LH


Line plots across dimensions of each concept
Tables

Table of contents



us-gaap:CommonStockValue
us-gaap:StatementClassOfStock
us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:Revenues
us-gaap:StatementBusinessSegments

us-gaap:CostOfRevenue

us-gaap:CostOfGoodsAndServicesSold

us-gaap:GrossProfit

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:OperatingIncomeLoss
us-gaap:StatementBusinessSegments

us-gaap:InterestExpense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:NonoperatingIncomeExpense

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaidNet

us-gaap:ProfitLoss

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:Assets

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:AccountsReceivableNetCurrent

us-gaap:InventoryNet

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

us-gaap:Goodwill
us-gaap:StatementBusinessSegments

us-gaap:IntangibleAssetsNetExcludingGoodwill
lh:ScheduleOfOtherIntangibleAssetsByMajorClass

us-gaap:OtherAssetsNoncurrent

us-gaap:LiabilitiesCurrent

us-gaap:DebtCurrent

us-gaap:NotesPayableCurrent

us-gaap:AccountsPayableCurrent

us-gaap:LongTermDebtNoncurrent
us-gaap:LongtermDebtType

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ProfitLoss

us-gaap:DepreciationDepletionAndAmortization

us-gaap:IncreaseDecreaseInInventories

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:ShareBasedCompensation

us-gaap:UnrecognizedTaxBenefits

lh:AllowanceforCreditLossWriteOff
us-gaap:BalanceSheetLocation

lh:ConversionOfZeroCouponConvertibleDebt

lh:CurrentExpectedCreditLossesOpeningBalanceSheetImpactonRetainedEarnings
us-gaap:BalanceSheetLocation

lh:DefinedContributionPlanTotalExpense

lh:DepreciationAndAmortizationOfLeasedAssets

lh:IncomeLossFromContinuingOperationsBeforeIncomeTaxesAndMinorityInterest

lh:IncomeLossfromContinuingOperationsBeforeIncomeTaxesandNoncontrollingInterest

lh:IncreaseDecreaseinUnbilledContractReceivable

lh:Intercompanyrevenueelimination

lh:InterestPaidInCash

lh:Issuanceofcommonstockunderemployeeplans
us-gaap:StatementEquityComponents
us-gaap:RetirementPlanType
lh:NetDefinedBenefitPlanAmortizationAndDeferral

lh:NetProceedsFromIssuanceOfStockToEmployees

lh:NetRestructuringAndOtherSpecialCharges

lh:NetRestructuringCharges
us-gaap:StatementBusinessSegments

lh:OtherFinancingCashFlows

lh:PercentofRevenueContributed
us-gaap:ContractWithCustomerSalesChannel
us-gaap:ContractWithCustomerSalesChannel, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:StatementGeographical
us-gaap:StatementGeographical, us-gaap:ContractWithCustomerSalesChannel, us-gaap:StatementBusinessSegments
us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments

lh:RestructuringImpairment
us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments

lh:RestructuringReserveSettledWithCashAndOtherAdjustment
us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:AmortizationOfDeferredSalesCommissions

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AssetImpairmentCharges

us-gaap:BusinessExitCosts1

us-gaap:CapitalizedContractCostAmortization

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredRevenueRevenueRecognized1
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanInterestCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanServiceCost
us-gaap:BusinessAcquisition
us-gaap:DefinedContributionPlanCostRecognized

us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents
us-gaap:DerivativeInstrumentRisk
us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss
us-gaap:StatementBusinessSegments
us-gaap:GoodwillAndIntangibleAssetImpairment

us-gaap:GoodwillImpairmentLoss
us-gaap:StatementBusinessSegments

us-gaap:GoodwillTranslationAndPurchaseAccountingAdjustments
us-gaap:StatementBusinessSegments

us-gaap:ImpairmentOfInvestments
us-gaap:IncomeStatementLocation

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInDeferredRevenue

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InvestmentIncomeNet

us-gaap:OperatingLeaseImpairmentLoss
us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments

us-gaap:OtherComprehensiveIncomeLossBeforeTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax

us-gaap:OtherComprehensiveIncomeLossTax

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired
us-gaap:BusinessAcquisition

us-gaap:PaymentsToAcquireEquityMethodInvestments

us-gaap:ProceedsFromLongTermLinesOfCredit

us-gaap:ProceedsFromSaleOfEquityMethodInvestments

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RestructuringCharges
us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments

us-gaap:RestructuringReserveAccrualAdjustment1
us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments

us-gaap:SeveranceCosts1

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures
us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedDuringPeriodValue
us-gaap:StatementEquityComponents

lh:A2.30seniornotesdue2024

lh:A2.95seniornotesdue2029

lh:A4.625Seniornotesdue2020

lh:AllowanceforCreditLoss
us-gaap:Range, us-gaap:CreditFacility, us-gaap:SubsequentEventType
lh:DebttoEBITDALeverageRatioNextThreeQuarters
us-gaap:CreditFacility, us-gaap:SubsequentEventType
lh:DebttoEBITDALeverageRatioQuarterEnding1YearFromPresent

lh:DeferredIncomeTaxesAndOtherTaxLiabilities

lh:FairValueLiabilitiesMeasuredOnRecurringBasisDeferredCompensationLiability
us-gaap:FairValueByFairValueHierarchyLevel

lh:FairValueLiabilitiesMeasuredOnRecurringBasisNoncontrollingInterestPuts
us-gaap:FairValueByFairValueHierarchyLevel

lh:Longtermdebtissuancecosts

lh:NoncontrollingInterestMezzanineEquity

lh:NoteReceivableAllowanceforCreditLoss
us-gaap:StatementBusinessSegments
lh:PercentageFairValueofGoodwillExceededCarryingValue
us-gaap:CreditFacility, us-gaap:SubsequentEventType
lh:RevolvingCreditFacilityAccrueInterestPerAnnumBaseRatePlusPercentage
us-gaap:CreditFacility, us-gaap:SubsequentEventType
lh:RevolvingCreditFacilityAccrueInterestperAnnumatLiborPlusMarginPercentage
us-gaap:CreditFacility, us-gaap:SubsequentEventType
lh:RevolvingCreditFacilityFeePercentageRequiredtoPayonOutstandingCommitments

lh:SeniorNotesFairValue

lh:Shorttermdebtissuancecosts
us-gaap:CreditFacility, us-gaap:SubsequentEventType
lh:TermLoanAccrueInterestPerAnnumBaseRatePlusPercentage
us-gaap:CreditFacility, us-gaap:SubsequentEventType
lh:TermLoanAccrueInterestperAnnumatLiborPlusMarginPercentage

lh:UnbilledServicesAllowanceforCreditLoss
us-gaap:StatementBusinessSegments
lh:ValueofReportingUnitsGoodwillFairValueExceedsCarryingValue

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccruedSalesCommissionCurrentAndNoncurrent

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AmountOfDeferredCostsRelatedToLongTermContracts
us-gaap:BalanceSheetLocation, us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCapitalLeaseObligation
us-gaap:BalanceSheetLocation, us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
us-gaap:BusinessAcquisition
us-gaap:BalanceSheetLocation, us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther
us-gaap:BusinessAcquisition
us-gaap:BalanceSheetLocation, us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets
us-gaap:BusinessAcquisition
us-gaap:BalanceSheetLocation, us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable
us-gaap:BalanceSheetLocation, us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther
us-gaap:BusinessAcquisition
us-gaap:BalanceSheetLocation, us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets
us-gaap:BusinessAcquisition
us-gaap:BalanceSheetLocation, us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
us-gaap:BusinessAcquisition
us-gaap:BalanceSheetLocation, us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
us-gaap:BalanceSheetLocation, us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities
us-gaap:BusinessAcquisition
us-gaap:BalanceSheetLocation, us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
us-gaap:BusinessAcquisition
us-gaap:BalanceSheetLocation, us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
us-gaap:BusinessAcquisition

us-gaap:CapitalizedContractCostNet

us-gaap:CashSurrenderValueFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:ContingentConsiderationClassifiedAsEquityFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:ContractWithCustomerAssetGross

us-gaap:ContractWithCustomerLiability

us-gaap:DeferredIncomeTaxesAndOtherAssetsCurrent

us-gaap:DeferredRevenueCurrent

us-gaap:DefinedBenefitPlanFundedStatusOfPlan
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation
us-gaap:DerivativeInstrumentRisk
us-gaap:FairValueHedgeAssetsAtFairValue

us-gaap:FairValueHedgeLiabilitiesAtFairValue
us-gaap:DerivativeInstrumentRisk

us-gaap:FairValueHedgesAtFairValueNet

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
lh:ScheduleOfOtherIntangibleAssetsByMajorClass

us-gaap:ForeignCurrencyContractsLiabilityFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:IntangibleAssetsGrossExcludingGoodwill
lh:ScheduleOfOtherIntangibleAssetsByMajorClass
us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityFairValueOfAmountOutstanding

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:NotesPayable

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:PrepaidExpenseCurrent

us-gaap:RestructuringReserve
us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments
us-gaap:LongtermDebtType
us-gaap:SeniorLongTermNotes
us-gaap:DerivativeInstrumentRisk
us-gaap:ShorttermDebtFairValue

