HL


Line plots across dimensions of each concept
Tables

Table of contents



us-gaap:CommonStockValue

us-gaap:CommonStockSharesAuthorized

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ProductOrService
us-gaap:StatementBusinessSegments

us-gaap:CostOfRevenue

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostDepreciationAmortizationAndDepletion
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:GrossProfit

us-gaap:OperatingExpenses

us-gaap:ResearchAndDevelopmentExpense

us-gaap:GeneralAndAdministrativeExpense
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:OperatingIncomeLoss
us-gaap:StatementBusinessSegments

us-gaap:InterestExpense
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:InterestExpenseDebt

us-gaap:InterestPaidNet

us-gaap:OtherNonoperatingIncomeExpense
us-gaap:AwardType
us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:NonoperatingIncomeExpense

us-gaap:IncomeTaxExpenseBenefit
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:NetIncomeLoss
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems
us-gaap:StatementEquityComponents

us-gaap:ComprehensiveIncomeNetOfTax
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

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

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:AccountsReceivableNetCurrent

us-gaap:InventoryFinishedGoods

us-gaap:OtherAssetsCurrent

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:LongTermInvestments
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
us-gaap:ConsolidationItems

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:EquitySecuritiesFvNi

us-gaap:LiabilitiesCurrent
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent

us-gaap:TaxesPayableCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherLiabilitiesCurrent
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongTermDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:LongTermDebtAndCapitalLeaseObligations
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:DeferredIncomeTaxLiabilitiesNet
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:TreasuryStockValue

us-gaap:NetCashProvidedByUsedInOperatingActivities
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:NetCashProvidedByUsedInOperatingActivities
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:NetIncomeLoss
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems
us-gaap:StatementEquityComponents

us-gaap:DepreciationDepletionAndAmortization

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInInventories

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:ShareBasedCompensation

us-gaap:AmortizationOfFinancingCosts

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:PaymentsOfDividends
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:PaymentsOfDividendsCommonStock
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:DebtInstrument, us-gaap:SubsequentEventType
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
us-gaap:AwardType, us-gaap:Vesting

us-gaap:DeferredTaxLiabilities
us-gaap:IncomeTaxAuthority, us-gaap:IncomeTaxAuthorityName
us-gaap:Dividends
hl:AnnualDividendPerShare

hl:CostOfGoodsSoldBeforeDepreciationDepletionAndAmortization
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

hl:EmployeeLaborStrikeRelatedCosts

hl:Exploration

hl:ExplorationAndPredevelopmentCosts
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

hl:FinanceLeaseLiabilityAndRightofUseAssetsAdditions

hl:FoundationGrantExpense

hl:IncreaseDecreaseInAccruedReclamationAndClosureCostsAndOtherNonCurrentLiabilities

hl:NoncashActivityRecognitionOfOperatingLeaseLiabilitesAndRightofuseAssets

hl:Predevelopment
us-gaap:Dividends
hl:QuarterlyDividendPerShare

hl:RestrictedStockUnitDistributions
us-gaap:StatementEquityComponents

hl:RestrictedStockUnitDistributionsShares

hl:RevenueExpenseFromContractWithCustomerIncludingAssessedTax
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

hl:SalesRevenueGoodsExcludingGainLossOnForwardContracts
us-gaap:ProductOrService
us-gaap:StatementGeographical

hl:SmelterAndRefiningCharges

hl:StockIssuedDuringPeriodShares401kMatch

hl:StockIssuedDuringPeriodValue401kMatch
us-gaap:StatementEquityComponents

us-gaap:BusinessCombinationAcquisitionRelatedCosts
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:CommonStockDividendsPerShareDeclared
us-gaap:Range
us-gaap:ConcentrationRiskByBenchmark, us-gaap:StatementBusinessSegments
us-gaap:ConcentrationRiskPercentage1
us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

us-gaap:CurrentFederalTaxExpenseBenefit

us-gaap:CurrentForeignTaxExpenseBenefit

us-gaap:CurrentIncomeTaxExpenseBenefit
us-gaap:Range, us-gaap:CreditFacility, us-gaap:VariableRate
us-gaap:DebtInstrumentBasisSpreadOnVariableRate1

us-gaap:DeferredFederalIncomeTaxExpenseBenefit

us-gaap:DeferredForeignIncomeTaxExpenseBenefit

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
us-gaap:SubsequentEventType
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:DerivativeGainLossOnDerivativeNet
us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeLossOnDerivative
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeNonmonetaryNotionalAmountMass

us-gaap:DividendsCommonStock
us-gaap:StatementEquityComponents

us-gaap:DividendsPreferredStock

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

us-gaap:EnvironmentalExpenseAndLiabilities

us-gaap:EnvironmentalRemediationExpense

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss

us-gaap:FinanceLeaseInterestExpense

us-gaap:FinanceLeaseRightOfUseAssetAmortization

us-gaap:ForeignCurrencyTransactionGainLossBeforeTax

us-gaap:ForeignCurrencyTransactionGainLossRealized

us-gaap:GainLossOnDispositionOfAssets

us-gaap:GainLossOnSaleOfDerivatives
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:GainLossOnSaleOfPropertyPlantEquipment
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:IncomeLossFromEquityMethodInvestments
us-gaap:ConsolidationItems

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInAccruedSalaries

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInPropertyAndOtherTaxesPayable

us-gaap:InventoryWriteDown
us-gaap:Range, us-gaap:CreditFacility
us-gaap:LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
us-gaap:IncomeStatementLocation
us-gaap:NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent

us-gaap:OperatingLeaseExpense

us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems
us-gaap:StatementEquityComponents

us-gaap:OtherCostAndExpenseOperating

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherOperatingIncomeExpenseNet
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:PaymentsForProceedsFromOtherInvestingActivities
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:PaymentsOfDebtIssuanceCosts
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:DebtInstrument, us-gaap:SubsequentEventType

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:ProceedsFromIssuanceOfDebt
us-gaap:DebtInstrument, us-gaap:SubsequentEventType

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:RepaymentsOfDebt

us-gaap:RepaymentsOfLongTermCapitalLeaseObligations

us-gaap:RepaymentsOfLongTermDebtAndCapitalSecurities
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:AwardType, us-gaap:Vesting
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage

us-gaap:StockIssuedDuringPeriodSharesEmployeeBenefitPlan

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:StockIssuedDuringPeriodSharesTreasuryStockReissued
us-gaap:CounterpartyName

us-gaap:StockIssuedDuringPeriodValueEmployeeBenefitPlan
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardGross
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:TreasuryStockReissuedAtLowerThanRepurchasePrice
us-gaap:StatementEquityComponents
us-gaap:DerivativeInstrumentRisk
us-gaap:UnderlyingDerivativeMass

us-gaap:UnrealizedGainLossOnInvestments
us-gaap:CreditFacility, us-gaap:SubsequentEventType
hl:AmountOfNewDebtRaisedAfterWhichDollarForDollarReductionInLineOfCreditWillTakeEffect

hl:CommonStockSharesIssuedLessTreasuryShares
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
hl:DebtInstrumentNumberOfIssuanceInstallments
us-gaap:DebtInstrument, us-gaap:SubsequentEventType
us-gaap:CreditFacility
hl:LeverageRatio
us-gaap:CreditFacility, us-gaap:SubsequentEventType
us-gaap:StatementScenario, us-gaap:CreditFacility
us-gaap:ProductOrService
hl:MetalsContainedInConcentrates
us-gaap:StatementBusinessSegments
hl:OpenPurchaseOrders

hl:OtherCurrentAssets
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

hl:OtherNonCurrentAssets
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems

hl:OtherNonCurrentLiabilities
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:AccruedReclamationCostsCurrent
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:AvailableForSaleSecuritiesEquitySecurities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:CertificatesOfDepositAtCarryingValue
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentFaceAmount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:DebtInstrument, us-gaap:SubsequentEventType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentUnamortizedDiscount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

us-gaap:DeferredIncomeTaxAssetsNet
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsCurrentFiscalYear
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:DepositsMoneyMarketDeposits
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeAssets
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeAssetsCurrent
us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType
us-gaap:DerivativeAveragePriceRiskOptionStrikePrice
us-gaap:Range, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:StatementBusinessSegments
us-gaap:DerivativeForwardExchangeRate1
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeLiabilities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:DerivativeLiabilitiesCurrent
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeLiabilitiesNoncurrent
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:StatementBusinessSegments
us-gaap:DerivativeNotionalAmount
us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:StatementBusinessSegments
us-gaap:DerivativeNumberOfInstrumentsHeld

us-gaap:EmployeeRelatedLiabilitiesCurrent
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
us-gaap:AwardType, us-gaap:Vesting

us-gaap:EquitySecuritiesFvNiCost

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseRightOfUseAsset
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:ForeignCurrencyContractAssetFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:ForeignCurrencyContractsLiabilityFairValueDisclosure

us-gaap:IncomeTaxesReceivable

us-gaap:InterestPayableCurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue
us-gaap:CreditFacility
us-gaap:LettersOfCreditOutstandingAmount
us-gaap:OtherCommitments
us-gaap:FairValueByMeasurementFrequency
us-gaap:LiabilitiesFairValueDisclosure
us-gaap:StatementScenario, us-gaap:CreditFacility
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

us-gaap:LongTermLineOfCredit

us-gaap:MineReclamationAndClosingLiabilityNoncurrent
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:OperatingLeaseLiability

us-gaap:OtherInventorySupplies

us-gaap:OtherReceivables
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:PreferredStockSharesOutstanding

us-gaap:PrepaidTaxes
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:RelatedPartyTransactionDueFromToRelatedParty
us-gaap:ConsolidationItems

