NSC


Line plots across dimensions of each concept
Tables

Table of contents



us-gaap:CommonStockSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:Revenues

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:CostsAndExpenses

us-gaap:OperatingIncomeLoss

us-gaap:InterestExpense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaidNet

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

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:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:OtherAssetsCurrent

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:LongTermInvestments

us-gaap:OtherAssetsNoncurrent

us-gaap:LiabilitiesCurrent

us-gaap:AccountsPayableCurrent

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:TaxesPayableCurrent

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

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:DepreciationDepletionAndAmortization

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquireInvestments

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsForRepurchaseOfCommonStock
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateStatedPercentage

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:ProductOrService
nsc:AccessorialServicesPercentOfTotalRailwayOperatingRevenues

nsc:CommonStockTransactions

nsc:ProceedsfromPropertySalesandOtherTransactions

nsc:PurchasedServicesAndRents
us-gaap:AwardType
nsc:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSharesIssuedNetOfWithholdingTaxes

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:DeferredIncomeTaxExpenseBenefit
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
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:Depreciation

us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal

us-gaap:DividendsCommonStockCash
us-gaap:StatementEquityComponents

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions
us-gaap:AwardType

us-gaap:FuelCosts

us-gaap:GainLossOnDispositionOfAssets1
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:FinancialInstrument
us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInMaterialsAndSupplies

us-gaap:IncreaseDecreaseInOtherCurrentAssets

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:InterestPaidNet

us-gaap:LaborAndRelatedExpense

us-gaap:OciBeforeReclassificationsBeforeTaxAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax

us-gaap:OtherComprehensiveIncomeLossTax

us-gaap:OtherCostAndExpenseOperating

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic

us-gaap:ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:ProceedsFromDebtNetOfIssuanceCosts

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent
us-gaap:StatementEquityComponents
us-gaap:FinancialInstrument
us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
us-gaap:FinancialInstrument
us-gaap:RelatedPartyTransactionRate

us-gaap:RepaymentsOfDebtAndCapitalLeaseObligations
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedAndRetiredDuringPeriodShares

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue
us-gaap:StatementEquityComponents

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment
us-gaap:ShortTermDebtType
nsc:AccountsReceivableSecuritizationBalance

nsc:CostsOfObtainingRightsToNaturalResources
us-gaap:RetirementPlanFundingStatus, us-gaap:RetirementPlanType
nsc:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRateForInterestCost
us-gaap:RetirementPlanFundingStatus, us-gaap:RetirementPlanType
nsc:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRateForServiceCost

nsc:EnvironmentalCleanupLocations
us-gaap:FinancialInstrument
nsc:PensionPlanStatusChangeInInvestmentAffiliate
us-gaap:FairValueByFairValueHierarchyLevel
nsc:TrustOwnedLifeInsuranceFairValue

us-gaap:AccountsPayableOtherCurrent
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:AccountsReceivableNetNoncurrent

us-gaap:AccrualForEnvironmentalLossContingencies

us-gaap:AccrualForEnvironmentalLossContingenciesUndiscountedDueWithinOneYear

us-gaap:AccruedSalariesCurrent

us-gaap:AccruedVacationCurrent

us-gaap:AdditionalPaidInCapital

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:CashSurrenderValueOfLifeInsurance

us-gaap:CommonStockValueOutstanding

us-gaap:DebtAndCapitalLeaseObligations
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentFaceAmount
us-gaap:LongtermDebtType

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
us-gaap:DebtInstrument
us-gaap:DebtLongtermAndShorttermCombinedAmount

us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPensionPlanLiabilitiesCurrent
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPensionPlanLiabilitiesNoncurrent

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent
us-gaap:RetirementPlanFundingStatus, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanBenefitObligation
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:DefinedBenefitPlanFairValueOfPlanAssets
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency
us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanFundedStatusOfPlan

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation
us-gaap:DefinedBenefitPlanByPlanAssetCategories
us-gaap:DefinedBenefitPlanPlanAssetsInvestmentWithinPlanAssetCategoryPercentage
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType
us-gaap:Range
us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations
us-gaap:FinancialInstrument
us-gaap:DueToAffiliateCurrent

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
us-gaap:AwardType

us-gaap:EquityMethodInvestments
us-gaap:FinancialInstrument

us-gaap:InterestPayableCurrent
us-gaap:ShortTermDebtType
us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent
us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency
us-gaap:LongTermDebtFairValue
us-gaap:DebtInstrument
us-gaap:LongtermDebtWeightedAverageInterestRate

us-gaap:LossContingencyAccrualCarryingValueCurrent

us-gaap:LossContingencyAccrualCarryingValueNoncurrent

us-gaap:MaterialsSuppliesAndOther

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityNoncurrent
us-gaap:InvestmentType
us-gaap:OperatingLeasesFutureMinimumPaymentsDueThereafter

us-gaap:OtherAccruedLiabilitiesNoncurrent

us-gaap:OtherInvestments
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
us-gaap:AwardType
us-gaap:ValuationAllowancesAndReservesType
us-gaap:ValuationAllowancesAndReservesBalance

