CLH


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

Table of contents



us-gaap:CommonStockValue
us-gaap:StatementEquityComponents
us-gaap:SharesIssued

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:CostOfGoodsAndServicesSold
us-gaap:ProductOrService

us-gaap:CostOfRevenue

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaidNet

us-gaap:InterestIncomeExpenseNet
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:InterestIncomeExpenseNonoperatingNet

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:OperatingIncomeLoss

us-gaap:OtherNonoperatingIncomeExpense

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

us-gaap:Revenues

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:Assets
us-gaap:StatementGeographical

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:MarketableSecuritiesCurrent

us-gaap:AccountsReceivableNetCurrent

us-gaap:InventoryNet
us-gaap:PublicUtilitiesInventory

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:AmortizationOfIntangibleAssets

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

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

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

us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:IntangibleAssetsNetIncludingGoodwill
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:AccruedLiabilitiesCurrent

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:LiabilitiesCurrent

us-gaap:LongTermDebtCurrent
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:TaxesPayableCurrent

us-gaap:LiabilitiesNoncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DepreciationDepletionAndAmortization

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInInventories

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:RepaymentsOfLongTermDebt

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

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance

clh:AccretionOfEnvironmentalLiabilities

clh:AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForCurrencyTranslationAndOther
us-gaap:EnvironmentalRemediationSite

clh:AmountOfAnnualAggregateSelfInsuredCorridorRetentionUnderUmbrellaPolicy

clh:AssetRetirementObligationChangesRecordedInBalanceSheet
clh:ClosureAndPostClosureLiabilities

clh:AssetRetirementObligationChangesRecordedInStatementOfIncome
clh:ClosureAndPostClosureLiabilities

clh:AssetRetirementObligationLiabilitiesAssumedInAcquisition
clh:ClosureAndPostClosureLiabilities

clh:AssetRetirementObligationsDiscountRate

clh:DepreciationExpenseInclusiveOfLandfillAndFinanceLeaseAmortization

clh:DepreciationInclusiveofAmortization

clh:EmployeeRetentionCreditAmountCARESAct

clh:IncomeLossFromContinuingOperationsBeforeInterestTaxDepreciationAndAmortizationNet
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementEquityComponents
clh:InterestExpenseNet
dei:LegalEntity, us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
clh:NumberOfServiceLocation

us-gaap:AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses
us-gaap:EnvironmentalRemediationSite

us-gaap:AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForRevisionInEstimates
us-gaap:EnvironmentalRemediationSite

us-gaap:AccrualForEnvironmentalLossContingenciesPayments1
us-gaap:EnvironmentalRemediationSite
clh:ContingenciesByNatureOfContingency, us-gaap:EnvironmentalRemediationSite
us-gaap:AccrualForEnvironmentalLossContingenciesPeriodIncreaseDecrease
us-gaap:EnvironmentalRemediationSite

us-gaap:AmortizationOfFinancingCostsAndDiscounts
us-gaap:AssetAcquisition
us-gaap:AssetAcquisitionConsiderationTransferred

us-gaap:AssetRetirementObligationAccretionExpense
clh:ClosureAndPostClosureLiabilities

us-gaap:AssetRetirementObligationForeignCurrencyTranslationGainLoss
clh:ClosureAndPostClosureLiabilities

us-gaap:AssetRetirementObligationLiabilitiesIncurred
clh:ClosureAndPostClosureLiabilities

us-gaap:AssetRetirementObligationLiabilitiesSettled
clh:ClosureAndPostClosureLiabilities
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationConsiderationTransferred1

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense

us-gaap:FinanceLeasePrincipalPayments

us-gaap:GainLossOnSaleOfBusiness

us-gaap:GoodwillAcquiredDuringPeriod
us-gaap:BusinessAcquisition
us-gaap:StatementBusinessSegments

us-gaap:GoodwillForeignCurrencyTranslationGainLoss
us-gaap:StatementBusinessSegments

us-gaap:GoodwillPurchaseAccountingAdjustments
us-gaap:StatementBusinessSegments

us-gaap:GoodwillWrittenOffRelatedToSaleOfBusinessUnit
us-gaap:StatementBusinessSegments

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInOutstandingChecksFinancingActivities

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InvestmentIncomeInterest

us-gaap:OciBeforeReclassificationsBeforeTaxAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

us-gaap:OtherIncreaseDecreaseInEnvironmentalLiabilities

us-gaap:OtherNoncashIncomeExpense

us-gaap:PaymentsForEnvironmentalLiabilities

us-gaap:PaymentsOfFinancingCosts

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
us-gaap:PaymentsToAcquireBusinessesGross

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

us-gaap:PaymentsToAcquireIntangibleAssets

us-gaap:ProceedsFromDivestitureOfBusinesses

us-gaap:ProceedsFromIncomeTaxRefunds

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromSaleOfProductiveAssets

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:RepaymentsOfLinesOfCredit
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:RepaymentsOfUnsecuredDebt

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:StockRepurchasedAndRetiredDuringPeriodShares

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue
us-gaap:StatementEquityComponents

us-gaap:UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions

clh:AccrualForWorkersCompensationComprehensiveGeneralLiabilityAndVehicleLiabilitySelfInsurancePrograms

clh:AccruedCappingClosurePostClosureAndRemedialLiabilitiesCurrent

clh:AccruedInsuranceEmployeeMedicalInsuranceCosts
clh:LongLivedAssetsByName
clh:AirspaceConsumedFromLandfill

clh:AnnualAggregateSelfInsuredCorridorRetention

clh:AnticipatedPaymentForAssetRetirementObligationsAfterYearFive

clh:AnticipatedPaymentForAssetRetirementObligationsYearFive

clh:AnticipatedPaymentForAssetRetirementObligationsYearFour

clh:AnticipatedPaymentForAssetRetirementObligationsYearOne

clh:AnticipatedPaymentForAssetRetirementObligationsYearThree

clh:AnticipatedPaymentForAssetRetirementObligationsYearTwo

clh:AnticipatedSelfInsurancePaymentsThereafter

clh:AnticipatedSelfInsurancePaymentsYearFive

clh:AnticipatedSelfInsurancePaymentsYearFour

clh:AnticipatedSelfInsurancePaymentsYearOne

clh:AnticipatedSelfInsurancePaymentsYearThree

clh:AnticipatedSelfInsurancePaymentsYearTwo

clh:AssetsNoncurrentExcludingPropertyPlantAndEquipment

clh:CashEquivalentsandMarketableSecuritiesCurrent

clh:DeferredTaxAssetsClosurePostClosureAndRemedialLiabilities

clh:DeferredTaxAssetsOperatingLeaseLiabilities

clh:DeferredTaxAssetsValuationAllowanceDeferredTaxAssetsOfSubsidiary

clh:DeferredTaxAssetsValuationAllowanceForeignNetOperatingLossCarryforwards

clh:DeferredTaxAssetsValuationAllowanceForeignTaxCredits

clh:DeferredTaxAssetsValuationAllowanceRealizedAndUnrealizedCapitalLosses

clh:DeferredTaxAssetsValuationAllowanceStateNetOperatingLossCarryforwards

clh:DeferredTaxLiabilitiesNetBeforeValuationAllowance

clh:DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets

clh:DiscountReserves

clh:EnergyRelatedInventoryOther

clh:EnergyRelatedInventorySuppliesAndDrums

clh:FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour

clh:IntangibleAssetsNetExcludingGoodwillPercent
us-gaap:StatementGeographical

clh:LandfillFinalClosureAndPostClosureLiabilities
clh:ContingenciesByNatureOfContingency
clh:LossContingencyRangeOfLoss
clh:ContingenciesByNatureOfContingency
clh:LossContingencyRangeOfPossibleLossMinimum

clh:NonLandfillClosureAndPostClosureLiabilities

clh:PrepaidExpensesAndOtherAssetsCurrent

clh:ProbableAirspace

clh:PropertyPlantAndEquipmentNetPercent
us-gaap:StatementGeographical

clh:ReservesToBeProvidedOverRemainingSiteLives

clh:SelfInsuranceDiscountRate

clh:UnbilledAccountsReceivableCurrent

clh:UndiscountedClosureAndPostClosureLiabilities

clh:UndiscountedSelfInsuranceLiabilities

clh:UnrecognizedTaxBenefitsAndOtherLongTermLiabilitiesNoncurrent
dei:LegalEntity, us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
dei:EntityNumberOfEmployees

us-gaap:AccrualForEnvironmentalLossContingencies
clh:ContingenciesByNatureOfContingency
us-gaap:EnvironmentalExitCostByProperty
us-gaap:EnvironmentalRemediationSite
us-gaap:StatementGeographical, us-gaap:EnvironmentalExitCostByProperty

us-gaap:AccrualForEnvironmentalLossContingenciesDiscount

us-gaap:AccrualForEnvironmentalLossContingenciesGross

us-gaap:AccrualForEnvironmentalLossContingenciesUndiscountedDueAfterFifthYear

us-gaap:AccrualForEnvironmentalLossContingenciesUndiscountedDueInFifthYear

us-gaap:AccrualForEnvironmentalLossContingenciesUndiscountedDueInFourthYear

us-gaap:AccrualForEnvironmentalLossContingenciesUndiscountedDueInSecondYear

us-gaap:AccrualForEnvironmentalLossContingenciesUndiscountedDueInThirdYear

us-gaap:AccrualForEnvironmentalLossContingenciesUndiscountedDueWithinOneYear

us-gaap:AccruedCappingClosurePostClosureAndEnvironmentalCosts

us-gaap:AccruedCappingClosurePostClosureAndEnvironmentalCostsNoncurrent

us-gaap:AccruedEnvironmentalLossContingenciesCurrent

us-gaap:AccruedEnvironmentalLossContingenciesNoncurrent

us-gaap:AccruedInsuranceCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AssetRetirementObligation
clh:ClosureAndPostClosureLiabilities

us-gaap:CapitalizedContractCostNet

us-gaap:DebtInstrumentCarryingAmount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentInterestRateEffectivePercentage
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

us-gaap:DeferredFinanceCostsCurrentNet

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsDerivativeInstruments

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsDomestic

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsForeign

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsForeign

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesPrepaidExpenses

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DerivativeLiabilities

us-gaap:DerivativeLiabilitiesCurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EnergyRelatedInventoryChemicals

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseRightOfUseAsset
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:IntangibleAssetsGrossExcludingGoodwill

us-gaap:InterestPayableCurrent

us-gaap:InterestRateCashFlowHedgeLiabilityAtFairValue

us-gaap:InventoryCrudeOilProductsAndMerchandise

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LettersOfCreditOutstandingAmount

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:LongTermDebtFairValue

us-gaap:LossContingencyAccrualAtCarryingValue
clh:ContingenciesByNatureOfContingency

us-gaap:MarketableSecurities
us-gaap:FinancialInstrument

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization

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

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:SelfInsuranceReserve
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1

us-gaap:Supplies

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued

us-gaap:UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued
us-gaap:ValuationAllowancesAndReservesType
us-gaap:ValuationAllowancesAndReservesBalance

Plots across concepts


IncomeStatement
Net Income Loss
Expenses
Other Nonoperating Income Expense
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Operating Lease Right Of Use Asset
Current Assets
Marketable Securities Current
NonCurrent Assets
Other Assets Noncurrent
Liabilities
Derivative Liabilities
Current Liabilities
Long Term Debt Current
Noncurrent Liabilities
Other Liabilities Noncurrent
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Increase Decrease In Inventories
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
OperatingLeaseLiability
Operating Lease Liability Current
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four
FiniteLivedIntangibleAssets
Finite Lived Intangible Assets Net
AccountsReceivable
Allowance For Doubtful Accounts Receivable Current

