage Allocated To Common Shareholders PercentageAllocatedToCommonShareholders	0.990	pure
CY2017	re	Percentage Allocated To Common Shareholders PercentageAllocatedToCommonShareholders	0.989	pure
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	766386000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-125848000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	272589000	USD
CY2019	re	Dividend Declared Common Shareholders DividendDeclaredCommonShareholders	231796000	USD
CY2018	re	Dividend Declared Common Shareholders DividendDeclaredCommonShareholders	214088000	USD
CY2017	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	40595	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	129	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	198	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	248	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	40420	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	40586	shares
CY2019	re	Basic Weighted Average Common Shares Outstanding And Nonvested Common Shares Expected To Vest BasicWeightedAverageCommonSharesOutstandingAndNonvestedCommonSharesExpectedToVest	40751	shares
CY2018	re	Basic Weighted Average Common Shares Outstanding And Nonvested Common Shares Expected To Vest BasicWeightedAverageCommonSharesOutstandingAndNonvestedCommonSharesExpectedToVest	40816	shares
CY2017	re	Basic Weighted Average Common Shares Outstanding And Nonvested Common Shares Expected To Vest BasicWeightedAverageCommonSharesOutstandingAndNonvestedCommonSharesExpectedToVest	41030	shares
CY2019	re	Percentage Allocated To Common Shareholders PercentageAllocatedToCommonShareholders	0.989	pure
CY2018	re	Percentage Allocated To Common Shareholders PercentageAllocatedToCommonShareholders	0.990	pure
CY2017	re	Percentage Allocated To Common Shareholders PercentageAllocatedToCommonShareholders	0.989	pure
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2019	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	4	Item
CY2001	re	Equity Index Put Option Contracts Sold EquityIndexPutOptionContractsSold	7	Item
CY2001	re	Derivatives Number Of Indices DerivativesNumberOfIndices	2	Item
CY2018	re	Percentage Threshold That Triggers Review Of Available For Sale Debt Securities For Declines In Market Value PercentageThresholdThatTriggersReviewOfAvailableForSaleDebtSecuritiesForDeclinesInMarketValue	0.80	pure
CY2019	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	6374000	USD
CY2018	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	520000	USD
CY2017	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	9581000	USD
CY2016Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	10312313000	USD
CY2018Q4	us-gaap	Reinsurance Recoverables ReinsuranceRecoverables	1619641000	USD
CY2017Q4	us-gaap	Reinsurance Recoverables ReinsuranceRecoverables	1212649000	USD
CY2016Q4	us-gaap	Reinsurance Recoverables ReinsuranceRecoverables	990862000	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2019Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	69869000	USD
CY2019Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	77270000	USD
CY2019Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	16473491000	USD
CY2019Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	472622000	USD
CY2019Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	121169000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Other Than Temporary Impairment Not Credit Loss Net Of Tax Availableforsale Debt Securities AccumulatedOtherComprehensiveIncomeLossOtherThanTemporaryImpairmentNotCreditLossNetOfTaxAvailableforsaleDebtSecurities	987000	USD
CY2019Q4	re	Available For Sale Securities Debt Securities Market Value AvailableForSaleSecuritiesDebtSecuritiesMarketValue	16824944000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	15406572000	USD
CY2018Q4	re	Reserve For Losses And Loss Adjustment Expenses Net ReserveForLossesAndLossAdjustmentExpensesNet	11499449000	USD
CY2017Q4	re	Reserve For Losses And Loss Adjustment Expenses Net ReserveForLossesAndLossAdjustmentExpensesNet	10671672000	USD
CY2019	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	185004000	USD
CY2018	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	-127136000	USD
CY2019Q4	re	Short Duration Insurance Contracts Liability For Unpaid Claims And Claims Adjustment Expense ShortDurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense	202005000	USD
CY2017	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	153194000	USD
CY2019Q4	us-gaap	Asset Backed Securities At Carrying Value AssetBackedSecuritiesAtCarryingValue	1549145000	USD
CY2019Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	13611313000	USD
CY2018Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	13119090000	USD
CY2017Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	11884321000	USD
CY2019	re	Gross Investment Income Before Adjustment GrossInvestmentIncomeBeforeAdjustment	677347000	USD
CY2018	re	Gross Investment Income Before Adjustment GrossInvestmentIncomeBeforeAdjustment	615802000	USD
CY2017	re	Gross Investment Income Before Adjustment GrossInvestmentIncomeBeforeAdjustment	559773000	USD
CY2019	re	Funds Held Interest Income Expense FundsHeldInterestIncomeExpense	13271000	USD
CY2018	re	Funds Held Interest Income Expense FundsHeldInterestIncomeExpense	6300000	USD
CY2017	re	Funds Held Interest Income Expense FundsHeldInterestIncomeExpense	11874000	USD
CY2019	re	Future Policy Benefit Reserve Income Expense FuturePolicyBenefitReserveIncomeExpense	-1380000	USD
CY2018	re	Future Policy Benefit Reserve Income Expense FuturePolicyBenefitReserveIncomeExpense	-1419000	USD
CY2017	re	Future Policy Benefit Reserve Income Expense FuturePolicyBenefitReserveIncomeExpense	-1282000	USD
CY2019	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	689238000	USD
CY2018	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	620683000	USD
CY2017	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	570365000	USD
CY2019	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	42099000	USD
CY2018	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	39500000	USD
CY2017	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	27467000	USD
CY2019	us-gaap	Investment Income Net InvestmentIncomeNet	647139000	USD
CY2018	us-gaap	Investment Income Net InvestmentIncomeNet	581183000	USD
CY2017	us-gaap	Investment Income Net InvestmentIncomeNet	542898000	USD
CY2019Q4	re	Additional Contractual Commitments AdditionalContractualCommitments	1016811000	USD
CY2018Q3	re	Reclassification From Other Invested Assets To Fixed Maturity Securities ReclassificationFromOtherInvestedAssetsToFixedMaturitySecurities	143656000	USD
CY2018Q3	re	Reclassification Of Other Invested Assets To Short Term Investments ReclassificationOfOtherInvestedAssetsToShortTermInvestments	243864000	USD
CY2016Q4	re	Reserve For Losses And Loss Adjustment Expenses Net ReserveForLossesAndLossAdjustmentExpensesNet	9321451000	USD
CY2019	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	4986456000	USD
CY2018	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	5264327000	USD
CY2017	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	4815967000	USD
CY2019	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	-63558000	USD
CY2018	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	387076000	USD