Tables

  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:CommonStockSharesOutstanding ▁▁▁▁▂▂▂▂▃▃▃▃▃▃▃▃▃▄▄▄▄▄▄▄▄▄▄▄▅▅▅▅▅▆▆▇▇▇████256257260263265268272280282284286288289290291293295297298301304308309309309308308311315314316319325330336347353357363368370369NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding 258NA264267269NA278283285NA289291292NA294296298NA302305309NANANANANANANANANANANANANANANA360NA371375374NA372371NA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic 257NA262264267NA275281283NA287289290NA292294297NA300302306NANANANANANANANANANANANANANANA355NA366369369NA367366NA
us-gaap:EarningsPerShareBasic ▂▂▂▂▂▂▂▂▂█▂▂▂▁▂▁▁▁▂▁▁▂▂▂▁▂▂▂▁▁▁▂▁▂▂▂▁▁▁▁▁▁▁▁▁1.482.562.52.722.532.592.542.521.9413.911.761.721.491.431.561.371.31.211.51.431.011.651.81.811.181.661.551.471.431.311.261.621.241.441.611.580.911.111.211.060.690.830.820.670.48
us-gaap:EarningsPerShareDiluted ▂▂▂▂▂▂▂▂▂█▂▂▂▁▂▁▁▁▂▁▁▂▂▂▁▂▂▂▁▁▁▂▁▁▂▂▁▁▁▁▁▁▁▁▁1.472.552.492.72.512.572.522.51.9313.791.751.711.481.421.551.361.291.21.491.411.01.641.791.791.171.641.531.461.411.31.241.61.231.421.591.560.91.091.191.040.680.820.810.660.47
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:Revenues ▆▆▇▇▇▇▇▇▆▆▆▆▅▅▅▅▄▅▆▆▅▇██▆▇▇▇▆▆▆▇▇▇▇▇▆▄▅▄▃▂▂▁▂262526902841292528402896294728982717266926702637257524902524245424202518271327132567287030233042268928812824280227382684269328742789279728892866262023922456243022382106206318571943
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▆▆▇▇▇▇▇▇▆▆▆▆▅▅▅▅▄▅▆▆▅▇██▆▇▇▇▆▆▆▇▇▇▇▇▆▄▅▄▃▂▂▁▂262526902841292528402896294728982717266926702637257524902524245424202518271327132567287030233042268928812824280227382684269328742789279728892866262023922456243022382106206318571943
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments nsc:AgricultureForestAndConsumerProducts,nsc:RailwayOperatingRevenuesMarketGroupMerchandise551NANANA558NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments nsc:Chemicals,nsc:RailwayOperatingRevenuesMarketGroupMerchandise█▃▄▃▁▂▄▂▁520468481473452458481465454NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments nsc:MetalsAndConstruction,nsc:RailwayOperatingRevenuesMarketGroupMerchandise▄▁▆█▅▄▇█▃367330391416385369401413356NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments nsc:RailwayOperatingRevenuesMarketGroupCoal▁▄▅█▇███▇298363403468435457464466434NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments nsc:RailwayOperatingRevenuesMarketGroupIntermodal▁▄▅▄▅█▇▅▃655697707701719755746714678NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments nsc:RailwayOperatingRevenuesMarketGroupMerchandise▄▂▇█▅▅▇▆▁167216301731175616861684173717181605NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CostsAndExpenses 2057NANANA1874NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingIncomeLoss ▃▇▇█▇█▇▇▆▇▆▆▅▅▅▅▄▄▅▅▃▆▇▇▄▆▆▆▄▄▅▇▅▅▇▆▃▄▅▅▃▃▃▂▁568962996106596610781020102683510149118887737618207707236428228146068919981019667881849836691714731934745800938875600642746733555549562468383
us-gaap:InterestExpense █▇▇█▇▆▅▂▃▂▂▄▅▅▅▄▄▅▃▂▂▁▄▄▄154152150153149148142131136134134140142142144138139142137134132129138139139NA131128129NA124122120NA114113112NA113115119NA118113117
us-gaap:OtherNonoperatingIncomeExpense ▄▄▄▄█▁▆▆▂▃▅▆▅▄▆▂▄▅▇▄▄▅▆▄▅22182222440302981323322422294162439192128321826NA3029135NA333129NA603427NA811720NA373617
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▁▇▇█▇███▅▇▆▆▄▄▅▄▃▂▅▅▂▆▇▇▃436828868934861930908924707893800780655641705636600524724699495790892898554NA748737697NANANANANANANANANANANANANANANANA
us-gaap:IncomeTaxExpenseBenefit ▇████████▁███████████████55162211212184228206214155-3075294283222225245231213163272266185279333336186NA266272247NA238319244NA330239190NA269243199NA178144106
us-gaap:IncomeTaxesPaidNet ▁▄▅▅▁▅▅▃▁▃▆▇▁▄▄▆▁▂▇▂▁█1613918920692051881197111253329121841582492362954312369NANA60NANANA23NANANA2NANANA3NANANA0NANANA23
us-gaap:ComprehensiveIncomeNetOfTax ▁█▇█▇▅██▄391728661725680574708717548NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss ▁▇▇█▇███▅381666657722677702702710552NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings381NA657722677NA702710552NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▁▂▂▂▂▂▂▂▁█▁▁▁▁▁▁▁▁▁▁▁3806656567206767007007095513967505496432416457404386360450432308NANANANANANANANANANANANANANANA323NA443390255NA301245NA
us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted ▁▂▂▂▂▂▂▂▁█▁▁▁▁▁▁▁▁▁▁▁3806666577226777027027105513967506497432416458404386359451432309NANANANANANANANANANANANANANANA323NA443390255NA301245NA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:Assets ████▇▇▇▇▇▇▆▆▆▆▆▆▅▆▅▅▅▅▅▅▅▄▄▃▃▃▃▂▂▂▂▂▁▂▁▁▁▁374383792337500371723706236239363223578836162357113515334922351453489234632343343378534260335273331032775332413320633040327003248331365306053059930342298402919129375285382831128478277282819928062276332773027369NANANA
us-gaap:Liabilities ██▇▇▇▆▆▄▄▄█▇██▇▇▇▇▆▆▅▆▆▆▆▆▆▅▅▅▅▄▄▃▂▂▁▂▁▁▁▁225542273922262218612173120877208421922919744193522242622260226182248322236220612156222072213982123320617208332076720963210072119421071204172048920582200731941319560186271805617851171271753017273168721716617016NANANA
us-gaap:LiabilitiesAndStockholdersEquity ████▇▇▇▇▇▇▆▆▆▆▆▆▅▆▅▅▅▅▅▅▅▄▄▃▃▃▃▂▂▂▂▂▁▂▁▁▁▁374383792337500371723706236239363223578836162357113515334922351453489234632343343378534260335273331032775332413320633040327003248331365306053059930342298402919129375285382831128478277282819928062276332773027369NANANA
us-gaap:StockholdersEquity ▅▅▆▆▆▆▆███▁1488415184152381531115331153621548016559164181635912727NANA12409NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital▆▇▇▇▇▇▁███2205220922192226221322161996226322552254NANANA2179NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▁▂▃▃▃▃▄█▇▇12902132071331013377134111344013645144561432714176NANANA10425NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:AssetsCurrent ▂▃▂▂▂▂▃▂▄▃▂▂▄▃▄▃▂▅▂▄▃▆▇█▇▇▄▃▄▃▃▂▄▁▁▄▁▄▅▄▅▃200220812016191419221862210919042479214919991936232722912317223919662633200224132115277830123266313030752494207823232242219918842332175118252315183224712633232826462246NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▃▃▂▁▂▂▃▂▅▃▃▃▅▅▅▄▃▅▂▄▂▅▇█▇▇▅▃▃▃▃▂▄▁▁▃▁▄▅▄▆▅▅▃▄60858045227441135872943010726907246429559569848665891101433889524973143216671522144398458767265369335682927624267823682711298551161996999722884
us-gaap:AccountsReceivableNetCurrent ▃▄▅▆▆▅▆▆▅▄▅▄▅▄▄▅▄▄▇▆▆▆▇▇▇▆▇▆█▇▇▇▆▆▆▅▄▂▄▃▃▁8899209731039104810091043103597395597392699894596098596194611031055103210551103112211091024108310721158110910781086105610221029991934807908892867766NANANA
 us-gaap:AccountsReceivableNetCurrent us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType nsc:OtherReceivables▁▃▅█▆█▇▇▁▅224238253272255269262262222252NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AccountsReceivableNetCurrent us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType us-gaap:TradeAccountsReceivable▁▂▄▇█▅▇▇▆▃665682720767793740781773751703NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsCurrent ▆███▆▇▂▄▅▇▂▂▂▃▂▂▃▅▂▂▄█▁▂▂▂▁▂▂▂▁▁▂▂▁▂▂▆▁▁▂▂240337325345235288701791892825779931337282101194556717334750657087345465823352717630547224035496888NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:PropertyPlantAndEquipmentGross NA43596NANANA43465NANANA42239NANANA41488NANANA40470NANANA38508NANANA37032NANANA35658NANANA33933NANANA32493NANANA31436NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType nsc:BallastNA2868NANANA2759NANANA2654NANANA2559NANANA2468NANANA2360NANANA2244NANANA2128NANANA2010NANANA1909NANANA1812NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType nsc:ConstructionInProcessEquipmentNA291NANANA437NANANA247NANANA295NANANA237NANANA199NANANA139NANANA177NANANA224NANANA143NANANA89NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType nsc:ConstructionInProcessRoadwayNA360NANANA442NANANA447NANANA664NANANA686NANANA500NANANA405NANANA378NANANA302NANANA169NANANA174NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType nsc:FreightCarsNA2988NANANA3183NANANA3256NANANA3377NANANA3437NANANA3276NANANA3225NANANA3214NANANA3008NANANA2779NANANA2828NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType nsc:LocomotivesNA5973NANANA5870NANANA5658NANANA5525NANANA5291NANANA5120NANANA4814NANANA4576NANANA4287NANANA4020NANANA3927NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType nsc:OtherRoadwayNA14261NANANA14072NANANA13636NANANA13096NANANA12662NANANA12078NANANA11704NANANA11223NANANA10779NANANA10765NANANA10324NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType nsc:TiesNA5536NANANA5346NANANA5181NANANA5011NANANA4846NANANA4628NANANA4464NANANA4255NANANA4015NANANA3846NANANA3710NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType nsc:TotalRoadwayNA30049NANANA29507NANANA28648NANANA27962NANANA27129NANANA25739NANANA24751NANANA23683NANANA22596NANANA21942NANANA21049NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType srt:OtherPropertyNA96NANANA437NANANA474NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:EquipmentNA11066NANANA11184NANANA10775NANANA10721NANANA10539NANANA10034NANANA9553NANANA9264NANANA8659NANANA7876NANANA7737NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LandNA2385NANANA2337NANANA2342NANANA2330NANANA2327NANANA2260NANANA2253NANANA2240NANANA2209NANANA2206NANANA2181NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:OtherMachineryAndEquipmentNA1082NANANA1071NANANA1004NANANA972NANANA1074NANANA952NANANA862NANANA817NANANANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:RailroadTransportationEquipmentNA7024NANANA6888NANANA6730NANANA6632NANANA6467NANANA6173NANANA5934NANANA5699NANANANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:TechnologyEquipmentNA732NANANA623NANANA610NANANA552NANANA500NANANA487NANANA513NANANA480NANANA408NANANA376NANANA379NANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment ▇▇██████▇▇▇▇▇▇▆▆▆▆▆▅▅▅▄▄▄▄▃▃▃▃▂▂▂▂▁▁▁▁1179411982123811237212374123741227612175120761190911987119841187211737116631158611520114781134411188110201081410740106341051210387102711015210042992298599738959694649351921793869262NANANA8793NANANA
us-gaap:PropertyPlantAndEquipmentNet ██████▇▇▇▇▇▇▇▇▆▆▆▆▆▅▅▅▅▄▄▄▄▄▄▃▃▃▃▂▂▂▂▁▁▁▁▁311793161431394312013115831091307123054030396303303016330033299272975129467293872913528992286822807527829276942723026927267682664526413260982587025736252602496824703244692397823671234512323122893227862269722643NANANA
us-gaap:LongTermInvestments ██▇▇▇▆▆▆▆▅▅▅▄▄▄▄▃▃▄▄▄▄▃▃▃▂▂▂▂▂▂▂▂▁▁▁▁▁▂▂▁▁347034283376330131983109310930583020298128882848280927772779263926172572274027242701267926102505246624392395236623412300231522782263223422402235219921932307229321662164NANANA
us-gaap:OtherAssetsNoncurrent ██▇██▂▄▃▃▃▁▁▁▁▁▁▁▁▁▁▂▁▄▄▄▃▁▁▁▁▁▁▁▁▃▃▃▃▃▃▃▃78780071475678417739228626725110310582736969676310398130903543423363246363656466617784268257246304229226221316NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:LiabilitiesCurrent ▅▅▇▆█▆▆▅▅▆▅▅▆▅▅▄▂▅▅▄▄▂▄▅▅▅▅▂▃▄▂▂▃▂▃▂▁▄▃▃▄▂223623002761245128852591244123522388254524132343244323392232210718312231236722032103178020822368232123052332181519042081182417741932170119361753156720821955193721931789NANANA
us-gaap:AccountsPayableCurrent ▅▇▇▇▆█▇▆▄▇▅▄▄▄▃▂▃▃▃▃▃▄▆▅▄▅▅▄▄▆▅▃▅▃▆▅▃▄▃▂▁▁1284142814071407133415051394132312171401128712231211121511311085111910911160114410941233138712451194126512671180118813621260112612431092132912541093118111311064987974NANANA
us-gaap:OtherAccruedLiabilitiesCurrent NA63NANANA89NANANA101NANANA94NANANA98NANANA96NANANA85NANANA81NANANA18NANANA17NANANA19NANANA
us-gaap:TaxesPayableCurrent ▃▄▄▅▇▅▄▅▄▄▄▅█▅▄▄▆▄▅▆▄▄▆▇▇▄▅▆▆▄▂▇▇▄▄▂▁▃▁▄▅▁200229202270338255230269217211206268379245218205299203273295210217301359323225241284319206150322320207221160102199116226252109NANANA
us-gaap:OtherLiabilitiesCurrent ▆▅█▇▇▂▅▂▄▁▅▂▄▁▅▃▄▁▅▂▄▁█▅▆▃▇▄▆▂▆▄▅▂▅▃▄▂▆▃▄▁352327401373378246317260304233320252303229333267313237334264298228392331359270377304350263362299337252331284309244347284306232NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:OtherLiabilitiesNoncurrent ▅▅▅▅▅▂▂▂▃▃▃▃▃▃▂▃▃▃▂▂▂▂▁▁▁▃████▇▇▇▇▅▅▅▅▅▅▅▅168317441727173817591266130213171352134713661385140714421322135813441385129513221302131210841122113014442166219822262237201820282053205017881795179417931784179117941801NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:StockholdersEquity ▅▅▆▆▆▆▆███▁1488415184152381531115331153621548016559164181635912727NANA12409NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital▆▇▇▇▇▇▁███2205220922192226221322161996226322552254NANANA2179NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▁▂▃▃▃▃▄█▇▇12902132071331013377134111344013645144561432714176NANANA10425NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▆▇▇▇▇▇▇███▄▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▁▁▁▁▁▁▁▂▂▂▂▂▂▂12902132071331013377134111344013645144561432714176106651062410493104251036710269102211019110079100171008710348101569836949093399045895489048643851285448581869387599097909492249339931791569027NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▆▆▅▅▅▅▆▆▆▇▆▆▆▆▆▆▆▆▆▆▆▆███▆▂▁▁▁▂▂▂▂▄▄▃▃▃▃▃▃-481-491-553-557-560-563-435-441-448-356-475-480-485-487-433-437-442-445-382-389-395-398-178-183-193-381-1040-1063-1086-1109-971-991-1010-1026-753-770-786-805-804-820-834-853NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▆▄▇█▄▃█▇▃▂▄▁▃▁9558951045107188184210581010816788889730846722NANANANANANANA506NANA588NANANA723NANANA1035NANANA652NANANA758NANANA354
us-gaap:NetCashProvidedByUsedInInvestingActivities █▃▂▁▅▁▅▄▅▆▅▃▄▁-233-441-471-502-350-517-355-415-371-307-350-420-404-502NANANANANANANA-748NANA-254NANANA-366NANANA-436NANANA-382NANANA-360NANANA-244
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▆▆▄▆▄▆▁█▅▆▅▆▇-694-414-394-708-478-696-316-1237-63-515-457-623-443-248NANANANANANANA-217NANA-255NANANA-338NANANA-46NANANA-861NANANA-233NANANA156
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▆▄▇█▄▃█▇▃▂▄▁▃▁9558951045107188184210581010816788889730846722NANANANANANANA506NANA588NANANA723NANANA1035NANANA652NANANA758NANANA354
us-gaap:NetIncomeLoss ▁▇▇█▇███▅381666657722677702702710552NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings381NA657722677NA702710552NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DepreciationDepletionAndAmortization █▆▇▆▆▅▄▃▃▂▁292285287284283282276274272268266NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities █▃▂▁▅▁▅▄▅▆▅▃▄▁-233-441-471-502-350-517-355-415-371-307-350-420-404-502NANANANANANANA-748NANA-254NANANA-366NANANA-436NANANA-382NANANA-360NANANA-244
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▁▃▃▃▂▄▃▂▁▂▂▂▂▄▁▃▁▄█▃▁▆366525515512467625490453383408432445438583372534398608891494392739NANA381NANANA379NANANA461NANANA423NANANA256NANANA243
us-gaap:PaymentsToAcquireInvestments ▁▁▁▂▁▁▁▁▁▁▁▁▁▁█▁▃▁▁▁▁█060102602230224960230203100NANA3NANANA5NANANA4NANANA4NANANA155NANANA0
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▆▆▄▆▄▆▁█▅▆▅▆▇-694-414-394-708-478-696-316-1237-63-515-457-623-443-248NANANANANANANA-217NANA-255NANANA-338NANANA-46NANANA-861NANANA-233NANANA156
us-gaap:PaymentsForRepurchaseOfCommonStock ▃▃▃▃▃▃█▂▂▂▂▂▂▂▂▂▂▁▂▂▃▁466549500550500481160040030030031020220020020320020078232350415152NANA50NANANA33NANANA400NANANA343NANANA0NANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:LongtermDebtType nsc:A2.55SeniorNotesDue2029,us-gaap:SeniorNotesNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:LongtermDebtType nsc:A3.40SeniorNotesDue2049,us-gaap:SeniorNotesNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

