REGN


Line plots across dimensions of each concept
Line plots across concepts
Tables

Table of contents


us-gaap:StatementClassOfStock
us-gaap:CommonStockValue
us-gaap:StatementClassOfStock
us-gaap:SharesOutstanding
us-gaap:StatementEquityComponents

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:ComprehensiveIncomeNetOfTax
us-gaap:ProductOrService
us-gaap:CostOfGoodsAndServicesSold
us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

us-gaap:CostsAndExpenses

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeTaxExpenseBenefit

us-gaap:InterestExpense
us-gaap:LongtermDebtType
us-gaap:InterestExpenseDebt

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NonoperatingIncomeExpense

us-gaap:OperatingIncomeLoss

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:ResearchAndDevelopmentExpense
us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
us-gaap:ProductOrService, us-gaap:StatementGeographical, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
regn:SalesMilestones, us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
us-gaap:ProductOrService
us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject, us-gaap:IncomeStatementLocation
us-gaap:ProductOrService, us-gaap:StatementGeographical
us-gaap:ProductOrService, us-gaap:StatementGeographical, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
us-gaap:ProductOrService, us-gaap:StatementGeographical, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject, us-gaap:IncomeStatementLocation
us-gaap:StatementGeographical

us-gaap:Revenues

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:Assets

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementClassOfStock
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:MarketableSecuritiesCurrent

us-gaap:AccountsReceivableNetCurrent
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

us-gaap:InventoryNet

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:OtherAssetsNoncurrent
regn:ClassificationOfInvestment, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:EquitySecuritiesFvNi
regn:ClassificationOfInvestment, us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency
regn:ClassificationOfInvestment, us-gaap:FairValueByMeasurementFrequency

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent

us-gaap:AccountsPayableCurrent

us-gaap:ContractWithCustomerLiabilityCurrent
us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

us-gaap:LiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent

us-gaap:TaxesPayableCurrent
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongTermDebt
us-gaap:LongtermDebtType

us-gaap:LongTermDebtNoncurrent

us-gaap:OtherLiabilitiesNoncurrent
us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

us-gaap:StockholdersEquity
us-gaap:StatementClassOfStock
us-gaap:StatementEquityComponents
us-gaap:StatementClassOfStock
us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:TreasuryStockValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:DepreciationDepletionAndAmortization

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInInventories

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquireProductiveAssets

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:EffectiveIncomeTaxRateContinuingOperations
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits
us-gaap:LossContingenciesByNatureOfContingency, us-gaap:SubsequentEventType
regn:GainContingencyInterPartesReviewFiledNumber
us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
regn:Levelsoftwelvemonthsalesatwhichsalesmilestonepaymentswouldbereceived
us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
regn:MaximumTransactionAgreementPayments
us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject, us-gaap:SubsequentEventType
us-gaap:Range, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
regn:PercentageOfTrialCostsRequiredToBeFundedByCollaboratingParty
us-gaap:ProductOrService, us-gaap:StatementGeographical, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
regn:ReimbursementOfOtherExpenses
us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
regn:ReimbursementOfResearchAndDevelopmentExpense
us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject, us-gaap:IncomeStatementLocation
us-gaap:ProductOrService, us-gaap:StatementGeographical, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
regn:ReimbursementOfSellingGeneralAndAdministrativeExpense
us-gaap:Range, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
regn:RevenueBasedOnPercentageOfAnnualSalesInJapan
us-gaap:Range, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
regn:RevenuebasedonpercentageofannualsalesinJapan

regn:StockIssuedDistributedDuringPeriodValueEmployeeBenefitPlan
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities

us-gaap:CapitalExpendituresIncurredButNotYetPaid
us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
us-gaap:ConcentrationRiskPercentage1
us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
us-gaap:ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueModificationOfContract

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
us-gaap:AwardType
us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InventoryWriteDown
us-gaap:LitigationCase
us-gaap:LossContingencyAccrualCarryingValuePeriodIncreaseDecrease

us-gaap:MarketableSecuritiesRealizedGainLoss

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

us-gaap:OtherNoncashIncomeExpense
us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
us-gaap:OtherOperatingIncome
us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject, us-gaap:IncomeStatementLocation

us-gaap:OtherOperatingIncomeExpenseNet

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsToAcquireMarketableSecurities

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromSaleAndMaturityOfMarketableSecurities

us-gaap:RepaymentsOfShortTermDebt
us-gaap:StatementClassOfStock
us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation
us-gaap:StatementEquityComponents
us-gaap:StatementClassOfStock
us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:StockRepurchasedDuringPeriodShares

us-gaap:StockRepurchasedDuringPeriodValue
us-gaap:StatementEquityComponents

us-gaap:TreasuryStockSharesAcquired
us-gaap:StatementEquityComponents

us-gaap:TreasuryStockValueAcquiredCostMethod
dei:LegalEntity, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
us-gaap:ShareRepurchaseProgram
us-gaap:StatementEquityComponents
us-gaap:StatementClassOfStock
dei:EntityCommonStockSharesOutstanding

regn:AccruedClinicalTrialExpenseCurrent

regn:AccruedSalesRelatedChargesDeductionsAndRoyalties
us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
regn:ContingentReimbursementObligation

regn:LesseeFinanceLeaseLiabilityDebtFinancingCosts
us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
regn:MaximumPercentageOfOutstandingSharesThatMayBeAcquiredUnderStandstillProvisions
us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
regn:PercentageOfOutstandingSharesOrVotingRightsUnderAmendedInvestorAgreement
us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
regn:UnsatisfiedObligation

us-gaap:AccountsAndNotesReceivableNet
us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

us-gaap:AccountsPayableCurrentAndNoncurrent

us-gaap:AccountsReceivableRelatedPartiesCurrent
us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

us-gaap:AccruedLiabilitiesAndOtherLiabilities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
regn:ClassificationOfInvestment, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
regn:ClassificationOfInvestment, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
regn:ClassificationOfInvestment, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue

us-gaap:AvailableForSaleSecuritiesDebtSecurities
regn:ClassificationOfInvestment, us-gaap:FinancialInstrument
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument
us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
us-gaap:ContractWithCustomerLiability

us-gaap:ContractWithCustomerLiabilityNoncurrent
us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredTaxAssetsDeferredIncome

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsPropertyPlantAndEquipment

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:EmployeeRelatedLiabilitiesCurrent
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueAmount

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseRightOfUseAssetAccumulatedAmortization

us-gaap:InventoryFinishedGoodsNetOfReserves

us-gaap:InventoryRawMaterialsNetOfReserves

us-gaap:InventoryWorkInProcessNetOfReserves

us-gaap:LesseeFinanceLeaseDiscountRate

us-gaap:LongTermDebtFairValue

us-gaap:LossContingencyAccrualAtCarryingValue
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:MarketableSecurities
us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency

us-gaap:MarketableSecuritiesNoncurrent

us-gaap:OtherInventoryNetOfReserves
us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
us-gaap:OtherLiabilities

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
us-gaap:StatementGeographical

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:RestrictedCash
us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
us-gaap:RevenueRemainingPerformanceObligation
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
us-gaap:ShareRepurchaseProgram
us-gaap:StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1

us-gaap:ValuationAllowancesAndReservesBalance
us-gaap:ValuationAllowancesAndReservesType

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Expenses
Interest Expense
Balance Sheet
Long Term Debt Noncurrent
Assets
Inventory Net
Current Assets
Prepaid Expense And Other Assets Current
NonCurrent Assets
Other Assets Noncurrent
Liabilities
Liabilities Current
Current Liabilities
Taxes Payable Current
Noncurrent Liabilities
Other Liabilities Noncurrent
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
CashFlow
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInOperatingActivities
Increase Decrease In Inventories
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
NonoperatingIncomeExpense
Interest Expense
InventoryNet
Inventory Finished Goods Net Of Reserves