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:CommonStockValue ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇███████████▇▆▆▆▆▆▁▁0.5440.5460.5480.5520.5560.5560.5580.5580.5590.5580.5580.560.5610.5620.5650.5690.5720.5720.5730.5740.5750.5760.5760.5770.5840.5870.5890.60.6060.6070.6070.6060.6060.6050.6040.5340.5330.5330.5320.530.530.2640.264NANANA
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:CommonStock▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇███████████▇▆▆▆▆▆▁▁54.39354.55154.77355.24655.61355.55555.79855.80855.85955.82855.84755.99856.08756.24556.50156.92757.15457.18957.29857.3957.49557.55157.59357.66558.42858.66158.90359.94860.57960.71860.67260.61260.5560.49160.38553.38653.31953.25653.18353.03852.98626.4526.386NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding ▁█54.85455.043NA55.73855.74856.055NA56.16556.06656.082NA56.29156.50556.457NA57.19557.33657.262NA57.48757.67857.617NA58.26858.7158.875NA60.36960.77860.861NA60.7660.68760.63NA53.56553.50553.488NA53.3753.36226.579NA52.96352.84926.371
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic ▁█54.52954.723NA55.59255.5955.757NA55.8555.87555.848NA56.05956.4156.457NA57.03357.1957.262NA57.48757.54957.617NA58.16158.5958.875NA60.36960.66560.72NA60.6160.5560.464NA53.37453.30853.227NA53.02352.93926.399NA52.65852.58126.251
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities clh:PerformanceStockAwardsNA0.034219NA0.2358060.0960180.121726NA0.1470750.075759NANANANANANANANANANANA0.348197NANA0.2742570.19618NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities clh:RestrictedStockAwardsAndPerformanceAwards0.0005NANANA0.14946NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities us-gaap:RestrictedStockNA0.006NA0.0161830.149460.009925NA0.0035670.004623NANANANANANANANANANANA0.009537NANA0.0107040.0110750.539983NA0.6241450.005270.101059NA0.173NANANANANANANANANANANANANANA
us-gaap:EarningsPerShareBasic ▇▆▆▇▆▅▆▆▆▅▅▆▆▄█▅▆▄▄▄▅▄▅▆▅▄▆▁▆▅▆▆▅▅▇▅▆▆▆▆▆▇▆▆▇▆1.230.40.71000000000000020.990.520.210.430.650.650.020.290.550.55-0.221.480.210.45-0.37-0.22-0.180.07-0.360.010.690.18-0.120.46-1.550.470.150.440.580.380.171.110.230.440.60.720.70.550.860.440.741.10.4
us-gaap:EarningsPerShareDiluted ▇▅▆▇▆▅▆▆▆▅▅▆▆▄█▅▆▄▄▄▅▄▅▆▅▄▆▁▆▅▆▆▅▅▇▅▆▆▆▆▆▇▆▆▇▆1.220.390.710.990.520.210.430.650.650.020.290.550.54-0.221.480.210.45-0.37-0.22-0.180.07-0.360.010.690.18-0.120.46-1.550.470.150.440.580.380.171.110.230.440.60.720.70.550.860.440.731.10.4
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 COGS Ratio us-gaap:ProductOrService us-gaap:Product█▅▃▃▁▅▅▆▆▄▆▆▆▄▅▅▅191.895145.44110.61898.03872.161138.696139.786151.749153.593124.181150.646157.998152.361130.059132.259143.494141.848NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 COGS Ratio us-gaap:ProductOrService us-gaap:Service█▄▅▅▂▇██▇▃▆▅▆▁▁▁▁734.563662.708685.572681.306637.839719.867731.219739.919715.085656.658707.558685.183696.779619.719615.144612.352610.94NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 TTM Greenblatt ROC _ _█▅▆▇▆▅▅▇▆▄▅▆▆▃▄▅▅▃▄▄▅▃▄▇▆▃▆▁▆▄▆▆▅▅▅▆▅▆▆▆▅▅▅110.00150.85561.74183.87960.2245.49652.30780.36773.04823.73441.48565.74564.35310.99127.93547.66346.7445.43321.94316.80234.504-4.08725.54993.9760.7587.30257.537-42.74867.11529.90658.87773.60853.24334.82836.23156.73947.53361.70159.24766.79251.88439.74242.998NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AllocatedShareBasedCompensationExpense ▄▄▇█▄▄▄▆▅▇▇▅▄▄▅▅▄▃▄▄▃▃▃▁▅▂▃▃▃▃3.33.55.86.72.83.33.15.03.85.86.14.13.53.13.94.02.92.32.83.02.62.12.00.54.31.82.42.12.02.3NANANANANANANANANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTax █▅▇▇▆▁▆▅▆▄▂▆▅▂█▆▆▃▃▃▄▅77.71533.68467.29967.29546.551-47.73437.7926.9541.325.0-21.43539.67925.805-29.37781.25535.76740.978-15.342-15.495-11.5662.78824.966NANANANANANANANANANANANA120.2529.98-17.45715.18146.383-58.1443.12616.481NANANANA
us-gaap:CostOfGoodsAndServicesSold ▇▆▅▅▄▇▇▇▇▆▇▆▆▅▅▅▅▄▄▄▄▃▅██▅▇▇▇▇██▇█▂▁▁▂617.886560.536548.775511.629470.681606.666615.768612.754594.933564.364594.857580.685583.584546.425526.69519.595519.803496.585496.661491.915480.002464.279522.965634.646652.688546.507610.72598.407606.95625.719645.164647.119614.326636.024399.743372.94367.623400.315NANANANANANANANA
us-gaap:CostOfRevenue ▇▆▅▅▄▇▇▇▇▆▇▆▆▅▅▅▅▄▄▄▄▃▅██▅▇▇▇▇██▇█▂▁▁▂617.886560.536548.775511.629470.681606.666615.768612.754594.933564.364594.857580.685583.584546.425526.69519.595519.803496.585496.661491.915480.002464.279522.965634.646652.688546.507610.72598.407606.95625.719645.164647.119614.326636.024399.743372.94367.623400.315NANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments █▅▆▇▆▅▅▆▆▄▅▆▆▃▄▅▆▃▄▄▄▃▄▇▆▃▆▁▆▅▆▆▅▅▅▅▆▆▆▆▆▆▆▇▇▅90.4731.70943.77668.62240.88221.2734.89854.11952.2696.95317.26642.36444.43-9.5783.65224.63349.096-18.6927.99511.4712.668-23.4175.7174.81440.849-11.72738.543-61.62947.07814.5338.9654.13235.31315.4822.44318.66736.4950.1348.37656.02944.1136.16337.14463.21166.98517.137
us-gaap:IncomeTaxExpenseBenefit ▇▇▆▇▇▆▇▇▇▆▆▇▇▆▁▇▇▆▇▇▆▆▆██▆▇█▇▆▇▇▇▆▃▆▇▇▇▇▇▇▇▇▇▆23.3959.9734.44413.71211.8599.69810.74717.7516.0255.9770.83511.27513.6833.053-80.54212.57523.2162.70120.70821.7258.702-2.5465.14234.58630.454-4.63811.16631.70818.4065.5712.15918.77112.4114.978-39.4316.30813.06418.11510.14318.89614.95413.43313.81524.38411.4687.089
us-gaap:IncomeTaxesPaidNet ▇▄█▅▃▃▃▄▅▃▄▃▅▃▄▃▄▄▃▄▅▄▆▇▄▃▆▄▄▄▁▃▄▄▄▃▃▃▅▄▅▄▅▇▄▄28.923.59938.92812.7170.5070.9713.23811.111.730.9673.9651.95312.1191.9994.3610.9147.8885.5192.0593.32418.0245.84820.69429.2086.858-3.7920.2857.4338.9155.389-16.5481.1113.6133.6627.6011.3593.1691.0513.648.5418.2718.27416.20228.9686.0944.751
us-gaap:InterestIncomeExpenseNet ▁█-18.051-17.918NANA-18.654-18.787NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:InterestIncomeExpenseNet us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:StatementEquityComponents us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:AccumulatedGainLossNetCashFlowHedgeParentNANANA-2.468-2.13NANA-0.614NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InterestIncomeExpenseNonoperatingNet ▇▇▆█▅▅▅▃▂▃▂▃▁▂-18.051-17.918-18.272-17.407-18.654-18.787-18.989-19.702-20.215-19.764-20.139-19.916-20.769-20.27NA-20.675-22.492-22.576NA-21.565-21.647-18.98NA-19.017-19.249-19.438NA-19.494-19.382NANANANANANANANANANANANANANANANANA
us-gaap:InterestPaidNet ▂▇▂▇▃█▃▄█▃█▅▇▄▇▅█▆▆▆▆▆▄▆▄▆▅▆▄▆▅▆▄▆▁▅▁▆▁▅▁▃▁▄▁▄6.65727.5076.53527.6737.67930.6488.41213.07130.6578.71230.85917.56726.06914.67625.62417.11828.71521.71722.40821.98622.46721.80815.31321.20215.74421.66716.96221.37615.63421.43617.54321.24315.11621.7250.64119.3641.00120.8111.03218.6180.76210.7890.75512.6581.38812.184
us-gaap:NetIncomeLoss ▇▄▅▆▄▃▄▅▅▂▄▄▄▂█▃▄▁67.07521.73639.33254.9129.02311.57224.15136.36936.2440.97616.43131.08930.747-12.63184.19412.05825.88-21.393NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingIncomeLoss █▅▆▇▆▅▅▇▆▄▅▆▆▃▄▅▅▃▄▄▅▃▄▇▆▃▆▁▆▄▆▆▅▅▅▆▅▆▆▆▅▅▅▆▆▄110.00150.85561.74183.87960.2245.49652.30780.36773.04823.73441.48565.74564.35310.99127.93547.66346.7445.43321.94316.80234.504-4.08725.54993.9760.7587.30257.537-42.74867.11529.90658.87773.60853.24334.82836.23156.73947.53361.70159.24766.79251.88439.74242.99873.37271.92323.619
us-gaap:OtherNonoperatingIncomeExpense ▃▃▄▅▃▂▄▃▃▅▁▃▄▃▁▃▃▃█▃▃▃▃▃▃▄▄▄▃▆▃▃▅▄▃▄▄▃▄▄▅▅▄▃▅▄-1.48-1.2280.3072.268-0.5-2.3650.905-0.427-0.5642.983-4.061-0.9960.846-0.299-3.305-0.432-0.833-1.5496.932-0.198-0.189-0.35-0.99-0.139-0.660.4090.2440.613-0.6554.178-0.325-0.151.6550.525-0.337-0.091-0.075-0.2990.4710.1642.8682.8990.31-0.6692.7080.446
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax █▆▆▆▅▇▇▇▇▆▇▇▇▆▆▆▆▅▅▆▅▄▅▇█▆▇▇▇▇▇█▇▇▃▃▃▄▃▃▂▂▂▃▂▁926.458808.148796.19779.344710.0858.563871.005891.668868.678780.839858.204843.181849.14749.778747.403755.846752.788688.941692.113729.52697.51636.083713.044893.366936.228732.499845.024851.465858.48846.667879.43907.535860.528862.163558.962533.806523.118572.022545.886556.053447.235434.962417.058487.651471.639354.896
us-gaap:Revenues █▆▆▆▅▇▇▇▇▆▇▇▇▆▆▆▆▅▅▆▅▄▅▇█▆▇▇▇▇▇█▇▇▃▃▃▄▃▃▂▂▂▃▂▁926.458808.148796.19779.344710.0858.563871.005891.668868.678780.839858.204843.181849.14749.778747.403755.846752.788688.941692.113729.52697.51636.083713.044893.366936.228732.499845.024851.465858.48846.667879.43907.535860.528862.163558.962533.806523.118572.022545.886556.053447.235434.962417.058487.651471.639354.896
us-gaap:SellingGeneralAndAdministrativeExpense ▇▇▆▅▅▇▇▇▇▆█▇▇▆▆▆▆▆▅▆▅▅▄▄▆▆▅▅▆▆▅▆▇▇▃▂▃▃▃▂▂▂▂▂▁▁124.106121.641111.354106.544103.839129.307123.021122.301123.92114.812141.445121.219125.995115.088118.881113.252112.294112.22199.514110.954107.063104.48492.91893.113120.418107.715103.52799.701115.731118.962104.931114.464122.612128.4775.62860.33966.79470.75975.38565.70458.25454.79455.9853.61950.72945.484
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:Assets ████▇██▇▇▇▇▇▇▆▇▇▇▆▆▇▆▆▆▆▇▆▇▇▇▇▇▇▇▇▇▃▂▂▂▂▂▂▁4275.8794152.5394131.524106.1874077.6294132.0214108.9044021.8623955.3213882.0543738.3213774.3293715.4613684.8163706.573748.3533806.2823645.6533681.923712.6133692.3813641.6753431.4283599.8613746.6373546.0423704.2783761.2173932.4433863.9553953.6783956.8523832.1133803.3783825.8062449.4032122.2142092.8952085.8032010.3851965.081880.6441602.475NANANA
us-gaap:LiabilitiesAndStockholdersEquity ████▇██▇▇▇▇▇▇▆▇▇▇▆▆▇▆▆▆▆▇▆▇▇▇▇▇▇▇▇▇▃▂▂▂▂▂▂▁4275.8794152.5394131.524106.1874077.6294132.0214108.9044021.8623955.3213882.0543738.3213774.3293715.4613684.8163706.573748.3533806.2823645.6533681.923712.6133692.3813641.6753431.4283599.8613746.6373546.0423704.2783761.2173932.4433863.9553953.6783956.8523832.1133803.3783825.8062449.4032122.2142092.8952085.8032010.3851965.081880.6441602.475NANANA
us-gaap:StockholdersEquity █▆▆▅▄▃▄▃▃▂▂▂▁▁▂1409.5871348.451341.5511304.7151253.9711205.8051269.8131235.7951209.4671171.9651169.7561197.3241161.0481145.5261188.202NANANA1084.241NANANA1096.282NANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AssetsCurrent █▇▇▇▆▇▆▅▄▄▄▄▄▃▄▄▅▃▄▃▄▃▂▃▄▃▄▄▄▄▄▄▄▃▄▄▂▂▂▂▂▃▁1677.3161542.3511525.7221493.6591431.8041486.4761400.9081300.5841213.1861148.1221202.1581176.8211136.4821079.8221154.0561160.2581234.7341061.7711092.8711049.9311119.1341063.621921.1961072.5551163.3171043.1851126.4331153.9371150.2911114.5581171.1791141.7741105.1911073.5821086.7931109.288865.508881.885891.868826.27866.372997.876752.537NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue NANANA475.706447.366NA371.991NANANA226.507215.497197.068186.352319.399361.658446.366297.366306.997257.857352.923355.345184.708179.191173.621233.739246.879258.021278.644249.007310.073248.635263.478222.104229.836523.614296.758241.527260.723257.159377.576531.763302.21280.916295.3206.604
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents █▆▇▆▆▅▄▃▂▁▂▂▁▁▃595.574496.383519.101475.706447.366432.205371.991282.233204.455167.371226.507215.497197.068186.352319.399NANANA306.997NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:MarketableSecuritiesCurrent ▇█▄▅▅▆▂▃▄▅▄▁▁▁▁70.68374.3251.85756.63959.32662.14342.42146.87755.19857.47752.85637.3836.86237.79238.179NANANA0.0NANANANANANANA0.0NANANA12.43511.78710.33910.90511.77811.1139.7014.9970.1110.0930.1284.1433.174NANANA
us-gaap:AccountsReceivableNetCurrent ▇▇▇▆▆▇▇▇▇▇▆▆▆▅▅▅▅▄▄▅▄▃▄▆█▅▅▆▆▆▆▆▅▆▅▂▂▄▃▃▁▁▁659.364620.184611.534602.069572.373658.482644.738641.667632.888613.507606.952608.645590.58551.841528.924531.696512.375480.044496.226512.376503.749458.301496.004600.283684.875521.563557.131575.575575.187566.394579.394603.054549.909563.691541.423399.362397.453463.431449.553414.079352.809347.532332.678NANANA
us-gaap:InventoryNet ▁▇█215.725219.499220.498NANANA214.744NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent ██▆▅▇▃▄▂▃▃▃▁▁▂▁▁▂▅▅▂▄▃▃▃▅76.52476.72667.05158.71169.45544.62948.94238.19942.6445.92542.835.44134.83438.17735.17532.63735.82355.1856.11640.89849.67844.05646.26544.8860.88NA57.435NANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AmortizationOfIntangibleAssets ▁▁▂▅▃▄▃▃▃▅▃▂▃▄▅▄▅▄▅█▆▅▇▆▃█▄▄▄▅▄▃▃7.87.68.29.68.89.28.68.48.79.58.48.18.69.29.38.99.79.19.710.89.99.610.59.98.811.09.29.18.99.59.28.88.8NA5.44.43.53.93.73.22.92.92.92.8NANA
us-gaap:PropertyPlantAndEquipmentNet NANANA1539.3331553.8081547.1191588.1511593.9931596.9171588.6131561.9781614.4291609.3821631.6481587.3651611.9711602.4531609.491611.81648.5711594.9871596.8721532.4671531.5481562.2541502.4971558.8341579.7011611.2981588.2861602.171615.4271554.9721549.8061531.7631003.414955.04918.684903.947880.719848.276683.284655.394NANANA
 us-gaap:PropertyPlantAndEquipmentNet us-gaap:ConsolidationItems us-gaap:CorporateNonSegmentNANANA89.89390.58585.03393.48991.37981.02673.61256.891NANANA78.064NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentNet us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,clh:EnvironmentalServicesNANANA890.262904.626909.207939.352946.367956.381953.96951.867NANANA927.139NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentNet us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,clh:SafetyKleenNANANA559.178558.597552.879555.31556.247559.51561.041553.22NANANA582.162NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:Goodwill ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆▆▆▆▆▆▆▆▆▆▆▆▆▆███████▂▂▂▂▂▁▁▁544.639543.605527.023524.261523.154519.627525.013524.581525.044517.91514.189514.102497.251492.705478.523478.728472.819469.86465.154470.633461.491460.642453.105447.918452.858445.412452.669449.577578.974565.062570.96590.152575.275572.406593.771157.724135.962125.723122.392134.69688.51161.78660.252NANANA
 us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass us-gaap:TrademarksNANA123.156NANANA122.934NANANA122.468123.928122.84123.031123.328124.159122.972122.715122.623122.855122.943122.958122.326123.08122.765122.618123.564124.002124.597124.16124.638115.505NANA115.52NANANANANANANANANANANA
 us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass us-gaap:TrademarksAndTradeNames█▇▆▄▃▁▅▄▅▄▃123.45123.281123.156122.667122.463122.097122.934122.76122.876122.623122.468NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▅▅▅▅▅▅▆▆▆▆▆▆▆▆▆▇▇▇▇▇▇▇▇▇▇▇▇████████▂▁▁▁▁▁▁▁374.23380.053386.62392.401400.448406.881419.066425.863433.853438.958441.875451.355455.92464.635469.1477.639482.828490.952498.7507.337492.224502.532506.818518.995534.621520.045530.08541.874553.658557.211569.973567.776555.422566.91572.817151.81138.622138.967139.644140.97127.068113.65114.4NANANA
us-gaap:FiniteLivedIntangibleAssetsNet ▁▁▁▂▂▂▃▃▃▃▃▄▄▄▄▄▅▅▅▆▅▅▆▆▆▆▆▇▇▇██▇██250.78256.772263.464269.734277.985284.784296.132303.103310.977316.335319.407327.427333.08341.604345.8353.48359.856368.237376.098384.482369.281379.574384.492395.915411.856397.427406.516417.872429.061433.051445.335452.271439.926451.398457.297NANANANANANANANANANANA
us-gaap:IntangibleAssetsNetIncludingGoodwill ▂▃▁▁▃▃▆▇███918.869923.658913.643916.662923.602926.508944.079950.444958.897956.868956.064NANANA947.651NANANA963.875NANANA959.923NANANA982.749NANANA1140.933NANANA1169.759NANANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset ▁▂▄▃▄▆▆▆█▇135.363142.006150.341146.454153.522160.526162.206164.302173.504170.55NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▃▄▄▂▃▂▃▃▃▄▄▄▄▃▄▄▃▃▃█▅▄▃▃▄▄▄▄▄▄▄▃▃▃▃▂▂▂▂▂▃▁▁13.04216.5816.51610.07914.89311.39213.5612.53912.81717.90118.12117.62216.42616.00617.49819.75713.44813.5813.34734.94423.13316.38115.99513.72417.64618.14218.68217.72518.93818.80218.53615.80614.49113.08114.65110.31110.60410.51910.19.16614.4815.7286.687NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AccountsPayableCurrent ▄▃▃▃▃▅▆▅▅▄▅▄▄▄▄▄▄▄▄▄▄▃▄▆█▄▅▅▅▆▇▇▅▅▅▂▂▂▂▃▂▁▁249.206213.355195.878213.776188.34267.892298.375277.545253.177242.26276.461248.405247.821237.953224.231223.599224.218218.676229.534226.776222.302188.834241.183295.476365.088244.216267.329251.832262.553284.768316.462321.097273.058263.564256.468174.327172.657172.551178.084201.561156.106135.998136.978NANANA
us-gaap:AccruedLiabilitiesCurrent █▇▇▇▇▆▇▆▅▅▅▅▄▄▄▅▄▄▄▅▅▄▄▆▆▄▅▆▆▅▆▆▆▅▅▂▂▂▃▂▂▁▂311.656284.212295.823293.2289.414255.513276.54253.455224.497208.386233.405229.932200.135194.16187.982213.189191.495183.957190.721226.08203.813191.592193.66244.79241.098187.728219.549260.123245.368213.096236.829256.813242.362212.424232.429136.687130.526114.501147.992138.911118.71695.847116.089NANANA
us-gaap:ContractWithCustomerLiabilityCurrent ██▅▃▁▄▅▅▅▃▁▂▃83.73383.16574.06667.41261.90271.24373.3773.15775.1767.55761.84365.17268.705NA67.822NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesCurrent █▇▇▇▆▇█▇▇▆▆▆▅▅▅▅▆▄▅▅▅▄▅▆█▅▆▆▆▆▇▇▆▆▆▂▂▂▃▃▂▁▁711.069650.553636.145641.061604.94658.412720.1680.042633.69597.51602.278576.3543.668524.684503.817529.54619.3488.581504.668539.096520.421465.51517.12625.016697.194519.861572.471608.87606.266587.318639.545669.532604.187564.045569.052365.563361.321342.227381.742393.568325.43282.32306.284NANANA
us-gaap:LongTermDebtCurrent ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█7.5357.5357.5357.5357.5357.5357.5357.5357.5357.5357.5357.5354.04.04.04.0107.798NA0.0NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseLiabilityCurrent ▁▁▃▃▄▆▇▇█35.07435.3936.7536.81438.6239.99840.97941.36442.564NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAccruedLiabilitiesCurrent ▆▅▅▄▄█▆▅▅▄▄▂▂▂▂▂▂▂▂▂▂▂▃▃▃▃▃▄▄▃▅▅▄▄▄▂▁▁▂▂▁66.78760.96757.70253.92655.65789.20272.7263.53458.52952.25955.70736.59635.55234.86434.24233.01635.0434.66136.438.02635.05537.93644.5245.13342.17543.88842.78850.15252.86347.37858.26557.87756.77754.6656.438.23128.29928.88537.49937.65124.701NA22.28NANANA
us-gaap:TaxesPayableCurrent ▂▃▂▅▅▄▃▄▄▃▂▃▂▃▂▅▄▃▃▆▄▃▃█▇▃▄▇▅▃▄▅▄▃▃▂▁▁▁▂▁25.61630.80425.84354.67754.66741.75135.74940.30640.23630.28925.6737.30727.11628.80327.3349.89237.47429.81435.08360.0239.62336.10337.09577.83764.63329.87238.29767.046.83835.5138.93854.40344.30732.45435.6424.56817.25218.30214.86324.63716.776NA19.529NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:LiabilitiesNoncurrent ██████▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆▆▆▆▆▆▆▆▆▆▆▆▆▃▂▂▂▂▂▂▁2155.2232153.5362153.8242160.4112218.7182267.8042118.9912106.0252112.1642112.5791966.2872000.7052010.7452014.6062014.5512090.4662086.0452093.4422093.0112072.5722055.6172059.5921818.0261852.1241876.0071863.3321868.9361831.7961827.4611831.0021838.4941811.21813.2061815.8651824.6821077.085799.993799.39803.074776.611782.282776.454515.364NANANA
us-gaap:LongTermDebtNoncurrent ▇▇▇▇██▇▇▇▇▇███████████▆▇▇▇▇▇▇▇▇▇▇▇▇▄▂▂▂▂▂▂▁1547.3981548.5171549.6411550.7561626.8711702.9921554.1161555.2571562.9891564.0051565.0211616.1561624.7271625.2591625.5371625.9711626.5051633.9681633.2721632.5771631.8811631.6031382.5431395.01395.01395.01395.01395.01395.01400.01400.01400.01400.01400.01400.0800.0523.481523.833524.203524.59524.994525.416264.007NANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet ▁█▇228.718230.236230.097NANANA231.337NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent █▄▁95.64788.77283.182NANANA45.995NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseLiabilityNoncurrent ▁▂▄▃▄▆▆▆█101.377107.554114.258110.097115.089120.649121.02122.668130.704NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA37.629NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA29.014NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA21.048NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA14.672NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA25.064NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:StockholdersEquity █▆▆▅▄▃▄▃▃▂▂▂▁▁▂1409.5871348.451341.5511304.7151253.9711205.8051269.8131235.7951209.4671171.9651169.7561197.3241161.0481145.5261188.202NANANA1084.241NANANA1096.282NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CommonStockValue ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇███████████▇▆▆▆▆▆▁▁0.5440.5460.5480.5520.5560.5560.5580.5580.5590.5580.5580.560.5610.5620.5650.5690.5720.5720.5730.5740.5750.5760.5760.5770.5840.5870.5890.60.6060.6070.6070.6060.6060.6050.6040.5340.5330.5330.5320.530.530.2640.264NANANA
us-gaap:AdditionalPaidInCapitalCommonStock ▂▂▃▃▃▃▄▄▄▄▄▄▄▄▄▅▅▅▅▅▅▅▅▅▆▆▆▇███████▁▁▁▁▁▁▁▁539.39555.966582.749613.208629.755628.14644.412648.184648.805652.624655.415661.546664.948675.23686.962708.358716.712720.383725.67726.878730.709733.726738.401740.07777.465789.501805.029853.35889.08900.726898.165893.822889.588885.733880.979508.182504.667501.014497.919499.086495.237492.264488.648NANANA
us-gaap:RetainedEarningsAccumulatedDeficit █▇▇▇▆▆▆▆▆▅▅▅▅▅▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▃▃▃▃▃▂▂▂▁▁▁1058.542991.467969.731930.399875.489846.466834.894810.743774.374738.13737.154720.723689.634658.887673.082588.888576.83550.95572.793585.506595.761591.795612.666612.098571.87561.475568.564541.187634.524605.852596.892570.091534.73511.828501.326439.452427.093403.667371.652333.419296.286267.13244.4NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▃▂▂▂▁▁▂▂▂▂▂▃▃▃▃▃▃▂▂▂▂▂▁▂▃▃▄▅▆▅▆▇▆▇██▇█▇▇███-188.889-199.529-211.477-239.444-251.829-269.357-210.051-223.69-214.271-219.347-223.371-185.505-194.095-189.153-172.407-169.468-193.177-208.275-214.326-211.544-210.233-209.055-254.892-229.555-176.014-188.245-110.842-74.117-25.025-61.081-19.55612.07-9.73525.77149.63259.05629.07646.53331.35312.22270.36667.2450.759NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities █▆▆▇▇▃▇▇▆▃▇▆▅▃▄▆▄▄▅▄▅▃▅▆▆▅▅▅▆▂▇▇▅▃▅▄▇▃▂▄▄▂▄▄▆▁162.432103.0113.165143.946139.80533.681128.517146.205108.7329.74125.995117.54577.76751.90364.229104.53859.81257.11980.79758.77680.76239.28986.79115.778109.03884.777101.32781.095110.3484.596135.725142.50298.02339.58991.67356.918146.22129.55328.19575.70760.77314.85670.17856.613105.524-8.207
us-gaap:NetCashProvidedByUsedInInvestingActivities █████████████▇█████▇█▇██▇██████▇██▁▇███▇▇█████-45.603-86.737-39.164-18.611-48.598-93.087-30.747-47.241-64.899-74.969-50.177-83.341-51.713-164.428-81.841-71.0561.498-51.868-27.938-152.418-71.408-110.013-80.14-66.305-150.837-53.36-67.598-59.402-68.96-62.334-77.745-126.326-69.191-72.25-1346.219-97.943-92.714-35.76-34.571-178.441-231.981-35.188-53.578-41.481-14.318-16.31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▂▂▂▁▁▃▂▂▂▂▁▂▂▂▂▁▂▂▂▂▂▃▂▂▂▂▂▂▂▂▂▂▂▂█▃▂▂▂▂▂▃▂▂▂▂-19.914-40.62-36.971-98.992-79.43126.447-9.293-20.339-8.425-15.368-60.583-16.486-14.273-19.655-23.589-119.87386.138-15.436-2.574-2.353-11.632236.7942.886-36.893-18.978-37.194-40.868-38.185-14.558-0.3343.448-30.34114.38525.634961.779266.3433.545-13.79910.884-17.68516.955248.5862.672-31.523-0.296-3.083
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect █▃▆▅▄▆█▇▅▁▄▄99.191-22.71843.39528.3415.16160.21489.75877.77837.084-59.13611.0118.429NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:DeferredIncomeTaxExpenseBenefit █▁1.951-0.039NANANANA8.9780.663-1.6360.019.0280.071-0.005-0.005-83.519-0.006-0.0060.19644.01-22.305-6.5280.00720.924-18.086-0.005-0.90323.8148.507-0.0010.030.8470.28-0.040.03234.6570.016-0.241-0.26938.033-1.0160.3330.4864.3790.1520.615-0.227
us-gaap:DepreciationDepletionAndAmortization ▇▇▇█▇██▇███▇▇█▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆▄▃▃▃▃▃▂▁▁▁▁▁71.59272.16371.41874.4772.49474.53377.39773.75674.21775.35577.93973.08272.7674.84471.4972.98971.53172.41271.34773.3673.39368.90269.00569.0667.77368.35670.60370.04966.07569.35667.54569.4367.46860.00644.85241.338.66336.83135.66334.60426.93625.4624.80222.89222.10522.674
us-gaap:IncreaseDecreaseInAccountsPayable ▅▅▃▅▁▄▄▅▄▃▅▄▄▄▄▄▄▃▄▄▅▃▂▂█▄▄▄▃▃▄▇▃▃▅▄▃▄▂▆▃▄▄▄▆▄27.70122.179-16.4318.236-76.965-5.1694.11823.957.041-27.95624.874-1.56413.8919.714-3.599-4.39910.923-13.6098.448-3.55427.798-36.195-63.35-61.588106.0162.6231.326-6.931-23.047-23.374-0.1470.683-17.314-16.11224.899-2.065-12.602-4.302-38.35763.265-26.148-6.876-9.275-0.58353.092-4.681
us-gaap:IncreaseDecreaseInAccountsReceivable ▅▄▄▅▂▅▄▄▅▄▄▄▅▄▄▄▅▃▄▅▅▃▁▂█▃▃▅▄▄▄▅▄▅▄▄▂▄▅▅▃▄▄▄▅▄41.5829.7031.54743.571-92.524.961.86318.12425.37-12.0863.31413.48547.99514.769-4.3586.96855.455-24.301-17.93533.93734.846-35.839-118.493-69.809160.096-27.065-21.36635.0194.43-3.741-18.64251.594-7.94328.7265.508-5.764-67.07212.95532.5450.733-28.40410.341-14.3032.4241.13620.158
us-gaap:IncreaseDecreaseInInventories ▅▆▅▆▆▇▆▇▆▆▇▆█▇▅▅▆▆▆█▅▆▆▆▆▁▆█▇▆▆▅█▃▆▇▅▆-1.5120.747-1.6210.532.07.0243.8877.8533.2970.8326.4241.90913.05.6250.027-1.3323.6312.6762.35812.609-1.7692.8820.6492.9864.437-22.1310.66411.1197.8471.7092.854-0.58212.445-13.5735.1796.1520.0871.453NANANANANANANANA
us-gaap:NetCashProvidedByUsedInOperatingActivities █▆▆▇▇▃▇▇▆▃▇▆▅▃▄▆▄▄▅▄▅▃▅▆▆▅▅▅▆▂▇▇▅▃▅▄▇▃▂▄▄▂▄▄▆▁162.432103.0113.165143.946139.80533.681128.517146.205108.7329.74125.995117.54577.76751.90364.229104.53859.81257.11980.79758.77680.76239.28986.79115.778109.03884.777101.32781.095110.3484.596135.725142.50298.02339.58991.67356.918146.22129.55328.19575.70760.77314.85670.17856.613105.524-8.207
us-gaap:NetIncomeLoss ▇▄▅▆▄▃▄▅▅▂▄▄▄▂█▃▄▁67.07521.73639.33254.9129.02311.57224.15136.36936.2440.97616.43131.08930.747-12.63184.19412.05825.88-21.393NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ShareBasedCompensation ▄▄▇█▄▄▄▆▅▇▇▅▅▄▅▅▄▃▄▄▄▃▃▁▅▃▃▃▃▃▃▃▃▃▃▂▂▃▄▃▂▂▃▃▃▁3.3053.485.7636.6622.7863.2913.1525.0213.8345.8096.0664.0873.5623.0773.9344.042.9012.2712.7462.9962.6462.0932.00.4044.2961.852.3542.1062.0622.2782.5572.4652.0371.8872.2591.6191.4752.1412.8352.4491.1361.7441.9992.1132.3160.791
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities █████████████▇█████▇█▇██▇██████▇██▁▇███▇▇█████-45.603-86.737-39.164-18.611-48.598-93.087-30.747-47.241-64.899-74.969-50.177-83.341-51.713-164.428-81.841-71.0561.498-51.868-27.938-152.418-71.408-110.013-80.14-66.305-150.837-53.36-67.598-59.402-68.96-62.334-77.745-126.326-69.191-72.25-1346.219-97.943-92.714-35.76-34.571-178.441-231.981-35.188-53.578-41.481-14.318-16.31
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▅▄▄▂▄█▄▅▆▅▄▅▅▄▃▃▄▄▄▅▄▇▆▆▇▅▅▆▆▇▇▆▇▇▆▄▅▂▃▄▃▃▄▃▁▁50.07541.91345.89924.63642.95482.76741.79156.16159.42558.94742.62256.58349.89744.24239.27138.99446.2842.46244.03651.81947.74875.78167.19765.85471.19652.94958.73660.69163.18175.00572.56666.17569.21772.24967.07147.35555.3127.66134.86948.18431.34534.11541.70939.25118.93816.552
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▂▂▂▁▁▃▂▂▂▂▁▂▂▂▂▁▂▂▂▂▂▃▂▂▂▂▂▂▂▂▂▂▂▂█▃▂▂▂▂▂▃▂▂▂▂-19.914-40.62-36.971-98.992-79.43126.447-9.293-20.339-8.425-15.368-60.583-16.486-14.273-19.655-23.589-119.87386.138-15.436-2.574-2.353-11.632236.7942.886-36.893-18.978-37.194-40.868-38.185-14.558-0.3343.448-30.34114.38525.634961.779266.3433.545-13.79910.884-17.68516.955248.5862.672-31.523-0.296-3.083
us-gaap:RepaymentsOfLongTermDebt ▄▄1.8841.884NANA1.8841.884NANANANANANANANANANANANANANANANA0.00.0NANA0.00.0NANA0.00.0NANA0.0NANANA0.0NANANANANANANA
us-gaap:PaymentsForRepurchaseOfCommonStock ▃▄▅▄▁▃▂▂▂▂▂▂▃▃▄▃▂▂▂▂▂▂▂▆▃▃█▅▃▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁18.86326.54635.30222.2010.017.3415.05.1184.9486.32411.4997.09912.21814.26424.50612.2085.4616.7966.3195.7355.1364.9984.19236.95216.82415.37956.01233.67213.4321.2250.7310.00.00.01.3080.3881.2160.02.1640.090.0231.7840.2010.0850.0980.015
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:LongtermDebtType clh:SeniorUnsecuredNotesdue2027,us-gaap:UnsecuredDebtNANA4.875e-06NA4.875e-084.875e-084.875e-084.875e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:LongtermDebtType clh:SeniorUnsecuredNotesdue2029,us-gaap:UnsecuredDebtNANA5.125e-06NA5.125e-085.125e-085.125e-085.125e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value544000.0546000.0548000.0552000.0556000.0556000.0558000.0558000.0559000.0558000.0558000.0560000.0561000.0562000.0565000.0569000.0572000.0572000.0573000.0574000.0575000.0576000.0576000.0577000.0584000.0587000.0589000.0600000.0606000.0607000.0607000.0606000.0606000.0605000.0604000.0534000.0533000.0533000.0532000.0530000.0530000.0264000.0264000.0262000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Shares Issued

us-gaap:SharesIssued us-gaap:StatementEquityComponents

us-gaap:SharesIssued

us-gaap:CommonStock


Shares
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value54545455555555555555555556565656575757575757575758585859606060606060605353535353522626262320
Percentage of SharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value5455555556565656565656575757575757585858606060606060535353535326525226
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value5454555555555555565656575757575757585858606060606060535353535226525226
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

clh:PerformanceStockAwards


Antidilutive
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302016-06-302015-09-302015-06-30
Value0.0342190.2358060.0960180.1217260.1470750.0757590.3481970.2742570.19618
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0

clh:RestrictedStockAwardsAndPerformanceAwards


Antidilutive
Period End2021-06-302020-06-30
Value0.00050.14946
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount0.0155.7

us-gaap:RestrictedStock


Antidilutive
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302016-06-302015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-30
Value0.0060.0161830.149460.0099250.0035670.0046230.0095370.0107040.0110750.5399830.6241450.005270.1010590.173
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount17.56.9155.78.22.46.12.73.95.60.00.00.00.00.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.230.40.710.990.520.210.430.650.650.020.290.550.55-0.221.480.210.45-0.37-0.22-0.180.07-0.360.010.690.18-0.120.46-1.550.470.150.440.580.380.171.110.230.440.60.720.70.550.860.440.741.10.4
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.220.390.710.990.520.210.430.650.650.020.290.550.54-0.221.480.210.45-0.37-0.22-0.180.07-0.360.010.690.18-0.120.46-1.550.470.150.440.580.380.171.110.230.440.60.720.70.550.860.440.731.10.4
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value3.33.55.86.72.83.33.15.03.85.86.14.13.53.13.94.02.92.32.83.02.62.12.00.54.31.82.42.12.02.3
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.40.00.90.40.40.40.60.40.70.70.50.40.40.50.50.40.30.40.40.40.30.30.10.50.20.30.20.20.3