us-gaap:RestrictedCashAndCashEquivalentsNoncurrent

us-gaap:SeniorLongTermNotes

us-gaap:TreasuryStockShares

Tables

  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302010-09-302010-06-30
us-gaap:CommonStockValue ███▇▇▇▇▇▄▄▄▄▄▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▁▁▁▁▁▁133.699132.381132.292124.133123.701122.052121.956121.283101.643101.29100.926100.886100.73999.97399.80699.75997.20796.21595.21995.11494.77193.10692.38292.26187.51685.94385.89685.8985.8971.571.49971.49671.49671.4270.003NANANA
us-gaap:CommonStockSharesAuthorized █████████████▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁750.0750.0750.0750.0750.0750.0750.0750.0750.0750.0750.0750.0750.0500.0500.0500.0500.0500.0500.0500.0500.0500.0500.0500.0500.0500.0500.0500.0500.0500.0500.0500.0500.0500.0500.0500.0NANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁525.243523.215NA489.971486.065482.829NA452.636403.61401.923NA401.258396.1780.398149NA389.918387.512379.022NA377.508371.295369.691NA362.262344.216350.018NA342.638303.566297.164NA285.492295.16NA295.0295.756270.508266.374
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁525.243523.215NA489.971486.065482.829NA452.636400.619399.322NA398.848396.1780.39537NA387.578383.79379.022NA377.508371.295368.789NA359.472344.216342.666NA342.638303.566285.171NA285.492285.312NA279.541279.347256.095248.549
us-gaap:EarningsPerShareBasic ▁▁▁▁▁▁▁▁▁▁▁▁▁█▁▁▁-3e-08-3e-08-1.0000000000000008e-08-4e-08-1.0000000000000001e-07-5.0000000000000004e-08-5e-08-5.0000000000000004e-083e-082e-08-6.999999999999999e-080.0-6e-087e-054.999999999999999e-087e-086e-08NA-1.6e-07-3e-08-7e-083e-085.0000000000000004e-081e-08-4e-083e-08-9.999999999999995e-09-3e-08-8e-084e-080.00.01e-087.000000000000006e-082.0000000000000002e-071.2e-076e-086e-08
us-gaap:EarningsPerShareDiluted ▁▁▁▁▁▁▁▁▁▁▁▁▁█▁▁▁-3e-08-3e-08-1.0000000000000008e-08-4e-08-1.0000000000000001e-07-5.0000000000000004e-08-5e-08-5.0000000000000004e-083e-082e-08-6.999999999999999e-080.0-6e-087e-054.999999999999999e-087e-086e-08NA-1.6e-07-3e-08-7e-083e-085.0000000000000004e-081e-08-4e-083e-08-9.999999999999995e-09-3e-08-8e-084e-080.00.01e-086e-081.9e-071.1e-076e-085.0000000000000004e-08
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302010-09-302010-06-30
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax ▆▅█▆▅▆▅▅▆▅▆▅▅▅▆▇▆▅▅▄▄▅▅▅▅▅▅▄▄▃▄▄▃▄▅▁▅▁166.355136.925224.945161.532134.172152.617136.52143.649147.259139.709160.113140.839134.279142.544164.245179.393171.302131.017115.337104.941104.197119.092121.985135.507117.502125.787114.18106.62985.3376.4581.181.87167.019102.867120.5430.049115.8476.351
us-gaap:CostOfRevenue ▃▃█▄▅▅▄▄▂▁▂▁▁▂132.276125.553199.627146.652154.415149.173137.785137.073112.257100.923113.80397.876103.072107.628NANA112.85100.195103.602107.50294.73399.21999.778113.48498.774103.54499.44985.94380.21950.83247.06344.56243.05153.04152.73850.06961.32350.565
us-gaap:CostOfGoodsAndServicesSold ▃▃█▄▅▅▄▄▂▁▂▁▁▂132.276125.553199.627146.652154.415149.173137.785137.073112.257100.923113.80397.876103.072107.628NANA112.85100.195103.602107.50294.73399.21999.778113.48498.774103.54499.44985.94380.21950.83247.06344.56243.05153.04152.73850.06961.32350.565
us-gaap:CostDepreciationAmortizationAndDepletion ▄▄█▆▆▄▂▅▂▁▃▂▁▂39.42339.66660.4850.77449.47738.78730.70943.46431.81728.05433.61329.51825.56928.952NANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:GrossProfit ▅▄▅▄▁▃▃▃▅▆▆▆▅▅▆▇▇▅▄▂▃▄▄▄▄▄▄▄▃▅▅▆▅▇██▇▆34.07911.37225.31814.88-20.2433.444-1.2656.57635.00238.78647.22643.63731.20734.91643.54858.68558.45230.82211.735-2.5619.46419.87322.20722.02318.72822.24314.73120.6865.11125.61834.03737.30923.96849.82667.80567.79154.52438.066
us-gaap:OperatingExpenses ▄▅▂▃▄▃▄█▆▅▄▄▅▃▄▃▂▂▁▃▅▂▃▂▁▁▁▃█▅▅▅▅▂▄▁▁24.20526.33217.71319.99323.23419.56823.1936.95231.24626.83723.37122.69527.23219.04522.02620.44516.84215.24913.78118.63626.75414.95119.79415.75213.69614.33214.03118.94537.73327.83127.85228.58326.44918.19624.31614.013.023NA
us-gaap:ResearchAndDevelopmentExpense ▁▁▁▁▂▂▂▅█▅▅▅▂▃0.00.0-0.0790.0530.1580.4030.3991.2692.3371.4361.1511.130.3120.683NANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:GeneralAndAdministrativeExpense ▃▅▅▄▅▆▅▆▅▄▃▅▆▅█▆▆▆▄▅▄▅▄▄▄▄▃▄▄▃▂▂▂▁▂▂▁▂6.9798.9398.9777.9788.9189.9598.69310.3279.7877.7356.5679.52910.3099.20613.31211.15510.35910.2147.7249.4618.2968.727.5547.8848.1597.9416.7847.727.4826.9395.535.6955.5273.7325.5594.553.6844.664
us-gaap:OperatingIncomeLoss ▅▃▅▄▁▃▂▂▄▅▆▆▄▅▆▇▇▅▄▃▃▄▄▅▄▅▄▄▂▄▅▅▄▆▇█9.874-14.967.605-5.113-43.477-16.124-24.455-30.3763.75611.94923.85520.9423.97515.87121.52238.2441.6115.573-2.046-21.197-17.294.9222.4136.2715.0327.9110.71.741-32.622-2.2136.1858.726-2.48131.6343.48953.791NANA
us-gaap:InterestExpense ▆█▇▆▆▆▆▆▆▅▅▅▆▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▂▂▂▂▂▂▁▂▁11.82916.31114.6711.77711.33510.66510.92510.14610.0799.7949.5899.35810.5438.5225.1415.5745.375.7116.0396.6176.5416.1926.4686.5056.9626.847.1837.3486.4540.7040.8640.5910.5050.4910.411-1.4960.505-0.529
 us-gaap:InterestExpenseDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType hl:The2028SeniorNotesAnd2021SeniorNotes,us-gaap:SeniorNotes▁█8.913.7NANA9.09.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InterestPaidNet ▁█1.85313.984NANA19.3030.672NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherNonoperatingIncomeExpense ▃▄▂▁▁▁▃▄▆▆██▇▇-0.649-0.527-1.022-1.096-1.187-1.124-0.613-0.3460.108-0.0560.5070.5410.3190.325NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType us-gaap:PerformanceSharesNA5.1-4.5NANA8.3-4.32.3NANA-4.52.1NANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType us-gaap:RestrictedStockUnitsRSUNA1.2-1.2-1.14.31.6NANA5.6NANANANANANANANA1.2NANANA1.1NANANA4.64.6NANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments ▃▃▃▃▁▂▂▃▄▄▄▄▃▄▅▆▆▄▄▃▃▅▄▄▃▅▃▃▂▅▄▄▄▅█▆▅▅-13.402-18.247-12.068-21.13-57.711-32.749-28.91-25.86312.5019.00810.507-3.989-7.921-2.23725.08735.24235.6121.036-2.46-15.39-26.79913.99112.7273.856-19.42415.424-10.781-11.0-31.65318.5091.6-0.8713.21730.08483.24652.95927.87125.339
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:GuarantorSubsidiaries,srt:ReportableLegalEntities▆▇▅▅▂▆▁▅▇▇▆▆▅█1.35211.682-0.81-5.884-24.0091.898-30.476-6.0497.90811.5875.5976.449-0.45617.079NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:NonGuarantorSubsidiaries,srt:ReportableLegalEntities▅▅▅▅▁▂█▁▅▆▇▄▄▅1.941-0.5711.8771.266-33.103-25.15428.136-31.4251.97812.43718.896-4.196-4.2271.371NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities▄▄▅▄▁▃▃▃▇▆▃▅▃█-13.991-17.185-7.944-19.516-46.53-25.533-24.289-23.18312.0748.24-28.9670.314-26.48326.834NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:ConsolidationItems srt:ConsolidationEliminations▄▄▄▅█▆▄▇▄▃▆▄▆▁-2.704-12.173-5.1913.00445.93116.04-2.28134.794-9.459-23.25614.034-7.38323.245-47.521NANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NonoperatingIncomeExpense ▁▃▂▂▂▂▃▄▅▃▂▁▂▂▄▃▃▂▄▄▃▅▅▃▁▅▂▂▄▆▃▃▄▄█▄▂▄-23.276-3.287-19.673-16.017-14.234-16.625-4.4554.5138.745-2.941-13.348-24.931-11.896-18.1083.565-2.998-5.998-14.537-0.4145.807-9.5099.06910.314-2.415-24.4567.513-11.481-12.7410.96920.722-4.585-9.5975.698-1.54639.757-0.832-13.630.747
us-gaap:IncomeTaxExpenseBenefit ▃▃▃▃▂▃▃▃▃▃▆▃▅▁▄▄▄▃█▃▃▃▃▃▃▄▃▃▃▄▃▃▃▄▅▅▄▄0.626-1.062-4.092-1.614-11.179-7.216-5.217-2.6790.4270.76838.256-5.40116.095-29.0714.8259.45311.4961.65460.503-5.5-0.1321.439-4.1780.18-5.0253.783-7.873-2.542-6.7957.4150.8570.0140.69311.51527.32519.6428.088.255
us-gaap:NetIncomeLoss ▄▄▄▄▂▃▃▃▅▅▃▅▃▆▆▆▆▅▁▄▃▅▆▅▄▅▅▄▃▅▅▅▅▆█▇▆▆-14.028-17.185-7.976-19.516-46.532-25.533-23.693-23.18412.0748.24-27.7491.412-24.01626.83420.26225.78924.116-0.618-62.963-9.89-26.66712.55216.9053.676-14.39911.641-2.908-8.458-24.85811.0940.743-0.8852.52418.56955.92133.31719.79117.084
 us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:GuarantorSubsidiaries,srt:ReportableLegalEntities▇██▇▇█▆▇██▁███-6.30512.7380.267-6.509-26.868-2.018-40.165-24.6014.1936.099-193.9575.1110.6128.11NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:NonGuarantorSubsidiaries,srt:ReportableLegalEntities▅▅▅▅▂▂█▁▅▆▇▃▅▄1.704-1.4080.911-0.252-21.502-20.41524.041-30.0171.55211.66916.091-12.48-0.5-5.409NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities▄▄▅▄▁▃▃▃▇▆▃▅▃█-14.028-17.185-7.976-19.516-46.532-25.533-23.693-23.18412.0748.24-28.9670.314-26.48326.834NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:ConsolidationItems srt:ConsolidationEliminations▂▁▂▂▃▂▂▄▁▁█▂▂▂4.601-11.33-1.1786.76148.3722.43316.12454.618-5.745-17.768177.8667.3692.355-2.701NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▅▅▆▄▁▄▄▄██-14.028-17.185-7.976-19.516-46.532-25.533-23.693-23.18412.0748.24NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTax ▅▃▄▃▂▄▃▄▅▅▃▅▄▇▆▆▆▅▁▄▃▆▅▅▄▆▅▄▃▅▅▅▅▅█▇-3.644-36.52-7.328-22.804-42.992-21.274-37.98-19.4386.9126.136-30.2389.048-21.13830.03816.60225.17425.3550.447-63.953-10.281-27.82214.4889.7355.952-16.58712.991-3.003-5.969-26.8028.263-1.9572.21.93811.71255.12332.235NANA
 us-gaap:ComprehensiveIncomeNetOfTax us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:GuarantorSubsidiaries,srt:ReportableLegalEntities▇██▇▇▇▆▇██▁███-6.30512.7380.267-6.509-26.868-2.018-40.165-24.6014.1936.099-193.6615.1110.6128.11NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ComprehensiveIncomeNetOfTax us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:NonGuarantorSubsidiaries,srt:ReportableLegalEntities▅▅▅▅▂▂█▁▅▆▇▃▅▄1.704-1.4080.911-0.252-21.502-20.41524.038-30.0141.55211.70716.797-11.4580.347-5.498NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ComprehensiveIncomeNetOfTax us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities▅▂▄▃▁▃▁▃▆▆▂▆▃█-3.644-36.52-7.328-22.804-42.992-21.274-37.98-19.4386.9126.136-31.4567.95-23.60530.038NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ComprehensiveIncomeNetOfTax us-gaap:ConsolidationItems srt:ConsolidationEliminations▂▁▂▂▃▂▂▄▁▁█▂▂▂4.601-11.33-1.1786.76148.3722.43316.12754.615-5.745-17.806176.8646.3471.508-2.612NANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▄▄▄▄▂▃▃▃▅▅▃▅▃▆▆▆▆▅▁▄▃▅▆▅▄▅▅▄▃▅▅▅▅▆█▇▆▆-14.166-17.323-8.114-19.654-46.67-25.671-23.831-23.32211.9368.102-27.8871.274-24.15426.69620.12425.65123.978-0.756-63.101-10.028-26.80512.41416.7673.538-14.53711.503-3.046-8.596-24.99610.9560.605-1.0232.38618.43155.78333.17916.38313.675
 us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:GuarantorSubsidiaries,srt:ReportableLegalEntities▇██▇▇█▆▇██▁███-6.30512.7380.267-6.509-26.868-2.018-40.165-24.6014.1936.099-193.9575.1110.6128.11NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:NonGuarantorSubsidiaries,srt:ReportableLegalEntities▅▅▅▅▂▂█▁▅▆▇▃▅▄1.704-1.4080.911-0.252-21.502-20.41524.041-30.0171.55211.66916.091-12.48-0.5-5.409NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities▄▄▅▄▁▃▃▃▇▆▃▅▃█-14.166-17.323-8.114-19.654-46.67-25.671-23.831-23.32211.9368.102-29.1050.176-26.62126.696NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic us-gaap:ConsolidationItems srt:ConsolidationEliminations▂▁▂▂▃▂▂▄▁▁█▂▂▂4.601-11.33-1.1786.76148.3722.43316.12454.618-5.745-17.768177.8667.3692.355-2.701NANANANANANANANANANANANANANANANANANANANANANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302010-09-302010-06-30
 Operating Margin us-gaap:StatementBusinessSegments hl:SanSebastian▁▂▄▃▂▃▂▃▃▃▄▆▄▅▆▆█▅4.9349.92717.18215.43510.99312.69.49714.12913.26413.33418.89225.58919.30521.97228.20326.31835.68323.685NANANANANANANANANANANANANANANANANANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302010-09-302010-06-30
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302010-09-302010-06-30
us-gaap:Assets ▇█▇█████▆▆▆▆▆▆▆▆▆▅▅▆▆▅▅▅▅▅▅▅▆▁▁▁▁▁▂▁2603.4082764.1242637.3082673.1782670.7132694.6052703.9442710.2582392.5942398.0912364.9572396.1832379.1562406.4612371.6772363.6792270.812239.1732221.9252285.2132292.2682259.9512262.0642252.4532255.1272250.2812232.1192269.0122272.4551380.1121378.291403.6031390.4941396.091515.721460.389NANA
us-gaap:Liabilities ▇█▇█▇▇▇▇▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▇▇▁▁▁▁▁▂▂944.7151107.241944.8851056.5341031.4851024.0351012.981988.189891.295903.59881.075883.242876.77892.158891.833901.696891.132891.927882.999883.442880.694840.626865.09866.086913.744906.819905.7941.226937.729236.916240.339256.315245.061255.977416.677417.176NANA
us-gaap:LiabilitiesAndStockholdersEquity ▇█▇█████▆▆▆▆▆▆▆▆▆▅▅▆▆▅▅▅▅▅▅▅▆▁▁▁▁▁▂▁2603.4082764.1242637.3082673.1782670.7132694.6052703.9442710.2582392.5942398.0912364.9572396.1832379.1562406.4612371.6772363.6792270.812239.1732221.9252285.2132292.2682259.9512262.0642252.4532255.1272250.2812232.1192269.0122272.4551380.1121378.291403.6031390.4941396.091515.721460.389NANA
us-gaap:StockholdersEquity ▇▇█▇▇▇██▅▅▅▅▅▆▅▅▄▄▃▄▄▄▄▄▃▃▃▃▃▁▁▁▁▁1658.6931656.8831692.4231616.6441639.2281670.571690.9631722.0691501.2991494.5011483.8821512.9411502.3861514.3031479.8441461.9831379.6781347.2461338.9261401.7711411.5741419.3251396.9741386.3671341.3831343.4621326.4191327.7861334.7261143.1961137.9511147.2881145.4331140.113NANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302010-09-302010-06-30
us-gaap:AssetsCurrent ▂▄▂▂▁▁▁▂▅▅▄▄▄▄▄▄▄▃▃▄▄▄▄▄▅▄▅▅▅▃▃▄▄▅██214.881342.542179.124178.926145.418144.107164.15198.329352.362366.105320.325311.335291.758315.155303.384310.001311.135276.854269.533291.163299.084308.325316.359318.439346.88332.271343.635389.886399.117258.231282.898330.949339.496362.744542.812522.315NANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▂▅▂▁▁▁▁▂▅▅▄▄▄▄▄▄▃▃▄▄▄▄▄▅▅▄▅▅▆▄▄▅▅▅█▇▅▄75.923215.71562.45232.9959.43411.79727.38960.856239.722212.569186.107172.923164.113176.786169.777167.844143.613134.018155.209174.454191.574196.231209.665222.36222.083207.642212.175237.836296.375168.614190.984232.194233.327266.463413.743377.436216.577197.378
us-gaap:AccountsReceivableNetCurrent ▅▁▂▁▁▂▁▂▂▄▃▁▂▃▄▅▅▅▃▂▂▅▃▃▄▅▃▆▂▂▃▄▅▂▅█26.0036.06211.9526.2226.8779.5864.18412.9479.71719.71314.8056.9829.18317.2120.08226.62225.66730.12713.4910.3847.78127.2817.69617.43321.03326.15917.67234.4818.30611.92717.55521.99130.48410.99629.09545.121NANA
us-gaap:InventoryFinishedGoods ▆▅▄█▆▆▇▅▄▅▃▅▃▄▃▃▃▄▃▂▄▃▃▂▄▃▃▃▂▂▂▁▁▂▂▁46.67639.4530.36463.16445.28544.6153.17242.46435.16937.02428.45538.06425.12530.81625.94423.00528.33629.19922.44120.28129.35322.92125.99920.33529.56922.74627.7423.42518.77119.67715.07311.739.78613.69214.52711.517NANA
us-gaap:OtherAssetsCurrent ▄▇▄▄▆▃▄█▆▆▅▆▃▃▄▄▃▃▄▆▅▆▅▃▂▅▃▇▇▅▃▅▇█▇▁9.56718.79411.93110.415.5248.23911.17921.5117.00617.36913.71516.3178.9558.25612.12510.4517.9999.2899.45315.95714.0415.33712.3127.5165.93413.0168.32420.52618.89312.5198.85812.2320.06221.96719.4612.336NANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302010-09-302010-06-30
us-gaap:PropertyPlantAndEquipmentNet ▇▇██████▆▆▆▆▆▆▆▆▆▅▅▅▅▅▅▅▅▅▅▅▅▂▂▁▁▁▁▁2354.8832393.1872423.6982455.5112485.8692508.9812520.0042487.4292006.5922008.7042020.0212025.6072033.5062032.9832032.6852023.1091926.1581907.7751896.8111878.1771863.441837.1731831.5641829.51818.6321805.6321791.6011776.5541742.6961007.896996.659973.586953.365923.212872.86855.482NANA
us-gaap:LongTermInvestments █▃▄▅▄▄▄▅▅▅▅▅▃▃▃▄▃▁▁▁▂▃▃▅▅▆▅▆▆▆▆▆▂▃▂▃12.1624.9196.2077.3495.8156.7686.5837.197.4497.6527.5617.0984.7295.1045.0026.3564.4532.0861.5152.0032.6724.3344.927.0227.4668.737.0198.3648.7669.4299.6149.0232.6713.9233.34.2NANA
 us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities▆▆▆▃▄▄▅█▁▁▁1643.531648.1331636.8021499.3181506.0791554.4481577.5641767.2341379.3841373.6041358.025NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset ▅▆▇▇▇█▁13.2214.90916.38117.31319.01920.6470.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▂▂▃▃▄▄▄▅█▅▅▂▁▁▂▁▂▁▁▁▂▄▃▁▂▃▂▄▆▅▁▁▃▆█▂4.0284.5077.3369.35310.17210.01910.19514.69924.00713.95414.5096.3843.4372.6094.8842.5733.6382.7832.7833.0343.57610.6929.4153.443.5779.2695.86712.8817.44514.9441.8832.8557.73417.31724.0223.654NANA
us-gaap:EquitySecuritiesFvNi █▁▂▃▂▃▃▃▃▄▄12.24.96.27.35.86.86.67.27.47.77.6NANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302010-09-302010-06-30
us-gaap:LiabilitiesCurrent ▂▂▂▃▂▃▃▃▂▂▂▂▂▃▃▃▃▃▃▃▂▁▁▂▃▄▄▅▂▁▁▁▁▂██115.636117.183116.974145.843117.853146.821136.194132.456105.333115.934112.13115.797113.788132.655127.48135.147129.788132.818127.084125.616109.19388.53890.985101.042147.046151.56151.479177.904118.05590.02594.98798.31991.751107.316254.694253.528NANA
us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent ▂▃▅▅▇▅█▆▄▄▃▃▃▄▅▅▅▅▄▃▃▂▂▃▂▂▄▅▅▁▂▂▁▂▄▃40.78949.43757.71657.8669.33661.6877.86165.75553.83551.63646.54946.84747.97951.73960.06457.00357.70256.65751.27747.72444.539.71241.86945.78839.41439.23251.15256.59260.86437.25643.16239.65234.58737.83151.6344.355NANA
us-gaap:TaxesPayableCurrent ▅▃▃▁▁▅▄▅▄▄▃▃█▆▅▃▃▅▅▄▂▂▃▄▆▇▅▂▃▆▇▆▂▆▆▆8.4515.8424.7762.161.4349.1097.7278.2746.1437.2735.9195.08114.20511.0899.0615.994.3448.9588.9157.0782.423.8914.2416.31910.44212.6197.8813.7295.3129.82412.3219.7433.73610.3549.7669.678NANA
us-gaap:OperatingLeaseLiabilityCurrent ▅▆▇▇██▁4.1624.7925.585.8646.6286.7010.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesCurrent ▁▄▃▄▁▄▃▁▁▄▅▄▅█▅█▅▇▄▇▃▇▃▇▄▇▄█▄0.1267.6616.1728.5280.8986.6965.9371.2051.3887.06610.3717.96811.26818.17310.06417.03310.2916.0686.88415.0566.23614.6955.79715.6438.05715.2286.78117.5768.11NA3.335NANANANANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302010-09-302010-06-30
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType hl:The2028SeniorNotes,us-gaap:SeniorNotes▁█468.3469.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType,us-gaap:SubsequentEventType hl:IQNotes,us-gaap:SeniorNotes,us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LongTermDebtAndCapitalLeaseObligations ▂█▂▅▅▃▂▂▂▂▁▁534.388694.97522.761604.653607.09556.989540.67542.705541.987540.66508.422509.353NANA506.817NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet ▂▁█128.677126.237138.282NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent █▇▇▄▃▄▃▁▄▃▂▁▃▂▁▁▃▂▂58.84857.30956.21950.66248.44849.82147.71144.09748.97348.45946.62843.45147.21146.44344.49143.74247.8845.87446.513NANANA43.348NANANA31.763NANANA30.53NANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent ▁▃▂▂▁▂▂▁▁▁▂▂▂▁▂▂▁▁▂██▇█▇▆▅▆▆▆▆▆▅▅▅▃▃2.43514.0336.8568.1135.9746.7939.894.6894.4382.78412.98311.166.4145.32111.5187.6265.3623.5396.1950.48551.50447.50453.05742.46635.87334.86237.53639.1841.40737.44640.04733.90532.4530.83315.9916.149NANA
us-gaap:OperatingLeaseLiabilityNoncurrent ▆▆▆▇▇█▁9.07910.13910.81811.46612.4113.9640.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302010-09-302010-06-30
us-gaap:StockholdersEquity ▇▇█▇▇▇██▅▅▅▅▅▆▅▅▄▄▃▄▄▄▄▄▃▃▃▃▃▁▁▁▁▁1658.6931656.8831692.4231616.6441639.2281670.571690.9631722.0691501.2991494.5011483.8821512.9411502.3861514.3031479.8441461.9831379.6781347.2461338.9261401.7711411.5741419.3251396.9741386.3671341.3831343.4621326.4191327.7861334.7261143.1961137.9511147.2881145.4331140.113NANANANA
us-gaap:CommonStockValue ███▇▇▇▇▇▄▄▄▄▄▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▁▁▁▁▁▁133.699132.381132.292124.133123.701122.052121.956121.283101.643101.29100.926100.886100.73999.97399.80699.75997.20796.21595.21995.11494.77193.10692.38292.26187.51685.94385.89685.8985.8971.571.49971.49671.49671.4270.003NANANA
us-gaap:AdditionalPaidInCapital ███▇▇▇▇▇▅▅▅▅▅▅▅▅▄▄▄▄▄▄▄▄▃▃▃▃▃▁▁▁▁▁▁▁1982.41976.0331973.71897.3631895.6171882.6131880.4811872.9461628.441626.2981619.8161617.6691614.6511603.3241597.2121594.8161538.1481528.821519.5981517.5141515.3621495.8931486.751484.9691447.3331431.9031426.8451425.5811424.1981219.081218.2831217.4611216.6591215.2291181.5591180.74NANA
us-gaap:RetainedEarningsAccumulatedDeficit ▁▁▂▂▃▄▅▅▆▆▆▇▇▇▇▆▆▅▅▇▇█▇▇▇▇▇▇▇██████▆-387.688-371.958-353.331-343.958-323.079-275.188-248.308-223.28-176.158-187.092-195.484-166.602-166.875-141.73-167.437-186.579-211.258-234.272-232.565-168.522-157.547-129.817-141.306-157.148-159.748-144.355-154.982-151.079-141.627-115.896-123.288-117.471-115.734-120.557-133.398-189.179NANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▃▁▄▄▅▄▃▆▅▆▇▇▆▅▅▅▆▅▅▅▅▆▅▆▆▆▆▆▆▆▇▇▇▇██-46.261-56.645-37.31-37.958-34.67-38.21-42.469-28.183-31.929-26.767-23.373-20.884-28.52-31.398-34.602-30.942-30.327-31.566-32.631-31.64-31.25-30.095-32.031-24.894-27.137-24.949-26.299-27.565-28.694-26.577-23.918-21.219-24.304-23.498-16.64-15.843NANA
us-gaap:TreasuryStockValue █████▇▇▇▇▇▆▆▆▅▅▅▅▄▄▄▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁▁23.49622.96722.96722.97522.3820.73620.73620.73620.73619.26718.04218.16717.64815.90515.17415.1114.13111.9910.73410.7349.8019.8018.868.866.625.1195.085.085.084.954.6643.0182.7232.522.522.52NANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▆▅▇▇▅▆▆▆▆▆▆▆▅▆▇█▇▆▆▆▆▆▆▅▆▆▆▅▅▅▅▆▅▁▇▇▆▇37.5264.92757.25754.896-11.31720.0319.01128.19230.63516.38341.76328.2947.53638.28552.21486.97667.3918.74827.47726.79530.75421.41924.3561.73926.64630.38321.564-5.195-1.08511.362.52835.248-10.186-118.04760.72166.30740.68256.996
us-gaap:NetCashProvidedByUsedInInvestingActivities ██▇▇▇▇▇▅██▇█▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▁▇▇▇▇▇▇███-11.41-19.716-23.986-24.554-38.257-33.07-51.959-169.4012.978-18.165-26.161-15.59-24.568-29.076-45.339-57.535-57.452-38.339-41.728-37.003-31.995-27.88-31.859-33.607-23.537-29.352-37.698-52.605-356.993-28.201-34.203-32.416-26.802-23.105-23.801-9.365-20.861-19.656
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▅▃▃▃▃▃▂▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃█▃▃▃▃▃▃▃▃▃-165.85169.816-4.432-6.60646.874-2.6470.796-37.969-5.05227.341-2.462-3.8595.087-4.014-4.241-4.549-0.096-3.135-3.886-5.127-3.717-4.413-3.53334.5199.384-3.866-2.802-2.559485.839-5.529-9.535-3.965-8.189-6.128-0.613-1.168-0.62243.696
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▂█▅▅▅▄▄▁▅▅▅▅▄▅-139.792153.29129.45723.561-2.363-15.592-33.452-178.86127.15326.43513.148.788-13.7757.009NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:GuarantorSubsidiaries,srt:ReportableLegalEntities█▆▇▅▅▄▆▁▇▃7.5391.6555.749-1.071-1.162-5.3920.813-16.5213.29-9.946NANANA5.396NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:NonGuarantorSubsidiaries,srt:ReportableLegalEntities▆▅█▇▇▅▄▁▆▇0.872-4.8888.9415.6642.186-7.336-12.449-27.065-1.9912.756NANANA10.362NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities▁█▅▅▄▄▄▁▅▅-148.203156.52414.76718.968-3.387-2.864-21.816-135.27525.85433.625NANANA-8.749NANANANANANANANANANANANANANANANANANANANANANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▆▅▇▇▅▆▆▆▆▆▆▆▅▆▇█▇▆▆▆▆▆▆▅▆▆▆▅▅▅▅▆▅▁▇▇▆▇37.5264.92757.25754.896-11.31720.0319.01128.19230.63516.38341.76328.2947.53638.28552.21486.97667.3918.74827.47726.79530.75421.41924.3561.73926.64630.38321.564-5.195-1.08511.362.52835.248-10.186-118.04760.72166.30740.68256.996
us-gaap:NetIncomeLoss ▄▄▄▄▂▃▃▃▅▅▃▅▃▆▆▆▆▅▁▄▃▅▆▅▄▅▅▄▃▅▅▅▅▆█▇▆▆-14.028-17.185-7.976-19.516-46.532-25.533-23.693-23.18412.0748.24-27.7491.412-24.01626.83420.26225.78924.116-0.618-62.963-9.89-26.66712.55216.9053.676-14.39911.641-2.908-8.458-24.85811.0940.743-0.8852.52418.56955.92133.31719.79117.084
 us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:GuarantorSubsidiaries,srt:ReportableLegalEntities▇██▇▇█▆▇██▁███-6.30512.7380.267-6.509-26.868-2.018-40.165-24.6014.1936.099-193.9575.1110.6128.11NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:NonGuarantorSubsidiaries,srt:ReportableLegalEntities▅▅▅▅▂▂█▁▅▆▇▃▅▄1.704-1.4080.911-0.252-21.502-20.41524.041-30.0171.55211.66916.091-12.48-0.5-5.409NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities▄▄▅▄▁▃▃▃▇▆▃▅▃█-14.028-17.185-7.976-19.516-46.532-25.533-23.693-23.18412.0748.24-28.9670.314-26.48326.834NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:ConsolidationItems srt:ConsolidationEliminations▂▁▂▂▃▂▂▄▁▁█▂▂▂4.601-11.33-1.1786.76148.3722.43316.12454.618-5.745-17.768177.8667.3692.355-2.701NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▅▅▆▄▁▄▄▄██-14.028-17.185-7.976-19.516-46.532-25.533-23.693-23.18412.0748.24NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DepreciationDepletionAndAmortization ▅▅█▇▆▅▄▆▄▄▄▄▃▄▄▃▄▃▄▃▃▃▄▃▃▃▃▂▂▁▁▁▁▁▁▁▂▂42.55541.6361.43552.21950.55440.26732.09145.96233.36229.4934.29630.72627.31829.5933.51326.93230.81526.15331.1128.50927.44325.52331.05727.07127.99126.05427.08720.44520.12314.71114.07113.24311.5312.57911.17211.2715.01315.07
us-gaap:IncreaseDecreaseInAccountsReceivable ▇▃▅▄▆▅▃▆▃▆▆▄▄▆▅▂▄▇▅▅▃▆▆▄▄▄▃█▄▄▄▄█▁▇▅▁▇16.005-9.9550.724-2.5577.7095.063-14.2676.895-9.7377.2667.317-6.053-7.5888.7381.543-21.686-4.12620.0363.8835.42-10.6798.217.861-2.554-7.011-1.387-13.39823.828-4.409-4.708-4.795-7.3324.852-24.27616.0275.113-26.40816.264
us-gaap:IncreaseDecreaseInInventories ▅▇▁▇▆▅▇█▆▇▄█▅▆▇▄▆▇▇▄▇▅▇▄▇▅▆▇▄▇▆▆▅▆▆▆▅▆-2.0226.602-22.6476.3543.318-3.1718.55812.0890.1036.762-5.86711.205-4.9523.3585.653-5.758-0.125.9225.236-7.7997.366-3.9496.006-9.5437.087-4.6694.5845.524-8.7095.1083.4671.988-1.0650.4563.7524.166-3.7192.344
us-gaap:DeferredIncomeTaxExpenseBenefit ▃▃▂▃▂▂▂▃▃▃▇▃▃▁▂▃▄▃█▃▃▃▄▃▃▃▂▃▂▃▃▂▃▄▅▄▃▄-1.277-3.863-6.505-4.396-12.897-8.293-5.802-2.759-2.539-0.43842.595-1.4420.16-21.789-7.052-0.4437.3633.14556.714-1.175-1.3470.6347.8790.955-4.06-2.872-6.2172.985-7.9383.992.569-5.6270.7216.15422.4714.9381.8016.38
us-gaap:ShareBasedCompensation ▄▄▃▄▇▅▅█▄▃▄▇▅▄▄▄█▄▄▆▄▃▃▄▅▃▄▄▃▂▂▂▃▁▁▁▂█1.2091.2190.911.2061.9721.581.6062.2311.3141.1271.382.1121.4821.3491.371.3472.2361.2311.3891.7751.2011.061.1391.2651.4961.0651.2081.3831.0720.7980.8050.8010.9370.5760.5770.5430.8632.14
us-gaap:AmortizationOfFinancingCosts ▂█▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▃▃▂▂▂▂▁▁▁▁▁▁▁0.4842.140.7180.6670.6270.6250.6060.5730.4490.4490.4490.4480.4870.480.4740.4710.4670.4590.4560.4550.4560.4540.480.5680.6160.5190.530.5080.2620.1350.1360.1230.1010.10.1660.166NANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInInvestingActivities ██▇▇▇▇▇▅██▇█▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▁▇▇▇▇▇▇███-11.41-19.716-23.986-24.554-38.257-33.07-51.959-169.4012.978-18.165-26.161-15.59-24.568-29.076-45.339-57.535-57.452-38.339-41.728-37.003-31.995-27.88-31.859-33.607-23.537-29.352-37.698-52.605-356.993-28.201-34.203-32.416-26.802-23.105-23.801-9.365-20.861-19.656
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▁▂▃▃▅▅█▆▃▂▄▃▃▃▇▆▆▅▆▅▄▄▄▅▄▄▅█▅▃▄▄▄▃▃▂▃▃10.81919.8724.08326.09338.17433.07153.64839.98125.66917.63527.64824.42624.30621.65844.55243.27642.30634.65442.04437.12731.31426.95831.8433.23630.59426.86737.9352.51534.53825.75331.77829.78326.88323.16523.80118.74920.86121.132
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▅▃▃▃▃▃▂▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃█▃▃▃▃▃▃▃▃▃-165.85169.816-4.432-6.60646.874-2.6470.796-37.969-5.05227.341-2.462-3.8595.087-4.014-4.241-4.549-0.096-3.135-3.886-5.127-3.717-4.413-3.53334.5199.384-3.866-2.802-2.559485.839-5.529-9.535-3.965-8.189-6.128-0.613-1.168-0.62243.696
us-gaap:ProceedsFromIssuanceOfLongTermDebt ▁█▁▂▂▂▁▁▁▁0.0679.534.575.0112.058.024.047.00.031.024NANANANANANANANANANANANANANANANA0.00.0NANANANANANANANANANA
 us-gaap:ProceedsFromIssuanceOfLongTermDebt us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities▁█▁▂▂▂▁▁▁▁0.0679.534.575.0112.058.024.047.00.031.024NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ProceedsFromIssuanceOfLongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType hl:The2028SeniorNotes,us-gaap:SeniorNotesNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsOfDividends ██▇▆▆▆▆▆▂▂▂▂▂▂▂▁▁▁1.4561.4421.3961.3641.3581.3481.3381.3311.141.1361.1361.1351.131.1271.1231.1061.11.09NANANANA1.0561.0520.9960.995NA0.9954.4150.138NANANANANANANANA
us-gaap:PaymentsOfDividendsCommonStock ██▇▇▇▆▆▆▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▁▁1.3181.3041.2591.2251.2211.2091.21.1931.0020.9980.9980.9970.9920.9890.9850.9680.9620.9520.9430.9460.9260.9240.9180.9140.8580.857NANANANANANANANANANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302010-09-302010-06-30
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:LongtermDebtType hl:The2028SeniorNotes,us-gaap:SeniorNotesNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:LongtermDebtType,us-gaap:SubsequentEventType hl:IQNotes,us-gaap:SeniorNotes,us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:SubsequentEventType hl:TheIQNotes,us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

None

us-gaap:CommonStockValue

us-gaap:CommonStockValue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value1331321321241231221211211011011001001009999999796959594939292878585858571717171717170696459
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.14.85.04.64.64.54.54.54.24.24.34.24.24.24.24.24.34.34.34.24.14.14.14.13.93.83.83.83.85.25.25.15.15.15.14.64.94.75.7

None

us-gaap:CommonStockSharesAuthorized

us-gaap:CommonStockSharesAuthorized


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-05-312009-12-31
Value750750750750750750750750750750750750750500500500500500500500500500500500500500500500500500500500500500500500500500500400400
Percentage of CommonStockSharesAuthorized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value5255234894864824524034014013960.398149389387379377371369362344350342303297285295296295295296270266261
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value5255234894864824524003993983960.39537387383379377371368359344342342303285285285285279279278256248242
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-0.03-0.03-0.01-0.04-0.1-0.05-0.05-0.050.030.02-0.070-0.0670.00.050.070.06-0.16-0.03-0.070.030.050.01-0.040.03-0.01-0.03-0.080.04000.010.040.070.20.120.16-0.050.060.060.08
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-0.03-0.03-0.01-0.04-0.1-0.05-0.05-0.050.030.02-0.070-0.0670.00.050.070.06-0.16-0.03-0.070.030.050.01-0.040.03-0.01-0.03-0.080.04000.010.040.060.190.110.15-0.050.060.050.07
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302010-09-302010-06-30
Value16613622416113415213614314713916014013414216417917113111510410411912113511712511410685768181671021200.0491156.351
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService

hl:Lead


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value126.42127.1146.679.0256.367.552109.2279.9026.3738.10113
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax7.54.75.84.45.05.94.75.37.36.66.24.56.09.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax7.54.75.84.45.05.94.75.37.36.66.24.56.09.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax hl:Lead100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

hl:SilverContracts


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value613769403645323838
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax37.127.431.025.127.129.824.126.526.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax37.127.431.025.127.129.824.126.526.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax hl:SilverContracts100.0100.0100.0100.0100.0100.0100.0100.0100.0

hl:Zinc


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2117261522242120273029242029
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax12.912.611.99.517.116.215.414.618.821.618.317.315.321.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax12.912.611.99.517.116.215.414.618.821.618.317.315.321.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax hl:Zinc100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Gold