CY2018Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	13119090000	USD
CY2017Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	11884321000	USD
CY2019	re	Number Of Exposure Groups NumberOfExposureGroups	200	Item
CY2019	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	4986456000	USD
CY2019	re	Expiry Of Asbestos And Environmental Claims Receivables Years ExpiryOfAsbestosAndEnvironmentalClaimsReceivablesYears	P20Y
CY2019	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	2460825000	USD
CY2017	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	2062634000	USD
CY2018	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	5264327000	USD
CY2017	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	4815967000	USD
CY2017	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	4522581000	USD
CY2019	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	2042246000	USD
CY2017	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	1280605000	USD
CY2019	re	Causes Of Increase Decrease In Liability For Unpaid Claims And Claims Adjustment Expense Related To Reserves1 CausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseRelatedToReserves1	415585000	USD
CY2019	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	-63558000	USD
CY2018	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	387076000	USD
CY2018	re	Causes Of Increase Decrease In Liability For Unpaid Claims And Claims Adjustment Expense Related To Reserves1 CausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseRelatedToReserves1	174121000	USD
CY2019Q4	us-gaap	Shortduration Insurance Contracts Liability For Unpaid Claims And Claims Adjustment Expense Accumulated Unallocated Claim Adjustment Expense ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAccumulatedUnallocatedClaimAdjustmentExpense	163563000	USD
CY2019Q4	us-gaap	Shortduration Insurance Contracts Liability For Unpaid Claims And Claim Adjustment Expense Other Reconciling Item ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimAdjustmentExpenseOtherReconcilingItem	38442000	USD
CY2019	us-gaap	Translation Adjustment Functional To Reporting Currency Net Of Tax Period Increase Decrease TranslationAdjustmentFunctionalToReportingCurrencyNetOfTaxPeriodIncreaseDecrease	51325000	USD
CY2017	us-gaap	Translation Adjustment Functional To Reporting Currency Net Of Tax Period Increase Decrease TranslationAdjustmentFunctionalToReportingCurrencyNetOfTaxPeriodIncreaseDecrease	170879000	USD
CY2019Q4	re	Reserve For Losses And Loss Adjustment Expenses Net ReserveForLossesAndLossAdjustmentExpensesNet	11970601000	USD
CY2018Q4	re	Reserve For Losses And Loss Adjustment Expenses Net ReserveForLossesAndLossAdjustmentExpensesNet	11499449000	USD
CY2017Q4	re	Reserve For Losses And Loss Adjustment Expenses Net ReserveForLossesAndLossAdjustmentExpensesNet	10671672000	USD
CY2019Q4	us-gaap	Reinsurance Recoverables ReinsuranceRecoverables	1640712000	USD
CY2018Q4	us-gaap	Reinsurance Recoverables ReinsuranceRecoverables	1619641000	USD
CY2017Q4	us-gaap	Reinsurance Recoverables ReinsuranceRecoverables	1212649000	USD
CY2019Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	13611313000	USD
CY2019Q4	us-gaap	Shortduration Insurance Contracts Liability For Unpaid Claims And Allocated Claim Adjustment Expense Net ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet	11768596000	USD
CY2019Q4	us-gaap	Reinsurance Recoverable For Unpaid Claims And Claims Adjustments ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments	1640712000	USD
CY2018Q4	us-gaap	Liability For Asbestos And Environmental Claims Gross LiabilityForAsbestosAndEnvironmentalClaimsGross	347495000	USD
CY2017Q4	us-gaap	Liability For Asbestos And Environmental Claims Gross LiabilityForAsbestosAndEnvironmentalClaimsGross	448994000	USD
CY2016Q4	us-gaap	Liability For Asbestos And Environmental Claims Gross LiabilityForAsbestosAndEnvironmentalClaimsGross	441111000	USD
CY2019	us-gaap	Liability For Asbestos And Environmental Claims Gross Incurred Loss1 LiabilityForAsbestosAndEnvironmentalClaimsGrossIncurredLoss1	2070000	USD
CY2018	us-gaap	Liability For Asbestos And Environmental Claims Gross Incurred Loss1 LiabilityForAsbestosAndEnvironmentalClaimsGrossIncurredLoss1	-2473000	USD
CY2017	us-gaap	Liability For Asbestos And Environmental Claims Gross Incurred Loss1 LiabilityForAsbestosAndEnvironmentalClaimsGrossIncurredLoss1	90009000	USD
CY2019	us-gaap	Liability For Asbestos And Environmental Claims Gross Payment For Claims LiabilityForAsbestosAndEnvironmentalClaimsGrossPaymentForClaims	91644000	USD
CY2018	us-gaap	Liability For Asbestos And Environmental Claims Gross Payment For Claims LiabilityForAsbestosAndEnvironmentalClaimsGrossPaymentForClaims	99026000	USD
CY2017	us-gaap	Liability For Asbestos And Environmental Claims Gross Payment For Claims LiabilityForAsbestosAndEnvironmentalClaimsGrossPaymentForClaims	82126000	USD
CY2019Q4	us-gaap	Liability For Asbestos And Environmental Claims Gross LiabilityForAsbestosAndEnvironmentalClaimsGross	257921000	USD
CY2018Q4	us-gaap	Liability For Asbestos And Environmental Claims Gross LiabilityForAsbestosAndEnvironmentalClaimsGross	347495000	USD
CY2017Q4	us-gaap	Liability For Asbestos And Environmental Claims Gross LiabilityForAsbestosAndEnvironmentalClaimsGross	448994000	USD
CY2019Q4	re	Deferred Tax Assets Investment Impairments DeferredTaxAssetsInvestmentImpairments	3961000	USD
CY2018Q4	re	Public Equity Portfolio Fair Value Disclosure PublicEquityPortfolioFairValueDisclosure	124228000	USD
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CY2017Q4	us-gaap	Liability For Asbestos And Environmental Claims Net LiabilityForAsbestosAndEnvironmentalClaimsNet	318081000	USD
CY2016Q4	us-gaap	Liability For Asbestos And Environmental Claims Net LiabilityForAsbestosAndEnvironmentalClaimsNet	319072000	USD
CY2017	us-gaap	Liability For Asbestos And Environmental Claims Net Incurred Loss1 LiabilityForAsbestosAndEnvironmentalClaimsNetIncurredLoss1	37137000	USD
CY2019	us-gaap	Liability For Asbestos And Environmental Claims Net Payment For Claims LiabilityForAsbestosAndEnvironmentalClaimsNetPaymentForClaims	32756000	USD
CY2018	us-gaap	Liability For Asbestos And Environmental Claims Net Payment For Claims LiabilityForAsbestosAndEnvironmentalClaimsNetPaymentForClaims	56624000	USD
CY2017	us-gaap	Liability For Asbestos And Environmental Claims Net Payment For Claims LiabilityForAsbestosAndEnvironmentalClaimsNetPaymentForClaims	38128000	USD
CY2019Q4	us-gaap	Liability For Asbestos And Environmental Claims Net LiabilityForAsbestosAndEnvironmentalClaimsNet	228701000	USD
CY2018Q4	us-gaap	Liability For Asbestos And Environmental Claims Net LiabilityForAsbestosAndEnvironmentalClaimsNet	261456000	USD
CY2017Q4	us-gaap	Liability For Asbestos And Environmental Claims Net LiabilityForAsbestosAndEnvironmentalClaimsNet	318081000	USD
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CY2015	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	140279000	USD
CY2015Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities	440279000	USD
CY2015	re	Total Amount Of Liabilities Retroceded TotalAmountOfLiabilitiesRetroceded	300000000	USD
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CY2019Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities	450298000	USD