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value7733676746-47.7343726415.0-21.4353925-29.377813540-15.342-15.495-11.5662.7882412029-17.45715146-58.1443.12616
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.44.20.08.66.6-5.64.33.04.80.6-2.54.73.0-3.910.94.75.4-2.2-2.2-1.60.43.921.55.6-3.32.726.8-10.50.73.8

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value617560548511470606615612594564594580583546526519519496496491480464522634652546610598606625645647614636399372367400
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax66.769.40.065.666.370.770.768.768.572.369.368.968.772.970.568.769.172.171.867.468.873.073.371.069.774.672.370.370.773.973.471.371.473.871.569.970.370.0

us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService

us-gaap:Product


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
Value12511094825911311011611410011811611098100107107
Percentage of CostOfGoodsAndServicesSold20.319.717.216.212.718.817.919.119.317.919.920.018.918.119.120.620.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.513.60.010.68.413.312.713.113.212.913.813.813.013.213.514.214.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Product65.375.80.084.682.682.20.076.974.781.20.073.572.375.90.074.775.7

us-gaap:Service


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
Value492450454428411492505496480463476464473447425412412
Percentage of CostOfGoodsAndServicesSold79.780.382.883.887.381.282.180.980.782.180.180.081.181.980.979.479.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax53.255.70.055.057.957.458.055.655.359.455.555.155.859.757.054.654.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Service67.168.00.062.964.468.40.067.067.270.60.067.867.972.20.067.367.5

Cost Of Revenue

us-gaap:CostOfRevenue

us-gaap:CostOfRevenue


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value617560548511470606615612594564594580583546526519519496496491480464522634652546610598606625645647614636399372367400
Percentage of CostOfRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax66.769.40.065.666.370.770.768.768.572.369.368.968.772.970.568.769.172.171.867.468.873.073.371.069.774.672.370.370.773.973.471.371.473.871.569.970.370.0

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value9031436840213454526.953174244-9.5783.6522449-18.6927.9951112-23.4175.717440-11.72738-61.629471438543515221836504856443637636617
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.83.90.08.85.82.54.06.16.00.92.05.05.2-1.30.53.36.5-2.71.21.61.8-3.70.88.44.4-1.64.6-7.25.51.74.46.04.11.84.03.57.08.88.910.19.98.38.913.014.24.8

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value239.9734.44413119.6981017165.9770.83511133.053-80.54212232.70120218.702-2.5465.1423430-4.6381131185.571218124.978-39.4316.3081318101814131324117.089
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.51.20.01.81.71.11.22.01.80.80.11.31.60.4-10.81.73.10.43.03.01.2-0.40.73.93.3-0.61.33.72.10.71.42.11.40.6-7.11.22.53.21.93.43.33.13.35.02.42.0

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value283.59938120.5070.9713.23811110.9673.9651.953121.9994.3610.9147.8885.5192.0593.324185.84820296.858-3.79207.4338.9155.389-16.5481.1113.6133.6627.6011.3593.1691.05138.54188.27416286.0944.751
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.10.40.01.60.10.10.41.21.40.10.50.21.40.30.60.11.00.80.30.52.60.92.93.30.7-0.52.40.91.00.6-1.90.10.40.41.40.30.60.22.51.54.11.93.95.91.31.3

Interest Income Expense Net

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestIncomeExpenseNet


Interest
Period End2021-06-302021-03-312020-06-302020-03-31
Value-18051000.0-17918000.0-18654000.0-18787000.0
Percentage of InterestIncomeExpenseNet100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.9-2.2-2.6-2.2

us-gaap:InterestIncomeExpenseNet us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Interest
Period End2020-09-302020-06-302019-09-30
Value-2468000.0-2130000.0-614000.0
Percentage of InterestIncomeExpenseNet0.011.40.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.3-0.3-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.0

Interest Income Expense Nonoperating Net

us-gaap:InterestIncomeExpenseNonoperatingNet

us-gaap:InterestIncomeExpenseNonoperatingNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-30
Value-18051000.0-17918000.0-18272000.0-17407000.0-18654000.0-18787000.0-18989000.0-19702000.0-20215000.0-19764000.0-20139000.0-19916000.0-20769000.0-20270000.0-20675000.0-22492000.0-22576000.0-21565000.0-21647000.0-18980000.0-19017000.0-19249000.0-19438000.0-19494000.0-19382000.0
Percentage of InterestIncomeExpenseNonoperatingNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.9-2.20.0-2.2-2.6-2.2-2.2-2.2-2.3-2.5-2.3-2.4-2.4-2.7-2.7-3.0-3.3-3.0-3.1-3.0-2.1-2.1-2.7-2.3-2.3

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value6.657276.535277.679308.41213308.7123017261425172821222122211521152116211521172115210.641191.001201.032180.762100.755121.38812
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.73.40.03.61.13.61.01.53.51.13.62.13.12.03.42.33.83.23.23.03.23.42.12.41.73.02.02.51.82.52.02.31.82.50.13.60.23.60.23.30.22.50.22.60.33.4

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value6721395429112436360.976163130-12.631841225-21.393
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.22.70.07.04.11.32.84.14.20.11.93.73.6-1.711.31.63.4-3.1

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value672154291136360.9763130-12.631
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.22.77.04.11.34.14.20.13.73.6-1.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value110506183604552807323416564102747465.433211634-4.0872593607.30257-42.748672958735334365647615966513942737123
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.96.30.010.88.55.36.09.08.43.04.87.87.61.53.76.36.20.83.22.34.9-0.63.610.56.51.06.8-5.07.83.56.78.16.24.06.510.69.110.810.912.011.69.110.315.015.26.7

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-1480000.0-1228000.0307000.02268000.0-500000.0-2365000.0905000.0-427000.0-564000.02983000.0-4061000.0-996000.0846000.0-299000.0-3305000.0-432000.0-833000.0-1549000.06932000.0-198000.0-189000.0-350000.0-990000.0-139000.0-660000.0409000.0244000.0613000.0-655000.04178000.0-325000.0-150000.01655000.0525000.0-337000.0-91000.0-75000.0-299000.0471000.0164000.02868000.02899000.0310000.0-669000.02708000.0446000.0
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.2-0.20.00.3-0.1-0.30.1-0.0-0.10.4-0.5-0.10.1-0.0-0.4-0.1-0.1-0.21.0-0.0-0.0-0.1-0.1-0.0-0.10.10.00.1-0.10.5-0.0-0.00.20.1-0.1-0.0-0.0-0.10.10.00.60.70.1-0.10.60.1

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value926808796779710858871891868780858843849749747755752688692729697636713893936732845851858846879907860862558533523572545556447434417487471354
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems

clh:OperatingSegmentsAndCorporateNonSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.0790.079-0.664-0.266-1.47-1.011-0.616-1.349-0.382-0.66-0.747-0.684
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.0-0.1-0.0-0.2-0.1-0.1-0.2-0.0-0.1-0.1-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.0-0.1-0.0-0.2-0.1-0.1-0.2-0.0-0.1-0.1-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax clh:OperatingSegmentsAndCorporateNonSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CorporateNonSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.0790.0790.0720.0720.0560.090.2110.1290.2020.594-0.0430.467
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.1-0.00.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.1-0.00.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MaterialReconcilingItems


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-0.736-0.338-1.526-1.101-0.827-1.478-0.584-1.254-0.704-1.151
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.1-0.0-0.2-0.1-0.1-0.2-0.1-0.2-0.1-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.1-0.0-0.2-0.1-0.1-0.2-0.1-0.2-0.1-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:MaterialReconcilingItems100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems, us-gaap:ProductOrService

us-gaap:CorporateNonSegment, clh:IndustrialServicesAndOther


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.0790.0790.0720.0720.0560.090.2110.1290.2020.594
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment clh:IndustrialServicesAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, clh:FieldandEmergencyResponse, clh:EnvironmentalServices


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value111115127105879586718177
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.014.917.912.310.010.710.09.29.59.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.014.917.912.310.010.710.09.29.59.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments clh:FieldandEmergencyResponse clh:EnvironmentalServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, clh:FieldandEmergencyResponse, clh:EnvironmentalServicesSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value106105127105
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.513.017.912.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.513.017.912.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments clh:FieldandEmergencyResponse clh:EnvironmentalServicesSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, clh:IndustrialServicesAndOther, clh:EnvironmentalServices


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value11312495146155162163150
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.316.013.417.117.918.218.819.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.316.013.417.117.918.218.819.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments clh:IndustrialServicesAndOther clh:EnvironmentalServices100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, clh:IndustrialServicesAndOther, clh:EnvironmentalServicesSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value15011995146
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.214.813.417.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.214.813.417.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments clh:IndustrialServicesAndOther clh:EnvironmentalServicesSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, clh:SafetlyKleenEnvironmentalServices, clh:EnvironmentalServicesSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value158155148176
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.219.320.920.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.219.320.920.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments clh:SafetlyKleenEnvironmentalServices clh:EnvironmentalServicesSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, clh:SafetlyKleenEnvironmentalServices, clh:SafetyKleen


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value196203194214210217216207200200
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax24.726.127.425.024.224.424.926.523.323.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax24.726.127.425.024.224.424.926.523.323.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments clh:SafetlyKleenEnvironmentalServices clh:SafetyKleen100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, clh:SafetlyKleenEnvironmentalServices, clh:SafetyKleenSustainabilitySolutionsSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value40384637
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.44.86.64.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.44.86.64.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments clh:SafetlyKleenEnvironmentalServices clh:SafetyKleenSustainabilitySolutionsSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, clh:SafetyKleenOil, clh:SafetyKleen


Revenue
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value775011512312599133
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.07.113.513.914.512.715.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.07.113.513.914.512.715.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments clh:SafetyKleenOil clh:SafetyKleen100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, clh:SafetyKleenOil, clh:SafetyKleenSustainabilitySolutionsSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value16211650115
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.614.47.113.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.614.47.113.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments clh:SafetyKleenOil clh:SafetyKleenSustainabilitySolutionsSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, clh:TechnicalServices, clh:EnvironmentalServices


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value287257241275299292275251279264
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.233.134.132.134.432.831.832.332.531.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.233.134.132.134.432.831.832.332.531.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments clh:TechnicalServices clh:EnvironmentalServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, clh:TechnicalServices, clh:EnvironmentalServicesSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value306272241275
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax33.133.734.132.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax33.133.734.132.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments clh:TechnicalServices clh:EnvironmentalServicesSegment100.0100.0100.0100.0

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

us-gaap:IntersegmentElimination, clh:EnvironmentalServices


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value31293137353536343433343130313132174-18.955-21.492-19.114-12.91-5.947-8.802-11.5821621232876173241
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.03.84.44.34.04.04.24.44.13.94.04.34.14.24.24.725.2-2.6-3.1-3.0-1.8-0.7-0.9-1.61.92.52.73.38.71.93.74.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.03.84.44.34.04.04.24.44.13.94.04.34.14.24.24.725.2-2.6-3.1-3.0-1.8-0.7-0.9-1.61.92.52.73.38.71.93.74.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination clh:EnvironmentalServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntersegmentElimination, clh:EnvironmentalServicesSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value0.951.724-0.1260.156
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.2-0.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.2-0.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination clh:EnvironmentalServicesSegment100.0100.0100.0100.0

us-gaap:IntersegmentElimination, clh:SafetyKleen


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-03-312014-12-312014-09-30
Value-31.884-29.448-31.171-37.163-35.022-35.274-36.206-34.075-34.826-33.022-34.291-31.965-30.357-31.757-31.639-32.069-28.684-28.716-29.092-9.407-55.803-23.744-18.25734-52.606
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.0-3.8-4.4-4.3-4.0-4.0-4.2-4.4-4.1-3.9-4.0-4.3-4.1-4.2-4.2-4.7-4.1-3.9-4.2-1.5-7.8-2.7-2.54.0-6.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.0-3.8-4.4-4.3-4.0-4.0-4.2-4.4-4.1-3.9-4.0-4.3-4.1-4.2-4.2-4.7-4.1-3.9-4.2-1.5-7.8-2.7-2.54.0-6.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination clh:SafetyKleen100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntersegmentElimination, clh:SafetyKleenSustainabilitySolutionsSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value-0.95-1.7240.126-0.156
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.1-0.20.0-0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.1-0.20.0-0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination clh:SafetyKleenSustainabilitySolutionsSegment100.0100.0100.0100.0

us-gaap:MaterialReconcilingItems, clh:EnvironmentalServices


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.7360.3391.3891.0950.8271.4760.5761.2490.7011.145
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.00.20.10.10.20.10.20.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.00.20.10.10.20.10.20.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:MaterialReconcilingItems clh:EnvironmentalServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MaterialReconcilingItems, clh:SafetyKleen


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.0-0.0010.1370.0060.00.0020.0080.0050.0030.006
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0-0.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0-0.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:MaterialReconcilingItems clh:SafetyKleen0.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, clh:EnvironmentalServices


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value51349846452854255056350967250855447247447248142812521751691601921651671499919219415229187198152
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax64.563.965.461.562.361.764.865.278.460.365.363.063.562.564.062.3181.024.124.325.326.918.617.820.411.722.622.718.03.320.623.117.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax64.563.965.461.562.361.764.865.278.460.365.363.063.562.564.062.3181.024.124.325.326.918.617.820.411.722.622.718.03.320.623.117.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments clh:EnvironmentalServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, clh:EnvironmentalServicesSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value723652612705
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax78.180.886.382.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax78.180.886.382.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments clh:EnvironmentalServicesSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, clh:SafetyKleen


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-03-312014-12-312014-09-30
Value28228124533032834130527218833329427727228327126026026824858708777882187
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax35.536.134.638.537.738.335.234.922.039.634.737.136.537.536.037.937.636.835.69.199.38.610.797.210.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax35.536.134.638.537.738.335.234.922.039.634.737.136.537.536.037.937.636.835.69.199.38.610.797.210.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments clh:SafetyKleen100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, clh:SafetyKleenSustainabilitySolutionsSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value20315597153
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.919.213.717.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.919.213.717.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments clh:SafetyKleenSustainabilitySolutionsSegment100.0100.0100.0100.0

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

us-gaap:CorporateNonSegment, country:CA


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.0980.2580.2160.3921.3280.3940.00.0-0.6830.533
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.20.00.00.0-0.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.20.00.00.0-0.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment country:CA100.0100.0100.0100.0100.0100.00.00.0100.0100.0

us-gaap:CorporateNonSegment, country:US


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.0790.079-0.026-0.186-0.16-0.302-1.117-0.2650.2020.5940.64-0.066
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.0-0.0-0.0-0.0-0.0-0.1-0.00.00.10.1-0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.0-0.0-0.0-0.0-0.0-0.1-0.00.00.10.1-0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment country:US100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, country:CA, clh:EnvironmentalServices


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value76886088919994859998
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.611.38.610.310.511.210.911.011.611.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.611.38.610.310.511.210.911.011.611.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments country:CA clh:EnvironmentalServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, country:CA, clh:EnvironmentalServicesSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value106776897
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.59.69.711.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.59.69.711.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments country:CA clh:EnvironmentalServicesSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, country:CA, clh:SafetyKleen


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value24241723252725192726
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.13.12.42.82.93.12.92.63.23.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.13.12.42.82.93.12.92.63.23.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments country:CA clh:SafetyKleen100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, country:CA, clh:SafetyKleenSustainabilitySolutionsSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value23169.2214
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.52.01.31.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.52.01.31.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments country:CA clh:SafetyKleenSustainabilitySolutionsSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, country:US, clh:EnvironmentalServices


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value437409403440450450431388435410
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax54.952.656.851.351.850.549.749.750.748.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax54.952.656.851.351.850.549.749.750.748.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments country:US clh:EnvironmentalServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, country:US, clh:EnvironmentalServicesSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value616575543607
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax66.671.276.670.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax66.671.276.670.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments country:US clh:EnvironmentalServicesSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, country:US, clh:SafetyKleen


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value258257228306302313316286295307
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax32.433.032.235.734.835.236.536.734.436.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax32.433.032.235.734.835.236.536.734.436.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments country:US clh:SafetyKleen100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, country:US, clh:SafetyKleenSustainabilitySolutionsSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value18013888139
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax19.517.212.416.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax19.517.212.416.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments country:US clh:SafetyKleenSustainabilitySolutionsSegment100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService

clh:FieldandEmergencyResponse


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value1061051111151271058795867181777669767061
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.513.014.014.917.912.310.010.710.09.29.59.19.09.310.19.48.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.513.014.014.917.912.310.010.710.09.29.59.19.09.310.19.48.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax clh:FieldandEmergencyResponse100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

clh:IndustrialServicesAndOther


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value15011911312495147155162163150
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.214.814.316.013.417.117.918.218.919.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.214.814.316.013.417.117.918.218.919.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax clh:IndustrialServicesAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

clh:SafetlyKleenEnvironmentalServices


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value199194196203194214210217216207200200200194191192191
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.524.124.726.127.425.024.224.424.926.523.323.823.625.925.325.627.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.524.124.726.127.425.024.224.424.926.523.323.823.625.925.325.627.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax clh:SafetlyKleenEnvironmentalServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

clh:SafetyKleenOil


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value162116775011512312599133128115
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.614.410.07.113.513.914.512.715.815.215.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.614.410.07.113.513.914.512.715.815.215.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax clh:SafetyKleenOil100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

clh:TechnicalServices


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value306272287257241275299292275251279264257236246254230
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax33.133.736.233.134.132.134.432.831.832.332.531.430.331.532.633.833.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax33.133.736.233.134.132.134.432.831.832.332.531.430.331.532.633.833.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax clh:TechnicalServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Product


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1911451109872138139151153124150157152130132143141
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.718.013.912.610.216.216.017.017.715.917.618.717.917.317.719.018.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.718.013.912.610.216.216.017.017.715.917.618.717.917.317.719.018.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Product100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Service


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value734662685681637719731739715656707685696619615612610
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax79.382.086.187.489.883.884.083.082.384.182.481.382.182.782.381.081.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax79.382.086.187.489.883.884.083.082.384.182.481.382.182.782.381.081.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Service100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments

clh:EnvironmentalServices


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302014-03-312013-03-31
Value5465274965665785865264734335425194394424404493951076194126171180194
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax68.667.770.066.066.465.860.660.750.564.461.258.659.358.259.757.5155.526.717.719.221.322.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax68.667.770.066.066.465.860.660.750.564.461.258.659.358.259.757.5155.526.717.719.221.322.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax clh:EnvironmentalServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

clh:EnvironmentalServicesSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value724654612705
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax78.281.086.382.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax78.281.086.382.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax clh:EnvironmentalServicesSegment100.0100.0100.0100.0

clh:SafetyKleen


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value250251214293293306342306422300328309302315302292288297277246
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax31.532.330.234.233.734.339.439.349.235.738.741.340.541.740.242.541.840.739.838.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax31.532.330.234.233.734.339.439.349.235.738.741.340.541.740.242.541.840.739.838.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax clh:SafetyKleen100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

clh:SafetyKleenSustainabilitySolutionsSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value20215397153
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.819.013.717.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.819.013.717.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax clh:SafetyKleenSustainabilitySolutionsSegment100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical

country:CA


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value1299310111278112118127120105126124134118130128102
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.011.612.714.511.013.113.614.313.813.514.814.815.915.717.217.114.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.011.612.714.511.013.113.614.313.813.514.814.815.915.717.217.114.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:CA100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

country:US


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value796714695666631746752764748675731718714631625624585
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax86.088.487.385.589.086.986.485.786.286.585.285.284.184.382.882.985.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax86.088.487.385.589.086.986.485.786.286.585.285.284.184.382.882.985.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:US100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value926808796779710858871891868780858843849749747755752688692729697636713893936732845851858846879907860862558533523572545556447434417487471354
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:SellingGeneralAndAdministrativeExpense


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value12412111110610312912312212311414112112511511811311211299110107104929312010710399115118104114122128756066707565585455535045
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.415.114.013.714.615.114.113.714.314.716.514.414.815.315.915.014.916.314.415.215.316.413.010.412.914.712.311.713.514.111.912.614.214.913.511.312.812.413.811.813.012.613.411.010.812.8

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value42754152413141064077413241084021395538823738377437153684370637483806364536813712369236413431359937463546370437613932386339533956383238033825244921222092208520101965188016021401
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:StatementGeographical

country:CA


Assetsus-gaap:
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value6836956816846696486846736817217427186987217678508538519149971014112811771233120912661281
Percentage of Assets16.516.917.017.317.217.318.118.118.519.519.818.919.219.620.723.023.424.825.426.628.630.531.331.431.332.033.5
Percentage of Assets16.516.917.017.317.217.318.118.118.519.519.818.919.219.620.723.023.424.825.426.628.630.531.331.431.332.033.5
Percentage of Assets country:CA100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

country:US


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value35663472344734523461352134133339327032123090309030413002298530053088294729602944283727832575268127452528257225802695265226842555
Percentage of Assets83.483.683.584.184.985.283.183.082.782.882.781.981.981.580.580.281.180.880.479.376.876.475.174.573.371.369.468.668.668.667.966.8
Percentage of Assets83.483.683.584.184.985.283.183.082.782.882.781.981.981.580.580.281.180.880.479.376.876.475.174.573.371.369.468.668.668.667.966.8
Percentage of Assets country:US100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NonUs


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value709680683653616610695
Percentage of Assets16.616.416.515.915.114.816.9
Percentage of Assets16.616.416.515.915.114.816.9
Percentage of Assets us-gaap:NonUs100.0100.0100.0100.0100.0100.0100.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value42754152413141064077413241084021395538823738377437153684370637483806364536813712369236413431359937463546370437613932386339533956383238033825244921222092208520101965188016021401
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value14091348134113041253120512691235120911711169119711611145118810841096
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets33.032.532.531.830.829.230.930.730.630.231.331.731.231.132.129.431.9