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value899012610378797982777374736662
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax53.666.256.464.358.352.258.457.552.752.346.352.349.944.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax53.666.256.464.358.352.258.457.552.752.346.352.349.944.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:Gold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementBusinessSegments

hl:CasaBerardi


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value5046535345404552565552534341504153324536353145393842372710
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax30.133.724.033.133.926.333.636.838.139.832.938.332.629.330.822.931.124.639.334.934.226.737.429.432.633.532.925.711.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax30.133.724.033.133.926.333.636.838.139.832.938.332.629.330.822.931.124.639.334.934.226.737.429.432.633.532.925.711.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax hl:CasaBerardi100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

hl:GreensCreek


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value8453105595580606574658761715861855953525454675867556355647072818167
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax51.039.346.836.541.352.544.045.450.747.154.443.453.141.337.347.834.841.145.251.851.956.647.850.047.250.648.860.882.195.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax51.039.346.836.541.352.544.045.450.747.154.443.453.141.337.347.834.841.145.251.851.956.647.850.047.250.648.860.882.195.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax hl:GreensCreek100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

hl:LuckyFriday


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302010-09-302010-06-30
Value112.835.4714.0174.9512.1821.497-0.0113.2874.9771.5330.199-0.1872024262221171314191827232020145.1283.801-0.0010.0-0.0042043362721
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax6.92.12.42.53.71.41.1-0.02.23.61.00.1-0.114.014.814.613.316.215.513.314.016.714.820.620.216.018.313.56.05.0-0.00.0-0.020.036.173559.223.3341.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax6.92.12.42.53.71.41.1-0.02.23.61.00.1-0.114.014.814.613.316.215.513.314.016.714.820.620.216.018.313.56.05.0-0.00.0-0.020.036.173559.223.3341.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax hl:LuckyFriday100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

hl:NevadaOperations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value15244329171719110.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax9.117.619.218.312.911.614.48.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax9.117.619.218.312.911.614.48.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax hl:NevadaOperations100.0100.0100.0100.0100.0100.0100.0100.00.0

hl:SanSebastian


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value4.9349.927171510129.4971413131825192128263523
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax3.07.27.69.68.28.37.09.89.09.511.818.214.415.417.214.720.818.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax3.07.27.69.68.28.37.09.89.09.511.818.214.415.417.214.720.818.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax hl:SanSebastian100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:CostOfRevenue

us-gaap:CostOfRevenue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value132125199146154149137137112100113971031071121001031079499991139810399858050474443425352505659615052
Percentage of CostOfRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax79.591.788.790.8115.197.7100.995.476.272.271.169.576.875.565.976.589.8102.490.983.381.883.784.182.387.180.694.066.558.054.464.20.051.643.8102181.60.00.052.9796.20.0

None

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value132125199146154149137137112100113971031071121001031079499991139810399858050474443425352505659615052
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax79.591.788.790.8115.197.7100.995.476.272.271.169.576.875.565.976.589.8102.490.983.381.883.784.182.387.180.694.066.558.054.464.20.051.643.8102181.60.00.052.9796.20.0

None

us-gaap:CostDepreciationAmortizationAndDepletion

us-gaap:CostDepreciationAmortizationAndDepletion


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3939605049383043312833292528
Percentage of CostDepreciationAmortizationAndDepletion100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax23.729.026.931.436.925.422.530.321.620.121.021.019.020.3

us-gaap:CostDepreciationAmortizationAndDepletion us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3838574729202212111116121315
Percentage of CostDepreciationAmortizationAndDepletion97.796.395.393.458.853.873.128.637.740.150.342.752.854.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax23.227.925.629.421.713.716.48.78.18.110.69.010.111.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.8951.4732.8383.32620178.25231191616161213
Percentage of CostDepreciationAmortizationAndDepletion2.33.74.76.641.246.226.971.462.359.949.757.347.245.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.51.11.32.115.211.76.021.613.512.010.412.09.09.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:GrossProfit

us-gaap:GrossProfit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value34112514-20.2433.444-1.2656.5763538474331344358583011-2.5619.464192222182214205.11125343723484967677974543827
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax20.58.311.39.2-15.12.3-0.94.623.827.829.531.023.224.526.532.734.123.510.2-2.49.116.718.216.315.917.712.919.46.033.542.045.635.80.048.456.2138349.00.00.047.1599.40.0

None

us-gaap:OperatingExpenses

us-gaap:OperatingExpenses


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value242617192319233631262322271922201615131826141915131414183727272826221824141020713
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax14.619.27.912.417.312.817.025.721.219.214.616.120.313.413.411.49.811.611.917.825.712.616.211.611.711.412.317.844.236.434.334.939.50.017.720.228571.40.00.011.2

None

us-gaap:ResearchAndDevelopmentExpense

us-gaap:ResearchAndDevelopmentExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value00-79000.053000.0158000.0403000.0399000.01269000.02337000.01436000.01151000.01130000.0312000.0683000.0
Percentage of ResearchAndDevelopmentExpense0.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.0-0.00.00.10.30.30.91.61.00.70.80.20.5

None

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value6.9798.9398.9777.9788.9189.9598.693109.7877.7356.5679.529109.206131110107.7249.4618.2968.727.5547.8848.1597.9416.7847.727.4826.9395.535.6955.5274.5013.7325.5594.554.6995.7583.6844.6644.113
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax4.26.54.04.96.66.56.47.26.65.54.16.87.76.58.16.26.07.86.79.08.07.36.25.86.96.35.97.28.89.16.87.08.20.03.64.69285.70.00.03.273.40.0

us-gaap:GeneralAndAdministrativeExpense us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4.7895.3393.7794.7223.7385.1112.8454.8664.6023.4484.8134.4644.0942.319
Percentage of GeneralAndAdministrativeExpense68.659.742.159.241.951.332.747.147.044.673.346.839.725.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax2.93.91.72.92.83.32.13.43.12.53.03.23.01.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.5490.4370.4780.3050.4140.4550.3380.6590.570.4540.4680.8480.4940.418
Percentage of GeneralAndAdministrativeExpense7.94.95.33.84.64.63.96.45.85.97.18.94.84.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.30.30.20.20.30.30.20.50.40.30.30.60.40.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.6413.1634.722.9514.7664.3935.514.8024.6153.8331.2864.2175.7216.469
Percentage of GeneralAndAdministrativeExpense23.535.452.637.053.444.163.446.547.249.619.644.355.570.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.02.32.11.83.62.94.03.33.12.70.83.04.34.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value9.874-14.967.605-5.113-43.477-16.124-24.455-30.3763.7561123203.9751521384115-2.046-21.197-17.294.9222.4136.2715.0327.9110.71.741-32.622-2.2136.1858.726-2.4812531435368
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax5.9-10.93.4-3.2-32.4-10.6-17.9-21.12.68.614.914.93.011.113.121.324.311.9-1.8-20.2-16.64.12.04.64.36.30.61.6-38.2-2.97.610.7-3.70.030.736.1109777.60.0

us-gaap:OperatingIncomeLoss us-gaap:StatementBusinessSegments

hl:CasaBerardi


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value3.204-3.88-7.237-0.38-15.363-10.519-2.237-1.1461.0143.255.0742.882-1.708-2.2450.093.691101.9345.01-2.603-3.2
Percentage of OperatingIncomeLoss32.425.9-95.27.435.365.29.13.827.027.221.313.8-43.0-14.10.49.725.512.4-244.912.318.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.9-2.8-3.2-0.2-11.5-6.9-1.6-0.80.72.33.22.0-1.3-1.60.12.16.21.54.3-2.5-3.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax hl:CasaBerardi6.4-8.4-13.4-0.7-33.8-26.3-4.9-2.21.85.99.65.3-3.9-5.40.29.019.96.011.1-7.1-9.0

hl:GreensCreek


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value264.11732179.1412510102523241615141526148.0781.8720.0219.95
Percentage of OperatingIncomeLoss270.9-27.5430.5-343.4-21.0-157.7-44.7-35.2679.3193.8100.779.1387.988.973.069.335.651.9-91.5-0.1-57.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax16.13.014.610.96.816.78.07.517.316.615.011.811.59.99.614.88.76.21.60.09.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax hl:GreensCreek31.57.631.129.716.531.718.216.434.235.227.627.121.624.025.730.924.915.03.60.018.4

hl:LuckyFriday


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value-5.218-8.12-3.741-3.727-2.271-2.781-5.388-5.404-5.261-4.146-7.063-4.642-8.2123.884.7336.6524.0472.7431.801-3.894-0.585
Percentage of OperatingIncomeLoss-52.854.3-49.272.95.217.222.017.8-140.1-34.7-29.6-22.2-206.624.422.017.49.717.6-88.018.43.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-3.1-5.9-1.7-2.3-1.7-1.8-3.9-3.8-3.6-3.0-4.4-3.3-6.12.72.93.72.42.11.6-3.7-0.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax hl:LuckyFriday-45.6-286.9-68.4-92.8-45.9-127.5-359.949127.3-160.1-83.3-460.7-2332.74391.419.419.525.417.812.910.0-28.0-4.0

hl:NevadaOperations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-2.2662.889-5.412-8.346-21.475-13.991-12.974-13.7410.0
Percentage of OperatingIncomeLoss-22.9-19.3-71.2163.249.486.853.145.20.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-1.42.1-2.4-5.2-16.0-9.2-9.5-9.60.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax hl:NevadaOperations-15.012.0-12.5-28.2-123.9-79.3-65.9-119.50.0

hl:SanSebastian


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-0.8590.6792.9271.077-1.923-1.512-2.289-2.381-0.3615.0171117111318182514-2.0-2.42
Percentage of OperatingIncomeLoss-8.7-4.538.5-21.14.49.49.47.8-9.642.047.181.3299.284.885.148.261.595.897.811.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-0.50.51.30.7-1.4-1.0-1.7-1.7-0.23.67.012.18.99.411.110.314.911.4-1.7-2.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax hl:SanSebastian-17.46.817.07.0-17.5-12.0-24.1-16.9-2.737.659.466.561.661.264.970.071.763.00.00.0

us-gaap:AllOtherSegments


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value-11.738-10.645-11.67-11.293-11.586-12.754-12.487-18.409-17.152-15.324-9.409-10.89-13.415-13.332-17.329-17.016-13.473-12.094-8.729-12.301-23.455
Percentage of OperatingIncomeLoss-118.971.2-153.5220.926.679.151.160.6-456.7-128.2-39.4-52.0-337.5-84.0-80.5-44.5-32.4-77.7426.658.0135.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-7.1-7.8-5.2-7.0-8.6-8.4-9.1-12.8-11.6-11.0-5.9-7.7-10.0-9.4-10.6-9.5-7.9-9.2-7.6-11.7-22.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:AllOtherSegments0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:InterestExpense

us-gaap:InterestExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1116141111101010109.7949.5899.358108.5225.1415.5745.375.7116.0396.6176.5416.1926.4686.5056.9626.847.1837.3486.4540.7040.8640.5910.5050.4670.4910.411-1.496-0.4770.4990.505-0.529-0.678
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax7.111.96.57.38.47.08.07.16.87.06.06.67.96.03.13.13.14.45.26.36.35.25.34.85.95.46.36.97.60.91.10.70.80.00.50.3-3053.10.00.00.4-8.30.0

None

us-gaap:InterestExpenseDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:InterestExpenseDebt

hl:The2028SeniorNotesAnd2021SeniorNotes, us-gaap:SeniorNotes


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value8.9139.09.1
Percentage of InterestExpenseDebt100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax5.410.06.76.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax hl:The2028SeniorNotesAnd2021SeniorNotes us-gaap:SeniorNotes0.00.00.00.0

None

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value1.85313190.672
Percentage of InterestPaidNet100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.110.214.40.4

None

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-649000.0-527000.0-1022000.0-1096000.0-1187000.0-1124000.0-613000.0-346000.0108000.0-56000.0507000.0541000.0319000.0325000.0
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-0.4-0.4-0.5-0.7-0.9-0.7-0.4-0.20.1-0.00.30.40.20.2

None

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:PerformanceShares


None
Period End2020-03-312019-12-312019-03-312018-12-312018-09-302017-12-312017-09-30
Value5100000.0-4500000.08300000.0-4300000.02300000.0-4500000.02100000.0
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax3.7-2.05.4-3.11.6-2.81.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:PerformanceShares0.00.00.00.00.00.00.0

us-gaap:RestrictedStockUnitsRSU


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-08-312018-06-302016-03-312015-03-312014-03-312013-12-31
Value1200000.0-1200000.0-1100000.04300000.01600000.07000000.05600000.01200000.01100000.04600000.04600000.0
Percentage of AllocatedShareBasedCompensationExpense23.526.70.00.019.30.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.9-0.5-0.73.21.00.00.00.90.93.70.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:RestrictedStockUnitsRSU0.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-13.402-18.247-12.068-21.13-57.711-32.749-28.91-25.863129.00810-3.989-7.921-2.2372535351.036-2.46-15.39-26.79913123.856-19.42415-10.781-11.0-31.653181.6-0.8713.2171930835266-143.374272515
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-8.1-13.3-5.4-13.1-43.0-21.5-21.2-18.08.56.46.6-2.8-5.9-1.615.319.620.80.8-2.1-14.7-25.711.710.42.8-16.512.3-9.4-10.3-37.124.22.0-1.14.80.029.269.1108079.60.00.024.1399.00.0

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.35211-0.81-5.884-24.0091.898-30.476-6.0497.908115.5976.449-0.45617
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments-10.1-64.06.727.841.6-5.8105.423.463.3128.653.3-161.75.8-763.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.88.5-0.4-3.6-17.91.2-22.3-4.25.48.33.54.6-0.312.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.941-0.5711.8771.266-33.103-25.15428-31.4251.9781218-4.196-4.2271.371
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments-14.53.1-15.6-6.057.476.8-97.3121.515.8138.1179.8105.253.4-61.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.2-0.40.80.8-24.7-16.520.6-21.91.38.911.8-3.0-3.11.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-13.991-17.185-7.944-19.516-46.53-25.533-24.289-23.183128.24-28.9670.314-26.48326
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments104.494.265.892.480.678.084.089.696.691.5-275.7-7.9334.3-1199.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-8.4-12.6-3.5-12.1-34.7-16.7-17.8-16.18.25.9-18.10.2-19.718.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-2.704-12.173-5.1913.0044516-2.28134-9.459-23.25614-7.38323-47.521
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments20.266.743.0-14.2-79.6-49.07.9-134.5-75.7-258.2133.6185.1-293.52124.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-1.6-8.9-2.31.934.210.5-1.724.2-6.4-16.68.8-5.217.3-33.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:NonoperatingIncomeExpense

us-gaap:NonoperatingIncomeExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-23.276-3.287-19.673-16.017-14.234-16.625-4.4554.5138.745-2.941-13.348-24.931-11.896-18.1083.565-2.998-5.998-14.537-0.4145.807-9.5099.06910-2.415-24.4567.513-11.481-12.7410.96920-4.585-9.5975.698-5.549-1.54639-0.8321.882-10.072-13.630.7470.039
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-14.0-2.4-8.7-9.9-10.6-10.9-3.33.15.9-2.1-8.3-17.7-8.9-12.72.2-1.7-3.5-11.1-0.45.5-9.17.68.5-1.8-20.86.0-10.1-11.91.127.1-5.7-11.78.50.0-1.533.0-1698.00.00.0-11.811.80.0

None

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.626-1.062-4.092-1.614-11.179-7.216-5.217-2.6790.4270.76838-5.40116-29.0714.8259.453111.65460-5.5-0.1321.439-4.1780.18-5.0253.783-7.873-2.542-6.7957.4150.8570.0140.6937.31511271923-133.6388.088.255-6.229
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.4-0.8-1.8-1.0-8.3-4.7-3.8-1.90.30.523.9-3.812.0-20.42.95.36.71.352.5-5.2-0.11.2-3.40.1-4.33.0-6.9-2.4-8.09.71.10.01.00.011.222.740085.70.00.07.0130.00.0

us-gaap:IncomeTaxExpenseBenefit us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value7.657-1.056-1.0770.6252.8593.9169.689183.7155.4881991.338-1.0688.969
Percentage of IncomeTaxExpenseBenefit1223.299.426.3-38.7-25.6-54.3-185.7-692.5870.0714.6521.6-24.8-6.6-30.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax4.6-0.8-0.50.42.12.67.112.92.53.9124.61.0-0.86.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.2370.8370.9661.518-11.601-4.7394.095-1.4080.4260.7682.8058.284-3.7276.78
Percentage of IncomeTaxExpenseBenefit37.9-78.8-23.6-94.1103.865.7-78.552.699.8100.07.3-153.4-23.2-23.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.10.60.40.9-8.6-3.13.0-1.00.30.51.85.9-2.84.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.037-0.00.032-0.00.002-0.0-0.5960.001-0.0
Percentage of IncomeTaxExpenseBenefit5.90.0-0.80.0-0.00.011.4-0.0-0.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.0-0.00.0-0.00.0-0.0-0.40.0-0.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.0

us-gaap:IncomeTaxExpenseBenefit us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-7.305-0.843-4.013-3.757-2.439-6.393-18.405-19.824-3.714-5.488-163.832-14.75220-44.82
Percentage of IncomeTaxExpenseBenefit-1166.979.498.1232.821.888.6352.8740.0-869.8-714.6-428.3273.1129.8154.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-4.4-0.6-1.8-2.3-1.8-4.2-13.5-13.8-2.5-3.9-102.3-10.515.6-31.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-14.028-17.185-7.976-19.516-46.532-25.533-23.693-23.184128.24-27.7491.412-24.01626202524-0.618-62.963-9.89-26.66712163.676-14.39911-2.908-8.458-24.858110.743-0.8852.5241218553343-9.736191721
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-8.4-12.6-3.5-12.1-34.7-16.7-17.4-16.18.25.9-17.31.0-17.918.812.314.414.1-0.5-54.6-9.4-25.610.513.92.7-12.39.3-2.5-7.9-29.114.50.9-1.13.80.018.146.467993.90.00.017.1269.00.0

us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-6.305120.267-6.509-26.868-2.018-40.165-24.6014.1936.099-193.9575.1110.6128.11
Percentage of NetIncomeLoss44.9-74.1-3.333.457.77.9169.5106.134.774.0699.0362.0-2.530.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-3.89.30.1-4.0-20.0-1.3-29.4-17.12.84.4-121.13.60.55.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.704-1.4080.911-0.252-21.502-20.41524-30.0171.5521116-12.48-0.5-5.409
Percentage of NetIncomeLoss-12.18.2-11.41.346.280.0-101.5129.512.9141.6-58.0-883.92.1-20.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.0-1.00.4-0.2-16.0-13.417.6-20.91.18.410.0-8.9-0.4-3.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-14.028-17.185-7.976-19.516-46.532-25.533-23.693-23.184128.24-28.9670.314-26.48326
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0104.422.2110.3100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-8.4-12.6-3.5-12.1-34.7-16.7-17.4-16.18.25.9-18.10.2-19.718.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4.601-11.33-1.1786.76148221654-5.745-17.7681777.3692.355-2.701
Percentage of NetIncomeLoss-32.865.914.8-34.6-103.9-87.9-68.1-235.6-47.6-215.6-641.0521.9-9.8-10.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax2.8-8.3-0.54.236.114.711.838.0-3.9-12.7111.15.21.8-1.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-14.028-17.185-7.976-19.516-46.532-25.533-23.693-23.184128.24
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-8.4-12.6-3.5-12.1-34.7-16.7-17.4-16.18.25.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.0

None

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-3.644-36.52-7.328-22.804-42.992-21.274-37.98-19.4386.9126.136-30.2389.048-21.138301625250.447-63.953-10.281-27.822149.7355.952-16.58712-3.003-5.969-26.8028.263-1.9572.21.9381211553243
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-2.2-26.7-3.3-14.1-32.0-13.9-27.8-13.54.74.4-18.96.4-15.721.110.114.014.80.3-55.4-9.8-26.712.28.04.4-14.110.3-2.6-5.6-31.410.8-2.42.72.90.011.445.765785.70.0

us-gaap:ComprehensiveIncomeNetOfTax us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-6.305120.267-6.509-26.868-2.018-40.165-24.6014.1936.099-193.6615.1110.6128.11
Percentage of ComprehensiveIncomeNetOfTax173.0-34.9-3.628.562.59.5105.8126.660.799.4640.556.5-2.927.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-3.89.30.1-4.0-20.0-1.3-29.4-17.12.84.4-121.03.60.55.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.704-1.4080.911-0.252-21.502-20.41524-30.0141.5521116-11.4580.347-5.498
Percentage of ComprehensiveIncomeNetOfTax-46.83.9-12.41.150.096.0-63.3154.422.5190.8-55.5-126.6-1.6-18.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.0-1.00.4-0.2-16.0-13.417.6-20.91.18.410.5-8.10.3-3.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-3.644-36.52-7.328-22.804-42.992-21.274-37.98-19.4386.9126.136-31.4567.95-23.60530
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0104.087.9111.7100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-2.2-26.7-3.3-14.1-32.0-13.9-27.8-13.54.74.4-19.65.6-17.621.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ComprehensiveIncomeNetOfTax us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4.601-11.33-1.1786.76148221654-5.745-17.8061766.3471.508-2.612
Percentage of ComprehensiveIncomeNetOfTax-126.331.016.1-29.6-112.5-105.4-42.5-281.0-83.1-290.2-584.970.1-7.1-8.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax2.8-8.3-0.54.236.114.711.838.0-3.9-12.7110.54.51.1-1.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-14.166-17.323-8.114-19.654-46.67-25.671-23.831-23.322118.102-27.8871.274-24.15426202523-0.756-63.101-10.028-26.80512163.538-14.53711-3.046-8.596-24.996100.605-1.0232.3861218553343-13.144161318
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-8.5-12.7-3.6-12.2-34.8-16.8-17.5-16.28.15.8-17.40.9-18.018.712.314.314.0-0.6-54.7-9.6-25.710.413.72.6-12.49.1-2.7-8.1-29.314.30.7-1.23.60.017.946.367712.20.00.014.1215.30.0

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-6.305120.267-6.509-26.868-2.018-40.165-24.6014.1936.099-193.9575.1110.6128.11
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic44.5-73.5-3.333.157.67.9168.5105.535.175.3695.5401.2-2.530.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-3.89.30.1-4.0-20.0-1.3-29.4-17.12.84.4-121.13.60.55.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.704-1.4080.911-0.252-21.502-20.41524-30.0171.5521116-12.48-0.5-5.409
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic-12.08.1-11.21.346.179.5-100.9128.713.0144.0-57.7-979.62.1-20.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.0-1.00.4-0.2-16.0-13.417.6-20.91.18.410.0-8.9-0.4-3.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-14.166-17.323-8.114-19.654-46.67-25.671-23.831-23.322118.102-29.1050.176-26.62126
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0104.413.8110.2100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-8.5-12.7-3.6-12.2-34.8-16.8-17.5-16.28.15.8-18.20.1-19.818.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4.601-11.33-1.1786.76148221654-5.745-17.7681777.3692.355-2.701
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic-32.565.414.5-34.4-103.6-87.4-67.7-234.2-48.1-219.3-637.8578.4-9.7-10.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax2.8-8.3-0.54.236.114.711.838.0-3.9-12.7111.15.21.8-1.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:Assets

us-gaap:Assets


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2603276426372673267026942703271023922398236423962379240623712363227022392221228522922259226222522255225022322269227213801378140313901397139615151460141713821046
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value19481953196018771508153716601076117711621152
Percentage of Assets74.970.774.370.256.557.161.439.749.248.548.7
Percentage of Assets74.970.774.370.256.557.161.439.749.248.548.7
Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value130130136744504855001218535538532
Percentage of Assets5.04.75.22.816.918.018.545.022.422.522.5
Percentage of Assets5.04.75.22.816.918.018.545.022.422.522.5
Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value19512106194319541958200720402218186818681813
Percentage of Assets75.076.273.773.173.374.575.581.878.177.976.7
Percentage of Assets75.076.273.773.173.374.575.581.878.177.976.7
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-1427.779-1427.054-1402.577-1233.616-1246.401-1336.188-1497.801-1803.353-1189.262-1171.551-1133.66
Percentage of Assets-54.8-51.6-53.2-46.1-46.7-49.6-55.4-66.5-49.7-48.9-47.9
Percentage of Assets-54.8-51.6-53.2-46.1-46.7-49.6-55.4-66.5-49.7-48.9-47.9
Percentage of Assets srt:ConsolidationEliminations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:StatementBusinessSegments

hl:CasaBerardi


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value693698703717722739754758792802804814807804806799792782779776783789800796796805821864891
Percentage of Assets26.625.326.726.827.127.527.928.033.133.434.034.033.933.434.033.834.935.035.134.034.235.035.435.435.335.836.838.139.2
Percentage of Assets26.625.326.726.827.127.527.928.033.133.434.034.033.933.434.033.834.935.035.134.034.235.035.435.435.335.836.838.139.2
Percentage of Assets hl:CasaBerardi100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

hl:GreensCreek


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value618631639648643640637651678669671666674681681696693698698702715704704722731746744752747746741743738735729729753740771
Percentage of Assets23.822.824.224.324.123.823.624.028.427.928.427.828.328.328.729.530.631.231.430.731.231.231.132.132.433.233.333.132.954.153.853.053.152.752.248.151.653.673.7
Percentage of Assets23.822.824.224.324.123.823.624.028.427.928.427.828.328.328.729.530.631.231.430.731.231.231.132.132.433.233.333.132.954.153.853.053.152.752.248.151.653.673.7
Percentage of Assets hl:GreensCreek100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

hl:LuckyFriday


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value501488440438438440437429429432432432431439442437427420393389376369356347335325313221217221226240226217213214195170116
Percentage of Assets19.317.716.716.416.416.316.215.817.918.018.318.118.118.318.718.518.818.817.717.116.416.415.815.414.914.514.19.79.616.016.417.116.315.515.314.213.412.411.2
Percentage of Assets19.317.716.716.416.416.316.215.817.918.018.318.118.118.318.718.518.818.817.717.116.416.415.815.414.914.514.19.79.616.016.417.116.315.515.314.213.412.411.2
Percentage of Assets hl:LuckyFriday100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

hl:NevadaOperations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value5225225285585715755815390.0
Percentage of Assets20.118.920.020.921.421.321.519.90.0
Percentage of Assets20.118.920.020.921.421.321.519.90.0
Percentage of Assets hl:NevadaOperations100.0100.0100.0100.0100.0100.0100.0100.00.0

hl:SanSebastian


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value323548505354444768676255434733232425222.6121.529
Percentage of Assets1.31.31.81.92.02.01.61.72.92.82.62.31.82.01.41.01.11.21.00.10.1
Percentage of Assets1.31.31.81.92.02.01.61.72.92.82.62.31.82.01.41.01.11.21.00.10.1
Percentage of Assets hl:SanSebastian100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllOtherSegments


