NOV


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

Table of contents


us-gaap:StatementEquityComponents
us-gaap:SharesIssued

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:PlanName

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:CostOfGoodsAndServicesSold
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:CostOfRevenue

us-gaap:GainsLossesOnExtinguishmentOfDebt
us-gaap:DebtInstrument
us-gaap:StatementScenario, us-gaap:LongtermDebtType

us-gaap:GrossProfit

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:IncomeTaxesPaidNet

us-gaap:InterestExpense

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:OperatingIncomeLoss
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments, us-gaap:Subsegments, us-gaap:SubsegmentsConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:ConsolidationItems, us-gaap:StatementGeographical, us-gaap:Subsegments
us-gaap:ConsolidationItems, us-gaap:Subsegments, us-gaap:SubsegmentsConsolidationItems
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:StatementBusinessSegments
us-gaap:StatementGeographical, us-gaap:Subsegments

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:Assets
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:ReceivablesNetCurrent

us-gaap:InventoryNet

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AmortizationOfIntangibleAssets
us-gaap:StatementBusinessSegments

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:StatementGeographical

us-gaap:Goodwill
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:Subsegments

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass
us-gaap:StatementBusinessSegments

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:AccruedIncomeTaxesCurrent

us-gaap:AccruedLiabilitiesCurrent

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:LiabilitiesCurrent

us-gaap:LongTermDebtCurrent

us-gaap:OperatingLeaseLiabilityCurrent
us-gaap:BalanceSheetLocation

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:LongTermDebt

us-gaap:LongTermDebtNoncurrent

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:MinorityInterest

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent
us-gaap:BalanceSheetLocation

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:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:MinorityInterest

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:PaymentsOfDividendsCommonStock
us-gaap:DebtInstrument
us-gaap:DebtInstrumentInterestRateStatedPercentage

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance
us-gaap:DebtInstrument
nov:AccruedAndUnpaidInterestOnUnsecuredDebt

nov:ChangeInFairValueOfDerivative

nov:ChangeInFairValueOfOpenDerivatives

nov:ChangeInFairValueOfOutstandingDerivative

nov:ContractWithCustomerAssetIncreaseDecreaseProvision

nov:ContractWithCustomerLiabilityRevenueRecognizedIncludingAdditions

nov:GoodwillAndIndefiniteLivedIntangibleAssetImpairment

nov:IncomeTaxBenefitOffsetAmountFromCaresActTwoThousandTwentyAid

nov:IntangibleAssetsTranslationAndPurchaseAccountingAdjustments
us-gaap:StatementBusinessSegments
us-gaap:CreditFacility
nov:LineOfCreditFacilityCovenantTermsMaximumDebtToEquityPercentage

nov:OtherComprehensiveIncomeLossCumulativeChangeInNetGainLossFromCashFlowHedgesTax
us-gaap:DebtInstrument
nov:PaymentOnRedemptionUnsecuredDebt

nov:PercentageAsOfOperatingProfitToRevenue
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:AwardType
nov:PercentageOfPerformanceSharesAwarded
us-gaap:DebtInstrument
nov:PremiumOnRedemptionOfUnsecuredDebt

nov:ProvisionForInventoryLosses

nov:WithholdingTaxes
us-gaap:StatementEquityComponents
us-gaap:StatementScenario, us-gaap:LongtermDebtType
nov:WriteOffOfUnamortizedDiscountAndDebtIssuanceCost

us-gaap:ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice

us-gaap:ContractWithCustomerAssetIncreaseDecreaseForContractAcquiredInBusinessCombination

us-gaap:ContractWithCustomerAssetReclassifiedToReceivable

us-gaap:ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice

us-gaap:ContractWithCustomerLiabilityIncreaseDecreaseForContractAcquiredInBusinessCombination

us-gaap:ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod
us-gaap:CreditFacility
us-gaap:DebtInstrumentBasisSpreadOnVariableRate1
us-gaap:VariableRate

us-gaap:DeferredIncomeTaxesAndTaxCredits

us-gaap:DepreciationAndAmortization

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet

us-gaap:DividendsCommonStockCash

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:FinanceLeasePrincipalPayments

us-gaap:GoodwillForeignCurrencyTranslationGainLoss
us-gaap:StatementBusinessSegments

us-gaap:GoodwillImpairmentLoss
us-gaap:StatementBusinessSegments

us-gaap:ImpairmentOfIntangibleAssetsExcludingGoodwill
us-gaap:StatementBusinessSegments

us-gaap:ImpairmentOfLongLivedAssetsHeldForUse

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInContractWithCustomerAsset

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:InvestmentIncomeInterest

us-gaap:NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsNonredeemable
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax

us-gaap:OtherNoncashIncomeExpense

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsOfDebtExtinguishmentCosts
us-gaap:LongtermDebtType
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities
us-gaap:StatementEquityComponents
us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
us-gaap:LongtermDebtType
us-gaap:RedemptionPremium
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:DebtInstrument
us-gaap:RepaymentsOfUnsecuredDebt
us-gaap:LongtermDebtType
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:RestructuringCharges
us-gaap:RestructuringCostAndReserve
us-gaap:StatementBusinessSegments
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesNewIssues

nov:AccruedPurchaseOrders

nov:DeferredTaxAssetsAllowancesAndOperatingLiabilities

nov:DeferredTaxLiabilitiesCapitalLeases

nov:DeferredTaxLiabilitiesTaxAccruedLiabilities

nov:DeferredTaxLiabilitiesTaxOverBookDepreciation

nov:DefinedBenefitPlanEstimatedFutureEmployerContributions

nov:LeaseLiabilitiesCurrent

nov:LeaseLiabilitiesNonCurrent

nov:LineOfCreditFacilityCovenantComplianceDebtToCapitalizationPercentage

nov:OperatingLossCarryforwardTaxEffected
us-gaap:IncomeTaxAuthority

nov:OperatingLossCarryforwardsNetOfValuationAllowanceTaxEffected
us-gaap:IncomeTaxAuthority

nov:OutstandingLettersOfCreditUnderVariousBilateralCommittedLetterOfCreditFacilities

nov:PercentageOfInventoryReserve
us-gaap:AwardType
nov:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableWeightedAverageExercisePrice

us-gaap:AccrualForTaxesOtherThanIncomeTaxesCurrent

us-gaap:AccruedInsuranceCurrent

us-gaap:AccruedSalesCommissionCurrent
us-gaap:AdjustmentsForNewAccountingPronouncements
us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:ContractWithCustomerAssetNet

us-gaap:ContractWithCustomerAssetNetCurrent

us-gaap:ContractWithCustomerLiability
us-gaap:DebtInstrument
us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
us-gaap:DebtInstrument
us-gaap:DebtInstrumentUnamortizedPremium
us-gaap:LongtermDebtType
us-gaap:StatementScenario, us-gaap:LongtermDebtType

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanBenefitObligation

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets
us-gaap:DefinedBenefitPlanByPlanAssetCategories
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanFundedStatusOfPlan
us-gaap:LongtermDebtType
us-gaap:DepositLiabilitiesAccruedInterest
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:DerivativeFairValueOfDerivativeAsset
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:HedgingDesignation

us-gaap:DerivativeFairValueOfDerivativeLiability
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:FinancialInstrument, us-gaap:HedgingDesignation
us-gaap:HedgingDesignation

us-gaap:DerivativeInstrumentsAndHedgesLiabilities

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
us-gaap:AwardType

us-gaap:EquityMethodInvestments

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
us-gaap:FinancialInstrument
us-gaap:ForeignCurrencyCashFlowHedgeDerivativeAtFairValueNet

us-gaap:GoodwillImpairedAccumulatedImpairmentLoss

us-gaap:IncomeTaxesReceivable

us-gaap:IntangibleAssetsGrossExcludingGoodwill
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:InterestPayableCurrent

us-gaap:InventoryAdjustments

us-gaap:InventoryFinishedGoodsNetOfReserves

us-gaap:InventoryGross

us-gaap:InventoryRawMaterialsAndSuppliesNetOfReserves

us-gaap:InventoryValuationReserves

us-gaap:InventoryWorkInProcessNetOfReserves

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
us-gaap:CreditFacility
us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity
us-gaap:CreditFacility
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:LongtermDebtType
us-gaap:LongTermDebtFairValue

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLossCarryforwards
us-gaap:IncomeTaxAuthority
us-gaap:IncomeTaxAuthority, us-gaap:TaxCreditCarryforward
us-gaap:TaxCreditCarryforward

us-gaap:OperatingLossCarryforwardsValuationAllowance
us-gaap:IncomeTaxAuthority

us-gaap:OtherLongTermDebt
us-gaap:StatementEquityComponents

us-gaap:RevenueRemainingPerformanceObligation

us-gaap:SeniorNotes
us-gaap:DebtInstrument
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1
us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

us-gaap:StandardProductWarrantyAccrualCurrent

us-gaap:TaxCreditCarryforwardAmount

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued

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

Plots across concepts


IncomeStatement
Net Income Loss
Expenses
Other Nonoperating Income Expense
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Operating Lease Right Of Use Asset
Current Assets
Prepaid Expense And Other Assets Current
NonCurrent Assets
Other Assets Noncurrent
PropertyPlantAndEquipmentNet
Property Plant And Equipment Net
Liabilities
Operating Lease Liability
Current Liabilities
Accrued Income Taxes Current
Noncurrent Liabilities
Minority Interest
Stockholders Equity
Retained Earnings Accumulated Deficit
CashFlow
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInOperatingActivities
Increase Decrease In Inventories
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Weighted Average Number Of Diluted Shares Outstanding
OperatingLeaseLiability
Operating Lease Liability Current
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four
InventoryNet
Inventory Work In Process Net Of Reserves
AccountsReceivable
Allowance For Doubtful Accounts Receivable Current