Common Stock Par Or Stated Value Per Share

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value256257260263265268272280282284286288289290291293295297298301304308309309309308308311315314316319325330336347353357363368370369366
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Authorized

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value258264267269278283285289291292294296298302305309360371375374372371
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value257262264267275281283287289290292294297300302306355366369369367366
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value1.482.562.52.722.532.592.542.521.9413.911.761.721.491.431.561.371.31.211.51.431.011.651.81.811.181.661.551.471.431.311.261.621.241.441.611.580.911.111.211.060.690.830.820.670.48
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value1.472.552.492.72.512.572.522.51.9313.791.751.711.481.421.551.361.291.21.491.411.01.641.791.791.171.641.531.461.411.31.241.61.231.421.591.560.91.091.191.040.680.820.810.660.47
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value262526902841292528402896294728982717266926702637257524902524245424202518271327132567287030233042268928812824280227382684269328742789279728892866262023922456243022382106206318571943
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value262526902841292528402896294728982717266926702637257524902524245424202518271327132567287030233042268928812824280227382684269328742789279728892866262023922456243022382106206318571943
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

nsc:Agriculture, nsc:RailwayOperatingRevenuesMarketGroupMerchandise



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value382394406385390388379357
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.213.913.913.613.513.213.113.1
Percentage of Revenues14.213.913.913.613.513.213.113.1
Percentage of Revenues nsc:Agriculture nsc:RailwayOperatingRevenuesMarketGroupMerchandise0.00.00.00.00.00.00.00.0

nsc:AgricultureForestAndConsumerProducts, nsc:RailwayOperatingRevenuesMarketGroupMerchandise



Period End2020-03-312019-03-31
Value551558
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.019.6
Percentage of Revenues21.019.6
Percentage of Revenues nsc:AgricultureForestAndConsumerProducts nsc:RailwayOperatingRevenuesMarketGroupMerchandise0.00.0

nsc:Automotive, nsc:RailwayOperatingRevenuesMarketGroupMerchandise



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value234245247251251250245253243
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.99.18.78.68.88.68.38.78.9
Percentage of Revenues8.99.18.78.68.88.68.38.78.9
Percentage of Revenues nsc:Automotive nsc:RailwayOperatingRevenuesMarketGroupMerchandise0.00.00.00.00.00.00.00.00.0

nsc:Chemicals, nsc:RailwayOperatingRevenuesMarketGroupMerchandise



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value520468481473452458481465454
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax19.817.416.916.215.915.816.316.016.7
Percentage of Revenues19.817.416.916.215.915.816.316.016.7
Percentage of Revenues nsc:Chemicals nsc:RailwayOperatingRevenuesMarketGroupMerchandise0.00.00.00.00.00.00.00.00.0

nsc:ForestAndConsumer, nsc:RailwayOperatingRevenuesMarketGroupMerchandise



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value205218210213217222208195
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.67.77.27.57.57.57.27.2
Percentage of Revenues7.67.77.27.57.57.57.27.2
Percentage of Revenues nsc:ForestAndConsumer nsc:RailwayOperatingRevenuesMarketGroupMerchandise0.00.00.00.00.00.00.00.0

nsc:MetalsAndConstruction, nsc:RailwayOperatingRevenuesMarketGroupMerchandise



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value367330391416385369401413356
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.012.313.814.213.612.713.614.313.1
Percentage of Revenues14.012.313.814.213.612.713.614.313.1
Percentage of Revenues nsc:MetalsAndConstruction nsc:RailwayOperatingRevenuesMarketGroupMerchandise0.00.00.00.00.00.00.00.00.0

us-gaap:StatementBusinessSegments

nsc:RailwayOperatingRevenuesMarketGroupCoal



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value298363403468435457464466434
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.413.514.216.015.315.815.716.116.0
Percentage of Revenues11.413.514.216.015.315.815.716.116.0
Percentage of Revenues nsc:RailwayOperatingRevenuesMarketGroupCoal0.00.00.00.00.00.00.00.00.0

nsc:RailwayOperatingRevenuesMarketGroupIntermodal



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value655697707701719755746714678
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax25.025.924.924.025.326.125.324.625.0
Percentage of Revenues25.025.924.924.025.326.125.324.625.0
Percentage of Revenues nsc:RailwayOperatingRevenuesMarketGroupIntermodal0.00.00.00.00.00.00.00.00.0

nsc:RailwayOperatingRevenuesMarketGroupMerchandise



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value167216301731175616861684173717181605
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax63.760.660.960.059.458.158.959.359.1
Percentage of Revenues63.760.660.960.059.458.158.959.359.1
Percentage of Revenues nsc:RailwayOperatingRevenuesMarketGroupMerchandise0.00.00.00.00.00.00.00.00.0

Operating Expenses

Costs And Expenses

us-gaap:CostsAndExpenses



Period End2020-03-312019-03-31
Value20571874
Percentage of CostsAndExpenses100.0100.0
Percentage of Revenues78.466.0

Operating Income Loss

us-gaap:OperatingIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value568962996106596610781020102683510149118887737618207707236428228146068919981019667881849836691714731934745800938875600642746733555549562468383
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues21.635.835.136.434.037.234.635.430.738.034.133.730.030.632.531.429.925.530.330.023.631.033.033.524.830.630.129.825.226.627.132.526.728.632.530.522.926.830.430.224.826.127.225.219.7

Interest Expense

us-gaap:InterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-302009-03-31
Value154152150153149148142131136134134140142142144138139142137134132129138139139131128129124122120114113112113115119118113117
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues5.95.75.35.25.25.14.84.55.05.05.05.35.55.75.75.65.75.65.04.95.14.54.64.65.24.64.64.74.64.24.33.93.94.34.64.75.35.76.16.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-302009-03-31
Value221822224403029813233224222941624391921283218263029135333129603427811720373617
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.80.70.80.81.50.01.01.00.30.50.91.20.90.91.10.20.71.01.40.70.81.01.10.61.01.11.04.91.21.11.02.11.21.03.30.70.91.81.90.9

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value436828868934861930908924707893800780655641705636600524724699495790892898554748737697
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues16.630.830.631.930.332.130.831.926.033.530.029.625.425.727.925.924.820.826.725.819.327.529.529.520.626.526.325.5

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-302009-03-31
Value55162211212184228206214155-3075294283222225245231213163272266185279333336186266272247238319244330239190269243199178144106
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues2.16.07.47.26.57.97.07.45.7-115.211.010.78.69.09.79.48.86.510.09.87.29.711.011.06.99.49.79.08.811.18.711.48.37.311.010.08.98.67.85.5

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-31
Value1613918920692051881197111253329121841582492362954312369602323023
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0
Percentage of Revenues0.65.26.77.00.37.16.44.10.34.29.512.50.57.46.310.10.11.410.91.60.512.92.20.80.10.10.01.2

Profit Loss

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value391728661725680574708717548
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues14.927.123.324.823.919.824.024.720.2

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value381666657722677702702710552
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues14.524.823.124.723.824.223.824.520.3

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value381657722677702710552
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues14.523.124.723.823.824.520.3
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value3806656567206767007007095513967505496432416457404386360450432308323443390255301245
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues14.524.723.124.623.824.223.824.520.3148.618.918.816.816.718.116.516.014.316.615.912.012.318.016.011.414.613.2

Net Income Loss Available To Common Stockholders Diluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value3806666577226777027027105513967506497432416458404386359451432309323443390255301245
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues14.524.823.124.723.824.223.824.520.3148.619.018.816.816.718.116.516.014.316.615.912.012.318.016.011.414.613.2

Assets

us-gaap:Assets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value37438379233750037172370623623936322357883616235711351533492235145348923463234334337853426033527333103277533241332063304032700324833136530605305993034229840291912937528538283112847827728281992806227633277302736926297
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value22554227392226221861217312087720842192291974419352224262226022618224832223622061215622207221398212332061720833207672096321007211942107120417204892058220073194131956018627180561785117127175301727316872171661701616690
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets60.260.059.458.858.657.657.453.754.654.263.863.764.464.464.264.363.864.463.863.762.962.762.563.464.265.267.266.767.067.867.366.566.665.363.862.761.862.261.661.161.962.263.5

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value37438379233750037172370623623936322357883616235711351533492235145348923463234334337853426033527333103277533241332063304032700324833136530605305993034229840291912937528538283112847827728281992806227633277302736926297
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value148841518415238153111533115362154801655916418163591272712409
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets39.840.040.641.241.442.442.646.345.445.836.235.6

us-gaap:StatementEquityComponents

nsc:AccumulatedOtherComprehensiveLossEquityInvestees



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-65-70-67-67-67-66-56-56-56
Percentage of StockholdersEquity-0.4-0.5-0.4-0.4-0.4-0.4-0.4-0.3-0.3
Percentage of Assets-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2
Percentage of Assets nsc:AccumulatedOtherComprehensiveLossEquityInvestees0.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-416-421-486-490-493-497-379-385-300
Percentage of StockholdersEquity-2.8-2.8-3.2-3.2-3.2-3.2-2.4-2.3-1.8
Percentage of Assets-1.1-1.1-1.3-1.3-1.3-1.4-1.0-1.1-0.8
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value-481-491-553-557-560-563-435-441-448-356-487
Percentage of StockholdersEquity-3.2-3.2-3.6-3.6-3.7-3.7-2.8-2.7-2.7-2.2-3.9
Percentage of Assets-1.3-1.3-1.5-1.5-1.5-1.6-1.2-1.2-1.2-1.0-1.4
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value22052209221922262213221619962263225522542179
Percentage of StockholdersEquity14.814.514.614.514.414.412.913.713.713.817.6
Percentage of Assets5.95.85.96.06.06.15.56.36.26.36.2
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value258259262265267269274281284285292
Percentage of StockholdersEquity1.71.71.71.71.71.81.81.71.71.72.4
Percentage of Assets0.70.70.70.70.70.70.80.80.80.80.8
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value1290213207133101337713411134401364514456143271417610425
Percentage of StockholdersEquity86.787.087.387.487.587.588.187.387.386.784.0
Percentage of Assets34.534.835.536.036.237.137.640.439.639.729.9
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value2002208120161914192218622109190424792149199919362327229123172239196626332002241321152778301232663130307524942078232322422199188423321751182523151832247126332328264622461999
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.35.55.45.15.25.15.85.36.96.05.75.56.66.66.76.55.87.76.07.26.58.49.19.99.69.58.06.87.67.47.46.57.96.16.48.16.68.89.48.49.58.27.6

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value60858045227441135872943010726907246429559569848665891101433889524973143216671522144398458767265369335682927624267823682711298551161996999722884618206527
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.61.51.20.71.11.02.01.23.01.92.11.82.72.72.82.51.73.21.32.71.62.94.35.04.74.43.11.92.22.22.31.22.81.00.92.40.92.94.03.14.23.60.00.00.02.40.00.0

