CHGG


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

Table of contents



us-gaap:CommonStockValue
us-gaap:StatementEquityComponents
us-gaap:CommonStockSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:IncomeStatementLocation

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:CostOfRevenue

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

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GrossProfit

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaid

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

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestIncomeExpenseNonoperatingNet

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NonoperatingIncomeExpense

us-gaap:OperatingExpenses

us-gaap:OperatingIncomeLoss

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:ResearchAndDevelopmentExpense

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ProductOrService

us-gaap:SellingAndMarketingExpense

us-gaap:Assets

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:CumulativeEffectPeriodOfAdoption
us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:AdjustmentsForNewAccountingPronouncements
us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:LongtermDebtType
us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:StatementEquityComponents
us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:ShortTermInvestments
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType
us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType

us-gaap:AccountsReceivableNetCurrent

us-gaap:OtherAssetsCurrent

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:ProductOrService
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
us-gaap:ProductOrService
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:AmortizationOfIntangibleAssets

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:LongTermInvestments
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType
us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType

us-gaap:Goodwill
us-gaap:BusinessAcquisition

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:AccruedLiabilitiesCurrent
us-gaap:Restatement

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:LiabilitiesCurrent

us-gaap:OperatingLeaseLiabilityCurrent
us-gaap:Restatement

us-gaap:OtherLiabilitiesCurrent

us-gaap:TaxesPayableCurrent

us-gaap:LiabilitiesNoncurrent
chgg:DebtInstrumentComponent, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongTermDebt
chgg:DebtInstrumentTransaction, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
chgg:DebtInstrumentTransactionPeriod, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:CumulativeEffectPeriodOfAdoption
us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:AdjustmentsForNewAccountingPronouncements
us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:LongtermDebtType
us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:StatementEquityComponents
us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit
us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:SubsequentEventType

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:AmortizationOfFinancingCosts

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance

chgg:AdjustmentsToAdditionalPaidInCapitalProceedsFromCappedCall
us-gaap:StatementEquityComponents

chgg:AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCall
us-gaap:StatementEquityComponents

chgg:ContractWithCustomerLiabilityRevenueRecognizedPriorPeriod
us-gaap:DebtInstrument, us-gaap:SubsequentEventType
chgg:DebtConversionRequestedAmount
chgg:DebtInstrumentTransactionPeriod, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
chgg:DebtInstrumentConsiderationTransferred
chgg:DebtInstrumentTransaction, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
chgg:DebtInstrumentConsiderationTransferredEquityInterestsIssuedAndIssuable
chgg:DebtInstrumentTransactionPeriod, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
chgg:DebtInstrumentConvertibleIfConvertedValueLessThanPrincipal
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
chgg:DebtInstrumentDebtConversionConsideration
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
chgg:DebtInstrumentDebtConversionEquityInstrumentsIssuedAmount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
chgg:DebtInstrumentTransaction, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
chgg:DebtInstrumentPrincipalAmountExchangedConsiderationTransferred
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:DepreciationTextbookLibrary
us-gaap:ProductOrService

chgg:FiniteLivedAndIndefiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss

chgg:IncreaseDecreaseInAccountsReceivableNet

chgg:IncreaseDecreaseInContractWithCustomerAssets

chgg:IncreaseDecreaseInContractWithCustomerAssetsPercent

chgg:IncreaseDecreaseinAccountsReceivablePercent

chgg:IncreaseDecreaseinContractwithCustomerLiabilityPercent

chgg:OtherIncomeExpense

chgg:PaymentToPurchasesTextbooks

chgg:PaymentsForConvertibleSeniorNotesCappedCall
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
chgg:PaymentsForInitialPurchasersDiscount
chgg:DebtInstrumentTransaction, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
chgg:ProceedsFromCappedCall

chgg:ProceedsFromDispositionOfTextbooks

chgg:ProceedsFromIssuanceOfEmployeeStockPurchasePlan

chgg:RepaymentsOfConvertibleSeniorNotesAttributableToDebtDiscount

chgg:RevenuefromContractwithCustomerIncludingAssessedTaxIncreaseDecrease
us-gaap:ProductOrService

chgg:RevenuefromContractwithCustomerIncludingAssessedTaxIncreaseDecreasePercent
us-gaap:ProductOrService
us-gaap:SubsidiarySaleOfStock
chgg:SaleOfStockOfferingExpenses
us-gaap:SubsidiarySaleOfStock
chgg:SaleOfStockUnderwritingDiscountsAndCommissions
us-gaap:StatementEquityComponents
chgg:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlanandStockOptionsExercised

chgg:StockIssuedDuringPeriodValueEmployeeStockPurchasePlanandStockOptionsExercised
us-gaap:StatementEquityComponents

chgg:StockIssuedRepaymentForConvertibleSeniorNotes

chgg:TextbookLibraryGainLossNet
us-gaap:ProductOrService

us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt
chgg:DebtInstrumentTransactionPeriod, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebtSubsequentAdjustments
us-gaap:StatementEquityComponents
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:AmortizationOfDebtDiscountPremium

us-gaap:AmortizationOfFinancingCostsAndDiscounts
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisitionsProFormaNetIncomeLoss
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationAcquisitionRelatedCosts

us-gaap:ContractWithCustomerLiabilityRevenueRecognized
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtConversionConvertedInstrumentAmount1
us-gaap:DebtInstrument
us-gaap:DebtConversionOriginalDebtAmount1
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentConvertibleConversionRatio1
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentConvertibleIfConvertedValueInExcessOfPrincipal

us-gaap:DerivativeGainLossOnDerivativeNet

us-gaap:DilutiveSecuritiesEffectOnBasicEarningsPerShareOther

us-gaap:EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount

us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment

us-gaap:EquityMethodInvestmentRealizedGainLossOnDisposal
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentSoldCarryingAmount
chgg:DebtInstrumentTransaction, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:GainLossOnSaleOfDerivatives
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:GoodwillForeignCurrencyTranslationGainLoss

us-gaap:GoodwillPurchaseAccountingAdjustments

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInDeferredRevenue

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInPrepaidExpensesOther

us-gaap:IncrementalCommonSharesAttributableToConversionOfDebtSecurities
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:InterestExpenseDebtExcludingAmortization
us-gaap:LitigationCase, us-gaap:LitigationStatus, us-gaap:SubsequentEventType
us-gaap:LossContingencyNumberOfPlaintiffs

us-gaap:NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1

us-gaap:OperatingLeaseCost
us-gaap:ProductOrService
us-gaap:OperatingLeaseLeaseIncome

us-gaap:OperatingLeasePayments

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherDepreciationAndAmortization

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

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation
us-gaap:BusinessAcquisition
us-gaap:PaymentsToAcquireBusinessesGross

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

us-gaap:PaymentsToAcquireEquityMethodInvestments

us-gaap:PaymentsToAcquireMarketableSecurities

us-gaap:ProceedsFromConvertibleDebt
chgg:DebtInstrumentTransaction, chgg:DebtInstrumentTransactionPeriod, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
chgg:DebtInstrumentTransaction, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:ProceedsFromDebtNetOfIssuanceCosts
chgg:DebtInstrumentTransaction, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

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

us-gaap:ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities

us-gaap:ProceedsFromSaleOfEquityMethodInvestments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionPurchasesFromRelatedParty

us-gaap:RepaymentsOfConvertibleDebt
chgg:DebtInstrumentTransaction, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
chgg:DebtInstrumentTransactionPeriod, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RevenueFromRelatedParties

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:SubsequentEventType
us-gaap:SaleOfStockConsiderationReceivedOnTransaction
us-gaap:SubsidiarySaleOfStock
us-gaap:SubsequentEventType, us-gaap:SubsidiarySaleOfStock
us-gaap:SaleOfStockNumberOfSharesIssuedInTransaction
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesNewIssues
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
us-gaap:StatementEquityComponents

chgg:AccruedContentRelatedCostsCurrent

chgg:AccruedEscrowRelatedToAcquisitionCurrent

chgg:AccruedPurchasesOfLongLivedAssets

chgg:AcquisitionRelatedCompensationLiability

chgg:AvailableforsaleSecuritiesDebtMaturitiesYearOneThroughTwoAmortizedCostBasis

chgg:AvailableforsaleSecuritiesDebtMaturitiesYearOneThroughTwoFairValue
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
chgg:DebtInstrumentConvertibleDiscountForConversionOption
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
chgg:DebtInstrumentConvertibleIssuanceCosts

chgg:DeferredTaxLiabilitiesConvertibleSeniorNotes

chgg:DeferredTaxLiabilitiesPropertyAndEquipmentTextbooksAndIntangibleAssets

chgg:FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour

chgg:OrderFulfillmentFeesLiabilityCurrent

chgg:PaymentProcessingFeesLiabilityCurrent

chgg:TextbookLibraryNet
us-gaap:ProductOrService

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency
us-gaap:CashAndCashEquivalents, us-gaap:InvestmentType
us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:InvestmentType
us-gaap:InvestmentType, us-gaap:UnderlyingAssetClass
us-gaap:CashAndCashEquivalents, us-gaap:InvestmentType
us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:InvestmentType
us-gaap:InvestmentType, us-gaap:UnderlyingAssetClass

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
us-gaap:CashAndCashEquivalents, us-gaap:InvestmentType
us-gaap:InvestmentType
us-gaap:InvestmentType, us-gaap:UnderlyingAssetClass

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue

us-gaap:AvailableForSaleSecuritiesDebtSecurities
us-gaap:CashAndCashEquivalents, us-gaap:InvestmentType
us-gaap:InvestmentType
us-gaap:InvestmentType, us-gaap:UnderlyingAssetClass
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationContingentConsiderationLiability
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:CashAndCashEquivalentsFairValueDisclosure
us-gaap:FairValueByAssetClass, us-gaap:FairValueByMeasurementFrequency

us-gaap:ContractWithCustomerAssetNetCurrent
chgg:DebtInstrumentTransaction, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
chgg:DebtInstrumentTransaction, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentConvertibleConversionPrice1
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentFaceAmount
chgg:DebtInstrumentTransaction, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentRepurchasedFaceAmount
chgg:DebtInstrumentTransactionPeriod, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet
chgg:DebtInstrumentComponent, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DeferredFinanceCostsNet
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsDeferredIncome

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals

us-gaap:DeferredTaxLiabilitiesOther
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:DueToOfficersOrStockholdersCurrent
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:IntangibleAssetsGrossExcludingGoodwill
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType
us-gaap:InvestmentsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
chgg:DebtInstrumentTransaction, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongTermDebtFairValue
us-gaap:DebtInstrument, us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency, us-gaap:LongtermDebtType
us-gaap:LitigationCase, us-gaap:LitigationStatus
us-gaap:LossContingencyEstimateOfPossibleLoss

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent
us-gaap:IncomeTaxAuthority
us-gaap:OperatingLossCarryforwards

us-gaap:PrepaidExpenseCurrent
us-gaap:RestrictedCashAndCashEquivalentsCashAndCashEquivalents
us-gaap:RestrictedCash

us-gaap:RestrictedCashAndCashEquivalentsAtCarryingValue

us-gaap:RestrictedCashAndCashEquivalentsNoncurrent
us-gaap:SubsequentEventType, us-gaap:SubsidiarySaleOfStock
us-gaap:SaleOfStockPricePerShare
us-gaap:SubsidiarySaleOfStock

us-gaap:SeniorLongTermNotes

us-gaap:SeniorNotesCurrent
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
us-gaap:LongtermDebtType
us-gaap:SharePrice

us-gaap:StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
us-gaap:IncomeTaxAuthority
us-gaap:TaxCreditCarryforwardAmount

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued

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

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Expenses
Other Nonoperating Income Expense
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Operating Lease Right Of Use Asset
Current Assets
Accounts Receivable Net Current
NonCurrent Assets
Operating Lease Right Of Use Asset
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Operating Lease Liability
Current Liabilities
Taxes Payable Current
Stockholders Equity
Retained Earnings Accumulated Deficit
CashFlow
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInOperatingActivities
Increase Decrease In Accounts Payable
NetCashProvidedByUsedInInvestingActivities
Payments To Acquire Businesses Net Of Cash Acquired
Shares
Weighted Average Number Of Share Outstanding Basic And Diluted
OperatingLeaseLiability
Operating Lease Liability Current
NonoperatingIncomeExpense
Nonoperating Income Expense
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four
FiniteLivedIntangibleAssets
Finite Lived Intangible Assets Net
AccountsReceivable
Allowance For Doubtful Accounts Receivable Current