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonStock▃▃▃▃▃▃▃▃▃▃▃██████▇▇▇▇▇▆▆▆▅▄▃▃▃▂▂▂▁▁0.10.10.10.10.10.10.10.10.10.10.10.110.110.110.110.1090.1090.1080.1080.1070.1070.1070.1060.1060.1050.1030.1020.10.10.0990.0970.0970.0970.0950.095NANANA0.091NANANANANANANA
 us-gaap:SharesOutstanding us-gaap:StatementClassOfStock us-gaap:CommonClassA▁▁▁▁▁▁▁▁▇▇▇▇▇▇█1.81.81.81.81.81.81.81.81.91.91.91.91.91.91.911NANANA1.911NANANA1.913NANANA1.973NANANA2.02NANANA2.069NANANA2.109NANANANANANANA
 us-gaap:SharesOutstanding us-gaap:StatementClassOfStock us-gaap:CommonStockNANA121.5120.5119.8116.0113.3112.1111.9111.7111.1110.3109.9109.7109.477NANANA107.86NANANA106.378NANANA102.475NANANA97.667NANANA95.223NANANA90.692NANANANANANANA
 us-gaap:SharesOutstanding us-gaap:StatementEquityComponents us-gaap:CommonStock█▄▁122.5121.9121.5NA119.8116.0113.3NANANANANANANANANANANANANANANANANANANANA100.19699.54598.84897.66797.35196.66295.65195.22394.4193.94292.96990.69290.41989.41688.54887.238NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁110.8110.5NA113.9117.9115.1NA114.2114.6115.5NA115.088114.477114.906NA117.028116.137115.106NA116.466116.231114.228NA115.944115.259114.519NA117.423113.032112.151NA116.713111.06109.369NA115.83110.167107.734NA91.04690.43689.162NANANANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic ▁█105.0105.4NA105.5109.6109.8NA109.4109.2108.9NA108.033107.8107.648NA106.706106.034105.572NA104.833104.633104.29NA103.348102.886102.227NA100.796100.39198.709NA98.22697.796.878NA95.01294.58993.446NA91.04690.43689.162NANANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities us-gaap:EmployeeStockOption▄▄5.05.0NA0.10.110.2NA18.318.312.3NA14.44614.86514.878NA4.5157.95911.535NA7.6877.9047.539NA0.5943.3663.673NA1.2273.7653.646NA0.1351.2473.868NANANANANANANANANANANANA
us-gaap:EarningsPerShareBasic █▄▄▃▃▂▃▃▂▂▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▂▂▁▁▁▁▁▁29.5110.5810.97.988.195.697.256.121.774.237.585.55.124.441.623.643.662.362.412.531.881.591.492.041.890.741.090.790.920.660.981.440.891.024.922.020.810.12-0.5800000000000001-0.68-0.69-0.49NANANANA
us-gaap:EarningsPerShareDiluted █▄▄▃▃▂▃▃▂▂▃▂▂▂▂▂▂▂▂▂▂▂▁▂▂▁▁▁▁▁▁▁▁▁▂▂▁▁▁▁▁▁27.9710.0910.247.397.615.436.935.861.683.997.155.174.824.161.53.323.342.162.192.271.691.451.341.821.690.660.960.70.820.580.861.250.790.94.081.720.70.11-0.5800000000000001-0.68-0.69-0.49NANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 COGS Ratio us-gaap:ProductOrService us-gaap:Product█▃▃▂▂▂▂▂▂▁▁▁▁▁▁▁▁4137.81724.31621.81482.21226.91236.71286.41238.31205.31104.41096.4211025.488996.382987.9978.755957.367924.133NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 TTM Greenblatt ROC _ _█▃▄▃▂▃▃▃▂▂▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▂▂▂▂▁▁▁▂▁▁▁▁▁▁▁3347.21112.71167.01053.1656.4700.1675.7738.5315.6480.0718.058626.923622.188567.231538.811559.926550.312430.542347.003362.802291.628329.308231.082392.422344.859283.553215.803182.719222.406185.939212.073236.802158.103153.05145.67202.36487.47822.201-45.402-58.457-60.319-40.981-12.777NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:ComprehensiveIncomeNetOfTax █▄▄▃▃▂▃▃▂▂▃▂▂▂▁▂▂▂▂▂▂▁▁▂▂▁▁▁▁▁▁▁▁▁▂▂▁▁▁▁▁▁▁▁▁3098.41102.11147.7837.4941.9594.4796.6670.3206.1476.2818.619595.748555.394468.339150.324409.804395.976255.887243.174256.701197.058161.528155.845198.966165.89271.674135.532102.35295.53368.09698.469141.88485.59198.396471.145191.93575.70912.176-53.574-63.192-61.234-43.131-16.913-33.744-26.497NA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService regn:CollaborationandContractManufacturing▇▅█▆█▆▅▅▃▄▃▃▂▁▁▂▂154.3124.8173.5143.0173.0138.5115.4110.785.5108.373.18279.55255.71145.753.05357.84460.788NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService us-gaap:Product█▃▃▂▂▂▂▂▁▂▁▁▁▂▁▁▁539.4183.2179.6131.0102.578.8108.5115.967.070.943.9930.81735.9569.252.72646.38842.133NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService,us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject regn:SanofisShareofLibtayoU.S.GrossProfits,regn:SanofiCollaborationAgreementImmunooncologyNANANA31.528.226.8NA20.119.012.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CostsAndExpenses █▆▆▆▆▅▇▆▇▆▆▅▅▄▅▄▄▄▄▄▄▄▄▄▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁1791.31416.01255.91240.91295.61128.11493.81309.91618.11231.81209.71036.573985.834944.2541043.636940.747919.804888.449879.824857.32921.001871.541866.995745.0653.758586.059586.526543.069443.294439.801398.339360.225299.539286.614268.932225.323216.921209.588168.379161.29168.129153.185146.452138.073139.61132.411
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments █▃▃▃▃▂▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁3752.81253.01224.6998.3918.9668.6889.8768.5224.7546.1676.167635.861656.074585.398554.767565.605525.85432.289341.527365.881292.256330.151227.289393.289327.996276.523189.723176.078203.119175.263198.153225.684147.692141.831134.559191.46876.74311.651-54.058-61.803-63.368-43.663-14.597-33.875-25.474-30.522
us-gaap:IncomeTaxExpenseBenefit █▄▄▄▄▄▄▄▄▄▂▄▄▄▆▅▄▅▄▄▄▅▄▅▄▅▄▄▄▄▄▄▄▄▁653.9137.875.4156.221.644.097.898.931.685.0-144.18641.206104.662107.418381.248177.288138.106183.35888.412101.07796.038164.41572.295182.891133.353200.50299.62896.358110.384109.82101.34784.37860.31642.957-335.8NA0.0NA-0.6150.562-0.863-0.2160.00.00.00.0
us-gaap:InterestExpense ▄▄▄█▂▁▁▂▂▂▂▂▂▁▁▁▁▂14.414.614.826.39.76.16.77.88.07.77.3497.4946.9186.4396.0166.1825.4017.501NANANANA3.6091.7152.7486.1696.359.23210.17711.61311.66111.73611.36511.67511.49511.41311.23611.169.4554.0614.0473.7192.4582.2342.3422.084
 us-gaap:InterestExpenseDebt us-gaap:LongtermDebtType us-gaap:SeniorNotes▄▄11.111.1NA6.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss █▄▄▃▃▃▃▃▂▂▃▂▂▂▂▂▂▂▂▂▂▂▁▂▂▁▁▁▁▁▁▁▁▁▂▂▁▁▁▁▁▁▁▁▁▁3098.91115.21149.2842.1897.3624.6792.0669.6193.1461.1820.4594.655551.412477.98173.519388.317387.744248.931253.115264.804196.218165.736154.994210.398194.64376.021110.17679.7292.73565.44396.806141.30687.37698.874470.407191.46876.74311.651-53.443-62.365-62.505-43.447-14.597-33.875-25.474-30.522
us-gaap:NonoperatingIncomeExpense █▄▃▂▆▂▅▃▁▃▂▂▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂405.6140.357.6-54.8262.5-31.5214.130.0-90.966.1-41.8918.93833.88618.16715.9565.679-24.4621.747-5.4763.0790.6280.843-3.7930.867-16.863-7.03-26.08-6.641-19.287-10.676-13.92-11.118-10.411-11.219-11.111-10.896-10.735-10.55-8.656-3.346-3.049-2.682-1.82-1.781-1.75-1.645
us-gaap:OperatingIncomeLoss █▃▄▃▂▃▃▃▂▂▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▂▂▂▂▁▁▁▂▁▁▁▁▁▁▁▁▁▁3347.21112.71167.01053.1656.4700.1675.7738.5315.6480.0718.058626.923622.188567.231538.811559.926550.312430.542347.003362.802291.628329.308231.082392.422344.859283.553215.803182.719222.406185.939212.073236.802158.103153.05145.67202.36487.47822.201-45.402-58.457-60.319-40.981-12.777-32.094-23.724-28.877
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax ████▇▁█▆▁▃0.30.20.30.20.0-1.40.2-0.3-1.4-1.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherComprehensiveIncomeLossNetOfTax █▁-0.5-13.1NA-4.744.6-30.2NA0.713.015.1NA1.14.1-9.7NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome█▁-0.5-13.1NA-4.744.6-30.2NA0.713.015.1NA1.14.1-9.7NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherNonoperatingIncomeExpense █▄▃▂▆▂▅▃▁▃▂▂▃▂▂▂▂▂▂▂▂▂420.0154.972.4-28.5272.2-25.4220.837.8-82.973.8-34.54216.43240.80424.60621.99111.861-19.0619.248-2.6683.5751.8793.483NANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ResearchAndDevelopmentExpense ▅▆▆▅▆▅▅▅█▅▅▄▄▄▄▄▄▄▄▄▄▄▄▃▃▃▃▃▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁714.2742.9744.5684.6722.0583.9683.1663.41048.3641.8601.253556.972529.289498.586527.983529.749509.975507.435479.206543.047559.93470.112461.21425.924390.33343.113351.745337.728294.501287.379268.14224.045187.463180.299181.024158.295147.373138.862129.041127.924143.149129.392125.212122.043124.526117.471
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax █▄▄▄▄▃▄▄▄▃▄▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁5138.52528.72422.92294.01952.01828.22169.52048.41933.71711.81927.81663.4961608.0221511.51582.41500.6731470.1161319.01226.8271220.1221212.6291200.8491098.0771137.422998.617869.612802.329725.788665.7625.74610.412597.027457.642439.664414.602427.687304.399231.789122.977102.833107.81112.204133.675105.979115.886103.534
us-gaap:Revenues █▄▄▄▄▃▄▄▄▃▄▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁5138.52528.72422.92294.01952.01828.22169.52048.41933.71711.81927.81663.4961608.0221511.4851582.4471500.6731470.1161318.9911226.8271220.1221212.6291200.8491098.0771137.422998.617869.612802.329725.788665.7625.74610.412597.027457.642439.664414.602427.687304.399231.789122.977102.833107.81112.204133.675105.979115.886103.534
us-gaap:SellingGeneralAndAdministrativeExpense ▆▆▅▅▅▅█▆▆▆▇▅▅▅▆▅▅▄▅▄▄▄▄▃▃▃▃▃▂▂▂▂▂▂▂▁▁▂▁▁▁▁▁▁▁▁414.7405.6303.5326.9348.3367.3586.8419.9417.3410.8491.314369.232364.884330.77409.913306.766306.908296.846325.937270.045292.038289.677294.954209.993174.588158.991175.307149.748102.414108.8582.08597.60772.46377.2657.73946.88347.70558.42836.34932.91624.58523.41120.64115.65814.67914.223
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:Assets █▇▇▆▆▆▆▅▅▅▅▄▄▄▄▄▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁21485.917772.217163.316084.014428.715757.514805.213939.313173.612854.811734.510805.6139951.989372.6968764.2868701.2158106.3737817.3656973.4666828.0196204.9065904.465609.1325182.9154526.974198.5733871.8273739.4193456.0783260.3962951.0132640.4152378.2592275.9982080.491660.6151457.51350.1591323.583983.0311046.8641074.2931089.432NANANA
us-gaap:Liabilities █▇██▇▅▅▄▄▄▄▄▄▄▃▄▃▄▃▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁6358.65795.26138.05958.55371.33624.53715.53434.93417.73410.12977.22937.3132765.5542805.0522620.2082649.6222585.6352951.3442524.2212336.7722128.42139.3781954.2951886.0481188.5121227.1431329.5021187.6311087.2361049.148998.937950.244884.922869.65835.105854.591862.843846.135837.851554.778568.83556.202561.617NANANA
us-gaap:LiabilitiesAndStockholdersEquity █▇▇▆▆▆▆▅▅▅▅▄▄▄▄▄▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁21485.917772.217163.316084.014428.715757.514805.213939.313173.612854.811734.510805.6139951.989372.6968764.2868701.2158106.3737817.3656973.4666828.0196204.9065904.465609.1325182.9154526.974198.5733871.8273739.4193456.0783260.3962951.0132640.4152378.2592275.9982080.491660.6151457.51350.1591323.583983.0311046.8641074.2931089.432NANANA
us-gaap:StockholdersEquity █▇▆▆▅▇▆▆▅▅▅▅▄▄▄▄▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁15127.311977.011025.310125.59057.412133.011089.710504.49755.99444.78757.37868.37186.4266567.6446144.0786051.5935520.7384866.0214449.2454491.2474076.5063765.0823654.8373296.8673338.4582971.432542.3252551.7882368.8422211.2481952.0761690.1711493.3371406.3481245.385806.024594.657504.024485.732428.253478.034518.091527.815348.064371.216386.271
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AssetsCurrent █▆▆▆▅▅▅▅▄▅▄▄▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁13337.610055.19779.19097.67860.28644.17689.17109.16651.06928.66447.65719.5834814.9174544.7324335.034135.7423860.0513669.2633180.1883501.6893209.2253133.3792915.0952675.642283.3412310.7142167.4612200.5121918.6951871.0491796.9341634.161561.3621307.1221206.012948.603769.193696.915652.875339.872413.273325.501357.622NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue █▅█▆▇█▆▅▄▆▆▄▄▄▃▃▃▃▂▄▃▃▃▃▂▂▃▃▃▂▂▂▂▁▁▁▁▂▂▁▁▁▁▂▁▁2072.21437.92193.71573.01992.22208.21617.81384.81045.51708.51467.71087.843917.8761019.491812.733792.065744.313811.773535.203920.359646.508604.214809.102654.587390.554507.907648.719646.554600.135461.858535.608263.211381.675180.362230.276118.998171.943394.585483.61206.395254.312135.376112.572325.286112.0117.311
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▇▅█▅▇█▆▅▃▆▅▃▃▃▂▂▂▂▁2084.71450.42207.31586.62004.72220.71630.31397.31058.01721.01480.21100.343930.3761031.991825.233804.565756.813824.273547.703NANANA809.1NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:MarketableSecuritiesCurrent ▇█▆▆▅▇▆▆▆▆▆▅▄▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁1838.62065.91393.31452.91152.01795.21596.51493.11624.21523.91342.21104.309765.642605.461596.847586.879523.537495.311503.481488.032398.656244.965236.121241.055213.694234.257251.761395.65216.774186.275158.376182.112155.831127.34877.819143.554129.07937.71343.33239.10355.37191.065136.796NANANA
us-gaap:AccountsReceivableNetCurrent █▅▄▄▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁6998.64173.03111.53092.51991.02063.12100.02027.71920.21728.41723.71665.7371534.3241531.9361538.6421532.6931420.4031339.7941343.3681332.0711431.9661450.5721152.4891088.2071071.6651015.962739.379673.915664.075801.773787.071855.844767.865703.857593.207506.682349.645159.46228.2543.6592.9213.76513.509NANANA
us-gaap:InventoryNet ▇█▇▇▆▆▆▅▅▅▅▄▄▄▃▃▃▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁1983.92164.71916.61801.61640.91480.91415.51344.31317.21208.81151.21039.679928.553820.397726.138641.588554.32466.576399.356345.62316.073303.294238.578190.668171.266133.863128.861120.317109.89786.54570.35463.29257.15943.97728.63829.5710.56.23.5NANANANANANANA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent █▄▃▅▅▄▇▄▄▄▅▅▃▃▄▃▄▃▃▂▂▃▃▂▁▁▂▂▂▂▂▃▃▂▂▂▁▁▁▁▁444.3213.6160.8230.6263.8226.6387.1226.9208.2182.2243.3284.807163.599155.451224.972143.761193.334146.055130.528103.80696.017115.685163.50189.49443.09934.09971.48661.73260.67452.25296.141156.839108.91397.14256.66384.7832.79126.2722.89815.92719.026NA15.142NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:PropertyPlantAndEquipmentNet ███▇▇▇▇▇▆▆▆▆▆▆▆▅▅▅▅▅▄▄▄▄▃▃▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁3358.53262.63221.63138.33031.42944.62890.42771.42676.62612.82575.82524.4462461.6142394.7272358.6052274.5292261.7022277.0292083.4211872.1671772.9231666.3911594.121475.1231326.1121110.597974.309818.967707.321600.864526.983453.891419.651392.378379.94372.917372.278369.959367.955363.913361.883357.423347.45NANANA
us-gaap:DeferredTaxAssetsLiabilitiesNet NANA718.7NANANA791.4NANANA670.1NANANA506.291NANANA825.303NANANA461.945NANANA316.104NANANA276.555NANANA342.642NANANA0.0NANANA0.0NANANA
us-gaap:OtherAssetsNoncurrent ▇▇███▇▇▆▇▇▆▆▄▄▄▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▂▂▂▂▂▂▁▁▁▁142.9145.7168.1168.8175.5161.2144.7137.9139.8144.3127.4125.19785.66978.98477.86636.61836.96337.08720.29420.7056.7155.7915.814.5834.1384.4733.0343.4168.8775.345.3274.40915.21120.07823.118.32219.56720.39319.14513.02312.28710.2286.789NANANA
 us-gaap:EquitySecuritiesFvNi regn:ClassificationOfInvestment,us-gaap:FairValueByFairValueHierarchyLevel,us-gaap:FairValueByMeasurementFrequency regn:Restricted,us-gaap:FairValueInputsLevel1,us-gaap:FairValueMeasurementsRecurring█▆▅▅▅▄▄▁▁▁▁▁1352.9924.7791.5720.0751.9510.3557.249.362.266.00.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:EquitySecuritiesFvNi regn:ClassificationOfInvestment,us-gaap:FairValueByFairValueHierarchyLevel,us-gaap:FairValueByMeasurementFrequency regn:Restricted,us-gaap:FairValueInputsLevel2,us-gaap:FairValueMeasurementsRecurring18.0NANA16.315.40.00.0333.5284.87.844.453.226NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:EquitySecuritiesFvNi regn:ClassificationOfInvestment,us-gaap:FairValueByFairValueHierarchyLevel,us-gaap:FairValueByMeasurementFrequency regn:Unrestricted,us-gaap:FairValueInputsLevel1,us-gaap:FairValueMeasurementsRecurring▁▇▃▂▂▃▅▃▅▄▃█▇30.477.748.341.337.851.761.646.967.056.943.690.44585.588NA62.785NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:EquitySecuritiesFvNi regn:ClassificationOfInvestment,us-gaap:FairValueByMeasurementBasis,us-gaap:FairValueByMeasurementFrequency regn:Restricted,us-gaap:EstimateOfFairValueFairValueDisclosure,us-gaap:FairValueMeasurementsRecurringNA924.7791.5736.3767.3510.3557.2382.8347.073.844.453.226NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:EquitySecuritiesFvNi regn:ClassificationOfInvestment,us-gaap:FairValueByMeasurementBasis,us-gaap:FairValueByMeasurementFrequency regn:Unrestricted,us-gaap:EstimateOfFairValueFairValueDisclosure,us-gaap:FairValueMeasurementsRecurringNA77.748.341.337.851.761.646.967.056.943.690.44585.588NA62.785NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:EquitySecuritiesFvNi regn:ClassificationOfInvestment,us-gaap:FairValueByMeasurementFrequency regn:Restricted,us-gaap:FairValueMeasurementsRecurring1370.9NA791.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:EquitySecuritiesFvNi regn:ClassificationOfInvestment,us-gaap:FairValueByMeasurementFrequency regn:Unrestricted,us-gaap:FairValueMeasurementsRecurring30.4NA48.3NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent NANA1521.8NANANA1086.8NANANA772.1NANANA815.078818.426716.3641061.777879.096714.916759.643733.276644.112577.428529.505462.762484.228337.976283.385237.935250.896219.138153.826145.413111.345124.224126.768106.72395.62578.8981.66558.60253.658NANANA
us-gaap:AccountsPayableCurrent NANA475.5NANANA418.1NANANA218.2NANANA178.2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ContractWithCustomerLiabilityCurrent ▄▁█520.0464.9577.7NANANA591.7NANANA452.5NANANA320.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesCurrent █▇▆▅█▅▅▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁3732.43217.82697.42337.83702.42055.22096.61765.41713.11511.41442.81417.231331.191265.741135.4831138.6281029.0171308.2711241.495961.185951.563919.724811.162734.99601.542536.134654.66410.2351.578305.068298.835268.727203.802197.244163.55178.568183.22160.386148.271133.235135.868112.252109.056NANANA
us-gaap:OtherAccruedLiabilitiesCurrent NANA329.6NANANA301.3NANANA164.6NANANA129.4184.69179.3799.048103.51283.458107.034102.63985.644126.06872.20597.879117.30255.68348.53738.10729.02238.31919.94522.36719.56922.19815.22318.19914.1348.2087.81NA6.441NANANA
us-gaap:OtherLiabilitiesCurrent NANA122.496.9103.885.085.0NANANANANANANA0.2670.3340.3970.8763.4613.5863.69513.50813.5632.5062.2912.18596.407NANANA0.939NANANANANANANANANANANANANANANA
us-gaap:TaxesPayableCurrent NANA19.5NANANA49.4NANANA20.8NANANA0.227126.61223.24450.805235.776155.485170.269144.0780.0NANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType regn:SeniorUnsecuredNotesDue2030,us-gaap:SeniorNotes█▄▁1239.31239.01238.7NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType regn:SeniorUnsecuredNotesDue2050,us-gaap:SeniorNotes██▁739.9739.9739.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:LongtermDebtType us-gaap:SeniorNotes█▅▁1979.21978.91978.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LongTermDebtNoncurrent █▆▃▁1979.21978.91978.51978.3NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent ▇▇█▆▆▄▄▄▄▅▅▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁596.3571.5687.1454.0457.9321.5286.0273.0267.9376.3361.7194.033190.02169.922152.073125.225115.92106.248100.385135.7119.523120.993115.53577.9176.0855.55940.85523.74714.96811.79411.3310.57310.28.7867.2596.9877.2627.4556.4437.4056.8067.187.35NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:StockholdersEquity █▇▆▆▅▇▆▆▅▅▅▅▄▄▄▄▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁15127.311977.011025.310125.59057.412133.011089.710504.49755.99444.78757.37868.37186.4266567.6446144.0786051.5935520.7384866.0214449.2454491.2474076.5063765.0823654.8373296.8673338.4582971.432542.3252551.7882368.8422211.2481952.0761690.1711493.3371406.3481245.385806.024594.657504.024485.732428.253478.034518.091527.815348.064371.216386.271
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonStock▃▃▃▃▃▃▃▃▃▃▃██████▇▇▇▇▇▆▆▆▅▄▃▃▃▂▂▂▁▁0.10.10.10.10.10.10.10.10.10.10.10.110.110.110.110.1090.1090.1080.1080.1070.1070.1070.1060.1060.1050.1030.1020.10.10.0990.0970.0970.0970.0950.095NANANA0.091NANANANANANANA
us-gaap:AdditionalPaidInCapital ██▇▇▇▆▅▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁7225.86887.86716.26592.86263.05211.44428.64388.44263.64160.93911.63841.1743712.5993611.5993512.8333570.6733449.6223190.8823029.9933314.9823156.9423049.6513099.5262880.1093118.9692812.5732404.1182423.4342342.8392236.9312045.8571882.4211827.4711826.0751763.5081795.2931775.8611760.9381754.8241643.7721630.3621609.1851575.78NANANA
us-gaap:RetainedEarningsAccumulatedDeficit █▇▆▆▅▅▅▄▄▄▄▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁15107.112008.210893.09743.88901.78004.47379.86587.85918.25725.15254.34433.9043839.1793287.7672946.7332773.2142384.8971997.1531748.2221495.1071230.3031018.436852.7697.706487.308292.665255.382145.20665.486-27.249-92.692-189.498-330.804-418.18-517.054-987.461-1178.929-1255.672-1267.323-1213.88-1151.515-1089.01-1045.563NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▄▄▆▆▆▂▅▄▄▃▁▂▁▁▃▅▃▂▁▂▃▃▃▃▅██▅▃▃▂▂▂▂▂▂▂▂▂▂▃▂▂15.716.229.330.835.5-9.121.116.515.82.8-12.3-10.519-11.612-15.5940.6423.8352.348-5.884-12.84-2.8995.2044.3648.5727.72119.15347.90452.25126.8954.2631.465-1.188-2.851-3.429-1.644-1.166-1.904-2.371-1.337-1.862-1.731-0.904-2.175-2.491NANANA
us-gaap:TreasuryStockValue ██▇▇▇▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁7221.46935.36613.36242.06142.91073.8739.9488.4441.8444.2396.4396.371353.852316.24316.24316.24316.24316.24316.24316.052316.052307.478306.069288.777287.079181.817-169.5343.849-43.848NA0.0NANANANANANANANANANANANANANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue █▁135.9135.6NA104.6105.2108.0NA112.7109.2114.8NA116.5113.185.8NANANANANANANANANANANANA82.61174.55572.15582.98255.29346.0845.17353.55530.67420.65719.40223.44815.84113.38312.48714.898NANANA8.834
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▅█▁▇▅▆▅▃▆▆▄▄▅▅▄▂▄▄▅▄▂▄▆▃▂▃▃▄▂▄▃▃▃▃▂▂▂▂▂▂▂▂▃▂▂626.7668.51231.0-254.3943.4698.0787.4557.3188.3897.0728.831452.961394.565618.743566.949414.832-30.57355.901377.879651.029415.14829.34281.823892.853243.606-87.502198.283163.557327.7953.527276.78192.455128.16486.24893.185-2.382-78.377-87.041-50.317-46.735-34.05-10.58-43.729161.501-11.85-9.578
us-gaap:NetCashProvidedByUsedInInvestingActivities ▄▁▃▂█▃▃▃▂▂▃▃▃▃▃▃▃▄▃▃▃▄▄▃▃▄▄▄▄▃▄▃▄▄▄▄▄▄▄▄▄▄▃▄▄▄125.8-1059.0-305.0-775.81453.4-443.2-208.7-207.0-836.0-776.1-265.907-286.708-484.973-425.412-335.746-358.884-170.409-140.143-271.356-405.853-326.01-43.685-123.3-283.171-371.649-129.48156.645-123.068-118.123-236.231-109.948-214.452116.63-147.68591.103-48.754-139.18815.766-33.908-0.903142.93520.347-351.74450.1723.82-136.401
us-gaap:NetCashProvidedByUsedInFinancingActivities ▆▆▆█▁▇▆▇▇▇▆▇▇▇▆▇▇▇▆▇▇▆▇▆▇▇▆▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇-118.2-366.4-305.3612.0-2612.8335.6-345.7-11.0-15.3119.9-83.0343.714-11.20713.427-210.535-8.196133.51960.812-491.67928.675-46.844-190.543-4.008-345.64910.6976.171-252.7635.93-71.39108.954105.5643.533-43.48111.523-73.01-1.809-5.077-17.75361.44-0.27910.05113.037182.7591.6132.71956.215
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect █▁█▃▄█▆▇▁▆▇▆634.3-756.9620.7-418.1-216.0590.4233.0339.3-663.0240.8379.9169.9NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:DepreciationDepletionAndAmortization ██▇▇▇▆▆▆▆▆▅▄▄▄▄▅▄▅▄▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁71.167.461.759.358.856.154.352.952.151.042.75935.44133.64236.35834.50737.71935.12638.11528.927.83925.02922.97722.9120.67415.29816.02714.13514.00513.01611.5311.29210.8039.7029.4079.7789.3299.4178.4167.9448.2767.9026.9786.0864.8944.5244.183
us-gaap:IncreaseDecreaseInAccountsReceivable █▁▂▄▁▂▁▂▂▂▁▂▂▁▁▂▂▂▁▁▁▂▁▁▂▂▂▁▁▂▁▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁2825.658.380.81228.2-121.9169.012.2204.1150.7106.140.295163.69895.315-30.4082.891126.90294.999137.928-32.252-108.099-113.25397.42828.47844.1997.69321.06390.14533.33-153.57292.529-101.046116.80873.378109.51891.849165.891197.033135.31235.783-6.117-3.592-4.95610.825-12.90923.3386.29
us-gaap:IncreaseDecreaseInInventories ▁█▅▆▆▄▄▃▄▃▄▄▄▄▄▄▄▃▃▂▂▃▃▃▃▂▂▂▂▂▂▂▂▂-31.3252.8127.0169.0162.670.8108.359.0109.658.6106.27699.52493.3488.7678.5584.10181.869.74450.0726.81810.62562.26330.36631.60743.925.9329.98313.62221.74515.5511.2145.59813.56317.581NANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▅█▁▇▅▆▅▃▆▆▄▄▅▅▄▂▄▄▅▄▂▄▆▃▂▃▃▄▂▄▃▃▃▃▂▂▂▂▂▂▂▂▃▂▂626.7668.51231.0-254.3943.4698.0787.4557.3188.3897.0728.831452.961394.565618.743566.949414.832-30.57355.901377.879651.029415.14829.34281.823892.853243.606-87.502198.283163.557327.7953.527276.78192.455128.16486.24893.185-2.382-78.377-87.041-50.317-46.735-34.05-10.58-43.729161.501-11.85-9.578
us-gaap:NetIncomeLoss █▄▄▃▃▃▃▃▂▂▃▂▂▂▂▂▂▂▂▂▂▂▁▂▂▁▁▁▁▁▁▁▁▁▂▂▁▁▁▁▁▁▁▁▁▁3098.91115.21149.2842.1897.3624.6792.0669.6193.1461.1820.4594.655551.412477.98173.519388.317387.744248.931253.115264.804196.218165.736154.994210.398194.64376.021110.17679.7292.73565.44396.806141.30687.37698.874470.407191.46876.74311.651-53.443-62.365-62.505-43.447-14.597-33.875-25.474-30.522
us-gaap:ShareBasedCompensation ▇▇▆▅▅▆▇▆▆▆▇▆▆▄▇▆▆▇█▇▇▇█▅▅▅▄▄▄▄▃▃▃▃▂▂▂▂▁▁▁▁▁▁▁▁145.5130.9121.5101.2103.5105.8133.5117.1105.8107.9126.748111.435106.79582.422127.133125.097121.258133.789154.558131.379131.691142.25158.392102.694.257103.75981.45468.164.82881.40855.18245.74444.44353.0330.77220.53519.60623.24415.53313.36412.39614.80113.5668.798.7078.834
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▄▁▃▂█▃▃▃▂▂▃▃▃▃▃▃▃▄▃▃▃▄▄▃▃▄▄▄▄▃▄▃▄▄▄▄▄▄▄▄▄▄▃▄▄▄125.8-1059.0-305.0-775.81453.4-443.2-208.7-207.0-836.0-776.1-265.907-286.708-484.973-425.412-335.746-358.884-170.409-140.143-271.356-405.853-326.01-43.685-123.3-283.171-371.649-129.48156.645-123.068-118.123-236.231-109.948-214.452116.63-147.68591.103-48.754-139.18815.766-33.908-0.903142.93520.347-351.74450.1723.82-136.401
us-gaap:PaymentsToAcquireProductiveAssets ▅▄▆▅▅▆▅▄▄▃▃▄▄▃▄▃▂▂▅▄▅▄▆▅█▄▄▃▃▃▃▂▂▁▁▁▁▁▁▁▁▁▂▁▁▁148.5115.3161.4153.2129.9170.1139.0121.794.674.385.462106.246112.01779.375107.66359.65354.84950.461150.455118.556138.836104.094177.779146.099239.893114.162117.54279.76970.87364.82268.97631.69134.45321.20315.16210.24812.87211.05511.2898.89814.86422.16632.26222.10322.58122.743
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▆▆▆█▁▇▆▇▇▇▆▇▇▇▆▇▇▇▆▇▇▆▇▆▇▇▆▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇-118.2-366.4-305.3612.0-2612.8335.6-345.7-11.0-15.3119.9-83.0343.714-11.20713.427-210.535-8.196133.51960.812-491.67928.675-46.844-190.543-4.008-345.64910.6976.171-252.7635.93-71.39108.954105.5643.533-43.48111.523-73.01-1.809-5.077-17.75361.44-0.27910.05113.037182.7591.6132.71956.215
us-gaap:ProceedsFromIssuanceOfLongTermDebt NANA0.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsForRepurchaseOfCommonStock ▁▁▂▁█▁▁▁▁▁▁▁▁▁▁305.2306.9381.192.15052.9320.7246.519.40.010.00.0224.3780.00.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31

