IOSP


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

Table of contents



us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted
us-gaap:AwardType
us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:CostOfGoodsAndServicesSold

us-gaap:GrossProfit
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:InterestIncomeExpenseNonoperatingNet

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:OperatingExpenses

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

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

us-gaap:ResearchAndDevelopmentExpense

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

us-gaap:SellingGeneralAndAdministrativeExpense

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

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:ReceivablesNetCurrent

us-gaap:InventoryNet

us-gaap:InventoryFinishedGoods

us-gaap:OtherAssetsCurrent

us-gaap:NoncurrentAssets
us-gaap:StatementGeographical

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:BalanceSheetLocation
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
us-gaap:BalanceSheetLocation

us-gaap:AmortizationOfIntangibleAssets

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:BalanceSheetLocation
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:Goodwill
us-gaap:StatementBusinessSegments

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:AccruedIncomeTaxesCurrent

us-gaap:AccruedLiabilitiesCurrent
us-gaap:AwardType

us-gaap:LiabilitiesCurrent

us-gaap:LongTermDebtCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:LongTermDebt
us-gaap:CreditFacility
us-gaap:LongtermDebtType

us-gaap:LongTermDebtNoncurrent

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:MinorityInterest

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:TreasuryStockValue

us-gaap:MinorityInterest

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:DepreciationDepletionAndAmortization

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation
us-gaap:AwardType

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsOfDividends

us-gaap:Dividends
us-gaap:StatementEquityComponents

us-gaap:PaymentsForRepurchaseOfCommonStock
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits
us-gaap:IncomeTaxAuthorityName
us-gaap:IncomeTaxAuthorityName, us-gaap:ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItem
us-gaap:ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItem
us-gaap:StatementGeographical

us-gaap:DeferredTaxAssetsValuationAllowance

iosp:AmortizationOfFiniteLivedIntangibleAssetsTranslationAdjustments
us-gaap:ConsolidationItems
iosp:CorporateCosts
us-gaap:CreditFacility
iosp:DeferredFinanceCostsCapitalized
us-gaap:RetirementPlanSponsorLocation
iosp:DefinedBenefitPlanNetPeriodicOtherBenefitCost

iosp:EnvironmentalMonitoringExpense

iosp:ForeignExchangeMovements

iosp:IncreaseDecreaseInUnrecognizedTaxBenefits

iosp:NoncashMovementsOnDefinedBenefitPensionPlans
us-gaap:StatementGeographical, us-gaap:IncomeTaxAuthority
iosp:OtherNonSignificantItemsInclusiveOfInterestAndPenalties

iosp:ProceedsFromRepaymentsOfLongTermDebt

iosp:RestructuringChargesIncludingAssetRetirementObligations
us-gaap:AwardType
iosp:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisedInPeriodWeightedAverageExercisePrice
us-gaap:AwardType
iosp:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriodWeightedAverageExercisePrice
us-gaap:AwardType
iosp:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodAtDiscountWeightedAverageGrantDateFairValue
us-gaap:AwardType
iosp:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodMarketValueWeightedAverageGrantDateFairValue
us-gaap:AwardType
iosp:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedOptionsExercisedWeightedAverageGrantDateFairValue
us-gaap:AwardType
iosp:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedOptionsExercisedWeightedAverageGrantDateFairValue
us-gaap:AwardType
iosp:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOtherThanOptionsGrantsInPeriodMarketValueGrossWeightedAverageExercisePrice

iosp:UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromPriorPeriodTaxPositions
us-gaap:ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItem
us-gaap:RestructuringCostAndReserve
us-gaap:AssetRetirementObligationAccretionExpense
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:BusinessExitCosts1

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:DeferredIncomeTaxesAndTaxCredits
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets
us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPlanInterestCost
us-gaap:IncomeStatementLocation, us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanServiceCost
us-gaap:IncomeStatementLocation, us-gaap:RetirementPlanSponsorLocation

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:EnvironmentalRemediationExpense

us-gaap:FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:GainLossOnDerivativeInstrumentsNetPretax

us-gaap:GoodwillForeignCurrencyTranslationGainLoss

us-gaap:ImpairmentOfIntangibleAssetsFinitelived
us-gaap:ConsolidationItems

us-gaap:IncomeTaxExaminationInterestExpense

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable

us-gaap:IncreaseDecreaseInPrepaidExpense

us-gaap:IncreaseDecreaseInReceivables

us-gaap:IncreaseDecreaseInRestructuringReserve

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:LossContingencyAccrualProvision
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax

us-gaap:PaymentsForCapitalImprovements

us-gaap:PaymentsForRestructuring

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsToDevelopSoftware

us-gaap:PensionContributions

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromMinorityShareholders

us-gaap:ProceedsFromSaleOfTreasuryStock
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome
us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome
us-gaap:StatementEquityComponents
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome
us-gaap:ReclassificationFromAociCurrentPeriodTax
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionAmountsOfTransaction

us-gaap:RepaymentsOfDebtAndCapitalLeaseObligations

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RestructuringCharges
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:RestructuringReserveAccrualAdjustment1

us-gaap:RestructuringReserveTranslationAdjustment
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
us-gaap:StatementScenario, us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationNumberOfEmployeesAffected
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice
us-gaap:StatementScenario, us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ShareBasedGoodsAndNonemployeeServicesTransactionModificationOfTermsIncrementalCompensationCost
us-gaap:AwardType
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue

us-gaap:StockIssuedDuringPeriodValueTreasuryStockReissued
us-gaap:StatementEquityComponents

us-gaap:TaxCutsAndJobsActOf2017ChangeInTaxRateIncomeTaxExpenseBenefit

us-gaap:TreasuryStockValueAcquiredCostMethod
us-gaap:StatementEquityComponents

iosp:DeferredFinanceCostsAssetNet

iosp:DeferredFinancingCostCapitalized

iosp:DeferredFinancingCostWriteOff

iosp:DeferredTaxAssetsAccretionExpense

iosp:DeferredTaxAssetsOperatingLeaseLiabilities

iosp:DeferredTaxAssetsOperatingLossesCarryForwardsNetOfValuationAllowance

iosp:DeferredTaxAssetsOtherIntangibleAssets

iosp:DeferredTaxAssetsRestructuringProvision

iosp:DeferredTaxLiabilitiesCustomerRelationships

iosp:DeferredTaxLiabilitiesInvestmentImpairmentRecapture

iosp:DeferredTaxLiabilitiesRightOfUseAssets

iosp:DeferredTaxLiabilitiesTaxDeferredExpenseCompensationAndBenefitsPensions
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:RetirementPlanName
iosp:DefinedBenefitsPlanCash
us-gaap:RetirementPlanName

iosp:DefiniteBenefitPlanExpectedChangeProjectBenefitObligationDueToDiscountRateChange

iosp:DefiniteBenefitPlanExpectedNetPensionCostDueChangeInDiscountRate

iosp:DefiniteBenefitPlanExpectedNetPensionCostDueChangeInInflationRate
us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency
iosp:FinanceLeasesFairValueDisclosure
us-gaap:StatementBusinessSegments
iosp:GoodwillHistoricalAccumulatedAmortization

iosp:NotionalValueOfForeignCurrencyForwardExchangeContracts

iosp:OperatingLossCarryforwardWithoutExpiration

iosp:OperatingLossCarryforwardsExpectedToRelieved

iosp:PrepaidExpenseCurrentExcludingTax
us-gaap:AwardType
iosp:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageExercisePrice
us-gaap:AwardType
iosp:ShareBasedCompensationSharesAuthorizedUnderStockEquivalentUnitsExercisePriceRangeNumberOfExercisableOptions
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency
iosp:StockEquivalentUnitsFairValueDisclosure

us-gaap:AccruedIncomeTaxesNoncurrent
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:AccruedProfessionalFeesCurrentAndNoncurrent

us-gaap:AccumulatedAmortizationDeferredFinanceCosts

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:CapitalLeaseObligationsCurrent

us-gaap:CapitalLeaseObligationsNoncurrent
us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency
us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
us-gaap:OtherCommitments
us-gaap:ContractualObligation

us-gaap:DeferredFinanceCostsGross

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsForeign

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseOther

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesUndistributedForeignEarnings
us-gaap:IncomeStatementLocation, us-gaap:RetirementPlanSponsorLocation
us-gaap:DefinedBenefitPensionPlanLiabilitiesNoncurrent
us-gaap:RetirementPlanSponsorLocation, us-gaap:StatementBusinessSegments

us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:RetirementPlanName
us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanBenefitObligation
us-gaap:RetirementPlanName, us-gaap:RetirementPlanType
us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanFairValueOfPlanAssets
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanName
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:RetirementPlanName
us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations
us-gaap:RetirementPlanSponsorLocation
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeFairValueOfDerivativeAsset
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeFairValueOfDerivativeLiability
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:DueToRelatedPartiesCurrentAndNoncurrent
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:RetirementPlanName
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

us-gaap:FinanceLeaseLiability
us-gaap:BalanceSheetLocation
us-gaap:BalanceSheetLocation
us-gaap:FinanceLeaseLiabilityCurrent
us-gaap:BalanceSheetLocation
us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:GoodwillGross
us-gaap:StatementBusinessSegments

us-gaap:GoodwillImpairedAccumulatedImpairmentLoss
us-gaap:StatementBusinessSegments

us-gaap:GuaranteeObligationsCurrentCarryingValue

us-gaap:InventoryRawMaterials

us-gaap:InventoryValuationReserves

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LiabilityForUncertainTaxPositionsCurrent
us-gaap:ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItem

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

us-gaap:LongtermDebtWeightedAverageInterestRate

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLossCarryforwards
us-gaap:IncomeTaxAuthority
us-gaap:StatementGeographical

us-gaap:PrepaidTaxes

us-gaap:RestructuringReserve

us-gaap:RestructuringReserveCurrent

us-gaap:RestructuringReserveNoncurrent
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
us-gaap:AwardType
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:TreasuryStockShares

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Expenses
Other Nonoperating Income Expense
Balance Sheet
Long Term Debt
Assets
Operating Lease Right Of Use Asset
Current Assets
Other Assets Current
NonCurrent Assets
Other Assets Noncurrent
PropertyPlantAndEquipmentNet
Property Plant And Equipment Net
Liabilities
Operating Lease Liability
Current Liabilities
Long Term Debt Current
Noncurrent Liabilities
Long Term Debt Noncurrent
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
Per Share
Common Stock Dividends Per Share Cash Paid
CashFlow
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInOperatingActivities
Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Treasury Stock Shares
DividendsAndRepurchase
Payments For Repurchase Of Common Stock
OperatingLeaseLiability
Operating Lease Liability Current
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Undiscounted Excess Amount
InventoryNet
Inventory Finished Goods
AccountsReceivable
Allowance For Doubtful Accounts Receivable Current