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312017-12-312016-12-312015-12-312014-12-31
Value-1.749-1.749-1.749-1.56-1.56-1.56-1.56-1.604-1.604-1.686-1.794-1.953-1.953
Percentage of StockholdersEquity-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.2-0.20.0
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312017-12-312016-12-312015-12-31
Value-25.928-28.073-33.629-36.648-38.993-38.123-20.839-25.3-8.7730.00.00.0
Percentage of StockholdersEquity-1.8-2.1-2.5-2.8-3.1-3.2-1.6-2.0-0.70.00.00.0
Percentage of Assets-0.6-0.7-0.8-0.9-1.0-0.9-0.5-0.6-0.20.00.00.0
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312017-12-312016-12-312015-12-312014-12-31
Value0.0130.0610.1350.2540.3750.0790.1430.179-0.069-0.146-0.3210.00.0
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.0-0.0-0.0-0.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.0-0.0-0.0-0.00.00.0
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value-188.889-199.529-211.477-239.444-251.829-269.357-210.051-223.69-214.271-219.347-223.371-185.505-194.095-189.153-172.407-214.326-254.892-110.842
Percentage of StockholdersEquity-13.4-14.8-15.8-18.4-20.1-22.3-16.5-18.1-17.7-18.7-19.1-15.5-16.7-16.5-14.5-19.8-23.30.0
Percentage of Assets-4.4-4.8-5.1-5.8-6.2-6.5-5.1-5.6-5.4-5.7-6.0-4.9-5.2-5.1-4.7-5.8-7.4-3.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312017-12-312016-12-312015-12-312014-12-31
Value-161.225-169.768-176.234-201.49-211.651-229.753-187.795-196.965-212.925-170.575-212.211-252.939-108.889
Percentage of StockholdersEquity-11.4-12.6-13.1-15.4-16.9-19.1-14.8-15.9-18.2-14.4-19.6-23.10.0
Percentage of Assets-3.8-4.1-4.3-4.9-5.2-5.6-4.6-4.9-5.7-4.6-5.8-7.4-2.9
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value539555582613629628644648648652655661664675686725738
Percentage of StockholdersEquity38.341.243.447.050.252.150.752.553.655.756.055.357.358.957.866.967.4
Percentage of Assets12.613.414.114.915.415.215.716.116.416.817.517.517.918.318.519.721.5
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value0.5440.5460.5480.5520.5560.5560.5580.5580.5590.5580.5580.560.5610.5620.5650.5730.576
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value1058991969930875846834810774738737720689658673572612
Percentage of StockholdersEquity75.173.572.371.369.870.265.765.664.063.063.060.259.457.556.652.855.9
Percentage of Assets24.823.923.522.721.520.520.320.219.619.019.719.118.617.918.215.617.9
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value16771542152514931431148614001300121311481202117611361079115411601234106110921049111910639211072116310431126115311501114117111411105107310861109865881891826866997752620
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets39.237.136.936.435.136.034.132.330.729.632.231.230.629.331.131.032.429.129.728.330.329.226.829.831.029.430.430.729.328.829.628.928.828.228.445.340.842.142.841.144.153.147.044.3

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2020-09-302020-06-302019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value475447371226215197186319361446297306257352355184179173233246258278249310248263222229523296241260257377531302280295206233249119
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets11.611.09.16.15.75.35.18.69.611.78.28.36.99.69.85.45.04.66.66.76.97.16.47.86.36.95.86.021.414.011.512.512.819.228.318.90.00.00.016.70.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value595496519475447432371282204167226215197186319306
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.912.012.611.611.010.59.17.05.24.36.15.75.35.18.68.3

Marketable Securities Current

us-gaap:MarketableSecuritiesCurrent

us-gaap:MarketableSecuritiesCurrent


Marketable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value7074515659624246555752373637380.00.01211101011119.7014.9970.1110.0930.1284.1433.1742.072
Percentage of MarketableSecuritiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.71.81.31.41.51.51.01.21.41.51.41.01.01.01.00.00.00.30.30.30.30.30.50.50.20.00.00.00.20.20.1

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value659620611602572658644641632613606608590551528531512480496512503458496600684521557575575566579603549563541399397463449414352347332274
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets15.414.914.814.714.015.915.716.016.015.816.216.115.915.014.314.213.513.213.513.813.612.614.516.718.314.715.015.314.614.714.715.214.414.814.216.318.722.121.620.618.018.520.819.6

Inventory Net

us-gaap:InventoryNet

us-gaap:InventoryNet


Inventory
Period End2021-06-302021-03-312020-12-312019-12-31
Value215219220214
Percentage of InventoryNet100.0100.0100.0100.0
Percentage of Assets5.05.35.35.2

us-gaap:InventoryNet us-gaap:PublicUtilitiesInventory

clh:OilAndOilRelatedProducts


Inventory
Period End2021-06-302021-03-312020-12-312019-12-31
Value75767675
Percentage of InventoryNet34.834.734.635.1
Percentage of Assets1.81.81.81.8
Percentage of Assets clh:OilAndOilRelatedProducts0.00.00.00.0

clh:OtherInventories


Inventory
Period End2021-06-302021-03-312020-12-312019-12-31
Value12131514
Percentage of InventoryNet5.76.17.06.6
Percentage of Assets0.30.30.40.3
Percentage of Assets clh:OtherInventories0.00.00.00.0

clh:SolventAndSolutions


Inventory
Period End2021-06-302021-03-312020-12-312019-12-31
Value8.9769.1458.8129.973
Percentage of InventoryNet4.24.24.04.6
Percentage of Assets0.20.20.20.2
Percentage of Assets clh:SolventAndSolutions0.00.00.00.0

clh:SuppliesAndDrums


Inventory
Period End2020-12-312019-12-31
Value120115
Percentage of InventoryNet54.453.6
Percentage of Assets2.92.8
Percentage of Assets clh:SuppliesAndDrums0.00.0

us-gaap:PublicUtilitiesInventorySupplies


Inventory
Period End2021-06-302021-03-312020-12-31
Value119120120
Percentage of InventoryNet55.355.054.4
Percentage of Assets2.82.92.9
Percentage of Assets us-gaap:PublicUtilitiesInventorySupplies0.00.00.0

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value7676675869444838424542353438353235555640494446446057
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.81.81.61.41.71.11.20.91.11.21.10.90.91.00.90.90.91.51.51.11.31.21.31.21.61.6

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value7.87.68.29.68.89.28.68.48.79.58.48.18.69.29.38.99.79.19.7109.99.6109.98.8119.29.18.99.59.28.88.85.44.43.53.93.73.22.92.92.92.8
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value153915531547158815931596158815611614160916311587161116021609161116481594159615321531156215021558157916111588160216151554154915311003955918903880848683655589
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets37.538.137.438.739.640.440.941.842.843.344.342.843.042.144.143.844.443.243.844.742.541.742.442.142.041.041.140.540.840.640.740.041.045.043.943.343.843.236.340.942.1

us-gaap:PropertyPlantAndEquipmentNet us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Property
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value899085939181735678
Percentage of PropertyPlantAndEquipmentNet5.85.85.55.95.75.14.63.64.9
Percentage of Assets2.22.22.12.32.32.01.91.52.1
Percentage of Assets us-gaap:CorporateNonSegment0.00.00.00.011.911.811.58.511.2

us-gaap:PropertyPlantAndEquipmentNet us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, clh:EnvironmentalServices


Property
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value890904909939946956953951927
Percentage of PropertyPlantAndEquipmentNet57.858.258.859.159.459.960.060.958.4
Percentage of Assets21.722.222.022.923.524.224.625.525.0
Percentage of Assets us-gaap:OperatingSegments clh:EnvironmentalServices0.00.00.00.054.154.455.358.060.2

us-gaap:OperatingSegments, clh:SafetyKleen


Property
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value559558552555556559561553582
Percentage of PropertyPlantAndEquipmentNet36.336.035.735.034.935.035.335.436.7
Percentage of Assets13.613.713.413.513.814.114.514.815.7
Percentage of Assets us-gaap:OperatingSegments clh:SafetyKleen0.00.00.00.037.037.036.938.639.6

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value54454352752452351952552452551751451449749247847847246946547046146045344745244545244957856557059057557259315713512512213488616056
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.713.112.812.812.812.612.813.013.313.313.813.613.413.412.912.812.412.912.612.712.512.613.212.412.112.612.212.014.714.614.414.915.015.015.56.46.46.05.96.74.53.33.84.0

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

us-gaap:OperatingSegments, clh:EnvironmentalServices


Goodwillus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-09-302016-06-302016-03-312015-12-31
Value212211210209212212212204207172238220220216
Percentage of Goodwill40.340.340.340.440.540.540.539.640.336.050.647.947.947.8
Percentage of Assets5.15.15.25.15.25.35.45.35.54.76.46.06.16.3
Percentage of Assets us-gaap:OperatingSegments clh:EnvironmentalServices0.00.00.00.00.012.112.111.912.611.20.00.00.00.0

us-gaap:OperatingSegments, clh:EnvironmentalServicesSegment


Goodwillus-gaap:
Period End2021-06-302021-03-312020-12-31
Value403402401
Percentage of Goodwill74.074.076.3
Percentage of Assets9.49.79.7
Percentage of Assets us-gaap:OperatingSegments clh:EnvironmentalServicesSegment0.00.00.0

us-gaap:OperatingSegments, clh:SafetyKleen


Goodwillus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312017-06-302017-03-312016-12-31
Value314313312309312311312313307306304300296
Percentage of Goodwill59.759.759.759.659.559.559.560.459.764.064.464.063.6
Percentage of Assets7.67.67.77.57.67.87.98.18.28.38.08.28.0
Percentage of Assets us-gaap:OperatingSegments clh:SafetyKleen0.00.00.00.00.020.820.620.621.520.80.00.00.0

us-gaap:OperatingSegments, clh:SafetyKleenSustainabilitySolutionsSegment


Goodwillus-gaap:
Period End2021-06-302021-03-312020-12-31
Value141141125
Percentage of Goodwill26.026.023.7
Percentage of Assets3.33.43.0
Percentage of Assets us-gaap:OperatingSegments clh:SafetyKleenSustainabilitySolutionsSegment0.00.00.0

us-gaap:Goodwill us-gaap:StatementBusinessSegments

clh:EnvironmentalServices


Goodwillus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312012-12-28
Value212211210209212212212204207204192187172169238220220216209209171173170172171172174174
Percentage of Goodwill40.340.340.340.440.540.540.539.640.339.838.738.136.036.450.647.947.947.846.746.338.638.438.029.730.330.229.30.0
Percentage of Assets5.15.15.25.15.25.35.45.35.55.45.25.14.74.66.46.06.16.35.85.64.84.74.54.44.44.44.60.0
Percentage of Assets clh:EnvironmentalServices0.00.00.00.00.00.00.00.00.011.911.511.111.20.025.925.925.726.926.425.924.223.823.123.222.222.321.30.0

clh:EnvironmentalServicesSegment


Goodwillus-gaap:
Period End2021-06-302021-03-312020-12-31
Value403402401
Percentage of Goodwill74.074.076.3
Percentage of Assets9.49.79.7
Percentage of Assets clh:EnvironmentalServicesSegment0.00.00.0

clh:SafetyKleen


Goodwillus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-03-312015-12-312015-09-302014-12-312012-12-312011-12-31
Value314313312309312311312313307309304305306306304300296504949504360.0
Percentage of Goodwill59.759.759.759.659.559.559.560.459.760.261.361.964.064.064.464.063.610.911.011.211.273.60.0
Percentage of Assets7.67.67.77.57.67.87.98.18.28.28.28.38.38.28.08.28.01.41.41.41.411.40.0
Percentage of Assets clh:SafetyKleen0.00.00.00.00.00.00.00.00.021.421.221.220.820.720.620.320.110.010.110.09.426.20.0

clh:SafetyKleenSustainabilitySolutionsSegment


Goodwillus-gaap:
Period End2021-06-302021-03-312020-12-31
Value141141125
Percentage of Goodwill26.026.023.7
Percentage of Assets3.33.43.0
Percentage of Assets clh:SafetyKleenSustainabilitySolutionsSegment0.00.00.0

Indefinite Lived Intangible Assets Excluding Goodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:Trademarks


Indefinite
Period End2020-12-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value123122122123122123123124122122122122122122122123122122123124124124124115115
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.03.03.33.33.33.33.33.33.23.43.33.33.33.43.63.43.33.53.33.33.23.23.22.93.0
Percentage of Assets us-gaap:Trademarks0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TrademarksAndTradeNames


Indefinite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value123123123122122122122122122122122
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill0.00.0100.00.00.00.0100.00.00.00.0100.0
Percentage of Assets2.93.03.03.03.03.03.03.13.13.23.3
Percentage of Assets us-gaap:TrademarksAndTradeNames0.00.00.00.00.00.00.00.00.00.00.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value374380386392400406419425433438441451455464469477482490498507492502506518534520530541553557569567555566572151138138139140127113114114
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.89.29.49.69.89.810.210.611.011.311.812.012.312.612.712.712.713.513.513.713.313.814.814.414.314.714.314.414.114.414.414.314.514.915.06.26.56.66.77.06.56.07.18.2

us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, clh:EnvironmentalServices


Intangible
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value78808385899193959397
Percentage of IntangibleAssetsNetExcludingGoodwill20.420.520.820.921.421.421.521.721.120.8
Percentage of Assets1.92.02.02.12.22.32.42.42.52.6
Percentage of Assets us-gaap:OperatingSegments clh:EnvironmentalServices0.00.00.00.00.05.25.35.55.76.3

us-gaap:OperatingSegments, clh:EnvironmentalServicesSegment


Intangible
Period End2021-06-302021-03-312020-12-31
Value221224228
Percentage of IntangibleAssetsNetExcludingGoodwill59.259.159.0
Percentage of Assets5.25.45.5
Percentage of Assets us-gaap:OperatingSegments clh:EnvironmentalServicesSegment0.00.00.0

us-gaap:OperatingSegments, clh:SafetyKleen


Intangible
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value307311316321329334340343348371
Percentage of IntangibleAssetsNetExcludingGoodwill79.679.579.279.178.678.678.578.378.979.2
Percentage of Assets7.47.67.87.88.08.38.68.99.310.0
Percentage of Assets us-gaap:OperatingSegments clh:SafetyKleen0.00.00.00.00.022.322.522.624.425.3

us-gaap:OperatingSegments, clh:SafetyKleenSustainabilitySolutionsSegment


Intangible
Period End2021-06-302021-03-312020-12-31
Value152155158
Percentage of IntangibleAssetsNetExcludingGoodwill40.840.941.0
Percentage of Assets3.63.73.8
Percentage of Assets us-gaap:OperatingSegments clh:SafetyKleenSustainabilitySolutionsSegment0.00.00.0

us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:StatementGeographical

country:CA


Intangible
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value4346486063719411074
Percentage of IntangibleAssetsNetExcludingGoodwill11.311.111.112.912.714.117.819.412.9
Percentage of Assets1.11.11.31.61.72.12.52.81.9
Percentage of Assets country:CA6.46.77.58.48.78.48.38.75.8

country:US


Intangible
Period End2020-12-312019-12-312018-12-312017-12-31
Value342372393408
Percentage of IntangibleAssetsNetExcludingGoodwill88.788.988.987.1
Percentage of Assets8.39.110.511.0
Percentage of Assets country:US9.910.912.713.7

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value250256263269277284296303310316319327333341345353359368376384369379384395411397406417429433445452439451457
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.96.26.46.66.86.97.27.57.98.18.58.79.09.39.39.49.510.110.210.410.010.411.211.011.011.211.011.110.911.211.311.411.511.912.0

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

clh:Permits


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value87878889929397979899989998991001011021031041039810010010110310310110310510410610798102102
Percentage of FiniteLivedIntangibleAssetsNet34.834.133.733.333.232.832.832.331.831.430.830.329.629.129.028.828.528.127.727.026.626.626.125.625.226.124.924.724.624.223.923.822.422.622.4
Percentage of Assets2.02.12.12.22.32.32.42.42.52.62.62.62.72.72.72.72.72.82.82.82.72.82.92.82.82.92.72.72.72.72.72.72.62.72.7
Percentage of Assets clh:Permits0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value159164170175180186193199206210213221228235240247252259265268263270275283296282292301310315325330329338345
Percentage of FiniteLivedIntangibleAssetsNet63.764.264.664.965.065.465.465.966.366.666.967.768.568.969.569.970.370.570.769.771.471.371.671.671.971.072.072.172.472.873.073.274.875.075.4
Percentage of Assets3.74.04.14.34.44.54.75.05.25.45.75.96.16.46.56.66.67.17.27.27.17.48.07.97.98.07.98.07.98.28.28.48.68.99.0
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherIntangibleAssets


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value3.9144.2274.5434.8194.9195.1975.3135.6035.9326.2537.5196.4326.3246.9015.1744.6634.5075.2355.798127.4677.8668.83510111112131212131312109.906
Percentage of FiniteLivedIntangibleAssetsNet1.61.61.71.81.81.81.81.81.92.02.42.01.92.01.51.31.31.41.53.32.02.12.32.72.92.93.13.23.02.93.13.02.82.42.2
Percentage of Assets0.10.10.10.10.10.10.10.10.10.20.20.20.20.20.10.10.10.10.20.30.20.20.30.30.30.30.30.40.30.30.30.30.30.30.3
Percentage of Assets us-gaap:OtherIntangibleAssets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Intangible Assets Net Including Goodwill

us-gaap:IntangibleAssetsNetIncludingGoodwill

us-gaap:IntangibleAssetsNetIncludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value91892391391692392694495095895695694796395998211401169
Percentage of IntangibleAssetsNetIncludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets21.522.222.122.322.722.423.023.624.224.625.625.626.228.026.528.930.6

us-gaap:IntangibleAssetsNetIncludingGoodwill us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, clh:EnvironmentalServices


Intangible
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value291291294294302303306299300269
Percentage of IntangibleAssetsNetIncludingGoodwill31.931.831.831.832.032.031.931.331.428.5
Percentage of Assets7.17.17.27.17.47.67.77.78.07.3
Percentage of Assets us-gaap:OperatingSegments clh:EnvironmentalServices0.00.00.00.00.017.417.417.418.317.5

us-gaap:OperatingSegments, clh:EnvironmentalServicesSegment


Intangible
Period End2021-06-302021-03-312020-12-31
Value624627630
Percentage of IntangibleAssetsNetIncludingGoodwill68.067.969.0
Percentage of Assets14.615.115.3
Percentage of Assets us-gaap:OperatingSegments clh:EnvironmentalServicesSegment0.00.00.0

us-gaap:OperatingSegments, clh:SafetyKleen


Intangible
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value622624629631641646652656655677
Percentage of IntangibleAssetsNetIncludingGoodwill68.168.268.268.268.068.068.168.768.671.5
Percentage of Assets15.115.215.415.315.616.116.516.917.518.3
Percentage of Assets us-gaap:OperatingSegments clh:SafetyKleen0.00.00.00.00.043.043.143.345.846.1

us-gaap:OperatingSegments, clh:SafetyKleenSustainabilitySolutionsSegment


Intangible
Period End2021-06-302021-03-312020-12-31
Value294296283
Percentage of IntangibleAssetsNetIncludingGoodwill32.032.131.0
Percentage of Assets6.97.16.9
Percentage of Assets us-gaap:OperatingSegments clh:SafetyKleenSustainabilitySolutionsSegment0.00.00.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value135142150146153160162164173170
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.23.43.63.63.83.93.94.14.44.4

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1316161014111312121718171616171913131334231615131718181718181815141314101010109.166145.7286.6873.942
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.40.40.20.40.30.30.30.30.50.50.50.40.40.50.50.40.40.40.90.60.40.50.40.50.50.50.50.50.50.50.40.40.30.40.40.50.50.50.50.70.30.40.3

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value24921319521318826729827725324227624824723722422322421822922622218824129536524426725126228431632127326325617417217217820115613513697
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.85.14.75.24.66.57.36.96.46.27.46.66.76.56.06.05.96.06.26.16.05.27.08.29.76.97.26.76.77.48.08.17.16.96.77.18.18.28.510.07.97.28.57.0

Accrued Liabilities Current

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccruedLiabilitiesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3112842952932892552762532242082332292001941872131911831902262031911932442411872192602452132362562422122321361301141471381189511690
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.36.87.27.17.16.26.76.35.75.46.26.15.45.35.15.75.05.05.26.15.55.35.66.86.45.35.96.96.25.56.06.56.35.66.15.66.25.57.16.96.05.17.26.5

Contract With Customer Liability Current

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:ContractWithCustomerLiabilityCurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value8383746761717373756761656867
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.02.01.81.61.51.71.81.81.91.71.71.71.81.8

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value711650636641604658720680633597602576543524503529619488504539520465517625697519572608606587639669604564569365361342381393325282306233
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets16.615.715.415.614.815.917.516.916.015.416.115.314.614.213.614.116.313.413.714.514.112.815.117.418.614.715.516.215.415.216.216.915.814.814.914.917.016.418.319.616.615.019.116.7

Long Term Debt Current

us-gaap:LongTermDebtCurrent

us-gaap:LongTermDebtCurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value7.5357.5357.5357.5357.5357.5357.5357.5357.5357.5357.5357.5354.04.04.04.01070.0
Percentage of LongTermDebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.20.20.10.10.10.12.80.0

us-gaap:LongTermDebtCurrent us-gaap:DebtInstrument, us-gaap:LongtermDebtType

clh:TermLoanAgreement, us-gaap:SecuredDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value7.5357.5357.5357.5357.5357.5357.5357.5357.5357.5357.5357.5354.04.04.04.04.00.0
Percentage of LongTermDebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.03.70.0
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.20.20.10.10.10.10.10.0
Percentage of Assets clh:TermLoanAgreement us-gaap:SecuredDebt0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value353536363839404142
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.90.90.90.91.01.01.01.1

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value666057535589726358525536353434333534363835374445424342505247585756545638282837372422
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.61.51.41.31.42.21.81.61.51.31.51.01.00.90.90.90.91.01.01.00.91.01.31.31.11.21.21.31.31.21.51.51.51.41.51.61.31.41.81.91.31.4

Taxes Payable Current

us-gaap:TaxesPayableCurrent

us-gaap:TaxesPayableCurrent


Taxes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value253025545441354040302537272827493729356039363777642938674635385444323524171814241619
Percentage of TaxesPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.70.61.31.31.00.91.01.00.80.71.00.70.80.71.31.00.81.01.61.11.01.12.21.70.81.01.81.20.91.01.41.20.90.91.00.80.90.71.20.91.2

Liabilities Noncurrent

us-gaap:LiabilitiesNoncurrent

us-gaap:LiabilitiesNoncurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value215521532153216022182267211821062112211219662000201020142014209020862093209320722055205918181852187618631868183118271831183818111813181518241077799799803776782776515553
Percentage of LiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets50.451.952.152.654.454.951.652.453.454.452.653.054.154.754.455.854.857.456.855.855.756.653.051.450.152.550.548.746.547.446.545.847.347.747.744.037.738.238.538.639.841.332.239.5

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value15471548154915501626170215541555156215641565161616241625162516251626163316331632163116311382139513951395139513951395140014001400140014001400800523523524524524525264292
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets36.237.337.537.839.941.237.838.739.540.341.942.843.744.143.943.442.744.844.444.044.244.840.338.837.239.337.737.135.536.235.435.436.536.836.632.724.725.025.126.126.727.916.520.9

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-312019-12-31
Value228230230231
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0
Percentage of Assets5.35.55.65.6

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312019-12-31
Value95888345
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0
Percentage of Assets2.22.12.01.1

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value101107114110115120121122130
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.42.62.82.72.82.92.93.13.3

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value37
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets0.9

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value29
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets0.7

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value21
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets0.5

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value14
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.4

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value25
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets0.6

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value151161164173172
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0
Percentage of Assets3.73.94.14.44.4

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value172
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0
Percentage of Assets4.2

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value21
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets0.5

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value14091348134113041253120512691235120911711169119711611145118810841096
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets33.032.532.531.830.829.230.930.730.630.231.331.731.231.132.129.431.9