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:SharesIssued us-gaap:StatementEquityComponents us-gaap:CommonStock█▆▁391.0390.0388.0NA388.0388.0386.0NANA386.0383.0NANANA380.0NANANA379.0NANANA376.0NANANA419.0NANANA428.0NANANA427.0NANANA424.0NANANA421.0NANANA418.0NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁386.0385.0NA385.0385.0383.0NA382.0382.0380.0NA383.0381.0377.0NA377.0377.0376.0NA376.0375.0375.0NA381.0388.0409.0NA431.0430.0429.0NA428.0428.0428.0NA427.0427.0426.0NA425.0425.0423.0NA419.0419.0419.0NANANANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁386.0385.0NA385.0385.0383.0NA382.0382.0380.0NA379.0378.0377.0NA377.0377.0376.0NA376.0375.0375.0NA380.0387.0407.0NA429.0428.0428.0NA426.0426.0426.0NA425.0425.0423.0NA422.0422.0420.0NA417.0417.0417.0NANANANA
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount ▁█23.024.0NA26.028.027.0NA25.025.021.0NA11.018.019.0NA17.018.013.0NA14.014.015.0NA15.014.014.0NA6.09.010.0NA7.07.07.0NA4.05.06.0NANA2.03.0NANANANANANANANA
us-gaap:EarningsPerShareBasic ▇▇▇▇▇▅▇▇▁▇▇▇▇▇▇▇▇▇▆▆▇▇▅▇██████████████████████████-0.07-0.3-0.9000000000000004-0.14-0.24-5.34-1.01-0.64-14.11-0.20.030.00.06-0.18-0.04-0.07-0.2-0.32-1.9-3.62-0.58-0.32-4.060.410.750.761.391.631.451.381.541.491.251.181.571.441.421.431.361.261.140.971.050.970.961.010.950.930.531.13
us-gaap:EarningsPerShareDiluted ▇▇▇▇▇▅▇▇▁▇▇▇▇▇▇▇▇▇▆▆▇▇▅▇██████████████████████████-0.07-0.3-0.9000000000000004-0.14-0.24-5.34-1.01-0.64-14.11-0.20.030.00.06-0.18-0.04-0.07-0.2-0.32-1.9-3.62-0.58-0.32-4.060.410.740.761.391.621.441.371.531.491.241.171.561.431.421.421.351.251.130.961.050.960.961.010.940.920.531.13
  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
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,nov:CompletionAndProductionSolutions▁▁▂▂▂▃▄▃▃▂▄▃▃▃▃▃▃▃▂▂▂▂▃▄▄▅█▇▆▅▇▆▆497.0439.0546.0601.0611.0675.0799.0728.0663.0581.0788.0735.0738.0670.0690.0682.0652.0648.0602.0543.0538.0558.0746.0798.0873.0948.01325.01191.01127.01002.01155.01095.01057.0NANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,nov:RigTechnologies▂▁▁▁▂▃▇▅▆▄█▅▅▂▄▂▃487.0431.0437.0449.0476.0557.0759.0649.0671.0603.0804.0637.0651.0483.0614.0510.0546.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,nov:WellboreTechnologies▂▁▁▁▁▃▃▄▄▄▄▄▄▃▃▃▃▂▂▂▂▃▃▄▅▆███▆▇▇▆463.0413.0373.0361.0442.0691.0764.0793.0850.0807.0884.0847.0793.0711.0715.0693.0614.0555.0531.0526.0511.0631.0757.0834.0956.01171.01529.01469.01446.01278.01371.01395.01222.0NANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:StatementBusinessSegments us-gaap:IntersegmentEliminationNANA-29.0-27.0-33.0-40.0-41.0-44.0-52.0-51.0-78.0-65.0-76.0-69.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  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
 TTM Greenblatt ROC _ _▇▇▇▇▇▅▇▇▁▇▇▇▇▇▇▇▇▇▆▆▇▇▅▇▇██████████████████12.0-88.0-301.0-74.0-100.0-1950.0-349.0-154.0-5728.0-48.087.073.052.0-1.0-111.0-7.0-62.0-97.0-766.0-1186.0-270.0-189.0-1632.0234.0438.0570.0913.0988.0913.0861.0957.0946.0769.0751.0903.0898.0879.0877.0848.0772.0708.0609.0624.0NANANANANANANA
  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 20.0NA27.023.028.0NA26.041.030.0NA22.030.031.027.039.033.022.030.029.028.021.029.026.021.022.040.026.023.027.027.025.025.025.017.023.023.022.012.018.019.019.017.016.017.016.017.0NANANANA
us-gaap:ComprehensiveIncomeNetOfTax ▇▇▇▇▇▄▇▇▁▇▇▇▇▇▇▇▇▇▆▆▇▇▅▇█▇▇▇████▇▇▂████▇████▇▇7.0-136.0-279.0-19.0-51.0-2279.0-284.0-376.0-5368.0-53.0-97.0-29.0-213.0-19.0-15.0123.024.0-27.0-883.0-1320.0-234.0126.0-1600.0-202.0485.0-171.0125.0292.0709.0552.0654.0838.0388.0337.0-4546.0760.0431.0734.0514.0344.0514.0508.0422.0580.0284.0382.0NANANANA
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest ▇▇▇▇▇▅▇▇▁▇▇▇▇▇▇█▇▇▆▆▇█▆▇█▇10.0-135.0-280.0-17.0-45.0-2281.0-284.0-381.0-5363.0-51.0-94.0-26.0-212.0-17.0-16.0122.025.0-25.0-886.0-1322.0-234.0127.0-1598.0-202.0485.0-171.0NANANANANANANANA-1787.0757.0428.0732.0-1472.0340.0513.0505.0419.0580.0282.0379.0NANANANA
us-gaap:CostOfGoodsAndServicesSold ▁▁▂▁▂▂▃▃▃▂▃▂▂▂▂▂▂▂▃▂▂▃▃▄▅▆▇▇▆▇█▇▇▇▇▇▆▅▅▄▄▃▃▃▃▃1186.01093.01393.01245.01359.01659.01905.01975.02070.01684.01989.01761.01751.01508.01802.01550.01528.01532.02151.01567.01689.01945.02334.02634.03054.03643.04168.04059.03800.04381.04675.04327.04335.04043.04291.03948.03428.03036.02984.02576.02430.02171.02175.02066.02013.02070.0NANANANA
us-gaap:CostOfRevenue ▁▁▂▁▂▂▃▃▃▂▃▂▂▂▂▂▂▂▃▂▂▃▃▄▅▆▇▇▆▇█▇▇▇▇▇▆▅▅▄▄▃▃▃▃▃1186.01093.01393.01245.01359.01659.01905.01975.02070.01684.01989.01761.01751.01508.01802.01550.01528.01532.02151.01567.01689.01945.02334.02634.03054.03643.04168.04059.03800.04381.04675.04327.04335.04043.04291.03948.03428.03036.02984.02576.02430.02171.02175.02066.02013.02070.0NANANANA
us-gaap:GainsLossesOnExtinguishmentOfDebt NANA0.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument nov:TwoPointSixZeroUnsecuredSeniorNotesDueTwoThousandAndTwentyTwoNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:GrossProfit ▃▃▂▃▃▃▄▃▃▄▄▄▄▄▃▄▃▃▁▃▃▃▄▅▆▇██████▇▇█▇▇▇▇▇▆▆▆▆▆▆▆▆▆▆231.0156.0-66.0139.0137.0224.0376.0151.062.0256.0409.0393.0355.0287.0167.0285.0231.0209.0-459.079.035.0244.0359.0672.0855.01177.01536.01528.01455.01396.01497.01462.01266.01264.01395.01371.01306.01267.01275.01164.01083.0975.0997.0945.0928.0962.0979.0891.0875.01039.0
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest █████▅▇█▁███████-21.0-120.0-326.0-114.0-134.0-2205.0-431.0-189.0-5757.0-85.041.033.030.0-63.0-128.0-40.0NANANANANANANANANA502.0830.0984.0893.0787.0887.0861.0712.0NANANANANANANANANANANANANANANANANA
us-gaap:IncomeTaxExpenseBenefit ▅▅▅▄▄▃▄▆▁▅▅▅▅▅▄▅▅▅▄▆▄▄▃▅▆▇▇██████▇▇█████▇▇▇▇▇▇2.0-6.022.0-61.0-47.0-156.0-46.060.0-373.0-10.026.029.05.03.0-130.0-13.0-14.0-9.0-88.0120.0-121.0-118.0-152.036.0105.0189.0233.0283.0284.0260.0272.0283.0239.0224.0203.0265.0285.0269.0270.0252.0226.0189.0186.0169.0186.0197.0NANANANA
us-gaap:IncomeTaxesPaidNet ▁▂▂▂▁▂▂▂▂▂▂▂▂▂▁▂▂▂▂▂▃▁▂▃▆▂▄▃▆▄▃▃▆▃▄▄█▃▃▂▅▄▃▂▃▃-94.09.029.025.0-77.014.063.011.041.029.03.011.08.042.0-80.033.041.056.08.053.0152.0-32.022.0100.0564.096.0283.0211.0572.0314.0213.0218.0497.0171.0252.0299.0797.0224.0140.093.0446.0266.0207.082.0161.0101.0NANANANA
us-gaap:InterestExpense ▄▅▄▅▅▅▆▆▆▆▅▆▆▆▆▇▇▆▆▆█▆▇▆▇▇▇▇▇▇▇▇█▇▅▂▁▁▁▁▁▃▂▂▃▃19.020.019.021.022.022.025.025.025.025.022.024.023.024.025.026.026.025.025.025.030.025.027.024.026.026.026.026.027.026.027.026.030.028.021.011.09.08.09.08.09.014.012.012.013.013.0NANANANA
us-gaap:InterestPaidNet ▆▁▆▁▆▁▅▂▆▁▇▁▇▁▇▁▇▁▇▁█▁▇▂▇▂▇▁▇▂█▂█▂▃▂▂▂▂▁▃▂▃▂▃▂36.03.036.05.039.03.032.012.036.05.042.02.043.03.046.03.045.03.045.03.050.03.046.07.044.06.045.04.046.07.047.07.050.07.019.09.06.06.010.04.018.012.018.010.017.011.0NANANANA
us-gaap:NetIncomeLoss ▇▇▇▇▇▅▇▇▁▇▇▇▇▇▇▇▇▇▆▆▇▇▅▇████████████████████████▇█-26.0-115.0-347.0-55.0-93.0-2047.0-385.0-244.0-5389.0-77.012.01.024.0-68.0-14.0-26.0-75.0-122.0-714.0-1362.0-217.0-119.0-1523.0155.0289.0310.0595.0699.0619.0589.0658.0636.0531.0502.0668.0612.0605.0606.0574.0532.0481.0407.0440.0404.0401.0422.0394.0385.0220.0470.0
 us-gaap:NetIncomeLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome-3.0NA2.02.010.04.05.03.02.01.0-1.08.0-1.0-3.01.01.07.0-5.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:StatementEquityComponents us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:AccumulatedGainLossNetCashFlowHedgeParent-3.0NA3.02.010.04.06.03.02.01.00.02.0-1.0-3.02.01.07.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest ▆▅▄▅█▃▄▁▇▅▆▆▅▅▄▄▅▅▂▃▄▅▅▅▂▆▅▅▅3.01.0-1.02.06.0-2.00.0-5.05.02.03.03.01.02.0-1.0-1.01.02.0-3.0-2.00.01.01.01.0-3.03.02.02.01.0NA1.00.00.0-2.00.0-3.0-3.0-2.0-1.0-4.0-1.0-3.0-3.00.0-2.0-3.0NANANANA
us-gaap:OperatingIncomeLoss ▇▇▇▇▇▅▇▇▁▇▇▇▇▇▇▇▇▇▆▆▇▇▅▇▇█████████████████████12.0-88.0-301.0-74.0-100.0-1950.0-349.0-154.0-5728.0-48.087.073.052.0-1.0-111.0-7.0-62.0-97.0-766.0-1186.0-270.0-189.0-1632.0234.0438.0570.0913.0988.0913.0861.0957.0946.0769.0751.0903.0898.0879.0877.0848.0772.0708.0609.0624.0596.0590.0637.0NANANANA
us-gaap:OtherComprehensiveIncomeLossNetOfTax █▁33.0-21.0NA36.042.0-232.0NA-132.021.024.0NA-30.0-237.049.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherNonoperatingIncomeExpense ▆▆▇▇▇▇▃▆▇▆▅▆▇▃▆▆▇▆▆▅▅▆▆▆▅▃▁█▆-16.0-10.02.0-8.0-8.0-3.0-54.0-10.0-8.0-18.0-29.0-20.0-3.0-47.0-14.0-16.0-2.0-11.0-16.0-30.0-34.0-21.0-17.0-20.0-30.0-56.0-78.09.0-21.0NA-17.0-16.013.0-21.0-28.0-22.0-5.0-16.0-13.00.0-7.0-19.0-7.0-23.0-3.0-16.0NANANANA
us-gaap:ProfitLoss ▇▇▇▇▇▅▇▇▁▇▇▇▇▇▇▇▇▇▆▆▇▇▅▇██████████████████████-23.0-114.0-348.0-53.0-87.0-2049.0-385.0-249.0-5384.0-75.015.04.025.0-66.0-15.0-27.0-74.0-120.0-717.0-1364.0-217.0-118.0-1522.0156.0286.0313.0597.0701.0620.0589.0661.0636.0531.0500.0668.0609.0602.0604.0573.0528.0480.0404.0437.0404.0399.0419.0NANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest█▁3.01.0NA2.06.0-2.0NA-5.05.02.0NA3.01.02.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:Parent█▁-26.0-115.0NA-55.0-93.0-2047.0NA-244.0-5389.0-77.0NA1.024.0-68.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings█▁-26.0-115.0NA-55.0-93.0-2047.0NA-244.0-5389.0-77.0NA1.024.0-68.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▁▁▁▁▁▂▂▂▂▂▃▂▂▂▂▂▂▂▂▂▂▂▃▄▅▆▇▇▇▇█▇▇▇▇▇▆▅▅▅▄▄▄▄▃▄▄▄▄▄1417.01249.01327.01384.01496.01883.02281.02126.02132.01940.02398.02154.02106.01795.01969.01835.01759.01741.01692.01646.01724.02189.02722.03306.03909.04820.05709.05587.05255.05777.06172.05789.05601.05307.05685.05319.04734.04303.04259.03740.03513.03146.03172.03011.02941.03032.03134.03087.03010.03481.0
us-gaap:SellingGeneralAndAdministrativeExpense ▁▂▁▁▁▂▂▂▅▃▃▃▃▂▂▂▂▃▃▂▃▅▄▄▅█▇▇▇▇▇▆▆▆▆▆▅▄▅▄▄▄▄▃▃▃219.0244.0235.0213.0237.0283.0289.0293.0417.0304.0322.0320.0303.0288.0278.0292.0293.0306.0307.0293.0305.0433.0386.0383.0417.0607.0524.0540.0542.0535.0540.0516.0497.0513.0491.0473.0427.0390.0427.0392.0375.0366.0373.0349.0338.0325.0NANANANA
  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
  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 ▁▁▁▁▁▁▂▂▂▄▄▄▄▄▄▄▄▄▄▄▅▅▆▆▇▇▇█████▇▇▇▆▆▆▅▅▅▅▅9601.09672.09929.010168.010447.010690.013149.014005.014349.020002.019796.019893.019758.020010.020206.020934.020887.020904.021140.022194.023784.024754.026725.029628.031225.032424.033562.034270.033827.035480.034812.034673.033593.033556.031484.028662.027833.026287.025515.024544.023756.023156.023050.0NANANA21532.0NANANA
us-gaap:Liabilities ▁▁▁▁▁▂▂▂▂▂▂▂▂▂▂▃▃▃▃▃▄▄▆▇▇██▇▇█▇█▇█▆▅▅▄▄▃▃▃▃4423.04522.04650.04628.04914.05136.05303.05876.05862.06162.05907.05917.05790.05859.06046.06783.06865.06919.07137.07306.07598.08321.010265.011422.012220.013302.012790.012651.012409.012688.012482.012948.012642.012877.011128.08979.08902.07767.07787.07305.06851.06755.07188.0NANANA7304.0NANANA
us-gaap:LiabilitiesAndStockholdersEquity ▁▁▁▁▁▁▂▂▂▄▄▄▄▄▄▄▄▄▄▄▅▅▆▆▇▇▇█████▇▇▇▆▆▆▅▅▅▅▅9601.09672.09929.010168.010447.010690.013149.014005.014349.020002.019796.019893.019758.020010.020206.020934.020887.020904.021140.022194.023784.024754.026725.029628.031225.032424.033562.034270.033827.035480.034812.034673.033593.033556.031484.028662.027833.026287.025515.024544.023756.023156.023050.0NANANA21532.0NANANA
us-gaap:StockholdersEquity ▁▁▁▁▁▁▂▂▂▄▄▅▅▅▅▅▅▅▅▅▅▅▅▆▇▇▇█▇███▇▇▇▇▆▆▆▆▆▅▅5108.05081.05210.05465.05460.05486.07778.08057.08411.013765.013819.013906.013900.014082.014094.014084.013953.013921.013940.014818.016118.016355.016383.018126.018927.019037.020692.021523.021332.022697.022230.021627.020859.020549.020239.019574.018820.018416.017619.017134.016790.016289.015748.0NANANA14113.0NANANA
  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:AssetsCurrent ▁▁▁▁▁▂▂▂▂▂▂▂▂▂▂▃▃▃▃▃▃▄▅▆▆▇▇█▇██▇▇▇▇▆▆▆▅▅▅▄▄4908.04996.05209.05376.05590.05902.06113.06515.06766.06938.07279.07221.07008.07186.07217.07825.07741.07744.07876.08711.09204.010048.011801.012933.014167.015299.016162.016670.016003.017211.016423.016255.015221.014994.015678.013667.013014.012836.012110.012038.011226.010739.010535.0NANANA9598.0NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▂▂▂▂▂▁▁▁▁▁▂▁▁▁▂▂▂▂▂▂▂▃▃▃▄▅▇██▇▆▅▄▄▆▂▃▆▇▇▆▆▆▆▅▅▅1572.01607.01692.01485.01447.01115.01171.01313.01121.01270.01427.01293.01137.01236.01437.01722.01530.01479.01408.01510.01661.01759.02080.01846.02544.03024.03536.04091.03885.03688.03436.02741.02327.02441.03319.01702.01917.03390.03535.03870.03440.03060.03333.03070.02688.02608.02622.0NANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▆▇█▅▅▁▂▃▁▃▅▃▁▂▅█▆1572.01607.01692.01485.01447.01115.01171.01313.01121.01270.01427.01293.01137.01236.01437.01722.01530.0NA1408.0NANANA2080.0NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ReceivablesNetCurrent ▁▁▁▁▁▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▃▄▅▅▆▆▇▆█▇▇▆▆▆▆▅▅▅▄▄▄▃1258.01265.01274.01382.01502.01879.01855.01799.01973.01793.02101.02005.01967.02102.02015.02060.02086.01978.02083.01808.02044.02212.02926.03325.03476.04024.04416.04482.04427.05310.04896.04801.04424.04279.04320.04033.03860.03330.03291.03109.02849.02757.02425.0NANANA2187.0NANANA
us-gaap:InventoryNet ▁▁▁▂▂▂▂▃▃▄▃▄▄▄▃▄▄▄▄▅▅▆▆▇▇▇▇▇▇▇▇█████▇▆▅▅▅▄▄1322.01357.01408.01745.01929.02032.02197.02537.02858.03131.02986.03177.03158.03146.03003.03219.03207.03254.03325.04161.04287.04534.04678.05172.05394.05378.05281.05464.05198.05659.05603.06078.06083.06135.05891.05989.05501.04528.04030.03907.03756.03570.03388.0NANANA3490.0NANANA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent ▁▁▁▁▁▂▂▂▂▁▁▂▂▂▂▃▃▄▄▅▄▅▅▆▆▆▇▇▆█▆▇▆▅▆▆▅▄▃▃▄222.0190.0224.0209.0204.0237.0247.0251.0229.0205.0200.0263.0301.0287.0267.0306.0319.0380.0395.0467.0422.0503.0491.0530.0562.0569.0604.0619.0595.0709.0576.0625.0579.0474.0574.0592.0499.0426.0325.0339.0381.0NA258.0NANANANANANANA
  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 NANA4977.0NANANA5337.0NANANA5484.0NANANA5561.0NANANA5448.0NANANA5276.0NANANA5405.0NANANA5212.0NANANA4523.0NANANA3660.0NANANA2903.0NANANA2701.0NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType nov:OperatingEquipmentNANA2660.0NANANA2946.0NANANA3140.0NANANA3169.0NANANA3102.0NANANA3055.0NANANA3060.0NANANA2960.0NANANA2463.0NANANA1955.0NANANA1539.0NANANA1429.0NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType nov:RentalEquipmentNANA799.0NANANA851.0NANANA597.0NANANA581.0NANANA557.0NANANA639.0NANANA817.0NANANA758.0NANANA712.0NANANA636.0NANANA628.0NANANA594.0NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:BuildingImprovementsNANA1343.0NANANA1309.0NANANA1271.0NANANA1340.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LandNANA175.0NANANA231.0NANANA227.0NANANA252.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment NANA3050.0NANANA2983.0NANANA2687.0NANANA2559.0NANANA2298.0NANANA2152.0NANANA2043.0NANANA1804.0NANANA1578.0NANANA-1215.0NANANA-1063.0NANANA-865.0NANANA
us-gaap:AmortizationOfIntangibleAssets NANA11.011.010.017.015.017.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AmortizationOfIntangibleAssets us-gaap:StatementBusinessSegments nov:CompletionAndProductionSolutionsNANA1.01.01.06.05.06.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AmortizationOfIntangibleAssets us-gaap:StatementBusinessSegments nov:RigTechnologiesNANA7.07.07.07.06.08.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AmortizationOfIntangibleAssets us-gaap:StatementBusinessSegments nov:WellboreTechnologiesNANA3.03.02.04.04.03.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PropertyPlantAndEquipmentNet ▁▁▁▂▂▂▃▃▃▄▅▅▅▆▆▆▆▇▇▇▇▇▇▇▇▇██████▇▇▆▅▅▄▄▂▁▁▁1871.01894.01927.01994.02010.02003.02354.02361.02356.02605.02797.02813.02859.02926.03002.03031.03052.03108.03150.03261.03277.03303.03124.03122.03250.03216.03362.03377.03440.03437.03408.03333.03210.03215.02945.02818.02700.02531.02445.01967.01921.01861.01840.0NANANA1836.0NANANA
us-gaap:Goodwill ▁▁▁▁▁▁▂▃▃▅▅▅▅▅▅▅▅▅▅▅▆▆▆▇▇▇████████▆▆▆▅▅▅▅▅▅1495.01495.01493.01493.01493.01515.02807.03236.03206.06292.06264.06339.06273.06217.06227.06165.06129.06065.06067.06015.06986.07003.06980.08465.08507.08509.08539.08614.08640.08875.09049.09036.08997.09005.07172.06940.06917.06206.06151.05942.05949.05908.05790.0NANANA5489.0NANANA
us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill ▁▁▁▁▁▁▁▂▂▄▅▅▅▅▅▅▅▅▅▅▆▆▆▆▆▆▇▇▇▇████▇▇▇▆▆▆▆▆▆508.0516.0527.0516.0525.0534.0852.0866.0900.02942.03020.03072.03171.03215.03301.03377.03438.03467.03530.03626.03709.03800.03849.04087.04257.04290.04444.04695.04808.04953.05055.05180.05305.05399.04743.04431.04512.04004.04073.03995.04063.04026.04103.0NANANA4052.0NANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill NANA527.0516.0525.0534.0852.0866.0900.0NA3020.0NANANA3301.0NANANA3530.0NANANA3849.0NANANA4444.0NANANA5055.0NANANA4743.0NANANA4073.0NANANA4103.0NANANA4052.0NANANA
 us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass nov:OtherFiniteLivedIntangibleAssetsNANA35.0NANANA138.0NANANA114.0NANANA175.0NANANA408.0NANANA464.0NANANA548.0NANANA768.0NANANA760.0NANANANANANANA481.0NANANA410.0NANANA
 us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:CustomerRelationshipsNANA175.0NANANA293.0NANANA1726.0NANANA1956.0NANANA2150.0NANANA2386.0NANANA2715.0NANANA2946.0NANANA2615.0NANANANANANANA2397.0NANANA2453.0NANANA
 us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:PatentsNANA62.0NANANA74.0NANANA247.0NANANA218.0NANANA240.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:TrademarksNANA59.0NANANA67.0NANANA550.0NANANA568.0NANANA588.0NANANA615.0NANANA645.0NANANA698.0NANANA725.0NANANANANANANA582.0NANANA546.0NANANA
 us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass us-gaap:TradeNamesNANA196.0NANANA280.0NANANA383.0NANANA384.0NANANA384.0NANANA384.0NANANA536.0NANANA643.0NANANA643.0NANANA643.0NANANA643.0NANANANANANANA
 us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:StatementBusinessSegments nov:CompletionAndProductionSolutionsNANA47.048.050.050.0275.0264.0283.0NA1005.0NANANA1160.0NANANA1191.0NANANA1296.0NANANA1437.0NANANA1614.0NANANA1576.0NANANANANANANANANANANANANANANA
 us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:StatementBusinessSegments nov:RigTechnologiesNANA227.0232.0236.0242.0251.0256.0268.0NA280.0NANANA258.0NANANA275.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:StatementBusinessSegments nov:WellboreTechnologiesNANA253.0236.0239.0242.0326.0346.0349.0NA1735.0NANANA1883.0NANANA2064.0NANANA2254.0NANANA2666.0NANANA2999.0NANANA2942.0NANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset ▁▁▂▂▃▃▄▄▅█369.0356.0371.0376.0398.0399.0444.0437.0452.0542.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent █▆▆▅▆▂▂▂▄▄▄▅▄▅▅▆▅▅▄▅▅▅▆▆▆▇▇▄▄▄▄▄▄▅▅▄▃▃▃▁▂▂▂222.0181.0156.0155.0158.069.067.063.0129.0126.0124.0131.0126.0141.0137.0156.0151.0131.0124.0135.0147.0132.0156.0170.0182.0191.0190.0125.0113.0123.0115.0124.0108.0138.0140.0116.087.097.078.037.057.062.055.0NANANA72.0NANANA
  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 ▂▂▂▂▂▃▃▃▃▃▃▃▃▂▂▁▁▁▁▁▁▂▃▃▄▅▇▇▇█▇▇▇▇▇█▇▅▅▄▃▃▃526.0467.0489.0476.0556.0662.0715.0716.0695.0679.0722.0675.0616.0528.0510.0447.0448.0388.0414.0396.0434.0467.0623.0731.0847.0988.01189.01259.01178.01391.01275.01312.01232.01283.01200.01365.01265.01009.0901.0802.0745.0656.0628.0NANANA584.0NANANA
us-gaap:AccruedIncomeTaxesCurrent ▂▄▆█▆▃▅▁16.038.051.074.060.028.042.09.0NA21.066.0NA11.035.081.057.071.083.0119.035.074.0199.0264.0112.024.0432.0431.0267.0260.0484.0556.0260.0248.0406.0355.0194.0207.0649.0709.0399.0178.0284.0468.0NANANA226.0NANANA
us-gaap:AccruedLiabilitiesCurrent ▁▁▁▁▁▁▁▂▁▁▂▂▁▁▃▃▃▃▃▃▄▄▅▆▇▇█▇▆▆▆▆▆▅▆▅▅▅▅▅▅▄▄771.0792.0863.0852.0815.0888.0949.0983.0955.0876.01088.01023.0950.0965.01478.01544.01489.01512.01568.01628.01774.02058.02284.02810.03028.03300.03518.03310.02857.02717.02763.02857.02681.02468.02571.02363.02421.02172.02376.02154.02179.01989.02105.0NANANA2267.0NANANA
us-gaap:ContractWithCustomerLiabilityCurrent ▂▁▁▂▃▄▃▄▄▃▄▇██▆392.0349.0354.0371.0408.0470.0427.0455.0455.0412.0458.0570.0609.0598.0519.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesCurrent ▁▁▁▁▁▁▂▂▂▁▂▂▁▁▂▂▂▂▃▂▂▃▄▅▆▇██▇█▇▇▆▆▆▆▇▆▆▅▄▄▄1810.01934.01867.01884.01954.02163.02247.02276.02221.02103.02341.02276.02194.02132.02354.02842.02851.02852.03047.02615.02947.03435.04249.05193.05672.06667.07374.07201.06915.07098.06678.06317.05619.05546.05649.05681.06481.05445.05416.04744.04250.04132.04536.0NANANA4514.0NANANA
us-gaap:LongTermDebtCurrent NA182.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseLiabilityCurrent 80.0NA82.082.084.083.084.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAccruedLiabilitiesCurrent ▁▁▂▂▂▂▂▅▅▃▃▃▃▂▄▄▄▄▅▃▄▄▄▄▄▄▄▅▆▆▅███▇▇▇▆▇▄▃▃▄179.0196.0215.0232.0240.0214.0236.0347.0335.0250.0282.0258.0253.0244.0309.0318.0318.0288.0348.0286.0304.0291.0294.0298.0329.0320.0324.0351.0385.0396.0357.0466.0465.0484.0433.0444.0419.0395.0419.0307.0282.0267.0328.0NANANA200.0NANANA
  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:LongTermDebt NA1851.01834.0NANANANANANANA2711.02714.02715.02713.02712.03213.03214.03213.03214.03216.03280.03379.03930.03983.04305.04245.03166.03146.03148.03149.03150.03749.04120.04349.03149.01529.01448.0510.0510.0512.0513.0715.0887.0NANANA883.0NANANA
us-gaap:LongTermDebtNoncurrent ▄▄▄▄▄▄▄▅▅▅▅▅▅▅▅▅▅▅▅▆▆▆▇▇██▆▆▆▆▆▇██▆▃▁▁▁▂▂▂▂1686.01669.01834.01824.02029.02002.01989.02484.02483.02483.02704.02706.02707.02707.02706.02707.02708.02707.02708.03210.03268.03372.03928.03981.04154.04094.03014.02995.03148.03149.03149.03749.04120.04349.03148.01175.0159.0159.0159.0510.0511.0512.0514.0NANANA876.0NANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet ▃▇█▁▂72.077.078.070.071.0NA140.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:MinorityInterest ▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▂▁▁▂▂▃▂▃▃▃▃▄▃▄▅▅▄█▇▆▆▅▆▅▆▆▆70.069.069.075.073.068.068.072.076.075.070.070.068.069.066.067.069.064.063.070.068.078.077.080.078.085.080.096.086.095.0100.098.092.0130.0117.0109.0111.0104.0109.0105.0115.0112.0114.0NANANA115.0NANANA
us-gaap:OtherLiabilitiesNoncurrent ▂▂▂▁▁▂▂▂▂▂▃▂▁▄▃▃▃▃▃▃▂▂▂▆▅█▆▄▄▄▄▆▆▆▄▃▃▃▄▂▂▂▂260.0252.0259.0231.0223.0256.0253.0269.0285.0283.0298.0263.0223.0335.0309.0309.0307.0317.0318.0326.0280.0275.0283.0422.0418.0527.0430.0367.0344.0353.0363.0439.0445.0439.0334.0321.0327.0316.0360.0275.0275.0279.0253.0NANANA163.0NANANA
us-gaap:OperatingLeaseLiabilityNoncurrent 371.0NA376.0379.0391.0394.0424.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA81.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA64.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA55.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA44.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA245.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  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 ▁▁▁▁▁▁▂▂▂▄▄▅▅▅▅▅▅▅▅▅▅▅▅▆▇▇▇█▇███▇▇▇▇▆▆▆▆▆▅▅5108.05081.05210.05465.05460.05486.07778.08057.08411.013765.013819.013906.013900.014082.014094.014084.013953.013921.013940.014818.016118.016355.016383.018126.018927.019037.020692.021523.021332.022697.022230.021627.020859.020549.020239.019574.018820.018416.017619.017134.016790.016289.015748.0NANANA14113.0NANANA
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest ▁▁▁▁▁▁▂▂▂▄▄▅▄▅▅▅▅▅▅▅▅▅▅▆▆▇▇█▇███▇▇▇▇▆▆▆▆▆▅▅5178.05150.05279.05540.05533.05554.07846.08129.08487.013840.013889.013976.013968.014151.014160.014151.014022.013985.014003.014888.016186.016433.016460.018206.019005.019122.020772.021619.021418.022792.022330.021725.020951.020679.020356.019683.018931.018520.017728.017239.016905.016401.015862.0NANANA14228.0NANANA
us-gaap:AdditionalPaidInCapitalCommonStock ▇▇▇▇▇▇▇▇▆▆▆▆▆▆▆▆▆▆▆▆▅▅▅▁▂▃▆████▇▇▇▇▇▇▇▇▇▆▆▆8618.08598.08591.08567.08543.08518.08507.08483.08441.08408.08390.08361.08306.08256.08234.08190.08163.08135.08103.08079.08040.08024.08005.06201.06625.07045.08341.09099.08999.08933.08907.08846.08805.08772.08743.08718.08673.08650.08535.08513.08466.08432.08353.0NANANA8214.0NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▁▁▁▁▁▁▂▂▂▅▅▅▅▅▅▅▅▅▅▅▆▆▆█████▇███▇▇▇▇▆▆▆▆▅▅▅-2017.0-1991.0-1876.0-1529.0-1474.0-1381.0690.01094.01358.06766.06862.06869.06888.06883.06966.06999.07044.07138.07285.08018.09399.09635.09927.013398.013417.013306.013181.012782.012281.013801.013323.012776.012251.011831.011385.010773.010212.09658.09103.08580.08095.07661.07300.0NANANA5805.0NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▂▁▂▁▁▁▂▁▂▂▂▂▂▃▃▃▂▂▂▂▂▂▁▂▃▂▄▆▇▇▇▇▆▇█▇▇█▇▇███-1497.0-1530.0-1509.0-1577.0-1613.0-1655.0-1423.0-1524.0-1392.0-1413.0-1437.0-1328.0-1298.0-1061.0-1110.0-1109.0-1258.0-1356.0-1452.0-1283.0-1325.0-1308.0-1553.0-1477.0-1119.0-1318.0-834.0-362.048.0-41.0-4.01.0-201.0-58.0107.079.0-69.0104.0-23.037.0225.0192.091.0NANANA90.0NANANA
us-gaap:MinorityInterest ▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▂▁▁▂▂▃▂▃▃▃▃▄▃▄▅▅▄█▇▆▆▅▆▅▆▆▆70.069.069.075.073.068.068.072.076.075.070.070.068.069.066.067.069.064.063.070.068.078.077.080.078.085.080.096.086.095.0100.098.092.0130.0117.0109.0111.0104.0109.0105.0115.0112.0114.0NANANA115.0NANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue ▄▄20.020.0NA24.027.027.0NA41.032.012.0NA26.030.019.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  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:NetCashProvidedByUsedInOperatingActivities ▃▂▃▃▃▂▄▃▂▂▃▃▃▁▃▃▃▂▃▂▃▄▄▄▃▂▅▄▅▄█▆▃▄▅▃▁▂▄▅▆▂▅▄▃▂177.0-27.0186.0323.0378.039.0473.0352.0-73.0-38.0221.0190.0239.0-129.0321.0232.0168.0111.0153.058.0128.0621.0614.0410.0194.0114.0736.0519.0871.0488.01518.01009.0364.0506.0800.0137.0-253.0-64.0622.0634.0912.0-25.0807.0453.0187.095.0NANANANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ████████████▇█████▇███████▇█▇████▁▆▇▂█▆█▇█▆███-38.0-51.016.0-49.0-58.0-53.0-47.0-112.0-49.0-107.0-65.0-32.0-299.0-61.0-61.0-36.0-106.0-42.0-211.0-83.0-91.0-103.0-136.0-106.0-123.0-149.0-307.0-143.0-528.0-126.0-152.0-148.0-129.0-2535.0-765.0-413.0-2090.0-160.0-882.0-152.0-301.0-123.0-573.0-62.0-43.0-65.0NANANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▄▄▃▄▄▂▄▄▄▄▄▄▄▂▄▄▄▄▃▃▁▃▁▂▂▁▃▃▃▂▂▃▇█▄▆▄▃▄▃▃▄▄▄▄-179.0-3.0-3.0-229.016.0-43.0-574.0-34.0-19.0-20.0-18.08.0-2.0-18.0-543.0-21.0-18.0-13.0-25.0-126.0-129.0-861.0-224.0-942.0-561.0-436.0-950.0-130.0-158.0-105.0-668.0-465.0-334.01162.01578.050.0897.058.0-66.0-20.0-234.0-144.021.0-41.0-46.0-36.0NANANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▄▃▇▅█▄▃▆▃▂▆▆▃▂▁▆-35.0-85.0207.038.0332.0-56.0-142.0192.0-149.0-157.0134.0156.0-99.0-201.0-285.0192.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  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:IncreaseDecreaseInAccountsPayable ▇▅▆▄▃▄▅▆▆▄▆▇▇▆▇▅▇▅▅▅▅▂▃▃▂▁▃▇▅█▅▇▅▅▁▇▆█▇▇▇▆▆▅▇▄59.0-22.014.0-80.0-106.0-54.01.013.016.0-49.044.064.074.014.050.0-1.063.0-26.0-13.0-40.0-33.0-157.0-110.0-117.0-142.0-201.0-91.085.0-15.0116.0-37.084.0-30.0-8.0-184.058.05.0102.059.058.073.015.039.0-12.059.0-46.0NANANANA
us-gaap:IncreaseDecreaseInAccountsReceivable ▅▅▅▅▃▆▆▄▇▃▆▆▄▆▅▅▆▅▇▄▄▁▅▅▂▃▅▆▄█▆█▇▄▇▆▆▆▆▇▆▇▅▆▇▅-6.05.0-105.0-113.0-383.027.063.0-194.0182.0-326.0109.050.0-166.079.0-59.0-22.0110.0-101.0244.0-231.0-152.0-706.0-46.0-138.0-538.0-369.0-48.078.0-295.0418.0104.0393.0204.0-208.0266.089.0122.040.050.0267.058.0321.0-49.033.0279.0-74.0NANANANA
us-gaap:IncreaseDecreaseInInventories ▄▄▃▃▄▄▂▄▅▅▃▅▄▅▃▄▄▄▂▃▃▃▁▃▅▅▄▇█▅▁▅▄▄▄▇▇█▅▆▆▆▃▅▅▄-36.0-28.0-141.0-165.0-76.0-47.0-273.0-24.041.0152.0-186.043.04.0146.0-126.019.0-57.0-65.0-352.0-110.0-208.0-112.0-416.0-186.066.0126.0-107.0301.0426.090.0-443.034.00.013.0-91.0367.0293.0492.061.0167.0163.0200.0-140.0130.038.0-67.0NANANANA
us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet ▆▆▆▅▇▇▅▆▆▆▆▆▇▅▅▆▆▆▆▅▆▅▁██▇▅▄▄▇▇▄▅█▄▆▆█▃▅▅█▇▅▄▇3.033.0-47.0-63.0130.0105.0-73.013.029.0-12.024.033.0176.0-141.0-167.041.039.0-8.041.0-115.04.0-127.0-669.0291.0229.0216.0-70.0-283.0-241.0115.0121.0-287.0-147.0246.0-233.0-1.0-40.0272.0-374.0-147.0-96.0231.0202.0-133.0-261.0104.0NANANANA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▃▂▃▃▃▂▄▃▂▂▃▃▃▁▃▃▃▂▃▂▃▄▄▄▃▂▅▄▅▄█▆▃▄▅▃▁▂▄▅▆▂▅▄▃▂177.0-27.0186.0323.0378.039.0473.0352.0-73.0-38.0221.0190.0239.0-129.0321.0232.0168.0111.0153.058.0128.0621.0614.0410.0194.0114.0736.0519.0871.0488.01518.01009.0364.0506.0800.0137.0-253.0-64.0622.0634.0912.0-25.0807.0453.0187.095.0NANANANA
us-gaap:NetIncomeLoss ▇▇▇▇▇▅▇▇▁▇▇▇▇▇▇▇▇▇▆▆▇▇▅▇████████████████████████▇█-26.0-115.0-347.0-55.0-93.0-2047.0-385.0-244.0-5389.0-77.012.01.024.0-68.0-14.0-26.0-75.0-122.0-714.0-1362.0-217.0-119.0-1523.0155.0289.0310.0595.0699.0619.0589.0658.0636.0531.0502.0668.0612.0605.0606.0574.0532.0481.0407.0440.0404.0401.0422.0394.0385.0220.0470.0
 us-gaap:NetIncomeLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome-3.0NA2.02.010.04.05.03.02.01.0-1.08.0-1.0-3.01.01.07.0-5.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:StatementEquityComponents us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:AccumulatedGainLossNetCashFlowHedgeParent-3.0NA3.02.010.04.06.03.02.01.00.02.0-1.0-3.02.01.07.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ProfitLoss ▇▇▇▇▇▅▇▇▁▇▇▇▇▇▇▇▇▇▆▆▇▇▅▇██████████████████████-23.0-114.0-348.0-53.0-87.0-2049.0-385.0-249.0-5384.0-75.015.04.025.0-66.0-15.0-27.0-74.0-120.0-717.0-1364.0-217.0-118.0-1522.0156.0286.0313.0597.0701.0620.0589.0661.0636.0531.0500.0668.0609.0602.0604.0573.0528.0480.0404.0437.0404.0399.0419.0NANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest█▁3.01.0NA2.06.0-2.0NA-5.05.02.0NA3.01.02.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:Parent█▁-26.0-115.0NA-55.0-93.0-2047.0NA-244.0-5389.0-77.0NA1.024.0-68.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings█▁-26.0-115.0NA-55.0-93.0-2047.0NA-244.0-5389.0-77.0NA1.024.0-68.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  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 ████████████▇█████▇███████▇█▇████▁▆▇▂█▆█▇█▆███-38.0-51.016.0-49.0-58.0-53.0-47.0-112.0-49.0-107.0-65.0-32.0-299.0-61.0-61.0-36.0-106.0-42.0-211.0-83.0-91.0-103.0-136.0-106.0-123.0-149.0-307.0-143.0-528.0-126.0-152.0-148.0-129.0-2535.0-765.0-413.0-2090.0-160.0-882.0-152.0-301.0-123.0-573.0-62.0-43.0-65.0NANANANA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▂▂▂▂▂▂▂▂▂▁▂▂▂▁▂▁▁▁▂▂▃▃▄▃▄▄█▆▆▄▆▆▅▆▇▄▅▄▆▄▄▃▃▂▂▁49.049.053.049.056.068.067.069.054.043.071.071.063.039.065.042.043.042.063.060.077.084.0121.098.0104.0130.0231.0168.0169.0131.0185.0164.0152.0168.0201.0129.0140.0113.0166.0125.0113.079.092.062.047.031.0NANANANA
  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 ▃▄▄▃▄▄▂▄▄▄▄▄▄▄▂▄▄▄▄▃▃▁▃▁▂▂▁▃▃▃▂▂▃▇█▄▆▄▃▄▃▃▄▄▄▄-179.0-3.0-3.0-229.016.0-43.0-574.0-34.0-19.0-20.0-18.08.0-2.0-18.0-543.0-21.0-18.0-13.0-25.0-126.0-129.0-861.0-224.0-942.0-561.0-436.0-950.0-130.0-158.0-105.0-668.0-465.0-334.01162.01578.050.0897.058.0-66.0-20.0-234.0-144.021.0-41.0-46.0-36.0NANANANA
us-gaap:ProceedsFromIssuanceOfLongTermDebt ██▁▆17.017.00.011.0NANANANANANANANANANANANANANA0.01009.0595.02368.02193.04433.02880.01871.020.02.0NANA252.0801.0NANA4556.080.0NANANANANANANANANANANANANANA
us-gaap:RepaymentsOfLongTermDebt NANA0.0NANANANANANANA2.02.02.02.0502.01.01.02.03.01121.0696.03052.02246.04757.02820.0792.00.04.0150.01.0852.01172.0400.0186.02935.01.01.01.017.02.0202.0170.03.04.07.02.0NANANANA
us-gaap:PaymentsOfDividendsCommonStock NANA0.00.00.019.019.020.019.019.019.019.019.019.019.019.019.019.019.019.019.0173.0173.0174.0178.0185.0196.0198.0198.0111.0111.0111.0111.056.056.051.051.051.051.047.047.046.046.042.042.042.0NANANANA
  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:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument nov:TwoPointSixZeroUnsecuredSeniorNotesDueTwoThousandAndTwentyTwoNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