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁24.86924.84NA24.7224.56424.742NA24.71524.67824.594NA24.59724.59124.574NA24.56524.55524.527NA24.47624.44324.483NA24.61124.67124.808NA24.91524.67224.635NA24.09624.05724.015NA23.92323.8940.023823NA23.71124.5190.024461NA25.00225.005
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁24.62824.601NA24.5724.56424.529NA24.49124.48324.437NA24.41924.40924.369NA24.13724.13324.087NA23.97723.97324.019NA24.12124.20224.301NA24.4224.40124.362NA23.62123.52823.404NA23.2423.1470.023055NA23.71123.7260.023655NA23.80523.781
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount █▁0.0198360.015144NA0.017980.00.017636NA0.0125390.0125390.012539NA0.00.00.018468NA0.0188430.0188430.009422NA0.00.0004710.0NA0.0219590.0219590.033734NA0.0367750.0160970.008049NA0.00.00.010527NA0.001380.0323920.00138NA0.00138NANANANANA
us-gaap:EarningsPerShareBasic ▇▇▇▆▁██▇▇▇▇▇▇▇▄▇▇▆▇▆▇▆███▆▇▇▆▆▇▆▆▆▆▆▆▇▇▃▇▇▇█▆0.910.950.91999999999999990.52-1.621.351.271.230.911.170.83000000000000010.840.890.91-0.199999999999999730.971.080.710.91999999999999990.481.210.791.31999999999999981.481.430.741.15000000000000040.850.760.691.20000000000000020.590.730.770.55000000000000030.670.671.070.8299999999999998-0.711.040.911.021.260.5
us-gaap:EarningsPerShareDiluted ▇▇▇▆▁██▇▇▇▇▇▇▇▄▇▇▆▇▆▇▆███▆▇▇▆▆▇▆▆▆▆▆▆▇▇▃▇▇▇▇▆0.90.940.90999999999999990.51-1.621.341.26000000000000021.220.91.170.82000000000000030.840.890.9-0.189999999999999950.951.060.70.91000000000000010.471.180.771.29000000000000051.451.40.721.120.830.750.691.18000000000000020.580.710.750.52999999999999980.650.651.030.8-0.711.00.880.99000000000000021.20.48
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
 Gross Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,iosp:FuelSpecialties▃▃▃▂▁▄▄▃▃▄▄▃▃▃▃▂▂▂▃▁▂▄▆▆▆▇█▄▃▅▅▃▂▃▄▂▁143.1139.3138.30000000000007120.0107.4147.0150.3144.1133.3156.0162.0134.9134.2143.4146.0130.1121.3126.4142.5114.4129.3149.8186.3190.3182.3199.4216.8156.1145.1164.2163.8137.4126.2140.0155.0127.0114.5NANANANANANANANA
 Gross Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,iosp:OctaneAdditivesNANANANANANA12.66.51.9NA14.19.210.00.418.110.124.06.94.14.616.917.820.520.36.512.222.915.116.80.425.67.514.311.617.39.619.1NANANANANANANANA
 Gross Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,iosp:OilfieldServices▅▄▃▂▁▇███▇▇▇▆▆▅▅▄▃▃▂▂▁▂▄▄83.274.457.943.141.8112.2121.8121.4122.5114.2108.5104.295.092.979.981.976.166.559.349.746.536.248.778.970.7NANANANANANANANANANANANANANANANANANANANA
 Gross Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,iosp:PerformanceChemicals██▇▆▆▇▆▆▆▇▇▇▇█▇▇▆▆▁▁▁▂▂▂▃▃▂▃▃▃▂▂▂▂▂▂▂128.2125.9114.6102.095.7113.1106.099.9104.7118.1110.4114.8118.9124.0109.8110.3104.994.531.936.835.344.539.243.654.157.651.057.059.456.152.247.944.547.841.446.844.9NANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,iosp:FuelSpecialties▃▃▃▂▁▄▄▃▃▄▄▃▃▃▃▂▂▂▃▁▂▄▆▆▆▇█▄▃▅▅▃▂▃▄▂▁143.1139.3138.30000000000007120.0107.4147.0150.3144.1133.3156.0162.0134.9134.2143.4146.0130.1121.3126.4142.5114.4129.3149.8186.3190.3182.3199.4216.8156.1145.1164.2163.8137.4126.2140.0155.0127.0114.5NANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,iosp:OctaneAdditivesNANANANANANA12.66.51.9NA14.19.210.00.418.110.124.06.94.14.616.917.820.520.36.512.222.915.116.80.425.67.514.311.617.39.619.1NANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,iosp:OilfieldServices▅▄▃▂▁▇███▇▇▇▆▆▅▅▄▃▃▂▂▁▂▄▄83.274.457.943.141.8112.2121.8121.4122.5114.2108.5104.295.092.979.981.976.166.559.349.746.536.248.778.970.7NANANANANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,iosp:PerformanceChemicals██▇▆▆▇▆▆▆▇▇▇▇█▇▇▆▆▁▁▁▂▂▂▃▃▂▃▃▃▂▂▂▂▂▂▂128.2125.9114.6102.095.7113.1106.099.9104.7118.1110.4114.8118.9124.0109.8110.3104.994.531.936.835.344.539.243.654.157.651.057.059.456.152.247.944.547.841.446.844.9NANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
 TTM Greenblatt ROC _ _▇▆▆▅▁▇▇▇▆▇▇▆▆▆▇▆▇▆▆▆▆▆▇▇█▆▇▆▆▆▆▆▆▆▆▅▆▆▆▃▆▆37.028.229.416.8-53.440.943.838.231.736.242.933.428.328.938.430.234.726.432.318.928.625.634.341.257.423.444.025.225.318.026.619.522.322.225.817.324.131.223.5-20.222.423.9NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest ▆▅▆▆▁▆█▅▆▆▃▅▄▆█▇▇▆▄▅▆26.812.829.624.8-33.825.248.517.324.723.0-6.019.24.929.749.542.535.821.76.211.627.4NANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CostOfGoodsAndServicesSold ▆▅▄▁▁▆█▆▆▇█▆▆▆▆▅▄246.2238.8219.8186.4185.8258.4272.5252.8251.3270.5278.3252.1255.3256.2245.3233.6221.2NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:GrossProfit ▇▆▅▄▂▇██▇██▇▆▇▇▆▇▅▅▄▅▄▅▅▅▄▅▃▃▃▃▂▂▂▂▁▂▂▂▂▂▁▁▁▁108.3100.891.078.759.1113.9118.2119.1111.1117.8116.7111.0102.8104.5108.598.8105.190.991.479.285.576.286.390.487.581.894.173.668.665.774.657.459.463.865.050.756.764.057.857.758.152.854.154.654.0
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▇▇▆▆▁▇▇▇▇▇▇▇▇▇▇▇▇▆▆▅▇▆▇▇█▆▇▆▆▆▇▆▆▆▆▆▆▇▆▃▇▆▆▇▅40.130.829.120.2-53.844.243.337.830.538.842.030.429.529.740.229.934.823.229.013.236.424.535.241.451.823.942.725.423.819.030.718.320.922.926.717.019.532.020.0-25.229.528.316.531.312.9
us-gaap:IncomeTaxExpenseBenefit █▆▆▆▄▇▇▆▆▇█▇▆▆▇▆▇▆▆▆▆▆▆▆█▆▇▆▆▆▆▆▆▆▁▆▆▆▆▅▆▆▅▆▆17.77.46.57.5-14.111.112.27.78.210.121.69.87.77.512.36.68.76.06.91.87.55.63.75.817.36.014.84.65.32.12.04.33.84.9-39.81.54.07.40.4-8.44.96.8-7.81.30.9
us-gaap:InterestIncomeExpenseNonoperatingNet ████▇▇▇▄▅▄▃▂▂▃▂▁▂▁▅▇▇▆▅▅▆▅▆▆▆▆-0.3-0.4-0.3-0.4-0.5-0.6-0.7-1.4-1.2-1.5-1.6-1.8-1.8-1.7-1.9-2.1-2.0-2.2-1.0-0.7-0.7-0.8-1.1-1.0-0.9-1.0-0.9-0.8-0.8-0.9NANANANANANANANANANANANANANANA
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest 0.1NA0.00.00.00.10.00.00.1NANANANANA0.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingExpenses ▅▅▄▄█▅▅▅▅▅▅▅▅▅▄▄▄▄▄▄▃▃▃▃▁▃▃▃▂▃▃▂▂▂▂▁▁▁▁▅▂▁▂▁▁71.372.661.661.9112.573.074.480.979.481.673.877.674.575.670.168.670.464.559.160.356.950.652.049.230.158.450.148.443.347.748.037.937.141.639.233.432.632.834.377.935.728.938.933.729.2
us-gaap:OperatingIncomeLoss ▇▆▆▅▁▇▇▇▆▇▇▆▆▆▇▆▇▆▆▆▆▆▇▇█▆▇▆▆▆▆▆▆▆▆▅▆▆▆▃▆▆▅▆▆37.028.229.416.8-53.440.943.838.231.736.242.933.428.328.938.430.234.726.432.318.928.625.634.341.257.423.444.025.225.318.026.619.522.322.225.817.324.131.223.5-20.222.423.915.220.924.8
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax ▅▃▇▇▆▃▆▂▅▄▃▄▂▆▇█▆▅▁▅▄▅▃▆▅▃▃▄▅▄▅▅▅▄▅▅▅▅▅▅▄3.8-11.314.211.95.5-7.98.0-12.43.4-5.0-10.2-1.5-17.36.413.318.19.13.5-20.2-0.1-1.81.6-11.45.13.3-8.0-11.8-6.01.0-1.22.82.2-0.2-3.64.31.71.00.2-0.80.4-4.0NANANANA
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▄▂▄▄▄▃▅▂▃▃▁▃▂▄█▅▄▄▂▃▃▃▃▄▄▃▇▃▃▃▃▄▃▃4.4-10.67.012.15.9-7.917.4-12.82.4-5.7-26.4-1.4-16.97.554.319.29.74.5-15.90.2-1.51.9-7.46.04.0-7.243.7-5.11.8-0.4-3.43.40.8-2.6NA1.71.00.1NA-2.9-4.5NANANANA
us-gaap:OtherNonoperatingIncomeExpense ▅▅▄▆▄▆▄▅▄▆▅▄▅▅▆▅▅▄▄▃▇▄▅▅▃▅▄▅▄▅▆▄▄▅▅▄▃▅▄▃▇▆▅█▁3.43.00.03.80.13.90.21.00.04.10.7-1.23.02.53.71.82.1-1.0-2.3-5.08.5-0.32.01.2-4.71.5-0.41.0-0.71.94.9-0.8-1.01.01.3-0.1-4.31.1-2.6-4.37.95.32.411.6-10.8
us-gaap:ProfitLoss ▇▇▇▆▁██▇▇▇▇▇▇▇▄▇▇▆▇▆▇▆███▆22.423.422.612.7-39.733.131.130.122.328.720.420.621.822.2-4.823.326.117.222.111.428.918.931.535.634.517.9NANANANANANANANANANANANANANANANANANANA
us-gaap:ResearchAndDevelopmentExpense ▇▇▄▅▆▇▆█▆▇▆▆▇▆▅▆▆▅▃▄▃▄▃▄▄▃▂▃▃▃▁▃▂▃▂▂▂▁▁▂▂▁▁▁▁8.69.06.57.78.18.68.49.78.29.18.38.18.78.37.67.98.57.45.86.56.26.96.06.66.56.24.96.05.65.74.65.75.35.65.24.85.04.64.64.74.74.34.64.54.5
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▇▆▅▄▃▇█▇▇██▇▇▇▇▆▆▅▃▂▃▂▃▄▃▄▅▃▃▃▃▂▂▂▂▁▁▂▂▂▂▂▁▁▁354.5339.6310.8265.1244.9372.3390.7371.9362.4388.3395.0363.1358.1360.7353.8332.4326.3294.3237.8205.5228.0212.1246.0254.2242.9269.2290.7228.2221.3220.7241.6192.8185.0199.4213.7183.4178.5200.8200.5202.1186.5185.3177.3174.0168.4
us-gaap:SellingGeneralAndAdministrativeExpense ▇▇▅▅▇▇▇███▇▇▇▇▇▆▆▆▆▆▅▄▅▅▅▅▄▄▃▄▄▂▂▃▂▂▁▂▂█▂▁▂▂▁62.763.654.954.263.564.466.071.271.272.563.264.765.867.362.660.760.955.356.456.153.143.955.152.750.248.747.142.437.741.842.931.831.535.733.728.327.327.828.872.630.524.033.528.624.1
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:Assets █▇▇▇▇▇██████▇█▇▆▆▆▅▄▄▄▄▄▄▄▄▃▃▃▃▂▁▁▁▁▁▁▁▁▁1461.81426.11397.41343.71339.01455.31468.81494.41489.61526.61473.41497.11451.21472.91410.21312.61276.91225.41181.41043.31031.11001.01030.01016.8998.4976.8999.9774.6786.8777.6794.7697.9593.9584.3579.4634.4603.0592.0568.8597.5572.1NA548.3NANA
us-gaap:LiabilitiesAndStockholdersEquity █▇▇▇▇▇██████▇█▇▆▆▆▅▄▄▄▄▄▄▄▄▃▃▃▃▂▁▁▁▁▁▁▁▁▁1461.81426.11397.41343.71339.01455.31468.81494.41489.61526.61473.41497.11451.21472.91410.21312.61276.91225.41181.41043.31031.11001.01030.01016.8998.4976.8999.9774.6786.8777.6794.7697.9593.9584.3579.4634.4603.0592.0568.8597.5572.1NA548.3NANA
us-gaap:StockholdersEquity ███▇▇█▇▇▇▇▆▇▆▆▆▆▅▅▅▅▄▄▄▄▄▃▃▃▂▂▂▂▁▁▁▂▂▂▁▁▁973.6958.6944.4925.5899.2943.8918.5881.8862.7848.4825.0839.9819.3824.4793.9747.5704.0676.2653.5651.9639.2618.8605.0587.8549.3522.1515.9457.5441.3426.8409.4376.0351.5333.8317.0403.0385.7368.6343.1311.5340.8NA300.7NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:AssetsCurrent ▇▇▆▅▅▇▇█▇███▇▇▆▅▅▄▄▄▄▃▄▄▃▃▃▃▃▃▃▂▁▁▁▂▂▂▁▂▂643.1607.6566.2528.8532.9626.7630.3673.3650.5683.6663.9659.3609.3622.7561.5532.7519.9476.1441.1479.2463.8433.0458.7443.4426.4391.4414.2397.6405.9394.6407.4363.2314.1303.4296.6375.1349.4339.5320.3375.3349.1NA321.9NANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▄▆▅▃▃▃▄▅▅▆▆▄▃▄▄▃▂▂▅█▇▅▇▆▃▂▂▄▄▄▄▃▃▂▁▆▅▄▄▆▅▄▅▅▃94.4117.0105.366.658.268.175.7110.3106.1123.5123.191.466.078.190.265.548.845.4101.9167.1153.2113.4136.9127.764.346.541.690.491.490.180.253.954.743.222.4129.6105.891.276.2132.199.089.9107.198.873.7
us-gaap:ReceivablesNetCurrent ▇▆▅▅▅███▇█▇█▇▇▆▆▆▅▃▂▃▃▃▂▂▃▄▂▂▂▃▂▁▁▂▁▁▁▁▁▁281.6247.9221.4206.2213.4296.3292.0296.5280.0296.7279.7287.8277.2280.3244.5245.6241.6219.3154.4125.5136.9146.4137.4130.2131.5147.7164.3117.3118.0122.0135.8113.086.797.5115.793.495.5100.099.492.296.8NA84.2NANA
us-gaap:InventoryNet ▇▆▆▇▇▇▇▇▇▇▇█▇▇▅▅▆▅▃▂▂▂▂▃▃▃▄▃▃▂▂▃▂▁▁▁▁▁▁▁▁250.5223.1220.0239.8243.6246.0244.6251.4248.2249.1248.0261.9252.3247.7209.8211.5217.6199.0173.8161.8155.1152.6159.9166.8167.5176.0184.9171.9172.8160.2158.9167.3149.5141.8138.3143.8139.8139.1135.9137.7142.4NA122.3NANA
us-gaap:InventoryFinishedGoods ▇▆▆▇▇▇▇▇▇▇▇███▅▅▆▅▄▃▃▃▃▃▃▃▄▄▃▃▂▃▂▁▁▁▁▁▁▁▂174.0158.5156.3171.3175.4171.8173.9175.1178.4178.6180.2189.5190.2182.1145.9144.7149.6140.3118.1109.5103.7104.2104.4109.6107.2114.4127.0118.9107.8101.795.3106.192.881.775.278.180.679.781.383.387.2NA78.2NANA
us-gaap:OtherAssetsCurrent ▆█▂▂▁▁▃▂1.52.30.40.20.00.00.80.2NA1.00.00.00.00.61.12.0NANA0.00.00.00.01.8NANANA0.0NANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NoncurrentAssets NANA325.7NANANA343.3NANANA332.7NANANA359.2NANANA409.2NANANA246.1NANANA263.0NANANA189.1NANANA71.7NANANA65.3NANANA68.4NANA
 us-gaap:NoncurrentAssets us-gaap:StatementGeographical country:GBNANA61.3NANANA70.4NANANA71.6NANANA45.7NANANA45.9NANANA49.3NANANA54.1NANANA29.4NANANA28.7NANANA32.4NANANA40.1NANA
 us-gaap:NoncurrentAssets us-gaap:StatementGeographical iosp:RestOfEuropeNANA123.2NANANA116.6NANANA112.2NANANA163.5NANANA207.5NANANA10.6NANANA10.4NANANA11.5NANANA11.5NANANA10.9NANANA11.6NANA
 us-gaap:NoncurrentAssets us-gaap:StatementGeographical iosp:RestOfWorldNANA0.2NANANA0.3NANANA0.3NANANA0.3NANANA0.5NANANA0.4NANANA0.6NANANA0.0NANANA0.0NANANANANANANANANANA
 us-gaap:NoncurrentAssets us-gaap:StatementGeographical iosp:UnitedStatesNorthAmericaNANA141.0NANANA156.0NANANA148.6NANANA149.7NANANA155.3NANANA185.8NANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PropertyPlantAndEquipmentGross NANA464.5NANANA429.5NANANA403.3NANA321.4327.2312.9300.7278.1251.8174.5168.6165.7161.0158.4153.9185.7187.0159.8161.8157.5175.1155.1147.1144.3146.2140.4136.5137.0133.7133.7135.1NA128.3NANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:BalanceSheetLocation iosp:FinancialLeasesNANA9.0NANANA9.9NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:BuildingNANA65.5NANANA60.0NANANA57.0NANANA44.0NANANA37.8NANANA21.6NANANA20.7NANANA10.8NANANA6.5NANANA5.1NANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:ConstructionInProgressNANA27.5NANANA19.0NANANA16.0NANANA16.1NANANA14.2NANANA5.2NANANA5.7NANANA3.9NANANA3.5NANANA8.2NANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:EquipmentNANA349.9NANANA330.7NANANA311.7NANANA249.4NANANA192.6NANANA128.0NANANA151.8NANANA152.9NANANA129.0NANANA113.3NANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LandNANA21.6NANANA19.8NANANA18.6NANANA17.7NANANA7.2NANANA6.2NANANA8.8NANANA7.5NANANA7.2NANANA7.1NANANANANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment NANA253.7NANANA230.8NANANA206.9NANA124.6131.2123.7113.8101.094.494.390.689.185.084.381.4105.7106.299.1100.597.4114.7104.497.595.396.493.790.890.587.886.386.2NA79.6NANA
 us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment us-gaap:BalanceSheetLocation iosp:FinancialLeasesNANA8.0NANANA8.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AmortizationOfIntangibleAssets ▄▄▅▅▆▆▆▆▆▆▆▇▇▇█▇▇▇▆▆▆▆▆▅▅▅▅▄▅▅▅▂▂▂▁▁▁▁▁▁▁4.04.04.64.85.75.85.85.75.85.75.96.86.96.77.76.96.86.96.06.16.16.05.45.25.35.15.13.94.44.44.52.42.12.11.01.11.01.01.01.11.1NANANANA
us-gaap:PropertyPlantAndEquipmentNet ████▇▇▇▇▇▇▇▇▇▇▇▇▇▆▆▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁214.1209.9210.8204.2198.9197.8198.7195.0200.3199.7196.4194.7191.4196.8196.0189.2186.9177.1157.480.278.076.676.074.172.580.080.860.761.360.160.450.749.649.049.846.745.746.545.947.448.9NA48.7NANA
us-gaap:Goodwill ███████████████▇▇▇█▅▅▅▅▅▅▅▅▂▂▂▂▂▁▁▁▁▁▁▁▁▁368.2367.2371.2367.2363.3361.2363.0360.5364.3363.1364.9366.3367.1364.1361.8346.8335.5335.4374.8267.4267.4267.5267.4268.3268.4275.9276.1187.9188.1187.9187.9165.3148.7148.6149.0140.5140.8141.2141.5141.9142.6NA143.6NANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▃▃▄▄▄▅▅▅▆▆▆▆▇▇▇█▇█▆▇▇▇▇████▅▅▆▆▅▃▃▃▁▁▁▁▁▁66.470.275.378.682.3107.1113.5118.4125.1130.4136.3142.3149.4158.3163.3169.6164.1171.2144.4150.5156.6162.6168.7172.6175.9178.6181.1120.2121.1124.0126.8104.868.168.568.621.019.119.217.715.616.8NA19.0NANA
us-gaap:OperatingLeaseRightOfUseAsset ▇▇█▆▆▇▇▇▇█▁36.436.740.129.729.531.732.433.836.037.40.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▅▇█▆▅▅▆▅▆▆▇▇█▇▅▄▃▂▂▂▃▂▂▂▂▁▂▂▂▂▂▂▂▂▂▂▁▁▁▁▃5.07.58.25.84.64.75.94.45.46.27.26.98.26.85.13.12.41.10.80.82.30.70.90.91.30.40.70.81.51.41.81.00.71.41.40.90.10.20.60.52.5NA1.9NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:AccountsPayableCurrent █▇▆▄▄▆▇▆▇█████▇▇▆▅▂▂▂▂▂▃▃▂▅▂▂▂▃▂▁▁▂▂▁▂▂▂▂123.5114.598.781.874.1108.4122.0106.1117.1123.9126.8127.4125.6128.2117.9115.7108.097.559.656.450.749.952.267.267.459.487.651.852.053.963.356.947.046.757.354.843.157.153.353.357.5NA45.9NANA
us-gaap:AccruedIncomeTaxesCurrent ▂▃▂▂▃▅▄▇▆▅▃█▆▅▇▃▄▆▄▅▅▄▃▁▁▁▂6.38.85.55.48.412.310.315.014.212.68.617.913.811.315.88.29.013.99.411.812.39.97.94.53.94.85.6NANANA0.00.00.00.93.23.14.02.92.00.02.7NA6.1NANA
us-gaap:AccruedLiabilitiesCurrent ▇▆▆▆▅▆██▆▅▆▅▄▆▄▃▃▃▃▂▂▁▃▂▂▂▂▁▁▁▂▂▂▂▂▂▂▁▂▂▂142.3131.8129.8125.7118.8127.9154.0159.5132.0123.8132.1122.9105.7130.6104.194.091.490.494.379.772.765.484.169.169.671.977.265.362.961.873.582.670.769.672.182.372.868.777.082.479.1NA85.7NANA
us-gaap:LiabilitiesCurrent █▇▆▅▅▇█████▇▇█▆▅▅▅▃▂▂▂▄▄▄▄▅▁▁▁▂▂▁▁▂▂▁▂▂▅▃291.0274.3252.4229.8219.2266.1303.5296.7303.7300.0296.6290.5267.3292.6261.6237.9228.4221.7183.1159.0149.2147.4206.1196.7193.6189.3222.9121.4125.5127.0155.6153.8128.9128.9147.3152.1131.7142.4146.0221.4178.6NA158.9NANA
us-gaap:LongTermDebtCurrent NANA0.0NA0.00.00.00.021.521.521.415.815.815.815.810.310.310.310.3NANANA0.00.00.00.20.40.05.35.45.35.05.05.05.05.05.05.05.080.033.0NA15.0NANA
us-gaap:OperatingLeaseLiabilityCurrent ██▇▇▇▇▇▇██▁12.112.211.311.311.011.110.611.011.611.40.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:LongTermDebt NANA0.00.038.858.758.6131.2158.0207.8207.6223.9223.8213.6218.4229.3249.1239.0268.8NANANA133.0127.0139.0139.2139.4115.0139.5139.7148.093.033.037.030.034.040.0NA35.0NANANANANANA
 us-gaap:LongTermDebt us-gaap:CreditFacility us-gaap:RevolvingCreditFacilityNANA0.00.040.060.060.0132.576.0126.0126.0126.0126.0116.0121.0121.0141.0131.0161.0143.0154.0146.0133.0NANANA139.0NANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:LongtermDebtType iosp:TermLoanNANA0.0NANANA0.00.082.582.582.599.099.099.099.0110.0110.0110.0110.0NANANA0.0NANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LongTermDebtNoncurrent NA0.00.00.038.858.758.6131.2136.5186.3186.2208.1208.0197.8202.6219.0238.8228.7258.5143.0154.0146.0133.0127.0139.0139.0139.0115.0134.2134.3142.788.028.032.025.029.035.031.030.010.00.0NA32.0NANA
us-gaap:DeferredIncomeTaxLiabilitiesNet █▃▃▃▁54.446.546.947.244.0NA49.6NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent ▇▇█▆▄▄▄▁▂▁▁▃▂▃▃19.519.520.518.717.917.417.815.416.015.615.716.616.417.016.5NANANA14.2NANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:MinorityInterest █▆▆▆▆▆▃▃▃▆▆▃▃▃▃▃▃▁▁▁▁▁▁▃▃0.60.50.50.50.50.50.40.40.40.50.50.40.40.40.40.40.40.30.30.30.30.30.30.40.4NA0.0NANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent ▄▄▅▄▃▃▃▃▃▄▄██▃▃▁▂▂▂▂▁▂▂▁▂▃▄▃▁▁▁▁▁▄▁▁▁▁▂▁▁2.42.43.42.71.41.51.71.91.92.02.15.35.01.91.40.40.50.91.00.90.30.90.50.10.71.62.01.50.20.10.30.20.22.20.20.10.30.10.80.20.4NA0.5NANA
us-gaap:OperatingLeaseLiabilityNoncurrent ▇▇█▅▆▆▆▇▇▇▁24.424.628.918.518.620.721.922.824.426.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA9.4NANANA9.19.08.9NA4.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA8.2NANANA5.86.47.2NA3.2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA5.5NANANA4.44.54.6NA2.3NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA3.8NANANA2.12.43.0NA2.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA4.6NANANA2.52.73.2NA4.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:StockholdersEquity ███▇▇█▇▇▇▇▆▇▆▆▆▆▅▅▅▅▄▄▄▄▄▃▃▃▂▂▂▂▁▁▁▂▂▂▁▁▁973.6958.6944.4925.5899.2943.8918.5881.8862.7848.4825.0839.9819.3824.4793.9747.5704.0676.2653.5651.9639.2618.8605.0587.8549.3522.1515.9457.5441.3426.8409.4376.0351.5333.8317.0403.0385.7368.6343.1311.5340.8NA300.7NANA
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest ███▇▇█▇▆▆▆▆▆▅▆▅▄▄▃▃▃▂▂▂▂▁974.2959.1944.9926.0899.7944.3918.9882.2863.1848.9825.5840.3819.7824.8794.3747.9704.4676.5653.8652.2639.5619.1605.3588.2549.7NA515.9NANANA409.4NANANANANANANANANANANANANANA
us-gaap:AdditionalPaidInCapitalCommonStock ███▇▇▇▇▇▆▆▆▆▆▆▆▅▅▅▅▅▄▄▄▄▄▄▄▄▄▄▄▂▂▂▂▂▂▂▂▁▁339.5337.8336.1334.4333.0331.2330.4329.4327.7326.0324.9322.9321.6321.1320.4317.9316.9315.7315.1313.4312.4311.4311.0310.6309.9308.9308.8310.5310.1309.3308.8297.0292.4292.1292.1290.6291.3292.2291.5289.4285.9NA286.3NANA
us-gaap:RetainedEarningsAccumulatedDeficit ███▇▇██▇▇▇▆▆▆▆▆▆▆▅▅▅▅▅▄▄▄▃▃▃▂▂▂▂▂▂▂▂▂▂▁▁▁790.4782.0758.6748.8736.1788.6755.5737.2707.1697.0668.3658.9638.3627.2605.0619.2595.9579.0561.8547.5536.1515.3496.4472.5436.9409.7391.8377.1356.3344.4327.5330.1316.1299.0281.0315.0299.5284.0259.4239.8256.6NA210.5NANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▆▆▇▆▆▅▆▅▆▆▆▇▇██▅▄▄▃▄▄▄▄▄▄▄▄▂▂▂▂▁▁▁▁▄▄▄▄▃▃-63.5-67.9-57.3-64.3-76.4-82.3-74.4-91.8-79.0-81.4-75.7-49.3-47.9-31.0-38.5-92.8-112.0-121.7-126.2-110.3-110.5-109.0-110.9-103.5-109.5-113.5-106.3-157.6-152.5-154.3-153.9-169.8-173.2-174.0-171.4-117.2-118.9-119.9-120.0-138.4-135.5NA-131.6NANA
us-gaap:TreasuryStockValue ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇███████▆▆▆▅▄▂▂▂▂▄▅▅▅▅▅▆▆▄▁93.193.693.393.793.894.093.393.393.493.592.892.993.093.293.397.197.197.197.599.099.199.291.892.188.383.378.772.872.972.973.381.684.183.685.085.786.588.088.179.666.5NA64.8NANA
us-gaap:MinorityInterest █▆▆▆▆▆▃▃▃▆▆▃▃▃▃▃▃▁▁▁▁▁▁▃▃0.60.50.50.50.50.50.40.40.40.50.50.40.40.40.40.40.40.30.30.30.30.30.30.40.4NA0.0NANANANANANANANANANANANANANANANANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue ▆▇▆▇▇▆▇▇▇▇▇▅▅▅▅▆▆▅▄▅▅▅▅▅▅▅▅▄▄▄▄▄▁█▂▅▅▅█▄1.31.61.41.61.61.21.71.71.61.61.91.11.10.80.81.21.21.00.50.91.00.91.00.90.90.90.90.50.60.60.60.5-0.82.2-0.30.80.80.82.00.7NANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▁▃▇▇▄▁▇▅▆▂█▅▁▁▆▆-1.122.758.255.529.82.458.440.050.013.269.834.82.3-2.047.546.1NANANANANANANANANANANANA12.920.929.5-5.819.717.9-2.733.712.318.013.89.45.85.715.822.0NA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▄▃▅▆▆▅▆▆▇▂▄▄▁█▅▄-8.9-10.3-8.0-7.1-6.8-7.8-7.3-6.8-5.7-11.2-9.3-9.1-12.5-4.6-7.5-9.0NANANANANANANANANANANANA-4.8-3.0-48.8-59.7-3.1-4.5-59.3-4.2-2.6-4.2-4.2-2.4-2.6-1.5-4.0-2.1NA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▇█▇▅▅█▁▆▃█▆███▇▆-13.0-0.3-12.0-40.2-33.0-1.6-86.1-28.6-61.7-1.5-28.8-0.2-1.4-5.8-15.5-20.6NANANANANANANANANANANANA-6.9-8.045.664.6-5.07.6-45.2-5.65.11.0-65.426.66.1-22.3-3.41.0NA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▂▅█▅▃▄▁▅▃▄▇▇▃▃▇-22.611.738.78.4-9.9-7.6-34.64.2-17.40.431.725.4-12.1-12.124.7NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:DepreciationDepletionAndAmortization ▆▆▆▇▇▇▇█▇▇▇█████▇▇▆▆▆▅▆▅▅▅▅▄▄▄▄▂▂▂▁▁▁▁▁▂▂▂▂▂10.310.310.711.112.212.011.312.512.211.611.712.612.712.613.212.712.212.39.69.69.79.29.58.48.88.58.06.57.27.47.04.64.34.53.22.82.82.73.33.63.63.93.83.9NA
us-gaap:IncreaseDecreaseInInventories ▇▄▁▃▃▄▃▄▃▄▂▅▅█▄▃▆▆▃▄▄▃▃▄▄▃▃▄▅▄▂▅▅▄▃▄▄▄▃▃▅▄▄▄25.85.5-22.2-5.4-2.95.0-8.45.9-1.71.8-13.310.38.137.1-0.7-7.816.522.8-8.76.72.2-7.9-4.70.74.9-6.4-3.71.512.21.1-14.412.07.94.6-6.63.41.62.6-1.4-3.515.04.26.51.0NA
us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet ▁▇▇▅▅▂▇▄▄▆▆▃▅▅▃█▇▅▅-2.71.82.10.30.0-1.72.2-0.3-0.80.81.0-1.50.70.2-1.22.61.70.50.0NANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▁▃▇▇▄▁▇▅▆▂█▅▁▁▆▆-1.122.758.255.529.82.458.440.050.013.269.834.82.3-2.047.546.1NANANANANANANANANANANANA12.920.929.5-5.819.717.9-2.733.712.318.013.89.45.85.715.822.0NA
us-gaap:ProfitLoss ▇▇▇▆▁██▇▇▇▇▇▇▇▄▇▇▆▇▆▇▆███▆22.423.422.612.7-39.733.131.130.122.328.720.420.621.822.2-4.823.326.117.222.111.428.918.931.535.634.517.9NANANANANANANANANANANANANANANANANANANA
us-gaap:ShareBasedCompensation ▅▇▆▇▇▅▇▇▇▇█▄▄▃▃▅▅▄▂▄▄▄▄▄▄▄▄▂▂▂▂▂▃▃▃▃▃▃▃▃▃▄▁▂1.31.61.41.61.61.21.71.71.61.61.91.11.10.80.71.21.21.00.50.91.00.91.00.90.90.90.90.50.60.60.60.50.70.70.70.80.80.80.80.70.70.90.30.5NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInInvestingActivities ▄▃▅▆▆▅▆▆▇▂▄▄▁█▅▄-8.9-10.3-8.0-7.1-6.8-7.8-7.3-6.8-5.7-11.2-9.3-9.1-12.5-4.6-7.5-9.0NANANANANANANANANANANANA-4.8-3.0-48.8-59.7-3.1-4.5-59.3-4.2-2.6-4.2-4.2-2.4-2.6-1.5-4.0-2.1NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInFinancingActivities ▇█▇▅▅█▁▆▃█▆███▇▆-13.0-0.3-12.0-40.2-33.0-1.6-86.1-28.6-61.7-1.5-28.8-0.2-1.4-5.8-15.5-20.6NANANANANANANANANANANANA-6.9-8.045.664.6-5.07.6-45.2-5.65.11.0-65.426.66.1-22.3-3.41.0NA
us-gaap:PaymentsOfDividends NANA12.80.0NANA12.80.0NANA11.00.0NANA9.40.0NANA7.80.0NANA7.60.0NANA6.80.0NANA12.00.0NANANANANANANANANANANANANA
us-gaap:Dividends 14.0NA12.80.012.8NA12.80.012.2NA11.00.010.7NA9.40.0NANA7.80.0NANA7.60.0NANA6.80.0NANANANANANANANANANANANANANANANANA
us-gaap:PaymentsForRepurchaseOfCommonStock ▁▁▁▁▁▂▁▁▁▂▁▁▁▂▁▁▁▁▁▁▁▅▁▃▃▄▄▁▁▁▁▁▂▂▁▁▁▁▅█▁▃▂▁0.20.60.00.00.02.10.20.10.21.90.20.00.11.10.10.00.10.90.20.00.08.2-0.14.05.16.36.00.10.60.20.00.61.81.30.00.10.90.48.615.40.73.42.50.0NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value242424242424242424242424242424242424242424242424242423230.02382323240.0244612525
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value242424242424242424242424242423232424242424242423232323230.02305523230.0236552323
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-30
Value19836.015144.017980.0017636.012539.012539.012539.00018468.018843.018843.09422.00471.0021959.021959.033734.036775.016097.08049.00010527.01380.032392.01380.01380.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.00.0100.0100.0100.0100.00.00.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.910.950.920.52-1.621.351.271.230.911.170.830.840.890.91-0.20.971.080.710.920.481.210.791.321.481.430.741.150.850.760.691.20.590.730.770.550.670.671.070.83-0.711.040.911.021.260.5
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.90.940.910.51-1.621.341.261.220.91.170.820.840.890.9-0.190.951.060.70.910.471.180.771.291.451.40.721.120.830.750.691.180.580.710.750.530.650.651.030.8-0.711.00.880.991.20.48
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType

us-gaap:AllocatedShareBasedCompensationExpense

iosp:StockEquivalentUnits


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-1.54.4-3.01.9-3.06.06.12.24.37.5-2.22.64.11.23.01.11.60.91.03.7-1.01.02.51.00.41.01.7-0.70.40.60.82.40.23.7
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.41.3-1.00.7-1.21.61.60.61.21.9-0.60.71.10.30.80.30.50.30.41.8-0.40.51.00.40.20.40.6-0.30.20.30.31.20.11.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax iosp:StockEquivalentUnits0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value26122924-33.82548172423-6.0194.929494235216.21127
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.63.89.59.4-13.86.812.44.76.85.9-1.55.31.48.214.012.811.07.42.65.612.0

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value246238219186185258272252251270278252255256245233221
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax69.470.370.770.375.969.469.768.069.369.770.569.471.371.069.370.367.8

Gross Profit

us-gaap:GrossProfit

us-gaap:GrossProfit


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1081009178591131181191111171161111021041089810590917985768690878194736865745759636550566457575852545454
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax30.629.729.329.724.130.630.332.030.730.329.530.628.729.030.729.732.230.938.438.537.535.935.135.636.030.432.432.331.029.830.929.832.132.030.427.631.831.928.828.631.228.530.531.432.1

us-gaap:GrossProfit us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, iosp:FuelSpecialties


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value50444340255150544455534844485244454656434351656968616953435251424047483634
Percentage of GrossProfit46.344.547.751.243.045.042.345.440.247.345.644.043.346.448.245.143.050.762.355.351.167.276.176.378.775.274.372.364.079.168.474.268.273.774.672.661.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.113.214.015.210.413.812.814.512.314.313.513.412.413.414.813.413.915.723.921.319.224.126.727.128.422.824.023.319.823.621.122.121.923.622.720.119.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments iosp:FuelSpecialties35.032.20.033.623.634.80.037.533.535.70.036.233.233.80.034.337.336.50.038.333.834.20.036.337.830.80.034.130.331.70.031.032.133.60.029.030.3

us-gaap:OperatingSegments, iosp:OctaneAdditives


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value0.00.00.00.0-1.1-1.11.81.20.9-2.23.63.45.9-0.88.85.0132.71.22.510119.99.03.85.8126.79.40.1103.77.66.36.33.59.9
Percentage of GrossProfit0.00.00.00.0-1.9-1.01.51.00.8-1.93.13.15.7-0.88.15.112.83.01.33.212.415.511.510.04.37.113.29.113.70.213.76.412.89.99.76.917.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.0-0.4-0.30.50.30.2-0.60.90.91.6-0.22.51.54.10.90.51.24.65.64.03.51.62.24.32.94.20.04.21.94.13.22.91.95.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments iosp:OctaneAdditives0.00.00.00.00.00.00.018.547.40.00.037.059.0-200.00.049.556.239.10.054.362.766.30.044.358.547.50.044.456.025.00.049.353.154.30.036.551.8

us-gaap:OperatingSegments, iosp:OilfieldServices


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value262420149.93639414137363328312628292524201911163228
Percentage of GrossProfit24.624.322.318.316.831.833.434.637.432.031.630.227.830.024.328.827.627.926.626.023.315.219.435.432.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.57.26.55.44.09.710.111.111.59.79.39.28.08.77.58.68.98.610.210.08.75.56.812.611.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments iosp:OilfieldServices32.032.90.033.423.732.30.033.933.933.00.032.130.133.80.034.838.138.20.041.442.832.00.040.640.2

us-gaap:OperatingSegments, iosp:PerformanceChemicals


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value3131272424272622242623252325212017169.0121113101214141113151313111110101012
Percentage of GrossProfit29.231.230.030.542.124.222.819.021.622.619.722.823.224.319.421.016.618.49.815.513.217.312.413.716.917.712.518.622.320.718.019.319.016.515.720.521.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.99.28.89.110.27.46.96.16.66.95.87.06.67.05.96.25.35.73.86.05.06.24.34.96.15.44.16.06.96.25.55.86.15.34.85.76.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments iosp:PerformanceChemicals24.624.90.023.526.024.40.022.622.922.50.022.020.020.50.018.816.617.70.033.432.029.70.028.427.425.20.024.025.824.20.023.225.422.00.022.226.9

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value40302920-53.844433730384230292940293423291336243541512342252319301820222617193220-25.22928163112
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.39.19.47.6-22.011.911.110.28.410.010.68.48.28.211.49.010.77.912.26.416.011.614.316.321.38.914.711.110.88.612.79.511.311.512.59.310.915.910.0-12.515.815.39.318.07.7

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value177.46.57.5-14.111127.78.210219.87.77.5126.68.76.06.91.87.55.63.75.8176.0144.65.32.12.04.33.84.9-39.81.54.07.40.4-8.44.96.8-7.81.30.9
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.02.22.12.8-5.83.03.12.12.32.65.52.72.22.13.52.02.72.02.90.93.32.61.52.37.12.25.12.02.41.00.82.22.12.5-18.60.82.23.70.2-4.22.63.7-4.40.70.5

Interest Income Expense Nonoperating Net

us-gaap:InterestIncomeExpenseNonoperatingNet

us-gaap:InterestIncomeExpenseNonoperatingNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-300000.0-400000.0-300000.0-400000.0-500000.0-600000.0-700000.0-1400000.0-1200000.0-1500000.0-1600000.0-1800000.0-1800000.0-1700000.0-1900000.0-2100000.0-2000000.0-2200000.0-1000000.0-700000.0-700000.0-800000.0-1100000.0-1000000.0-900000.0-1000000.0-900000.0-800000.0-800000.0-900000.0
Percentage of InterestIncomeExpenseNonoperatingNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.1-0.1-0.1-0.2-0.2-0.2-0.2-0.4-0.3-0.4-0.4-0.5-0.5-0.5-0.5-0.6-0.6-0.7-0.4-0.3-0.3-0.4-0.4-0.4-0.4-0.4-0.3-0.4-0.4-0.4

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest


Net
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302017-12-312017-09-30
Value100000.0000100000.000100000.000
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.00.00.00.0100.00.00.0100.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Net
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302017-12-312017-09-30
Value100000.0000100000.000100000.000
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.00.00.00.0100.00.00.0100.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.0

Operating Expenses

us-gaap:OperatingExpenses

us-gaap:OperatingExpenses


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value7172616111273748079817377747570687064596056505249305850484347483737413933323234773528383329
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.121.419.823.345.919.619.021.821.921.018.721.420.821.019.820.621.621.924.929.325.023.921.119.412.421.717.221.219.621.619.919.720.120.918.318.218.316.317.138.519.115.621.919.417.3

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value37282916-53.440433831364233282838303426321828253441572344252518261922222517243123-20.22223152024
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.48.39.56.3-21.811.011.210.38.79.310.99.27.98.010.99.110.69.013.69.212.512.113.916.223.68.715.111.011.48.211.010.112.111.112.19.413.515.511.7-10.012.012.98.612.014.7

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

us-gaap:OperatingSegments, iosp:FuelSpecialties


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value282325224.73228312432352823283124232638242416252727233624172526221924291916
Percentage of OperatingIncomeLoss77.084.486.7132.1-8.878.565.181.476.090.983.086.283.797.682.382.568.6101.5118.9127.584.665.274.665.548.4100.483.297.269.2143.398.9114.486.1112.2114.0113.370.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.07.08.28.41.98.67.38.46.78.59.07.96.67.88.97.57.39.116.111.710.67.910.410.611.48.712.610.77.911.710.911.610.412.513.810.79.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments iosp:FuelSpecialties19.917.10.018.54.421.80.021.618.121.10.021.317.719.70.019.119.621.20.021.118.711.10.014.215.211.80.015.712.115.70.016.215.217.80.015.414.8

us-gaap:OperatingSegments, iosp:OctaneAdditives


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value0.00.00.00.0-1.6-1.21.20.80.1-2.83.42.75.2-1.47.54.4122.00.21.99.6118.88.02.85.1104.98.3-1.28.52.16.14.84.11.58.0
Percentage of OperatingIncomeLoss0.00.00.00.03.0-2.92.72.10.3-7.77.98.118.4-4.819.514.636.97.60.610.133.643.025.719.44.921.824.119.432.8-6.732.010.827.421.615.98.733.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.0-0.7-0.30.30.20.0-0.70.90.71.5-0.42.11.33.90.70.10.94.25.23.63.11.21.93.62.13.8-0.53.51.13.32.41.90.84.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments iosp:OctaneAdditives0.00.00.00.00.00.00.012.35.30.00.029.352.0-350.00.043.653.329.00.041.356.861.80.039.443.141.80.032.549.4-300.00.028.042.741.40.015.641.9

us-gaap:OperatingSegments, iosp:OilfieldServices


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value2.21.20.2-4.5-12.47.21110.0107.88.07.04.13.01.01.83.73.02.40.0-1.6-5.5-4.87.25.0
Percentage of OperatingIncomeLoss5.94.30.7-26.823.217.626.926.231.921.518.621.014.510.42.66.010.711.47.40.0-5.6-21.5-14.017.58.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.60.40.1-1.7-5.11.93.02.72.82.02.01.91.10.80.30.51.11.01.00.0-0.7-2.6-2.02.82.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments iosp:OilfieldServices2.61.60.0-10.4-29.76.40.08.28.26.80.06.74.33.20.02.24.94.50.00.0-3.4-15.20.09.17.1

us-gaap:OperatingSegments, iosp:PerformanceChemicals


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value171814121215149.3111310129.712109.76.56.02.74.24.76.14.25.47.56.44.76.67.86.56.55.66.55.05.55.67.2
Percentage of OperatingIncomeLoss48.464.949.773.8-22.838.134.024.334.737.324.537.134.341.927.132.118.722.78.422.216.423.812.213.113.127.410.726.230.836.124.428.729.122.521.332.429.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.05.44.74.75.04.23.82.53.03.52.73.42.73.42.92.92.02.01.12.02.12.91.72.13.12.41.62.93.52.92.72.93.52.52.63.14.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments iosp:PerformanceChemicals14.014.50.012.212.713.80.09.310.511.40.010.88.29.80.08.86.26.30.011.413.313.70.012.413.911.10.011.613.111.60.011.714.610.50.012.016.0

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax


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
Value3.8-11.314115.5-7.98.0-12.43.4-5.0-10.2-1.5-17.36.413189.13.5-20.2-0.1-1.81.6-11.45.13.3-8.0-11.8-6.01.0-1.22.82.2-0.2-3.64.31.71.00.2-0.80.4-4.0
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.1-3.34.64.52.2-2.12.0-3.30.9-1.3-2.6-0.4-4.81.83.85.42.81.2-8.5-0.0-0.80.8-4.62.01.4-3.0-4.1-2.60.5-0.51.21.1-0.1-1.82.00.90.60.1-0.40.2-2.1

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value3.8-11.314115.5-7.98.0-12.43.4-5.0-10.2-1.5-17.36.413189.13.5-20.2-0.1-1.81.6-11.45.13.3-8.0-11.8-6.01.0-1.22.82.2-0.2-3.64.31.7
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.1-3.34.64.52.2-2.12.0-3.30.9-1.3-2.6-0.4-4.81.83.85.42.81.2-8.5-0.0-0.80.8-4.62.01.4-3.0-4.1-2.60.5-0.51.21.1-0.1-1.82.00.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value4.4-10.67.0125.9-7.917-12.82.4-5.7-26.4-1.4-16.97.554199.74.5-15.90.2-1.51.9-7.46.04.0-7.243-5.11.8-0.4-3.43.40.8-2.61.71.00.1-2.9-4.5
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.2-3.12.34.62.4-2.14.5-3.40.7-1.5-6.7-0.4-4.72.115.35.83.01.5-6.70.1-0.70.9-3.02.41.6-2.715.0-2.20.8-0.2-1.41.80.4-1.30.90.60.0-1.4-2.4

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.60.7-7.20.20.40.09.4-0.1-0.3-0.2-15.50.20.20.2400.90.80.84.00.30.30.34.00.90.70.8550.90.80.8-6.21.21.01.1
Percentage of OtherComprehensiveIncomeLossNetOfTax13.6-6.6-102.91.76.8-0.054.00.8-12.53.558.7-14.3-1.22.774.24.78.217.8-25.2150.0-20.015.8-54.115.017.5-11.1127.0-17.644.4-200.0182.435.3125.0-42.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.2-2.30.10.20.02.4-0.0-0.1-0.1-3.90.10.10.111.40.30.20.31.70.10.10.11.60.40.30.319.10.40.40.4-2.60.60.50.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value3.8-11.314115.5-7.98.0-12.43.4-5.0-10.2-1.5-17.36.413189.13.5-20.2-0.1-1.81.6-11.45.13.3-8.0-11.8-6.01.0-1.22.82.2-0.2-3.6
Percentage of OtherComprehensiveIncomeLossNetOfTax86.4106.6202.998.393.2100.046.096.9141.787.738.6107.1102.485.324.594.393.877.8127.0-50.0120.084.2154.185.082.5111.1-27.0117.655.6300.0-82.464.7-25.0138.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.1-3.34.64.52.2-2.12.0-3.30.9-1.3-2.6-0.4-4.81.83.85.42.81.2-8.5-0.0-0.80.8-4.62.01.4-3.0-4.1-2.60.5-0.51.21.1-0.1-1.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value3.43.00.03.80.13.90.21.00.04.10.7-1.23.02.53.71.82.1-1.0-2.3-5.08.5-0.32.01.2-4.71.5-0.41.0-0.71.94.9-0.8-1.01.01.3-0.1-4.31.1-2.6-4.37.95.32.411-10.8
Percentage of OtherNonoperatingIncomeExpense100.0100.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.00.90.01.40.01.00.10.30.01.10.2-0.30.80.71.00.50.6-0.3-1.0-2.43.7-0.10.80.5-1.90.6-0.10.4-0.30.92.0-0.4-0.50.50.6-0.1-2.40.5-1.3-2.14.22.91.46.7-6.4

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value22232212-39.7333130222820202122-4.82326172211281831353417
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.36.97.34.8-16.28.98.08.16.27.45.25.76.16.2-1.47.08.05.89.35.512.78.912.814.014.26.6

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value22232212-39.7333130222820202122-4.823261722112818
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.36.97.34.8-16.28.98.08.16.27.45.25.76.16.2-1.47.08.05.89.35.512.78.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Research And Development Expense

us-gaap:ResearchAndDevelopmentExpense

us-gaap:ResearchAndDevelopmentExpense


Research
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value8.69.06.57.78.18.68.49.78.29.18.38.18.78.37.67.98.57.45.86.56.26.96.06.66.56.24.96.05.65.74.65.75.35.65.24.85.04.64.64.74.74.34.64.54.5
Percentage of ResearchAndDevelopmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.42.72.12.93.32.32.12.62.32.32.12.22.42.32.12.42.62.52.43.22.73.32.42.62.72.31.72.62.52.61.93.02.92.82.42.62.82.32.32.32.52.32.62.62.7

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value354339310265244372390371362388395363358360353332326294237205228212246254242269290228221220241192185199213183178200200202186185177174168
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, iosp:FuelSpecialties


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
Value143139138120107147150144133156162134134143146130121126142114129149186190182199216156145164163137126140155127114
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax40.441.044.545.343.939.538.538.736.840.241.037.237.539.841.339.137.242.959.955.756.770.675.774.975.174.174.668.465.674.467.871.368.270.272.569.264.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax40.441.044.545.343.939.538.538.736.840.241.037.237.539.841.339.137.242.959.955.756.770.675.774.975.174.174.668.465.674.467.871.368.270.272.569.264.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments iosp:FuelSpecialties100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, iosp:OctaneAdditives


Revenue
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value0.00.00.0126.51.90.0149.210.00.41810246.94.14.6161720206.5122215160.4257.51411179.619
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.03.21.70.50.03.62.52.80.15.13.07.42.31.72.27.48.48.38.02.74.57.96.67.60.210.63.97.75.88.15.210.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.03.21.70.50.03.62.52.80.15.13.07.42.31.72.27.48.48.38.02.74.57.96.67.60.210.63.97.75.88.15.210.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments iosp:OctaneAdditives0.00.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, iosp:OilfieldServices


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value837457434111212112112211410810495927981766659494636487870
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.521.918.616.317.130.131.232.633.829.427.528.726.525.822.624.623.322.624.924.220.417.119.831.029.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.521.918.616.317.130.131.232.633.829.427.528.726.525.822.624.623.322.624.924.220.417.119.831.029.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments iosp:OilfieldServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, iosp:PerformanceChemicals


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
Value12812511410295113106991041181101141181241091101049431363544394354575157595652474447414644
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.237.136.938.539.130.427.126.928.930.427.931.633.234.431.033.232.132.113.417.915.521.015.917.222.321.417.525.026.825.421.624.824.124.019.425.525.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.237.136.938.539.130.427.126.928.930.427.931.633.234.431.033.232.132.113.417.915.521.015.917.222.321.417.525.026.825.421.624.824.124.019.425.525.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments iosp:PerformanceChemicals100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, iosp:FuelSpecialties, iosp:OtherFuelSpecialties


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value48403533323831473838363736323532322635243525
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.611.811.512.513.310.38.012.810.510.09.310.210.19.010.09.810.08.814.812.015.611.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.611.811.512.513.310.38.012.810.510.09.310.210.19.010.09.810.08.814.812.015.611.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments iosp:FuelSpecialties iosp:OtherFuelSpecialties100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, iosp:FuelSpecialties, iosp:RefineryAndPerformance


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value94991028674108118969511712597981111109788100107899398
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.729.233.032.730.629.230.425.926.330.231.726.927.430.831.229.327.234.145.143.741.146.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.729.233.032.730.629.230.425.926.330.231.726.927.430.831.229.327.234.145.143.741.146.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments iosp:FuelSpecialties iosp:RefineryAndPerformance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, iosp:PerformanceChemicals, iosp:HomeCare


