NSC


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

Table of contents



us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:CostsAndExpenses

us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaidNet

us-gaap:InterestExpense

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:OperatingIncomeLoss

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherNonoperatingIncomeExpense

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

us-gaap:Revenues

us-gaap:Assets

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

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:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:LiabilitiesCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent

us-gaap:TaxesPayableCurrent

us-gaap:DebtAndCapitalLeaseObligations

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DepreciationDepletionAndAmortization

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquireInvestments

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance
us-gaap:ProductOrService
nsc:AccessorialServicesPercentOfTotalRailwayOperatingRevenues
us-gaap:ProductOrService
nsc:AncillaryServicesPercentOfTotalRailwayOperatingRevenues

nsc:CommonStockTransactions
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
nsc:IncomeLossDueToNoncashImpairmentChargesAgainstEquityMethodInvestment

nsc:ProceedsFromPropertySalesAndOtherTransactions

nsc:ProceedsfromPropertySalesandOtherTransactions

nsc:PurchasedServicesAndRents
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:DividendsCommonStockCash
us-gaap:StatementEquityComponents

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions
us-gaap:AwardType

us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:FuelCosts

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

us-gaap:IncreaseDecreaseInMaterialsAndSupplies

us-gaap:IncreaseDecreaseInOtherCurrentAssets

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:LaborAndRelatedExpense

us-gaap:OciBeforeReclassificationsBeforeTaxAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeTax
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: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:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedAndRetiredDuringPeriodShares

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue
us-gaap:StatementEquityComponents

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

nsc:EnvironmentalLocationsRepresentativeSampleLiability
us-gaap:InvestmentType
nsc:LongTermPurchaseCommitmentFutureAccessDueRelatedPartyTransactionYearFour

nsc:LongTermPurchaseCommitmentFutureAccessFeesDueRelatedPartyTransactionYearOne
us-gaap:InvestmentType
nsc:LongTermPurchaseCommitmentFutureAccessFeesDueRelatedPartyTransactionYearThree

nsc:LongTermPurchaseCommitmentFutureAccessFeesDueRelatedPartyTransactionYearTwo

nsc:PortionOfPotentialLossesWithinASpecifiedRangeCoveredByThirdPartyInsurerAsAPercentage

nsc:SelfInsuredPercentageOfPotentialLossesCovered
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:AllowanceForDoubtfulAccountsReceivable
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:AssetsHeldForSaleNotPartOfDisposalGroup

us-gaap:CashSurrenderValueOfLifeInsurance

us-gaap:CommonStockValueOutstanding

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

us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent

us-gaap:DeferredIncomeTaxLiabilities

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:DefinedBenefitPlanExpectedAmortizationNextFiscalYear
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedAmortizationOfPriorServiceCostCreditNextFiscalYear
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:RetirementPlanType
us-gaap:DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear

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:DefinedBenefitPlanUltimateHealthCareCostTrendRate1
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations
us-gaap:FinancialInstrument
us-gaap:DueToAffiliateCurrent
us-gaap:FinancialInstrument
us-gaap:DueToAffiliateNoncurrent

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
us-gaap:AwardType
us-gaap:FinancialInstrument
us-gaap:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity
us-gaap:FinancialInstrument
us-gaap:EquityMethodInvestmentOwnershipPercentage

us-gaap:EquityMethodInvestments
us-gaap:FinancialInstrument

us-gaap:FinanceLeaseLiability

us-gaap:InterestPayableCurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
us-gaap:ShortTermDebtType
us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

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

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
us-gaap:DebtInstrument
us-gaap:LongtermDebtWeightedAverageInterestRate

us-gaap:LossContingencyAccrualCarryingValueCurrent

us-gaap:LossContingencyAccrualCarryingValueNoncurrent

us-gaap:MaterialsSuppliesAndOther

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OtherAccruedLiabilitiesNoncurrent

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
us-gaap:ValuationAllowancesAndReservesType
us-gaap:ValuationAllowancesAndReservesBalance