Short Term Investments

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value8899209731039104810091043103597395597392699894596098596194611031055103210551103112211091024108310721158110910781086105610221029991934807908892867766870
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.42.42.62.82.82.82.92.92.72.72.82.72.82.72.82.92.82.83.33.23.13.23.33.43.43.23.53.53.83.73.63.73.63.63.63.53.42.93.23.23.12.83.3

us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

nsc:OtherReceivables



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value224238253272255269262262222252
Percentage of AccountsReceivableNetCurrent25.225.926.026.224.326.725.125.322.826.4
Percentage of Assets0.60.60.70.70.70.70.70.70.60.7
Percentage of Assets nsc:OtherReceivables0.00.00.00.00.00.00.00.00.00.0

us-gaap:TradeAccountsReceivable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value665682720767793740781773751703
Percentage of AccountsReceivableNetCurrent74.874.174.073.875.773.374.974.777.273.6
Percentage of Assets1.81.81.92.12.12.02.22.22.12.0
Percentage of Assets us-gaap:TradeAccountsReceivable0.00.00.00.00.00.00.00.00.00.0

Other Assets Current

us-gaap:OtherAssetsCurrent



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
Value240337325345235288701791892825779931337282101194556717334750657087345465823352717630547224035496888168
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.90.90.90.60.80.20.50.50.80.20.20.30.40.20.20.30.60.20.20.51.00.20.20.20.30.10.20.20.30.10.20.20.30.10.20.30.90.10.20.20.30.6

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value4359643465422394148840470385083703235658339333249331436
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets115.0119.9118.3118.9118.1115.8114.0117.5118.9115.2114.9

us-gaap:PropertyPlantAndEquipmentByType

nsc:Ballast



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value28682759265425592468236022442128201019091812
Percentage of PropertyPlantAndEquipmentGross6.66.36.36.26.16.16.16.05.95.95.8
Percentage of Assets7.67.67.47.37.27.16.97.07.06.86.6
Percentage of Assets nsc:Ballast0.00.00.00.00.00.00.00.00.00.00.0

nsc:ConstructionInProcessEquipment



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value29143724729523719913917722414389
Percentage of PropertyPlantAndEquipmentGross0.71.00.60.70.60.50.40.50.70.40.3
Percentage of Assets0.81.20.70.80.70.60.40.60.80.50.3
Percentage of Assets nsc:ConstructionInProcessEquipment0.00.00.00.00.00.00.00.00.00.00.0

nsc:ConstructionInProcessRoadway



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value360442447664686500405378302169174
Percentage of PropertyPlantAndEquipmentGross0.81.01.11.61.71.31.11.10.90.50.6
Percentage of Assets0.91.21.31.92.01.51.21.21.10.60.6
Percentage of Assets nsc:ConstructionInProcessRoadway0.00.00.00.00.00.00.00.00.00.00.0

nsc:FreightCars



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value29883183325633773437327632253214300827792828
Percentage of PropertyPlantAndEquipmentGross6.97.37.78.18.58.58.79.08.98.69.0
Percentage of Assets7.98.89.19.710.09.99.910.610.59.910.3
Percentage of Assets nsc:FreightCars0.00.00.00.00.00.00.00.00.00.00.0

nsc:Locomotives



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value59735870565855255291512048144576428740203927
Percentage of PropertyPlantAndEquipmentGross13.713.513.413.313.113.313.012.812.612.412.5
Percentage of Assets15.816.215.815.815.415.414.815.115.014.314.3
Percentage of Assets nsc:Locomotives0.00.00.00.00.00.00.00.00.00.00.0

nsc:OtherRoadway



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value1426114072136361309612662120781170411223107791076510324
Percentage of PropertyPlantAndEquipmentGross32.732.432.331.631.331.431.631.531.833.132.8
Percentage of Assets37.638.838.237.537.036.336.037.037.838.237.7
Percentage of Assets nsc:OtherRoadway0.00.00.00.00.00.00.00.00.00.00.0

nsc:Ties



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value55365346518150114846462844644255401538463710
Percentage of PropertyPlantAndEquipmentGross12.712.312.312.112.012.012.111.911.811.811.8
Percentage of Assets14.614.814.514.414.113.913.714.014.113.613.6
Percentage of Assets nsc:Ties0.00.00.00.00.00.00.00.00.00.00.0

nsc:TotalRoadway



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value3004929507286482796227129257392475123683225962194221049
Percentage of PropertyPlantAndEquipmentGross68.967.967.867.467.066.866.866.466.667.567.0
Percentage of Assets79.281.480.280.179.277.476.278.179.277.876.9
Percentage of Assets nsc:TotalRoadway0.00.00.00.00.00.00.00.00.00.00.0

srt:OtherProperty



Period End2019-12-312018-12-312017-12-31
Value96437474
Percentage of PropertyPlantAndEquipmentGross0.21.01.1
Percentage of Assets0.31.21.3
Percentage of Assets srt:OtherProperty0.00.00.0

us-gaap:Equipment



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value11066111841077510721105391003495539264865978767737
Percentage of PropertyPlantAndEquipmentGross25.425.725.525.826.026.125.826.025.524.224.6
Percentage of Assets29.230.930.230.730.830.229.430.530.327.928.3
Percentage of Assets us-gaap:Equipment0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Land



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value23852337234223302327226022532240220922062181
Percentage of PropertyPlantAndEquipmentGross5.55.45.55.65.75.96.16.36.56.86.9
Percentage of Assets6.36.46.66.76.86.86.97.47.77.88.0
Percentage of Assets us-gaap:Land0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherMachineryAndEquipment



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value1082107110049721074952862817
Percentage of PropertyPlantAndEquipmentGross2.52.52.42.32.72.52.32.3
Percentage of Assets2.93.02.82.83.12.92.72.7
Percentage of Assets us-gaap:OtherMachineryAndEquipment0.00.00.00.00.00.00.00.0

us-gaap:RailroadTransportationEquipment



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value70246888673066326467617359345699
Percentage of PropertyPlantAndEquipmentGross16.115.815.916.016.016.016.016.0
Percentage of Assets18.519.018.819.018.918.618.318.8
Percentage of Assets us-gaap:RailroadTransportationEquipment0.00.00.00.00.00.00.00.0

us-gaap:TechnologyEquipment



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value732623610552500487513480408376379
Percentage of PropertyPlantAndEquipmentGross1.71.41.41.31.21.31.41.31.21.21.2
Percentage of Assets1.91.71.71.61.51.51.61.61.41.31.4
Percentage of Assets us-gaap:TechnologyEquipment0.00.00.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment



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
Value11794119821238112372123741237412276121751207611909119871198411872117371166311586115201147811344111881102010814107401063410512103871027110152100429922985997389596946493519217938692628793
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets31.531.633.033.333.434.133.834.033.433.334.134.333.833.633.733.734.133.533.833.633.632.532.332.232.132.032.733.232.832.733.033.432.733.233.032.433.932.832.1

us-gaap:PropertyPlantAndEquipmentByType

nsc:Ballast



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value723676624584539498468437418372341
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment6.05.55.25.04.74.64.54.44.44.03.9
Percentage of Assets1.91.91.71.71.61.51.41.41.51.31.2
Percentage of Assets nsc:Ballast0.00.00.00.00.00.00.00.00.00.00.0

nsc:FreightCars



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value11481288128613451422141114291502146613831357
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment9.610.410.811.512.413.013.815.115.514.915.4
Percentage of Assets3.03.63.63.94.24.24.45.05.14.95.0
Percentage of Assets nsc:FreightCars0.00.00.00.00.00.00.00.00.00.00.0

nsc:Locomotives



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value21122262215821992126201019181798169215711516
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment17.618.318.118.718.518.618.518.117.917.017.2
Percentage of Assets5.66.26.06.36.26.05.95.95.95.65.5
Percentage of Assets nsc:Locomotives0.00.00.00.00.00.00.00.00.00.00.0

nsc:OtherRoadway



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value37863737352333613225298928142636248626192405
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment31.630.229.628.628.127.627.126.626.328.327.4
Percentage of Assets10.010.39.99.69.49.08.78.78.79.38.8
Percentage of Assets nsc:OtherRoadway0.00.00.00.00.00.00.00.00.00.00.0

nsc:Ties



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value14961448137413141229115611001027973955907
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment12.511.711.511.210.710.710.610.410.310.310.3
Percentage of Assets3.94.03.83.83.63.53.43.43.43.43.3
Percentage of Assets nsc:Ties0.00.00.00.00.00.00.00.00.00.00.0

nsc:TotalRoadway



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value79107812748272566937649161645807552054955108
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment66.063.162.861.860.460.059.358.558.359.358.1
Percentage of Assets20.921.621.020.820.219.519.019.119.319.518.7
Percentage of Assets nsc:TotalRoadway0.00.00.00.00.00.00.00.00.00.00.0

srt:OtherProperty



Period End2019-12-312018-12-312017-12-31
Value69267283
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment0.62.22.4
Percentage of Assets0.20.70.8
Percentage of Assets srt:OtherProperty0.00.00.0

us-gaap:Equipment



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value40034295414442024265405139553852368735123436
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment33.434.734.835.837.237.538.138.839.037.939.1
Percentage of Assets10.611.911.612.012.412.212.212.712.912.512.6
Percentage of Assets us-gaap:Equipment0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherMachineryAndEquipment



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value388380366329421349316282
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment3.23.13.12.83.73.23.02.8
Percentage of Assets1.01.01.00.91.21.01.00.9
Percentage of Assets us-gaap:OtherMachineryAndEquipment0.00.00.00.00.00.00.00.0

us-gaap:RailroadTransportationEquipment



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value19051951196119971944184817821707
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment15.915.816.517.016.917.117.217.2
Percentage of Assets5.05.45.55.75.75.65.55.6
Percentage of Assets us-gaap:RailroadTransportationEquipment0.00.00.00.00.00.00.00.0

us-gaap:TechnologyEquipment



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value355365334329296281292270277299320
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment3.02.92.82.82.62.62.82.72.93.23.6
Percentage of Assets0.91.00.90.90.90.80.90.91.01.11.2
Percentage of Assets us-gaap:TechnologyEquipment0.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value31179316143139431201311583109130712305403039630330301633003329927297512946729387291352899228682280752782927694272302692726768266452641326098258702573625260249682470324469239782367123451232312289322786226972264322247
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets83.383.483.783.984.185.884.685.384.184.985.886.085.285.385.185.686.284.685.584.384.983.382.081.581.982.084.285.384.584.884.785.584.185.784.783.184.682.481.682.581.882.784.6

us-gaap:PropertyPlantAndEquipmentByType

nsc:Ballast



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value21452083203019751929186217761691159215371471
Percentage of PropertyPlantAndEquipmentNet6.86.76.76.66.76.76.76.66.56.66.5
Percentage of Assets5.75.75.75.75.65.65.55.65.65.55.4
Percentage of Assets nsc:Ballast0.00.00.00.00.00.00.00.00.00.00.0

nsc:ConstructionInProcessEquipment



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value29143724729523719913917722414389
Percentage of PropertyPlantAndEquipmentNet0.91.40.81.00.80.70.50.70.90.60.4
Percentage of Assets0.81.20.70.80.70.60.40.60.80.50.3
Percentage of Assets nsc:ConstructionInProcessEquipment0.00.00.00.00.00.00.00.00.00.00.0