Common Stock Value

us-gaap:CommonStockValue us-gaap:StatementClassOfStock

us-gaap:CommonStockValue

us-gaap:CommonStock


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0110000.0110000.0110000.0110000.0109000.0109000.0108000.0108000.0107000.0107000.0107000.0106000.0106000.0105000.0103000.0102000.0100000.0100000.099000.097000.097000.097000.095000.095000.091000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Shares Outstanding

us-gaap:SharesOutstanding us-gaap:StatementClassOfStock

us-gaap:SharesOutstanding

us-gaap:CommonClassA


Shares
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1.81.81.81.81.81.81.81.81.91.91.91.91.91.91.9111.9111.9131.9732.022.0692.109
Percentage of SharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStock


Shares
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value121120119116113112111111111110109109109107106102979590
Percentage of SharesOutstanding6750.06694.46655.66444.46294.46227.85889.55878.95847.45805.35784.25773.75728.85644.25560.85193.94835.04602.44300.2

us-gaap:SharesOutstanding us-gaap:StatementEquityComponents

us-gaap:CommonStock


Shares
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-31
Value1221211211191161131009998979796959594939290908988877877
Percentage of SharesOutstanding6805.66772.26750.06655.66444.46294.40.00.00.04835.00.00.00.04602.40.00.00.04300.20.00.00.00.00.00.0

us-gaap:TreasuryStock


Shares
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312014-09-302014-06-302013-12-312013-09-302013-06-302012-12-312011-12-31
Value-17.7-17.1-16.4-15.7-15.6-5.7-4.9-4.2-4.0-4.04.0-4.0-3.9-3.8-3.764-3.7643.643-2.018-0.522-0.5220.00.00.00.00.0
Percentage of SharesOutstanding-983.3-950.0-911.1-872.2-866.7-316.7-272.2-233.3-210.5-210.5210.5-210.5-205.3-200.0-197.0-197.0190.4-102.30.00.00.00.00.00.00.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value110110113117115114114115115114114117116115116116114115115114117113112116111109115110107919089
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value10510510510910910910910810810710710610610510410410410310210210010098989796959493919089
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EmployeeStockOption


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value5.05.00.10.1101818121414144.5157.959117.6877.9047.5390.5943.3663.6731.2273.7653.6460.1351.2473.868
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value29.5110.5810.97.988.195.697.256.121.774.237.585.55.124.441.623.643.662.362.412.531.881.591.492.041.890.741.090.790.920.660.981.440.891.024.922.020.810.12-0.58-0.68-0.69-0.49
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value27.9710.0910.247.397.615.436.935.861.683.997.155.174.824.161.53.323.342.162.192.271.691.451.341.821.690.660.960.70.820.580.861.250.790.94.081.720.70.11-0.58-0.68-0.69-0.49
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value3098110211478379415947966702064768185955554681504093952552432561971611551981657113510295689814185984711917512-53.574-63.192-61.234-43.131-16.913-33.744-26.497
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax60.343.647.436.548.332.536.732.710.727.842.535.834.531.09.527.326.919.419.821.016.313.514.217.516.68.216.914.114.410.916.123.818.722.4113.644.924.95.3-43.6-61.5-56.8-38.4-12.7-31.8-22.9

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService

us-gaap:CostOfGoodsAndServicesSold

regn:CollaborationandContractManufacturing


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1541241731431731381151108510873795545535760
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.04.97.26.28.97.65.35.44.46.33.84.83.53.03.43.94.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:CollaborationandContractManufacturing0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Product


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value53918317913110278108115677043303569524642
Percentage of CostOfGoodsAndServicesSold349.6146.8103.591.659.256.994.0104.778.465.560.138.764.5151.499.480.269.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.57.27.45.75.34.35.05.73.54.12.31.92.24.63.33.12.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Product13.010.60.08.88.46.40.09.45.66.40.03.03.67.00.04.84.6

us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:SanofisShareofLibtayoU.S.GrossProfits, regn:SanofiCollaborationAgreementImmunooncology


Cost
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value312826201912
Percentage of CostOfGoodsAndServicesSold22.016.319.418.222.211.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.41.41.51.01.00.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:SanofisShareofLibtayoU.S.GrossProfits regn:SanofiCollaborationAgreementImmunooncology0.00.00.00.00.00.0

Costs And Expenses

us-gaap:CostsAndExpenses

us-gaap:CostsAndExpenses


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1791141612551240129511281493130916181231120910369859441043940919888879857921871866745653586586543443439398360299286268225216209168161168153146138139132
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.956.051.854.166.461.768.963.983.772.062.862.361.362.566.062.762.667.471.770.376.072.679.065.565.567.473.174.866.670.365.360.365.565.264.952.771.390.4136.9156.8155.9136.5109.6130.3120.5127.9

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3752125312249989186688897682245466766356565855545655254323413652923302273933272761891762031751982251471411341917611-54.058-61.803-63.368-43.663-14.597-33.875-25.474-30.522
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax73.049.650.543.547.136.641.037.511.631.935.138.240.838.735.137.735.832.827.830.024.127.520.734.632.831.823.624.330.528.032.537.832.332.332.544.825.25.0-44.0-60.1-58.8-38.9-10.9-32.0-22.0-29.5

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-06-302011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value65313775156214497983185-144.186411041073811771381838810196164721821332009996110109101846042-335.80.0-0.6150.562-0.863-0.2160.00.00.00.0
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.75.43.16.81.12.44.54.81.65.0-7.52.56.57.124.111.89.413.97.28.37.913.76.616.113.423.112.413.316.617.616.614.113.29.8-81.00.0-0.50.5-0.8-0.20.00.00.00.0

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value141414269.76.16.77.88.07.77.3497.4946.9186.4396.0166.1825.4017.5013.6091.7152.7486.1696.359.232101111111111111111119.4554.0614.0473.7192.4582.2342.3422.084
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.60.61.10.50.30.30.40.40.40.40.50.40.40.40.40.40.60.30.20.30.70.81.31.51.91.92.02.52.72.82.73.74.87.73.93.83.31.82.12.02.0

Interest Expense Debt

us-gaap:InterestExpenseDebt us-gaap:LongtermDebtType

us-gaap:InterestExpenseDebt

us-gaap:SeniorNotes


Interest
Period End2021-06-302021-03-312020-09-30
Value11116.4
Percentage of InterestExpenseDebt100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.40.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:SeniorNotes0.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value309811151149842897624792669193461820594551477173388387248253264196165154210194761107992659614187984701917611-53.443-62.365-62.505-43.447-14.597-33.875-25.474-30.522
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax60.344.147.436.746.034.236.532.710.026.942.635.734.331.611.025.926.418.920.621.716.213.814.118.519.58.713.711.013.910.515.923.719.122.5113.544.825.25.0-43.5-60.6-58.0-38.7-10.9-32.0-22.0-29.5

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value309811158428976246691934615945514781007992659614187984701917611-53.443-62.365-62.505-43.447-14.597-33.875-25.474-30.522
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.091.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax60.344.136.746.034.232.710.026.935.834.331.612.511.013.910.515.923.719.122.5113.544.825.25.0-43.5-60.6-58.0-38.7-10.9-32.0-22.0-29.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense

us-gaap:NonoperatingIncomeExpense


Nonoperating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value40514057-54.8262-31.521430-90.966-41.8918.9383318155.679-24.4621.747-5.4763.0790.6280.843-3.7930.867-16.863-7.03-26.08-6.641-19.287-10.676-13.92-11.118-10.411-11.219-11.111-10.896-10.735-10.55-8.656-3.346-3.049-2.682-1.82-1.781-1.75-1.645
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.95.52.4-2.413.4-1.79.91.5-4.73.9-2.20.52.11.21.00.4-1.70.1-0.40.30.10.1-0.30.1-1.7-0.8-3.3-0.9-2.9-1.7-2.3-1.9-2.3-2.6-2.7-2.5-3.5-4.6-7.0-3.3-2.8-2.4-1.4-1.7-1.5-1.6

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value33471112116710536567006757383154807186266225675385595504303473622913292313923442832151822221852122361581531452028722-45.402-58.457-60.319-40.981-12.777-32.094-23.724-28.877
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax65.144.048.245.933.638.331.136.116.328.037.237.738.737.534.137.337.432.628.329.724.027.421.034.534.532.626.925.233.429.734.739.734.534.835.147.328.79.6-36.9-56.8-55.9-36.5-9.6-30.3-20.5-27.9

Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value300000.0200000.0300000.0200000.00-1400000.0200000.0-300000.0-1400000.0-1000000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax100.0100.0100.0100.00.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.0-0.10.0-0.0-0.1-0.1

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-0.5-13.1-4.744-30.20.713151.14.1-9.7
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.0-0.5-0.22.3-1.70.00.70.90.10.3-0.6

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-0.5-13.1-4.744-30.20.713151.14.1-9.7
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.0-0.5-0.22.3-1.70.00.70.90.10.3-0.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value42015472-28.5272-25.422037-82.973-34.5421640242111-19.0619.248-2.6683.5751.8793.483
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.26.13.0-1.213.9-1.410.21.8-4.34.3-1.81.02.51.61.40.8-1.30.7-0.20.30.20.3

Research And Development Expense

us-gaap:ResearchAndDevelopmentExpense

us-gaap:ResearchAndDevelopmentExpense


Research
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value7147427446847225836836631048641601556529498527529509507479543559470461425390343351337294287268224187180181158147138129127143129125122124117
Percentage of ResearchAndDevelopmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.929.430.729.837.031.931.532.454.237.531.233.532.933.033.435.334.738.539.144.546.239.142.037.439.139.543.846.544.245.943.937.541.041.043.737.048.459.9104.9124.4132.8115.393.7115.2107.5113.5

us-gaap:ResearchAndDevelopmentExpense us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:RegeneronsShareOfResearchAndDevelopmentExpenses, regn:SanofiCollaborationAgreementAntibody


Research
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value17241610127.4
Percentage of ResearchAndDevelopmentExpense2.63.42.91.51.21.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.81.30.90.50.60.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:RegeneronsShareOfResearchAndDevelopmentExpenses regn:SanofiCollaborationAgreementAntibody0.00.00.00.00.00.0

us-gaap:ResearchAndDevelopmentExpense us-gaap:ProductOrService, us-gaap:StatementGeographical, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:RegeneronsShareOfResearchAndDevelopmentExpenses, us-gaap:NonUs, regn:BayerCollaborationAgreement


Research
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value125.38.17.02.04.6
Percentage of ResearchAndDevelopmentExpense1.90.71.41.10.20.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.60.30.40.30.10.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:RegeneronsShareOfResearchAndDevelopmentExpenses us-gaap:NonUs regn:BayerCollaborationAgreement0.00.00.00.00.00.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value513825282422229419521828216920481933171119271663160815111582150014701319122612201212120010981137998869802725665625610597457439414427304231122102107112133105115103
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax regn:SalesMilestones, us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:SalesMilestoneOne, regn:SalesBasedMilestone, regn:SanofiCollaborationAgreementAntibody


Revenue
Period End2020-09-30
Value50
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:SalesMilestoneOne regn:SalesBasedMilestone regn:SanofiCollaborationAgreementAntibody100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService

regn:CollaborationRevenue


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value954754513528
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.629.826.328.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.629.826.328.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:CollaborationRevenue100.0100.0100.0100.0

us-gaap:Product


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value413717241621148212261236128612381205110410961025996987978957924
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax80.568.266.964.662.967.659.360.562.364.556.961.662.065.461.963.862.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax80.568.266.964.662.967.659.360.562.364.556.961.662.065.461.963.862.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Product100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductAndServiceOther


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value465021163
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.92.010.93.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.92.010.93.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductAndServiceOther100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:ReimbursementForManufacturingOfCommercialSupplies, regn:SanofiCollaborationAgreementAntibody


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value939410080737843143340
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.84.15.24.43.43.82.30.81.72.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.84.15.24.43.43.82.30.81.72.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:ReimbursementForManufacturingOfCommercialSupplies regn:SanofiCollaborationAgreementAntibody100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

regn:ReimbursementForManufacturingOfCommercialSupplies, regn:SanofiCollaborationAgreementImmunooncology


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value2.90.93.02.10.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.00.20.10.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.00.20.10.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:ReimbursementForManufacturingOfCommercialSupplies regn:SanofiCollaborationAgreementImmunooncology100.0100.0100.0100.00.00.0

regn:SalesBasedMilestone, regn:SanofiCollaborationAgreementAntibody


Revenue
Period End2020-12-312020-09-30
Value0.050
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.02.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.02.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:SalesBasedMilestone regn:SanofiCollaborationAgreementAntibody0.0100.0

regn:ShareOfProfitLossesInConnectionWithCommercialization, regn:SanofiCollaborationAgreementAntibody


Revenue
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value2121711709438-27.8-38.9-68.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.38.89.34.62.0-1.6-2.3-4.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.38.89.34.62.0-1.6-2.3-4.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:ShareOfProfitLossesInConnectionWithCommercialization regn:SanofiCollaborationAgreementAntibody100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductAndServiceOther, regn:BayerCollaborationAgreement


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value360299244281320302289276301264262247
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.913.112.515.414.814.814.916.115.615.916.316.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.913.112.515.414.814.814.916.115.615.916.316.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductAndServiceOther regn:BayerCollaborationAgreement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductAndServiceOther, regn:OtherRevenue


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value12315821163-104.21039022-185.5117110
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.16.910.93.5-4.85.04.71.3-9.67.16.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.16.910.93.5-4.85.04.71.3-9.67.16.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductAndServiceOther regn:OtherRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductAndServiceOther, regn:SanofiCollaborationAgreement


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value317353269246427404349246427256237189199245222
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.115.413.813.519.719.718.114.422.215.414.812.512.616.315.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.115.413.813.519.719.718.114.422.215.414.812.512.616.315.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductAndServiceOther regn:SanofiCollaborationAgreement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject, us-gaap:IncomeStatementLocation

regn:AmountsRecognizedInConnectionWithUpFrontPayments, regn:SanofiCollaborationAgreementImmunooncology, us-gaap:OtherOperatingIncomeExpense


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value20222016
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.91.10.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.91.10.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:AmountsRecognizedInConnectionWithUpFrontPayments regn:SanofiCollaborationAgreementImmunooncology us-gaap:OtherOperatingIncomeExpense100.0100.0100.0100.0

regn:CasirivimabAndImdevimab, regn:RocheCollaborationAgreement, regn:CollaborationRevenue


Revenue
Period End2021-06-302021-03-31
Value16766
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.32.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.32.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:CasirivimabAndImdevimab regn:RocheCollaborationAgreement regn:CollaborationRevenue100.0100.0

regn:RegeneronsShareOfCommercialExpenses, regn:SanofiCollaborationAgreementImmunooncology, us-gaap:SellingGeneralAndAdministrativeExpenses


Revenue
Period End2021-06-302020-06-30
Value-10.9-4.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.2-0.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.2-0.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:RegeneronsShareOfCommercialExpenses regn:SanofiCollaborationAgreementImmunooncology us-gaap:SellingGeneralAndAdministrativeExpenses100.0100.0

regn:RegeneronsShareOfResearchAndDevelopmentExpenses, regn:SanofiCollaborationAgreementAntibody, us-gaap:ResearchAndDevelopmentExpense


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value-10.6-11.9-24.9-16.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.2-0.5-1.3-0.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.2-0.5-1.3-0.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:RegeneronsShareOfResearchAndDevelopmentExpenses regn:SanofiCollaborationAgreementAntibody us-gaap:ResearchAndDevelopmentExpense100.0100.0100.0100.0

regn:ReimbursementForManufacturingOfCommercialSupplies, regn:SanofiCollaborationAgreementAntibody, regn:CollaborationRevenue


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value11010510080
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.24.25.24.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.24.25.24.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:ReimbursementForManufacturingOfCommercialSupplies regn:SanofiCollaborationAgreementAntibody regn:CollaborationRevenue100.0100.0100.0100.0

regn:ReimbursementForManufacturingOfCommercialSupplies, regn:SanofiCollaborationAgreementImmunooncology, regn:CollaborationRevenue


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value2.74.73.02.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.20.20.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.20.20.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:ReimbursementForManufacturingOfCommercialSupplies regn:SanofiCollaborationAgreementImmunooncology regn:CollaborationRevenue100.0100.0100.0100.0

regn:ReimbursementOfCommercializationRelatedExpenses, regn:SanofiCollaborationAgreementAntibody, us-gaap:SellingGeneralAndAdministrativeExpenses