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Expenses
Allocated Share Based Compensation Expense
Balance Sheet
Operating Lease Liability
Assets
Operating Lease Right Of Use Asset
Current Assets
Other Assets Current
NonCurrent Assets
Operating Lease Right Of Use Asset
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Operating Lease Liability
Current Liabilities
Other Accrued Liabilities Current
Noncurrent Liabilities
Operating Lease Liability Noncurrent
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Increase Decrease In Accounts Receivable
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
DividendsAndRepurchase
Dividends Common Stock Cash
OperatingLeaseLiability
Operating Lease Liability Current
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding ▁█250.0252.6NA256.1256.7258.7NA264.3267.1269.4NA278.2283.7285.9NA289.5291.2292.8NA294.7296.6298.9NA302.5305.5309.6NANANANANANANANANANANANANANANA360.5NANANA374.9NANANANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic ▁█248.9251.4NA254.6255.4257.3NA262.1264.8267.1NA275.5281.3283.5NA287.1289.0290.3NA292.7294.7297.2NA300.1302.9306.8NANANANANANANANANANANANANANANA355.2NANANA369.5NANANANA
us-gaap:EarningsPerShareBasic ▂▂▂▂▂▂▂▂▂▂▂▂▂▂█▂▂▂▁▂▁▁▁▂▁▁▂▂▂▁▂▂▂▁▁▁▂▁▂▂▂▁▁▁▁▁▁▁▁▁3.292.672.652.231.531.482.562.52.722.532.592.542.521.9413.911.761.721.491.431.561.371.31.211.51.431.011.651.81.811.181.661.551.471.431.311.261.621.241.441.611.580.911.111.211.060.690.830.820.670.48
us-gaap:EarningsPerShareDiluted ▂▂▂▂▂▂▂▂▂▂▂▂▂▂█▂▂▂▁▂▁▁▁▂▁▁▂▂▂▁▂▂▂▁▁▁▂▁▁▂▂▁▁▁▁▁▁▁▁▁3.282.662.642.221.531.472.552.492.72.512.572.522.51.9313.791.751.711.481.421.551.361.291.21.491.411.01.641.791.791.171.641.531.461.411.31.241.61.231.421.591.560.91.091.191.040.680.820.810.660.47
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
 TTM Greenblatt ROC _ _█▆▆▄▂▁▆▆▇▆▇▆▆▄▆▅▅▄▃▄▄▃▂▄▄▂▅▆▆▂▅▄▄▃▃▃▅▃▄▅▅▂▂▃▃▁▁1167.01015.0984.0840.0610.0568.0962.0996.01065.0966.01078.01020.01026.0835.01014.0911.0888.0773.0761.0820.0770.0723.0642.0822.0814.0606.0891.0998.01019.0667.0881.0849.0836.0691.0714.0731.0934.0745.0800.0938.0875.0600.0642.0746.0733.0555.0549.0NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:AllocatedShareBasedCompensationExpense ▄▄▂▄▃▂▃▃▅▄▃▃▄▄▃▃▂▆▂▃▃▆▂▂▂▆▁▃▃▆▃▂▃▇▂▂▃▇▃▂▃█16.016.03.013.010.02.07.010.020.016.06.012.013.016.06.07.05.027.00.07.08.027.04.03.04.031.0-4.06.010.032.07.04.06.037.04.00.07.034.09.03.07.042.0NANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTax █▆▄▄▁▁▆▅▆▆▄▆▆▄827.0681.0548.0573.0398.0391.0728.0661.0725.0680.0574.0708.0717.0548.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CostsAndExpenses ▃▃▂▃▁█▄▅▆▆1632.01624.01589.01666.01475.02057.01728.01845.01860.01874.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal NANA0.00.00.0-385.0NANA0.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest █▆▆▄▂▁▆▆▇▆▇▆▇▄▆▅▅▄▃▄▃▃▂▄▄▂▅▆▆▂▅▅▄▄1041.0866.0867.0724.0503.0436.0828.0868.0934.0861.0930.0908.0924.0707.0893.0800.0780.0655.0641.0705.0636.0600.0524.0724.0699.0495.0790.0892.0898.0554.0783.0748.0737.0697.0NANANANANANANANANANANANANANANANA
us-gaap:IncomeTaxExpenseBenefit █████▇████████▁███████████████████████████████222.0193.0196.0155.0111.055.0162.0211.0212.0184.0228.0206.0214.0155.0-3075.0294.0283.0222.0225.0245.0231.0213.0163.0272.0266.0185.0279.0333.0336.0186.0270.0266.0272.0247.0208.0238.0319.0244.0243.0330.0239.0190.0160.0269.0243.0199.0NANANANA
us-gaap:IncomeTaxesPaidNet ▅▂▄▃▁▁▃▄▅▁▅▄▃▁▃▅▇▁▄▄▅▁▂▆▂▁▇█▅▂▅▅▅▂▃▆▅▁▄▂▂▁▃▅▅▁222.027.0193.0117.0-15.016.0139.0189.0206.09.0205.0188.0119.07.0111.0253.0329.012.0184.0158.0249.02.036.0295.043.012.0369.0420.0253.060.0250.0247.0215.023.082.0272.0262.02.0168.076.042.03.0104.0245.0253.00.0NANANANA
us-gaap:InterestExpense █▇█▇▇▇▇▆▇▆▆▅▄▄▄▄▅▅▅▆▅▅▅▅▄▄▃▅▅▅▅▄▃▃▃▃▂▂▂▁▁▁▁▁▁▂161.0156.0160.0155.0156.0154.0152.0150.0153.0149.0148.0142.0131.0136.0134.0134.0140.0142.0142.0144.0138.0139.0142.0137.0134.0132.0129.0138.0139.0139.0137.0131.0128.0129.0129.0124.0122.0120.0116.0114.0113.0112.0115.0113.0115.0119.0NANANANA
us-gaap:InterestPaidNet ▆▄▇▄▆▄▆▄▆▄▆▂▇▂▇▂█▂█▂▇▂█▂▇▂▇▃▇▂▇▁▇▂▇▂▆▁▅▂▅▂▆▂▇▁171.0110.0182.0108.0166.0121.0163.0121.0159.0112.0169.081.0177.069.0183.075.0200.070.0206.077.0190.070.0198.071.0178.071.0182.085.0180.075.0187.061.0182.062.0176.065.0172.060.0139.077.0147.072.0157.064.0182.050.0NANANANA
us-gaap:NetIncomeLoss █▆▆▄▁▁▆▅▆▆▆▆▆▄819.0673.0671.0569.0392.0381.0666.0657.0722.0677.0702.0702.0710.0552.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▂▂▂▁▁▁▂▂▂▂▂▂▂▁█▁▁▁▁▁▁▁▁▁▁▁819.0672.0671.0567.0392.0380.0665.0656.0720.0676.0700.0700.0709.0551.03967.0505.0496.0432.0416.0457.0404.0386.0360.0450.0432.0308.0NANANANANANANANANANANANANANANA323.0NANANA255.0NANANANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted ▂▂▂▁▁▁▂▂▂▂▂▂▂▁█▁▁▁▁▁▁▁▁▁▁▁819.0673.0671.0568.0392.0380.0666.0657.0722.0677.0702.0702.0710.0551.03967.0506.0497.0432.0416.0458.0404.0386.0359.0451.0432.0309.0NANANANANANANANANANANANANANANA323.0NANANA255.0NANANANA
us-gaap:OperatingIncomeLoss █▇▆▅▃▃▆▆▇▆▇▇▇▅▇▆▆▄▄▅▄▄▃▅▅▃▆▆▇▄▅▅▅▄▄▄▆▄▅▆▅▃▃▄▄▃▂▃▂▁1167.01015.0984.0840.0610.0568.0962.0996.01065.0966.01078.01020.01026.0835.01014.0911.0888.0773.0761.0820.0770.0723.0642.0822.0814.0606.0891.0998.01019.0667.0881.0849.0836.0691.0714.0731.0934.0745.0800.0938.0875.0600.0642.0746.0733.0555.0549.0562.0468.0383.0
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▃▃▂▃▃▃▄▃▃▃▂▃▃▃▄▃▃▃▃▃▃▃▃▃▃▃▁▃▃▄█▃▃▃▂▃▃▃▁▃▃8.08.0-123.04.06.010.062.04.03.03.0-128.06.07.0-4.0119.05.05.02.0-54.04.05.03.0-63.07.06.03.0-220.05.010.0188.0659.023.023.023.0-138.020.019.016.0-273.017.016.0NANANANANANANANANA
us-gaap:OtherNonoperatingIncomeExpense ▃▁▃▃▄▂▂▂▂▃▁▃▃▁▂▂▃▂▂▃▁▂▂▃▂▂▂▃▂▂▃▃▃█▃▃▃▃▃▄▃▂▃▅▂▂35.07.043.039.049.022.018.022.022.044.00.030.029.08.013.023.032.024.022.029.04.016.024.039.019.021.028.032.018.026.039.030.029.0135.036.033.031.029.039.060.034.027.035.081.017.020.0NANANANA
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▇▆▅▅▂▆▆▇▇▇▇▇▇▆▆▆▆▅▅▅▅▄▅▆▆▅▇██▆▇▇▇▆▆▆▇▇▇▇▇▆▄▅▄▃▂▂▁▂2799.02639.02573.02506.02085.02625.02690.02841.02925.02840.02896.02947.02898.02717.02669.02670.02637.02575.02490.02524.02454.02420.02518.02713.02713.02567.02870.03023.03042.02689.02881.02824.02802.02738.02684.02693.02874.02789.02797.02889.02866.02620.02392.02456.02430.02238.02106.02063.01857.01943.0
us-gaap:Revenues ▇▆▅▅▂▆▆▇▇▇▇▇▇▆▆▆▆▅▅▅▅▄▅▆▆▅▇██▆▇▇▇▆▆▆▇▇▇▇▇▆▄▅▄▃▂▂▁▂2799.02639.02573.02506.02085.02625.02690.02841.02925.02840.02896.02947.02898.02717.02669.02670.02637.02575.02490.02524.02454.02420.02518.02713.02713.02567.02870.03023.03042.02689.02881.02824.02802.02738.02684.02693.02874.02789.02797.02889.02866.02620.02392.02456.02430.02238.02106.02063.01857.01943.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:Assets █▇▇█▇▇▇▇▇▇▆▆▆▆▆▆▆▆▆▅▅▅▅▅▅▄▄▄▄▄▄▃▃▃▃▂▂▂▂▁▁▁▁38754.037937.037962.038179.037962.037438.037923.037500.037172.037062.036239.036322.035788.036162.035711.035153.034922.035145.034892.034632.034334.033785.034260.033527.033310.032775.033241.033206.033040.032700.032483.031365.030605.030599.030342.029840.029191.029375.028538.028311.028478.027728.028199.0NANANA27369.0NANANA
us-gaap:Liabilities █▇▇▇▇▆▆▆▆▅▅▅▃▄▃▆▆▆▆▆▆▅▆▅▅▄▅▄▅▅▅▅▄▄▄▄▃▃▂▂▂▁▁24437.023294.023171.023238.023101.022554.022739.022262.021861.021731.020877.020842.019229.019744.019352.022426.022260.022618.022483.022236.022061.021562.022072.021398.021233.020617.020833.020767.020963.021007.021194.021071.020417.020489.020582.020073.019413.019560.018627.018056.017851.017127.017530.0NANANA17016.0NANANA
us-gaap:LiabilitiesAndStockholdersEquity █▇▇█▇▇▇▇▇▇▆▆▆▆▆▆▆▆▆▅▅▅▅▅▅▄▄▄▄▄▄▃▃▃▃▂▂▂▂▁▁▁▁38754.037937.037962.038179.037962.037438.037923.037500.037172.037062.036239.036322.035788.036162.035711.035153.034922.035145.034892.034632.034334.033785.034260.033527.033310.032775.033241.033206.033040.032700.032483.031365.030605.030599.030342.029840.029191.029375.028538.028311.028478.027728.028199.0NANANA27369.0NANANA
us-gaap:StockholdersEquity ▄▄▅▅▅▅▅▆▆▆▆▆███▁14317.014643.014791.014941.014861.014884.015184.015238.015311.015331.015362.015480.016559.016418.016359.012727.0NANA12409.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:AssetsCurrent ▇▄▄▅▄▂▃▂▂▂▂▃▂▄▃▂▂▄▃▄▃▂▅▂▄▃▆▇█▇▇▄▃▄▃▃▂▄▁▁▄▁▄3012.02303.02318.02579.02350.02002.02081.02016.01914.01922.01862.02109.01904.02479.02149.01999.01936.02327.02291.02317.02239.01966.02633.02002.02413.02115.02778.03012.03266.03130.03075.02494.02078.02323.02242.02199.01884.02332.01751.01825.02315.01832.02471.0NANANA2246.0NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue █▅▅▆▅▃▃▂▁▂▂▃▂▅▃▃▃▅▅▅▄▃▅▂▄▂▅▇█▇▇▅▃▃▃▃▂▄▁▁▃▁▄▅▄▆▅1670.0998.01115.01359.01143.0608.0580.0452.0274.0411.0358.0729.0430.01072.0690.0724.0642.0955.0956.0984.0866.0589.01101.0433.0889.0524.0973.01432.01667.01522.01443.0984.0587.0672.0653.0693.0356.0829.0276.0242.0678.0236.0827.01129.0855.01161.0996.0NANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents █▄▅▆▅▂▂▂▁▂▁▃▁▅▃▃1670.0998.01115.01359.01143.0608.0580.0540.0360.0499.0446.0817.0430.01072.0690.0724.0NANA956.0NANANA1101.0NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AccountsReceivableNetCurrent ▄▄▂▃▁▃▃▄▆▆▅▆▆▄▄▄▃▅▄▄▅▄▄▇▆▅▆▇▇▇▅▇▆█▇▆▇▆▅▅▅▄▁941.0944.0848.0883.0822.0889.0920.0973.01039.01048.01009.01043.01035.0973.0955.0973.0926.0998.0945.0960.0985.0961.0946.01103.01055.01032.01055.01103.01122.01109.01024.01083.01072.01158.01109.01078.01086.01056.01022.01029.0991.0934.0807.0NANANA766.0NANANA
us-gaap:OtherAssetsCurrent ▄▃▃▂▃▆███▆▇▂▄▅▇▂▂▂▃▂▂▃▅▂▂▄█▁▂▂▂▁▂▂▂▁▁▂▂▁▂▂▆155.0120.0134.090.0128.0240.0337.0325.0345.0235.0288.070.0179.0189.0282.057.079.093.0133.072.082.0101.0194.055.067.0173.0347.050.065.070.087.034.054.065.082.033.052.071.076.030.054.072.0240.0NANANA88.0NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:PropertyPlantAndEquipmentGross NANA43330.0NANANA43596.0NANANA43465.0NANANA42239.0NANANA41488.0NANANA40470.0NANANA38508.0NANANA37032.0NANANA35658.0NANANA33933.0NANANA32493.0NANANA31436.0NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType nsc:BallastNANA2973.0NANANA2868.0NANANA2759.0NANANA2654.0NANANA2559.0NANANA2468.0NANANA2360.0NANANA2244.0NANANA2128.0NANANA2010.0NANANA1909.0NANANA1812.0NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType nsc:ConstructionInProcessEquipmentNANA333.0NANANA291.0NANANA437.0NANANA247.0NANANA295.0NANANA237.0NANANA199.0NANANA139.0NANANA177.0NANANA224.0NANANA143.0NANANA89.0NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType nsc:ConstructionInProcessRoadwayNANA297.0NANANA360.0NANANA442.0NANANA447.0NANANA664.0NANANA686.0NANANA500.0NANANA405.0NANANA378.0NANANA302.0NANANA169.0NANANA174.0NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType nsc:FreightCarsNANA2780.0NANANA2988.0NANANA3183.0NANANA3256.0NANANA3377.0NANANA3437.0NANANA3276.0NANANA3225.0NANANA3214.0NANANA3008.0NANANA2779.0NANANA2828.0NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType nsc:LocomotivesNANA5478.0NANANA5973.0NANANA5870.0NANANA5658.0NANANA5525.0NANANA5291.0NANANA5120.0NANANA4814.0NANANA4576.0NANANA4287.0NANANA4020.0NANANA3927.0NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType nsc:OtherRoadwayNANA14320.0NANANA14261.0NANANA14072.0NANANA13636.0NANANA13096.0NANANA12662.0NANANA12078.0NANANA11704.0NANANA11223.0NANANA10779.0NANANA10765.0NANANA10324.0NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType nsc:TiesNANA5685.0NANANA5536.0NANANA5346.0NANANA5181.0NANANA5011.0NANANA4846.0NANANA4628.0NANANA4464.0NANANA4255.0NANANA4015.0NANANA3846.0NANANA3710.0NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType nsc:TotalRoadwayNANA30428.0NANANA30049.0NANANA29507.0NANANA28648.0NANANA27962.0NANANA27129.0NANANA25739.0NANANA24751.0NANANA23683.0NANANA22596.0NANANA21942.0NANANA21049.0NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType srt:OtherPropertyNANA91.0NANANA96.0NANANA437.0NANANA474.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:EquipmentNANA10417.0NANANA11066.0NANANA11184.0NANANA10775.0NANANA10721.0NANANA10539.0NANANA10034.0NANANA9553.0NANANA9264.0NANANA8659.0NANANA7876.0NANANA7737.0NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LandNANA2394.0NANANA2385.0NANANA2337.0NANANA2342.0NANANA2330.0NANANA2327.0NANANA2260.0NANANA2253.0NANANA2240.0NANANA2209.0NANANA2206.0NANANA2181.0NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:OtherMachineryAndEquipmentNANA1094.0NANANA1082.0NANANA1071.0NANANA1004.0NANANA972.0NANANA1074.0NANANA952.0NANANA862.0NANANA817.0NANANANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:RailroadTransportationEquipmentNANA7153.0NANANA7024.0NANANA6888.0NANANA6730.0NANANA6632.0NANANA6467.0NANANA6173.0NANANA5934.0NANANA5699.0NANANANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:TechnologyEquipmentNANA732.0NANANA732.0NANANA623.0NANANA610.0NANANA552.0NANANA500.0NANANA487.0NANANA513.0NANANA480.0NANANA408.0NANANA376.0NANANA379.0NANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment ▇▆▇▇▇▇▇██████▇▇▇▇▇▇▆▆▆▆▆▅▅▅▄▄▄▄▃▃▃▃▂▂▂▂▁▁▁▁11777.011672.011985.011873.011823.011794.011982.012381.012372.012374.012374.012276.012175.012076.011909.011987.011984.011872.011737.011663.011586.011520.011478.011344.011188.011020.010814.010740.010634.010512.010387.010271.010152.010042.09922.09859.09738.09596.09464.09351.09217.09386.09262.0NANANA8793.0NANANA
us-gaap:PropertyPlantAndEquipmentNet ███████████▇▇▇▇▇▇▇▆▆▆▆▆▆▅▅▅▄▄▄▄▄▃▃▃▃▂▂▂▂▁▁▁31355.031312.031345.031239.031217.031179.031614.031394.031201.031158.031091.030712.030540.030396.030330.030163.030033.029927.029751.029467.029387.029135.028992.028682.028075.027829.027694.027230.026927.026768.026645.026413.026098.025870.025736.025260.024968.024703.024469.023978.023671.023451.023231.0NANANA22643.0NANANA
us-gaap:LongTermInvestments █████▇▇▇▆▆▅▅▅▅▅▄▄▄▄▄▃▃▃▄▄▃▃▃▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁3658.03604.03590.03566.03590.03470.03428.03376.03301.03198.03109.03109.03058.03020.02981.02888.02848.02809.02777.02779.02639.02617.02572.02740.02724.02701.02679.02610.02505.02466.02439.02395.02366.02341.02300.02315.02278.02263.02234.02240.02235.02199.02193.0NANANA2164.0NANANA
us-gaap:OperatingLeaseRightOfUseAsset NANA433.0NANANA539.0561.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▇▇▇████▇██▂▄▃▃▃▁▁▁▁▁▁▁▁▁▁▂▁▄▄▄▃▁▁▁▁▁▁▁▁▃▃▃▃729.0718.0709.0795.0805.0787.0800.0714.0756.0784.0177.0392.0286.0267.0251.0103.0105.082.073.069.069.067.063.0103.098.0130.090.0354.0342.0336.0324.063.063.065.064.066.061.077.084.0268.0257.0246.0304.0NANANA316.0NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:AccountsPayableCurrent ▂▁▁▅▅▅▇▇▇▆█▆▅▄▇▅▄▄▄▃▂▂▂▃▃▂▄▆▄▄▅▅▃▃▆▄▃▄▂▅▄▂▃1116.01043.01016.01273.01268.01284.01428.01407.01407.01334.01505.01394.01323.01217.01401.01287.01223.01211.01215.01131.01085.01119.01091.01160.01144.01094.01233.01387.01245.01194.01265.01267.01180.01188.01362.01260.01126.01243.01092.01329.01254.01093.01181.0NANANA974.0NANANA
us-gaap:LiabilitiesCurrent █▅▄▃▃▅▅▇▆█▆▆▅▅▆▅▅▆▅▅▄▂▅▅▄▄▂▄▅▅▅▅▂▃▄▂▂▃▂▃▂▁▄2796.02249.02160.02005.01935.02236.02300.02761.02451.02885.02591.02441.02352.02388.02545.02413.02343.02443.02339.02232.02107.01831.02231.02367.02203.02103.01780.02082.02368.02321.02305.02332.01815.01904.02081.01824.01774.01932.01701.01936.01753.01567.02082.0NANANA1789.0NANANA
us-gaap:OperatingLeaseLiabilityCurrent NANA89.0NANANA97.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAccruedLiabilitiesCurrent NANA53.0NANANA63.0NANANA89.0NANANA101.0NANANA94.0NANANA98.0NANANA96.0NANANA85.0NANANA81.0NANANA18.0NANANA17.0NANANA19.0NANANA
us-gaap:OtherLiabilitiesCurrent ▅▆▄▇▆▆▅█▇▇▂▅▂▄▁▅▂▄▁▅▃▄▁▅▂▄▁█▅▆▃▇▄▆▂▆▄▅▂▅▃▄▂330.0344.0302.0386.0343.0352.0327.0401.0373.0378.0246.0317.0260.0304.0233.0320.0252.0303.0229.0333.0267.0313.0237.0334.0264.0298.0228.0392.0331.0359.0270.0377.0304.0350.0263.0362.0299.0337.0252.0331.0284.0309.0244.0NANANA232.0NANANA
us-gaap:TaxesPayableCurrent ▆█▅▅▄▃▄▄▅▇▅▄▅▄▄▄▅█▅▄▄▆▄▅▆▄▄▆▇▇▄▅▆▆▄▂▇▇▄▄▂▁▃302.0361.0263.0257.0239.0200.0229.0202.0270.0338.0255.0230.0269.0217.0211.0206.0268.0379.0245.0218.0205.0299.0203.0273.0295.0210.0217.0301.0359.0323.0225.0241.0284.0319.0206.0150.0322.0320.0207.0221.0160.0102.0199.0NANANA109.0NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:DebtAndCapitalLeaseObligations NANA12681.0NANANA12196.0NANANA11145.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LongTermDebtAndCapitalLeaseObligations █▇▇██▇▇▆▆▆▆▆▄▅▄▄▄▄▄▄▄▄▄▄▄▃▄▄▄▄▄▃▃▃▃▃▃▃▂▁▁▁▁12669.012116.012102.012634.012612.011807.011880.011085.011076.010569.010560.010635.09146.09637.09136.09280.09273.09569.09562.09555.09549.09398.09393.08896.08890.08429.08924.08919.08814.08909.08903.08499.08430.08438.08432.08428.07972.07985.07390.06782.06931.06554.06567.0NANANA6679.0NANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet ▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁███▇▇▇▇▇7035.06977.06922.06898.06874.06828.06815.06689.06596.06518.06460.06464.06414.06367.06324.09367.09259.09199.09140.09127.09047.08989.08942.0NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent ▆▆▆▅▅▅▅▅▅▅▂▂▂▃▃▃▃▃▃▂▃▃▃▂▂▂▂▁▁▁▃████▇▇▇▇▅▅▅▅1937.01952.01987.01701.01680.01683.01744.01727.01738.01759.01266.01302.01317.01352.01347.01366.01385.01407.01442.01322.01358.01344.01385.01295.01322.01302.01312.01084.01122.01130.01444.02166.02198.02226.02237.02018.02028.02053.02050.01788.01795.01794.01793.0NANANA1801.0NANANA
us-gaap:OperatingLeaseLiabilityNoncurrent NANA344.0NANANA441.0NANANA0.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA76.0NANANA104.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA67.0NANANA79.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA58.0NANANA70.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA57.0NANANA61.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA145.0NANANA206.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:StockholdersEquity ▄▄▅▅▅▅▅▆▆▆▆▆███▁14317.014643.014791.014941.014861.014884.015184.015238.015311.015331.015362.015480.016559.016418.016359.012727.0NANA12409.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AdditionalPaidInCapital ████▇▇▇▇▇▇▇▃████▇▇▆▆▆▆▆▆▆▆▆▆▅▅▃▃▃▃▁▁▁▁▁▁▂▂▁2240.02241.02248.02246.02217.02205.02209.02219.02226.02213.02216.01996.02263.02255.02254.02249.02228.02228.02179.02169.02146.02147.02143.02132.02146.02160.02148.02150.02113.02085.02021.01979.01984.01976.01911.01909.01904.01917.01912.01912.01951.01939.01892.0NANANA1809.0NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▆▆▆▆▆▆▇▇▇▇▇▇███▄▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▁▁▁▁▁▁▁▂▂▂12407.012737.012883.012911.012863.012902.013207.013310.013377.013411.013440.013645.014456.014327.014176.010665.010624.010493.010425.010367.010269.010221.010191.010079.010017.010087.010348.010156.09836.09490.09339.09045.08954.08904.08643.08512.08544.08581.08693.08759.09097.09094.09224.0NANANA9027.0NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▅▅▅▆▆▆▆▅▅▅▅▆▆▆▇▆▆▆▆▆▆▆▆▆▆▆▆███▆▂▁▁▁▂▂▂▂▄▄▃▃-578.0-586.0-594.0-471.0-475.0-481.0-491.0-553.0-557.0-560.0-563.0-435.0-441.0-448.0-356.0-475.0-480.0-485.0-487.0-433.0-437.0-442.0-445.0-382.0-389.0-395.0-398.0-178.0-183.0-193.0-381.0-1040.0-1063.0-1086.0-1109.0-971.0-991.0-1010.0-1026.0-753.0-770.0-786.0-805.0NANANA-853.0NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities █▇▄▇▃▆▄▇█▄▃█▇▃▂▄▁▃▁1082.01015.0870.01009.0803.0955.0895.01045.01071.0881.0842.01058.01010.0816.0788.0889.0730.0846.0722.0NANANANANANANA506.0909.0849.0588.0674.0898.0783.0723.0589.0813.0628.01035.0463.01064.01048.0652.0586.0746.0624.0758.0NANANANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▅█▅▆▆▇▃▂▁▅▁▅▃▄▆▅▃▄▁-327.0-202.0-357.0-278.0-307.0-233.0-441.0-471.0-502.0-350.0-517.0-355.0-415.0-371.0-307.0-350.0-420.0-404.0-502.0NANANANANANANA-748.0-607.0-393.0-254.0-525.0-562.0-441.0-366.0-542.0-520.0-496.0-436.0-567.0-404.0-419.0-382.0-450.0-275.0-371.0-360.0NANANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▇▃▄▅█▄▆▆▄▅▄▆▁▇▅▅▄▅▆-83.0-930.0-757.0-515.039.0-694.0-414.0-394.0-708.0-478.0-696.0-316.0-1237.0-63.0-515.0-457.0-623.0-443.0-248.0NANANANANANANA-217.0-537.0-311.0-255.0310.061.0-427.0-338.0-87.044.0-605.0-46.0138.0-1096.0-187.0-861.0-438.0-197.0-559.0-233.0NANANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect █▄▃▆▇▅▅▅▄▅▂▆▁▆▄672.0-117.0-244.0216.0535.028.040.0180.0-139.053.0-371.0387.0-642.0382.0-34.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:DeferredIncomeTaxExpenseBenefit ███▇█▇████████▁████████▇▇▇█▇▇▇██████████████▇█55.052.064.022.045.011.0105.092.076.057.035.049.044.045.0-3078.0105.058.056.050.076.057.044.0264.021.023.012.0273.04.025.0-8.047.072.069.074.087.0141.050.088.0113.0171.0131.0112.0140.0126.06.040.0NANANANA
us-gaap:DepreciationDepletionAndAmortization ██▆█▅█▆▆▆▅▅▄▃▂▂▁294.0292.0287.0293.0282.0292.0285.0287.0284.0283.0282.0276.0274.0272.0268.0266.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncreaseDecreaseInAccountsReceivable ▅▇▄▆▃▄▄▃▅▆▄▅▆▆▄▆▄▆▄▄▅▅▁▆▅▄▄▄▅▇▃▅▃▆▅▅▆▆▅▆▆█▂▅▅▇1.095.0-35.062.0-66.0-32.0-53.0-64.0-9.039.0-32.010.066.026.0-18.047.0-41.053.0-15.0-25.02.015.0-157.048.023.0-23.0-48.0-19.013.085.0-59.011.0-86.049.08.0-8.030.034.0-7.038.057.0127.0-101.016.025.0101.0NANANANA
us-gaap:NetCashProvidedByUsedInOperatingActivities █▇▄▇▃▆▄▇█▄▃█▇▃▂▄▁▃▁1082.01015.0870.01009.0803.0955.0895.01045.01071.0881.0842.01058.01010.0816.0788.0889.0730.0846.0722.0NANANANANANANA506.0909.0849.0588.0674.0898.0783.0723.0589.0813.0628.01035.0463.01064.01048.0652.0586.0746.0624.0758.0NANANANA
us-gaap:NetIncomeLoss █▆▆▄▁▁▆▅▆▆▆▆▆▄819.0673.0671.0569.0392.0381.0666.0657.0722.0677.0702.0702.0710.0552.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▅█▅▆▆▇▃▂▁▅▁▅▃▄▆▅▃▄▁-327.0-202.0-357.0-278.0-307.0-233.0-441.0-471.0-502.0-350.0-517.0-355.0-415.0-371.0-307.0-350.0-420.0-404.0-502.0NANANANANANANA-748.0-607.0-393.0-254.0-525.0-562.0-441.0-366.0-542.0-520.0-496.0-436.0-567.0-404.0-419.0-382.0-450.0-275.0-371.0-360.0NANANANA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▂▁▃▂▂▂▄▄▄▃▅▄▃▂▃▃▃▃▅▂▄▃▅█▄▂▆▄▃▂▄▅▄▂▆▄▄▃▆▄▃▃▄▂▂▁362.0265.0441.0318.0369.0366.0525.0515.0512.0467.0625.0490.0453.0383.0408.0432.0445.0438.0583.0372.0534.0398.0608.0891.0494.0392.0739.0570.0428.0381.0501.0586.0505.0379.0719.0554.0507.0461.0727.0545.0465.0423.0563.0338.0313.0256.0NANANANA
us-gaap:PaymentsToAcquireInvestments NANA7.01.05.00.06.00.010.02.06.00.02.02.03.00.02.02.04.096.00.023.00.02.00.03.0100.01.00.03.0101.022.02.05.09.02.08.04.047.021.063.04.063.0181.0105.0155.0NANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▇▃▄▅█▄▆▆▄▅▄▆▁▇▅▅▄▅▆-83.0-930.0-757.0-515.039.0-694.0-414.0-394.0-708.0-478.0-696.0-316.0-1237.0-63.0-515.0-457.0-623.0-443.0-248.0NANANANANANANA-217.0-537.0-311.0-255.0310.061.0-427.0-338.0-87.044.0-605.0-46.0138.0-1096.0-187.0-861.0-438.0-197.0-559.0-233.0NANANANA
us-gaap:PaymentsOfDividendsCommonStock ██▇▇▇███▇▇▆▆▅▅▄▄▄▄▃▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▂▂▂▂▂▂▁▁247.0249.0238.0240.0240.0242.0244.0247.0228.0230.0217.0219.0203.0205.0174.0175.0177.0177.0172.0173.0174.0176.0176.0177.0179.0181.0176.0176.0168.0167.0161.0161.0158.0157.0157.0159.0153.0155.0144.0149.0141.0142.0130.0132.0NANANANANANA
us-gaap:PaymentsForRepurchaseOfCommonStock ▅▄▃▂▂▃▃▃▃▃▃█▃▂▂▂▂▂▂▂▂▂▁▂▃▃▂▁▁▁▁▂▂▁▂▂▃▃▃▅▃▃▃▂▁▁934.0591.0479.0291.0203.0466.0549.0500.0550.0500.0481.01600.0400.0300.0300.0310.0202.0200.0200.0203.0200.0200.078.0232.0350.0415.0152.066.050.050.063.0250.0281.033.0138.0300.0450.0400.0440.0819.0449.0343.0426.0323.0114.00.0NANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312011-03-312010-03-31
Value250252256256258264267269278283285289291292294296298302305309360374
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