Shares Issued

us-gaap:SharesIssued us-gaap:StatementEquityComponents

us-gaap:SharesIssued

us-gaap:CommonStock


Shares
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-03-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value391390388388388386386383380379376419428427424421418417356
Percentage of SharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value386385385385383382382380383381377377377376376375375381388409431430429428428428427427426425425423419419419
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value386385385385383382382380379378377377377376376375375380387407429428428426426426425425423422422420417417417
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-232011-06-302011-03-31
Value23242628272525211118191718131414151514146.09.010.07.07.07.04.05.06.02.02.03.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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
Value-0.07-0.3-0.9-0.14-0.24-5.34-1.01-0.64-14.11-0.20.0300.06-0.18-0.04-0.07-0.2-0.32-1.9-3.62-0.58-0.32-4.060.410.750.761.391.631.451.381.541.491.251.181.571.441.421.431.361.261.140.971.050.970.961.010.950.930.531.13
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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
Value-0.07-0.3-0.9-0.14-0.24-5.34-1.01-0.64-14.11-0.20.0300.06-0.18-0.04-0.07-0.2-0.32-1.9-3.62-0.58-0.32-4.060.410.740.761.391.621.441.371.531.491.241.171.561.431.421.421.351.251.130.961.050.960.961.010.940.920.531.13
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value20272328264130223031273933223029282129262122402623272725252517232322121819191716171617
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.42.01.71.91.11.91.40.91.41.51.52.01.81.31.71.71.71.21.31.00.60.60.80.50.40.50.50.40.40.40.30.40.40.50.30.40.50.50.50.50.60.50.6

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:PlanName

nov:TwoThousandEighteenLongTermIncentivePlan


Allocated
Period End2021-03-312020-03-312019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value2027303330312733
Percentage of AllocatedShareBasedCompensationExpense0.00.0100.00.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.61.41.41.71.41.51.51.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nov:TwoThousandEighteenLongTermIncentivePlan0.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value7.0-136.0-279.0-19.0-51.0-2279.0-284.0-376.0-5368.0-53.0-97.0-29.0-213.0-19.0-15.012324-27.0-883.0-1320.0-234.0126-1600.0-202.0485-171.0125292709552654838388337-4546.0760431734514344514508422580284382
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.5-10.9-21.0-1.4-3.4-121.0-12.5-17.7-251.8-2.7-4.0-1.3-10.1-1.1-0.86.71.4-1.6-52.2-80.2-13.65.8-58.8-6.112.4-3.52.25.213.59.610.614.56.96.4-80.014.39.117.112.19.214.616.113.319.39.712.6

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value10.0-135.0-280.0-17.0-45.0-2281.0-284.0-381.0-5363.0-51.0-94.0-26.0-212.0-17.0-16.012225-25.0-886.0-1322.0-234.0127-1598.0-202.0485-171.0-1787.0757428732-1472.0340513505419580282379
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.7-10.8-21.1-1.2-3.0-121.1-12.5-17.9-251.5-2.6-3.9-1.2-10.1-0.9-0.86.61.4-1.4-52.4-80.3-13.65.8-58.7-6.112.4-3.5-31.414.29.017.0-34.69.114.616.113.219.39.612.5

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1186109313931245135916591905197520701684198917611751150818021550152815322151156716891945233426343054364341684059380043814675432743354043429139483428303629842576243021712175206620132070
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax83.787.5105.090.090.888.183.592.997.186.882.981.883.184.091.584.586.988.0127.195.298.088.985.779.778.175.673.072.772.375.875.774.777.476.275.574.272.470.670.168.969.269.068.668.668.468.3

us-gaap:CostOfGoodsAndServicesSold us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome


Cost
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3.010.0-1.0-10.0-5.0-7.0-4.0-2.0-1.03.0-2.0-1.0-4.0-4.0-4.08.0-4.0
Percentage of CostOfGoodsAndServicesSold0.30.7-0.1-0.7-0.3-0.4-0.2-0.1-0.10.2-0.1-0.1-0.3-0.2-0.30.5-0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.8-0.1-0.7-0.3-0.3-0.2-0.1-0.10.1-0.1-0.0-0.2-0.2-0.20.5-0.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome-300.00.0-50.0-500.00.00.00.0-200.00.00.0-200.00.0400.00.0200.0800.080.0

us-gaap:CostOfGoodsAndServicesSold us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Cost
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value3.010.0-1.0-10.0-5.0-7.0-4.0-2.0-1.03.0-2.0-1.04.0-4.0-4.08.0
Percentage of CostOfGoodsAndServicesSold0.30.7-0.1-0.7-0.3-0.4-0.2-0.1-0.10.2-0.1-0.10.3-0.2-0.30.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.8-0.1-0.7-0.3-0.3-0.2-0.1-0.10.1-0.1-0.00.2-0.2-0.20.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent-300.00.0-50.0-500.00.00.00.0-200.00.00.0-200.00.0-400.00.0200.0800.0

Cost Of Revenue

us-gaap:CostOfRevenue

us-gaap:CostOfRevenue


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1186109313931245135916591905197520701684198917611751150818021550152815322151156716891945233426343054364341684059380043814675432743354043429139483428303629842576243021712175206620132070
Percentage of CostOfRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax83.787.5105.090.090.888.183.592.997.186.882.981.883.184.091.584.586.988.0127.195.298.088.985.779.778.175.673.072.772.375.875.774.777.476.275.574.272.470.670.168.969.269.068.668.668.468.3

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2020-12-31
Value0
Percentage of GainsLossesOnExtinguishmentOfDebt0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument

nov:TwoPointSixZeroUnsecuredSeniorNotesDueTwoThousandAndTwentyTwo


Gains
Period End2020-08-252019-12-04
Value8200000.0-26000000.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nov:TwoPointSixZeroUnsecuredSeniorNotesDueTwoThousandAndTwentyTwo0.00.0

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:StatementScenario, us-gaap:LongtermDebtType

srt:ScenarioForecast, nov:TwoPointSixZeroUnsecuredSeniorNotesDueDecemberTwoThousandTwentyTwo


Gains
Period End2021-06-30
Value-7100000.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ScenarioForecast nov:TwoPointSixZeroUnsecuredSeniorNotesDueDecemberTwoThousandTwentyTwo0.0

Gross Profit

us-gaap:GrossProfit

us-gaap:GrossProfit


Gross
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
Value231156-66.013913722437615162256409393355287167285231209-459.0793524435967285511771536152814551396149714621266126413951371130612671275116410839759979459289629798918751039
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.312.5-5.010.09.211.916.57.12.913.217.118.216.916.08.515.513.112.0-27.14.82.011.113.220.321.924.426.927.327.724.224.325.322.623.824.525.827.629.429.931.130.831.031.431.431.631.731.228.929.129.8

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value-21.0-120.0-326.0-114.0-134.0-2205.0-431.0-189.0-5757.0-85.0413330-63.0-128.0-40.0502830984893787887861712
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.5-9.6-24.6-8.2-9.0-117.1-18.9-8.9-270.0-4.41.71.51.4-3.5-6.5-2.210.414.517.617.013.614.414.912.7

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
Value2.0-6.022-61.0-47.0-156.0-46.060-373.0-10.026295.03.0-130.0-13.0-14.0-9.0-88.0120-121.0-118.0-152.036105189233283284260272283239224203265285269270252226189186169186197
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 RevenueFromContractWithCustomerExcludingAssessedTax0.1-0.51.7-4.4-3.1-8.3-2.02.8-17.5-0.51.11.30.20.2-6.6-0.7-0.8-0.5-5.27.3-7.0-5.4-5.61.12.73.94.15.15.44.54.44.94.34.23.65.06.06.36.36.76.46.05.95.66.36.5

us-gaap:IncomeTaxExpenseBenefit us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome


Income
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-1.00.01.02.01.01.01.01.0-1.01.00.02.00.01.0-2.04.0
Percentage of IncomeTaxExpenseBenefit-50.00.0-1.6-4.3-0.6-2.21.7-0.3-3.83.40.066.7-0.0-7.714.3-44.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.10.00.10.10.10.00.00.0-0.00.00.00.10.00.1-0.10.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome100.00.050.0100.00.00.00.0100.00.0100.00.0-200.00.0-50.0-200.0-80.0

us-gaap:IncomeTaxExpenseBenefit us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Income
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-1.00.01.02.01.01.01.01.0-1.01.04.0-2.00.01.0-2.0
Percentage of IncomeTaxExpenseBenefit-50.00.0-1.6-4.3-0.6-2.21.7-0.3-3.83.480.0-66.7-0.0-7.714.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.10.00.10.10.10.00.00.0-0.00.00.2-0.10.00.1-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent100.00.050.0100.00.00.00.0100.00.0100.00.0200.00.0-50.0-200.0

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
Value-94.09.02925-77.014631141293.0118.042-80.03341568.053152-32.022100564962832115723142132184971712522997972241409344626620782161101
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-6.60.72.21.8-5.10.72.80.51.91.50.10.50.42.3-4.11.82.33.20.53.28.8-1.50.83.014.42.05.03.810.95.43.53.88.93.24.45.616.85.23.32.512.78.56.52.75.53.3

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
Value1920192122222525252522242324252626252525302527242626262627262726302821119.08.09.08.09.01412121313
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 RevenueFromContractWithCustomerExcludingAssessedTax1.31.61.41.51.51.21.11.21.21.30.91.11.11.31.31.41.51.41.51.51.71.11.00.70.70.50.50.50.50.50.40.40.50.50.40.20.20.20.20.20.30.40.40.40.40.4

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
Value363.0365.0393.03212365.0422.0433.0463.0453.0453.0503.0467.0446.0454.0467.0477.0507.0199.06.06.010.04.018121810.01711
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 RevenueFromContractWithCustomerExcludingAssessedTax2.50.22.70.42.60.21.40.61.70.31.80.12.00.22.30.22.60.22.70.22.90.11.70.21.10.10.80.10.90.10.80.10.90.10.30.20.10.10.20.10.50.40.60.30.60.4

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-26.0-115.0-347.0-55.0-93.0-2047.0-385.0-244.0-5389.0-77.0121.024-68.0-14.0-26.0-75.0-122.0-714.0-1362.0-217.0-119.0-1523.0155289310595699619589658636531502668612605606574532481407440404401422394385220470
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.8-9.2-26.1-4.0-6.2-108.7-16.9-11.5-252.8-4.00.50.01.1-3.8-0.7-1.4-4.3-7.0-42.2-82.7-12.6-5.4-56.04.77.46.410.412.511.810.210.711.09.59.511.811.512.814.113.514.213.712.913.913.413.613.912.612.57.313.5

us-gaap:NetIncomeLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome


Net
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-3.02.02.010.04.05.03.02.01.0-1.08.0-1.0-3.01.01.07.0-5.0
Percentage of NetIncomeLoss11.5-0.6-3.6-10.8-0.2-1.3-1.2-0.0-1.3-8.3800.0-4.24.4-7.1-3.8-9.34.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.20.20.10.70.20.20.10.10.1-0.00.4-0.0-0.20.10.10.4-0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome300.00.0100.0500.00.00.00.0200.00.00.0800.00.0300.00.0-50.0700.0100.0

us-gaap:NetIncomeLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Net
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-3.03.02.010.04.06.03.02.01.00.02.0-1.0-3.02.01.07.0
Percentage of NetIncomeLoss11.5-0.9-3.6-10.8-0.2-1.6-1.2-0.0-1.30.0200.0-4.24.4-14.3-3.8-9.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.20.20.10.70.20.30.10.10.10.00.1-0.0-0.20.10.10.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent300.00.0100.0500.00.00.00.0200.00.00.0200.00.0300.00.0-50.0700.0

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3.01.0-1.02.06.0-2.00.0-5.05.02.03.03.01.02.0-1.0-1.01.02.0-3.0-2.00.01.01.01.0-3.03.02.02.01.01.00.00.0-2.00.0-3.0-3.0-2.0-1.0-4.0-1.0-3.0-3.00.0-2.0-3.0
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.1-0.10.10.4-0.10.0-0.20.20.10.10.10.00.1-0.1-0.10.10.1-0.2-0.10.00.00.00.0-0.10.10.00.00.00.00.00.0-0.00.0-0.1-0.1-0.0-0.0-0.1-0.0-0.1-0.10.0-0.1-0.1

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value12-88.0-301.0-74.0-100.0-1950.0-349.0-154.0-5728.0-48.0877352-1.0-111.0-7.0-62.0-97.0-766.0-1186.0-270.0-189.0-1632.0234438570913988913861957946769751903898879877848772708609624596590637
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.8-7.0-22.7-5.3-6.7-103.6-15.3-7.2-268.7-2.53.63.42.5-0.1-5.6-0.4-3.5-5.6-45.3-72.1-15.7-8.6-60.07.111.211.816.017.717.414.915.516.313.714.215.916.918.620.419.920.620.219.419.719.820.121.0

us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Operating
Period End2021-06-302021-03-312020-06-302020-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value-37.0-49.0-50.0-72.0-71.0-88.0-47.0119-69.0-134.0-118.0-138.0-141.0-160.0-196.0-149.0-160.0-213.0-227.0-229.0-237.0-225.0-149.0-150.0-155.0-136.0-117.0-127.0-125.0-111.0
Percentage of OperatingIncomeLoss-308.355.750.03.7-97.3-169.24700.0-107.2985.7216.1121.618.011.959.3103.79.1-68.4-48.6-39.8-25.1-24.0-24.6-17.3-15.7-16.4-17.7-15.6-14.1-13.9-12.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.6-3.9-3.3-3.8-3.3-4.2-2.66.0-3.8-7.6-6.8-8.2-8.6-9.3-9.0-5.5-4.8-5.4-4.7-4.0-4.2-4.3-2.6-2.4-2.7-2.4-2.2-2.2-2.4-2.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination123.3144.1151.5180.0109.2115.868.10.0138.0252.867.00.065.663.261.80.040.842.042.00.041.747.449.30.050.549.347.00.048.148.9

us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, nov:CompletionAndProductionSolutions


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value-6.0-17.0-31.02542-1013.057-24.0-1932.0-35.0644640161944278.0-134.0-61.0-33.0-38.01.03.07879211185157137175175127
Percentage of OperatingIncomeLoss-50.019.310.3-33.8-42.051.9-16.315.633.772.973.663.076.9-1600.0-17.1-628.6-43.5-8.217.55.112.220.1-0.11.317.813.923.118.717.215.918.318.516.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.4-1.4-2.31.82.8-53.82.5-1.1-90.6-1.82.72.11.90.91.02.41.50.5-7.9-3.7-1.9-1.70.00.12.01.63.73.33.02.42.83.02.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nov:CompletionAndProductionSolutions-1.2-3.90.04.26.9-150.10.0-3.3-291.4-6.00.06.35.42.40.06.54.11.20.0-11.2-6.1-6.80.00.48.98.30.015.513.913.70.016.012.0

us-gaap:OperatingSegments, nov:RigTechnologies


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value49-8.0-132.0-3.0-25.0-202.0-23.0-110.0-422.03175586218-51.0186.0
Percentage of OperatingIncomeLoss408.39.143.94.125.010.46.671.47.4-64.686.279.5119.2-1800.045.9-257.1-9.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.5-0.6-9.9-0.2-1.7-10.7-1.0-5.2-19.81.63.12.72.91.0-2.61.00.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nov:RigTechnologies10.1-1.90.0-0.7-5.3-36.30.0-16.9-62.95.10.09.19.53.70.03.51.1

us-gaap:OperatingSegments, nov:WellboreTechnologies


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value6.0-14.0-78.0-50.0-67.0-663.0-317.042-3295.01941403812-21.00.0-24.0-57.0-439.0-94.0-146.0-91.0-1723.0-7.03879175278263221243306184
Percentage of OperatingIncomeLoss50.015.925.967.667.034.090.8-27.357.5-39.647.154.873.1-1200.018.9-0.038.758.857.37.954.148.1105.6-3.08.713.919.228.128.825.725.432.323.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.4-1.1-5.9-3.6-4.5-35.2-13.92.0-154.51.01.71.91.80.7-1.10.0-1.4-3.3-25.9-5.7-8.5-4.2-63.3-0.21.01.63.15.05.03.83.95.33.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nov:WellboreTechnologies1.3-3.40.0-13.9-15.2-95.90.05.3-387.62.40.04.74.81.70.00.0-3.9-10.30.0-17.9-28.6-14.40.0-0.84.06.70.018.918.217.30.021.915.1

us-gaap:OperatingIncomeLoss us-gaap:StatementBusinessSegments

us-gaap:IntersegmentElimination


Operating
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-60.0-46.0-50.0-72.0-66.0-62.0-79.0-63.0-93.0-71.0-88.0-47.0-117.0-127.0-125.0-111.0-101.0-89.0-86.0-80.0
Percentage of OperatingIncomeLoss19.962.250.03.718.940.31.4131.2-106.9-97.3-169.24700.0-15.6-14.1-13.9-12.6-11.5-10.5-11.1-11.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.5-3.3-3.3-3.8-2.9-2.9-3.7-3.2-3.9-3.3-4.2-2.6-2.2-2.2-2.4-2.3-2.3-2.1-2.3-2.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination0.0170.4151.5180.00.0140.9151.9123.50.0109.2115.868.10.00.00.00.00.00.00.00.0

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value33-21.03642-232.0-132.02124-30.0-237.049
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.3-1.72.62.8-12.3-6.21.01.2-1.4-11.32.7

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
Value33-21.03642-232.0-132.02124-30.0-237.049
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.3-1.72.62.8-12.3-6.21.01.2-1.4-11.32.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


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
Value33-21.03642-232.0-132.02124-30.0-237.049
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.3-1.72.62.8-12.3-6.21.01.2-1.4-11.32.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-16.0-10.02.0-8.0-8.0-3.0-54.0-10.0-8.0-18.0-29.0-20.0-3.0-47.0-14.0-16.0-2.0-11.0-16.0-30.0-34.0-21.0-17.0-20.0-30.0-56.0-78.09.0-21.0-17.0-16.013-21.0-28.0-22.0-5.0-16.0-13.00.0-7.0-19.0-7.0-23.0-3.0-16.0
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.1-0.80.2-0.6-0.5-0.2-2.4-0.5-0.4-0.9-1.2-0.9-0.1-2.6-0.7-0.9-0.1-0.6-0.9-1.8-2.0-1.0-0.6-0.6-0.8-1.2-1.40.2-0.4-0.3-0.30.2-0.4-0.5-0.4-0.1-0.4-0.30.0-0.2-0.6-0.2-0.8-0.1-0.5

