10-K Filing

MARKEL GROUP INC. CIK: 1096343 FY 2022

Filing Information

Form Type	10-K
Accession Number	`0001096343-23-000033`
Period End Date	20221231
Filing Date	20230217
Fiscal Year	2022
Fiscal Period	FY
XBRL Instance	mkl-20221231_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 72 Income Statement 102 Cash Flow Statement 122 Stockholders Equity 19

Balance Sheet 72 line items

Line Item	Tag	Value	Unit	Period
Fixed maturity securities, available-for-sale (amortized cost of $12,805,887 in 2022 and $12,061,467 in 2021)	`AvailableForSaleDebtSecuritiesAmortizedCostBasis`	$12.81B	USD	Point-in-time
Fixed maturity securities, available-for-sale (amortized cost of $12,805,887 in 2022 and $12,061,467 in 2021)	`AvailableForSaleDebtSecuritiesAmortizedCostBasis`	$12.06B	USD	Point-in-time
Equity securities (cost of $3,100,040 in 2022 and $2,867,899 in 2021)	`EquitySecuritiesFvNiCost`	$3.10B	USD	Point-in-time
Equity securities (cost of $3,100,040 in 2022 and $2,867,899 in 2021)	`EquitySecuritiesFvNiCost`	$2.87B	USD	Point-in-time
Fixed maturity securities, available-for-sale (amortized cost of $12,805,887 in 2022 and $12,061,467 in 2021)	`AvailableForSaleSecuritiesDebtSecurities`	$12.59B	USD	Point-in-time
Fixed maturity securities, available-for-sale (amortized cost of $12,805,887 in 2022 and $12,061,467 in 2021)	`AvailableForSaleSecuritiesDebtSecurities`	$11.86B	USD	Point-in-time
Senior long-term debt and other debt (estimated fair value of $3,541,000 in 2022 and $5,017,000 in 2021)	`LongTermDebtFairValue`	$3.54B	USD	Point-in-time
Equity securities (cost of $3,100,040 in 2022 and $2,867,899 in 2021)	`EquitySecuritiesFvNi`	$9.02B	USD	Point-in-time
Equity securities (cost of $3,100,040 in 2022 and $2,867,899 in 2021)	`EquitySecuritiesFvNi`	$7.67B	USD	Point-in-time
Senior long-term debt and other debt (estimated fair value of $3,541,000 in 2022 and $5,017,000 in 2021)	`LongTermDebtFairValue`	$5.02B	USD	Point-in-time
Short-term investments, available-for-sale (estimated fair value approximates cost)	`OtherShortTermInvestments`	$2.67B	USD	Point-in-time
Short-term investments, available-for-sale (estimated fair value approximates cost)	`OtherShortTermInvestments`	$1.80B	USD	Point-in-time
Total Investments	`Investments`	$22.20B	USD	Point-in-time
Total Investments	`Investments`	$23.41B	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$4.14B	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$3.98B	USD	Point-in-time
Restricted cash and cash equivalents	`RestrictedCashAndCashEquivalents`	$902.46M	USD	Point-in-time
Restricted cash and cash equivalents	`RestrictedCashAndCashEquivalents`	$1.08B	USD	Point-in-time
Receivables	`PremiumsAndOtherReceivablesNet`	$2.96B	USD	Point-in-time
Receivables	`PremiumsAndOtherReceivablesNet`	$2.41B	USD	Point-in-time
Reinsurance recoverables	`ReinsuranceRecoverablesOnPaidAndUnpaidLosses`	$7.29B	USD	Point-in-time
Reinsurance recoverables	`ReinsuranceRecoverablesOnPaidAndUnpaidLosses`	$8.45B	USD	Point-in-time
Deferred policy acquisition costs	`DeferredPolicyAcquisitionCosts`	$794.14M	USD	Point-in-time
Deferred policy acquisition costs	`DeferredPolicyAcquisitionCosts`	$925.48M	USD	Point-in-time
Prepaid reinsurance premiums	`PrepaidReinsurancePremiums`	$2.07B	USD	Point-in-time
Prepaid reinsurance premiums	`PrepaidReinsurancePremiums`	$1.80B	USD	Point-in-time
Goodwill	`Goodwill`	$2.90B	USD	Point-in-time
Goodwill	`Goodwill`	$2.60B	USD	Point-in-time
Goodwill	`Goodwill`	$2.64B	USD	Point-in-time
Intangible assets	`IntangibleAssetsNetExcludingGoodwill`	$1.78B	USD	Point-in-time
Intangible assets	`IntangibleAssetsNetExcludingGoodwill`	$1.82B	USD	Point-in-time
Intangible assets	`IntangibleAssetsNetExcludingGoodwill`	$1.75B	USD	Point-in-time
Other assets	`OtherAssets`	$3.16B	USD	Point-in-time
Other assets	`OtherAssets`	$3.59B	USD	Point-in-time