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312011-03-312010-03-31
Value248251254255257262264267275281283287289290292294297300302306355369
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

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value3.292.672.652.231.531.482.562.52.722.532.592.542.521.9413.911.761.721.491.431.561.371.31.211.51.431.011.651.81.811.181.661.551.471.431.311.261.621.241.441.611.580.911.111.211.060.690.830.820.670.48
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value3.282.662.642.221.531.472.552.492.72.512.572.522.51.9313.791.751.711.481.421.551.361.291.21.491.411.01.641.791.791.171.641.531.461.411.31.241.61.231.421.591.560.91.091.191.040.680.820.810.660.47
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value16163.01310.02.07.010.020166.01213166.07.05.0270.07.08.0274.03.04.031-4.06.010.0327.04.06.0374.00.07.0349.03.07.042
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.60.60.10.50.50.10.30.40.70.60.20.40.40.60.20.30.21.00.00.30.31.10.20.10.11.2-0.10.20.31.20.20.10.21.40.10.00.21.20.30.10.21.6

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value827681548573398391728661725680574708717548
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax29.525.821.322.919.114.927.123.324.823.919.824.024.720.2

Costs And Expenses

us-gaap:CostsAndExpenses

us-gaap:CostsAndExpenses


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1632162415891666147520571728184518601874
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax58.361.561.866.570.778.464.264.963.666.0

Disposal Group Not Discontinued Operation Gain Loss On Disposal

us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal

us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal


Disposal
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value000-385000000.000
Percentage of DisposalGroupNotDiscontinuedOperationGainLossOnDisposal0.00.00.0100.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.0-14.70.00.0

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1041866867724503436828868934861930908924707893800780655641705636600524724699495790892898554783748737697
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax37.232.833.728.924.116.630.830.631.930.332.130.831.926.033.530.029.625.425.727.925.924.820.826.725.819.327.529.529.520.627.226.526.325.5

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value22219319615511155162211212184228206214155-3075.0294283222225245231213163272266185279333336186270266272247208238319244243330239190160269243199
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.97.37.66.25.32.16.07.47.26.57.97.07.45.7-115.211.010.78.69.09.79.48.86.510.09.87.29.711.011.06.99.49.49.79.07.78.811.18.78.711.48.37.36.711.010.08.9

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value22227193117-15.0161391892069.02051881197.0111253329121841582492.03629543123694202536025024721523822722622.016876423.01042452530.0
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.91.07.54.7-0.70.65.26.77.00.37.16.44.10.34.29.512.50.57.46.310.10.11.410.91.60.512.913.98.32.28.78.77.70.83.110.19.10.16.02.61.50.14.310.010.40.0

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value161156160155156154152150153149148142131136134134140142142144138139142137134132129138139139137131128129129124122120116114113112115113115119
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.85.96.26.27.55.95.75.35.25.25.14.84.55.05.05.05.35.55.75.75.65.75.65.04.95.14.54.64.65.24.84.64.64.74.84.64.24.34.13.93.94.34.84.64.75.3

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value171110182108166121163121159112169811776918375200702067719070198711787118285180751876118262176651726013977147721576418250
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.14.27.14.38.04.66.14.35.43.95.82.76.12.56.92.87.62.78.33.17.72.97.92.66.62.86.32.85.92.86.52.26.52.36.62.46.02.25.02.75.12.76.62.67.52.2

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value819673671569392381666657722677702702710552
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax29.325.526.122.718.814.524.823.124.723.824.223.824.520.3

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value819673569392381657722677702710552
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax29.325.522.718.814.523.124.723.823.824.520.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312011-03-312010-03-31
Value8196726715673923806656567206767007007095513967505496432416457404386360450432308323255
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax29.325.526.122.618.814.524.723.124.623.824.223.824.520.3148.618.918.816.816.718.116.516.014.316.615.912.012.311.4

Net Income Loss Available To Common Stockholders Diluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312011-03-312010-03-31
Value8196736715683923806666577226777027027105513967506497432416458404386359451432309323255
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax29.325.526.122.718.814.524.823.124.723.824.223.824.520.3148.619.018.816.816.718.116.516.014.316.615.912.012.311.4

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value11671015984840610568962996106596610781020102683510149118887737618207707236428228146068919981019667881849836691714731934745800938875600642746733555549562468383
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax41.738.538.233.529.321.635.835.136.434.037.234.635.430.738.034.133.730.030.632.531.429.925.530.330.023.631.033.033.524.830.630.129.825.226.627.132.526.728.632.530.522.926.830.430.224.826.127.225.219.7

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value8.08.0-123.04.06.010.0624.03.03.0-128.06.07.0-4.01195.05.02.0-54.04.05.03.0-63.07.06.03.0-220.05.010.0188659232323-138.0201916-273.01716
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.3-4.80.20.30.42.30.10.10.1-4.40.20.2-0.14.50.20.20.1-2.20.20.20.1-2.50.30.20.1-7.70.20.37.022.90.80.80.8-5.10.70.70.6-9.80.60.6

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value8.08.04.06.010.04.03.03.06.07.0-4.0
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.30.20.30.40.10.10.10.20.2-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value357.043394922182222440.030298.01323322422294.0162439192128321826393029135363331293960342735811720
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.30.31.71.62.40.80.70.80.81.50.01.01.00.30.50.91.20.90.91.10.20.71.01.40.70.81.01.10.61.01.41.11.04.91.31.21.11.01.42.11.21.01.53.30.70.9

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value27992639257325062085262526902841292528402896294728982717266926702637257524902524245424202518271327132567287030233042268928812824280227382684269328742789279728892866262023922456243022382106206318571943
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

nsc:AgricultureForestAndConsumerProducts, nsc:RailwayOperatingRevenuesMarketGroupMerchandise


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value578539521498551572577558
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.720.420.823.921.020.119.719.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.720.420.823.921.020.119.719.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nsc:AgricultureForestAndConsumerProducts nsc:RailwayOperatingRevenuesMarketGroupMerchandise100.0100.0100.0100.0100.0100.0100.0100.0

nsc:Automotive, nsc:RailwayOperatingRevenuesMarketGroupMerchandise


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value20624023327093234245247251251250245253243
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.49.19.110.84.58.99.18.78.68.88.68.38.78.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.49.19.110.84.58.99.18.78.68.88.68.38.78.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nsc:Automotive nsc:RailwayOperatingRevenuesMarketGroupMerchandise100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nsc:Chemicals, nsc:RailwayOperatingRevenuesMarketGroupMerchandise


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value494459438428423520468481473452458481465454
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.617.417.017.120.319.817.416.916.215.915.816.316.016.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.617.417.017.120.319.817.416.916.215.915.816.316.016.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nsc:Chemicals nsc:RailwayOperatingRevenuesMarketGroupMerchandise100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nsc:MetalsAndConstruction, nsc:RailwayOperatingRevenuesMarketGroupMerchandise


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value402370336337293367330391416385369401413356
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.414.013.113.414.114.012.313.814.213.612.713.614.313.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.414.013.113.414.114.012.313.814.213.612.713.614.313.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nsc:MetalsAndConstruction nsc:RailwayOperatingRevenuesMarketGroupMerchandise100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments

nsc:RailwayOperatingRevenuesMarketGroupCoal


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value318312290250209298363403468435457464466434
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.411.811.310.010.011.413.514.216.015.315.815.716.116.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.411.811.310.010.011.413.514.216.015.315.815.716.116.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nsc:RailwayOperatingRevenuesMarketGroupCoal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nsc:RailwayOperatingRevenuesMarketGroupIntermodal


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value801719730700569655697707701719755746714678
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax28.627.228.427.927.325.025.924.924.025.326.125.324.625.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax28.627.228.427.927.325.025.924.924.025.326.125.324.625.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nsc:RailwayOperatingRevenuesMarketGroupIntermodal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nsc:RailwayOperatingRevenuesMarketGroupMerchandise


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value16801608155315561307167216301731175616861684173717181605
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax60.060.960.462.162.763.760.660.960.059.458.158.959.359.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax60.060.960.462.162.763.760.660.960.059.458.158.959.359.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nsc:RailwayOperatingRevenuesMarketGroupMerchandise100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value27992639257325062085262526902841292528402896294728982717266926702637257524902524245424202518271327132567287030233042268928812824280227382684269328742789279728892866262023922456243022382106206318571943
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3875437937379623817937962374383792337500371723706236239363223578836162357113515334922351453489234632343343378534260335273331032775332413320633040327003248331365306053059930342298402919129375285382831128478277282819927369
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2443723294231712323823101225542273922262218612173120877208421922919744193522242622260226182248322236220612156222072213982123320617208332076720963210072119421071204172048920582200731941319560186271805617851171271753017016
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets63.161.461.060.960.960.260.059.458.858.657.657.453.754.654.263.863.764.464.464.264.363.864.463.863.762.962.762.563.464.265.267.266.767.067.867.366.566.665.363.862.761.862.262.2