CY2019Q4	us-gaap	Reinsurance Recoverables On Paid And Unpaid Losses ReinsuranceRecoverablesOnPaidAndUnpaidLosses	1763471000	USD
CY2018Q4	us-gaap	Reinsurance Recoverables On Paid And Unpaid Losses ReinsuranceRecoverablesOnPaidAndUnpaidLosses	1787648000	USD
CY2018Q4	us-gaap	Liability For Future Policy Benefits LiabilityForFuturePolicyBenefits	46778000	USD
CY2017Q4	us-gaap	Liability For Future Policy Benefits LiabilityForFuturePolicyBenefits	51014000	USD
CY2016Q4	us-gaap	Liability For Future Policy Benefits LiabilityForFuturePolicyBenefits	55074000	USD
CY2019	us-gaap	Liability For Future Policy Benefits Period Expense LiabilityForFuturePolicyBenefitsPeriodExpense	53000	USD
CY2018	us-gaap	Liability For Future Policy Benefits Period Expense LiabilityForFuturePolicyBenefitsPeriodExpense	110000	USD
CY2017	us-gaap	Liability For Future Policy Benefits Period Expense LiabilityForFuturePolicyBenefitsPeriodExpense	115000	USD
CY2019	us-gaap	Liability For Future Policy Benefits Period Increase Decrease LiabilityForFuturePolicyBenefitsPeriodIncreaseDecrease	350000	USD
CY2018	us-gaap	Liability For Future Policy Benefits Period Increase Decrease LiabilityForFuturePolicyBenefitsPeriodIncreaseDecrease	806000	USD
CY2017	us-gaap	Liability For Future Policy Benefits Period Increase Decrease LiabilityForFuturePolicyBenefitsPeriodIncreaseDecrease	-437000	USD
CY2019	us-gaap	Liability For Future Policy Benefits Payment For Benefits LiabilityForFuturePolicyBenefitsPaymentForBenefits	4589000	USD
CY2018	us-gaap	Liability For Future Policy Benefits Payment For Benefits LiabilityForFuturePolicyBenefitsPaymentForBenefits	5151000	USD
CY2017	us-gaap	Liability For Future Policy Benefits Payment For Benefits LiabilityForFuturePolicyBenefitsPaymentForBenefits	3738000	USD
CY2019Q4	us-gaap	Liability For Future Policy Benefits LiabilityForFuturePolicyBenefits	42592000	USD
CY2018Q4	us-gaap	Liability For Future Policy Benefits LiabilityForFuturePolicyBenefits	46778000	USD
CY2017Q4	us-gaap	Liability For Future Policy Benefits LiabilityForFuturePolicyBenefits	51014000	USD
CY2019Q4	re	Public Equity Portfolio Fair Value Disclosure PublicEquityPortfolioFairValueDisclosure	170888000	USD
CY2019Q4	re	Deferred Tax Assets Uncollectible Reinsurance DeferredTaxAssetsUncollectibleReinsurance	3142000	USD
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CY2018Q4	re	Deferred Tax Assets Uncollectible Reinsurance DeferredTaxAssetsUncollectibleReinsurance	3142000	USD
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CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Other DeferredTaxAssetsTaxCreditCarryforwardsOther	2294000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Trading Securities DeferredTaxAssetsUnrealizedLossesOnTradingSecurities	10815000	USD
CY2019Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	5584000	USD
CY2018	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	520000	USD
CY2018Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	11958000	USD
CY2019Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	931457000	USD
CY2019Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	5584000	USD
CY2018Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	11958000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	2337000	USD
CY2018Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	716639000	USD
CY2018Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	11958000	USD
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CY2018	us-gaap	Line Of Credit Facility Commitment Fee Amount LineOfCreditFacilityCommitmentFeeAmount	420000	USD
CY2019	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Net FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet	4695000	USD
CY2018	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Net FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet	2942000	USD
CY2019Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	47000000	GBP
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CY2017Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	12477000	USD
CY2019	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	6374000	USD
CY2019	us-gaap	Line Of Credit Facility Commitment Fee Amount LineOfCreditFacilityCommitmentFeeAmount	420000	USD
CY2017	us-gaap	Line Of Credit Facility Commitment Fee Amount LineOfCreditFacilityCommitmentFeeAmount	420000	USD
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CY2019Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	0	USD
CY2019	us-gaap	Interest Expense Debt InterestExpenseDebt	19472000	USD
CY2017	us-gaap	Interest Expense Debt InterestExpenseDebt	19472000	USD
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CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	777000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	18992000	USD
CY2018Q4	re	Deferred Tax Assets Fair Value Adjustments DeferredTaxAssetsFairValueAdjustments	7196000	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	2849000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	19945000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	17153000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	9376000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	18985000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	18169000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	17872000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	126250000	USD
CY2019	us-gaap	Debt Instrument Redemption Period End Date DebtInstrumentRedemptionPeriodEndDate	2047-05-01
CY2019	us-gaap	Interest Expense Subordinated Notes And Debentures InterestExpenseSubordinatedNotesAndDebentures	11587000	USD
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CY2017	us-gaap	Interest Expense Subordinated Notes And Debentures InterestExpenseSubordinatedNotesAndDebentures	11498000	USD
CY2019Q4	us-gaap	Security Deposit SecurityDeposit	989693000	USD
CY2019	us-gaap	Lease Cost LeaseCost	24524000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	161435000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	169909000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	20041000	USD
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0391	pure
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	218374000	USD
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CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	13869000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	18365000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	9469000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	169909000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	26916000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	9180000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	11521000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	8919000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	410607000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-32128000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-114324000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	80247000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-298998000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	50207000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-97000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-97000	USD
CY2019Q3	us-gaap	Area Of Real Estate Property AreaOfRealEstateProperty	315000	sqft