Total Assets	`Assets`	$48.48B	USD	Point-in-time
Total Assets	`Assets`	$49.79B	USD	Point-in-time
Unpaid losses and loss adjustment expenses	`LiabilityForClaimsAndClaimsAdjustmentExpense`	$20.95B	USD	Point-in-time
Unpaid losses and loss adjustment expenses	`LiabilityForClaimsAndClaimsAdjustmentExpense`	$14.73B	USD	Point-in-time
Unpaid losses and loss adjustment expenses	`LiabilityForClaimsAndClaimsAdjustmentExpense`	$18.18B	USD	Point-in-time
Unpaid losses and loss adjustment expenses	`LiabilityForClaimsAndClaimsAdjustmentExpense`	$16.22B	USD	Point-in-time
Life and annuity benefits	`LiabilityForFuturePolicyBenefits`	$902.98M	USD	Point-in-time
Life and annuity benefits	`LiabilityForFuturePolicyBenefits`	$759.02M	USD	Point-in-time
Unearned premiums	`UnearnedPremiums`	$5.38B	USD	Point-in-time
Unearned premiums	`UnearnedPremiums`	$6.22B	USD	Point-in-time
Payables to insurance and reinsurance companies	`ReinsurancePayable`	$669.74M	USD	Point-in-time
Payables to insurance and reinsurance companies	`ReinsurancePayable`	$616.66M	USD	Point-in-time
Senior long-term debt and other debt (estimated fair value of $3,541,000 in 2022 and $5,017,000 in 2021)	`LongTermDebt`	$4.36B	USD	Point-in-time
Senior long-term debt and other debt (estimated fair value of $3,541,000 in 2022 and $5,017,000 in 2021)	`LongTermDebt`	$4.10B	USD	Point-in-time
Other liabilities	`OtherLiabilities`	$3.44B	USD	Point-in-time
Other liabilities	`OtherLiabilities`	$3.83B	USD	Point-in-time
Total Liabilities	`Liabilities`	$33.28B	USD	Point-in-time
Total Liabilities	`Liabilities`	$36.14B	USD	Point-in-time
Redeemable noncontrolling interests	`RedeemableNoncontrollingInterestEquityCommonCarryingAmount`	$461.38M	USD	Point-in-time
Redeemable noncontrolling interests	`RedeemableNoncontrollingInterestEquityCommonCarryingAmount`	$523.15M	USD	Point-in-time
Commitments and contingencies	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and contingencies	`CommitmentsAndContingencies`	-	USD	Point-in-time
Preferred stock	`PreferredStockValue`	$591.89M	USD	Point-in-time
Preferred stock	`PreferredStockValue`	$591.89M	USD	Point-in-time
Common stock	`CommonStockValue`	$3.44B	USD	Point-in-time
Common stock	`CommonStockValue`	$3.49B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$10.45B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$9.84B	USD	Point-in-time
Accumulated other comprehensive income (loss)	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-857.08M	USD	Point-in-time
Accumulated other comprehensive income (loss)	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$237.62M	USD	Point-in-time
Total Shareholders' Equity	`StockholdersEquity`	$14.72B	USD	Point-in-time
Total Shareholders' Equity	`StockholdersEquity`	$13.07B	USD	Point-in-time
Noncontrolling interests	`MinorityInterest`	$22.86M	USD	Point-in-time
Noncontrolling interests	`MinorityInterest`	$62.79M	USD	Point-in-time
Total Equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$13.13B	USD	Point-in-time
Total Equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$14.74B	USD	Point-in-time
Total Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$48.48B	USD	Point-in-time
Total Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$49.79B	USD	Point-in-time

Income Statement 102 line items

Line Item	Tag	Value	Unit	Period
Earned premiums	`PremiumsEarnedNet`	$5.61B	USD	Annual
Earned premiums	`PremiumsEarnedNet`	$6.50B	USD	Annual
Earned premiums	`PremiumsEarnedNet`	$7.59B	USD	Annual
Net investment income	`NetInvestmentIncome`	$446.75M	USD	Annual
Net investment income	`NetInvestmentIncome`	$375.83M	USD	Annual
Net investment income	`NetInvestmentIncome`	$367.42M	USD	Annual
Net investment gains (losses)	`NetInvestmentGainsLosses`	$617.98M	USD	Annual
Net investment gains (losses)	`NetInvestmentGainsLosses`	$-1.60B	USD	Annual
Net investment gains (losses)	`NetInvestmentGainsLosses`	$1.98B	USD	Annual