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3875437937379623817937962374383792337500371723706236239363223578836162357113515334922351453489234632343343378534260335273331032775332413320633040327003248331365306053059930342298402919129375285382831128478277282819927369
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value1431714643147911494114861148841518415238153111533115362154801655916418163591272712409
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets36.938.639.039.139.139.840.040.641.241.442.442.646.345.445.836.235.6

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

nsc:AccumulatedOtherComprehensiveLossEquityInvestees


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-68.0-68.0-68.0-64.0-64.0-65.0-70.0-67.0-67.0-67.0-66.0-56.0-56.0-56.0
Percentage of StockholdersEquity-0.5-0.5-0.5-0.4-0.4-0.4-0.5-0.4-0.4-0.4-0.4-0.4-0.3-0.3
Percentage of Assets-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2
Percentage of Assets nsc:AccumulatedOtherComprehensiveLossEquityInvestees0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-510.0-518.0-526.0-407.0-411.0-416.0-421.0-486.0-490.0-493.0-497.0-379.0-385.0-300.0
Percentage of StockholdersEquity-3.6-3.5-3.6-2.7-2.8-2.8-2.8-3.2-3.2-3.2-3.2-2.4-2.3-1.8
Percentage of Assets-1.3-1.4-1.4-1.1-1.1-1.1-1.1-1.3-1.3-1.3-1.4-1.0-1.1-0.8
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value-578.0-586.0-594.0-471.0-475.0-481.0-491.0-553.0-557.0-560.0-563.0-435.0-441.0-448.0-356.0-487.0
Percentage of StockholdersEquity-4.0-4.0-4.0-3.2-3.2-3.2-3.2-3.6-3.6-3.7-3.7-2.8-2.7-2.7-2.2-3.9
Percentage of Assets-1.5-1.5-1.6-1.2-1.3-1.3-1.3-1.5-1.5-1.5-1.6-1.2-1.2-1.2-1.0-1.4
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value2240224122482246221722052209221922262213221619962263225522542179
Percentage of StockholdersEquity15.615.315.215.014.914.814.514.614.514.414.412.913.713.713.817.6
Percentage of Assets5.85.95.95.95.85.95.85.96.06.06.15.56.36.26.36.2
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value248251254255256258259262265267269274281284285292
Percentage of StockholdersEquity1.71.71.71.71.71.71.71.71.71.71.81.81.71.71.72.4
Percentage of Assets0.60.70.70.70.70.70.70.70.70.70.70.80.80.80.80.8
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value12407127371288312911128631290213207133101337713411134401364514456143271417610425
Percentage of StockholdersEquity86.787.087.186.486.686.787.087.387.487.587.588.187.387.386.784.0
Percentage of Assets32.033.633.933.833.934.534.835.536.036.237.137.640.439.639.729.9
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value30122303231825792350200220812016191419221862210919042479214919991936232722912317223919662633200224132115277830123266313030752494207823232242219918842332175118252315183224712246
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.86.16.16.86.25.35.55.45.15.25.15.85.36.96.05.75.56.66.66.76.55.87.76.07.26.58.49.19.99.69.58.06.87.67.47.46.57.96.16.48.16.68.88.2

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value167099811151359114360858045227441135872943010726907246429559569848665891101433889524973143216671522144398458767265369335682927624267823682711298551161996618206
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.32.62.93.63.01.61.51.20.71.11.02.01.23.01.92.11.82.72.72.82.51.73.21.32.71.62.94.35.04.74.43.11.92.22.22.31.22.81.00.92.40.92.90.00.00.03.60.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-31
Value167099811151359114360858054036049944681743010726907249561101
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.32.62.93.63.01.61.51.41.01.31.22.21.23.01.92.12.73.2

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value9419448488838228899209731039104810091043103597395597392699894596098596194611031055103210551103112211091024108310721158110910781086105610221029991934807766
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.42.52.22.32.22.42.42.62.82.82.82.92.92.72.72.82.72.82.72.82.92.82.83.33.23.13.23.33.43.43.23.53.53.83.73.63.73.63.63.63.53.42.92.8

us-gaap:AccountsReceivableNetCurrent us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

nsc:OtherReceivables


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value205222219219230224238253272255269262262222252
Percentage of AccountsReceivableNetCurrent21.823.525.824.828.025.225.926.026.224.326.725.125.322.826.4
Percentage of Assets0.50.60.60.60.60.60.60.70.70.70.70.70.70.60.7
Percentage of Assets nsc:OtherReceivables0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TradeAccountsReceivable


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value736722629664592665682720767793740781773751703
Percentage of AccountsReceivableNetCurrent78.276.574.275.272.074.874.174.073.875.773.374.974.777.273.6
Percentage of Assets1.91.91.71.71.61.81.81.92.12.12.02.22.22.12.0
Percentage of Assets us-gaap:TradeAccountsReceivable0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value15512013490128240337325345235288701791892825779931337282101194556717334750657087345465823352717630547224088
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.30.40.20.30.60.90.90.90.60.80.20.50.50.80.20.20.30.40.20.20.30.60.20.20.51.00.20.20.20.30.10.20.20.30.10.20.20.30.10.20.30.90.3

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value433304359643465422394148840470385083703235658339333249331436
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets114.1115.0119.9118.3118.9118.1115.8114.0117.5118.9115.2114.9

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

nsc:Ballast


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value297328682759265425592468236022442128201019091812
Percentage of PropertyPlantAndEquipmentGross6.96.66.36.36.26.16.16.16.05.95.95.8
Percentage of Assets7.87.67.67.47.37.27.16.97.07.06.86.6
Percentage of Assets nsc:Ballast0.00.00.00.00.00.00.00.00.00.00.00.0

nsc:ConstructionInProcessEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value33329143724729523719913917722414389
Percentage of PropertyPlantAndEquipmentGross0.80.71.00.60.70.60.50.40.50.70.40.3
Percentage of Assets0.90.81.20.70.80.70.60.40.60.80.50.3
Percentage of Assets nsc:ConstructionInProcessEquipment0.00.00.00.00.00.00.00.00.00.00.00.0

nsc:ConstructionInProcessRoadway


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value297360442447664686500405378302169174
Percentage of PropertyPlantAndEquipmentGross0.70.81.01.11.61.71.31.11.10.90.50.6
Percentage of Assets0.80.91.21.31.92.01.51.21.21.10.60.6
Percentage of Assets nsc:ConstructionInProcessRoadway0.00.00.00.00.00.00.00.00.00.00.00.0

nsc:FreightCars


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value278029883183325633773437327632253214300827792828
Percentage of PropertyPlantAndEquipmentGross6.46.97.37.78.18.58.58.79.08.98.69.0
Percentage of Assets7.37.98.89.19.710.09.99.910.610.59.910.3
Percentage of Assets nsc:FreightCars0.00.00.00.00.00.00.00.00.00.00.00.0

nsc:Locomotives


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value547859735870565855255291512048144576428740203927
Percentage of PropertyPlantAndEquipmentGross12.613.713.513.413.313.113.313.012.812.612.412.5
Percentage of Assets14.415.816.215.815.815.415.414.815.115.014.314.3
Percentage of Assets nsc:Locomotives0.00.00.00.00.00.00.00.00.00.00.00.0

nsc:OtherRoadway


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value143201426114072136361309612662120781170411223107791076510324
Percentage of PropertyPlantAndEquipmentGross33.032.732.432.331.631.331.431.631.531.833.132.8
Percentage of Assets37.737.638.838.237.537.036.336.037.037.838.237.7
Percentage of Assets nsc:OtherRoadway0.00.00.00.00.00.00.00.00.00.00.00.0

nsc:Ties


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value568555365346518150114846462844644255401538463710
Percentage of PropertyPlantAndEquipmentGross13.112.712.312.312.112.012.012.111.911.811.811.8
Percentage of Assets15.014.614.814.514.414.113.913.714.014.113.613.6
Percentage of Assets nsc:Ties0.00.00.00.00.00.00.00.00.00.00.00.0

nsc:TotalRoadway


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value304283004929507286482796227129257392475123683225962194221049
Percentage of PropertyPlantAndEquipmentGross70.268.967.967.867.467.066.866.866.466.667.567.0
Percentage of Assets80.279.281.480.280.179.277.476.278.179.277.876.9
Percentage of Assets nsc:TotalRoadway0.00.00.00.00.00.00.00.00.00.00.00.0

srt:OtherProperty


Property
Period End2020-12-312019-12-312018-12-312017-12-31
Value9196437474
Percentage of PropertyPlantAndEquipmentGross0.20.21.01.1
Percentage of Assets0.20.31.21.3
Percentage of Assets srt:OtherProperty0.00.00.00.0

us-gaap:Equipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value1041711066111841077510721105391003495539264865978767737
Percentage of PropertyPlantAndEquipmentGross24.025.425.725.525.826.026.125.826.025.524.224.6
Percentage of Assets27.429.230.930.230.730.830.229.430.530.327.928.3
Percentage of Assets us-gaap:Equipment0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Land


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value239423852337234223302327226022532240220922062181
Percentage of PropertyPlantAndEquipmentGross5.55.55.45.55.65.75.96.16.36.56.86.9
Percentage of Assets6.36.36.46.66.76.86.86.97.47.77.88.0
Percentage of Assets us-gaap:Land0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherMachineryAndEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value10941082107110049721074952862817
Percentage of PropertyPlantAndEquipmentGross2.52.52.52.42.32.72.52.32.3
Percentage of Assets2.92.93.02.82.83.12.92.72.7
Percentage of Assets us-gaap:OtherMachineryAndEquipment0.00.00.00.00.00.00.00.00.0

us-gaap:RailroadTransportationEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value715370246888673066326467617359345699
Percentage of PropertyPlantAndEquipmentGross16.516.115.815.916.016.016.016.016.0
Percentage of Assets18.818.519.018.819.018.918.618.318.8
Percentage of Assets us-gaap:RailroadTransportationEquipment0.00.00.00.00.00.00.00.00.0

us-gaap:TechnologyEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value732732623610552500487513480408376379
Percentage of PropertyPlantAndEquipmentGross1.71.71.41.41.31.21.31.41.31.21.21.2
Percentage of Assets1.91.91.71.71.61.51.51.61.61.41.31.4
Percentage of Assets us-gaap:TechnologyEquipment0.00.00.00.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value117771167211985118731182311794119821238112372123741237412276121751207611909119871198411872117371166311586115201147811344111881102010814107401063410512103871027110152100429922985997389596946493519217938692628793
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets30.430.831.631.131.131.531.633.033.333.434.133.834.033.433.334.134.333.833.633.733.734.133.533.833.633.632.532.332.232.132.032.733.232.832.733.033.432.733.233.032.433.932.832.1

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment us-gaap:PropertyPlantAndEquipmentByType

nsc:Ballast


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value774723676624584539498468437418372341
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment6.56.05.55.25.04.74.64.54.44.44.03.9
Percentage of Assets2.01.91.91.71.71.61.51.41.41.51.31.2
Percentage of Assets nsc:Ballast0.00.00.00.00.00.00.00.00.00.00.00.0

nsc:FreightCars


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value102311481288128613451422141114291502146613831357
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment8.59.610.410.811.512.413.013.815.115.514.915.4
Percentage of Assets2.73.03.63.63.94.24.24.45.05.14.95.0
Percentage of Assets nsc:FreightCars0.00.00.00.00.00.00.00.00.00.00.00.0

nsc:Locomotives


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value191121122262215821992126201019181798169215711516
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment15.917.618.318.118.718.518.618.518.117.917.017.2
Percentage of Assets5.05.66.26.06.36.26.05.95.95.95.65.5
Percentage of Assets nsc:Locomotives0.00.00.00.00.00.00.00.00.00.00.00.0

nsc:OtherRoadway


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value392637863737352333613225298928142636248626192405
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment32.831.630.229.628.628.127.627.126.626.328.327.4
Percentage of Assets10.310.010.39.99.69.49.08.78.78.79.38.8
Percentage of Assets nsc:OtherRoadway0.00.00.00.00.00.00.00.00.00.00.00.0

nsc:Ties


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value160114961448137413141229115611001027973955907
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment13.412.511.711.511.210.710.710.610.410.310.310.3
Percentage of Assets4.23.94.03.83.83.63.53.43.43.43.43.3
Percentage of Assets nsc:Ties0.00.00.00.00.00.00.00.00.00.00.00.0

nsc:TotalRoadway


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value819379107812748272566937649161645807552054955108
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment68.466.063.162.861.860.460.059.358.558.359.358.1
Percentage of Assets21.620.921.621.020.820.219.519.019.119.319.518.7
Percentage of Assets nsc:TotalRoadway0.00.00.00.00.00.00.00.00.00.00.00.0

srt:OtherProperty


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-31
Value6869267283
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment0.60.62.22.4
Percentage of Assets0.20.20.70.8
Percentage of Assets srt:OtherProperty0.00.00.00.0

us-gaap:Equipment


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value372440034295414442024265405139553852368735123436
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment31.133.434.734.835.837.237.538.138.839.037.939.1
Percentage of Assets9.810.611.911.612.012.412.212.212.712.912.512.6
Percentage of Assets us-gaap:Equipment0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherMachineryAndEquipment


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value399388380366329421349316282
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment3.33.23.13.12.83.73.23.02.8
Percentage of Assets1.11.01.01.00.91.21.01.00.9
Percentage of Assets us-gaap:OtherMachineryAndEquipment0.00.00.00.00.00.00.00.00.0

us-gaap:RailroadTransportationEquipment


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value189219051951196119971944184817821707
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment15.815.915.816.517.016.917.117.217.2
Percentage of Assets5.05.05.45.55.75.75.65.55.6
Percentage of Assets us-gaap:RailroadTransportationEquipment0.00.00.00.00.00.00.00.00.0

us-gaap:TechnologyEquipment


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value391355365334329296281292270277299320
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment3.33.02.92.82.82.62.62.82.72.93.23.6
Percentage of Assets1.00.91.00.90.90.90.80.90.91.01.11.2
Percentage of Assets us-gaap:TechnologyEquipment0.00.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3135531312313453123931217311793161431394312013115831091307123054030396303303016330033299272975129467293872913528992286822807527829276942723026927267682664526413260982587025736252602496824703244692397823671234512323122643
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets80.982.582.681.882.283.383.483.783.984.185.884.685.384.184.985.886.085.285.385.185.686.284.685.584.384.983.382.081.581.982.084.285.384.584.884.785.584.185.784.783.184.682.482.7

us-gaap:PropertyPlantAndEquipmentNet us-gaap:PropertyPlantAndEquipmentByType

nsc:Ballast


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value219921452083203019751929186217761691159215371471
Percentage of PropertyPlantAndEquipmentNet7.06.86.76.76.66.76.76.76.66.56.66.5
Percentage of Assets5.85.75.75.75.75.65.65.55.65.65.55.4
Percentage of Assets nsc:Ballast0.00.00.00.00.00.00.00.00.00.00.00.0

nsc:ConstructionInProcessEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value33329143724729523719913917722414389
Percentage of PropertyPlantAndEquipmentNet1.10.91.40.81.00.80.70.50.70.90.60.4
Percentage of Assets0.90.81.20.70.80.70.60.40.60.80.50.3
Percentage of Assets nsc:ConstructionInProcessEquipment0.00.00.00.00.00.00.00.00.00.00.00.0

nsc:ConstructionInProcessRoadway


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value297360442447664686500405378302169174
Percentage of PropertyPlantAndEquipmentNet0.91.11.41.52.22.41.81.51.51.20.70.8
Percentage of Assets0.80.91.21.31.92.01.51.21.21.10.60.6
Percentage of Assets nsc:ConstructionInProcessRoadway0.00.00.00.00.00.00.00.00.00.00.00.0

nsc:FreightCars


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value175718401895197020322015186517961712154213961471
Percentage of PropertyPlantAndEquipmentNet5.65.86.16.56.87.06.76.76.76.36.06.5
Percentage of Assets4.64.95.25.55.85.95.65.55.65.45.05.4
Percentage of Assets nsc:FreightCars0.00.00.00.00.00.00.00.00.00.00.00.0

nsc:Locomotives


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value356738613608350033263165311028962778259524492411
Percentage of PropertyPlantAndEquipmentNet11.412.211.611.511.210.911.210.910.810.610.510.6
Percentage of Assets9.410.210.09.89.59.29.48.99.29.18.78.8
Percentage of Assets nsc:Locomotives0.00.00.00.00.00.00.00.00.00.00.00.0

nsc:OtherRoadway


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value1039410475103351011397359437908988908587829381467919
Percentage of PropertyPlantAndEquipmentNet33.233.133.233.332.732.632.833.433.433.935.135.0
Percentage of Assets27.427.628.528.327.927.527.327.428.329.128.928.9
Percentage of Assets nsc:OtherRoadway0.00.00.00.00.00.00.00.00.00.00.00.0

nsc:Ties


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value408440403898380736973617347233643228304228912803
Percentage of PropertyPlantAndEquipmentNet13.012.812.512.612.412.512.512.612.512.412.412.4
Percentage of Assets10.810.710.810.710.610.610.410.410.610.710.310.2
Percentage of Assets nsc:Ties0.00.00.00.00.00.00.00.00.00.00.00.0

nsc:TotalRoadway


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value222352213921695211662070620192192481858717876170761644715941
Percentage of PropertyPlantAndEquipmentNet70.970.069.869.869.669.669.569.869.569.870.870.4
Percentage of Assets58.658.459.959.359.358.957.957.258.959.858.358.2
Percentage of Assets nsc:TotalRoadway0.00.00.00.00.00.00.00.00.00.00.00.0

srt:OtherProperty


Property
Period End2020-12-312019-12-312018-12-312017-12-31
Value2327170191
Percentage of PropertyPlantAndEquipmentNet0.10.10.50.6
Percentage of Assets0.10.10.50.5
Percentage of Assets srt:OtherProperty0.00.00.00.0

us-gaap:Equipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value669370636889663165196274598355985412497243644301
Percentage of PropertyPlantAndEquipmentNet21.422.322.221.921.921.621.621.021.020.318.819.0
Percentage of Assets17.618.619.018.618.718.318.017.217.817.415.515.7
Percentage of Assets us-gaap:Equipment0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Land


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value239423852337234223302327226022532240220922062181
Percentage of PropertyPlantAndEquipmentNet7.67.57.57.77.88.08.28.58.79.09.59.6
Percentage of Assets6.36.36.46.66.76.86.86.97.47.77.88.0
Percentage of Assets us-gaap:Land0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherMachineryAndEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value695694691638643653603546535
Percentage of PropertyPlantAndEquipmentNet2.22.22.22.12.22.32.22.02.1
Percentage of Assets1.81.81.91.81.81.91.81.71.8
Percentage of Assets us-gaap:OtherMachineryAndEquipment0.00.00.00.00.00.00.00.00.0

us-gaap:RailroadTransportationEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value526151194937476946354523432541523992
Percentage of PropertyPlantAndEquipmentNet16.816.215.915.715.615.615.615.615.5
Percentage of Assets13.913.513.613.413.313.213.012.813.2
Percentage of Assets us-gaap:RailroadTransportationEquipment0.00.00.00.00.00.00.00.00.0

us-gaap:TechnologyEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value3413772582762232042062212101317759
Percentage of PropertyPlantAndEquipmentNet1.11.20.80.90.70.70.70.80.80.50.30.3
Percentage of Assets0.91.00.70.80.60.60.60.70.70.50.30.2
Percentage of Assets us-gaap:TechnologyEquipment0.00.00.00.00.00.00.00.00.00.00.00.0

Long Term Investments

us-gaap:LongTermInvestments

us-gaap:LongTermInvestments


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value36583604359035663590347034283376330131983109310930583020298128882848280927772779263926172572274027242701267926102505246624392395236623412300231522782263223422402235219921932164
Percentage of LongTermInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.49.59.59.39.59.39.09.08.98.68.68.68.58.48.38.28.28.08.08.07.77.77.58.28.28.28.17.97.67.57.57.67.77.77.67.87.87.77.87.97.87.97.87.9

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2020-12-312019-12-312019-09-30
Value433539561
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0
Percentage of Assets1.11.41.5

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value72971870979580578780071475678417739228626725110310582736969676310398130903543423363246363656466617784268257246304316
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.91.91.92.12.12.12.11.92.02.10.51.10.80.70.70.30.30.20.20.20.20.20.20.30.30.40.31.11.01.01.00.20.20.20.20.20.20.30.30.90.90.91.11.2

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1116104310161273126812841428140714071334150513941323121714011287122312111215113110851119109111601144109412331387124511941265126711801188136212601126124310921329125410931181974
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.92.72.73.33.33.43.83.83.83.64.23.83.73.43.93.73.53.43.53.33.23.33.23.53.43.33.74.23.83.73.94.03.93.94.54.23.94.23.84.74.43.94.23.6

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value27962249216020051935223623002761245128852591244123522388254524132343244323392232210718312231236722032103178020822368232123052332181519042081182417741932170119361753156720821789
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.25.95.75.35.16.06.17.46.67.87.16.76.66.67.16.96.77.06.76.46.15.46.57.16.66.45.46.37.27.17.17.45.96.26.96.16.16.66.06.86.25.77.46.5

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2020-12-312019-12-31
Value8997
Percentage of OperatingLeaseLiabilityCurrent100.0100.0
Percentage of Assets0.20.3

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value5363891019498968581181719
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.20.20.30.30.30.30.30.30.10.10.1

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value330344302386343352327401373378246317260304233320252303229333267313237334264298228392331359270377304350263362299337252331284309244232
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.90.90.81.00.90.90.91.11.01.00.70.90.70.80.70.90.70.90.71.00.80.90.71.00.80.90.71.21.01.10.81.21.01.10.91.21.01.10.91.21.01.10.90.8

Taxes Payable Current

us-gaap:TaxesPayableCurrent

us-gaap:TaxesPayableCurrent


Taxes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value302361263257239200229202270338255230269217211206268379245218205299203273295210217301359323225241284319206150322320207221160102199109
Percentage of TaxesPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.81.00.70.70.60.50.60.50.70.90.70.60.80.60.60.60.81.10.70.60.60.90.60.80.90.60.70.91.11.00.70.80.91.00.70.51.11.10.70.80.60.40.70.4

Debt And Capital Lease Obligations

us-gaap:DebtAndCapitalLeaseObligations

us-gaap:DebtAndCapitalLeaseObligations


Debt
Period End2020-12-312019-12-312018-12-31
Value126811219611145
Percentage of DebtAndCapitalLeaseObligations100.0100.0100.0
Percentage of Assets33.432.230.8

Long Term Debt And Capital Lease Obligations

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:LongTermDebtAndCapitalLeaseObligations


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value12669121161210212634126121180711880110851107610569105601063591469637913692809273956995629555954993989393889688908429892489198814890989038499843084388432842879727985739067826931655465676679
Percentage of LongTermDebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets32.731.931.933.133.231.531.329.629.828.529.129.325.626.625.626.426.627.227.427.627.827.827.426.526.725.726.826.926.727.227.427.127.527.627.828.227.327.225.924.024.323.623.324.4

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value70356977692268986874682868156689659665186460646464146367632493679259919991409127904789898942
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets18.218.418.218.118.118.218.017.817.717.617.817.817.917.617.726.626.526.226.226.426.326.626.1

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value19371952198717011680168317441727173817591266130213171352134713661385140714421322135813441385129513221302131210841122113014442166219822262237201820282053205017881795179417931801
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.05.15.24.54.44.54.64.64.74.73.53.63.73.73.83.94.04.04.13.84.04.04.03.94.04.03.93.33.43.54.46.97.27.37.46.86.97.07.26.36.36.56.46.6

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2020-12-312019-12-312018-12-31
Value3444410.0
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.00.0
Percentage of Assets0.91.20.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-312019-12-31
Value76104
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0
Percentage of Assets0.20.3

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-312019-12-31
Value6779
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0
Percentage of Assets0.20.2

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-312019-12-31
Value5870
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0
Percentage of Assets0.20.2

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-312019-12-31
Value5761
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0100.0
Percentage of Assets0.20.2

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-312019-12-31
Value145206
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0100.0
Percentage of Assets0.40.5

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value433538561586593
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0
Percentage of Assets1.11.41.51.61.6

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-312019-12-31
Value504630
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0
Percentage of Assets1.31.7

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-312019-12-31
Value7192
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0
Percentage of Assets0.20.2

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value1431714643147911494114861148841518415238153111533115362154801655916418163591272712409
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets36.938.639.039.139.139.840.040.641.241.442.442.646.345.445.836.235.6

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

nsc:AccumulatedOtherComprehensiveLossEquityInvestees


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-68.0-68.0-68.0-64.0-64.0-65.0-70.0-67.0-67.0-67.0-66.0-56.0-56.0-56.0
Percentage of StockholdersEquity-0.5-0.5-0.5-0.4-0.4-0.4-0.5-0.4-0.4-0.4-0.4-0.4-0.3-0.3
Percentage of Assets-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2
Percentage of Assets nsc:AccumulatedOtherComprehensiveLossEquityInvestees0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-510.0-518.0-526.0-407.0-411.0-416.0-421.0-486.0-490.0-493.0-497.0-379.0-385.0-300.0
Percentage of StockholdersEquity-3.6-3.5-3.6-2.7-2.8-2.8-2.8-3.2-3.2-3.2-3.2-2.4-2.3-1.8
Percentage of Assets-1.3-1.4-1.4-1.1-1.1-1.1-1.1-1.3-1.3-1.3-1.4-1.0-1.1-0.8
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value-578.0-586.0-594.0-471.0-475.0-481.0-491.0-553.0-557.0-560.0-563.0-435.0-441.0-448.0-356.0-487.0
Percentage of StockholdersEquity-4.0-4.0-4.0-3.2-3.2-3.2-3.2-3.6-3.6-3.7-3.7-2.8-2.7-2.7-2.2-3.9
Percentage of Assets-1.5-1.5-1.6-1.2-1.3-1.3-1.3-1.5-1.5-1.5-1.6-1.2-1.2-1.2-1.0-1.4
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value2240224122482246221722052209221922262213221619962263225522542179
Percentage of StockholdersEquity15.615.315.215.014.914.814.514.614.514.414.412.913.713.713.817.6
Percentage of Assets5.85.95.95.95.85.95.85.96.06.06.15.56.36.26.36.2
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value248251254255256258259262265267269274281284285292
Percentage of StockholdersEquity1.71.71.71.71.71.71.71.71.71.71.81.81.71.71.72.4
Percentage of Assets0.60.70.70.70.70.70.70.70.70.70.70.80.80.80.80.8
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value12407127371288312911128631290213207133101337713411134401364514456143271417610425
Percentage of StockholdersEquity86.787.087.186.486.686.787.087.387.487.587.588.187.387.386.784.0
Percentage of Assets32.033.633.933.833.934.534.835.536.036.237.137.640.439.639.729.9
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value22402241224822462217220522092219222622132216199622632255225422492228222821792169214621472143213221462160214821502113208520211979198419761911190919041917191219121951193918921809
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.85.95.95.95.85.95.85.96.06.06.15.56.36.26.36.46.46.36.26.36.36.46.36.46.46.66.56.56.46.46.26.36.56.56.36.46.56.56.76.86.97.06.76.6

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value124071273712883129111286312902132071331013377134111344013645144561432714176106651062410493104251036710269102211019110079100171008710348101569836949093399045895489048643851285448581869387599097909492249027
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets32.033.633.933.833.934.534.835.536.036.237.137.640.439.639.730.330.429.929.929.929.930.329.730.130.130.831.130.629.829.028.828.829.329.128.528.529.329.230.530.931.932.832.733.0

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-31
Value-578000000.0-586000000.0-594000000.0-471000000.0-475000000.0-481000000.0-491000000.0-553000000.0-557000000.0-560000000.0-563000000.0-435000000.0-441000000.0-448000000.0-356000000.0-475000000.0-480000000.0-485000000.0-487000000.0-433000000.0-437000000.0-442000000.0-445000000.0-382000000.0-389000000.0-395000000.0-398000000.0-178000000.0-183000000.0-193000000.0-381000000.0-1040000000.0-1063000000.0-1086000000.0-1109000000.0-971000000.0-991000000.0-1010000000.0-1026000000.0-753000000.0-770000000.0-786000000.0-805000000.0-853000000.0-942000000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-1.5-1.5-1.6-1.2-1.3-1.3-1.3-1.5-1.5-1.5-1.6-1.2-1.2-1.2-1.0-1.4-1.4-1.4-1.4-1.3-1.3-1.3-1.3-1.1-1.2-1.2-1.2-0.5-0.6-0.6-1.2-3.3-3.5-3.5-3.7-3.3-3.4-3.4-3.6-2.7-2.7-2.8-2.9-3.10.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1082101587010098039558951045107188184210581010816788889730846722506909849588674898783723589813628103546310641048652586746624758
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax38.738.533.840.338.536.433.336.836.631.029.135.934.930.029.533.327.732.929.017.630.127.921.923.431.827.926.421.930.221.937.116.636.836.624.924.530.425.733.9

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-327000000.0-202000000.0-357000000.0-278000000.0-307000000.0-233000000.0-441000000.0-471000000.0-502000000.0-350000000.0-517000000.0-355000000.0-415000000.0-371000000.0-307000000.0-350000000.0-420000000.0-404000000.0-502000000.0-748000000.0-607000000.0-393000000.0-254000000.0-525000000.0-562000000.0-441000000.0-366000000.0-542000000.0-520000000.0-496000000.0-436000000.0-567000000.0-404000000.0-419000000.0-382000000.0-450000000.0-275000000.0-371000000.0-360000000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-11.7-7.7-13.9-11.1-14.7-8.9-16.4-16.6-17.2-12.3-17.9-12.0-14.3-13.7-11.5-13.1-15.9-15.7-20.2-26.1-20.1-12.9-9.4-18.2-19.9-15.7-13.4-20.2-19.3-17.3-15.6-20.3-14.0-14.6-14.6-18.8-11.2-15.3-16.1