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312017-12-312016-12-312015-12-312014-12-31
Value-1.749-1.749-1.749-1.56-1.56-1.56-1.56-1.604-1.604-1.686-1.794-1.953-1.953
Percentage of StockholdersEquity-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.2-0.20.0
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312017-12-312016-12-312015-12-31
Value-25.928-28.073-33.629-36.648-38.993-38.123-20.839-25.3-8.7730.00.00.0
Percentage of StockholdersEquity-1.8-2.1-2.5-2.8-3.1-3.2-1.6-2.0-0.70.00.00.0
Percentage of Assets-0.6-0.7-0.8-0.9-1.0-0.9-0.5-0.6-0.20.00.00.0
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312017-12-312016-12-312015-12-312014-12-31
Value0.0130.0610.1350.2540.3750.0790.1430.179-0.069-0.146-0.3210.00.0
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.0-0.0-0.0-0.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.0-0.0-0.0-0.00.00.0
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value-188.889-199.529-211.477-239.444-251.829-269.357-210.051-223.69-214.271-219.347-223.371-185.505-194.095-189.153-172.407-214.326-254.892-110.842
Percentage of StockholdersEquity-13.4-14.8-15.8-18.4-20.1-22.3-16.5-18.1-17.7-18.7-19.1-15.5-16.7-16.5-14.5-19.8-23.30.0
Percentage of Assets-4.4-4.8-5.1-5.8-6.2-6.5-5.1-5.6-5.4-5.7-6.0-4.9-5.2-5.1-4.7-5.8-7.4-3.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312017-12-312016-12-312015-12-312014-12-31
Value-161.225-169.768-176.234-201.49-211.651-229.753-187.795-196.965-212.925-170.575-212.211-252.939-108.889
Percentage of StockholdersEquity-11.4-12.6-13.1-15.4-16.9-19.1-14.8-15.9-18.2-14.4-19.6-23.10.0
Percentage of Assets-3.8-4.1-4.3-4.9-5.2-5.6-4.6-4.9-5.7-4.6-5.8-7.4-2.9
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value539555582613629628644648648652655661664675686725738
Percentage of StockholdersEquity38.341.243.447.050.252.150.752.553.655.756.055.357.358.957.866.967.4
Percentage of Assets12.613.414.114.915.415.215.716.116.416.817.517.517.918.318.519.721.5
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value0.5440.5460.5480.5520.5560.5560.5580.5580.5590.5580.5580.560.5610.5620.5650.5730.576
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value1058991969930875846834810774738737720689658673572612
Percentage of StockholdersEquity75.173.572.371.369.870.265.765.664.063.063.060.259.457.556.652.855.9
Percentage of Assets24.823.923.522.721.520.520.320.219.619.019.719.118.617.918.215.617.9
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value544000.0546000.0548000.0552000.0556000.0556000.0558000.0558000.0559000.0558000.0558000.0560000.0561000.0562000.0565000.0569000.0572000.0572000.0573000.0574000.0575000.0576000.0576000.0577000.0584000.0587000.0589000.0600000.0606000.0607000.0607000.0606000.0606000.0605000.0604000.0534000.0533000.0533000.0532000.0530000.0530000.0264000.0264000.0262000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value539555582613629628644648648652655661664675686708716720725726730733738740777789805853889900898893889885880508504501497499495492488476
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.613.414.114.915.415.215.716.116.416.817.517.517.918.318.518.918.819.819.719.619.820.121.520.620.822.321.722.722.623.322.722.623.223.323.020.723.823.923.924.825.226.230.534.0

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1058991969930875846834810774738737720689658673588576550572585595591612612571561568541634605596570534511501439427403371333296267244113
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets24.823.923.522.721.520.520.320.219.619.019.719.118.617.918.215.715.215.115.615.816.116.317.917.015.315.815.314.416.115.715.114.414.013.513.117.920.119.317.816.615.114.215.38.1

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value-188.889-199.529-211.477-239.444-251.829-269.357-210.051-223.69-214.271-219.347-223.371-185.505-194.095-189.153-172.407-169.468-193.177-208.275-214.326-211.544-210.233-209.055-254.892-229.555-176.014-188.245-110.842-74.117-25.025-61.081-19.55612-9.7352549592946311270675026
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-4.4-4.8-5.1-5.8-6.2-6.5-5.1-5.6-5.4-5.7-6.0-4.9-5.2-5.1-4.7-4.5-5.1-5.7-5.8-5.7-5.7-5.7-7.4-6.4-4.7-5.3-3.0-2.0-0.6-1.6-0.50.3-0.30.71.32.41.42.21.50.63.63.63.21.9

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value16210311314313933128146108291251177751641045957805880398611510984101811104.5961351429839915614629287560147056105-8.207
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.512.714.218.519.73.914.816.412.53.814.713.99.26.98.613.87.98.311.78.111.66.212.213.011.611.612.09.512.90.515.415.711.44.616.410.728.05.25.213.613.63.416.811.622.4-2.3

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-45.603-86.737-39.164-18.611-48.598-93.087-30.747-47.241-64.899-74.969-50.177-83.341-51.713-164.428-81.841-71.0561.498-51.868-27.938-152.418-71.408-110.013-80.14-66.305-150.837-53.36-67.598-59.402-68.96-62.334-77.745-126.326-69.191-72.25-1346.219-97.943-92.714-35.76-34.571-178.441-231.981-35.188-53.578-41.481-14.318-16.31
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.9-10.7-4.9-2.4-6.8-10.8-3.5-5.3-7.5-9.6-5.8-9.9-6.1-21.9-11.0-9.40.2-7.5-4.0-20.9-10.2-17.3-11.2-7.4-16.1-7.3-8.0-7.0-8.0-7.4-8.8-13.9-8.0-8.4-240.8-18.3-17.7-6.3-6.3-32.1-51.9-8.1-12.8-8.5-3.0-4.6

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-19.914-40.62-36.971-98.992-79.43126-9.293-20.339-8.425-15.368-60.583-16.486-14.273-19.655-23.589-119.87386-15.436-2.574-2.353-11.6322362.886-36.893-18.978-37.194-40.868-38.185-14.558-0.3343.448-30.34114259612663.545-13.79910-17.685162482.672-31.523-0.296-3.083
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.1-5.0-4.6-12.7-11.214.7-1.1-2.3-1.0-2.0-7.1-2.0-1.7-2.6-3.2-15.911.4-2.2-0.4-0.3-1.737.20.4-4.1-2.0-5.1-4.8-4.5-1.7-0.00.4-3.31.73.0172.149.90.7-2.42.0-3.23.857.20.6-6.5-0.1-0.9

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value99-22.71843281560897737-59.1361118
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.7-2.85.53.62.17.010.38.74.3-7.61.32.2

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-06-302021-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.951-0.0398.9780.663-1.6360.0190.071-0.005-0.005-83.519-0.006-0.0060.19644-22.305-6.5280.00720-18.086-0.005-0.903238.507-0.0010.0300.28-0.040.032340.016-0.241-0.26938-1.0160.3330.4864.3790.1520.615-0.227
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value71727174727477737475777372747172717271737368696967687070666967696760444138363534262524222222
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2722-16.4318-76.965-5.1694.118237.041-27.95624-1.564139.714-3.599-4.39910-13.6098.448-3.55427-36.195-63.35-61.5881062.6231.326-6.931-23.047-23.374-0.1470-17.314-16.11224-2.065-12.602-4.302-38.35763-26.148-6.876-9.275-0.58353-4.681
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value419.7031.54743-92.5241.8631825-12.0863.314134714-4.3586.96855-24.301-17.9353334-35.839-118.493-69.809160-27.065-21.366354.43-3.741-18.64251-7.943285.508-5.764-67.072123250-28.40410-14.3032.424120
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInInventories


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-1.5120.747-1.6210.532.07.0243.8877.8533.2970.8326.4241.909135.6250.027-1.3323.6312.6762.35812-1.7692.8820.6492.9864.437-22.1310.664117.8471.7092.854-0.58212-13.5735.1796.1520.0871.453
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value16210311314313933128146108291251177751641045957805880398611510984101811104.5961351429839915614629287560147056105-8.207
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.512.714.218.519.73.914.816.412.53.814.713.99.26.98.613.87.98.311.78.111.66.212.213.011.611.612.09.512.90.515.415.711.44.616.410.728.05.25.213.613.63.416.811.622.4-2.3

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value6721395429112436360.976163130-12.631841225-21.393
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.22.74.97.04.11.32.84.14.20.11.93.73.6-1.711.31.63.4-3.1

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value672154291136360.9763130-12.631
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.22.77.04.11.34.14.20.13.73.6-1.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3.3053.485.7636.6622.7863.2913.1525.0213.8345.8096.0664.0873.5623.0773.9344.042.9012.2712.7462.9962.6462.0932.00.4044.2961.852.3542.1062.0622.2782.5572.4652.0371.8872.2591.6191.4752.1412.8352.4491.1361.7441.9992.1132.3160.791
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-45.603-86.737-39.164-18.611-48.598-93.087-30.747-47.241-64.899-74.969-50.177-83.341-51.713-164.428-81.841-71.0561.498-51.868-27.938-152.418-71.408-110.013-80.14-66.305-150.837-53.36-67.598-59.402-68.96-62.334-77.745-126.326-69.191-72.25-1346.219-97.943-92.714-35.76-34.571-178.441-231.981-35.188-53.578-41.481-14.318-16.31
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.9-10.7-4.9-2.4-6.8-10.8-3.5-5.3-7.5-9.6-5.8-9.9-6.1-21.9-11.0-9.40.2-7.5-4.0-20.9-10.2-17.3-11.2-7.4-16.1-7.3-8.0-7.0-8.0-7.4-8.8-13.9-8.0-8.4-240.8-18.3-17.7-6.3-6.3-32.1-51.9-8.1-12.8-8.5-3.0-4.6

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value50414524428241565958425649443938464244514775676571525860637572666972674755273448313441391816
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-19.914-40.62-36.971-98.992-79.43126-9.293-20.339-8.425-15.368-60.583-16.486-14.273-19.655-23.589-119.87386-15.436-2.574-2.353-11.6322362.886-36.893-18.978-37.194-40.868-38.185-14.558-0.3343.448-30.34114259612663.545-13.79910-17.685162482.672-31.523-0.296-3.083
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.1-5.0-4.6-12.7-11.214.7-1.1-2.3-1.0-2.0-7.1-2.0-1.7-2.6-3.2-15.911.4-2.2-0.4-0.3-1.737.20.4-4.1-2.0-5.1-4.8-4.5-1.7-0.00.4-3.31.73.0172.149.90.7-2.42.0-3.23.857.20.6-6.5-0.1-0.9

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt


Repayments
Period End2021-06-302021-03-312020-06-302020-03-312015-12-312015-09-302014-12-312014-09-302013-12-312013-09-302012-12-312011-12-31
Value1.8841.8841.8841.8840.00.00.00.00.00.00.00.0
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.00.00.00.00.00.00.00.00.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value182635220.0175.05.1184.9486.324117.099121424125.4616.7966.3195.7355.1364.9984.1923616155633131.2250.7310.00.00.01.3080.3881.2160.02.1640.090.0231.7840.2010.0850.0980.015
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

Debt Instrument Interest Rate Stated Percentage

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

us-gaap:DebtInstrumentInterestRateStatedPercentage

clh:SeniorUnsecuredNotesdue2027, us-gaap:UnsecuredDebt


Debt
Period End2020-12-312020-06-302020-03-312019-12-312019-09-30
Value4.8750.048750.048750.048750.04875
Percentage of DebtInstrumentInterestRateStatedPercentage100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations clh:SeniorUnsecuredNotesdue2027 us-gaap:UnsecuredDebt0.00.00.00.00.0

clh:SeniorUnsecuredNotesdue2029, us-gaap:UnsecuredDebt


Debt
Period End2020-12-312020-06-302020-03-312019-12-312019-09-30
Value5.1250.051250.051250.051250.05125
Percentage of DebtInstrumentInterestRateStatedPercentage105.1105.1105.1105.1105.1
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations clh:SeniorUnsecuredNotesdue2029 us-gaap:UnsecuredDebt0.00.00.00.00.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-30
Value25.931.5-4.220.00.290.456-0.010.3280.3070.86-0.0580.2660.308-0.319-1.4150.510.473-0.1454.7720.4780.6870.1090.0170.4620.7460.3950.556
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value225231222204284222211
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value18818613312315015817621021611899
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value5.15.05.495.26.15.96.4144.64.83.1594.25.05.65.1211.81.81.71.7381.82.12.12.0642.22.62.32.5375.41.31.31.3043.93.93.03.54336394846
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value7783796855302929251112
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

clh:AccretionOfEnvironmentalLiabilities

clh:AccretionOfEnvironmentalLiabilities


Accretion
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2.8732.9532.9022.8222.7662.5612.5122.492.562.5742.4782.452.4482.432.4072.3472.4162.292.6482.4762.5482.5052.6072.5772.5992.6192.6372.6422.6092.7242.9132.9142.8792.8352.5082.4882.5052.4162.4492.4352.4072.3892.5082.4952.6022.702
Percentage of AccretionOfEnvironmentalLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

clh:AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForCurrencyTranslationAndOther

clh:AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForCurrencyTranslationAndOther


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value-226000.0-181000.0-664000.0-273000.0-486000.01108000.0-233000.0150000.0-330000.0-87000.0600000.0-240000.0260000.0386000.061000.0-536000.0-344000.0-121000.0242000.0-1515000.0-19000.0835000.0-588000.0-1338000.0315000.0-1887000.0-904000.0-1169000.0807000.0-892000.0-836000.0519000.0-902000.0-594000.0-169000.0624000.0-502000.0478000.0371000.0-1447000.0
Percentage of AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForCurrencyTranslationAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

clh:AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForCurrencyTranslationAndOther us-gaap:EnvironmentalRemediationSite

clh:RemedialLiabilitiesForInactiveSites


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-7000.0812000.0-833000.0-11000.0880000.043000.0-11000.06000.0-14000.0-10000.035000.0-10000.0-891000.09000.04000.0-30000.0-2704000.0-8000.0-129000.0-97000.01000.051000.0-34000.0-44000.037000.0-92000.0-61000.0-70000.047000.0-40000.0
Percentage of AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForCurrencyTranslationAndOther3.1-448.6125.54.0-181.13.94.74.04.211.55.84.2-342.72.36.65.6786.06.6-53.36.4-5.36.15.83.311.74.96.76.05.84.5

clh:RemedialLiabilitiesIncludingSuperfundForNonLandfillOperations


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-219000.0-993000.0169000.0-262000.0-1366000.01065000.0-221000.0144000.0-316000.0-77000.0565000.0-230000.01151000.0377000.058000.0-506000.02359000.0-113000.0371000.0-1418000.0-20000.0784000.0-556000.0-1144000.0243000.0-1575000.0-741000.0-963000.0662000.0-744000.0
Percentage of AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForCurrencyTranslationAndOther96.9548.6-25.596.0281.196.194.896.095.888.594.295.8442.797.795.194.4-685.893.4153.393.6105.393.994.685.577.183.582.082.482.083.4

clh:AmountOfAnnualAggregateSelfInsuredCorridorRetentionUnderUmbrellaPolicy

clh:AmountOfAnnualAggregateSelfInsuredCorridorRetentionUnderUmbrellaPolicy


Amount
Period End2020-12-31
Value5000000.0
Percentage of AmountOfAnnualAggregateSelfInsuredCorridorRetentionUnderUmbrellaPolicy100.0

clh:AssetRetirementObligationChangesRecordedInBalanceSheet

clh:AssetRetirementObligationChangesRecordedInBalanceSheet


Asset
Period End2021-06-302021-03-312020-12-312020-09-30
Value92000.01045000.0488000.0118000.0
Percentage of AssetRetirementObligationChangesRecordedInBalanceSheet100.0100.0100.0100.0

clh:AssetRetirementObligationChangesRecordedInBalanceSheet clh:ClosureAndPostClosureLiabilities

clh:LandfillRetirementLiability


Asset
Period End2020-12-312020-09-30
Value302000.050000.0
Percentage of AssetRetirementObligationChangesRecordedInBalanceSheet61.942.4

clh:NonLandfillRetirementLiability


Asset
Period End2021-06-302021-03-312020-12-312020-09-30
Value92000.01045000.0186000.068000.0
Percentage of AssetRetirementObligationChangesRecordedInBalanceSheet100.0100.038.157.6

clh:AssetRetirementObligationChangesRecordedInStatementOfIncome

clh:AssetRetirementObligationChangesRecordedInStatementOfIncome


Asset
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value271000.029000.0-11057000.022000.0354000.04113000.0-2827000.0249000.0-67000.0-40000.0-1060000.0-315000.0-55000.0-30000.0-17000.0-5000.0256000.06000.01908000.023000.0273000.0415000.056000.072000.0-109000.024000.0-69000.0-676000.0312000.0-216000.0-661000.0418000.0-77000.0-42000.0-258000.0-638000.0-297000.0-1000.0451000.0580000.0
Percentage of AssetRetirementObligationChangesRecordedInStatementOfIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

clh:AssetRetirementObligationChangesRecordedInStatementOfIncome clh:ClosureAndPostClosureLiabilities

clh:LandfillRetirementLiability


Asset
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value-10968000.00323000.04180000.0-248000.000037000.00000131000.000818000.00314000.0283000.0-149000.047000.0-60000.000-580000.0-142000.00-807000.0382000.0016000.0357000.0-490000.000-114000.0536000.0
Percentage of AssetRetirementObligationChangesRecordedInStatementOfIncome99.20.091.2101.68.80.0-0.0-0.0-3.5-0.0-0.0-0.0-0.0-2620.00.00.042.90.0115.068.2-266.165.355.00.0-0.085.8-45.5-0.0122.191.4-0.0-38.1-138.476.8-0.0-0.0-25.392.4

clh:NonLandfillRetirementLiability


Asset
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value271000.029000.0-89000.022000.031000.0-67000.0-2579000.0249000.0-67000.0-40000.0-1097000.0-315000.0-55000.0-30000.0-17000.0-136000.0256000.06000.01090000.023000.0-41000.0132000.0205000.025000.0-49000.024000.0-69000.0-96000.0454000.0-216000.0146000.036000.0-77000.0-58000.0-615000.0-148000.0-297000.0-1000.0565000.044000.0
Percentage of AssetRetirementObligationChangesRecordedInStatementOfIncome100.0100.00.8100.08.8-1.691.2100.0100.0100.0103.5100.0100.0100.0100.02720.0100.0100.057.1100.0-15.031.8366.134.745.0100.0100.014.2145.5100.0-22.18.6100.0138.1238.423.2100.0100.0125.37.6

clh:AssetRetirementObligationLiabilitiesAssumedInAcquisition

clh:AssetRetirementObligationLiabilitiesAssumedInAcquisition


Asset
Period End2021-06-302021-03-312020-09-30
Value0451000.00
Percentage of AssetRetirementObligationLiabilitiesAssumedInAcquisition0.0100.00.0

clh:AssetRetirementObligationLiabilitiesAssumedInAcquisition clh:ClosureAndPostClosureLiabilities

clh:NonLandfillRetirementLiability


Asset
Period End2021-06-302021-03-312020-09-30
Value0451000.00
Percentage of AssetRetirementObligationLiabilitiesAssumedInAcquisition0.0100.00.0

clh:AssetRetirementObligationsDiscountRate

clh:AssetRetirementObligationsDiscountRate


Asset
Period End2021-06-302021-03-312020-12-31
Value04.840
Percentage of AssetRetirementObligationsDiscountRate0.0100.00.0

clh:DepreciationExpenseInclusiveOfLandfillAndFinanceLeaseAmortization

clh:DepreciationExpenseInclusiveOfLandfillAndFinanceLeaseAmortization


Depreciation
Period End2021-06-302021-03-312020-06-302020-03-31
Value63646365
Percentage of DepreciationExpenseInclusiveOfLandfillAndFinanceLeaseAmortization100.0100.0100.0100.0

clh:DepreciationInclusiveofAmortization

clh:DepreciationInclusiveofAmortization


Depreciation
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value63646365686565656964646562646163616263595859585761605759
Percentage of DepreciationInclusiveofAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

clh:EmployeeRetentionCreditAmountCARESAct

clh:EmployeeRetentionCreditAmountCARESAct


Employee
Period End2020-09-30
Value13
Percentage of EmployeeRetentionCreditAmountCARESAct100.0

clh:IncomeLossFromContinuingOperationsBeforeInterestTaxDepreciationAndAmortizationNet

clh:IncomeLossFromContinuingOperationsBeforeInterestTaxDepreciationAndAmortizationNet


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value1871291361611351221321561491011211411398810112212080951261106797165163781301531351011291451231118310088100
Percentage of IncomeLossFromContinuingOperationsBeforeInterestTaxDepreciationAndAmortizationNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

clh:IncomeLossFromContinuingOperationsBeforeInterestTaxDepreciationAndAmortizationNet us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-51.584-42.435-48.722-48.444-49.192-47.472-51.832-46.371-47.502-42.64-53.493-40.644
Percentage of IncomeLossFromContinuingOperationsBeforeInterestTaxDepreciationAndAmortizationNet-27.5-32.8-35.8-30.1-36.3-38.7-39.2-29.6-31.7-41.9-43.9-28.8

clh:IncomeLossFromContinuingOperationsBeforeInterestTaxDepreciationAndAmortizationNet us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, clh:EnvironmentalServices


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value13214013810811712111789107102
Percentage of IncomeLossFromContinuingOperationsBeforeInterestTaxDepreciationAndAmortizationNet97.187.4101.988.888.777.778.788.088.472.5

us-gaap:OperatingSegments, clh:EnvironmentalServicesSegment


Income
Period End2021-06-302021-03-312020-06-302020-03-31
Value176140176145
Percentage of IncomeLossFromContinuingOperationsBeforeInterestTaxDepreciationAndAmortizationNet93.8108.3130.1119.0

us-gaap:OperatingSegments, clh:SafetyKleen


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value52684661668179546779
Percentage of IncomeLossFromContinuingOperationsBeforeInterestTaxDepreciationAndAmortizationNet38.742.734.449.950.551.953.053.955.456.3

us-gaap:OperatingSegments, clh:SafetyKleenSustainabilitySolutionsSegment


Income
Period End2021-06-302021-03-312020-06-302020-03-31
Value63318.43124
Percentage of IncomeLossFromContinuingOperationsBeforeInterestTaxDepreciationAndAmortizationNet33.724.46.219.7

clh:InterestExpenseNet us-gaap:StatementEquityComponents

clh:InterestExpenseNet

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Interest
Period End2021-06-302021-03-31
Value-2.494-2.448
Percentage of InterestExpenseNet100.0100.0

clh:NumberOfServiceLocation dei:LegalEntity, us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType

clh:NumberOfServiceLocation

clh:HydroChemPSC, clh:HydroChemPSC, us-gaap:SubsequentEvent


Number
Period End2021-08-03
Value240.0
Percentage of NumberOfServiceLocation100.0

us-gaap:AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses

us-gaap:AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1111000.01090000.01138000.01109000.01115000.01036000.01124000.01119000.01149000.01143000.01169000.01184000.01184000.01165000.01199000.01171000.01209000.01133000.01289000.01266000.01272000.01247000.0
Percentage of AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses us-gaap:EnvironmentalRemediationSite

clh:RemedialLiabilitiesForInactiveSites


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value666000.0654000.0693000.0649000.0666000.0599000.0637000.0643000.0684000.0675000.0671000.0699000.0703000.0672000.0672000.0644000.0717000.0615000.0688000.0685000.0686000.0678000.0
Percentage of AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses59.960.060.958.559.757.856.757.559.559.157.459.059.457.756.055.059.354.353.454.153.954.4

clh:RemedialLiabilitiesForLandfillSites


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value23000.022000.023000.023000.022000.022000.022000.022000.022000.022000.022000.021000.022000.021000.022000.021000.022000.021000.028000.028000.028000.026000.0
Percentage of AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses2.12.02.02.12.02.12.02.01.91.91.91.81.91.81.81.81.81.92.22.22.22.1

clh:RemedialLiabilitiesIncludingSuperfundForNonLandfillOperations


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value422000.0414000.0422000.0437000.0427000.0415000.0465000.0454000.0443000.0446000.0476000.0464000.0459000.0472000.0505000.0506000.0470000.0497000.0573000.0553000.0558000.0543000.0
Percentage of AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses38.038.037.139.438.340.141.440.638.639.040.739.238.840.542.143.238.943.944.543.743.943.5

us-gaap:AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForRevisionInEstimates

us-gaap:AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForRevisionInEstimates


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value-0.1010.246-0.4313.4211.783-0.643-2.290.128-0.041-0.8141.3880.057-0.166-0.5920.1-0.1880.0250.108-1.997-0.0110.0530.3213-3.0150.3930.4095.118-0.875-2.5621.0371.2021.6060.4120.114-7.8822.7460.647-0.0781.114
Percentage of AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForRevisionInEstimates100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForRevisionInEstimates us-gaap:EnvironmentalRemediationSite

clh:RemedialLiabilitiesForInactiveSites


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.1320.18-0.153.3530.032-0.362-0.813-0.271-0.0010.1720.186-0.1390.107-0.024-0.012-0.157-0.026-0.0941.968-0.332-0.015-0.1013.177-0.3010.0240.0275.030.082-2.7260.259
Percentage of AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForRevisionInEstimates-130.773.234.898.01.856.335.5-211.72.4-21.113.4-243.9-64.54.1-12.083.5-104.0-87.0-98.53018.2-28.3-31.623.410.06.16.698.3-9.4106.425.0

clh:RemedialLiabilitiesForLandfillSites


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-0.0390.017-0.0010.0-0.0150.001-0.040.00.00.023-0.0010.00.00.00.0130.0020.002-0.038-0.6090.001-0.0010.0715.388-2.4250.002-0.1240.2390.0-0.2520.126
Percentage of AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForRevisionInEstimates38.66.90.20.0-0.8-0.21.70.0-0.0-2.8-0.10.0-0.0-0.013.0-1.18.0-35.230.5-9.1-1.922.239.680.40.5-30.34.7-0.09.812.2

clh:RemedialLiabilitiesIncludingSuperfundForNonLandfillOperations


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-0.1940.049-0.280.0681.766-0.282-1.4370.399-0.04-1.0091.2030.196-0.273-0.5680.099-0.0330.0490.24-3.3560.320.0690.355.036-0.2890.3670.506-0.14-0.9680.4160.652
Percentage of AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForRevisionInEstimates192.119.965.02.099.043.962.8311.797.6124.086.7343.9164.595.999.017.6196.0222.2168.1-2909.1130.2109.437.09.693.4123.7-2.7110.6-16.262.9

us-gaap:AccrualForEnvironmentalLossContingenciesPayments1

us-gaap:AccrualForEnvironmentalLossContingenciesPayments1


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value3.032.0822.1251.7191.7652.5942.1632.1032.1242.4721.6522.0441.932.2082.2832.1652.5462.7462.1612.3522.3943.015
Percentage of AccrualForEnvironmentalLossContingenciesPayments1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccrualForEnvironmentalLossContingenciesPayments1 us-gaap:EnvironmentalRemediationSite

clh:RemedialLiabilitiesForInactiveSites


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1.8830.951.0541.1070.9151.2561.4211.2131.2911.1540.8480.9721.1130.8260.8071.0311.3480.720.9360.8651.1360.956
Percentage of AccrualForEnvironmentalLossContingenciesPayments162.145.649.664.451.848.465.757.760.846.751.347.657.737.435.347.652.926.243.336.847.531.7

clh:RemedialLiabilitiesForLandfillSites


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.0120.0120.0150.0160.0150.0150.0150.0150.0140.0150.0120.0120.0110.0120.0120.0110.0120.0070.0340.0270.0350.026
Percentage of AccrualForEnvironmentalLossContingenciesPayments10.40.60.70.90.80.60.70.70.70.60.70.60.60.50.50.50.50.31.61.11.50.9

clh:RemedialLiabilitiesIncludingSuperfundForNonLandfillOperations


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1.1351.121.0560.5960.8351.3230.7270.8750.8191.3030.7921.060.8061.371.4641.1231.1862.0191.1911.461.2232.033
Percentage of AccrualForEnvironmentalLossContingenciesPayments137.553.849.734.747.351.033.641.638.652.747.951.941.862.064.151.946.673.555.162.151.167.4

us-gaap:AccrualForEnvironmentalLossContingenciesPeriodIncreaseDecrease clh:ContingenciesByNatureOfContingency, us-gaap:EnvironmentalRemediationSite

us-gaap:AccrualForEnvironmentalLossContingenciesPeriodIncreaseDecrease

clh:BRFacility, clh:RemedialLiabilitiesForInactiveSites


Accrual
Period End2021-06-302021-03-312020-09-30
Value03300000.03300000.0
Percentage of AccrualForEnvironmentalLossContingenciesPeriodIncreaseDecrease0.0100.0100.0

us-gaap:AccrualForEnvironmentalLossContingenciesPeriodIncreaseDecrease us-gaap:EnvironmentalRemediationSite

clh:RemedialLiabilitiesForInactiveSites


Accrual
Period End2020-12-31
Value0
Percentage of AccrualForEnvironmentalLossContingenciesPeriodIncreaseDecrease0.0

clh:RemedialLiabilitiesForSuperfundSites


Accrual
Period End2020-12-31
Value0
Percentage of AccrualForEnvironmentalLossContingenciesPeriodIncreaseDecrease0.0

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AmortizationOfFinancingCostsAndDiscounts


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value906000.0900000.0978000.0901000.0896000.0891000.0901000.0908000.01000000.01000000.01005000.0960000.0965000.0916000.0920000.0902000.0831000.0829000.0852000.0913000.0900000.0872000.0821000.0820000.0820000.0819000.0832000.0881000.0752000.0824000.0762000.0847000.0846000.0846000.0620000.0420000.0386000.0367000.0342000.0332000.0284000.0614000.0700000.0746000.0743000.0732000.0
Percentage of AmortizationOfFinancingCostsAndDiscounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetAcquisitionConsiderationTransferred us-gaap:AssetAcquisition

us-gaap:AssetAcquisitionConsiderationTransferred

clh:VertexEnergyInc


Asset
Period End2021-06-29
Value140
Percentage of AssetAcquisitionConsiderationTransferred100.0

us-gaap:AssetRetirementObligationAccretionExpense

us-gaap:AssetRetirementObligationAccretionExpense


Asset
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value1762000.01863000.01713000.01651000.01525000.01371000.01411000.01431000.01309000.01266000.01264000.01265000.01208000.01176000.01207000.01157000.01359000.01210000.01276000.01258000.01184000.01128000.01148000.01178000.01147000.01112000.01027000.01172000.01210000.01205000.01176000.01155000.0-6948000.01013000.02869000.0-927000.0-885000.0-842000.0
Percentage of AssetRetirementObligationAccretionExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligationAccretionExpense clh:ClosureAndPostClosureLiabilities

clh:LandfillRetirementLiability


Asset
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value826000.0955000.0852000.0816000.0705000.0658000.0713000.0742000.0639000.0614000.0638000.0646000.0585000.0564000.0560000.0534000.0709000.0612000.0693000.0691000.0629000.0582000.0623000.0682000.0671000.0634000.0562000.0716000.0761000.0767000.0749000.0739000.0-5042000.0731000.02079000.0-665000.0-601000.0-554000.0
Percentage of AssetRetirementObligationAccretionExpense46.951.349.749.446.248.050.551.948.848.550.551.148.448.046.446.252.250.654.354.953.151.654.357.958.557.054.761.162.963.763.764.072.672.272.571.767.965.8

clh:NonLandfillRetirementLiability


Asset
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value936000.0908000.0861000.0835000.0820000.0713000.0698000.0689000.0670000.0652000.0626000.0619000.0623000.0612000.0647000.0623000.0650000.0598000.0583000.0567000.0555000.0546000.0525000.0496000.0476000.0478000.0465000.0456000.0449000.0438000.0427000.0416000.0-1906000.0282000.0790000.0-262000.0-284000.0-288000.0
Percentage of AssetRetirementObligationAccretionExpense53.148.750.350.653.852.049.548.151.251.549.548.951.652.053.653.847.849.445.745.146.948.445.742.141.543.045.338.937.136.336.336.027.427.827.528.332.134.2

us-gaap:AssetRetirementObligationForeignCurrencyTranslationGainLoss

us-gaap:AssetRetirementObligationForeignCurrencyTranslationGainLoss


Asset
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-31
Value-121000.0-74000.0-381000.0-152000.0-270000.0599000.0-172000.0101000.0-216000.0-196000.0387000.0-76000.079000.0133000.017000.0-164000.0-103000.0-34000.0-399000.0-7000.0223000.0
Percentage of AssetRetirementObligationForeignCurrencyTranslationGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligationForeignCurrencyTranslationGainLoss clh:ClosureAndPostClosureLiabilities

clh:LandfillRetirementLiability


Asset
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-31
Value-88000.0-65000.0-288000.0-116000.0-204000.0453000.0-140000.080000.0-172000.0-50000.0155000.0-48000.049000.078000.010000.0-100000.0-62000.0-20000.0-282000.0-4000.0156000.0
Percentage of AssetRetirementObligationForeignCurrencyTranslationGainLoss72.787.875.676.375.675.681.479.279.625.540.163.262.058.658.861.060.258.870.757.170.0

clh:NonLandfillRetirementLiability


Asset
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-31
Value-33000.0-9000.0-93000.0-36000.0-66000.0146000.0-32000.021000.0-44000.0-146000.0232000.0-28000.030000.055000.07000.0-64000.0-41000.0-14000.0-117000.0-3000.067000.0
Percentage of AssetRetirementObligationForeignCurrencyTranslationGainLoss27.312.224.423.724.424.418.620.820.474.559.936.838.041.441.239.039.841.229.342.930.0

us-gaap:AssetRetirementObligationLiabilitiesIncurred

us-gaap:AssetRetirementObligationLiabilitiesIncurred


Asset
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value696000.0646000.0458000.0563000.0490000.0590000.01061000.0586000.0339000.0719000.0466000.0574000.0425000.01053000.0505000.0482000.0463000.0431000.0333000.0387000.0642000.0621000.0826000.0998000.0574000.0753000.0919000.0762000.0993000.0921000.01194000.01384000.01077000.0860000.0965000.0962000.0691000.0639000.0720000.0580000.0
Percentage of AssetRetirementObligationLiabilitiesIncurred100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligationLiabilitiesIncurred clh:ClosureAndPostClosureLiabilities

clh:LandfillRetirementLiability


Asset
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value696000.0646000.0458000.0563000.0490000.0590000.01061000.0586000.0339000.0719000.0466000.0574000.0425000.01053000.0505000.0482000.0463000.0431000.0333000.0387000.0642000.0621000.0826000.0998000.0574000.0753000.0919000.0762000.0993000.0921000.01194000.01384000.01077000.0860000.0965000.0962000.0691000.0639000.0720000.0580000.0
Percentage of AssetRetirementObligationLiabilitiesIncurred100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligationLiabilitiesSettled

us-gaap:AssetRetirementObligationLiabilitiesSettled


Asset
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value929000.01460000.0993000.0904000.0841000.03734000.04567000.0746000.0792000.01225000.0609000.0230000.0217000.0604000.01811000.0618000.0192000.0635000.0568000.0542000.0503000.0374000.02683000.02801000.0265000.04170000.0-3810000.0854000.0912000.0685000.01972000.0861000.01004000.01285000.01698000.0780000.082000.01080000.01679000.0
Percentage of AssetRetirementObligationLiabilitiesSettled100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligationLiabilitiesSettled clh:ClosureAndPostClosureLiabilities

clh:LandfillRetirementLiability


Asset
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value751000.01329000.0862000.0733000.0521000.03408000.03991000.0156000.0163000.0437000.0428000.0204000.0155000.0508000.01713000.0437000.0119000.0542000.0429000.0363000.0112000.0456000.02510000.02734000.0246000.03148000.0-2890000.0746000.0576000.0648000.01923000.0670000.0934000.0387000.01342000.0612000.041000.0586000.01544000.0
Percentage of AssetRetirementObligationLiabilitiesSettled80.891.086.881.162.091.387.420.920.635.770.388.771.484.194.670.762.085.475.567.022.3121.993.697.692.875.575.987.463.294.697.577.893.030.179.078.550.054.392.0

clh:NonLandfillRetirementLiability


Asset
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value178000.0131000.0131000.0171000.0320000.0326000.0576000.0590000.0629000.0788000.0181000.026000.062000.096000.098000.0181000.073000.093000.0139000.0179000.0391000.0-82000.0173000.067000.019000.01022000.0-920000.0108000.0336000.037000.049000.0191000.070000.0898000.0356000.0168000.041000.0494000.0135000.0
Percentage of AssetRetirementObligationLiabilitiesSettled19.29.013.218.938.08.712.679.179.464.329.711.328.615.95.429.338.014.624.533.077.7-21.96.42.47.224.524.112.636.85.42.522.27.069.921.021.550.045.78.0

us-gaap:BusinessCombinationConsiderationTransferred1 us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationConsiderationTransferred1

clh:A2021Acquisitions


Business
Period End2021-03-27
Value22
Percentage of BusinessCombinationConsiderationTransferred1100.0

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:CapitalExpendituresIncurredButNotYetPaid


Capital
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312011-03-312010-03-31
Value3.6995.1084.311-4.75212172.324
Percentage of CapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Effect
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2276000.01639000.06365000.01997000.03384000.0-6827000.01281000.0-847000.01678000.01461000.0-4225000.0711000.0
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value800000.0700000.01300000.01700000.0400000.0800000.0300000.01000000.0700000.01100000.01200000.0800000.0700000.0900000.01000000.01200000.0800000.0800000.0500000.0900000.0800000.0500000.0500000.0100000.0600000.0500000.0400000.0500000.0500000.0400000.0
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeasePrincipalPayments


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1905000.01672000.01714000.0965000.01461000.0329000.0259000.068000.0144000.0115000.000
Percentage of FinanceLeasePrincipalPayments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:GainLossOnSaleOfBusiness

us-gaap:GainLossOnSaleOfBusiness


Gain
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302015-12-312015-09-30
Value0.0-0.118-0.184-3.0740.00.00.00.00.0-0.913-0.077310.453160.00.00.0
Percentage of GainLossOnSaleOfBusiness0.0100.0100.0100.00.00.00.00.00.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:GoodwillAcquiredDuringPeriod

us-gaap:GoodwillAcquiredDuringPeriod


Goodwill
Period End2021-03-312019-03-312018-03-312017-03-31
Value156.825154.938
Percentage of GoodwillAcquiredDuringPeriod100.0100.0100.0100.0

us-gaap:GoodwillAcquiredDuringPeriod us-gaap:BusinessAcquisition

clh:A2021Acquisitions


Goodwill
Period End2021-03-27
Value15
Percentage of GoodwillAcquiredDuringPeriod0.0

us-gaap:GoodwillAcquiredDuringPeriod us-gaap:StatementBusinessSegments

clh:SafetyKleenSustainabilitySolutionsSegment


Goodwill
Period End2021-03-31
Value15
Percentage of GoodwillAcquiredDuringPeriod100.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss

us-gaap:GoodwillForeignCurrencyTranslationGainLoss


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value951000.0707000.02763000.01154000.02096000.0-4791000.0568000.0-668000.01462000.0889000.0-3168000.01028000.0-1103000.0-1717000.0-280000.02213000.01364000.0499000.0-1203000.0-721000.0-348000.05442000.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss us-gaap:StatementBusinessSegments

clh:EnvironmentalServices


Goodwill
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1247000.0522000.0960000.0-2223000.029000.0-309000.0677000.0412000.0-1467000.0476000.0-510000.0-795000.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss45.145.245.846.45.146.346.346.346.346.346.246.3

clh:EnvironmentalServicesSegment


Goodwill
Period End2021-06-302021-03-31
Value698000.0520000.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss73.473.6

clh:SafetyKleen


Goodwill
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1516000.0632000.01136000.0-2568000.0539000.0-359000.0785000.0477000.0-1701000.0552000.0-593000.0-922000.0-146000.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss54.954.854.253.694.953.753.753.753.753.753.853.752.1

clh:SafetyKleenSustainabilitySolutionsSegment


Goodwill
Period End2021-06-302021-03-31
Value253000.0187000.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss26.626.4

us-gaap:GoodwillPurchaseAccountingAdjustments

us-gaap:GoodwillPurchaseAccountingAdjustments


Goodwill
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value00-31000.054000.002000.0-39000.0-3993000.000-69000.0-9000.0002917000.0-731000.00002095000.0
Percentage of GoodwillPurchaseAccountingAdjustments0.00.0100.0100.00.0100.0100.0100.00.00.0100.0100.00.00.0100.0100.00.00.00.0100.0

us-gaap:GoodwillPurchaseAccountingAdjustments us-gaap:StatementBusinessSegments

clh:EnvironmentalServices


Goodwill
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value00-31000.054000.00-64000.0-40000.0-2571000.000-69000.0-9000.0
Percentage of GoodwillPurchaseAccountingAdjustments0.00.0100.0100.00.0-3200.0102.664.40.00.0100.0100.0

us-gaap:GoodwillWrittenOffRelatedToSaleOfBusinessUnit

us-gaap:GoodwillWrittenOffRelatedToSaleOfBusinessUnit


Goodwill
Period End2020-12-312020-09-302020-06-302020-03-312017-12-312017-09-302016-12-31
Value0025000.0649000.0000
Percentage of GoodwillWrittenOffRelatedToSaleOfBusinessUnit0.00.0100.0100.00.00.00.0

us-gaap:GoodwillWrittenOffRelatedToSaleOfBusinessUnit us-gaap:StatementBusinessSegments

clh:EnvironmentalServices


Goodwill
Period End2020-12-312020-09-302020-06-302020-03-31
Value0025000.0649000.0
Percentage of GoodwillWrittenOffRelatedToSaleOfBusinessUnit0.00.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2.0879.956-6.718-6.5234-8.7148.996-5.281-1.032117.4230.703-3.1032.9231.585-4.387-15.1951.27713-10.4086.627-1.838-30.054-19.5221.19-0.3748.982-7.526-12.95830-8.519-6.8331.35-6.377-4.20410-17.5471.89228.8618.201-2.949-7.906-2.412155.811
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value31-0.904142348-40.902262214-17.088-17.264229.322-2.74-18.0581715-6.873-25.7113316-10.283-81.363.11853-29.528-32.7131733-20.573-18.0911129-21.128-58.2994.22112-22.9357.6660.72312-22.3593.432-5.92833-11.798
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOutstandingChecksFinancingActivities

us-gaap:IncreaseDecreaseInOutstandingChecksFinancingActivities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3.767-6.6625.0232.070.086-1.775-0.189-0.0021.255-4.7693.608-0.6731.04-3.8432.717-0.296-0.804-7.5573.9073.938-5.804-5.2187.2520.278-1.892-20.26815-3.7533.1410.0212.514-30.60213261.885-4.4594.08-13.57612-16.32618-5.2163.416-1.082-0.397-3.203
Percentage of IncreaseDecreaseInOutstandingChecksFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements


Incremental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value325000.0320000.025000.0146000.0158000.0298000.033000.0315000.0191000.0234000.054000.0232000.095000.00-3000.0162000.0146000.0000129000.0011000.0107000.0120000.0000113000.0141000.04000.0150000.0137000.0166000.0-21000.0191000.0197000.0261000.0-14000.0347000.0423000.0360000.039000.0305000.0268000.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.00.00.0100.00.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentIncomeInterest

us-gaap:InvestmentIncomeInterest


Investment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value580000.0479000.0560000.01236000.0668000.0998000.01246000.01152000.0903000.0926000.0872000.0736000.0587000.0764000.0573000.0311000.0215000.0196000.0225000.0150000.0126000.0188000.0151000.0174000.0211000.0205000.096000.0155000.0111000.0221000.0215000.0186000.0-699200.0153000.0302000.0244000.0310000.0297000.0165000.0102000.0
Percentage of InvestmentIncomeInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OciBeforeReclassificationsBeforeTaxAttributableToParent

us-gaap:OciBeforeReclassificationsBeforeTaxAttributableToParent


Oci
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value8.1339.48259.88515-61.7712
Percentage of OciBeforeReclassificationsBeforeTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0

us-gaap:OciBeforeReclassificationsBeforeTaxAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Oci
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value-0.3493.1080.535-0.123-3.0-18.3823.495
Percentage of OciBeforeReclassificationsBeforeTaxAttributableToParent-4.332.82.1-1.2-19.429.827.6

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Oci
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value-0.061-0.094-0.151-0.1530.375-0.081-0.046
Percentage of OciBeforeReclassificationsBeforeTaxAttributableToParent-0.8-1.0-0.6-1.52.40.1-0.4

us-gaap:AccumulatedTranslationAdjustment


Oci
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value8.5436.466251018-43.3079.17
Percentage of OciBeforeReclassificationsBeforeTaxAttributableToParent105.068.299.5102.8117.070.172.3

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent


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
Value8.5436.466251018-41.9589.17-6.177138.54-30.79.832-4.931-16.551-2.90923155.823-2.978-1.147-1.17845
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-349000.03108000.0535000.0-123000.0-3000000.0-18382000.03495000.0-3865000.0-9014000.0-5017000.0-9269000.0-310000.00000
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-2494000.0-2448000.0-2484000.0-2468000.0-2130000.0-1098000.0-966000.0-614000.0-397000.0-358000.0-806000.0000
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


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
Value1011271217-59.30613-9.4195.0764.024-37.8668.59-4.942-16.746-2.93923156.051-2.782-1.311-1.17845
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value2.1455.5563.0192.345-0.87-17.2844.461
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent20.246.510.818.9-5.029.132.7

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value-0.048-0.074-0.119-0.1210.296-0.064-0.036
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent-0.5-0.6-0.4-1.01.70.1-0.3

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value10111217-59.306-9.4195.0764.024-37.8668.59-4.942-16.746-2.93923156.051
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedTranslationAdjustment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value8.5436.466251018-41.9589.17
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent80.354.190.382.0103.370.767.2

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value-13000.0-20000.0-98000.0-32000.079000.0-1366000.06000.0
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent1100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1 us-gaap:StatementEquityComponents

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value-13000.0-20000.0-32000.0-32000.079000.0-17000.0-10000.0
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent1100.0100.032.7100.0100.01.2-166.7

us-gaap:AccumulatedTranslationAdjustment


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value000-1349000.00
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent1-0.0-0.00.098.80.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-48000.0-74000.0-119000.0-121000.0296000.0-64000.0-36000.09000.0-236000.0143000.01215000.0-932000.0-11000.0-195000.0-138000.011000.027000.082000.037000.0-164000.000000075000.0102000.0-61000.0860000.0885000.01074000.0-166000.0-549000.0698000.0894000.0-947000.0363000.01491000.0-14000.0-1545000.0754000.0
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherIncreaseDecreaseInEnvironmentalLiabilities

us-gaap:OtherIncreaseDecreaseInEnvironmentalLiabilities


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.170.2751.6483.4432.1373.470.2530.1630.026-0.7742.4480.372-0.111-0.5620.117-0.183-0.2310.102-3.905-0.034-0.22-0.095-9.145-3.0870.5020.385-0.376-1.562-0.608-0.821-1.265-2.024-0.335-0.058-4.905-0.458-2.449-0.646-0.373-1.694-0.513-0.26-2.937-1.498-3.121-0.772
Percentage of OtherIncreaseDecreaseInEnvironmentalLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoncashIncomeExpense


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value-1480000.0-1228000.02268000.0-500000.0-2365000.0-427000.0-564000.02983000.0-996000.0846000.0-299000.0-432000.0-833000.0-1549000.0-198000.0-699000.0-350000.0-139000.0
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForEnvironmentalLiabilities

us-gaap:PaymentsForEnvironmentalLiabilities


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3.5833.0113.5852.7122.6693.4355.8976.672.873.2642.8772.6532.162.4252.8873.9763.1642.9382.7962.922.9363.5183.3575.2415.9285.6048.1154.6873.2574.1863.4886.1354.5025.2913.3584.0462.0651.7222.7682.9873.2242.341.5323.9872.5552.162
Percentage of PaymentsForEnvironmentalLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfFinancingCosts

us-gaap:PaymentsOfFinancingCosts


Payments
Period End2021-06-302021-03-312019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.0090.1370.026100.0893.470.4680.0-0.0281.0194.6190.1081.4170.00.4242.190.00.00.00.00.00.00.00.00.0580.00.1282.3189.4189.6170.0210.00.0210.3432.4715.6280.30.00.00.053
Percentage of PaymentsOfFinancingCosts100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0100.0100.00.00.00.00.00.00.00.00.0100.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.00.0100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value1020000.03719000.0924000.01012000.01171000.02224000.01924000.0525000.02704000.02276000.0700000.0391000.01627000.0548000.0828000.0189000.01111000.01021000.0319000.0621000.0454000.01425000.0132000.0190000.0683000.01154000.0125000.0453000.01465000.0750000.0132000.0430000.0128000.041000.01308000.0388000.01216000.00
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-30
Value4642177.84713325.0756.7611122410380.0
Percentage of PaymentsToAcquireAvailableForSaleSecuritiesDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:PaymentsToAcquireBusinessesGross us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType

us-gaap:PaymentsToAcquireBusinessesGross

clh:HydroChemPSC, us-gaap:SubsequentEvent


Payments
Period End2021-08-03
Value1250
Percentage of PaymentsToAcquireBusinessesGross100.0