us-gaap:UnbilledContractsReceivable
us-gaap:StatementBusinessSegments

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued

Tables

  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
us-gaap:CommonStockValue ▁▁▁▁▆▆▆██████████████▃▃▃▃9999111111121212121212121212121212121210101010
 us-gaap:CommonStockSharesIssued us-gaap:StatementClassOfStock us-gaap:CommonStock▁▁▁▁█▇████████97979797123122124125125125125125125125NANANANANANANANANANANA
us-gaap:CommonStockSharesOutstanding ▆▆▆▆▆▆█████████████▇▇▁▁▁▁97979797989810110210210110210210210210210210210110110010084848484
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding 97NA989899NA102103103NA103103104NA104103103NA10210293NA868686
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic 97NA979898NA101101101NA102102102NA102102101NA10110091NA848485
us-gaap:EarningsPerShareBasic ▁▅▅▅▅▄▅▅▄█▄▅▅▄▄▅▄▄▄▄▃▄▄▄▄-3.272.342.261.941.881.583.142.291.76.911.771.841.871.791.741.941.581.131.511.670.011.411.621.671.33
us-gaap:EarningsPerShareDiluted ▁▅▅▅▅▄▅▅▄█▄▅▅▄▄▅▄▄▄▄▃▄▄▄▄-3.272.322.251.931.861.563.12.271.676.811.741.821.841.751.711.911.551.111.491.640.011.371.591.641.31
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
us-gaap:Revenues ▇███▇▇▇██▇▇▆▆▆▆▆▅▅▅▅▃▁▂▁▁2823295329282881279127872831286628482744265525422447242824142430236823002317226917931512155115161430
 us-gaap:Revenues us-gaap:StatementBusinessSegments lh:CovanceDrugDevelopment▇██▇▆▆▆▅▆▄▂▁1143120111751126107410991081105410781002867807NANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:StatementBusinessSegments lh:LabCorpDiagnostics▁▅▅▅▃▁▄█▅▄▄▃170217581759176017221694175218141770174217541721NANANANANANANANANANANANANA
us-gaap:CostOfRevenue ████▇▇▇▇█▇▆▅▅▅▅▅▅▅▅▄▃▁▁▁▁209521322111205620012015204120312069188017721681164316401626160315901559155414941197966980947913
us-gaap:CostOfGoodsAndServicesSold ████▇▇▇▇█▆▆▅▅▅▅▅▄▄▄▄▃▁▁▁▁209521322111205620012015204120312069178517151636160415991584155515171504150714441176966980947913
us-gaap:GrossProfit ▅▆▆▆▆▅▆▇▆█▇▇▆▆▆▆▆▅▅▆▂▂▂▂▁728820817824789772789835779915882861803788788826777740762774596546571568516
us-gaap:SellingGeneralAndAdministrativeExpense ▅▅▅▅▅▅▄▅▅█▇▆▆▅▅▅▅▅▄▅▅▂▂▁▁395413401415393396381395397492465435419406400408411404382392415309305297284
us-gaap:OperatingIncomeLoss ▁███▇▇██▇████▇▇█▇▆▇▇▅▆▆▆▆-192336339335318307343369305330341336332323324366301243306321130219241246203
 us-gaap:OperatingIncomeLoss us-gaap:StatementBusinessSegments lh:LabCorpDiagnostics▁▄▄▇▅▃▆█▆▇██▇▅▇█▅▂▆▆▃▂▅▅▃188243262312268237289336303318336334309277305330277219290303222202270277232
us-gaap:InterestExpense ▄▄▄▄▄▄▄▄▄▅▄▄▃▃▄▃▄▄▄▄█▂▁▁▁556460595658596363675955525258535456555710432252525
us-gaap:OtherNonoperatingIncomeExpense ▂▃▂▂▂▁█▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂-16152-10-10-412092-30-40-33-5-26-3-3-21-3076
us-gaap:NonoperatingIncomeExpense ▂▃▂▂▂▁█▂▂▂▂▂▂▂▂▂▂▂▂▂▁▃▃▄▃-75-43-52-65-63-93156-56-63-65-60-50-53-46-60-53-45-57-56-57-99-31-2214-15
us-gaap:IncomeTaxExpenseBenefit ▅▅▅▅▅█▆▅▅▁▆▅▅▅▅▆▅▅▆▅▅▅▅▅▅49656679683841807869-4209796879283114957197952967819074
us-gaap:IncomeTaxesPaidNet ▁▃▄▇▁▇▅▇▂▅█▇▂▅▆█▃▅▅▅▂▅▆▆▂53562121-21148612424841351161184961323273856723731001028
us-gaap:ProfitLoss ▁▅▅▄▄▄▅▅▄█▄▄▄▄▄▅▄▄▄▄▃▄▄▄▄-3162272211901851583192341727091831881921841791981601141531681119137141113
us-gaap:ComprehensiveIncomeNetOfTax ▁▆▅▅▅▄▆▄▅█▅▆▅▃▅▄▅▄▄▅▃▄▄▅▄-462356130218209102318108225713222331246-9915899269-484194-1196811915492
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest ▁▆▅▅▅▄▆▄▅█▅▆▅▃▅▄▅▄▄▅▃▄▄▅▄-462357130218209102318108225716225331246-9815999269-484195-1196911915492
us-gaap:NetIncomeLoss ▁▅▅▄▄▄▅▅▄█▄▄▄▄▄▅▄▄▄▄▃▄▄▄▄-3172272201901851573182331737061801881921841791981601141521680119137141113
us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted ▁▅▅▄▄▄▅▅▄█▄▄▄▄▄▅▄▄▄▄▃▄▄▄▄-3172272201901851573182331737061801841921841791981601141521680119137141113
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest ▁▁▁▁▁▁▁▁▁██▁▁▁▁▁▁▁▁▁▁▁▁▁▁0000000002200000000000000
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
us-gaap:Assets ████▇▇▇▇▇▇▇▆▆▆▆▆▆▆▆▆▆▁▁▁▁1729818046178471774416970161851666116504168311656816691149021442814247144831419914410142211442214465141507301723171446992
us-gaap:Liabilities ████▇▆▇▇▇▇█▆▆▆▆▆▆▆▇▇▇▁▁▁▁102591045910597105809840919493929446982797171053990088761872689448870922892629493967996164463444244694472
us-gaap:LiabilitiesAndStockholdersEquity ████▇▇▇▇▇▇▇▆▆▆▆▆▆▆▆▆▆▁▁▁▁1729818046178471774416970161851666116504168311656816691149021442814247144831419914410142211442214465141507301723171446992
us-gaap:StockholdersEquity ▇██▇▇▇█▇▇▇▆▆▅▅▅▅▅▄▄▄▄▁▁▁▁7020756772317144711169717248703769846830612558785650550555235313516649444913476945172820277026562501
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▇██▇▇▇▆▆▆▅▄▄▄▃▃▃▃▂▂▂▂▂▁▁▁7529790376767455726570796921660363696196551753365148495547704581438342234108395537863786368535533408
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
us-gaap:AssetsCurrent ▇▇▇▆▇▆█▇▇▆▇▅▅▅▆▆▆▆▆▅▄▂▂▂▁2891298129872848288528353274302128962682290025152486247826542644274426632707258623281692168715651420
us-gaap:CashAndCashEquivalentsAtCarryingValue ▂▂▂▁▂▃█▁▂▂▃▂▃▃▅▅▆▆▆▅▃▅▅▄▂323337361265348426892221361316409299365433567639696716713619446580575479338
us-gaap:AccountsReceivableNetCurrent ▇▇███▇▇▇█▇▇▆▆▅▆▅▅▅▅▄▄▁▁▁▁148215431617157615631467153615201613148115561379135613281346131413281217123512011187815841832822
us-gaap:InventoryNet █▇▇▆▇▇▇▇▆▆▆▅▅▅▅▄▄▄▄▄▄▁▁▁▁254244234219233237233230226227217209199205198189188191181182186139138134134
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
us-gaap:PropertyPlantAndEquipmentNet ██▇█▇▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▄▁▁▁▁260926362462254424571784173417101749174817361717172017181730174117711747180618311597786754741733
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures ▃▆▆▆▃▂▁▁▁▁▂▃▁▁▂▂▂▁▂▃▇▇██▆67848686666057585858646758576061615861688892949687
us-gaap:Goodwill ▇███▇▇▇▇██▇▆▆▆▆▆▆▆▅▅▆▁▁▁▁7388786578157843738573607362742376157530732566416502642463896218625262276068613662823099306630693067
 us-gaap:Goodwill us-gaap:StatementBusinessSegments lh:CovanceDrugDevelopment▇███▇▇▇▇▇▇▇▆▆▆▆▆▆▆▆▆▆▁367741434102418037393721371337483769368535442862280227792847288030123090301830863286110NANANA
 us-gaap:Goodwill us-gaap:StatementBusinessSegments lh:LabCorpDiagnostics▇▇▇▇▆▆▆▇██▇▇▇▆▆▄▃▂▂▂▁▁3711372137123663364636383649367438463844378037793700364435413338324031373050305029952988NANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▇▇▇▇▇▇▇▇███▆▆▆▆▅▆▅▆▆▆▁▁▁▁3905403440214015388439113990404942974340441536213469340034573357341033233561364436031475148915451538
 us-gaap:IntangibleAssetsNetExcludingGoodwill lh:ScheduleOfOtherIntangibleAssetsByMajorClass us-gaap:CustomerRelationships▇▇▇▇▇▇▇▇███▆▆▆▆▆▆▆▆▆▆▁▁▁▁304331123096307429462972300930633269328333262608247624202433242224622407259126262650754746763778
 us-gaap:IntangibleAssetsNetExcludingGoodwill lh:ScheduleOfOtherIntangibleAssetsByMajorClass us-gaap:LicensingAgreements▁▂▂▂▂▁▂▂▂▂▃▂▂▂▂▂▂▁▄▅▅▆▇█▇444480471476467457483475483495500481468464475482479451555591582635659691667
us-gaap:OtherAssetsNoncurrent ▇██▇▄▃▃▃▃▃▄▅▂▂▂▂▂▃▃▂▄▂▁▁▁430435458403288231239239212205247337190165189173167201217197250154138126145
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
us-gaap:LiabilitiesCurrent ▇██▇█▅▆▆▆▆▄▅▅▅▅▃▄▅▅▅▃▂▁▁▁245826552554249525261878210621212104204615371805175318271912127116421701184418231412976749740753
us-gaap:DebtCurrent ▅▅▆▆▆▁▅▅▅▅▁▆▆▆█▂▅▅██▄▄▂▂▂4174155025025011741741741741718519519549698874254246746743483479797105
us-gaap:NotesPayableCurrent ██▄▄▄▄▄▄▄▄▄▄▄▁22111111111110NANANANANANANANANANANA
us-gaap:AccountsPayableCurrent ▆▇▇▆▇▇▅▅▅█▇▅▅▅▄▄▄▅▄▄▄▁▁▁▁568632607531592634497488519663595491484508454443466497445438420282286280281
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
us-gaap:LongTermDebtNoncurrent ▆▆▆▆▅▆▆▆▇▇█▆▅▅▅▆▆▆▆▆▇▁▁▁▁5790578961016135549560416044603963596344720056085401530054735967596959926006611365972682291729092903
 us-gaap:LongTermDebtNoncurrent us-gaap:LongtermDebtType lh:Seniornotesdue2024Member█▁█████████600400600600600600600600600600600NANA0NANANANANANANANANANANA
 us-gaap:LongTermDebtNoncurrent us-gaap:LongtermDebtType lh:Seniornotesdue2025Member█████████████████████▁1000100010001000100010001000100010001000100010001000100010001000100010001000100010000NANANA
 us-gaap:LongTermDebtNoncurrent us-gaap:LongtermDebtType lh:Seniornotesdue2027▄▄▄▄▄▄▄▄▄▄▄600600600600600600600600600600600NANA0NANANANANANANANANANANA
 us-gaap:LongTermDebtNoncurrent us-gaap:LongtermDebtType lh:Seniornotesdue2045█████████████████████▁9009009009009009009009009009009009009009009009009009009009009000NANANA
us-gaap:OtherLiabilitiesNoncurrent ▇▇▆▇▄▅▆▇▇▇████▅▅▅▅▆▇▅▃▁▂▂369383348368307334343371372378403401394392330320322323351370338274223249254
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
us-gaap:StockholdersEquity ▇██▇▇▇█▇▇▇▆▆▅▅▅▅▅▄▄▄▄▁▁▁▁7020756772317144711169717248703769846830612558785650550555235313516649444913476945172820277026562501
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▇██▇▇▇▆▆▆▅▄▄▄▃▃▃▃▂▂▂▂▂▁▁▁7529790376767455726570796921660363696196551753365148495547704581438342234108395537863786368535533408
us-gaap:CommonStockValue ▁▁▁▁▆▆▆██████████████▃▃▃▃9999111111121212121212121212121212121210101010
us-gaap:RetainedEarningsAccumulatedDeficit ▇██▇▇▇▆▆▆▅▄▄▄▃▃▃▃▂▂▂▂▂▁▁▁7529790376767455726570796921660363696224551753365148495547704581438342234108395537863786368535533408
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▂▃▂▃▃▂▃▃▄▄▄▃▂▁▃▃▅▄▆▆▆▇███-517-372-502-411-439-463-407-407-281-335-342-384-527-581-378-357-258-287-168-99-131-10405845
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄█▇▅▄▇▅▆▄█▆▅▄▇▅▆▃▆▅▆▁▄▄▄▃203569455253165486297367154564350310233448260343123384288396-86213175207142
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▇▇▆▇▇█▇▇▇▅▆▇▇▇▇▇▇▇▇▁▇▇▇▇-106-152-239-750-140-146549-122-74-178-1313-491-245-219-317-106-151-128-82-132-3651-147-55-39-108
us-gaap:NetCashProvidedByUsedInFinancingActivities ▂▂▂▃▂▁▂▂▂▂▄▂▂▂▂▂▂▂▂▂█▂▂▂▂-102-449-115414-103-802-174-373-40-4791064106-59-348-3-3013-239-86-1183629-58-18-25-98
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄█▇▅▄▇▅▆▄█▆▅▄▇▅▆▃▆▅▆▁▄▄▄▃203569455253165486297367154564350310233448260343123384288396-86213175207142
us-gaap:NetIncomeLoss ▁▅▅▄▄▄▅▅▄█▄▄▄▄▄▅▄▄▄▄▃▄▄▄▄-3172272201901851573182331737061801881921841791981601141521680119137141113
us-gaap:ProfitLoss ▁▅▅▄▄▄▅▅▄█▄▄▄▄▄▅▄▄▄▄▃▄▄▄▄-3162272211901851583192341727091831881921841791981601141531681119137141113
us-gaap:DepreciationDepletionAndAmortization ▇█▇▇▇▇▆▇▇▇▆▆▆▆▆▆▆▅▆▅▄▁▁▁▁14415514413913713713313814214513312712813012112512211312111810463586260
us-gaap:IncreaseDecreaseInInventories ▇▆█▅▂▇▅▆▃▇▅▅▁▅▅▃▂▇▃▁▁▃▅▃▂107125-31046-11055-4451-290-5-4-140-2
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▇▇▆▇▇█▇▇▇▅▆▇▇▇▇▇▇▇▇▁▇▇▇▇-106-152-239-750-140-146549-122-74-178-1313-491-245-219-317-106-151-128-82-132-3651-147-55-39-108
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▆█▅▅▅█▆▅▄▆▄▄▄▄▃▄▄▅▄▄▁▂▂▂▃10612892859412297877296756972746667718567693346524856
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▂▂▂▃▂▁▂▂▂▂▄▂▂▂▂▂▂▂▂▂█▂▂▂▂-102-449-115414-103-802-174-373-40-4791064106-59-348-3-3013-239-86-1183629-58-18-25-98
us-gaap:PaymentsForRepurchaseOfCommonStock ▃▂▃▄▃█▄▂▂▂▂▃▄▂▁▁▁▁▁▁▁▂▂▂▃1005010019910040015075754042108148430000000396556107
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value999911111112121212121212121212121212121010101010101111111111111111121212
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.20.20.20.20.20.20.2

Common Stock Shares Issued

us-gaap:StatementClassOfStock

us-gaap:CommonStockSharesIssued

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value97979797123122124125125125125125125125
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value9797979798981011021021011021021021021021021021011011001008484848485879092939495979799101100102
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value9798989910210310310310310410410310310210293868686909394969899102102103104105106
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value9797989810110110110210210210210210110110091848485899292959697100100100102103104
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-3.272.342.261.941.881.583.142.291.76.911.771.841.871.791.741.941.581.131.511.670.011.411.621.671.331.461.661.651.581.281.561.591.661.361.341.221.271.291.371.481.27
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-3.272.322.251.931.861.563.12.271.676.811.741.821.841.751.711.911.551.111.491.640.011.371.591.641.311.431.631.621.561.261.531.561.631.341.311.21.231.261.341.461.25
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value2823295329282881279127872831286628482744265525422447242824142430236823002317226917931512155115161430
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

lh:CovanceDrugDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1143120111751126107410991081105410781002867807
Percentage of Revenues40.540.740.139.138.539.438.236.837.936.532.731.8
Percentage of Revenues40.540.740.139.138.539.438.236.837.936.532.731.8
Percentage of Revenues lh:CovanceDrugDevelopment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value170217581759176017221694175218141770174217541721
Percentage of Revenues60.359.560.161.161.760.861.963.362.163.566.167.7
Percentage of Revenues60.359.560.161.161.760.861.963.362.163.566.167.7
Percentage of Revenues lh:LabCorpDiagnostics100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Sales Revenue Net