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-312009-12-31
Value233387277259240244249283424427393427423432407406332311328414417396400386391372353430416412410453470158
Percentage of Assets9.014.010.59.79.09.19.210.517.717.816.717.817.818.017.217.214.613.914.818.118.217.517.717.117.416.615.819.018.329.929.832.534.115.1
Percentage of Assets9.014.010.59.79.09.19.210.517.717.816.717.817.818.017.217.214.613.914.818.118.217.517.717.117.416.615.819.018.329.929.832.534.115.1
Percentage of Assets us-gaap:AllOtherSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:Liabilities

us-gaap:Liabilities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value94411079441056103110241012988891903881883876892891901891891882883880840865866913906905941937236240256245248255416417406420181
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets36.340.135.839.538.638.037.536.537.337.737.336.936.937.137.638.139.239.839.738.738.437.238.238.540.540.340.641.541.317.217.418.317.617.818.327.528.628.730.417.3

None

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2603276426372673267026942703271023922398236423962379240623712363227022392221228522922259226222522255225022322269227213801378140313901397139615151460141713821046
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value19481953196018771508153716601076117711621152
Percentage of LiabilitiesAndStockholdersEquity74.970.774.370.256.557.161.439.749.248.548.7
Percentage of Assets74.970.774.370.256.557.161.439.749.248.548.7
Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value130130136744504855001248535538532
Percentage of LiabilitiesAndStockholdersEquity5.04.75.22.816.918.018.546.122.422.522.5
Percentage of Assets5.04.75.22.816.918.018.546.122.422.522.5
Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities100.0100.0100.0100.0100.0100.0100.0102.5100.0100.0100.0

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value19512106194319541958200720402218186818681813
Percentage of LiabilitiesAndStockholdersEquity75.076.273.773.173.374.575.581.878.177.976.7
Percentage of Assets75.076.273.773.173.374.575.581.878.177.976.7
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-1427.779-1427.054-1402.577-1233.616-1246.401-1336.188-1497.801-1833.353-1189.262-1171.551-1133.66
Percentage of LiabilitiesAndStockholdersEquity-54.8-51.6-53.2-46.1-46.7-49.6-55.4-67.6-49.7-48.9-47.9
Percentage of Assets-54.8-51.6-53.2-46.1-46.7-49.6-55.4-67.6-49.7-48.9-47.9
Percentage of Assets srt:ConsolidationEliminations100.0100.0100.0100.0100.0100.0100.0101.7100.0100.0100.0

None

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value16581656169216161639167016901722150114941483151215021514147914611379134713381401141114191396138613411343132613271334114311371147114511491140962865649492
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets63.759.964.260.561.462.062.563.562.762.362.763.163.162.962.461.960.860.260.361.361.662.861.861.559.559.759.458.558.782.882.681.782.482.281.769.682.70.00.0

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1524153015171445120512321234904101110071000
Percentage of StockholdersEquity91.992.489.789.473.573.873.052.567.467.467.5
Percentage of Assets58.555.457.654.145.145.745.733.442.342.042.3
Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities78.278.477.477.079.980.174.484.185.886.786.8

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value11911711853300321342862368366357
Percentage of StockholdersEquity7.27.17.03.318.319.320.350.124.524.524.1
Percentage of Assets4.64.34.52.011.311.912.731.815.415.315.1
Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities91.289.987.172.166.766.368.570.868.868.167.0

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value16581656169216161639167016901722150114941483
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets63.759.964.260.561.462.062.563.562.762.362.7
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities85.078.687.182.783.783.282.977.680.380.081.8

us-gaap:StockholdersEquity us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-1643.53-1648.133-1636.802-1499.318-1506.079-1554.448-1577.564-1767.234-1379.384-1373.604-1358.025
Percentage of StockholdersEquity-99.1-99.5-96.7-92.7-91.9-93.0-93.3-102.6-91.9-91.9-91.5
Percentage of Assets-63.1-59.6-62.1-56.1-56.4-57.7-58.3-65.2-57.7-57.3-57.4
Percentage of Assets srt:ConsolidationEliminations115.1115.5116.7121.5120.8116.3105.398.0116.0117.2119.8

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-46.261-56.645-37.31-37.958-34.67-38.21-42.469-28.183-31.929-26.767-23.373-34.602-32.631-32.031-26.299-23.918-23.498-15.117-14.183-25.02212
Percentage of StockholdersEquity-2.8-3.4-2.2-2.3-2.1-2.3-2.5-1.6-2.1-1.8-1.6-2.3-2.4-2.3-2.0-2.1-2.1-1.6-1.6-3.92.4
Percentage of Assets-1.8-2.0-1.4-1.4-1.3-1.4-1.6-1.0-1.3-1.1-1.0-1.5-1.5-1.4-1.2-1.7-1.7-1.1-1.40.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value1982197619731897189518821880187216281626161915971519148614261218121511791121981725
Percentage of StockholdersEquity119.5119.3116.6117.4115.6112.7111.2108.8108.5108.8109.2107.9113.5106.4107.6107.1106.6122.6129.5151.1147.2
Percentage of Assets76.171.574.871.071.069.969.569.168.167.868.567.368.465.763.988.487.085.3107.10.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value13313213212412312212112110110110099959285717164594530
Percentage of StockholdersEquity8.18.07.87.77.57.37.27.06.86.86.86.77.16.66.56.36.36.76.96.96.2
Percentage of Assets5.14.85.04.64.64.54.54.54.24.24.34.24.34.13.85.25.14.75.70.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-387.688-371.958-353.331-343.958-323.079-275.188-248.308-223.28-198.762-209.696-195.484-167.437-232.565-141.306-154.982-123.288-120.557-265.577-300.915-351.7-274.877
Percentage of StockholdersEquity-23.4-22.4-20.9-21.3-19.7-16.5-14.7-13.0-13.2-14.0-13.2-11.3-17.4-10.1-11.7-10.8-10.6-27.6-34.8-54.2-55.8
Percentage of Assets-14.9-13.5-13.4-12.9-12.1-10.2-9.2-8.2-8.3-8.7-8.3-7.1-10.5-6.2-6.9-8.9-8.6-19.2-28.70.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-23.496-22.967-22.967-22.975-22.38-20.736-20.736-20.736-20.736-19.267-18.042-15.174-10.734-8.86-5.08-4.664-2.52-2.051-0.64-0.64-0.64
Percentage of StockholdersEquity-1.4-1.4-1.4-1.4-1.4-1.2-1.2-1.2-1.4-1.3-1.2-1.0-0.8-0.6-0.4-0.4-0.2-0.2-0.1-0.1-0.1
Percentage of Assets-0.9-0.8-0.9-0.9-0.8-0.8-0.8-0.8-0.9-0.8-0.8-0.6-0.5-0.4-0.2-0.3-0.2-0.1-0.10.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value214342179178145144164198352366320311291315303310311276269291299308316318346332343389399258282330339353362542522471432166
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.312.46.86.75.45.36.17.314.715.313.513.012.313.112.813.113.712.412.112.713.013.614.014.115.414.815.417.217.618.720.523.624.425.326.035.835.833.331.215.9

None

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value7521562329.43411276023921218617216417616916714313415517419119620922222220721223729616819023223327826641337732128321619711610436373
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.97.82.41.20.40.41.02.210.08.97.97.26.97.37.27.16.36.07.07.68.48.79.39.99.89.29.510.513.012.213.916.516.819.919.127.325.822.720.50.00.00.010.00.00.0

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value2416159.6082.1073.2698.6617.204242131192726
Percentage of CashAndCashEquivalentsAtCarryingValue32.37.924.629.122.327.731.611.810.29.916.711.117.015.7
Percentage of Assets0.90.60.60.40.10.10.30.31.00.91.30.81.21.1
Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities1.30.90.80.50.10.20.50.72.11.82.70.00.00.0

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value9.3298.457134.4047.3135.1271226515351533632
Percentage of CashAndCashEquivalentsAtCarryingValue12.33.921.413.377.543.545.543.721.725.427.531.122.518.9
Percentage of Assets0.40.30.50.20.30.20.51.02.22.32.22.21.51.4
Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities7.16.59.85.91.61.12.52.29.710.09.60.00.00.0

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value4219033180.0143.4016.26528163137103101100113
Percentage of CashAndCashEquivalentsAtCarryingValue55.488.254.057.50.128.822.946.168.164.755.858.461.266.7
Percentage of Assets1.66.91.30.70.00.10.21.06.85.74.44.24.24.8
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities2.29.01.71.00.00.20.31.38.77.45.70.00.00.0

None

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value266.062116.2226.8779.5864.184129.71719146.9829.183172026253013107.781271717212617348.306111721305.849102945503625
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.00.20.50.20.30.40.20.50.40.80.60.30.40.70.81.11.11.30.60.50.31.20.80.80.91.20.81.50.40.91.31.62.20.40.81.93.13.52.62.4

None

us-gaap:InventoryFinishedGoods

us-gaap:InventoryFinishedGoods


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value46393063454453423537283825302523282922202922252029222723181915119.786111314117.3538.88612
Percentage of InventoryFinishedGoods100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.81.41.22.41.71.72.01.61.51.51.21.61.11.31.11.01.21.31.00.91.31.01.10.91.31.01.21.00.81.41.10.80.70.91.01.00.80.50.61.2

None

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value9.567181110158.2391121171713168.9558.25612107.9999.2899.453151415127.5165.934138.3242018128.85812201421192.3362.6733.6834.578
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.70.50.40.60.30.40.80.70.70.60.70.40.30.50.40.40.40.40.70.60.70.50.30.30.60.40.90.80.90.60.91.41.11.61.30.20.20.30.4

None

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value235423932423245524852508252024872006200820202025203320322032202319261907189618781863183718311829181818051791177617421007996973953938923872855840833819
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets90.586.691.991.993.193.193.291.883.983.885.484.585.584.585.785.684.885.285.482.281.381.381.081.280.680.280.378.376.773.072.369.468.667.266.157.658.659.360.378.3

us-gaap:PropertyPlantAndEquipmentNet us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value23432380241024381785179217951246124612411244
Percentage of PropertyPlantAndEquipmentNet99.599.599.599.371.871.471.350.162.161.861.6
Percentage of Assets90.086.191.491.266.866.566.446.052.151.852.6
Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities120.3121.9123.0129.9118.4116.6108.2115.8105.8106.8107.9

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value9.3471011156987147221239758765773
Percentage of PropertyPlantAndEquipmentNet0.40.40.50.628.128.528.749.837.838.138.3
Percentage of Assets0.40.40.40.626.226.526.745.731.731.932.7
Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities7.18.28.320.8155.2147.0144.2101.7141.6142.1145.2

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1.9131.9131.9131.9131.9131.9131.9131.921.9271.9341.946
Percentage of PropertyPlantAndEquipmentNet0.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities0.10.10.10.10.10.10.10.10.10.10.1

None

us-gaap:LongTermInvestments

us-gaap:LongTermInvestments


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value124.9196.2077.3495.8156.7686.5837.197.4497.6527.5617.0984.7295.1045.0026.3564.4532.0861.5152.0032.6724.3344.927.0227.4668.737.0198.3648.7669.4299.6149.0232.6713.5843.9233.34.21.1942.157
Percentage of LongTermInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.20.20.30.20.30.20.30.30.30.30.30.20.20.20.30.20.10.10.10.10.20.20.30.30.40.30.40.40.70.70.60.20.30.30.20.30.10.2

None

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value16431648163614991506155415771767137913731358
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets63.159.662.156.156.457.758.365.257.757.357.4
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities84.278.284.276.776.977.477.379.773.873.574.9

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-1643.53-1648.133-1636.802-1499.318-1506.079-1554.448-1577.564-1767.234-1379.384-1373.604-1358.025
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0
Percentage of Assets-63.1-59.6-62.1-56.1-56.4-57.7-58.3-65.2-57.7-57.3-57.4
Percentage of Assets srt:ConsolidationEliminations115.1115.5116.7121.5120.8116.3105.398.0116.0117.2119.8

None

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1314161719200.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.50.50.60.60.70.80.0

None

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value4.0284.5077.3369.353101010142413146.3843.4372.6094.8842.5733.6382.7832.7833.0343.576109.4153.443.5779.2695.8671217141.8832.8557.7341117243.6544.6625.6049.225
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.30.30.40.40.40.51.00.60.60.30.10.10.20.10.20.10.10.10.20.50.40.20.20.40.30.60.81.10.10.20.60.81.21.60.30.30.40.9

None

us-gaap:EquitySecuritiesFvNi

us-gaap:EquitySecuritiesFvNi


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value124.96.27.35.86.86.67.27.47.77.6
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.20.20.30.20.30.20.30.30.30.3

None

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1151171161451171461361321051151121151131321271351291321271251098890101147151151177118909498919710725425324325641
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.44.24.45.54.45.45.04.94.44.84.74.84.85.55.45.75.75.95.75.54.83.94.04.56.56.76.87.85.26.56.97.06.67.07.716.817.417.218.64.0

us-gaap:LiabilitiesCurrent us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value15015415516512211811877776766
Percentage of LiabilitiesCurrent129.9132.1132.9113.5103.680.787.358.473.358.459.4
Percentage of Assets5.85.65.96.24.64.44.42.93.22.82.8
Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities7.77.97.98.88.17.77.27.26.65.85.8

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3.9875.6828.3341044494555393837
Percentage of LiabilitiesCurrent3.44.87.17.338.033.733.741.837.233.433.6
Percentage of Assets0.20.20.30.41.71.81.72.01.61.61.6
Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities3.04.36.114.49.910.29.24.57.37.27.1

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-284.257-292.781-309.293-298.754-314.607-247.045-234.133-79.535-212.784-203.947-226.576
Percentage of LiabilitiesCurrent-245.8-249.8-264.4-204.8-266.9-168.3-171.9-60.0-202.0-175.9-202.1
Percentage of Assets-10.9-10.6-11.7-11.2-11.8-9.2-8.7-2.9-8.9-8.5-9.6
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities-14.6-13.9-15.9-15.3-16.1-12.3-11.5-3.6-11.4-10.9-12.5

us-gaap:LiabilitiesCurrent us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value24926226522520579201213234
Percentage of LiabilitiesCurrent212.9224.4225.4153.8150.959.8191.5184.0209.1
Percentage of Assets9.010.09.98.47.62.98.48.99.9
Percentage of Assets srt:ConsolidationEliminations-17.5-18.7-21.3-16.9-13.7-4.4-17.0-18.2-20.7

us-gaap:MaterialReconcilingItems


None
Period End2020-06-302019-12-312019-09-302018-12-31
Value245262268205
Percentage of LiabilitiesCurrent212.5224.4184.0150.9
Percentage of Assets9.410.010.07.6
Percentage of Assets us-gaap:MaterialReconcilingItems0.00.00.00.0

None

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value40495757696177655351464647516057575651474439414539395156603743393430375144263113
Percentage of AccountsPayableAndAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.61.82.22.22.62.32.92.42.32.22.02.02.02.22.52.42.52.52.32.11.91.81.92.01.71.72.32.52.72.73.12.82.52.22.73.43.01.92.31.3

None

us-gaap:TaxesPayableCurrent

us-gaap:TaxesPayableCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value8.4515.8424.7762.161.4349.1097.7278.2746.1437.2735.9195.08114119.0615.994.3448.9588.9157.0782.423.8914.2416.31910127.8813.7295.3129.824129.7433.73613109.7669.67814166.24
Percentage of TaxesPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.20.20.10.10.30.30.30.30.30.30.20.60.50.40.30.20.40.40.30.10.20.20.30.50.60.40.20.20.70.90.70.30.90.70.60.71.01.20.6

None

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value4162000.04792000.05580000.05864000.06628000.06701000.00
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.20.20.20.20.20.20.0

None

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value0.1267.6616.1728.5280.8986.6965.9371.2051.3887.066107.9681118101710166.884156.236145.797158.057156.781178.113.335
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.30.20.30.00.20.20.00.10.30.40.30.50.80.40.70.50.70.30.70.30.70.30.70.40.70.30.80.40.2

None

us-gaap:LongTermDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LongTermDebt

hl:The2028SeniorNotes, us-gaap:SeniorNotes


None
Period End2020-06-302020-03-31
Value468469
Percentage of LongTermDebt100.0100.0
Percentage of Assets18.017.0
Percentage of Assets hl:The2028SeniorNotes us-gaap:SeniorNotes0.00.0

us-gaap:LongTermDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

hl:IQNotes, us-gaap:SeniorNotes, us-gaap:SubsequentEvent


None
Period End2020-07-09
Value48
Percentage of LongTermDebt0.0
Percentage of Assets0.0
Percentage of Assets hl:IQNotes us-gaap:SeniorNotes us-gaap:SubsequentEvent0.0

None

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:LongTermDebtAndCapitalLeaseObligations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312011-03-312010-12-31
Value5346945226046075565405425415405085095064.0043.792
Percentage of LongTermDebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets20.525.119.822.622.720.720.020.022.722.521.521.321.40.30.3

us-gaap:LongTermDebtAndCapitalLeaseObligations us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1515171918191414.9115.8253.6822.303
Percentage of LongTermDebtAndCapitalLeaseObligations3.02.23.33.23.03.526.20.91.10.70.5
Percentage of Assets0.60.60.70.70.70.75.20.20.20.20.1
Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities0.80.80.91.01.21.38.50.50.50.30.2

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.2880.5430.7610.8762.1973.5841.9891372.9323.4123.89
Percentage of LongTermDebtAndCapitalLeaseObligations0.10.10.10.10.40.60.425.40.50.60.8
Percentage of Assets0.00.00.00.00.10.10.15.10.10.10.2
Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities0.20.40.61.20.50.70.411.30.50.60.7

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value518679504584586533532534533533502
Percentage of LongTermDebtAndCapitalLeaseObligations97.097.796.696.796.695.898.598.498.498.798.8
Percentage of Assets19.924.619.121.922.019.819.719.722.322.221.2
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities26.632.226.029.930.026.626.124.128.528.527.7

us-gaap:LongTermDebtAndCapitalLeaseObligations us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-30
Value0.00.00.00.00.0-135.988-134.211
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.0-25.2-24.7
Percentage of Assets0.00.00.00.00.0-5.0-5.0
Percentage of Assets srt:ConsolidationEliminations-0.0-0.0-0.0-0.0-0.09.17.4

None

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


None
Period End2020-06-302020-03-312019-12-31
Value128126138
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0
Percentage of Assets4.94.65.2

us-gaap:DeferredIncomeTaxLiabilitiesNet us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-31
Value158154166
Percentage of DeferredIncomeTaxLiabilitiesNet123.3122.5120.4
Percentage of Assets6.15.66.3
Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities8.17.98.5

us-gaap:DeferredIncomeTaxLiabilitiesNet us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-31
Value-29.951-28.427-28.267
Percentage of DeferredIncomeTaxLiabilitiesNet-23.3-22.5-20.4
Percentage of Assets-1.2-1.0-1.1
Percentage of Assets srt:ConsolidationEliminations2.12.02.0

None

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-31
Value58575650484947444848464347464443474546433130
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.32.12.11.91.81.81.81.62.02.02.01.82.01.91.91.92.12.02.11.91.42.2

None

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2.435146.8568.1135.9746.7939.894.6894.4382.78412116.4145.321117.6265.3623.5396.19505147534235343739413740333230301516151610
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.50.30.30.20.30.40.20.20.10.50.50.30.20.50.30.20.20.32.22.22.12.31.91.61.51.71.71.82.72.92.42.32.22.21.11.11.11.21.0

None

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value9.07910101112130.0
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.30.40.40.40.50.50.0

None

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value16581656169216161639167016901722150114941483151215021514147914611379134713381401141114191396138613411343132613271334114311371147114511491140962865649492
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets63.759.964.260.561.462.062.563.562.762.362.763.163.162.962.461.960.860.260.361.361.662.861.861.559.559.759.458.558.782.882.681.782.482.281.769.682.70.00.0

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1524153015171445120512321234904101110071000
Percentage of StockholdersEquity91.992.489.789.473.573.873.052.567.467.467.5
Percentage of Assets58.555.457.654.145.145.745.733.442.342.042.3
Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities78.278.477.477.079.980.174.484.185.886.786.8

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value11911711853300321342862368366357
Percentage of StockholdersEquity7.27.17.03.318.319.320.350.124.524.524.1
Percentage of Assets4.64.34.52.011.311.912.731.815.415.315.1
Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities91.289.987.172.166.766.368.570.868.868.167.0

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value16581656169216161639167016901722150114941483
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets63.759.964.260.561.462.062.563.562.762.362.7
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities85.078.687.182.783.783.282.977.680.380.081.8

us-gaap:StockholdersEquity us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-1643.53-1648.133-1636.802-1499.318-1506.079-1554.448-1577.564-1767.234-1379.384-1373.604-1358.025
Percentage of StockholdersEquity-99.1-99.5-96.7-92.7-91.9-93.0-93.3-102.6-91.9-91.9-91.5
Percentage of Assets-63.1-59.6-62.1-56.1-56.4-57.7-58.3-65.2-57.7-57.3-57.4
Percentage of Assets srt:ConsolidationEliminations115.1115.5116.7121.5120.8116.3105.398.0116.0117.2119.8

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-46.261-56.645-37.31-37.958-34.67-38.21-42.469-28.183-31.929-26.767-23.373-34.602-32.631-32.031-26.299-23.918-23.498-15.117-14.183-25.02212
Percentage of StockholdersEquity-2.8-3.4-2.2-2.3-2.1-2.3-2.5-1.6-2.1-1.8-1.6-2.3-2.4-2.3-2.0-2.1-2.1-1.6-1.6-3.92.4
Percentage of Assets-1.8-2.0-1.4-1.4-1.3-1.4-1.6-1.0-1.3-1.1-1.0-1.5-1.5-1.4-1.2-1.7-1.7-1.1-1.40.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value1982197619731897189518821880187216281626161915971519148614261218121511791121981725
Percentage of StockholdersEquity119.5119.3116.6117.4115.6112.7111.2108.8108.5108.8109.2107.9113.5106.4107.6107.1106.6122.6129.5151.1147.2
Percentage of Assets76.171.574.871.071.069.969.569.168.167.868.567.368.465.763.988.487.085.3107.10.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value13313213212412312212112110110110099959285717164594530
Percentage of StockholdersEquity8.18.07.87.77.57.37.27.06.86.86.86.77.16.66.56.36.36.76.96.96.2
Percentage of Assets5.14.85.04.64.64.54.54.54.24.24.34.24.34.13.85.25.14.75.70.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-387.688-371.958-353.331-343.958-323.079-275.188-248.308-223.28-198.762-209.696-195.484-167.437-232.565-141.306-154.982-123.288-120.557-265.577-300.915-351.7-274.877
Percentage of StockholdersEquity-23.4-22.4-20.9-21.3-19.7-16.5-14.7-13.0-13.2-14.0-13.2-11.3-17.4-10.1-11.7-10.8-10.6-27.6-34.8-54.2-55.8
Percentage of Assets-14.9-13.5-13.4-12.9-12.1-10.2-9.2-8.2-8.3-8.7-8.3-7.1-10.5-6.2-6.9-8.9-8.6-19.2-28.70.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-23.496-22.967-22.967-22.975-22.38-20.736-20.736-20.736-20.736-19.267-18.042-15.174-10.734-8.86-5.08-4.664-2.52-2.051-0.64-0.64-0.64
Percentage of StockholdersEquity-1.4-1.4-1.4-1.4-1.4-1.2-1.2-1.2-1.4-1.3-1.2-1.0-0.8-0.6-0.4-0.4-0.2-0.2-0.1-0.1-0.1
Percentage of Assets-0.9-0.8-0.9-0.9-0.8-0.8-0.8-0.8-0.9-0.8-0.8-0.6-0.5-0.4-0.2-0.3-0.2-0.1-0.10.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:CommonStockValue

us-gaap:CommonStockValue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value1331321321241231221211211011011001001009999999796959594939292878585858571717171717170696459
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.14.85.04.64.64.54.54.54.24.24.34.24.24.24.24.24.34.34.34.24.14.14.14.13.93.83.83.83.85.25.25.15.15.15.14.64.94.75.7