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value2123222121212221232724282629143229260.60.50.60.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.06.87.28.18.75.85.75.76.47.06.27.87.48.24.19.89.09.10.30.20.30.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.06.87.28.18.75.85.75.76.47.06.27.87.48.24.19.89.09.10.30.20.30.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments iosp:PerformanceChemicals iosp:HomeCare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, iosp:PerformanceChemicals, iosp:OtherPerformanceChemicals


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value3334302324282623263028262933372526202.22.62.92.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.310.29.88.810.07.76.86.47.47.87.17.28.39.410.57.68.26.80.91.31.31.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.310.29.88.810.07.76.86.47.47.87.17.28.39.410.57.68.26.80.91.31.31.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments iosp:PerformanceChemicals iosp:OtherPerformanceChemicals100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, iosp:PerformanceChemicals, iosp:PersonalCare


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value73686157496357555461576062605852484729333132
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.820.119.821.520.316.914.614.815.115.714.616.717.516.816.415.714.916.112.216.413.915.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.820.119.821.520.316.914.614.815.115.714.616.717.516.816.415.714.916.112.216.413.915.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments iosp:PerformanceChemicals iosp:PersonalCare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:SellingGeneralAndAdministrativeExpense


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value626354546364667171726364656762606055565653435552504847423741423131353328272728723024332824
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.718.717.720.425.917.316.919.119.618.716.017.818.418.717.718.318.718.823.727.323.320.722.420.720.718.116.218.617.018.917.816.517.017.915.815.415.313.814.435.916.413.018.916.414.3

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value146114261397134313391455146814941489152614731497145114721410131212761225118110431031100110301016998976999774786777794697593584579634603592568597572548
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value28524420319416623111212860129
Percentage of Assets20.416.713.813.814.122.511.316.210.422.7
Percentage of Assets20.416.713.813.814.122.511.316.210.422.7
Percentage of Assets us-gaap:CorporateNonSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, iosp:FuelSpecialties


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value509499470437397633676446
Percentage of Assets36.534.031.931.033.661.567.756.2
Percentage of Assets36.534.031.931.033.661.567.756.2
Percentage of Assets us-gaap:OperatingSegments iosp:FuelSpecialties100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, iosp:OctaneAdditives


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value0.024394138282942
Percentage of Assets0.01.62.73.03.22.82.95.3
Percentage of Assets0.01.62.73.03.22.82.95.3
Percentage of Assets us-gaap:OperatingSegments iosp:OctaneAdditives0.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, iosp:OilfieldServices


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value210316296256240240293
Percentage of Assets15.121.620.118.220.323.429.3
Percentage of Assets15.121.620.118.220.323.429.3
Percentage of Assets us-gaap:OperatingSegments iosp:OilfieldServices100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, iosp:PerformanceChemicals


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value391383463480340137181176
Percentage of Assets28.026.131.534.128.813.318.122.2
Percentage of Assets28.026.131.534.128.813.318.122.2
Percentage of Assets us-gaap:OperatingSegments iosp:PerformanceChemicals100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:StatementGeographical

country:GB


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value455487504258257303216261192253255
Percentage of Assets32.633.234.318.321.829.521.632.933.244.646.6
Percentage of Assets32.633.234.318.321.829.521.632.933.244.646.6
Percentage of Assets country:GB100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

iosp:RestOfEurope


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value171163173317156303953634952
Percentage of Assets12.211.111.722.513.23.03.96.711.08.89.6
Percentage of Assets12.211.111.722.513.23.03.96.711.08.89.6
Percentage of Assets iosp:RestOfEurope100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

iosp:RestOfWorld


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value303528201516190.40.4
Percentage of Assets2.22.41.91.41.31.61.90.10.1
Percentage of Assets2.22.41.91.41.31.61.90.10.1
Percentage of Assets iosp:RestOfWorld100.0100.0100.0100.0100.0100.0100.0100.0100.0

iosp:UnitedStatesNorthAmerica


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value368419402452377410
Percentage of Assets26.428.627.332.131.939.9
Percentage of Assets26.428.627.332.131.939.9
Percentage of Assets iosp:UnitedStatesNorthAmerica100.0100.0100.0100.0100.0100.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value146114261397134313391455146814941489152614731497145114721410131212761225118110431031100110301016998976999774786777794697593584579634603592568597572548
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value973958944925899943918881862848825839819824793747704676653651639618605587549522515457441426409376351333317403385368343311340300157229
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 Assets66.667.267.668.967.264.962.559.057.955.656.056.156.556.056.356.955.155.255.362.562.061.858.757.855.053.551.659.156.154.951.553.959.257.154.763.564.062.360.352.159.654.80.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value-14.6-15.2-15.9-8.7-8.9-9.3-9.3-18.7-18.6-18.3-18.1-2.6-2.8-3.0-3.2-43.5-44.4-46.0
Percentage of StockholdersEquity-1.5-1.6-1.7-0.9-1.0-1.0-1.0-2.1-2.2-2.2-2.2-0.3-0.3-0.4-0.4-5.8-6.3-7.0
Percentage of Assets-1.0-1.1-1.1-0.6-0.7-0.6-0.6-1.3-1.2-1.2-1.2-0.2-0.2-0.2-0.2-3.3-3.5-3.9
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value-63.5-67.9-57.3-64.3-76.4-82.3-74.4-91.8-79.0-81.4-75.7-49.3-47.9-31.0-38.5-92.8-112.0-126.2-110.9-103.5-109.5-113.5-106.3-157.6-152.5-154.3-153.9-169.8-173.2-174.0-171.4-117.2-118.9-119.9-120.0-138.4-135.5-131.6-201.1-120.2
Percentage of StockholdersEquity-6.5-7.1-6.1-6.9-8.5-8.7-8.1-10.4-9.2-9.6-9.2-5.9-5.8-3.8-4.8-12.4-15.9-19.3-18.3-17.6-19.9-21.7-20.6-34.4-34.6-36.2-37.6-45.2-49.3-52.1-54.1-29.1-30.8-32.5-35.0-44.4-39.8-43.8-127.6-52.4
Percentage of Assets-4.3-4.8-4.1-4.8-5.7-5.7-5.1-6.1-5.3-5.3-5.1-3.3-3.3-2.1-2.7-7.1-8.8-10.7-10.8-10.2-11.0-11.6-10.6-20.3-19.4-19.8-19.4-24.3-29.2-29.8-29.6-18.5-19.7-20.3-21.1-23.2-23.7-24.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value-48.9-52.7-41.4-55.6-67.5-73.0-65.1-73.1-60.7-64.1-59.1-48.9-47.4-30.1-36.5-49.8-67.9-80.5
Percentage of StockholdersEquity-5.0-5.5-4.4-6.0-7.5-7.7-7.1-8.3-7.0-7.6-7.2-5.8-5.8-3.7-4.6-6.7-9.6-12.3
Percentage of Assets-3.3-3.7-3.0-4.1-5.0-5.0-4.4-4.9-4.1-4.2-4.0-3.3-3.3-2.0-2.6-3.8-5.3-6.8
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value643607566528532626630673650683663659609622561532519476441479463433458443426391414397405394407363314303296375349339320375349321
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets44.042.640.539.439.843.142.945.143.744.845.144.042.042.339.840.640.738.937.345.945.043.344.543.642.740.141.451.351.650.751.352.052.951.951.259.157.957.356.362.861.058.7

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value94117105665868751101061231239166789065484510116715311313612764464190919080535443221291059176132998910798736813
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.58.27.55.04.34.75.27.47.18.18.46.14.55.36.45.03.83.78.616.014.911.313.312.66.44.84.211.711.611.610.17.79.27.43.920.417.515.413.422.117.30.019.50.00.00.00.0

Receivables Net Current

us-gaap:ReceivablesNetCurrent

us-gaap:ReceivablesNetCurrent


Receivables
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value2812472212062132962922962802962792872772802442452412191541251361461371301311471641171181221351138697115939510099929684
Percentage of ReceivablesNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets19.317.415.815.315.920.419.919.818.819.419.019.219.119.017.318.718.917.913.112.013.314.613.312.813.215.116.415.115.015.717.116.214.616.720.014.715.816.917.515.416.915.4

Inventory Net

us-gaap:InventoryNet

us-gaap:InventoryNet


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value250223220239243246244251248249248261252247209211217199173161155152159166167176184171172160158167149141138143139139135137142122
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets17.115.615.717.818.216.916.716.816.716.316.817.517.416.814.916.117.016.214.715.515.015.215.516.416.818.018.522.222.020.620.024.025.224.323.922.723.223.523.923.024.922.3

Inventory Finished Goods

us-gaap:InventoryFinishedGoods

us-gaap:InventoryFinishedGoods


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1741581561711751711731751781781801891901821451441491401181091031041041091071141271181071019510692817578807981838778
Percentage of InventoryFinishedGoods100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets11.911.111.212.713.111.811.811.712.011.712.212.713.112.410.311.011.711.410.010.510.110.410.110.810.711.712.715.313.713.112.015.215.614.013.012.313.413.514.313.915.214.3

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value1500000.02300000.0400000.0200000.000800000.0200000.01000000.0000600000.01100000.02000000.000001800000.00
Percentage of OtherAssetsCurrent100.0100.0100.0100.00.00.0100.0100.0100.00.00.00.0100.0100.0100.00.00.00.00.0100.00.0
Percentage of Assets0.10.20.00.00.00.00.10.00.10.00.00.00.00.10.20.00.00.00.00.20.0

Noncurrent Assets

us-gaap:NoncurrentAssets

us-gaap:NoncurrentAssets


Noncurrent
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value325343332359409246263189716568
Percentage of NoncurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets23.323.422.625.534.623.926.323.812.411.512.5

us-gaap:NoncurrentAssets us-gaap:StatementGeographical

country:GB


Noncurrent
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value6170714545495429283240
Percentage of NoncurrentAssets18.820.521.512.711.220.020.615.540.049.658.6
Percentage of Assets4.44.84.93.23.94.85.43.75.05.77.3
Percentage of Assets country:GB13.414.414.217.717.816.225.011.214.912.815.7

iosp:RestOfEurope


Noncurrent
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value123116112163207101011111011
Percentage of NoncurrentAssets37.834.033.745.550.74.34.06.116.016.717.0
Percentage of Assets8.87.97.611.617.61.01.01.42.01.92.1
Percentage of Assets iosp:RestOfEurope72.071.464.851.5133.034.326.721.618.021.922.1

iosp:RestOfWorld


Noncurrent
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value0.20.30.30.30.50.40.60.00.0
Percentage of NoncurrentAssets0.10.10.10.10.10.20.20.00.0
Percentage of Assets0.00.00.00.00.00.00.10.00.0
Percentage of Assets iosp:RestOfWorld0.70.81.11.53.22.53.10.00.0

iosp:UnitedStatesNorthAmerica


Noncurrent
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value141156148149155185
Percentage of NoncurrentAssets43.345.444.741.738.075.5
Percentage of Assets10.110.610.110.613.118.0
Percentage of Assets iosp:UnitedStatesNorthAmerica38.237.236.933.141.245.2

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2020-12-312019-12-312018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value464429403321327312300278251174168165161158153185187159161157175155147144146140136137133133135128
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets33.229.227.421.823.223.823.522.721.316.716.416.615.615.615.419.018.720.620.620.322.022.224.824.725.222.122.623.123.522.423.623.4

us-gaap:PropertyPlantAndEquipmentGross us-gaap:BalanceSheetLocation

iosp:FinancialLeases


Property
Period End2020-12-312019-12-31
Value9.09.9
Percentage of PropertyPlantAndEquipmentGross1.92.3
Percentage of Assets0.60.7
Percentage of Assets iosp:FinancialLeases0.00.0

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

us-gaap:Building


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value65605744372120106.55.1
Percentage of PropertyPlantAndEquipmentGross14.114.014.113.415.013.411.16.24.43.8
Percentage of Assets4.74.13.93.13.22.12.11.41.10.9
Percentage of Assets us-gaap:Building0.00.00.00.00.00.00.00.00.00.0

us-gaap:ConstructionInProgress


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value27191616145.25.73.93.58.2
Percentage of PropertyPlantAndEquipmentGross5.94.44.04.95.63.23.02.22.46.1
Percentage of Assets2.01.31.11.11.20.50.60.50.61.4
Percentage of Assets us-gaap:ConstructionInProgress0.00.00.00.00.00.00.00.00.00.0

us-gaap:Equipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value349330311249192128151152129113
Percentage of PropertyPlantAndEquipmentGross75.377.077.376.276.579.581.287.388.284.7
Percentage of Assets25.022.521.217.716.312.415.219.222.319.9
Percentage of Assets us-gaap:Equipment0.00.00.00.00.00.00.00.00.00.0

us-gaap:Land


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value211918177.26.28.87.57.27.1
Percentage of PropertyPlantAndEquipmentGross4.74.64.65.42.93.94.74.34.95.3
Percentage of Assets1.51.31.31.30.60.60.90.91.21.2
Percentage of Assets us-gaap:Land0.00.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2020-12-312019-12-312018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value25323020612413112311310194949089858481105106991009711410497959693909087868679
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets18.215.714.08.59.39.48.98.28.09.08.88.98.38.38.210.810.612.812.812.514.415.016.416.316.614.815.115.315.414.415.114.5

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment us-gaap:BalanceSheetLocation

iosp:FinancialLeases


Accumulated
Period End2020-12-312019-12-31
Value8.08.1
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment3.23.5
Percentage of Assets0.60.6
Percentage of Assets iosp:FinancialLeases0.00.0

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value4.04.04.64.85.75.85.85.75.85.75.96.86.96.77.76.96.86.96.06.16.16.05.45.25.35.15.13.94.44.44.52.42.12.11.01.11.01.01.01.11.1
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value2142092102041981971981952001991961941911961961891861771578078767674728080606160605049494946454645474848
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.614.715.115.214.913.613.513.013.413.113.313.013.213.413.914.414.614.513.37.77.67.77.47.37.38.28.17.87.87.77.67.38.48.48.67.47.67.98.17.98.58.9

us-gaap:PropertyPlantAndEquipmentNet us-gaap:BalanceSheetLocation

iosp:FinancialLeases


Property
Period End2020-12-312019-12-312019-09-302019-06-30
Value1.01.82.22.4
Percentage of PropertyPlantAndEquipmentNet0.50.91.11.2
Percentage of Assets0.10.10.10.2
Percentage of Assets iosp:FinancialLeases0.00.00.00.0

us-gaap:PropertyPlantAndEquipmentNet us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AssetsHeldUnderCapitalLeases


Property
Period End2020-12-312019-12-312018-12-312017-12-31
Value1.01.83.66.2
Percentage of PropertyPlantAndEquipmentNet0.50.91.83.2
Percentage of Assets0.10.10.20.4
Percentage of Assets us-gaap:AssetsHeldUnderCapitalLeases0.00.00.00.0

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value368367371367363361363360364363364366367364361346335335374267267267267268268275276187188187187165148148149140140141141141142143
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets25.225.726.627.327.124.824.724.124.523.824.824.525.324.725.726.426.327.431.725.625.926.726.026.426.928.227.624.323.924.223.623.725.025.425.722.123.323.924.923.724.926.2

us-gaap:Goodwill us-gaap:StatementBusinessSegments

iosp:FuelSpecialties


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value207207207207207228229141117108108
Percentage of Goodwill56.057.257.057.555.585.483.175.178.976.975.8
Percentage of Assets14.914.114.114.717.622.222.917.820.319.119.9
Percentage of Assets iosp:FuelSpecialties0.00.00.00.00.00.033.931.633.038.741.8

iosp:OctaneAdditives


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302010-12-31
Value0.00.00.00.00.00.00.00.01.31.51.82.62.93.54.6
Percentage of Goodwill0.00.00.00.00.00.00.00.00.91.11.31.82.02.53.2
Percentage of Assets0.00.00.00.00.00.00.00.00.20.20.30.50.50.60.8
Percentage of Assets iosp:OctaneAdditives0.00.00.00.00.00.00.00.02.70.00.05.00.00.07.0

iosp:OilfieldServices


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value44444437373737
Percentage of Goodwill12.112.312.310.310.013.913.5
Percentage of Assets3.23.13.02.63.23.63.7
Percentage of Assets iosp:OilfieldServices0.00.00.00.00.00.00.0

iosp:PerformanceChemicals


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value118110112116129394646303030
Percentage of Goodwill31.930.430.732.234.614.616.924.920.221.321.0
Percentage of Assets8.57.57.68.311.03.84.75.95.25.35.5
Percentage of Assets iosp:PerformanceChemicals0.00.00.00.00.00.025.826.526.528.228.7

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-07-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value66707578828210711311812513013614214915816316916417114415015616216817217517818112012112412610468686821191917151619
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.54.95.45.80.06.17.47.77.98.48.59.39.510.310.711.612.912.914.012.214.415.216.216.417.017.618.318.115.515.415.916.015.011.511.711.83.33.23.23.12.62.93.5

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value363640292931323336370.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets2.52.62.92.22.22.22.22.32.42.40.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value5000000.07500000.08200000.05800000.04600000.04700000.05900000.04400000.05400000.06200000.07200000.06900000.08200000.06800000.05100000.03100000.02400000.01100000.0800000.0800000.02300000.0700000.0900000.0900000.01300000.0400000.0700000.0800000.01500000.01400000.01800000.01000000.0700000.01400000.01400000.0900000.0100000.0200000.0600000.0500000.02500000.01900000.0
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.50.60.40.30.30.40.30.40.40.50.50.60.50.40.20.20.10.10.10.20.10.10.10.10.00.10.10.20.20.20.10.10.20.20.10.00.00.10.10.40.3

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value12311498817410812210611712312612712512811711510897595650495267675987515253635647465754435753535745
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.48.07.16.15.57.48.37.17.98.18.68.58.78.78.48.88.58.05.05.44.95.05.16.66.86.18.86.76.66.98.08.27.98.09.98.67.19.69.48.910.18.4

Accrued Income Taxes Current

us-gaap:AccruedIncomeTaxesCurrent

us-gaap:AccruedIncomeTaxesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value6.38.85.55.48.412101514128.6171311158.29.0139.411129.97.94.53.94.85.60.00.00.00.93.23.14.02.92.00.02.76.1
Percentage of AccruedIncomeTaxesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0
Percentage of Assets0.40.60.40.40.60.80.71.01.00.80.61.21.00.81.10.60.71.10.81.11.21.00.80.40.40.50.60.00.00.00.20.60.50.70.50.40.00.51.1

Accrued Liabilities Current

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccruedLiabilitiesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value142131129125118127154159132123132122105130104949190947972658469697177656261738270697282726877827985
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.79.29.39.48.98.810.510.78.98.19.08.27.38.97.47.27.27.48.07.67.16.58.26.87.07.47.78.48.07.99.211.811.911.912.413.012.111.613.513.813.815.6

us-gaap:AccruedLiabilitiesCurrent us-gaap:AwardType

iosp:StockEquivalentUnits


Accrued
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value172415139.87.87.212
Percentage of AccruedLiabilitiesCurrent13.316.011.413.110.49.39.316.5
Percentage of Assets1.21.71.01.00.80.80.71.5
Percentage of Assets iosp:StockEquivalentUnits0.00.00.00.00.00.00.00.0

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value291274252229219266303296303300296290267292261237228221183159149147206196193189222121125127155153128128147152131142146221178158
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets19.919.218.117.116.418.320.719.920.419.720.119.418.419.918.618.117.918.115.515.214.514.720.019.319.419.422.315.716.016.319.622.021.722.125.424.021.824.125.737.131.229.0

Long Term Debt Current

us-gaap:LongTermDebtCurrent

us-gaap:LongTermDebtCurrent


Long
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value0.00.00.00.00.021212115151515101010100.00.00.00.20.40.05.35.45.35.05.05.05.05.05.05.05.0803315
Percentage of LongTermDebtCurrent0.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.01.41.41.51.11.11.11.10.80.80.80.90.00.00.00.00.00.00.70.70.70.70.80.90.90.80.80.80.913.45.82.7

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value121211111111101111110.0
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.80.90.80.80.80.80.70.70.80.70.0

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value0.00.038585813115820720722322321321822924923926813312713913913911513913914893333730344035
Percentage of LongTermDebt0.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.02.94.04.08.810.613.614.115.015.414.515.517.519.519.522.812.912.513.914.313.914.817.718.018.613.35.66.35.25.46.66.2

us-gaap:LongTermDebt us-gaap:CreditFacility

us-gaap:RevolvingCreditFacility


Long
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value0.00.040606013276126126126126116121121141131161143154146133139
Percentage of LongTermDebt0.00.0103.1102.2102.4101.048.160.660.756.356.354.355.452.856.654.859.90.00.00.0100.099.7
Percentage of Assets0.00.03.04.14.18.95.18.38.68.48.77.98.69.211.010.713.613.714.914.612.913.9
Percentage of Assets us-gaap:RevolvingCreditFacility0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LongTermDebt us-gaap:LongtermDebtType

iosp:TermLoan


Long
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value0.00.00.0828282999999991101101101100.0
Percentage of LongTermDebt0.00.00.052.239.739.744.244.246.345.348.044.246.040.90.0
Percentage of Assets0.00.00.05.55.45.66.66.86.77.08.48.69.09.30.0
Percentage of Assets iosp:TermLoan0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value0.00.00.0385858131136186186208208197202219238228258143154146133127139139139115134134142882832252935313010.00.032
Percentage of LongTermDebtNoncurrent0.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0
Percentage of Assets0.00.00.02.94.04.08.89.212.212.613.914.313.414.416.718.718.721.913.714.914.612.912.513.914.213.914.817.117.318.012.64.75.54.34.65.85.25.31.70.05.8

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
Value544646474449
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0
Percentage of Assets3.73.33.43.53.33.4