Cost Of Revenue

us-gaap:CostOfRevenue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value209521322111205620012015204120312069188017721681164316401626160315901559155414941197966980947913914890868863843847836815800748704686
Percentage of CostOfRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues74.272.272.171.471.772.372.170.972.768.566.866.167.267.667.366.067.267.867.165.966.863.963.262.563.90.00.00.00.00.00.00.00.00.00.00.00.0

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value209521322111205620012015204120312069178517151636160415991584155515171504150714441176966980947913914890868863843847836815800748704686
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues74.272.272.171.471.772.372.170.972.765.164.664.465.665.965.664.064.165.465.063.665.663.963.262.563.90.00.00.00.00.00.00.00.00.00.00.00.0

Gross Profit

us-gaap:GrossProfit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value728820817824789772789835779915882861803788788826777740762774596546571568516526547577572538556579576549568588568529527533506
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues25.827.827.928.628.327.727.929.127.333.433.233.932.832.432.734.032.832.232.934.133.236.136.837.536.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Research And Development Expense

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value395413401415393396381395397492465435419406400408411404382392415309305297284279280283285279271283322282270245246
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues14.014.013.714.414.114.213.513.813.917.917.517.117.116.716.616.817.417.616.517.323.120.519.719.619.90.00.00.00.00.00.00.00.00.00.00.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-192336339335318307343369305330341336332323324366301243306321130219241246203244269262245276287239225235235270234
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-6.811.411.611.611.411.012.112.910.712.012.913.213.613.313.415.112.710.613.214.27.314.515.616.314.20.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementBusinessSegments

lh:CovanceDrugDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-33813312365881088768387143355682517463284954-5424754
Percentage of OperatingIncomeLoss175.939.836.419.627.735.225.618.612.621.612.610.716.925.516.020.420.911.516.017.1-41.811.02.92.12.2
Percentage of Revenues-12.04.54.22.33.23.93.12.41.42.61.61.42.33.42.13.12.71.22.12.4-3.01.60.50.30.3
Percentage of Revenues lh:CovanceDrugDevelopment-29.611.110.55.88.29.98.16.53.67.15.04.40.00.00.00.00.00.00.00.00.00.00.00.00.0

lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value188243262312268237289336303318336334309277305330277219290303222202270277232
Percentage of OperatingIncomeLoss-97.872.277.193.184.377.284.391.199.396.398.599.693.085.894.390.291.890.394.694.4171.192.4112.1112.3114.3
Percentage of Revenues6.78.29.010.89.68.510.211.710.711.612.713.212.611.412.713.611.79.612.513.412.413.417.418.316.2
Percentage of Revenues lh:LabCorpDiagnostics11.113.814.917.715.614.016.518.517.118.319.219.40.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Corporate



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-06-30
Value-42-40-46-42-38-38-33-35-36-35-37-34-32-36-33-38-38-4-41-46-38-178-155-151-148-138-134-136-130
Percentage of OperatingIncomeLoss22.0-12.0-13.6-12.7-12.0-12.4-9.9-9.7-12.0-10.7-11.1-10.2-9.9-11.3-10.3-10.6-12.6-1.8-13.6-14.3-29.3-81.4-64.5-61.6-72.9-56.8-49.8-52.2-47.2
Percentage of Revenues-1.5-1.4-1.6-1.5-1.4-1.4-1.2-1.3-1.3-1.3-1.4-1.3-1.3-1.5-1.4-1.6-1.6-0.2-1.8-2.0-2.1-11.8-10.0-10.0-10.40.00.00.00.0
Percentage of Revenues us-gaap:Corporate0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Expense

us-gaap:InterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value556460595658596363675955525258535456555710432252525242324242121-20-21-24-21-14-14
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1.92.22.12.12.02.12.12.22.22.52.32.22.12.22.42.22.32.52.42.65.82.11.71.71.80.00.00.00.00.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-16152-10-10-412092-30-40-33-5-26-3-3-21-30764000-60-100-100
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-0.60.50.1-0.4-0.4-1.57.40.1-0.10.0-0.2-0.0-0.10.2-0.2-0.10.3-0.1-0.1-0.10.1-0.2-0.00.50.50.00.00.00.00.00.00.00.00.00.00.00.0

Income Loss From Continuing Operations Before Income Taxes Domestic

Income Loss From Continuing Operations Before Income Taxes Foreign

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-06-30
Value-75-43-52-65-63-93156-56-63-65-60-50-53-46-60-53-45-57-56-57-99-31-2214-151419-2019
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-2.7-1.5-1.8-2.3-2.3-3.35.5-2.0-2.2-2.4-2.3-2.0-2.2-1.9-2.5-2.2-1.9-2.5-2.4-2.5-5.6-2.1-1.40.9-1.10.00.00.00.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value49656679683841807869-4209796879283114957197952967819074819793781021078280837310286
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1.72.22.32.82.513.86.42.72.4-15.33.73.83.63.83.54.74.03.14.24.21.64.55.36.05.20.00.00.00.00.00.00.00.00.00.00.00.0

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value53562121-2114861242484135116118496132327385672373100102811877140710914510
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.21.22.14.2-0.14.13.14.30.93.15.14.60.53.54.05.41.43.23.73.01.34.86.46.80.60.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-3162272211901851583192341727091831881921841791981601141531681119137141113148152147148153162137126130143157136
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-11.27.77.56.66.75.711.38.26.125.86.97.47.97.67.48.26.85.06.67.40.17.98.99.37.90.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-462356130218209102318108225713222331246-9915899269-484194-119681191549216313413116814217695127143159134149
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-16.412.14.57.67.53.711.23.87.926.08.413.010.1-4.16.64.111.4-0.23.68.6-6.74.57.710.26.50.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value-462357130218209102318108225716225331246-9815999269-484195-119691191549216413513216814317698131146
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-16.412.14.57.67.53.711.23.87.926.18.513.010.1-4.16.64.111.4-0.23.68.6-6.74.67.710.26.50.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-3172272201901851573182331737061801881921841791981601141521680119137141113126148151147120148153161135134122127131140153132
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-11.27.77.56.66.65.711.38.26.125.86.87.47.97.67.48.26.85.06.67.40.07.98.89.37.90.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-3172201901851573182331737061801881921841891981601141521690119137141113147161134122127140153132
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0105.5100.0100.0100.1100.1100.4100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-11.27.56.66.65.711.38.26.125.86.87.47.97.67.88.26.85.06.67.40.07.98.89.37.90.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Diluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-3172272201901851573182331737061801841921841791981601141521680119137141113148151147148153161134122127140153132
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-11.27.77.56.66.65.711.38.26.125.86.87.37.97.67.48.26.85.06.67.40.07.98.89.37.90.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value0000000002200000000000000000000333333
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.0-0.00.10.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value17298180461784717744169701618516661165041683116568166911490214428142471448314199144101422114422144651415073017231714469926965668665916569679568146098613061366053616862016187
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value1025910459105971058098409194939294469827971710539900887618726894488709228926294939679961644634442446944724455410139083770405640763446351236123490356737803700
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets59.358.059.459.658.056.856.457.258.458.763.160.460.761.261.862.564.065.165.866.968.061.161.462.664.064.061.359.357.459.759.856.557.358.957.757.861.059.8

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value17298180461784717744169701618516661165041683116568166911490214428142471448314199144101422114422144651415073017231714469926965668665916569679568146098613061366053616862016187
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value7020756772317144711169717248703769846830612558785650550555235313516649444913476945172820277026562501249125652663277827172716263125972503254325792400246622702209215821061688
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets40.641.940.540.341.943.143.542.641.541.236.739.439.238.638.137.435.934.834.133.031.938.638.337.235.835.838.440.442.340.039.943.242.440.842.041.838.739.90.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value-517-372-502-411-439-463-407-407-281-333-342-384-527-581-378-357-258-367-168-99-131-10405845665236536969495945701091048878597861-16
Percentage of StockholdersEquity-7.4-4.9-6.9-5.8-6.2-6.6-5.6-5.8-4.0-4.9-5.6-6.5-9.3-10.6-6.8-6.7-5.0-7.4-3.4-2.1-2.9-0.41.52.21.82.72.01.41.92.62.61.92.31.82.84.24.43.63.42.73.62.9-1.0
Percentage of Assets-3.0-2.1-2.8-2.3-2.6-2.9-2.4-2.5-1.7-2.0-2.1-2.6-3.7-4.1-2.6-2.5-1.8-2.6-1.2-0.7-0.9-0.10.60.80.71.00.80.60.81.01.00.81.00.71.21.81.71.40.00.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value0264791140114511828193419691989199819722051213121302088202219741937187718230000000000000072175300036237
Percentage of StockholdersEquity0.00.40.71.319.720.825.227.528.229.132.633.636.338.738.639.339.239.939.439.440.40.00.00.00.00.00.00.00.00.00.00.00.00.00.02.80.72.20.00.00.01.714.1
Percentage of Assets0.00.10.30.58.39.011.011.711.712.012.013.214.215.014.714.714.013.913.413.012.90.00.00.00.00.00.00.00.00.00.00.00.00.00.01.20.30.90.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value9999111111121212121212121212121212121210101010101011111111111111111212121212121212
Percentage of StockholdersEquity0.10.10.10.10.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.30.30.40.40.40.40.40.40.40.40.40.40.40.40.50.50.50.50.50.50.60.60.60.8
Percentage of Assets0.10.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.20.20.20.20.20.20.20.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value7529790376767455726570796921660363696196551753365148495547704581438342234108395537863786368535533408337334613574366735883587352234693387340233263203324631143072300229272384
Percentage of StockholdersEquity107.2104.4106.2104.4102.2101.695.593.891.290.790.190.891.190.086.486.284.885.483.682.983.8134.2133.0133.8136.3135.4134.9134.2132.0132.1132.1133.9133.6135.3133.8128.9133.5131.6137.2139.1139.1139.0141.2
Percentage of Assets43.543.843.042.042.843.741.540.037.837.433.135.835.734.832.932.330.429.728.527.326.851.951.049.748.848.451.854.255.852.852.657.856.655.256.253.951.752.50.00.00.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value0000-1127-1108-1106-1105-1085-1060-1059-1058-1033-1012-1011-1011-993-978-976-975-973-965-965-965-963-958-958-958-954-951-951-951-943-940-940-940-937-934-934-934-934-932-929
Percentage of StockholdersEquity0.00.00.00.0-15.9-15.9-15.3-15.7-15.5-15.5-17.3-18.0-18.3-18.4-18.3-19.0-19.2-19.8-19.9-20.5-21.5-34.2-34.8-36.3-38.5-38.5-37.4-36.0-34.3-35.0-35.0-36.2-36.3-37.6-37.0-36.5-39.1-37.9-41.2-42.3-43.3-44.3-55.1
Percentage of Assets0.00.00.00.0-6.6-6.8-6.6-6.7-6.4-6.4-6.3-7.1-7.2-7.1-7.0-7.1-6.9-6.9-6.8-6.7-6.9-13.2-13.4-13.5-13.8-13.8-14.3-14.5-14.5-14.0-14.0-15.6-15.4-15.3-15.5-15.3-15.1-15.10.00.00.00.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value28912981298728482885283532743021289626822900251524862478265426442744266327072586232816921687156514201432121211481190139114551063108110841072108311471143
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets16.716.516.716.117.017.519.718.317.216.217.416.917.217.418.318.619.018.718.817.916.523.223.321.920.320.618.117.418.120.521.417.417.617.717.717.618.518.5

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value3233373612653484268922213613164092993654335676396967167136194465805754793384041741111854664661241291598511819523096103172148219
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.91.92.01.52.12.65.41.32.11.92.52.02.53.03.94.54.85.04.94.33.27.98.06.74.85.82.61.72.86.96.82.02.12.61.41.93.23.70.00.00.00.00.0

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value148215431617157615631467153615201613148115561379135613281346131413281217123512011187815841832822784813815793718768735751699718714717655
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.68.69.18.99.29.19.29.29.68.99.39.39.49.39.39.39.28.68.68.38.411.211.611.711.811.312.212.412.110.611.312.112.311.411.911.611.610.6

Inventory Net

us-gaap:InventoryNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value25424423421923323723323022622721720919920519818918819118118218613913813413413612612612412111811410711010310698103
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.51.41.31.21.41.51.41.41.31.41.31.41.41.41.41.31.31.31.31.31.31.91.91.91.92.01.91.91.91.81.71.91.71.81.71.71.61.7

Inventory Finished Goods

Property Plant And Equipment Gross

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value260926362462254424571784173417101749174817361717172017181730174117711747180618311597786754741733707672646634630612576577578577586579586
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets15.114.613.814.314.511.010.410.410.410.610.411.511.912.111.912.312.312.312.512.711.310.810.410.410.510.210.19.89.79.39.09.49.49.49.59.59.39.5

Investments In Affiliates Subsidiaries Associates And Joint Ventures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value6784868666605758585864675857606161586168889294968788868786788079797675798278
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.50.50.50.40.40.30.40.30.40.40.50.40.40.40.40.40.40.40.50.61.31.31.41.21.31.31.31.31.11.21.31.31.31.21.31.31.3