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value78608691
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.52.44.45.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.52.44.45.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:ReimbursementOfCommercializationRelatedExpenses regn:SanofiCollaborationAgreementAntibody us-gaap:SellingGeneralAndAdministrativeExpenses100.0100.0100.0100.0

regn:ReimbursementOfCommercializationRelatedExpenses, regn:SanofiCollaborationAgreementImmunooncology, us-gaap:SellingGeneralAndAdministrativeExpenses


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value20181410
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.70.70.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.70.70.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:ReimbursementOfCommercializationRelatedExpenses regn:SanofiCollaborationAgreementImmunooncology us-gaap:SellingGeneralAndAdministrativeExpenses100.0100.0100.0100.0

regn:ReimbursementOfResearchAndDevelopmentExpenses, regn:SanofiCollaborationAgreementAntibody, us-gaap:ResearchAndDevelopmentExpense


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value46305177
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.91.22.64.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.91.22.64.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:ReimbursementOfResearchAndDevelopmentExpenses regn:SanofiCollaborationAgreementAntibody us-gaap:ResearchAndDevelopmentExpense100.0100.0100.0100.0

regn:ReimbursementOfResearchAndDevelopmentExpenses, regn:SanofiCollaborationAgreementImmunooncology, us-gaap:ResearchAndDevelopmentExpense


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value22214739
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.92.42.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.92.42.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:ReimbursementOfResearchAndDevelopmentExpenses regn:SanofiCollaborationAgreementImmunooncology us-gaap:ResearchAndDevelopmentExpense100.0100.0100.0100.0

regn:SanofisShareofLibtayoU.S.GrossProfits, regn:SanofiCollaborationAgreementImmunooncology, regn:CostOfGoodsSold


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value-34.4-30.4-28.2-26.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.7-1.2-1.4-1.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.7-1.2-1.4-1.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:SanofisShareofLibtayoU.S.GrossProfits regn:SanofiCollaborationAgreementImmunooncology regn:CostOfGoodsSold100.0100.0100.0100.0

regn:ShareOfProfitLossesInConnectionWithCommercialization, regn:SanofiCollaborationAgreementAntibody, regn:CollaborationRevenue


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value327260171170
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.410.38.89.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.410.38.89.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:ShareOfProfitLossesInConnectionWithCommercialization regn:SanofiCollaborationAgreementAntibody regn:CollaborationRevenue100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService, us-gaap:StatementGeographical

regn:ArcalystNetProductSales, country:US


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.02.23.83.62.73.03.83.04.23.52.753.7064.3843.93.9874.0884.667
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.10.20.20.10.20.20.10.20.20.10.20.30.30.30.30.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.10.20.20.10.20.20.10.20.20.10.20.30.30.30.30.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:ArcalystNetProductSales country:US0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

regn:Evkeeza, country:US


Revenue
Period End2021-06-302021-03-31
Value2.00.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:Evkeeza country:US100.0100.0

regn:EyleaNetProductSales, country:US


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value142413471343131811131172122211871160107410781021991984974953919
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.753.355.457.557.164.156.358.060.062.756.061.461.765.161.663.562.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.753.355.457.557.164.156.358.060.062.756.061.461.765.161.663.562.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:EyleaNetProductSales country:US100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

regn:LIBTAYONetProductSales, country:US


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value78697471636160474026140.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.52.73.13.13.23.42.82.32.11.60.80.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.52.73.13.13.23.42.82.32.11.60.80.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:LIBTAYONetProductSales country:US100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

regn:PraluentNetProductSales, country:US


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value4143554847
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.81.72.32.12.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.81.72.32.12.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:PraluentNetProductSales country:US100.0100.0100.0100.0100.0

regn:REGNCOV2, country:US


Revenue
Period End2021-06-302021-03-312020-09-30
Value259126240
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax50.410.41.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax50.410.41.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:REGNCOV2 country:US100.0100.0100.0

us-gaap:Product, country:US


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1621148212261236128612381205110410961025996987978957924
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax66.964.662.967.659.360.562.364.556.961.662.065.461.963.862.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax66.964.662.967.659.360.562.364.556.961.662.065.461.963.862.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Product country:US100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService, us-gaap:StatementGeographical, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:NetProfitInConnectionWithCommercialization, us-gaap:NonUs, regn:BayerCollaborationAgreement


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value335287230253298275269249270243246232
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.812.611.813.913.713.413.914.614.014.615.315.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.812.611.813.913.713.413.914.614.014.615.315.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:NetProfitInConnectionWithCommercialization us-gaap:NonUs regn:BayerCollaborationAgreement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

regn:ReimbursementForManufacturingOfCommercialSupplies, us-gaap:NonUs, regn:BayerCollaborationAgreement


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2512132712188.214
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.00.50.71.50.60.90.40.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.00.50.71.50.60.90.40.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:ReimbursementForManufacturingOfCommercialSupplies us-gaap:NonUs regn:BayerCollaborationAgreement100.0100.0100.0100.0100.0100.0100.0100.0

regn:ShareOfProfitLossesInConnectionWithCommercialization, us-gaap:NonUs, regn:SanofiCollaborationAgreementImmunooncology


Revenue
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-4.7-6.4-6.2-4.6-6.9-4.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.2-0.3-0.3-0.2-0.4-0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.2-0.3-0.3-0.2-0.4-0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:ShareOfProfitLossesInConnectionWithCommercialization us-gaap:NonUs regn:SanofiCollaborationAgreementImmunooncology100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService, us-gaap:StatementGeographical, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject, us-gaap:IncomeStatementLocation

regn:NetProfitInConnectionWithCommercialization, us-gaap:NonUs, regn:BayerCollaborationAgreement, regn:CollaborationRevenue


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value335308230253
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.512.211.813.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.512.211.813.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:NetProfitInConnectionWithCommercialization us-gaap:NonUs regn:BayerCollaborationAgreement regn:CollaborationRevenue100.0100.0100.0100.0

regn:RegeneronsShareOfResearchAndDevelopmentExpenses, us-gaap:NonUs, regn:BayerCollaborationAgreement, us-gaap:ResearchAndDevelopmentExpense


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value-10.9-12.5-5.3-8.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.2-0.5-0.3-0.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.2-0.5-0.3-0.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:RegeneronsShareOfResearchAndDevelopmentExpenses us-gaap:NonUs regn:BayerCollaborationAgreement us-gaap:ResearchAndDevelopmentExpense100.0100.0100.0100.0

regn:ReimbursementForManufacturingOfCommercialSupplies, us-gaap:NonUs, regn:BayerCollaborationAgreement, regn:CollaborationRevenue


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value13131327
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.50.71.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.50.71.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:ReimbursementForManufacturingOfCommercialSupplies us-gaap:NonUs regn:BayerCollaborationAgreement regn:CollaborationRevenue100.0100.0100.0100.0

regn:ReimbursementOfResearchAndDevelopmentExpenses, us-gaap:NonUs, regn:BayerCollaborationAgreement, us-gaap:ResearchAndDevelopmentExpense


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value9.9101012
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.40.60.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.40.60.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:ReimbursementOfResearchAndDevelopmentExpenses us-gaap:NonUs regn:BayerCollaborationAgreement us-gaap:ResearchAndDevelopmentExpense100.0100.0100.0100.0

regn:ShareOfProfitLossesInConnectionWithCommercialization, us-gaap:NonUs, regn:SanofiCollaborationAgreementImmunooncology, regn:CollaborationRevenue


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value-3.5-6.1-6.4-6.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.1-0.2-0.3-0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.1-0.2-0.3-0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax regn:ShareOfProfitLossesInConnectionWithCommercialization us-gaap:NonUs regn:SanofiCollaborationAgreementImmunooncology regn:CollaborationRevenue100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical

country:US


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value4137172412261236
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax80.568.262.967.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax80.568.262.967.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:US100.0100.0100.0100.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value513825282422229419521828216920481933171119271663160815111582150014701318122612201212120010981137998869802725665625610597457439414427304231122102107112133105115103
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:SellingGeneralAndAdministrativeExpense


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value41440530332634836758641941741049136936433040930630629632527029228929420917415817514910210882977277574647583632242320151414
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.116.012.514.317.820.127.020.521.624.025.522.222.721.925.920.420.922.526.622.124.124.126.918.517.518.321.820.615.417.413.416.315.817.613.911.015.725.229.632.022.820.915.414.812.713.7

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value214851777217163160841442815757148051393913173128541173410805995193728764870181067817697368286204590456095182452641983871373934563260295126402378227520801660145713501323983104610741089741
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value635857956138595853713624371534343417341029772937276528052620264925852951252423362128213919541886118812271329118710871049998950884869835854862846837554568556561344
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets29.632.635.837.037.223.025.124.625.926.525.427.227.829.929.930.531.937.836.234.234.336.234.836.426.329.234.331.831.532.233.936.037.238.240.151.559.262.763.356.454.351.851.646.5

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value214851777217163160841442815757148051393913173128541173410805995193728764870181067817697368286204590456095182452641983871373934563260295126402378227520801660145713501323983104610741089741
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value151271197711025101259057121331108910504975594448757786871866567614460515520486644494491407637653654329633382971254225512368221119521690149314061245806594504485428478518527348371386396421459
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets70.467.464.263.062.877.074.975.474.173.574.672.872.270.170.169.568.162.263.865.865.763.865.263.673.770.865.768.268.567.866.164.062.861.859.948.540.837.336.743.645.748.248.40.00.00.053.50.00.0

us-gaap:StockholdersEquity us-gaap:StatementClassOfStock

us-gaap:CommonStock


Stockholders
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value0.10.10.10.10.10.10.10.10.10.10.10.10.110.1080.1060.1020.0970.0950.091
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value1516293035-9.12116152.8-12.3-10.5-11.6-15.70.64-12.848.57252264.2631.465-1.188-2.851-3.429-1.644-1.166-1.904-2.371-1.337-1.862-1.731-0.904-2.175-2.491-0.175-0.3060.7171.044-0.1140.17
Percentage of StockholdersEquity0.10.10.30.30.4-0.10.20.20.20.0-0.1-0.1-0.2-0.20.0-0.30.22.11.10.20.1-0.1-0.2-0.2-0.1-0.1-0.2-0.4-0.3-0.4-0.4-0.2-0.4-0.5-0.1-0.10.20.3-0.00.0
Percentage of Assets0.10.10.20.20.2-0.10.10.10.10.0-0.1-0.1-0.1-0.20.0-0.20.21.30.70.10.0-0.0-0.1-0.1-0.1-0.1-0.1-0.2-0.1-0.1-0.2-0.1-0.2-0.20.00.00.00.10.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value7225688767166592626352114428438842634160391138413712361135123029309924042423234222362045188218271826176317951775176017541643163016091575137913681357133612941253
Percentage of StockholdersEquity47.857.560.965.169.143.039.941.843.744.144.748.851.755.057.268.184.894.695.098.9101.2104.8111.4122.4129.8141.6222.7298.6349.4361.3383.8341.1310.6298.5396.2368.7351.3336.9307.2272.8
Percentage of Assets33.638.839.141.043.433.129.931.532.432.433.335.537.338.540.143.555.362.164.867.868.669.371.376.880.284.8108.1121.8130.4132.6167.2155.7149.8144.60.00.00.0180.30.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value0.10.10.10.10.10.10.10.10.0990.0970.0970.0970.0950.0950.0940.0940.0930.0910.090.0890.0890.0870.080.080.080.0790.0780.077
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value151071200810893974389018004737965875918572552544433383932872946174885225514565-27.249-92.692-189.498-330.804-418.18-517.054-987.461-1178.929-1255.672-1267.323-1213.88-1151.515-1089.01-1045.563-1030.966-997.091-971.617-941.095-873.265-794.136
Percentage of StockholdersEquity99.9100.398.896.298.366.066.562.760.760.660.056.453.450.148.039.323.310.05.72.8-1.2-4.7-11.2-22.2-29.7-41.5-122.5-198.3-249.1-260.9-283.4-240.9-210.2-198.1-296.2-268.6-251.5-237.2-207.2-172.9
Percentage of Assets70.367.663.560.661.750.849.847.344.944.544.841.038.635.133.625.115.26.63.91.9-0.8-3.1-7.2-13.9-18.4-24.9-59.5-80.9-93.0-95.7-123.5-110.0-101.4-96.00.00.00.0-127.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312014-09-302014-06-302013-12-312013-09-302013-06-302012-12-312011-12-31
Value-7221.4-6935.3-6613.3-6242.0-6142.9-1073.8-739.9-488.4-441.8-444.2-396.4-396.4-353.8-316.2-316.24-316.24-306.069-169.53-43.849-43.8480.00.00.00.00.0
Percentage of StockholdersEquity-47.7-57.9-60.0-61.6-67.8-8.9-6.7-4.6-4.5-4.7-4.5-5.0-4.9-4.8-5.1-7.1-8.4-6.7-1.7-1.90.00.00.00.00.0
Percentage of Assets-33.6-39.0-38.5-38.8-42.6-6.8-5.0-3.5-3.4-3.5-3.4-3.7-3.6-3.4-3.6-4.5-5.5-4.4-1.2-1.30.00.00.00.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1333710055977990977860864476897109665169286447571948144544433541353860366931803501320931332915267522832310216722001918187117961634156113071206948769696652339413325357425
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets62.156.657.056.654.554.951.951.050.553.954.952.948.448.549.547.547.646.945.651.351.753.152.051.650.455.056.058.855.557.460.961.965.757.458.057.152.851.649.334.639.530.332.857.4

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value2072143721931573199222081617138410451708146710879171019812792744811535920646604809654390507648646600461535263381180230118171394483206254135112325112117207247498
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.68.112.89.813.814.010.99.97.913.312.510.19.210.99.39.19.210.47.713.510.410.214.412.68.612.116.817.317.414.218.110.016.07.911.17.211.829.236.521.024.312.610.30.00.00.027.90.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value2084145022071586200422201630139710581721148011009301031825804756824547809
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.78.212.99.913.914.111.010.08.013.412.610.29.311.09.49.29.310.57.914.4

Marketable Securities Current

us-gaap:MarketableSecuritiesCurrent

us-gaap:MarketableSecuritiesCurrent


Marketable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value183820651393145211521795159614931624152313421104765605596586523495503488398244236241213234251395216186158182155127771431293743395591136134
Percentage of MarketableSecuritiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.611.68.19.08.011.410.810.712.311.911.410.27.76.56.86.76.56.37.27.16.44.14.24.74.75.66.510.66.35.75.46.96.65.63.78.68.92.83.34.05.38.512.618.1

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value69984173311130921991206321002027192017281723166515341531153815321420133913431332143114501152108810711015739673664801787855767703593506349159283.6592.9213.765132.865
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets32.623.518.119.213.813.114.214.514.613.414.715.415.416.317.617.617.517.119.319.523.124.620.521.023.724.219.118.019.224.626.732.432.330.928.530.524.011.82.10.40.30.41.20.4

us-gaap:AccountsReceivableNetCurrent us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:TradeAccountsReceivable


Accounts
Period End2021-06-302021-03-312020-12-31
Value588131733112
Percentage of AccountsReceivableNetCurrent84.076.0100.0
Percentage of Assets27.417.918.1
Percentage of Assets us-gaap:TradeAccountsReceivable0.00.00.0

us-gaap:AccountsReceivableNetCurrent us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:BayerCollaborationAgreement


Accounts
Period End2021-06-302021-03-312020-12-31
Value342320336
Percentage of AccountsReceivableNetCurrent4.97.710.8
Percentage of Assets1.61.82.0
Percentage of Assets regn:BayerCollaborationAgreement0.00.00.0

regn:RocheCollaborationAgreement


Accounts
Period End2021-06-302021-03-312020-12-31
Value20921977
Percentage of AccountsReceivableNetCurrent3.05.32.5
Percentage of Assets1.01.20.4
Percentage of Assets regn:RocheCollaborationAgreement0.00.00.0

regn:SanofiCollaborationAgreementAntibody


Accounts
Period End2021-06-302021-03-312020-12-31
Value474362407
Percentage of AccountsReceivableNetCurrent6.88.713.1
Percentage of Assets2.22.02.4
Percentage of Assets regn:SanofiCollaborationAgreementAntibody0.00.00.0

regn:SanofiCollaborationAgreementImmunooncology


Accounts
Period End2021-06-302021-03-312020-12-31
Value6.87.46.5
Percentage of AccountsReceivableNetCurrent0.10.20.2
Percentage of Assets0.00.00.0
Percentage of Assets regn:SanofiCollaborationAgreementImmunooncology0.00.00.0

regn:TevaPharmaceuticalsCollaborationAgreement


Accounts
Period End2021-06-302021-03-312020-12-31
Value112027
Percentage of AccountsReceivableNetCurrent0.20.50.9
Percentage of Assets0.10.10.2
Percentage of Assets regn:TevaPharmaceuticalsCollaborationAgreement0.00.00.0

Inventory Net

us-gaap:InventoryNet

us-gaap:InventoryNet


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value19832164191618011640148014151344131712081151103992882072664155446639934531630323819017113312812010986706357432829106.23.5
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.212.211.211.211.49.49.69.610.09.49.89.69.38.88.37.46.86.05.75.15.15.14.33.73.83.23.33.23.22.72.42.42.41.91.41.80.70.50.3

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value444213160230263226387226208182243284163155224143193146130103961151638943347161605296156108975684322622151915
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.11.20.91.41.81.42.61.61.61.42.12.61.61.72.61.72.41.91.91.51.52.02.91.71.00.81.81.71.81.63.35.94.64.32.75.12.21.91.71.61.81.4

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value33583262322131383031294428902771267626122575252424612394235822742261227720831872177216661594147513261110974818707600526453419392379372372369367363361357347259
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets15.618.418.819.521.018.719.519.920.320.322.023.424.725.626.926.127.929.129.927.428.628.228.428.529.326.525.221.920.518.417.917.217.617.218.322.525.527.427.837.034.633.331.935.0

Deferred Tax Assets Liabilities Net

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:DeferredTaxAssetsLiabilitiesNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value7187916705068254613162763420.00.0
Percentage of DeferredTaxAssetsLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0
Percentage of Assets4.25.35.75.811.88.28.29.416.50.00.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value14214516816817516114413713914412712585787736363720206.7155.7915.814.5834.1384.4733.0343.4168.8775.345.3274.409152023181920191312106.7897.338
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.81.01.01.21.01.01.01.11.11.11.20.90.80.90.40.50.50.30.30.10.10.10.10.10.10.10.10.30.20.20.20.60.91.11.11.31.51.41.31.21.00.61.0