nsc:ConstructionInProcessRoadway



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value360442447664686500405378302169174
Percentage of PropertyPlantAndEquipmentNet1.11.41.52.22.41.81.51.51.20.70.8
Percentage of Assets0.91.21.31.92.01.51.21.21.10.60.6
Percentage of Assets nsc:ConstructionInProcessRoadway0.00.00.00.00.00.00.00.00.00.00.0

nsc:FreightCars



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value18401895197020322015186517961712154213961471
Percentage of PropertyPlantAndEquipmentNet5.86.16.56.87.06.76.76.76.36.06.5
Percentage of Assets4.95.25.55.85.95.65.55.65.45.05.4
Percentage of Assets nsc:FreightCars0.00.00.00.00.00.00.00.00.00.00.0

nsc:Locomotives



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value38613608350033263165311028962778259524492411
Percentage of PropertyPlantAndEquipmentNet12.211.611.511.210.911.210.910.810.610.510.6
Percentage of Assets10.210.09.89.59.29.48.99.29.18.78.8
Percentage of Assets nsc:Locomotives0.00.00.00.00.00.00.00.00.00.00.0

nsc:OtherRoadway



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value10475103351011397359437908988908587829381467919
Percentage of PropertyPlantAndEquipmentNet33.133.233.332.732.632.833.433.433.935.135.0
Percentage of Assets27.628.528.327.927.527.327.428.329.128.928.9
Percentage of Assets nsc:OtherRoadway0.00.00.00.00.00.00.00.00.00.00.0

nsc:Ties



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value40403898380736973617347233643228304228912803
Percentage of PropertyPlantAndEquipmentNet12.812.512.612.412.512.512.612.512.412.412.4
Percentage of Assets10.710.810.710.610.610.410.410.610.710.310.2
Percentage of Assets nsc:Ties0.00.00.00.00.00.00.00.00.00.00.0

nsc:TotalRoadway



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value2213921695211662070620192192481858717876170761644715941
Percentage of PropertyPlantAndEquipmentNet70.069.869.869.669.669.569.869.569.870.870.4
Percentage of Assets58.459.959.359.358.957.957.258.959.858.358.2
Percentage of Assets nsc:TotalRoadway0.00.00.00.00.00.00.00.00.00.00.0

srt:OtherProperty



Period End2019-12-312018-12-312017-12-31
Value27170191
Percentage of PropertyPlantAndEquipmentNet0.10.50.6
Percentage of Assets0.10.50.5
Percentage of Assets srt:OtherProperty0.00.00.0

us-gaap:Equipment



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value70636889663165196274598355985412497243644301
Percentage of PropertyPlantAndEquipmentNet22.322.221.921.921.621.621.021.020.318.819.0
Percentage of Assets18.619.018.618.718.318.017.217.817.415.515.7
Percentage of Assets us-gaap:Equipment0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Land



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value23852337234223302327226022532240220922062181
Percentage of PropertyPlantAndEquipmentNet7.57.57.77.88.08.28.58.79.09.59.6
Percentage of Assets6.36.46.66.76.86.86.97.47.77.88.0
Percentage of Assets us-gaap:Land0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherMachineryAndEquipment



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value694691638643653603546535
Percentage of PropertyPlantAndEquipmentNet2.22.22.12.22.32.22.02.1
Percentage of Assets1.81.91.81.81.91.81.71.8
Percentage of Assets us-gaap:OtherMachineryAndEquipment0.00.00.00.00.00.00.00.0

us-gaap:RailroadTransportationEquipment



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value51194937476946354523432541523992
Percentage of PropertyPlantAndEquipmentNet16.215.915.715.615.615.615.615.5
Percentage of Assets13.513.613.413.313.213.012.813.2
Percentage of Assets us-gaap:RailroadTransportationEquipment0.00.00.00.00.00.00.00.0

us-gaap:TechnologyEquipment



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value3772582762232042062212101317759
Percentage of PropertyPlantAndEquipmentNet1.20.80.90.70.70.70.80.80.50.30.3
Percentage of Assets1.00.70.80.60.60.60.70.70.50.30.2
Percentage of Assets us-gaap:TechnologyEquipment0.00.00.00.00.00.00.00.00.00.00.0

Long Term Investments

us-gaap:LongTermInvestments



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
Value3470342833763301319831093109305830202981288828482809277727792639261725722740272427012679261025052466243923952366234123002315227822632234224022352199219323072293216621641779
Percentage of LongTermInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.39.09.08.98.68.68.68.58.48.38.28.28.08.08.07.77.77.58.28.28.28.17.97.67.57.57.67.77.77.67.87.87.77.87.97.87.97.88.28.37.87.96.8

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value78780071475678417739228626725110310582736969676310398130903543423363246363656466617784268257246304229226221316272
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.12.11.92.02.10.51.10.80.70.70.30.30.20.20.20.20.20.20.30.30.40.31.11.01.01.00.20.20.20.20.20.20.30.30.90.90.91.10.80.80.81.21.0

Liabilities Current

us-gaap:LiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value2236230027612451288525912441235223882545241323432443233922322107183122312367220321031780208223682321230523321815190420811824177419321701193617531567208219551937219317892105
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.06.17.46.67.87.16.76.66.67.16.96.77.06.76.46.15.46.57.16.66.45.46.37.27.17.17.45.96.26.96.16.16.66.06.86.25.77.47.07.07.96.58.0

Accounts Payable Current

us-gaap:AccountsPayableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value12841428140714071334150513941323121714011287122312111215113110851119109111601144109412331387124511941265126711801188136212601126124310921329125410931181113110649879741140
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.43.83.83.83.64.23.83.73.43.93.73.53.43.53.33.23.33.23.53.43.33.74.23.83.73.94.03.93.94.54.23.94.23.84.74.43.94.24.03.93.63.64.3

Accounts Payable And Accrued Liabilities Current

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value63891019498968581181719
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.30.30.30.30.30.30.10.10.1

Taxes Payable Current

us-gaap:TaxesPayableCurrent



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
Value200229202270338255230269217211206268379245218205299203273295210217301359323225241284319206150322320207221160102199116226252109261
Percentage of TaxesPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.60.50.70.90.70.60.80.60.60.60.81.10.70.60.60.90.60.80.90.60.70.91.11.00.70.80.91.00.70.51.11.10.70.80.60.40.70.40.80.90.41.0

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent



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
Value352327401373378246317260304233320252303229333267313237334264298228392331359270377304350263362299337252331284309244347284306232220
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.90.91.11.01.00.70.90.70.80.70.90.70.90.71.00.80.90.71.00.80.90.71.21.01.10.81.21.01.10.91.21.01.10.91.21.01.10.91.21.01.10.80.8

Long Term Debt

Deferred Tax Liabilities Noncurrent

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value1683174417271738175912661302131713521347136613851407144213221358134413851295132213021312108411221130144421662198222622372018202820532050178817951794179317841791179418012030
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.54.64.64.74.73.53.63.73.73.83.94.04.04.13.84.04.04.03.94.04.03.93.33.43.54.46.97.27.37.46.86.97.07.26.36.36.56.46.46.56.56.67.7

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value148841518415238153111533115362154801655916418163591272712409
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets39.840.040.641.241.442.442.646.345.445.836.235.6

us-gaap:StatementEquityComponents

nsc:AccumulatedOtherComprehensiveLossEquityInvestees



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-65-70-67-67-67-66-56-56-56
Percentage of StockholdersEquity-0.4-0.5-0.4-0.4-0.4-0.4-0.4-0.3-0.3
Percentage of Assets-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2
Percentage of Assets nsc:AccumulatedOtherComprehensiveLossEquityInvestees0.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-416-421-486-490-493-497-379-385-300
Percentage of StockholdersEquity-2.8-2.8-3.2-3.2-3.2-3.2-2.4-2.3-1.8
Percentage of Assets-1.1-1.1-1.3-1.3-1.3-1.4-1.0-1.1-0.8
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value-481-491-553-557-560-563-435-441-448-356-487
Percentage of StockholdersEquity-3.2-3.2-3.6-3.6-3.7-3.7-2.8-2.7-2.7-2.2-3.9
Percentage of Assets-1.3-1.3-1.5-1.5-1.5-1.6-1.2-1.2-1.2-1.0-1.4
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value22052209221922262213221619962263225522542179
Percentage of StockholdersEquity14.814.514.614.514.414.412.913.713.713.817.6
Percentage of Assets5.95.85.96.06.06.15.56.36.26.36.2
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value258259262265267269274281284285292
Percentage of StockholdersEquity1.71.71.71.71.71.81.81.71.71.72.4
Percentage of Assets0.70.70.70.70.70.70.80.80.80.80.8
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value1290213207133101337713411134401364514456143271417610425
Percentage of StockholdersEquity86.787.087.387.487.587.588.187.387.386.784.0
Percentage of Assets34.534.835.536.036.237.137.640.439.639.729.9
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.0

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value129021320713310133771341113440136451445614327141761066510624104931042510367102691022110191100791001710087103481015698369490933990458954890486438512854485818693875990979094922493399317915690278501
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets34.534.835.536.036.237.137.640.439.639.730.330.429.929.929.929.930.329.730.130.130.831.130.629.829.028.828.829.329.128.528.529.329.230.530.931.932.832.733.333.733.033.032.3

Treasury Stock Value

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value-481-491-553-557-560-563-435-441-448-356-475-480-485-487-433-437-442-445-382-389-395-398-178-183-193-381-1040-1063-1086-1109-971-991-1010-1026-753-770-786-805-804-820-834-853-942
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-1.3-1.3-1.5-1.5-1.5-1.6-1.2-1.2-1.2-1.0-1.4-1.4-1.4-1.4-1.3-1.3-1.3-1.3-1.1-1.2-1.2-1.2-0.5-0.6-0.6-1.2-3.3-3.5-3.5-3.7-3.3-3.4-3.4-3.6-2.7-2.7-2.8-2.9-2.9-3.0-3.0-3.1-3.6

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-31
Value95589510451071881842105810108167888897308467225065887231035652758354
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues36.433.336.836.631.029.135.934.930.029.533.327.732.929.017.621.926.437.124.933.918.2

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-31
Value-233-441-471-502-350-517-355-415-371-307-350-420-404-502-748-254-366-436-382-360-244
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-8.9-16.4-16.6-17.2-12.3-17.9-12.0-14.3-13.7-11.5-13.1-15.9-15.7-20.2-26.1-9.4-13.4-15.6-14.6-16.1-12.6

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-31
Value-694-414-394-708-478-696-316-1237-63-515-457-623-443-248-217-255-338-46-861-233156
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-26.4-15.4-13.9-24.2-16.8-24.0-10.7-42.7-2.3-19.3-17.1-23.6-17.2-10.0-7.6-9.5-12.3-1.6-32.9-10.48.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-31
Value95589510451071881842105810108167888897308467225065887231035652758354
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues36.433.336.836.631.029.135.934.930.029.533.327.732.929.017.621.926.437.124.933.918.2

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value381666657722677702702710552
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues14.524.823.124.723.824.223.824.520.3

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value381657722677702710552
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues14.523.124.723.823.824.520.3
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.0

Profit Loss

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value292285287284283282276274272268266
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-31
Value-233-441-471-502-350-517-355-415-371-307-350-420-404-502-748-254-366-436-382-360-244
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-8.9-16.4-16.6-17.2-12.3-17.9-12.0-14.3-13.7-11.5-13.1-15.9-15.7-20.2-26.1-9.4-13.4-15.6-14.6-16.1-12.6