CY2019	re	Operating Lease Expense Expiration Date Year OperatingLeaseExpenseExpirationDateYear	2036
CY2019	re	Operating Lease Expense Monthly Lease OperatingLeaseExpenseMonthlyLease	650000	USD
CY2019	us-gaap	Operating Lease Expense OperatingLeaseExpense	7800000	USD
CY2019	re	Accrual Withholding Taxes Percent AccrualWithholdingTaxesPercent	0.05	pure
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-5044000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-38625000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-117173000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	14420000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	6497000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	80150000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-299095000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	50984000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	89526000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-331223000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-63340000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	8434000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	8434000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	4937000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	8434000	USD
CY2019Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	0	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	3868000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	186706000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	169589000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	167685000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	97140000	USD
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CY2019Q4	re	Deferred Tax Liabilities Deferred Expense Compensation And Benefits Pensions DeferredTaxLiabilitiesDeferredExpenseCompensationAndBenefitsPensions	2333000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Unearned Premiums Reserve DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve	63309000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Loss Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves	66025000	USD
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CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Loss Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves	64135000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	31698000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	8434000	USD
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CY2018Q4	re	Deferred Tax Assets Net Unrecognized Losses On Benefit Plans DeferredTaxAssetsNetUnrecognizedLossesOnBenefitPlans	17921000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Unrealized Currency Losses DeferredTaxAssetsUnrealizedCurrencyLosses	7964000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Unrealized Currency Losses DeferredTaxAssetsUnrealizedCurrencyLosses	12596000	USD
CY2018Q4	re	Deferred Tax Liabilities Deferred Expense Compensation And Benefits Pensions DeferredTaxLiabilitiesDeferredExpenseCompensationAndBenefitsPensions	3600000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	466154000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost	81931000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost	74736000	USD
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CY2019Q4	re	Deferred Tax Liabilities Fair Value Adjustments DeferredTaxLiabilitiesFairValueAdjustments	25936000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	15039000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	14936000	USD
CY2019Q4	re	Deferred Tax Assets Liabilities Net Before Valuation Allowance DeferredTaxAssetsLiabilitiesNetBeforeValuationAllowance	241018000	USD
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CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	12997000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	9309000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	228021000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	359705000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	186706000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	19027000	USD
CY2018	us-gaap	Tax Cuts And Jobs Act Of2017 Income Tax Expense Benefit TaxCutsAndJobsActOf2017IncomeTaxExpenseBenefit	-28411000	USD
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CY2017	us-gaap	Direct Premiums Written DirectPremiumsWritten	2083555000	USD
CY2019	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	6350328000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-134000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	57123000	USD
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CY2018	re	Aggregate Value Of Issuance Of Common Stock AggregateValueOfIssuanceOfCommonStock	113000	USD
CY2017	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	5090367000	USD
CY2019	us-gaap	Ceded Premiums Written CededPremiumsWritten	1308940000	USD
CY2017	re	Aggregate Value Of Issuance Of Common Stock AggregateValueOfIssuanceOfCommonStock	94000	USD
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CY2017	us-gaap	Ceded Premiums Written CededPremiumsWritten	929261000	USD
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CY2019	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	619086000	USD
CY2018	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	768133000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-300465000	USD
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CY2017	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	698917000	USD
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CY2019	us-gaap	Direct Premiums Earned DirectPremiumsEarned	2551662000	USD
CY2018	us-gaap	Direct Premiums Earned DirectPremiumsEarned	2129320000	USD
CY2017	us-gaap	Direct Premiums Earned DirectPremiumsEarned	1825705000	USD
CY2019	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	6059222000	USD
CY2018	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	5807332000	USD
CY2017	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	4945522000	USD
CY2019	us-gaap	Ceded Premiums Earned CededPremiumsEarned	1207198000	USD
CY2018	us-gaap	Ceded Premiums Earned CededPremiumsEarned	1004953000	USD
CY2017	us-gaap	Ceded Premiums Earned CededPremiumsEarned	833387000	USD
CY2019	us-gaap	Premiums Earned Net PremiumsEarnedNet	7403686000	USD
CY2018	us-gaap	Premiums Earned Net PremiumsEarnedNet	6931699000	USD
CY2017	us-gaap	Premiums Earned Net PremiumsEarnedNet	5937840000	USD
CY2019	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	1618686000	USD
CY2018	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	1372589000	USD
CY2017	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	1311682000	USD
CY2019	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	3923298000	USD
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CY2018	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	5651403000	USD
CY2017	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	4522581000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	542400000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	51691000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	490709000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-329378000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-28913000	USD