Equity Securities Fv Ni

us-gaap:EquitySecuritiesFvNi regn:ClassificationOfInvestment, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:EquitySecuritiesFvNi

regn:Restricted, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value13529247917207515105574962660.00.0
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0
Percentage of Assets6.35.24.64.55.23.23.80.40.50.50.00.0
Percentage of Assets regn:Restricted us-gaap:FairValueInputsLevel1 us-gaap:FairValueMeasurementsRecurring0.00.00.00.00.00.00.00.00.00.00.00.0

regn:Restricted, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Equity
Period End2021-06-302020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1816150.00.03332847.84453
Percentage of EquitySecuritiesFvNi1.32.32.00.00.0676.5457.911.80.00.0
Percentage of Assets0.10.10.10.00.02.42.20.10.40.5
Percentage of Assets regn:Restricted us-gaap:FairValueInputsLevel2 us-gaap:FairValueMeasurementsRecurring0.00.00.00.00.00.00.00.00.00.0

regn:Unrestricted, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value3077484137516146675643908562
Percentage of EquitySecuritiesFvNi2.28.46.15.75.010.111.195.1107.786.20.00.00.00.0
Percentage of Assets0.10.40.30.30.30.30.40.30.50.40.40.80.90.7
Percentage of Assets regn:Unrestricted us-gaap:FairValueInputsLevel1 us-gaap:FairValueMeasurementsRecurring0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EquitySecuritiesFvNi regn:ClassificationOfInvestment, us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

regn:Restricted, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring


Equity
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value924791736767510557382347734453
Percentage of EquitySecuritiesFvNi100.0100.0102.3102.0100.0100.0776.5557.9111.80.00.0
Percentage of Assets5.24.64.65.33.23.82.72.60.60.40.5
Percentage of Assets regn:Restricted us-gaap:EstimateOfFairValueFairValueDisclosure us-gaap:FairValueMeasurementsRecurring0.00.00.00.00.00.00.00.00.00.00.0

regn:Unrestricted, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring


Equity
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value77484137516146675643908562
Percentage of EquitySecuritiesFvNi8.46.15.75.010.111.195.1107.786.20.00.00.00.0
Percentage of Assets0.40.30.30.30.30.40.30.50.40.40.80.90.7
Percentage of Assets regn:Unrestricted us-gaap:EstimateOfFairValueFairValueDisclosure us-gaap:FairValueMeasurementsRecurring0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EquitySecuritiesFvNi regn:ClassificationOfInvestment, us-gaap:FairValueByMeasurementFrequency

regn:Restricted, us-gaap:FairValueMeasurementsRecurring


Equity
Period End2021-06-302020-12-31
Value1370791
Percentage of EquitySecuritiesFvNi101.3100.0
Percentage of Assets6.44.6
Percentage of Assets regn:Restricted us-gaap:FairValueMeasurementsRecurring0.00.0

regn:Unrestricted, us-gaap:FairValueMeasurementsRecurring


Equity
Period End2021-06-302020-12-31
Value3048
Percentage of EquitySecuritiesFvNi2.26.1
Percentage of Assets0.10.3
Percentage of Assets regn:Unrestricted us-gaap:FairValueMeasurementsRecurring0.00.0

Accounts Payable And Accrued Liabilities Current

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent


Accounts
Period End2020-12-312019-12-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value152110867728158187161061879714759733644577529462484337283237250219153145111124126106957881585349
Percentage of AccountsPayableAndAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.97.36.69.39.48.813.612.610.512.212.411.511.111.711.012.59.08.27.38.58.36.56.45.47.58.77.97.28.07.85.54.96.6

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2020-12-312019-12-312018-12-312017-12-31
Value475418218178
Percentage of AccountsPayableCurrent100.0100.0100.0100.0
Percentage of Assets2.82.81.92.0

Contract With Customer Liability Current

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:ContractWithCustomerLiabilityCurrent


Contract
Period End2021-06-302021-03-312020-12-312019-12-312018-12-312017-12-31
Value520464577591452320
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0
Percentage of Assets2.42.63.44.03.93.7

us-gaap:ContractWithCustomerLiabilityCurrent us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:OtherCollaborationAgreements


Contract
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value23685818171181168196205216180142
Percentage of ContractWithCustomerLiabilityCurrent40.90.00.00.012.10.00.00.045.50.00.044.5
Percentage of Assets1.40.50.60.50.51.31.31.51.82.01.81.6
Percentage of Assets regn:OtherCollaborationAgreements0.00.00.00.00.00.00.00.00.00.00.00.0

regn:SanofiCollaborationAgreement


Contract
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value341409380398395427424334246246308177
Percentage of ContractWithCustomerLiabilityCurrent59.10.00.00.066.80.00.00.054.50.00.055.5
Percentage of Assets2.02.52.62.52.73.13.22.62.12.33.12.0
Percentage of Assets regn:SanofiCollaborationAgreement0.00.00.00.00.00.00.00.00.00.00.00.0

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value373232172697233737022055209617651713151114421417133112651135113810291308124196195191981173460153665441035130529826820319716317818316014813313511210993
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets17.418.115.714.525.713.014.212.713.011.812.313.113.413.513.013.112.716.717.814.115.315.614.514.213.312.816.911.010.29.410.110.28.68.77.910.812.611.911.213.613.010.410.012.6

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent


Other
Period End2020-12-312019-12-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value329301164129847999103831071028512672971175548382938192219221518148.2087.816.441
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.92.01.41.51.01.01.31.51.21.71.71.52.41.62.33.01.51.41.21.01.50.81.00.91.31.01.31.10.80.70.6

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value1229610385850.2670.3340.3970.8763.4613.5863.69513132.5062.2912.185960.939
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.60.70.50.60.00.00.00.00.00.10.10.20.20.00.10.12.50.0

Taxes Payable Current

us-gaap:TaxesPayableCurrent

us-gaap:TaxesPayableCurrent


Taxes
Period End2020-12-312019-12-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value1949200.227126234502351551701440.0
Percentage of TaxesPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.10.30.20.01.50.35.83.42.32.72.40.0

Long Term Debt

us-gaap:LongTermDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LongTermDebt

regn:SeniorUnsecuredNotesDue2030, us-gaap:SeniorNotes


Long
Period End2021-06-302021-03-312020-12-31
Value123912391238
Percentage of LongTermDebt100.0100.0100.0
Percentage of Assets5.87.07.2
Percentage of Assets regn:SeniorUnsecuredNotesDue2030 us-gaap:SeniorNotes0.00.00.0

regn:SeniorUnsecuredNotesDue2050, us-gaap:SeniorNotes


Long
Period End2021-06-302021-03-312020-12-31
Value739739739
Percentage of LongTermDebt59.759.759.7
Percentage of Assets3.44.24.3
Percentage of Assets regn:SeniorUnsecuredNotesDue2050 us-gaap:SeniorNotes0.00.00.0

us-gaap:LongTermDebt us-gaap:LongtermDebtType

us-gaap:SeniorNotes


Long
Period End2021-06-302021-03-312020-12-31
Value197919781978
Percentage of LongTermDebt159.7159.7159.7
Percentage of Assets9.211.111.5
Percentage of Assets us-gaap:SeniorNotes0.00.00.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-30
Value1979197819781978
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0
Percentage of Assets9.211.111.512.3

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value596571687454457321286273267376361194190169152125115106100135119120115777655402314111110108.7867.2596.9877.2627.4556.4437.4056.8067.187.353.959
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.83.24.02.83.22.01.92.02.02.93.11.81.91.81.71.41.41.41.42.01.92.02.11.51.71.31.10.60.40.40.40.40.40.40.30.40.50.60.50.80.70.70.70.5

us-gaap:OtherLiabilitiesNoncurrent us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:OtherCollaborationAgreements


Other
Period End2020-12-312019-12-31
Value497317
Percentage of OtherLiabilitiesNoncurrent72.4111.1
Percentage of Assets2.92.1
Percentage of Assets regn:OtherCollaborationAgreements0.00.0

regn:SanofiCollaborationAgreement


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value189367390450482
Percentage of OtherLiabilitiesNoncurrent27.680.885.2140.1168.5
Percentage of Assets1.12.32.72.93.3
Percentage of Assets regn:SanofiCollaborationAgreement0.00.00.00.00.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value151271197711025101259057121331108910504975594448757786871866567614460515520486644494491407637653654329633382971254225512368221119521690149314061245806594504485428478518527348371386396421459
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets70.467.464.263.062.877.074.975.474.173.574.672.872.270.170.169.568.162.263.865.865.763.865.263.673.770.865.768.268.567.866.164.062.861.859.948.540.837.336.743.645.748.248.40.00.00.053.50.00.0

us-gaap:StockholdersEquity us-gaap:StatementClassOfStock

us-gaap:CommonStock


Stockholders
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value0.10.10.10.10.10.10.10.10.10.10.10.10.110.1080.1060.1020.0970.0950.091
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value1516293035-9.12116152.8-12.3-10.5-11.6-15.70.64-12.848.57252264.2631.465-1.188-2.851-3.429-1.644-1.166-1.904-2.371-1.337-1.862-1.731-0.904-2.175-2.491-0.175-0.3060.7171.044-0.1140.17
Percentage of StockholdersEquity0.10.10.30.30.4-0.10.20.20.20.0-0.1-0.1-0.2-0.20.0-0.30.22.11.10.20.1-0.1-0.2-0.2-0.1-0.1-0.2-0.4-0.3-0.4-0.4-0.2-0.4-0.5-0.1-0.10.20.3-0.00.0
Percentage of Assets0.10.10.20.20.2-0.10.10.10.10.0-0.1-0.1-0.1-0.20.0-0.20.21.30.70.10.0-0.0-0.1-0.1-0.1-0.1-0.1-0.2-0.1-0.1-0.2-0.1-0.2-0.20.00.00.00.10.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value7225688767166592626352114428438842634160391138413712361135123029309924042423234222362045188218271826176317951775176017541643163016091575137913681357133612941253
Percentage of StockholdersEquity47.857.560.965.169.143.039.941.843.744.144.748.851.755.057.268.184.894.695.098.9101.2104.8111.4122.4129.8141.6222.7298.6349.4361.3383.8341.1310.6298.5396.2368.7351.3336.9307.2272.8
Percentage of Assets33.638.839.141.043.433.129.931.532.432.433.335.537.338.540.143.555.362.164.867.868.669.371.376.880.284.8108.1121.8130.4132.6167.2155.7149.8144.60.00.00.0180.30.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value0.10.10.10.10.10.10.10.10.0990.0970.0970.0970.0950.0950.0940.0940.0930.0910.090.0890.0890.0870.080.080.080.0790.0780.077
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value151071200810893974389018004737965875918572552544433383932872946174885225514565-27.249-92.692-189.498-330.804-418.18-517.054-987.461-1178.929-1255.672-1267.323-1213.88-1151.515-1089.01-1045.563-1030.966-997.091-971.617-941.095-873.265-794.136
Percentage of StockholdersEquity99.9100.398.896.298.366.066.562.760.760.660.056.453.450.148.039.323.310.05.72.8-1.2-4.7-11.2-22.2-29.7-41.5-122.5-198.3-249.1-260.9-283.4-240.9-210.2-198.1-296.2-268.6-251.5-237.2-207.2-172.9
Percentage of Assets70.367.663.560.661.750.849.847.344.944.544.841.038.635.133.625.115.26.63.91.9-0.8-3.1-7.2-13.9-18.4-24.9-59.5-80.9-93.0-95.7-123.5-110.0-101.4-96.00.00.00.0-127.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312014-09-302014-06-302013-12-312013-09-302013-06-302012-12-312011-12-31
Value-7221.4-6935.3-6613.3-6242.0-6142.9-1073.8-739.9-488.4-441.8-444.2-396.4-396.4-353.8-316.2-316.24-316.24-306.069-169.53-43.849-43.8480.00.00.00.00.0
Percentage of StockholdersEquity-47.7-57.9-60.0-61.6-67.8-8.9-6.7-4.6-4.5-4.7-4.5-5.0-4.9-4.8-5.1-7.1-8.4-6.7-1.7-1.90.00.00.00.00.0
Percentage of Assets-33.6-39.0-38.5-38.8-42.6-6.8-5.0-3.5-3.4-3.5-3.4-3.7-3.6-3.4-3.6-4.5-5.5-4.4-1.2-1.30.00.00.00.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue us-gaap:StatementClassOfStock

us-gaap:CommonStockValue

us-gaap:CommonStock


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0110000.0110000.0110000.0110000.0109000.0109000.0108000.0108000.0107000.0107000.0107000.0106000.0106000.0105000.0103000.0102000.0100000.0100000.099000.097000.097000.097000.095000.095000.091000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value72256887671665926263521144284388426341603911384137123611351235703449319030293314315630493099288031182812240424232342223620451882182718261763179517751760175416431630160915751336
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets33.638.839.141.043.433.129.931.532.432.433.335.537.338.540.141.042.640.843.548.550.951.655.355.668.967.062.164.867.868.669.371.376.880.284.8108.1121.8130.4132.6167.2155.7149.8144.6180.3

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value151071200810893974389018004737965875918572552544433383932872946277323841997174814951230101885269748729225514565-27.249-92.692-189.498-330.804-418.18-517.054-987.461-1178.929-1255.672-1267.323-1213.88-1151.515-1089.01-1045.563-941.095
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets70.367.663.560.661.750.849.847.344.944.544.841.038.635.133.631.929.425.525.121.919.817.215.213.510.87.06.63.91.9-0.8-3.1-7.2-13.9-18.4-24.9-59.5-80.9-93.0-95.7-123.5-110.0-101.4-96.0-127.0

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1516293035-9.12116152.8-12.3-10.519-11.612-15.5940.64232.348-5.884-12.84-2.8995.2044.3648.5727.721194752264.2631.465-1.188-2.851-3.429-1.644-1.166-1.904-2.371-1.337-1.862-1.731-0.904-2.175-2.4911.044
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.20.20.2-0.10.10.10.10.0-0.1-0.1-0.1-0.20.00.30.0-0.1-0.2-0.00.10.10.20.10.41.11.30.70.10.0-0.0-0.1-0.1-0.1-0.1-0.1-0.2-0.1-0.1-0.2-0.1-0.2-0.20.1

Treasury Stock Value

us-gaap:TreasuryStockValue

us-gaap:TreasuryStockValue


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value722169356613624261421073739488441444396396353316316316316316316316316307306288287181-169.5343-43.8480.0
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets33.639.038.538.842.66.85.03.53.43.53.43.73.63.43.63.63.94.04.54.65.15.25.55.66.34.3-4.41.2-1.30.0

Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-03-31
Value13513510410510811210911411611385827472825546455330201923151312148.834
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-03-31
Value13513510410510811210911411611385827472825546455330201923151312148.834
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value6266681231-254.3943698787557188897728452394618566414-30.5735537765141529281892243-87.50219816332753276921288693-2.382-78.377-87.041-50.317-46.735-34.05-10.58-43.729161-11.85-9.578
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.226.450.8-11.148.338.236.327.29.752.437.827.224.540.935.827.6-2.127.030.853.434.22.425.778.524.4-10.124.722.549.28.645.315.528.019.622.5-0.6-25.7-37.6-40.9-45.4-31.6-9.4-32.7152.4-10.2-9.3

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value125-1059.0-305.0-775.81453-443.2-208.7-207.0-836.0-776.1-265.907-286.708-484.973-425.412-335.746-358.884-170.409-140.143-271.356-405.853-326.01-43.685-123.3-283.171-371.649-129.48156-123.068-118.123-236.231-109.948-214.452116-147.68591-48.754-139.18815-33.908-0.90314220-351.744503.82-136.401
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.4-41.9-12.6-33.874.5-24.2-9.6-10.1-43.2-45.3-13.8-17.2-30.2-28.1-21.2-23.9-11.6-10.6-22.1-33.3-26.9-3.6-11.2-24.9-37.2-14.97.1-17.0-17.7-37.8-18.0-35.925.5-33.622.0-11.4-45.76.8-27.6-0.9132.618.1-263.147.33.3-131.7

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-118.2-366.4-305.3612-2612.8335-345.7-11.0-15.3119-83.0343.714-11.20713-210.535-8.19613360-491.67928-46.844-190.543-4.008-345.6491076-252.7635.93-71.391081053.533-43.48111-73.01-1.809-5.077-17.75361-0.27910131821.6132.71956
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.3-14.5-12.626.7-133.918.4-15.9-0.5-0.87.0-4.30.2-0.70.9-13.3-0.59.14.6-40.12.4-3.9-15.9-0.4-30.41.18.8-31.50.8-10.717.417.30.6-9.52.6-17.6-0.4-1.7-7.7293.9-0.39.311.6136.71.52.354.3

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value634-756.9620-418.1-216.0590233339-663.0240379169
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.3-29.925.6-18.2-11.132.310.716.6-34.314.119.710.2

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value71676159585654525251423533363437353828272522222015161414131111109.7029.4079.7789.3299.4178.4167.9448.2767.9026.9786.0864.8944.5244.183
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value282558801228-121.9169122041501064016395-30.4082.89112694137-32.252-108.099-113.253972844973219033-153.57292-101.046116731099116519713535-6.117-3.592-4.95610-12.909236.29
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInInventories


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-31.325212716916270108591095810699938878848169502610623031435.9329.983132115115.5981317
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value6266681231-254.3943698787557188897728452394618566414-30.5735537765141529281892243-87.50219816332753276921288693-2.382-78.377-87.041-50.317-46.735-34.05-10.58-43.729161-11.85-9.578
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.226.450.8-11.148.338.236.327.29.752.437.827.224.540.935.827.6-2.127.030.853.434.22.425.778.524.4-10.124.722.549.28.645.315.528.019.622.5-0.6-25.7-37.6-40.9-45.4-31.6-9.4-32.7152.4-10.2-9.3

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value309811151149842897624792669193461820594551477173388387248253264196165154210194761107992659614187984701917611-53.443-62.365-62.505-43.447-14.597-33.875-25.474-30.522
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax60.344.147.436.746.034.236.532.710.026.942.635.734.331.611.025.926.418.920.621.716.213.814.118.519.58.713.711.013.910.515.923.719.122.5113.544.825.25.0-43.5-60.6-58.0-38.7-10.9-32.0-22.0-29.5

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value309811158428976246691934615945514781007992659614187984701917611-53.443-62.365-62.505-43.447-14.597-33.875-25.474-30.522
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.091.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax60.344.136.746.034.232.710.026.935.834.331.612.511.013.910.515.923.719.122.5113.544.825.25.0-43.5-60.6-58.0-38.7-10.9-32.0-22.0-29.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value145130121101103105133117105107126111106821271251211331541311311421581029410381686481554544533020192315131214138.798.7078.834
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value125-1059.0-305.0-775.81453-443.2-208.7-207.0-836.0-776.1-265.907-286.708-484.973-425.412-335.746-358.884-170.409-140.143-271.356-405.853-326.01-43.685-123.3-283.171-371.649-129.48156-123.068-118.123-236.231-109.948-214.452116-147.68591-48.754-139.18815-33.908-0.90314220-351.744503.82-136.401
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.4-41.9-12.6-33.874.5-24.2-9.6-10.1-43.2-45.3-13.8-17.2-30.2-28.1-21.2-23.9-11.6-10.6-22.1-33.3-26.9-3.6-11.2-24.9-37.2-14.97.1-17.0-17.7-37.8-18.0-35.925.5-33.622.0-11.4-45.76.8-27.6-0.9132.618.1-263.147.33.3-131.7

Payments To Acquire Productive Assets

us-gaap:PaymentsToAcquireProductiveAssets

us-gaap:PaymentsToAcquireProductiveAssets


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value148115161153129170139121947485106112791075954501501181381041771462391141177970646831342115101211118.898142232222222
Percentage of PaymentsToAcquireProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-118.2-366.4-305.3612-2612.8335-345.7-11.0-15.3119-83.0343.714-11.20713-210.535-8.19613360-491.67928-46.844-190.543-4.008-345.6491076-252.7635.93-71.391081053.533-43.48111-73.01-1.809-5.077-17.75361-0.27910131821.6132.71956
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.3-14.5-12.626.7-133.918.4-15.9-0.5-0.87.0-4.30.2-0.70.9-13.3-0.59.14.6-40.12.4-3.9-15.9-0.4-30.41.18.8-31.50.8-10.717.417.30.6-9.52.6-17.6-0.4-1.7-7.7293.9-0.39.311.6136.71.52.354.3