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-31
Value366525515512467625490453383408432445438583372534398608891494392739381379461423256243
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments To Acquire Investments

us-gaap:PaymentsToAcquireInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-31
Value06010260223022496023020310035441550
Percentage of PaymentsToAcquireInvestments0.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.00.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-31
Value-694-414-394-708-478-696-316-1237-63-515-457-623-443-248-217-255-338-46-861-233156
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-26.4-15.4-13.9-24.2-16.8-24.0-10.7-42.7-2.3-19.3-17.1-23.6-17.2-10.0-7.6-9.5-12.3-1.6-32.9-10.48.0

Proceeds From Issuance Of Long Term Debt

Repayments Of Long Term Debt

Payments Of Dividends

Payments Of Dividends

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value46654950055050048116004003003003102022002002032002007823235041515250334003430
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

Repayments Of Long Term Debt

Debt Instrument Interest Rate Stated Percentage

us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentInterestRateStatedPercentage

nsc:A2.55SeniorNotesDue2029, us-gaap:SeniorNotes



Period End2019-11-30
Value0.0255
Percentage of DebtInstrumentInterestRateStatedPercentage100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations nsc:A2.55SeniorNotesDue2029 us-gaap:SeniorNotes0.0

nsc:A3.40SeniorNotesDue2049, us-gaap:SeniorNotes



Period End2019-11-30
Value0.034
Percentage of DebtInstrumentInterestRateStatedPercentage133.3
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations nsc:A3.40SeniorNotesDue2049 us-gaap:SeniorNotes0.0

Effective Income Tax Rate Continuing Operations

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value2345657891113
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value91.5186.6683.1772.5767.961.5754.5247.6141.636.5532.95
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period

us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

us-gaap:PerformanceShares



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-06-302016-03-312015-03-312014-03-31
Value00000000000000100
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-03-312015-03-312014-03-312013-03-31
Value164160.02910.05610.02870.0208320.00.0570.0840.0215880.00.00.02970.080360.0860.0135390.0101470.0113505.0162000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod213.885.8268.493.8222.30.0142.50.0234.90.00.027.928.20.013.124.528.40.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value68156460632497299510922389608660828177457462
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet



Period End2019-12-312018-12-312017-12-31
Value459375322
Percentage of DeferredTaxAssetsNet100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value242117272561656310515294169
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value5450443935333219192114
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset



Period End2019-12-312019-09-30
Value539561
Percentage of OperatingLeaseRightOfUseAsset100.0100.0

Cash And Cash Equivalents Period Increase Decrease

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-31
Value60858054036049944681743010726907249561101
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductOrService

nsc:AccessorialServicesPercentOfTotalRailwayOperatingRevenues

nsc:AccessorialServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.050.00.05-0.0100000000000000020.050.00.040.00.04
Percentage of AccessorialServicesPercentOfTotalRailwayOperatingRevenues100.00.0100.0100.0100.00.0100.00.0100.0

nsc:CommonStockTransactions



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
Value146316222316-1143383424328-71115-5
Percentage of CommonStockTransactions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nsc:ProceedsfromPropertySalesandOtherTransactions



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value1586862152453513
Percentage of ProceedsfromPropertySalesandOtherTransactions100.0100.0100.0100.0100.0100.0100.0

nsc:PurchasedServicesAndRents



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-302009-03-31
Value403460423418424449450430401268377392377399386384379440451438423452429414392420410393403392391403405383377374335352334355
Percentage of PurchasedServicesAndRents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AwardType

nsc:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSharesIssuedNetOfWithholdingTaxes

us-gaap:PerformanceShares



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-03-312013-03-31
Value156450.00.00.0221241.00.00.094399.00.00.099805.00.00.00.0241757.00.00.0141386.0223253.0348189.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSharesIssuedNetOfWithholdingTaxes100.00.00.0100.00.00.0100.00.00.0100.00.00.00.0100.00.00.0100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value143712.0102.0363.0118881.00.00.099968.00.00.081318.00.00.00.0103936.00.00.099337.0520.0187449.00.00.0178250.00.017340.0174535.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSharesIssuedNetOfWithholdingTaxes91.90.00.053.70.00.0105.90.00.081.50.00.00.043.00.00.070.30.084.00.00.051.20.00.00.0

us-gaap:AllocatedShareBasedCompensationExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-06-302012-03-312011-09-302011-06-302011-03-31
Value271020166121316675270782743431-46103246377343742
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount



Period End2020-03-312019-09-302019-03-312018-09-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value000000000011110000000000
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount0.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.00.0100.00.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2840180-13953-371387-642382-34
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareDeclared



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value0.940.940.860.860.80.720.72
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-31
Value1110592765735494445-3078105585650765744264212312273-874881124016
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-13-10-11-11-11-15-14-14-14-12-13-13-13
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.01000000.00.00.00.00.00.00.00.01000000.00.00.00.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit0.0100.00.00.00.00.00.00.00.0100.00.00.00.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



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
Value3343434443444
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value48454544454444454443434343
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets1600.01500.01125.01466.71125.01466.71100.01125.01100.01433.31075.01075.01075.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



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
Value3445434443444
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value19232423232021222020202020
Percentage of DefinedBenefitPlanInterestCost633.3575.0600.0460.0575.0666.7525.0550.0500.0666.7500.0500.0500.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



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
Value-5-4-4-3-4-5-4-4-4-5-4-4-4
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-6-2-1-2-210100-10-1
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost120.050.025.066.750.0-20.0-0.0-25.0-0.0-0.025.0-0.025.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



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
Value1121212221222
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1099891091010109109
Percentage of DefinedBenefitPlanServiceCost1000.0900.0450.0800.0450.01000.0450.0500.0500.01000.0450.0500.0450.0

us-gaap:Depreciation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-31
Value292285286284283281276273272268265264260260259258253289276248246241238228226213206209
Percentage of Depreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal



Period End2020-03-312019-03-31
Value-3850
Percentage of DisposalGroupNotDiscontinuedOperationGainLossOnDisposal100.00.0

us-gaap:DividendsCommonStockCash



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value242247228230219203205
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value242247228230219203205
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-06-302012-03-312011-09-302011-06-302011-03-31
Value26338234961471343016231011110-2241022123111214
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions



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
Value1321692734610316
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AwardType

us-gaap:PerformanceShares



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value7009003001
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions53.80.00.0100.00.00.075.00.00.06.2

us-gaap:RestrictedStockUnitsRSU



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value5002003003
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions38.50.00.022.20.00.075.00.00.018.8

us-gaap:FuelCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-302009-03-31
Value189223226254250275274272266239198190213194181174149194221255264347387408432390391429379390413385412389259258254192153159
Percentage of FuelCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnDispositionOfAssets1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-31
Value838-3-111814512683042119831521021350299
Percentage of GainLossOnDispositionOfAssets1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:PropertyPlantAndEquipmentByType

us-gaap:RailroadTransportationEquipment



Period End2020-03-31
Value-385
Percentage of GainLossOnDispositionOfAssets1-4812.5

us-gaap:FinancialInstrument

us-gaap:IncomeLossFromEquityMethodInvestments

nsc:ConrailInc



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value9171315891218164510101015111191310
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nsc:TTXCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value4141912131216171612614108855672
Percentage of IncomeLossFromEquityMethodInvestments44.482.4146.280.0162.5133.3133.394.4100.0280.0140.0100.080.053.345.545.566.753.820.0

us-gaap:IncreaseDecreaseInAccountsReceivable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-31
Value-32-53-64-939-32106626-1847-4153-15-25215-1574823-23-48854934127-10139
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInMaterialsAndSupplies



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-31
Value21-22102821-6071523-23-44824-72-5-944-1711932-1317301921
Percentage of IncreaseDecreaseInMaterialsAndSupplies100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherCurrentAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-31
Value334415-43-1291-26-6-13139-20-17-3148-27-19-84103-13-106-176307-17-17-5-19
Percentage of IncreaseDecreaseInOtherCurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-31
Value-40-113-42-3-27503912212-3072-951889124-175200-2426096-97-205869631627209-107
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestPaidNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-31
Value1211631211591121698117769183752007020677190701987117871182756260725049
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LaborAndRelatedExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-302009-03-31
Value622630682712727757725706737714755703743662691667723702702724783714728715740735726780724724786736739765680670699598551639
Percentage of LaborAndRelatedExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OciBeforeReclassificationsBeforeTaxAttributableToParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value55800-1-1350
Percentage of OciBeforeReclassificationsBeforeTaxAttributableToParent100.0100.00.00.0100.0100.00.0

us-gaap:StatementEquityComponents

nsc:AccumulatedOtherComprehensiveLossEquityInvestees



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value5-300-1-100
Percentage of OciBeforeReclassificationsBeforeTaxAttributableToParent100.0-5.20.00.0100.07.40.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value061000-1250
Percentage of OciBeforeReclassificationsBeforeTaxAttributableToParent0.0105.20.00.0-0.092.60.0

us-gaap:OtherComprehensiveIncomeLossBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value1283554-16889-6154785-89776-10310116-3478143023837373332282829
Percentage of OtherComprehensiveIncomeLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

nsc:AccumulatedOtherComprehensiveLossEquityInvestees



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
Value5-300-1-110112001-2501-1
Percentage of OtherComprehensiveIncomeLossBeforeTax41.7-3.60.00.0-25.06.50.011.1-16.713.00.012.5-40.0-5.60.014.3-16.7

us-gaap:OtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value1062433-12867-4119552-54453-63763-2205101882323232019161716
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value1043367-4
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value-7-86-5-5-5157-8-87-134-7-7-794-7-6-7107-10-11-10329-8-7-299-38-36-36-33-32-32-28-29
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value221121-4022-35323-40353-1273411415141413131211139
Percentage of OtherComprehensiveIncomeLossTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherCostAndExpenseOperating



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
Value16613022819219056202191206167164200210215188202194
Percentage of OtherCostAndExpenseOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingActivitiesCashFlowStatement



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-31
Value-44-419-43-43-83-5-59-21-212-35-34-36-44-65-13-28-35-557-28-68-93644104
Percentage of OtherOperatingActivitiesCashFlowStatement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic



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
Value111212211111103111212
Percentage of ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted



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
Value100000001100102112111
Percentage of ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted100.00.00.00.00.00.00.00.0100.0100.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-312009-03-31
Value255244233-3-90-5-1-39-5-2-1-42-3-2-1-208-27-4-1-46-1081-27-55-512
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDividendsCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-31
Value242244247228230217219203205174175177177172173174176176177179181176167157155142
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromDebtNetOfIssuanceCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302014-12-312014-09-302013-03-312012-03-312011-03-31
Value0788350804250014800543-3-52980100059110010010006960
Percentage of ProceedsFromDebtNetOfIssuanceCosts0.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.00.0100.00.0

us-gaap:ProceedsFromStockOptionsExercised



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-03-31
Value4363162822316171433849281640918351910111525321114216
Percentage of ProceedsFromStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-5-4-4-3-4-7-6
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-5-4-4-3-4-7-6
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty

nsc:ConrailInc



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
Value353737383738383638353437353838363938394037
Percentage of RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nsc:TTXCompany