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent


Pension
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value19192018171717151615151616171614
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.31.41.51.41.31.21.21.01.11.01.11.11.11.21.21.2

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value600000.0500000.0500000.0500000.0500000.0500000.0400000.0400000.0400000.0500000.0500000.0400000.0400000.0400000.0400000.0400000.0400000.0300000.0300000.0300000.0300000.0300000.0300000.0400000.0400000.00
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value2400000.02400000.03400000.02700000.01400000.01500000.01700000.01900000.01900000.02000000.02100000.05300000.05000000.01900000.01400000.0400000.0500000.0900000.01000000.0900000.0300000.0900000.0500000.0100000.0700000.01600000.02000000.01500000.0200000.0100000.0300000.0200000.0200000.02200000.0200000.0100000.0300000.0100000.0800000.0200000.0400000.0500000.0
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.20.10.10.10.10.10.10.10.40.30.10.10.00.00.10.10.10.00.10.00.00.10.20.20.20.00.00.00.00.00.40.00.00.00.00.10.00.10.1

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value242428181820212224260.0
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets1.71.72.11.41.41.41.51.51.61.70.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-312019-12-312019-09-302019-06-302018-12-31
Value9400000.09100000.09000000.08900000.04500000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0100.0
Percentage of Assets0.70.60.60.60.3

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-312019-12-312019-09-302019-06-302018-12-31
Value8200000.05800000.06400000.07200000.03200000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0100.0100.0100.0
Percentage of Assets0.60.40.40.50.2

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-312019-12-312019-09-302019-06-302018-12-31
Value5500000.04400000.04500000.04600000.02300000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0100.0100.0100.0
Percentage of Assets0.40.30.30.30.2

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-312019-12-312019-09-302019-06-302018-12-31
Value3800000.02100000.02400000.03000000.02100000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0100.0100.0100.0100.0
Percentage of Assets0.30.10.20.20.1

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-312019-12-312019-09-302019-06-302018-12-31
Value4600000.02500000.02700000.03200000.04400000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0100.0100.0100.0100.0
Percentage of Assets0.30.20.20.20.3

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value4032333637
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0
Percentage of Assets2.92.22.32.42.4

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-312019-12-312019-09-302019-06-302018-12-31
Value4234363823
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0100.0100.0100.0
Percentage of Assets3.12.42.42.61.6

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-312019-12-31
Value2700000.02200000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0
Percentage of Assets0.20.1

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value973958944925899943918881862848825839819824793747704676653651639618605587549522515457441426409376351333317403385368343311340300157229
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 Assets66.667.267.668.967.264.962.559.057.955.656.056.156.556.056.356.955.155.255.362.562.061.858.757.855.053.551.659.156.154.951.553.959.257.154.763.564.062.360.352.159.654.80.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value-14.6-15.2-15.9-8.7-8.9-9.3-9.3-18.7-18.6-18.3-18.1-2.6-2.8-3.0-3.2-43.5-44.4-46.0
Percentage of StockholdersEquity-1.5-1.6-1.7-0.9-1.0-1.0-1.0-2.1-2.2-2.2-2.2-0.3-0.3-0.4-0.4-5.8-6.3-7.0
Percentage of Assets-1.0-1.1-1.1-0.6-0.7-0.6-0.6-1.3-1.2-1.2-1.2-0.2-0.2-0.2-0.2-3.3-3.5-3.9
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value-63.5-67.9-57.3-64.3-76.4-82.3-74.4-91.8-79.0-81.4-75.7-49.3-47.9-31.0-38.5-92.8-112.0-126.2-110.9-103.5-109.5-113.5-106.3-157.6-152.5-154.3-153.9-169.8-173.2-174.0-171.4-117.2-118.9-119.9-120.0-138.4-135.5-131.6-201.1-120.2
Percentage of StockholdersEquity-6.5-7.1-6.1-6.9-8.5-8.7-8.1-10.4-9.2-9.6-9.2-5.9-5.8-3.8-4.8-12.4-15.9-19.3-18.3-17.6-19.9-21.7-20.6-34.4-34.6-36.2-37.6-45.2-49.3-52.1-54.1-29.1-30.8-32.5-35.0-44.4-39.8-43.8-127.6-52.4
Percentage of Assets-4.3-4.8-4.1-4.8-5.7-5.7-5.1-6.1-5.3-5.3-5.1-3.3-3.3-2.1-2.7-7.1-8.8-10.7-10.8-10.2-11.0-11.6-10.6-20.3-19.4-19.8-19.4-24.3-29.2-29.8-29.6-18.5-19.7-20.3-21.1-23.2-23.7-24.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value-48.9-52.7-41.4-55.6-67.5-73.0-65.1-73.1-60.7-64.1-59.1-48.9-47.4-30.1-36.5-49.8-67.9-80.5
Percentage of StockholdersEquity-5.0-5.5-4.4-6.0-7.5-7.7-7.1-8.3-7.0-7.6-7.2-5.8-5.8-3.7-4.6-6.7-9.6-12.3
Percentage of Assets-3.3-3.7-3.0-4.1-5.0-5.0-4.4-4.9-4.1-4.2-4.0-3.3-3.3-2.0-2.6-3.8-5.3-6.8
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value974959944926899944918882863848825840819824794747704676653652639619605588549515409
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets66.667.367.668.967.264.962.659.057.955.656.056.156.556.056.357.055.255.255.362.562.061.858.857.855.151.651.5

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-31
Value-63.5-67.9-57.3-64.3-76.4-82.3-74.4-91.8-79.0-81.4-75.7-49.3-47.9-31.0-38.5-92.8-112.0-121.7-126.2-110.3-110.5-109.0-110.9-106.3-146.3
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-6.5-7.1-6.1-6.9-8.5-8.7-8.1-10.4-9.2-9.6-9.2-5.9-5.8-3.8-4.8-12.4-15.9-18.0-19.3-16.9-17.3-17.6-18.3-20.6-35.7
Percentage of Assets-4.3-4.8-4.1-4.8-5.7-5.7-5.1-6.1-5.3-5.3-5.1-3.3-3.3-2.1-2.7-7.1-8.8-9.9-10.7-10.6-10.7-10.9-10.8-10.6-18.4
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:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-31
Value339337336334333331330329327326324322321321320317316315315313312311311308308
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest34.835.235.636.137.035.136.037.338.038.439.438.439.238.940.342.545.046.748.248.148.950.351.459.975.4
Percentage of Assets23.223.724.124.924.922.822.522.022.021.422.121.622.221.822.724.224.825.826.730.030.331.130.230.938.9
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:NoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-31
Value0.60.50.50.50.50.50.40.40.40.50.50.40.40.40.40.40.40.30.30.30.30.30.30.00.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.10.10.10.10.10.10.00.00.00.10.10.00.00.00.10.10.10.00.00.00.00.00.00.00.0
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: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:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-31
Value790782758748736788755737707697668658638627605619595579561547536515496391319
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest81.181.580.380.981.883.582.283.681.982.181.078.477.976.076.282.884.685.685.983.983.883.282.075.978.1
Percentage of Assets54.154.854.355.755.054.251.449.347.545.745.444.044.042.642.947.246.747.247.652.552.051.548.239.240.3
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

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-31
Value-93.1-93.6-93.3-93.7-93.8-94.0-93.3-93.3-93.4-93.5-92.8-92.9-93.0-93.2-93.3-97.1-97.1-97.1-97.5-99.0-99.1-99.2-91.8-78.7-73.3
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-9.6-9.8-9.9-10.1-10.4-10.0-10.2-10.6-10.8-11.0-11.2-11.1-11.3-11.3-11.7-13.0-13.8-14.4-14.9-15.2-15.5-16.0-15.2-15.3-17.9
Percentage of Assets-6.4-6.6-6.7-7.0-7.0-6.5-6.4-6.2-6.3-6.1-6.3-6.2-6.4-6.3-6.6-7.4-7.6-7.9-8.3-9.5-9.6-9.9-8.9-7.9-9.2
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value339337336334333331330329327326324322321321320317316315315313312311311310309308308310310309308297292292292290291292291289285286
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets23.223.724.124.924.922.822.522.022.021.422.121.622.221.822.724.224.825.826.730.030.331.130.230.531.031.630.940.139.439.838.942.649.250.050.445.848.349.451.248.450.052.2

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value790782758748736788755737707697668658638627605619595579561547536515496472436409391377356344327330316299281315299284259239256210
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets54.154.854.355.755.054.251.449.347.545.745.444.044.042.642.947.246.747.247.652.552.051.548.246.543.841.939.248.745.344.341.247.353.251.248.549.749.748.045.640.144.938.4

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value-63.5-67.9-57.3-64.3-76.4-82.3-74.4-91.8-79.0-81.4-75.7-49.3-47.9-31.0-38.5-92.8-112.0-121.7-126.2-110.3-110.5-109.0-110.9-103.5-109.5-113.5-106.3-157.6-152.5-154.3-153.9-169.8-173.2-174.0-171.4-117.2-118.9-119.9-120.0-138.4-135.5-131.6-201.1
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-4.3-4.8-4.1-4.8-5.7-5.7-5.1-6.1-5.3-5.3-5.1-3.3-3.3-2.1-2.7-7.1-8.8-9.9-10.7-10.6-10.7-10.9-10.8-10.2-11.0-11.6-10.6-20.3-19.4-19.8-19.4-24.3-29.2-29.8-29.6-18.5-19.7-20.3-21.1-23.2-23.7-24.00.0

Treasury Stock Value

us-gaap:TreasuryStockValue

us-gaap:TreasuryStockValue


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value939393939394939393939292939393979797979999999192888378727272738184838585868888796664
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.46.66.77.07.06.56.46.26.36.16.36.26.46.36.67.47.67.98.39.59.69.98.99.18.88.57.99.49.39.49.211.714.214.314.713.514.314.915.513.311.611.8

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value600000.0500000.0500000.0500000.0500000.0500000.0400000.0400000.0400000.0500000.0500000.0400000.0400000.0400000.0400000.0400000.0400000.0300000.0300000.0300000.0300000.0300000.0300000.0400000.0400000.00
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value1300000.01600000.01400000.01600000.01600000.01200000.01700000.01700000.01600000.01600000.01900000.01100000.01100000.0800000.0800000.01200000.01200000.01000000.0500000.0900000.01000000.0900000.01000000.0900000.0900000.0900000.0900000.0500000.0600000.0600000.0600000.0500000.0-800000.02200000.0-300000.0800000.0800000.0800000.02000000.0700000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value1300000.01600000.01400000.01600000.01600000.01200000.01700000.01700000.01600000.01600000.01900000.01100000.01100000.0800000.0800000.01200000.01200000.01000000.0500000.0900000.01000000.0900000.01000000.0900000.0900000.0900000.0900000.0500000.0600000.0600000.0600000.0500000.0-800000.02200000.0-300000.0800000.0800000.0800000.02000000.0700000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-1.1225855292.45840501369342.3-2.04746122029-5.81917-2.7331218139.45.85.71522
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.36.718.720.912.20.614.910.813.83.417.79.60.6-0.613.413.95.89.512.2-3.010.69.0-1.318.46.99.06.94.73.13.18.912.6

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-8900000.0-10300000.0-8000000.0-7100000.0-6800000.0-7800000.0-7300000.0-6800000.0-5700000.0-11200000.0-9300000.0-9100000.0-12500000.0-4600000.0-7500000.0-9000000.0-4800000.0-3000000.0-48800000.0-59700000.0-3100000.0-4500000.0-59300000.0-4200000.0-2600000.0-4200000.0-4200000.0-2400000.0-2600000.0-1500000.0-4000000.0-2100000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.5-3.0-2.6-2.7-2.8-2.1-1.9-1.8-1.6-2.9-2.4-2.5-3.5-1.3-2.1-2.7-2.2-1.4-20.2-31.0-1.7-2.3-27.7-2.3-1.5-2.1-2.1-1.2-1.4-0.8-2.3-1.2

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-13.0-0.3-12.0-40.2-33.0-1.6-86.1-28.6-61.7-1.5-28.8-0.2-1.4-5.8-15.5-20.6-6.9-8.04564-5.07.6-45.2-5.65.11.0-65.4266.1-22.3-3.41.0
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.7-0.1-3.9-15.2-13.5-0.4-22.0-7.7-17.0-0.4-7.3-0.1-0.4-1.6-4.4-6.2-3.1-3.618.933.5-2.73.8-21.2-3.12.90.5-32.613.23.3-12.0-1.90.6

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-22.611388.4-9.9-7.6-34.64.2-17.40.43125-12.1-12.124
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-6.43.412.53.2-4.0-2.0-8.91.1-4.80.18.07.0-3.4-3.47.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1010101112121112121111121212131212129.69.69.79.29.58.48.88.58.06.57.27.47.04.64.34.53.22.82.82.73.33.63.63.93.83.9
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInInventories


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value255.5-22.2-5.4-2.95.0-8.45.9-1.71.8-13.3108.137-0.7-7.81622-8.76.72.2-7.9-4.70.74.9-6.4-3.71.5121.1-14.4127.94.6-6.63.41.62.6-1.4-3.5154.26.51.0
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Other Operating Capital Net

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value-2700000.01800000.02100000.0300000.00-1700000.02200000.0-300000.0-800000.0800000.01000000.0-1500000.0700000.0200000.0-1200000.02600000.01700000.0500000.00
Percentage of IncreaseDecreaseInOtherOperatingCapitalNet100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-1.1225855292.45840501369342.3-2.04746122029-5.81917-2.7331218139.45.85.71522
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.36.718.720.912.20.614.910.813.83.417.79.60.6-0.613.413.95.89.512.2-3.010.69.0-1.318.46.99.06.94.73.13.18.912.6

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value22232212-39.7333130222820202122-4.82326172211281831353417
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.36.97.34.8-16.28.98.08.16.27.45.25.76.16.2-1.47.08.05.89.35.512.78.912.814.014.26.6

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value22232212-39.7333130222820202122-4.823261722112818
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.36.97.34.8-16.28.98.08.16.27.45.25.76.16.2-1.47.08.05.89.35.512.78.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1300000.01600000.01400000.01600000.01600000.01200000.01700000.01700000.01600000.01600000.01900000.01100000.01100000.0800000.0700000.01200000.01200000.01000000.0500000.0900000.01000000.0900000.01000000.0900000.0900000.0900000.0900000.0500000.0600000.0600000.0600000.0500000.0700000.0700000.0700000.0800000.0800000.0800000.0800000.0700000.0700000.0900000.0300000.0500000.0
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensation us-gaap:AwardType

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1300000.01600000.01400000.01600000.01600000.01200000.01700000.01700000.01600000.01600000.01900000.01100000.01100000.0800000.0800000.01200000.01200000.01000000.0500000.0900000.01000000.0900000.01000000.0900000.0900000.0900000.0
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0114.3100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-8900000.0-10300000.0-8000000.0-7100000.0-6800000.0-7800000.0-7300000.0-6800000.0-5700000.0-11200000.0-9300000.0-9100000.0-12500000.0-4600000.0-7500000.0-9000000.0-4800000.0-3000000.0-48800000.0-59700000.0-3100000.0-4500000.0-59300000.0-4200000.0-2600000.0-4200000.0-4200000.0-2400000.0-2600000.0-1500000.0-4000000.0-2100000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.5-3.0-2.6-2.7-2.8-2.1-1.9-1.8-1.6-2.9-2.4-2.5-3.5-1.3-2.1-2.7-2.2-1.4-20.2-31.0-1.7-2.3-27.7-2.3-1.5-2.1-2.1-1.2-1.4-0.8-2.3-1.2

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-13.0-0.3-12.0-40.2-33.0-1.6-86.1-28.6-61.7-1.5-28.8-0.2-1.4-5.8-15.5-20.6-6.9-8.04564-5.07.6-45.2-5.65.11.0-65.4266.1-22.3-3.41.0
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.7-0.1-3.9-15.2-13.5-0.4-22.0-7.7-17.0-0.4-7.3-0.1-0.4-1.6-4.4-6.2-3.1-3.618.933.5-2.73.8-21.2-3.12.90.5-32.613.23.3-12.0-1.90.6

Payments Of Dividends

us-gaap:PaymentsOfDividends

us-gaap:PaymentsOfDividends


Payments
Period End2020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302016-12-312016-09-302015-12-312015-09-302014-12-312014-09-302013-12-312013-09-30
Value120.0120.0110.09.40.07.80.07.60.06.80.0120.0
Percentage of PaymentsOfDividends100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0

Dividends

us-gaap:Dividends

us-gaap:Dividends


Dividends
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302016-12-312016-09-302015-12-312015-09-302014-12-312014-09-30
Value14120.012120.012110.0109.40.07.80.07.60.06.80.0
Percentage of Dividends100.0100.00.0100.0100.00.0100.0100.00.0100.0100.00.0100.00.0100.00.0100.00.0

us-gaap:Dividends us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividendsus-gaap:
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302016-12-312016-09-302015-12-312015-09-302014-12-312014-09-30
Value14120.012120.012110.0109.40.07.80.07.60.06.80.0
Percentage of Dividends100.0100.00.0100.0100.00.0100.0100.00.0100.0100.00.0100.00.0100.00.0100.00.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.20.60.00.00.02.10.20.10.21.90.20.00.11.10.10.00.10.90.20.00.08.2-0.14.05.16.36.00.10.60.20.00.61.81.30.00.10.90.48.6150.73.42.50.0
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.00.00.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value28.7529.4232.4934.0434.4134.2433.0532.5232.1331.9232.4632.2513.6813.6613.7420.6420.6520.320.3819.9720.2220.2319.8719.55
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value394039381727139.73.82.9
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value47322932422218172319
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-312009-12-31
Value16161615151616141414142.62.62.62.21.82.32.32.32.33.53.93.93.66.36.36.25.99.09.013121212121212128.619
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefits us-gaap:IncomeTaxAuthorityName

iosp:ItalianTaxAuthorities


Unrecognized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312018-09-302018-03-312017-12-31
Value3.43.33.43.33.13.11.00.90.50.40.7
Percentage of UnrecognizedTaxBenefits20.920.621.221.320.418.96.16.419.215.431.8

us-gaap:UnrecognizedTaxBenefits us-gaap:IncomeTaxAuthorityName, us-gaap:ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItem

iosp:ItalianTaxAuthorities, iosp:InterestAccrued


Unrecognized
Period End2021-06-30
Value0.1
Percentage of UnrecognizedTaxBenefits0.6

us-gaap:UnrecognizedTaxBenefits us-gaap:ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItem

iosp:InterestAndPenalties


Unrecognized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-312010-12-31
Value2.82.52.42.22.02.0141.51.20.80.60.30.10.10.10.10.10.30.30.30.30.60.60.50.50.70.71.10.70.60.60.40.3
Percentage of UnrecognizedTaxBenefits17.215.615.014.213.212.287.810.18.25.64.313.65.64.34.34.34.38.67.77.78.39.59.58.18.57.87.88.55.64.84.73.23.5

iosp:UnrecognizedTaxBenefits


Unrecognized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-312010-12-31
Value1313131313142.0131313132.21.72.22.22.22.23.23.63.63.35.75.75.75.48.38.311111112128.3
Percentage of UnrecognizedTaxBenefits82.884.485.085.886.887.812.289.991.894.495.7100.094.495.795.795.795.791.492.392.391.790.590.591.991.592.292.291.594.495.295.396.896.5

us-gaap:UnrecognizedTaxBenefits us-gaap:StatementGeographical

country:US


Unrecognized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value1212121212
Percentage of UnrecognizedTaxBenefits77.978.177.578.779.6