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:CommonStockValue ██▆▆▆▆▅▅▅▅▅▅▅▄▄▄▃▂▂▂▂▂▂▂▂▁▁▁▁▁▁0.1450.1410.1290.1290.1240.1240.1220.1210.1190.1180.1160.1150.1140.1130.110.1080.0960.0940.0920.0910.0910.090.0880.0880.0880.0860.0840.0840.0840.0830.082NANANA
 us-gaap:CommonStockSharesOutstanding us-gaap:StatementEquityComponents us-gaap:CommonStock█▇▅▅▄▄▃▃▃▃▂▂▂▂▁144.621141.317129.344128.654124.123123.543121.584120.669119.336118.197115.5114.598113.551112.749109.668NANANA91.709NANANA88.1NANANA84.008NANANA81.708NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding 168.282NA141.297126.194133.851122.428129.15120.085118.79116.73125.61114.184112.738110.904121.557103.04195.04792.83NANANANA93.22587.70686.74184.79486.54383.68883.20982.18145.82512.87312.55812.031
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic 143.112NA128.955126.194123.842122.428121.151120.085118.79116.73115.123114.184112.738110.904108.968103.04195.04792.8391.52691.05990.41689.11887.99387.70686.74184.79483.92583.70483.25582.25945.82513.05412.81212.367
us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted NA134.352NA126.194NA122.428NA120.085118.79116.73NA114.184112.738110.904NA103.04195.04792.83NA91.05990.41689.118NA87.70686.74184.794NA83.68883.20982.181NA12.87312.55812.031
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount ▁█1.4132.381NA12.9890.1138.344NA10.05810.18613.363NA12.67811.44812.87NA0.0513.43410.063NA11.24415.85714.466NA8.6799.28813.112NA15.27517.32922.777NA57.90857.77857.962
us-gaap:EarningsPerShareBasic 0.23NA0.2-0.290.09-0.050.07-0.1-0.02-0.040.05-0.12-0.03-0.020.03-0.11-0.06-0.07-0.02-0.17-0.1-0.180.04-0.28-0.12-0.340.02-0.39-0.1-0.31-2.36-2.27-0.27-1.48
us-gaap:EarningsPerShareDiluted 0.2NA0.18-0.290.08-0.050.06-0.1-0.02-0.040.04-0.12-0.03-0.020.03-0.11-0.06-0.07NANANANA0.04-0.28-0.12-0.340.02-0.39-0.1-0.31-2.36-2.27-0.27-1.48
us-gaap:EarningsPerShareBasicAndDiluted NA-0.490.21000000000000002-0.29NA-0.050.06999999999999999-0.1-0.02-0.040.04999999999999999-0.12-0.03-0.020.04999999999999999-0.11-0.06-0.07-0.019999999999999962-0.17-0.1-0.180.04999999999999993-0.28-0.12-0.340.020000000000000018-0.39-0.1-0.31-3.54-2.27-0.27-1.48
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
 TTM Greenblatt ROC _ _▇▅█▂▆▄▅▃▄▄▄▃▄▄▄▃▃▃▄▂▃▂▄▂▃▁▄▁▃▂▃34.7716.77949.218-17.80222.0613.27617.086-5.0576.815-1.0277.544-10.433-0.711-2.623.011-11.16-5.282-5.536-1.074-15.331-8.375-15.294.062-23.802-9.697-28.2632.743-32.634-9.642-25.601-8.49NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:AllocatedShareBasedCompensationExpense █▆▇▆▅▅▅▅▄▄▄▄▃▃▃▃▂▂▂▃▃▃▂▂▂▄▃▃▂▂▇▁▁▁28.54523.124.64621.52919.54618.33417.55416.86515.45215.03814.52713.81812.04311.64210.89110.0919.0998.2789.08410.2111.22111.276.9918.9337.83115.029.68311.7948.4816.9325.073.8573.8814.15
us-gaap:ComprehensiveIncomeNetOfTax █▁█▃▇▅▆▅▆▅▆▅▅▆▆▅▅▅▆▅▅▅▆▄▅▄▆▃▅▄▅▄▅▄33.032-67.94726.24-37.65717.801-9.9798.881-12.617-1.747-4.1995.293-14.013-4.708-2.1973.358-11.573-5.872-6.302-1.517-16.028-9.087-15.6173.547-24.27-10.148-28.4981.676-32.47-8.219-25.752-5.438-29.243-3.371-17.854
us-gaap:CostOfRevenue ▇█▆▇▄▄▂▂▁▂▂▁▁▁▁▂▁▂▁▄▂▄▂▇▃▇▄█▄▇▄▆▃▅60.70871.38457.13362.3743.52442.3926.16522.16420.51823.33522.0719.91817.78420.22419.38122.35617.04221.39620.57238.69921.40738.92326.3861.7236.25665.49338.62368.28138.59665.48537.57458.42529.60749.454
us-gaap:GainsLossesOnExtinguishmentOfDebt █▁█0.0-78.152-0.971NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType chgg:A0.125PercentConvertibleSeniorNotesDue2025,us-gaap:SeniorNotesNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType chgg:A0.25PercentConvertibleSeniorNotesDue2023,us-gaap:SeniorNotesNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:GeneralAndAdministrativeExpense █▇▆█▆▅▅▅▄▅▄▄▄▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▄▁▁▁39.71937.8731.12840.78431.29226.14527.44523.75222.62223.6719.97920.019.47918.25617.24817.3214.50115.34214.23213.90514.56912.6669.42912.0611.94311.77710.35710.98610.6549.8419.9566.2477.5746.709
us-gaap:GrossProfit ▇▇█▅▆▅▆▄▄▄▄▃▄▄▃▃▃▃▃▂▂▂▃▂▂▂▃▁▂▁▃▁▂▁137.77126.994148.58891.648109.48589.299.33971.98773.34474.07473.60654.31956.43856.72554.12640.28439.27541.20642.48532.64431.62927.73141.77419.56630.80519.37945.79413.25125.8968.90839.5423.16226.2511.561
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments █▁█▃▆▅▆▅▅▅▆▅▅▅▆▅▅▅▅▄▅▄▆▄▅▃▆▃▅▄▅▃▅▄34.989-62.35828.528-36.07411.876-5.1919.021-10.854-1.446-3.6925.095-12.996-3.481-2.0763.5-10.918-5.309-5.754-1.245-15.509-8.499-15.2853.996-23.778-9.701-28.2482.743-32.16-9.613-25.542-5.317-29.05-3.201-17.64
us-gaap:IncomeTaxExpenseBenefit ▇█▇▅▅▄▅▄▄▄▃▄▄▄▃▄▄▄▄▄▄▄▄▄▄▄▅▄▁▄▃▄▄▄2.2252.8212.4851.0661.2870.5220.8020.6230.5830.626-0.2520.7130.4280.541-0.1590.5980.7160.6470.2440.5540.5090.40.3660.3890.430.2941.0550.281-1.3670.2170.10.2050.1520.185
us-gaap:IncomeTaxesPaid NANA0.9861.2030.4910.7560.5780.580.2860.6260.5370.6160.4410.5030.5490.420.4330.3880.2630.579-0.150.4020.1410.1150.1480.4230.1070.0730.0850.360.0410.0470.250.091
us-gaap:IncomeTaxesPaidNet ▁█1.2053.063NANA0.4910.756NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:InterestExpenseDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType chgg:A0.125PercentConvertibleSeniorNotesDue2025,us-gaap:SeniorNotes▁▁███████▁0.9581.0459.8059.8049.6989.6989.8059.8059.7780.559NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:InterestExpenseDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType chgg:A0.25PercentConvertibleSeniorNotesDue2023,us-gaap:SeniorNotes▁▁▄▆██████████0.0860.2341.6212.9193.7123.7123.7523.7533.7083.6733.7533.7553.6313.673NANANANANANANANANANANANANANANANANANANANA
 us-gaap:InterestExpenseDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType chgg:A0ConvertibleSeniorNotesDue2026,us-gaap:SeniorNotes▁▁█▄0.6570.6510.584.716NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InterestIncomeExpenseNet ▇▇▁▂▄▄▄▄▄▇▇▇▇█████████████████-1.701-1.929-21.977-17.468-13.425-13.427-13.557-13.548-13.514-4.232-3.769-3.772-3.664-0.02-0.018-0.019-0.018-0.019-0.02-0.03-0.061-0.06-0.065-0.061-0.06-0.061-0.062-0.067-0.127-0.061NANANANA
us-gaap:InterestIncomeExpenseNonoperatingNet ▁█1.8512.049NANA3.1934.856NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InterestPaidNet ▂▇▄█▆▇▆▆▆▁▇▁▁▁▁0.1130.5020.220.6150.4310.50.4310.470.4310.00.550.0180.0180.0190.019NANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss █▁█▃▆▅▆▅▆▅▆▅▅▅▆▅▅▅▆▅▅▅▆▄▅▄▆▃▅▄▅▄▅▄32.764-65.17926.043-37.1410.589-5.7138.219-11.477-2.029-4.3185.347-13.709-3.909-2.6173.659-11.516-6.025-6.401-1.489-16.063-9.008-15.6853.63-24.167-10.131-28.5421.688-32.441-8.246-25.759-5.417-29.255-3.353-17.825
us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted 33.976NANANA10.589NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NonoperatingIncomeExpense █▁▆▆▇▇▇▇▇███▇██████████████████▇██0.219-79.137-20.69-18.272-10.185-8.467-8.065-5.797-8.261-2.665-2.449-2.563-2.770.5440.4890.242-0.027-0.218-0.171-0.178-0.1240.005-0.0660.024-0.0040.0150.00.4740.0290.0593.173-4.146-1.734-1.47
us-gaap:OperatingExpenses ▇█▇█▆▆▆▅▄▅▄▄▃▄▃▃▂▃▂▃▂▂▂▂▂▃▂▃▂▂▃▁▁▁103.0110.21599.37109.4587.42485.92482.25377.04466.52975.10166.06264.75257.14959.34551.11551.44444.55746.74243.55947.97540.00443.02137.71243.36840.50247.64243.05145.88535.53834.50948.03228.06627.71727.731
us-gaap:OperatingIncomeLoss ▇▅█▂▆▄▅▃▄▄▄▃▄▄▄▃▃▃▄▂▃▂▄▂▃▁▄▁▃▂▃▂▄▂34.7716.77949.218-17.80222.0613.27617.086-5.0576.815-1.0277.544-10.433-0.711-2.623.011-11.16-5.282-5.536-1.074-15.331-8.375-15.294.062-23.802-9.697-28.2632.743-32.634-9.642-25.601-8.49-24.904-1.467-16.17
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax ▄▂██▆▁▆▁▄▄▄▃▁▆▄▄▅▅▄▅▄▅▄▄▄▄▄▄▄▄▄▄▄▄-0.107-0.8741.0821.1250.381-0.9990.373-1.067-0.0510.0-0.064-0.347-0.9130.511-0.162-0.0090.1530.099-0.0280.035-0.0710.035-0.054-0.1190.00.0220.006-0.011-0.0270.023-0.0030.012-0.018-0.029
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▄▂▄▃█▁▄▃▄▄▄▃▃▄▃▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄0.268-2.7680.197-0.5177.212-4.2660.662-1.140.2820.119-0.054-0.304-0.7990.42-0.301-0.0570.1530.099-0.0280.035-0.0790.068-0.083-0.103-0.0170.044-0.012-0.0290.0270.007-0.0210.012-0.018-0.029
us-gaap:OtherNonoperatingIncomeExpense █▁▇▇█████▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇█▇▇▇1.92-77.2081.287-0.8043.244.965.4927.7515.2531.5671.321.2090.8940.5640.5070.261-0.009-0.199-0.151-0.148-0.0630.065-0.0010.0850.0560.0760.0620.5410.1560.123.329-2.84-0.551-0.297
us-gaap:ResearchAndDevelopmentExpense ▇██▇▇▇▆▆▅▅▅▅▄▄▃▃▃▃▂▂▂▂▂▂▂▂▂▂▁▁▂▁▁▁41.59546.13146.94944.04140.37439.54138.57336.44232.06532.69233.49529.04526.21825.53322.84919.87619.89919.30217.09916.24116.03316.95814.31515.66413.26816.14412.38713.4912.18911.3212.5939.9999.7999.553
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ███▆▆▅▄▃▃▃▃▂▂▂▂▁▁▁▁▂▁▂▂▂▂▂▂▂▂▂▂▁▁▁198.478198.378205.721154.018153.009131.59125.50494.15193.86297.40995.67674.23774.22276.94973.50762.6456.31762.60263.05771.34353.03666.65468.15481.28667.06184.87284.41781.53264.49274.39377.11661.58755.85761.015
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax NANA205.721154.018153.009131.59125.50494.15193.86297.40995.67674.23774.22276.94973.50762.6456.31762.60263.05771.34353.03666.65468.15481.28667.06184.87284.41781.53264.49274.39377.11661.58755.85761.015
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService chgg:CheggServicesNANA175.97118.895126.004100.359107.31869.30480.30775.29281.65854.20161.84956.27760.47339.47544.741.035NANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService chgg:RequiredMaterialsNANA29.75135.12327.00531.23118.18624.84713.55522.11714.01820.03612.37320.67213.03423.16511.61721.567NANANANANANANANANANANANANANANANA
us-gaap:SellingAndMarketingExpense ▆█▆▇▄▆▄▄▂▅▂▄▂▄▂▃▂▄▃▄▂▃▃▄▂▆▅▇▃▄▃▃▁▃21.68626.21421.29324.62515.75820.23816.23516.82211.79518.71712.25115.6911.43715.33610.99414.18410.09815.96412.515.25611.74714.44614.09716.21112.38221.39219.01823.45314.81715.02713.65714.2238.67413.748
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:Assets ██▆▆▄▄▄▄▄▃▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁3150.9473193.5612251.2582341.6571539.8781495.0041488.9981463.6921415.6831309.215760.938752.292720.571423.478446.93440.152268.157280.976290.652316.208292.888274.716291.356322.057287.564309.728318.127348.133314.522332.765327.371NANANA
us-gaap:Liabilities ▇█▇▇▅▅▄▄▄▄▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁1813.0651950.2181641.6231696.2651041.51032.077990.169995.18956.112881.078350.304363.711331.85253.46755.86871.19846.10166.91468.713101.10571.15554.31960.281101.99852.21974.28771.084113.40359.16680.83753.131NANANA
us-gaap:LiabilitiesAndStockholdersEquity ██▆▆▄▄▄▄▄▃▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁3150.9473193.5612251.2582341.6571539.8781495.0041488.9981463.6921415.6831309.215760.938752.292720.571423.478446.93440.152268.157280.976290.652316.208292.888274.716291.356322.057287.564309.728318.127348.133314.522332.765327.371NANANA
us-gaap:StockholdersEquity █▇▃▄▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁1337.8821243.343609.635645.392498.378462.927498.829468.512459.571428.137410.634388.581388.719370.011391.062368.954222.056214.062221.939215.103221.733220.397231.075220.059235.345235.441247.043234.73255.356251.928274.24NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:AssetsCurrent █▇▅▅▃▄▄▄▄▄▂▂▂▁▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁2116.2671935.6261182.9551299.496742.138807.768807.267844.069847.8991018.88494.925502.288490.409214.843228.942240.80489.357103.915111.373139.282108.43124.13132.835151.24999.156102.166110.814111.04974.552108.406124.309NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▇▆▅▅▃▄▄▄▅█▄▄▄▂▂▂▁▁▁▂▁▁▁▂▁▁▁▁▁▁▁▁▁▁840.056656.168479.853527.541285.064359.101387.52450.457555.792914.5374.664379.02384.926106.827126.457122.22766.08670.29477.32990.21349.67941.50467.02980.94135.08750.02856.11753.18630.78339.4476.86415.92721.63930.294
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▇▆▄▅▃▃▄▄▅█▄▄▄▁▁▁▁▁▁841.776657.936481.715529.59287.09360.968389.432451.763556.979915.541375.945379.721385.409107.334126.963122.67166.54870.75777.433NANANA67.809NANANANANANANANANANANA
us-gaap:ShortTermInvestments ██▅▅▃▃▃▃▂▁▁▁▁▁▁▁1221.6661215.944665.567723.327417.53404.794381.074345.392259.39970.0893.34580.89880.93882.26481.74280.914NANA0.00.00.020.00217.821.36527.40928.86733.34630.03528.4354.37637.071NANANA
us-gaap:AccountsReceivableNetCurrent ▄▅▆▆▃▁▅▇▁▃▆▃▃▃▅▄▃▃▃▄▆▅▆▃▅▄▇█▄▃▂10.09111.63312.91312.4878.8346.49311.52913.6785.9488.8712.7338.628.0968.05510.8559.8438.758.7879.2069.48112.91910.95513.1579.32312.13110.67414.39615.7589.9139.3457.091NANANA
us-gaap:OtherAssetsCurrent ▅▅▃▄▃▄▄▅▃▂▂▅▂▂▂▅▂▄▅▇██▆▆▄▁▁▂▁▁▁25.64326.62511.84621.05914.6519.52816.60624.88814.6089.6919.5126.6517.7426.8987.84523.9557.57116.63722.25935.5740.22443.19231.73233.83416.8723.9863.8648.6791.7742.1811.112NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:PropertyPlantAndEquipmentGross NANA224.417NANANA154.955NANANA115.078NANANA87.923NANANA63.136NANANA37.898NANANA33.599NANANA31.021NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:ProductOrService chgg:TextbookLibraryNANA47.29344.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:ComputerEquipmentNANA3.368NANANA3.355NANANA3.14NANANA2.449NANANA1.597NANANA1.313NANANA1.083NANANA1.594NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:FurnitureAndFixturesNANA3.891NANANA3.64NANANA2.912NANANA2.893NANANA2.148NANANA1.652NANANA2.259NANANA2.207NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LeaseholdImprovementsNANA19.574NANANA17.738NANANA14.167NANANA7.154NANANA5.342NANANA4.983NANANA5.153NANANA4.407NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:MediaContentNANA181.938NANANA122.67NANANA90.816NANANA70.11NANANA49.725NANANA27.359NANANA21.262NANANA17.725NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:SoftwareAndSoftwareDevelopmentCostsNANA15.646NANANA7.552NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment NANA98.61NANANA67.596NANANA55.174NANANA40.43NANANA27.831NANANA17.927NANANA15.23NANANA12.057NANANA
 us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment us-gaap:ProductOrService chgg:TextbookLibraryNANA13.1449.2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AmortizationOfIntangibleAssets us-gaap:FiniteLivedIntangibleAssetsByMajorClass chgg:AcquisitionRelatedIntangibleAssetsNANA4.44.43.02.52.51.51.71.81.81.81.41.41.41.41.41.41.41.41.20.60.71.11.41.61.71.71.00.60.71.01.21.5
us-gaap:PropertyPlantAndEquipmentNet █▇▇▆▆▅▅▄▄▄▃▃▃▃▃▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁149.627134.093125.807113.058105.6497.88987.35977.66776.96272.93759.90452.94551.51648.19747.49345.07840.29436.77835.30530.76629.35623.36119.97118.53718.56917.89218.36918.29818.93318.99418.964NANANA
us-gaap:LongTermInvestments ▆█▆▆▄▄▄▄▄▁▁▁▁▁▁▁484.853711.224523.628521.261280.492273.114310.483340.118288.68212.53316.05214.96115.95710.62820.30517.013NANA0.00.00.02.8784.2292.9354.7270.01.45114.12419.29536.67124.32NANANA
us-gaap:Goodwill █████▆▆▄▄▄▄▄▄▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▁▁290.725290.601285.214284.809284.682214.323214.513149.068149.466149.481149.524149.762135.842125.525125.272116.239116.239116.239116.239114.98114.9891.30191.30191.30191.30191.30191.30186.68586.68549.60549.545NANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▆▇▇▇█▄▅▃▃▃▃▄▃▃▃▂▂▃▃▃▃▁▁▁▁▂▂46.6249.79851.24955.38659.52232.07534.66720.62222.37424.09725.91527.81322.59119.90221.15316.59917.9719.34520.74821.65923.0618.2378.8659.51110.62912.06613.626NANANA3.311NANANA
us-gaap:FiniteLivedIntangibleAssetsNet NANA47.64951.78655.92228.47531.06717.02218.77420.49722.31524.21318.99116.30217.55312.99914.3715.74517.14818.05919.4614.6375.2655.9117.0298.46610.02610.97212.6643.153.311NANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:CustomerListsNANA5.7536.4727.191.431.762.0982.442.7823.1233.4653.8074.1484.494.8325.3175.8076.2976.6387.1350.4870.5810.6750.7691.1821.7182.0642.7230.2970.443NANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:DevelopedTechnologyRightsNANA30.15241.23644.48123.23924.87314.9115.81416.84617.9319.01213.5529.80510.4375.4615.9186.3756.8327.2387.7112.4982.7152.953.4994.0494.5985.0955.692.2572.622NANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:MediaContentNANA7.84NANANA10.286NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:NoncompeteAgreementsNANA0.0370.0560.080.1040.1280.1530.1780.2170.2830.350.1960.2440.2920.270.3390.4080.4790.5430.6150.250.3880.5250.6630.80.9381.0681.2320.0430.006NANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:TradeNamesNANA3.7254.1464.5674.2254.7040.4320.6510.9511.251.5711.5791.9332.3282.4362.7963.1553.5153.5823.9091.2771.4231.571.7161.8622.0082.22.4290.1620.24NANANA
us-gaap:OperatingLeaseRightOfUseAsset ▇██▅▅▅▆▆▅▆▁21.122.61724.22614.12415.20714.60815.93116.31214.75615.90.0NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ███▆█▇▆▅▅▅▅▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁24.07325.60224.0318.94825.06823.55418.77815.83615.54415.41214.6184.5234.2564.3833.7654.4194.2974.6994.4125.5655.2274.1694.4273.8821.9221.7321.8041.82.162.0241.814NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:AccountsPayableCurrent ▄█▅▃▄▇▄▃▂▄▅▃▃▃▄▂▁▂▃▅▄▃▄▇▃▃▆▄▅▂▃6.21114.9028.5475.8386.42113.6057.3624.1973.1316.3418.1774.2835.3373.9817.0492.1090.8093.2615.1757.9926.264.3075.8611.9823.8324.84610.9456.0639.8133.7424.078NANANA
us-gaap:AccruedLiabilitiesCurrent ▇█▆█▅▄▃▅▃▃▃▄▂▂▂▄▂▄▄▆▄▁▃▃▂▁▂▂▁▁▁72.64478.08961.96279.52450.06747.24139.96452.19937.42535.70634.07746.99929.4626.41831.07441.9427.86141.00544.31959.03446.42719.27435.2839.67423.90320.18731.18329.56319.99119.82621.27NANANA
us-gaap:ContractWithCustomerLiabilityCurrent ▅▇▄█▃▅▁▃▁▃▁34.68248.60832.6251.94128.3235.75318.7827.45718.82126.27617.418NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesCurrent ▃█▃▄▃▃▂▃▂▂▂▂▁▁▁▂▁▂▂▃▂▁▁▃▁▂▂▃▁▂▁113.537251.093109.732142.95590.493101.83371.38988.83564.15172.96359.67276.56348.50749.02451.56365.95541.12762.37264.3397.0367.14550.3556.11197.73747.48770.00266.719108.08853.97975.68448.152NANANA
us-gaap:OperatingLeaseLiabilityCurrent NANA6.6035.6525.6855.2345.2834.9824.7744.640.0NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingLeaseLiabilityCurrent us-gaap:Restatement srt:RevisionOfPriorPeriodReclassificationAdjustmentNANA-6.6NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesCurrent NANA17.313NANANA17.942NANANA14.047NANANA13.706NANANA13.956NANANA23.474NANANA15.543NANANA9.915NANANA
us-gaap:TaxesPayableCurrent NANA6.166NANANA3.046NANANA3.864NANANA3.337NANANA2.927NANANA3.913NANANA4.851NANANA3.067NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:LiabilitiesNoncurrent ██▇▇▅▅▅▅▅▄▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁1699.5281699.1251531.8911553.31951.007930.244918.78906.345891.961808.115290.632287.148283.3454.4434.3055.2434.9744.5424.3834.0754.013.9694.174.2614.7324.2854.3655.3155.1875.1534.979NANANA
 us-gaap:LongTermDebt chgg:DebtInstrumentComponent,us-gaap:DebtInstrument,us-gaap:LongtermDebtType chgg:DebtInstrumentLiabilityComponent,chgg:A0ConvertibleSeniorNotesDue2026,us-gaap:SeniorNotesNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt chgg:DebtInstrumentTransaction,us-gaap:DebtInstrument,us-gaap:LongtermDebtType chgg:ExchangeOfAggregatePrincipalAmount,chgg:A0.25PercentConvertibleSeniorNotesDue2023,us-gaap:SeniorNotesNANA152.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt chgg:DebtInstrumentTransaction,us-gaap:DebtInstrument,us-gaap:LongtermDebtType chgg:ExtinguishmentOfAggregatePrincipalAmount,chgg:A0.25PercentConvertibleSeniorNotesDue2023,us-gaap:SeniorNotesNANA51.6NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt chgg:DebtInstrumentTransactionPeriod,us-gaap:DebtInstrument,us-gaap:LongtermDebtType chgg:SettlementOfPrincipalDuringSixMonths,chgg:A0.25PercentConvertibleSeniorNotesDue2023,us-gaap:SeniorNotes114.2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt chgg:DebtInstrumentTransactionPeriod,us-gaap:DebtInstrument,us-gaap:LongtermDebtType chgg:SettlementOfPrincipalDuringThreeMonths,chgg:A0.25PercentConvertibleSeniorNotesDue2023,us-gaap:SeniorNotes109.6NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType chgg:A0.25PercentConvertibleSeniorNotesDue2023,us-gaap:SeniorNotesNANA115.6NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent ▅▅▃▂█▂▂▁▁▁▄▄▄8.3777.6285.7054.66511.8673.9833.9643.8153.5923.3116.9647.0166.767NA4.305NANANANANANANANANANA4.2854.3655.3155.1875.1534.979NANANA
us-gaap:OperatingLeaseLiabilityNoncurrent ▇▇█▅▆▆▆▇▆▇▁15.81117.55119.26411.66112.94713.01214.51315.31514.24315.4240.0NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA7.59NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA5.604NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA2.559NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA1.823NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA3.618NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:StockholdersEquity █▇▃▄▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁1337.8821243.343609.635645.392498.378462.927498.829468.512459.571428.137410.634388.581388.719370.011391.062368.954222.056214.062221.939215.103221.733220.397231.075220.059235.345235.441247.043234.73255.356251.928274.24NANANA
us-gaap:CommonStockValue ██▆▆▆▆▅▅▅▅▅▅▅▄▄▄▃▂▂▂▂▂▂▂▂▁▁▁▁▁▁0.1450.1410.1290.1290.1240.1240.1220.1210.1190.1180.1160.1150.1140.1130.110.1080.0960.0940.0920.0910.0910.090.0880.0880.0880.0860.0840.0840.0840.0830.082NANANA
us-gaap:AdditionalPaidInCapitalCommonStock ██▄▄▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁1706.8551645.3521030.5771092.574907.908890.258916.095894.66873.104839.924818.113801.355787.48764.065782.845764.097605.638591.774593.351584.999575.601565.179560.242552.773543.789533.739516.845506.208494.364482.718479.279NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▃▂▂▁▂▂▂▂▂▂▂▂▂▃▃▃▃▃▃▃▄▄▄▄▅▅▆▆▇▇█-368.148-400.912-422.601-448.644-411.504-422.093-416.292-424.511-413.034-411.005-406.576-411.924-398.214-394.305-391.611-395.27-383.754-377.729-371.328-369.839-353.776-344.768-329.083-332.713-308.546-298.415-269.873-271.561-239.12-230.874-205.115NANANA
 us-gaap:RetainedEarningsAccumulatedDeficit us-gaap:CumulativeEffectPeriodOfAdoption,us-gaap:AdjustmentsForNewAccountingPronouncements,us-gaap:SubsequentEventType srt:CumulativeEffectPeriodOfAdoptionAdjustment,chgg:AccountingStandardsUpdate202006,us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▅▅█▇█▁▅▄▆▅▅▅▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆-0.97-1.2381.531.3331.85-5.362-1.096-1.758-0.618-0.9-1.019-0.965-0.6610.138-0.2820.0190.076-0.077-0.176-0.148-0.183-0.104-0.172-0.0890.0140.031-0.013-0.0010.0280.001-0.006NANANA
us-gaap:StockIssuedDuringPeriodValueNewIssues ▁█0.01091.466NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital▁█0.01091.455NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents us-gaap:CommonStock▁█0.00.011NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue █▆▆▅▄▄▃▃▃▂▂▂▁▁29.19223.64724.64621.52919.54618.33417.55416.86515.45215.03814.52713.81812.04311.642NANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ███▆▇▇▄▅▅▄▅▄▄▃▄▃▄▃▂▅▃▁▁▅70.92873.57367.78746.4559.23862.96726.82838.72929.90517.94130.44621.15216.9626.55321.70113.29115.3210.835-5.78837.84912.11-19.233-18.19631.173NANANANA-6.54429.142NANA-7.09429.579
us-gaap:NetCashProvidedByUsedInInvestingActivities █▁▇▂▆▆▆▆▃▇▆▆▆▇▆▆▇▇▇▇▇▇▇▇190.168-764.95218.156-572.46-131.22-47.262-93.041-145.635-477.92213.173-36.455-26.915-23.4154.236-25.329-105.341-7.5491.985-6.3643.498-3.1360.0393.80614.63NANANANA-3.633-63.201NANA-3.627-20.726
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁█▁▇▂▂▂▂▃▅▂▂▄▂▂▃▂▂▂▂▂▂▂▂-77.256867.6-133.818768.51-1.896-44.1693.8821.6989.455508.4822.2330.075284.528-30.4187.858148.191-11.98-9.855-0.732-0.813-0.799-6.3310.4780.051NANANANA1.52-3.365NANA2.0660.411
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect █▁183.84176.221NA242.5-73.878-28.464NA-105.216-358.562539.596NA-5.688278.075-19.629NA56.123-4.209-6.676NANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
 us-gaap:AmortizationOfFinancingCosts us-gaap:DebtInstrument,us-gaap:LongtermDebtType chgg:A0.125PercentConvertibleSeniorNotesDue2025,us-gaap:SeniorNotes▇█▆▆▆▆▆▆▆▁0.740.8080.6140.6140.6070.6080.6140.6140.6130.035NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AmortizationOfFinancingCosts us-gaap:DebtInstrument,us-gaap:LongtermDebtType chgg:A0.25PercentConvertibleSeniorNotesDue2023,us-gaap:SeniorNotes▁▃▃▆██████████0.0740.1680.1650.2920.3710.3720.3760.3750.3680.3690.3760.3770.3640.369NANANANANANANANANANANANANANANANANANANANA
 us-gaap:AmortizationOfFinancingCosts us-gaap:DebtInstrument,us-gaap:LongtermDebtType chgg:A0ConvertibleSeniorNotesDue2026,us-gaap:SeniorNotes██▆▁0.6570.650.5030.225NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DeferredIncomeTaxExpenseBenefit NANA-0.0920.2210.073-0.311-0.0980.020.0390.00.5350.0NANA0.2820.0NANANANANANANANANANANANANANANANANANA
us-gaap:IncreaseDecreaseInAccountsPayable ▁▇▆▄▅▅▅▅▃▄▆▄▅▄▇▅▄▄▃▅▆▄▂█▄▃▇▄▆▅▄▇▅▄-9.7366.5972.753-1.06-0.138-0.4361.5881.434-3.581-1.8363.894-1.2891.356-3.0684.941.3-2.452-1.139-3.4411.6972.625-1.609-6.2138.127-1.212-4.9385.356-3.3073.774-0.786-2.6355.6040.0-2.999
us-gaap:IncreaseDecreaseInAccountsReceivable ▃▂▄▆▄▁▂█▂▁▆▄▄▂▄▄▄▃▄▅▃▃▃▄▅▂▃▄▄▅▃▄▅▄-1.222-2.240.5063.8550.968-4.929-2.6797.794-2.92-4.0243.9470.20.191-2.80.9611.203-0.042-1.9470.4392.295-0.446-2.161-1.1110.5152.318-2.434-1.9241.422-0.0162.227-0.9080.1491.4450.788
us-gaap:NetCashProvidedByUsedInOperatingActivities ███▆▇▇▄▅▅▄▅▄▄▃▄▃▄▃▂▅▃▁▁▅70.92873.57367.78746.4559.23862.96726.82838.72929.90517.94130.44621.15216.9626.55321.70113.29115.3210.835-5.78837.84912.11-19.233-18.19631.173NANANANA-6.54429.142NANA-7.09429.579
us-gaap:NetIncomeLoss █▁█▃▆▅▆▅▆▅▆▅▅▅▆▅▅▅▆▅▅▅▆▄▅▄▆▃▅▄▅▄▅▄32.764-65.17926.043-37.1410.589-5.7138.219-11.477-2.029-4.3185.347-13.709-3.909-2.6173.659-11.516-6.025-6.401-1.489-16.063-9.008-15.6853.63-24.167-10.131-28.5421.688-32.441-8.246-25.759-5.417-29.255-3.353-17.825
us-gaap:ShareBasedCompensation █▆▇▆▅▅▅▅▄▄▄▄▃▃▃▃▂▂▂▃▃▃▂▂▂▄▃▃▂▂▇▁▁▁28.54523.124.64621.52919.54618.33417.55416.86515.45215.03814.52713.81812.04311.64210.89110.0919.0998.2789.08410.2111.22111.276.9918.9337.83115.029.68311.7948.4816.9325.073.8573.8814.15
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities █▁▇▂▆▆▆▆▃▇▆▆▆▇▆▆▇▇▇▇▇▇▇▇190.168-764.95218.156-572.46-131.22-47.262-93.041-145.635-477.92213.173-36.455-26.915-23.4154.236-25.329-105.341-7.5491.985-6.3643.498-3.1360.0393.80614.63NANANANA-3.633-63.201NANA-3.627-20.726
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment █▆▇▄▇▆▄▃▃▄▄▃▂▂▂▃▃▂▂▂▃▂▁▁▁▁▁▁▁▁▁▁▁▁27.61118.98423.8614.34623.14619.96510.8068.0299.43114.0613.1757.9615.2044.8836.2127.4237.7374.776.8553.6179.4174.82.3691.7382.661.4861.2761.3111.2111.2852.1652.0161.6441.544
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁█▁▇▂▂▂▂▃▅▂▂▄▂▂▃▂▂▂▂▂▂▂▂-77.256867.6-133.818768.51-1.896-44.1693.8821.6989.455508.4822.2330.075284.528-30.4187.858148.191-11.98-9.855-0.732-0.813-0.799-6.3310.4780.051NANANANA1.52-3.365NANA2.0660.411
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value145000.0141000.0129000.0129000.0124000.0124000.0122000.0121000.0119000.0118000.0116000.0115000.0114000.0113000.0110000.0108000.096000.094000.092000.091000.091000.090000.088000.088000.088000.086000.084000.084000.084000.083000.082000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding us-gaap:StatementEquityComponents