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value60616062436766645858575956565857565353
Percentage of RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty171.4164.9157.9167.6113.2186.1173.7182.9170.6156.8162.9155.3147.4155.6148.7150.0143.6132.5143.2

us-gaap:FinancialInstrument

us-gaap:RelatedPartyTransactionRate

nsc:ConrailInc



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
Value0.0290.00.00.00.0290.00.00.00.0290.00.00.00.0290.00.00.00.029
Percentage of RelatedPartyTransactionRate100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.0

us-gaap:RepaymentsOfDebtAndCapitalLeaseObligations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-31
Value43807500006501005205501000006000011010100203218408
Percentage of RepaymentsOfDebtAndCapitalLeaseObligations100.00.0100.00.00.00.0100.0100.0100.00.0100.0100.00.00.00.0100.00.00.0100.0100.00.0100.0100.0100.0100.0

us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:PerformanceShares



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-06-302016-03-31
Value213.380.5500000000000114168.73189.5797.750.0103.360.091.550.4000000000000057119.73116.4886.9184.052.55
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-03-312013-03-31
Value210.770.27000000000001023176.4203.25163.330.0172.19147.58148.320.00.0117.75120.2589.4870.3269.83
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue98.849.1104.5107.2167.10.0166.60.0162.00.00.0101.1138.40.0133.80.0

us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod

us-gaap:PerformanceShares



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value235935.00.00.00.0331099.00.00.00.0154189.00.00.00.0171080.00.00.00.0406038.00.00.00.0236601.00.00.0374099.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.0100.0

us-gaap:RestrictedStockUnitsRSU



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value202299.00.0142.0506.0165549.00.00.00.0160200.00.00.00.0137200.00.00.00.0175500.00.00.00.0166750.01000.00.0318150.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod85.70.00.00.050.00.00.00.0103.90.00.00.080.20.00.00.043.20.00.00.070.50.00.085.0

us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod

us-gaap:EmployeeStockOption



Period End2019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-09-302016-03-312015-06-302015-03-312014-03-31
Value2250.01190.01540.00.00.00.00.00.00.0341120.02980.0691310.0132880.0511010.0515240.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod100.0100.0100.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value000000000000000000000000000100000000000
Percentage of StockIssuedDuringPeriodSharesStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value17133319322716
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value17143519332817
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0107.7106.1100.0103.1103.7106.2

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-1-1-2-1-2-1-2
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation-5.9-7.7-6.1-5.3-6.2-3.7-12.5

us-gaap:StockRepurchasedAndRetiredDuringPeriodShares



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value222224822221122221233100550
Percentage of StockRepurchasedAndRetiredDuringPeriodShares100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-03-312012-03-312011-03-312010-03-31
Value466499500550500700160040030030031020220020020320020010323235041515250334003430
Percentage of StockRepurchasedAndRetiredDuringPeriodValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value212122223002016
Percentage of StockRepurchasedAndRetiredDuringPeriodValue4.54.24.04.418.85.05.3

us-gaap:CommonStock



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2323832
Percentage of StockRepurchasedAndRetiredDuringPeriodValue0.40.60.40.60.50.80.7

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value4434765264751292377282
Percentage of StockRepurchasedAndRetiredDuringPeriodValue95.195.295.695.080.894.294.0

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value1222222222211222555554
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShortTermDebtType

nsc:AccountsReceivableSecuritizationBalance

nsc:SecuritizationBorrowings



Period End2020-03-312019-12-312019-09-302018-12-31
Value003500
Percentage of AccountsReceivableSecuritizationBalance0.00.0100.00.0

nsc:CostsOfObtainingRightsToNaturalResources



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value88336336336336336336336336336336
Percentage of CostsOfObtainingRightsToNaturalResources100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanFundingStatus, us-gaap:RetirementPlanType

nsc:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRateForInterestCost

us-gaap:UnfundedPlan, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value0.03830.03130.03140.0315
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRateForInterestCost100.0100.0100.0100.0

us-gaap:UnfundedPlan, us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value0.03990.03330.03430.0351
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRateForInterestCost104.2106.4109.2111.4

us-gaap:RetirementPlanFundingStatus, us-gaap:RetirementPlanType

nsc:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRateForServiceCost

us-gaap:UnfundedPlan, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value0.04390.03830.04170.0436
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRateForServiceCost100.0100.0100.0100.0

us-gaap:UnfundedPlan, us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value0.04550.04010.04310.0464
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRateForServiceCost103.6104.7103.4106.4

nsc:EnvironmentalCleanupLocations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value109.0110.0113.0113.0112.0114.0120.0125.0128.0127.0131.0131.0134.0134.0137.0145.0143.0145.0145.0144.0145.0146.0147.0147.0145.0142.0146.0149.0151.0146.0149.0143.0
Percentage of EnvironmentalCleanupLocations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

nsc:PensionPlanStatusChangeInInvestmentAffiliate

nsc:ConrailInc



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value-3-111953
Percentage of PensionPlanStatusChangeInInvestmentAffiliate100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

nsc:TrustOwnedLifeInsuranceFairValue

us-gaap:FairValueInputsLevel2



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value170158201182189262239205186
Percentage of TrustOwnedLifeInsuranceFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsPayableOtherCurrent



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value1061221131101091109795302522
Percentage of AccountsPayableOtherCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:AccountsReceivableNetNoncurrent

nsc:OtherNoncurrentReceivables



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value232323555555
Percentage of AccountsReceivableNetNoncurrent100.0100.0100.0100.0100.0100.0

us-gaap:TradeAccountsReceivable



Period End2019-12-312018-12-31
Value2355
Percentage of AccountsReceivableNetNoncurrent100.0100.0

us-gaap:AccrualForEnvironmentalLossContingencies



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value5656606358555958565862656767646668697070696666655758595348423436383532333233343632
Percentage of AccrualForEnvironmentalLossContingencies100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccrualForEnvironmentalLossContingenciesUndiscountedDueWithinOneYear



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value1515151515151515151515151515151515151515151515151515121212121212121212121212121212
Percentage of AccrualForEnvironmentalLossContingenciesUndiscountedDueWithinOneYear100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedSalariesCurrent



Period End2019-12-312018-12-312017-12-312016-12-31
Value710828822650
Percentage of AccruedSalariesCurrent100.0100.0100.0100.0

us-gaap:AccruedVacationCurrent



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value136140133134135132130129123122123
Percentage of AccruedVacationCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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
Value2205220922192226221322161996226322552254224922282228217921692146214721432132214621602148215021132085202119791984197619111909190419171912191219511939189218901894187118091680
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value97743633455
Percentage of AllowanceForDoubtfulAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashSurrenderValueOfLifeInsurance



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value767556530415308470289264
Percentage of CashSurrenderValueOfLifeInsurance100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockValueOutstanding



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
Value258259262265267269274281284285288290291292293295297299300303306310311311311310310313316315317321327332337349354358364370371370368
Percentage of CommonStockValueOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtAndCapitalLeaseObligations



Period End2019-12-312018-12-31
Value1219611145
Percentage of DebtAndCapitalLeaseObligations100.0100.0

us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentFaceAmount

nsc:A2.55SeniorNotesDue2029, us-gaap:SeniorNotes



Period End2019-11-30
Value400
Percentage of DebtInstrumentFaceAmount100.0

nsc:A3.40SeniorNotesDue2049, us-gaap:SeniorNotes



Period End2019-11-30
Value400
Percentage of DebtInstrumentFaceAmount100.0

us-gaap:LongtermDebtType

us-gaap:RevolvingCreditFacility



Period End2020-03-312020-02-292019-12-31
Value800750750
Percentage of DebtInstrumentFaceAmount0.00.00.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value809839848486505
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet100.0100.0100.0100.0100.0

us-gaap:DebtInstrument

us-gaap:DebtLongtermAndShorttermCombinedAmount

nsc:A422MaturingTo2024



Period End2019-12-312018-12-31
Value24973082
Percentage of DebtLongtermAndShorttermCombinedAmount100.0100.0

nsc:A435Maturing2025To2031



Period End2019-12-312018-12-31
Value32652665
Percentage of DebtLongtermAndShorttermCombinedAmount130.886.5

nsc:A438Maturing2037To2052



Period End2019-12-312018-12-31
Value59045104
Percentage of DebtLongtermAndShorttermCombinedAmount236.4165.6

nsc:A579Maturing2097To2118



Period End2019-12-312018-12-31
Value13311131
Percentage of DebtLongtermAndShorttermCombinedAmount53.336.7

us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value104106113112117116120118119124130
Percentage of DeferredCompensationLiabilityClassifiedNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilities



Period End2019-12-312018-12-312017-12-312016-12-31
Value7274683566469729
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilitiesNet



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
Value682868156689659665186460646464146367632493679259919991409127904789898942
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGross



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value5134253666286036066301014957823871
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value20272676265455441415046
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value222284235464430454462834771617661
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value896964102108107114139145156
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesOther



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value560413434428438455466472387292267
Percentage of DeferredTaxLiabilitiesOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value67146422621293019072876884948188789474537195
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPensionPlanLiabilitiesCurrent

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value18181716
Percentage of DefinedBenefitPensionPlanLiabilitiesCurrent100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPensionPlanLiabilitiesNoncurrent

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value287308309346
Percentage of DefinedBenefitPensionPlanLiabilitiesNoncurrent100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value302278296333
Percentage of DefinedBenefitPensionPlanLiabilitiesNoncurrent105.290.395.896.2

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value23002200230022002200220019002100190017001600
Percentage of DefinedBenefitPlanAccumulatedBenefitObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value-253-259-283-307
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value1223
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax-0.4-0.8-0.7-1.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value-287-308-309-346
Percentage of DefinedBenefitPlanAmountsRecognizedInBalanceSheet100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value-126-266-168-347
Percentage of DefinedBenefitPlanAmountsRecognizedInBalanceSheet43.986.454.4100.3

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value194301452
Percentage of DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent100.0100.0100.0100.0

us-gaap:RetirementPlanFundingStatus, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

us-gaap:FundedPlan, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value0.03130.04180.03570.03830.0402
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate100.0100.0100.0100.0100.0

us-gaap:FundedPlan, us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value0.03380.04330.03740.04050.043
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate108.0103.6104.8105.7107.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanBenefitObligation

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value457466510528536
Percentage of DefinedBenefitPlanBenefitObligation100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value25882371254124202372
Percentage of DefinedBenefitPlanBenefitObligation566.3508.8498.2458.3442.5

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value148165169
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value719733731
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter485.8444.2432.5

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value374142
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value144142143
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths389.2346.3340.5

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value323637
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value144146145
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive450.0405.6391.9

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value333738
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value144145144
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour436.4391.9378.9

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value343840
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value144144143
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree423.5378.9357.5

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value364041
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value144143143
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo400.0357.5348.8

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value374143
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value181817
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear48.643.939.5

us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets

nsc:CommingledFunds, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2019-12-312018-12-312017-12-312016-12-31
Value1219223379
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.0100.0100.0100.0

us-gaap:AssetBackedSecurities, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2019-12-312018-12-31
Value2662
Percentage of DefinedBenefitPlanFairValueOfPlanAssets21.567.4

us-gaap:CorporateDebtSecurities, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2019-12-312018-12-31
Value8483
Percentage of DefinedBenefitPlanFairValueOfPlanAssets69.490.2

us-gaap:DefinedBenefitPlanCashAndCashEquivalents, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring



Period End2019-12-312018-12-31
Value5072
Percentage of DefinedBenefitPlanFairValueOfPlanAssets41.378.3

us-gaap:DefinedBenefitPlanDebtSecurity, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2019-12-312018-12-31
Value303287
Percentage of DefinedBenefitPlanFairValueOfPlanAssets250.4312.0

us-gaap:DefinedBenefitPlanEquitySecuritiesCommonStock, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring



Period End2019-12-312018-12-31
Value13291106
Percentage of DefinedBenefitPlanFairValueOfPlanAssets1098.31202.2

us-gaap:DefinedBenefitPlanEquitySecuritiesNonUs, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2019-12-312018-12-31
Value377314
Percentage of DefinedBenefitPlanFairValueOfPlanAssets311.6341.3

us-gaap:USGovernmentAgenciesDebtSecurities, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2019-12-312018-12-312017-12-312016-12-31
Value1728944
Percentage of DefinedBenefitPlanFairValueOfPlanAssets142.196.71.75.1

us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:FairValueByMeasurementFrequency

nsc:CommingledFunds, us-gaap:FairValueMeasurementsRecurring



Period End2019-12-312018-12-312017-12-312016-12-31
Value1219223379
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.0100.0100.0100.0

us-gaap:AssetBackedSecurities, us-gaap:FairValueMeasurementsRecurring



Period End2019-12-312018-12-31
Value2662
Percentage of DefinedBenefitPlanFairValueOfPlanAssets21.567.4

us-gaap:CorporateDebtSecurities, us-gaap:FairValueMeasurementsRecurring



Period End2019-12-312018-12-31
Value8483
Percentage of DefinedBenefitPlanFairValueOfPlanAssets69.490.2

us-gaap:DefinedBenefitPlanCashAndCashEquivalents, us-gaap:FairValueMeasurementsRecurring



Period End2019-12-312018-12-31
Value5072
Percentage of DefinedBenefitPlanFairValueOfPlanAssets41.378.3

us-gaap:DefinedBenefitPlanDebtSecurity, us-gaap:FairValueMeasurementsRecurring



Period End2019-12-312018-12-31
Value303287
Percentage of DefinedBenefitPlanFairValueOfPlanAssets250.4312.0

us-gaap:DefinedBenefitPlanEquitySecuritiesCommonStock, us-gaap:FairValueMeasurementsRecurring



Period End2019-12-312018-12-31
Value13291106
Percentage of DefinedBenefitPlanFairValueOfPlanAssets1098.31202.2

us-gaap:DefinedBenefitPlanEquitySecuritiesNonUs, us-gaap:FairValueMeasurementsRecurring



Period End2019-12-312018-12-31
Value377314
Percentage of DefinedBenefitPlanFairValueOfPlanAssets311.6341.3

us-gaap:USGovernmentAgenciesDebtSecurities, us-gaap:FairValueMeasurementsRecurring



Period End2019-12-312018-12-312017-12-312016-12-31
Value1728944
Percentage of DefinedBenefitPlanFairValueOfPlanAssets142.196.71.75.1

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring



Period End2019-12-312018-12-312017-12-312016-12-31
Value1379117811771185
Percentage of DefinedBenefitPlanFairValueOfPlanAssets1139.71280.4505.21500.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2019-12-312018-12-312017-12-312016-12-31
Value10839271196888
Percentage of DefinedBenefitPlanFairValueOfPlanAssets895.01007.6513.31124.1

us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring



Period End2019-12-312018-12-312017-12-312016-12-31
Value2462210523732073
Percentage of DefinedBenefitPlanFairValueOfPlanAssets2034.72288.01018.52624.1

us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value170158201182189
Percentage of DefinedBenefitPlanFairValueOfPlanAssets140.5171.786.3230.40.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value24622105237320732040
Percentage of DefinedBenefitPlanFairValueOfPlanAssets2034.72288.01018.52624.10.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanFundedStatusOfPlan

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value-287-308-309-346
Percentage of DefinedBenefitPlanFundedStatusOfPlan100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value-126-266-168-347
Percentage of DefinedBenefitPlanFundedStatusOfPlan43.986.454.4100.3

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value292263267252252244206215195177159
Percentage of DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value320296313286274274231239219197181
Percentage of DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanByPlanAssetCategories

us-gaap:DefinedBenefitPlanPlanAssetsInvestmentWithinPlanAssetCategoryPercentage

us-gaap:DefinedBenefitPlanDebtSecurity



Period End2019-12-312018-12-31
Value0.330.36
Percentage of DefinedBenefitPlanPlanAssetsInvestmentWithinPlanAssetCategoryPercentage100.0100.0

us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanEquitySecurities, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-31
Value0.670.64
Percentage of DefinedBenefitPlanPlanAssetsInvestmentWithinPlanAssetCategoryPercentage203.0177.8

us-gaap:Range

us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage

srt:Maximum



Period End2019-12-31
Value0.75
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage100.0

srt:Minimum



Period End2019-12-31
Value0.5
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage66.7

us-gaap:RetirementPlanType

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-31
Value0.75
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage100.0

us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations

us-gaap:DefinedBenefitPlanCashAndCashEquivalents, us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value0.020.030.02
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations100.0100.0100.0

us-gaap:DefinedBenefitPlanDebtSecurity, us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value0.240.250.24
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations1200.0833.31200.0

us-gaap:DefinedBenefitPlanEquitySecuritiesNonUs, us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value0.240.230.25
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations1200.0766.71250.0

us-gaap:DefinedBenefitPlanEquitySecuritiesUs, us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value0.50.490.49
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations2500.01633.32450.0

us-gaap:FinancialInstrument

us-gaap:DueToAffiliateCurrent

nsc:ConrailInc



Period End2019-12-312018-12-312017-12-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value2642021461291181098571
Percentage of DueToAffiliateCurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized



Period End2019-12-31
Value6
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0

us-gaap:AwardType

nsc:LtipAndTsop



Period End2019-12-312018-12-312017-12-312016-12-31
Value251010
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized33.30.00.00.0

us-gaap:RestrictedStockUnitsRSU



Period End2019-12-312018-12-312017-12-312016-12-31
Value251787
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized416.70.00.00.0

us-gaap:EquityMethodInvestments



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value26462532242521762102204720021897185317991753
Percentage of EquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

nsc:ConrailInc



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
Value140013871400140013001337130013001300129312001200120011991200120012001100
Percentage of EquityMethodInvestments0.052.40.00.00.052.80.00.00.053.30.00.00.055.10.00.00.052.3

nsc:MeridianSpeedwayLlc



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value271271272274274
Percentage of EquityMethodInvestments10.210.711.212.613.0

nsc:PanAmSouthernLlc



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value154155154155153
Percentage of EquityMethodInvestments5.86.16.47.17.3

nsc:TTXCompany



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value749692629471445
Percentage of EquityMethodInvestments28.327.325.921.621.2

us-gaap:OtherLongTermInvestments



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value8577777783
Percentage of EquityMethodInvestments3.23.03.23.53.9

us-gaap:InterestPayableCurrent



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value149139115119123118121112106108106
Percentage of InterestPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShortTermDebtType

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

nsc:SecuritizationBorrowings



Period End2020-03-312019-12-312018-12-31
Value412429400
Percentage of LineOfCreditFacilityRemainingBorrowingCapacity100.0100.0100.0

us-gaap:LongTermDebtAndCapitalLeaseObligations



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
Value11807118801108511076105691056010635914696379136928092739569956295559549939893938896889084298924891988148909890384998430843884328428797279857390678269316554656765746326637966796183
Percentage of LongTermDebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent



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
Value40031640140158558550050060060060060055055055055005005005005012243344544544747475052273250555563358361363648374484
Percentage of LongTermDebtAndCapitalLeaseObligationsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:LongTermDebtFairValue

us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1220712196114861147711154111451113596469736
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value146301480614131136381269812203123971089411771
Percentage of LongTermDebtFairValue119.8121.4123.0118.8113.8109.5111.3112.9120.9

us-gaap:DebtInstrument

us-gaap:LongtermDebtWeightedAverageInterestRate

nsc:A422MaturingTo2024



Period End2019-12-31
Value0.0422
Percentage of LongtermDebtWeightedAverageInterestRate100.0

nsc:A435Maturing2025To2031



Period End2019-12-31
Value0.0435
Percentage of LongtermDebtWeightedAverageInterestRate103.1

nsc:A438Maturing2037To2052



Period End2019-12-31
Value0.0438
Percentage of LongtermDebtWeightedAverageInterestRate103.8

nsc:A579Maturing2097To2118



Period End2019-12-31
Value0.0579
Percentage of LongtermDebtWeightedAverageInterestRate137.2

us-gaap:LossContingencyAccrualCarryingValueCurrent



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value212213187192174187
Percentage of LossContingencyAccrualCarryingValueCurrent100.0100.0100.0100.0100.0100.0

us-gaap:LossContingencyAccrualCarryingValueNoncurrent



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value171158179178191199
Percentage of LossContingencyAccrualCarryingValueNoncurrent100.0100.0100.0100.0100.0100.0

us-gaap:MaterialsSuppliesAndOther



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
Value265244266256228207267260245222245289281257301306315271288277268236
Percentage of MaterialsSuppliesAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseLiability



Period End2019-12-312019-09-302019-06-302019-03-31
Value538561586593
Percentage of OperatingLeaseLiability100.0100.0100.0100.0

us-gaap:OperatingLeaseLiabilityCurrent



Period End2019-12-31
Value97
Percentage of OperatingLeaseLiabilityCurrent100.0

us-gaap:OperatingLeaseLiabilityNoncurrent



Period End2019-12-312018-12-31
Value4410
Percentage of OperatingLeaseLiabilityNoncurrent100.00.0

us-gaap:InvestmentType

us-gaap:OperatingLeasesFutureMinimumPaymentsDueThereafter

us-gaap:FixedMaturities



Period End2019-12-312018-12-312017-12-312016-12-31
Value16169191
Percentage of OperatingLeasesFutureMinimumPaymentsDueThereafter100.0100.0100.0100.0

us-gaap:OtherAccruedLiabilitiesNoncurrent



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value159136170193132148193315146159180
Percentage of OtherAccruedLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherInvestments



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value152126186162162148139136137137
Percentage of OtherInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber

us-gaap:PerformanceShares



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value01111
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber100.0100.0100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value666172.0637035.0588405.0645645.0688725.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber145.944.633.634.950.6

us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:PerformanceShares



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value114.0462.7763.3661.1771.09
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value127.77111.8787.480.6878.14
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue112.0178.2137.9131.9109.9

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant



Period End2019-12-312018-12-312017-12-31
Value988
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant100.0100.0100.0

us-gaap:AwardType

nsc:Tsop



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value434401.0422973.0410895.0544217.0832676.0998896.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant4.74.94.70.00.00.0

us-gaap:EmployeeStockOption



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value9889114
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant100.0100.0100.00.00.00.0

us-gaap:ValuationAllowancesAndReservesType

us-gaap:ValuationAllowancesAndReservesBalance

nsc:AccountsPayableCasualtyAndOtherClaimsCurrent



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value212213187192174187166183201254233248259
Percentage of ValuationAllowancesAndReservesBalance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nsc:OtherLiabilitiesCasualtyAndOtherClaims



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value171158179178191199214258275261265320588
Percentage of ValuationAllowancesAndReservesBalance80.774.295.792.7109.8106.4128.9141.0136.8102.8113.7129.0227.0

Line plots across dimensions of each concept

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService, us-gaap:StatementBusinessSegments


us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments


us-gaap:StockholdersEquity us-gaap:StatementEquityComponents


us-gaap:AccountsReceivableNetCurrent us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType


us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType


us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment us-gaap:PropertyPlantAndEquipmentByType


us-gaap:PropertyPlantAndEquipmentNet us-gaap:PropertyPlantAndEquipmentByType


us-gaap:StockholdersEquity us-gaap:StatementEquityComponents


us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument, us-gaap:LongtermDebtType