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value1.10.80.00.00.00.00.00.00.07.5104.4
Percentage of DeferredTaxAssetsValuationAllowance100.0100.00.00.00.00.00.00.00.0100.0100.0100.0

iosp:AmortizationOfFiniteLivedIntangibleAssetsTranslationAdjustments

iosp:AmortizationOfFiniteLivedIntangibleAssetsTranslationAdjustments


Amortization
Period End2021-06-302021-03-312020-12-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-30
Value-300000.0900000.0-800000.0-300000.0400000.0-200000.0100000.0-100000.0600000.0-300000.0-100000.0-100000.0100000.00100000.0-100000.0-100000.0100000.000-100000.0100000.0-100000.00100000.0-100000.0-100000.00-100000.0
Percentage of AmortizationOfFiniteLivedIntangibleAssetsTranslationAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.00.0100.0100.0100.00.0100.0100.0100.00.0100.0

iosp:CorporateCosts us-gaap:ConsolidationItems

iosp:CorporateCosts

us-gaap:CorporateNonSegment


Corporate
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value11151013151212131315121214131311121016151210139.37.48.19.010.07.412149.48.511139.17.8
Percentage of CorporateCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

iosp:DeferredFinanceCostsCapitalized us-gaap:CreditFacility

iosp:DeferredFinanceCostsCapitalized

us-gaap:RevolvingCreditFacility


Deferred
Period End2020-09-16
Value300000.0
Percentage of DeferredFinanceCostsCapitalized100.0

iosp:DefinedBenefitPlanNetPeriodicOtherBenefitCost us-gaap:RetirementPlanSponsorLocation

iosp:DefinedBenefitPlanNetPeriodicOtherBenefitCost

country:DE


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value200000.0300000.0200000.0300000.0200000.0200000.00200000.0200000.0100000.0200000.0200000.0100000.0
Percentage of DefinedBenefitPlanNetPeriodicOtherBenefitCost100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

country:GB


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value-1600000.0-1500000.0-1600000.0-1600000.0-1700000.0-2000000.0-1900000.0-1900000.0-1500000.0-1700000.0-1600000.0-1400000.0-1300000.0
Percentage of DefinedBenefitPlanNetPeriodicOtherBenefitCost-800.0-500.0-800.0-533.3-850.0-1000.00.0-950.0-750.0-1700.0-800.0-700.0-1300.0

iosp:EnvironmentalMonitoringExpense

iosp:EnvironmentalMonitoringExpense


Environmental
Period End2020-12-31
Value0
Percentage of EnvironmentalMonitoringExpense0.0

iosp:ForeignExchangeMovements

iosp:ForeignExchangeMovements


Foreign
Period End2021-06-302021-03-31
Value0100000.0
Percentage of ForeignExchangeMovements0.0100.0

iosp:IncreaseDecreaseInUnrecognizedTaxBenefits

iosp:IncreaseDecreaseInUnrecognizedTaxBenefits


Increase
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-0.5-0.41.30.0-1.5-0.3-0.4-0.3-10.8-0.10.0-0.60.00.50.00.00.01.20.40.0-0.32.70.0-0.1-0.43.20.04.0-0.5-0.10.00.4-0.30.2-0.10.0
Percentage of IncreaseDecreaseInUnrecognizedTaxBenefits100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.00.0100.00.00.00.0100.0100.00.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.00.0

iosp:NoncashMovementsOnDefinedBenefitPensionPlans

iosp:NoncashMovementsOnDefinedBenefitPensionPlans


Noncash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-800000.0-800000.0-700000.0-1100000.0-1000000.0-1200000.0-1400000.0-1600000.0-1500000.0-1600000.0-1100000.0-1000000.0-1100000.0-1100000.0-900000.0-900000.0-900000.0-900000.0-1500000.0-1500000.0-1600000.0-1600000.0100000.0100000.0
Percentage of NoncashMovementsOnDefinedBenefitPensionPlans100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

iosp:OtherNonSignificantItemsInclusiveOfInterestAndPenalties us-gaap:StatementGeographical, us-gaap:IncomeTaxAuthority

iosp:OtherNonSignificantItemsInclusiveOfInterestAndPenalties

us-gaap:NonUs, iosp:HistoricalImpairmentOfSubsidiaries


Other
Period End2021-06-302021-03-31
Value0200000.0
Percentage of OtherNonSignificantItemsInclusiveOfInterestAndPenalties0.0100.0

iosp:ProceedsFromRepaymentsOfLongTermDebt

iosp:ProceedsFromRepaymentsOfLongTermDebt


Proceeds
Period End2020-12-312019-12-312018-12-31
Value0.00.0-16.5
Percentage of ProceedsFromRepaymentsOfLongTermDebt0.00.0100.0

iosp:RestructuringChargesIncludingAssetRetirementObligations

iosp:RestructuringChargesIncludingAssetRetirementObligations


Restructuring
Period End2021-06-302021-03-312020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value0.91.0-5.91.21.11.11.01.71.91.61.61.51.51.41.51.21.11.31.13.71.01.01.12.90.70.70.71.90.70.70.62.10.80.60.73.00.9
Percentage of RestructuringChargesIncludingAssetRetirementObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

iosp:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisedInPeriodWeightedAverageExercisePrice us-gaap:AwardType

iosp:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisedInPeriodWeightedAverageExercisePrice

iosp:StockEquivalentUnits


Share
Period End2021-06-302021-03-312020-12-31
Value15.311.360
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisedInPeriodWeightedAverageExercisePrice100.0100.00.0

iosp:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriodWeightedAverageExercisePrice us-gaap:AwardType

iosp:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriodWeightedAverageExercisePrice

iosp:StockEquivalentUnits


Share
Period End2021-06-302021-03-312020-12-31
Value2.760-0.08
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriodWeightedAverageExercisePrice100.00.0100.0

iosp:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodAtDiscountWeightedAverageGrantDateFairValue us-gaap:AwardType

iosp:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodAtDiscountWeightedAverageGrantDateFairValue

iosp:StockEquivalentUnits


Share
Period End2021-06-302021-03-312020-12-31
Value3.0788.940
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodAtDiscountWeightedAverageGrantDateFairValue100.0100.00.0

iosp:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodMarketValueWeightedAverageGrantDateFairValue us-gaap:AwardType

iosp:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodMarketValueWeightedAverageGrantDateFairValue

iosp:StockEquivalentUnits


Share
Period End2021-06-302021-03-312020-12-31
Value032.710
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodMarketValueWeightedAverageGrantDateFairValue0.0100.00.0

iosp:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedOptionsExercisedWeightedAverageGrantDateFairValue us-gaap:AwardType

iosp:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedOptionsExercisedWeightedAverageGrantDateFairValue

iosp:StockEquivalentUnits


Share
Period End2021-06-302021-03-312020-12-31
Value0.2342.820
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedOptionsExercisedWeightedAverageGrantDateFairValue100.0100.00.0

iosp:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedOptionsExercisedWeightedAverageGrantDateFairValue us-gaap:AwardType

iosp:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedOptionsExercisedWeightedAverageGrantDateFairValue

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-312016-06-302016-03-31
Value1.1237.03-3.54-0.6328.63
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedOptionsExercisedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0

iosp:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOtherThanOptionsGrantsInPeriodMarketValueGrossWeightedAverageExercisePrice us-gaap:AwardType

iosp:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOtherThanOptionsGrantsInPeriodMarketValueGrossWeightedAverageExercisePrice

iosp:StockEquivalentUnits


Share
Period End2021-06-302021-03-312020-12-31
Value099.850
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOtherThanOptionsGrantsInPeriodMarketValueGrossWeightedAverageExercisePrice0.0100.00.0

iosp:UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromPriorPeriodTaxPositions

iosp:UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromPriorPeriodTaxPositions


Unrecognized
Period End2021-06-302021-03-312020-09-30
Value300000.00300000.0
Percentage of UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromPriorPeriodTaxPositions100.00.0100.0

iosp:UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromPriorPeriodTaxPositions us-gaap:ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItem

iosp:InterestAndPenalties


Unrecognized
Period End2021-06-302021-03-312020-09-30
Value300000.0100000.0200000.0
Percentage of UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromPriorPeriodTaxPositions100.00.066.7

iosp:UnrecognizedTaxBenefits


Unrecognized
Period End2021-06-302021-03-312020-09-30
Value0-100000.0100000.0
Percentage of UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromPriorPeriodTaxPositions0.00.033.3

us-gaap:AssetRetirementObligationAccretionExpense us-gaap:RestructuringCostAndReserve

us-gaap:AssetRetirementObligationAccretionExpense

iosp:Remediation


Asset
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-30
Value0.91.0-7.31.28.71.11.1
Percentage of AssetRetirementObligationAccretionExpense100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessExitCosts1 us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

us-gaap:BusinessExitCosts1

us-gaap:OperatingSegments, iosp:TetraEthylLead, iosp:OctaneAdditives


Business
Period End2020-12-31
Value200000.0
Percentage of BusinessExitCosts1100.0

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:CommonStockDividendsPerShareCashPaid


Common
Period End2021-06-302020-06-302019-06-30
Value0.570.520.52
Percentage of CommonStockDividendsPerShareCashPaid100.0100.0100.0

us-gaap:DeferredIncomeTaxesAndTaxCredits

us-gaap:DeferredIncomeTaxesAndTaxCredits


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value7.70.10.82.3-6.30.7-0.7-0.2-0.10.23.10.70.01.7-10.40.22.51.00.4-0.60.80.3-1.93.49.41.13.91.10.40.44.90.20.9-0.2110.10.60.2
Percentage of DeferredIncomeTaxesAndTaxCredits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

country:DE


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value-200000.0-300000.0-200000.0-300000.0-200000.0-100000.00-100000.0-100000.0-100000.0-100000.0-100000.0-100000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

country:GB


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value-400000.0-400000.0-200000.0-200000.0-200000.0000-500000.0-500000.0-500000.0-1200000.0-1300000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses200.0133.3100.066.7100.0-0.00.0-0.0500.0500.0500.01200.01300.0

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

country:GB


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value0100000.0-200000.0-200000.0-200000.0-100000.0-300000.0-200000.0-200000.0-300000.0-300000.0-300000.0-200000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

country:GB


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value3.93.94.54.34.55.55.55.65.55.75.76.26.1
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanInterestCost us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPlanInterestCost

country:DE


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value0.00.00.00.00.00.10.00.10.10.00.10.10.0
Percentage of DefinedBenefitPlanInterestCost0.00.00.00.00.0100.00.0100.0100.00.0100.0100.00.0

country:GB


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value1.91.92.92.72.83.63.93.93.73.83.93.93.7
Percentage of DefinedBenefitPlanInterestCost0.00.00.00.00.03600.00.03900.03700.00.03900.03900.00.0

us-gaap:DefinedBenefitPlanServiceCost us-gaap:IncomeStatementLocation, us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:SellingGeneralAndAdministrativeExpenses, iosp:UkPlan


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value400000.0400000.0300000.0300000.0300000.0300000.0200000.0200000.0300000.0200000.0
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanServiceCost us-gaap:IncomeStatementLocation, us-gaap:RetirementPlanSponsorLocation

us-gaap:SellingGeneralAndAdministrativeExpenses, country:DE


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value100000.000100000.000100000.000
Percentage of DefinedBenefitPlanServiceCost25.00.00.033.30.00.033.30.00.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations


Effect
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value400000.0-400000.0500000.0200000.0100000.0-600000.0400000.0-400000.00-100000.00-100000.0-500000.0300000.0200000.0
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0

us-gaap:EnvironmentalRemediationExpense us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

us-gaap:EnvironmentalRemediationExpense

us-gaap:OperatingSegments, iosp:TetraEthylLead, iosp:OctaneAdditives


Environmental
Period End2020-12-31
Value0
Percentage of EnvironmentalRemediationExpense0.0

us-gaap:FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss

us-gaap:FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss


Finite
Period End2021-06-302021-03-312020-12-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-31
Value500000.0-2000000.02100000.01200000.0-1800000.0500000.0-800000.0-200000.0-2600000.01200000.04200000.0-200000.0100000.0000
Percentage of FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:GainLossOnDerivativeInstrumentsNetPretax us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation

us-gaap:GainLossOnDerivativeInstrumentsNetPretax

us-gaap:ForeignExchangeContract, us-gaap:Nondesignated, iosp:OtherNetIncomeExpense


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-1100000.01300000.0800000.0-1100000.0-100000.01900000.0-1400000.01900000.0800000.0200000.0-200000.0-300000.0-800000.0-500000.0-300000.0-1200000.01100000.0-500000.01200000.0200000.01500000.01500000.0
Percentage of GainLossOnDerivativeInstrumentsNetPretax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss

us-gaap:GoodwillForeignCurrencyTranslationGainLoss


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value1.0-4.03.9999999999999993.92.1-1.8
Percentage of GoodwillForeignCurrencyTranslationGainLoss100.0100.0100.0100.0100.0100.0

us-gaap:ImpairmentOfIntangibleAssetsFinitelived

us-gaap:ImpairmentOfIntangibleAssetsFinitelived


Impairment
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value0.00.00.0190.00.00.0
Percentage of ImpairmentOfIntangibleAssetsFinitelived0.00.00.0100.00.00.00.0

us-gaap:ImpairmentOfIntangibleAssetsFinitelived us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Impairment
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value0.00.0190.00.00.0
Percentage of ImpairmentOfIntangibleAssetsFinitelived0.00.0100.00.00.00.0

us-gaap:IncomeTaxExaminationInterestExpense

us-gaap:IncomeTaxExaminationInterestExpense


Income
Period End2020-12-312019-09-302019-06-302019-03-312018-09-30
Value100000.0200000.0300000.0200000.01900000.0
Percentage of IncomeTaxExaminationInterestExpense100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value19201815-43.6-36.013190.5-10.96.220-22.6346.22.68.431-2.4137.0-21.1-2.91.510.0-33.1202.9-1.5-21.4-8.3170.0-13.8-13.020-6.9-6.1-13.90.97.8-8.54.3-4.8
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-5.43.72.6-3.4-11.11.6-2.00.2-5.04.40.3-0.7-2.9-2.8501.6-8.23.9-1.1-2.51.20.41.20.30.30.24.24.4-1.78.0-9.40.5-5.2-0.60.0-1.01.20.85.5-6.0-2.8-0.83.74.3
Percentage of IncreaseDecreaseInAccruedIncomeTaxesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidExpense

us-gaap:IncreaseDecreaseInPrepaidExpense


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-1100000.0-2400000.06700000.0-1800000.0-1800000.0-2100000.05600000.0-2700000.0100000.0100000.03100000.0-300000.0-3400000.0100000.09000000.0-1000000.0-2200000.01000000.0-3500000.03900000.0-200000.0-700000.02200000.0-2400000.0-100000.0-1500000.03300000.00-500000.0-1500000.0-1700000.04000000.0-2200000.0400000.0-300000.0700000.0-800000.0300000.0-1000000.0-1400000.03100000.0-700000.0300000.0-1500000.0
Percentage of IncreaseDecreaseInPrepaidExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInReceivables

us-gaap:IncreaseDecreaseInReceivables


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value333011-9.8-84.17.9-2.620-17.818-6.9112.2330.20.9176418-11.4-10.09.17.60.5-7.6-14.1181.2-4.4-14.28.620-10.6-16.820-2.5-3.90.17.5-3.87.34.3-8.11.8
Percentage of IncreaseDecreaseInReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInRestructuringReserve

us-gaap:IncreaseDecreaseInRestructuringReserve


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-400000.0-200000.0300000.0-300000.08400000.0100000.0-100000.0100000.0-400000.0400000.0600000.01200000.01100000.0700000.0900000.0900000.0900000.01100000.0400000.0600000.0600000.0300000.02700000.00900000.0500000.02600000.0100000.0-1100000.0300000.01300000.0300000.0200000.0100000.01800000.0200000.0200000.0-400000.01600000.0-300000.0-300000.0100000.0-200000.0-500000.0
Percentage of IncreaseDecreaseInRestructuringReserve100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements


Incremental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value241000.0239000.013000.0150000.00213000.022000.0224000.0195000.0157000.021000.0178000.0182000.0205000.0-112000.0428000.0422000.0440000.0-29000.0499000.0470000.0464000.07000.0490000.0469000.0507000.032000.0495000.0271000.0273000.0-62000.0475000.0529000.0611000.0-61000.0683000.0747000.0768000.034000.00793000.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:LossContingencyAccrualProvision us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

us-gaap:LossContingencyAccrualProvision

us-gaap:OperatingSegments, iosp:TetraEthylLead, iosp:OctaneAdditives


Loss
Period End2020-12-31
Value0
Percentage of LossContingencyAccrualProvision0.0

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value0100000.0100000.0-200000.0-200000.0-200000.0100000.0300000.0
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax0.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value0100000.0100000.0-100000.0-200000.0-200000.0-100000.0-100000.0-300000.0-200000.0-200000.0-200000.0-300000.0-200000.0-200000.0-200000.0-200000.0-200000.0-200000.0-200000.0-300000.0-200000.0-300000.0-200000.0-300000.0-200000.0-200000.0-200000.0-300000.0-300000.0-300000.0-200000.0-300000.0-200000.0-300000.0-300000.0-200000.0
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


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
Value0100000.0100000.0-100000.0-200000.0-200000.0-100000.0-100000.0-300000.0-200000.0-200000.0-200000.0-300000.0-200000.0-200000.0-200000.0-200000.0-200000.0-200000.0-200000.0-300000.0-200000.0-300000.0-200000.0-300000.0-200000.0-200000.0-200000.0-300000.0-300000.0-300000.0-200000.0
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value000000100000.00100000.00100000.000100000.0100000.000100000.0100000.000-100000.00100000.00100000.0100000.0100000.00100000.0100000.0100000.00100000.0100000.00100000.0
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax0.00.00.00.00.00.0100.00.0100.00.0100.00.00.0100.0100.00.00.0100.0100.00.00.0100.00.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.00.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax


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
Value3.8-11.314115.5-7.98.0-12.72.7-5.5-10.9-1.6-17.17.314188.93.7-19.9-0.1-1.81.6-16.75.13.3-8.0-11.8-6.01.0-1.22.82.2
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax us-gaap:StatementEquityComponents

us-gaap: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
Value3.8-11.314115.5-7.98.0-12.43.4-5.0-10.2-1.5-17.36.413189.13.5-20.2-0.1-1.81.6-16.75.13.3-8.0-11.8-6.01.0-1.22.82.2
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.0100.0100.0100.0100.0100.0100.097.6125.990.993.693.8101.287.795.098.9102.294.6101.5100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value00000-300000.0-700000.0-500000.0-700000.0-100000.0200000.0900000.01000000.0200000.00000000-100000.0000-100000.0-100000.0-600000.0-200000.0
Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax0.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.0100.00.00.00.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0000100000.0100000.0100000.0100000.0
Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax0.00.00.00.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-500000.01000000.02900000.0-500000.0-100000.01600000.0-900000.01100000.0-300000.0400000.01500000.0200000.01100000.0-100000.0-2000000.0-400000.0-700000.0-100000.02200000.0100000.0-1200000.0400000.0
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value600000.0700000.0500000.0400000.0600000.0200000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value-600000.0-600000.0-400000.0-300000.0-600000.0-200000.00000-400000.0-400000.0-500000.0-400000.0-1000000.0-1100000.0-1000000.0-1000000.0-500000.0-500000.0-600000.0-500000.0-1100000.0-1100000.0-1000000.0-1000000.0-1000000.0-1100000.0-1100000.0-1100000.0-800000.0-1400000.0-1300000.0-1300000.0-1700000.0-300000.0-200000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-600000.0-600000.0-400000.0-300000.0-600000.0-200000.00-400000.0-400000.0-500000.0-400000.0-1000000.0-1100000.0-1000000.0-1000000.0-500000.0-500000.0-600000.0-500000.0-1100000.0-1100000.0-1000000.0-1000000.0-1000000.0-1100000.0-1100000.0-1100000.0-800000.0-1400000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value0100000.0300000.00000000-100000.0-100000.00-100000.0-300000.0-100000.0-300000.0-200000.0-100000.0-100000.0-100000.0-200000.0-200000.0-200000.0-300000.0-300000.0-300000.0-200000.0-300000.0-300000.0-400000.0-300000.0-300000.0-400000.0-600000.00-100000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax0.0100.0100.00.00.00.00.00.00.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:PaymentsForCapitalImprovements

us-gaap:PaymentsForCapitalImprovements


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value9.2108.07.16.87.87.36.45.5108.99.56.73.86.93.36.46.74.34.74.43.15.64.73.93.4
Percentage of PaymentsForCapitalImprovements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForRestructuring

us-gaap:PaymentsForRestructuring


Payments
Period End2021-06-302021-03-312020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value1300000.01200000.01400000.01300000.01000000.01400000.0700000.01000000.0600000.0600000.0900000.0700000.0700000.0600000.0400000.0600000.0600000.0700000.0800000.0900000.01100000.0100000.0500000.0200000.0600000.0800000.0400000.0600000.0400000.0400000.0600000.0500000.0600000.0
Percentage of PaymentsForRestructuring100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDebtIssuanceCosts


Payments
Period End2020-12-312019-12-312018-12-312015-12-312014-12-312013-12-312012-12-31
Value0200000.001500000.00200000.00
Percentage of PaymentsOfDebtIssuanceCosts0.0100.00.0100.00.0100.00.0

us-gaap:PaymentsToDevelopSoftware

us-gaap:PaymentsToDevelopSoftware


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value00000400000.0200000.0500000.0400000.000800000.0600000.04100000.00000001600000.01900000.02400000.02700000.0
Percentage of PaymentsToDevelopSoftware0.00.00.00.00.0100.0100.0100.0100.00.00.0100.0100.0100.00.00.00.00.00.00.0100.0100.0100.0100.0

us-gaap:PensionContributions

us-gaap:PensionContributions


Pension
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.00.00.00.00.0-0.10.20.30.20.30.20.30.20.30.30.20.30.20.30.31.12.72.52.72.83.02.92.92.92.72.62.82.42.32.42.32.62.32.32.37.42.2
Percentage of PensionContributions0.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromLinesOfCredit


Proceeds
Period End2020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.00.00.0820.00.00.00.010.00.0200.010.0186.00.00.00.0458.00.00.030650.021
Percentage of ProceedsFromLinesOfCredit0.00.00.0100.00.00.00.00.0100.00.0100.00.0100.0100.0100.00.00.00.0100.0100.00.00.0100.0100.00.0100.0

us-gaap:ProceedsFromMinorityShareholders

us-gaap:ProceedsFromMinorityShareholders


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312016-12-312016-09-302015-12-312015-09-302014-12-312014-09-30
Value100000.00000100000.0000000-100000.0000
Percentage of ProceedsFromMinorityShareholders100.00.00.00.00.0100.00.00.00.00.00.00.0100.00.00.00.0

us-gaap:ProceedsFromSaleOfTreasuryStock

us-gaap:ProceedsFromSaleOfTreasuryStock


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value1200000.0500000.01000000.0400000.0100000.0700000.00-100000.0300000.01000000.000100000.01000000.05800000.0001000000.01800000.00100000.0200000.00300000.0
Percentage of ProceedsFromSaleOfTreasuryStock100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.00.0100.0100.0100.00.00.0100.0100.00.0100.0100.00.0100.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value600000.0800000.0600000.0200000.0400000.00-100000.0-300000.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-600000.0-700000.0-500000.0-200000.0-400000.00100000.0100000.0300000.0200000.0-200000.0-200000.0-200000.0-200000.0-800000.0-900000.0-800000.0-800000.0-300000.0-300000.0-300000.0-300000.0-6100000.0-900000.0-700000.0-800000.0-800000.0-900000.0-800000.0-800000.0-500000.0-1200000.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value600000.0700000.0500000.0200000.0400000.00-100000.0-100000.0-300000.0-200000.0200000.0200000.0200000.0200000.0800000.0900000.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax-100.0-100.0-100.0-100.0-100.00.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-600000.0-700000.0-500000.0-200000.0-400000.00100000.0100000.0300000.0200000.0-200000.0-200000.0-200000.0-200000.0-800000.0-900000.0-800000.0-800000.0-300000.0-300000.0-300000.0-300000.0-800000.0-900000.0-700000.0-800000.0-800000.0-900000.0-800000.0-800000.0-500000.0-1200000.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.013.1100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedTranslationAdjustment