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
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-23.0-114.0-348.0-53.0-87.0-2049.0-385.0-249.0-5384.0-75.0154.025-66.0-15.0-27.0-74.0-120.0-717.0-1364.0-217.0-118.0-1522.0156286313597701620589661636531500668609602604573528480404437404399419
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.6-9.1-26.2-3.8-5.8-108.8-16.9-11.7-252.5-3.90.60.21.2-3.7-0.8-1.5-4.2-6.9-42.4-82.9-12.6-5.4-55.94.77.36.510.512.511.810.210.711.09.59.411.811.412.714.013.514.113.712.813.813.413.613.8

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value3.01.02.06.0-2.0-5.05.02.03.01.02.0
Percentage of ProfitLoss-13.0-0.9-3.8-6.90.12.0-0.1-2.775.04.0-3.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.10.10.4-0.1-0.20.20.10.10.00.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-26.0-115.0-55.0-93.0-2047.0-244.0-5389.0-77.01.024-68.0
Percentage of ProfitLoss113.0100.9103.8106.999.998.0100.1102.725.096.0103.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.8-9.2-4.0-6.2-108.7-11.5-252.8-4.00.01.1-3.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-26.0-115.0-55.0-93.0-2047.0-244.0-5389.0-77.01.024-68.0
Percentage of ProfitLoss113.0100.9103.8106.999.998.0100.1102.725.096.0103.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.8-9.2-4.0-6.2-108.7-11.5-252.8-4.00.01.1-3.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value14171249132713841496188322812126213219402398215421061795196918351759174116921646172421892722330639094820570955875255577761725789560153075685531947344303425937403513314631723011294130323134308730103481
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:ConsolidationItems

us-gaap:IntersegmentElimination


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value-30.0-34.0-29.0-27.0-33.0-40.0-41.0-44.0-52.0-51.0-78.0-65.0-76.0-69.0-50.0-50.0-53.0-176.0486-215.0-253.0-317.0-365.0-392.0-507.0-541.0-556.0-569.0-475.0-302.0-316.0-307.0-276.0-249.0-249.0-260.0-227.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.1-2.7-2.2-2.0-2.2-2.1-1.8-2.1-2.4-2.6-3.3-3.0-3.6-3.8-2.5-2.7-3.0-10.128.7-13.1-14.7-14.5-13.4-11.9-13.0-11.2-9.7-10.2-9.0-5.2-5.1-5.3-4.9-4.7-4.4-4.9-4.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.1-2.7-2.2-2.0-2.2-2.1-1.8-2.1-2.4-2.6-3.3-3.0-3.6-3.8-2.5-2.7-3.0-10.128.7-13.1-14.7-14.5-13.4-11.9-13.0-11.2-9.7-10.2-9.0-5.2-5.1-5.3-4.9-4.7-4.4-4.9-4.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments


Revenue
Period End2021-06-302020-03-312019-03-31
Value1417557603
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.029.631.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.029.631.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, nov:CompletionAndProductionSolutions


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value4974395466016116757997286635817887357386706906826526486025435385587467988739481325119111271002115510951057
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax35.135.141.143.440.835.835.034.231.129.932.934.135.037.335.037.237.137.235.633.031.225.527.424.122.319.723.221.321.417.318.718.918.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax35.135.141.143.440.835.835.034.231.129.932.934.135.037.335.037.237.137.235.633.031.225.527.424.122.319.723.221.321.417.318.718.918.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nov:CompletionAndProductionSolutions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nov:RigTechnologies


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value487431437449476557759649671603804637651483614510546
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.434.532.932.431.829.633.330.531.531.133.529.630.926.931.227.831.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.434.532.932.431.829.633.330.531.531.133.529.630.926.931.227.831.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nov:RigTechnologies100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nov:WellboreTechnologies


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value46341337336144269176479385080788484779371171569361455553152651163175783495611711529146914461278137113951222
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax32.733.128.126.129.536.733.537.339.941.636.939.337.739.636.337.834.931.931.432.029.628.827.825.224.524.326.826.327.522.122.224.121.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax32.733.128.126.129.536.733.537.339.941.636.939.337.739.636.337.834.931.931.432.029.628.827.825.224.524.326.826.327.522.122.224.121.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nov:WellboreTechnologies100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments, us-gaap:Subsegments, us-gaap:SubsegmentsConsolidationItems

us-gaap:OperatingSegments, nov:CompletionAndProductionSolutions, nov:Continental, us-gaap:IntersubsegmentEliminations


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value10.01310.09.01113131317162420222011161113
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.71.00.80.70.70.70.60.60.80.81.00.91.01.10.60.90.60.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.71.00.80.70.70.70.60.60.80.81.00.91.01.10.60.90.60.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nov:CompletionAndProductionSolutions nov:Continental us-gaap:IntersubsegmentEliminations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nov:CompletionAndProductionSolutions, nov:LandAndOffshore, us-gaap:IntersubsegmentEliminations


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value10.01310.09.01113131317162420222011161113
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.71.00.80.70.70.70.60.60.80.81.00.91.01.10.60.90.60.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.71.00.80.70.70.70.60.60.80.81.00.91.01.10.60.90.60.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nov:CompletionAndProductionSolutions nov:LandAndOffshore us-gaap:IntersubsegmentEliminations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nov:RigTechnologies, nov:Continental, us-gaap:IntersubsegmentEliminations


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value5.07.06.06.09.010.01115211929293635222329
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.60.50.40.60.50.50.71.01.01.21.31.71.91.11.31.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.60.50.40.60.50.50.71.01.01.21.31.71.91.11.31.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nov:RigTechnologies nov:Continental us-gaap:IntersubsegmentEliminations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nov:RigTechnologies, nov:LandAndOffshore, us-gaap:IntersubsegmentEliminations


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value5.07.06.06.09.010.01115211929293635222329
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.60.50.40.60.50.50.71.01.01.21.31.71.91.11.31.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.60.50.40.60.50.50.71.01.01.21.31.71.91.11.31.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nov:RigTechnologies nov:LandAndOffshore us-gaap:IntersubsegmentEliminations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nov:WellboreTechnologies, nov:Continental, us-gaap:IntersubsegmentEliminations


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value151413121317171614162516181417111312
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.11.11.00.90.90.90.70.80.70.81.00.70.90.80.90.60.70.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.11.11.00.90.90.90.70.80.70.81.00.70.90.80.90.60.70.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nov:WellboreTechnologies nov:Continental us-gaap:IntersubsegmentEliminations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nov:WellboreTechnologies, nov:LandAndOffshore, us-gaap:IntersubsegmentEliminations


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value151413121317171614162516181417111312
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.11.11.00.90.90.90.70.80.70.81.00.70.90.80.90.60.70.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.11.11.00.90.90.90.70.80.70.81.00.70.90.80.90.60.70.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nov:WellboreTechnologies nov:LandAndOffshore us-gaap:IntersubsegmentEliminations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems, us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments, us-gaap:Subsegments

us-gaap:OperatingSegments, nov:International, nov:CompletionAndProductionSolutions, nov:Continental


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value278264359424419437510420364296439372374358366384376
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax19.621.127.130.628.023.222.419.817.115.318.317.317.819.918.620.921.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax19.621.127.130.628.023.222.419.817.115.318.317.317.819.918.620.921.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nov:International nov:CompletionAndProductionSolutions nov:Continental100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nov:International, nov:RigTechnologies, nov:Continental


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value413369388389414470600521523443579419472313446348377
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax29.129.529.228.127.725.026.324.524.522.824.119.522.417.422.719.021.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax29.129.529.228.127.725.026.324.524.522.824.119.522.417.422.719.021.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nov:International nov:RigTechnologies nov:Continental100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nov:International, nov:WellboreTechnologies, nov:Continental


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value233211212217246313380355375331375362326282314305249
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.416.916.015.716.416.616.716.717.617.115.616.815.515.715.916.614.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.416.916.015.716.416.616.716.717.617.115.616.815.515.715.916.614.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nov:International nov:WellboreTechnologies nov:Continental100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nov:LandDestination, nov:CompletionAndProductionSolutions, nov:LandAndOffshore


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value329265319346345416468479456405509521509446471468410
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.221.224.025.023.122.120.522.521.420.921.224.224.224.823.925.523.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.221.224.025.023.122.120.522.521.420.921.224.224.224.823.925.523.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nov:LandDestination nov:CompletionAndProductionSolutions nov:LandAndOffshore100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nov:LandDestination, nov:RigTechnologies, nov:LandAndOffshore


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value11391106103113151221151171215268206208172232174173
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.07.38.07.47.68.09.77.18.011.111.29.69.99.611.89.59.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.07.38.07.47.68.09.77.18.011.111.29.69.99.611.89.59.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nov:LandDestination nov:RigTechnologies nov:LandAndOffshore100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nov:LandDestination, nov:WellboreTechnologies, nov:LandAndOffshore


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value330294257226296529571616679665733707660583568553490
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.323.519.416.319.828.125.029.031.834.330.632.831.332.528.830.127.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.323.519.416.319.828.125.029.031.834.330.632.831.332.528.830.127.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nov:LandDestination nov:WellboreTechnologies nov:LandAndOffshore100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nov:OffshoreDestination, nov:CompletionAndProductionSolutions, nov:LandAndOffshore


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value158161217246255246318236190160255194207204208198231
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.212.916.417.817.013.113.911.18.98.210.69.09.811.410.610.813.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.212.916.417.817.013.113.911.18.98.210.69.09.811.410.610.813.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nov:OffshoreDestination nov:CompletionAndProductionSolutions nov:LandAndOffshore100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nov:OffshoreDestination, nov:RigTechnologies, nov:LandAndOffshore


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value369333325340354396527483479369507402407276360313344
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.026.724.524.623.721.023.122.722.519.021.118.719.315.418.317.119.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.026.724.524.623.721.023.122.722.519.021.118.719.315.418.317.119.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nov:OffshoreDestination nov:RigTechnologies nov:LandAndOffshore100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nov:OffshoreDestination, nov:WellboreTechnologies, nov:LandAndOffshore


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value118105103123133145176161157126126124115114130129111
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.38.47.88.98.97.77.77.67.46.55.35.85.56.46.67.06.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.38.47.88.98.97.77.77.67.46.55.35.85.56.46.67.06.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nov:OffshoreDestination nov:WellboreTechnologies nov:LandAndOffshore100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, srt:NorthAmerica, nov:CompletionAndProductionSolutions, nov:Continental


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value209162177168181225276295282269325343342292313282265
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.713.013.312.112.111.912.113.913.213.913.615.916.216.315.915.415.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.713.013.312.112.111.912.113.913.213.913.615.916.216.315.915.415.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments srt:NorthAmerica nov:CompletionAndProductionSolutions nov:Continental100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, srt:NorthAmerica, nov:RigTechnologies, nov:Continental


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value695543545377148113127141196189143135146139140
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.94.43.23.93.54.16.55.36.07.38.28.86.87.57.47.68.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.94.43.23.93.54.16.55.36.07.38.28.86.87.57.47.68.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments srt:NorthAmerica nov:RigTechnologies nov:Continental100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, srt:NorthAmerica, nov:WellboreTechnologies, nov:Continental


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value215188148132183361367422461460484469449415384377352
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.215.111.29.512.219.216.119.821.623.720.221.821.323.119.520.520.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.215.111.29.512.219.216.119.821.623.720.221.821.323.119.520.520.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments srt:NorthAmerica nov:WellboreTechnologies nov:Continental100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems, us-gaap:StatementGeographical, us-gaap:Subsegments

us-gaap:OperatingSegments, nov:International, nov:Continental


Revenue
Period End2021-06-302020-03-312019-03-31
Value924470443
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax65.225.022.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax65.225.022.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nov:International nov:Continental100.0100.0100.0

us-gaap:OperatingSegments, nov:LandDestination, nov:LandAndOffshore


Revenue
Period End2021-06-302020-03-312019-03-31
Value772151215
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax54.58.011.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax54.58.011.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nov:LandDestination nov:LandAndOffshore100.0100.0100.0

us-gaap:OperatingSegments, nov:OffshoreDestination, nov:LandAndOffshore


Revenue
Period End2021-06-302020-03-312019-03-31
Value645396369
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax45.521.019.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax45.521.019.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nov:OffshoreDestination nov:LandAndOffshore100.0100.0100.0

us-gaap:OperatingSegments, srt:NorthAmerica, nov:Continental


Revenue
Period End2021-06-302020-03-312019-03-31
Value49377141
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.84.17.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.84.17.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments srt:NorthAmerica nov:Continental100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems, us-gaap:Subsegments, us-gaap:SubsegmentsConsolidationItems

us-gaap:IntersegmentElimination, nov:Continental, us-gaap:IntersubsegmentEliminations


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-30.0-34.0-29.0-27.0-33.0-40.0-41.0-44.0-52.0-51.0-78.0-65.0-76.0-69.0-50.0-50.0-53.0-44.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.1-2.7-2.2-2.0-2.2-2.1-1.8-2.1-2.4-2.6-3.3-3.0-3.6-3.8-2.5-2.7-3.0-2.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.1-2.7-2.2-2.0-2.2-2.1-1.8-2.1-2.4-2.6-3.3-3.0-3.6-3.8-2.5-2.7-3.0-2.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination nov:Continental us-gaap:IntersubsegmentEliminations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntersegmentElimination, nov:LandAndOffshore, us-gaap:IntersubsegmentEliminations


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-30.0-34.0-29.0-27.0-33.0-40.0-41.0-44.0-52.0-51.0-78.0-65.0-76.0-69.0-50.0-50.0-53.0-44.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.1-2.7-2.2-2.0-2.2-2.1-1.8-2.1-2.4-2.6-3.3-3.0-3.6-3.8-2.5-2.7-3.0-2.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.1-2.7-2.2-2.0-2.2-2.1-1.8-2.1-2.4-2.6-3.3-3.0-3.6-3.8-2.5-2.7-3.0-2.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination nov:LandAndOffshore us-gaap:IntersubsegmentEliminations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome


Revenue
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-1.0132.02.00.00.01.02.01.00.0-1.0-2.0-2.01.0-5.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.11.00.10.10.00.00.00.10.00.0-0.1-0.1-0.10.1-0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.11.00.10.10.00.00.00.10.00.0-0.1-0.1-0.10.1-0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome100.0100.0100.0100.00.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Revenue
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-1.0132.02.00.00.01.01.00.0-1.0-2.0-2.01.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.11.00.10.10.00.00.00.00.0-0.1-0.1-0.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.11.00.10.10.00.00.00.00.0-0.1-0.1-0.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent100.0100.0100.0100.00.00.0100.0100.00.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments

us-gaap:IntersegmentElimination


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-29.0-27.0-33.0-40.0-41.0-44.0-52.0-51.0-78.0-65.0-76.0-69.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.2-2.0-2.2-2.1-1.8-2.1-2.4-2.6-3.3-3.0-3.6-3.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.2-2.0-2.2-2.1-1.8-2.1-2.4-2.6-3.3-3.0-3.6-3.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical, us-gaap:Subsegments

nov:International, nov:Continental


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value92484495910301079122014901296126210701393115311729531126103710021093
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax65.267.672.374.472.164.865.361.059.255.258.153.555.753.157.256.557.062.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax65.267.672.374.472.164.865.361.059.255.258.153.555.753.157.256.557.062.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nov:International nov:Continental100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nov:LandDestination, nov:LandAndOffshore


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value7726506826757541096126012461306128515101434137712011271119510731000
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax54.552.051.448.850.458.255.258.661.366.263.066.665.466.964.665.161.057.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax54.552.051.448.850.458.255.258.661.366.263.066.665.466.964.665.161.057.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nov:LandDestination nov:LandAndOffshore100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nov:OffshoreDestination, nov:LandAndOffshore


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value6455996457097427871021880826655888720729594698640686741
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax45.548.048.651.249.641.844.841.438.733.837.033.434.633.135.434.939.042.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax45.548.048.651.249.641.844.841.438.733.837.033.434.633.135.434.939.042.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nov:OffshoreDestination nov:LandAndOffshore100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:NorthAmerica, nov:Continental


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value49340536835441766379183087087010051001934842843798757
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.832.427.725.627.935.234.739.040.844.841.946.544.346.942.843.543.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.832.427.725.627.935.234.739.040.844.841.946.544.346.942.843.543.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NorthAmerica nov:Continental100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:SellingGeneralAndAdministrativeExpense


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value219244235213237283289293417304322320303288278292293306307293305433386383417607524540542535540516497513491473427390427392375366373349338325
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.519.517.715.415.815.012.713.819.615.713.414.914.416.014.115.916.717.618.117.817.719.814.211.610.712.69.29.710.39.38.78.98.99.78.68.99.09.110.010.510.711.611.811.611.510.7

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-31
Value960196729929101681044710690131491400514349200021979619893197582001020206209342088720904211402219423784247542672529628312253242433562342703382735480348123467333593335563148428662278332628725515245442375623156230502153221479
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, nov:CompletionAndProductionSolutions


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value247238266233578257655916707272876192
Percentage of Assets24.929.131.528.627.322.121.120.919.7
Percentage of Assets24.929.131.528.627.322.121.120.919.7
Percentage of Assets us-gaap:OperatingSegments nov:CompletionAndProductionSolutions100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nov:RigTechnologies


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value29233758390646255327
Percentage of Assets29.428.619.722.925.2
Percentage of Assets29.428.619.722.925.2
Percentage of Assets us-gaap:OperatingSegments nov:RigTechnologies100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nov:WellboreTechnologies


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value266540787929784879118766116871186211032
Percentage of Assets26.831.040.138.837.432.834.834.135.0
Percentage of Assets26.831.040.138.837.432.834.834.135.0
Percentage of Assets us-gaap:OperatingSegments nov:WellboreTechnologies100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:StatementBusinessSegments

us-gaap:IntersegmentElimination


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312012-12-312011-12-312010-12-31
Value18691487172819512137347927012542
Percentage of Assets18.811.38.79.710.111.110.611.0
Percentage of Assets18.811.38.79.710.111.110.611.0
Percentage of Assets us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0

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
Value442345224650462849145136530358765862616259075917579058596046678368656919713773067598832110265114221222013302127901265112409126881248212948126421287711128897989027767778773056851675571887304
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 Assets46.146.846.845.547.048.040.342.040.930.829.829.729.329.329.932.432.933.133.832.931.933.638.438.639.141.038.136.936.735.835.937.337.638.435.331.332.029.530.529.828.829.231.233.9

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
Value9601967299291016810447106901314914005143492000219796198931975820010202062093420887209042114022194237842475426725296283122532424335623427033827354803481234673335933355631484286622783326287255152454423756231562305021532
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value5108508152105465546054867778805784111376513819139061390014082140941408413953139211394014818161181635516383181261892719037206922152321332226972223021627208592054920239195741882018416176191713416790162891574814113
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets53.252.552.553.752.351.359.257.558.668.869.869.970.470.469.867.366.866.665.966.867.866.161.361.260.658.761.762.863.164.063.962.462.161.264.368.367.670.169.169.870.770.368.365.5

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
Value490849965209537655905902611365156766693872797221700871867217782577417744787687119204100481180112933141671529916162166701600317211164231625515221149941567813667130141283612110120381122610739105359598
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 Assets51.151.752.552.953.555.246.546.547.234.736.836.335.535.935.737.437.137.037.339.238.740.644.243.745.447.248.248.647.348.547.246.945.344.749.847.746.848.847.549.047.346.445.744.6

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
Value1572160716921485144711151171131311211270142712931137123614371722153014791408151016611759208018462544302435364091388536883436274123272441331917021917339035353870344030603333307026882608262215431842
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 Assets16.416.617.014.613.910.48.99.47.86.37.26.55.86.27.18.27.37.16.76.87.07.17.86.28.19.310.511.911.510.49.97.96.97.310.55.96.912.913.915.814.513.214.50.00.00.012.27.20.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312015-12-31
Value1572160716921485144711151171131311211270142712931137123614371722153014082080
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets16.416.617.014.613.910.48.99.47.86.37.26.55.86.27.18.27.36.77.8

Receivables Net Current

us-gaap:ReceivablesNetCurrent

us-gaap:ReceivablesNetCurrent


Receivables
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
Value12581265127413821502187918551799197317932101200519672102201520602086197820831808204422122926332534764024441644824427531048964801442442794320403338603330329131092849275724252187
Percentage of ReceivablesNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.113.112.813.614.417.614.112.813.89.010.610.110.010.510.09.810.09.59.98.18.68.910.911.211.112.413.213.113.115.014.113.813.212.813.714.113.912.712.912.712.011.910.510.2

Inventory Net

us-gaap:InventoryNet

us-gaap:InventoryNet


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value13221357140817451929203221972537285831312986317731583146300332193207325433254161428745344678517253945378528154645198565956036078608361355891598955014528403039073756357033883490
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.814.014.217.218.519.016.718.119.915.715.116.016.015.714.915.415.415.615.718.718.018.317.517.517.316.615.715.915.415.916.117.518.118.318.720.919.817.215.815.915.815.414.716.2

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value222190224209204237247251229205200263301287267306319380395467422503491530562569604619595709576625579474574592499426325339381258
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.32.02.32.12.02.21.91.81.61.01.01.31.51.41.31.51.51.81.92.11.82.01.81.81.81.81.81.81.82.01.71.81.71.41.82.11.81.61.31.41.61.1

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
Value497753375484556154485276540552124523366029032701
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets50.140.627.727.525.819.716.115.014.414.312.612.5

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

nov:OperatingEquipment


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
Value266029463140316931023055306029602463195515391429
Percentage of PropertyPlantAndEquipmentGross53.455.257.357.056.957.956.656.854.553.453.052.9
Percentage of Assets26.822.415.915.714.711.49.18.57.87.76.76.6
Percentage of Assets nov:OperatingEquipment0.00.00.00.00.00.00.00.00.00.00.00.0

nov:RentalEquipment


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
Value799851597581557639817758712636628594
Percentage of PropertyPlantAndEquipmentGross16.115.910.910.410.212.115.114.515.717.421.622.0
Percentage of Assets8.06.53.02.92.62.42.42.22.32.52.72.8
Percentage of Assets nov:RentalEquipment0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:BuildingImprovements


Property
Period End2020-12-312019-12-312018-12-312017-12-31
Value1343130912711340
Percentage of PropertyPlantAndEquipmentGross27.024.523.224.1
Percentage of Assets13.510.06.46.6
Percentage of Assets us-gaap:BuildingImprovements0.00.00.00.0

us-gaap:Land


Property
Period End2020-12-312019-12-312018-12-312017-12-31
Value175231227252
Percentage of PropertyPlantAndEquipmentGross3.54.34.14.5
Percentage of Assets1.81.81.11.2
Percentage of Assets us-gaap:Land0.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


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
Value305029832687255922982152204318041578-1215.0-1063.0-865.0
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets30.722.713.612.710.98.16.15.25.0-4.8-4.6-4.0

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value111110.0171517
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.0

us-gaap:AmortizationOfIntangibleAssets us-gaap:StatementBusinessSegments

nov:CompletionAndProductionSolutions


Amortization
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value1.01.01.06.05.06.0
Percentage of AmortizationOfIntangibleAssets9.19.110.035.333.335.3
Percentage of Assets0.00.00.00.00.00.0
Percentage of Assets nov:CompletionAndProductionSolutions0.00.00.00.00.00.0

nov:RigTechnologies


Amortization
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value7.07.07.07.06.08.0
Percentage of AmortizationOfIntangibleAssets63.663.670.041.240.047.1
Percentage of Assets0.00.00.00.00.00.0
Percentage of Assets nov:RigTechnologies0.00.00.00.00.00.0

nov:WellboreTechnologies


Amortization
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value3.03.02.04.04.03.0
Percentage of AmortizationOfIntangibleAssets27.327.320.023.526.717.6
Percentage of Assets0.00.00.00.00.00.0
Percentage of Assets nov:WellboreTechnologies0.00.00.00.00.00.0