Products revenues	`ProductsRevenues`	$1.44B	USD	Annual
Products revenues	`ProductsRevenues`	$2.43B	USD	Annual
Products revenues	`ProductsRevenues`	$1.71B	USD	Annual
Services and other revenues	`Servicesandotherrevenues`	$2.81B	USD	Annual
Services and other revenues	`Servicesandotherrevenues`	$2.29B	USD	Annual
Services and other revenues	`Servicesandotherrevenues`	$1.69B	USD	Annual
Total Operating Revenues	`Revenues`	$11.68B	USD	Annual
Total Operating Revenues	`Revenues`	$9.74B	USD	Annual
Total Operating Revenues	`Revenues`	$12.85B	USD	Annual
Losses and loss adjustment expenses	`IncurredClaimsPropertyCasualtyAndLiability`	$4.45B	USD	Annual
Losses and loss adjustment expenses	`IncurredClaimsPropertyCasualtyAndLiability`	$3.58B	USD	Annual
Losses and loss adjustment expenses	`IncurredClaimsPropertyCasualtyAndLiability`	$3.47B	USD	Annual
Underwriting, acquisition and insurance expenses	`UnderwritingAcquisitionAndInsuranceExpenses`	$2.02B	USD	Annual
Underwriting, acquisition and insurance expenses	`UnderwritingAcquisitionAndInsuranceExpenses`	$2.29B	USD	Annual
Underwriting, acquisition and insurance expenses	`UnderwritingAcquisitionAndInsuranceExpenses`	$2.52B	USD	Annual
Products expenses	`Productsexpenses`	$2.24B	USD	Annual
Products expenses	`Productsexpenses`	$1.54B	USD	Annual
Products expenses	`Productsexpenses`	$1.26B	USD	Annual
Services and other expenses	`Servicesandotherexpenses`	$2.02B	USD	Annual
Services and other expenses	`Servicesandotherexpenses`	$1.56B	USD	Annual
Services and other expenses	`Servicesandotherexpenses`	$2.31B	USD	Annual
Amortization of intangible assets	`AmortizationOfIntangibleAssets`	$159.31M	USD	Annual
Amortization of intangible assets	`AmortizationOfIntangibleAssets`	$178.78M	USD	Annual
Amortization of intangible assets	`AmortizationOfIntangibleAssets`	$160.54M	USD	Annual
Impairment of goodwill	`GoodwillAndIntangibleAssetImpairment`	$80.00M	USD	Annual
Impairment of goodwill	`GoodwillAndIntangibleAssetImpairment`	-	USD	Annual
Impairment of goodwill	`GoodwillAndIntangibleAssetImpairment`	-	USD	Annual
Total Operating Expenses	`CostsAndExpenses`	$11.77B	USD	Annual
Total Operating Expenses	`CostsAndExpenses`	$8.46B	USD	Annual
Total Operating Expenses	`CostsAndExpenses`	$9.60B	USD	Annual
Operating Income (Loss)	`OperatingIncomeLoss`	$-92.99M	USD	Annual
Operating Income (Loss)	`OperatingIncomeLoss`	$3.24B	USD	Annual
Operating Income (Loss)	`OperatingIncomeLoss`	$1.27B	USD	Annual
Interest expense	`InterestExpense`	$177.58M	USD	Annual
Interest expense	`InterestExpense`	$183.58M	USD	Annual
Interest expense	`InterestExpense`	$196.06M	USD	Annual
Net foreign exchange gains (losses)	`ForeignCurrencyTransactionGainLossRealized`	$72.27M	USD	Annual
Net foreign exchange gains (losses)	`ForeignCurrencyTransactionGainLossRealized`	$-95.85M	USD	Annual
Net foreign exchange gains (losses)	`ForeignCurrencyTransactionGainLossRealized`	$140.21M	USD	Annual
Income (Loss) Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$-148.84M	USD	Annual
Income (Loss) Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$3.13B	USD	Annual
Income (Loss) Before Income Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$1.00B	USD	Annual
Income tax (expense) benefit	`IncomeTaxExpenseBenefit`	$-47.64M	USD	Annual
Income tax (expense) benefit	`IncomeTaxExpenseBenefit`	$684.46M	USD	Annual
Income tax (expense) benefit	`IncomeTaxExpenseBenefit`	$168.68M	USD	Annual
Net Income (Loss)	`ProfitLoss`	$-101.20M	USD	Annual
Net Income (Loss)	`ProfitLoss`	$831.77M	USD	Annual
Net Income (Loss)	`ProfitLoss`	$2.45B	USD	Annual
Net income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$15.74M	USD	Annual
Net income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$22.73M	USD	Annual
Net income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$112.92M	USD	Annual