None

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1982197619731897189518821880187216281626161916171614160315971594153815281519151715151495148614841447143114261425142412191218121712161215121511811180118011791121
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets76.171.574.871.071.069.969.569.168.167.868.567.567.966.667.367.567.768.368.466.466.166.265.765.964.263.663.962.862.788.388.486.787.587.087.078.080.983.385.3107.1

None

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value-387690000.0-371960000.0-353330000.0-343960000.0-323080000.0-275190000.0-248310000.0-223280000.0-176160000.0-187090000.0-195480000.0-166600000.0-166880000.0-141730000.0-167440000.0-186580000.0-211260000.0-234270000.0-232560000.0-168520000.0-157550000.0-129820000.0-141310000.0-157150000.0-159750000.0-144360000.0-154980000.0-151080000.0-141630000.0-115900000.0-123290000.0-117470000.0-115730000.0-111690000.0-120560000.0-133400000.0-189180000.0-222360000.0-265580000.0-300920000.0
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-14.9-13.5-13.4-12.9-12.1-10.2-9.2-8.2-7.4-7.8-8.3-7.0-7.0-5.9-7.1-7.9-9.3-10.5-10.5-7.4-6.9-5.7-6.2-7.0-7.1-6.4-6.9-6.7-6.2-8.4-8.9-8.4-8.3-8.0-8.6-8.8-13.0-15.7-19.2-28.7

None

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value-46261000.0-56645000.0-37310000.0-37958000.0-34670000.0-38210000.0-42469000.0-28183000.0-31929000.0-26767000.0-23373000.0-20884000.0-28520000.0-31398000.0-34602000.0-30942000.0-30327000.0-31566000.0-32631000.0-31640000.0-31250000.0-30095000.0-32031000.0-24894000.0-27137000.0-24949000.0-26299000.0-27565000.0-28694000.0-26577000.0-23918000.0-21219000.0-24304000.0-23717000.0-23498000.0-16640000.0-15843000.0-14761000.0-15117000.0-14183000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-1.8-2.0-1.4-1.4-1.3-1.4-1.6-1.0-1.3-1.1-1.0-0.9-1.2-1.3-1.5-1.3-1.3-1.4-1.5-1.4-1.4-1.3-1.4-1.1-1.2-1.1-1.2-1.2-1.3-1.9-1.7-1.5-1.7-1.7-1.7-1.1-1.1-1.0-1.1-1.4

None

us-gaap:TreasuryStockValue

us-gaap:TreasuryStockValue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value23222222222020202019181817151515141110109.8019.8018.868.866.625.1195.085.085.084.954.6643.0182.7232.522.522.522.522.0692.0510.64
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.90.80.90.90.80.80.80.80.90.80.80.80.70.70.60.60.60.50.50.50.40.40.40.40.30.20.20.20.20.40.30.20.20.20.20.20.20.10.10.1

None

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value374.9275754-11.317201928301641287.536385286671827263021241.739263021-5.195-1.085112.52835-10.18641-118.04760666082405617
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax22.63.625.534.0-8.413.113.919.620.811.726.120.15.626.931.848.539.314.323.825.529.518.020.01.322.724.218.9-4.9-1.314.93.143.1-15.20.0-114.850.4135320.40.00.035.1897.40.0

us-gaap:NetCashProvidedByUsedInOperatingActivities us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value44336689-33.76736-25.682.9914218-139.117272.28411
Percentage of NetCashProvidedByUsedInOperatingActivities117.6670.5116.7162.7298.4182.1-135.110.6137.3114.4-333.196.430.330.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax26.524.129.755.3-25.223.9-18.82.128.613.4-86.919.41.78.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-13.6421932-27.65629-17.55350-17.273-11.23139810-4.88515
Percentage of NetCashProvidedByUsedInOperatingActivities-36.4402.556.6-50.4-264.8-87.6266.2-61.3-36.781.8236.137.7-64.840.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-8.214.514.4-17.122.3-11.537.1-12.0-7.69.661.67.6-3.611.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value5.033-13.285-22.2728-129.514-38.87929-80.4546.79821-170.66426-31.82240
Percentage of NetCashProvidedByUsedInOperatingActivities13.4-269.6-38.951.51144.4-194.1154.3-285.422.2129.3-408.694.1-422.3107.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax3.0-9.7-9.917.5-96.5-25.521.5-56.04.615.2-106.618.9-23.728.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetCashProvidedByUsedInOperatingActivities us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2.009-34.653-19.71-10.6319739-35.261122-6.991-36.943252-36.29641-29.818
Percentage of NetCashProvidedByUsedInOperatingActivities5.4-703.3-34.4-19.4-862.1199.6-185.5436.0-22.8-225.5605.7-128.3556.8-77.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.2-25.3-8.8-6.672.726.2-25.885.6-4.7-26.4158.0-25.831.2-20.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-11410000.0-19716000.0-23986000.0-24554000.0-38257000.0-33070000.0-51959000.0-169400000.02978000.0-18165000.0-26161000.0-15590000.0-24568000.0-29076000.0-45339000.0-57535000.0-57452000.0-38339000.0-41728000.0-37003000.0-31995000.0-27880000.0-31859000.0-33607000.0-23537000.0-29352000.0-37698000.0-52605000.0-356990000.0-28201000.0-34203000.0-32416000.0-26802000.0-24617000.0-23105000.0-23801000.0-9365000.0-23548000.0-18677000.0-20861000.0-19656000.0-5594000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-6.9-14.4-10.7-15.2-28.5-21.7-38.1-117.92.0-13.0-16.3-11.1-18.3-20.4-27.6-32.1-33.5-29.3-36.2-35.3-30.7-23.4-26.1-24.8-20.0-23.3-33.0-49.3-418.4-36.9-42.2-39.6-40.00.0-22.5-19.7-19112.20.00.0-18.0-309.50.0

None

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-165.85169-4.432-6.60646-2.6470.796-37.969-5.05227-2.462-3.8595.087-4.014-4.241-4.549-0.096-3.135-3.886-5.127-3.717-4.413-3.533349.384-3.866-2.802-2.559485-5.529-9.535-3.965-8.189-4.768-6.128-0.613-1.1680.6943.37-0.62243-0.537
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-99.7124.0-2.0-4.134.9-1.70.6-26.4-3.419.6-1.5-2.73.8-2.8-2.6-2.5-0.1-2.4-3.4-4.9-3.6-3.7-2.925.58.0-3.1-2.5-2.4569.4-7.2-11.8-4.8-12.20.0-6.0-0.5-2383.70.00.0-0.5688.00.0

None

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-139.7921532923-2.363-15.592-33.452-178.8612726138.788-13.7757.009
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-84.0112.013.114.6-1.8-10.2-24.5-124.518.418.98.26.2-10.34.9

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value7.5391.6555.749-1.071-1.162-5.3920.813-16.5213.29-9.9465.396
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect-5.41.119.5-4.549.234.6-2.49.212.1-37.677.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax4.51.22.6-0.7-0.9-3.50.6-11.52.2-7.13.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value0.872-4.8888.9415.6642.186-7.336-12.449-27.065-1.9912.75610
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect-0.6-3.230.424.0-92.547.037.215.1-7.310.4147.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.5-3.64.03.51.6-4.8-9.1-18.8-1.42.07.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value-148.2031561418-3.387-2.864-21.816-135.2752533-8.749
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect106.0102.150.180.5143.318.465.275.695.2127.2-124.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-89.1114.36.611.7-2.5-1.9-16.0-94.217.624.1-6.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value374.9275754-11.317201928301641287.536385286671827263021241.739263021-5.195-1.085112.52835-10.18641-118.04760666082405617
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax22.63.625.534.0-8.413.113.919.620.811.726.120.15.626.931.848.539.314.323.825.529.518.020.01.322.724.218.9-4.9-1.314.93.143.1-15.20.0-114.850.4135320.40.00.035.1897.40.0

us-gaap:NetCashProvidedByUsedInOperatingActivities us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value44336689-33.76736-25.682.9914218-139.117272.28411
Percentage of NetCashProvidedByUsedInOperatingActivities117.6670.5116.7162.7298.4182.1-135.110.6137.3114.4-333.196.430.330.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax26.524.129.755.3-25.223.9-18.82.128.613.4-86.919.41.78.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-13.6421932-27.65629-17.55350-17.273-11.23139810-4.88515
Percentage of NetCashProvidedByUsedInOperatingActivities-36.4402.556.6-50.4-264.8-87.6266.2-61.3-36.781.8236.137.7-64.840.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-8.214.514.4-17.122.3-11.537.1-12.0-7.69.661.67.6-3.611.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value5.033-13.285-22.2728-129.514-38.87929-80.4546.79821-170.66426-31.82240
Percentage of NetCashProvidedByUsedInOperatingActivities13.4-269.6-38.951.51144.4-194.1154.3-285.422.2129.3-408.694.1-422.3107.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax3.0-9.7-9.917.5-96.5-25.521.5-56.04.615.2-106.618.9-23.728.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetCashProvidedByUsedInOperatingActivities us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2.009-34.653-19.71-10.6319739-35.261122-6.991-36.943252-36.29641-29.818
Percentage of NetCashProvidedByUsedInOperatingActivities5.4-703.3-34.4-19.4-862.1199.6-185.5436.0-22.8-225.5605.7-128.3556.8-77.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.2-25.3-8.8-6.672.726.2-25.885.6-4.7-26.4158.0-25.831.2-20.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-14.028-17.185-7.976-19.516-46.532-25.533-23.693-23.184128.24-27.7491.412-24.01626202524-0.618-62.963-9.89-26.66712163.676-14.39911-2.908-8.458-24.858110.743-0.8852.5241218553343-9.736191721
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-8.4-12.6-3.5-12.1-34.7-16.7-17.4-16.18.25.9-17.31.0-17.918.812.314.414.1-0.5-54.6-9.4-25.610.513.92.7-12.39.3-2.5-7.9-29.114.50.9-1.13.80.018.146.467993.90.00.017.1269.00.0

us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-6.305120.267-6.509-26.868-2.018-40.165-24.6014.1936.099-193.9575.1110.6128.11
Percentage of NetIncomeLoss44.9-74.1-3.333.457.77.9169.5106.134.774.0699.0362.0-2.530.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-3.89.30.1-4.0-20.0-1.3-29.4-17.12.84.4-121.13.60.55.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:GuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.704-1.4080.911-0.252-21.502-20.41524-30.0171.5521116-12.48-0.5-5.409
Percentage of NetIncomeLoss-12.18.2-11.41.346.280.0-101.5129.512.9141.6-58.0-883.92.1-20.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.0-1.00.4-0.2-16.0-13.417.6-20.91.18.410.0-8.9-0.4-3.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-14.028-17.185-7.976-19.516-46.532-25.533-23.693-23.184128.24-28.9670.314-26.48326
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0104.422.2110.3100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-8.4-12.6-3.5-12.1-34.7-16.7-17.4-16.18.25.9-18.10.2-19.718.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ParentCompany srt:ReportableLegalEntities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4.601-11.33-1.1786.76148221654-5.745-17.7681777.3692.355-2.701
Percentage of NetIncomeLoss-32.865.914.8-34.6-103.9-87.9-68.1-235.6-47.6-215.6-641.0521.9-9.8-10.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax2.8-8.3-0.54.236.114.711.838.0-3.9-12.7111.15.21.8-1.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-14.028-17.185-7.976-19.516-46.532-25.533-23.693-23.184128.24
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-8.4-12.6-3.5-12.1-34.7-16.7-17.4-16.18.25.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.0

None

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value424161525040324533293430272933263026312827253127272627202014141311111211111214151516
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value16-9.9550.724-2.5577.7095.063-14.2676.895-9.7377.2667.317-6.053-7.5888.7381.543-21.686-4.126203.8835.42-10.6798.217.861-2.554-7.011-1.387-13.39823-4.409-4.708-4.795-7.3324-8.014-24.276165.113-13.39512-26.40816-12.241
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInInventories


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-2.0226.602-22.6476.3543.318-3.1718.558120.1036.762-5.86711-4.9523.3585.653-5.758-0.125.9225.236-7.7997.366-3.9496.006-9.5437.087-4.6694.5845.524-8.7095.1083.4671.988-1.065-1.9480.4563.7524.166-1.312.847-3.7192.3440.863
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-1.277-3.863-6.505-4.396-12.897-8.293-5.802-2.759-2.539-0.43842-1.4420.16-21.789-7.052-0.4437.3633.14556-1.175-1.3470.6347.8790.955-4.06-2.872-6.2172.985-7.9383.992.569-5.6270.722.82616221423-143.7771.8016.38-6.344
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1209000.01219000.0910000.01206000.01972000.01580000.01606000.02231000.01314000.01127000.01380000.02112000.01482000.01349000.01370000.01347000.02236000.01231000.01389000.01775000.01201000.01060000.01139000.01265000.01496000.01065000.01208000.01383000.01072000.0798000.0805000.0801000.0937000.0558000.0576000.0577000.0543000.0377000.0110000.0863000.02140000.0333000.0
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:AmortizationOfFinancingCosts

us-gaap:AmortizationOfFinancingCosts


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value484000.02140000.0718000.0667000.0627000.0625000.0606000.0573000.0449000.0449000.0449000.0448000.0487000.0480000.0474000.0471000.0467000.0459000.0456000.0455000.0456000.0454000.0480000.0568000.0616000.0519000.0530000.0508000.0262000.0135000.0136000.0123000.0101000.0100000.0100000.0166000.0166000.0166000.0
Percentage of AmortizationOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-11410000.0-19716000.0-23986000.0-24554000.0-38257000.0-33070000.0-51959000.0-169400000.02978000.0-18165000.0-26161000.0-15590000.0-24568000.0-29076000.0-45339000.0-57535000.0-57452000.0-38339000.0-41728000.0-37003000.0-31995000.0-27880000.0-31859000.0-33607000.0-23537000.0-29352000.0-37698000.0-52605000.0-356990000.0-28201000.0-34203000.0-32416000.0-26802000.0-24617000.0-23105000.0-23801000.0-9365000.0-23548000.0-18677000.0-20861000.0-19656000.0-5594000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-6.9-14.4-10.7-15.2-28.5-21.7-38.1-117.92.0-13.0-16.3-11.1-18.3-20.4-27.6-32.1-33.5-29.3-36.2-35.3-30.7-23.4-26.1-24.8-20.0-23.3-33.0-49.3-418.4-36.9-42.2-39.6-40.00.0-22.5-19.7-19112.20.00.0-18.0-309.50.0

None

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value10192426383353392517272424214443423442373126313330263752342531292624232318211820216.732
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1119604.18526255014178.082189.088117.54
Percentage of PaymentsToAcquirePropertyPlantAndEquipment104.696.0249.416.070.176.894.835.767.745.866.437.247.734.8

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-0.4980.802-35.97421117.672.809258.2979.5539.298151214
Percentage of PaymentsToAcquirePropertyPlantAndEquipment-4.64.0-149.484.029.923.25.264.332.354.233.662.852.365.2

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-30
Value0.0-0.00.00.00.0-0.0-20.71
Percentage of PaymentsToAcquirePropertyPlantAndEquipment0.0-0.00.00.00.0-0.0-51.8

None

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-165.85169-4.432-6.60646-2.6470.796-37.969-5.05227-2.462-3.8595.087-4.014-4.241-4.549-0.096-3.135-3.886-5.127-3.717-4.413-3.533349.384-3.866-2.802-2.559485-5.529-9.535-3.965-8.189-4.768-6.128-0.613-1.1680.6943.37-0.62243-0.537
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-99.7124.0-2.0-4.134.9-1.70.6-26.4-3.419.6-1.5-2.73.8-2.8-2.6-2.5-0.1-2.4-3.4-4.9-3.6-3.7-2.925.58.0-3.1-2.5-2.4569.4-7.2-11.8-4.8-12.20.0-6.0-0.5-2383.70.00.0-0.5688.00.0

None

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:ProceedsFromIssuanceOfLongTermDebt


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312013-12-312013-09-30
Value0.067934751125824470.0310.00.0
Percentage of ProceedsFromIssuanceOfLongTermDebt0.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.0

us-gaap:ProceedsFromIssuanceOfLongTermDebt us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.067934751125824470.031
Percentage of ProceedsFromIssuanceOfLongTermDebt0.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:ProceedsFromIssuanceOfLongTermDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

hl:The2028SeniorNotes, us-gaap:SeniorNotes


None
Period End2020-03-19
Value469
Percentage of ProceedsFromIssuanceOfLongTermDebt0.0

None

us-gaap:PaymentsOfDividends

us-gaap:PaymentsOfDividends


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value1.4561.4421.3961.3641.3581.3481.3381.3311.141.1361.1361.1351.131.1271.1231.1061.11.091.0561.0520.9960.9950.9954.4150.138
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDividends us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.4561.4421.3961.3641.3581.3481.3381.3311.141.1361.1361.1351.131.127
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsCommonStock


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value1.3181.3041.2591.2251.2211.2091.21.1931.0020.9980.9980.9970.9920.9890.9850.9680.9620.9520.9430.9460.9260.9240.9180.9140.8580.857
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

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

us-gaap:DebtInstrumentInterestRateStatedPercentage

hl:The2028SeniorNotes, us-gaap:SeniorNotes


None
Period End2020-02-19
Value0.0725
Percentage of DebtInstrumentInterestRateStatedPercentage100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations hl:The2028SeniorNotes us-gaap:SeniorNotes0.0

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

hl:IQNotes, us-gaap:SeniorNotes, us-gaap:SubsequentEvent


None
Period End2020-07-09
Value0.06515
Percentage of DebtInstrumentInterestRateStatedPercentage0.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations hl:IQNotes us-gaap:SeniorNotes us-gaap:SubsequentEvent0.0

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument, us-gaap:SubsequentEventType

hl:TheIQNotes, us-gaap:SubsequentEvent


None
Period End2020-07-09
Value0.06515
Percentage of DebtInstrumentInterestRateStatedPercentage0.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations hl:TheIQNotes us-gaap:SubsequentEvent0.0

None

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

us-gaap:PerformanceShares


None
Period End2020-03-312019-04-30
Value2800100.03597400.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod us-gaap:AwardType, us-gaap:Vesting

us-gaap:RestrictedStockUnitsRSU, hl:AwardsVestingInJune2021AndJune2020


None
Period End2020-06-30
Value90760.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod0.0

us-gaap:RestrictedStockUnitsRSU, hl:AwardsVestingInJune2021June2022AndJune2023


None
Period End2020-06-30
Value1176900.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod0.0

us-gaap:RestrictedStockUnitsRSU, hl:AwardsVestingJune2021


None
Period End2020-06-30
Value37620.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod0.0

None

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312011-12-312010-12-31
Value1251231351391441561711621111161207876728797857665132329424450515329
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilities us-gaap:IncomeTaxAuthority, us-gaap:IncomeTaxAuthorityName

us-gaap:DomesticCountry, us-gaap:InternalRevenueServiceIRS


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value3537434551460.30.3
Percentage of DeferredTaxLiabilities28.030.030.931.333.028.70.30.3

us-gaap:ForeignCountry, us-gaap:CanadaRevenueAgency


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-30
Value9389100102107118112116122121121125
Percentage of DeferredTaxLiabilities74.672.471.871.069.072.5101.1100.6157.3158.2166.7128.3

us-gaap:ForeignCountry, us-gaap:MexicanTaxAuthority


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-06-30
Value3.23.03.73.43.11.5
Percentage of DeferredTaxLiabilities2.52.42.62.32.01.3

hl:AnnualDividendPerShare us-gaap:Dividends

hl:AnnualDividendPerShare

hl:QuarterlyAverageRealizedPriceLevel1


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value00.040000.040000.040000.040
Percentage of AnnualDividendPerShare0.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.0

hl:QuarterlyAverageRealizedPriceLevel2


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value00.080000.080000.080000.080
Percentage of AnnualDividendPerShare0.0200.00.00.00.0200.00.00.00.0200.00.00.00.0200.00.0

hl:QuarterlyAverageRealizedPriceLevel3


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value00.120000.120000.120000.120
Percentage of AnnualDividendPerShare0.0300.00.00.00.0300.00.00.00.0300.00.00.00.0300.00.0

hl:QuarterlyAverageRealizedPriceLevel4


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value00.160000.160000.160000.160
Percentage of AnnualDividendPerShare0.0400.00.00.00.0400.00.00.00.0400.00.00.00.0400.00.0

hl:QuarterlyAverageRealizedPriceLevel5


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value00.20000.20000.20000.20
Percentage of AnnualDividendPerShare0.0500.00.00.00.0500.00.00.00.0500.00.00.00.0500.00.0

hl:CostOfGoodsSoldBeforeDepreciationDepletionAndAmortization

hl:CostOfGoodsSoldBeforeDepreciationDepletionAndAmortization


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value92851399510411010793807280687778879482747279
Percentage of CostOfGoodsSoldBeforeDepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

hl:CostOfGoodsSoldBeforeDepreciationDepletionAndAmortization us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value88781268558667639373445294042
Percentage of CostOfGoodsSoldBeforeDepreciationDepletionAndAmortization95.591.791.289.556.260.671.642.446.647.656.442.952.754.4

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3.1046.852119.57745432953423835393635
Percentage of CostOfGoodsSoldBeforeDepreciationDepletionAndAmortization3.38.08.210.043.539.027.857.453.353.044.558.147.145.4

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.0440.2840.7580.4720.2570.4610.6910.1570.073-0.475-0.745-0.6870.1860.148
Percentage of CostOfGoodsSoldBeforeDepreciationDepletionAndAmortization1.10.30.50.50.20.40.60.20.1-0.7-0.9-1.00.20.2

hl:EmployeeLaborStrikeRelatedCosts

hl:EmployeeLaborStrikeRelatedCosts


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value9.572123.2853.7222.2662.7782.3566.5196.8015.0176.9164.788.0241.581
Percentage of EmployeeLaborStrikeRelatedCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

hl:Exploration

hl:Exploration


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.9622.532.3634.8084.3464.4028.086127.8387.365.8887.2555.8534.5144.5493.8593.3622.952.9975.544.5924.6154.6125.7973.144.154.9915.7976.2216.4937.343117.1465.6117.9479.8725.8393.3015.4396.9175.823.429
Percentage of Exploration100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

hl:ExplorationAndPredevelopmentCosts

hl:ExplorationAndPredevelopmentCosts


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312013-09-302012-09-30
Value2.5253.0652.9785.6895.1445.2589.358139.2538.3659.24117
Percentage of ExplorationAndPredevelopmentCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

hl:ExplorationAndPredevelopmentCosts us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1.7452.0552.5464.3152.0971.54421113.0641.939
Percentage of ExplorationAndPredevelopmentCosts69.167.085.575.840.829.4227.382.533.123.2

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.7690.9980.4321.3713.0443.698-11.9172.3786.1176.371
Percentage of ExplorationAndPredevelopmentCosts30.532.614.524.159.270.3-127.317.566.176.2