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStock


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value144141129128124123121120119118115114113112109918884811212
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1681411261331221291201181161251141121101211039592938786848683838245121212
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value143128126123122121120118116115114112110108103959291919089878786848383838245131212
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Share Outstanding Basic And Diluted

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted


Weighted
Period End2021-03-312020-09-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value1341261221201181161141121101039592919089878684838382121212
Percentage of WeightedAverageNumberOfShareOutstandingBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value1.4132120.1138.3441010131211120.0513.434101115148.6799.28813151722575757
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

chgg:RestrictedStockUnitsRSUsAndPerformanceShareUnitsPSUs


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-31
Value1.1372.9823.3940.1033.3163.8313.7876.7327.4797.0798.7910.0490.1071.8880.6244.6893.011
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount80.69.226.191.239.738.137.250.459.061.868.396.13.118.85.529.620.8

us-gaap:EmployeeStock


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value0.0050.0250.0090.010.010.0070.00.0410.0170.00.00.00.0080.00.00.0180.0850.0060.0080.0260.00.00.023
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount0.40.10.18.80.10.10.00.30.10.00.00.00.20.00.00.10.60.10.10.20.00.00.1

us-gaap:SeniorNotes


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value0.268288.7210.03.9684.0983.6463.3321.2210.00.00.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount19.089.067.10.047.640.735.824.99.60.00.00.0

us-gaap:StockOption


Antidilutive
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value0.5560.8650.01.052.1222.7533.2583.9614.3694.0790.0023.1197.9751010118.1568.84912131517131212
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount1.76.70.012.621.127.024.431.238.231.73.990.879.392.769.177.294.095.394.691.289.977.322.522.222.3

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.230.2-0.290.09-0.050.07-0.1-0.02-0.040.05-0.12-0.03-0.020.03-0.11-0.06-0.07-0.02-0.17-0.1-0.180.04-0.28-0.12-0.340.02-0.39-0.1-0.31-2.36-2.27-0.27-1.48
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.20.18-0.290.08-0.050.06-0.1-0.02-0.040.04-0.12-0.03-0.020.03-0.11-0.06-0.070.04-0.28-0.12-0.340.02-0.39-0.1-0.31-2.36-2.27-0.27-1.48
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic And Diluted

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:EarningsPerShareBasicAndDiluted


Earnings
Period End2021-03-312020-12-312020-09-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-0.490.21-0.29-0.050.07-0.1-0.02-0.040.05-0.12-0.03-0.020.05-0.11-0.06-0.07-0.02-0.17-0.1-0.180.05-0.28-0.12-0.340.02-0.39-0.1-0.31-3.54-2.27-0.27-1.48
Percentage of EarningsPerShareBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value282324211918171615151413121110109.0998.2789.0841011116.9918.9337.831159.683118.4816.93253.8573.8814.15
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.411.612.014.012.813.914.017.916.515.415.218.616.215.114.816.116.213.214.414.321.216.910.311.011.717.711.514.513.29.332.56.36.96.8

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:IncomeStatementLocation

us-gaap:CostOfSales


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.4190.3620.3060.2620.2130.1690.1310.0960.0740.1250.1170.1060.1030.0940.0880.0730.0880.0670.0570.0460.0410.028-0.0560.1030.0810.1340.1450.160.1340.1780.7630.1260.1420.154
Percentage of AllocatedShareBasedCompensationExpense1.51.61.21.21.10.90.70.60.50.80.80.80.90.80.80.71.00.80.60.50.40.2-0.81.21.00.91.51.41.62.63.03.33.73.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.20.10.20.10.10.10.10.10.10.10.10.10.10.10.10.20.10.10.10.10.0-0.10.10.10.20.20.20.20.21.00.20.30.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CostOfSales0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:GeneralAndAdministrativeExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value151113109.2778.9889.0959.1858.4068.1887.8367.5096.6815.8265.3855.0514.4233.8444.7955.115.595.2232.8125.245.4435.1254.113.9233.4493.038141.6371.5591.333
Percentage of AllocatedShareBasedCompensationExpense53.851.353.748.347.549.051.854.554.454.453.954.355.550.049.450.148.646.452.850.049.846.340.258.769.534.142.433.340.743.858.742.440.232.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.76.06.46.86.16.87.29.89.08.48.210.19.07.67.38.17.96.17.67.210.57.84.16.48.16.04.94.85.34.119.12.72.82.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:GeneralAndAdministrativeExpense0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ResearchAndDevelopmentExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value9.17.9598.5448.4337.626.9916.3535.7415.2184.9174.8654.5283.5294.1333.9993.7063.3873.2413.5643.4493.6324.1262.5483.4641.2734.7072.1993.2352.6352.3824.541.531.731.614
Percentage of AllocatedShareBasedCompensationExpense31.934.534.739.239.038.136.234.033.832.733.532.829.335.536.736.737.239.239.233.832.436.636.438.816.331.322.727.431.134.418.139.744.638.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.64.04.25.55.05.35.16.15.65.05.16.14.85.45.45.96.05.25.74.86.86.23.74.31.95.52.64.04.13.25.92.53.12.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ResearchAndDevelopmentExpense0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:SellingAndMarketingExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value3.6552.9192.5532.4312.4362.1861.9751.8431.7541.8081.7091.6751.731.5891.4191.2611.2011.1260.6681.6051.9581.8931.6870.1261.0345.0543.2294.4762.2631.3325.0440.5640.451.049
Percentage of AllocatedShareBasedCompensationExpense12.812.610.411.312.511.911.310.911.412.011.812.114.413.613.012.513.213.67.415.717.416.824.11.413.233.633.338.026.719.220.114.611.625.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.81.51.21.61.61.71.62.01.91.91.82.32.32.11.92.02.11.81.12.23.72.82.50.21.56.03.85.53.51.86.50.90.81.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:SellingAndMarketingExpense0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value33-67.94726-37.65717-9.9798.881-12.617-1.747-4.1995.293-14.013-4.708-2.1973.358-11.573-5.872-6.302-1.517-16.028-9.087-15.6173.547-24.27-10.148-28.4981.676-32.47-8.219-25.752-5.438-29.243-3.371-17.854
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.6-34.312.8-24.411.6-7.67.1-13.4-1.9-4.35.5-18.9-6.3-2.94.6-18.5-10.4-10.1-2.4-22.5-17.1-23.45.2-29.9-15.1-33.62.0-39.8-12.7-34.6-7.1-47.5-6.0-29.3

Cost Of Revenue

us-gaap:CostOfRevenue

us-gaap:CostOfRevenue


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value60715762434226222023221917201922172120382138266136653868386537582949
Percentage of CostOfRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax30.636.027.840.528.432.220.823.521.924.023.126.824.026.326.435.730.334.232.654.240.458.438.775.954.177.245.883.759.888.048.794.953.081.1

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2021-06-302021-03-312020-12-31
Value0-78152000.0-971000.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0-39.4-0.5

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

chgg:A0.125PercentConvertibleSeniorNotesDue2025, us-gaap:SeniorNotes


Gains
Period End2020-08-31
Value-78200000.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax chgg:A0.125PercentConvertibleSeniorNotesDue2025 us-gaap:SeniorNotes0.0

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Gains
Period End2020-08-31
Value-3300000.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax chgg:A0.25PercentConvertibleSeniorNotesDue2023 us-gaap:SeniorNotes0.0

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value393731403126272322231920191817171415141314129.4291211111010109.84196.2477.5746.709
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.019.115.126.520.519.921.925.224.124.320.926.926.223.723.527.725.724.522.619.527.519.013.814.817.813.912.313.516.513.225.910.113.611.0

Gross Profit

us-gaap:GrossProfit

us-gaap:GrossProfit


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value137126148911098999717374735456565440394142323127411930194513258.908393.1622611
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax69.464.072.259.571.667.879.276.578.176.076.973.276.073.773.664.369.765.867.445.859.641.661.324.145.922.854.216.340.212.051.35.147.018.9

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value34-62.35828-36.07411-5.1919.021-10.854-1.446-3.6925.095-12.996-3.481-2.0763.5-10.918-5.309-5.754-1.245-15.509-8.499-15.2853.996-23.778-9.701-28.2482.743-32.16-9.613-25.542-5.317-29.05-3.201-17.64
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.6-31.413.9-23.47.8-3.97.2-11.5-1.5-3.85.3-17.5-4.7-2.74.8-17.4-9.4-9.2-2.0-21.7-16.0-22.95.9-29.3-14.5-33.33.2-39.4-14.9-34.3-6.9-47.2-5.7-28.9

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2225000.02821000.02485000.01066000.01287000.0522000.0802000.0623000.0583000.0626000.0-252000.0713000.0428000.0541000.0-159000.0598000.0716000.0647000.0244000.0554000.0509000.0400000.0366000.0389000.0430000.0294000.01055000.0281000.0-1367000.0217000.0100000.0205000.0152000.0185000.0
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.11.41.20.70.80.40.60.70.60.6-0.31.00.60.7-0.21.01.31.00.40.81.00.60.50.50.60.31.20.3-2.10.30.10.30.30.3

Income Taxes Paid

us-gaap:IncomeTaxesPaid

us-gaap:IncomeTaxesPaid


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value986000.01203000.0491000.0756000.0578000.0580000.0286000.0626000.0537000.0616000.0441000.0503000.0549000.0420000.0433000.0388000.0263000.0579000.0-150000.0402000.0141000.0115000.0148000.0423000.0107000.073000.085000.0360000.041000.047000.0250000.091000.0
Percentage of IncomeTaxesPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.80.30.60.50.60.30.60.60.80.60.70.70.70.80.60.40.8-0.30.60.20.10.20.50.10.10.10.50.10.10.40.1

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-06-302021-03-312020-06-302020-03-31
Value1205000.03063000.0491000.0756000.0
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.61.50.30.6

Interest Expense Debt

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

us-gaap:InterestExpenseDebt

chgg:A0.125PercentConvertibleSeniorNotesDue2025, us-gaap:SeniorNotes


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.9581.0459.8059.8049.6989.6989.8059.8059.7780.559
Percentage of InterestExpenseDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.54.86.46.37.47.810.410.40.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax chgg:A0.125PercentConvertibleSeniorNotesDue2025 us-gaap:SeniorNotes0.00.00.00.00.00.00.00.00.00.0

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.0860.2341.6212.9193.7123.7123.7523.7533.7083.6733.7533.7553.6313.673
Percentage of InterestExpenseDebt9.022.416.529.838.338.338.338.337.9657.10.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.10.81.92.42.83.04.04.03.83.95.14.94.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax chgg:A0.25PercentConvertibleSeniorNotesDue2023 us-gaap:SeniorNotes0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

chgg:A0ConvertibleSeniorNotesDue2026, us-gaap:SeniorNotes


Interest
Period End2021-06-302021-03-312020-12-312020-09-30
Value0.6570.65104.716
Percentage of InterestExpenseDebt68.662.2107.948.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.35.13.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax chgg:A0ConvertibleSeniorNotesDue2026 us-gaap:SeniorNotes0.00.00.00.0

Interest Income Expense Net

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestIncomeExpenseNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-1701000.0-1929000.0-21977000.0-17468000.0-13425000.0-13427000.0-13557000.0-13548000.0-13514000.0-4232000.0-3769000.0-3772000.0-3664000.0-20000.0-18000.0-19000.0-18000.0-19000.0-20000.0-30000.0-61000.0-60000.0-65000.0-61000.0-60000.0-61000.0-62000.0-67000.0-127000.0-61000.0
Percentage of InterestIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.9-1.0-10.7-11.3-8.8-10.2-10.8-14.4-14.4-4.3-3.9-5.1-4.9-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.2-0.1