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:ProceedsFromIssuanceOfLongTermDebt


Proceeds
Period End2020-12-31
Value0.0
Percentage of ProceedsFromIssuanceOfLongTermDebt0.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value305306381925052320246190.010.00.0224.3780.00.00.0
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.00.00.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value17.411.0-0.815.60.0240.066-0.0110.1290.1410.156-0.0920.0650.160.1830.0960.3130.2630.424-0.0230.2760.3290.498-0.0370.4650.4070.725-0.020.5470.5430.6270.0410.3740.4080.303
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value379.51337.24319.28295.98269.69236.75158.5498.156.03
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value7618026725538344833482773400.0
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2672101891461171165726115.59612
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

regn:GainContingencyInterPartesReviewFiledNumber us-gaap:LossContingenciesByNatureOfContingency, us-gaap:SubsequentEventType

regn:GainContingencyInterPartesReviewFiledNumber

regn:A631Patent, us-gaap:SubsequentEvent


Gain
Period End2020-07-16
Value2.0
Percentage of GainContingencyInterPartesReviewFiledNumber100.0

regn:Levelsoftwelvemonthsalesatwhichsalesmilestonepaymentswouldbereceived us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:Levelsoftwelvemonthsalesatwhichsalesmilestonepaymentswouldbereceived

regn:SanofiCollaborationAgreementAntibody


Levelsoftwelvemonthsalesatwhichsalesmilestonepaymentswouldbereceivedus-gaap:
Period End2020-12-312018-12-312018-09-30
Value5000.00.0
Percentage of Levelsoftwelvemonthsalesatwhichsalesmilestonepaymentswouldbereceived100.00.00.0

regn:MaximumTransactionAgreementPayments us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:MaximumTransactionAgreementPayments

regn:REGENCOV, regn:USGovernment


Maximum
Period End2021-01-31
Value2625
Percentage of MaximumTransactionAgreementPayments100.0

regn:MaximumTransactionAgreementPayments us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject, us-gaap:SubsequentEventType

regn:REGENCOV, regn:USGovernment, us-gaap:SubsequentEvent


Maximum
Period End2021-01-31
Value2625
Percentage of MaximumTransactionAgreementPayments100.0

regn:PercentageOfTrialCostsRequiredToBeFundedByCollaboratingParty us-gaap:Range, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:PercentageOfTrialCostsRequiredToBeFundedByCollaboratingParty

srt:Maximum, regn:SanofiCollaborationAgreementAntibody


Percentage
Period End2021-06-302021-03-31
Value0100.0
Percentage of PercentageOfTrialCostsRequiredToBeFundedByCollaboratingParty0.0100.0

srt:Minimum, regn:SanofiCollaborationAgreementAntibody


Percentage
Period End2021-06-302021-03-31
Value080.0
Percentage of PercentageOfTrialCostsRequiredToBeFundedByCollaboratingParty0.080.0

regn:ReimbursementOfOtherExpenses us-gaap:ProductOrService, us-gaap:StatementGeographical, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:ReimbursementOfOtherExpenses

regn:Other, us-gaap:NonUs, regn:BayerCollaborationAgreement


Reimbursement
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value2.01.61.73.74.18.8
Percentage of ReimbursementOfOtherExpenses100.0100.0100.0100.0100.0100.0

regn:ReimbursementOfResearchAndDevelopmentExpense us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:ReimbursementOfResearchAndDevelopmentExpense

regn:ReimbursementOfResearchAndDevelopmentExpenses, regn:SanofiCollaborationAgreementAntibody


Reimbursement
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value455177608174
Percentage of ReimbursementOfResearchAndDevelopmentExpense100.0100.0100.0100.0100.0100.0

regn:ReimbursementOfResearchAndDevelopmentExpenses, regn:SanofiCollaborationAgreementImmunooncology


Reimbursement
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value494739383646
Percentage of ReimbursementOfResearchAndDevelopmentExpense109.591.651.463.144.662.3

regn:ReimbursementOfResearchAndDevelopmentExpenses, regn:TevaPharmaceuticalsCollaborationAgreement


Reimbursement
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2725312520343632
Percentage of ReimbursementOfResearchAndDevelopmentExpense0.056.960.432.50.056.844.643.2

regn:ReimbursementOfResearchAndDevelopmentExpense us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject, us-gaap:IncomeStatementLocation

regn:CasirivimabAndImdevimab, regn:RocheCollaborationAgreement, us-gaap:ResearchAndDevelopmentExpense


Reimbursement
Period End2021-06-302021-03-31
Value4186
Percentage of ReimbursementOfResearchAndDevelopmentExpense0.00.0

regn:ReimbursementOfResearchAndDevelopmentExpenses, regn:TevaPharmaceuticalsCollaborationAgreement, us-gaap:ResearchAndDevelopmentExpense


Reimbursement
Period End2021-06-302021-03-312020-06-302020-03-31
Value11193125
Percentage of ReimbursementOfResearchAndDevelopmentExpense0.00.060.432.5

regn:ReimbursementOfResearchAndDevelopmentExpense us-gaap:ProductOrService, us-gaap:StatementGeographical, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:ReimbursementOfResearchAndDevelopmentExpenses, us-gaap:NonUs, regn:BayerCollaborationAgreement


Reimbursement
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1110125.08.02.6
Percentage of ReimbursementOfResearchAndDevelopmentExpense25.321.115.58.39.83.5

regn:ReimbursementOfSellingGeneralAndAdministrativeExpense us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:ReimbursementOfSellingGeneralAndAdministrativeExpense

regn:ReimbursementOfCommercializationRelatedExpenses, regn:SanofiCollaborationAgreementAntibody


Reimbursement
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value838691111121116
Percentage of ReimbursementOfSellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0

regn:ReimbursementOfCommercializationRelatedExpenses, regn:SanofiCollaborationAgreementImmunooncology


Reimbursement
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1414103.01.82.2
Percentage of ReimbursementOfSellingGeneralAndAdministrativeExpense17.416.611.42.71.51.9

regn:RevenueBasedOnPercentageOfAnnualSalesInJapan us-gaap:Range, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:RevenueBasedOnPercentageOfAnnualSalesInJapan

srt:Maximum, regn:BayerCollaborationAgreement


Revenue
Period End2021-06-302021-03-31
Value040.0
Percentage of RevenueBasedOnPercentageOfAnnualSalesInJapan0.0100.0

srt:Minimum, regn:BayerCollaborationAgreement


Revenue
Period End2021-06-302021-03-31
Value033.5
Percentage of RevenueBasedOnPercentageOfAnnualSalesInJapan0.083.8

regn:RevenuebasedonpercentageofannualsalesinJapan us-gaap:Range, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:RevenuebasedonpercentageofannualsalesinJapan

srt:Maximum, regn:BayerCollaborationAgreement


Revenuebasedonpercentageofannualsalesin
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value39.600.40000.4
Percentage of RevenuebasedonpercentageofannualsalesinJapan100.00.0100.00.00.00.0100.0

srt:Minimum, regn:BayerCollaborationAgreement


Revenuebasedonpercentageofannualsalesin
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value33.16500.3350000.335
Percentage of RevenuebasedonpercentageofannualsalesinJapan83.80.083.80.00.00.083.8

regn:StockIssuedDistributedDuringPeriodValueEmployeeBenefitPlan

regn:StockIssuedDistributedDuringPeriodValueEmployeeBenefitPlan


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-03-31
Value1410.09.910146.01110-0.7
Percentage of StockIssuedDistributedDuringPeriodValueEmployeeBenefitPlan100.0100.0100.0100.0100.0100.0100.0100.0100.0

regn:StockIssuedDistributedDuringPeriodValueEmployeeBenefitPlan us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-03-31
Value118.58.67.4123.99.34.3-0.7
Percentage of StockIssuedDistributedDuringPeriodValueEmployeeBenefitPlan82.385.086.973.385.665.079.541.0100.0

us-gaap:TreasuryStock


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value2.51.51.32.72.12.12.46.2
Percentage of StockIssuedDistributedDuringPeriodValueEmployeeBenefitPlan17.715.013.126.714.435.020.559.0

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value2666804161550.129104531911101.904631393703.08541101249-13.67811
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value2666804161550.129104531911101.904631393703.08541101249-13.67811
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities

us-gaap:AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-2472.2-446.781-1096.44673-4.6-112.3-4.8435-91.522-141.694-156.84714039326-418.314106124386203-136.39612668248-163.5238883235-11.916179-48.85140-12.626-377.222-193.85-155.12-98.6923.126152832-29.1321951320
Percentage of AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:CapitalExpendituresIncurredButNotYetPaid


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value1775-16.813147233
Percentage of CapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConcentrationRiskPercentage1 us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

us-gaap:ConcentrationRiskPercentage1

regn:BesseMedical, regn:GrossProductRevenue, us-gaap:CustomerConcentrationRisk


Concentration
Period End2021-06-302020-06-30
Value22.053.0
Percentage of ConcentrationRiskPercentage1100.0100.0

regn:BesseMedical, regn:GrossSalesRevenue, us-gaap:CustomerConcentrationRisk


Concentration
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value46.050.00.530.540.570.560.590.570.560.550.510.5
Percentage of ConcentrationRiskPercentage10.00.01.00.00.00.00.00.00.00.00.00.0

regn:McKessonCorporation, regn:GrossProductRevenue, us-gaap:CustomerConcentrationRisk


Concentration
Period End2021-06-302020-06-30
Value14.032.0
Percentage of ConcentrationRiskPercentage163.660.4

regn:McKessonCorporation, regn:GrossSalesRevenue, us-gaap:CustomerConcentrationRisk


Concentration
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value29.034.00.320.360.340.340.310.360.350.40.290.29
Percentage of ConcentrationRiskPercentage10.00.00.60.00.00.00.00.00.00.00.00.0

regn:USGovernment, regn:GrossProductRevenue, us-gaap:CustomerConcentrationRisk


Concentration
Period End2021-06-30
Value57.0
Percentage of ConcentrationRiskPercentage1259.1

regn:USGovernment, regn:GrossSalesRevenue, us-gaap:CustomerConcentrationRisk


Concentration
Period End2021-03-31
Value13.0
Percentage of ConcentrationRiskPercentage10.0

us-gaap:ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueModificationOfContract us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

us-gaap:ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueModificationOfContract

regn:SanofiIOTevaAndMTPCCollaborationAgreements


Contract
Period End2020-12-31
Value99
Percentage of ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueModificationOfContract100.0

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value40914362-37.5228-56.817615-116.942-62.94.9169.4-24.2275.8
Percentage of EquitySecuritiesFvNiUnrealizedGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value458-34.73859106-85.23249.6129-19.630112-9.675765.72118-334.927187146-26.487301031393510325855930-14.13941593.48732-18.252-3.558201214-3.3232513-20.3939.8935.46212
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInContractWithCustomerLiability


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value78-143.635335.073-81.8-25.3-25.4426-165.03854-29.738-54.5-53.984-48.461
Percentage of IncreaseDecreaseInContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-41.7-10.1420.1-108.1-9.920-15.311410106189.1216.366-427.051501640169278279556.90648103215135.761
Percentage of IncreaseDecreaseInDeferredIncomeTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value22750-98.51736-70.11512126-69.3-32.1171479.404-68.83685-48.95956201122-17.826-39.2666472.032-35.8748.917-0.5968.54820-31.344328.03743-9.276516.1564.487-0.274-1.85110-2.2860.723-1.842-4.0872.483
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements us-gaap:AwardType

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:EmployeeStockOption


Incremental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value4.84.5-0.37.87.85.0-0.14.85.46.5
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStock


Incremental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value1.00.60.00.60.50.30.00.1
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements20.813.3-0.07.76.46.00.01.5

us-gaap:InventoryWriteDown

us-gaap:InventoryWriteDown


Inventory
Period End2021-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value1396.45.42.76.42.75.02.04.30.71.86.41.72.51.60.81.14.3-0.11.73.28.40.26.51.9
Percentage of InventoryWriteDown100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LossContingencyAccrualCarryingValuePeriodIncreaseDecrease us-gaap:LitigationCase

us-gaap:LossContingencyAccrualCarryingValuePeriodIncreaseDecrease

regn:Amgenv.s.Regeneron


Loss
Period End2020-12-31
Value-95000000.0
Percentage of LossContingencyAccrualCarryingValuePeriodIncreaseDecrease100.0

us-gaap:MarketableSecuritiesRealizedGainLoss

us-gaap:MarketableSecuritiesRealizedGainLoss


Marketable
Period End2020-09-302020-06-302020-03-312019-06-302019-03-312018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-31
Value0.2280.00.00.00.00.00.00.00.00.00.00.0
Percentage of MarketableSecuritiesRealizedGainLoss100.0100.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-0.8-13.3-1.8-4.944-28.84.41.01416-0.0460.7523.374-11.08-23.93218.2046.956-9.941-8.1030.84-4.2080.851-11.432-28.751-4.34725222.7982.6531.6630.578-1.785-0.4780.7380.467-1.0340.525-0.131-0.8271.2710.316-2.3160.131-1.023-0.327
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoncashIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-308.311523-64.5258-82.6142-2.5-134.523-94.79427504.193-19.565-6.385-33.675-3.956-31.553-5.791-3.838-3.957-0.504-15.57-11.621-6.006-17.159-6.246-2.837-3.761-7.982.613-11.149-7.174-12.756-7.92-7.51-5.863-8.245-1.289-0.25-0.582
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingIncome us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

us-gaap:OtherOperatingIncome

regn:AmountsRecognizedInConnectionWithUpFrontPayments, regn:SanofiCollaborationAgreementImmunooncology


Other
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value202016182926
Percentage of OtherOperatingIncome100.0100.0100.0100.0100.0100.0

regn:AmountsRecognizedInConnectionWithUpFrontPayments, regn:TevaPharmaceuticalsCollaborationAgreement


Other
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value172016222421
Percentage of OtherOperatingIncome86.0101.0100.6123.284.581.7

us-gaap:OtherOperatingIncome us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject, us-gaap:IncomeStatementLocation

regn:AmountsRecognizedInConnectionWithUpFrontPayments, regn:TevaPharmaceuticalsCollaborationAgreement, us-gaap:OtherOperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value7.2122016
Percentage of OtherOperatingIncome0.00.0101.0100.6

us-gaap:OtherOperatingIncomeExpenseNet

us-gaap:OtherOperatingIncomeExpenseNet


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value314014544504038506356
Percentage of OtherOperatingIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value2615428804161551470.0291011045310.022346310.0961.941431.04288351421911101.904632893703.085911012498.762113.6461.063
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireMarketableSecurities

us-gaap:PaymentsToAcquireMarketableSecurities


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value52613605981109819714367645114810403113525796013934062682082033772280.06.9632092459585103120253991941011807212722248124990.0153631944177
Percentage of PaymentsToAcquireMarketableSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromIssuanceOfCommonStock


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value213951043031356811488.41414027532013133817216362624395534397645178.01555157.4182112158.8097.80331-5.480.23710131831.6962.8389.226
Percentage of ProceedsFromIssuanceOfCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleAndMaturityOfMarketableSecurities

us-gaap:ProceedsFromSaleAndMaturityOfMarketableSecurities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value8004164544862402441297560407338131181206255165107153119828941606172113802596073825811252541788896751011071585848917263
Percentage of ProceedsFromSaleAndMaturityOfMarketableSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfShortTermDebt

us-gaap:RepaymentsOfShortTermDebt


Repayments
Period End2020-12-31
Value0.0
Percentage of RepaymentsOfShortTermDebt0.0

us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation us-gaap:StatementClassOfStock

us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation

us-gaap:CommonStock


Shares
Period End2020-09-302020-06-302020-03-312019-06-302018-06-30
Value200000.0600000.0400000.0100000.0200000.0
Percentage of SharesPaidForTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0

us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:CommonStock


Shares
Period End2021-06-302021-03-312020-06-302020-03-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value100000.0100000.0600000.0400000.0321000.07000.0198000.047000.0307000.0273000.017000.0239000.071000.099000.0469000.0162000.0183000.0
Percentage of SharesPaidForTaxWithholdingForShareBasedCompensation0.00.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation us-gaap:StatementClassOfStock

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:CommonStock


Stock
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value900000.04400000.03100000.0100000.0300000.0600000.0
Percentage of StockIssuedDuringPeriodSharesShareBasedCompensation100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-06-302020-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value700000.0500000.04400000.03100000.00092000.0000111000.0
Percentage of StockIssuedDuringPeriodSharesShareBasedCompensation0.00.0100.0100.00.00.00.00.00.00.00.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2169329713558178.3131400.00.03.4050.00.00.02.867
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.00.00.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2169329713558178.3131400.00.03.4050.00.00.02.867
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.00.00.0100.0

us-gaap:StockRepurchasedDuringPeriodShares us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedDuringPeriodShares

us-gaap:TreasuryStock


Stock
Period End2021-06-302021-03-312020-06-302020-03-31
Value0.60.79.90.8
Percentage of StockRepurchasedDuringPeriodShares100.0100.0100.0100.0

us-gaap:StockRepurchasedDuringPeriodValue

us-gaap:StockRepurchasedDuringPeriodValue


Stock
Period End2021-06-302021-03-312020-06-302020-03-31
Value2883235071336
Percentage of StockRepurchasedDuringPeriodValue100.0100.0100.0100.0

us-gaap:StockRepurchasedDuringPeriodValue us-gaap:StatementEquityComponents

us-gaap:TreasuryStock


Stock
Period End2021-06-302021-03-312020-06-302020-03-31
Value2883235071336
Percentage of StockRepurchasedDuringPeriodValue100.0100.0100.0100.0

us-gaap:TreasuryStockSharesAcquired

us-gaap:TreasuryStockSharesAcquired


Treasury
Period End2021-06-302020-05-31
Value600000.09806800.0
Percentage of TreasuryStockSharesAcquired100.0100.0

us-gaap:TreasuryStockSharesAcquired us-gaap:StatementEquityComponents

us-gaap:TreasuryStock


Treasury
Period End2020-09-302020-06-302020-03-312019-09-302019-03-312018-09-302018-06-302014-12-312014-09-30
Value100000.09900000.0800000.0200000.0100000.0100000.0100000.01496000.00
Percentage of TreasuryStockSharesAcquired0.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStockValueAcquiredCostMethod

us-gaap:TreasuryStockValueAcquiredCostMethod


Treasury
Period End2021-06-302020-09-302020-05-312020-06-302020-03-312019-09-302019-03-312018-09-302018-06-302014-12-312014-09-30
Value28810050005071336485442370.00.0
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:TreasuryStockValueAcquiredCostMethod dei:LegalEntity, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:Sanofi, regn:DupilumabREGN3500EligibleInvestments