CY2019	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	4750000	USD
CY2019Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	32376000	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	360364	shares
CY2018	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	77743000	USD
CY2019Q2	re	Premiumwrittengross Premiumwrittengross	2166655000	USD
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P2Y8M12D
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	49428000	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	84.10
CY2017	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	10534000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	309970000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	262327000	USD
CY2019Q4	us-gaap	Short Term Investments ShortTermInvestments	1749000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents And Short Term Investments CashCashEquivalentsAndShortTermInvestments	281116000	USD
CY2018Q4	us-gaap	Short Term Investments ShortTermInvestments	2872000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents And Short Term Investments CashCashEquivalentsAndShortTermInvestments	240440000	USD
CY2019Q3	re	Premiumwrittengross Premiumwrittengross	2403274000	USD
CY2019	re	Expenses Incurred Under Defined Contribution Plans For Us Employees ExpensesIncurredUnderDefinedContributionPlansForUsEmployees	10794000	USD
CY2018	re	Expenses Incurred Under Defined Contribution Plans For Us Employees ExpensesIncurredUnderDefinedContributionPlansForUsEmployees	9301000	USD
CY2017	re	Expenses Incurred Under Defined Contribution Plans For Us Employees ExpensesIncurredUnderDefinedContributionPlansForUsEmployees	7167000	USD
CY2019	re	Defined Contribution Plan Employer Contribution Percentage For Branch Offices Minimum DefinedContributionPlanEmployerContributionPercentageForBranchOfficesMinimum	0.049	pure
CY2019	re	Defined Contribution Plan Employer Contribution Percentage For Branch Offices Maximum DefinedContributionPlanEmployerContributionPercentageForBranchOfficesMaximum	0.457	pure
CY2019	re	Expenses Incurred Under Defined Contribution Plans For Non Us Employees ExpensesIncurredUnderDefinedContributionPlansForNonUsEmployees	2216000	USD
CY2018	re	Expenses Incurred Under Defined Contribution Plans For Non Us Employees ExpensesIncurredUnderDefinedContributionPlansForNonUsEmployees	2057000	USD
CY2017	re	Expenses Incurred Under Defined Contribution Plans For Non Us Employees ExpensesIncurredUnderDefinedContributionPlansForNonUsEmployees	1849000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	8384000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	7401000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	14824000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	484000	USD
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P2Y8M12D
CY2018	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	403000	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	360364	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	84.10
CY2017	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	626000	USD
CY2019	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Service And Interest Cost Components DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents	434000	USD
CY2019	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Decrease On Service And Interest Cost Components1 DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1	335000	USD
CY2019	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Accumulated Postretirement Benefit Obligation DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation	6257000	USD
CY2019	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Decrease On Accumulated Postretirement Benefit Obligation1 DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1	4833000	USD
CY2019Q4	re	Minimum Solvency Margin MinimumSolvencyMargin	250000	USD
CY2019	re	Approval Of Authority For Dividend Payments Percentage Exceeds In Prior Year End Total Statutory Capital ApprovalOfAuthorityForDividendPaymentsPercentageExceedsInPriorYearEndTotalStatutoryCapital	0.25	pure
CY2019	re	Dividend Payment Restrictions Period DividendPaymentRestrictionsPeriod	P12M
CY2019	re	Dividend Payment Restrictions Percentage Of Statutory Surplus Required DividendPaymentRestrictionsPercentageOfStatutorySurplusRequired	0.10	pure
CY2019	re	Minimum Percent Of Total Adjusted Capital MinimumPercentOfTotalAdjustedCapital	2	pure
CY2019	re	Minimum Percent Of Total Adjusted Capital MinimumPercentOfTotalAdjustedCapital	2	pure
CY2019	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	34018000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	32369000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	30297000	USD
CY2019Q4	re	Premiumwrittengross Premiumwrittengross	2436327000	USD
CY2019Q1	us-gaap	Premiums Written Net PremiumsWrittenNet	1851698000	USD
CY2017Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	49428000	USD
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	279164	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	83.84
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	108460	shares
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	78.58
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	170704	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	87.18
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P1Y4M24D
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	32376000	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	170704	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	87.18
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P1Y4M24D
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	81200	shares
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	84.99
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	279164	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	83.84
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P1Y10M24D
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	37386000	USD
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	279164	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	83.84
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P1Y10M24D
CY2018Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	37386000	USD
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	454994	shares
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	84.88
CY2017	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	94630	shares
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	87.84
CY2019Q2	us-gaap	Premiums Written Net PremiumsWrittenNet	1783983000	USD
CY2018Q4	us-gaap	Premiums Written Net PremiumsWrittenNet	2057071000	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue	16297000	USD
CY2018Q1	us-gaap	Premiums Earned Net PremiumsEarnedNet	1619427000	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	360364	shares
CY2018Q2	us-gaap	Premiums Earned Net PremiumsEarnedNet	1729818000	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	84.10
CY2019Q3	us-gaap	Premiums Written Net PremiumsWrittenNet	2068557000	USD
CY2019Q4	us-gaap	Premiums Written Net PremiumsWrittenNet	2120186000	USD
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue	11737000	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue	14130000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	8523000	USD