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.0110.0120.00.0030.0030.0160.0020.0010.0720.055
Percentage of ExplorationAndPredevelopmentCosts0.40.40.00.10.10.30.00.00.80.7

hl:FinanceLeaseLiabilityAndRightofUseAssetsAdditions

hl:FinanceLeaseLiabilityAndRightofUseAssetsAdditions


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value3100000.0003498000.0
Percentage of FinanceLeaseLiabilityAndRightofUseAssetsAdditions100.00.00.0100.0

hl:FoundationGrantExpense

hl:FoundationGrantExpense


None
Period End2020-06-302019-06-30
Value1970000.00
Percentage of FoundationGrantExpense100.00.0

hl:IncreaseDecreaseInAccruedReclamationAndClosureCostsAndOtherNonCurrentLiabilities

hl:IncreaseDecreaseInAccruedReclamationAndClosureCostsAndOtherNonCurrentLiabilities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-2.7683.203-1.711-1.473-3.284-1.0641.9610.8280.5223.888-0.6734.517-2.4523.8110.4722.332-2.9932.058-0.4161.465-10.1420.743
Percentage of IncreaseDecreaseInAccruedReclamationAndClosureCostsAndOtherNonCurrentLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

hl:NoncashActivityRecognitionOfOperatingLeaseLiabilitesAndRightofuseAssets

hl:NoncashActivityRecognitionOfOperatingLeaseLiabilitesAndRightofuseAssets


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.00.00.00.00.0220.00.0
Percentage of NoncashActivityRecognitionOfOperatingLeaseLiabilitesAndRightofuseAssets0.00.00.00.00.0100.00.00.0

hl:Predevelopment

hl:Predevelopment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value0.5630.5350.6150.8810.7980.8561.2721.1951.4151.0051.3871.7571.0521.2521.6620.550.5210.4040.3791.6961.6180.5210.7220.3910.4370.4191.4013.4444.5124.7915.675.4093.4713.3662.6941.752
Percentage of Predevelopment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

hl:QuarterlyDividendPerShare us-gaap:Dividends

hl:QuarterlyDividendPerShare

hl:QuarterlyAverageRealizedPriceLevel1


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value00.010000.010000.010000.010
Percentage of QuarterlyDividendPerShare0.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.0

hl:QuarterlyAverageRealizedPriceLevel2


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value00.020000.020000.020000.020
Percentage of QuarterlyDividendPerShare0.0200.00.00.00.0200.00.00.00.0200.00.00.00.0200.00.0

hl:QuarterlyAverageRealizedPriceLevel3


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value00.030000.030000.030000.030
Percentage of QuarterlyDividendPerShare0.0300.00.00.00.0300.00.00.00.0300.00.00.00.0300.00.0

hl:QuarterlyAverageRealizedPriceLevel4


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value00.040000.040000.040000.040
Percentage of QuarterlyDividendPerShare0.0400.00.00.00.0400.00.00.00.0400.00.00.00.0400.00.0

hl:QuarterlyAverageRealizedPriceLevel5


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value00.050000.050000.050000.050
Percentage of QuarterlyDividendPerShare0.0500.00.00.00.0500.00.00.00.0500.00.00.00.0500.00.0

hl:RestrictedStockUnitDistributions

hl:RestrictedStockUnitDistributions


None
Period End2020-06-302019-12-312019-09-302018-12-312018-09-302018-06-30
Value-1479000.00-595000.0083000.0-1469000.0
Percentage of RestrictedStockUnitDistributions100.00.0100.00.0100.0100.0

hl:RestrictedStockUnitDistributions us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-302019-12-312019-09-302018-12-312018-09-302018-06-30
Value-426000.00-291000.000-270000.0
Percentage of RestrictedStockUnitDistributions28.80.048.90.00.018.4

us-gaap:CommonStock


None
Period End2020-06-302019-12-312019-09-302018-12-312018-09-302018-06-30
Value426000.00291000.000270000.0
Percentage of RestrictedStockUnitDistributions-28.80.0-48.90.00.0-18.4

us-gaap:TreasuryStock


None
Period End2020-06-302019-12-312019-09-302018-12-312018-09-302018-06-30
Value-1479000.00-595000.0083000.0-1469000.0
Percentage of RestrictedStockUnitDistributions100.00.0100.00.0100.0100.0

hl:RestrictedStockUnitDistributionsShares

hl:RestrictedStockUnitDistributionsShares


None
Period End2020-06-30
Value1702000.0
Percentage of RestrictedStockUnitDistributionsShares100.0

hl:RevenueExpenseFromContractWithCustomerIncludingAssessedTax

hl:RevenueExpenseFromContractWithCustomerIncludingAssessedTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value166136224161134152136143147139160140134142
Percentage of RevenueExpenseFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

hl:RevenueExpenseFromContractWithCustomerIncludingAssessedTax us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value166125208144761029260757090617082
Percentage of RevenueExpenseFromContractWithCustomerIncludingAssessedTax100.091.592.989.856.867.168.141.951.150.356.643.952.458.2

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4.9339.93171556524378696871796363
Percentage of RevenueExpenseFromContractWithCustomerIncludingAssessedTax3.07.37.69.642.234.532.154.647.149.344.756.547.044.7

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-4.9981.679-1.1461.0491.292-2.477-0.2485.022.6970.615-2.071-0.6260.807-4.093
Percentage of RevenueExpenseFromContractWithCustomerIncludingAssessedTax-3.01.2-0.50.61.0-1.6-0.23.51.80.4-1.3-0.40.6-2.9

hl:SalesRevenueGoodsExcludingGainLossOnForwardContracts

hl:SalesRevenueGoodsExcludingGainLossOnForwardContracts


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value171135226160132155136138144139162141133146
Percentage of SalesRevenueGoodsExcludingGainLossOnForwardContracts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

hl:SalesRevenueGoodsExcludingGainLossOnForwardContracts us-gaap:ProductOrService

hl:BulkConcentrate


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value5.9063.5766.2885.1843.8036.13.8773.8664.3095.6164.8475.8755.5084.521
Percentage of SalesRevenueGoodsExcludingGainLossOnForwardContracts3.42.62.83.22.93.92.82.83.04.03.04.24.13.1

hl:Carbon


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value161910174.2840.4520.9662.994
Percentage of SalesRevenueGoodsExcludingGainLossOnForwardContracts9.914.34.511.13.20.30.72.2

hl:DorAndMetalsFromDor


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value59671098777757983757375826768
Percentage of SalesRevenueGoodsExcludingGainLossOnForwardContracts34.749.848.454.558.448.958.159.952.252.846.858.550.647.0

hl:LeadConcentrate


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value7234773735493536423454314448
Percentage of SalesRevenueGoodsExcludingGainLossOnForwardContracts42.325.334.423.526.931.826.126.529.224.733.722.333.033.4

hl:ZincConcentrate


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1610221215231714222526211624
Percentage of SalesRevenueGoodsExcludingGainLossOnForwardContracts9.78.09.97.711.815.313.010.815.618.416.615.012.216.5

hl:SalesRevenueGoodsExcludingGainLossOnForwardContracts us-gaap:StatementGeographical

country:CA


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value805412088789255839488957983100
Percentage of SalesRevenueGoodsExcludingGainLossOnForwardContracts46.940.253.255.258.859.940.660.465.463.758.856.462.368.3

country:CN


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-30
Value25130.00.00.00.00.00.00.198371615
Percentage of SalesRevenueGoodsExcludingGainLossOnForwardContracts14.610.30.00.00.00.00.00.00.123.211.811.5

country:JP


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value116.12113179.2368.35213.3013.8971319141112
Percentage of SalesRevenueGoodsExcludingGainLossOnForwardContracts6.84.56.210.87.05.416.02.42.79.912.310.28.88.4

country:KR


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value252645332649353541324.844271828
Percentage of SalesRevenueGoodsExcludingGainLossOnForwardContracts14.719.720.121.019.731.825.825.828.723.53.019.414.219.8

country:NL


None
Period End2020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value-0.002210.445160.00.00.0
Percentage of SalesRevenueGoodsExcludingGainLossOnForwardContracts-0.09.70.312.10.00.00.0

country:US


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value293524203.2284.57124154.4074.0814.3693.1214.085.205
Percentage of SalesRevenueGoodsExcludingGainLossOnForwardContracts17.026.010.812.72.42.917.711.43.02.92.72.23.13.5

hl:OtherGeographicAreas


None
Period End2020-06-302020-03-312019-06-302019-03-312018-03-312017-03-31
Value0.116-0.9220.00.0-0.131-0.048
Percentage of SalesRevenueGoodsExcludingGainLossOnForwardContracts0.1-0.70.00.0-0.1-0.0

hl:SmelterAndRefiningCharges

hl:SmelterAndRefiningCharges


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1815115.3519.916.3483.6475.537.1057.8937.4136.6927.37414
Percentage of SmelterAndRefiningCharges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

hl:StockIssuedDuringPeriodShares401kMatch

hl:StockIssuedDuringPeriodShares401kMatch


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value606000.0352000.0362000.0384000.0
Percentage of StockIssuedDuringPeriodShares401kMatch100.0100.0100.0100.0

hl:StockIssuedDuringPeriodValue401kMatch

hl:StockIssuedDuringPeriodValue401kMatch


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1029000.01203000.01110000.0972000.0806000.0974000.0847000.0785000.01180000.0894000.0
Percentage of StockIssuedDuringPeriodValue401kMatch100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

hl:StockIssuedDuringPeriodValue401kMatch us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value878000.01114000.0967000.0831000.0716000.0878000.0775000.0728000.01097000.0839000.0
Percentage of StockIssuedDuringPeriodValue401kMatch85.392.687.185.588.890.191.592.793.093.8

us-gaap:CommonStock


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value151000.089000.0143000.0141000.090000.096000.072000.057000.083000.055000.0
Percentage of StockIssuedDuringPeriodValue401kMatch14.77.412.914.511.29.98.57.37.06.2

us-gaap:BusinessCombinationAcquisitionRelatedCosts

us-gaap:BusinessCombinationAcquisitionRelatedCosts


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302013-12-312013-09-302013-06-30
Value0.0060.0050.0520.1830.3970.0130.3896.1391.012.5070.00.0-0.0020.0270.5281.7650.4020.00.0152.1470.0290.76820
Percentage of BusinessCombinationAcquisitionRelatedCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationAcquisitionRelatedCosts us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-0.0-0.00.0020.0830.0810.0550.0310.2450.068
Percentage of BusinessCombinationAcquisitionRelatedCosts-0.0-0.03.845.420.4423.18.04.06.7

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-0.0-0.00.0-0.00.153-0.0-0.0460.1530.002-0.147
Percentage of BusinessCombinationAcquisitionRelatedCosts-0.0-0.00.0-0.038.5-0.0-11.82.50.2-5.9

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.0060.0050.050.10.163-0.0420.4045.7410.94-2.36
Percentage of BusinessCombinationAcquisitionRelatedCosts100.0100.096.254.641.1-323.1103.993.593.1-94.1

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:CommonStockDividendsPerShareDeclared


None
Period End2020-05-062020-06-302020-02-212020-03-312019-08-052019-09-302019-06-302019-03-312018-09-302018-06-302017-09-302017-06-302016-09-302016-06-302015-09-302015-06-302014-09-302014-06-302014-03-312013-11-042013-12-312013-08-062013-09-302013-06-302013-02-252012-09-302012-05-082012-05-072012-06-302012-03-312012-02-292012-02-282012-02-172011-12-312011-09-302011-02-28
Value0.00250.00250.00250.00250.00250.00250.00250.00250.00250.00250.00250.00250.00250.00250.00250.00250.00250.00250.00250.00250.00250.00250.00250.00250.010.00250.020.020.020.01250.01250.00250.010.0200.0125
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:CommonStockDividendsPerShareDeclared us-gaap:Range

srt:Minimum


None
Period End2020-03-312019-03-312018-09-302018-06-302018-03-312012-02-282011-09-30
Value0.010.01000.010.010.01
Percentage of CommonStockDividendsPerShareDeclared400.0400.00.00.00.0400.00.0

us-gaap:ConcentrationRiskPercentage1 us-gaap:ConcentrationRiskByBenchmark, us-gaap:StatementBusinessSegments

us-gaap:ConcentrationRiskPercentage1

us-gaap:SalesRevenueNet, hl:CasaBerardi


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value0.30.340.330.340.260.370.380.40.380.330.29
Percentage of ConcentrationRiskPercentage1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SalesRevenueNet, hl:GreensCreek


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value0.510.390.370.410.530.450.510.460.430.530.41
Percentage of ConcentrationRiskPercentage1170.0114.7112.1120.6203.8121.6134.2115.0113.2160.6141.4

us-gaap:SalesRevenueNet, hl:LuckyFriday


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-03-31
Value0.070.020.020.040.0100.020.040.14
Percentage of ConcentrationRiskPercentage123.35.96.111.83.80.05.310.048.3

us-gaap:SalesRevenueNet, hl:NevadaOperations


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value0.090.180.180.130.120.080
Percentage of ConcentrationRiskPercentage130.052.954.538.246.221.60.0

us-gaap:SalesRevenueNet, hl:SanSebastian


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value0.030.070.10.080.080.10.090.10.190.140.16
Percentage of ConcentrationRiskPercentage110.020.630.323.530.827.023.725.050.042.455.2

us-gaap:ConcentrationRiskPercentage1 us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

hl:Asahi, us-gaap:RevenueFromContractWithCustomer, us-gaap:CustomerConcentrationRisk


None
Period End2020-03-312019-03-31
Value0.170.02
Percentage of ConcentrationRiskPercentage150.07.7

hl:CIBC, us-gaap:RevenueFromContractWithCustomer, us-gaap:CustomerConcentrationRisk


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value0.310.30.360.240.160.260.28
Percentage of ConcentrationRiskPercentage1103.388.2109.170.661.570.373.7

hl:IXM, us-gaap:RevenueFromContractWithCustomer, us-gaap:CustomerConcentrationRisk


None
Period End2020-03-312019-03-31
Value0.10
Percentage of ConcentrationRiskPercentage129.40.0

hl:KoreaZinc, us-gaap:RevenueFromContractWithCustomer, us-gaap:CustomerConcentrationRisk


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value0.150.190.090.20.20.150.28
Percentage of ConcentrationRiskPercentage150.055.927.358.876.940.573.7

hl:OceanPartners, us-gaap:RevenueFromContractWithCustomer, us-gaap:CustomerConcentrationRisk


None
Period End2020-06-302019-06-302018-06-30
Value0.130.120
Percentage of ConcentrationRiskPercentage143.335.30.0

hl:SIPI, us-gaap:RevenueFromContractWithCustomer, us-gaap:CustomerConcentrationRisk


None
Period End2020-06-302019-06-30
Value0.10.03
Percentage of ConcentrationRiskPercentage133.38.8

hl:Scotia, us-gaap:RevenueFromContractWithCustomer, us-gaap:CustomerConcentrationRisk


None
Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value0.150.180.280.290.190.18
Percentage of ConcentrationRiskPercentage144.154.582.4111.551.447.4

hl:TeckMetalsLtd, us-gaap:RevenueFromContractWithCustomer, us-gaap:CustomerConcentrationRisk


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value0.20.020.030.030.150.110.17
Percentage of ConcentrationRiskPercentage166.75.99.18.857.729.744.7

hl:Trafigura, us-gaap:RevenueFromContractWithCustomer, us-gaap:CustomerConcentrationRisk


None
Period End2020-03-312019-09-302019-03-312018-09-30
Value000.120.1
Percentage of ConcentrationRiskPercentage10.00.046.227.0

us-gaap:CurrentFederalTaxExpenseBenefit

us-gaap:CurrentFederalTaxExpenseBenefit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312010-09-302010-06-30
Value0.2530.7320.3840.3150.002-0.00.453-0.00.001-9.3740.001-0.001-12.7976.584.1232.506-2.506-0.981-4.7761.7680.097-12.29-0.778-1.1926.499-1.467-5.4881.7612.231-1.2195.102-0.1443.672-4.1423.8544.1114.3124.3921.53
Percentage of CurrentFederalTaxExpenseBenefit100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CurrentForeignTaxExpenseBenefit

us-gaap:CurrentForeignTaxExpenseBenefit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1.652.0692.0292.4671.7161.0770.1320.082.9651.2065.035-3.959155.5155.2975.7731.6271.0154.770.451-0.5530.7080.2330.0030.2270.156-0.1690.1140.1150.1150.1150.1140.1150.1150.1150.1150.1150.1150.1150.1150.115
Percentage of CurrentForeignTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CurrentIncomeTaxExpenseBenefit

us-gaap:CurrentIncomeTaxExpenseBenefit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1.9032.8012.4132.7821.7181.0770.5850.082.9661.206-4.339-3.95915-7.282119.8964.133-1.4913.789-4.3251.2150.805-12.057-0.775-0.9656.655-1.656-5.5271.1433.252-2.4075.641-0.0274.338-4.6394.8554.7040.1159.186.2791.875
Percentage of CurrentIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1 us-gaap:Range, us-gaap:CreditFacility, us-gaap:VariableRate

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1

srt:Maximum, hl:NewFacility, us-gaap:BaseRate


None
Period End2020-03-31
Value0.03
Percentage of DebtInstrumentBasisSpreadOnVariableRate1100.0

srt:Maximum, hl:NewFacility, us-gaap:LondonInterbankOfferedRateLIBOR


None
Period End2020-03-31
Value0.04
Percentage of DebtInstrumentBasisSpreadOnVariableRate1133.3

srt:Minimum, hl:NewFacility, us-gaap:BaseRate


None
Period End2020-03-31
Value0.0125
Percentage of DebtInstrumentBasisSpreadOnVariableRate141.7

srt:Minimum, hl:NewFacility, us-gaap:LondonInterbankOfferedRateLIBOR


None
Period End2020-03-31
Value0.0225
Percentage of DebtInstrumentBasisSpreadOnVariableRate175.0

us-gaap:DeferredFederalIncomeTaxExpenseBenefit

us-gaap:DeferredFederalIncomeTaxExpenseBenefit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-1.866-1.25-4.658-2.652-5.456-2.477-3.369-3.778-0.0441.982.965-18.903-11.122-5.7238.7770.588701.8121.1672.4226.5452.043-3.886-3.13-4.4133.39-3.3874.1633.264-5.6270.722.97716221423-150.4771.8016.38
Percentage of DeferredFederalIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredForeignIncomeTaxExpenseBenefit

us-gaap:DeferredForeignIncomeTaxExpenseBenefit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value0.589-2.613-1.847-1.744-7.441-5.816-2.4331.019-2.539-0.438-2.129-3.422-2.805-2.8864.075.28-1.4142.557-13.342-2.987-2.514-1.7881.334-1.088-0.1740.258-1.804-0.405-4.551
Percentage of DeferredForeignIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value-1163000.0-1163000.0-1098000.0-1097000.0-1097000.0-1097000.0-933000.0-931000.0-931000.0-931000.0-1033000.0-1033000.0-1033000.0-1033000.0-1093000.0-1093000.0-1093000.0-1093000.0-1065000.0-1065000.0-1065000.0-1065000.0-1007000.0-756000.0-756000.0-756000.0-5364000.0660000.0776000.0-776000.0-4945000.0706000.0706000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value29000.029000.016000.015000.015000.015000.016000.015000.015000.015000.0-85000.0-84000.0-84000.0-84000.0-85000.0-84000.0-84000.0-84000.0-84000.0-84000.0-84000.0-84000.0-85000.0-84000.0-84000.0-84000.042000.0-171000.098000.097000.0100000.0101000.0100000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets us-gaap:SubsequentEventType

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets

us-gaap:SubsequentEvent


None
Period End2020-02-102019-02-20
Value0.06450.0637
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets100.0100.0

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value1872000.01872000.01494000.01496000.01496000.01496000.01634000.01634000.01634000.01634000.01463000.01462000.01462000.01462000.01324000.01325000.01325000.01325000.01346000.01345000.01345000.01345000.01249000.01249000.01249000.01249000.07525000.0-375000.0-1205000.01204000.08016000.0-1145000.0-1145000.0
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:DefinedBenefitPlanInterestCost


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value1404000.01404000.01622000.01620000.01620000.01620000.01377000.01377000.01377000.01377000.01339000.01339000.01339000.01339000.01308000.01307000.01307000.01307000.01205000.01206000.01206000.01206000.01301000.01186000.01186000.01186000.01528000.0422000.0969000.0970000.01018000.01017000.01017000.0
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value2058000.02058000.02343000.02336000.02336000.02336000.01945000.01941000.01941000.01941000.02022000.02022000.02022000.02022000.02070000.02068000.02068000.02068000.01894000.01896000.01896000.01896000.02226000.01629000.01629000.01629000.01894000.01105000.01696000.01696000.01672000.01672000.01672000.0
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:DefinedBenefitPlanServiceCost


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value1334000.01334000.01101000.01100000.01100000.01100000.01253000.01252000.01252000.01252000.01198000.01196000.01196000.01196000.01078000.01077000.01077000.01077000.01054000.01054000.01054000.01054000.01252000.01020000.01020000.01020000.01341000.0569000.01058000.01057000.0994000.0993000.0994000.0
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeGainLossOnDerivativeNet

us-gaap:DerivativeGainLossOnDerivativeNet


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value-21.625100.211-11.9259.787-3.6860.158-15.028219.094-4.023-11.3321.957-7.3435.8315.082-5.249-0.17-2.069-1.749-10.7822.9713-0.227-15.0788.847-14.251-5.9391.90819-4.879-15.372
Percentage of DerivativeGainLossOnDerivativeNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeGainLossOnDerivativeNet us-gaap:DerivativeInstrumentRisk

hl:ForecastedFutureConcentrateContracts


None
Period End2020-06-302020-03-312019-12-312019-03-31
Value-1.87.9-4.0-1.8
Percentage of DerivativeGainLossOnDerivativeNet8.375.7-1895.748.8

hl:UnsettledConcentrateSalesContracts


None
Period End2020-06-302020-03-312019-12-312019-03-31
Value-5.01.7-3.9-2.5
Percentage of DerivativeGainLossOnDerivativeNet23.116.3-1848.367.8

us-gaap:DerivativeLossOnDerivative

us-gaap:DerivativeLossOnDerivative


None
Period End2020-06-302017-12-312017-09-302012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312009-09-30
Value5.02.10.6-6.8139.053-6.1715.2310.919-40.382-0.5592.0340.038
Percentage of DerivativeLossOnDerivative100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeNonmonetaryNotionalAmountMass us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeNonmonetaryNotionalAmountMass

hl:Gold2020SettlementsForForecastedSales


None
Period End2020-06-302020-03-31
Value-0.0220.095
Percentage of DerivativeNonmonetaryNotionalAmountMass100.0100.0

hl:Lead2020SettlementsForForecastedSales


None
Period End2020-06-302020-03-312019-06-302019-03-312018-06-302018-03-312017-12-31
Value-4.745.8420.5510.5510.0190.661
Percentage of DerivativeNonmonetaryNotionalAmountMass21545.56149.50.00.00.00.00.0

hl:Lead2020SettlementsForProvisionalSales


None
Period End2020-03-31
Value7.441
Percentage of DerivativeNonmonetaryNotionalAmountMass7832.6

hl:Silver2020SettlementsForForecastedSales


None
Period End2020-06-302020-03-31
Value-0.1222.84
Percentage of DerivativeNonmonetaryNotionalAmountMass554.52989.5

hl:Silver2020SettlementsForProvisionalSales


None
Period End2020-03-31
Value0.045
Percentage of DerivativeNonmonetaryNotionalAmountMass47.4

hl:Zinc2020SettlementsForProvisionalSales


None
Period End2020-03-31
Value21
Percentage of DerivativeNonmonetaryNotionalAmountMass22452.6

us-gaap:DividendsCommonStock

us-gaap:DividendsCommonStock


None
Period End2020-05-062020-06-302020-02-212020-03-312019-12-312019-08-052019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312013-03-312013-02-252012-06-302012-03-312011-02-28
Value1300000.01318000.01300000.01304000.01259000.01200000.01225000.01221000.01209000.01197000.01196000.01002000.0998000.03600000.03600000.06400000.03600000.03600000.0
Percentage of DividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStock us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1318000.01304000.01259000.01225000.01221000.01209000.01197000.01196000.01002000.0998000.0
Percentage of DividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsPreferredStock

us-gaap:DividendsPreferredStock


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1380.1383.4083.4083.4093.408
Percentage of DividendsPreferredStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:EarningsPerShareBasicAndDiluted


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-03-31
Value-0.03-0.03-0.040.10.050.050.030.0200.07
Percentage of EarningsPerShareBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents

us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value-58000.0-1736000.0618000.0-175000.0337000.095000.0-1300000.0317000.0-1408000.0876000.044000.0-35000.0-728000.01814000.0-701000.0-661000.0-247000.01535000.0-1108000.0-1785000.0301000.0-2560000.0-1659000.0-2374000.01948000.0-1698000.0-6725000.0
Percentage of EffectOfExchangeRateOnCashAndCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value91000.0-949000.0618000.0257000.0-95000.095000.0-1300000.0-215000.0
Percentage of EffectOfExchangeRateOnCashAndCashEquivalents-156.954.7100.0-146.9-28.2100.0100.0-67.8