Interest Income Expense Nonoperating Net

us-gaap:InterestIncomeExpenseNonoperatingNet

us-gaap:InterestIncomeExpenseNonoperatingNet


Interest
Period End2021-06-302021-03-312020-06-302020-03-31
Value1851000.02049000.03193000.04856000.0
Percentage of InterestIncomeExpenseNonoperatingNet100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.91.02.13.7

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value113000.0502000.0220000.0615000.0431000.0500000.0431000.0470000.0431000.00550000.018000.018000.019000.019000.0
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.30.10.40.30.40.30.50.50.00.60.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value32-65.17926-37.1410-5.7138.219-11.477-2.029-4.3185.347-13.709-3.909-2.6173.659-11.516-6.025-6.401-1.489-16.063-9.008-15.6853.63-24.167-10.131-28.5421.688-32.441-8.246-25.759-5.417-29.255-3.353-17.825
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.5-32.912.7-24.16.9-4.36.5-12.2-2.2-4.45.6-18.5-5.3-3.45.0-18.4-10.7-10.2-2.4-22.5-17.0-23.55.3-29.7-15.1-33.62.0-39.8-12.8-34.6-7.0-47.5-6.0-29.2

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value32-65.17926-37.1410-5.7138.219-11.477-2.029-4.3185.347-13.709-3.909-2.617
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.5-32.912.7-24.16.9-4.36.5-12.2-2.2-4.45.6-18.5-5.3-3.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Diluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted


Net
Period End2021-06-302020-06-30
Value3310
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.16.9

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense

us-gaap:NonoperatingIncomeExpense


Nonoperating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value219000.0-79137000.0-20690000.0-18272000.0-10185000.0-8467000.0-8065000.0-5797000.0-8261000.0-2665000.0-2449000.0-2563000.0-2770000.0544000.0489000.0242000.0-27000.0-218000.0-171000.0-178000.0-124000.05000.0-66000.024000.0-4000.015000.00474000.029000.059000.03173000.0-4146000.0-1734000.0-1470000.0
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.1-39.9-10.1-11.9-6.7-6.4-6.4-6.2-8.8-2.7-2.6-3.5-3.70.70.70.4-0.0-0.3-0.3-0.2-0.20.0-0.10.0-0.00.00.00.60.00.14.1-6.7-3.1-2.4

Operating Expenses

us-gaap:OperatingExpenses

us-gaap:OperatingExpenses


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value10311099109878582776675666457595151444643474043374340474345353448282727
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax51.955.648.371.157.165.365.581.870.977.169.087.277.077.169.582.179.174.769.167.275.464.555.353.460.456.151.056.355.146.462.345.649.645.4

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value341649-17.802223.27617-5.0576.815-1.0277.544-10.433-0.711-2.623.011-11.16-5.282-5.536-1.074-15.331-8.375-15.294.062-23.802-9.697-28.2632.743-32.634-9.642-25.601-8.49-24.904-1.467-16.17
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.58.523.9-11.614.42.513.6-5.47.3-1.17.9-14.1-1.0-3.44.1-17.8-9.4-8.8-1.7-21.5-15.8-22.96.0-29.3-14.5-33.33.2-40.0-15.0-34.4-11.0-40.4-2.6-26.5

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

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-107000.0-874000.01082000.01125000.0381000.0-999000.0373000.0-1067000.0-51000.00-64000.0-347000.0-913000.0511000.0-162000.0-9000.0153000.099000.0-28000.035000.0-71000.035000.0-54000.0-119000.0022000.06000.0-11000.0-27000.023000.0-3000.012000.0-18000.0-29000.0
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.1-0.40.50.70.2-0.80.3-1.1-0.10.0-0.1-0.5-1.20.7-0.2-0.00.30.2-0.00.0-0.10.1-0.1-0.10.00.00.0-0.0-0.00.0-0.00.0-0.0-0.0

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value268000.0-2768000.0197000.0-517000.07212000.0-4266000.0662000.0-1140000.0282000.0119000.0-54000.0-304000.0-799000.0420000.0-301000.0-57000.0153000.099000.0-28000.035000.0-79000.068000.0-83000.0-103000.0-17000.044000.0-12000.0-29000.027000.07000.0-21000.012000.0-18000.0-29000.0
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.1-1.40.1-0.34.7-3.20.5-1.20.30.1-0.1-0.4-1.10.5-0.4-0.10.30.2-0.00.0-0.10.1-0.1-0.1-0.00.1-0.0-0.00.00.0-0.00.0-0.0-0.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1.92-77.2081.287-0.8043.244.965.4927.7515.2531.5671.321.2090.8940.5640.5070.261-0.009-0.199-0.151-0.148-0.0630.065-0.0010.0850.0560.0760.0620.5410.1560.123.329-2.84-0.551-0.297
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.0-38.90.6-0.52.13.84.48.25.61.61.41.61.20.70.70.4-0.0-0.3-0.2-0.2-0.10.1-0.00.10.10.10.10.70.20.24.3-4.6-1.0-0.5

Research And Development Expense

us-gaap:ResearchAndDevelopmentExpense

us-gaap:ResearchAndDevelopmentExpense


Research
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value414646444039383632323329262522191919171616161415131612131211129.9999.7999.553
Percentage of ResearchAndDevelopmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.023.322.828.626.430.030.738.734.233.635.039.135.333.231.131.735.330.827.122.830.225.421.019.319.819.014.716.518.915.216.316.217.515.7

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value198198205154153131125949397957474767362566263715366688167848481647477615561
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService

chgg:CheggServices


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1731621751181261001076980758154615660394441
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax87.481.885.577.282.476.385.573.685.677.385.373.083.373.182.363.079.465.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax87.481.885.577.282.476.385.573.685.677.385.373.083.373.182.363.079.465.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax chgg:CheggServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

chgg:RequiredMaterials


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value243629352731182413221420122013231121
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.618.214.522.817.623.714.526.414.422.714.727.016.726.917.737.020.634.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.618.214.522.817.623.714.526.414.422.714.727.016.726.917.737.020.634.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax chgg:RequiredMaterials100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenue From Contract With Customer Including Assessed Tax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value205154153131125949397957474767362566263715366688167848481647477615561
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService

chgg:CheggServices


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1751181261001076980758154615660394441
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax85.577.282.476.385.573.685.677.385.373.083.373.182.363.079.465.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax85.577.282.476.385.573.685.677.385.373.083.373.182.363.079.465.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax chgg:CheggServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

chgg:RequiredMaterials


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value29352731182413221420122013231121
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax14.522.817.623.714.526.414.422.714.727.016.726.917.737.020.634.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.522.817.623.714.526.414.422.714.727.016.726.917.737.020.634.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax chgg:RequiredMaterials100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Selling And Marketing Expense

us-gaap:SellingAndMarketingExpense

us-gaap:SellingAndMarketingExpense


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value21262124152016161118121511151014101512151114141612211923141513148.67413
Percentage of SellingAndMarketingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.913.210.416.010.315.412.917.912.619.212.821.115.419.915.022.617.925.519.821.422.121.720.719.918.525.222.528.823.020.217.723.115.522.5

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value3150319322512341153914951488146314151309760752720423446440268280290316292274291322287309318348314332327
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value181319501641169610411032990995956881350363331535571466668101715460101527471113598053
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets57.561.172.972.467.669.066.568.067.567.346.048.346.112.612.516.217.223.823.632.024.319.820.731.718.224.022.332.618.824.316.2

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value3150319322512341153914951488146314151309760752720423446440268280290316292274291322287309318348314332327
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value13371243609645498462498468459428410388388370391368222214221215221220231220235235247234255251274-86.127-51.894
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets42.538.927.127.632.431.033.532.032.532.754.051.753.987.487.583.882.876.276.468.075.780.279.368.381.876.077.767.481.275.783.80.00.0

us-gaap:StockholdersEquity us-gaap:CumulativeEffectPeriodOfAdoption

srt:CumulativeEffectPeriodOfAdoptionAdjustment


Stockholders
Period End2020-12-312019-12-312018-12-31
Value-0.088-0.088-0.111
Percentage of StockholdersEquity-0.0-0.0-0.0
Percentage of Assets-0.0-0.0-0.0
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment0.00.00.0

us-gaap:StockholdersEquity us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:AdjustmentsForNewAccountingPronouncements

srt:CumulativeEffectPeriodOfAdoptionAdjustment, chgg:AccountingStandardsUpdate202006


Stockholders
Period End2020-12-31
Value-378.138
Percentage of StockholdersEquity-62.0
Percentage of Assets-16.8
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment chgg:AccountingStandardsUpdate2020060.0

us-gaap:StockholdersEquity us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:LongtermDebtType

srt:CumulativeEffectPeriodOfAdoptionAdjustment, chgg:AccountingStandardsUpdate202006, us-gaap:SeniorNotes


Stockholders
Period End2020-12-31
Value378
Percentage of StockholdersEquity62.0
Percentage of Assets16.8
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment chgg:AccountingStandardsUpdate202006 us-gaap:SeniorNotes0.0

us-gaap:StockholdersEquity us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:StatementEquityComponents

srt:CumulativeEffectPeriodOfAdoptionAdjustment, chgg:AccountingStandardsUpdate202006, us-gaap:AdditionalPaidInCapital


Stockholders
Period End2020-12-31
Value-465.006
Percentage of StockholdersEquity-76.3
Percentage of Assets-20.7
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment chgg:AccountingStandardsUpdate202006 us-gaap:AdditionalPaidInCapital0.0

srt:CumulativeEffectPeriodOfAdoptionAdjustment, chgg:AccountingStandardsUpdate202006, us-gaap:RetainedEarnings


Stockholders
Period End2020-12-31
Value-86.868
Percentage of StockholdersEquity-14.2
Percentage of Assets-3.9
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment chgg:AccountingStandardsUpdate202006 us-gaap:RetainedEarnings0.0

us-gaap:StockholdersEquity us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:StatementEquityComponents

srt:CumulativeEffectPeriodOfAdoptionAdjustment, us-gaap:AdditionalPaidInCapital


Stockholders
Period End2020-12-31
Value-465.006
Percentage of StockholdersEquity-76.3
Percentage of Assets-20.7
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment us-gaap:AdditionalPaidInCapital0.0

srt:CumulativeEffectPeriodOfAdoptionAdjustment, us-gaap:RetainedEarnings


Stockholders
Period End2020-12-312019-12-312018-12-31
Value-0.088-0.088-0.111
Percentage of StockholdersEquity-0.0-0.0-0.0
Percentage of Assets-0.0-0.0-0.0
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment us-gaap:RetainedEarnings0.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value-0.97-1.2381.531.3331.85-5.362-1.096-1.758-0.618-0.9-1.019-0.965-0.6610.138-0.282-0.176-0.172-0.013-0.0060.05
Percentage of StockholdersEquity-0.1-0.10.30.20.4-1.2-0.2-0.4-0.1-0.2-0.2-0.2-0.20.0-0.1-0.1-0.1-0.0-0.0-0.1
Percentage of Assets-0.0-0.00.10.10.1-0.4-0.1-0.1-0.0-0.1-0.1-0.1-0.10.0-0.1-0.1-0.1-0.0-0.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value17061645103010929078909168948738398188017877647825935605164796348
Percentage of StockholdersEquity127.6132.3169.0169.3182.2192.3183.6191.0190.0196.2199.2206.2202.6206.5200.2267.3242.5209.2174.8-73.2-93.1
Percentage of Assets54.251.545.846.759.059.561.561.161.764.2107.5106.5109.3180.4175.2204.1192.3162.5146.40.00.0
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


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value0.1450.1410.1290.1290.1240.1240.1220.1210.1190.1180.1160.1150.1140.1130.110.0920.0880.0840.0820.0120.012
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-0.0-0.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value-368.148-400.912-422.601-448.644-411.504-422.093-416.292-424.511-413.034-411.005-406.576-411.923-398.214-394.305-391.611-371.328-329.083-269.873-205.115-149.265-100.222
Percentage of StockholdersEquity-27.5-32.2-69.3-69.5-82.6-91.2-83.5-90.6-89.9-96.0-99.0-106.0-102.4-106.6-100.1-167.3-142.4-109.2-74.8173.3193.1
Percentage of Assets-11.7-12.6-18.8-19.2-26.7-28.2-28.0-29.0-29.2-31.4-53.4-54.8-55.3-93.1-87.6-127.8-112.9-84.8-62.70.00.0
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

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value21161935118212997428078078448471018494502490214228240891031111391081241321519910211011174108124
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets67.260.652.555.548.254.054.257.759.977.865.066.868.150.751.254.733.337.038.344.037.045.245.647.034.533.034.831.923.732.638.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value8406564795272853593874505559143743793841061261226670779049416780355056533039761521302134
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets26.720.521.322.518.524.026.030.839.369.949.250.453.425.228.327.824.625.026.628.517.015.123.025.112.216.217.615.39.811.923.50.00.00.00.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value84165748152928736038945155691537537938510712612266707767
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets26.720.621.422.618.624.126.230.939.369.949.450.553.525.328.427.924.825.226.623.3

Short Term Investments

us-gaap:ShortTermInvestments

us-gaap:ShortTermInvestments


Short
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value12211215665723417404381345259709380808281800.00.00.020172127283330285437
Percentage of ShortTermInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets38.838.129.630.927.127.125.623.618.35.412.310.811.219.418.318.40.00.00.07.36.16.69.59.310.58.69.016.311.3

us-gaap:ShortTermInvestments us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:AgencySecurities


Short
Period End2021-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-03-312015-12-31
Value15151025100.00.00.00.00.00.03.4983.494
Percentage of ShortTermInvestments1.33.72.67.23.90.00.00.00.00.00.017.519.6
Percentage of Assets0.51.00.71.70.70.00.00.00.00.00.01.31.2
Percentage of Assets us-gaap:FairValueInputsLevel2 us-gaap:FairValueMeasurementsRecurring us-gaap:AgencySecurities0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CommercialPaper


Short
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312015-12-31
Value5146052042047.48948582840293631383.746
Percentage of ShortTermInvestments42.149.830.728.22.014.022.640.543.436.445.138.147.521.0
Percentage of Assets16.319.09.18.70.53.34.12.25.33.95.17.48.71.3
Percentage of Assets us-gaap:FairValueInputsLevel2 us-gaap:FairValueMeasurementsRecurring us-gaap:CommercialPaper0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CorporateBondSecurities


Short
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value691610461519402357319233146263840343022181210141618188.1755.2028.835
Percentage of ShortTermInvestments56.650.269.371.896.488.483.867.556.437.441.350.143.237.628.123.560.659.367.559.762.855.227.218.316.2
Percentage of Assets21.919.120.522.226.123.921.415.910.32.05.15.44.97.35.14.34.43.64.55.75.95.82.31.72.7
Percentage of Assets us-gaap:FairValueInputsLevel2 us-gaap:FairValueMeasurementsRecurring us-gaap:CorporateBondSecurities0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ShortTermInvestments us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType

us-gaap:FairValueMeasurementsRecurring, us-gaap:AgencySecurities


Short
Period End2021-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-03-312015-12-31
Value15151025101514109.45819193.4983.494
Percentage of ShortTermInvestments1.33.72.67.23.922.115.313.511.724.324.417.519.6
Percentage of Assets0.51.00.71.70.71.21.91.41.34.74.51.31.2
Percentage of Assets us-gaap:FairValueMeasurementsRecurring us-gaap:AgencySecurities0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueMeasurementsRecurring, us-gaap:CommercialPaper


Short
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312015-12-31
Value5146052042047.48948582840293631383.746
Percentage of ShortTermInvestments42.149.830.728.22.014.022.640.543.436.445.138.147.521.0
Percentage of Assets16.319.09.18.70.53.34.12.25.33.95.17.48.71.3
Percentage of Assets us-gaap:FairValueMeasurementsRecurring us-gaap:CommercialPaper0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueMeasurementsRecurring, us-gaap:CorporateBondSecurities


Short
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value691610461519402357319233146263840343022181210141618188.1755.2028.835
Percentage of ShortTermInvestments56.650.269.371.896.488.483.867.556.437.441.350.143.237.628.123.560.659.367.559.762.855.227.218.316.2
Percentage of Assets21.919.120.522.226.123.921.415.910.32.05.15.44.97.35.14.34.43.64.55.75.95.82.31.72.7
Percentage of Assets us-gaap:FairValueMeasurementsRecurring us-gaap:CorporateBondSecurities0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value101112128.8346.49311135.9488.87128.628.0968.055109.8438.758.7879.2069.4811210139.323121014159.9139.3457.091
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.40.60.50.60.40.80.90.40.71.71.11.11.92.42.23.33.13.23.04.44.04.52.94.23.44.54.53.22.82.2

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value2526112114191624149.6919.51267.7426.8987.845237.57116223540433133163.9863.8648.6791.7742.1811.112
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.80.50.91.01.31.11.71.00.71.23.51.11.61.85.42.85.97.711.213.715.710.910.55.91.31.22.50.60.70.3

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value2241541158763373331
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.010.415.119.721.713.010.69.5

us-gaap:PropertyPlantAndEquipmentGross us-gaap:ProductOrService

chgg:TextbookLibrary


Property
Period End2020-12-312020-09-30
Value4744
Percentage of PropertyPlantAndEquipmentGross21.10.0
Percentage of Assets2.11.9
Percentage of Assets chgg:TextbookLibrary0.00.0

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

us-gaap:ComputerEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value3.3683.3553.142.4491.5971.3131.0831.594
Percentage of PropertyPlantAndEquipmentGross1.52.22.72.82.53.53.25.1
Percentage of Assets0.10.20.40.50.50.50.30.5
Percentage of Assets us-gaap:ComputerEquipment0.00.00.00.00.00.00.00.0

us-gaap:FurnitureAndFixtures


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value3.8913.642.9122.8932.1481.6522.2592.207
Percentage of PropertyPlantAndEquipmentGross1.72.32.53.33.44.46.77.1
Percentage of Assets0.20.20.40.60.70.60.70.7
Percentage of Assets us-gaap:FurnitureAndFixtures0.00.00.00.00.00.00.00.0

us-gaap:LeaseholdImprovements


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1917147.1545.3424.9835.1534.407
Percentage of PropertyPlantAndEquipmentGross8.711.412.38.18.513.115.314.2
Percentage of Assets0.91.21.91.61.81.71.61.3
Percentage of Assets us-gaap:LeaseholdImprovements0.00.00.00.00.00.00.00.0

us-gaap:MediaContent


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value181122907049272117
Percentage of PropertyPlantAndEquipmentGross81.179.278.979.778.872.263.357.1
Percentage of Assets8.18.211.915.717.19.46.75.4
Percentage of Assets us-gaap:MediaContent0.00.00.00.00.00.00.00.0

us-gaap:SoftwareAndSoftwareDevelopmentCosts


Property
Period End2020-12-312019-12-31
Value157.552
Percentage of PropertyPlantAndEquipmentGross7.04.9
Percentage of Assets0.70.5
Percentage of Assets us-gaap:SoftwareAndSoftwareDevelopmentCosts0.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value9867554027171512
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.44.57.39.09.66.24.83.7

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment us-gaap:ProductOrService

chgg:TextbookLibrary


Accumulated
Period End2020-12-312020-09-30
Value139.2
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment13.30.0
Percentage of Assets0.60.4
Percentage of Assets chgg:TextbookLibrary0.00.0

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:AmortizationOfIntangibleAssets

chgg:AcquisitionRelatedIntangibleAssets


Amortization
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value4.44.43.02.52.51.51.71.81.81.81.41.41.41.41.41.41.41.41.20.60.71.11.41.61.71.71.00.60.71.01.21.5
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets chgg:AcquisitionRelatedIntangibleAssets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value1491341251131059787777672595251484745403635302923191818171818181818
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.74.25.64.86.96.55.95.35.45.67.97.07.111.410.610.215.013.112.19.710.08.56.95.86.55.85.85.36.05.75.8