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired


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
Value0.0220.0-0.0388.8770.0-0.1160.014140.0273.751204.79535-2.66911-0.1741482334140.0790.0100.06.150.03.80659-0.1970.197128149348.7510.01312032.1520.80.095
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired0.0100.00.0100.0100.00.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireIntangibleAssets

us-gaap:PaymentsToAcquireIntangibleAssets


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1245000.0505000.0166000.0621000.0794000.0448000.01008000.0973000.0791000.01132000.01188000.01394000.0861000.01245000.0269000.0109000.0488000.0751000.0911000.0947000.0461000.0512000.0663000.01545000.01917000.01171000.01076000.02552000.01816000.01075000.02383000.02188000.01444000.0725000.01637000.01456000.0528000.0425000.0571000.01290000.0744000.0322000.0942000.01070000.01606000.0586000.0
Percentage of PaymentsToAcquireIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromDivestitureOfBusinesses

us-gaap:ProceedsFromDivestitureOfBusinesses


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value0.0-0.041-0.1037.8560.00.00.00.00.00.0-0.913-0.052442.0180.0470.00.00.0
Percentage of ProceedsFromDivestitureOfBusinesses0.0100.0100.0100.00.00.00.00.00.00.0100.0100.0100.0100.00.0100.00.00.00.0

us-gaap:ProceedsFromIncomeTaxRefunds

us-gaap:ProceedsFromIncomeTaxRefunds


Proceeds
Period End2020-09-30
Value7700000.0
Percentage of ProceedsFromIncomeTaxRefunds100.0

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromLinesOfCredit


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value0.00.00.01500.00.00.00.00.00.0
Percentage of ProceedsFromLinesOfCredit0.00.00.0100.00.00.00.00.00.00.0

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt


Proceeds
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value502010161215178.68.9097.953.2640.0
Percentage of ProceedsFromSaleOfAvailableForSaleSecuritiesDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ProceedsFromSaleOfProductiveAssets

us-gaap:ProceedsFromSaleOfProductiveAssets


Proceeds
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value4206000.0951000.02150000.01559000.03068000.04321000.03470000.01843000.0798000.0
Percentage of ProceedsFromSaleOfProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment


Proceeds
Period End2021-06-302021-03-312020-06-302020-03-31
Value2275000.01204000.0951000.02150000.0
Percentage of ProceedsFromSaleOfPropertyPlantAndEquipment100.0100.0100.0100.0

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ProvisionForDoubtfulAccounts


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-0.3372.446-0.3081.4354.3064.73.1531.4881.192-3.4258.948-0.525.0862.3032.2662.0551.6451.9350.7042.9752.1561.072-0.8381.0952.3322.2042.1742.1382.5192.0862.6521.6631.7951.8230.4040.4040.2020.2030.1360.2210.1970.2050.88-0.670.3140.519
Percentage of ProvisionForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent


Reclassification
Period End2021-06-302021-03-312020-09-302020-06-302020-03-31
Value-2494000.0-2448000.0-2468000.0-2130000.0-1098000.0
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Reclassification
Period End2021-06-302021-03-312020-09-302020-06-302020-03-31
Value-2494000.0-2448000.0-2468000.0-2130000.0-1098000.0
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RepaymentsOfLinesOfCredit


Repayments
Period End2020-12-312020-09-30
Value0.075
Percentage of RepaymentsOfLinesOfCredit0.0100.0

us-gaap:RepaymentsOfLinesOfCredit us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


Repayments
Period End2020-07-282020-06-292018-12-31
Value757550
Percentage of RepaymentsOfLinesOfCredit0.00.00.0

us-gaap:RepaymentsOfLinesOfCredit us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent


Repayments
Period End2020-07-28
Value75
Percentage of RepaymentsOfLinesOfCredit0.0

us-gaap:RepaymentsOfUnsecuredDebt

us-gaap:RepaymentsOfUnsecuredDebt


Repayments
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-30
Value1.8841.8841.8848461.8841.8844011.01.01042960.00.0
Percentage of RepaymentsOfUnsecuredDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability


Right
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value9.4999.2054.1931117-0.8562.438
Percentage of RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability100.0100.0100.0100.0100.0100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


Right
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value3.4692.305143.7773.806129.691
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue

clh:PerformanceStockAwards


Share
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value-1.121.5864.130.89-0.0555.690.340.4554.64-0.05-0.0256.26
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStock


Share
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value0.17-3.2161.850.350.5354.390.410.9852.65-0.150.5350.97
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue-15.2-203.296.439.3-1060.097.7120.6217.896.4300.0-2650.090.6

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

clh:PerformanceStockAwards


Share
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302013-12-312013-09-302013-06-30
Value058.3000.2470.5300000.031.4054.440-0.09-0.01-0.1055.2954.26
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.0100.00.00.0100.0100.00.00.00.00.0100.0100.00.0100.00.0100.0100.0100.00.0100.0100.0

us-gaap:RestrictedStock


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302014-12-312014-09-302014-06-30
Value0.6487.22-0.31-0.53-21.080.070.433.273.9461.180.6353.43-0.07-0.150.5155.64-0.3-0.15-0.84-0.26-1.1859.0161.85
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.00.00.0-0.90.00.0179.24.60.00.00.00.0-233.3-10.70.0102.20.0166.78400.0260.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue

clh:PerformanceStockAwards


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.06.42.20.00.01.35.20.00.02.90.70.00.00.51.60.00.01.40.60.00.00.40.30.00.00.30.00.00.00.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue0.0100.0100.00.00.0100.0100.00.00.0100.0100.00.00.0100.0100.00.00.0100.0100.00.00.0100.0100.00.00.0100.00.00.00.00.0

us-gaap:RestrictedStock


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value4.94.00.53.14.45.31.54.27.93.21.41.17.01.31.10.54.51.50.41.82.33.80.10.63.03.20.31.55.32.3
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue0.062.522.70.00.0407.728.80.00.0110.3200.00.00.0260.068.80.00.0107.166.70.00.0950.033.30.00.01066.70.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

clh:PerformanceStockAwards


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
Value062.2700055.75-0.090055.770.560054.260.760054.84-1.560061.900054.28
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue0.0100.00.00.00.0100.0100.00.00.0100.0100.00.00.0100.0100.00.00.0100.0100.00.00.0100.00.00.00.0100.0

us-gaap:RestrictedStock


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
Value1.0656.290.30.262.2455.090.020.220.9252.83-0.39-0.042.052.65-0.73-0.28-0.2854.45-0.24-1.12-0.6155.79-0.1-0.64-2.7659.25
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue0.090.40.00.00.098.8-22.20.00.094.7-69.60.00.097.0-96.10.00.099.315.40.00.090.10.00.00.0109.2

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice

clh:PerformanceStockAwards


Share
Period End2021-03-31
Value61.75
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice100.0

us-gaap:RestrictedStock


Share
Period End2021-03-31
Value60.58
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice98.1

us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value42000.078000.035000.058000.059000.017000.0105000.078000.015000.094000.024000.0
Percentage of StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-1020000.0-3719000.0-1012000.0-1171000.0-2224000.0-525000.0-2704000.0-2276000.0-700000.0-391000.0-1627000.0-548000.0-828000.0-189000.0-1111000.0-1021000.0-319000.0-621000.0-454000.0-1425000.0-132000.0-190000.0-683000.0-1154000.0-125000.0-453000.0-2965000.0750000.01330000.0-430000.0-128000.0-41000.0-1308000.0-388000.0-190000.0-1026000.0-2164000.0-90000.0-23000.0-1784000.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-1020000.0-3720000.0-1012000.0-1171000.0-2225000.0-525000.0-2705000.0-2277000.0-700000.0-391000.0-1628000.0-548000.0-828000.0-189000.0-1112000.0-1021000.0-319000.0-621000.0-454000.0-1426000.0-132000.0-190000.0-683000.0-1155000.0-125000.0-453000.0-2966000.0750000.01330000.0-430000.0-128000.0-41000.0-1308000.0-388000.0-190000.0-1026000.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.1100.0100.0100.0100.1100.0100.0100.0100.0100.1100.0100.0100.0100.1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStock


Stock
Period End2021-03-312020-06-302020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value1000.001000.01000.01000.0001000.00001000.000001000.00001000.000
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.0-0.0-0.0-0.1-0.0-0.0-0.0-0.0-0.1-0.0-0.0-0.0-0.1-0.0-0.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value3.3053.486.6622.7863.2915.0213.8345.8096.0664.0873.5623.0773.9344.042.9012.2712.7462.9962.6462.0932.00.4044.2961.852.3542.1062.0622.2782.5572.4652.0371.8872.2591.6191.4752.1412.5492.4061.1261.773
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value3.3053.486.6622.7863.2915.0213.8345.8096.0664.0873.5623.0773.9344.042.9012.2712.7462.9962.6462.0932.00.4044.2961.852.3542.1062.0622.2782.5572.4652.0371.8872.2591.6191.4752.1412.5492.4061.1261.773
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodShares us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedAndRetiredDuringPeriodShares

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-09-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value200000.0300000.0402000.0302000.068000.074000.097000.0178000.0104000.0252000.0280000.0459000.0234000.094000.0120000.0116000.0134000.099000.0104000.078000.0772000.0286000.0286000.0
Percentage of StockRepurchasedAndRetiredDuringPeriodShares100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue


Stock
Period End2021-06-302021-03-312020-09-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value182622175.05.1184.9486.3117.1121424125.56.7965.846.25.15.03.5343716165037141.225
Percentage of StockRepurchasedAndRetiredDuringPeriodValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value182622175.1174.9486.323117.098121424125.466.7955.8556.2135.1354.9973.5333716165037141.225
Percentage of StockRepurchasedAndRetiredDuringPeriodValue100.0100.0100.0100.0100.0100.0100.4100.1100.0100.199.7100.3100.099.3100.0100.3100.2100.799.9100.0100.099.9100.0100.099.9100.0100.0

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-09-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0.0020.0030.0040.0030.0010.00.0010.0020.0010.0020.0030.0040.0030.0010.0010.0010.0010.0010.0010.0010.0070.0030.0030.0110.006
Percentage of StockRepurchasedAndRetiredDuringPeriodValue0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions

us-gaap:UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions


Unrecognized
Period End2020-09-30
Value1100000.0
Percentage of UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions100.0

clh:AccrualForWorkersCompensationComprehensiveGeneralLiabilityAndVehicleLiabilitySelfInsurancePrograms

clh:AccrualForWorkersCompensationComprehensiveGeneralLiabilityAndVehicleLiabilitySelfInsurancePrograms


Accrual
Period End2020-12-312019-12-31
Value6559
Percentage of AccrualForWorkersCompensationComprehensiveGeneralLiabilityAndVehicleLiabilitySelfInsurancePrograms100.0100.0

clh:AccruedCappingClosurePostClosureAndRemedialLiabilitiesCurrent

clh:AccruedCappingClosurePostClosureAndRemedialLiabilitiesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2326262219162326302723252319191923212020242120212625223236312927222124191918151515141418
Percentage of AccruedCappingClosurePostClosureAndRemedialLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

clh:AccruedInsuranceEmployeeMedicalInsuranceCosts

clh:AccruedInsuranceEmployeeMedicalInsuranceCosts


Accrued
Period End2020-12-312019-12-31
Value9.414
Percentage of AccruedInsuranceEmployeeMedicalInsuranceCosts100.0100.0

clh:AirspaceConsumedFromLandfill clh:LongLivedAssetsByName

clh:AirspaceConsumedFromLandfill

clh:Altair


Airspace
Period End2020-12-312019-12-312018-12-31
Value25000.0132000.0127000.0
Percentage of AirspaceConsumedFromLandfill100.0100.0100.0

clh:AnnualAggregateSelfInsuredCorridorRetention

clh:AnnualAggregateSelfInsuredCorridorRetention


Annual
Period End2020-09-30
Value5000000.0
Percentage of AnnualAggregateSelfInsuredCorridorRetention100.0

clh:AnticipatedPaymentForAssetRetirementObligationsAfterYearFive

clh:AnticipatedPaymentForAssetRetirementObligationsAfterYearFive


Anticipated
Period End2020-12-31
Value269
Percentage of AnticipatedPaymentForAssetRetirementObligationsAfterYearFive100.0

clh:AnticipatedPaymentForAssetRetirementObligationsYearFive

clh:AnticipatedPaymentForAssetRetirementObligationsYearFive


Anticipated
Period End2020-12-31
Value5628000.0
Percentage of AnticipatedPaymentForAssetRetirementObligationsYearFive100.0

clh:AnticipatedPaymentForAssetRetirementObligationsYearFour

clh:AnticipatedPaymentForAssetRetirementObligationsYearFour


Anticipated
Period End2020-12-31
Value6868000.0
Percentage of AnticipatedPaymentForAssetRetirementObligationsYearFour100.0

clh:AnticipatedPaymentForAssetRetirementObligationsYearOne

clh:AnticipatedPaymentForAssetRetirementObligationsYearOne


Anticipated
Period End2020-12-31
Value14
Percentage of AnticipatedPaymentForAssetRetirementObligationsYearOne100.0

clh:AnticipatedPaymentForAssetRetirementObligationsYearThree

clh:AnticipatedPaymentForAssetRetirementObligationsYearThree


Anticipated
Period End2020-12-31
Value16
Percentage of AnticipatedPaymentForAssetRetirementObligationsYearThree100.0

clh:AnticipatedPaymentForAssetRetirementObligationsYearTwo

clh:AnticipatedPaymentForAssetRetirementObligationsYearTwo


Anticipated
Period End2020-12-31
Value7816000.0
Percentage of AnticipatedPaymentForAssetRetirementObligationsYearTwo100.0

clh:AnticipatedSelfInsurancePaymentsThereafter

clh:AnticipatedSelfInsurancePaymentsThereafter


Anticipated
Period End2020-12-31
Value8188000.0
Percentage of AnticipatedSelfInsurancePaymentsThereafter100.0

clh:AnticipatedSelfInsurancePaymentsYearFive

clh:AnticipatedSelfInsurancePaymentsYearFive


Anticipated
Period End2020-12-31
Value4990000.0
Percentage of AnticipatedSelfInsurancePaymentsYearFive100.0

clh:AnticipatedSelfInsurancePaymentsYearFour

clh:AnticipatedSelfInsurancePaymentsYearFour


Anticipated
Period End2020-12-31
Value6448000.0
Percentage of AnticipatedSelfInsurancePaymentsYearFour100.0

clh:AnticipatedSelfInsurancePaymentsYearOne

clh:AnticipatedSelfInsurancePaymentsYearOne


Anticipated
Period End2020-12-31
Value22
Percentage of AnticipatedSelfInsurancePaymentsYearOne100.0

clh:AnticipatedSelfInsurancePaymentsYearThree

clh:AnticipatedSelfInsurancePaymentsYearThree


Anticipated
Period End2020-12-31
Value9655000.0
Percentage of AnticipatedSelfInsurancePaymentsYearThree100.0

clh:AnticipatedSelfInsurancePaymentsYearTwo

clh:AnticipatedSelfInsurancePaymentsYearTwo


Anticipated
Period End2020-12-31
Value13
Percentage of AnticipatedSelfInsurancePaymentsYearTwo100.0

clh:AssetsNoncurrentExcludingPropertyPlantAndEquipment

clh:AssetsNoncurrentExcludingPropertyPlantAndEquipment


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1067108210801073109210981119112711451145974983969973965976969974977101497898197799510211000101910271170116111801199117111791207336301292289303250199194190
Percentage of AssetsNoncurrentExcludingPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

clh:CashEquivalentsandMarketableSecuritiesCurrent

clh:CashEquivalentsandMarketableSecuritiesCurrent


Cash
Period End2020-12-312019-12-312018-12-312017-12-31
Value51446040
Percentage of CashEquivalentsandMarketableSecuritiesCurrent100.0100.0100.0100.0

clh:DeferredTaxAssetsClosurePostClosureAndRemedialLiabilities

clh:DeferredTaxAssetsClosurePostClosureAndRemedialLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2826282840374353523135
Percentage of DeferredTaxAssetsClosurePostClosureAndRemedialLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

clh:DeferredTaxAssetsOperatingLeaseLiabilities

clh:DeferredTaxAssetsOperatingLeaseLiabilities


Deferred
Period End2020-12-312019-12-31
Value3840
Percentage of DeferredTaxAssetsOperatingLeaseLiabilities100.0100.0

clh:DeferredTaxAssetsValuationAllowanceDeferredTaxAssetsOfSubsidiary

clh:DeferredTaxAssetsValuationAllowanceDeferredTaxAssetsOfSubsidiary


Deferred
Period End2020-12-312019-12-31
Value1114
Percentage of DeferredTaxAssetsValuationAllowanceDeferredTaxAssetsOfSubsidiary100.0100.0

clh:DeferredTaxAssetsValuationAllowanceForeignNetOperatingLossCarryforwards

clh:DeferredTaxAssetsValuationAllowanceForeignNetOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-31
Value2934
Percentage of DeferredTaxAssetsValuationAllowanceForeignNetOperatingLossCarryforwards100.0100.0

clh:DeferredTaxAssetsValuationAllowanceForeignTaxCredits

clh:DeferredTaxAssetsValuationAllowanceForeignTaxCredits


Deferred
Period End2020-12-312019-12-31
Value1416
Percentage of DeferredTaxAssetsValuationAllowanceForeignTaxCredits100.0100.0

clh:DeferredTaxAssetsValuationAllowanceRealizedAndUnrealizedCapitalLosses

clh:DeferredTaxAssetsValuationAllowanceRealizedAndUnrealizedCapitalLosses


Deferred
Period End2020-12-312019-12-31
Value106.565
Percentage of DeferredTaxAssetsValuationAllowanceRealizedAndUnrealizedCapitalLosses100.0100.0

clh:DeferredTaxAssetsValuationAllowanceStateNetOperatingLossCarryforwards

clh:DeferredTaxAssetsValuationAllowanceStateNetOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-31
Value1010
Percentage of DeferredTaxAssetsValuationAllowanceStateNetOperatingLossCarryforwards100.0100.0

clh:DeferredTaxLiabilitiesNetBeforeValuationAllowance

clh:DeferredTaxLiabilitiesNetBeforeValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value148147143136229222
Percentage of DeferredTaxLiabilitiesNetBeforeValuationAllowance100.0100.0100.0100.0100.0100.0

clh:DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets

clh:DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets


Deferred
Period End2020-12-312019-12-31
Value3840
Percentage of DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets100.0100.0

clh:DiscountReserves

clh:DiscountReserves


Discount
Period End2020-12-31
Value159
Percentage of DiscountReserves100.0

clh:EnergyRelatedInventoryOther

clh:EnergyRelatedInventoryOther


Energy
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value1314131413131313131313121110111111131513141413122517171718179.639204.602
Percentage of EnergyRelatedInventoryOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

clh:EnergyRelatedInventorySuppliesAndDrums

clh:EnergyRelatedInventorySuppliesAndDrums


Energy
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value119118116115112108108104991009794939291908478797875706668687265646161646349
Percentage of EnergyRelatedInventorySuppliesAndDrums100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

clh:FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour

clh:FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour


Finite
Period End2021-06-302021-03-312020-09-30
Value132131152
Percentage of FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour100.0100.0100.0

clh:IntangibleAssetsNetExcludingGoodwillPercent

clh:IntangibleAssetsNetExcludingGoodwillPercent


Intangible
Period End2020-12-312019-12-312018-12-312017-12-31
Value100.01.01.01.0
Percentage of IntangibleAssetsNetExcludingGoodwillPercent100.0100.0100.0100.0

clh:IntangibleAssetsNetExcludingGoodwillPercent us-gaap:StatementGeographical

country:CA


Intangible
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value11.30.1110.1110.1290.1270.1420.1780.1940.126
Percentage of IntangibleAssetsNetExcludingGoodwillPercent11.311.111.112.90.00.00.00.00.0

country:US


Intangible
Period End2020-12-312019-12-312018-12-312017-12-31
Value88.70.8890.8890.871
Percentage of IntangibleAssetsNetExcludingGoodwillPercent88.788.988.987.1

clh:LandfillFinalClosureAndPostClosureLiabilities

clh:LandfillFinalClosureAndPostClosureLiabilities


Landfill
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value4839373230322927262529
Percentage of LandfillFinalClosureAndPostClosureLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

clh:LossContingencyRangeOfLoss clh:ContingenciesByNatureOfContingency

clh:LossContingencyRangeOfLoss

clh:FederalAndStateEnforcementActions


Loss
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value5800000.07600000.07500000.01400000.03800000.03000000.05900000.07100000.0
Percentage of LossContingencyRangeOfLoss100.0100.0100.0100.0100.0100.0100.0100.0

clh:LossContingencyRangeOfPossibleLossMinimum clh:ContingenciesByNatureOfContingency

clh:LossContingencyRangeOfPossibleLossMinimum

clh:FederalAndStateEnforcementActions


Loss
Period End2021-03-312020-12-312020-09-302019-12-31
Value1000000.01000000.0100000.0100000.0
Percentage of LossContingencyRangeOfPossibleLossMinimum100.0100.0100.0100.0

clh:NonLandfillClosureAndPostClosureLiabilities

clh:NonLandfillClosureAndPostClosureLiabilities


Non
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value3936322827242019279.18.9
Percentage of NonLandfillClosureAndPostClosureLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

clh:PrepaidExpensesAndOtherAssetsCurrent

clh:PrepaidExpensesAndOtherAssetsCurrent


Prepaid
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value67484235564656574848564141535775534962733732302818
Percentage of PrepaidExpensesAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

clh:ProbableAirspace

clh:ProbableAirspace


Probable
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value242829313229302926627282528
Percentage of ProbableAirspace100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

clh:PropertyPlantAndEquipmentNetPercent

clh:PropertyPlantAndEquipmentNetPercent


Property
Period End2020-12-312019-12-312018-12-312017-12-31
Value100.01.01.01.0
Percentage of PropertyPlantAndEquipmentNetPercent100.0100.0100.0100.0

clh:PropertyPlantAndEquipmentNetPercent us-gaap:StatementGeographical

country:CA


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value18.30.1980.210.260.2480.2930.3770.4070.419
Percentage of PropertyPlantAndEquipmentNetPercent18.319.821.026.00.00.00.00.00.0

country:US


Property
Period End2020-12-312019-12-312018-12-312017-12-31
Value81.70.8020.790.74
Percentage of PropertyPlantAndEquipmentNetPercent81.780.279.074.0

clh:ReservesToBeProvidedOverRemainingSiteLives

clh:ReservesToBeProvidedOverRemainingSiteLives


Reserves
Period End2020-12-31
Value73
Percentage of ReservesToBeProvidedOverRemainingSiteLives100.0

clh:SelfInsuranceDiscountRate

clh:SelfInsuranceDiscountRate


Self
Period End2020-12-31
Value320000.0
Percentage of SelfInsuranceDiscountRate100.0

clh:UnbilledAccountsReceivableCurrent

clh:UnbilledAccountsReceivableCurrent


Unbilled
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value5955555944515658524254636263354046283641293125413733405035402642343227343029294130161912
Percentage of UnbilledAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

clh:UndiscountedClosureAndPostClosureLiabilities

clh:UndiscountedClosureAndPostClosureLiabilities


Undiscounted
Period End2020-12-31
Value320
Percentage of UndiscountedClosureAndPostClosureLiabilities100.0

clh:UndiscountedSelfInsuranceLiabilities

clh:UndiscountedSelfInsuranceLiabilities


Undiscounted
Period End2020-12-31
Value65
Percentage of UndiscountedSelfInsuranceLiabilities100.0

clh:UnrecognizedTaxBenefitsAndOtherLongTermLiabilitiesNoncurrent

clh:UnrecognizedTaxBenefitsAndOtherLongTermLiabilitiesNoncurrent


Unrecognized
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3223002692772632552542332212222222232982972942932682582602672823062922902552492442462172152152241251241191179291868291
Percentage of UnrecognizedTaxBenefitsAndOtherLongTermLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:EntityNumberOfEmployees dei:LegalEntity, us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType

dei:EntityNumberOfEmployees

clh:HydroChemPSC, clh:HydroChemPSC, us-gaap:SubsequentEvent


Entity
Period End2021-08-03
Value5000.0
Percentage of EntityNumberOfEmployees100.0

us-gaap:AccrualForEnvironmentalLossContingencies

us-gaap:AccrualForEnvironmentalLossContingencies


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value112114114115112110114117118118121120121122124125126126128129130131131143148149155162167168172172171174167130131135135134137137145
Percentage of AccrualForEnvironmentalLossContingencies100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccrualForEnvironmentalLossContingencies clh:ContingenciesByNatureOfContingency

clh:LegalAndAdministrativeProceedings


Accrual
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value24181717181827343426
Percentage of AccrualForEnvironmentalLossContingencies20.916.114.814.414.214.317.920.120.619.7

us-gaap:AccrualForEnvironmentalLossContingencies us-gaap:EnvironmentalExitCostByProperty

clh:ActiveLandfillFacilities


Accrual
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value42444854555972838149
Percentage of AccrualForEnvironmentalLossContingencies36.738.940.143.543.344.746.848.249.036.7

clh:InactiveLandfillFacilities


Accrual
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value63616462646368747178
Percentage of AccrualForEnvironmentalLossContingencies54.954.353.250.450.148.244.243.042.558.0

clh:SuperfundLandfillSites


Accrual
Period End2020-12-31
Value9.602
Percentage of AccrualForEnvironmentalLossContingencies8.4

us-gaap:AccrualForEnvironmentalLossContingencies us-gaap:EnvironmentalRemediationSite

clh:RemedialLiabilitiesForInactiveSites


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value616263625960616364656565656565656663646262636367676868697073748178
Percentage of AccrualForEnvironmentalLossContingencies54.354.454.954.353.255.054.354.254.554.754.054.154.253.252.552.252.350.550.148.348.248.248.246.845.445.544.242.842.243.543.148.858.0

clh:RemedialLiabilitiesForLandfillSites


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value1.8641.8921.8651.8581.8511.8591.8511.8831.8761.8681.8381.8291.821.8091.81.7761.7641.7531.7772.3922.392.3982.3272.6155.1595.1235.425.475.5645.4245.6245.8295.6
Percentage of AccrualForEnvironmentalLossContingencies1.71.71.61.61.61.71.61.61.61.61.51.51.51.51.41.41.41.41.41.91.81.81.81.83.53.43.53.43.33.23.33.54.1

clh:RemedialLiabilitiesIncludingSuperfundForNonLandfillOperations


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value495049505048505151525353535557585860626465656673767681879189929551
Percentage of AccrualForEnvironmentalLossContingencies44.144.043.544.145.243.444.144.243.943.844.544.444.345.346.046.446.348.148.549.949.950.050.051.451.151.152.353.854.553.353.757.437.9

us-gaap:AccrualForEnvironmentalLossContingencies us-gaap:StatementGeographical, us-gaap:EnvironmentalExitCostByProperty

clh:BatonRougeLa, clh:ClosedIncineratorAndLandfill


Accrual
Period End2020-12-312019-12-312018-12-31
Value252223
Percentage of AccrualForEnvironmentalLossContingencies22.319.919.3

clh:BridgeportNj, clh:ClosedIncinerator


Accrual
Period End2020-12-312019-12-312018-12-31
Value171818
Percentage of AccrualForEnvironmentalLossContingencies15.515.915.4

clh:LindenNewJersey, clh:OperatingSolventRecyclingCenter


Accrual
Period End2020-12-312019-12-312018-12-31
Value7.227.3127.487
Percentage of AccrualForEnvironmentalLossContingencies6.36.46.2

clh:MercierQuebec, clh:IdledIncineratorAndLegalProceedings


Accrual
Period End2020-12-312019-12-312018-12-31
Value11109.809
Percentage of AccrualForEnvironmentalLossContingencies9.79.48.1

clh:Various, clh:AllOtherIncineratorsLandfillsWastwaterThreatmentFacilitiesAndServiceCenters


Accrual
Period End2020-12-312019-12-312018-12-31
Value434753
Percentage of AccrualForEnvironmentalLossContingencies37.841.544.3

clh:Various, clh:SuperfundLandfillSites


Accrual
Period End2020-12-31
Value9.602
Percentage of AccrualForEnvironmentalLossContingencies8.4

us-gaap:AccrualForEnvironmentalLossContingenciesDiscount

us-gaap:AccrualForEnvironmentalLossContingenciesDiscount


Accrual
Period End2020-12-31
Value20
Percentage of AccrualForEnvironmentalLossContingenciesDiscount100.0

us-gaap:AccrualForEnvironmentalLossContingenciesGross

us-gaap:AccrualForEnvironmentalLossContingenciesGross


Accrual
Period End2020-12-31
Value134
Percentage of AccrualForEnvironmentalLossContingenciesGross100.0

us-gaap:AccrualForEnvironmentalLossContingenciesUndiscountedDueAfterFifthYear

us-gaap:AccrualForEnvironmentalLossContingenciesUndiscountedDueAfterFifthYear


Accrual
Period End2020-12-31
Value75
Percentage of AccrualForEnvironmentalLossContingenciesUndiscountedDueAfterFifthYear100.0

us-gaap:AccrualForEnvironmentalLossContingenciesUndiscountedDueInFifthYear

us-gaap:AccrualForEnvironmentalLossContingenciesUndiscountedDueInFifthYear


Accrual
Period End2020-12-31
Value6526000.0
Percentage of AccrualForEnvironmentalLossContingenciesUndiscountedDueInFifthYear100.0

us-gaap:AccrualForEnvironmentalLossContingenciesUndiscountedDueInFourthYear

us-gaap:AccrualForEnvironmentalLossContingenciesUndiscountedDueInFourthYear


Accrual
Period End2020-12-31
Value9073000.0
Percentage of AccrualForEnvironmentalLossContingenciesUndiscountedDueInFourthYear100.0

us-gaap:AccrualForEnvironmentalLossContingenciesUndiscountedDueInSecondYear

us-gaap:AccrualForEnvironmentalLossContingenciesUndiscountedDueInSecondYear


Accrual
Period End2020-12-31
Value19
Percentage of AccrualForEnvironmentalLossContingenciesUndiscountedDueInSecondYear100.0

us-gaap:AccrualForEnvironmentalLossContingenciesUndiscountedDueInThirdYear

us-gaap:AccrualForEnvironmentalLossContingenciesUndiscountedDueInThirdYear


Accrual
Period End2020-12-31
Value11
Percentage of AccrualForEnvironmentalLossContingenciesUndiscountedDueInThirdYear100.0

us-gaap:AccrualForEnvironmentalLossContingenciesUndiscountedDueWithinOneYear

us-gaap:AccrualForEnvironmentalLossContingenciesUndiscountedDueWithinOneYear


Accrual
Period End2020-12-31
Value12
Percentage of AccrualForEnvironmentalLossContingenciesUndiscountedDueWithinOneYear100.0

us-gaap:AccruedCappingClosurePostClosureAndEnvironmentalCosts

us-gaap:AccruedCappingClosurePostClosureAndEnvironmentalCosts


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value9.75211137.1465.7084.3337.2839.89613129.5929.5766.5145.5196.4444.0776.7456.0196.226.0578.0437.1947.2295.4037.6938.2724.9993.8396.2527.6295.8847.5125.7323.6838.7916.9216.4075.5383.8855.0866.3135.0615.8497.305
Percentage of AccruedCappingClosurePostClosureAndEnvironmentalCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedCappingClosurePostClosureAndEnvironmentalCostsNoncurrent

us-gaap:AccruedCappingClosurePostClosureAndEnvironmentalCostsNoncurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value8379747776766864626260575858545553545256515049474442454643404139404145292928302728293228
Percentage of AccruedCappingClosurePostClosureAndEnvironmentalCostsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedEnvironmentalLossContingenciesCurrent

us-gaap:AccruedEnvironmentalLossContingenciesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value141512151311161717151315161413151615131416141316181617282924232016171512131311109.3139.78.66911
Percentage of AccruedEnvironmentalLossContingenciesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedEnvironmentalLossContingenciesNoncurrent

us-gaap:AccruedEnvironmentalLossContingenciesNoncurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value9899102100999898100101103107105104108111110109111114114114117118126130132138133138144148151154156151117118121124124127128128134
Percentage of AccruedEnvironmentalLossContingenciesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedInsuranceCurrent

us-gaap:AccruedInsuranceCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value787677777271746967647072686357595856635957545555505658656262575454544822242221212019
Percentage of AccruedInsuranceCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value404444414442383736374432342927282627292828283130322625222120181714131111111312141518238.255
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligation

us-gaap:AssetRetirementObligation


Asset
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value93918784828075747574696765646159596058625958565351515050494847474645543635343432343835
Percentage of AssetRetirementObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligation clh:ClosureAndPostClosureLiabilities

clh:LandfillRetirementLiability


Asset
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value50494845454339414341373635343231323130343333322928292929292827282827262625242522252928
Percentage of AssetRetirementObligation54.054.155.154.454.654.652.155.656.756.454.153.953.653.553.152.653.852.252.554.857.057.056.955.855.158.759.059.259.559.358.659.961.360.849.173.072.572.973.970.573.276.978.4

clh:NonLandfillRetirementLiability


Asset
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value42413938373636323232323130292828272827282524242323212020201919191817279.8759.7659.2329.1179.5859.348.9237.74
Percentage of AssetRetirementObligation46.045.944.945.645.445.447.944.443.343.645.946.146.446.546.947.446.247.847.545.243.043.043.144.244.941.341.040.840.540.741.440.138.739.250.927.027.527.126.129.526.823.121.6

us-gaap:CapitalizedContractCostNet

us-gaap:CapitalizedContractCostNet


Capitalized
Period End2020-12-312019-12-31
Value2221
Percentage of CapitalizedContractCostNet100.0100.0

us-gaap:DebtInstrumentCarryingAmount

us-gaap:DebtInstrumentCarryingAmount


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312011-12-31
Value156015621564156616431720157215741575157715791631163716381639164016411645164516451645164513951395270
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

clh:SeniorUnsecuredNotesdue2027, us-gaap:UnsecuredDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value5455455455455455455455450.0
Percentage of DebtInstrumentCarryingAmount34.934.934.834.833.231.734.734.60.0

clh:SeniorUnsecuredNotesdue2029, us-gaap:UnsecuredDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value3003003003003003003003000.0
Percentage of DebtInstrumentCarryingAmount19.219.219.219.218.317.419.119.10.0

clh:TermLoanAgreement, us-gaap:SecuredDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value7157177197217237257277297307327347363923933943953960.0
Percentage of DebtInstrumentCarryingAmount45.945.946.046.144.042.246.346.346.446.446.545.123.924.024.024.124.10.0

us-gaap:DebtInstrumentInterestRateEffectivePercentage

us-gaap:DebtInstrumentInterestRateEffectivePercentage


Debt
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-08-02
Value4.674.674.674.670.04670.0467
Percentage of DebtInstrumentInterestRateEffectivePercentage100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentInterestRateEffectivePercentage us-gaap:DebtInstrument, us-gaap:LongtermDebtType

clh:TermLoanAgreement, us-gaap:SecuredDebt


Debt
Period End2020-12-312019-12-312017-09-30
Value1.90.03550.0427
Percentage of DebtInstrumentInterestRateEffectivePercentage40.776.00.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet


Debt
Period End2021-06-302021-03-312020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1314141814131112
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredFinanceCostsCurrentNet

us-gaap:DeferredFinanceCostsCurrentNet


Deferred
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value201821212122201819202020202119181921191819191819181716161717166.8886.9957.2735.7875.9035.8316.2896.3596.8915.192
Percentage of DeferredFinanceCostsCurrentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredFinanceCostsNet


Deferred
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value151617181812131415121213141411111213131214
Percentage of DeferredFinanceCostsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value337333276259380381387384
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsDerivativeInstruments

us-gaap:DeferredTaxAssetsDerivativeInstruments


Deferred
Period End2020-12-312019-12-31
Value106.252
Percentage of DeferredTaxAssetsDerivativeInstruments100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value505043464641467792232.246
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsDomestic

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsDomestic


Deferred
Period End2020-12-31
Value16
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsDomestic100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsForeign

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsForeign


Deferred
Period End2020-12-31
Value151
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsForeign100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal


Deferred
Period End2020-12-31
Value193
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value5.553107.0673.2580.5557.4213.6222.171.1214.4214.359
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1416161725252929311917
Percentage of DeferredTaxAssetsTaxCreditCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsForeign

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsForeign


Deferred
Period End2020-12-31
Value14
Percentage of DeferredTaxAssetsTaxCreditCarryforwardsForeign100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value117.1557.7741.9032.7475.42512114.9615.0114.75
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value3040000.02435000.03440000.02268000.01993000.0615000.0489000.01159000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1617151518121319
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value108.949107.41711128.9217.377.4514.8038.191
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value9598103107161159155159
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPrepaidExpenses

us-gaap:DeferredTaxLiabilitiesPrepaidExpenses


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value9.669.6949.1878.08110.0
Percentage of DeferredTaxLiabilitiesPrepaidExpenses100.0100.0100.0100.0100.00.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value19418416414420722123222522011464
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilities

us-gaap:DerivativeLiabilities


Derivative
Period End2020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value3338202522138.8
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilitiesCurrent

us-gaap:DerivativeLiabilitiesCurrent


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value252833363820
Percentage of DerivativeLiabilitiesCurrent100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value947881604843726954467768564855524541344650403549623959596249607164527041423656473944
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

clh:PerformanceStockAwards


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-31
Value1.82.95.15.71.61.22.84.53.44.63.22.11.32.02.51.50.91.01.50.20.60.60.60.93.20.30.40.02.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:RestrictedStock


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-31
Value1716192216172024212324282728242723181717231211131514131915
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized988.9572.4388.2386.01031.21491.7735.7533.3626.5502.2778.11357.12084.61425.0964.01853.32644.41850.01153.38600.03866.72066.71916.71466.7487.54666.73400.00.0780.0

us-gaap:EnergyRelatedInventoryChemicals

us-gaap:EnergyRelatedInventoryChemicals


Energy
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value10109.7639.9739.9051010109.29.239.1889.1678.688.5758.8658.5668.5028.7569.0268.8689.742109.6279.3559.2829.6399.955101112119.3980.433
Percentage of EnergyRelatedInventoryChemicals100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiability


Finance
Period End2020-12-31
Value60
Percentage of FinanceLeaseLiability100.0

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityCurrent


Finance
Period End2020-12-312019-12-31
Value5840000.0801000.0
Percentage of FinanceLeaseLiabilityCurrent100.0100.0

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityNoncurrent


Finance
Period End2020-12-312019-12-31
Value5534
Percentage of FinanceLeaseLiabilityNoncurrent100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDue


Finance
Period End2020-12-31
Value73
Percentage of FinanceLeaseLiabilityPaymentsDue100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive


Finance
Period End2020-12-31
Value31
Percentage of FinanceLeaseLiabilityPaymentsDueAfterYearFive100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths


Finance
Period End2020-12-31
Value8407000.0
Percentage of FinanceLeaseLiabilityPaymentsDueNextTwelveMonths100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive


Finance
Period End2020-12-31
Value7573000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearFive100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour


Finance
Period End2020-12-31
Value8248000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearFour100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree


Finance
Period End2020-12-31
Value8281000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearThree100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo


Finance
Period End2020-12-31
Value8972000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearTwo100.0

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount


Finance
Period End2020-12-31
Value12
Percentage of FinanceLeaseLiabilityUndiscountedExcessAmount100.0

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseRightOfUseAsset


Finance
Period End2020-12-312019-12-31
Value6032
Percentage of FinanceLeaseRightOfUseAsset100.0100.0

us-gaap:FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization us-gaap:PropertyPlantAndEquipmentByType

us-gaap:FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization

clh:BuildingsAndImprovementIncludingFinanceLeasesROUAssets


Finance
Period End2020-09-302020-06-302019-12-31
Value8.08.031
Percentage of FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization100.0100.0100.0

clh:VehiclesIncludingFinanceLeaseROUAssets


Finance
Period End2020-09-302020-06-302019-12-31
Value43372.4
Percentage of FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization547.5470.07.7

us-gaap:BuildingAndBuildingImprovements


Finance
Period End2020-12-312019-12-31
Value8.931
Percentage of FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization0.0100.0

us-gaap:Equipment


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value9.39.49.39.13.3
Percentage of FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization0.00.00.0113.841.2

us-gaap:Vehicles


Finance
Period End2021-06-302021-03-312020-12-312019-12-31
Value6656472.4
Percentage of FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization0.00.00.07.7

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent


Finance
Period End2020-12-312019-12-31
Value3.574.97
Percentage of FinanceLeaseWeightedAverageDiscountRatePercent100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3233403413393303193283173102992882882782712642552432322232142061961831751681581521441381271191101019386858076726867636048
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

clh:Permits


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
Value999795929087878483817978767574727069676664636160595855545351504948474648474645444442
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization30.628.527.827.327.327.526.626.726.827.127.527.227.527.828.128.429.029.730.230.931.232.133.434.335.336.636.437.438.640.642.745.047.550.453.757.259.460.762.965.066.370.0

us-gaap:CustomerRelationships


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
Value2072072112132071992072001951871791781701651581511431341271201151089993888177726659524639332725212017151410
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization64.061.162.062.962.862.663.463.162.862.562.261.961.360.760.059.358.657.857.156.255.955.254.353.652.651.451.149.948.546.544.341.939.236.132.229.427.426.024.322.220.917.2

us-gaap:OtherIntangibleAssets


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
Value17353433323133323231293131313131302928272624222120191918171615141312121110109.2658.7288.5637.785
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization5.310.310.29.89.99.810.110.210.410.510.310.911.211.511.912.312.412.512.712.812.812.712.312.112.112.012.512.712.912.913.013.113.313.514.113.413.313.312.812.712.812.8

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive


Finite
Period End2020-12-31
Value130
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value30303029
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear


Finite
Period End2021-06-302021-03-312020-09-30
Value15227.841
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive


Finite
Period End2020-12-31
Value23
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value23232423
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value24242525
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value25252929
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0100.0100.0100.0

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
Value574596605609608603624621621616608615611613610609603601599599575576567570580556558562567560564563541545543237218215212209194175
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

clh:Permits


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
Value186184183182182181184182182180177177175174174174173172171170162164161161163161156157158156157157146149148114109107106106105103
Percentage of FiniteLivedIntangibleAssetsGross32.430.930.429.930.030.029.529.429.329.329.228.828.728.528.628.628.728.728.628.428.228.528.428.328.129.128.128.028.027.927.928.027.127.427.448.450.050.050.450.854.559.1

us-gaap:CustomerRelationships


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
Value36637238238838838640140040139739340039940039939839539439338937937937437738436337037337737437737736837237298878483826958
Percentage of FiniteLivedIntangibleAssetsGross63.962.563.163.863.863.964.364.564.664.664.765.065.265.365.465.465.665.565.664.965.965.866.066.166.365.466.366.466.666.966.967.068.168.368.641.639.939.339.539.236.033.3

us-gaap:OtherIntangibleAssets


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
Value213939383736383738373737373836363434344033323131323031313029292825232223222321201813
Percentage of FiniteLivedIntangibleAssetsGross3.76.66.56.36.26.16.16.16.16.16.16.16.16.26.05.95.75.75.76.75.95.75.55.65.65.55.65.65.45.25.25.04.84.34.110.010.110.810.19.99.67.6

us-gaap:IntangibleAssetsGrossExcludingGoodwill

us-gaap:IntangibleAssetsGrossExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value697720728732730726747743744738730739734736734733726723721722698699690694702678682686691684689
Percentage of IntangibleAssetsGrossExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestPayableCurrent

us-gaap:InterestPayableCurrent


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value199.286199.179199.22421103.952143.931412181218152121212121201720172017201720172017207.605155.716155.222157.826
Percentage of InterestPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateCashFlowHedgeLiabilityAtFairValue

us-gaap:InterestRateCashFlowHedgeLiabilityAtFairValue


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value252833363920
Percentage of InterestRateCashFlowHedgeLiabilityAtFairValue100.0100.0100.0100.0100.0100.0

us-gaap:InventoryCrudeOilProductsAndMerchandise

us-gaap:InventoryCrudeOilProductsAndMerchandise


Inventory
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value77777675757067707268595857575552574636333539376267625959636459771.231
Percentage of InventoryCrudeOilProductsAndMerchandise100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2020-12-31
Value45
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0

us-gaap:LettersOfCreditOutstandingAmount

us-gaap:LettersOfCreditOutstandingAmount


Letters
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-312010-12-31
Value1121211201231421411461471531531301301321321341241251261321421401451441441441401341101121481401328286
Percentage of LettersOfCreditOutstandingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity


Line
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value28727026424913580229231217209235194244237217238225194195201190156178232242209238262287251259
Percentage of LineOfCreditFacilityRemainingBorrowingCapacity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtFairValue

us-gaap:LongTermDebtFairValue


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312012-09-302012-06-302012-03-312011-12-31
Value160016001600160017001700160016001600820527541538
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LossContingencyAccrualAtCarryingValue

us-gaap:LossContingencyAccrualAtCarryingValue


Loss
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value313029292323262424232521211919192021222021202130302933424442414142393830303130292929
Percentage of LossContingencyAccrualAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LossContingencyAccrualAtCarryingValue clh:ContingenciesByNatureOfContingency

clh:FederalAndStateEnforcementActions


Loss
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value8.26.35.85.85.86.47.65.96.16.27.54.84.62.11.41.03.14.23.82.62.42.23.06.66.25.75.99.69.26.77.84.32.83.43.8
Percentage of LossContingencyAccrualAtCarryingValue25.820.919.519.424.727.129.224.625.326.129.522.021.310.67.35.214.919.217.312.411.410.513.722.020.319.117.622.820.716.018.511.09.311.112.3

clh:LegalAndAdministrativeProceedings


Loss
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value2323242417171818181717171717171817171818181818232424273235333435343434272727262627
Percentage of LossContingencyAccrualAtCarryingValue74.279.180.580.675.372.970.875.474.773.970.578.078.789.492.794.885.180.882.787.688.689.586.378.079.780.982.477.279.379.983.084.081.589.089.490.788.987.788.191.192.9

us-gaap:MarketableSecurities

us-gaap:MarketableSecurities


Marketable
Period End2020-12-312019-12-31
Value5142
Percentage of MarketableSecurities100.0100.0

us-gaap:MarketableSecurities us-gaap:FinancialInstrument

us-gaap:CorporateDebtSecurities


Marketable
Period End2020-12-312019-12-31
Value2226
Percentage of MarketableSecurities44.362.9

us-gaap:USTreasurySecurities


Marketable
Period End2020-12-312019-12-31
Value2812
Percentage of MarketableSecurities55.729.2

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2020-12-312019-12-31
Value4.895.29
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value225222172174210420522005
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization100.0100.0100.0100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value153115271525153915531588
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization100.0100.0100.0100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Property
Period End2021-06-302021-03-312020-12-312019-12-31
Value911049093
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization6.06.85.95.9

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, clh:EnvironmentalServices


Property
Period End2020-12-312019-12-31
Value879939
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization57.659.1

us-gaap:OperatingSegments, clh:EnvironmentalServicesSegment


Property
Period End2021-06-302021-03-312020-12-31
Value106810561068
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization69.869.170.1

us-gaap:OperatingSegments, clh:SafetyKleen


Property
Period End2020-12-312019-12-31
Value555555
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization36.435.0

us-gaap:OperatingSegments, clh:SafetyKleenSustainabilitySolutionsSegment


Property
Period End2021-06-302021-03-312020-12-31
Value371367366
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization24.224.124.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization us-gaap:StatementGeographical

country:CA


Property
Period End2020-12-312019-12-31
Value278314
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization18.319.8

country:US


Property
Period End2020-12-312019-12-31
Value12461273
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization81.780.2

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value378337453699364436063593
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization100.0100.0100.0100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization us-gaap:PropertyPlantAndEquipmentByType

clh:BuildingsAndImprovemens


Property
Period End2021-06-302021-03-312020-12-31
Value523514509
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization13.813.713.8

clh:BuildingsAndImprovementIncludingFinanceLeasesROUAssets


Property
Period End2020-09-302020-06-302019-12-31
Value502499499
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization13.813.913.9

clh:CampEquipment