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-302018-03-31
Value-149000.0-787000.00-432000.0337000.095000.0-1408000.0876000.0
Percentage of EffectOfExchangeRateOnCashAndCashEquivalents256.945.30.0246.9100.0100.0100.0100.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-58000.0-1736000.0618000.0-175000.0337000.095000.0-1300000.0317000.0-1408000.0876000.044000.0-35000.0-728000.01814000.0
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EnvironmentalExpenseAndLiabilities

us-gaap:EnvironmentalExpenseAndLiabilities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-08-302014-09-302014-06-302014-03-312013-12-312013-10-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.5451.5481.6162.0891.6151.5942.1331.3171.3171.3231.1291.1321.2211.0261.1281.681.0060.9991.0080.7729.4780.7786.569550.9361.7770.9330.087150.5110.5990.591-2.8311.0291.4811.4276.1720.2760.2770.2791930.2820.2822.22
Percentage of EnvironmentalExpenseAndLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EnvironmentalRemediationExpense

us-gaap:EnvironmentalRemediationExpense


None
Period End2020-06-302020-03-312019-12-312019-10-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.0370.5161.1616.11.9071.0520.571.5851.8521.421.2621.6572.940.9851.1190.9422.1621.5761.0411.2371.1819.3350.4676.4891.2381.2671.1040.8310.9331.8451.7941.332-1.0932.2352.1781.8645.5211.3411.0211950.9621.3893.376
Percentage of EnvironmentalRemediationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-06-302017-03-31
Value6400000.0-1000000.01200000.0200000.0900000.0100000.0-300000.0-2200000.0-600000.0300000.0400000.0-300000.0
Percentage of EquitySecuritiesFvNiUnrealizedGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseInterestExpense

us-gaap:FinanceLeaseInterestExpense


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value200000.0100000.0200000.0200000.0
Percentage of FinanceLeaseInterestExpense100.0100.0100.0100.0

us-gaap:FinanceLeaseRightOfUseAssetAmortization

us-gaap:FinanceLeaseRightOfUseAssetAmortization


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value1800000.01500000.01800000.01600000.0
Percentage of FinanceLeaseRightOfUseAssetAmortization100.0100.0100.0100.0

us-gaap:ForeignCurrencyTransactionGainLossBeforeTax

us-gaap:ForeignCurrencyTransactionGainLossBeforeTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value-4.3418.066-1.7625.954-6.667-5.555.072-3.3161.9493.3990.343-5.97-4.695-0.5062.9062.166-1.732-7.9892.5157.894-1.818114.555.877-4.6334.6882.248
Percentage of ForeignCurrencyTransactionGainLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignCurrencyTransactionGainLossRealized

us-gaap:ForeignCurrencyTransactionGainLossRealized


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-3.2056.636-1.4950.773-4.381-3.1337.454-2.2122.4762.5920.609-4.764-3.883-2.2624.7872.375-1.885-8.2035.0339.077-1.833125.4847.299-5.3824.1344.043-1.473-0.144-0.144
Percentage of ForeignCurrencyTransactionGainLossRealized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnDispositionOfAssets

us-gaap:GainLossOnDispositionOfAssets


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302016-12-312016-09-302009-03-31
Value-677000.0104000.023000.0-24000.0-4642000.00-581000.03208000.036000.01118000.04830000.0-172000.08000.06200000.0
Percentage of GainLossOnDispositionOfAssets100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnSaleOfDerivatives

us-gaap:GainLossOnSaleOfDerivatives


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-06-302010-06-30
Value-14.0027.893-1.252-4.7183.798-1.799-0.01819164.007-4.702-11.2262.487-7.8090.007-0.0060.03.347-0.8875.79211-0.411-11.6019.452-5.537-4.5646.54121-2.344-9.0536.171-5.2310.5581.999
Percentage of GainLossOnSaleOfDerivatives100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnSaleOfDerivatives us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-14.0027.893-1.252-4.7183.798-1.799-0.01819164.007-4.702-11.2262.487-7.809
Percentage of GainLossOnSaleOfDerivatives100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:GainLossOnSaleOfPropertyPlantEquipment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-677000.0104000.023000.0-24000.0-4642000.00-581000.03208000.037000.0129000.01118000.04830000.062000.032000.0-172000.08000.0101000.0210000.0-229000.015000.0-116000.0-74000.0-24000.093000.0231000.0-275000.0-50000.000125000.0634000.0301000.0-688000.028000.0
Percentage of GainLossOnSaleOfPropertyPlantEquipment100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:IncomeLossFromEquityMethodInvestments

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-4.601111.178-6.761-48.37-22.433-16.124-54.6185.74517-177.866-7.369-2.3552.701
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4.601-11.33-1.1786.76148221654-5.745-17.7681777.3692.355-2.701
Percentage of IncomeLossFromEquityMethodInvestments-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-3.536-11.879-29.97117-2.589-9.4965.4873.607-5.25513-8.6753.178-9.427-1.51-8.5815.862-13.85610-8.1978.196-8.2474.037-15.25112-11.668-5.416-19.5012.7848.502-2.7120.3664.1725.969-5.5818-4.415-11.775-1.04327-5.082-10.296-1.159
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedSalaries

us-gaap:IncreaseDecreaseInAccruedSalaries


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-4.0779.4954.722.846-5.5527.2121.782-3.873.59-3.9273.0053.988-11.7826.8819.0845.4865.961-2.8265.1041.4185.919-5.1166.2171.1366.3482.7210.821.296-6.6235.0460.6360.9420.174-3.871.5091.0260.743-1.188
Percentage of IncreaseDecreaseInAccruedSalaries100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value1.9133.2526.7714.031148.2935.0621.662.5390.438-42.5882.1670.879218.2180.322-7.332-3.32-56.7591.0761.26-0.555-7.754-0.9813.9892.8514.589-0.3065.6-3.99-2.5695.72
Percentage of IncreaseDecreaseInDeferredIncomeTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-1.7182.642-0.7051.871-15.66-1.124-3.8433.062-0.6643.1718.916.581-2.533-1.363-14.9610.807-0.8870.619-7.9742.8752.2661.638-0.5172.714-0.694-0.923-4.0745.047-3.872-0.382-1.0272.173-1.207-0.549-2.537-2.1794.235-1.6832.253-1.4913.785-1.268
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPropertyAndOtherTaxesPayable

us-gaap:IncreaseDecreaseInPropertyAndOtherTaxesPayable


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2580000.01332000.02578000.0719000.0-7689000.01237000.0-200000.01517000.0-890000.0218000.02235000.0-8877000.02654000.01754000.03157000.01697000.0-4554000.0-37000.01871000.04720000.0-1675000.0-263000.0-2071000.0-4123000.0-2174000.04756000.05683000.0-2940000.0-5021000.0-2497000.02578000.06007000.0-9508000.02890000.0-11964000.0-88000.05031000.01333000.014169000.0-5623000.02198000.0-942000.0
Percentage of IncreaseDecreaseInPropertyAndOtherTaxesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryWriteDown

us-gaap:InventoryWriteDown


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value000001399000.0959000.07232000.0
Percentage of InventoryWriteDown0.00.00.00.00.0100.0100.0100.0

us-gaap:LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage us-gaap:Range, us-gaap:CreditFacility

us-gaap:LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage

srt:Maximum, hl:NewFacility


None
Period End2020-06-302020-03-312019-12-31
Value00.010
Percentage of LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage0.0100.00.0

srt:Minimum, hl:NewFacility


None
Period End2020-06-302020-03-312019-12-31
Value00.0056250.000625
Percentage of LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage0.056.20.0

us-gaap:NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent us-gaap:IncomeStatementLocation

us-gaap:NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent

us-gaap:OtherNonoperatingIncomeExpense


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value700000.0700000.01200000.01200000.01200000.0700000.0700000.0700000.0
Percentage of NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseExpense

us-gaap:OperatingLeaseExpense


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value1800000.01900000.01900000.02100000.0
Percentage of OperatingLeaseExpense100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value10-19.3353.925-3.2883.544.259-10.2813.743-5.203-2.073-1.7786.762.0473.261-3.704-1.602
Percentage of OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value10-19.3350.648-3.2883.544.259-14.2873.746-5.162-2.104-2.4897.6362.8783.204-3.66-0.6151.2391.065-6.6513.676-14.3991119-8.458-24.85811-14.631-0.8852.52412
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.00.00.00.00.00.0-0.0030.0030.00.0380.7061.0220.847-0.089
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent0.0-0.00.0-0.00.00.00.00.1-0.0-1.8-28.413.429.4-2.8

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value10-19.3350.648-3.2883.544.259-14.2873.746-5.162-2.104-2.4897.6362.8783.204
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.00.00.00.00.00.00.003-0.0030.0-0.038-1.002-1.022-0.8470.089
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent0.0-0.00.0-0.00.00.0-0.0-0.1-0.01.840.3-13.4-29.42.8

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value10-19.3350.648-3.2883.544.259-14.2863.746-5.162-2.105
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherCostAndExpenseOperating

us-gaap:OtherCostAndExpenseOperating


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1439000.0915000.01362000.0437000.0657000.0587000.0-171000.0448000.0638000.0515000.0898000.0134000.0697000.0690000.0937000.0954000.0622000.0640000.01040000.0743000.0766000.0628000.0442000.0442000.0693000.0718000.070000.0342000.0205000.01024000.01138000.0736000.01605000.0944000.01959000.01612000.02270000.01817000.01309000.01460000.01601000.0964000.0
Percentage of OtherCostAndExpenseOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoncashIncomeExpense


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-0.0-0.0450.003-0.001-0.002-0.0050.002-0.0010.036-0.0520.0030.0-0.0020.1790.012-0.011-0.006
Percentage of OtherNoncashIncomeExpense0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingIncomeExpenseNet

us-gaap:OtherOperatingIncomeExpenseNet


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value-23.969-25.503-39.713-14.44-26.649-18.761-24.269-11.827-12.593-13.742-42.293-7.185-12.182-14.372-2.833-6.121-8.19-16.218-8.286-3.684-14.815-3.761-9.393-4.782-10.425
Percentage of OtherOperatingIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingIncomeExpenseNet us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-31.30110-42.177-9.93-6.091-5.73-26.790.881-1.616-6.794-28.5281.202-1.557-3.116
Percentage of OtherOperatingIncomeExpenseNet130.6-42.0106.268.822.930.5110.4-7.412.849.467.5-16.712.821.7

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2.325-0.741-0.1471.606-20.058-12.64232-5.9-5.5226.917-27.856-4.676-2.4-9.332
Percentage of OtherOperatingIncomeExpenseNet-9.72.90.4-11.175.367.4-131.949.943.8-50.365.965.119.764.9

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value12-34.6236.624-2.3591.9396.004-11.08713-1.741-8.37717811-29.11542
Percentage of OtherOperatingIncomeExpenseNet-51.4135.8-16.716.3-7.3-32.045.7-110.113.861.0-422.2-153.7239.0-298.5

us-gaap:OtherOperatingIncomeExpenseNet us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-7.305-0.843-4.013-3.757-2.439-6.393-18.405-19.824-3.714-5.488-163.832-14.75220-44.82
Percentage of OtherOperatingIncomeExpenseNet30.53.310.126.09.234.175.8167.629.539.9387.4205.3-171.5311.9

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForProceedsFromOtherInvestingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value0.591-0.154-0.097-1.5390.083-0.001-1.688-9.906-28.6470.53-1.487-8.8360.2627.4180.78710153.6850.0190.371-7.0572.4850.091.3382.448
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-0.002-0.154-0.097-0.025-0.0180.0012.888-4.5590.107-0.151-2.34-5.615-0.103-0.061
Percentage of PaymentsForProceedsFromOtherInvestingActivities-0.3100.0100.01.6-21.7-100.0-171.146.0-0.4-28.5157.463.5-39.3-0.8

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-30
Value0.593-0.00.0-1.5140.101-0.002-5.3660.714-0.8020.562
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.30.0-0.098.4121.7200.0317.9-7.253.9-6.4

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-4.60311131-0.643-48.369-23.116-188.88381-22.55416-131.942-8.6761.0217.479
Percentage of PaymentsForProceedsFromOtherInvestingActivities-778.8-7357.8-135114.441.8-58275.92311600.011189.6-3854.178.73067.98873.098.2389.7100.8

us-gaap:PaymentsForProceedsFromOtherInvestingActivities us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4.603-11.331-131.0610.6434823189-387.85-5.78-15.5791334.915
Percentage of PaymentsForProceedsFromOtherInvestingActivities778.87357.8135114.4-41.858275.9-2311600.0-11236.43915.320.2-2939.4-8972.6-55.6

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDebtIssuanceCosts


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value93000.0458000.0389000.0541000.07000.039000.0178000.02457000.00385000.0091000.020000.024000.024000.059000.04000.0060000.063000.0233000.0128000.0109000.0468000.00-182000.0
Percentage of PaymentsOfDebtIssuanceCosts100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:PaymentsOfDebtIssuanceCosts us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

hl:IQNotes, us-gaap:SeniorNotes, us-gaap:SubsequentEvent


None
Period End2020-07-09
Value600000.0
Percentage of PaymentsOfDebtIssuanceCosts0.0

us-gaap:PaymentsOfDebtIssuanceCosts us-gaap:DebtInstrument, us-gaap:SubsequentEventType

hl:TheIQNotes, us-gaap:SubsequentEvent


None
Period End2020-07-09
Value600000.0
Percentage of PaymentsOfDebtIssuanceCosts0.0

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.0138000.03408000.03408000.0139000.0138000.0828000.0
Percentage of PaymentsOfDividendsPreferredStockAndPreferenceStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:ProceedsFromIssuanceOfDebt

hl:IQNotes, us-gaap:SeniorNotes, us-gaap:SubsequentEvent


None
Period End2020-07-09
Value12
Percentage of ProceedsFromIssuanceOfDebt100.0

us-gaap:ProceedsFromIssuanceOfDebt us-gaap:DebtInstrument, us-gaap:SubsequentEventType

hl:TheIQNotes, us-gaap:SubsequentEvent


None
Period End2020-07-09
Value12
Percentage of ProceedsFromIssuanceOfDebt100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value-2.838-0.45848-1.135-1.652-0.0383.4810.628-1.472-1.2250.125-0.9047.867-0.822-0.097-1.0033.9170.737-0.2333712-0.4680.1822.139-3.851
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-23.807-10.2330.471-59.57836-15.72584-9.751-20.54-20.118168-31.0016.4763.025
Percentage of ProceedsFromPaymentsForOtherFinancingActivities838.92234.31.05249.2-2217.441381.62422.9-1552.71395.41642.3134959.23429.382.3-368.0

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value14-23.129-59.97753-16.19918-102.1345320-1.285-91.7222127.431
Percentage of ProceedsFromPaymentsForOtherFinancingActivities-520.05050.0-123.3-4736.8980.6-48171.1-2934.08524.4-1373.3104.9-73376.0-2486.6165.2-904.0

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3.6179.582219-6.5942714-203.658467-2.358-1.18642-33.59329-41.096
Percentage of ProceedsFromPaymentsForOtherFinancingActivities-127.4-2092.1451.3581.0-1641.4-37492.1-5850.674462.4160.296.834140.03716.0380.44999.5

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2.59423-111.35111-49.2-16.865224-510.7781.21121-119.52941-41.53529
Percentage of ProceedsFromPaymentsForOtherFinancingActivities-91.4-5092.1-228.9-993.32978.244381.66461.7-81334.1-82.3-1744.0-95623.2-4558.7-528.0-3627.5

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value46000.0154000.097000.061000.024000.01000.01689000.0259000.0312000.0151000.0223000.09000.081000.061000.0031000.0102000.0215000.0302000.0124000.0128000.025000.0-19000.0209000.0334000.000126000.0142000.0628000.081000.035000.0001000.0112000.0
Percentage of ProceedsFromSaleOfPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.00.00.0100.0100.0

us-gaap:RepaymentsOfDebt

us-gaap:RepaymentsOfDebt


None
Period End2020-03-312019-03-312017-03-312016-03-31
Value506580.470.664
Percentage of RepaymentsOfDebt100.0100.0100.0100.0

us-gaap:RepaymentsOfLongTermCapitalLeaseObligations

us-gaap:RepaymentsOfLongTermCapitalLeaseObligations


None
Period End2020-06-302020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1556000.01284000.02116000.01261000.01347000.02230000.02440000.01322000.01451000.01820000.01650000.01595000.02107000.01972000.02238000.02118000.0
Percentage of RepaymentsOfLongTermCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLongTermDebtAndCapitalSecurities

us-gaap:RepaymentsOfLongTermDebtAndCapitalSecurities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1615078679625925842.441.3221.4511.821.652.0654.8281.9722.2382.1182.1482.8932.5932.3472.2442.3682.1222.4031.8681.7461.8851.541.3292.0691.4281.0640.8960.7450.6780.6190.5530.4830.3690.375
Percentage of RepaymentsOfLongTermDebtAndCapitalSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLongTermDebtAndCapitalSecurities us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.5561.2842.1922.491.7290.7462.4561.7010.7490.6440.7241.4741.3861.658
Percentage of RepaymentsOfLongTermDebtAndCapitalSecurities1.00.32.53.12.81.39.72.030.748.749.981.084.080.3

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.0-0.0-0.3830.3870.515-36.145351.6910.6780.7270.3460.2640.407
Percentage of RepaymentsOfLongTermDebtAndCapitalSecurities0.0-0.0-0.50.60.9-142.642.269.351.350.119.016.019.7

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value160506847760585947
Percentage of RepaymentsOfLongTermDebtAndCapitalSecurities99.099.798.197.396.697.9232.955.8

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage us-gaap:AwardType, us-gaap:Vesting

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage

us-gaap:RestrictedStockUnitsRSU, hl:FirstAwardsVestingInJune2021AndJune2020


None
Period End2020-06-30
Value0.5
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage100.0

us-gaap:RestrictedStockUnitsRSU, hl:FirstAwardsVestingInJune2021June2022AndJune2023


None
Period End2020-06-30
Value0.3333
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage66.7

us-gaap:RestrictedStockUnitsRSU, hl:SecondAwardsVestingInJune2021AndJune2020


None
Period End2020-06-30
Value0.5
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage100.0

us-gaap:RestrictedStockUnitsRSU, hl:SecondAwardsVestingInJune2021June2022AndJune2023


None
Period End2020-06-30
Value0.3333
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage66.7

us-gaap:RestrictedStockUnitsRSU, hl:ThirdAwardsVestingInJune2021June2022AndJune2023


None
Period End2020-06-30
Value0.3333
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage66.7

us-gaap:StockIssuedDuringPeriodSharesEmployeeBenefitPlan

us-gaap:StockIssuedDuringPeriodSharesEmployeeBenefitPlan


None
Period End2020-06-302019-06-30
Value167000.02384000.0
Percentage of StockIssuedDuringPeriodSharesEmployeeBenefitPlan100.0100.0

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation


None
Period End2020-06-302019-06-30
Value2800000.03597000.0
Percentage of StockIssuedDuringPeriodSharesShareBasedCompensation100.0100.0

us-gaap:StockIssuedDuringPeriodSharesTreasuryStockReissued

us-gaap:StockIssuedDuringPeriodSharesTreasuryStockReissued


None
Period End2020-06-30
Value650000.0
Percentage of StockIssuedDuringPeriodSharesTreasuryStockReissued100.0

us-gaap:StockIssuedDuringPeriodSharesTreasuryStockReissued us-gaap:CounterpartyName

hl:HeclaCharitableFoundation


None
Period End2020-06-30
Value650000.0
Percentage of StockIssuedDuringPeriodSharesTreasuryStockReissued100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeBenefitPlan

us-gaap:StockIssuedDuringPeriodValueEmployeeBenefitPlan


None
Period End2020-06-302019-12-312019-09-302019-06-302018-12-312018-09-30
Value350000.0003600000.02095000.05500000.0
Percentage of StockIssuedDuringPeriodValueEmployeeBenefitPlan100.00.00.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeBenefitPlan us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-302019-12-312019-09-302019-06-302018-12-312018-09-30
Value308000.01000.003003000.01879000.05032000.0
Percentage of StockIssuedDuringPeriodValueEmployeeBenefitPlan88.00.00.083.489.791.5

us-gaap:CommonStock


None
Period End2020-06-302019-12-312019-09-302019-06-302018-12-312018-09-30
Value42000.0-1000.00597000.0216000.0468000.0
Percentage of StockIssuedDuringPeriodValueEmployeeBenefitPlan12.00.00.016.610.38.5

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardGross

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardGross


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1211000.01219000.0910000.01206000.01518000.01579000.01606000.01638000.01315000.01089000.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardGross us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1211000.01219000.0910000.01206000.01518000.01579000.01606000.01638000.01315000.01089000.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation


None
Period End2020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-31
Value3829000.08000.041000.06630000.00-83000.003638000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.00.0100.00.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-31
Value4396000.0007375000.00004554000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation114.80.00.0111.20.0-0.00.0125.2

us-gaap:CommonStock


None
Period End2020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-31
Value699000.000899000.0000309000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation18.30.00.013.60.0-0.00.08.5

us-gaap:TreasuryStock


None
Period End2020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-31
Value-1266000.08000.041000.0-1644000.00-83000.00-1225000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation-33.1100.0100.0-24.80.0100.00.0-33.7

us-gaap:TreasuryStockReissuedAtLowerThanRepurchasePrice

us-gaap:TreasuryStockReissuedAtLowerThanRepurchasePrice


None
Period End2020-06-30
Value-1970000.0
Percentage of TreasuryStockReissuedAtLowerThanRepurchasePrice100.0

us-gaap:TreasuryStockReissuedAtLowerThanRepurchasePrice us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


None
Period End2020-06-30
Value246000.0
Percentage of TreasuryStockReissuedAtLowerThanRepurchasePrice-12.5

us-gaap:TreasuryStock


None
Period End2020-06-30
Value-2216000.0
Percentage of TreasuryStockReissuedAtLowerThanRepurchasePrice112.5

us-gaap:UnderlyingDerivativeMass us-gaap:DerivativeInstrumentRisk

us-gaap:UnderlyingDerivativeMass

hl:Gold2020SettlementsForForecastedSales


None
Period End2020-06-302020-03-31
Value151.01482.0
Percentage of UnderlyingDerivativeMass100.0100.0

hl:Lead2020SettlementsForForecastedSales


None
Period End2020-06-302020-03-312019-03-312018-06-302018-03-312017-12-31
Value-0.210.980.9601.130.01
Percentage of UnderlyingDerivativeMass-0.10.10.00.00.00.0

hl:Lead2020SettlementsForProvisionalSales


None
Period End2020-03-31
Value0.78
Percentage of UnderlyingDerivativeMass0.1

hl:Silver2020SettlementsForForecastedSales


None
Period End2020-06-302020-03-31
Value-0.3316.0
Percentage of UnderlyingDerivativeMass-0.21.1

hl:Silver2020SettlementsForProvisionalSales


None
Period End2020-03-31
Value17.82
Percentage of UnderlyingDerivativeMass1.2

hl:Zinc2020SettlementsForProvisionalSales


None
Period End2020-03-31
Value0.91
Percentage of UnderlyingDerivativeMass0.1

us-gaap:UnrealizedGainLossOnInvestments

us-gaap:UnrealizedGainLossOnInvestments


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value6409000.0-978000.0-1230000.0-126000.0-1129000.096000.0-355000.0-2207000.0-564000.0310000.0-178000.0-124000.0-276000.0327000.0-665000.049000.01150000.0-711000.0-107000.0-100000.0-117000.0-2843000.0-474000.0-2830000.0-608000.0688000.0-2966000.0
Percentage of UnrealizedGainLossOnInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

hl:AmountOfNewDebtRaisedAfterWhichDollarForDollarReductionInLineOfCreditWillTakeEffect us-gaap:CreditFacility, us-gaap:SubsequentEventType

hl:AmountOfNewDebtRaisedAfterWhichDollarForDollarReductionInLineOfCreditWillTakeEffect

us-gaap:RevolvingCreditFacility, us-gaap:SubsequentEvent


None
Period End2020-02-06
Value600
Percentage of AmountOfNewDebtRaisedAfterWhichDollarForDollarReductionInLineOfCreditWillTakeEffect100.0

hl:CommonStockSharesIssuedLessTreasuryShares

hl:CommonStockSharesIssuedLessTreasuryShares


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value534529529487
Percentage of CommonStockSharesIssuedLessTreasuryShares100.0100.0100.0100.0

hl:DebtInstrumentNumberOfIssuanceInstallments us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

hl:DebtInstrumentNumberOfIssuanceInstallments

hl:IQNotes, us-gaap:SeniorNotes, us-gaap:SubsequentEvent


None
Period End2020-07-09
Value4.0
Percentage of DebtInstrumentNumberOfIssuanceInstallments100.0

hl:DebtInstrumentNumberOfIssuanceInstallments us-gaap:DebtInstrument, us-gaap:SubsequentEventType

hl:TheIQNotes, us-gaap:SubsequentEvent


None
Period End2020-07-09
Value4.0
Percentage of DebtInstrumentNumberOfIssuanceInstallments100.0

hl:LeverageRatio us-gaap:CreditFacility

hl:LeverageRatio

hl:NewFacility


None
Period End2020-06-302014-12-31
Value4.254.0
Percentage of LeverageRatio100.0100.0

hl:LeverageRatio us-gaap:CreditFacility, us-gaap:SubsequentEventType

us-gaap:RevolvingCreditFacility, us-gaap:SubsequentEvent


None
Period End2020-07-012019-10-012019-04-01
Value4.06.05.0
Percentage of LeverageRatio0.00.00.0

hl:LeverageRatio us-gaap:StatementScenario, us-gaap:CreditFacility

srt:ScenarioForecast, us-gaap:RevolvingCreditFacility


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-30
Value4.05.05.56.06.5
Percentage of LeverageRatio0.0117.60.00.00.0

hl:MetalsContainedInConcentrates us-gaap:ProductOrService

hl:MetalsContainedInConcentrates

hl:Gold1


None
Period End2020-06-30
Value7969.0
Percentage of MetalsContainedInConcentrates100.0

hl:Lead


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value7405.03721.04939.06344.03142.01814.01572.02447.02792.01800.0
Percentage of MetalsContainedInConcentrates92.90.00.00.00.00.00.00.00.00.0

hl:SilverContracts


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-30
Value2600000.02100000.02500000.02900000.01700000.0
Percentage of MetalsContainedInConcentrates32626.40.00.00.00.0

hl:Zinc


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value9983.011376.011627.010737.011021.011108.010689.07277.011696.011030.0
Percentage of MetalsContainedInConcentrates125.30.00.00.00.00.00.00.00.00.0

us-gaap:Gold


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value6602.010020.08831.06473.04096.03658.05734.05842.06151.0
Percentage of MetalsContainedInConcentrates0.00.00.00.00.00.00.00.00.0

hl:OpenPurchaseOrders us-gaap:StatementBusinessSegments

hl:OpenPurchaseOrders

hl:CasaBerardi


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value0.60.31.40.40.41.12.02.13.12.01.91.42.12.11.61.90.70.80.70.70.80.70.50.50.86.313
Percentage of OpenPurchaseOrders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

hl:GreensCreek


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value3.33.64.34.43.91.6147.43.310119.510.08.37.20.61.07.26.90.51.43.92.41.31.55.46.42.44.19.9e-06
Percentage of OpenPurchaseOrders550.01200.0307.11100.0975.0145.5710.0352.4106.5525.0785.7452.4476.2518.8378.985.7125.01028.6985.762.5200.0780.0480.0162.523.839.70.00.00.00.0

hl:LuckyFriday


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value2.31.61.81.61.50.40.40.70.10.20.30.10.20.71.41.11.00.72.42.22.42.21.71.41.41.20.20.30.91.0000000000000001e-07
Percentage of OpenPurchaseOrders383.3533.3128.6400.0375.036.420.033.33.210.015.87.19.533.387.557.9142.9100.0342.9275.0342.9440.0340.0175.022.28.80.00.00.00.0

hl:NevadaOperations


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.60.80.50.82.9105.3
Percentage of OpenPurchaseOrders100.0266.735.7200.0725.0990.9265.0

hl:OtherCurrentAssets

hl:OtherCurrentAssets


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value138126116145135132136137112153134138121
Percentage of OtherCurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

hl:OtherCurrentAssets us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value115958911362616942445547
Percentage of OtherCurrentAssets83.275.776.977.845.846.350.930.939.336.335.5