Net Income (Loss) to Shareholders	`NetIncomeLoss`	$2.43B	USD	Annual
Net Income (Loss) to Shareholders	`NetIncomeLoss`	$816.03M	USD	Annual
Net Income (Loss) to Shareholders	`NetIncomeLoss`	$-214.12M	USD	Annual
Preferred stock dividends	`PreferredStockDividendsIncomeStatementImpact`	$36.00M	USD	Annual
Preferred stock dividends	`PreferredStockDividendsIncomeStatementImpact`	$36.00M	USD	Annual
Preferred stock dividends	`PreferredStockDividendsIncomeStatementImpact`	$18.40M	USD	Annual
Net Income (Loss) to Common Shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$2.39B	USD	Annual
Net Income (Loss) to Common Shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$-250.12M	USD	Annual
Net Income (Loss) to Common Shareholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$797.63M	USD	Annual
Net holding gains (losses) arising during the period	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax`	$-348.31M	USD	Annual
Net holding gains (losses) arising during the period	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax`	$-1.16B	USD	Annual
Net holding gains (losses) arising during the period	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax`	$356.16M	USD	Annual
Reclassification adjustments for net gains (losses) included in net income (loss)	`ReclassificationAdjustmentsForNetGainsLossesIncludedInNetIncomeLoss`	$-44.91M	USD	Annual
Reclassification adjustments for net gains (losses) included in net income (loss)	`ReclassificationAdjustmentsForNetGainsLossesIncludedInNetIncomeLoss`	$3.39M	USD	Annual
Reclassification adjustments for net gains (losses) included in net income (loss)	`ReclassificationAdjustmentsForNetGainsLossesIncludedInNetIncomeLoss`	$6.62M	USD	Annual
Change in net unrealized gains (losses) on available-for-sale investments, net of taxes	`OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax`	$352.77M	USD	Annual
Change in net unrealized gains (losses) on available-for-sale investments, net of taxes	`OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax`	$-354.94M	USD	Annual
Change in net unrealized gains (losses) on available-for-sale investments, net of taxes	`OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax`	$-1.11B	USD	Annual
Change in foreign currency translation adjustments, net of taxes	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$-9.26M	USD	Annual
Change in foreign currency translation adjustments, net of taxes	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$29.85M	USD	Annual
Change in foreign currency translation adjustments, net of taxes	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$-213.00K	USD	Annual
Change in net actuarial pension loss, net of taxes	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-8.39M	USD	Annual
Change in net actuarial pension loss, net of taxes	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-24.73M	USD	Annual
Change in net actuarial pension loss, net of taxes	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$7.00M	USD	Annual
Total Other Comprehensive Income (Loss)	`OtherComprehensiveIncomeLossNetOfTax`	$-346.76M	USD	Annual
Total Other Comprehensive Income (Loss)	`OtherComprehensiveIncomeLossNetOfTax`	$-1.09B	USD	Annual
Total Other Comprehensive Income (Loss)	`OtherComprehensiveIncomeLossNetOfTax`	$375.62M	USD	Annual
Comprehensive Income (Loss)	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$-1.20B	USD	Annual
Comprehensive Income (Loss)	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$2.10B	USD	Annual
Comprehensive Income (Loss)	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$1.21B	USD	Annual
Comprehensive income attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$22.73M	USD	Annual
Comprehensive income attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$15.76M	USD	Annual
Comprehensive income attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$112.94M	USD	Annual