Goodwill

us-gaap:Goodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value738878657815784373857360736274237615753073256641650264246389621862526227606861366282309930663069306730222990298629112901287726942680268126412644261326011897
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets42.743.643.844.243.545.544.245.045.245.443.944.645.145.144.143.843.443.842.142.444.442.442.443.043.943.444.745.344.342.742.244.243.743.743.642.942.142.00.0

us-gaap:StatementBusinessSegments

lh:CovanceDrugDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value367741434102418037393721371337483769368535442862280227792847288030123090301830863286110110
Percentage of Goodwill49.852.752.553.350.650.650.450.549.548.948.443.143.143.344.646.348.249.649.750.352.33.63.7
Percentage of Assets21.323.023.023.622.023.022.322.722.422.221.219.219.419.519.720.320.921.720.921.323.21.51.6
Percentage of Assets lh:CovanceDrugDevelopment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value37113721371236633646363836493674384638443780377937003644354133383240313730503050299529882912
Percentage of Goodwill50.247.347.546.749.449.449.649.550.551.151.656.956.956.755.453.751.850.450.349.747.796.496.3
Percentage of Assets21.520.620.820.621.522.521.922.322.923.222.725.425.625.624.523.522.522.121.121.121.240.941.8
Percentage of Assets lh:LabCorpDiagnostics0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value39054034402140153884391139904049429743404415362134693400345733573410332335613644360314751489154515381572160116061627166716721588161616201592167616761674
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets22.622.422.522.622.924.224.024.525.526.226.524.324.023.923.923.623.723.424.725.225.520.220.621.622.022.623.924.424.824.524.526.026.426.426.327.227.027.1

lh:ScheduleOfOtherIntangibleAssetsByMajorClass

lh:PatentsLicensesAndTechnology



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value205217221228231236246250259269273228229232254162171161778123302730283033353441
Percentage of IntangibleAssetsNetExcludingGoodwill5.35.45.55.76.06.06.26.26.06.26.26.36.66.87.34.95.04.92.22.20.72.01.82.01.82.02.12.22.12.5
Percentage of Assets1.21.21.21.31.41.51.51.51.51.61.61.51.61.61.81.11.21.10.50.60.20.40.40.40.40.40.50.50.50.6
Percentage of Assets lh:PatentsLicensesAndTechnology0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CustomerRelationships



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value304331123096307429462972300930633269328333262608247624202433242224622407259126262650754746763778781786799796812
Percentage of IntangibleAssetsNetExcludingGoodwill77.977.177.076.675.876.075.475.676.175.675.372.071.471.270.472.272.272.472.872.173.651.150.149.450.649.749.149.848.948.7
Percentage of Assets17.617.217.317.317.418.418.118.619.419.819.917.517.217.016.817.117.116.918.018.218.710.310.310.711.111.211.812.112.112.0
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LicensingAgreements



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value444480471476467457483475483495500481468464475482479451555591582635659691667694715701729743
Percentage of IntangibleAssetsNetExcludingGoodwill11.411.911.711.912.011.712.111.711.211.411.313.313.513.713.714.414.113.615.616.216.243.144.344.743.444.244.743.744.844.6
Percentage of Assets2.62.72.62.72.82.82.92.92.93.03.03.23.23.33.33.43.33.23.94.14.18.79.19.79.610.010.710.611.110.9
Percentage of Assets us-gaap:LicensingAgreements0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncompeteAgreements



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value283031252323222427293037251011121113131412131416171615161212
Percentage of IntangibleAssetsNetExcludingGoodwill0.70.80.80.60.60.60.60.60.60.70.71.00.70.30.30.40.30.40.40.40.40.91.01.01.21.00.91.00.80.8
Percentage of Assets0.20.20.20.10.10.10.10.10.20.20.20.30.20.10.10.10.10.10.10.10.10.20.20.20.30.20.20.20.20.2
Percentage of Assets us-gaap:NoncompeteAgreements0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TradeNames



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value178188195204209214221229249254277257261264274271280284318325328414144464850525557
Percentage of IntangibleAssetsNetExcludingGoodwill4.64.74.95.15.45.55.65.75.85.96.37.17.57.87.98.18.28.69.08.99.12.82.82.93.03.13.23.33.43.5
Percentage of Assets1.01.01.11.21.21.31.31.41.51.51.71.71.81.91.91.91.92.02.22.32.30.60.60.60.70.70.80.80.80.9
Percentage of Assets us-gaap:TradeNames0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UseRights



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value5556667778788885445540
Percentage of IntangibleAssetsNetExcludingGoodwill0.10.10.10.20.20.20.20.20.20.20.20.20.20.30.30.20.10.10.10.10.10.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.10.00.10.10.10.10.00.00.00.00.00.00.0
Percentage of Assets us-gaap:UseRights0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Deferred Tax Assets Liabilities Net

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value4304354584032882312392392122052473371901651891731672012171972501541381261451431221161181241159694949398102103
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.52.42.62.31.71.41.41.41.31.21.52.31.31.21.31.21.21.41.51.41.82.11.91.82.12.11.81.81.81.81.71.61.51.51.51.61.61.7

Liabilities Current

us-gaap:LiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value24582655255424952526187821062121210420461537180517531827191212711642170118441823141297674974075373568065574010281119718769797982102511991120
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.214.714.314.114.911.612.612.912.512.39.212.112.212.813.29.011.412.012.812.610.013.410.410.410.810.610.29.911.315.116.411.812.513.016.216.619.318.1

Debt Current

us-gaap:DebtCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value4174155025025011741741741741718519519549698874254246746743483479797105111110119147480485134136135214215396361
Percentage of DebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.42.32.82.83.00.12.52.52.52.50.13.53.63.94.80.63.03.04.74.72.54.81.31.41.51.61.71.82.37.17.12.22.22.23.53.56.45.8

Notes Payable Current

us-gaap:NotesPayableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value22111111111110
Percentage of NotesPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Long Term Debt Current

Accounts Payable Current

us-gaap:AccountsPayableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value568632607531592634497488519663595491484508454443466497445438420282286280281304262253246236247234225257222212215257
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.33.53.43.03.53.93.03.03.14.03.63.33.43.63.13.13.23.53.13.03.03.94.03.94.04.43.93.83.83.53.63.83.74.23.73.43.54.2

Other Accrued Liabilities Current

Taxes Payable Current

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value57905789610161355495604160446039635963447200560854015300547359675969599260066113659726822917290929032889255323902175217521751975198520851769178818071826
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets33.532.134.234.632.437.336.336.637.838.343.137.637.437.237.842.041.442.141.642.346.636.740.340.741.541.538.236.333.132.031.932.432.434.029.229.029.229.5

us-gaap:LongtermDebtType

lh:SeniorLongTermNotesDue2020



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312013-03-312012-12-312011-12-312010-12-31
Value300300600600600600600600600600600600600600600600600600600600600600600600
Percentage of LongTermDebtNoncurrent5.25.29.89.810.99.99.99.99.49.58.310.711.111.311.010.110.110.022.420.827.627.628.832.8
Percentage of Assets1.71.73.43.43.53.73.63.63.63.63.64.04.24.24.14.24.24.28.28.69.18.89.89.7
Percentage of Assets lh:SeniorLongTermNotesDue20200.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

lh:SeniorNotesDue2022



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-31
Value5005005005005005005005005005005005005005005005005005005005005005005005005005005005005005005000
Percentage of LongTermDebtNoncurrent8.68.68.28.19.18.38.38.37.97.96.98.99.39.49.18.48.48.38.38.27.618.617.117.217.217.319.620.923.023.023.00.0
Percentage of Assets2.92.82.82.82.93.13.03.03.03.03.03.43.53.53.53.53.53.53.53.53.56.86.97.07.27.27.57.67.67.47.30.0
Percentage of Assets lh:SeniorNotesDue20220.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

lh:Seniornotesdue2023



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value3003003003003003003003003003003003003003003003003003003003003003003003003003000
Percentage of LongTermDebtNoncurrent5.25.24.94.95.55.05.05.04.74.74.25.35.65.75.55.05.05.05.04.94.511.210.310.310.310.40.0
Percentage of Assets1.71.71.71.71.81.91.81.81.81.81.82.02.12.12.12.12.12.12.12.12.14.14.14.24.34.30.0
Percentage of Assets lh:Seniornotesdue20230.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

lh:Seniornotesdue2024Member



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value6004006006006006006006006006006000
Percentage of LongTermDebtNoncurrent10.46.99.89.810.99.99.99.99.49.58.30.0
Percentage of Assets3.52.23.43.43.53.73.63.63.63.63.60.0
Percentage of Assets lh:Seniornotesdue2024Member0.00.00.00.00.00.00.00.00.00.00.00.0

lh:Seniornotesdue2025Member



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value1000100010001000100010001000100010001000100010001000100010001000100010001000100010000
Percentage of LongTermDebtNoncurrent17.317.316.416.318.216.616.516.615.715.813.917.818.518.918.316.816.816.716.616.415.20.0
Percentage of Assets5.85.55.65.65.96.26.06.15.96.06.06.76.97.06.97.06.97.06.96.97.10.0
Percentage of Assets lh:Seniornotesdue2025Member0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

lh:Seniornotesdue2027



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value6006006006006006006006006006006000
Percentage of LongTermDebtNoncurrent10.410.49.89.810.99.99.99.99.49.58.30.0
Percentage of Assets3.53.33.43.43.53.73.63.63.63.63.60.0
Percentage of Assets lh:Seniornotesdue20270.00.00.00.00.00.00.00.00.00.00.00.0

lh:Seniornotesdue2045



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value9009009009009009009009009009009009009009009009009009009009009000
Percentage of LongTermDebtNoncurrent15.515.514.814.716.414.914.914.914.214.212.516.016.717.016.415.115.115.015.014.713.60.0
Percentage of Assets5.25.05.05.15.35.65.45.55.35.45.46.06.26.36.26.36.26.36.26.26.40.0
Percentage of Assets lh:Seniornotesdue20450.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value369383348368307334343371372378403401394392330320322323351370338274223249254266303303302307223227235227169166155151
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.12.12.02.11.82.12.12.32.22.32.42.72.72.82.32.32.22.32.42.62.43.83.13.53.63.84.54.64.64.53.33.73.83.72.82.72.52.4

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value7020756772317144711169717248703769846830612558785650550555235313516649444913476945172820277026562501249125652663277827172716263125972503254325792400246622702209215821061688
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets40.641.940.540.341.943.143.542.641.541.236.739.439.238.638.137.435.934.834.133.031.938.638.337.235.835.838.440.442.340.039.943.242.440.842.041.838.739.90.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value-517-372-502-411-439-463-407-407-281-333-342-384-527-581-378-357-258-367-168-99-131-10405845665236536969495945701091048878597861-16
Percentage of StockholdersEquity-7.4-4.9-6.9-5.8-6.2-6.6-5.6-5.8-4.0-4.9-5.6-6.5-9.3-10.6-6.8-6.7-5.0-7.4-3.4-2.1-2.9-0.41.52.21.82.72.01.41.92.62.61.92.31.82.84.24.43.63.42.73.62.9-1.0
Percentage of Assets-3.0-2.1-2.8-2.3-2.6-2.9-2.4-2.5-1.7-2.0-2.1-2.6-3.7-4.1-2.6-2.5-1.8-2.6-1.2-0.7-0.9-0.10.60.80.71.00.80.60.81.01.00.81.00.71.21.81.71.40.00.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value0264791140114511828193419691989199819722051213121302088202219741937187718230000000000000072175300036237
Percentage of StockholdersEquity0.00.40.71.319.720.825.227.528.229.132.633.636.338.738.639.339.239.939.439.440.40.00.00.00.00.00.00.00.00.00.00.00.00.00.02.80.72.20.00.00.01.714.1
Percentage of Assets0.00.10.30.58.39.011.011.711.712.012.013.214.215.014.714.714.013.913.413.012.90.00.00.00.00.00.00.00.00.00.00.00.00.00.01.20.30.90.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value9999111111121212121212121212121212121210101010101011111111111111111212121212121212
Percentage of StockholdersEquity0.10.10.10.10.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.30.30.40.40.40.40.40.40.40.40.40.40.40.40.50.50.50.50.50.50.60.60.60.8
Percentage of Assets0.10.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.20.20.20.20.20.20.20.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value7529790376767455726570796921660363696196551753365148495547704581438342234108395537863786368535533408337334613574366735883587352234693387340233263203324631143072300229272384
Percentage of StockholdersEquity107.2104.4106.2104.4102.2101.695.593.891.290.790.190.891.190.086.486.284.885.483.682.983.8134.2133.0133.8136.3135.4134.9134.2132.0132.1132.1133.9133.6135.3133.8128.9133.5131.6137.2139.1139.1139.0141.2
Percentage of Assets43.543.843.042.042.843.741.540.037.837.433.135.835.734.832.932.330.429.728.527.326.851.951.049.748.848.451.854.255.852.852.657.856.655.256.253.951.752.50.00.00.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value0000-1127-1108-1106-1105-1085-1060-1059-1058-1033-1012-1011-1011-993-978-976-975-973-965-965-965-963-958-958-958-954-951-951-951-943-940-940-940-937-934-934-934-934-932-929
Percentage of StockholdersEquity0.00.00.00.0-15.9-15.9-15.3-15.7-15.5-15.5-17.3-18.0-18.3-18.4-18.3-19.0-19.2-19.8-19.9-20.5-21.5-34.2-34.8-36.3-38.5-38.5-37.4-36.0-34.3-35.0-35.0-36.2-36.3-37.6-37.0-36.5-39.1-37.9-41.2-42.3-43.3-44.3-55.1
Percentage of Assets0.00.00.00.0-6.6-6.8-6.6-6.7-6.4-6.4-6.3-7.1-7.2-7.1-7.0-7.1-6.9-6.9-6.8-6.7-6.9-13.2-13.4-13.5-13.8-13.8-14.3-14.5-14.5-14.0-14.0-15.6-15.4-15.3-15.5-15.3-15.1-15.10.00.00.00.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value999911111112121212121212121212121212121010101010101111111111111111121212
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.20.20.20.20.20.20.2