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-83.0-930.0-757.0-515.039-694.0-414.0-394.0-708.0-478.0-696.0-316.0-1237.0-63.0-515.0-457.0-623.0-443.0-248.0-217.0-537.0-311.0-255.031061-427.0-338.0-87.044-605.0-46.0138-1096.0-187.0-861.0-438.0-197.0-559.0-233.0
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.0-35.2-29.4-20.61.9-26.4-15.4-13.9-24.2-16.8-24.0-10.7-42.7-2.3-19.3-17.1-23.6-17.2-10.0-7.6-17.8-10.2-9.510.82.2-15.2-12.3-3.21.6-21.1-1.64.9-37.9-6.5-32.9-18.3-8.0-23.0-10.4

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value672-117.0-244.02165352840180-139.053-371.0387-642.0382-34.0
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax24.0-4.4-9.58.625.71.11.56.3-4.81.9-12.813.1-22.214.1-1.3

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value55526422451110592765735494445-3078.01055856507657442642123122734.025-8.0477269748714150881131711311121401266.040
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value294292287293282292285287284283282276274272268266
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.095-35.062-66.0-32.0-53.0-64.0-9.039-32.010.06626-18.047-41.053-15.0-25.02.015-157.04823-23.0-48.0-19.01385-59.011-86.0498.0-8.03034-7.03857127-101.01625101
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1082101587010098039558951045107188184210581010816788889730846722506909849588674898783723589813628103546310641048652586746624758
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax38.738.533.840.338.536.433.336.836.631.029.135.934.930.029.533.327.732.929.017.630.127.921.923.431.827.926.421.930.221.937.116.636.836.624.924.530.425.733.9

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value819673671569392381666657722677702702710552
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax29.325.526.122.718.814.524.823.124.723.824.223.824.520.3

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value819673569392381657722677702710552
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax29.325.522.718.814.523.124.723.823.824.520.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-327000000.0-202000000.0-357000000.0-278000000.0-307000000.0-233000000.0-441000000.0-471000000.0-502000000.0-350000000.0-517000000.0-355000000.0-415000000.0-371000000.0-307000000.0-350000000.0-420000000.0-404000000.0-502000000.0-748000000.0-607000000.0-393000000.0-254000000.0-525000000.0-562000000.0-441000000.0-366000000.0-542000000.0-520000000.0-496000000.0-436000000.0-567000000.0-404000000.0-419000000.0-382000000.0-450000000.0-275000000.0-371000000.0-360000000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-11.7-7.7-13.9-11.1-14.7-8.9-16.4-16.6-17.2-12.3-17.9-12.0-14.3-13.7-11.5-13.1-15.9-15.7-20.2-26.1-20.1-12.9-9.4-18.2-19.9-15.7-13.4-20.2-19.3-17.3-15.6-20.3-14.0-14.6-14.6-18.8-11.2-15.3-16.1

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value362265441318369366525515512467625490453383408432445438583372534398608891494392739570428381501586505379719554507461727545465423563338313256
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments To Acquire Investments

us-gaap:PaymentsToAcquireInvestments

us-gaap:PaymentsToAcquireInvestments


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value7.01.05.00.06.00.010.02.06.00.02.02.03.00.02.02.04.0960.0230.02.00.03.01001.00.03.0101222.05.09.02.08.04.04721634.063181105155
Percentage of PaymentsToAcquireInvestments100.0100.0100.00.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.00.0100.00.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-83.0-930.0-757.0-515.039-694.0-414.0-394.0-708.0-478.0-696.0-316.0-1237.0-63.0-515.0-457.0-623.0-443.0-248.0-217.0-537.0-311.0-255.031061-427.0-338.0-87.044-605.0-46.0138-1096.0-187.0-861.0-438.0-197.0-559.0-233.0
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.0-35.2-29.4-20.61.9-26.4-15.4-13.9-24.2-16.8-24.0-10.7-42.7-2.3-19.3-17.1-23.6-17.2-10.0-7.6-17.8-10.2-9.510.82.2-15.2-12.3-3.21.6-21.1-1.64.9-37.9-6.5-32.9-18.3-8.0-23.0-10.4

Payments Of Dividends Common Stock

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value247249238240240242244247228230217219203205174175177177172173174176176177179181176176168167161161158157157159153155144149141142130132
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value93459147929120346654950055050048116004003003003102022002002032002007823235041515266505063250281331383004504004408194493434263231140.0
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value98.1791.5186.6683.1772.5767.961.5754.5247.6141.636.5532.95
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value692268156460632497299510922389608660828177457462
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value452459375322
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value22242117272561656310515294169
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value575450443935333219192114
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nsc:AccessorialServicesPercentOfTotalRailwayOperatingRevenues us-gaap:ProductOrService

nsc:AccessorialServicesPercentOfTotalRailwayOperatingRevenues

nsc:AccessorialServices


Accessorial
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value5.00.050.0500.050.040.0500.0400.04
Percentage of AccessorialServicesPercentOfTotalRailwayOperatingRevenues100.0100.0100.00.0100.0100.0100.00.0100.00.0100.0

nsc:AncillaryServicesPercentOfTotalRailwayOperatingRevenues us-gaap:ProductOrService

nsc:AncillaryServicesPercentOfTotalRailwayOperatingRevenues

nsc:AncillaryServices


Ancillary
Period End2021-06-302021-03-312020-06-302020-03-31
Value6.06.05.05.0
Percentage of AncillaryServicesPercentOfTotalRailwayOperatingRevenues100.0100.0100.0100.0

nsc:CommonStockTransactions

nsc:CommonStockTransactions


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value12-6.0162712146.03.0162.02.02316-1.014338.03424328.0-7.0111.05.0-5.0
Percentage of CommonStockTransactions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nsc:IncomeLossDueToNoncashImpairmentChargesAgainstEquityMethodInvestment us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

nsc:IncomeLossDueToNoncashImpairmentChargesAgainstEquityMethodInvestment

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Income
Period End2020-12-312020-09-30
Value0-74000000.0
Percentage of IncomeLossDueToNoncashImpairmentChargesAgainstEquityMethodInvestment0.0100.0

nsc:ProceedsFromPropertySalesAndOtherTransactions

nsc:ProceedsFromPropertySalesAndOtherTransactions


Proceeds
Period End2021-06-302021-03-312020-06-302020-03-31
Value2937100158
Percentage of ProceedsFromPropertySalesAndOtherTransactions100.0100.0100.0100.0

nsc:ProceedsfromPropertySalesandOtherTransactions

nsc:ProceedsfromPropertySalesandOtherTransactions


Proceedsfrom
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value331001586862152453513
Percentage of ProceedsfromPropertySalesandOtherTransactions100.0100.0100.0100.0100.0100.0100.0100.0100.0

nsc:PurchasedServicesAndRents

nsc:PurchasedServicesAndRents


Purchased
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value429393426486372403460423418424449450430401268377392377399386384379440451438423452429414392406420410393418403392391419403405383391377374335
Percentage of PurchasedServicesAndRents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-1.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses100.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-16.0-17.0-12.0-13.0-13.0-13.0-10.0-11.0-11.0-11.0-15.0-14.0-14.0-14.0-12.0-13.0-13.0-13.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses1600.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-7000000.0-6000000.0-6000000.0-6000000.0-7000000.0-6000000.0-6000000.0-6000000.0-6000000.0-6000000.0-6000000.0-6000000.0-6000000.0-6000000.0-6000000.0-6000000.0-6000000.0-6000000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3.03.04.04.03.03.03.04.03.04.03.04.04.04.03.04.04.04.0
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value484847484748454544454444454443434343
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets1600.01600.01175.01200.01566.71600.01500.01125.01466.71125.01466.71100.01125.01100.01433.31075.01075.01075.0

us-gaap:DefinedBenefitPlanInterestCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2.02.03.03.03.03.04.04.05.04.03.04.04.04.03.04.04.04.0
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value141318191819232423232021222020202020
Percentage of DefinedBenefitPlanInterestCost700.0650.0600.0633.3600.0633.3575.0600.0460.0575.0666.7525.0550.0500.0666.7500.0500.0500.0

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-6.0-5.0-6.0-5.0-5.0-5.0-4.0-4.0-3.0-4.0-5.0-4.0-4.0-4.0-5.0-4.0-4.0-4.0
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-7.0-7.0-6.0-6.0-6.0-6.0-2.0-1.0-2.0-2.01.00.01.00.00.0-1.00.0-1.0
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost116.7140.0100.0120.0120.0120.050.025.066.750.0-20.0-0.0-25.0-0.0-0.025.0-0.025.0

us-gaap:DefinedBenefitPlanServiceCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.02.01.02.02.01.01.02.01.02.01.02.02.02.01.02.02.02.0
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value111110.010.010.010.09.09.08.09.010.09.010.010.010.09.010.09.0
Percentage of DefinedBenefitPlanServiceCost1100.0550.01000.0500.0500.01000.0900.0450.0800.0450.01000.0450.0500.0500.01000.0450.0500.0450.0

us-gaap:Depreciation

us-gaap:Depreciation


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value294292287293282292285286284283281276273272268265264260260259258253289276248246241237240238235231228228234232230226223218215213209206205206
Percentage of Depreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash

us-gaap:DividendsCommonStockCash


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value247249240240242247228230219203205
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value247249240240242247228230219203205
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value8.0175.010.03.0263.03.08.0234.09.06.0147.0134.030162.03.010.01.01.01.010.0-2.02.04.010.02.02.02.0121.0-1.03.0113.01.02.014
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value5.07.05.08.03.0132.01.06.09.02.07.03.04.06.010.03.016
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions us-gaap:AwardType

us-gaap:PerformanceShares


Employee
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value0.01.00.07.07.00.09.09.00.00.03.00.00.01.0
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions0.014.30.0233.353.80.0150.0100.00.00.075.00.00.06.2

us-gaap:RestrictedStockUnitsRSU


Employee
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value0.07.00.00.05.00.00.02.00.00.03.00.00.03.0
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions0.0100.00.00.038.50.00.022.20.00.075.00.00.018.8

us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment

us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment


Equity
Period End2020-12-31
Value0.0
Percentage of EquityMethodInvestmentOtherThanTemporaryImpairment0.0

us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOther


Equity
Period End2020-09-30
Value99
Percentage of EquityMethodInvestmentOtherThanTemporaryImpairment0.0

us-gaap:FuelCosts

us-gaap:FuelCosts


Fuel
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value18817713612684189223226254250275274272266239198190213194181174149194221255264347387408432403390391429395379390413403385412389308259258254
Percentage of FuelCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnDispositionOfAssets1

us-gaap:GainLossOnDispositionOfAssets1


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value678.0253.03.08.038-3.0-11.018145126.08.03042119.08.0315.02.010.02.0135.00.010.01.02.04.01.00.099
Percentage of GainLossOnDispositionOfAssets1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments us-gaap:FinancialInstrument

us-gaap:IncomeLossFromEquityMethodInvestments

nsc:ConrailInc


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value14141917139.01713158.09.01218164510.010.010.01511119.01310.0
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nsc:TTXCompany


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value1417132110.04.014191213121617161261410.08.08.05.05.06.07.02.0
Percentage of IncomeLossFromEquityMethodInvestments100.0121.468.4123.576.944.482.4146.280.0162.5133.3133.394.4100.0280.0140.0100.080.053.345.545.566.753.820.0

us-gaap:IncreaseDecreaseInMaterialsAndSupplies

us-gaap:IncreaseDecreaseInMaterialsAndSupplies


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value5.020-26.0-10.0-8.021-22.010.02821-60.07.01523-23.0-44.08.024-72.0-5.0-9.044-17.0119.032-13.0-2.01117-1.0-4.0-18.030-20.0-6.01419-3.0111121-10.00.0
Percentage of IncreaseDecreaseInMaterialsAndSupplies100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:IncreaseDecreaseInOtherCurrentAssets

us-gaap:IncreaseDecreaseInOtherCurrentAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-21.0-9.052-25.0-63.0334415-43.0-12.091-26.0-6.0-13.0139-20.0-17.0-31.048-27.0-19.0-84.0103-13.0-106.0-176.0307-17.0-13.0-17.053-20.0-11.0-17.049-20.0-18.0-5.046-24.0-17.0-19.051-14.0
Percentage of IncreaseDecreaseInOtherCurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value12158-70.010440-40.0-113.0-42.0-3.0-27.0503912212-30.072-95.01889.0124-175.0200-242.06096-97.0-205.01145886-116.0115-90.096-101.021-154.0316-334.018119427-128.01827209
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LaborAndRelatedExpense

us-gaap:LaborAndRelatedExpense


Labor
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value624611587578586622630682712727757725706737714755703743662691667723702702724783714728715740761735726780726724724786734736739765659680670699
Percentage of LaborAndRelatedExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OciBeforeReclassificationsBeforeTaxAttributableToParent

us-gaap:OciBeforeReclassificationsBeforeTaxAttributableToParent


Oci
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-129.00.01.05.0580.00.0-1.0-135.00.0
Percentage of OciBeforeReclassificationsBeforeTaxAttributableToParent100.00.0100.0100.0100.00.00.0100.0100.00.0

us-gaap:OciBeforeReclassificationsBeforeTaxAttributableToParent us-gaap:StatementEquityComponents

nsc:AccumulatedOtherComprehensiveLossEquityInvestees


Oci
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-4.00.01.05.0-3.00.00.0-1.0-10.00.0
Percentage of OciBeforeReclassificationsBeforeTaxAttributableToParent3.10.0100.0100.0-5.20.00.0100.07.40.0

us-gaap:OtherComprehensiveIncomeLossBeforeTax

us-gaap:OtherComprehensiveIncomeLossBeforeTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value10.011-164.07.07.012835.05.04.0-168.08.09.0-6.01547.08.05.0-89.07.07.06.0-103.010.0116.0-347.08.0143021052383737-220.0333228-431.02829
Percentage of OtherComprehensiveIncomeLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeTax us-gaap:StatementEquityComponents

nsc:AccumulatedOtherComprehensiveLossEquityInvestees


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.01.05.0-3.00.00.0-1.0-11.00.01.01.0200.01.0-2.05.00.01.0-1.0
Percentage of OtherComprehensiveIncomeLossBeforeTax0.014.341.7-3.60.00.0-25.06.50.011.1-16.713.00.012.5-40.0-5.60.014.3-16.7

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-10.0-11.0160-7.0-6.0-7.0-86.0-5.0-5.0-5.0157-8.0-8.07.0-134.0-7.0-7.0-7.094-7.0-6.0-7.0107-10.0-11.0-10.0329-8.0-7.0-299.01232-38.0-36.0-36.0-17.0-33.0-32.0-32.0-240.0-28.0-29.0
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossTax

us-gaap:OtherComprehensiveIncomeLossTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value2.03.0-41.03.01.02.0211.02.01.0-40.02.02.0-35.03.02.03.0-40.03.05.03.0-127.03.04.0114-479.01514146.01313129211139.0
Percentage of OtherComprehensiveIncomeLossTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherCostAndExpenseOperating

us-gaap:OtherCostAndExpenseOperating


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value9715115318315116613022819219056202191206167164200210215188202194
Percentage of OtherCostAndExpenseOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:OtherOperatingActivitiesCashFlowStatement