Comprehensive Income (Loss) to Shareholders	`ComprehensiveIncomeNetOfTax`	$-1.31B	USD	Annual
Comprehensive Income (Loss) to Shareholders	`ComprehensiveIncomeNetOfTax`	$1.19B	USD	Annual
Comprehensive Income (Loss) to Shareholders	`ComprehensiveIncomeNetOfTax`	$2.08B	USD	Annual
Basic (dollars per share)	`EarningsPerShareBasic`	$-23.57	USD	Annual
Basic (dollars per share)	`EarningsPerShareBasic`	$55.67	USD	Annual
Basic (dollars per share)	`EarningsPerShareBasic`	$176.92	USD	Annual
Diluted (dollars per share)	`EarningsPerShareDiluted`	$176.51	USD	Annual
Diluted (dollars per share)	`EarningsPerShareDiluted`	$-23.57	USD	Annual
Diluted (dollars per share)	`EarningsPerShareDiluted`	$55.63	USD	Annual

Cash Flow Statement 122 line items

Line Item	Tag	Value	Unit	Period
Net income (loss)	`ProfitLoss`	$-101.20M	USD	Annual
Net income (loss)	`ProfitLoss`	$831.77M	USD	Annual
Net income (loss)	`ProfitLoss`	$2.45B	USD	Annual
Deferred income tax expense (benefit)	`IncreaseDecreaseInDeferredIncomeTaxes`	$281.75M	USD	Annual
Deferred income tax expense (benefit)	`IncreaseDecreaseInDeferredIncomeTaxes`	$2.73M	USD	Annual
Deferred income tax expense (benefit)	`IncreaseDecreaseInDeferredIncomeTaxes`	$-453.90M	USD	Annual
Depreciation and amortization	`DepreciationAmortizationAndAccretionNet`	$366.95M	USD	Annual
Depreciation and amortization	`DepreciationAmortizationAndAccretionNet`	$336.39M	USD	Annual
Depreciation and amortization	`DepreciationAmortizationAndAccretionNet`	$307.07M	USD	Annual
Net investment losses (gains)	`RealizedInvestmentGainsLosses`	$1.98B	USD	Annual
Net investment losses (gains)	`RealizedInvestmentGainsLosses`	$-1.60B	USD	Annual
Net investment losses (gains)	`RealizedInvestmentGainsLosses`	$617.98M	USD	Annual
Net foreign exchange losses (gains)	`ForeignCurrencyTransactionGainLossRealized`	$72.27M	USD	Annual
Net foreign exchange losses (gains)	`ForeignCurrencyTransactionGainLossRealized`	$-95.85M	USD	Annual
Net foreign exchange losses (gains)	`ForeignCurrencyTransactionGainLossRealized`	$140.21M	USD	Annual
Gain on sale of businesses, net	`GainLossOnSaleOfBusiness`	$22.09M	USD	Annual
Gain on sale of businesses, net	`GainLossOnSaleOfBusiness`	$225.83M	USD	Annual
Gain on sale of businesses, net	`GainLossOnSaleOfBusiness`	-	USD	Annual
Impairment of goodwill	`GoodwillAndIntangibleAssetImpairment`	$80.00M	USD	Annual
Impairment of goodwill	`GoodwillAndIntangibleAssetImpairment`	-	USD	Annual
Impairment of goodwill	`GoodwillAndIntangibleAssetImpairment`	-	USD	Annual
Increase in receivables	`IncreaseDecreaseInReceivables`	$653.26M	USD	Annual
Increase in receivables	`IncreaseDecreaseInReceivables`	$372.49M	USD	Annual
Increase in receivables	`IncreaseDecreaseInReceivables`	$28.17M	USD	Annual
Increase in reinsurance recoverables	`IncreaseDecreaseInReinsuranceRecoverable`	$1.31B	USD	Annual
Increase in reinsurance recoverables	`IncreaseDecreaseInReinsuranceRecoverable`	$1.17B	USD	Annual
Increase in reinsurance recoverables	`IncreaseDecreaseInReinsuranceRecoverable`	$549.65M	USD	Annual
Increase in deferred policy acquisition costs	`IncreaseDecreaseInDeferredPolicyAcquisitionCosts`	$140.63M	USD	Annual
Increase in deferred policy acquisition costs	`IncreaseDecreaseInDeferredPolicyAcquisitionCosts`	$139.61M	USD	Annual
Increase in deferred policy acquisition costs	`IncreaseDecreaseInDeferredPolicyAcquisitionCosts`	$61.57M	USD	Annual
Increase in prepaid reinsurance premiums	`IncreaseDecreaseInPrepaidReinsurancePremiums`	$347.98M	USD	Annual
Increase in prepaid reinsurance premiums	`IncreaseDecreaseInPrepaidReinsurancePremiums`	$271.29M	USD	Annual
Increase in prepaid reinsurance premiums	`IncreaseDecreaseInPrepaidReinsurancePremiums`	$34.48M	USD	Annual
Increase in unpaid losses and loss adjustment expenses	`IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve`	$2.38B	USD	Annual