Treasury
Period End2021-03-312020-06-30
Value4151
Percentage of TreasuryStockValueAcquiredCostMethod0.01.0

regn:Sanofi, regn:LibtayoDevelopment


Treasury
Period End2021-03-312020-06-30
Value2120
Percentage of TreasuryStockValueAcquiredCostMethod0.00.4

us-gaap:TreasuryStockValueAcquiredCostMethod us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:DupilumabREGN3500EligibleInvestments


Treasury
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.00.051410.0190.010.0
Percentage of TreasuryStockValueAcquiredCostMethod0.00.01.012.40.039.80.018.5

regn:LibtayoDevelopment


Treasury
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.00.020210.0290.044
Percentage of TreasuryStockValueAcquiredCostMethod0.00.00.46.40.060.00.081.5

us-gaap:TreasuryStockValueAcquiredCostMethod us-gaap:ShareRepurchaseProgram

regn:ShareRepurchaseProgram


Treasury
Period End2020-09-302020-06-302020-03-31
Value1000.0272
Percentage of TreasuryStockValueAcquiredCostMethod100.00.081.2

regn:ShareRepurchaseProgram2021


Treasury
Period End2021-03-31
Value323
Percentage of TreasuryStockValueAcquiredCostMethod0.0

us-gaap:TreasuryStockValueAcquiredCostMethod us-gaap:StatementEquityComponents

us-gaap:TreasuryStock


Treasury
Period End2020-09-302020-06-302020-03-312019-09-302019-03-312018-09-302018-06-302014-12-312014-09-30
Value1005071336485442371250.001
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.0100.0100.0100.0100.0100.00.00.0

dei:EntityCommonStockSharesOutstanding us-gaap:StatementClassOfStock

dei:EntityCommonStockSharesOutstanding

us-gaap:CommonClassA


Entity
Period End2020-07-232020-04-142020-01-312019-10-242019-07-222019-04-172019-01-312018-10-192018-07-202018-04-122018-02-012017-10-202017-07-202017-04-132017-02-012016-10-202016-07-142016-04-142016-02-042015-10-162015-07-172015-04-162015-02-052014-10-162014-07-172014-04-172014-02-062013-10-282013-07-172013-04-172013-02-072012-10-122012-07-132012-04-112012-02-102011-10-19
Value1.848971.848971.848971.848971.848971.9113541.9113541.9113541.9113541.9113541.9113541.9114561.9114561.9114561.9114561.9114561.9114561.9131361.9137761.9137761.9518681.9718681.9718681.9733681.9790552.0007812.0204812.0288712.038922.0580572.0690842.0895122.0895122.0895122.1095122.109512
Percentage of EntityCommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStock


Entity
Period End2020-07-232020-04-142020-01-312019-10-242019-07-222019-04-172019-01-312018-10-192018-07-202018-04-122018-02-012017-10-202017-07-202017-04-132017-02-012016-10-202016-07-142016-04-142016-02-042015-10-162015-07-172015-04-162015-02-052014-10-162014-07-172014-04-172014-02-062013-10-282013-07-172013-04-172013-02-072012-10-12
Value104110108107107107107106106105105105105104104103103103102102101101100999998979796959594
Percentage of EntityCommonStockSharesOutstanding5654.15985.75850.35838.25840.25636.25617.35562.75553.45543.25534.65520.85505.85460.75449.75417.85408.65392.55375.55337.75212.35137.55104.05051.95006.84942.14845.84800.24743.24660.14609.84521.2

regn:AccruedClinicalTrialExpenseCurrent

regn:AccruedClinicalTrialExpenseCurrent


Accrued
Period End2020-12-312019-12-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value2831421421201191019291828882886248444145353023242018101114119.85109.8029.727
Percentage of AccruedClinicalTrialExpenseCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

regn:AccruedSalesRelatedChargesDeductionsAndRoyalties

regn:AccruedSalesRelatedChargesDeductionsAndRoyalties


Accrued
Period End2020-12-312019-12-31
Value423249
Percentage of AccruedSalesRelatedChargesDeductionsAndRoyalties100.0100.0

regn:ContingentReimbursementObligation us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:ContingentReimbursementObligation

regn:BayerCollaborationAgreement


Contingent
Period End2020-12-31
Value276
Percentage of ContingentReimbursementObligation100.0

regn:SanofiCollaborationAgreementAntibody


Contingent
Period End2020-12-31
Value3103
Percentage of ContingentReimbursementObligation1124.3

regn:SanofiCollaborationAgreementImmunooncology


Contingent
Period End2020-12-31
Value107
Percentage of ContingentReimbursementObligation38.8

regn:LesseeFinanceLeaseLiabilityDebtFinancingCosts

regn:LesseeFinanceLeaseLiabilityDebtFinancingCosts


Lessee
Period End2020-12-31
Value2900000.0
Percentage of LesseeFinanceLeaseLiabilityDebtFinancingCosts100.0

regn:MaximumPercentageOfOutstandingSharesThatMayBeAcquiredUnderStandstillProvisions us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:MaximumPercentageOfOutstandingSharesThatMayBeAcquiredUnderStandstillProvisions

regn:BayerCollaborationAgreement


Maximum
Period End2020-12-312019-12-312018-12-31
Value20.00.20.2
Percentage of MaximumPercentageOfOutstandingSharesThatMayBeAcquiredUnderStandstillProvisions100.0100.0100.0

regn:SanofiCollaborationAgreement


Maximum
Period End2020-12-312019-12-312018-12-31
Value30.00.30.3
Percentage of MaximumPercentageOfOutstandingSharesThatMayBeAcquiredUnderStandstillProvisions150.0150.0150.0

regn:TevaPharmaceuticalsCollaborationAgreement


Maximum
Period End2020-12-312019-12-312018-12-31
Value5.00.050.05
Percentage of MaximumPercentageOfOutstandingSharesThatMayBeAcquiredUnderStandstillProvisions25.025.025.0

regn:PercentageOfOutstandingSharesOrVotingRightsUnderAmendedInvestorAgreement us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:PercentageOfOutstandingSharesOrVotingRightsUnderAmendedInvestorAgreement

regn:SanofiCollaborationAgreement


Percentage
Period End2020-12-31
Value20.0
Percentage of PercentageOfOutstandingSharesOrVotingRightsUnderAmendedInvestorAgreement100.0

regn:UnsatisfiedObligation us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:UnsatisfiedObligation

regn:SanofiCollaborationAgreementImmunooncology


Unsatisfied
Period End2020-09-302020-06-302020-03-31
Value95110201087
Percentage of UnsatisfiedObligation100.0100.0100.0

regn:TevaPharmaceuticalsCollaborationAgreement


Unsatisfied
Period End2020-09-302020-06-302020-03-31
Value130173225
Percentage of UnsatisfiedObligation13.717.020.7

us-gaap:AccountsAndNotesReceivableNet

us-gaap:AccountsAndNotesReceivableNet


Accounts
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value48643140131128628328929326726124324222120319517518718124016215112516315614211212763
Percentage of AccountsAndNotesReceivableNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsAndNotesReceivableNet us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:BayerCollaborationAgreement


Accounts
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value336299245279311
Percentage of AccountsAndNotesReceivableNet0.061.557.069.7100.0

regn:OtherCollaborationAgreements


Accounts
Period End2020-12-312019-12-31
Value598425
Percentage of AccountsAndNotesReceivableNet0.0136.4

regn:SanofiCollaborationAgreement


Accounts
Period End2020-12-312019-12-31
Value404260
Percentage of AccountsAndNotesReceivableNet0.083.6

regn:SanofiCollaborationAgreementAntibody


Accounts
Period End2020-12-312019-12-31
Value407272
Percentage of AccountsAndNotesReceivableNet0.087.5

regn:SanofiCollaborationAgreementImmunooncology


Accounts
Period End2020-12-312019-12-31
Value6.516
Percentage of AccountsAndNotesReceivableNet0.05.4

regn:TevaPharmaceuticalsCollaborationAgreement


Accounts
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value2726282221
Percentage of AccountsAndNotesReceivableNet0.05.56.65.66.8

us-gaap:AccountsPayableCurrentAndNoncurrent

us-gaap:AccountsPayableCurrentAndNoncurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value476542475443380347418335244239218172171207178
Percentage of AccountsPayableCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableRelatedPartiesCurrent

us-gaap:AccountsReceivableRelatedPartiesCurrent


Accounts
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value46038946826034525228722626924316819321722121492124138173153199197159121110116118104
Percentage of AccountsReceivableRelatedPartiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableRelatedPartiesCurrent us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:SanofiCollaborationAgreementAntibody


Accounts
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value453383458272332248264138187160121
Percentage of AccountsReceivableRelatedPartiesCurrent98.498.497.9104.696.398.791.961.069.766.262.5

regn:SanofiCollaborationAgreementImmunooncology


Accounts
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value4.52.2-2.4-16.78.21877757659
Percentage of AccountsReceivableRelatedPartiesCurrent1.00.6-0.5-6.42.46.534.428.131.530.6

us-gaap:AccruedLiabilitiesAndOtherLiabilities

us-gaap:AccruedLiabilitiesAndOtherLiabilities


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2018149215211303125711431086821876741772781670666637
Percentage of AccruedLiabilitiesAndOtherLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:AssetsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2020-12-312019-12-312018-12-31
Value83961843
Percentage of AssetsFairValueDisclosure100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2020-12-312019-12-312018-12-31
Value368942343053
Percentage of AssetsFairValueDisclosure439.3684.37003.7

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2020-12-312019-12-312018-12-31
Value452848533097
Percentage of AssetsFairValueDisclosure539.3784.37103.7

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value2529404244232827239.71.02.3422.3122.21
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax regn:ClassificationOfInvestment, us-gaap:FinancialInstrument

regn:Unrestricted, us-gaap:CertificatesOfDeposit


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0.10.10.10.10.10.10.10.00.00.00.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.20.20.40.40.40.41.00.00.00.00.0

regn:Unrestricted, us-gaap:CommercialPaper


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0.20.60.10.00.00.10.00.00.0010.00.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.51.30.40.00.00.40.00.00.00.00.0

regn:Unrestricted, us-gaap:CorporateBondSecurities


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value4041202727229.31.02.3162.2822.176
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax93.593.388.197.597.196.195.9100.098.998.798.5

regn:Unrestricted, us-gaap:SovereignDebtSecurities


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1.21.21.20.40.50.50.20.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax2.82.75.11.41.82.22.10.0

regn:Unrestricted, us-gaap:USTreasuryAndGovernment


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1.31.11.40.20.20.20.10.00.0250.030.034
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax3.02.46.00.70.70.91.00.01.11.31.5

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax us-gaap:FinancialInstrument

us-gaap:CertificatesOfDeposit


Available
Period End2021-06-302021-03-312020-12-312019-12-312018-12-31
Value0.10.10.10.10.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.40.30.20.40.0

us-gaap:CommercialPaper


Available
Period End2021-03-312020-12-312019-12-312018-12-31
Value0.10.10.00.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.30.20.00.0

us-gaap:CorporateBondSecurities


Available
Period End2021-06-302021-03-312020-12-312019-12-312018-12-31
Value242737271.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax94.294.593.597.5100.0

us-gaap:SovereignDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312019-12-312018-12-31
Value0.70.81.10.40.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax2.72.72.71.40.0

us-gaap:USTreasuryAndGovernment


Available
Period End2021-06-302021-03-312020-12-312019-12-312018-12-31
Value0.70.61.30.20.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax2.72.03.20.70.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value3.76.20.20.80.7310.30.71.96.91819208.926
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax regn:ClassificationOfInvestment, us-gaap:FinancialInstrument

regn:Unrestricted, us-gaap:CorporateBondSecurities


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0.70.7310.20.61.76.31718187.672
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax87.5100.099.166.785.789.591.394.692.292.286.0

regn:Unrestricted, us-gaap:USTreasuryAndGovernment


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0.10.00.00.10.10.20.61.01.5231.5891.241
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax12.50.00.033.314.310.58.75.47.77.713.9

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax us-gaap:FinancialInstrument

us-gaap:CorporateBondSecurities


Available
Period End2021-06-302021-03-312020-12-312019-12-312018-12-31
Value3.55.90.20.217
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax94.695.2100.066.794.6

us-gaap:SovereignDebtSecurities


Available
Period End2021-06-302021-03-312019-12-312018-12-31
Value0.10.10.00.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax2.71.60.00.0

us-gaap:USTreasuryAndGovernment


Available
Period End2021-06-302021-03-312019-12-312018-12-31
Value0.10.20.11.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax2.73.233.35.4

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value43154584364935082890447842064148407337303026285127432027
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis regn:ClassificationOfInvestment, us-gaap:FinancialInstrument

regn:Unrestricted, us-gaap:CertificatesOfDeposit


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value122105777266536960654011
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis3.53.61.71.71.61.31.92.02.31.50.5

regn:Unrestricted, us-gaap:CommercialPaper


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value390283162921089915211310976106
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis11.19.83.62.22.62.44.13.83.82.85.3

regn:Unrestricted, us-gaap:CorporateBondSecurities


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value27962393412839603880377433522734256224971717
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis79.782.892.294.293.592.689.990.489.891.084.7

regn:Unrestricted, us-gaap:SovereignDebtSecurities


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value652736262626267.6
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis1.90.90.80.60.60.70.70.3

regn:Unrestricted, us-gaap:USTreasuryAndGovernment


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value13381735465119129110112126186
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis3.82.81.61.31.62.93.53.63.94.69.2

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis us-gaap:FinancialInstrument

us-gaap:CertificatesOfDeposit


Available
Period End2021-06-302021-03-312020-12-312019-12-312018-12-31
Value1711671277260
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis4.03.63.51.72.0

us-gaap:CommercialPaper


Available
Period End2021-06-302021-03-312020-12-312019-12-312018-12-31
Value21525427692113
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis5.05.57.62.23.8

us-gaap:CorporateBondSecurities


Available
Period End2021-06-302021-03-312020-12-312019-12-312018-12-31
Value36853610305339602734
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis85.478.883.794.290.4

us-gaap:SovereignDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312019-12-312018-12-31
Value646565267.6
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis1.51.41.80.60.3

us-gaap:USTreasuryAndGovernment


Available
Period End2021-06-302021-03-312020-12-312019-12-312018-12-31
Value17748712754110
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis4.110.63.51.33.6

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value24992541229520971779267426382682247022091667172919591752142612391004898815759572533600653542392360496538525383
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value183820651393145211521795159614931624152313421104765605593586523495503443345244236241213234251287216186158
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities

us-gaap:AvailableForSaleSecuritiesDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value43374607368935502934446942344176409437333009283427242358202018261527140813181203917778836894757627613789760717547509326479351461422296322301310510
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities regn:ClassificationOfInvestment, us-gaap:FinancialInstrument

regn:Unrestricted, us-gaap:CertificatesOfDeposit


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value122105777266536960654011
Percentage of AvailableForSaleSecuritiesDebtSecurities3.53.61.71.71.61.31.92.02.31.50.5

regn:Unrestricted, us-gaap:CommercialPaper


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value390283162921089915211310976106
Percentage of AvailableForSaleSecuritiesDebtSecurities11.09.73.62.22.62.44.13.83.92.85.3

regn:Unrestricted, us-gaap:CorporateBondSecurities


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value28362434411739883907379433552718254624801712
Percentage of AvailableForSaleSecuritiesDebtSecurities79.983.092.194.293.692.789.990.389.891.084.8

regn:Unrestricted, us-gaap:SovereignDebtSecurities


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value662837272727277.6
Percentage of AvailableForSaleSecuritiesDebtSecurities1.91.00.80.60.70.70.70.3

regn:Unrestricted, us-gaap:USTreasuryAndGovernment


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value13482755466119129109110124185
Percentage of AvailableForSaleSecuritiesDebtSecurities3.82.81.71.31.62.93.53.63.94.69.2

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CertificatesOfDeposit


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value17116712712210577726653696011
Percentage of AvailableForSaleSecuritiesDebtSecurities4.03.63.53.53.61.71.71.61.31.92.00.5

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CommercialPaper


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value2152542763902831629210899152113107
Percentage of AvailableForSaleSecuritiesDebtSecurities5.05.57.511.09.73.62.22.62.44.13.85.3

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CorporateBondSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value370636323090283624344117398839073794335527181712
Percentage of AvailableForSaleSecuritiesDebtSecurities85.578.883.879.983.092.194.293.692.789.990.384.8

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:SovereignDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value656566662837272727277.6
Percentage of AvailableForSaleSecuritiesDebtSecurities1.51.41.81.91.00.80.60.70.70.70.3

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:USTreasuryAndGovernment


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value17848712813482755466119129109185
Percentage of AvailableForSaleSecuritiesDebtSecurities4.110.63.53.82.81.71.31.62.93.53.69.2

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring, us-gaap:CertificatesOfDeposit


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value16712712210577726653696011
Percentage of AvailableForSaleSecuritiesDebtSecurities3.63.53.53.61.71.71.61.31.92.00.5

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring, us-gaap:CommercialPaper


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value2542763902831629210899152113107
Percentage of AvailableForSaleSecuritiesDebtSecurities5.57.511.09.73.62.22.62.44.13.85.3

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring, us-gaap:CorporateBondSecurities


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value36323090283624344117398839073794335527181712
Percentage of AvailableForSaleSecuritiesDebtSecurities78.883.879.983.092.194.293.692.789.990.384.8

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring, us-gaap:SovereignDebtSecurities


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value6566662837272727277.6
Percentage of AvailableForSaleSecuritiesDebtSecurities1.41.81.91.00.80.60.70.70.70.3

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring, us-gaap:USTreasuryAndGovernment


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value48712813482755466119129109185
Percentage of AvailableForSaleSecuritiesDebtSecurities10.63.53.82.81.71.31.62.93.53.69.2

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:FairValueMeasurementsRecurring, us-gaap:CertificatesOfDeposit


Available
Period End2021-06-302020-12-31
Value171127
Percentage of AvailableForSaleSecuritiesDebtSecurities4.03.5

us-gaap:FairValueMeasurementsRecurring, us-gaap:CommercialPaper


Available
Period End2021-06-302020-12-31
Value215276
Percentage of AvailableForSaleSecuritiesDebtSecurities5.07.5

us-gaap:FairValueMeasurementsRecurring, us-gaap:CorporateBondSecurities


Available
Period End2021-06-302020-12-31
Value37063090
Percentage of AvailableForSaleSecuritiesDebtSecurities85.583.8

us-gaap:FairValueMeasurementsRecurring, us-gaap:SovereignDebtSecurities


Available
Period End2021-06-302020-12-31
Value6566
Percentage of AvailableForSaleSecuritiesDebtSecurities1.51.8

us-gaap:FairValueMeasurementsRecurring, us-gaap:USTreasuryAndGovernment


Available
Period End2021-06-302020-12-31
Value178128
Percentage of AvailableForSaleSecuritiesDebtSecurities4.13.5