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
Value18711894192719942010200323542361235626052797281328592926300230313052310831503261327733033124312232503216336233773440343734083333321032152945281827002531244519671921186118401836
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 Assets19.519.619.419.619.218.717.916.916.413.014.114.114.514.614.914.514.614.914.914.713.813.311.710.510.49.910.09.910.29.79.89.69.69.69.49.89.79.69.68.08.18.08.08.5

us-gaap:PropertyPlantAndEquipmentNet us-gaap:StatementGeographical

country:AE


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value685260659058
Percentage of PropertyPlantAndEquipmentNet3.52.22.12.22.91.9
Percentage of Assets0.70.40.30.30.40.2
Percentage of Assets country:AE0.00.00.00.00.00.0

country:BR


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value921942172692812262902701629232
Percentage of PropertyPlantAndEquipmentNet4.88.27.89.08.97.28.67.95.53.81.7
Percentage of Assets0.91.51.11.31.30.80.90.80.50.40.1
Percentage of Assets country:BR0.00.00.00.00.00.00.00.00.00.00.0

country:CA


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value73777984827899123131113118
Percentage of PropertyPlantAndEquipmentNet3.83.32.82.82.62.52.93.64.44.66.4
Percentage of Assets0.70.60.40.40.40.30.30.40.40.40.5
Percentage of Assets country:CA0.00.00.00.00.00.00.00.00.00.00.0

country:DK


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value76111119128120128144166174
Percentage of PropertyPlantAndEquipmentNet3.94.74.34.33.84.14.34.95.9
Percentage of Assets0.80.80.60.60.60.50.40.50.6
Percentage of Assets country:DK0.00.00.00.00.00.00.00.00.0

country:GB


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value86112125140137163196200173131116
Percentage of PropertyPlantAndEquipmentNet4.54.84.54.74.35.25.85.95.95.46.3
Percentage of Assets0.90.90.60.70.60.60.60.60.50.50.5
Percentage of Assets country:GB0.00.00.00.00.00.00.00.00.00.00.0

country:MX


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value30434871779311010187
Percentage of PropertyPlantAndEquipmentNet1.61.81.72.42.43.03.33.03.0
Percentage of Assets0.30.30.20.40.40.30.30.30.3
Percentage of Assets country:MX0.00.00.00.00.00.00.00.00.0

country:RU


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value131669908868
Percentage of PropertyPlantAndEquipmentNet0.70.72.53.02.82.2
Percentage of Assets0.10.10.30.40.40.3
Percentage of Assets country:RU0.00.00.00.00.00.0

country:SA


Property
Period End2020-12-312019-12-31
Value17687
Percentage of PropertyPlantAndEquipmentNet9.13.7
Percentage of Assets1.80.7
Percentage of Assets country:SA0.00.0

country:SG


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1528475963788794938675
Percentage of PropertyPlantAndEquipmentNet0.81.21.72.02.02.52.62.83.23.54.1
Percentage of Assets0.20.20.20.30.30.30.30.30.30.30.3
Percentage of Assets country:SG0.00.00.00.00.00.00.00.00.00.00.0

country:US


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value10111257160316751810173518181830160614931045
Percentage of PropertyPlantAndEquipmentNet52.553.457.355.857.555.554.153.754.561.156.8
Percentage of Assets10.29.68.18.38.66.55.45.35.15.94.5
Percentage of Assets country:US0.00.00.00.00.00.00.00.00.00.00.0

currency:KRW


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value5177919794102113115112
Percentage of PropertyPlantAndEquipmentNet2.63.33.33.23.03.33.43.43.8
Percentage of Assets0.50.60.50.50.40.40.30.30.4
Percentage of Assets currency:KRW0.00.00.00.00.00.00.00.00.0

nov:OtherCountries


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value236387339324308521505509407
Percentage of PropertyPlantAndEquipmentNet12.216.412.110.89.816.715.014.913.8
Percentage of Assets2.42.91.71.61.51.91.51.51.3
Percentage of Assets nov:OtherCountries0.00.00.00.00.00.00.00.00.0

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-05-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-31
Value1495149514931493149315152807323632066300629262646339627362176227616561296065606760156986700369808465850785098539861486408875904990368997900571726940691762066151594259495908579054895225
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets15.615.515.014.714.314.221.323.122.30.031.531.631.931.731.130.829.429.329.028.727.129.428.326.128.627.226.225.425.125.525.026.026.126.826.822.824.224.923.624.124.225.025.525.125.524.3

us-gaap:Goodwill us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, nov:CompletionAndProductionSolutions


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value47310542041212220581997206721061314
Percentage of Goodwill31.737.532.634.133.928.624.223.318.3
Percentage of Assets4.88.010.310.59.77.56.26.04.2
Percentage of Assets us-gaap:OperatingSegments nov:CompletionAndProductionSolutions19.127.532.736.735.733.829.228.921.2

us-gaap:OperatingSegments, nov:RigTechnologies


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value712910121211491135
Percentage of Goodwill47.732.419.318.518.7
Percentage of Assets7.26.96.15.75.4
Percentage of Assets us-gaap:OperatingSegments nov:RigTechnologies24.424.231.024.821.3

us-gaap:OperatingSegments, nov:WellboreTechnologies


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value3088433011295628742874435744253769
Percentage of Goodwill20.630.048.147.547.441.251.048.952.6
Percentage of Assets3.16.415.214.613.610.813.012.712.0
Percentage of Assets us-gaap:OperatingSegments nov:WellboreTechnologies11.620.738.037.736.332.837.337.334.2

us-gaap:Goodwill us-gaap:StatementBusinessSegments

nov:CompletionAndProductionSolutions


Goodwillus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312016-09-302015-12-312014-12-312013-12-312012-12-31
Value47347347347310541078104120412122205820061997206921061314
Percentage of Goodwill31.731.731.731.237.533.332.532.634.133.933.328.624.223.318.3
Percentage of Assets4.84.74.54.48.07.77.310.310.59.79.07.56.26.04.2
Percentage of Assets nov:CompletionAndProductionSolutions0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

nov:RigTechnologies


Goodwillus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-31
Value71271271271291010011005121211491135
Percentage of Goodwill47.747.747.747.032.430.931.319.318.518.7
Percentage of Assets7.27.06.86.76.97.17.06.15.75.4
Percentage of Assets nov:RigTechnologies0.00.00.00.00.00.00.00.00.00.0

nov:WellboreTechnologies


Goodwillus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312016-09-302015-12-312014-12-312013-12-312012-12-31
Value3083083083308431157116030112956287428712874435744253769
Percentage of Goodwill20.620.620.621.830.035.836.248.147.547.447.741.251.048.952.6
Percentage of Assets3.13.02.93.16.48.38.115.214.613.612.910.813.012.712.0
Percentage of Assets nov:WellboreTechnologies0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Goodwill us-gaap:Subsegments

nov:Industrial


Goodwillus-gaap:
Period End2020-12-31
Value22
Percentage of Goodwill1.5
Percentage of Assets0.2
Percentage of Assets nov:Industrial0.0

nov:MDTotco


Goodwillus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value10.010.010.03263
Percentage of Goodwill0.70.70.72.12.2
Percentage of Assets0.10.10.10.30.5
Percentage of Assets nov:MDTotco0.00.00.00.00.0

nov:PFT


Goodwillus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value41636363407
Percentage of Goodwill2.74.24.24.214.5
Percentage of Assets0.40.60.60.63.1
Percentage of Assets nov:PFT0.00.00.00.00.0

Indefinite Lived Intangible Assets Excluding Goodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill


Indefinite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-05-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value50851652751652553485286690040029423020307231713215330133773438346735303626370938003849408742574290444446954808495350555180530553994743443145124004407339954063402641034052
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.35.35.35.15.05.06.56.26.30.014.715.315.416.016.116.316.116.516.616.716.315.615.414.413.813.613.213.213.714.214.014.514.915.816.115.115.516.215.216.016.317.117.417.818.8

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value52751652553485286690030203301353038494444505547434073410340524300
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.35.15.05.06.56.26.315.316.316.714.413.214.515.116.017.818.820.0

us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass

nov:OtherFiniteLivedIntangibleAssets


Intangible
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312010-12-312009-12-31
Value35138114175408464548768760481410
Percentage of IntangibleAssetsNetExcludingGoodwill6.616.23.85.311.612.112.315.216.011.710.1
Percentage of Assets0.41.00.60.91.91.71.62.22.42.11.9
Percentage of Assets nov:OtherFiniteLivedIntangibleAssets0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CustomerRelationships


Intangible
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312010-12-312009-12-31
Value175293172619562150238627152946261523972453
Percentage of IntangibleAssetsNetExcludingGoodwill33.234.457.259.360.962.061.158.355.158.460.5
Percentage of Assets1.82.28.79.710.28.98.18.58.310.411.4
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Patents


Intangible
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value6274247218240
Percentage of IntangibleAssetsNetExcludingGoodwill11.88.78.26.66.8
Percentage of Assets0.60.61.21.11.1
Percentage of Assets us-gaap:Patents0.00.00.00.00.0

us-gaap:Trademarks


Intangible
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312010-12-312009-12-31
Value5967550568588615645698725582546
Percentage of IntangibleAssetsNetExcludingGoodwill11.27.918.217.216.716.014.513.815.314.213.5
Percentage of Assets0.60.52.82.82.82.31.92.02.32.52.5
Percentage of Assets us-gaap:Trademarks0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:TradeNames


Intangible
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value196280383384384384536643643643643
Percentage of IntangibleAssetsNetExcludingGoodwill37.232.912.711.610.910.012.112.713.615.815.7
Percentage of Assets2.02.11.91.91.81.41.61.82.02.52.8
Percentage of Assets us-gaap:TradeNames0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:StatementBusinessSegments

nov:CompletionAndProductionSolutions


Intangible
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value474850502752642831005116011911296143716141576
Percentage of IntangibleAssetsNetExcludingGoodwill8.99.39.59.432.330.531.433.335.133.733.732.331.933.2
Percentage of Assets0.50.50.50.52.11.92.05.15.75.64.84.34.65.0
Percentage of Assets nov:CompletionAndProductionSolutions0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

nov:RigTechnologies


Intangible
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-31
Value227232236242251256268280258275
Percentage of IntangibleAssetsNetExcludingGoodwill43.145.045.045.329.529.629.89.37.87.8
Percentage of Assets2.32.32.32.31.91.81.91.41.31.3
Percentage of Assets nov:RigTechnologies0.00.00.00.00.00.00.00.00.00.0

nov:WellboreTechnologies


Intangible
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value2532362392423263463491735188320642254266629992942
Percentage of IntangibleAssetsNetExcludingGoodwill48.045.745.545.338.340.038.857.557.058.558.660.059.362.0
Percentage of Assets2.52.32.32.32.52.52.48.89.39.88.47.98.69.3
Percentage of Assets nov:WellboreTechnologies0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value369356371376398399444437452542537
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.83.73.73.73.83.73.43.13.22.70.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2221811561551586967631291261241311261411371561511311241351471321561701821911901251131231151241081381401168797783757625572
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 Assets2.31.91.61.51.50.60.50.40.90.60.60.70.60.70.70.70.70.60.60.60.60.50.60.60.60.60.60.40.30.30.30.40.30.40.40.40.30.40.30.20.20.30.20.3

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
Value526467489476556662715716695679722675616528510447448388414396434467623731847988118912591178139112751312123212831200136512651009901802745656628584
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 Assets5.54.84.94.75.36.25.45.14.83.43.63.43.12.62.52.12.11.92.01.81.81.92.32.52.73.03.53.73.53.93.73.83.73.83.84.84.53.83.53.33.12.82.72.7

Accrued Income Taxes Current

us-gaap:AccruedIncomeTaxesCurrent

us-gaap:AccruedIncomeTaxesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-03-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value163851746028429.02166113581577183119357419926411224432431267260484556260248406355194207649709399178284468226
Percentage of AccruedIncomeTaxesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.40.50.70.60.30.30.10.10.30.10.20.40.30.30.40.60.20.30.81.00.40.11.31.30.80.81.41.60.70.71.21.10.70.72.52.81.60.71.22.01.0

Accrued Liabilities Current

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccruedLiabilitiesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value77179286385281588894998395587610881023950965147815441489151215681628177420582284281030283300351833102857271727632857268124682571236324212172237621542179198921052267
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.08.28.78.47.88.37.27.06.74.45.55.14.84.87.37.47.17.27.47.37.58.38.59.59.710.210.59.78.47.77.98.28.07.48.28.28.78.39.38.89.28.69.110.5

Contract With Customer Liability Current

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:ContractWithCustomerLiabilityCurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value392349354371408470427455455412458570609598519
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.13.63.63.63.94.43.23.23.22.12.32.93.13.02.6

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
Value18101934186718841954216322472276222121032341227621942132235428422851285230472615294734354249519356726667737472016915709866786317561955465649568164815445541647444250413245364514
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 Assets18.920.018.818.518.720.217.116.315.510.511.811.411.110.711.713.613.613.614.411.812.413.915.917.518.220.622.021.020.420.019.218.216.716.517.919.823.320.721.219.317.917.819.721.0

Long Term Debt Current

us-gaap:LongTermDebtCurrent

us-gaap:LongTermDebtCurrent


Long
Period End2021-03-31
Value182
Percentage of LongTermDebtCurrent100.0
Percentage of Assets1.9

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-31
Value808282848384
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.80.80.80.80.6

us-gaap:OperatingLeaseLiabilityCurrent us-gaap:BalanceSheetLocation

us-gaap:OtherCurrentLiabilities


Operating
Period End2021-03-312020-12-312019-12-31
Value818284
Percentage of OperatingLeaseLiabilityCurrent0.0100.0100.0
Percentage of Assets0.80.80.6
Percentage of Assets us-gaap:OtherCurrentLiabilities0.00.00.0

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent


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
Value179196215232240214236347335250282258253244309318318288348286304291294298329320324351385396357466465484433444419395419307282267328200
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.92.02.22.32.32.01.82.52.31.21.41.31.31.21.51.51.51.41.61.31.31.21.11.01.11.01.01.01.11.11.01.31.41.41.41.51.51.51.61.31.21.21.40.9

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-03-312020-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value18511834271127142715271327123213321432133214321632803379393039834305424531663146314831493150374941204349314915291448510510512513715887883
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets19.118.513.713.613.713.613.415.315.415.415.214.513.813.714.713.413.813.19.49.29.38.99.010.812.313.010.05.35.21.92.02.12.23.13.84.1

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


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
Value168616691834182420292002198924842483248327042706270727072706270727082707270832103268337239283981415440943014299531483149314937494120434931481175159159159510511512514876
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets17.617.318.517.919.418.715.117.717.312.413.713.613.713.513.412.913.012.912.814.513.713.614.713.413.312.69.08.79.38.99.010.812.313.010.04.10.60.60.62.12.22.22.24.1

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value7277787071140
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.80.80.70.71.1

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
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
Value7069697573686872767570706869666769646370687877807885809686951009892130117109111104109105115112114115
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.70.70.70.70.60.50.50.50.40.40.40.30.30.30.30.30.30.30.30.30.30.30.30.20.30.20.30.30.30.30.30.30.40.40.40.40.40.40.40.50.50.50.5

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
Value260252259231223256253269285283298263223335309309307317318326280275283422418527430367344353363439445439334321327316360275275279253163
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.72.62.62.32.12.41.91.92.01.41.51.31.11.71.51.51.51.51.51.51.21.11.11.41.31.61.31.11.01.01.01.31.31.31.11.11.21.21.41.11.21.21.10.8

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-31
Value371376379391394424
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0
Percentage of Assets3.93.83.73.73.73.2

us-gaap:OperatingLeaseLiabilityNoncurrent us-gaap:BalanceSheetLocation

us-gaap:OtherNoncurrentLiabilities


Operating
Period End2021-03-312020-12-312019-12-31
Value361376424
Percentage of OperatingLeaseLiabilityNoncurrent0.0100.0100.0
Percentage of Assets3.73.83.2
Percentage of Assets us-gaap:OtherNoncurrentLiabilities0.00.00.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value81
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets0.8

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value64
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets0.6

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value55
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets0.6

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value44
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.4

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value245
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets2.5

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value458508501519559554
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0
Percentage of Assets4.63.93.63.62.80.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value590
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0
Percentage of Assets5.9

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value132
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets1.3

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value5108508152105465546054867778805784111376513819139061390014082140941408413953139211394014818161181635516383181261892719037206922152321332226972223021627208592054920239195741882018416176191713416790162891574814113
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets53.252.552.553.752.351.359.257.558.668.869.869.970.470.469.867.366.866.665.966.867.866.161.361.260.658.761.762.863.164.063.962.462.161.264.368.367.670.169.169.870.770.368.365.5

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value5178515052795540553355547846812984871384013889139761396814151141601415114022139851400314888161861643316460182061900519122207722161921418227922233021725209512067920356196831893118520177281723916905164011586214228127246724
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets53.953.253.254.553.052.059.758.059.169.270.270.370.770.770.167.667.166.966.267.168.166.461.661.460.959.061.963.163.364.264.162.762.461.664.768.768.070.569.570.271.270.868.866.159.20.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value-47.0-47.0-47.0-16.0-16.0-16.0-16.0-27.0-27.0-27.0-27.0-13.0-13.0-13.0-13.0-37.0-69.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.9-0.9-0.9-0.3-0.3-0.3-0.2-0.3-0.3-0.2-0.2-0.1-0.1-0.1-0.1-0.3-0.4
Percentage of Assets-0.5-0.5-0.5-0.2-0.2-0.1-0.1-0.2-0.2-0.1-0.1-0.1-0.1-0.1-0.1-0.2-0.3
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-31
Value131719-7.0-23.0-56.0-4.0-21.0-7.0-10.0-14.08.06.07.0-39.0-205.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.30.30.4-0.1-0.4-1.0-0.1-0.3-0.1-0.1-0.10.10.00.0-0.3-1.2
Percentage of Assets0.10.20.2-0.1-0.2-0.5-0.0-0.1-0.0-0.0-0.10.00.00.0-0.2-0.8
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-1497.0-1530.0-1509.0-1577.0-1613.0-1655.0-1423.0-1524.0-1392.0-1413.0-1437.0-1328.0-1298.0-1061.0-1110.0-1452.0-1553.0-834.0-4.0107-23.09190-161.0195
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-28.9-29.7-28.6-28.5-29.2-29.8-18.1-18.7-16.4-10.2-10.3-9.5-9.3-7.5-7.8-10.4-9.4-4.0-0.00.5-0.10.60.6-1.32.9
Percentage of Assets-15.6-15.8-15.2-15.5-15.4-15.5-10.8-10.9-9.7-7.1-7.3-6.7-6.6-5.3-5.5-6.9-5.8-2.5-0.00.3-0.10.40.4-0.70.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value-1463.0-1500.0-1481.0-1554.0-1574.0-1583.0-1403.0-1476.0-1358.0-1376.0-1396.0-1323.0-1291.0-1068.0-1104.0-1376.0-1279.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-28.3-29.1-28.1-28.1-28.4-28.5-17.9-18.2-16.0-9.9-10.1-9.5-9.2-7.5-7.8-9.8-7.8
Percentage of Assets-15.2-15.5-14.9-15.3-15.1-14.8-10.7-10.5-9.5-6.9-7.1-6.7-6.5-5.3-5.5-6.5-4.8
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value8618859885918567854385188507848384418408839083618306825682348103800583418907874385358353821479893617
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest166.4167.0162.7154.6154.4153.4108.4104.499.560.860.459.859.558.358.157.948.640.239.943.048.152.757.762.853.8
Percentage of Assets89.888.986.584.381.879.764.760.658.842.042.442.042.041.340.838.330.024.925.627.833.536.238.137.20.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value4.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.03.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.10.10.10.10.10.10.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value7069697573686872767570706869666377801001171091141159663
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest1.41.31.31.41.31.20.90.90.90.50.50.50.50.50.50.40.50.40.40.60.60.70.80.80.9
Percentage of Assets0.70.70.70.70.70.60.50.50.50.40.40.40.30.30.30.30.30.20.30.40.40.50.50.40.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value5108508152105465546054867778805784111376513819139061390014082140941394016383206922223020239176191574814113126286661
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest98.698.798.798.698.798.899.199.199.199.599.599.599.599.599.599.699.599.699.699.499.499.399.299.299.1
Percentage of Assets53.252.552.553.752.351.359.257.558.668.869.869.970.470.469.865.961.361.763.964.369.168.365.558.80.0
Percentage of Assets us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-2017.0-1991.0-1876.0-1529.0-1474.0-1381.0690109413586766686268696888688369667285992713181133231138591037300580547962846
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-39.0-38.7-35.5-27.6-26.6-24.98.813.516.048.949.449.149.348.649.252.060.363.559.755.951.346.040.837.742.3
Percentage of Assets-21.0-20.6-18.9-15.0-14.1-12.95.27.89.533.834.734.534.934.434.534.537.139.338.336.235.731.727.022.30.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


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
Value86188598859185678543851885078483844184088390836183068256823481908163813581038079804080248005620166257045834190998999893389078846880587728743871886738650853585138466843283538214
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets89.888.986.584.381.879.764.760.658.842.042.442.042.041.340.839.139.138.938.336.433.832.430.020.921.221.724.926.626.625.225.625.526.226.127.830.431.232.933.534.735.636.436.238.1

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
Value-2017.0-1991.0-1876.0-1529.0-1474.0-1381.0690109413586766686268696888688369666999704471387285801893999635992713398134171330613181127821228113801133231277612251118311138510773102129658910385808095766173005805
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 Assets-21.0-20.6-18.9-15.0-14.1-12.95.27.89.533.834.734.534.934.434.533.433.734.134.536.139.538.937.145.243.041.039.337.336.338.938.336.836.535.336.237.636.736.735.735.034.133.131.727.0

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value-1497.0-1530.0-1509.0-1577.0-1613.0-1655.0-1423.0-1524.0-1392.0-1413.0-1437.0-1328.0-1298.0-1061.0-1110.0-1109.0-1258.0-1356.0-1452.0-1283.0-1325.0-1308.0-1553.0-1477.0-1119.0-1318.0-834.0-362.048-41.0-4.01.0-201.0-58.010779-69.0104-23.0372251929190-161.0195
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-15.6-15.8-15.2-15.5-15.4-15.5-10.8-10.9-9.7-7.1-7.3-6.7-6.6-5.3-5.5-5.3-6.0-6.5-6.9-5.8-5.6-5.3-5.8-5.0-3.6-4.1-2.5-1.10.1-0.1-0.00.0-0.6-0.20.30.3-0.20.4-0.10.20.90.80.40.4-0.70.0

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
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
Value7069697573686872767570706869666769646370687877807885809686951009892130117109111104109105115112114115
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.70.70.70.70.60.50.50.50.40.40.40.30.30.30.30.30.30.30.30.30.30.30.30.20.30.20.30.30.30.30.30.30.40.40.40.40.40.40.40.50.50.50.5

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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2020242727413212263019
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2020242727413212263019
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2020242727413212263019
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value177-27.018632337839473352-73.0-38.0221190239-129.03212321681111535812862161441019411473651987148815181009364506800137-253.0-64.0622634912-25.080745318795
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.5-2.214.023.325.32.120.716.6-3.4-2.09.28.811.3-7.216.312.69.66.49.03.57.428.422.612.45.02.412.99.316.68.424.617.46.59.514.12.6-5.3-1.514.617.026.0-0.825.415.06.43.1

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-38.0-51.016-49.0-58.0-53.0-47.0-112.0-49.0-107.0-65.0-32.0-299.0-61.0-61.0-36.0-106.0-42.0-211.0-83.0-91.0-103.0-136.0-106.0-123.0-149.0-307.0-143.0-528.0-126.0-152.0-148.0-129.0-2535.0-765.0-413.0-2090.0-160.0-882.0-152.0-301.0-123.0-573.0-62.0-43.0-65.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.7-4.11.2-3.5-3.9-2.8-2.1-5.3-2.3-5.5-2.7-1.5-14.2-3.4-3.1-2.0-6.0-2.4-12.5-5.0-5.3-4.7-5.0-3.2-3.1-3.1-5.4-2.6-10.0-2.2-2.5-2.6-2.3-47.8-13.5-7.8-44.1-3.7-20.7-4.1-8.6-3.9-18.1-2.1-1.5-2.1