CY2019	us-gaap	Deferred Tax Expense From Stock Options Exercised DeferredTaxExpenseFromStockOptionsExercised	3198000	USD
CY2019Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	170704	shares
CY2019	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2	P1Y4M24D
CY2019Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	87.18
CY2018Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	170704	shares
CY2018Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	87.18
CY2019	re	Unrecognized Compensation Cost Related To Non Vested Share Based Compensation Expense UnrecognizedCompensationCostRelatedToNonVestedShareBasedCompensationExpense	79780000	USD
CY2019	re	Unrecognized Compensation Cost Expected To Be Recognized Over Weighted Average Period UnrecognizedCompensationCostExpectedToBeRecognizedOverWeightedAveragePeriod	P3Y4M24D
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	28135000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	25317000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	23134000	USD
CY2019	re	Tax Benefit From Stock Options Vested TaxBenefitFromStockOptionsVested	5774000	USD
CY2019	us-gaap	Underwriting Income Loss UnderwritingIncomeLoss	336163000	USD
CY2018	us-gaap	Underwriting Income Loss UnderwritingIncomeLoss	-610275000	USD
CY2017	us-gaap	Underwriting Income Loss UnderwritingIncomeLoss	-207521000	USD
CY2019	us-gaap	Net Investment Income NetInvestmentIncome	647139000	USD
CY2018	us-gaap	Net Investment Income NetInvestmentIncome	581183000	USD
CY2017	us-gaap	Net Investment Income NetInvestmentIncome	542898000	USD
CY2019	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	185004000	USD
CY2018	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	-127136000	USD
CY2017	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	153194000	USD
CY2019	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	6374000	USD
CY2019Q1	us-gaap	Premiums Earned Net PremiumsEarnedNet	1732697000	USD
CY2018Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	1731479000	USD
CY2019Q2	us-gaap	Profit Loss ProfitLoss	332868000	USD
CY2018Q4	us-gaap	Premiums Earned Net PremiumsEarnedNet	1850975000	USD
CY2019Q2	us-gaap	Premiums Earned Net PremiumsEarnedNet	1817299000	USD
CY2018Q1	us-gaap	Net Investment Income NetInvestmentIncome	138294000	USD
CY2019Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	1905619000	USD
CY2018Q2	us-gaap	Net Investment Income NetInvestmentIncome	141322000	USD
CY2017	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	9581000	USD
CY2019	re	Corporate Expenses CorporateExpenses	32966000	USD
CY2018	re	Corporate Expenses CorporateExpenses	30672000	USD
CY2017	re	Corporate Expenses CorporateExpenses	25923000	USD
CY2019	us-gaap	Interest Expense InterestExpense	31693000	USD
CY2018	us-gaap	Interest Expense InterestExpense	31031000	USD
CY2017	us-gaap	Interest Expense InterestExpense	31603000	USD
CY2019	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-11034000	USD
CY2017	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-21215000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1098987000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	419411000	USD
CY2019	re	Percentage Threshold Of Company Revenue Not Exceeded By Any Other Country PercentageThresholdOfCompanyRevenueNotExceededByAnyOtherCountry	0.231	pure
CY2018	re	Percentage Threshold Of Company Revenue Not Exceeded By Any Other Country PercentageThresholdOfCompanyRevenueNotExceededByAnyOtherCountry	0.197	pure
CY2017	re	Percentage Threshold Of Company Revenue Not Exceeded By Any Other Country PercentageThresholdOfCompanyRevenueNotExceededByAnyOtherCountry	0.204	pure
CY2019Q1	re	Premiumwrittengross Premiumwrittengross	2127108000	USD
CY2019Q4	us-gaap	Premiums Earned Net PremiumsEarnedNet	1948071000	USD
CY2019Q1	us-gaap	Net Investment Income NetInvestmentIncome	140976000	USD
CY2019Q2	us-gaap	Net Investment Income NetInvestmentIncome	179028000	USD
CY2019Q3	us-gaap	Net Investment Income NetInvestmentIncome	181058000	USD
CY2019Q4	us-gaap	Net Investment Income NetInvestmentIncome	146077000	USD
CY2019Q1	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	92232000	USD
CY2019Q2	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	30272000	USD
CY2019Q3	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	-12943000	USD
CY2019Q4	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	75443000	USD
CY2019Q1	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1537009000	USD
CY2019Q2	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1620413000	USD
CY2019Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1933158000	USD
CY2019Q4	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1976943000	USD
CY2019Q1	us-gaap	Profit Loss ProfitLoss	354551000	USD
CY2018Q1	us-gaap	Profit Loss ProfitLoss	215186000	USD
CY2019Q3	us-gaap	Profit Loss ProfitLoss	104398000	USD
CY2018Q2	us-gaap	Profit Loss ProfitLoss	60787000	USD
CY2019Q4	us-gaap	Profit Loss ProfitLoss	217644000	USD
CY2018Q3	us-gaap	Net Investment Income NetInvestmentIncome	161363000	USD
CY2018Q4	us-gaap	Net Investment Income NetInvestmentIncome	140204000	USD
CY2018Q1	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	-24901000	USD
CY2018Q4	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	2481858000	USD
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	8.70
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	8.17
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.56
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.34
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	8.67
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	8.15
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.56
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.32
CY2018Q1	re	Premiumwrittengross Premiumwrittengross	1931607000	USD
CY2018Q2	re	Premiumwrittengross Premiumwrittengross	2066521000	USD
CY2018Q3	re	Premiumwrittengross Premiumwrittengross	2198664000	USD
CY2018Q4	re	Premiumwrittengross Premiumwrittengross	2278361000	USD
CY2018Q1	us-gaap	Premiums Written Net PremiumsWrittenNet	1672206000	USD
CY2018Q2	us-gaap	Premiums Written Net PremiumsWrittenNet	1746378000	USD
CY2018Q3	us-gaap	Premiums Written Net PremiumsWrittenNet	1938773000	USD
CY2018Q2	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	15776000	USD
CY2018Q3	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	54804000	USD
CY2018Q4	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	-172815000	USD
CY2018Q1	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1511100000	USD
CY2018Q2	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1817815000	USD
CY2018Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1731201000	USD
CY2018Q3	us-gaap	Profit Loss ProfitLoss	198381000	USD
CY2018Q4	us-gaap	Profit Loss ProfitLoss	-385313000	USD
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.26
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.49
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.87
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-9.58
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.23
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.48
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.84
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-9.58
CY2018Q4	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	2183183000	USD