Long Term Investments

us-gaap:LongTermInvestments

us-gaap:LongTermInvestments


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value484711523521280273310340288121614151020170.00.00.02.8784.2292.9354.7270.01.45114193624
Percentage of LongTermInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0
Percentage of Assets15.422.323.322.318.218.320.923.220.41.02.12.02.22.54.53.90.00.00.01.01.50.91.60.00.54.16.111.07.4

us-gaap:LongTermInvestments us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:AgencySecurities


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value9.00138396460181529600.00.00.00.0
Percentage of LongTermInvestments1.95.57.512.421.76.84.88.820.80.00.00.00.0
Percentage of Assets0.31.21.72.83.91.21.02.04.20.00.00.00.0
Percentage of Assets us-gaap:FairValueInputsLevel2 us-gaap:FairValueMeasurementsRecurring us-gaap:AgencySecurities0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CorporateBondSecurities


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value4756724844562192542953102281014131420
Percentage of LongTermInvestments98.194.592.587.678.393.295.291.279.287.089.989.289.8100.0
Percentage of Assets15.121.021.519.514.317.019.821.216.20.81.91.82.04.5
Percentage of Assets us-gaap:FairValueInputsLevel2 us-gaap:FairValueMeasurementsRecurring us-gaap:CorporateBondSecurities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LongTermInvestments us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType

us-gaap:FairValueMeasurementsRecurring, us-gaap:AgencySecurities


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value9.00138396460181529601.6351.6281.6191.621
Percentage of LongTermInvestments1.95.57.512.421.76.84.88.820.813.010.110.810.2
Percentage of Assets0.31.21.72.83.91.21.02.04.20.10.20.20.2
Percentage of Assets us-gaap:FairValueMeasurementsRecurring us-gaap:AgencySecurities0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueMeasurementsRecurring, us-gaap:CorporateBondSecurities


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value4756724844562192542953102281014131420
Percentage of LongTermInvestments98.194.592.587.678.393.295.291.279.287.089.989.289.8100.0
Percentage of Assets15.121.021.519.514.317.019.821.216.20.81.91.82.04.5
Percentage of Assets us-gaap:FairValueMeasurementsRecurring us-gaap:CorporateBondSecurities0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value2902902852842842142141491491491491491351251251161161161161141149191919191918686494949
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.29.112.712.218.514.314.410.210.611.419.619.918.929.628.026.443.341.440.036.439.333.231.328.331.729.528.724.927.614.915.10.0

us-gaap:Goodwill us-gaap:BusinessAcquisition

chgg:TechnologyCompany


Goodwillus-gaap:
Period End2021-02-22
Value5.8
Percentage of Goodwill0.0
Percentage of Assets0.0
Percentage of Assets chgg:TechnologyCompany0.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value4649515559323420222425272219211617192021238.2378.8659.5111012133.311
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.51.62.32.43.92.12.31.41.61.83.43.73.14.74.73.86.76.97.16.87.93.03.03.03.73.94.31.0

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value475155283117182022241816171214151718194.6375.2655.9117.0298.4661010123.153.311
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.12.23.61.92.11.21.31.62.93.22.63.83.93.05.45.65.95.76.61.71.81.82.42.73.23.24.00.91.0

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerLists


Finite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value5.7536.4727.191.431.762.0982.442.7823.1233.4653.8074.1484.494.8325.3175.8076.2976.6387.1350.4870.5810.6750.7691.1821.7182.0642.7230.2970.443
Percentage of FiniteLivedIntangibleAssetsNet12.112.512.95.05.712.313.013.614.014.320.025.425.637.237.036.936.736.836.710.511.011.410.914.017.118.821.59.413.4
Percentage of Assets0.30.30.50.10.10.10.20.20.40.50.51.01.01.12.02.12.22.12.40.20.20.20.30.40.50.60.90.10.1
Percentage of Assets us-gaap:CustomerLists0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DevelopedTechnologyRights


Finite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value30414423241415161719139.805105.4615.9186.3756.8327.2387.7112.4982.7152.953.4994.0494.5985.0955.692.2572.622
Percentage of FiniteLivedIntangibleAssetsNet63.379.679.581.680.187.684.282.280.378.571.460.159.542.041.240.539.840.139.653.951.649.949.847.845.946.444.971.779.2
Percentage of Assets1.31.82.91.61.71.01.11.32.42.51.92.32.31.22.22.32.42.32.60.90.90.91.21.31.41.51.80.70.8
Percentage of Assets us-gaap:DevelopedTechnologyRights0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:MediaContent


Finite
Period End2020-12-312019-12-31
Value7.8410
Percentage of FiniteLivedIntangibleAssetsNet16.533.1
Percentage of Assets0.30.7
Percentage of Assets us-gaap:MediaContent0.00.0

us-gaap:NoncompeteAgreements


Finite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value0.0370.0560.080.1040.1280.1530.1780.2170.2830.350.1960.2440.2920.270.3390.4080.4790.5430.6150.250.3880.5250.6630.80.9381.0681.2320.0430.006
Percentage of FiniteLivedIntangibleAssetsNet0.10.10.10.40.40.90.91.11.31.41.01.51.72.12.42.62.83.03.25.47.48.99.49.49.49.79.71.40.2
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.10.20.20.20.10.10.20.20.30.30.30.40.00.0
Percentage of Assets us-gaap:NoncompeteAgreements0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TradeNames


Finite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value3.7254.1464.5674.2254.7040.4320.6510.9511.251.5711.5791.9332.3282.4362.7963.1553.5153.5823.9091.2771.4231.571.7161.8622.0082.22.4290.1620.24
Percentage of FiniteLivedIntangibleAssetsNet7.88.08.214.815.12.53.54.65.66.58.311.913.318.719.520.020.519.820.127.527.026.624.422.020.020.119.25.17.2
Percentage of Assets0.20.20.30.30.30.00.00.10.20.20.20.50.50.61.01.11.21.11.30.50.50.50.60.60.60.60.80.00.1
Percentage of Assets us-gaap:TradeNames0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value212224141514151614150.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.70.71.10.61.01.01.11.11.01.20.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value24252418252318151515144.5234.2564.3833.7654.4194.2974.6994.4125.5655.2274.1694.4273.8821.9221.7321.8041.82.162.0241.814
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.81.10.81.61.61.31.11.11.21.90.60.61.00.81.01.61.71.51.81.81.51.51.20.70.60.60.50.70.60.6

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value6.211148.5475.8386.421137.3624.1973.1316.3418.1774.2835.3373.9817.0492.1090.8093.2615.1757.9926.264.3075.86113.8324.846106.0639.8133.7424.078
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.50.40.20.40.90.50.30.20.51.10.60.70.91.60.50.31.21.82.52.11.62.03.71.31.63.41.73.11.11.2

Accrued Liabilities Current

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccruedLiabilitiesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value72786179504739523735344629263141274144594619353923203129191921
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.32.42.83.43.33.22.73.62.62.74.56.24.16.27.09.510.414.615.218.715.97.012.112.38.36.59.88.56.46.06.5

us-gaap:AccruedLiabilitiesCurrent us-gaap:Restatement

srt:RevisionOfPriorPeriodReclassificationAdjustment


Accrued
Period End2020-12-31
Value6.6
Percentage of AccruedLiabilitiesCurrent10.7
Percentage of Assets0.3
Percentage of Assets srt:RevisionOfPriorPeriodReclassificationAdjustment0.0

Contract With Customer Liability Current

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:ContractWithCustomerLiabilityCurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value3448325128351827182617
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.51.42.21.82.41.31.91.32.02.3

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value11325110914290101718864725976484951654162649767505697477066108537548
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.67.94.96.15.96.84.86.14.55.67.810.26.711.611.515.015.322.222.130.722.918.319.330.316.522.621.031.017.222.714.7

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value6603000.05652000.05685000.05234000.05283000.04982000.04774000.04640000.00
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.30.20.40.40.40.30.30.40.0

us-gaap:OperatingLeaseLiabilityCurrent us-gaap:Restatement

srt:RevisionOfPriorPeriodReclassificationAdjustment


Operating
Period End2020-12-31
Value-6600000.0
Percentage of OperatingLeaseLiabilityCurrent-100.0
Percentage of Assets-0.3
Percentage of Assets srt:RevisionOfPriorPeriodReclassificationAdjustment0.0

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value171714131323159.915
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.81.21.83.14.88.14.93.0

Taxes Payable Current

us-gaap:TaxesPayableCurrent

us-gaap:TaxesPayableCurrent


Taxes
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value6166000.03046000.03864000.03337000.02927000.03913000.04851000.03067000.0
Percentage of TaxesPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.20.50.71.01.31.50.9

Liabilities Noncurrent

us-gaap:LiabilitiesNoncurrent

us-gaap:LiabilitiesNoncurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value16991699153115539519309189068918082902872834.4434.3055.2434.9744.5424.3834.0754.013.9694.174.2614.7324.2854.3655.3155.1875.1534.979
Percentage of LiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets53.953.268.066.361.862.261.761.963.061.738.238.239.31.01.01.21.91.61.51.31.41.41.41.31.61.41.41.51.61.51.5

Long Term Debt

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

us-gaap:LongTermDebt

chgg:DebtInstrumentLiabilityComponent, chgg:A0ConvertibleSeniorNotesDue2026, us-gaap:SeniorNotes


Long
Period End2020-08-31
Value758
Percentage of LongTermDebt100.0
Percentage of Assets0.0
Percentage of Assets chgg:DebtInstrumentLiabilityComponent chgg:A0ConvertibleSeniorNotesDue2026 us-gaap:SeniorNotes0.0

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

chgg:ExchangeOfAggregatePrincipalAmount, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Long
Period End2020-12-31
Value152
Percentage of LongTermDebt0.0
Percentage of Assets6.8
Percentage of Assets chgg:ExchangeOfAggregatePrincipalAmount chgg:A0.25PercentConvertibleSeniorNotesDue2023 us-gaap:SeniorNotes0.0

chgg:ExtinguishmentOfAggregatePrincipalAmount, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Long
Period End2020-12-31
Value51
Percentage of LongTermDebt0.0
Percentage of Assets2.3
Percentage of Assets chgg:ExtinguishmentOfAggregatePrincipalAmount chgg:A0.25PercentConvertibleSeniorNotesDue2023 us-gaap:SeniorNotes0.0

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

chgg:SettlementOfPrincipalDuringSixMonths, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Long
Period End2021-06-30
Value114
Percentage of LongTermDebt0.0
Percentage of Assets3.6
Percentage of Assets chgg:SettlementOfPrincipalDuringSixMonths chgg:A0.25PercentConvertibleSeniorNotesDue2023 us-gaap:SeniorNotes0.0

chgg:SettlementOfPrincipalDuringThreeMonths, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Long
Period End2021-06-30
Value109
Percentage of LongTermDebt0.0
Percentage of Assets3.5
Percentage of Assets chgg:SettlementOfPrincipalDuringThreeMonths chgg:A0.25PercentConvertibleSeniorNotesDue2023 us-gaap:SeniorNotes0.0

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

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Long
Period End2020-12-312020-08-31
Value115152
Percentage of LongTermDebt0.020.1
Percentage of Assets5.10.0
Percentage of Assets chgg:A0.25PercentConvertibleSeniorNotesDue2023 us-gaap:SeniorNotes0.00.0

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value8.3777.6285.7054.665113.9833.9643.8153.5923.3116.9647.0166.7674.3054.2854.3655.3155.1875.1534.979
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.20.30.20.80.30.30.30.30.30.90.90.91.01.41.41.51.61.51.5

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value151719111213141514150.0
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.50.50.90.50.80.91.01.01.01.20.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value7590000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets0.3

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value5604000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets0.2

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value2559000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets0.1

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value1823000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.1

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value3618000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets0.2

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value2519201920
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0
Percentage of Assets1.21.31.41.31.5

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-312019-12-31
Value2821
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0
Percentage of Assets1.31.5

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value3029000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets0.1

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value13371243609645498462498468459428410388388370391368222214221215221220231220235235247234255251274-86.127-51.894
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets42.538.927.127.632.431.033.532.032.532.754.051.753.987.487.583.882.876.276.468.075.780.279.368.381.876.077.767.481.275.783.80.00.0

us-gaap:StockholdersEquity us-gaap:CumulativeEffectPeriodOfAdoption

srt:CumulativeEffectPeriodOfAdoptionAdjustment


Stockholders
Period End2020-12-312019-12-312018-12-31
Value-0.088-0.088-0.111
Percentage of StockholdersEquity-0.0-0.0-0.0
Percentage of Assets-0.0-0.0-0.0
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment0.00.00.0

us-gaap:StockholdersEquity us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:AdjustmentsForNewAccountingPronouncements

srt:CumulativeEffectPeriodOfAdoptionAdjustment, chgg:AccountingStandardsUpdate202006


Stockholders
Period End2020-12-31
Value-378.138
Percentage of StockholdersEquity-62.0
Percentage of Assets-16.8
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment chgg:AccountingStandardsUpdate2020060.0

us-gaap:StockholdersEquity us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:LongtermDebtType

srt:CumulativeEffectPeriodOfAdoptionAdjustment, chgg:AccountingStandardsUpdate202006, us-gaap:SeniorNotes


Stockholders
Period End2020-12-31
Value378
Percentage of StockholdersEquity62.0
Percentage of Assets16.8
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment chgg:AccountingStandardsUpdate202006 us-gaap:SeniorNotes0.0

us-gaap:StockholdersEquity us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:StatementEquityComponents

srt:CumulativeEffectPeriodOfAdoptionAdjustment, chgg:AccountingStandardsUpdate202006, us-gaap:AdditionalPaidInCapital


Stockholders
Period End2020-12-31
Value-465.006
Percentage of StockholdersEquity-76.3
Percentage of Assets-20.7
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment chgg:AccountingStandardsUpdate202006 us-gaap:AdditionalPaidInCapital0.0

srt:CumulativeEffectPeriodOfAdoptionAdjustment, chgg:AccountingStandardsUpdate202006, us-gaap:RetainedEarnings


Stockholders
Period End2020-12-31
Value-86.868
Percentage of StockholdersEquity-14.2
Percentage of Assets-3.9
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment chgg:AccountingStandardsUpdate202006 us-gaap:RetainedEarnings0.0

us-gaap:StockholdersEquity us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:StatementEquityComponents

srt:CumulativeEffectPeriodOfAdoptionAdjustment, us-gaap:AdditionalPaidInCapital


Stockholders
Period End2020-12-31
Value-465.006
Percentage of StockholdersEquity-76.3
Percentage of Assets-20.7
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment us-gaap:AdditionalPaidInCapital0.0

srt:CumulativeEffectPeriodOfAdoptionAdjustment, us-gaap:RetainedEarnings


Stockholders
Period End2020-12-312019-12-312018-12-31
Value-0.088-0.088-0.111
Percentage of StockholdersEquity-0.0-0.0-0.0
Percentage of Assets-0.0-0.0-0.0
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment us-gaap:RetainedEarnings0.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value-0.97-1.2381.531.3331.85-5.362-1.096-1.758-0.618-0.9-1.019-0.965-0.6610.138-0.282-0.176-0.172-0.013-0.0060.05
Percentage of StockholdersEquity-0.1-0.10.30.20.4-1.2-0.2-0.4-0.1-0.2-0.2-0.2-0.20.0-0.1-0.1-0.1-0.0-0.0-0.1
Percentage of Assets-0.0-0.00.10.10.1-0.4-0.1-0.1-0.0-0.1-0.1-0.1-0.10.0-0.1-0.1-0.1-0.0-0.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value17061645103010929078909168948738398188017877647825935605164796348
Percentage of StockholdersEquity127.6132.3169.0169.3182.2192.3183.6191.0190.0196.2199.2206.2202.6206.5200.2267.3242.5209.2174.8-73.2-93.1
Percentage of Assets54.251.545.846.759.059.561.561.161.764.2107.5106.5109.3180.4175.2204.1192.3162.5146.40.00.0
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


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value0.1450.1410.1290.1290.1240.1240.1220.1210.1190.1180.1160.1150.1140.1130.110.0920.0880.0840.0820.0120.012
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-0.0-0.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value-368.148-400.912-422.601-448.644-411.504-422.093-416.292-424.511-413.034-411.005-406.576-411.923-398.214-394.305-391.611-371.328-329.083-269.873-205.115-149.265-100.222
Percentage of StockholdersEquity-27.5-32.2-69.3-69.5-82.6-91.2-83.5-90.6-89.9-96.0-99.0-106.0-102.4-106.6-100.1-167.3-142.4-109.2-74.8173.3193.1
Percentage of Assets-11.7-12.6-18.8-19.2-26.7-28.2-28.0-29.0-29.2-31.4-53.4-54.8-55.3-93.1-87.6-127.8-112.9-84.8-62.70.00.0
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

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value145000.0141000.0129000.0129000.0124000.0124000.0122000.0121000.0119000.0118000.0116000.0115000.0114000.0113000.0110000.0108000.096000.094000.092000.091000.091000.090000.088000.088000.088000.086000.084000.084000.084000.083000.082000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value1706164510301092907890916894873839818801787764782764605591593584575565560552543533516506494482479
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets54.251.545.846.759.059.561.561.161.764.2107.5106.5109.3180.4175.2173.6225.9210.6204.1185.0196.5205.7192.3171.6189.1172.3162.5145.4157.2145.1146.4

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value-368150000.0-400910000.0-422600000.0-448640000.0-411500000.0-422090000.0-416290000.0-424510000.0-413030000.0-411000000.0-406580000.0-411920000.0-398210000.0-394300000.0-391610000.0-395270000.0-383750000.0-377730000.0-371330000.0-369840000.0-353780000.0-344770000.0-329080000.0-332710000.0-308550000.0-298420000.0-269870000.0-271560000.0-239120000.0-230870000.0-205120000.0
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-11.7-12.6-18.8-19.2-26.7-28.2-28.0-29.0-29.2-31.4-53.4-54.8-55.3-93.1-87.6-89.8-143.1-134.4-127.8-117.0-120.8-125.5-112.9-103.3-107.3-96.3-84.8-78.0-76.0-69.4-62.7

us-gaap:RetainedEarningsAccumulatedDeficit us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:SubsequentEventType

srt:CumulativeEffectPeriodOfAdoptionAdjustment, chgg:AccountingStandardsUpdate202006, us-gaap:SubsequentEvent


Retained
Period End2021-01-01
Value-107000000.0
Percentage of RetainedEarningsAccumulatedDeficit0.0
Percentage of Assets0.0
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment chgg:AccountingStandardsUpdate202006 us-gaap:SubsequentEvent0.0

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value-970000.0-1238000.01530000.01333000.01850000.0-5362000.0-1096000.0-1758000.0-618000.0-900000.0-1019000.0-965000.0-661000.0138000.0-282000.019000.076000.0-77000.0-176000.0-148000.0-183000.0-104000.0-172000.0-89000.014000.031000.0-13000.0-1000.028000.01000.0-6000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.0-0.00.10.10.1-0.4-0.1-0.1-0.0-0.1-0.1-0.1-0.10.0-0.10.00.0-0.0-0.1-0.0-0.1-0.0-0.1-0.00.00.0-0.0-0.00.00.0-0.0

Stock Issued During Period Value New Issues

us-gaap:StockIssuedDuringPeriodValueNewIssues

us-gaap:StockIssuedDuringPeriodValueNewIssues


Stock
Period End2021-06-302021-03-31
Value0.01091
Percentage of StockIssuedDuringPeriodValueNewIssues0.0100.0
Percentage of Assets0.00.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-31
Value0.01091
Percentage of StockIssuedDuringPeriodValueNewIssues0.0100.0
Percentage of Assets0.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.0

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-31
Value0.00.011
Percentage of StockIssuedDuringPeriodValueNewIssues0.00.0
Percentage of Assets0.00.0
Percentage of Assets us-gaap:CommonStock0.00.0