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value75297903767674557265707969216603636962245517533651484955477045814383422341083955378637863685355334083373346135743667358835873522346933873402332632033246
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets43.543.843.042.042.843.741.540.037.837.633.135.835.734.832.932.330.429.728.527.326.851.951.049.748.848.451.854.255.852.852.657.856.655.256.253.951.752.5

Treasury Stock Value

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-31
Value-517-372-502-411-439-463-407-407-281-335-342-384-527-581-378-357-258-287-168-99-131-10405845665236536969495945701091048861-16
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-3.0-2.1-2.8-2.3-2.6-2.9-2.4-2.5-1.7-2.0-2.1-2.6-3.7-4.1-2.6-2.5-1.8-2.0-1.2-0.7-0.9-0.10.60.80.71.00.80.60.81.01.00.81.00.71.21.81.71.40.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value203569455253165486297367154564350310233448260343123384288396-86213175207142198197176184215176216232
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues7.219.315.68.85.917.410.512.85.420.513.212.29.618.510.814.15.216.712.417.5-4.814.111.313.79.90.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-106-152-239-750-140-146549-122-74-178-1313-491-245-219-317-106-151-128-82-132-3651-147-55-39-108-61-36-41-72-44-88-177-56
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-3.8-5.1-8.2-26.1-5.0-5.319.4-4.3-2.6-6.5-49.5-19.3-10.0-9.0-13.2-4.4-6.4-5.6-3.6-5.8-203.6-9.7-3.6-2.6-7.60.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-102-449-115414-103-802-174-373-40-4791064106-59-348-3-3013-239-86-1183629-58-18-25-98-412-191-166-187-207-95-105-152
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-3.6-15.2-3.914.4-3.7-28.8-6.1-13.0-1.4-17.540.14.2-2.4-14.3-0.2-12.40.2-10.4-3.7-5.2202.4-3.9-1.2-1.7-6.80.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value203569455253165486297367154564350310233448260343123384288396-86213175207142198197176184215176216232
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues7.219.315.68.85.917.410.512.85.420.513.212.29.618.510.814.15.216.712.417.5-4.814.111.313.79.90.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-3172272201901851573182331737061801881921841791981601141521680119137141113126148151147120148153161135134122127131140153132
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-11.27.77.56.66.65.711.38.26.125.86.87.47.97.67.48.26.85.06.67.40.07.98.89.37.90.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-3172201901851573182331737061801881921841891981601141521690119137141113147161134122127140153132
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0105.5100.0100.0100.1100.1100.4100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-11.27.56.66.65.711.38.26.125.86.87.47.97.67.88.26.85.06.67.40.07.98.89.37.90.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-3162272211901851583192341727091831881921841791981601141531681119137141113148152147148153162137126130143157136
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-11.27.77.56.66.75.711.38.26.125.86.97.47.97.67.48.26.85.06.67.40.17.98.99.37.90.00.00.00.00.00.00.00.00.00.00.00.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value144155144139137137133138142145133127128130121125122113121118104635862605556575758505050
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value107125-31046-11055-4451-290-5-4-140-23-33-85-6-37
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-106-152-239-750-140-146549-122-74-178-1313-491-245-219-317-106-151-128-82-132-3651-147-55-39-108-61-36-41-72-44-88-177-56
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-3.8-5.1-8.2-26.1-5.0-5.319.4-4.3-2.6-6.5-49.5-19.3-10.0-9.0-13.2-4.4-6.4-5.6-3.6-5.8-203.6-9.7-3.6-2.6-7.60.00.00.00.00.00.00.00.0

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value106128928594122978772967569727466677185676933465248564134404529343424
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-102-449-115414-103-802-174-373-40-4791064106-59-348-3-3013-239-86-1183629-58-18-25-98-412-191-166-187-207-95-105-152
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-3.6-15.2-3.914.4-3.7-28.8-6.1-13.0-1.4-17.540.14.2-2.4-14.3-0.2-12.40.2-10.4-3.7-5.2202.4-3.9-1.2-1.7-6.80.00.00.00.00.00.00.00.0

Proceeds From Issuance Of Long Term Debt

Repayments Of Long Term Debt

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value100501001991004001507575404210814843000000039655610711312214660262121115100
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Repayments Of Long Term Debt

Debt Instrument Interest Rate Stated Percentage

Effective Income Tax Rate Continuing Operations

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number

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

Share Based Compensation

us-gaap:ShareBasedCompensation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value17233126252018262523332527272425312423272610111111111111121310108
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

Deferred Tax Assets Net

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-31
Value323124251718182521191416191817242427282816212525253237383640555552545755535972
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions

Cash And Cash Equivalents Period Increase Decrease

lh:AllowanceforCreditLossWriteOff



Period End2020-03-31
Value500000.0
Percentage of AllowanceforCreditLossWriteOff100.0

us-gaap:BalanceSheetLocation

lh:UnbilledContractsReceivable



Period End2020-03-31
Value100000.0
Percentage of AllowanceforCreditLossWriteOff20.0

us-gaap:AccountsReceivable



Period End2020-03-31
Value400000.0
Percentage of AllowanceforCreditLossWriteOff80.0

us-gaap:NotesReceivable



Period End2020-03-31
Value0.0
Percentage of AllowanceforCreditLossWriteOff0.0

lh:ConversionOfZeroCouponConvertibleDebt



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-31
Value0-507000000-18311411300333
Percentage of ConversionOfZeroCouponConvertibleDebt0.0100.0100.0100.00.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0

lh:CurrentExpectedCreditLossesOpeningBalanceSheetImpactonRetainedEarnings



Period End2020-03-31
Value7
Percentage of CurrentExpectedCreditLossesOpeningBalanceSheetImpactonRetainedEarnings100.0

us-gaap:BalanceSheetLocation

lh:UnbilledContractsReceivable



Period End2020-03-31
Value200000.0
Percentage of CurrentExpectedCreditLossesOpeningBalanceSheetImpactonRetainedEarnings2.9

us-gaap:AccountsReceivable



Period End2020-03-31
Value1
Percentage of CurrentExpectedCreditLossesOpeningBalanceSheetImpactonRetainedEarnings25.7

us-gaap:NotesReceivable



Period End2020-03-31
Value5
Percentage of CurrentExpectedCreditLossesOpeningBalanceSheetImpactonRetainedEarnings71.4

lh:DefinedContributionPlanTotalExpense



Period End2020-03-312019-03-31
Value1316
Percentage of DefinedContributionPlanTotalExpense100.0100.0

lh:DepreciationAndAmortizationOfLeasedAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-312016-03-312015-03-312014-03-31
Value5750503261311000306311269157
Percentage of DepreciationAndAmortizationOfLeasedAssets100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0

lh:IncomeLossFromContinuingOperationsBeforeIncomeTaxesAndMinorityInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-26729228727025421449931224128928128527927626331325618525126632187230250241226256269220207213216260223
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesAndMinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lh:IncomeLossfromContinuingOperationsBeforeIncomeTaxesandNoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-30
Value-26728727025449931224128128527926331325625026430219232187230250
Percentage of IncomeLossfromContinuingOperationsBeforeIncomeTaxesandNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lh:IncreaseDecreaseinUnbilledContractReceivable



Period End2020-03-312019-03-31
Value126
Percentage of IncreaseDecreaseinUnbilledContractReceivable100.0100.0

lh:Intercompanyrevenueelimination



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-03-31
Value226655-15210-200000000000
Percentage of Intercompanyrevenueelimination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0

lh:InterestPaidInCash



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value803292249919889196647230713175327139723914431837182811102613131013
Percentage of InterestPaidInCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lh:Issuanceofcommonstockunderemployeeplans



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-30
Value26020191-2025025200181530253347421617
Percentage of Issuanceofcommonstockunderemployeeplans100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-30
Value26259242414283342626281130253347421617
Percentage of Issuanceofcommonstockunderemployeeplans100.08366.744.4127.32218.2-72.6113.611266.717.3130.05340.0159.478.8100.0100.099.7100.0100.0100.0100.0

us-gaap:CommonStock



Period End2020-03-312019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-30
Value0.00.00.00.00.00.00.00.0100000.00.0100000.00.00.00.0100000.00.00.00.00.0
Percentage of Issuanceofcommonstockunderemployeeplans0.00.00.00.0-0.00.00.00.00.50.00.60.00.00.00.30.00.00.00.0

us-gaap:RetirementPlanType

lh:NetDefinedBenefitPlanAmortizationAndDeferral

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value232223222222
Percentage of NetDefinedBenefitPlanAmortizationAndDeferral100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lh:NetProceedsFromIssuanceOfStockToEmployees



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value265259241241428833427326281193325301628268643871818
Percentage of NetProceedsFromIssuanceOfStockToEmployees100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lh:NetRestructuringAndOtherSpecialCharges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value2561413201110121462139392261954261419252736743-3241827309
Percentage of NetRestructuringAndOtherSpecialCharges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

lh:NetRestructuringCharges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-03-31
Value256141320111012146213939226195426141925277-31411133
Percentage of NetRestructuringCharges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

lh:CovanceDrugDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value172710745610316312315716
Percentage of NetRestructuringCharges68.137.152.877.936.437.159.054.974.857.175.981.161.537.869.7106.183.3

lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value836313745325716603
Percentage of NetRestructuringCharges31.962.947.222.163.662.941.045.125.242.924.118.938.562.230.3-6.116.7

lh:OtherFinancingCashFlows



Period End2020-03-312019-03-31
Value78
Percentage of OtherFinancingCashFlows100.0100.0

lh:PercentofRevenueContributed



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.00.01.01.01.00.01.01.01.00.01.01.01.0
Percentage of PercentofRevenueContributed100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0

us-gaap:ContractWithCustomerSalesChannel

lh:MedicareandMedicaid



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.080.00.080.080.090.00.090.10.090.00.10.10.1
Percentage of PercentofRevenueContributed8.00.08.08.09.00.09.010.09.00.010.010.010.0

us-gaap:ContractWithCustomerSalesChannel, us-gaap:StatementBusinessSegments

lh:Biopharmaceuticalandmedicaldevicecompanies, lh:CovanceDrugDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.40.0100000000000000090.40.390.380.00.380.370.380.00.320.320.32
Percentage of PercentofRevenueContributed40.00.040.039.038.00.038.037.038.00.032.032.032.0

lh:Client, lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value0.170.00.170.170.170.00.180.190.180.20.21
Percentage of PercentofRevenueContributed17.00.017.017.017.00.018.019.018.020.021.0

lh:Thirdparty, lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value0.28-0.0100000000000000090.270.280.280.0100000000000000090.270.250.250.290.27
Percentage of PercentofRevenueContributed28.00.027.028.028.00.027.025.025.029.027.0

us-gaap:SelfPay, lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value0.070.00.080.080.08-0.0099999999999999950.080.090.10.090.1
Percentage of PercentofRevenueContributed7.00.08.08.08.00.08.09.010.09.010.0

us-gaap:StatementBusinessSegments

lh:CovanceDrugDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value0.40.0100000000000000090.40.390.380.00100000000000000090.380.370.3790.2930.280.2870.0140000000000000120.2950.3030.307-0.030999999999999972-0.0030000000000000027
Percentage of PercentofRevenueContributed40.00.040.039.038.00.038.037.037.929.328.028.70.00.00.00.00.00.0

lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.6-0.0100000000000000090.60.610.620.00.620.630.621-0.0100000000000000090.7070.720.7130.00100000000000000090.7050.6970.693
Percentage of PercentofRevenueContributed60.00.060.061.062.00.062.063.062.10.070.772.071.30.00.00.00.0

us-gaap:StatementGeographical

country:CA



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.030.00.030.030.030.00.030.030.030.00.030.030.03
Percentage of PercentofRevenueContributed3.00.03.03.03.00.03.03.03.00.03.03.03.0

country:CH



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.050.00.040.050.050.00.040.050.050.00.040.050.05
Percentage of PercentofRevenueContributed5.00.04.05.05.00.04.05.05.00.04.05.05.0

country:GB



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.050.00.050.040.040.0100000000000000020.030.050.040.00.030.040.03
Percentage of PercentofRevenueContributed5.00.05.04.04.00.03.05.04.00.03.04.03.0

country:US



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.770.00.780.780.78-0.0100000000000000090.830.760.780.00.80.790.79
Percentage of PercentofRevenueContributed77.00.078.078.078.00.083.076.078.00.080.079.079.0

lh:Othercountries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.070.00.070.070.070.00.050.070.070.00.070.060.06
Percentage of PercentofRevenueContributed7.00.07.07.07.00.05.07.07.00.07.06.06.0