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-179.0-3.0-3.0-229.016-43.0-574.0-34.0-19.0-20.0-18.08.0-2.0-18.0-543.0-21.0-18.0-13.0-25.0-126.0-129.0-861.0-224.0-942.0-561.0-436.0-950.0-130.0-158.0-105.0-668.0-465.0-334.0116215785089758-66.0-20.0-234.0-144.021-41.0-46.0-36.0
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-12.6-0.2-0.2-16.51.1-2.3-25.2-1.6-0.9-1.0-0.80.4-0.1-1.0-27.6-1.1-1.0-0.7-1.5-7.7-7.5-39.3-8.2-28.5-14.4-9.0-16.6-2.3-3.0-1.8-10.8-8.0-6.021.927.80.918.91.3-1.5-0.5-6.7-4.60.7-1.4-1.6-1.2

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-35.0-85.020738332-56.0-142.0192-149.0-157.0134156-99.0-201.0-285.0192
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.5-6.815.62.722.2-3.0-6.29.0-7.0-8.15.67.2-4.7-11.2-14.510.5

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


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
Value59-22.014-80.0-106.0-54.01.01316-49.04464741450-1.063-26.0-13.0-40.0-33.0-157.0-110.0-117.0-142.0-201.0-91.085-15.0116-37.084-30.0-8.0-184.0585.01025958731539-12.059-46.0
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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
Value-6.05.0-105.0-113.0-383.02763-194.0182-326.010950-166.079-59.0-22.0110-101.0244-231.0-152.0-706.0-46.0-138.0-538.0-369.0-48.078-295.0418104393204-208.026689122405026758321-49.033279-74.0
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInInventories


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-36.0-28.0-141.0-165.0-76.0-47.0-273.0-24.041152-186.0434.0146-126.019-57.0-65.0-352.0-110.0-208.0-112.0-416.0-186.066126-107.030142690-443.0340.013-91.036729349261167163200-140.013038-67.0
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Other Operating Capital Net

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet


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
Value3.033-47.0-63.0130105-73.01329-12.02433176-141.0-167.04139-8.041-115.04.0-127.0-669.0291229216-70.0-283.0-241.0115121-287.0-147.0246-233.0-1.0-40.0272-374.0-147.0-96.0231202-133.0-261.0104
Percentage of IncreaseDecreaseInOtherOperatingCapitalNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value177-27.018632337839473352-73.0-38.0221190239-129.03212321681111535812862161441019411473651987148815181009364506800137-253.0-64.0622634912-25.080745318795
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.5-2.214.023.325.32.120.716.6-3.4-2.09.28.811.3-7.216.312.69.66.49.03.57.428.422.612.45.02.412.99.316.68.424.617.46.59.514.12.6-5.3-1.514.617.026.0-0.825.415.06.43.1

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-26.0-115.0-347.0-55.0-93.0-2047.0-385.0-244.0-5389.0-77.0121.024-68.0-14.0-26.0-75.0-122.0-714.0-1362.0-217.0-119.0-1523.0155289310595699619589658636531502668612605606574532481407440404401422394385220470
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.8-9.2-26.1-4.0-6.2-108.7-16.9-11.5-252.8-4.00.50.01.1-3.8-0.7-1.4-4.3-7.0-42.2-82.7-12.6-5.4-56.04.77.46.410.412.511.810.210.711.09.59.511.811.512.814.113.514.213.712.913.913.413.613.912.612.57.313.5

us-gaap:NetIncomeLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome


Net
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-3.02.02.010.04.05.03.02.01.0-1.08.0-1.0-3.01.01.07.0-5.0
Percentage of NetIncomeLoss11.5-0.6-3.6-10.8-0.2-1.3-1.2-0.0-1.3-8.3800.0-4.24.4-7.1-3.8-9.34.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.20.20.10.70.20.20.10.10.1-0.00.4-0.0-0.20.10.10.4-0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome300.015.4100.0500.00.00.00.0200.00.0-50.0800.00.0300.0-50.0-50.0700.0100.0

us-gaap:NetIncomeLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Net
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-3.03.02.010.04.06.03.02.01.00.02.0-1.0-3.02.01.07.0
Percentage of NetIncomeLoss11.5-0.9-3.6-10.8-0.2-1.6-1.2-0.0-1.30.0200.0-4.24.4-14.3-3.8-9.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.20.20.10.70.20.30.10.10.10.00.1-0.0-0.20.10.10.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent300.023.1100.0500.00.00.00.0200.00.00.0200.00.0300.0-100.0-50.0700.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
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-23.0-114.0-348.0-53.0-87.0-2049.0-385.0-249.0-5384.0-75.0154.025-66.0-15.0-27.0-74.0-120.0-717.0-1364.0-217.0-118.0-1522.0156286313597701620589661636531500668609602604573528480404437404399419
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.6-9.1-26.2-3.8-5.8-108.8-16.9-11.7-252.5-3.90.60.21.2-3.7-0.8-1.5-4.2-6.9-42.4-82.9-12.6-5.4-55.94.77.36.510.512.511.810.210.711.09.59.411.811.412.714.013.514.113.712.813.813.413.613.8

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value3.01.02.06.0-2.0-5.05.02.03.01.02.0
Percentage of ProfitLoss-13.0-0.9-3.8-6.90.12.0-0.1-2.775.04.0-3.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.10.10.4-0.1-0.20.20.10.10.00.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-26.0-115.0-55.0-93.0-2047.0-244.0-5389.0-77.01.024-68.0
Percentage of ProfitLoss113.0100.9103.8106.999.998.0100.1102.725.096.0103.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.8-9.2-4.0-6.2-108.7-11.5-252.8-4.00.01.1-3.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-26.0-115.0-55.0-93.0-2047.0-244.0-5389.0-77.01.024-68.0
Percentage of ProfitLoss113.0100.9103.8106.999.998.0100.1102.725.096.0103.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.8-9.2-4.0-6.2-108.7-11.5-252.8-4.00.01.1-3.8
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 End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-38.0-51.016-49.0-58.0-53.0-47.0-112.0-49.0-107.0-65.0-32.0-299.0-61.0-61.0-36.0-106.0-42.0-211.0-83.0-91.0-103.0-136.0-106.0-123.0-149.0-307.0-143.0-528.0-126.0-152.0-148.0-129.0-2535.0-765.0-413.0-2090.0-160.0-882.0-152.0-301.0-123.0-573.0-62.0-43.0-65.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.7-4.11.2-3.5-3.9-2.8-2.1-5.3-2.3-5.5-2.7-1.5-14.2-3.4-3.1-2.0-6.0-2.4-12.5-5.0-5.3-4.7-5.0-3.2-3.1-3.1-5.4-2.6-10.0-2.2-2.5-2.6-2.3-47.8-13.5-7.8-44.1-3.7-20.7-4.1-8.6-3.9-18.1-2.1-1.5-2.1

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
Value49495349566867695443717163396542434263607784121981041302311681691311851641521682011291401131661251137992624731
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

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-179.0-3.0-3.0-229.016-43.0-574.0-34.0-19.0-20.0-18.08.0-2.0-18.0-543.0-21.0-18.0-13.0-25.0-126.0-129.0-861.0-224.0-942.0-561.0-436.0-950.0-130.0-158.0-105.0-668.0-465.0-334.0116215785089758-66.0-20.0-234.0-144.021-41.0-46.0-36.0
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-12.6-0.2-0.2-16.51.1-2.3-25.2-1.6-0.9-1.0-0.80.4-0.1-1.0-27.6-1.1-1.0-0.7-1.5-7.7-7.5-39.3-8.2-28.5-14.4-9.0-16.6-2.3-3.0-1.8-10.8-8.0-6.021.927.80.918.91.3-1.5-0.5-6.7-4.60.7-1.4-1.6-1.2

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:ProceedsFromIssuanceOfLongTermDebt


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302012-12-312012-09-30
Value17170.0110.0100959523682193443328801871202.0252801455680
Percentage of ProceedsFromIssuanceOfLongTermDebt100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt


Repayments
Period End2020-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.02.02.02.02.05021.01.02.03.0112169630522246475728207920.04.01501.0852117240018629351.01.01.0172.02021703.04.07.02.0
Percentage of RepaymentsOfLongTermDebt0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments Of Dividends Common Stock

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsCommonStock


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
Value0.00.00.01919201919191919191919191919191917317317417818519619819811111111111156565151515147474646424242
Percentage of PaymentsOfDividendsCommonStock0.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Debt Instrument Interest Rate Stated Percentage

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument

us-gaap:DebtInstrumentInterestRateStatedPercentage

nov:TwoPointSixZeroUnsecuredSeniorNotesDueTwoThousandAndTwentyTwo


Debt
Period End2020-08-252019-12-04
Value2.60.026
Percentage of DebtInstrumentInterestRateStatedPercentage100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations nov:TwoPointSixZeroUnsecuredSeniorNotesDueTwoThousandAndTwentyTwo0.00.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-9.55.0-2.153.50.3510.071-5.343-31.70.0650.1180.167-0.0480.2930.10.1590.070.014-0.0960.3580.5-0.6060.1880.2690.3760.2880.3180.3060.3080.310.3090.3030.3210.3080.3230.0320.3190.2950.3180.32
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value45.747.6848.8848.9954.0859.561.2263.2958.6947.238.0134.1937.2429.12
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value7814055366497812321331185923302066233620912134
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value206321413446772864950-745.0762603657382397
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-312011-03-312010-12-312009-12-312008-12-312007-12-31
Value5738981327846113125185115128128127127128128128131117118586147
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value1093117595512025446348-133.093139.08.010.0
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nov:AccruedAndUnpaidInterestOnUnsecuredDebt us-gaap:DebtInstrument

nov:AccruedAndUnpaidInterestOnUnsecuredDebt

nov:TwoPointSixZeroUnsecuredSeniorNotesDueTwoThousandAndTwentyTwo


Accrued
Period End2020-08-25
Value1300000.0
Percentage of AccruedAndUnpaidInterestOnUnsecuredDebt100.0

nov:ChangeInFairValueOfDerivative

nov:ChangeInFairValueOfDerivative


Change
Period End2021-06-302020-06-30
Value-1.023
Percentage of ChangeInFairValueOfDerivative100.0100.0

nov:ChangeInFairValueOfOpenDerivatives

nov:ChangeInFairValueOfOpenDerivatives


Change
Period End2021-03-31
Value2000000.0
Percentage of ChangeInFairValueOfOpenDerivatives100.0

nov:ChangeInFairValueOfOutstandingDerivative

nov:ChangeInFairValueOfOutstandingDerivative


Change
Period End2020-09-30
Value14
Percentage of ChangeInFairValueOfOutstandingDerivative100.0

nov:ContractWithCustomerAssetIncreaseDecreaseProvision

nov:ContractWithCustomerAssetIncreaseDecreaseProvision


Contract
Period End2021-06-302021-03-312020-12-31
Value0-1000000.00
Percentage of ContractWithCustomerAssetIncreaseDecreaseProvision0.0100.00.0

nov:ContractWithCustomerLiabilityRevenueRecognizedIncludingAdditions

nov:ContractWithCustomerLiabilityRevenueRecognizedIncludingAdditions


Contract
Period End2021-06-302021-03-31
Value160214
Percentage of ContractWithCustomerLiabilityRevenueRecognizedIncludingAdditions100.0100.0

nov:GoodwillAndIndefiniteLivedIntangibleAssetImpairment

nov:GoodwillAndIndefiniteLivedIntangibleAssetImpairment


Goodwill
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value0.00.00.013784260.03186
Percentage of GoodwillAndIndefiniteLivedIntangibleAssetImpairment0.00.00.0100.0100.00.0100.0

nov:IncomeTaxBenefitOffsetAmountFromCaresActTwoThousandTwentyAid

nov:IncomeTaxBenefitOffsetAmountFromCaresActTwoThousandTwentyAid


Income
Period End2020-09-302020-06-302020-03-31
Value106100123
Percentage of IncomeTaxBenefitOffsetAmountFromCaresActTwoThousandTwentyAid100.0100.0100.0

nov:IntangibleAssetsTranslationAndPurchaseAccountingAdjustments

nov:IntangibleAssetsTranslationAndPurchaseAccountingAdjustments


Intangible
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value2.02.01.0-9.06.0-14.0
Percentage of IntangibleAssetsTranslationAndPurchaseAccountingAdjustments100.0100.0100.0100.0100.0100.0

nov:IntangibleAssetsTranslationAndPurchaseAccountingAdjustments us-gaap:StatementBusinessSegments

nov:CompletionAndProductionSolutions


Intangible
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.0-1.01.0-5.0
Percentage of IntangibleAssetsTranslationAndPurchaseAccountingAdjustments0.0-50.0100.055.6

nov:RigTechnologies


Intangible
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value2.03.01.0-2.01.0-4.0
Percentage of IntangibleAssetsTranslationAndPurchaseAccountingAdjustments100.0150.0100.022.216.728.6

nov:WellboreTechnologies


Intangible
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value0.00.0-1.0-2.00.03.0
Percentage of IntangibleAssetsTranslationAndPurchaseAccountingAdjustments0.00.0-100.022.20.0-21.4

nov:LineOfCreditFacilityCovenantTermsMaximumDebtToEquityPercentage us-gaap:CreditFacility

nov:LineOfCreditFacilityCovenantTermsMaximumDebtToEquityPercentage

us-gaap:ForeignLineOfCredit


Line
Period End2021-06-302021-03-312020-12-31
Value075.00
Percentage of LineOfCreditFacilityCovenantTermsMaximumDebtToEquityPercentage0.0100.00.0

nov:OtherComprehensiveIncomeLossCumulativeChangeInNetGainLossFromCashFlowHedgesTax

nov:OtherComprehensiveIncomeLossCumulativeChangeInNetGainLossFromCashFlowHedgesTax


Other
Period End2021-06-302021-03-312020-09-302020-06-30
Value-3.00.02.010.0
Percentage of OtherComprehensiveIncomeLossCumulativeChangeInNetGainLossFromCashFlowHedgesTax100.00.0100.0100.0

nov:PaymentOnRedemptionUnsecuredDebt us-gaap:DebtInstrument

nov:PaymentOnRedemptionUnsecuredDebt

nov:TwoPointSixZeroUnsecuredSeniorNotesDueTwoThousandAndTwentyTwo


Payment
Period End2020-08-25
Value226
Percentage of PaymentOnRedemptionUnsecuredDebt100.0

nov:PercentageAsOfOperatingProfitToRevenue

nov:PercentageAsOfOperatingProfitToRevenue


Percentage
Period End2021-03-312020-03-312019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-7.0-1.036-0.0250.0340.025-0.001-0.004-0.035-0.056-0.721-0.157-0.0860.0710.1120.1180.1770.1740.1490.1630.1370.1420.1690.1860.2040.2060.2020.1940.1980.2010.21
Percentage of PercentageAsOfOperatingProfitToRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nov:PercentageAsOfOperatingProfitToRevenue us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, nov:CompletionAndProductionSolutions


Percentage
Period End2021-03-312020-03-312019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-30
Value-3.9-1.501-0.060.0630.0540.0240.0650.0410.012-0.112-0.061-0.0680.0040.0890.0830.1550.1390.1370.160.12
Percentage of PercentageAsOfOperatingProfitToRevenue55.7144.9240.0185.3216.0-2400.0-1625.0-117.1-21.415.538.979.15.679.570.387.679.991.998.287.6

us-gaap:OperatingSegments, nov:RigTechnologies


Percentage
Period End2021-03-312020-03-312019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value-1.9-0.3630.0510.0910.0950.0370.0350.011
Percentage of PercentageAsOfOperatingProfitToRevenue27.135.0-204.0267.6380.0-3700.0-875.0-31.4

us-gaap:OperatingSegments, nov:WellboreTechnologies


Percentage
Period End2021-03-312020-03-312019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-30
Value-3.4-0.9590.0240.0470.0480.0170-0.039-0.103-0.179-0.286-0.144-0.0080.040.0670.1890.1820.1730.2190.151
Percentage of PercentageAsOfOperatingProfitToRevenue48.692.6-96.0138.2192.0-1700.0-0.0111.4183.924.8182.2167.4-11.335.756.8106.8104.6116.1134.4110.2

nov:PercentageOfPerformanceSharesAwarded us-gaap:AwardType

nov:PercentageOfPerformanceSharesAwarded

nov:NVA


Percentage
Period End2021-03-312020-03-312019-03-31
Value15.00.150.15
Percentage of PercentageOfPerformanceSharesAwarded100.0100.0100.0

nov:TSR


Percentage
Period End2021-03-312020-03-312019-03-31
Value85.00.850.85
Percentage of PercentageOfPerformanceSharesAwarded566.7566.7566.7

nov:PremiumOnRedemptionOfUnsecuredDebt us-gaap:DebtInstrument

nov:PremiumOnRedemptionOfUnsecuredDebt

nov:TwoPointSixZeroUnsecuredSeniorNotesDueTwoThousandAndTwentyTwo


Premium
Period End2020-08-25
Value7600000.0
Percentage of PremiumOnRedemptionOfUnsecuredDebt100.0

nov:ProvisionForInventoryLosses

nov:ProvisionForInventoryLosses


Provision
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-2.024196192712567265313148.09.0
Percentage of ProvisionForInventoryLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nov:WithholdingTaxes

nov:WithholdingTaxes


Withholding
Period End2021-03-312020-03-312019-03-31
Value-13.0-17.0-18.0
Percentage of WithholdingTaxes100.0100.0100.0

nov:WithholdingTaxes us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Withholding
Period End2021-03-312020-03-312019-03-31
Value-13.0-17.0-18.0
Percentage of WithholdingTaxes100.0100.0100.0

us-gaap:Parent


Withholding
Period End2021-03-312020-03-312019-03-31
Value-13.0-17.0-18.0
Percentage of WithholdingTaxes100.0100.0100.0

nov:WriteOffOfUnamortizedDiscountAndDebtIssuanceCost us-gaap:StatementScenario, us-gaap:LongtermDebtType

nov:WriteOffOfUnamortizedDiscountAndDebtIssuanceCost

srt:ScenarioForecast, nov:TwoPointSixZeroUnsecuredSeniorNotesDueDecemberTwoThousandTwentyTwo


Write
Period End2021-06-30
Value300000.0
Percentage of WriteOffOfUnamortizedDiscountAndDebtIssuanceCost100.0

us-gaap:ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice

us-gaap:ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice


Contract
Period End2021-06-302021-03-312020-12-31
Value6821-11.0
Percentage of ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice100.0100.0100.0

us-gaap:ContractWithCustomerAssetIncreaseDecreaseForContractAcquiredInBusinessCombination

us-gaap:ContractWithCustomerAssetIncreaseDecreaseForContractAcquiredInBusinessCombination


Contract
Period End2021-06-302021-03-312020-12-31
Value-188000000.0-226000000.0-253000000.0
Percentage of ContractWithCustomerAssetIncreaseDecreaseForContractAcquiredInBusinessCombination100.0100.0100.0

us-gaap:ContractWithCustomerAssetReclassifiedToReceivable

us-gaap:ContractWithCustomerAssetReclassifiedToReceivable


Contract
Period End2021-06-302021-03-312020-12-31
Value222205298
Percentage of ContractWithCustomerAssetReclassifiedToReceivable100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice

us-gaap:ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice


Contract
Period End2021-06-302021-03-312020-12-31
Value-76000000.0-4000000.016000000.0
Percentage of ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityIncreaseDecreaseForContractAcquiredInBusinessCombination

us-gaap:ContractWithCustomerLiabilityIncreaseDecreaseForContractAcquiredInBusinessCombination


Contract
Period End2021-06-302021-03-312020-12-31
Value288204206
Percentage of ContractWithCustomerLiabilityIncreaseDecreaseForContractAcquiredInBusinessCombination100.0100.0100.0

us-gaap:ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod

us-gaap:ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod


Contract
Period End2021-06-302021-03-312020-09-302019-12-312019-09-302018-12-312018-09-30
Value9.012158.0209.09.0
Percentage of ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1 us-gaap:CreditFacility

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1

us-gaap:ForeignLineOfCredit


Debt
Period End2021-03-312020-03-31
Value1.40.014
Percentage of DebtInstrumentBasisSpreadOnVariableRate1100.0100.0

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1 us-gaap:VariableRate

nov:CanadianDollarOfferedRateCDOR


Debt
Period End2021-03-312020-03-31
Value1.1250.01125
Percentage of DebtInstrumentBasisSpreadOnVariableRate180.480.4

us-gaap:DeferredIncomeTaxesAndTaxCredits

us-gaap:DeferredIncomeTaxesAndTaxCredits


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
Value-6.0-1.07.0-8.0-2.0-62.0-59.02.0-360.0-9.0-78.0-2.0125.0-357.0-3.0154.01872-153.0-135.0-136.0-148.033-7.0-264.021-95.038-242.024-82.0-33.0-137.0-11.0-68.0119-173.0-170.0-104.095-78.0-2.0-170.085
Percentage of DeferredIncomeTaxesAndTaxCredits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAndAmortization

us-gaap:DepreciationAndAmortization


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
Value7779828382105100102154177171172174173175174174175174176178175183184190190199198186195200191190174166157157148142140138135129127124127
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302011-03-312010-03-31
Value-1.0-4.024115.0-43.0-2.0-7.0-7.04.013-3.0-19.0-11.0-1.0
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash

us-gaap:DividendsCommonStockCash


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-31
Value0.00.00.00.00.01919201919191919191919191919191917317317417818519619819811111111111156565151515147474646424242460
Percentage of DividendsCommonStockCash0.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Effect
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value5.0-4.08.0-7.0-4.01.06.08.0-4.0-10.0-37.07.0-2.017
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeasePrincipalPayments


Finance
Period End2021-03-312020-03-312019-12-312019-09-302019-06-30
Value7.08.010.07.08.0
Percentage of FinanceLeasePrincipalPayments100.0100.0100.0100.0100.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss

us-gaap:GoodwillForeignCurrencyTranslationGainLoss


Goodwill
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value0.00.0-24.01.02.0-25.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss0.00.0100.0100.0100.0100.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss us-gaap:StatementBusinessSegments

nov:CompletionAndProductionSolutions


Goodwill
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value0.00.0-2.01.00.0-17.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss0.00.08.3100.00.068.0

nov:WellboreTechnologies


Goodwill
Period End2020-12-312020-09-302019-12-312019-09-30
Value0.00.00.0-3.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss0.00.00.012.0

us-gaap:GoodwillImpairmentLoss

us-gaap:GoodwillImpairmentLoss


Goodwill
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302016-12-312016-09-30
Value0.00.00.012954100.030990.0972
Percentage of GoodwillImpairmentLoss0.00.00.0100.0100.00.0100.00.0100.0

us-gaap:GoodwillImpairmentLoss us-gaap:StatementBusinessSegments

nov:CompletionAndProductionSolutions


Goodwill
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value0.00.00.05806.00.0
Percentage of GoodwillImpairmentLoss0.00.00.044.81.50.0

nov:RigTechnologies


Goodwill
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value0.00.00.0198920.0
Percentage of GoodwillImpairmentLoss0.00.00.015.322.40.0

nov:WellboreTechnologies


Goodwill
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302015-12-31
Value0.00.00.05173120.01485
Percentage of GoodwillImpairmentLoss0.00.00.039.976.10.00.0

us-gaap:ImpairmentOfIntangibleAssetsExcludingGoodwill

us-gaap:ImpairmentOfIntangibleAssetsExcludingGoodwill


Impairment
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value0.00.00.0292160.0
Percentage of ImpairmentOfIntangibleAssetsExcludingGoodwill0.00.00.0100.0100.00.0

us-gaap:ImpairmentOfIntangibleAssetsExcludingGoodwill us-gaap:StatementBusinessSegments

nov:CompletionAndProductionSolutions


Impairment
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value0.00.00.02140.00.0
Percentage of ImpairmentOfIntangibleAssetsExcludingGoodwill0.00.00.073.30.00.0

nov:WellboreTechnologies


Impairment
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value0.00.00.078160.0
Percentage of ImpairmentOfIntangibleAssetsExcludingGoodwill0.00.00.026.7100.00.0

us-gaap:ImpairmentOfLongLivedAssetsHeldForUse

us-gaap:ImpairmentOfLongLivedAssetsHeldForUse


Impairment
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value0.00.00.051310.0122187
Percentage of ImpairmentOfLongLivedAssetsHeldForUse0.00.00.0100.0100.0100.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.0-4.0-10.0-11.0-6.0-233.0-7.0-4.0-2.0-2.0-2.0-1.0-1.0-2.0-2.0-2.0-6.0-7.0-6.0-3.00.07.09.0169.02310.016131519157.01917121110.013148.08.06.0
Percentage of IncomeLossFromEquityMethodInvestments0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312011-09-30
Value-23.0-13.0-23.01433-15.0338.0-21.0-45.066-10.0-25.0-46.028-18.0-13.0-41.083-39.0-125.0-65.015188-407.01.01656.0-223.0-72.030412-156.051160-12.0303225
Percentage of IncreaseDecreaseInAccruedIncomeTaxesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-26.0-62.01747-32.0-142.0-12.0-10.062-234.05374-34.0-279.0-80.046-35.0-61.0-109.0-150.0-283.0-231.0-421.0-218.0-274.0-224.0
Percentage of IncreaseDecreaseInAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInContractWithCustomerAsset

us-gaap:IncreaseDecreaseInContractWithCustomerAsset


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-42.0-35.05641-132.05.0282246-26.0803731-80.0-23.0-82.0
Percentage of IncreaseDecreaseInContractWithCustomerAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInContractWithCustomerLiability


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value43-5.0-18.0-36.0-63.043-27.0-4.043-46.0-112.0-39.01277-8.0-49.0
Percentage of IncreaseDecreaseInContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value29-33.0164.0-33.0-9.0-4.020254.0-64.0-33.010.020-35.0-13.0-66.0-16.0-71.039-81.011-39.0-32.0-7.0-34.0-13.025-85.0133-48.042106-130.0-30.0866999-34.0-32.05951-30.09.019-13.0
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentIncomeInterest

us-gaap:InvestmentIncomeInterest


Investment
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
Value2.02.02.00.02.03.04.04.06.06.07.06.05.07.06.0114.04.04.03.03.05.05.02.02.05.05.04.05.04.04.02.03.03.02.02.03.03.05.05.04.04.04.04.03.02.0
Percentage of InvestmentIncomeInterest100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsNonredeemable

us-gaap:NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsNonredeemable


Noncontrolling
Period End2021-06-302021-03-312020-06-302020-03-31
Value-2000000.0-1000000.0-1000000.02000000.0
Percentage of NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsNonredeemable100.0100.0100.0100.0

us-gaap:NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsNonredeemable us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Noncontrolling
Period End2021-06-302021-03-312020-06-302020-03-31
Value-2000000.0-1000000.0-1000000.02000000.0
Percentage of NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsNonredeemable100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value37-19.073209.0-180.073-118.01820-79.0-32.0-223.036-18.01247690-176.0-18.0-46.0143-114.0-339.0107-418.0-284.0-310.0114-51.0-31.0154-121.0-117.03684-121.065-40.0-117.0286492-62.0-14.0
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-1.0-2.0231423-56.011-17.01.03.0-22.00.0
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312018-12-312018-09-302018-06-302018-03-31
Value36-21.0663432-236.0-108.0-38.0-236.052
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax-3600.01050.0287.0242.9139.1421.4490.90.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value37-19.073209.0-180.073-118.01820-73.0-38.0-223.036-18.01247690-176.0-18.0-46.0143-114.0-339.0107-418.0-295.0-311.0114-51.0-31.0154
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax-3700.0950.0317.4142.939.1321.4663.6694.11800.0666.7331.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax


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-4.0-2.0261633-52.017-14.03.04.0-22.02.0-14.013-7.025235.0-25.0602910216-19.092-66.0-123.0-99.0-25.014-15.048-22.0-48.0-173.064-53.06392-71.05.0
Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax


Other
Period End2021-06-302021-03-312020-12-31
Value37-19.0-3.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoncashIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312011-09-302010-12-312010-09-30
Value-19000000.0-25000000.077000000.0-22000000.0-26000000.0-45000000.0109000000.0-50000000.0-40000000.0-35000000.0136000000.0-55000000.0-55000000.0-19000000.0121000000.0-51000000.0-35000000.0-55000000.0173000000.0-86000000.0-112000000.0-83000000.0-20000000.0-74000000.0-71000000.0-91000000.0-1000000.0-53000000.0-66000000.0-61000000.09000000.0-56000000.0-19000000.0-18000000.0-8000000.0-33000000.01000000.0-37000000.0-19000000.0-111000000.0
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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-11000000.02000000.0-83000000.002000000.0-15000000.0-20000000.0-72000000.0-5000000.0-1000000.0-6000000.0-39000000.0-8000000.0-14000000.0-5000000.0-9000000.0-13000000.0-6000000.0-22000000.0-1000000.0-1000000.0-2000000.0-1000000.0-18000000.0-2000000.0-4000000.0-34000000.0-104000000.0-6000000.0-7000000.0-3000000.0-23000000.0-38000000.0-8000000.0-11000000.0-7000000.0-6000000.0-11000000.0-7000000.0-29000000.0-7000000.0-7000000.0-6000000.0-7000000.0-4000000.0-12000000.0
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDebtExtinguishmentCosts

us-gaap:PaymentsOfDebtExtinguishmentCosts


Payments
Period End2020-12-31
Value0.0
Percentage of PaymentsOfDebtExtinguishmentCosts0.0

us-gaap:PaymentsOfDebtExtinguishmentCosts us-gaap:LongtermDebtType

nov:TwoPointSixZeroUnsecuredSeniorNotesDueDecemberOneTwoThousandTwentyTwo


Payments
Period End2021-04-09
Value191
Percentage of PaymentsOfDebtExtinguishmentCosts0.0

us-gaap:PaymentsOfDebtExtinguishmentCosts us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

nov:TwoPointSixZeroUnsecuredSeniorNotesDueDecemberTwoThousandTwentyTwo, us-gaap:SubsequentEvent


Payments
Period End2021-04-09
Value191
Percentage of PaymentsOfDebtExtinguishmentCosts0.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-20.0-13.028-15.0-9.0-24.02.0-14.00.0-1.09.023211.0-8.0-12.011-1.02.04.0-9.0-5.0-1.02.0-3.0-11.0-3.010.02.0-10.04.00.013-14.04.05.0221002.014110.03.0
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Reclassification
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-3.0-2.0-10.0-4.0-6.0-3.0-2.0-1.00.0-2.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:AccumulatedOtherComprehensiveIncome


Reclassification
Period End2020-12-312020-09-302020-06-302020-03-312018-12-312018-09-302018-06-302018-03-31
Value-2.0-2.0-10.0-4.01.0-8.01.03.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax66.7100.0100.0100.00.0400.00.00.0

us-gaap:RedemptionPremium us-gaap:LongtermDebtType

us-gaap:RedemptionPremium

nov:TwoPointSixZeroUnsecuredSeniorNotesDueDecemberOneTwoThousandTwentyTwo


Redemption
Period End2021-04-09
Value6800000.0
Percentage of RedemptionPremium100.0

us-gaap:RedemptionPremium us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

nov:TwoPointSixZeroUnsecuredSeniorNotesDueDecemberTwoThousandTwentyTwo, us-gaap:SubsequentEvent


Redemption
Period End2021-04-09
Value6800000.0
Percentage of RedemptionPremium100.0

us-gaap:RepaymentsOfUnsecuredDebt us-gaap:DebtInstrument

us-gaap:RepaymentsOfUnsecuredDebt

nov:TwoPointSixZeroUnsecuredSeniorNotesDueTwoThousandAndTwentyTwo


Repayments
Period End2020-08-25
Value217
Percentage of RepaymentsOfUnsecuredDebt100.0

us-gaap:RepaymentsOfUnsecuredDebt us-gaap:LongtermDebtType

nov:TwoPointSixZeroUnsecuredSeniorNotesDueDecemberOneTwoThousandTwentyTwo


Repayments
Period End2021-04-09
Value182
Percentage of RepaymentsOfUnsecuredDebt0.0

us-gaap:RepaymentsOfUnsecuredDebt us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

nov:TwoPointSixZeroUnsecuredSeniorNotesDueDecemberTwoThousandTwentyTwo, us-gaap:SubsequentEvent


Repayments
Period End2021-04-09
Value182
Percentage of RepaymentsOfUnsecuredDebt0.0

us-gaap:RestructuringCharges us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:RestructuringCharges

us-gaap:OperatingSegments, nov:CompletionAndProductionSolutions


Restructuring
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value23121054791939110.0
Percentage of RestructuringCharges100.0100.0100.0100.0100.0100.00.0

us-gaap:OperatingSegments, nov:RigTechnologies


Restructuring
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value12202381944742.00.0
Percentage of RestructuringCharges52.2166.722.6245.624.418.20.0

us-gaap:OperatingSegments, nov:WellboreTechnologies


Restructuring
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value2662715413345-2.00.0
Percentage of RestructuringCharges113.0516.767.851.9172.5-18.20.0

us-gaap:RestructuringCharges us-gaap:RestructuringCostAndReserve

nov:FacilityClosures


Restructuring
Period End2020-09-30
Value20
Percentage of RestructuringCharges87.0

nov:GoodwillIndefiniteLivedAndFiniteLivedIntangibleAndLongLivedTangibleAssets


Restructuring
Period End2020-09-302020-06-302020-03-312019-06-30
Value0.00.018915373
Percentage of RestructuringCharges0.00.0179.4277.1

nov:InventoryCharges


Restructuring
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value201811426530211
Percentage of RestructuringCharges87.0150.010.8335.415.6100.0

nov:InventoryImpairmentsAndOtherItems


Restructuring
Period End2020-09-30
Value19
Percentage of RestructuringCharges82.6

nov:Severance


Restructuring
Period End2020-09-30
Value23
Percentage of RestructuringCharges100.0

nov:SeveranceFacilityClosuresAndOtherItems


Restructuring
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value339.0428418375.011
Percentage of RestructuringCharges0.00.0182.6700.01.746.80.3100.0

us-gaap:RestructuringCharges us-gaap:StatementBusinessSegments

us-gaap:IntersegmentElimination


Restructuring
Period End2020-09-302020-06-302019-09-302019-06-302018-09-30
Value1.08.00.0110.0
Percentage of RestructuringCharges4.366.70.00.60.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

nov:RestrictedStockAndRestrictedStockUnits


Share
Period End2021-02-222020-02-252019-02-272018-05-112018-02-282017-02-222016-02-242015-02-25
Value15.020.2328.7240.6535.0938.8628.2454.74
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStock


Share
Period End2021-05-202017-05-172016-11-152016-05-182015-08-282015-05-132014-05-14
Value16.533.3836.0431.4541.6551.8868.89
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.00.00.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue


Share
Period End2021-02-22
Value5.75
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice


Share
Period End2021-02-22
Value15.0
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice100.0

us-gaap:StockIssuedDuringPeriodSharesNewIssues us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesNewIssues

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-03-312019-03-312018-03-31
Value1000000.02000000.02000000.03000000.02000000.0
Percentage of StockIssuedDuringPeriodSharesNewIssues100.0100.0100.0100.0100.0

nov:AccruedPurchaseOrders

nov:AccruedPurchaseOrders


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value110110118128110130121117135119127128137142150202221236235280278432449773880886815840538562531648633493444407428439280405522601597853
Percentage of AccruedPurchaseOrders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nov:DeferredTaxAssetsAllowancesAndOperatingLiabilities

nov:DeferredTaxAssetsAllowancesAndOperatingLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value318395293355534491542-439.0368331344343364
Percentage of DeferredTaxAssetsAllowancesAndOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nov:DeferredTaxLiabilitiesCapitalLeases

nov:DeferredTaxLiabilitiesCapitalLeases


Deferred
Period End2020-12-312019-12-31
Value8086
Percentage of DeferredTaxLiabilitiesCapitalLeases100.0100.0

nov:DeferredTaxLiabilitiesTaxAccruedLiabilities

nov:DeferredTaxLiabilitiesTaxAccruedLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value333317175355107929270
Percentage of DeferredTaxLiabilitiesTaxAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nov:DeferredTaxLiabilitiesTaxOverBookDepreciation

nov:DeferredTaxLiabilitiesTaxOverBookDepreciation


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value60115139174267277236306268204
Percentage of DeferredTaxLiabilitiesTaxOverBookDepreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nov:DefinedBenefitPlanEstimatedFutureEmployerContributions

nov:DefinedBenefitPlanEstimatedFutureEmployerContributions


Defined
Period End2020-12-31
Value325
Percentage of DefinedBenefitPlanEstimatedFutureEmployerContributions100.0

nov:LeaseLiabilitiesCurrent

nov:LeaseLiabilitiesCurrent


Lease
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1051061101111151151141131161157.0
Percentage of LeaseLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nov:LeaseLiabilitiesNonCurrent

nov:LeaseLiabilitiesNonCurrent


Lease
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value595590612619637646674673696728222
Percentage of LeaseLiabilitiesNonCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nov:LineOfCreditFacilityCovenantComplianceDebtToCapitalizationPercentage

nov:LineOfCreditFacilityCovenantComplianceDebtToCapitalizationPercentage


Line
Period End2021-06-302021-03-312020-12-312020-09-30
Value27.229.028.427.4
Percentage of LineOfCreditFacilityCovenantComplianceDebtToCapitalizationPercentage100.0100.0100.0100.0

nov:OperatingLossCarryforwardTaxEffected

nov:OperatingLossCarryforwardTaxEffected


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value387270182182153
Percentage of OperatingLossCarryforwardTaxEffected100.0100.0100.0100.0100.0

nov:OperatingLossCarryforwardTaxEffected us-gaap:IncomeTaxAuthority

us-gaap:DomesticCountry


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value88497.05.08.0
Percentage of OperatingLossCarryforwardTaxEffected22.718.13.82.75.2

us-gaap:ForeignCountry


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value282212167169136
Percentage of OperatingLossCarryforwardTaxEffected72.978.591.892.988.9

us-gaap:StateAndLocalJurisdiction


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value179.08.08.09.0
Percentage of OperatingLossCarryforwardTaxEffected4.43.34.44.45.9

nov:OperatingLossCarryforwardsNetOfValuationAllowanceTaxEffected

nov:OperatingLossCarryforwardsNetOfValuationAllowanceTaxEffected


Operating
Period End2020-12-312019-12-312018-12-31
Value3.01.028
Percentage of OperatingLossCarryforwardsNetOfValuationAllowanceTaxEffected100.0100.0100.0

nov:OperatingLossCarryforwardsNetOfValuationAllowanceTaxEffected us-gaap:IncomeTaxAuthority

us-gaap:ForeignCountry


Operating
Period End2020-12-312019-12-312018-12-31
Value3.01.027
Percentage of OperatingLossCarryforwardsNetOfValuationAllowanceTaxEffected100.0100.096.4

nov:OutstandingLettersOfCreditUnderVariousBilateralCommittedLetterOfCreditFacilities

nov:OutstandingLettersOfCreditUnderVariousBilateralCommittedLetterOfCreditFacilities


Outstanding
Period End2021-06-302021-03-312020-12-312020-09-30
Value470444446490
Percentage of OutstandingLettersOfCreditUnderVariousBilateralCommittedLetterOfCreditFacilities100.0100.0100.0100.0

nov:PercentageOfInventoryReserve

nov:PercentageOfInventoryReserve


Percentage
Period End2020-12-312019-12-312018-12-312017-12-31
Value29.00.2770.1770.21
Percentage of PercentageOfInventoryReserve100.0100.0100.0100.0

nov:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableWeightedAverageExercisePrice us-gaap:AwardType

nov:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableWeightedAverageExercisePrice

us-gaap:StockAppreciationRightsSARS


Share
Period End2020-12-312019-12-312018-12-312017-12-31
Value28.4428.428.5728.33
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableWeightedAverageExercisePrice100.0100.0100.0100.0

us-gaap:AccrualForTaxesOtherThanIncomeTaxesCurrent

us-gaap:AccrualForTaxesOtherThanIncomeTaxesCurrent


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
Value1231111581231097411210199771241039784152133142121176148128127175169158159211181176128188136125105150113102811198991689395
Percentage of AccrualForTaxesOtherThanIncomeTaxesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedInsuranceCurrent

us-gaap:AccruedInsuranceCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value52494854585357545561557274779210110394971151131191151321261401321371311281191081081111051061037067504958
Percentage of AccruedInsuranceCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedSalesCommissionCurrent

us-gaap:AccruedSalesCommissionCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-03-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value202119333134343841455855556157576073
Percentage of AccruedSalesCommissionCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AccountingStandardsUpdate201613


Allowance
Period End2020-12-312020-09-30
Value102115
Percentage of AllowanceForDoubtfulAccountsReceivable100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent


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
Value10013216118720915912513212010710795
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerAssetNet

us-gaap:ContractWithCustomerAssetNet


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value534577611555508639643615585539565483445415495
Percentage of ContractWithCustomerAssetNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerAssetNetCurrent

us-gaap:ContractWithCustomerAssetNetCurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value534577611555508639643615585539565483445415495
Percentage of ContractWithCustomerAssetNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiability

us-gaap:ContractWithCustomerLiability


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value392349354371408470427455455412458570609598519
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet us-gaap:DebtInstrument

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

nov:TwoPointSixZeroUnsecuredSeniorNotesDueTwoThousandAndTwentyTwo


Debt
Period End2020-08-25
Value600000.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet100.0

us-gaap:DebtInstrumentUnamortizedPremium us-gaap:DebtInstrument

us-gaap:DebtInstrumentUnamortizedPremium

nov:TwoPointSixZeroUnsecuredSeniorNotesDueTwoThousandAndTwentyTwo


Debt
Period End2020-08-25
Value7600000.0
Percentage of DebtInstrumentUnamortizedPremium100.0

us-gaap:DebtInstrumentUnamortizedPremium us-gaap:LongtermDebtType

nov:TwoPointSixZeroUnsecuredSeniorNotesDueDecemberOneTwoThousandTwentyTwo


Debt
Period End2021-06-30
Value6800000.0
Percentage of DebtInstrumentUnamortizedPremium0.0

us-gaap:DebtInstrumentUnamortizedPremium us-gaap:StatementScenario, us-gaap:LongtermDebtType

srt:ScenarioForecast, nov:TwoPointSixZeroUnsecuredSeniorNotesDueDecemberTwoThousandTwentyTwo


Debt
Period End2021-06-30
Value6800000.0
Percentage of DebtInstrumentUnamortizedPremium0.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value2844619661110175020962281260423302066
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value387270182182153170118-51.0251410.07.06.0
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value1226095781642115-39.0149151752822
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value4117027681002405166
Percentage of DeferredTaxAssetsTaxCreditCarryforwards100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost


Deferred
Period End2020-12-312019-12-312018-12-31
Value616966
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value49110688716114813231304175714481398130714131542
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value155252929720937716420816821198182
Percentage of DeferredTaxLiabilitiesOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value476570111185232257285314226456363215
Percentage of DeferredTaxLiabilitiesTaxDeferredIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value637597572630617
Percentage of DefinedBenefitPlanAccumulatedBenefitObligation100.0100.0100.0100.0100.0

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
Value435345629290
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
Value641600575633622703
Percentage of DefinedBenefitPlanBenefitObligation1490.71132.11277.81021.0676.1781.1

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive


Defined
Period End2020-12-31
Value34
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive100.0

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets


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
Value582568517588543601660706517419203193
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:DefinedBenefitPlanByPlanAssetCategories

us-gaap:DebtSecurities


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
Value2532272092842622593231721391005853
Percentage of DefinedBenefitPlanFairValueOfPlanAssets43.540.040.448.348.343.148.924.426.923.928.627.5

us-gaap:EquitySecurities


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
Value1081571401611811861162962042126670
Percentage of DefinedBenefitPlanFairValueOfPlanAssets18.627.627.127.433.330.917.641.939.550.632.536.3

us-gaap:OtherContract


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
Value2211841681431001562212381741075432
Percentage of DefinedBenefitPlanFairValueOfPlanAssets38.032.432.524.318.426.033.533.733.725.526.616.6

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

us-gaap:DebtSecurities, us-gaap:FairValueInputsLevel2


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value253227209284262259323172139100
Percentage of DefinedBenefitPlanFairValueOfPlanAssets43.540.040.448.348.343.148.924.426.923.9

us-gaap:EquitySecurities, us-gaap:FairValueInputsLevel2


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value108157140161181186116296204212
Percentage of DefinedBenefitPlanFairValueOfPlanAssets18.627.627.127.433.330.917.641.939.550.6

us-gaap:OtherContract, us-gaap:FairValueInputsLevel2


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1551211138247571131317430
Percentage of DefinedBenefitPlanFairValueOfPlanAssets26.621.321.913.98.79.517.118.614.37.2

us-gaap:OtherContract, us-gaap:FairValueInputsLevel3


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value66635561539910810710077
Percentage of DefinedBenefitPlanFairValueOfPlanAssets11.311.110.610.49.816.516.415.219.318.4

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value516505462527490502552599417342
Percentage of DefinedBenefitPlanFairValueOfPlanAssets88.788.989.489.690.283.583.684.880.781.6

us-gaap:FairValueInputsLevel3


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value6663556153991081071007732
Percentage of DefinedBenefitPlanFairValueOfPlanAssets11.311.110.610.49.816.516.415.219.318.415.8

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:RetirementPlanType

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value584568517588543601
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.3100.0100.0100.0100.0100.0

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-43000000.0-53000000.0-45000000.0-62000000.0-92000000.0
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-57000000.0-32000000.0-58000000.0-45000000.0-79000000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan132.660.4128.972.685.9

us-gaap:DepositLiabilitiesAccruedInterest us-gaap:LongtermDebtType

us-gaap:DepositLiabilitiesAccruedInterest

nov:TwoPointSixZeroUnsecuredSeniorNotesDueDecemberOneTwoThousandTwentyTwo


Deposit
Period End2021-04-09
Value1700000.0
Percentage of DepositLiabilitiesAccruedInterest100.0

us-gaap:DepositLiabilitiesAccruedInterest us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

nov:TwoPointSixZeroUnsecuredSeniorNotesDueDecemberTwoThousandTwentyTwo, us-gaap:SubsequentEvent