Increase in unpaid losses and loss adjustment expenses	`IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve`	$1.38B	USD	Annual
Increase in unpaid losses and loss adjustment expenses	`IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve`	$2.04B	USD	Annual
Decrease in life and annuity benefits	`IncreaseDecreaseInLifeInsuranceLiabilities`	$-44.65M	USD	Annual
Decrease in life and annuity benefits	`IncreaseDecreaseInLifeInsuranceLiabilities`	$-54.59M	USD	Annual
Decrease in life and annuity benefits	`IncreaseDecreaseInLifeInsuranceLiabilities`	$-47.42M	USD	Annual
Increase in unearned premiums	`IncreaseDecreaseInUnearnedPremiums`	$970.25M	USD	Annual
Increase in unearned premiums	`IncreaseDecreaseInUnearnedPremiums`	$886.39M	USD	Annual
Increase in unearned premiums	`IncreaseDecreaseInUnearnedPremiums`	$354.68M	USD	Annual
Increase in payables to insurance and reinsurance companies	`IncreaseDecreaseInReinsurancePayables`	$131.56M	USD	Annual
Increase in payables to insurance and reinsurance companies	`IncreaseDecreaseInReinsurancePayables`	$76.59M	USD	Annual
Increase in payables to insurance and reinsurance companies	`IncreaseDecreaseInReinsurancePayables`	$210.81M	USD	Annual
Other	`IncreaseDecreaseInOtherOperatingCapitalNet`	$-216.37M	USD	Annual
Other	`IncreaseDecreaseInOtherOperatingCapitalNet`	$-27.44M	USD	Annual
Other	`IncreaseDecreaseInOtherOperatingCapitalNet`	$-191.56M	USD	Annual
Net Cash Provided By Operating Activities	`NetCashProvidedByUsedInOperatingActivities`	$2.27B	USD	Annual
Net Cash Provided By Operating Activities	`NetCashProvidedByUsedInOperatingActivities`	$2.71B	USD	Annual
Net Cash Provided By Operating Activities	`NetCashProvidedByUsedInOperatingActivities`	$1.74B	USD	Annual
Proceeds from sales, maturities, calls and prepayments of fixed maturity securities	`ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities`	$862.33M	USD	Annual
Proceeds from sales, maturities, calls and prepayments of fixed maturity securities	`ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities`	$708.11M	USD	Annual
Proceeds from sales, maturities, calls and prepayments of fixed maturity securities	`ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities`	$1.15B	USD	Annual
Cost of fixed maturity securities purchased	`PaymentsToAcquireAvailableForSaleSecuritiesDebt`	$3.17B	USD	Annual
Cost of fixed maturity securities purchased	`PaymentsToAcquireAvailableForSaleSecuritiesDebt`	$2.11B	USD	Annual
Cost of fixed maturity securities purchased	`PaymentsToAcquireAvailableForSaleSecuritiesDebt`	$1.13B	USD	Annual
Proceeds from sales of equity securities	`ProceedsFromSaleOfEquitySecuritiesFvNi`	$242.01M	USD	Annual
Proceeds from sales of equity securities	`ProceedsFromSaleOfEquitySecuritiesFvNi`	$200.57M	USD	Annual
Proceeds from sales of equity securities	`ProceedsFromSaleOfEquitySecuritiesFvNi`	$1.36B	USD	Annual
Cost of equity securities purchased	`PaymentsToAcquireEquitySecuritiesFvNi`	$442.99M	USD	Annual
Cost of equity securities purchased	`PaymentsToAcquireEquitySecuritiesFvNi`	$255.44M	USD	Annual
Cost of equity securities purchased	`PaymentsToAcquireEquitySecuritiesFvNi`	$192.44M	USD	Annual
Net change in short-term investments	`PaymentsForProceedsFromShortTermInvestments`	$-228.96M	USD	Annual
Net change in short-term investments	`PaymentsForProceedsFromShortTermInvestments`	$846.02M	USD	Annual
Net change in short-term investments	`PaymentsForProceedsFromShortTermInvestments`	$829.46M	USD	Annual
Additions to property and equipment	`PaymentsToAcquirePropertyPlantAndEquipment`	$145.25M	USD	Annual
Additions to property and equipment	`PaymentsToAcquirePropertyPlantAndEquipment`	$254.71M	USD	Annual
Additions to property and equipment	`PaymentsToAcquirePropertyPlantAndEquipment`	$101.30M	USD	Annual
Acquisitions, net of cash acquired	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$554.13M	USD	Annual