srt:Europe



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.030.00.030.030.030.00.020.040.040.00.030.03
Percentage of PercentofRevenueContributed3.00.03.03.03.00.02.04.04.00.03.03.0

us-gaap:StatementGeographical, us-gaap:ContractWithCustomerSalesChannel, us-gaap:StatementBusinessSegments

country:CA, lh:Client, lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.010.00.010.010.010.00.010.010.010.00.010.01
Percentage of PercentofRevenueContributed1.00.01.01.01.00.01.01.01.00.01.01.0

country:CA, lh:Thirdparty, lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.020.00.020.020.020.00.020.020.020.00.020.02
Percentage of PercentofRevenueContributed2.00.02.02.02.00.02.02.02.00.02.02.0

country:CH, lh:Biopharmaceuticalandmedicaldevicecompanies, lh:CovanceDrugDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.050.00.040.050.050.00.040.050.050.00.040.05
Percentage of PercentofRevenueContributed5.00.04.05.05.00.04.05.05.00.04.05.0

country:GB, lh:Biopharmaceuticalandmedicaldevicecompanies, lh:CovanceDrugDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.050.00.050.040.040.0100000000000000020.030.050.030.00.030.03
Percentage of PercentofRevenueContributed5.00.05.04.04.00.03.05.03.00.03.03.0

country:GB, lh:Client, lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.00.00.00.00.00.00.00.00.010.00.00.01
Percentage of PercentofRevenueContributed0.00.00.00.00.00.00.00.01.00.00.01.0

country:US, lh:Biopharmaceuticalandmedicaldevicecompanies, lh:CovanceDrugDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.20.0099999999999999810.210.20.19-0.0100000000000000090.240.160.190.00.150.15
Percentage of PercentofRevenueContributed20.00.021.020.019.00.024.016.019.00.015.015.0

country:US, lh:Client, lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.160.00.160.160.160.00.170.180.160.00.190.19
Percentage of PercentofRevenueContributed16.00.016.016.016.00.017.018.016.00.019.019.0

country:US, lh:MedicareandMedicaid, lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.080.00.080.080.090.00.090.10.090.00.10.1
Percentage of PercentofRevenueContributed8.00.08.08.09.00.09.010.09.00.010.010.0

country:US, lh:Thirdparty, lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.26-0.0100000000000000090.250.260.260.0100000000000000090.250.230.250.0100000000000000090.270.25
Percentage of PercentofRevenueContributed26.00.025.026.026.00.025.023.025.00.027.025.0

country:US, us-gaap:SelfPay, lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.070.00.080.080.08-0.0099999999999999950.080.090.08-0.0099999999999999950.090.1
Percentage of PercentofRevenueContributed7.00.08.08.08.00.08.09.08.00.09.010.0

lh:Othercountries, lh:Biopharmaceuticalandmedicaldevicecompanies, lh:CovanceDrugDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.070.00.070.070.070.00.050.070.070.00.070.06
Percentage of PercentofRevenueContributed7.00.07.07.07.00.05.07.07.00.07.06.0

srt:Europe, lh:Biopharmaceuticalandmedicaldevicecompanies, lh:CovanceDrugDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.030.00.030.030.030.00.020.040.040.00.030.03
Percentage of PercentofRevenueContributed3.00.03.03.03.00.02.04.04.00.03.03.0

us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments

country:CA, lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.030.00.030.030.030.00.030.030.030.00.030.03
Percentage of PercentofRevenueContributed3.00.03.03.03.00.03.03.03.00.03.03.0

country:GB, lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.00.00.00.00.00.00.00.00.010.00.00.01
Percentage of PercentofRevenueContributed0.00.00.00.00.00.00.00.01.00.00.01.0

country:US, lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.57-0.0100000000000000090.570.580.590.00.590.60.580.00.650.64
Percentage of PercentofRevenueContributed57.00.057.058.059.00.059.060.058.00.065.064.0

lh:RestructuringImpairment



Period End2020-03-31
Value4
Percentage of RestructuringImpairment100.0

us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments

us-gaap:EmployeeSeverance, lh:CovanceDrugDevelopment



Period End2020-03-31
Value0.0
Percentage of RestructuringImpairment0.0

us-gaap:EmployeeSeverance, lh:LabCorpDiagnostics



Period End2020-03-31
Value0.0
Percentage of RestructuringImpairment0.0

us-gaap:FacilityClosing, lh:CovanceDrugDevelopment



Period End2020-03-31
Value4
Percentage of RestructuringImpairment100.0

us-gaap:FacilityClosing, lh:LabCorpDiagnostics



Period End2020-03-31
Value0.0
Percentage of RestructuringImpairment0.0

lh:RestructuringReserveSettledWithCashAndOtherAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-31
Value257121615161512161428361823710142653194519-892-7-155
Percentage of RestructuringReserveSettledWithCashAndOtherAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments

us-gaap:EmployeeSeverance, lh:CovanceDrugDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value44244853771113913578
Percentage of RestructuringReserveSettledWithCashAndOtherAdjustment17.253.920.825.726.849.734.032.245.647.040.836.449.258.067.168.060.1

us-gaap:EmployeeSeverance, lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0132104410-329-3-5-54212
Percentage of RestructuringReserveSettledWithCashAndOtherAdjustment1.222.428.316.269.426.726.783.5-18.8200.0-11.3-14.2-28.018.228.914.614.0

us-gaap:FacilityClosing, lh:CovanceDrugDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1219-2-81-2249-3-1-9-16-3-130-47
Percentage of RestructuringReserveSettledWithCashAndOtherAdjustment47.7257.9-23.3-51.58.9-139.831.377.7-23.1-11.4-33.7-44.4-18.0-59.310.5-40.849.7

us-gaap:FacilityClosing, lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value8231221223410-81-210
Percentage of RestructuringReserveSettledWithCashAndOtherAdjustment34.028.927.56.612.713.08.017.412.525.514.24.94.8-35.514.5-23.375.5

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value1731-199252018-7525233325272771542423272610111111111111121310108
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value173126252018262523332527272425312423272610111111111111121310108
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0-13.3100.0100.0100.0-34.9100.0100.0100.0100.0100.0100.034.0437.3691.3100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfDeferredSalesCommissions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value5555444443333
Percentage of AmortizationOfDeferredSalesCommissions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfIntangibleAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value62646160575654586262545147484145443847463115182221202019212021212121181717
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value1000000000000000000003321110
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.0100.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetImpairmentCharges



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value43700003020815000002400140000
Percentage of AssetImpairmentCharges100.00.00.00.00.0100.00.0100.00.0100.0100.00.00.00.00.00.0100.00.00.0100.00.00.00.00.0

us-gaap:BusinessExitCosts1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-31
Value15281033611012413941762816110441
Percentage of BusinessExitCosts1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedContractCostAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3221110100000
Percentage of CapitalizedContractCostAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect



Period End2020-03-312019-03-31
Value-13-78
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0

us-gaap:ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value9674839010-1222
Percentage of ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value558-11733-23036-5254-231849-382518-17-11-221731-2-111010208-18-1-5-610
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredRevenueRevenueRecognized1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-06-302017-03-31
Value12117715810359964714655
Percentage of DeferredRevenueRevenueRecognized1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value3333344444444444
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value2333333333333333
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value33333103333333333
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value1111111111111111
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessAcquisition

us-gaap:DefinedContributionPlanCostRecognized

lh:Covance



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value2318171916161814131512121311114
Percentage of DefinedContributionPlanCostRecognized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-88-5-10-2-1-1241783-15-1084-13-2427-25-3-5-2-1-41-1010-11
Percentage of EffectOfExchangeRateOnCashAndCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss

us-gaap:CurrencySwap



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value19-1618-71113-16-240
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateSwap



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value10042-36-100
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss9.03.02.1-55.121.7-26.7-37.741.2-300.0

us-gaap:StatementBusinessSegments

us-gaap:GoodwillAndIntangibleAssetImpairment

lh:CovanceDrugDevelopment



Period End2020-03-31
Value426
Percentage of GoodwillAndIntangibleAssetImpairment100.0

lh:LabCorpDiagnostics



Period End2020-03-31
Value11
Percentage of GoodwillAndIntangibleAssetImpairment2.6

us-gaap:GoodwillImpairmentLoss



Period End2020-03-31
Value422
Percentage of GoodwillImpairmentLoss100.0

us-gaap:StatementBusinessSegments

lh:CovanceDrugDevelopment



Period End2020-03-31
Value418
Percentage of GoodwillImpairmentLoss99.1

lh:LabCorpDiagnostics



Period End2020-03-31
Value3
Percentage of GoodwillImpairmentLoss0.9

us-gaap:GoodwillTranslationAndPurchaseAccountingAdjustments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-31
Value-5495-7723-12-31-69371275619-105-9-611-2-60-4-2-22-20-1-4-10
Percentage of GoodwillTranslationAndPurchaseAccountingAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

lh:CovanceDrugDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-4793-7603-9-30-6839676020-167-7-1322200000000
Percentage of GoodwillTranslationAndPurchaseAccountingAdjustments87.898.398.715.094.374.697.497.7104.853.792.3107.5105.1158.079.6213.72018.25.0-0.014.3-0.0-0.0-0.00.0-0.0

lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-61-110-30-1-150-4-161-170-21-1-60-4
Percentage of GoodwillTranslationAndPurchaseAccountingAdjustments12.21.71.385.05.725.42.62.3-4.846.37.7-7.5-5.1-58.020.4-113.7-1918.295.0100.085.7100.0

us-gaap:ImpairmentOfInvestments



Period End2020-03-31
Value20
Percentage of ImpairmentOfInvestments100.0

us-gaap:IncomeStatementLocation

lh:EquityMethodIncomeLossNetDomain



Period End2020-03-31
Value7
Percentage of ImpairmentOfInvestments35.1

us-gaap:OtherNonoperatingIncomeExpense



Period End2020-03-31
Value13
Percentage of ImpairmentOfInvestments64.9

us-gaap:IncomeLossFromEquityMethodInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-6122333321342221122223333344584221443
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-561580-80-2812311-31-595658-1-2847-2-20-3455915-48-591-2710-3216-14-42-1823-14
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsReceivable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-46-8053090-5821-6653-8047727-239-6105-18361340-2811839755012410-68861-38
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-03-31
Value-14933-7-22-136-11155-33-8339-4328-39-3515-19-4781384-145-10
Percentage of IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDeferredRevenue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-11394-10560-102-172698-786-9121930-11140000
Percentage of IncreaseDecreaseInDeferredRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value34810-8-71712-633-33-121122-2522-38-8-2271422-12-12-7-9-35816-2265
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value0000111111111111110111111111000
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentIncomeNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value2421032000000000000000000100000000000
Percentage of InvestmentIncomeNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseImpairmentLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value1111291
Percentage of OperatingLeaseImpairmentLoss100.0100.0100.0100.0100.0

us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments

us-gaap:FacilityClosing, lh:CovanceDrugDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value60570
Percentage of OperatingLeaseImpairmentLoss58.63.6178.682.40.0

us-gaap:FacilityClosing, lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value410-211
Percentage of OperatingLeaseImpairmentLoss41.496.4-78.617.6100.0

us-gaap:OtherComprehensiveIncomeLossBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-06-302012-03-31
Value-144123-892824-743-1184236215759-301-29-98138-131-10233-167-82-2921-3424-28-24-1723
Percentage of OtherComprehensiveIncomeLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-06-302012-03-31
Value-147149-922521-940-12139-145915759-261-27-95134-137-10232-168-40-4835-3622-31-27-1723
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-06-302012-03-31
Value-145129-902723-550-1255264114254-283-20-99109-118-6826-120-50-1813-2015-17-15-1014
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-31
Value-145-902723-550-1255264114254-283-20-99109-118-6831-120-50-1813-20-1514
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.099.5100.0100.0100.099.9119.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-226-3-2-2-20-2-3-2-17-2003912-3-600043-20-2-2-33-2-3-3
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value0-6000-1847-10-320145-18-8129-12-347-47-31-118-139-11-812-69-24299-119
Percentage of OtherComprehensiveIncomeLossTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingActivitiesCashFlowStatement



Period End2020-03-312019-03-31
Value437
Percentage of OtherOperatingActivitiesCashFlowStatement100.0100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value220201912025
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value023149656473807908312314161511512525093438623622940065150129154414232
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired0.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessAcquisition

lh:Otheracquirees



Period End2020-03-312019-12-312019-09-30
Value4723145
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired0.0100.997.5

us-gaap:PaymentsToAcquireEquityMethodInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-31
Value76512387513752102720613747120
Percentage of PaymentsToAcquireEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ProceedsFromLongTermLinesOfCredit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value15122532861331854165229685745202291390000006000003000085653065
Percentage of ProceedsFromLongTermLinesOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.0100.00.00.00.00.0100.00.00.00.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfEquityMethodInvestments



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-03-31
Value06300000000000012000831
Percentage of ProceedsFromSaleOfEquityMethodInvestments100.0100.0100.0100.00.00.00.00.00.00.00.00.00.0100.00.0100.00.00.00.0100.0100.0