Deposit
Period End2021-04-09
Value1700000.0
Percentage of DepositLiabilitiesAccruedInterest100.0

us-gaap:DerivativeFairValueOfDerivativeAsset

us-gaap:DerivativeFairValueOfDerivativeAsset


Derivative
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
Value232746191527185.06.04.06.018214233422680625143362639545653364968596334451058117782642959047104
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeFairValueOfDerivativeAsset us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:OtherAssets, us-gaap:ForeignExchangeContract, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value126.05.03.04.03.03.0118.0146.01.06.0192.01.08.06.08.06.09.0135.0122.08.024221.01.0
Percentage of DerivativeFairValueOfDerivativeAsset26.131.633.311.122.216.714.326.224.233.323.11.29.744.25.62.614.810.715.116.718.419.18.519.05.917.822.927.25.93.8

us-gaap:OtherAssets, us-gaap:ForeignExchangeContract, us-gaap:Nondesignated


Derivative
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-09-302018-06-302018-03-312017-12-312017-09-302016-06-302014-09-302014-06-302014-03-31
Value3.01.01.02.01.01.01.03.01.02.02.02.07.00.01.01.0
Percentage of DerivativeFairValueOfDerivativeAsset11.15.36.77.45.620.016.716.74.84.86.14.816.30.02.01.5

us-gaap:PrepaidExpensesAndOtherCurrentAssets, us-gaap:ForeignExchangeContract, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value184.0174.03.07.05.03.01.02.02.08.0122313208.03.024285.05.05.0132321189.0183335361257
Percentage of DerivativeFairValueOfDerivativeAsset78.314.837.021.120.025.927.860.016.750.033.344.457.154.839.447.630.83.838.754.911.613.919.233.342.637.534.025.036.748.559.357.135.354.3

us-gaap:PrepaidExpensesAndOtherCurrentAssets, us-gaap:ForeignExchangeContract, us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value5.020178.06.0158.01.04.02.04.04.05.06.010.06.0127632231229212523292721212119152024
Percentage of DerivativeFairValueOfDerivativeAsset21.774.137.042.140.055.644.420.066.750.066.722.223.814.330.314.346.295.051.645.127.980.680.864.142.651.850.958.342.930.932.223.858.822.9

us-gaap:DerivativeFairValueOfDerivativeAsset us-gaap:HedgingDesignation

us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value184.02910.08.010.09.03.01.02.02.01115342134144.03028247.05.014312726152746404814308164115117288240
Percentage of DerivativeFairValueOfDerivativeAsset78.314.863.052.653.337.050.060.016.750.033.361.171.481.063.681.053.85.048.454.955.819.419.235.957.448.249.141.755.167.667.876.241.266.777.179.064.765.465.466.786.385.1

us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value5.023179.07.0179.02.05.02.04.07.06.08.0128.012763223192921252329272122221915201524176.0279.014137.0
Percentage of DerivativeFairValueOfDerivativeAsset21.785.237.047.446.763.050.040.083.350.066.738.928.619.036.419.046.295.051.645.144.280.680.864.142.651.850.958.344.932.432.223.858.833.322.921.035.334.634.633.313.714.9

us-gaap:DerivativeFairValueOfDerivativeLiability

us-gaap:DerivativeFairValueOfDerivativeLiability


Derivative
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
Value10.08.0153356118264723313616159.01110.02155774310913728633534151939918638244026745219347433965520232355
Percentage of DerivativeFairValueOfDerivativeLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeFairValueOfDerivativeLiability us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:OtherLiabilities, us-gaap:ForeignExchangeContract, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value2.07.0212.09.03.07.0112.02.02.03.01.02.0114.05.02564509810245133.09.010.0155.01.01.06.013
Percentage of DerivativeFairValueOfDerivativeLiability6.112.517.87.719.113.022.630.612.513.318.230.04.83.614.33.73.68.719.114.718.925.624.234.212.522.538.520.39.65.32.98.113.5

us-gaap:DerivativeFairValueOfDerivativeLiability us-gaap:DerivativeInstrumentRisk, us-gaap:FinancialInstrument, us-gaap:HedgingDesignation

us-gaap:ForeignExchangeContract, us-gaap:AccruedLiabilities, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1.06.01119356518291616175.03.0
Percentage of DerivativeFairValueOfDerivativeLiability10.075.073.357.662.555.169.261.769.651.647.231.227.3

us-gaap:ForeignExchangeContract, us-gaap:AccruedLiabilities, us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value9.02.04.01214326.09.04.08.06.08.05.0
Percentage of DerivativeFairValueOfDerivativeLiability90.025.026.736.425.027.123.119.117.425.816.750.045.5

us-gaap:DerivativeFairValueOfDerivativeLiability us-gaap:HedgingDesignation

us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1.06.01121428620381923287.08.03.05.05.09.0314827921122372552433733061422611271847296.017502075451313
Percentage of DerivativeFairValueOfDerivativeLiability10.075.073.363.675.072.976.980.982.674.277.843.853.333.345.550.042.956.462.362.884.481.882.976.171.371.976.776.368.445.867.569.263.555.831.650.067.660.678.181.865.056.5

us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value9.02.04.01214326.09.04.08.08.09.07.06.06.05.012242916172549809814693441213138.02723131724132110.07.010.0
Percentage of DerivativeFairValueOfDerivativeLiability90.025.026.736.425.027.123.119.117.425.822.256.246.766.754.550.057.143.637.737.215.618.217.123.928.728.123.323.731.654.232.530.836.544.268.450.032.439.421.918.235.043.5

us-gaap:DerivativeInstrumentsAndHedgesLiabilities

us-gaap:DerivativeInstrumentsAndHedgesLiabilities


Derivative
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
Value10.08.015314997243820242313138.08.07.02053664310413226127129042029714025213116594718336832834719222261
Percentage of DerivativeInstrumentsAndHedgesLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value193195196176158176270256258189331281227214345314237222181195232249241295331353662503419348516424389321511349321269468358288263403272
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized


Employee
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value12172536459569747868
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType

us-gaap:RestrictedStock


Employee
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value801021089910157445437
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized666.7600.0432.0275.0224.460.063.873.047.4

us-gaap:EquityMethodInvestments

us-gaap:EquityMethodInvestments


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value454751596657282291294299301304308312309309306302307311314324327331327360362356351402390373357410393370365409391371361402386393
Percentage of EquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiability


Finance
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value264280285293284285
Percentage of FinanceLeaseLiability100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityCurrent


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value252528293132303028247.0
Percentage of FinanceLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityNoncurrent


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value224229236240246252250255265260222
Percentage of FinanceLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDue


Finance
Period End2020-12-31
Value354
Percentage of FinanceLeaseLiabilityPaymentsDue100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive


Finance
Period End2020-12-31
Value228
Percentage of FinanceLeaseLiabilityPaymentsDueAfterYearFive100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths


Finance
Period End2020-12-31
Value36
Percentage of FinanceLeaseLiabilityPaymentsDueNextTwelveMonths100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive


Finance
Period End2020-12-31
Value18
Percentage of FinanceLeaseLiabilityPaymentsDueYearFive100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour


Finance
Period End2020-12-31
Value19
Percentage of FinanceLeaseLiabilityPaymentsDueYearFour100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree


Finance
Period End2020-12-31
Value23
Percentage of FinanceLeaseLiabilityPaymentsDueYearThree100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo


Finance
Period End2020-12-31
Value30
Percentage of FinanceLeaseLiabilityPaymentsDueYearTwo100.0

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount


Finance
Period End2020-12-31
Value90
Percentage of FinanceLeaseLiabilityUndiscountedExcessAmount100.0

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseRightOfUseAsset


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value183187195199207211230236246247249
Percentage of FinanceLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent


Finance
Period End2020-12-312019-12-31
Value3.924.58
Percentage of FinanceLeaseWeightedAverageDiscountRatePercent100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
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
Value52862034843143280424712115174913861081-805.0-560.0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

nov:OtherFiniteLivedIntangibleAssets


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312010-12-312009-12-31
Value59145377324640576510407327-174.0-121.0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization11.223.410.810.322.823.324.123.323.621.621.6

us-gaap:CustomerRelationships


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312010-12-312009-12-31
Value300305235221181874163013791147907-536.0-366.0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization56.849.267.567.466.866.065.265.665.466.665.4

us-gaap:Patents


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value5347414384345
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization10.07.611.912.212.3

us-gaap:Trademarks


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312010-12-312009-12-31
Value116123341317290265226195152-95.0-73.0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization22.019.89.810.110.310.710.711.111.011.813.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths


Finite
Period End2020-12-31
Value43
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive


Finite
Period End2020-12-31
Value25
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour


Finite
Period End2020-12-31
Value28
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree


Finite
Period End2020-12-31
Value33
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo


Finite
Period End2020-12-31
Value40
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0

us-gaap:ForeignCurrencyCashFlowHedgeDerivativeAtFairValueNet us-gaap:FinancialInstrument

us-gaap:ForeignCurrencyCashFlowHedgeDerivativeAtFairValueNet

us-gaap:ForwardContracts


Foreign
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value17600176001760017600176001760017600176001760017600411838751.0193029292.02.037522.0
Percentage of ForeignCurrencyCashFlowHedgeDerivativeAtFairValueNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillImpairedAccumulatedImpairmentLoss

us-gaap:GoodwillImpairedAccumulatedImpairmentLoss


Goodwill
Period End2020-12-312020-09-302019-06-302019-03-312016-09-30
Value72617261555624571485
Percentage of GoodwillImpairedAccumulatedImpairmentLoss100.0100.0100.0100.0100.0

us-gaap:IncomeTaxesReceivable

us-gaap:IncomeTaxesReceivable


Income
Period End2020-09-30
Value112
Percentage of IncomeTaxesReceivable100.0

us-gaap:IntangibleAssetsGrossExcludingGoodwill

us-gaap:IntangibleAssetsGrossExcludingGoodwill


Intangible
Period End2020-12-312019-12-312018-12-312017-12-31
Value1055147265046444
Percentage of IntangibleAssetsGrossExcludingGoodwill100.0100.0100.0100.0

us-gaap:IntangibleAssetsGrossExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass

nov:OtherFiniteLivedIntangibleAssets


Intangible
Period End2020-12-312019-12-312018-12-312017-12-31
Value94283491499
Percentage of IntangibleAssetsGrossExcludingGoodwill8.919.27.57.7

us-gaap:CustomerRelationships


Intangible
Period End2020-12-312019-12-312018-12-312017-12-31
Value47559840784074
Percentage of IntangibleAssetsGrossExcludingGoodwill45.040.662.763.2

us-gaap:Patents


Intangible
Period End2020-12-312019-12-312018-12-312017-12-31
Value115121661602
Percentage of IntangibleAssetsGrossExcludingGoodwill10.98.210.29.3

us-gaap:Trademarks


Intangible
Period End2020-12-312019-12-312018-12-312017-12-31
Value175190891885
Percentage of IntangibleAssetsGrossExcludingGoodwill16.612.913.713.7

us-gaap:IntangibleAssetsGrossExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:TradeNames


Intangible
Period End2020-12-312019-12-312018-12-312017-12-31
Value196280383384
Percentage of IntangibleAssetsGrossExcludingGoodwill18.619.05.96.0

us-gaap:InterestPayableCurrent

us-gaap:InterestPayableCurrent


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value6.0237.0237.0258.0277.0277.0277.0277.0297.0298.0298.0298.02911301130113011311235149.07.09.07.08.05.0141111
Percentage of InterestPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryAdjustments

us-gaap:InventoryAdjustments


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value5095515776207438598431047907634500370396338281270206
Percentage of InventoryAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryFinishedGoodsNetOfReserves

us-gaap:InventoryFinishedGoodsNetOfReserves


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value12361323142315561860198320992396260619481871195019311882183420011904182318032418261628992977313731853119299930002900359036303830384338253718359332342542227122511845175717741425
Percentage of InventoryFinishedGoodsNetOfReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryGross

us-gaap:InventoryGross


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value1831190819852365267228913040358437653620
Percentage of InventoryGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryRawMaterialsAndSuppliesNetOfReserves

us-gaap:InventoryRawMaterialsAndSuppliesNetOfReserves


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value362353373434478531577676637627614627655659656719786903961104510661040106911431227125012551315126714141175119112251246126812451167993907823772721661739
Percentage of InventoryRawMaterialsAndSuppliesNetOfReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryValuationReserves

us-gaap:InventoryValuationReserves


Inventory
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value5778436448001017500
Percentage of InventoryValuationReserves100.0100.0100.0100.0100.0100.0

us-gaap:InventoryWorkInProcessNetOfReserves

us-gaap:InventoryWorkInProcessNetOfReserves


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value233232189375334377364512522556501600572605513499517528561698605595632892982100910271149103165579810571015106490511511100993852833113910929531326
Percentage of InventoryWorkInProcessNetOfReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2020-12-31
Value101
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0

us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity us-gaap:CreditFacility

us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity

us-gaap:RevolvingCreditFacility


Line
Period End2021-04-08
Value2000
Percentage of LineOfCreditFacilityCurrentBorrowingCapacity100.0

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity


Line
Period End2021-06-302021-03-312020-12-312020-09-302012-12-312012-09-302012-09-28
Value2000200020002000256215723500
Percentage of LineOfCreditFacilityRemainingBorrowingCapacity100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity us-gaap:CreditFacility

us-gaap:RevolvingCreditFacility


Line
Period End2021-04-08
Value1655
Percentage of LineOfCreditFacilityRemainingBorrowingCapacity0.0

us-gaap:LongTermDebtFairValue us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:LongtermDebtType

us-gaap:LongTermDebtFairValue

us-gaap:FairValueInputsLevel2, us-gaap:UnsecuredDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1610169018331648183314451947242223552305221122872346
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive


Long
Period End2020-12-31
Value1620
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive


Long
Period End2020-12-31
Value14
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour


Long
Period End2020-12-31
Value4000000.0
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree


Long
Period End2020-12-31
Value13
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo


Long
Period End2020-12-31
Value183
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2020-12-312019-12-31
Value4.934.48
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0

us-gaap:OperatingLossCarryforwards

us-gaap:OperatingLossCarryforwards


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312010-12-31
Value1857121389381669920
Percentage of OperatingLossCarryforwards100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:DomesticCountry


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value4192343422242120202020
Percentage of OperatingLossCarryforwards22.619.33.82.73.40.00.00.00.00.0

us-gaap:ForeignCountry


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value11338257156495067653811707634
Percentage of OperatingLossCarryforwards61.068.080.179.572.40.00.00.00.00.0

us-gaap:StateAndLocalJurisdiction


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value305154144145169
Percentage of OperatingLossCarryforwards16.412.716.117.824.2

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority, us-gaap:TaxCreditCarryforward

us-gaap:DomesticCountry, nov:OperatingLossCarryforwardNoExpiration


Operating
Period End2020-12-312019-12-31
Value368198
Percentage of OperatingLossCarryforwards19.816.3

us-gaap:DomesticCountry, nov:OperatingLossCarryforwardsExpirationPeriodOne


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value6.06.06.06.08.0
Percentage of OperatingLossCarryforwards0.30.50.70.71.1

us-gaap:DomesticCountry, nov:OperatingLossCarryforwardsExpirationPeriodTwo


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value4530161616
Percentage of OperatingLossCarryforwards2.42.51.82.02.3

us-gaap:ForeignCountry, nov:OperatingLossCarryforwardNoExpiration


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value55740642837226130922881
Percentage of OperatingLossCarryforwards30.033.547.945.637.30.00.00.0

us-gaap:ForeignCountry, nov:OperatingLossCarryforwardsExpirationPeriodOne


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value14873515778
Percentage of OperatingLossCarryforwards8.06.05.77.011.2

us-gaap:ForeignCountry, nov:OperatingLossCarryforwardsExpirationPeriodTwo


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value428346142123102
Percentage of OperatingLossCarryforwards23.028.515.915.114.6

us-gaap:StateAndLocalJurisdiction, nov:OperatingLossCarryforwardsExpirationPeriodOne


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2.04.02.02.01.0
Percentage of OperatingLossCarryforwards0.10.30.20.20.1

us-gaap:StateAndLocalJurisdiction, nov:OperatingLossCarryforwardsExpirationPeriodTwo


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value303150201614
Percentage of OperatingLossCarryforwards16.312.42.22.02.0

us-gaap:OperatingLossCarryforwards us-gaap:TaxCreditCarryforward

nov:CarryForwardExpirationYearFour


Operating
Period End2020-12-312019-12-312018-12-31
Value23142142
Percentage of OperatingLossCarryforwards1.211.715.9

nov:CarryForwardExpirationYearOne


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1411110.0141141
Percentage of OperatingLossCarryforwards7.60.91.117.320.2

nov:CarryForwardExpirationYearThree


Operating
Period End2020-12-312019-12-312018-12-312017-12-31
Value95285286219
Percentage of OperatingLossCarryforwards5.123.532.026.8

nov:CarryForwardExpirationYearTwo


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value145141141287252
Percentage of OperatingLossCarryforwards7.811.615.835.236.1

nov:OperatingLossCarryforwardNoExpiration


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value925604428372261
Percentage of OperatingLossCarryforwards49.849.847.945.637.3

nov:OperatingLossCarryforwardsExpirationPeriodOne


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value15683596587
Percentage of OperatingLossCarryforwards8.46.86.68.012.4

nov:OperatingLossCarryforwardsExpirationPeriodTwo


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value776526178155132
Percentage of OperatingLossCarryforwards41.843.419.919.018.9

us-gaap:OperatingLossCarryforwardsValuationAllowance

us-gaap:OperatingLossCarryforwardsValuationAllowance


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312010-12-31
Value3842691541571207.0
Percentage of OperatingLossCarryforwardsValuationAllowance100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLossCarryforwardsValuationAllowance us-gaap:IncomeTaxAuthority

us-gaap:DomesticCountry


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value88496.04.07.05.07.07.07.07.0
Percentage of OperatingLossCarryforwardsValuationAllowance22.918.23.92.55.80.00.00.00.00.0

us-gaap:ForeignCountry


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value279211140145112584122165.0
Percentage of OperatingLossCarryforwardsValuationAllowance72.778.490.992.493.30.00.00.00.00.0

us-gaap:StateAndLocalJurisdiction


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value179.08.08.01.0
Percentage of OperatingLossCarryforwardsValuationAllowance4.43.35.25.10.8

us-gaap:OtherLongTermDebt

us-gaap:OtherLongTermDebt


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value10387706048219.023223423223223423623623724019619645452222233.05.06.07.07.08.07.07.013129.09.0111214-853.026
Percentage of OtherLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherLongTermDebt us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Other
Period End2021-03-312020-12-312020-09-302020-06-30
Value25242417
Percentage of OtherLongTermDebt28.734.340.035.4

us-gaap:RevenueRemainingPerformanceObligation

us-gaap:RevenueRemainingPerformanceObligation


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-31
Value3867363236933718391935584286715181340826102523
Percentage of RevenueRemainingPerformanceObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SeniorNotes

us-gaap:SeniorNotes


Senior
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1583176417641764198119811980248324822482248124812480
Percentage of SeniorNotes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SeniorNotes us-gaap:DebtInstrument

nov:SeniorNotesDueOnDecemberOneTwoThousandFortyTwo


Senior
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value1089108910891089108910891088108910881088108810881088108810881087108710871087108710871087109610961096
Percentage of SeniorNotes68.861.761.761.755.055.054.90.00.043.843.843.843.943.943.90.00.00.00.00.00.00.00.00.00.0

nov:SeniorNotesDueOnDecemberOneTwoThousandTwentyNine


Senior
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value494493493493493493493
Percentage of SeniorNotes31.227.927.927.924.924.924.9

nov:SeniorNotesDueOnDecemberOneTwoThousandTwentyTwo


Senior
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value182182182399399399139513951395139413941393139313921392139213911391139013901390139613961396
Percentage of SeniorNotes10.310.310.320.120.120.20.00.056.256.256.256.156.156.10.00.00.00.00.00.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

nov:RestrictedStockAndRestrictedStockUnits


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value31.8533.134.4137.0441.161.53
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0

us-gaap:StockAppreciationRightsSARS


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value28.428.4528.4928.4128.32
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue89.286.082.876.768.9

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant

nov:TwoThousandEighteenLongTermIncentivePlan


Share
Period End2020-12-312018-09-30
Value2417
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value49.2550.4954.1355.061.5660.355.0653.4643.9938.4736.3133.1426.17
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1


Sharebased
Period End2020-12-312019-12-312018-12-31
Value49.2550.4954.13
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1100.0100.0100.0

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

nov:RangeOne


Sharebased
Period End2020-12-312019-12-312018-12-31
Value40.6841.5844.14
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice182.682.481.5

nov:RangeThree


Sharebased
Period End2020-12-312019-12-312018-12-31
Value75.9675.9675.95
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1154.2150.4140.3

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1


Sharebased
Period End2020-12-312019-12-312018-12-31
Value45.747.6848.88
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1100.0100.0100.0

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

nov:RangeOne


Sharebased
Period End2020-12-312019-12-312018-12-31
Value37.6539.7740.68
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance182.483.483.2

nov:RangeThree


Sharebased
Period End2020-12-312019-12-312018-12-31
Value75.9675.9675.95
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1166.2159.3155.4

us-gaap:StandardProductWarrantyAccrualCurrent

us-gaap:StandardProductWarrantyAccrualCurrent


Standard
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
Value7879878584869097101102105114120129135147161169172190208226244257261284272267267248228222205188194210216209211232230213215217114
Percentage of StandardProductWarrantyAccrualCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TaxCreditCarryforwardAmount

us-gaap:TaxCreditCarryforwardAmount


Tax
Period End2020-12-31
Value404
Percentage of TaxCreditCarryforwardAmount100.0

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value11111232155.0
Percentage of UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued100.0100.0100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate


Unrecognized
Period End2020-09-302020-06-30
Value9090
Percentage of UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate100.0100.0

us-gaap:ValuationAllowancesAndReservesBalance us-gaap:ValuationAllowancesAndReservesType

us-gaap:ValuationAllowancesAndReservesBalance

us-gaap:AllowanceForCreditLoss


Valuation
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value100132161187209159
Percentage of ValuationAllowancesAndReservesBalance100.0100.0100.0100.0100.0100.0

us-gaap:InventoryValuationReserve


Valuation
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value5778436448001017500370396338
Percentage of ValuationAllowancesAndReservesBalance577.0638.6400.0427.8486.6314.50.00.00.0

us-gaap:ReserveForEnvironmentalCosts


Valuation
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value90104663843
Percentage of ValuationAllowancesAndReservesBalance90.078.841.020.320.6

us-gaap:ValuationAllowanceOfDeferredTaxAssets


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
Value109311759551202544634813393139.08.010.014
Percentage of ValuationAllowancesAndReservesBalance1093.0890.2593.2642.8260.339.60.00.00.00.00.00.00.00.0

us-gaap:WarrantyReserves


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
Value879010513517224427222819421121521711492
Percentage of ValuationAllowancesAndReservesBalance87.068.265.272.282.3153.50.00.00.00.00.00.00.00.0

Line plots across dimensions of each concept


Operating Margin
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Operating  Marginus-gaap: Consolidation Items, us-gaap: Statement Business Segments
TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
us-gaap:OperatingIncomeLoss
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Operating Income Lossus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents
(None,)
Other Comprehensive Income Loss Net Of Taxus-gaap: Statement Equity Components
us-gaap:ProfitLoss
us-gaap:StatementEquityComponents
(None,)
Profit Lossus-gaap: Statement Equity Components
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:StatementGeographical, us-gaap:Subsegments
(None, 'nov:Continental')
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Statement Geographical, us-gaap: Subsegments
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:StatementGeographical, us-gaap:Subsegments
(None, 'nov:LandAndOffshore')
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Statement Geographical, us-gaap: Subsegments
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ConsolidationItems
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Consolidation Items
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ConsolidationItems, us-gaap:StatementGeographical, us-gaap:Subsegments
('us-gaap:OperatingSegments', None, 'nov:LandAndOffshore')
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Consolidation Items, us-gaap: Statement Geographical, us-gaap: Subsegments
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ConsolidationItems, us-gaap:StatementGeographical, us-gaap:Subsegments
('us-gaap:OperatingSegments', None, 'nov:Continental')
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Consolidation Items, us-gaap: Statement Geographical, us-gaap: Subsegments
us-gaap:Assets
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Assetsus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Property Plant And Equipment Grossus-gaap: Property Plant And Equipment By Type
us-gaap:AmortizationOfIntangibleAssets
us-gaap:StatementBusinessSegments
(None,)
Amortization Of Intangible Assetsus-gaap: Statement Business Segments
us-gaap:PropertyPlantAndEquipmentNet
us-gaap:StatementGeographical
(None,)
Property Plant And Equipment Netus-gaap: Statement Geographical
us-gaap:Goodwill
us-gaap:StatementBusinessSegments
(None,)
Goodwillus-gaap: Statement Business Segments
us-gaap:Goodwill
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Goodwillus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:Goodwill
us-gaap:Subsegments
(None,)
Goodwillus-gaap: Subsegments
us-gaap:IntangibleAssetsNetExcludingGoodwill
us-gaap:StatementBusinessSegments
(None,)
Intangible Assets Net Excluding Goodwillus-gaap: Statement Business Segments
us-gaap:IntangibleAssetsNetExcludingGoodwill
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
(None,)
Intangible Assets Net Excluding Goodwillus-gaap: Finite Lived Intangible Assets By Major Class
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents
(None,)
Stockholders Equity Including Portion Attributable To Noncontrolling Interestus-gaap: Statement Equity Components
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents
(None,)
Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Valueus-gaap: Statement Equity Components
us-gaap:ProfitLoss
us-gaap:StatementEquityComponents
(None,)
Profit Lossus-gaap: Statement Equity Components