CY2017Q4	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	1819775000	USD
CY2018Q4	us-gaap	Funds Held Under Reinsurance Agreements Asset FundsHeldUnderReinsuranceAgreementsAsset	435031000	USD
CY2017Q4	us-gaap	Funds Held Under Reinsurance Agreements Asset FundsHeldUnderReinsuranceAgreementsAsset	288635000	USD
CY2018Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	594487000	USD
CY2017Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	300340000	USD
CY2018Q4	us-gaap	Assets Assets	24750992000	USD
CY2017Q4	us-gaap	Assets Assets	23563296000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	9531433000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	9657412000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	482751000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	7860797000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-211424000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	8340736000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	24750992000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	23563296000	USD
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.18
CY2019Q2	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	2351107000	USD
CY2019Q1	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	2362263000	USD
CY2019Q2	us-gaap	Funds Held Under Reinsurance Agreements Asset FundsHeldUnderReinsuranceAgreementsAsset	487275000	USD
CY2019Q1	us-gaap	Funds Held Under Reinsurance Agreements Asset FundsHeldUnderReinsuranceAgreementsAsset	423211000	USD
CY2019Q2	us-gaap	Income Tax Receivable IncomeTaxReceivable	360718000	USD
CY2019Q1	us-gaap	Income Tax Receivable IncomeTaxReceivable	477851000	USD
CY2019Q2	us-gaap	Assets Assets	26340448000	USD
CY2019Q1	us-gaap	Assets Assets	25593151000	USD
CY2019Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	10104716000	USD
CY2019Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	9828847000	USD
CY2019Q2	us-gaap	Stockholders Equity StockholdersEquity	8836817000	USD
CY2019Q1	us-gaap	Stockholders Equity StockholdersEquity	8389273000	USD
CY2019Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	26340448000	USD
CY2019Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	25593151000	USD
CY2018	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-24771000	USD
CY2017	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-21215000	USD
CY2018	us-gaap	Revenues Revenues	7361495000	USD
CY2017	us-gaap	Revenues Revenues	6622298000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-242182000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	419411000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-331223000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-63340000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	89041000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	539874000	USD
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	11.77
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.17
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	11.70
CY2019Q2	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-18225000	USD
	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-21525000	USD
CY2019Q2	us-gaap	Revenues Revenues	2008727000	USD
	us-gaap	Revenues Revenues	3974563000	USD
CY2019Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	372345000	USD
CY2019Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	39477000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	99470000	USD
CY2019Q2	us-gaap	Profit Loss ProfitLoss	332868000	USD
	us-gaap	Profit Loss ProfitLoss	687419000	USD
CY2019Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	504077000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1105074000	USD
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	8.17
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	16.88
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	8.15
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	16.82
CY2019Q1	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-3300000	USD
CY2019Q1	us-gaap	Revenues Revenues	1965836000	USD
CY2019Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	414544000	USD
CY2019Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	59993000	USD
CY2019Q1	us-gaap	Profit Loss ProfitLoss	354551000	USD
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	8.70
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	8.67
CY2018Q2	us-gaap	Profit Loss ProfitLoss	60787000	USD
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.48
	us-gaap	Profit Loss ProfitLoss	275973000	USD
CY2018Q3	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-13408000	USD
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	6.71
CY2018Q1	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	17033000	USD
	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	174583000	USD
	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-2948000	USD
CY2018Q3	us-gaap	Revenues Revenues	1936463000	USD
	us-gaap	Revenues Revenues	5569919000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	189471000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	463237000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-8910000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-11117000	USD
CY2018Q3	us-gaap	Profit Loss ProfitLoss	198381000	USD
	us-gaap	Profit Loss ProfitLoss	474354000	USD
CY2018Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	173402000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	166129000	USD
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.87
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	11.61
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.84
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	11.55
CY2018Q2	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-6573000	USD
	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	10460000	USD
CY2018Q2	us-gaap	Revenues Revenues	1883330000	USD
	us-gaap	Revenues Revenues	3633456000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	51154000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	273766000	USD
CY2018Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-9633000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-2207000	USD
CY2018Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-42577000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-7273000	USD
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.49
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	6.75
CY2018Q1	us-gaap	Revenues Revenues	1750126000	USD
CY2018Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	222612000	USD
CY2018Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7426000	USD
CY2018Q1	us-gaap	Profit Loss ProfitLoss	215186000	USD
CY2018Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	35304000	USD
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.26
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.23
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	7860797000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	8340736000	USD
CY2019Q2	us-gaap	Stockholders Equity StockholdersEquity	8836817000	USD
CY2019Q1	us-gaap	Stockholders Equity StockholdersEquity	8389273000	USD
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	8289045000	USD
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	8289045000	USD
CY2018Q2	us-gaap	Stockholders Equity StockholdersEquity	8208613000	USD