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FinancialInstrument

us-gaap:CertificatesOfDeposit


Available
Period End2021-06-302021-03-312020-12-312019-12-312018-12-31
Value1711671277260
Percentage of AvailableForSaleSecuritiesDebtSecurities4.03.63.51.72.0

us-gaap:CommercialPaper


Available
Period End2021-06-302021-03-312020-12-312019-12-312018-12-31
Value21525427692113
Percentage of AvailableForSaleSecuritiesDebtSecurities5.05.57.52.23.8

us-gaap:CorporateBondSecurities


Available
Period End2021-06-302021-03-312020-12-312019-12-312018-12-31
Value37063632309039882718
Percentage of AvailableForSaleSecuritiesDebtSecurities85.578.883.894.290.3

us-gaap:SovereignDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312019-12-312018-12-31
Value656566277.6
Percentage of AvailableForSaleSecuritiesDebtSecurities1.51.41.80.60.3

us-gaap:USTreasuryAndGovernment


Available
Period End2021-06-302021-03-312020-12-312019-12-312018-12-31
Value17848712854109
Percentage of AvailableForSaleSecuritiesDebtSecurities4.110.63.51.33.6

us-gaap:ContractWithCustomerLiability us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

us-gaap:ContractWithCustomerLiability

regn:BayerCollaborationAgreement


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value989799122125124123
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0

regn:SanofiCollaborationAgreementAntibody


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value459383347433405401337377339302236199170117
Percentage of ContractWithCustomerLiability464.6395.3348.7355.1323.6323.2274.10.00.00.00.00.00.00.0

regn:SanofiCollaborationAgreementImmunooncology


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value117.110131212568602629665289468476440
Percentage of ContractWithCustomerLiability11.57.310.711.110.010.3461.80.00.00.00.00.00.00.0

us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:ContractWithCustomerLiabilityNoncurrent


Contract
Period End2021-06-302021-03-312020-12-312019-12-312018-12-312017-12-31
Value502757619464629
Percentage of ContractWithCustomerLiabilityNoncurrent100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityNoncurrent us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

regn:OtherCollaborationAgreements


Contract
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value4167676577131181178184197199249
Percentage of ContractWithCustomerLiabilityNoncurrent71.10.00.00.012.50.00.00.039.80.00.039.6

regn:SanofiCollaborationAgreement


Contract
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value16373716509551544633279421339379
Percentage of ContractWithCustomerLiabilityNoncurrent28.90.00.00.082.30.00.00.060.20.00.060.4

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months


Debt
Period End2021-06-302021-03-312020-09-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1311145560620392743133125171482142516361044
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months us-gaap:FinancialInstrument

us-gaap:CorporateBondSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value116713043645602471990257294312313148214171588930
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months89.089.60.092.50.097.693.794.1100.060.6100.099.597.189.2

us-gaap:SovereignDebtSecurities


Debt
Period End2021-06-302021-03-31
Value3328
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months2.51.9

us-gaap:USTreasuryAndGovernment


Debt
Period End2021-06-302021-03-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1111234517180.02040.07.82645110
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months8.58.57.56.35.90.039.40.00.52.810.6

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss


Debt
Period End2021-06-302021-03-312020-09-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value3.76.20.8310.30.40.20.36.111155.343
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss us-gaap:FinancialInstrument

us-gaap:CorporateBondSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value3.55.90.20.70.7310.20.30.20.36.110154.924
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss94.695.20.087.50.099.166.775.0100.0100.0100.098.295.892.2

us-gaap:USTreasuryAndGovernment


Debt
Period End2021-06-302021-03-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0.10.20.10.10.10.00.00.00.2020.6560.409
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss2.73.212.533.325.00.00.00.01.84.27.7

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition


Debt
Period End2021-06-302021-03-312020-09-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value13111455606203931754995315502383192819261370
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition us-gaap:FinancialInstrument

us-gaap:CorporateBondSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value11671304364560247199029851187712542284182418061187
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition89.089.60.092.50.097.693.993.192.080.995.894.693.886.6

us-gaap:SovereignDebtSecurities


Debt
Period End2021-06-302021-03-31
Value3328
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition2.51.9

us-gaap:USTreasuryAndGovernment


Debt
Period End2021-06-302021-03-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1111234519387629699103117178
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition8.58.57.56.16.98.019.14.25.46.113.0

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss


Debt
Period End2021-06-302021-03-312020-09-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value3.76.20.8310.30.71.96.91819208.926
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss us-gaap:FinancialInstrument

us-gaap:CorporateBondSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value3.55.90.20.70.7310.20.61.76.31718187.672
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss94.695.20.087.50.099.166.785.789.591.394.692.292.286.0

us-gaap:USTreasuryAndGovernment


Debt
Period End2021-06-302021-03-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0.10.20.10.10.10.20.61.01.5231.5891.241
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss2.73.212.533.314.310.58.75.47.77.713.9

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxAssetsNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value746765858804774771824808821829828562545506
Percentage of DeferredIncomeTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsDeferredIncome

us-gaap:DeferredTaxAssetsDeferredIncome


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value4422201022145175889912070
Percentage of DeferredTaxAssetsDeferredIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value761809672558837483348279350579462
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsPropertyPlantAndEquipment

us-gaap:DeferredTaxAssetsPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1401921070.0210.08.078181.3814
Percentage of DeferredTaxAssetsPropertyPlantAndEquipment100.0100.0100.00.0100.00.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value4365194583915153491941095347
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value139755338374719
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value42112.73.0679.275123.5780.0
Percentage of DeferredTaxLiabilitiesOther100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent


Employee
Period End2020-12-312019-12-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value4653442611911661469415313911492133120836492755141696839321946353442372612
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

regn:NonPerformanceBasedStockOptions


Employee
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value491521702816888962706492286
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PerformanceShares


Employee
Period End2020-12-31
Value260
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized52.9

us-gaap:RestrictedStock


Employee
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value425274124342633344356
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized86.652.617.74.32.93.54.98.919.6

us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueAmount

us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueAmount


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value40405960705555434545
Percentage of EquitySecuritiesWithoutReadilyDeterminableFairValueAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiability


Finance
Period End2020-12-31
Value717
Percentage of FinanceLeaseLiability100.0

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityCurrent


Finance
Period End2021-06-302021-03-31
Value718717
Percentage of FinanceLeaseLiabilityCurrent100.0100.0

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityNoncurrent


Finance
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value717716715715713712711
Percentage of FinanceLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDue


Finance
Period End2020-12-31
Value735
Percentage of FinanceLeaseLiabilityPaymentsDue100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths


Finance
Period End2020-12-31
Value12
Percentage of FinanceLeaseLiabilityPaymentsDueNextTwelveMonths100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo


Finance
Period End2020-12-31
Value723
Percentage of FinanceLeaseLiabilityPaymentsDueYearTwo100.0

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount


Finance
Period End2020-12-31
Value15
Percentage of FinanceLeaseLiabilityUndiscountedExcessAmount100.0

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseRightOfUseAsset


Finance
Period End2020-12-312019-12-31
Value645660
Percentage of FinanceLeaseRightOfUseAsset100.0100.0

us-gaap:FinanceLeaseRightOfUseAssetAccumulatedAmortization

us-gaap:FinanceLeaseRightOfUseAssetAccumulatedAmortization


Finance
Period End2020-12-312019-12-31
Value9076
Percentage of FinanceLeaseRightOfUseAssetAccumulatedAmortization100.0100.0

us-gaap:InventoryFinishedGoodsNetOfReserves

us-gaap:InventoryFinishedGoodsNetOfReserves


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value106117121132132967049343024282622212333201316141411129.49511101112131412106.392.571.142
Percentage of InventoryFinishedGoodsNetOfReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryRawMaterialsNetOfReserves

us-gaap:InventoryRawMaterialsNetOfReserves


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value601576459400306210216229229232226216205201190187170127928973855934209.6441010106.7929.125.2255.386.3154.8624.666
Percentage of InventoryRawMaterialsNetOfReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryWorkInProcessNetOfReserves

us-gaap:InventoryWorkInProcessNetOfReserves


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value741971904715696692727633663581571435400374302217162173202164165157132110111837370604735343425148.846
Percentage of InventoryWorkInProcessNetOfReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeFinanceLeaseDiscountRate

us-gaap:LesseeFinanceLeaseDiscountRate


Lessee
Period End2020-12-312019-12-31
Value1.663.05
Percentage of LesseeFinanceLeaseDiscountRate100.0100.0

us-gaap:LongTermDebtFairValue

us-gaap:LongTermDebtFairValue


Long
Period End2021-06-302021-03-312020-12-312020-09-30
Value1868180319581929
Percentage of LongTermDebtFairValue100.0100.0100.0100.0

us-gaap:LossContingencyAccrualAtCarryingValue

us-gaap:LossContingencyAccrualAtCarryingValue


Loss
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value9.613213211710030
Percentage of LossContingencyAccrualAtCarryingValue100.0100.0100.0100.0100.0100.0

us-gaap:MarketableSecurities us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:MarketableSecurities

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Marketable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-03-312017-12-31
Value138310028397617895626189612912243906962
Percentage of MarketableSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Marketable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-03-312017-12-31
Value43554607368935662949446942344509437937403053288723582020
Percentage of MarketableSecurities314.9459.6439.3468.5373.5795.3684.34687.63389.83043.87003.73192.53414.23218.2

us-gaap:MarketableSecurities us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring


Marketable
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-03-312017-12-31
Value5609452843283739503148534605450838633097297724272083
Percentage of MarketableSecurities559.6539.3568.5473.5895.3784.34787.63489.83143.87103.73292.53514.23318.2

us-gaap:MarketableSecurities us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Marketable
Period End2021-06-302020-12-31
Value57384528
Percentage of MarketableSecurities414.9539.3

us-gaap:MarketableSecuritiesNoncurrent

us-gaap:MarketableSecuritiesNoncurrent


Marketable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3900354331352875258732363256311228842339175518732044182114861327106496786477758955563268158948346045355053438932917334627131228825427525825137337047
Percentage of MarketableSecuritiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherInventoryNetOfReserves

us-gaap:OtherInventoryNetOfReserves


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value53549943055350548140043239036432835829522121221318814591746145363229283327271811106.776.2116.551.96
Percentage of OtherInventoryNetOfReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherLiabilities us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

us-gaap:OtherLiabilities

regn:SanofiCollaborationAgreementImmunooncology


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value238258280441486527558
Percentage of OtherLiabilities100.0100.0100.0100.0100.0100.0100.0

regn:TevaPharmaceuticalsCollaborationAgreement


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value475466617797114
Percentage of OtherLiabilities19.821.123.813.816.018.620.5

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization


Property
Period End2020-12-312019-12-31
Value1131922
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization100.0100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization


Property
Period End2020-12-312019-12-31
Value32212890
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization100.0100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization us-gaap:StatementGeographical

country:US


Property
Period End2020-12-312019-12-31
Value23982118
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization74.473.3

srt:Europe


Property
Period End2020-12-312019-12-31
Value823772
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization25.626.7

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization


Property
Period End2020-12-312019-12-31
Value43523812
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization100.0100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization us-gaap:PropertyPlantAndEquipmentByType

regn:ComputerEquipmentAndSoftware


Property
Period End2020-12-312019-12-31
Value226183
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization5.24.8

regn:FurnitureOfficeEquipmentAndOther


Property
Period End2020-12-312019-12-31
Value130121
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization3.03.2

us-gaap:BuildingAndBuildingImprovements


Property
Period End2020-12-312019-12-31
Value18911683
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization43.444.2

us-gaap:ConstructionInProgress


Property
Period End2020-12-312019-12-31
Value724644
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization16.616.9

us-gaap:Equipment


Property
Period End2020-12-312019-12-31
Value1038850
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization23.922.3

us-gaap:Land


Property
Period End2020-12-312019-12-31
Value241230
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization5.56.1

us-gaap:LeaseholdImprovements


Property
Period End2020-12-312019-12-31
Value10097
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization2.32.6

us-gaap:RestrictedCash

us-gaap:RestrictedCash


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value12121313121212121212121212121212121212
Percentage of RestrictedCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueRemainingPerformanceObligation us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject

us-gaap:RevenueRemainingPerformanceObligation

regn:SanofiCollaborationAgreementImmunooncology


Revenue
Period End2021-06-302021-03-312020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value4745155571138119612511324139815621550
Percentage of RevenueRemainingPerformanceObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

regn:TevaPharmaceuticalsCollaborationAgreement


Revenue
Period End2021-06-302021-03-312020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value105123155267300357418472520525
Percentage of RevenueRemainingPerformanceObligation22.224.028.023.525.128.631.633.833.333.9

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:PerformanceShares


Share
Period End2020-12-312019-12-31
Value209.06198.1
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0

us-gaap:RestrictedStock


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value421.58368.16386.1404.72141.85133.96115.26112.1696.6825.33
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue201.7185.80.00.00.00.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2020-12-31
Value357.65
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:EmployeeStockOption


Share
Period End2020-12-312017-12-312016-12-312015-12-31
Value2347290433997209994
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue

us-gaap:EmployeeStockOption


Share
Period End2020-12-31
Value2294
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2020-12-31
Value377.23
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:EmployeeStockOption


Sharebased
Period End2020-12-31
Value1799
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1100.0

us-gaap:StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1 us-gaap:ShareRepurchaseProgram

us-gaap:StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1

regn:ShareRepurchaseProgram


Stock
Period End2020-09-30
Value372
Percentage of StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1100.0

regn:ShareRepurchaseProgram2021


Stock
Period End2021-06-302021-03-31
Value8871177
Percentage of StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount10.00.0

us-gaap:ValuationAllowancesAndReservesBalance

us-gaap:ValuationAllowancesAndReservesBalance


Valuation
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value32415613616512991979010985755556453740425545453824222525242423211821178.7672.218
Percentage of ValuationAllowancesAndReservesBalance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ValuationAllowancesAndReservesBalance us-gaap:ValuationAllowancesAndReservesType

regn:DistributionRelatedFees


Valuation
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value77464668464238374334342928292628334838393221182020192018171516115.5091.451
Percentage of ValuationAllowancesAndReservesBalance23.829.734.241.136.146.039.941.540.140.045.252.750.664.370.468.979.587.484.886.886.485.481.081.479.779.981.680.280.881.375.263.862.865.4

regn:OtherSalesRelatedDeductions


Valuation
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value44291310248.315161721152.8934.5623.6743.7421.0760.870.5170.5040.5040.5040.5320.5290.5220.5320.5380.5330.5320.5350.5451.8941.4960.4480.182
Percentage of ValuationAllowancesAndReservesBalance13.818.89.96.518.59.115.818.416.325.020.95.38.18.09.92.62.00.91.11.11.32.12.32.12.12.22.22.32.42.98.88.65.18.2

regn:RebatesAndChargebacks


Valuation
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value202807686584143364729252323127.426117.8476.4196.3625.4744.6573.0833.7924.144.6224.44.0334.0233.6762.9833.4214.782.810.585
Percentage of ValuationAllowancesAndReservesBalance62.451.455.852.445.445.044.440.143.635.033.942.041.327.719.728.518.511.614.112.012.212.416.616.518.217.916.317.516.815.815.927.632.126.4

Line plots across dimensions of each concept


us-gaap:SharesOutstanding
us-gaap:StatementEquityComponents
(None,)
Shares Outstandingus-gaap: Statement Equity Components
us-gaap:SharesOutstanding
us-gaap:StatementClassOfStock
(None,)
Shares Outstandingus-gaap: Statement Class Of Stock
TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
us-gaap:CostOfGoodsAndServicesSold
us-gaap:ProductOrService
(None,)
Cost Of Goods And Services Soldus-gaap: Product Or Service
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService, us-gaap:StatementGeographical
(None, 'country:US')
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service, us-gaap: Statement Geographical
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService, us-gaap:StatementGeographical, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
(None, 'us-gaap:NonUs', 'regn:BayerCollaborationAgreement')
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service, us-gaap: Statement Geographical, us-gaap: Capitalized Costs Of Unproved Properties Excluded From Amortization By Property Or Project
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
(None, 'regn:SanofiCollaborationAgreementAntibody')
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service, us-gaap: Capitalized Costs Of Unproved Properties Excluded From Amortization By Property Or Project
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
('us-gaap:ProductAndServiceOther', None)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service, us-gaap: Capitalized Costs Of Unproved Properties Excluded From Amortization By Property Or Project
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject, us-gaap:IncomeStatementLocation
(None, 'regn:SanofiCollaborationAgreementAntibody', 'regn:CollaborationRevenue')
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service, us-gaap: Capitalized Costs Of Unproved Properties Excluded From Amortization By Property Or Project, us-gaap: Income Statement Location
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject, us-gaap:IncomeStatementLocation
(None, 'regn:SanofiCollaborationAgreementAntibody', 'us-gaap:ResearchAndDevelopmentExpense')
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service, us-gaap: Capitalized Costs Of Unproved Properties Excluded From Amortization By Property Or Project, us-gaap: Income Statement Location
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject, us-gaap:IncomeStatementLocation
(None, 'regn:SanofiCollaborationAgreementImmunooncology', 'us-gaap:SellingGeneralAndAdministrativeExpenses')
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service, us-gaap: Capitalized Costs Of Unproved Properties Excluded From Amortization By Property Or Project, us-gaap: Income Statement Location
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService, us-gaap:StatementGeographical, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject, us-gaap:IncomeStatementLocation
(None, 'us-gaap:NonUs', 'regn:BayerCollaborationAgreement', 'regn:CollaborationRevenue')
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service, us-gaap: Statement Geographical, us-gaap: Capitalized Costs Of Unproved Properties Excluded From Amortization By Property Or Project, us-gaap: Income Statement Location
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService, us-gaap:StatementGeographical, us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject, us-gaap:IncomeStatementLocation
(None, 'us-gaap:NonUs', 'regn:BayerCollaborationAgreement', 'us-gaap:ResearchAndDevelopmentExpense')
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service, us-gaap: Statement Geographical, us-gaap: Capitalized Costs Of Unproved Properties Excluded From Amortization By Property Or Project, us-gaap: Income Statement Location
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:AccountsReceivableNetCurrent
us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
(None,)
Accounts Receivable Net Currentus-gaap: Capitalized Costs Of Unproved Properties Excluded From Amortization By Property Or Project
us-gaap:EquitySecuritiesFvNi
regn:ClassificationOfInvestment, us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency
(None, 'us-gaap:EstimateOfFairValueFairValueDisclosure', 'us-gaap:FairValueMeasurementsRecurring')
Equity Securities Fv Niregn: Classification Of Investment, us-gaap: Fair Value By Measurement Basis, us-gaap: Fair Value By Measurement Frequency
us-gaap:EquitySecuritiesFvNi
regn:ClassificationOfInvestment, us-gaap:FairValueByMeasurementFrequency
(None, 'us-gaap:FairValueMeasurementsRecurring')
Equity Securities Fv Niregn: Classification Of Investment, us-gaap: Fair Value By Measurement Frequency
us-gaap:ContractWithCustomerLiabilityCurrent
us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
(None,)
Contract With Customer Liability Currentus-gaap: Capitalized Costs Of Unproved Properties Excluded From Amortization By Property Or Project
us-gaap:LongTermDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
(None, 'us-gaap:SeniorNotes')
Long Term Debtus-gaap: Debt Instrument, us-gaap: Longterm Debt Type
us-gaap:OtherLiabilitiesNoncurrent
us-gaap:CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProject
(None,)
Other Liabilities Noncurrentus-gaap: Capitalized Costs Of Unproved Properties Excluded From Amortization By Property Or Project
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components