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value71103049004000621820000000000020101
Percentage of ProceedsFromSaleOfPropertyPlantAndEquipment100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLinesOfCredit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value1518825113354180214883
Percentage of RepaymentsOfLinesOfCredit100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringCharges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value8-1114181310131492239410239215326141926279
Percentage of RestructuringCharges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments

us-gaap:EmployeeSeverance, lh:CovanceDrugDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value242164378621501731
Percentage of RestructuringCharges28.4-313.321.632.637.536.133.054.258.162.611.938.318.617.431.035.26.0

us-gaap:EmployeeSeverance, lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value22329534222415613
Percentage of RestructuringCharges23.9-133.329.343.553.841.430.335.918.227.38.812.541.954.129.714.314.9

us-gaap:FacilityClosing, lh:CovanceDrugDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value20010030201416129416
Percentage of RestructuringCharges30.7-13.30.932.61.14.529.40.816.93.064.642.639.521.138.845.178.6

us-gaap:FacilityClosing, lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1-4501201103200000
Percentage of RestructuringCharges17.0320.048.3-8.77.618.07.39.26.87.114.66.60.07.30.45.50.5

us-gaap:RestructuringReserveAccrualAdjustment1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-09-30
Value0300010003100100
Percentage of RestructuringReserveAccrualAdjustment1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments

us-gaap:EmployeeSeverance, lh:CovanceDrugDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0-20000000-200000
Percentage of RestructuringReserveAccrualAdjustment1-200.0-58.80.0100.0-80.0-23.5-33.3-100.00.0-72.2-80.00.0-25.0-36.4-25.0

us-gaap:EmployeeSeverance, lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value100000.0100000.00.0200000.0-100000.0400000.00.00.00.0700000.0100000.00.0300000.00.00.0
Percentage of RestructuringReserveAccrualAdjustment1-33.32.90.0200.020.023.50.00.00.019.410.00.075.00.00.0

us-gaap:FacilityClosing, lh:CovanceDrugDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0.0-1000000.0-100000.00.00.0-700000.0-600000.00.00.0-300000.0-100000.00.00.0-200000.0-300000.0
Percentage of RestructuringReserveAccrualAdjustment1-0.0-29.4-50.00.0-0.0-41.2-66.70.00.0-8.3-10.00.00.0-18.2-75.0

us-gaap:FacilityClosing, lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value200000.0300000.0100000.00.00.0200000.00.00.0500000.00.00.0100000.00.0500000.00.0
Percentage of RestructuringReserveAccrualAdjustment1-66.78.850.00.0-0.011.80.00.0100.00.00.0100.00.045.50.0

us-gaap:SeveranceCosts1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-31
Value56531610611118419271444-22463042227
Percentage of SeveranceCosts1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures



Period End2020-03-312019-03-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value2219250033121010270024220-3-200-2
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.00.0100.0100.00.00.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-03-312014-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value2200000000
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures100.00.00.00.0-0.0-0.00.00.0-0.0

us-gaap:CommonStock



Period End2020-03-312019-09-302019-03-312014-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value0.0300000.00.00.00.00.00.00.00.00.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures0.00.00.00.00.0-0.0-0.00.00.0-0.0

us-gaap:TreasuryStock



Period End2020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value0201911202500252010181510270024220-3-200-2
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures0.00.0100.00.00.00.0100.0100.0100.076.1163.0100.0100.00.00.0100.0100.0100.0100.00.00.0100.0100.0100.0100.00.0100.0100.00.00.0100.0

us-gaap:StockRepurchasedDuringPeriodValue



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value10010019910040015075754042108148000396556107113122-152-60-265-115-116-105
Percentage of StockRepurchasedDuringPeriodValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-49-99-100999-149-75-75635-42-107-147-208652592018000196159294543-93-60-95-17-32-47
Percentage of StockRepurchasedDuringPeriodValue-49.6-99.9-99.9249.9-99.9-100.0-100.01589.5-100.0-99.9-99.90.00.00.00.00.00.00.050.693.0105.027.840.035.261.2100.035.815.427.645.1

us-gaap:CommonStock



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value000000000000-120012000000000000000
Percentage of StockRepurchasedDuringPeriodValue0.0-0.1-0.1-0.10.1-0.10.00.01.00.0-0.1-0.10.00.00.00.00.00.00.00.50.00.00.10.10.10.1-0.00.10.20.20.1

us-gaap:RetainedEarnings



Period End2020-03-312019-03-312017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-5005152-47711792044387000194-2776879-580-170-97-83-57
Percentage of StockRepurchasedDuringPeriodValue-50.40.03481.10.00.00.00.00.00.00.048.87.0-5.072.159.964.838.6-0.064.184.572.254.8

lh:A2.30seniornotesdue2024



Period End2020-03-312019-12-312018-12-31
Value4004000
Percentage of A2.30seniornotesdue2024100.0100.00.0

lh:A2.95seniornotesdue2029



Period End2020-03-312019-12-312018-12-31
Value6506500
Percentage of A2.95seniornotesdue2029100.0100.00.0

lh:A4.625Seniornotesdue2020



Period End2020-03-312019-12-312019-03-312018-12-312017-12-312016-12-31
Value415413599597604614
Percentage of A4.625Seniornotesdue2020100.0100.0100.0100.0100.0100.0

lh:AllowanceforCreditLoss



Period End2020-03-312019-12-31
Value4121
Percentage of AllowanceforCreditLoss100.0100.0

us-gaap:Range, us-gaap:CreditFacility, us-gaap:SubsequentEventType

lh:DebttoEBITDALeverageRatioNextThreeQuarters

srt:Maximum, lh:TermLoanandRevolvingCreditFacility, us-gaap:SubsequentEvent



Period End2020-05-07
Value5.0
Percentage of DebttoEBITDALeverageRatioNextThreeQuarters100.0

us-gaap:CreditFacility, us-gaap:SubsequentEventType

lh:DebttoEBITDALeverageRatioQuarterEnding1YearFromPresent

lh:TermLoanandRevolvingCreditFacility, us-gaap:SubsequentEvent



Period End2020-05-07
Value4.5
Percentage of DebttoEBITDALeverageRatioQuarterEnding1YearFromPresent100.0

lh:DeferredIncomeTaxesAndOtherTaxLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value94394296994895994089991499194813981193121212061227131012931245530563546558525522502569586617602
Percentage of DeferredIncomeTaxesAndOtherTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lh:FairValueLiabilitiesMeasuredOnRecurringBasisDeferredCompensationLiability



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value667672747164716865646259565453504846444543434140383626
Percentage of FairValueLiabilitiesMeasuredOnRecurringBasisDeferredCompensationLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value000000000000000000444543041403800
Percentage of FairValueLiabilitiesMeasuredOnRecurringBasisDeferredCompensationLiability0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.0100.0100.00.0100.0100.0100.00.00.0

lh:FairValueLiabilitiesMeasuredOnRecurringBasisNoncontrollingInterestPuts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value14151515151515151616161515151515151415161617181918192020202020202020160174173168
Percentage of FairValueLiabilitiesMeasuredOnRecurringBasisNoncontrollingInterestPuts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value14151515151515151616161515151515151415161617191918192020202020202020168
Percentage of FairValueLiabilitiesMeasuredOnRecurringBasisNoncontrollingInterestPuts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0104.9100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lh:Longtermdebtissuancecosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value414235373740424346485039414344474951
Percentage of Longtermdebtissuancecosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lh:NoncontrollingInterestMezzanineEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value18201920191920202020261515151515151415161617181918192020202020202020192120
Percentage of NoncontrollingInterestMezzanineEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lh:NoteReceivableAllowanceforCreditLoss



Period End2020-03-312019-12-31
Value100
Percentage of NoteReceivableAllowanceforCreditLoss100.00.0

us-gaap:StatementBusinessSegments

lh:PercentageFairValueofGoodwillExceededCarryingValue

lh:CovanceDrugDevelopment



Period End2020-03-31
Value0.1
Percentage of PercentageFairValueofGoodwillExceededCarryingValue100.0

lh:LabCorpDiagnostics



Period End2020-03-31
Value0.1
Percentage of PercentageFairValueofGoodwillExceededCarryingValue100.0

us-gaap:CreditFacility, us-gaap:SubsequentEventType

lh:RevolvingCreditFacilityAccrueInterestPerAnnumBaseRatePlusPercentage

us-gaap:RevolvingCreditFacility, us-gaap:SubsequentEvent



Period End2020-05-07
Value0.0025
Percentage of RevolvingCreditFacilityAccrueInterestPerAnnumBaseRatePlusPercentage100.0

us-gaap:CreditFacility, us-gaap:SubsequentEventType

lh:RevolvingCreditFacilityAccrueInterestperAnnumatLiborPlusMarginPercentage

us-gaap:RevolvingCreditFacility, us-gaap:SubsequentEvent



Period End2020-05-07
Value0.0125
Percentage of RevolvingCreditFacilityAccrueInterestperAnnumatLiborPlusMarginPercentage100.0

us-gaap:CreditFacility, us-gaap:SubsequentEventType

lh:RevolvingCreditFacilityFeePercentageRequiredtoPayonOutstandingCommitments

us-gaap:RevolvingCreditFacility, us-gaap:SubsequentEvent



Period End2020-05-07
Value0.0025
Percentage of RevolvingCreditFacilityFeePercentageRequiredtoPayonOutstandingCommitments100.0

lh:SeniorNotesFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value6007528157635658550853185904590859536078608153575240525461536127622060706358635665862949295629762907221922212293272026831645162116241616159415681549
Percentage of SeniorNotesFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lh:Shorttermdebtissuancecosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value000110001110113001
Percentage of Shorttermdebtissuancecosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CreditFacility, us-gaap:SubsequentEventType

lh:TermLoanAccrueInterestPerAnnumBaseRatePlusPercentage

lh:A2019TermLoan, us-gaap:SubsequentEvent



Period End2020-05-07
Value0.00175
Percentage of TermLoanAccrueInterestPerAnnumBaseRatePlusPercentage100.0

us-gaap:CreditFacility, us-gaap:SubsequentEventType

lh:TermLoanAccrueInterestperAnnumatLiborPlusMarginPercentage

lh:A2019TermLoan, us-gaap:SubsequentEvent



Period End2020-05-07
Value0.01175
Percentage of TermLoanAccrueInterestperAnnumatLiborPlusMarginPercentage100.0

lh:UnbilledServicesAllowanceforCreditLoss



Period End2020-03-312019-12-31
Value22
Percentage of UnbilledServicesAllowanceforCreditLoss100.0100.0

us-gaap:StatementBusinessSegments

lh:ValueofReportingUnitsGoodwillFairValueExceedsCarryingValue

lh:CovanceDrugDevelopment



Period End2020-03-31
Value631
Percentage of ValueofReportingUnitsGoodwillFairValueExceedsCarryingValue100.0

lh:LabCorpDiagnostics



Period End2020-03-31
Value81.5
Percentage of ValueofReportingUnitsGoodwillFairValueExceedsCarryingValue0.0

us-gaap:AccruedLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value828942830820797870901739749632610617564593589565584633583567488341365362358310308281346311386349407404404444435352
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedSalesCommissionCurrentAndNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value30282727262422232424
Percentage of AccruedSalesCommissionCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value-8587-67-69-7173-87-89-9193-109-110-110110-67-73-7274-77-77-7878-51-64-65-67-88-89-91-93-98-62-57-77
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value-432-285-435-342-368-389-320-317-190-242-233-274-416-470-310-283-186-212-90-22-53689312210112314012614516214315212568
Percentage of AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdditionalPaidInCapitalCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value02647911401145118281934196919891998197220512131213020882022197419371877182300000000000000721753
Percentage of AdditionalPaidInCapitalCommonStock0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable



Period End2020-03-312019-12-312018-12-31
Value281915
Percentage of AllowanceForDoubtfulAccountsReceivable100.0100.0100.0

us-gaap:AmountOfDeferredCostsRelatedToLongTermContracts



Period End2020-03-312019-12-31
Value4443
Percentage of AmountOfDeferredCostsRelatedToLongTermContracts100.0100.0

us-gaap:BalanceSheetLocation, us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets

us-gaap:Assets, lh:Envigo



Period End2020-03-312019-12-312019-09-30
Value242428
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets100.0100.0100.0

us-gaap:BusinessAcquisition

lh:Envigo



Period End2020-03-312019-12-312019-09-302019-06-03
Value734734730759
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets3011.53011.52545.30.0

us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCapitalLeaseObligation

lh:Envigo



Period End2020-03-312019-12-312019-09-302019-06-03
Value00015
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCapitalLeaseObligation0.00.00.0100.0

us-gaap:BalanceSheetLocation, us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents

us-gaap:CashAndCashEquivalents, lh:Envigo



Period End2020-03-312019-12-312019-09-30
Value333
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents100.0100.0100.0

us-gaap:BusinessAcquisition

lh:Envigo



Period End2020-03-312019-12-312019-09-302019-06-03
Value11111115
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents308.1308.1287.20.0

us-gaap:BalanceSheetLocation, us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther

us-gaap:OtherCurrentAssets, lh:Envigo



Period End2020-03-312019-12-312019-09-30
Value300000.0300000.00.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther100.0100.00.0

us-gaap:BusinessAcquisition

lh:Envigo



Period End2020-03-312019-12-312019-09-302019-06-03
Value26262626
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther8733.38733.30.00.0

us-gaap:BalanceSheetLocation, us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets

us-gaap:PrepaidExpensesAndOtherCurrentAssets, lh:Envigo



Period End2020-03-312019-12-312019-09-30
Value650
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets100.0100.00.0

us-gaap:BusinessAcquisition

lh:Envigo



Period End2020-03-312019-12-312019-09-302019-06-03
Value9933
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets155.6159.30.00.0

us-gaap:BalanceSheetLocation, us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables

us-gaap:AccountsReceivable, lh:Envigo



Period End2020-03-312019-12-312019-09-30
Value441
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables100.0100.0100.0

us-gaap:BusinessAcquisition

lh:Envigo



Period End2020-03-312019-12-312019-09-302019-06-03
Value11121516
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables258.7266.71275.00.0

us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable

lh:Envigo



Period End2020-03-312019-12-312019-09-302019-06-03
Value15151515
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable100.0100.0100.0100.0

us-gaap:BalanceSheetLocation, us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther

us-gaap:AccruedLiabilities, lh:Envigo



Period End2020-03-312019-12-312019-09-30
Value114
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther100.0100.0100.0

us-gaap:BusinessAcquisition

lh:Envigo



Period End2020-03-312019-12-312019-09-302019-06-03
Value1010711
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther673.3673.3176.20.0

us-gaap:BalanceSheetLocation, us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets

us-gaap:DeferredTaxAssetDomain, lh:Envigo



Period End2020-03-312019-09-30
Value119
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets100.0100.0

us-gaap:BusinessAcquisition

lh:Envigo



Period End2020-03-312019-12-312019-09-302019-06-03
Value14131625
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets121.70.0174.20.0

us-gaap:BalanceSheetLocation, us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles

us-gaap:CustomerRelationships, lh:Envigo



Period End2020-03-312019-12-312019-09-30
Value151518
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles100.0100.0100.0

us-gaap:BusinessAcquisition

lh:Envigo



Period End2020-03-312019-12-312019-09-302019-06-03
Value141140144125
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles942.7938.7772.70.0

us-gaap:BalanceSheetLocation, us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities

us-gaap:Liability, lh:Envigo



Period End2020-03-312019-12-312019-09-30
Value242428
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities100.0100.0100.0

us-gaap:BusinessAcquisition

lh:Envigo



Period End2020-03-312019-12-312019-09-302019-06-03
Value133133129158
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities548.4548.4451.20.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet



Period End2020-03-312019-12-312019-09-302017-07-31
Value0001224
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet0.00.00.0100.0

us-gaap:BalanceSheetLocation, us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities

us-gaap:OtherNoncurrentLiabilities, lh:Envigo



Period End2020-03-312019-12-312019-09-30
Value779
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities100.0100.0100.0

us-gaap:BusinessAcquisition

lh:Envigo



Period End2020-03-312019-12-312019-09-302019-06-03
Value58585766
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities761.0761.0612.90.0

us-gaap:BalanceSheetLocation, us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipment, lh:Envigo



Period End2020-03-312019-12-312019-09-30
Value252815
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment100.0100.0100.0

us-gaap:BusinessAcquisition

lh:Envigo



Period End2020-03-312019-12-312019-09-302019-06-03
Value1241278499
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment484.1452.7560.70.0

us-gaap:BalanceSheetLocation, us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet

us-gaap:Goodwill, lh:Envigo



Period End2020-03-312019-12-312019-09-30
Value515218
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet100.0100.0100.0

us-gaap:BusinessAcquisition

lh:Envigo



Period End2020-03-312019-12-312019-09-302019-06-03
Value380379414432
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet740.9717.02301.10.0

us-gaap:CapitalizedContractCostNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value131415141312121081
Percentage of CapitalizedContractCostNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashSurrenderValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value688075757163696763646058555352494545434544414036353530
Percentage of CashSurrenderValueFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value688075757163696763646058555352494545434544414036353530
Percentage of CashSurrenderValueFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContingentConsiderationClassifiedAsEquityFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value6762018181616161616161616
Percentage of ContingentConsiderationClassifiedAsEquityFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value6762018181616161616161616
Percentage of ContingentConsiderationClassifiedAsEquityFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerAssetGross



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value480483479491425396322354343318
Percentage of ContractWithCustomerAssetGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiability



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value430449400402362354286389412377
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxesAndOtherAssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value6815111111122221222
Percentage of DeferredIncomeTaxesAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredRevenueCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value4324514034043643562893934183323131771841761691751661461411421530
Percentage of DeferredRevenueCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:DefinedBenefitPlanFundedStatusOfPlan



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value-93-93-87-104-119-11211981123138
Percentage of DefinedBenefitPlanFundedStatusOfPlan100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation

us-gaap:PensionAndOtherPostretirementPlansCosts



Period End2020-03-312019-12-312019-09-302018-12-31
Value88993739
Percentage of DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk

us-gaap:FairValueHedgeAssetsAtFairValue

us-gaap:CurrencySwap



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value2332010
Percentage of FairValueHedgeAssetsAtFairValue100.0100.0100.0100.00.0

us-gaap:InterestRateSwap



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value31430
Percentage of FairValueHedgeAssetsAtFairValue14.346.920.5308.30.0

us-gaap:FairValueHedgeLiabilitiesAtFairValue



Period End2020-03-312019-12-312019-03-312018-12-312017-12-31
Value31034
Percentage of FairValueHedgeLiabilitiesAtFairValue100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk

us-gaap:CurrencySwap



Period End2020-03-312019-12-312018-12-31
Value002
Percentage of FairValueHedgeLiabilitiesAtFairValue0.00.090.3

us-gaap:InterestRateSwap



Period End2020-03-312019-12-312019-03-312018-12-31
Value0003
Percentage of FairValueHedgeLiabilitiesAtFairValue0.00.0100.0100.0

us-gaap:FairValueHedgesAtFairValueNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value3143040-54142118381934181713110
Percentage of FairValueHedgesAtFairValueNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:FinanceLeaseLiabilityCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value888877
Percentage of FinanceLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value899192464851
Percentage of FinanceLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value190618511776172216611604155415121490142613641308125212031160111510701024953906857826804782760738718696661652654633612591-570-548-527-505
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lh:ScheduleOfOtherIntangibleAssetsByMajorClass

lh:PatentsLicensesAndTechnology



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value2382352292242172112072021951881811751681631581551501461071039895939087858381657697949188-85-82-78-75
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization12.512.712.913.013.113.213.413.413.113.213.313.413.513.613.713.914.114.311.311.411.511.611.611.611.511.611.711.710.011.714.914.914.914.914.914.914.915.0

us-gaap:CustomerRelationships



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value1371132912741233118811461106107510621014970930890855824791758724699665630606591576560545529514498483468454441426-412-399-384-370
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization71.971.871.771.671.671.571.271.171.371.171.171.171.171.171.070.970.870.873.473.473.573.573.573.673.773.873.873.975.474.171.671.872.072.272.472.773.073.2

us-gaap:NoncompeteAgreements



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value62605857555353515149474543424039383736343331302826252322201918171614-13-12-10-9
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization3.33.33.33.33.33.33.43.43.43.53.53.53.53.53.53.53.63.63.83.83.93.83.73.63.53.43.33.23.23.02.82.72.62.52.42.22.01.9

us-gaap:TradeNames



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value2282192092021951891831801781711621551481411351281221151091029591898785838078757370676461-58-55-52-50
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization12.011.911.811.811.811.811.811.912.012.011.911.911.811.811.711.511.411.311.511.411.211.111.111.211.211.211.211.211.511.210.810.610.510.410.310.110.010.0

us-gaap:UseRights



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value5554443332221110000000
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization0.30.30.30.30.30.30.20.20.20.20.20.20.10.10.10.10.10.10.00.00.00.0

us-gaap:ForeignCurrencyContractsLiabilityFairValueDisclosure



Period End2020-03-312018-03-31
Value232
Percentage of ForeignCurrencyContractsLiabilityFairValueDisclosure100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2



Period End2020-03-312018-03-31
Value232
Percentage of ForeignCurrencyContractsLiabilityFairValueDisclosure100.0100.0

us-gaap:IntangibleAssetsGrossExcludingGoodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value5811588557985738554655155545556257885767578049304722460446174473448043474514455144612301229323282298231023192320
Percentage of IntangibleAssetsGrossExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

lh:ScheduleOfOtherIntangibleAssetsByMajorClass

lh:PatentsLicensesAndTechnology



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value444453450452449447454452455457455403398395412318322308184184122125120120116116117117
Percentage of IntangibleAssetsGrossExcludingGoodwill7.67.77.87.98.18.18.28.17.97.97.98.28.48.68.97.17.27.14.14.12.75.55.35.25.15.05.15.1

us-gaap:CustomerRelationships



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value4414444143704307413541194115413843314297429735383367327532573213322031323290329132811361133713401338132713161296
Percentage of IntangibleAssetsGrossExcludingGoodwill76.075.575.475.174.674.774.274.474.874.574.371.871.371.170.671.871.972.072.972.373.559.258.357.658.257.456.855.9

us-gaap:LicensingAgreements



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value444480471476467457483475483495500481468464475482479451555591582635659691667694715743
Percentage of IntangibleAssetsGrossExcludingGoodwill7.68.28.18.38.48.38.78.58.48.68.79.89.910.110.310.810.710.412.313.013.127.628.729.729.130.130.832.0

us-gaap:NoncompeteAgreements



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value90908982787675757879778268535151495149494645444444413932
Percentage of IntangibleAssetsGrossExcludingGoodwill1.61.51.51.41.41.41.41.41.41.41.31.71.51.21.11.21.11.21.11.11.02.01.91.91.91.81.71.4

us-gaap:TradeNames



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value407408405407405404405410428426439413409406409400402399428428424133131131131131131131
Percentage of IntangibleAssetsGrossExcludingGoodwill7.06.97.07.17.37.37.37.47.47.47.68.48.78.88.99.09.09.29.59.49.55.85.75.65.75.75.75.7

us-gaap:UseRights



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value1010111110101010101010101010106555540
Percentage of IntangibleAssetsGrossExcludingGoodwill0.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.10.10.10.10.10.10.0

us-gaap:LongtermDebtType

us-gaap:LineOfCreditFacilityFairValueOfAmountOutstanding

lh:A2019TermLoan



Period End2020-03-312019-09-302019-06-30
Value375850850
Percentage of LineOfCreditFacilityFairValueOfAmountOutstanding100.0100.0100.0

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity



Period End2020-03-31
Value923
Percentage of LineOfCreditFacilityRemainingBorrowingCapacity100.0

us-gaap:NotesPayable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value67566778889787
Percentage of NotesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseLiabilityCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2022062022292630
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.00.0

us-gaap:OperatingLeaseLiabilityNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value6095965305865020
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.00.0

us-gaap:PrepaidExpenseCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value353373297298317309292286347421450379343321325297360340378387319157126115125106797567747868697978647195
Percentage of PrepaidExpenseCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringReserve



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value1313141215434853535463696782958084795231212224242525262725271922243138312517
Percentage of RestructuringReserve100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments

us-gaap:EmployeeSeverance, lh:CovanceDrugDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value45669610119811211928403842510
Percentage of RestructuringReserve31.841.046.654.861.114.921.022.418.115.218.530.529.134.341.947.449.965.00.0

us-gaap:EmployeeSeverance, lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value2000121211233751100
Percentage of RestructuringReserve16.73.72.02.47.64.82.73.82.63.13.34.95.59.16.11.41.50.11.8

us-gaap:FacilityClosing, lh:CovanceDrugDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value6442227293133343631302234242510
Percentage of RestructuringReserve50.835.131.819.813.463.361.159.363.063.357.344.845.827.635.930.829.81.40.0

us-gaap:FacilityClosing, lh:LabCorpDiagnostics



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value02222777810131313231516152621
Percentage of RestructuringReserve0.820.119.623.017.817.015.214.516.218.520.919.919.629.016.120.418.733.598.2

us-gaap:LongtermDebtType

us-gaap:SeniorLongTermNotes

lh:SeniorNotesDue2022



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312015-01-302014-12-312012-08-23
Value5005005005005005005005005005005005005005005005005005005005005005000500
Percentage of SeniorLongTermNotes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:DerivativeInstrumentRisk

us-gaap:ShorttermDebtFairValue

lh:SeniorNotesDue2020



Period End2020-03-312019-12-31
Value303301
Percentage of ShorttermDebtFairValue100.0100.0

us-gaap:UnbilledContractsReceivable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value4784814764884223943203513482352672472201902162031711561611631640
Percentage of UnbilledContractsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:StatementBusinessSegments

lh:CovanceDrugDevelopment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value758771809735716693665674690694
Percentage of UnbilledContractsReceivable158.7160.2169.7150.5169.4175.9208.0192.0197.9294.7

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value65510988787681091013131299988109910111091010111011131312
Percentage of UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Line plots across dimensions of each concept

us-gaap:Revenues us-gaap:StatementBusinessSegments


us-gaap:OperatingIncomeLoss us-gaap:StatementBusinessSegments


us-gaap:StockholdersEquity us-gaap:StatementEquityComponents


us-gaap:Goodwill us-gaap:StatementBusinessSegments


us-gaap:IntangibleAssetsNetExcludingGoodwill lh:ScheduleOfOtherIntangibleAssetsByMajorClass


us-gaap:LongTermDebtNoncurrent us-gaap:LongtermDebtType


us-gaap:StockholdersEquity us-gaap:StatementEquityComponents