CY2018Q2	us-gaap	Stockholders Equity StockholdersEquity	8208613000	USD
CY2018Q1	us-gaap	Stockholders Equity StockholdersEquity	8320552000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	89041000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	482751000	USD
CY2018	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	382987000	USD
CY2017	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	350446000	USD
CY2018	us-gaap	Increase Decrease In Funds Held Under Reinsurance Agreements IncreaseDecreaseInFundsHeldUnderReinsuranceAgreements	153627000	USD
CY2017	us-gaap	Increase Decrease In Funds Held Under Reinsurance Agreements IncreaseDecreaseInFundsHeldUnderReinsuranceAgreements	33220000	USD
CY2018	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	265065000	USD
CY2017	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	114077000	USD
	us-gaap	Profit Loss ProfitLoss	687419000	USD
CY2019Q1	us-gaap	Profit Loss ProfitLoss	354551000	USD
CY2019	us-gaap	Supplementary Insurance Information Amortization Of Deferred Policy Acquisition Costs SupplementaryInsuranceInformationAmortizationOfDeferredPolicyAcquisitionCosts	1703726000	USD
CY2019	us-gaap	Supplementary Insurance Information Premium Revenue SupplementaryInsuranceInformationPremiumRevenue	7403686000	USD
CY2019Q1	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	168377000	USD
	us-gaap	Increase Decrease In Funds Held Under Reinsurance Agreements IncreaseDecreaseInFundsHeldUnderReinsuranceAgreements	55421000	USD
CY2019Q1	us-gaap	Increase Decrease In Funds Held Under Reinsurance Agreements IncreaseDecreaseInFundsHeldUnderReinsuranceAgreements	-9353000	USD
	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-180126000	USD
CY2019Q1	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-91856000	USD
	us-gaap	Profit Loss ProfitLoss	474354000	USD
	us-gaap	Profit Loss ProfitLoss	275973000	USD
	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	257291000	USD
	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	123622000	USD
	us-gaap	Increase Decrease In Funds Held Under Reinsurance Agreements IncreaseDecreaseInFundsHeldUnderReinsuranceAgreements	73189000	USD
	us-gaap	Increase Decrease In Funds Held Under Reinsurance Agreements IncreaseDecreaseInFundsHeldUnderReinsuranceAgreements	75887000	USD
	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-57916000	USD
	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-43116000	USD
CY2018Q1	us-gaap	Profit Loss ProfitLoss	215186000	USD
CY2018Q1	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	61315000	USD
CY2018Q1	us-gaap	Increase Decrease In Funds Held Under Reinsurance Agreements IncreaseDecreaseInFundsHeldUnderReinsuranceAgreements	-94936000	USD
CY2018Q1	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-56006000	USD
CY2019Q4	us-gaap	Summary Of Investments Other Than Investments In Related Parties Cost SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCost	20278211000	USD
CY2019Q4	us-gaap	Summary Of Investments Other Than Investments In Related Parties Fair Value SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesFairValue	20748500000	USD
CY2019Q4	us-gaap	Summary Of Investments Other Than Investments In Related Parties Carrying Amount SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount	20748500000	USD
CY2019	re	Accumulated Other Comprehensive Income Loss Tax AccumulatedOtherComprehensiveIncomeLossTax	30996000	USD
CY2018	re	Accumulated Other Comprehensive Income Loss Tax AccumulatedOtherComprehensiveIncomeLossTax	-20697000	USD
CY2019Q4	us-gaap	Supplementary Insurance Information Deferred Policy Acquisition Costs SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts	581863000	USD
CY2019Q4	us-gaap	Supplementary Insurance Information Liability For Future Policy Benefits Losses Claims And Loss Expense Reserves SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves	13611313000	USD
CY2019Q4	us-gaap	Supplementary Insurance Information Unearned Premiums SupplementaryInsuranceInformationUnearnedPremiums	3056735000	USD
CY2019	us-gaap	Supplementary Insurance Information Net Investment Income SupplementaryInsuranceInformationNetInvestmentIncome	647139000	USD
CY2019	us-gaap	Supplementary Insurance Information Benefits Claims Losses And Settlement Expense SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense	4922898000	USD
CY2019	us-gaap	Supplementary Insurance Information Other Operating Expense SupplementaryInsuranceInformationOtherOperatingExpense	440899000	USD
CY2018Q4	us-gaap	Supplementary Insurance Information Deferred Policy Acquisition Costs SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts	511573000	USD
CY2018Q4	us-gaap	Supplementary Insurance Information Liability For Future Policy Benefits Losses Claims And Loss Expense Reserves SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves	13119090000	USD
CY2018Q4	us-gaap	Supplementary Insurance Information Unearned Premiums SupplementaryInsuranceInformationUnearnedPremiums	2517612000	USD
CY2018	us-gaap	Supplementary Insurance Information Premium Revenue SupplementaryInsuranceInformationPremiumRevenue	6931699000	USD
CY2018	us-gaap	Supplementary Insurance Information Benefits Claims Losses And Settlement Expense SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense	5651403000	USD
CY2018	us-gaap	Supplementary Insurance Information Amortization Of Deferred Policy Acquisition Costs SupplementaryInsuranceInformationAmortizationOfDeferredPolicyAcquisitionCosts	1519030000	USD
CY2018	us-gaap	Supplementary Insurance Information Other Operating Expense SupplementaryInsuranceInformationOtherOperatingExpense	371541000	USD
CY2018	us-gaap	Supplementary Insurance Information Premiums Written SupplementaryInsuranceInformationPremiumsWritten	7414428000	USD
CY2017Q4	us-gaap	Supplementary Insurance Information Deferred Policy Acquisition Costs SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts	411587000	USD
CY2017Q4	us-gaap	Supplementary Insurance Information Liability For Future Policy Benefits Losses Claims And Loss Expense Reserves SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves	11884321000	USD
CY2017Q4	us-gaap	Supplementary Insurance Information Unearned Premiums SupplementaryInsuranceInformationUnearnedPremiums	2000556000	USD
CY2017	us-gaap	Supplementary Insurance Information Premium Revenue SupplementaryInsuranceInformationPremiumRevenue	5937840000	USD
CY2017	us-gaap	Supplementary Insurance Information Benefits Claims Losses And Settlement Expense SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense	4522581000	USD
CY2017	us-gaap	Supplementary Insurance Information Amortization Of Deferred Policy Acquisition Costs SupplementaryInsuranceInformationAmortizationOfDeferredPolicyAcquisitionCosts	1303963000	USD
CY2017	us-gaap	Supplementary Insurance Information Premiums Written SupplementaryInsuranceInformationPremiumsWritten	6244661000	USD

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$EG
EVEREST GROUP, LTD. Stock $eg

2019 Q2 Form 10-K Financial Statement

#000109507320000006 Filed on March 02, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EG EVEREST GROUP, LTD. Stock $eg

2019 Q2 Form 10-K Financial Statement

#000109507320000006 Filed on March 02, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EG
EVEREST GROUP, LTD. Stock $eg