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1011172561646079494939
Percentage of OtherCurrentAssets7.79.314.817.445.448.944.558.144.232.429.5

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value12199.7257.031126.3596.38815184847
Percentage of OtherCurrentAssets9.215.18.34.88.94.84.711.116.531.335.4

hl:OtherCurrentAssets us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-0.074-0.073-0.074-0.072-0.074-0.074-0.069-0.068-0.07-0.069-0.575
Percentage of OtherCurrentAssets-0.1-0.1-0.1-0.0-0.1-0.1-0.1-0.0-0.1-0.0-0.4

hl:OtherNonCurrentAssets

hl:OtherNonCurrentAssets


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value33283438394119243323245947
Percentage of OtherNonCurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

hl:OtherNonCurrentAssets us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2424242522239.034.398.3577.377.289
Percentage of OtherNonCurrentAssets73.387.970.565.557.856.745.617.924.831.729.6

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-120.211-124.32-121.981-120.645-117.873-115.696-122.969118.2968.3259.283
Percentage of OtherNonCurrentAssets-357.3-437.8-353.7-311.4-299.0-278.7-621.447.624.735.837.7

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value277263289284286278276149231314
Percentage of OtherNonCurrentAssets824.3927.4839.2734.1726.6670.51397.9608.370.459.358.5

hl:OtherNonCurrentAssets us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-148.155-135.599-157.28-150.374-151.959-144.706-142.912-140.594-6.682-6.22-6.37
Percentage of OtherNonCurrentAssets-440.4-477.5-456.1-388.2-385.4-348.5-722.1-573.9-19.9-26.7-25.9

hl:OtherNonCurrentLiabilities

hl:OtherNonCurrentLiabilities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value66716358545657485351595456
Percentage of OtherNonCurrentLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

hl:OtherNonCurrentLiabilities us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value6.6736.5756.5775.3936.1165.8715.6595.7845.5845.3845.185
Percentage of OtherNonCurrentLiabilities10.09.210.49.211.210.49.811.910.510.58.7

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.9660.9391.1261.0170.9590.9160.8951.2841.1071.0910.838
Percentage of OtherNonCurrentLiabilities1.51.31.81.71.81.61.62.62.12.11.4

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value5863555247495141464453
Percentage of OtherNonCurrentLiabilities88.589.587.889.187.088.088.685.587.587.489.9

us-gaap:AccruedReclamationCostsCurrent

us-gaap:AccruedReclamationCostsCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value5.1095.2774.5817.4576.8245.3253.416.6218.3158.3156.6796.5148.5327.4535.6531724202020211.6311.6312.23658585874191919343940421781751751755.773
Percentage of AccruedReclamationCostsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesEquitySecurities us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:AvailableForSaleSecuritiesEquitySecurities

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value124.9196.2077.3495.8156.7686.5837.197.4497.6527.5617.0984.7295.1045.0026.3564.4531.515
Percentage of AvailableForSaleSecuritiesEquitySecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value76216633410122861240213187173165178171156
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-03-312016-12-312015-12-31
Value251816103.1324.2949.68423252232312643
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations33.28.325.831.329.933.534.137.910.510.317.117.915.528.0

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-03-312016-12-312015-12-31
Value9.3298.457134.4047.3135.1271210515351423218
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations12.13.921.012.969.940.043.916.721.625.327.423.718.711.7

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-03-312016-12-312015-12-31
Value4219033180.0143.4016.2662816313710310411394
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations54.787.853.255.80.126.522.145.467.964.455.558.465.960.3

us-gaap:CertificatesOfDepositAtCarryingValue us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:CertificatesOfDepositAtCarryingValue

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value1.0531.0531.0251.0251.0251.0251.0251.0051.0321.0761.0982.22.26.0844.8990.999
Percentage of CertificatesOfDepositAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:DebtInstrumentFaceAmount

hl:The2028SeniorNotes, us-gaap:SeniorNotes


None
Period End2020-02-19
Value475
Percentage of DebtInstrumentFaceAmount100.0

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

hl:IQNotes, us-gaap:SeniorNotes, us-gaap:SubsequentEvent


None
Period End2020-07-09
Value50
Percentage of DebtInstrumentFaceAmount0.0

us-gaap:DebtInstrumentFaceAmount us-gaap:DebtInstrument, us-gaap:SubsequentEventType

hl:TheIQNotes, us-gaap:SubsequentEvent


None
Period End2020-07-09
Value50
Percentage of DebtInstrumentFaceAmount0.0

us-gaap:DebtInstrumentUnamortizedDiscount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentUnamortizedDiscount

hl:The2028SeniorNotes, us-gaap:SeniorNotes


None
Period End2020-06-302020-02-19
Value6700000.05500000.0
Percentage of DebtInstrumentUnamortizedDiscount100.0100.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

hl:The2028SeniorNotes, us-gaap:SeniorNotes


None
Period End2020-03-31
Value6000000.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet100.0

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxAssetsNet


None
Period End2020-06-302020-03-312019-12-31
Value3181000.03007000.03537000.0
Percentage of DeferredIncomeTaxAssetsNet100.0100.0100.0

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsCurrentFiscalYear us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsCurrentFiscalYear

us-gaap:PensionPlansDefinedBenefit


None
Period End2020-06-30
Value10000000.0
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsCurrentFiscalYear100.0

us-gaap:SupplementalEmployeeRetirementPlanDefinedBenefit


None
Period End2020-06-30
Value600000.0
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsCurrentFiscalYear6.0

us-gaap:DepositsMoneyMarketDeposits us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:DepositsMoneyMarketDeposits

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value7521562329.434112760239212186172164176169167143155
Percentage of DepositsMoneyMarketDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssets us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeAssets

us-gaap:CommodityContract


None
Period End2020-06-302020-03-312019-09-30
Value0.20.80.7
Percentage of DerivativeAssets100.0100.0100.0

us-gaap:DerivativeAssets us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-06-302020-03-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-31
Value0.2218.8110.00.2070.2090.282140.630.3941.2080.2545.403
Percentage of DerivativeAssets110.51101.40.00.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeAssetsCurrent us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeAssetsCurrent

us-gaap:OtherCurrentAssets, us-gaap:CommodityContract


None
Period End2020-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value0.20.20.32.40.30.41.20.2
Percentage of DerivativeAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherCurrentAssets, us-gaap:ForeignExchangeContract


None
Period End2020-06-302019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value0.10.10.60.20.0231.10.11.12.81.10.2
Percentage of DerivativeAssetsCurrent50.00.00.0100.00.0366.74.2366.7700.091.7100.0

us-gaap:DerivativeAveragePriceRiskOptionStrikePrice us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType

us-gaap:DerivativeAveragePriceRiskOptionStrikePrice

hl:GoldContracts, us-gaap:SubsequentEvent


None
Period End2020-04-302019-10-312019-07-31
Value1600.01450.01400.0
Percentage of DerivativeAveragePriceRiskOptionStrikePrice100.0100.0100.0

hl:SilverContracts, us-gaap:SubsequentEvent


None
Period End2020-05-072019-10-312019-07-31
Value016.015.13
Percentage of DerivativeAveragePriceRiskOptionStrikePrice0.01.11.1

us-gaap:DerivativeForwardExchangeRate1 us-gaap:Range, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:StatementBusinessSegments

us-gaap:DerivativeForwardExchangeRate1

srt:Maximum, us-gaap:ForeignExchangeContract, us-gaap:DesignatedAsHedgingInstrument, hl:CasaBerardi


None
Period End2020-06-302020-03-312019-12-31
Value1.37851.37851.3332
Percentage of DerivativeForwardExchangeRate1100.0100.0100.0

srt:Minimum, us-gaap:ForeignExchangeContract, us-gaap:DesignatedAsHedgingInstrument, hl:SanSebastian


None
Period End2020-03-312019-12-31
Value20.81220.561
Percentage of DerivativeForwardExchangeRate11509.81542.2

us-gaap:DerivativeLiabilities us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeLiabilities

us-gaap:CommodityContract


None
Period End2020-06-302020-03-312019-12-312019-09-30
Value0.50.42.10.4
Percentage of DerivativeLiabilities100.0100.0100.0100.0

us-gaap:DerivativeLiabilities us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-06-302020-03-312019-12-312019-03-312018-12-312018-09-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value9.8870.0695.7774.0570.3730.6047.06615111.3832.3860.1921.0043.4010.283
Percentage of DerivativeLiabilities1977.417.2275.10.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeLiabilitiesCurrent

us-gaap:DerivativeLiabilitiesCurrent


None
Period End2020-06-302019-12-31
Value136.17
Percentage of DerivativeLiabilitiesCurrent100.0100.0

us-gaap:DerivativeLiabilitiesCurrent us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

us-gaap:OtherCurrentLiabilities, us-gaap:CommodityContract


None
Period End2020-06-302019-03-312018-06-302018-03-312017-12-312017-06-302017-03-31
Value9.94.01.26.8101.32.0
Percentage of DerivativeLiabilitiesCurrent71.80.00.00.00.00.00.0

us-gaap:OtherCurrentLiabilities, us-gaap:ForeignExchangeContract


None
Period End2020-06-302020-03-312019-12-312019-06-302019-03-312018-06-302018-03-312017-12-312017-06-302017-03-312016-12-312016-09-302016-06-30
Value3.97.50.40.62.01.40.20.40.41.62.80.70.1
Percentage of DerivativeLiabilitiesCurrent28.30.06.50.00.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeLiabilitiesCurrent us-gaap:DerivativeInstrumentRisk

us-gaap:CommodityContract


None
Period End2020-03-312019-12-312019-06-30
Value0.15.84.0
Percentage of DerivativeLiabilitiesCurrent0.094.00.0

us-gaap:DerivativeLiabilitiesNoncurrent

us-gaap:DerivativeLiabilitiesNoncurrent


None
Period End2020-06-302019-12-31
Value5282000.01044000.0
Percentage of DerivativeLiabilitiesNoncurrent100.0100.0

us-gaap:DerivativeLiabilitiesNoncurrent us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

us-gaap:OtherNoncurrentLiabilities, us-gaap:ForeignExchangeContract


None
Period End2020-06-302019-03-312018-06-302017-12-312017-06-302017-03-31
Value5300000.02700000.01000000.0300000.0100000.01200000.0
Percentage of DerivativeLiabilitiesNoncurrent100.30.00.00.00.00.0

us-gaap:DerivativeNotionalAmount us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:StatementBusinessSegments

us-gaap:DerivativeNotionalAmount

us-gaap:ForeignExchangeContract, us-gaap:DesignatedAsHedgingInstrument, hl:CasaBerardi


None
Period End2020-06-302020-03-312019-12-312019-09-30
Value315345279300
Percentage of DerivativeNotionalAmount100.0100.0100.0100.0

us-gaap:ForeignExchangeContract, us-gaap:DesignatedAsHedgingInstrument, hl:SanSebastian


None
Period End2020-06-302020-03-312019-12-312019-09-30
Value0.03.27.137
Percentage of DerivativeNotionalAmount0.00.92.512.4

us-gaap:DerivativeNotionalAmount us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType

hl:GoldContracts, us-gaap:SubsequentEvent


None
Period End2020-04-302019-10-31
Value1.73.2
Percentage of DerivativeNotionalAmount0.00.0

us-gaap:DerivativeNumberOfInstrumentsHeld us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:StatementBusinessSegments

us-gaap:DerivativeNumberOfInstrumentsHeld

us-gaap:ForeignExchangeContract, us-gaap:DesignatedAsHedgingInstrument, hl:CasaBerardi


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value155.0128.0135.0127.0130.0107.094.0107.0120.096.094.0106.0118.0130.0
Percentage of DerivativeNumberOfInstrumentsHeld100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignExchangeContract, us-gaap:DesignatedAsHedgingInstrument, hl:SanSebastian


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value2.05.010.014.019.024.030.033.036.025.06.012.018.024.0
Percentage of DerivativeNumberOfInstrumentsHeld1.33.97.411.014.622.431.930.830.026.06.411.315.318.5

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value24342623213630292321312925383628231927232318272222171818161510109.1829.0081211109.61014
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:RestrictedStockUnitsRSU


None
Period End2020-06-30
Value4000000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType, us-gaap:Vesting

us-gaap:RestrictedStockUnitsRSU, hl:AwardsVestingJune2021


None
Period End2020-06-30
Value1400000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized35.0

us-gaap:RestrictedStockUnitsRSU, hl:VestingIn2022


None
Period End2020-06-30
Value1300000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized32.5

us-gaap:RestrictedStockUnitsRSU, hl:VestingIn2023


None
Period End2020-06-30
Value1200000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized30.0

us-gaap:EquitySecuritiesFvNiCost

us-gaap:EquitySecuritiesFvNiCost


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value109.29.89.68.07.87.77.96.05.65.7
Percentage of EquitySecuritiesFvNiCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiability


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value12111214131513
Percentage of FinanceLeaseLiability100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value5745000.05391000.05429000.05704000.05392000.05858000.05264000.0
Percentage of FinanceLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityNoncurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value7057000.05810000.07214000.08569000.08013000.09302000.07871000.0
Percentage of FinanceLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-30
Value1311131514
Percentage of FinanceLeaseLiabilityPaymentsDue100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-30
Value900000.0700000.0800000.01000000.0900000.0
Percentage of FinanceLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseRightOfUseAsset


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value20192021202120
Percentage of FinanceLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignCurrencyContractAssetFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:ForeignCurrencyContractAssetFairValueDisclosure

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value295000.001184000.0143000.01014000.0153000.023000.01760000.0172000.03122000.04943000.06533000.02286000.0364000.027000.048000.0537000.0
Percentage of ForeignCurrencyContractAssetFairValueDisclosure100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignCurrencyContractsLiabilityFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:ForeignCurrencyContractsLiabilityFairValueDisclosure

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-06-302017-03-312016-12-312016-09-302016-06-30
Value9.174191.4374.241.7024.6498.5950.1362.330.2480.5852.7235.2881.6040.497
Percentage of ForeignCurrencyContractsLiabilityFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxesReceivable

us-gaap:IncomeTaxesReceivable


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312013-12-312012-12-31
Value1112202225161410162.029
Percentage of IncomeTaxesReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestPayableCurrent

us-gaap:InterestPayableCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value124.3055.804155.984155.961155.976145.745145.745
Percentage of InterestPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-30
Value1416181719
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0100.0100.0100.0

us-gaap:LettersOfCreditOutstandingAmount us-gaap:CreditFacility

us-gaap:LettersOfCreditOutstandingAmount

us-gaap:RevolvingCreditFacility


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value2028333.0
Percentage of LettersOfCreditOutstandingAmount100.0100.0100.0100.0

us-gaap:LettersOfCreditOutstandingAmount us-gaap:OtherCommitments

hl:PerformanceObligationCommitments


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-30
Value202833383.0
Percentage of LettersOfCreditOutstandingAmount100.0100.0100.00.00.0

us-gaap:LiabilitiesFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:LiabilitiesFairValueDisclosure

us-gaap:FairValueMeasurementsRecurring


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value19197.214111.7028.7068.9680.742.337.31415111.9685.1095.482.6083.8980.283
Percentage of LiabilitiesFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity us-gaap:StatementScenario, us-gaap:CreditFacility

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

srt:ScenarioForecast, us-gaap:RevolvingCreditFacility


None
Period End2020-02-06
Value250
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity100.0

us-gaap:LongTermLineOfCredit

us-gaap:LongTermLineOfCredit


None
Period End2020-06-302020-03-312019-12-31
Value502100.0
Percentage of LongTermLineOfCredit100.0100.00.0

us-gaap:MineReclamationAndClosingLiabilityNoncurrent

us-gaap:MineReclamationAndClosingLiabilityNoncurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312015-12-31
Value99971031031031041049978787980797974
Percentage of MineReclamationAndClosingLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MineReclamationAndClosingLiabilityNoncurrent us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value9391969589909467666667
Percentage of MineReclamationAndClosingLiabilityNoncurrent93.793.892.992.286.086.590.167.684.784.485.1

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value6.2896.0317.4048.14714141032111211
Percentage of MineReclamationAndClosingLiabilityNoncurrent6.36.27.17.814.013.59.932.415.315.614.9

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value13141617192022
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherInventorySupplies

us-gaap:OtherInventorySupplies


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3535353535343433252526242323242323232323232021202121212020141313131212111010108.903
Percentage of OtherInventorySupplies100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherReceivables

us-gaap:OtherReceivables


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-312009-12-31
Value3.8519.1886.4218.0567.3675.1627.4437.6128.9258.9117.0039.03112229.781432161612145.2156.7929.7678.978104.68917208.3837.4667.8276.6626.4459.3130.5452.286
Percentage of OtherReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherReceivables us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value266.062116.2226.8779.5864.184129.71719146.9829.1831720262513
Percentage of OtherReceivables675.266.0186.177.293.3185.756.2170.1108.9221.2211.477.374.677.4205.3188.577.982.3

us-gaap:PreferredStockSharesOutstanding

us-gaap:PreferredStockSharesOutstanding


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-06-302011-01-312010-12-312009-12-31
Value157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.0157820.02012500.0157810.0157820.0157820.0
Percentage of PreferredStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PrepaidTaxes

us-gaap:PrepaidTaxes


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value5.1485.1140.1070.10.28813122.79
Percentage of PrepaidTaxes100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RelatedPartyTransactionDueFromToRelatedParty us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:RelatedPartyTransactionDueFromToRelatedParty

srt:GuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-559.649-565.09-579.83-709.012-364.163-342.867-222.815-222.897-145.439-163.503-177.438
Percentage of RelatedPartyTransactionDueFromToRelatedParty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:NonGuarantorSubsidiaries, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value221224216149-199.609-182.748-171.834-138.477-332.954-338.811-341.182
Percentage of RelatedPartyTransactionDueFromToRelatedParty-39.6-39.7-37.4-21.154.853.377.162.1228.9207.2192.3

srt:ParentCompany, srt:ReportableLegalEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-25.989-15.844-28.381143152162171256281293287
Percentage of RelatedPartyTransactionDueFromToRelatedParty4.62.84.9-20.2-41.8-47.4-77.2-115.2-193.6-179.8-161.9

us-gaap:RelatedPartyTransactionDueFromToRelatedParty us-gaap:ConsolidationItems

srt:ConsolidationEliminations


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value356391416411363222104196208231
Percentage of RelatedPartyTransactionDueFromToRelatedParty-63.1-67.5-58.7-113.1-105.9-100.0-46.9-135.4-127.4-130.4

us-gaap:MaterialReconcilingItems


None
Period End2020-06-302019-12-31
Value363391
Percentage of RelatedPartyTransactionDueFromToRelatedParty-65.0-67.5

us-gaap:RestrictedCashAndCashEquivalentsNoncurrent

us-gaap:RestrictedCashAndCashEquivalentsNoncurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1.0531.0531.0251.0251.0251.0251.0251.011.0051.0051.0321.0761.0982.22.22.1840.9990.9990.9990.9990.9570.8830.8830.8830.8837.7025.2175.3785.2870.8830.8710.8660.8660.8660.8660.9260.926101010
Percentage of RestrictedCashAndCashEquivalentsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SeniorLongTermNotes

us-gaap:SeniorLongTermNotes


None
Period End2020-06-302020-03-312019-12-31
Value468469504
Percentage of SeniorLongTermNotes100.0100.0100.0

us-gaap:TreasuryStockShares

us-gaap:TreasuryStockShares


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value6821000.06287300.06287300.06287300.05941400.05226800.05226800.05226800.05226800.04864800.04529400.04529400.04429800.04085600.03941200.03930100.03733700.03037200.02765000.02765000.02435500.02433500.02151500.02151500.01466600.0932810.0921720.0921720.0921720.0838290.0788290.0497990.0437990.0392640.0392640.0392640.0392640.0337610.0335960.081375.0
Percentage of TreasuryStockShares100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Line plots across dimensions of each concept


us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:StatementBusinessSegments
(None,)
None
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ProductOrService
(None,)
None
us-gaap:CostDepreciationAmortizationAndDepletion
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
(None, 'srt:ReportableLegalEntities')
None
us-gaap:GeneralAndAdministrativeExpense
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
(None, 'srt:ReportableLegalEntities')
None
us-gaap:OperatingIncomeLoss
us-gaap:StatementBusinessSegments
(None,)
None
us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:AwardType
(None,)
None
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
(None, 'srt:ReportableLegalEntities')
None
us-gaap:IncomeTaxExpenseBenefit
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
(None, 'srt:ReportableLegalEntities')
None
us-gaap:NetIncomeLoss
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
(None, 'srt:ReportableLegalEntities')
None
us-gaap:ComprehensiveIncomeNetOfTax
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
(None, 'srt:ReportableLegalEntities')
None
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
(None, 'srt:ReportableLegalEntities')
None
us-gaap:Assets
us-gaap:StatementBusinessSegments
(None,)
None
us-gaap:Assets
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
(None, 'srt:ReportableLegalEntities')
None
us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
(None, 'srt:ReportableLegalEntities')
None
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
None
us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
(None, 'srt:ReportableLegalEntities')
None
us-gaap:CashAndCashEquivalentsAtCarryingValue
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
(None, 'srt:ReportableLegalEntities')
None
us-gaap:PropertyPlantAndEquipmentNet
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
(None, 'srt:ReportableLegalEntities')
None
us-gaap:LiabilitiesCurrent
us-gaap:ConsolidationItems
(None,)
None
us-gaap:LiabilitiesCurrent
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
(None, 'srt:ReportableLegalEntities')
None
us-gaap:LongTermDebtAndCapitalLeaseObligations
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
(None, 'srt:ReportableLegalEntities')
None
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
None
us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
(None, 'srt:ReportableLegalEntities')
None
us-gaap:NetCashProvidedByUsedInOperatingActivities
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
(None, 'srt:ReportableLegalEntities')
None
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
(None, 'srt:ReportableLegalEntities')
None
us-gaap:NetCashProvidedByUsedInOperatingActivities
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
(None, 'srt:ReportableLegalEntities')
None
us-gaap:NetIncomeLoss
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
(None, 'srt:ReportableLegalEntities')
None
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
(None, 'srt:ReportableLegalEntities')
None