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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2923242119181716151514131211
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2923242119181716151514131211
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-06-302014-03-312013-06-302013-03-31
Value707367465962263829173021166.5532113150.835-5.7883712-19.233-18.19631-6.54429-7.09429
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax35.737.133.030.238.747.921.441.131.918.431.828.522.98.529.521.227.21.3-9.253.122.8-28.9-26.738.3-10.139.2-12.748.5

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-06-302014-03-312013-06-302013-03-31
Value190-764.95218-572.46-131.22-47.262-93.041-145.635-477.92213-36.455-26.915-23.4154.236-25.329-105.341-7.5491.985-6.3643.498-3.1360.0393.80614-3.633-63.201-3.627-20.726
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax95.8-385.68.8-371.7-85.8-35.9-74.1-154.7-509.213.5-38.1-36.3-31.55.5-34.5-168.2-13.43.2-10.14.9-5.90.15.618.0-5.6-85.0-6.5-34.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-06-302014-03-312013-06-302013-03-31
Value-77.256867-133.818768-1.896-44.1693.8821.69895082.2330.075284-30.4187.858148-11.98-9.855-0.732-0.813-0.799-6.3310.4780.0511.52-3.3652.0660.411
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-38.9437.3-65.0499.0-1.2-33.63.11.895.3522.02.30.1383.3-39.510.7236.6-21.3-15.7-1.2-1.1-1.5-9.50.70.12.4-4.53.70.7

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value183176242-73.878-28.464-105.216-358.562539-5.688278-19.62956-4.209-6.676
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax92.688.8157.4-48.3-21.6-111.8-382.0553.9-7.7374.7-25.589.6-7.5-10.7

Amortization Of Financing Costs

us-gaap:AmortizationOfFinancingCosts us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:AmortizationOfFinancingCosts

chgg:A0.125PercentConvertibleSeniorNotesDue2025, us-gaap:SeniorNotes


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value740000.0808000.0614000.0614000.0607000.0608000.0614000.0614000.0613000.035000.0
Percentage of AmortizationOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value74000.0168000.0165000.0292000.0371000.0372000.0376000.0375000.0368000.0369000.0376000.0377000.0364000.0369000.0
Percentage of AmortizationOfFinancingCosts10.020.826.947.661.161.261.261.160.01054.30.00.00.00.0

chgg:A0ConvertibleSeniorNotesDue2026, us-gaap:SeniorNotes


Amortization
Period End2021-06-302021-03-312020-12-312020-09-30
Value657000.0650000.0503000.0225000.0
Percentage of AmortizationOfFinancingCosts88.880.481.936.6

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-30
Value-92000.0221000.073000.0-311000.0-98000.020000.039000.00535000.00282000.00
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.00.0

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-9736000.06597000.02753000.0-1060000.0-138000.0-436000.01588000.01434000.0-3581000.0-1836000.03894000.0-1289000.01356000.0-3068000.04940000.01300000.0-2452000.0-1139000.0-3441000.01697000.02625000.0-1609000.0-6213000.08127000.0-1212000.0-4938000.05356000.0-3307000.03774000.0-786000.0-2635000.05604000.00-2999000.0
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-1222000.0-2240000.0506000.03855000.0968000.0-4929000.0-2679000.07794000.0-2920000.0-4024000.03947000.0200000.0191000.0-2800000.0961000.01203000.0-42000.0-1947000.0439000.02295000.0-446000.0-2161000.0-1111000.0515000.02318000.0-2434000.0-1924000.01422000.0-16000.02227000.0-908000.0149000.01445000.0788000.0
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-06-302014-03-312013-06-302013-03-31
Value707367465962263829173021166.5532113150.835-5.7883712-19.233-18.19631-6.54429-7.09429
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax35.737.133.030.238.747.921.441.131.918.431.828.522.98.529.521.227.21.3-9.253.122.8-28.9-26.738.3-10.139.2-12.748.5

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value32-65.17926-37.1410-5.7138.219-11.477-2.029-4.3185.347-13.709-3.909-2.6173.659-11.516-6.025-6.401-1.489-16.063-9.008-15.6853.63-24.167-10.131-28.5421.688-32.441-8.246-25.759-5.417-29.255-3.353-17.825
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.5-32.912.7-24.16.9-4.36.5-12.2-2.2-4.45.6-18.5-5.3-3.45.0-18.4-10.7-10.2-2.4-22.5-17.0-23.55.3-29.7-15.1-33.62.0-39.8-12.8-34.6-7.0-47.5-6.0-29.2

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value32-65.17926-37.1410-5.7138.219-11.477-2.029-4.3185.347-13.709-3.909-2.617
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.5-32.912.7-24.16.9-4.36.5-12.2-2.2-4.45.6-18.5-5.3-3.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value282324211918171615151413121110109.0998.2789.0841011116.9918.9337.831159.683118.4816.93253.8573.8814.15
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-06-302014-03-312013-06-302013-03-31
Value190-764.95218-572.46-131.22-47.262-93.041-145.635-477.92213-36.455-26.915-23.4154.236-25.329-105.341-7.5491.985-6.3643.498-3.1360.0393.80614-3.633-63.201-3.627-20.726
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax95.8-385.68.8-371.7-85.8-35.9-74.1-154.7-509.213.5-38.1-36.3-31.55.5-34.5-168.2-13.43.2-10.14.9-5.90.15.618.0-5.6-85.0-6.5-34.0

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value271823142319108.0299.43114137.9615.2044.8836.2127.4237.7374.776.8553.6179.4174.82.3691.7382.661.4861.2761.3111.2111.2852.1652.0161.6441.544
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-06-302014-03-312013-06-302013-03-31
Value-77.256867-133.818768-1.896-44.1693.8821.69895082.2330.075284-30.4187.858148-11.98-9.855-0.732-0.813-0.799-6.3310.4780.0511.52-3.3652.0660.411
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-38.9437.3-65.0499.0-1.2-33.63.11.895.3522.02.30.1383.3-39.510.7236.6-21.3-15.7-1.2-1.1-1.5-9.50.70.12.4-4.53.70.7

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value7.868.649.48.978.68.688.718.748.648.537.428.538.458.35
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value1510000.01620000.01659000.01439000.01157000.0703000.0265000.0
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value60344.2841.430.2560.1590.0560.037
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value14108.7715.7724.8824.8494.2722.9941.9420.565
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value15114812591110987958
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0

chgg:AdjustmentsToAdditionalPaidInCapitalProceedsFromCappedCall

chgg:AdjustmentsToAdditionalPaidInCapitalProceedsFromCappedCall


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-30
Value44231957
Percentage of AdjustmentsToAdditionalPaidInCapitalProceedsFromCappedCall100.0100.0100.0100.0

chgg:AdjustmentsToAdditionalPaidInCapitalProceedsFromCappedCall us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-30
Value44231957
Percentage of AdjustmentsToAdditionalPaidInCapitalProceedsFromCappedCall100.0100.0100.0100.0

chgg:AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCall

chgg:AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCall


Adjustments
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.01030.00.012850.00.039
Percentage of AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCall0.0100.00.00.0100.0100.00.00.0100.0

chgg:AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCall us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.01030.00.012850.00.039
Percentage of AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCall0.0100.00.00.0100.0100.00.00.0100.0

chgg:ContractWithCustomerLiabilityRevenueRecognizedPriorPeriod

chgg:ContractWithCustomerLiabilityRevenueRecognizedPriorPeriod


Contract
Period End2021-06-302019-12-312019-09-302019-06-30
Value2900000.0700000.02200000.0700000.0
Percentage of ContractWithCustomerLiabilityRevenueRecognizedPriorPeriod100.0100.0100.0100.0

chgg:DebtConversionRequestedAmount us-gaap:DebtInstrument, us-gaap:SubsequentEventType

chgg:DebtConversionRequestedAmount

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SubsequentEvent


Debt
Period End2021-02-22
Value24
Percentage of DebtConversionRequestedAmount100.0

chgg:DebtInstrumentConsiderationTransferred chgg:DebtInstrumentTransactionPeriod, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:DebtInstrumentConsiderationTransferred

chgg:SettlementOfPrincipalDuringThreeMonths, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2021-06-30
Value335
Percentage of DebtInstrumentConsiderationTransferred100.0

chgg:DebtInstrumentConsiderationTransferredEquityInterestsIssuedAndIssuable chgg:DebtInstrumentTransaction, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:DebtInstrumentConsiderationTransferredEquityInterestsIssuedAndIssuable

chgg:ExchangeOfAggregatePrincipalAmount, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2021-06-302021-03-31
Value0.0327
Percentage of DebtInstrumentConsiderationTransferredEquityInterestsIssuedAndIssuable0.0100.0

chgg:DebtInstrumentConsiderationTransferredEquityInterestsIssuedAndIssuable chgg:DebtInstrumentTransactionPeriod, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:SettlementOfPrincipalDuringThreeMonths, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2021-06-30
Value224
Percentage of DebtInstrumentConsiderationTransferredEquityInterestsIssuedAndIssuable0.0

chgg:DebtInstrumentConsiderationTransferredEquityInterestsIssuedAndIssuable us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2020-08-31
Value327
Percentage of DebtInstrumentConsiderationTransferredEquityInterestsIssuedAndIssuable0.0

chgg:DebtInstrumentConvertibleIfConvertedValueLessThanPrincipal us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:DebtInstrumentConvertibleIfConvertedValueLessThanPrincipal

chgg:A0ConvertibleSeniorNotesDue2026, us-gaap:SeniorNotes


Debt
Period End2020-12-31
Value-175.7
Percentage of DebtInstrumentConvertibleIfConvertedValueLessThanPrincipal100.0

chgg:DebtInstrumentDebtConversionConsideration us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:DebtInstrumentDebtConversionConsideration

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2021-03-31
Value15
Percentage of DebtInstrumentDebtConversionConsideration100.0

chgg:DebtInstrumentDebtConversionConsideration us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes, us-gaap:SubsequentEvent


Debt
Period End2021-04-30
Value67
Percentage of DebtInstrumentDebtConversionConsideration0.0

chgg:DebtInstrumentDebtConversionEquityInstrumentsIssuedAmount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:DebtInstrumentDebtConversionEquityInstrumentsIssuedAmount

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2021-03-31
Value11
Percentage of DebtInstrumentDebtConversionEquityInstrumentsIssuedAmount100.0

chgg:DebtInstrumentDebtConversionEquityInstrumentsIssuedAmount us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes, us-gaap:SubsequentEvent


Debt
Period End2021-04-30
Value47
Percentage of DebtInstrumentDebtConversionEquityInstrumentsIssuedAmount0.0

chgg:DebtInstrumentPrincipalAmountExchangedConsiderationTransferred chgg:DebtInstrumentTransaction, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:DebtInstrumentPrincipalAmountExchangedConsiderationTransferred

chgg:ExchangeOfAggregatePrincipalAmount, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2021-06-302021-03-31
Value0.0501
Percentage of DebtInstrumentPrincipalAmountExchangedConsiderationTransferred0.0100.0

chgg:DebtInstrumentPrincipalAmountExchangedConsiderationTransferred us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2020-08-31
Value501
Percentage of DebtInstrumentPrincipalAmountExchangedConsiderationTransferred0.0

chgg:DepreciationTextbookLibrary

chgg:DepreciationTextbookLibrary


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value2.8213.764.6983.6373.5353.5270.00.00.00.00.00.00.3641.6832.7244.4966.7159.362121415161820
Percentage of DepreciationTextbookLibrary100.0100.0100.0100.0100.0100.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

chgg:DepreciationTextbookLibrary us-gaap:ProductOrService

chgg:TextbookLibrary


Depreciation
Period End2020-12-312020-09-302020-06-30
Value4.73.63.6
Percentage of DepreciationTextbookLibrary100.099.0101.8

chgg:FiniteLivedAndIndefiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss

chgg:FiniteLivedAndIndefiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss


Finite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value266000.0272000.0127000.0-523000.0173000.0-262000.0-10000.0-299000.0-86000.0-42000.0-315000.0172000.0
Percentage of FiniteLivedAndIndefiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

chgg:IncreaseDecreaseInAccountsReceivableNet

chgg:IncreaseDecreaseInAccountsReceivableNet


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-1542000.0-1280000.0426000.03653000.02341000.0-5036000.0-2149000.07730000.0
Percentage of IncreaseDecreaseInAccountsReceivableNet100.0100.0100.0100.0100.0100.0100.0100.0

chgg:IncreaseDecreaseInContractWithCustomerAssets

chgg:IncreaseDecreaseInContractWithCustomerAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-1645000.04800000.05029000.03472000.0260000.0951000.0
Percentage of IncreaseDecreaseInContractWithCustomerAssets100.0100.0100.0100.0100.0100.0

chgg:IncreaseDecreaseInContractWithCustomerAssetsPercent

chgg:IncreaseDecreaseInContractWithCustomerAssetsPercent


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-12.036.0142.0132.660.070.27
Percentage of IncreaseDecreaseInContractWithCustomerAssetsPercent100.0100.0100.0100.0100.0100.0

chgg:IncreaseDecreaseinAccountsReceivablePercent

chgg:IncreaseDecreaseinAccountsReceivablePercent


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-12.0-10.04.08.230.21-0.44-0.160.6
Percentage of IncreaseDecreaseinAccountsReceivablePercent100.0100.0100.0100.0100.0100.0100.0100.0

chgg:IncreaseDecreaseinContractwithCustomerLiabilityPercent

chgg:IncreaseDecreaseinContractwithCustomerLiabilityPercent


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value-43.049.0-103.0176.49-0.390.9-0.5
Percentage of IncreaseDecreaseinContractwithCustomerLiabilityPercent100.0100.0100.0100.0100.0100.0100.0

chgg:OtherIncomeExpense

chgg:OtherIncomeExpense


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value69000.0705000.047000.0104000.0
Percentage of OtherIncomeExpense100.0100.0100.0100.0

chgg:PaymentToPurchasesTextbooks

chgg:PaymentToPurchasesTextbooks


Payment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0.4914.5278.926101.838360.00.0
Percentage of PaymentToPurchasesTextbooks100.0100.0100.0100.0100.0100.00.00.0

chgg:PaymentsForConvertibleSeniorNotesCappedCall

chgg:PaymentsForConvertibleSeniorNotesCappedCall


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.01030.00.00.00.012850.00.0390.00.00.0
Percentage of PaymentsForConvertibleSeniorNotesCappedCall0.0100.00.00.00.00.0100.0100.00.00.0100.00.00.00.0

chgg:PaymentsForInitialPurchasersDiscount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:PaymentsForInitialPurchasersDiscount

chgg:A0ConvertibleSeniorNotesDue2026, us-gaap:SeniorNotes


Payments
Period End2020-08-31
Value15
Percentage of PaymentsForInitialPurchasersDiscount100.0

chgg:ProceedsFromCappedCall chgg:DebtInstrumentTransaction, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:ProceedsFromCappedCall

chgg:CappedCall, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Proceeds
Period End2021-03-31
Value900000.0
Percentage of ProceedsFromCappedCall100.0

chgg:ProceedsFromDispositionOfTextbooks

chgg:ProceedsFromDispositionOfTextbooks


Proceeds
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value2671000.04038000.03597000.01245000.02170000.000
Percentage of ProceedsFromDispositionOfTextbooks100.0100.0100.0100.0100.00.00.0

chgg:ProceedsFromIssuanceOfEmployeeStockPurchasePlan

chgg:ProceedsFromIssuanceOfEmployeeStockPurchasePlan


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value4.920.3476.2471.1975.3722.6677.37710106.9825.6535.413125.222103.87.0022.7630.990.0041.110.01.10811-5.2276.6260.7110.258
Percentage of ProceedsFromIssuanceOfEmployeeStockPurchasePlan100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

chgg:RepaymentsOfConvertibleSeniorNotesAttributableToDebtDiscount

chgg:RepaymentsOfConvertibleSeniorNotesAttributableToDebtDiscount


Repayments
Period End2020-12-31
Value5.521
Percentage of RepaymentsOfConvertibleSeniorNotesAttributableToDebtDiscount100.0

chgg:RevenuefromContractwithCustomerIncludingAssessedTaxIncreaseDecrease

chgg:RevenuefromContractwithCustomerIncludingAssessedTaxIncreaseDecrease


Revenuefrom
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4566805959342919192022111714
Percentage of RevenuefromContractwithCustomerIncludingAssessedTaxIncreaseDecrease100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

chgg:RevenuefromContractwithCustomerIncludingAssessedTaxIncreaseDecrease us-gaap:ProductOrService

chgg:CheggServices


Revenuefrom
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4761684945252515181921141715
Percentage of RevenuefromContractwithCustomerIncludingAssessedTaxIncreaseDecrease104.592.885.682.877.373.386.075.894.092.995.6127.095.8106.2

chgg:RequiredMaterials


Revenuefrom
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-2.044.7961110139.1144.1684.8111.1821.4450.984-3.1290.756-0.895
Percentage of RevenuefromContractwithCustomerIncludingAssessedTaxIncreaseDecrease-4.57.214.417.222.726.714.024.26.07.14.4-27.04.2-6.2

chgg:RevenuefromContractwithCustomerIncludingAssessedTaxIncreaseDecreasePercent

chgg:RevenuefromContractwithCustomerIncludingAssessedTaxIncreaseDecreasePercent


Revenuefrom
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value30.051.03.064.00.630.350.010.270.260.270.020.190.320.23
Percentage of RevenuefromContractwithCustomerIncludingAssessedTaxIncreaseDecreasePercent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

chgg:RevenuefromContractwithCustomerIncludingAssessedTaxIncreaseDecreasePercent us-gaap:ProductOrService

chgg:CheggServices


Revenuefrom
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value38.062.03.072.00.570.3300.280.30.34-0.010.370.380.37
Percentage of RevenuefromContractwithCustomerIncludingAssessedTaxIncreaseDecreasePercent126.7121.6100.0112.590.594.30.0103.7115.4125.9-50.0194.7118.8160.9

chgg:RequiredMaterials


Revenuefrom
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-8.015.02.041.00.990.410.030.240.10.070.03-0.140.07-0.04
Percentage of RevenuefromContractwithCustomerIncludingAssessedTaxIncreaseDecreasePercent-26.729.466.764.1157.1117.1300.088.938.525.9150.0-73.721.9-17.4

chgg:SaleOfStockOfferingExpenses us-gaap:SubsidiarySaleOfStock

chgg:SaleOfStockOfferingExpenses

chgg:PublicOffering


Sale
Period End2021-02-28
Value1100000.0
Percentage of SaleOfStockOfferingExpenses100.0

chgg:SaleOfStockUnderwritingDiscountsAndCommissions us-gaap:SubsidiarySaleOfStock

chgg:SaleOfStockUnderwritingDiscountsAndCommissions

chgg:PublicOffering


Sale
Period End2021-02-28
Value26
Percentage of SaleOfStockUnderwritingDiscountsAndCommissions100.0

chgg:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlanandStockOptionsExercised us-gaap:StatementEquityComponents

chgg:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlanandStockOptionsExercised

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value120000.044000.0376000.0106000.0312000.0360000.0731000.0991000.0845000.0709000.0660000.0765000.01406000.0628000.0
Percentage of StockIssuedDuringPeriodSharesEmployeeStockPurchasePlanandStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

chgg:StockIssuedDuringPeriodValueEmployeeStockPurchasePlanandStockOptionsExercised

chgg:StockIssuedDuringPeriodValueEmployeeStockPurchasePlanandStockOptionsExercised


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4.9190.3466.2471.1975.3722.6657.37711105.825.6525.413125.219
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlanandStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

chgg:StockIssuedDuringPeriodValueEmployeeStockPurchasePlanandStockOptionsExercised us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4.9190.3466.2471.1965.3722.6657.37611105.8195.6515.412125.218
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlanandStockOptionsExercised100.0100.0100.099.9100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStock


Stock
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.00.0010.00.0010.0010.0010.0010.0010.0010.0020.001
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlanandStockOptionsExercised0.00.10.00.00.00.00.00.00.00.00.0

chgg:StockIssuedRepaymentForConvertibleSeniorNotes

chgg:StockIssuedRepaymentForConvertibleSeniorNotes


Stock
Period End2021-06-302021-03-31
Value22411
Percentage of StockIssuedRepaymentForConvertibleSeniorNotes100.0100.0

chgg:TextbookLibraryGainLossNet

chgg:TextbookLibraryGainLossNet


Textbook
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value-202000.0-4028000.0657000.0196000.01175000.000
Percentage of TextbookLibraryGainLossNet100.0100.0100.0100.0100.00.00.0

chgg:TextbookLibraryGainLossNet us-gaap:ProductOrService

chgg:TextbookLibrary


Textbook
Period End2020-09-302020-06-302020-03-31
Value600000.0200000.01200000.0
Percentage of TextbookLibraryGainLossNet91.3102.0102.1

us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt

us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-225.615-11.3050.02370.00.0251800.00.062
Percentage of AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt100.0100.00.0100.00.00.0100.0100.00.00.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt chgg:DebtInstrumentTransactionPeriod, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:SettlementOfPrincipalDuringThreeMonths, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Adjustments
Period End2021-06-30
Value225
Percentage of AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt-100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-225.615-11.3050.02370.00.0251800.00.062
Percentage of AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt100.0100.00.0100.00.00.0100.0100.00.00.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebtSubsequentAdjustments

us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebtSubsequentAdjustments


Adjustments
Period End2020-12-312020-09-30
Value97345
Percentage of AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebtSubsequentAdjustments100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebtSubsequentAdjustments us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2020-12-312020-09-30
Value97345
Percentage of AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebtSubsequentAdjustments100.0100.0

us-gaap:AmortizationOfDebtDiscountPremium us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:AmortizationOfDebtDiscountPremium

chgg:A0.125PercentConvertibleSeniorNotesDue2025, us-gaap:SeniorNotes


Amortization
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value8.948.9388.8428.8418.9398.9398.9140.51
Percentage of AmortizationOfDebtDiscountPremium100.0100.0100.0100.0100.0100.0100.0100.0

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Amortization
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1.3642.4583.1263.1253.1593.1613.1253.0913.163.163.0573.091
Percentage of AmortizationOfDebtDiscountPremium15.327.535.435.335.335.435.1606.10.00.00.00.0

chgg:A0ConvertibleSeniorNotesDue2026, us-gaap:SeniorNotes


Amortization
Period End2020-12-312020-09-30
Value104.491
Percentage of AmortizationOfDebtDiscountPremium112.750.2

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AmortizationOfFinancingCostsAndDiscounts


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1.4711.626211712121313134.0053.5363.5373.4210.00.00.00.0350.0350.0350.0350.0880.0290.0290.7350.390.391
Percentage of AmortizationOfFinancingCostsAndDiscounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessAcquisitionsProFormaNetIncomeLoss us-gaap:BusinessAcquisition

us-gaap:BusinessAcquisitionsProFormaNetIncomeLoss

chgg:MathwayLLC


Business
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value26-37.3125.9999999999999964-14.1-12.6
Percentage of BusinessAcquisitionsProFormaNetIncomeLoss100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationAcquisitionRelatedCosts us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationAcquisitionRelatedCosts

chgg:MathwayLLC


Business
Period End2020-12-31
Value0
Percentage of BusinessCombinationAcquisitionRelatedCosts0.0

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:ContractWithCustomerLiabilityRevenueRecognized


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value44290.32533171.01519120.0100.0
Percentage of ContractWithCustomerLiabilityRevenueRecognized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0

us-gaap:DebtConversionConvertedInstrumentAmount1 us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtConversionConvertedInstrumentAmount1

chgg:A0.125PercentConvertibleSeniorNotesDue2025, us-gaap:SeniorNotes


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312018-06-30
Value29364488555123517
Percentage of DebtConversionConvertedInstrumentAmount1100.0100.0100.0100.0100.0100.0

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312018-06-30
Value-71.2-402.4403458101488
Percentage of DebtConversionConvertedInstrumentAmount1-24.3-620.082.582.582.594.3

chgg:A0ConvertibleSeniorNotesDue2026, us-gaap:SeniorNotes


Debt
Period End2020-12-31
Value175
Percentage of DebtConversionConvertedInstrumentAmount159.9

us-gaap:DebtConversionOriginalDebtAmount1 us-gaap:DebtInstrument

us-gaap:DebtConversionOriginalDebtAmount1

chgg:A0.25PercentConvertibleSeniorNotesDue2023


Debt
Period End2021-03-31
Value24
Percentage of DebtConversionOriginalDebtAmount1100.0

us-gaap:DebtConversionOriginalDebtAmount1 us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2021-03-31
Value4.7
Percentage of DebtConversionOriginalDebtAmount119.0

us-gaap:DebtConversionOriginalDebtAmount1 us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes, us-gaap:SubsequentEvent


Debt
Period End2021-04-30
Value20
Percentage of DebtConversionOriginalDebtAmount10.0

us-gaap:DebtInstrumentConvertibleConversionRatio1 us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentConvertibleConversionRatio1

chgg:A0ConvertibleSeniorNotesDue2026, us-gaap:SeniorNotes


Debt
Period End2020-08-31
Value0.0092978
Percentage of DebtInstrumentConvertibleConversionRatio1100.0

us-gaap:DebtInstrumentConvertibleIfConvertedValueInExcessOfPrincipal us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentConvertibleIfConvertedValueInExcessOfPrincipal

chgg:A0.125PercentConvertibleSeniorNotesDue2025, us-gaap:SeniorNotes


Debt
Period End2020-12-31
Value293
Percentage of DebtInstrumentConvertibleIfConvertedValueInExcessOfPrincipal100.0

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2020-12-31
Value-13.8
Percentage of DebtInstrumentConvertibleIfConvertedValueInExcessOfPrincipal-4.7

us-gaap:DerivativeGainLossOnDerivativeNet

us-gaap:DerivativeGainLossOnDerivativeNet


Derivative
Period End2021-06-302021-03-31
Value0-7148000.0
Percentage of DerivativeGainLossOnDerivativeNet0.0100.0

us-gaap:DilutiveSecuritiesEffectOnBasicEarningsPerShareOther

us-gaap:DilutiveSecuritiesEffectOnBasicEarningsPerShareOther


Dilutive
Period End2021-06-30
Value1212000.0
Percentage of DilutiveSecuritiesEffectOnBasicEarningsPerShareOther100.0

us-gaap:EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount

us-gaap:EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount


Employee
Period End2021-06-302021-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-30
Value700000.0500000.000000000000000000000
Percentage of EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment

us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment


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

us-gaap:EquityMethodInvestmentRealizedGainLossOnDisposal

us-gaap:EquityMethodInvestmentRealizedGainLossOnDisposal


Equity
Period End2021-06-302021-03-31
Value05338000.0
Percentage of EquityMethodInvestmentRealizedGainLossOnDisposal0.0100.0

us-gaap:EquityMethodInvestmentRealizedGainLossOnDisposal us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

chgg:ForeignEntity


Equity
Period End2021-03-31
Value5300000.0
Percentage of EquityMethodInvestmentRealizedGainLossOnDisposal99.3

us-gaap:EquityMethodInvestmentSoldCarryingAmount us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentSoldCarryingAmount

chgg:ForeignEntity


Equity
Period End2021-03-31
Value8300000.0
Percentage of EquityMethodInvestmentSoldCarryingAmount100.0

us-gaap:GainLossOnSaleOfDerivatives chgg:DebtInstrumentTransaction, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:GainLossOnSaleOfDerivatives

chgg:CappedCall, chgg:A0.125PercentConvertibleSeniorNotesDue2025, us-gaap:SeniorNotes


Gain
Period End2021-06-302021-03-31
Value01300000.0
Percentage of GainLossOnSaleOfDerivatives0.0100.0

us-gaap:GainLossOnSaleOfDerivatives us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:A0.125PercentConvertibleSeniorNotesDue2025, us-gaap:SeniorNotes


Gain
Period End2021-06-302021-03-31
Value0-8400000.0
Percentage of GainLossOnSaleOfDerivatives0.0-646.2

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:GainLossOnSaleOfPropertyPlantEquipment


Gain
Period End2021-06-302021-03-312020-09-302019-09-302018-12-312017-12-312016-12-312015-06-302015-03-312014-06-302014-03-31
Value-285000.0-757000.0-206000.0-832000.0-64000.000-716000.0-202000.000
Percentage of GainLossOnSaleOfPropertyPlantEquipment100.0100.0100.0100.0100.00.00.0100.0100.00.00.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss

us-gaap:GoodwillForeignCurrencyTranslationGainLoss


Goodwill
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value405000.0415000.0192000.0-190000.0264000.0-398000.0-15000.0-43000.0-131000.0-63000.0-480000.0253000.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillPurchaseAccountingAdjustments

us-gaap:GoodwillPurchaseAccountingAdjustments


Goodwill
Period End2020-12-31
Value0
Percentage of GoodwillPurchaseAccountingAdjustments0.0

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-5.1899.386-11.832161.41715-18.301152.1810.216-12.206181.608-4.286-10.793114.924-3.743-15.496129.818-16.76-5.073152.696-8.272.6227.629-1.705-1.098-3.5143.7180.623-0.056
Percentage of IncreaseDecreaseInAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInContractWithCustomerLiability


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-13.92615-19.32123-7.43316
Percentage of IncreaseDecreaseInContractWithCustomerLiability100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDeferredRevenue

us-gaap:IncreaseDecreaseInDeferredRevenue


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-13.92615-19.32124-8.85616-11.7218.636-7.4558.858-7.86311-4.9155.185-8.4669.449-5.6493.27-15.16815-12.44811-31.1126-25.21720-47.87148-28.07129-49.34348-25.06628
Percentage of IncreaseDecreaseInDeferredRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-6162000.0-1058000.01576000.01926000.0-713000.01425000.03483000.0345000.0-3500000.01166000.0-635000.087000.0-6000.0506000.0-654000.0122000.0-402000.0287000.0-1153000.0-682000.0656000.0-258000.0388000.0-49000.0300000.0-47000.08000.0-323000.0229000.0241000.0-4296000.01524000.02565000.0-2000.0
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-1080000.0-1197000.0-1863000.0-1142000.0296000.0-1242000.0-618000.01274000.0-919000.0-3148000.0950000.0335000.01116000.0138000.0-1108000.0265000.0598000.0260000.0281000.0101000.0-28000.0-165000.0-152000.0-583000.0447000.0-58000.0-886000.0116000.0-199000.071000.067000.0-194000.047000.0193000.0
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidExpensesOther

us-gaap:IncreaseDecreaseInPrepaidExpensesOther


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-10.3625-11.5974.366-7.8959.707-7.8117.7991.4211-19.32917-1.1217.894-17.84313-10.3131.241-14.751-6.196-5.90816-4.62515115.598-5.3756.582-0.1281.9020.5050.125-0.8091.84
Percentage of IncreaseDecreaseInPrepaidExpensesOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToConversionOfDebtSecurities

us-gaap:IncrementalCommonSharesAttributableToConversionOfDebtSecurities


Incremental
Period End2021-06-302020-06-302019-06-30
Value226.3440.0
Percentage of IncrementalCommonSharesAttributableToConversionOfDebtSecurities100.0100.00.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

chgg:RSUsAndPSUs


Incremental
Period End2021-06-302020-06-302019-06-30
Value1791000.02707000.00
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.00.0

us-gaap:StockOption


Incremental
Period End2021-06-302020-06-302019-06-30
Value504000.0958000.00
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements28.135.40.0

us-gaap:InterestExpenseDebtExcludingAmortization us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:InterestExpenseDebtExcludingAmortization

chgg:A0.125PercentConvertibleSeniorNotesDue2025, us-gaap:SeniorNotes


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value218000.0237000.0251000.0252000.0249000.0249000.0252000.0252000.0251000.014000.0
Percentage of InterestExpenseDebtExcludingAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value12000.066000.092000.0169000.0215000.0215000.0217000.0217000.0215000.0213000.0217000.0218000.0210000.0213000.0
Percentage of InterestExpenseDebtExcludingAmortization5.527.836.767.186.386.386.186.185.71521.40.00.00.00.0

us-gaap:LossContingencyNumberOfPlaintiffs us-gaap:LitigationCase, us-gaap:LitigationStatus, us-gaap:SubsequentEventType

us-gaap:LossContingencyNumberOfPlaintiffs

chgg:A2018DataIncidentArbitrationDemands, us-gaap:PendingLitigation, us-gaap:SubsequentEvent


Loss
Period End2020-07-01
Value1007.0
Percentage of LossContingencyNumberOfPlaintiffs100.0

us-gaap:NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1

us-gaap:NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1


Noncash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1.4370.904-4.5145.348-7.2668.025.584-0.7180.0435.127-1.783-2.3442.1333.204-0.1392.568-0.8782.0220.8160.324-1.1172.310.772-2.8061.0462.759-1.6041.2082.8672.661-4.3613.638-0.4624.4
Percentage of NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseCost


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1475000.01589000.01501000.01215000.01132000.01053000.01101000.01116000.01119000.01049000.00000
Percentage of OperatingLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:OperatingLeaseLeaseIncome us-gaap:ProductOrService

us-gaap:OperatingLeaseLeaseIncome

chgg:TextbookLibrary


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value10.01050121112
Percentage of OperatingLeaseLeaseIncome100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2032000.01998000.01616000.01824000.01778000.01572000.01450000.01522000.01199000.01126000.00000
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value375000.0-1894000.0-885000.0-1642000.06831000.0-3267000.0289000.0-73000.0333000.0119000.010000.043000.0114000.0-91000.0-139000.0-48000.00000-8000.033000.0-29000.016000.0-17000.022000.0-18000.0-18000.054000.0-16000.0
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-30
Value268000.0-2768000.0197000.0-517000.07212000.0-4266000.0662000.0-1140000.0282000.0119000.0-54000.0-304000.0-799000.0420000.0-301000.0-57000.0153000.0-28000.035000.0-79000.0
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value268000.0-2768000.0197000.0-517000.07212000.0-4266000.0662000.0-1140000.0282000.0119000.0-54000.0-304000.0-799000.0420000.0
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherDepreciationAndAmortization

us-gaap:OtherDepreciationAndAmortization


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value15141313109.2438.8787.4357.1496.7856.1745.9665.4485.2175.0365.2084.7044.3894.5193.9333.4912.5772.3312.7673.2413.1723.3363.2792.5092.0351.9982.4522.7042.924
Percentage of OtherDepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoncashIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value-211000.0-87000.033000.0-104000.0188000.01000.046000.0255000.071000.044000.0-14000.064000.0-156000.041000.0-6000.0-117000.09000.046000.059000.0-124000.041000.0-23000.0-71000.0-706000.0-13000.0
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:PaymentsOfDebtIssuanceCosts

chgg:A0ConvertibleSeniorNotesDue2026, us-gaap:SeniorNotes


Payments
Period End2020-08-31
Value904000.0
Percentage of PaymentsOfDebtIssuanceCosts100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value155915117.268463.4958.8256.207763.425.3554.674352.2133.0522.232121.7220.8171.9096.3310.630.6083.0814.3910.2060.1860.1343.454
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireBusinessesGross us-gaap:BusinessAcquisition

us-gaap:PaymentsToAcquireBusinessesGross

chgg:TechnologyCompany


Payments
Period End2021-02-22
Value8.0
Percentage of PaymentsToAcquireBusinessesGross100.0

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired


Payments
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.07.8910.00.0790.00.020140.0140.0-0.1880.1881.1910.7250.00.00.00.00.010.00.0430.5
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired0.0100.00.00.0100.00.00.0100.0100.00.0100.00.0100.0100.0100.0100.0100.00.00.00.00.00.0100.00.0100.0100.0

us-gaap:PaymentsToAcquireEquityMethodInvestments

us-gaap:PaymentsToAcquireEquityMethodInvestments


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0002000000.000
Percentage of PaymentsToAcquireEquityMethodInvestments0.00.00.0100.00.00.0

us-gaap:PaymentsToAcquireMarketableSecurities

us-gaap:PaymentsToAcquireMarketableSecurities


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value58925776911641121372955052133465412151120.00.00.00.00.07.633152.848106.2436.8348.991242
Percentage of PaymentsToAcquireMarketableSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromConvertibleDebt

us-gaap:ProceedsFromConvertibleDebt


Proceeds
Period End2021-06-302021-03-312020-12-31
Value442419
Percentage of ProceedsFromConvertibleDebt100.0100.0100.0

us-gaap:ProceedsFromConvertibleDebt chgg:DebtInstrumentTransaction, chgg:DebtInstrumentTransactionPeriod, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:CappedCall, chgg:SettlementOfPrincipalDuringThreeMonths, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Proceeds
Period End2021-06-30
Value44
Percentage of ProceedsFromConvertibleDebt100.0

us-gaap:ProceedsFromConvertibleDebt chgg:DebtInstrumentTransaction, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:CappedCall, chgg:A0.125PercentConvertibleSeniorNotesDue2025, us-gaap:SeniorNotes


Proceeds
Period End2020-08-31
Value23
Percentage of ProceedsFromConvertibleDebt0.0

chgg:CappedCall, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Proceeds
Period End2020-08-31
Value57
Percentage of ProceedsFromConvertibleDebt0.0

us-gaap:ProceedsFromDebtNetOfIssuanceCosts

us-gaap:ProceedsFromDebtNetOfIssuanceCosts


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.09840.00.00.00.0976820.00.0173350.00.00.0
Percentage of ProceedsFromDebtNetOfIssuanceCosts0.0100.00.00.00.00.0100.0100.00.0100.0100.00.00.00.0

us-gaap:ProceedsFromDebtNetOfIssuanceCosts chgg:DebtInstrumentTransaction, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:CappedCall, chgg:A0ConvertibleSeniorNotesDue2026, us-gaap:SeniorNotes


Proceeds
Period End2020-08-31
Value103
Percentage of ProceedsFromDebtNetOfIssuanceCosts0.0

us-gaap:ProceedsFromDebtNetOfIssuanceCosts us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:A0ConvertibleSeniorNotesDue2026, us-gaap:SeniorNotes


Proceeds
Period End2020-08-31
Value984
Percentage of ProceedsFromDebtNetOfIssuanceCosts0.0

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromIssuanceOfCommonStock


Proceeds
Period End2021-06-302021-03-312018-12-312017-12-312016-12-31
Value0.010910.0-0.0230.0
Percentage of ProceedsFromIssuanceOfCommonStock0.0100.00.0100.00.0

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

us-gaap:ProceedsFromIssuanceOfDebt

chgg:A0ConvertibleSeniorNotesDue2026, us-gaap:SeniorNotes


Proceeds
Period End2020-08-31
Value1000
Percentage of ProceedsFromIssuanceOfDebt100.0

us-gaap:ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities

us-gaap:ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value2741811271401491211331043748204650219.750.00.00.00.00.00.66.24417107.5512128.631613
Percentage of ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfEquityMethodInvestments

us-gaap:ProceedsFromSaleOfEquityMethodInvestments


Proceeds
Period End2021-06-302021-03-31
Value236000.06845000.0
Percentage of ProceedsFromSaleOfEquityMethodInvestments100.0100.0

us-gaap:ProceedsFromSaleOfEquityMethodInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

chgg:ForeignEntity


Proceeds
Period End2021-03-31
Value7100000.0
Percentage of ProceedsFromSaleOfEquityMethodInvestments103.7

us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty us-gaap:CounterpartyName, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty

chgg:PayPalHoldingsInc., chgg:PaymentProcessingFees, us-gaap:ImmediateFamilyMemberOfManagementOrPrincipalOwner