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value0000000000000000000000-5300000.0000000000
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax-0.0-0.0-0.0-0.0-0.00.00.00.00.00.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.086.9-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0

us-gaap:ReclassificationFromAociCurrentPeriodTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:ReclassificationFromAociCurrentPeriodTax

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value0100000.0100000.000000
Percentage of ReclassificationFromAociCurrentPeriodTax0.0100.0100.00.00.00.00.00.0

us-gaap:RelatedPartyTransactionAmountsOfTransaction us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RelatedPartyTransactionAmountsOfTransaction

iosp:AdvanSix


Related
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value100000.00100000.00100000.0100000.0
Percentage of RelatedPartyTransactionAmountsOfTransaction100.00.0100.00.0100.0100.0

iosp:EuropeanMetalRecyclingLimited


Related
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value300000.0100000.00200000.0-100000.0100000.00400000.0-300000.0300000.0
Percentage of RelatedPartyTransactionAmountsOfTransaction300.00.00.00.0-100.0100.00.00.00.00.0

us-gaap:RepaymentsOfDebtAndCapitalLeaseObligations

us-gaap:RepaymentsOfDebtAndCapitalLeaseObligations


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value100000.0200000.0200000.0300000.0300000.0300000.0400000.0400000.0300000.0600000.0600000.0700000.0700000.0700000.0800000.0600000.0500000.0600000.0300000.0400000.0200000.0200000.000
Percentage of RepaymentsOfDebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RepaymentsOfLinesOfCredit


Repayments
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.0407226730.00.00.00.05.00.0200.0302.0112.05.00.0120.00.021270.08.05.00.04.014
Percentage of RepaymentsOfLinesOfCredit0.0100.0100.0100.0100.00.00.00.00.0100.00.0100.00.0100.0100.0100.0100.0100.00.0100.00.00.0100.0100.00.0100.0100.00.0100.0100.0

us-gaap:RestructuringCharges

us-gaap:RestructuringCharges


Restructuring
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302017-12-312017-09-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.00.20.0210.00.00.02.34.80.00.00.20.20.00.00.00.00.10.00.10.60.00.00.00.20.00.3
Percentage of RestructuringCharges0.0100.00.0100.00.00.00.0100.0100.00.00.0100.0100.00.00.00.00.0100.00.0100.0100.00.00.00.0100.00.0100.0

us-gaap:RestructuringCharges us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Restructuring
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-30
Value0.20.0210.00.00.0-2.3-4.8
Percentage of RestructuringCharges100.00.0100.00.00.00.0-100.0-100.0

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

us-gaap:OperatingSegments, iosp:TetraEthylLead, iosp:OctaneAdditives


Restructuring
Period End2020-12-312020-09-30
Value0.20.0
Percentage of RestructuringCharges100.00.0

us-gaap:RestructuringReserveAccrualAdjustment1 us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

us-gaap:RestructuringReserveAccrualAdjustment1

us-gaap:OperatingSegments, iosp:TetraEthylLead, us-gaap:OperatingSegments


Restructuring
Period End2020-12-31
Value0
Percentage of RestructuringReserveAccrualAdjustment10.0

us-gaap:RestructuringReserveTranslationAdjustment

us-gaap:RestructuringReserveTranslationAdjustment


Restructuring
Period End2021-06-302021-03-312020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value100000.0-400000.0400000.0200000.0-300000.00-100000.0-100000.0-400000.0100000.0100000.0-200000.0200000.0300000.00-300000.0100000.0-100000.0100000.0-100000.0100000.0100000.0-400000.0-100000.0-200000.0000100000.000300000.00-100000.0100000.0-400000.0-100000.0
Percentage of RestructuringReserveTranslationAdjustment100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.00.00.0100.00.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue

iosp:StockEquivalentUnits


Share
Period End2021-06-302021-03-312020-12-31
Value-0.3267.330.37
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue

iosp:StockEquivalentUnits


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1000000.0300000.00200000.0500000.05600000.0500000.0-300000.0900000.06200000.0300000.00800000.01600000.0600000.00200000.0900000.0300000.0300000.0100000.01100000.0200000.0100000.0200000.01900000.0200000.0500000.003000000.0100000.0300000.0600000.01200000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1100000.0600000.0200000.0100000.0400000.04200000.0800000.00600000.02100000.0600000.0400000.0300000.01900000.0900000.00200000.01800000.01000000.0200000.0100000.01500000.0300000.0100000.002000000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue110.0200.00.050.080.075.0160.0-0.066.733.9200.00.037.5118.8150.00.0100.0200.0333.366.7100.0136.4150.0100.00.0105.3

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:StatementScenario, us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

iosp:Discount, us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value0.0592.3200-1.0377.830
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.00.00.0100.0100.00.0

iosp:MarketValue, us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value0.0232.7100018.690
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue40.035.40.00.0-0.024.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationNumberOfEmployeesAffected us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationNumberOfEmployeesAffected

iosp:StockEquivalentUnits


Share
Period End2020-12-31
Value61.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationNumberOfEmployeesAffected100.0

us-gaap:EmployeeStockOption


Share
Period End2020-12-31
Value14.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationNumberOfEmployeesAffected23.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-31
Value5.6927.247.47
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-31
Value-32.5650.547.86
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice us-gaap:StatementScenario, us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice

iosp:Discount, us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value00001.1100
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice0.00.00.00.0100.00.00.0

iosp:MarketValue, us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value099.8500095.70
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice0.00.00.00.00.00.00.0

us-gaap:ShareBasedGoodsAndNonemployeeServicesTransactionModificationOfTermsIncrementalCompensationCost us-gaap:AwardType

us-gaap:ShareBasedGoodsAndNonemployeeServicesTransactionModificationOfTermsIncrementalCompensationCost

us-gaap:EmployeeStockOption


Share
Period End2020-12-31
Value2400000.0
Percentage of ShareBasedGoodsAndNonemployeeServicesTransactionModificationOfTermsIncrementalCompensationCost100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue

us-gaap:EmployeeStockOption


Sharebased
Period End2021-06-302021-03-312020-12-312016-06-302016-03-31
Value33.3532.61-4.2422.321.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueTreasuryStockReissued

us-gaap:StockIssuedDuringPeriodValueTreasuryStockReissued


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1100000.0400000.0700000.0-100000.0400000.01000000.0-400000.0100000.0400000.0700000.0400000.0300000.0-300000.01100000.0
Percentage of StockIssuedDuringPeriodValueTreasuryStockReissued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueTreasuryStockReissued us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value400000.0100000.0300000.0-200000.0200000.0-400000.0-700000.00100000.0-500000.0100000.0200000.0-600000.0-100000.0
Percentage of StockIssuedDuringPeriodValueTreasuryStockReissued36.425.042.9200.050.0-40.0175.00.025.0-71.425.066.7200.0-9.1

us-gaap:TreasuryStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value700000.0300000.0400000.0100000.0200000.01400000.0300000.0100000.0300000.01200000.0300000.0100000.0300000.01200000.0
Percentage of StockIssuedDuringPeriodValueTreasuryStockReissued63.675.057.1-100.050.0140.0-75.0100.075.0171.475.033.3-100.0109.1

us-gaap:TaxCutsAndJobsActOf2017ChangeInTaxRateIncomeTaxExpenseBenefit

us-gaap:TaxCutsAndJobsActOf2017ChangeInTaxRateIncomeTaxExpenseBenefit


Tax
Period End2021-06-302021-03-312020-12-312020-09-30
Value200000.0100000.0200000.0100000.0
Percentage of TaxCutsAndJobsActOf2017ChangeInTaxRateIncomeTaxExpenseBenefit100.0100.0100.0100.0

us-gaap:TreasuryStockValueAcquiredCostMethod

us-gaap:TreasuryStockValueAcquiredCostMethod


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value0.20.60.00.00.02.10.30.00.21.90.20.00.11.10.10.00.10.90.20.00.08.2-0.14.05.16.36.00.10.60.20.00.61.81.30.00.10.90.48.615
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.00.00.00.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStockValueAcquiredCostMethod us-gaap:StatementEquityComponents

us-gaap:TreasuryStock


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value0.20.60.00.00.02.10.30.00.21.90.20.00.11.10.10.00.10.90.20.00.08.2-0.14.05.16.36.00.10.60.20.00.61.81.30.00.10.90.48.615
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.00.00.00.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0

iosp:DeferredFinanceCostsAssetNet

iosp:DeferredFinanceCostsAssetNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value1200000.01300000.01300000.01400000.01400000.0
Percentage of DeferredFinanceCostsAssetNet100.0100.0100.0100.0100.0

iosp:DeferredFinancingCostCapitalized

iosp:DeferredFinancingCostCapitalized


Deferred
Period End2020-12-312019-12-312018-12-31
Value300000.01500000.00
Percentage of DeferredFinancingCostCapitalized100.0100.00.0

iosp:DeferredFinancingCostWriteOff

iosp:DeferredFinancingCostWriteOff


Deferred
Period End2020-12-312019-12-312018-12-31
Value0-2700000.00
Percentage of DeferredFinancingCostWriteOff0.0100.00.0

iosp:DeferredTaxAssetsAccretionExpense

iosp:DeferredTaxAssetsAccretionExpense


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value3200000.03300000.03300000.03300000.05100000.04800000.0900000.0
Percentage of DeferredTaxAssetsAccretionExpense100.0100.0100.0100.0100.0100.0100.0

iosp:DeferredTaxAssetsOperatingLeaseLiabilities

iosp:DeferredTaxAssetsOperatingLeaseLiabilities


Deferred
Period End2020-12-312019-12-31
Value9200000.07400000.0
Percentage of DeferredTaxAssetsOperatingLeaseLiabilities100.0100.0

iosp:DeferredTaxAssetsOperatingLossesCarryForwardsNetOfValuationAllowance

iosp:DeferredTaxAssetsOperatingLossesCarryForwardsNetOfValuationAllowance


Deferred
Period End2020-12-31
Value8700000.0
Percentage of DeferredTaxAssetsOperatingLossesCarryForwardsNetOfValuationAllowance100.0

iosp:DeferredTaxAssetsOtherIntangibleAssets

iosp:DeferredTaxAssetsOtherIntangibleAssets


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value106.05.64.8
Percentage of DeferredTaxAssetsOtherIntangibleAssets100.0100.0100.0100.0

iosp:DeferredTaxAssetsRestructuringProvision

iosp:DeferredTaxAssetsRestructuringProvision


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value1400000.001900000.00
Percentage of DeferredTaxAssetsRestructuringProvision100.00.0100.00.0

iosp:DeferredTaxLiabilitiesCustomerRelationships

iosp:DeferredTaxLiabilitiesCustomerRelationships


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value4400000.04200000.04900000.05800000.00
Percentage of DeferredTaxLiabilitiesCustomerRelationships100.0100.0100.0100.00.0

iosp:DeferredTaxLiabilitiesInvestmentImpairmentRecapture

iosp:DeferredTaxLiabilitiesInvestmentImpairmentRecapture


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value01000000.02000000.03500000.00
Percentage of DeferredTaxLiabilitiesInvestmentImpairmentRecapture0.0100.0100.0100.00.0

iosp:DeferredTaxLiabilitiesRightOfUseAssets

iosp:DeferredTaxLiabilitiesRightOfUseAssets


Deferred
Period End2020-12-312019-12-31
Value9200000.07400000.0
Percentage of DeferredTaxLiabilitiesRightOfUseAssets100.0100.0

iosp:DeferredTaxLiabilitiesTaxDeferredExpenseCompensationAndBenefitsPensions

iosp:DeferredTaxLiabilitiesTaxDeferredExpenseCompensationAndBenefitsPensions


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value201815188.210.09.00.0
Percentage of DeferredTaxLiabilitiesTaxDeferredExpenseCompensationAndBenefitsPensions100.0100.0100.0100.0100.0100.0100.00.0

iosp:DefinedBenefitsPlanCash us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:RetirementPlanName

iosp:DefinedBenefitsPlanCash

us-gaap:FairValueInputsLevel1, iosp:NonusPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value322938
Percentage of DefinedBenefitsPlanCash100.0100.0100.0

iosp:DefinedBenefitsPlanCash us-gaap:RetirementPlanName

iosp:NonusPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value322938
Percentage of DefinedBenefitsPlanCash100.0100.0100.0

iosp:DefiniteBenefitPlanExpectedChangeProjectBenefitObligationDueToDiscountRateChange

iosp:DefiniteBenefitPlanExpectedChangeProjectBenefitObligationDueToDiscountRateChange


Definite
Period End2020-12-31
Value26
Percentage of DefiniteBenefitPlanExpectedChangeProjectBenefitObligationDueToDiscountRateChange100.0

iosp:DefiniteBenefitPlanExpectedNetPensionCostDueChangeInDiscountRate

iosp:DefiniteBenefitPlanExpectedNetPensionCostDueChangeInDiscountRate


Definite
Period End2020-12-31
Value400000.0
Percentage of DefiniteBenefitPlanExpectedNetPensionCostDueChangeInDiscountRate100.0

iosp:DefiniteBenefitPlanExpectedNetPensionCostDueChangeInInflationRate

iosp:DefiniteBenefitPlanExpectedNetPensionCostDueChangeInInflationRate


Definite
Period End2020-12-31
Value1200000.0
Percentage of DefiniteBenefitPlanExpectedNetPensionCostDueChangeInInflationRate100.0

iosp:FinanceLeasesFairValueDisclosure us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

iosp:FinanceLeasesFairValueDisclosure

us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value200000.0400000.0600000.0600000.0800000.01200000.01500000.01800000.02200000.02600000.03300000.03800000.04400000.05200000.05900000.05800000.05800000.04700000.04500000.04500000.03900000.03200000.03100000.03100000.03000000.02900000.02200000.0
Percentage of FinanceLeasesFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value200000.0400000.0600000.0600000.0800000.01200000.01500000.01800000.02200000.02600000.03300000.03800000.04400000.05200000.05900000.05800000.05800000.04700000.04500000.04500000.03900000.03200000.03100000.03100000.03000000.02900000.02200000.0
Percentage of FinanceLeasesFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

iosp:GoodwillHistoricalAccumulatedAmortization us-gaap:StatementBusinessSegments

iosp:GoodwillHistoricalAccumulatedAmortization

iosp:OctaneAdditives


Goodwill
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value2892892892898.7289289289289
Percentage of GoodwillHistoricalAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0

iosp:PerformanceChemicals


Goodwill
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value0.30.30.30.38.70.30.30.30.3
Percentage of GoodwillHistoricalAccumulatedAmortization0.10.10.10.1100.00.10.10.10.1

iosp:NotionalValueOfForeignCurrencyForwardExchangeContracts

iosp:NotionalValueOfForeignCurrencyForwardExchangeContracts


Notional
Period End2020-12-312019-12-312018-12-31
Value127108108
Percentage of NotionalValueOfForeignCurrencyForwardExchangeContracts100.0100.0100.0

iosp:OperatingLossCarryforwardWithoutExpiration

iosp:OperatingLossCarryforwardWithoutExpiration


Operating
Period End2020-12-31
Value1300000.0
Percentage of OperatingLossCarryforwardWithoutExpiration100.0

iosp:OperatingLossCarryforwardsExpectedToRelieved

iosp:OperatingLossCarryforwardsExpectedToRelieved


Operating
Period End2020-12-31
Value24
Percentage of OperatingLossCarryforwardsExpectedToRelieved100.0

iosp:PrepaidExpenseCurrentExcludingTax

iosp:PrepaidExpenseCurrentExcludingTax


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value1112147.99.711148.91111118.48.813134.15.07.26.29.25.25.56.1
Percentage of PrepaidExpenseCurrentExcludingTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

iosp:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageExercisePrice us-gaap:AwardType

iosp:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageExercisePrice

iosp:StockEquivalentUnits


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value3.514.474.354.324.274.173.693.613.553.593.473.362.813.233.13.033.03.023.774.214.194.073.794.013.953.673.413.373.253.213.642.95
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

iosp:ShareBasedCompensationSharesAuthorizedUnderStockEquivalentUnitsExercisePriceRangeNumberOfExercisableOptions us-gaap:AwardType

iosp:ShareBasedCompensationSharesAuthorizedUnderStockEquivalentUnitsExercisePriceRangeNumberOfExercisableOptions

iosp:StockEquivalentUnits


Share
Period End2020-12-312012-12-31
Value53146.094210.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockEquivalentUnitsExercisePriceRangeNumberOfExercisableOptions100.0100.0

iosp:StockEquivalentUnitsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

iosp:StockEquivalentUnitsFairValueDisclosure

us-gaap:FairValueInputsLevel3, us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302013-12-31
Value17201712141224191714151715121311108.99.89.15.85.17.86.27.25.612
Percentage of StockEquivalentUnitsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel3, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302013-12-31
Value17201712141224191714151715121311108.99.89.15.85.17.86.27.25.612
Percentage of StockEquivalentUnitsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedIncomeTaxesNoncurrent

us-gaap:AccruedIncomeTaxesNoncurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value2832323232363636364040393943410.0
Percentage of AccruedIncomeTaxesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:AccruedProfessionalFeesCurrentAndNoncurrent us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:AccruedProfessionalFeesCurrentAndNoncurrent

iosp:SmithGambrellAndRussellLimitedLiabilityPartnership


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-05-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value100000.0100000.0800000.0600000.0200000.0100000.0500000.0400000.0400000.0200000.0300000.0200000.0200000.0100000.0100000.0400000.0300000.0200000.0100000.0500000.0400000.0400000.0200000.0300000.01100000.0
Percentage of AccruedProfessionalFeesCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedAmortizationDeferredFinanceCosts

us-gaap:AccumulatedAmortizationDeferredFinanceCosts


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value500000.0100000.01800000.01100000.0500000.0100000.01500000.0800000.0400000.00
Percentage of AccumulatedAmortizationDeferredFinanceCosts100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value4200000.04100000.04500000.04700000.04300000.03800000.03800000.06500000.04600000.03500000.02900000.04400000.05200000.05300000.04100000.04300000.04300000.04200000.04700000.04400000.04300000.04000000.03600000.03800000.03900000.03700000.03900000.04400000.02900000.02000000.02000000.02300000.02500000.02400000.01900000.01800000.01900000.02000000.02000000.02000000.02100000.02100000.0
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalLeaseObligationsCurrent

us-gaap:CapitalLeaseObligationsCurrent


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value200000.0400000.0500000.0400000.0600000.0800000.01000000.01200000.01300000.01500000.01800000.02000000.02300000.02500000.02700000.02600000.02400000.02000000.01600000.01600000.01100000.0900000.0700000.0700000.0600000.0600000.0500000.00
Percentage of CapitalLeaseObligationsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:CapitalLeaseObligationsNoncurrent

us-gaap:CapitalLeaseObligationsNoncurrent


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value00100000.0200000.0200000.0400000.0500000.0600000.0900000.01100000.01500000.01800000.02100000.02700000.03200000.03200000.03400000.02700000.02900000.02900000.02800000.02300000.02400000.02400000.02400000.02300000.01700000.00
Percentage of CapitalLeaseObligationsNoncurrent0.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value94117105665868751101061231239166789065484510116715311313612764464190919080535422
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value94117105665868751101061231239166789065484510116715311313612764464190919080535422
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-31
Value94117105665868751101061231239166789065101136
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractualObligation us-gaap:OtherCommitments

us-gaap:ContractualObligation

iosp:AdditionalCostToCompleteWip


Contractual
Period End2020-12-312019-12-312018-12-31
Value144.06.0
Percentage of ContractualObligation100.0100.0100.0

us-gaap:DeferredFinanceCostsGross

us-gaap:DeferredFinanceCostsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1800000.01500000.02700000.02700000.02700000.01500000.02600000.02600000.01700000.01700000.0
Percentage of DeferredFinanceCostsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredFinanceCostsNet


Deferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312011-12-14
Value001200000.01300000.01400000.01300000.0500000.0700000.0900000.01100000.01200000.01400000.01600000.01700000.01900000.02000000.02200000.01400000.01100000.01800000.01300000.01700000.01700000.0
Percentage of DeferredFinanceCostsNet0.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxAssetsNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value7400000.07400000.07600000.09400000.08900000.09100000.0
Percentage of DeferredIncomeTaxAssetsNet100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value8672687159493218
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value4832293242221825
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value9.87.38.815182.70.60.30.30.8
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsForeign

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsForeign


Deferred
Period End2020-12-312019-12-312018-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value2.03.60.00.00.84.55.519
Percentage of DeferredTaxAssetsTaxCreditCarryforwardsForeign100.0100.00.00.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value5300000.06700000.04900000.04300000.05500000.05200000.05000000.05200000.05500000.04000000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseOther

us-gaap:DeferredTaxAssetsTaxDeferredExpenseOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value6900000.05900000.04800000.04500000.09500000.05000000.05400000.03900000.04700000.05500000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value2828282726230.00.30.91.5
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value900000.0500000.0500000.00200000.0700000.0500000.02900000.03200000.02200000.0
Percentage of DeferredTaxLiabilitiesOther100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value21191716134.12.72.0
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesUndistributedForeignEarnings

us-gaap:DeferredTaxLiabilitiesUndistributedForeignEarnings


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value2000000.01000000.01100000.00
Percentage of DeferredTaxLiabilitiesUndistributedForeignEarnings100.0100.0100.00.0

us-gaap:DefinedBenefitPensionPlanLiabilitiesNoncurrent us-gaap:IncomeStatementLocation, us-gaap:RetirementPlanSponsorLocation

us-gaap:DefinedBenefitPensionPlanLiabilitiesNoncurrent

us-gaap:SellingGeneralAndAdministrativeExpenses, srt:Europe


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value4.85.15.34.84.64.54.5
Percentage of DefinedBenefitPensionPlanLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPensionPlanLiabilitiesNoncurrent us-gaap:RetirementPlanSponsorLocation, us-gaap:StatementBusinessSegments

srt:Europe, iosp:PerformanceChemicals


Defined
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value5.34.54.24.44.44.44.64.64.7
Percentage of DefinedBenefitPensionPlanLiabilitiesNoncurrent100.0100.00.00.00.00.00.00.00.0

us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent

us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value1211191181201181171151009997951211191171165452504862605755565248450.00.0282623210.0
Percentage of DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.00.0

us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:RetirementPlanName

us-gaap:FairValueInputsLevel1, iosp:NonusPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value172170136
Percentage of DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent146.3146.7142.5

us-gaap:FairValueInputsLevel2, iosp:NonusPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value485442406
Percentage of DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent411.6381.5424.3

us-gaap:FairValueInputsLevel3, iosp:NonusPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value167157142
Percentage of DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent141.9136.2148.6

us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent us-gaap:RetirementPlanName

iosp:NonusPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value876816739
Percentage of DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent743.0704.8770.7

iosp:UkPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value876816739837758
Percentage of DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent743.0704.8770.7721.91579.6