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-46.0-46.0-66.0-48.0-90.0-44.0-41.09.0-43.0-43.0-83.0-5.0-59.0-21.0-212.0-35.0-34.0-36.0-44.0-65.0-13.0-28.0-35.0-55.07.0-28.0-68.0-33.0-24.0-9.0-8.0-14.0-4.036-5.0-15.05.04419-5.02.0104-93.0-12.0
Percentage of OtherOperatingActivitiesCashFlowStatement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic

us-gaap:ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic


Participating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value01000000.002000000.001000000.01000000.01000000.02000000.01000000.02000000.02000000.01000000.01000000.01000000.01000000.01000000.01000000.003000000.01000000.01000000.01000000.02000000.01000000.02000000.0
Percentage of ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic0.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted

us-gaap:ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted


Participating
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value01000000.001000000.000000001000000.01000000.0001000000.002000000.01000000.01000000.02000000.01000000.01000000.01000000.0
Percentage of ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted0.0100.00.0100.00.00.00.00.00.00.00.0100.0100.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForProceedsFromOtherInvestingActivities


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-11.0-26.0-49.0-8.033255.0244233-3.0-90.0-5.0-1.0-39.0-5.0-2.0-1.0-42.0-3.0-2.0-1.0-208.0-27.0-4.0-1.0-46.061-13.0-108.0-42.0-5.0-17.01.0-41.0-4.0-6.0-27.0-193.0-112.0-79.0-55.0-160.0-184.0-26.0-51.0
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromDebtNetOfIssuanceCosts

us-gaap:ProceedsFromDebtNetOfIssuanceCosts


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value0.00.07840.07883508042500.014800.0543-3.0-5.02980.01000.05911001001004974920.00.02005950.06967050.03960.0100
Percentage of ProceedsFromDebtNetOfIssuanceCosts0.00.0100.00.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.00.00.0100.0100.00.0100.0100.00.0100.00.0100.0

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProceedsFromStockOptionsExercised


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1219162712436.03.016282.023161714338.0492816409.018351910.01115253252111421
Percentage of ProceedsFromStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-8000000.0-8000000.0-6000000.0-4000000.0-5000000.0-5000000.0-4000000.0-4000000.0-3000000.0-4000000.0-7000000.0-6000000.0
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-8000000.0-8000000.0-6000000.0-4000000.0-5000000.0-5000000.0-4000000.0-4000000.0-3000000.0-4000000.0-7000000.0-6000000.0
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty us-gaap:FinancialInstrument

us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty

nsc:ConrailInc


Related
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value3734323230353737383738383638353437353838363938394037
Percentage of RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nsc:TTXCompany


Related
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value6163675860616062436766645858575956565857565353
Percentage of RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty164.9185.3209.4193.3171.4164.9157.9167.6113.2186.1173.7182.9170.6156.8162.9155.3147.4155.6148.7150.0143.6132.5143.2

us-gaap:RelatedPartyTransactionRate us-gaap:FinancialInstrument

us-gaap:RelatedPartyTransactionRate

nsc:ConrailInc


Related
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value01.31-1.592.87100.0290000.0290000.0290000.0290000.029
Percentage of RelatedPartyTransactionRate0.0100.0100.0100.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.0

us-gaap:RepaymentsOfDebtAndCapitalLeaseObligations

us-gaap:RepaymentsOfDebtAndCapitalLeaseObligations


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value1.08456114380.07500.00.00.0650100520.05501000.00.00.06000.00.01.01010.04321131002.032132034.0122182188.01543040812
Percentage of RepaymentsOfDebtAndCapitalLeaseObligations100.0100.0100.0100.0100.00.0100.00.00.00.0100.0100.0100.00.0100.0100.00.00.00.0100.00.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:PerformanceShares


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-06-302016-03-31
Value274.17240.61-0.010184.47213.380.55168.73189.5797.750103.36091.550.4119.73116.4886.9184.052.55
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-03-312013-03-312012-09-30
Value283.6238.03-0.02211.9173.56210.770.27176.4203.25163.330172.19147.58148.3200117.75120.2589.4870.3269.830
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue103.498.9200.00.094.198.849.1104.5107.2167.10.0166.60.0162.00.00.0101.1138.40.0133.80.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-09-302020-06-302019-09-302019-06-302018-09-302018-06-302017-09-302017-06-302017-03-312016-09-302016-03-312015-03-31
Value062.49039.140.9854.83000037.7319.9219.9230.35
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.0100.00.0100.0100.0100.00.00.00.00.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2811382217133319322716
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2712402217143519332817
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation96.4109.1105.3100.0100.0107.7106.1100.0103.1103.7106.2

us-gaap:RetainedEarnings


Stock
Period End2021-06-302021-03-312020-09-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value1.0-1.0-2.0-1.0-1.0-2.0-1.0-2.0-1.0-2.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation3.6-9.1-5.3-5.9-7.7-6.1-5.3-6.2-3.7-12.5

us-gaap:StockRepurchasedAndRetiredDuringPeriodShares

us-gaap:StockRepurchasedAndRetiredDuringPeriodShares


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3.42.32.11.41.32.62.92.72.82.94.38.02.72.12.22.61.71.72.02.22.42.61.02.93.53.91.40.70.50.50.83.33.70.52.34.26.65.76.4126.35.36.95.82.00.0
Percentage of StockRepurchasedAndRetiredDuringPeriodShares100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value93459147929120346649950055050070016004003003003102022002002032002001032323504151526650506325028133883504504004518084493434263231140.0
Percentage of StockRepurchasedAndRetiredDuringPeriodValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value28191110.0212122223002016
Percentage of StockRepurchasedAndRetiredDuringPeriodValue3.03.23.84.94.54.24.04.418.85.05.3

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value3.03.01.02.02.03.02.03.08.03.02.0
Percentage of StockRepurchasedAndRetiredDuringPeriodValue0.30.50.31.00.40.60.40.60.50.80.7

us-gaap:RetainedEarnings


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value9035692791914434765264751292377282
Percentage of StockRepurchasedAndRetiredDuringPeriodValue96.796.395.994.195.195.295.695.080.894.294.0

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312011-03-312010-03-31
Value1100000.01200000.01500000.01300000.01400000.02200000.02300000.02300000.02700000.02400000.02400000.02400000.02200000.02500000.02000000.01900000.01700000.02400000.02600000.02800000.05300000.05400000.0
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

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

nsc:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRateForInterestCost

us-gaap:UnfundedPlan, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2.690.03830.03130.03140.0315
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRateForInterestCost100.0100.0100.0100.0100.0

us-gaap:UnfundedPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2.920.03990.03330.03430.0351
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRateForInterestCost108.6104.2106.4109.2111.4

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

nsc:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRateForServiceCost

us-gaap:UnfundedPlan, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value3.410.04390.03830.04170.0436
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRateForServiceCost100.0100.0100.0100.0100.0

us-gaap:UnfundedPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value3.710.04550.04010.04310.0464
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRateForServiceCost108.8103.6104.7103.4106.4

nsc:EnvironmentalLocationsRepresentativeSampleLiability

nsc:EnvironmentalLocationsRepresentativeSampleLiability


Environmental
Period End2021-06-302021-03-312020-12-312020-09-30
Value36384041
Percentage of EnvironmentalLocationsRepresentativeSampleLiability100.0100.0100.0100.0

nsc:LongTermPurchaseCommitmentFutureAccessDueRelatedPartyTransactionYearFour us-gaap:InvestmentType

nsc:LongTermPurchaseCommitmentFutureAccessDueRelatedPartyTransactionYearFour

us-gaap:FixedMaturities


Long
Period End2020-12-31
Value17
Percentage of LongTermPurchaseCommitmentFutureAccessDueRelatedPartyTransactionYearFour100.0

nsc:LongTermPurchaseCommitmentFutureAccessFeesDueRelatedPartyTransactionYearOne

nsc:LongTermPurchaseCommitmentFutureAccessFeesDueRelatedPartyTransactionYearOne


Long
Period End2020-12-31
Value41
Percentage of LongTermPurchaseCommitmentFutureAccessFeesDueRelatedPartyTransactionYearOne100.0

nsc:LongTermPurchaseCommitmentFutureAccessFeesDueRelatedPartyTransactionYearThree us-gaap:InvestmentType

nsc:LongTermPurchaseCommitmentFutureAccessFeesDueRelatedPartyTransactionYearThree

us-gaap:FixedMaturities


Long
Period End2020-12-31
Value41
Percentage of LongTermPurchaseCommitmentFutureAccessFeesDueRelatedPartyTransactionYearThree100.0

nsc:LongTermPurchaseCommitmentFutureAccessFeesDueRelatedPartyTransactionYearTwo

nsc:LongTermPurchaseCommitmentFutureAccessFeesDueRelatedPartyTransactionYearTwo


Long
Period End2020-12-31
Value41
Percentage of LongTermPurchaseCommitmentFutureAccessFeesDueRelatedPartyTransactionYearTwo100.0

nsc:PortionOfPotentialLossesWithinASpecifiedRangeCoveredByThirdPartyInsurerAsAPercentage

nsc:PortionOfPotentialLossesWithinASpecifiedRangeCoveredByThirdPartyInsurerAsAPercentage


Portion
Period End2021-06-302021-03-312020-09-30
Value87.085.085.0
Percentage of PortionOfPotentialLossesWithinASpecifiedRangeCoveredByThirdPartyInsurerAsAPercentage100.0100.0100.0

nsc:SelfInsuredPercentageOfPotentialLossesCovered

nsc:SelfInsuredPercentageOfPotentialLossesCovered


Self
Period End2020-12-31
Value85.0
Percentage of SelfInsuredPercentageOfPotentialLossesCovered100.0

nsc:TrustOwnedLifeInsuranceFairValue us-gaap:FairValueByFairValueHierarchyLevel

nsc:TrustOwnedLifeInsuranceFairValue

us-gaap:FairValueInputsLevel2


Trust
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value165170158201182189262239205186
Percentage of TrustOwnedLifeInsuranceFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsPayableOtherCurrent

us-gaap:AccountsPayableOtherCurrent


Accounts
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value1051061221131101091109795302522
Percentage of AccountsPayableOtherCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableNetNoncurrent us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:AccountsReceivableNetNoncurrent

nsc:OtherNoncurrentReceivables


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2323232323232323555555
Percentage of AccountsReceivableNetNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TradeAccountsReceivable


Accounts
Period End2020-12-312019-12-312018-12-31
Value232355
Percentage of AccountsReceivableNetNoncurrent100.0100.0100.0

us-gaap:AccrualForEnvironmentalLossContingencies

us-gaap:AccrualForEnvironmentalLossContingencies


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value5051545554565660635855595856586265676764666869707069666665575859534842343638353233323332
Percentage of AccrualForEnvironmentalLossContingencies100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccrualForEnvironmentalLossContingenciesUndiscountedDueWithinOneYear

us-gaap:AccrualForEnvironmentalLossContingenciesUndiscountedDueWithinOneYear


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1515151515151515151515151515151515151515151515151515151515151512121212121212121212121212
Percentage of AccrualForEnvironmentalLossContingenciesUndiscountedDueWithinOneYear100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedSalariesCurrent

us-gaap:AccruedSalariesCurrent


Accrued
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value552710828822650
Percentage of AccruedSalariesCurrent100.0100.0100.0100.0100.0

us-gaap:AccruedVacationCurrent

us-gaap:AccruedVacationCurrent


Accrued
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value121136140133134135132130129123122123
Percentage of AccruedVacationCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AllowanceForDoubtfulAccountsReceivable


Allowance
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value6000000.09000000.07000000.07000000.04000000.03000000.06000000.03000000.03000000.04000000.05000000.05000000.0
Percentage of AllowanceForDoubtfulAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsHeldForSaleNotPartOfDisposalGroup us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AssetsHeldForSaleNotPartOfDisposalGroup

us-gaap:RailroadTransportationEquipment


Assets
Period End2020-09-30
Value20
Percentage of AssetsHeldForSaleNotPartOfDisposalGroup100.0

us-gaap:CashSurrenderValueOfLifeInsurance

us-gaap:CashSurrenderValueOfLifeInsurance


Cash
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value902767556530415308470289264
Percentage of CashSurrenderValueOfLifeInsurance100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockValueOutstanding

us-gaap:CommonStockValueOutstanding


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value248251254255256258259262265267269274281284285288290291292293295297299300303306310311311311310310313316315317321327332337349354358370
Percentage of CommonStockValueOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet


Debt
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1012809839848486505
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet100.0100.0100.0100.0100.0100.0

us-gaap:DebtLongtermAndShorttermCombinedAmount us-gaap:DebtInstrument

us-gaap:DebtLongtermAndShorttermCombinedAmount

nsc:FourPointOneOnePercentMaturing2037To2055


Debt
Period End2020-12-312019-12-31
Value74975904
Percentage of DebtLongtermAndShorttermCombinedAmount100.0100.0

nsc:SixPointZeroSevenPercentMaturing2097To2118


Debt
Period End2020-12-312019-12-31
Value7841331
Percentage of DebtLongtermAndShorttermCombinedAmount10.522.5

nsc:ThreePointSixFivePercentMaturingTo2025


Debt
Period End2020-12-312019-12-31
Value26733048
Percentage of DebtLongtermAndShorttermCombinedAmount35.751.6

us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent

us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value107104106113112117116120118119124130
Percentage of DeferredCompensationLiabilityClassifiedNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value73747274683566469729
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value5095134253666286036066301014957823871
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value19820272676265455441415046
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value218222284235464430454462834771617661
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value93896964102108107114139145156
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value554560413434428438455466472387292267
Percentage of DeferredTaxLiabilitiesOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value682067146422621293019072876884948188789474537195
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPensionPlanLiabilitiesCurrent us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPensionPlanLiabilitiesCurrent

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1918181716
Percentage of DefinedBenefitPensionPlanLiabilitiesCurrent100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPensionPlanLiabilitiesNoncurrent us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPensionPlanLiabilitiesNoncurrent

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value306287308309346
Percentage of DefinedBenefitPensionPlanLiabilitiesNoncurrent100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value340302278296333
Percentage of DefinedBenefitPensionPlanLiabilitiesNoncurrent111.1105.290.395.896.2

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value260023002200230022002200220019002100190017001600
Percentage of DefinedBenefitPlanAccumulatedBenefitObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-228000000.0-253000000.0-259000000.0-283000000.0-307000000.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-306.0-287.0-308.0-309.0-346.0
Percentage of DefinedBenefitPlanAmountsRecognizedInBalanceSheet100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-170.0-126.0-266.0-168.0-347.0
Percentage of DefinedBenefitPlanAmountsRecognizedInBalanceSheet55.643.986.454.4100.3

us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value189194301452.0
Percentage of DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate us-gaap:RetirementPlanFundingStatus, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

us-gaap:FundedPlan, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value2.270.03130.04180.03570.03830.0402
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate100.0100.0100.0100.0100.0100.0

us-gaap:FundedPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value2.670.03380.04330.03740.04050.043
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate117.6108.0103.6104.8105.7107.0

us-gaap:DefinedBenefitPlanBenefitObligation us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanBenefitObligation

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value471457466510528536
Percentage of DefinedBenefitPlanBenefitObligation100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value284525882371254124202372
Percentage of DefinedBenefitPlanBenefitObligation604.0566.3508.8498.2458.3442.5

us-gaap:DefinedBenefitPlanExpectedAmortizationNextFiscalYear us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedAmortizationNextFiscalYear

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value66
Percentage of DefinedBenefitPlanExpectedAmortizationNextFiscalYear100.0

us-gaap:DefinedBenefitPlanExpectedAmortizationOfPriorServiceCostCreditNextFiscalYear us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedAmortizationOfPriorServiceCostCreditNextFiscalYear

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-31
Value-23000000.0
Percentage of DefinedBenefitPlanExpectedAmortizationOfPriorServiceCostCreditNextFiscalYear100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value142148165169
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value719719733731
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter506.3485.8444.2432.5

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value36374142
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value147144142143
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths408.3389.2346.3340.5

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value31323637
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value144144146145
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive464.5450.0405.6391.9

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value32333738
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value145144145144
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour453.1436.4391.9378.9

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value33343840
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value145144144143
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree439.4423.5378.9357.5

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value35364041
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value146144143143
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo417.1400.0357.5348.8

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value36374143
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value19181817
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear52.848.643.939.5

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

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets

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


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1491219223379
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.0100.0100.0100.0100.0

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


Defined
Period End2020-12-312019-12-312018-12-31
Value242662
Percentage of DefinedBenefitPlanFairValueOfPlanAssets16.121.567.4

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


Defined
Period End2020-12-312019-12-312018-12-31
Value1178483
Percentage of DefinedBenefitPlanFairValueOfPlanAssets78.569.490.2

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


Defined
Period End2020-12-312019-12-312018-12-31
Value605072
Percentage of DefinedBenefitPlanFairValueOfPlanAssets40.341.378.3

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


Defined
Period End2020-12-312019-12-312018-12-31
Value297303287
Percentage of DefinedBenefitPlanFairValueOfPlanAssets199.3250.4312.0

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


Defined
Period End2020-12-312019-12-312018-12-31
Value148313291106
Percentage of DefinedBenefitPlanFairValueOfPlanAssets995.31098.31202.2

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


Defined
Period End2020-12-312019-12-312018-12-31
Value399377314
Percentage of DefinedBenefitPlanFairValueOfPlanAssets267.8311.6341.3

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


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value146172894.04.0
Percentage of DefinedBenefitPlanFairValueOfPlanAssets98.0142.196.71.75.1

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:FairValueByMeasurementFrequency

nsc:CommingledFunds, us-gaap:FairValueMeasurementsRecurring


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1491219223379
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.0100.0100.0100.0100.0

us-gaap:AssetBackedSecurities, us-gaap:FairValueMeasurementsRecurring


Defined
Period End2020-12-312019-12-312018-12-31
Value242662
Percentage of DefinedBenefitPlanFairValueOfPlanAssets16.121.567.4

us-gaap:CorporateDebtSecurities, us-gaap:FairValueMeasurementsRecurring


Defined
Period End2020-12-312019-12-312018-12-31
Value1178483
Percentage of DefinedBenefitPlanFairValueOfPlanAssets78.569.490.2

us-gaap:DefinedBenefitPlanCashAndCashEquivalents, us-gaap:FairValueMeasurementsRecurring


Defined
Period End2020-12-312019-12-312018-12-31
Value605072
Percentage of DefinedBenefitPlanFairValueOfPlanAssets40.341.378.3

us-gaap:DefinedBenefitPlanDebtSecurity, us-gaap:FairValueMeasurementsRecurring


Defined
Period End2020-12-312019-12-312018-12-31
Value297303287
Percentage of DefinedBenefitPlanFairValueOfPlanAssets199.3250.4312.0

us-gaap:DefinedBenefitPlanEquitySecuritiesCommonStock, us-gaap:FairValueMeasurementsRecurring


Defined
Period End2020-12-312019-12-312018-12-31
Value148313291106
Percentage of DefinedBenefitPlanFairValueOfPlanAssets995.31098.31202.2

us-gaap:DefinedBenefitPlanEquitySecuritiesNonUs, us-gaap:FairValueMeasurementsRecurring


Defined
Period End2020-12-312019-12-312018-12-31
Value399377314
Percentage of DefinedBenefitPlanFairValueOfPlanAssets267.8311.6341.3

us-gaap:USGovernmentAgenciesDebtSecurities, us-gaap:FairValueMeasurementsRecurring


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value146172894.04.0
Percentage of DefinedBenefitPlanFairValueOfPlanAssets98.0142.196.71.75.1

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value15431379117811771185
Percentage of DefinedBenefitPlanFairValueOfPlanAssets1035.61139.71280.4505.21500.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value113210839271196888
Percentage of DefinedBenefitPlanFairValueOfPlanAssets759.7895.01007.6513.31124.1

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value26752462210523732073
Percentage of DefinedBenefitPlanFairValueOfPlanAssets1795.32034.72288.01018.52624.1

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value165170158201182189
Percentage of DefinedBenefitPlanFairValueOfPlanAssets110.7140.5171.786.3230.40.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value267524622105237320732040
Percentage of DefinedBenefitPlanFairValueOfPlanAssets1795.32034.72288.01018.52624.10.0

us-gaap:DefinedBenefitPlanFundedStatusOfPlan us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanFundedStatusOfPlan

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-306.0-287.0-308.0-309.0-346.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-170.0-126.0-266.0-168.0-347.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan55.643.986.454.4100.3

us-gaap:DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value6.0
Percentage of DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear100.0

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value330292263267252252244206215195177159
Percentage of DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value359320296313286274274231239219197181
Percentage of DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanPlanAssetsInvestmentWithinPlanAssetCategoryPercentage us-gaap:DefinedBenefitPlanByPlanAssetCategories

us-gaap:DefinedBenefitPlanPlanAssetsInvestmentWithinPlanAssetCategoryPercentage

us-gaap:DefinedBenefitPlanDebtSecurity


Defined
Period End2020-12-312019-12-312018-12-31
Value32.00.330.36
Percentage of DefinedBenefitPlanPlanAssetsInvestmentWithinPlanAssetCategoryPercentage100.0100.0100.0

us-gaap:DefinedBenefitPlanPlanAssetsInvestmentWithinPlanAssetCategoryPercentage us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanEquitySecurities, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value68.00.670.64
Percentage of DefinedBenefitPlanPlanAssetsInvestmentWithinPlanAssetCategoryPercentage212.5203.0177.8

us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage us-gaap:Range

us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage

srt:Maximum


Defined
Period End2020-12-312019-12-31
Value75.00.75
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage100.0100.0

srt:Minimum


Defined
Period End2020-12-312019-12-31
Value50.00.5
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage66.766.7

us-gaap:DefinedBenefitPlanUltimateHealthCareCostTrendRate1 us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanUltimateHealthCareCostTrendRate1

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value5.0
Percentage of DefinedBenefitPlanUltimateHealthCareCostTrendRate1100.0

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations

us-gaap:DefinedBenefitPlanCashAndCashEquivalents, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value2.00.020.030.02
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanDebtSecurity, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value22.00.240.250.24
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations1100.01200.0833.31200.0

us-gaap:DefinedBenefitPlanEquitySecuritiesNonUs, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value24.00.240.230.25
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations1200.01200.0766.71250.0

us-gaap:DefinedBenefitPlanEquitySecuritiesUs, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value52.00.50.490.49
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations2600.02500.01633.32450.0

us-gaap:DueToAffiliateCurrent us-gaap:FinancialInstrument

us-gaap:DueToAffiliateCurrent

nsc:ConrailInc


Due
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value562642021461291181098571
Percentage of DueToAffiliateCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DueToAffiliateNoncurrent us-gaap:FinancialInstrument

us-gaap:DueToAffiliateNoncurrent

nsc:ConrailInc


Due
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value534534534280280280280280280280280280280280280280280280280280280280280
Percentage of DueToAffiliateNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized


Employee
Period End2020-12-312019-12-31
Value5.06.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType

us-gaap:EmployeeStockOption


Employee
Period End2020-12-31
Value1.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized20.0

us-gaap:RestrictedStockUnitsRSU


Employee
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2925178.07.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized580.0416.70.00.00.0

us-gaap:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity us-gaap:FinancialInstrument

us-gaap:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity

nsc:ConrailInc


Equity
Period End2020-12-31
Value494
Percentage of EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity100.0

us-gaap:EquityMethodInvestmentOwnershipPercentage us-gaap:FinancialInstrument

us-gaap:EquityMethodInvestmentOwnershipPercentage

nsc:AffiliateVoting


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value50.050.050.050.00.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.5
Percentage of EquityMethodInvestmentOwnershipPercentage100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nsc:TTXCompany


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value19.6519.6519.6519.650.19650.19650.19650.19650.19650.19650.19650.19650.19650.19650.19650.19650.19650.19650.19650.19650.19650.1965
Percentage of EquityMethodInvestmentOwnershipPercentage39.339.339.339.339.339.339.339.339.339.339.339.339.339.339.339.339.339.339.339.339.339.3

us-gaap:EquityMethodInvestee


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value58.058.058.058.00.580.580.580.580.580.580.580.580.580.580.580.580.580.580.580.580.580.58
Percentage of EquityMethodInvestmentOwnershipPercentage116.0116.0116.0116.0116.0116.0116.0116.0116.0116.0116.0116.0116.0116.0116.0116.0116.0116.0116.0116.0116.0116.0

us-gaap:EquityMethodInvestments

us-gaap:EquityMethodInvestments


Equity
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value266226462532242521762102204720021897185317991753
Percentage of EquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestments us-gaap:FinancialInstrument

nsc:ConrailInc


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value15001500144614001400140013871400140013001337130013001300129312001200120011991200120012001100
Percentage of EquityMethodInvestments0.00.054.30.00.00.052.40.00.00.052.80.00.00.053.30.00.00.055.10.00.00.052.3

nsc:TTXCompany


Equity
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value798749692629471445
Percentage of EquityMethodInvestments30.028.327.325.921.621.2

us-gaap:OtherLongTermInvestments


Equity
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value4188577777783
Percentage of EquityMethodInvestments15.73.23.03.23.53.9

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiability


Finance
Period End2020-12-312019-12-31
Value258.0
Percentage of FinanceLeaseLiability100.0100.0

us-gaap:InterestPayableCurrent

us-gaap:InterestPayableCurrent


Interest
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value141149139115119123118121112106108106
Percentage of InterestPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2020-12-312019-12-31
Value101110
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity us-gaap:ShortTermDebtType

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

nsc:AmendedSecuritizationBorrowingsProgram


Line
Period End2020-12-31
Value400
Percentage of LineOfCreditFacilityRemainingBorrowingCapacity100.0

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value104850157989854003164014015855855005006006006006005505505505500.05005005005012.02.043344544544747475052273250555563358374
Percentage of LongTermDebtAndCapitalLeaseObligationsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtFairValue us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:LongTermDebtFairValue

us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value13717126171268112723126971220712196114861147711154111451113596469736
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1692415249166641658216362146301480614131136381269812203123971089411771
Percentage of LongTermDebtFairValue123.4120.9131.4130.3128.9119.8121.4123.0118.8113.8109.5111.3112.9120.9

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive


Long
Period End2020-12-31
Value9988
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive


Long
Period End2020-12-31
Value555
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour


Long
Period End2020-12-31
Value403
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree


Long
Period End2020-12-31
Value603
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo


Long
Period End2020-12-31
Value553
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo100.0

us-gaap:LongtermDebtWeightedAverageInterestRate us-gaap:DebtInstrument

us-gaap:LongtermDebtWeightedAverageInterestRate

nsc:FourPointOneOnePercentMaturing2037To2055


Longterm
Period End2020-12-31
Value4.11
Percentage of LongtermDebtWeightedAverageInterestRate100.0

nsc:FourPointThreeTwoPercentMaturing2026To3031


Longterm
Period End2020-12-31
Value4.32
Percentage of LongtermDebtWeightedAverageInterestRate105.1

nsc:SixPointZeroSevenPercentMaturing2097To2118


Longterm
Period End2020-12-31
Value6.07
Percentage of LongtermDebtWeightedAverageInterestRate147.7

nsc:ThreePointSixFivePercentMaturingTo2025


Longterm
Period End2020-12-31
Value3.65
Percentage of LongtermDebtWeightedAverageInterestRate88.8

us-gaap:LossContingencyAccrualCarryingValueCurrent

us-gaap:LossContingencyAccrualCarryingValueCurrent


Loss
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value182212213187192174187
Percentage of LossContingencyAccrualCarryingValueCurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:LossContingencyAccrualCarryingValueNoncurrent

us-gaap:LossContingencyAccrualCarryingValueNoncurrent


Loss
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value169171158179178191199
Percentage of LossContingencyAccrualCarryingValueNoncurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:MaterialsSuppliesAndOther

us-gaap:MaterialsSuppliesAndOther


Materials
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value246241221247257265244266256228207267260245222245289281257301306315271288277268236
Percentage of MaterialsSuppliesAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2020-12-312019-12-31
Value3.53.52
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0

us-gaap:OtherAccruedLiabilitiesNoncurrent

us-gaap:OtherAccruedLiabilitiesNoncurrent


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value187159136170193132148193315146159180
Percentage of OtherAccruedLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherInvestments

us-gaap:OtherInvestments


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value26152126186162162148139136137137
Percentage of OtherInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:PerformanceShares


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value171.34114.0462.7763.3661.1771.09
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value148.29127.77111.8787.480.6878.14
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue86.5112.0178.2137.9131.9109.9

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice


Share
Period End2020-12-31
Value87.75
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue


Share
Period End2020-12-31
Value213
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1


Sharebased
Period End2020-12-31
Value183
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1100.0

us-gaap:StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased

us-gaap:StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased


Stock
Period End2020-12-31
Value20
Percentage of StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased100.0

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate


Unrecognized
Period End2020-12-31
Value17
Percentage of UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate100.0

us-gaap:ValuationAllowancesAndReservesBalance us-gaap:ValuationAllowancesAndReservesType

us-gaap:ValuationAllowancesAndReservesBalance

nsc:AccountsPayableCasualtyAndOtherClaimsCurrent


Valuation
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value182212213187192174187166183201254233248259
Percentage of ValuationAllowancesAndReservesBalance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nsc:OtherLiabilitiesCasualtyAndOtherClaims


Valuation
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value169171158179178191199214258275261265320588
Percentage of ValuationAllowancesAndReservesBalance92.980.774.295.792.7109.8106.4128.9141.0136.8102.8113.7129.0227.0

Line plots across dimensions of each concept


TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
(None, 'nsc:RailwayOperatingRevenuesMarketGroupMerchandise')
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service, us-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:StatementBusinessSegments
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Statement Business Segments
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:AccountsReceivableNetCurrent
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
(None,)
Accounts Receivable Net Currentus-gaap: Accounts Notes Loans And Financing Receivable By Receivable Type
us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Property Plant And Equipment Grossus-gaap: Property Plant And Equipment By Type
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Accumulated Depreciation Depletion And Amortization Property Plant And Equipmentus-gaap: Property Plant And Equipment By Type
us-gaap:PropertyPlantAndEquipmentNet
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Property Plant And Equipment Netus-gaap: Property Plant And Equipment By Type
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components