Acquisitions, net of cash acquired	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$517.44M	USD	Annual
Acquisitions, net of cash acquired	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$79.00M	USD	Annual
Consolidation of Markel CATCo Re, net	`ConsolidationOfMarkelCATCoReNet`	-	USD	Annual
Consolidation of Markel CATCo Re, net	`ConsolidationOfMarkelCATCoReNet`	-	USD	Annual
Consolidation of Markel CATCo Re, net	`ConsolidationOfMarkelCATCoReNet`	$629.96M	USD	Annual
Distributions to Markel CATCo Re noncontrolling interests for buy-out transaction	`DistributionsToMarkelCATCoReNoncontrollingInterestsForBuyOutTransaction`	-	USD	Annual
Distributions to Markel CATCo Re noncontrolling interests for buy-out transaction	`DistributionsToMarkelCATCoReNoncontrollingInterestsForBuyOutTransaction`	-	USD	Annual
Distributions to Markel CATCo Re noncontrolling interests for buy-out transaction	`DistributionsToMarkelCATCoReNoncontrollingInterestsForBuyOutTransaction`	$169.38M	USD	Annual
Proceeds from sale of businesses, net	`ProceedsFromDivestitureOfBusinessesNetOfCashDivested`	-	USD	Annual
Proceeds from sale of businesses, net	`ProceedsFromDivestitureOfBusinessesNetOfCashDivested`	$201.37M	USD	Annual
Proceeds from sale of businesses, net	`ProceedsFromDivestitureOfBusinessesNetOfCashDivested`	$40.72M	USD	Annual
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$-32.71M	USD	Annual
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$8.29M	USD	Annual
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$72.93M	USD	Annual
Net Cash Used By Investing Activities	`NetCashProvidedByUsedInInvestingActivities`	$-1.67B	USD	Annual
Net Cash Used By Investing Activities	`NetCashProvidedByUsedInInvestingActivities`	$-2.94B	USD	Annual
Net Cash Used By Investing Activities	`NetCashProvidedByUsedInInvestingActivities`	$-511.75M	USD	Annual
Additions to senior long-term debt and other debt	`ProceedsFromIssuanceOfDebt`	$1.03B	USD	Annual
Additions to senior long-term debt and other debt	`ProceedsFromIssuanceOfDebt`	$223.18M	USD	Annual
Additions to senior long-term debt and other debt	`ProceedsFromIssuanceOfDebt`	$1.20B	USD	Annual
Repayment of senior long-term debt and other debt	`RepaymentsOfDebt`	$486.73M	USD	Annual
Repayment of senior long-term debt and other debt	`RepaymentsOfDebt`	$1.26B	USD	Annual
Repayment of senior long-term debt and other debt	`RepaymentsOfDebt`	$276.00M	USD	Annual
Repurchases of common stock	`PaymentsForRepurchaseOfCommonStock`	$206.52M	USD	Annual
Repurchases of common stock	`PaymentsForRepurchaseOfCommonStock`	$26.83M	USD	Annual
Repurchases of common stock	`PaymentsForRepurchaseOfCommonStock`	$290.80M	USD	Annual
Issuance of preferred stock, net	`ProceedsFromIssuanceOfPreferredStockAndPreferenceStock`	$591.89M	USD	Annual
Issuance of preferred stock, net	`ProceedsFromIssuanceOfPreferredStockAndPreferenceStock`	-	USD	Annual
Issuance of preferred stock, net	`ProceedsFromIssuanceOfPreferredStockAndPreferenceStock`	-	USD	Annual
Dividends paid on preferred stock	`PaymentsOfDividendsPreferredStockAndPreferenceStock`	$36.00M	USD	Annual
Dividends paid on preferred stock	`PaymentsOfDividendsPreferredStockAndPreferenceStock`	$36.00M	USD	Annual
Dividends paid on preferred stock	`PaymentsOfDividendsPreferredStockAndPreferenceStock`	$18.40M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-47.56M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-99.49M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-59.29M	USD	Annual
Net Cash Provided (Used) By Financing Activities	`NetCashProvidedByUsedInFinancingActivities`	$434.56M	USD	Annual
Net Cash Provided (Used) By Financing Activities	`NetCashProvidedByUsedInFinancingActivities`	$369.77M	USD	Annual
Net Cash Provided (Used) By Financing Activities	`NetCashProvidedByUsedInFinancingActivities`	$-595.31M	USD	Annual