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate


Defined
Period End2020-12-31
Value0.25
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate100.0

us-gaap:DefinedBenefitPlanBenefitObligation us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanBenefitObligation

iosp:GermanPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1513111110
Percentage of DefinedBenefitPlanBenefitObligation100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanBenefitObligation us-gaap:RetirementPlanName, us-gaap:RetirementPlanType

iosp:UkPlan, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value758701643721710
Percentage of DefinedBenefitPlanBenefitObligation4991.45270.75692.06113.67031.7

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter

iosp:UkPlan


Defined
Period End2020-12-31
Value172
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths

iosp:UkPlan


Defined
Period End2020-12-31
Value43
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

iosp:UkPlan


Defined
Period End2020-12-31
Value35
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour

iosp:UkPlan


Defined
Period End2020-12-31
Value36
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree

iosp:UkPlan


Defined
Period End2020-12-31
Value35
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

iosp:UkPlan


Defined
Period End2020-12-31
Value36
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo100.0

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

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets

iosp:InsuranceContracts, us-gaap:FairValueInputsLevel3, iosp:OtherAssetBackedSecuritites, iosp:NonusPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value167157142
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.0100.0100.0

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

iosp:NonUsGovernmentAgenciesDebtSecurities, us-gaap:FairValueInputsLevel1, iosp:NonusPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value999867
Percentage of DefinedBenefitPlanFairValueOfPlanAssets59.462.347.2

iosp:OtherFinancialDerivatives, us-gaap:FairValueInputsLevel2, iosp:NonusPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value-2.3-3.70.5
Percentage of DefinedBenefitPlanFairValueOfPlanAssets-1.4-2.30.4

us-gaap:CorporateDebtSecurities, us-gaap:FairValueInputsLevel2, iosp:NonusPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value488445406
Percentage of DefinedBenefitPlanFairValueOfPlanAssets291.5282.4285.2

us-gaap:DefinedBenefitPlanRealEstate, us-gaap:FairValueInputsLevel1, iosp:NonusPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value404131
Percentage of DefinedBenefitPlanFairValueOfPlanAssets24.026.422.0

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanName

iosp:InsuranceContracts, iosp:NonusPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value167157142
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.0100.0100.0

iosp:InvestmentsMeasuredAtNetAssetValue, iosp:NonusPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value514653
Percentage of DefinedBenefitPlanFairValueOfPlanAssets30.529.637.2

iosp:NonUsGovernmentAgenciesDebtSecurities, iosp:NonusPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value999867
Percentage of DefinedBenefitPlanFairValueOfPlanAssets59.462.347.2

iosp:OtherFinancialDerivatives, iosp:NonusPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value-2.3-3.70.5
Percentage of DefinedBenefitPlanFairValueOfPlanAssets-1.4-2.30.4

us-gaap:CorporateDebtSecurities, iosp:NonusPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value488445406
Percentage of DefinedBenefitPlanFairValueOfPlanAssets291.5282.4285.2

us-gaap:DefinedBenefitPlanRealEstate, iosp:NonusPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value404131
Percentage of DefinedBenefitPlanFairValueOfPlanAssets24.026.422.0

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:RetirementPlanName

us-gaap:FairValueInputsLevel1, iosp:NonusPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value13914098
Percentage of DefinedBenefitPlanFairValueOfPlanAssets83.588.769.2

us-gaap:FairValueInputsLevel2, iosp:NonusPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value485442406
Percentage of DefinedBenefitPlanFairValueOfPlanAssets290.1280.1285.5

us-gaap:FairValueInputsLevel3, iosp:NonusPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value167157142
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.0100.0100.0

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:RetirementPlanName

iosp:NonusPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value843787701
Percentage of DefinedBenefitPlanFairValueOfPlanAssets504.1498.4491.9

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations

iosp:DefinedBenefitPlanDebtSecuritiesAndInsuranceContracts, iosp:UkPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value86.00.860.830.53
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations100.0100.0100.0100.0

iosp:DefinedBenefitPlanEquitySecuritiesAndRealEstate, iosp:UkPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value10.00.10.120.38
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations11.611.614.571.7

us-gaap:DefinedBenefitPlanCashAndCashEquivalents, iosp:UkPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value4.00.040.050.090.09
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations4.74.76.017.00.0

us-gaap:DefinedBenefitPlanWeightedAverageAssetAllocations us-gaap:RetirementPlanSponsorLocation

iosp:NonusPlan


Defined
Period End2020-12-312019-12-312018-12-31
Value11.00.120.09
Percentage of DefinedBenefitPlanWeightedAverageAssetAllocations12.814.010.8

us-gaap:DerivativeFairValueOfDerivativeAsset us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:DerivativeFairValueOfDerivativeAsset

us-gaap:ForeignExchangeContract, us-gaap:FairValueInputsLevel1, us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312016-06-302015-12-312015-09-302014-12-312014-09-302013-12-31
Value1100000.01900000.00200000.000800000.001600000.00200000.0001000000.0
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.00.0100.00.00.0100.00.0100.00.0100.00.00.0100.0

us-gaap:ForeignExchangeContract, us-gaap:FairValueInputsLevel1, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312016-06-302015-12-312015-09-302014-12-312014-09-302013-12-31
Value1100000.01900000.00200000.000800000.001600000.00200000.0001000000.0
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.00.0100.00.00.0100.00.0100.00.0100.00.00.0100.0

us-gaap:DerivativeFairValueOfDerivativeLiability us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:DerivativeFairValueOfDerivativeLiability

us-gaap:ForeignExchangeContract, us-gaap:FairValueInputsLevel1, us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value00500000.0600000.01300000.000500000.00700000.0500000.0200000.0000500000.0600000.0600000.00500000.0300000.00600000.01500000.01800000.01300000.00
Percentage of DerivativeFairValueOfDerivativeLiability0.00.0100.0100.0100.00.00.0100.00.0100.0100.0100.00.00.00.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.00.0

us-gaap:ForeignExchangeContract, us-gaap:FairValueInputsLevel1, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value00500000.0600000.01300000.000500000.00700000.0500000.0200000.0000500000.0600000.0600000.00500000.0300000.00600000.01500000.01800000.01300000.00
Percentage of DerivativeFairValueOfDerivativeLiability0.00.0100.0100.0100.00.00.0100.00.0100.0100.0100.00.00.00.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.00.0

us-gaap:DueToRelatedPartiesCurrentAndNoncurrent us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:DueToRelatedPartiesCurrentAndNoncurrent

iosp:AdvanSix


Due
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value100000.000000
Percentage of DueToRelatedPartiesCurrentAndNoncurrent100.00.00.00.00.00.0

iosp:EuropeanMetalRecyclingLimited


Due
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value100000.00000100000.00400000.0300000.0300000.0100000.0
Percentage of DueToRelatedPartiesCurrentAndNoncurrent100.00.00.00.00.00.00.00.00.00.00.0

iosp:SmithGambrellAndRussellLimitedLiabilityPartnership


Due
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value000100000.000000000000000100000.0100000.0300000.000100000.0
Percentage of DueToRelatedPartiesCurrentAndNoncurrent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions

us-gaap:EmployeeStockOption


Employee
Period End2021-06-302021-03-312020-12-312020-09-30
Value10126.88.4
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:RetirementPlanName

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

us-gaap:OtherAssets, us-gaap:FairValueInputsLevel3, iosp:UkPlan


Fair
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value167157142162152
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiability


Finance
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value600000.01500000.01800000.02200000.02600000.0
Percentage of FinanceLeaseLiability100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiability us-gaap:BalanceSheetLocation

iosp:FinancialLeases


Finance
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value600000.01500000.01800000.02200000.02600000.0
Percentage of FinanceLeaseLiability100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityCurrent us-gaap:BalanceSheetLocation

us-gaap:FinanceLeaseLiabilityCurrent

iosp:FinancialLeases


Finance
Period End2020-12-312019-12-31
Value500000.01000000.0
Percentage of FinanceLeaseLiabilityCurrent100.0100.0

us-gaap:FinanceLeaseLiabilityNoncurrent us-gaap:BalanceSheetLocation

us-gaap:FinanceLeaseLiabilityNoncurrent

iosp:FinancialLeases


Finance
Period End2020-12-312019-12-31
Value100000.0500000.0
Percentage of FinanceLeaseLiabilityNoncurrent100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDue


Finance
Period End2020-12-312019-12-312019-09-302019-06-302018-12-31
Value600000.01600000.02000000.02300000.03300000.0
Percentage of FinanceLeaseLiabilityPaymentsDue100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths


Finance
Period End2020-12-312019-12-31
Value500000.01100000.0
Percentage of FinanceLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour


Finance
Period End2020-12-312019-12-312019-09-302019-06-302018-12-31
Value000100000.0100000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearFour0.00.00.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree


Finance
Period End2020-12-312019-12-312019-09-302019-06-302018-12-31
Value0100000.0200000.0200000.0400000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearThree0.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo


Finance
Period End2020-12-312019-12-312019-09-302019-06-302018-12-31
Value100000.0400000.0600000.0700000.01000000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount


Finance
Period End2020-12-312019-12-31
Value0100000.0
Percentage of FinanceLeaseLiabilityUndiscountedExcessAmount0.0100.0

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent


Finance
Period End2020-12-312019-12-31
Value2.62.4
Percentage of FinanceLeaseWeightedAverageDiscountRatePercent100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value-231.0-226.7-223.6-218.2-212.6-186.8-181.31751691631581521451391321241171111049892867974767166615753484441393736353433323129
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths


Finite
Period End2020-12-31
Value15
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive


Finite
Period End2020-12-31
Value7200000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour


Finite
Period End2020-12-31
Value10
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree


Finite
Period End2020-12-31
Value10
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo


Finite
Period End2020-12-31
Value14
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:FiniteLivedIntangibleAssetsGross


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value29729629829629429329429329529429429529529729529428228224824824824824824725225024718117817717514911010810657545351484848
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:ComputerSoftwareIntangibleAsset


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312015-09-302015-06-302014-09-302014-06-30
Value2.02.32.73.54.85.9434141363634322522
Percentage of FiniteLivedIntangibleAssetsGross0.70.80.91.21.62.014.614.213.914.614.614.113.014.112.6

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value394144454557124125858587581616
Percentage of FiniteLivedIntangibleAssetsGross13.213.914.815.215.519.642.342.634.234.235.533.415.131.2

us-gaap:IntellectualProperty


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value4.45.36.37.28.29.13434343434
Percentage of FiniteLivedIntangibleAssetsGross1.51.82.12.42.83.111.511.511.513.713.7

us-gaap:TechnologyBasedIntangibleAssets


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1819192020315555555555
Percentage of FiniteLivedIntangibleAssetsGross6.36.56.66.87.110.818.718.718.622.222.2

us-gaap:TrademarksAndTradeNames


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value2.02.22.32.52.62.78.98.98.98.98.9
Percentage of FiniteLivedIntangibleAssetsGross0.70.70.80.80.90.93.03.03.03.63.6

us-gaap:GoodwillGross

us-gaap:GoodwillGross


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value368367371603599597599597600599601602603600598583572571611503503504503504504512512424424424424401384384384674674375674674674674
Percentage of GoodwillGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillGross us-gaap:StatementBusinessSegments

iosp:FuelSpecialties


Goodwill
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value207207207207207228229141117108108
Percentage of GoodwillGross56.034.634.634.734.045.344.833.230.616.116.2

iosp:OctaneAdditives


Goodwill
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value0.0236236236236236236236236236236
Percentage of GoodwillGross0.039.439.339.538.746.946.155.761.635.135.1

iosp:OilfieldServices


Goodwill
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value44444437373737
Percentage of GoodwillGross12.17.57.46.26.17.47.3

iosp:PerformanceChemicals


Goodwill
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value118110112116129394646303030
Percentage of GoodwillGross31.918.418.719.521.27.89.111.07.84.54.5

us-gaap:GoodwillImpairedAccumulatedImpairmentLoss

us-gaap:GoodwillImpairedAccumulatedImpairmentLoss


Goodwill
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value0.0236236236236236236236236236236236236236236236236236236236236236236236236236236236236236235235235-234.9234234-234.0-233.7-232.0
Percentage of GoodwillImpairedAccumulatedImpairmentLoss0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillImpairedAccumulatedImpairmentLoss us-gaap:StatementBusinessSegments

iosp:OctaneAdditives


Goodwill
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312012-06-302011-12-312011-06-302010-12-31
Value0.0236236236236236236236235234234233232
Percentage of GoodwillImpairedAccumulatedImpairmentLoss0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0-100.00.0-100.0

us-gaap:GuaranteeObligationsCurrentCarryingValue

us-gaap:GuaranteeObligationsCurrentCarryingValue


Guarantee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-31
Value8400000.08100000.09900000.09600000.04900000.04600000.04700000.05000000.03500000.04700000.0
Percentage of GuaranteeObligationsCurrentCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryRawMaterials

us-gaap:InventoryRawMaterials


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value766463686874707669706772626563666858555150465255595956516155615955586163575753525242
Percentage of InventoryRawMaterials100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryValuationReserves

us-gaap:InventoryValuationReserves


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value2119191818141415141413121210129.49.79.28.68.48.88.68.89.69.49.8109.79.59.19.59.28.99.08.98.37.77.66.65.0
Percentage of InventoryValuationReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2020-12-312019-12-31
Value1110
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0

us-gaap:LiabilityForUncertainTaxPositionsCurrent

us-gaap:LiabilityForUncertainTaxPositionsCurrent


Liability
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value0000000000000000000000000006800000.05400000.02400000.02400000.03000000.03000000.03200000.03200000.03200000.0800000.02200000.02200000.0
Percentage of LiabilityForUncertainTaxPositionsCurrent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilityForUncertainTaxPositionsCurrent us-gaap:ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItem

iosp:InterestAndPenalties


Liability
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-31
Value000000000000000000000000000600000.0400000.0100000.0300000.0300000.0
Percentage of LiabilityForUncertainTaxPositionsCurrent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.08.87.44.210.09.4

iosp:UnrecognizedTaxBenefits


Liability
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-31
Value0000000000000000000000000006200000.05000000.02300000.02700000.02900000.0
Percentage of LiabilityForUncertainTaxPositionsCurrent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.091.292.695.890.090.6

us-gaap:LiabilityForUncertainTaxPositionsNoncurrent

us-gaap:LiabilityForUncertainTaxPositionsNoncurrent


Liability
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value16161615151616141414143.23.13.12.51.82.32.32.32.33.53.93.93.66.36.36.25.99.09.06.27.110.010.09.89.59.59.59.4116.56.4
Percentage of LiabilityForUncertainTaxPositionsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilityForUncertainTaxPositionsNoncurrent us-gaap:ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItem

iosp:InterestAndPenalties


Liability
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-31
Value2.82.52.42.22.02.0141.51.20.80.60.30.10.10.10.10.10.30.30.30.30.60.60.50.50.70.70.50.30.50.30.1
Percentage of LiabilityForUncertainTaxPositionsNoncurrent17.215.615.014.213.212.287.810.18.25.64.312.05.64.34.34.34.38.67.77.78.39.59.58.18.57.87.88.14.25.03.11.1

iosp:UnrecognizedTaxBenefits


Liability
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-31
Value1313131313142.0131313132.21.72.22.22.22.23.23.63.63.35.75.75.75.48.38.35.76.89.59.59.3
Percentage of LiabilityForUncertainTaxPositionsNoncurrent82.884.485.085.886.887.812.289.991.894.495.788.094.495.795.795.795.791.492.392.391.790.590.591.991.592.292.291.995.895.096.998.9

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

us-gaap:LongTermDebtFairValue

us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring


Long
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value0.00.0385858131158207207223223213218229249239268143154146133127139139139115139139148933330
Percentage of LongTermDebtFairValue0.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring


Long
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value0.00.0385858131158207207223223213218229249239268143154146133127139139139115139139148933330
Percentage of LongTermDebtFairValue0.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongtermDebtWeightedAverageInterestRate

us-gaap:LongtermDebtWeightedAverageInterestRate


Longterm
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value2.23.140.03320.02590.01720.0001670.0170.0160.0160.034
Percentage of LongtermDebtWeightedAverageInterestRate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2020-12-312019-12-31
Value3.03.1
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0

us-gaap:OperatingLossCarryforwards

us-gaap:OperatingLossCarryforwards


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312014-12-312013-12-312012-12-312011-12-31
Value67333675750.60.30.30.8
Percentage of OperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:ForeignCountry


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value30293448582.5
Percentage of OperatingLossCarryforwards45.688.493.564.077.20.0

us-gaap:StateAndLocalJurisdiction


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value103.81.3107.00.1
Percentage of OperatingLossCarryforwards15.911.33.514.09.30.0

us-gaap:OperatingLossCarryforwards us-gaap:StatementGeographical

country:US


Operating
Period End2020-12-312019-12-312018-12-312017-12-31
Value363.92.327
Percentage of OperatingLossCarryforwards54.411.66.236.0

us-gaap:PrepaidTaxes

us-gaap:PrepaidTaxes


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-09-302010-12-31
Value3.55.04.28.18.04.72.56.04.31.61.59.85.02.82.84.06.95.24.87.04.94.83.01.61.51.02.00.65.13.4115.04.80.03.50.0
Percentage of PrepaidTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0

us-gaap:RestructuringReserve

us-gaap:RestructuringReserve


Restructuring
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value57575857574949494949494848464642414039393838373535343431313232313030302828282827272728
Percentage of RestructuringReserve100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringReserveCurrent

us-gaap:RestructuringReserveCurrent


Restructuring
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value6600000.06600000.06600000.05200000.06300000.05600000.05600000.03900000.05300000.05300000.05900000.04000000.04100000.04200000.05200000.05900000.06100000.06400000.06700000.05000000.05700000.05400000.06400000.03800000.05100000.04900000.05700000.04100000.04800000.05400000.06200000.03700000.03700000.04200000.05100000.03600000.03300000.03300000.04100000.03500000.04000000.03900000.0
Percentage of RestructuringReserveCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringReserveNoncurrent

us-gaap:RestructuringReserveNoncurrent


Restructuring
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value515151525143434544444344434240363534323432323131292928272627262727262524252424232323
Percentage of RestructuringReserveNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

iosp:StockEquivalentUnits


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value70.8768.6263.9664.063.7963.9259.9159.6459.4259.0152.4552.3552.3151.1446.6546.4146.3145.9733.432.9931.72
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant

us-gaap:EmployeeStockOption


Share
Period End2020-12-31
Value2550000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:EmployeeStockOption


Sharebased
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value53.5751.9745.3144.2743.5943.5941.3541.4441.4341.1636.0636.1441.8440.9735.6926.6826.6526.4321.6820.8320.4420.3720.1916.17
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStockShares

us-gaap:TreasuryStockShares


Treasury
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value4959000.04985900.04993700.05047300.05059000.05068200.05074700.05120800.05130200.05138000.05151500.05204200.05416900.05417900.05423700.05483300.05572700.05580400.05583600.05453100.05472800.05404900.05291400.05263500.05126200.05141100.05168000.05207900.05799300.06005600.06054800.06222100.06274800.06339800.06485600.06507100.06203800.05807300.05851300.0
Percentage of TreasuryStockShares100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate


Unrecognized
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value1616161514
Percentage of UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate100.0100.0100.0100.0100.0

Line plots across dimensions of each concept


Gross Margin
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Gross  Marginus-gaap: Consolidation Items, us-gaap: Statement Business Segments
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:GrossProfit
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Gross Profitus-gaap: Consolidation Items, us-gaap: Statement Business Segments
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: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:StatementBusinessSegments, us-gaap:Subsegments
('us-gaap:OperatingSegments', 'iosp:FuelSpecialties', None)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Consolidation Items, us-gaap: Statement Business Segments, us-gaap: Subsegments
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments, us-gaap:Subsegments
('us-gaap:OperatingSegments', 'iosp:PerformanceChemicals', None)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Consolidation Items, us-gaap: Statement Business Segments, us-gaap: Subsegments
us-gaap:Assets
us-gaap:StatementGeographical
(None,)
Assetsus-gaap: Statement Geographical
us-gaap:Assets
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Assetsus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:NoncurrentAssets
us-gaap:StatementGeographical
(None,)
Noncurrent Assetsus-gaap: Statement Geographical
us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Property Plant And Equipment Grossus-gaap: Property Plant And Equipment By Type
us-gaap:Goodwill
us-gaap:StatementBusinessSegments
(None,)
Goodwillus-gaap: Statement Business Segments
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents
(None,)
Stockholders Equity Including Portion Attributable To Noncontrolling Interestus-gaap: Statement Equity Components