Effect of foreign currency rate changes on cash, cash equivalents, restricted cash and restricted cash equivalents	`EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$-41.73M	USD	Annual
Effect of foreign currency rate changes on cash, cash equivalents, restricted cash and restricted cash equivalents	`EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$-103.36M	USD	Annual
Effect of foreign currency rate changes on cash, cash equivalents, restricted cash and restricted cash equivalents	`EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$55.90M	USD	Annual
Increase (decrease) in cash, cash equivalents, restricted cash and restricted cash equivalents	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$-335.70M	USD	Annual
Increase (decrease) in cash, cash equivalents, restricted cash and restricted cash equivalents	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$1.72B	USD	Annual
Increase (decrease) in cash, cash equivalents, restricted cash and restricted cash equivalents	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$340.57M	USD	Annual
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$4.88B	USD	Point-in-time
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$5.22B	USD	Point-in-time
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$5.22B	USD	Point-in-time
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$3.50B	USD	Point-in-time
CASH, CASH EQUIVALENTS, RESTRICTED CASH AND RESTRICTED CASH EQUIVALENTS AT END OF YEAR	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$4.88B	USD	Point-in-time
CASH, CASH EQUIVALENTS, RESTRICTED CASH AND RESTRICTED CASH EQUIVALENTS AT END OF YEAR	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$5.22B	USD	Point-in-time
CASH, CASH EQUIVALENTS, RESTRICTED CASH AND RESTRICTED CASH EQUIVALENTS AT END OF YEAR	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$5.22B	USD	Point-in-time
CASH, CASH EQUIVALENTS, RESTRICTED CASH AND RESTRICTED CASH EQUIVALENTS AT END OF YEAR	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$3.50B	USD	Point-in-time

Stockholders Equity 19 line items

Line Item	Tag	Value	Unit	Period
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$13.13B	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$14.74B	USD	Point-in-time
Balance, redeemable noncontrolling interests	`RedeemableNoncontrollingInterestEquityCommonCarryingAmount`	$461.38M	USD	Point-in-time
Balance, redeemable noncontrolling interests	`RedeemableNoncontrollingInterestEquityCommonCarryingAmount`	$523.15M	USD	Point-in-time
Net income (loss)	`ProfitLoss`	$-101.20M	USD	Annual
Net income (loss)	`ProfitLoss`	$831.77M	USD	Annual
Net income (loss)	`ProfitLoss`	$2.45B	USD	Annual
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$-346.76M	USD	Annual
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$-1.09B	USD	Annual
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$375.62M	USD	Annual
Comprehensive Income (Loss)	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$-1.20B	USD	Annual
Comprehensive Income (Loss)	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$2.10B	USD	Annual
Comprehensive Income (Loss)	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$1.21B	USD	Annual
Preferred stock dividends	`DividendsPreferredStock`	$36.00M	USD	Annual
Preferred stock dividends	`DividendsPreferredStock`	$36.00M	USD	Annual
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$13.13B	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$14.74B	USD	Point-in-time
Balance, redeemable noncontrolling interests	`RedeemableNoncontrollingInterestEquityCommonCarryingAmount`	$461.38M	USD	Point-in-time
Balance, redeemable noncontrolling interests	`RedeemableNoncontrollingInterestEquityCommonCarryingAmount`	$523.15M	USD	Point-in-time

Data is extracted from SEC EDGAR XBRL filings. Values shown are as reported in the filing.