Related
Period End2021-06-302021-03-312020-06-302020-03-312017-12-312017-09-30
Value700000.0700000.0500000.0500000.0200000.0300000.0
Percentage of RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty100.0100.0100.0100.0100.0100.0

us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty

chgg:PayPal, chgg:BoardOfDirectorsMember


Related
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value500000.0500000.0500000.0400000.0400000.0400000.0400000.0200000.0400000.0300000.0200000.0300000.0
Percentage of RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty0.0100.0100.00.00.00.00.00.00.0100.00.00.0

us-gaap:RelatedPartyTransactionPurchasesFromRelatedParty us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RelatedPartyTransactionPurchasesFromRelatedParty

chgg:AdobeSystems, srt:ChiefExecutiveOfficer


Related
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.40.60.60.30.40.40.20.40.41.00.50.60.6
Percentage of RelatedPartyTransactionPurchasesFromRelatedParty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

chgg:SynackInc., chgg:BoardOfDirectorsMember


Related
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302015-12-312015-09-30
Value0.00.00.00.10.00.10.00.30.10.00.00.1
Percentage of RelatedPartyTransactionPurchasesFromRelatedParty0.00.00.025.00.025.00.030.016.70.00.00.0

chgg:ZuoraInc, chgg:BoardOfDirectorsMember


Related
Period End2021-06-302021-03-312020-06-302020-03-31
Value0.00.40.20.2
Percentage of RelatedPartyTransactionPurchasesFromRelatedParty0.066.750.050.0

us-gaap:RepaymentsOfConvertibleDebt

us-gaap:RepaymentsOfConvertibleDebt


Repayments
Period End2021-06-302021-03-312020-12-31
Value110189144
Percentage of RepaymentsOfConvertibleDebt100.0100.0100.0

us-gaap:RepaymentsOfConvertibleDebt chgg:DebtInstrumentTransaction, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:ExchangeOfAggregatePrincipalAmount, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Repayments
Period End2021-06-302021-03-31
Value0.0174
Percentage of RepaymentsOfConvertibleDebt0.092.0

us-gaap:RepaymentsOfConvertibleDebt chgg:DebtInstrumentTransactionPeriod, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:SettlementOfPrincipalDuringThreeMonths, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Repayments
Period End2021-06-30
Value110
Percentage of RepaymentsOfConvertibleDebt100.0

us-gaap:RepaymentsOfConvertibleDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:A0.125PercentConvertibleSeniorNotesDue2025, us-gaap:SeniorNotes


Repayments
Period End2021-06-302021-03-31
Value0.0184
Percentage of RepaymentsOfConvertibleDebt0.097.4

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Repayments
Period End2021-03-312020-08-31
Value4.7174
Percentage of RepaymentsOfConvertibleDebt2.50.0

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

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes, us-gaap:SubsequentEvent


Repayments
Period End2021-04-30
Value20
Percentage of RepaymentsOfConvertibleDebt0.0

us-gaap:RevenueFromRelatedParties us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RevenueFromRelatedParties

chgg:AdobeSystems, srt:ChiefExecutiveOfficer


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value00100000.0100000.0200000.0000000
Percentage of RevenueFromRelatedParties0.00.0100.0100.0100.00.00.00.00.00.00.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


Right
Period End2020-12-312020-09-302019-12-312019-09-302018-12-31
Value110.00.7262.6380.0
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.00.0100.0100.00.0

us-gaap:SaleOfStockConsiderationReceivedOnTransaction us-gaap:SubsequentEventType

us-gaap:SaleOfStockConsiderationReceivedOnTransaction

us-gaap:SubsequentEvent


Sale
Period End2021-02-22
Value1091
Percentage of SaleOfStockConsiderationReceivedOnTransaction100.0

us-gaap:SaleOfStockConsiderationReceivedOnTransaction us-gaap:SubsidiarySaleOfStock

chgg:PublicOffering


Sale
Period End2021-02-28
Value1091
Percentage of SaleOfStockConsiderationReceivedOnTransaction0.0

us-gaap:SaleOfStockNumberOfSharesIssuedInTransaction us-gaap:SubsequentEventType, us-gaap:SubsidiarySaleOfStock

us-gaap:SaleOfStockNumberOfSharesIssuedInTransaction

us-gaap:SubsequentEvent, chgg:OverAllotmentOptionSellingStockholders


Sale
Period End2021-02-18
Value0.3
Percentage of SaleOfStockNumberOfSharesIssuedInTransaction100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue

chgg:RestrictedStockUnitsRSUsAndPerformanceShareUnitsPSUs


Share
Period End2021-06-302021-03-312020-12-31
Value3.5538.791.27
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

chgg:PerformanceSharesFinancialAndStrategicPerformanceTargets


Share
Period End2021-06-302021-03-31
Value099.05
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.0100.0

chgg:PerformanceSharesMarketBasedConditions


Share
Period End2021-06-302021-03-31
Value068.55
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.069.2

chgg:RestrictedStockUnitsRSUsAndPerformanceShareUnitsPSUs


Share
Period End2021-06-302021-03-312020-12-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-0.387.141.830.180.180.044.220.020.070.156.64
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.088.00.00.00.00.00.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

chgg:RestrictedStockUnitsRSUsAndPerformanceShareUnitsPSUs


Share
Period End2021-06-302021-03-312020-12-31
Value2.9929.291.33
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-30
Value2.8570.1260.04.182
Percentage of StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities100.0100.00.0100.0

us-gaap:StockIssuedDuringPeriodSharesNewIssues us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesNewIssues

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-31
Value0.010
Percentage of StockIssuedDuringPeriodSharesNewIssues0.0100.0

us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value327000.0828000.0243000.0268000.01599000.0319000.0294000.02451000.0282000.0
Percentage of StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities


Stock
Period End2021-06-302021-03-312020-12-312020-09-30
Value224110.0327
Percentage of StockIssuedDuringPeriodValueConversionOfConvertibleSecurities100.0100.00.0100.0

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-30
Value224110.0327
Percentage of StockIssuedDuringPeriodValueConversionOfConvertibleSecurities100.0100.00.0100.0

us-gaap:CommonStock


Stock
Period End2021-06-302020-12-312020-09-30
Value0.0030.00.004
Percentage of StockIssuedDuringPeriodValueConversionOfConvertibleSecurities0.00.00.0

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value-15465000.0-59175000.0-11120000.0-7268000.0-46834000.0-8824000.0-6207000.0-76042000.0-5355000.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value-15466000.0-59176000.0-11120000.0-7268000.0-46836000.0-8825000.0-6207000.0-76044000.0-5355000.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value1000.01000.0002000.01000.002000.00
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0

chgg:AccruedContentRelatedCostsCurrent

chgg:AccruedContentRelatedCostsCurrent


Accrued
Period End2020-12-312019-12-31
Value6273000.01907000.0
Percentage of AccruedContentRelatedCostsCurrent100.0100.0

chgg:AccruedEscrowRelatedToAcquisitionCurrent

chgg:AccruedEscrowRelatedToAcquisitionCurrent


Accrued
Period End2020-12-31
Value7451000.0
Percentage of AccruedEscrowRelatedToAcquisitionCurrent100.0

chgg:AccruedPurchasesOfLongLivedAssets

chgg:AccruedPurchasesOfLongLivedAssets


Accrued
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1.588101.213.5732.333
Percentage of AccruedPurchasesOfLongLivedAssets100.0100.0100.0100.0100.0

chgg:AcquisitionRelatedCompensationLiability

chgg:AcquisitionRelatedCompensationLiability


Acquisition
Period End2020-12-312019-12-312018-12-312017-12-31
Value9611000.04042000.08536000.0623000.0
Percentage of AcquisitionRelatedCompensationLiability100.0100.0100.0100.0

chgg:AvailableforsaleSecuritiesDebtMaturitiesYearOneThroughTwoAmortizedCostBasis

chgg:AvailableforsaleSecuritiesDebtMaturitiesYearOneThroughTwoAmortizedCostBasis


Availableforsale
Period End2021-06-302021-03-312020-12-312020-09-30
Value485712523521
Percentage of AvailableforsaleSecuritiesDebtMaturitiesYearOneThroughTwoAmortizedCostBasis100.0100.0100.0100.0

chgg:AvailableforsaleSecuritiesDebtMaturitiesYearOneThroughTwoFairValue

chgg:AvailableforsaleSecuritiesDebtMaturitiesYearOneThroughTwoFairValue


Availableforsale
Period End2021-06-302021-03-312020-12-312020-09-30
Value484711523521
Percentage of AvailableforsaleSecuritiesDebtMaturitiesYearOneThroughTwoFairValue100.0100.0100.0100.0

chgg:DebtInstrumentConvertibleDiscountForConversionOption us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:DebtInstrumentConvertibleDiscountForConversionOption

chgg:A0.125PercentConvertibleSeniorNotesDue2025, us-gaap:SeniorNotes


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value212212212212212212212185
Percentage of DebtInstrumentConvertibleDiscountForConversionOption100.0100.0100.0100.0100.0100.0100.0100.0

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value213264646464646464
Percentage of DebtInstrumentConvertibleDiscountForConversionOption10.115.230.330.330.330.330.334.60.0

chgg:DebtInstrumentConvertibleIssuanceCosts us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:DebtInstrumentConvertibleIssuanceCosts

chgg:A0.125PercentConvertibleSeniorNotesDue2025, us-gaap:SeniorNotes


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value5253000.05253000.05253000.05253000.05253000.05253000.05253000.04613000.0
Percentage of DebtInstrumentConvertibleIssuanceCosts100.0100.0100.0100.0100.0100.0100.0100.0

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value586000.0877000.01749000.01749000.01749000.01749000.01749000.01749000.01749000.0
Percentage of DebtInstrumentConvertibleIssuanceCosts11.216.733.333.333.333.333.337.90.0

chgg:DeferredTaxLiabilitiesConvertibleSeniorNotes

chgg:DeferredTaxLiabilitiesConvertibleSeniorNotes


Deferred
Period End2020-12-312019-12-312018-12-31
Value51270.046
Percentage of DeferredTaxLiabilitiesConvertibleSeniorNotes100.0100.0100.0

chgg:DeferredTaxLiabilitiesPropertyAndEquipmentTextbooksAndIntangibleAssets

chgg:DeferredTaxLiabilitiesPropertyAndEquipmentTextbooksAndIntangibleAssets


Deferred
Period End2020-12-312019-12-31
Value4066000.04111000.0
Percentage of DeferredTaxLiabilitiesPropertyAndEquipmentTextbooksAndIntangibleAssets100.0100.0

chgg:FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour

chgg:FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour


Finite
Period End2020-09-30
Value8706000.0
Percentage of FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour100.0

chgg:OrderFulfillmentFeesLiabilityCurrent

chgg:OrderFulfillmentFeesLiabilityCurrent


Order
Period End2020-12-312019-12-31
Value116.939
Percentage of OrderFulfillmentFeesLiabilityCurrent100.0100.0

chgg:PaymentProcessingFeesLiabilityCurrent

chgg:PaymentProcessingFeesLiabilityCurrent


Payment
Period End2020-12-312019-12-31
Value2130000.01137000.0
Percentage of PaymentProcessingFeesLiabilityCurrent100.0100.0

chgg:TextbookLibraryNet

chgg:TextbookLibraryNet


Textbook
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value1724343427310.00.00.00.00.02.5753.95611202944618480105100113105
Percentage of TextbookLibraryNet100.0100.0100.0100.0100.0100.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

chgg:TextbookLibraryNet us-gaap:ProductOrService

chgg:TextbookLibrary


Textbook
Period End2020-12-312020-09-302020-06-302020-03-31
Value34342731
Percentage of TextbookLibraryNet100.0100.199.9100.1

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value147000.0169000.0153000.0198000.0134000.0160000.056000.031000.023000.027000.0229000.0268000.0333000.0176000.0259000.0267000.0180000.0190000.0436000.0390000.0287000.0359000.0378000.0271000.0261000.0326000.0559000.0835000.0516000.0276000.0317000.0
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:AssetsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value8075324645102821921901793136302119162525111.2781.281.2846.672105.9957.2995.8285.6968.0861442
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value1706202611891244682646647653556861111141151051041180.00.024292635333545479062
Percentage of AssetsFairValueDisclosure211.5380.6255.9243.9241.7336.1339.9364.6177.613.8531.7586.2714.2418.8414.01077.00.00.01945.4441.9257.7586.1463.3604.8796.2593.3618.1149.6

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value25132558165317549658388378338697171321331311301301291.2781.282636364141415156104104
Percentage of AssetsFairValueDisclosure311.5480.6355.9343.9341.7436.1439.9464.6277.6113.8631.7686.2814.2518.8514.01177.0100.0100.02045.4541.9357.7686.1563.3704.8896.2693.3718.1249.6

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax us-gaap:CashAndCashEquivalents, us-gaap:InvestmentType

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

us-gaap:CommercialPaper, us-gaap:CashAndCashEquivalents


Available
Period End2021-03-312019-09-302019-06-302018-12-31
Value1000.0000
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.00.00.00.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax us-gaap:InvestmentType

us-gaap:CashAndCashEquivalents


Available
Period End2021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value1000.0000000
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.00.00.00.00.00.00.0

us-gaap:OtherLongTermInvestments


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value76000.0122000.0641000.0627000.01860000.0247000.0539000.0524000.0465000.09000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.012200.00.00.00.00.00.00.00.00.0

us-gaap:ShortTermInvestments


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value707000.01016000.01502000.02682000.02635000.0296000.0470000.0378000.0232000.00
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.0101600.00.00.00.00.00.00.00.00.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax us-gaap:InvestmentType, us-gaap:UnderlyingAssetClass

us-gaap:OtherLongTermInvestments, us-gaap:AgencySecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value1000.04000.036000.025000.09000.032000.06000.00
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.0400.00.00.00.00.00.00.0

us-gaap:OtherLongTermInvestments, us-gaap:CorporateBondSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value75000.0118000.0605000.0602000.01851000.0215000.0533000.0524000.09000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.011800.00.00.00.00.00.00.00.0

us-gaap:ShortTermInvestments, us-gaap:AgencySecurities


Available
Period End2021-06-302020-03-312019-12-312019-09-30
Value21000.020000.06000.07000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.00.00.00.0

us-gaap:ShortTermInvestments, us-gaap:CommercialPaper


Available
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302018-12-31
Value120000.078000.024000.038000.006000.00
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.07800.00.00.00.00.00.0

us-gaap:ShortTermInvestments, us-gaap:CorporateBondSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value566000.0938000.01478000.02644000.02581000.0149000.0425000.0321000.00
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.093800.00.00.00.00.00.00.00.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax us-gaap:CashAndCashEquivalents, us-gaap:InvestmentType

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

us-gaap:CommercialPaper, us-gaap:CashAndCashEquivalents


Available
Period End2021-03-312019-09-302019-06-302018-12-31
Value2000.011000.010000.00
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.00.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax us-gaap:InvestmentType

us-gaap:CashAndCashEquivalents


Available
Period End2021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value2000.000011000.010000.00
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.00.00.00.0100.0100.00.0

us-gaap:OtherLongTermInvestments


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value366000.0923000.0283000.0635000.0219000.01703000.0158000.0395000.0172000.016000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax0.046150.00.00.00.00.00.03590.91720.00.0

us-gaap:ShortTermInvestments


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value130000.0302000.054000.081000.041000.01338000.082000.083000.023000.0104000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax0.015100.00.00.00.00.00.0754.5230.00.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax us-gaap:InvestmentType, us-gaap:UnderlyingAssetClass

us-gaap:OtherLongTermInvestments, us-gaap:AgencySecurities


Available
Period End2021-03-312020-06-302020-03-312019-12-312019-09-30
Value2000.05000.00029000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.00.00.00.0263.6

us-gaap:OtherLongTermInvestments, us-gaap:CorporateBondSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value366000.0921000.0283000.0635000.0214000.01703000.0158000.0366000.014000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax0.046050.00.00.00.00.00.03327.30.0

us-gaap:ShortTermInvestments, us-gaap:CommercialPaper


Available
Period End2021-03-312020-12-312020-09-302019-12-312019-09-302018-12-31
Value32000.06000.024000.001000.012000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax1600.00.00.00.09.10.0

us-gaap:ShortTermInvestments, us-gaap:CorporateBondSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value130000.0270000.048000.057000.041000.01338000.078000.082000.087000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax0.013500.00.00.00.00.00.0745.50.0

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2513255916521752961840836832868717132134
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis us-gaap:CashAndCashEquivalents, us-gaap:InvestmentType

us-gaap:Cash, us-gaap:CashAndCashEquivalents


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value332415171719824130223427935134098
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis1.31.00.91.01.823.628.836.427.039.0264.5254.30.0

us-gaap:CommercialPaper, us-gaap:CashAndCashEquivalents


Available
Period End2021-03-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value997.4965221183122
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis3.90.96.03.013.823.20.0

us-gaap:MoneyMarketFunds, us-gaap:CashAndCashEquivalents


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value8075324642021501601461402686135.0527.0175.358
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis32.120.828.111.615.619.117.516.830.985.53.85.20.0

us-gaap:USTreasurySecurities, us-gaap:CashAndCashEquivalents


Available
Period End2020-09-302020-06-30
Value307117
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis17.612.2

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis us-gaap:InvestmentType

us-gaap:CashAndCashEquivalents


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value840656479527285359387450555914374379126
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis33.425.629.030.129.742.746.354.164.0127.5282.1282.70.0

us-gaap:OtherLongTermInvestments


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value48571252352127827431033928812161420
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis19.327.831.729.729.032.737.140.833.21.712.111.20.0

us-gaap:ShortTermInvestments


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1221121566472041440538034525970938181
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis48.647.540.241.143.248.345.541.429.89.870.460.40.0

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis us-gaap:InvestmentType, us-gaap:UnderlyingAssetClass

us-gaap:OtherLongTermInvestments, us-gaap:AgencySecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value9.038386460181430
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.41.52.43.76.32.21.83.6

us-gaap:OtherLongTermInvestments, us-gaap:CorporateBondSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value47667348445621825629530914
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis18.926.329.326.122.730.535.337.210.9

us-gaap:ShortTermInvestments, us-gaap:AgencySecurities


Available
Period End2021-06-302020-03-312019-12-312019-09-30
Value151410.025
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.61.81.23.0

us-gaap:ShortTermInvestments, us-gaap:CommercialPaper


Available
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302018-12-31
Value5146052042047.4894840
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis20.523.712.411.60.95.830.5

us-gaap:ShortTermInvestments, us-gaap:CorporateBondSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value69060945951639935931823238
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis27.523.827.829.541.642.738.128.029.1

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost


Available
Period End2021-06-302021-03-312020-12-312020-09-30
Value122113146641028
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue


Available
Period End2021-06-302021-03-312020-12-312020-09-30
Value122113156651031
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost


Available
Period End2021-06-302021-03-312020-12-312020-09-30
Value807532464202
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue


Available
Period End2021-06-302021-03-312020-12-312020-09-30
Value807532464202
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities

us-gaap:AvailableForSaleSecuritiesDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2513255816531754965838837833869717132133
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:CashAndCashEquivalents, us-gaap:InvestmentType

us-gaap:Cash, us-gaap:CashAndCashEquivalents


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value332415171719824130223427935134098
Percentage of AvailableForSaleSecuritiesDebtSecurities1.31.00.91.01.823.728.836.327.039.0264.7254.50.0

us-gaap:CommercialPaper, us-gaap:CashAndCashEquivalents


Available
Period End2021-03-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value997.4855221183122
Percentage of AvailableForSaleSecuritiesDebtSecurities3.90.96.03.013.823.20.0

us-gaap:MoneyMarketFunds, us-gaap:CashAndCashEquivalents


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value8075324642021501601461402686135.0527.0175.358
Percentage of AvailableForSaleSecuritiesDebtSecurities32.120.828.111.515.519.117.416.830.985.53.85.20.0

us-gaap:USTreasurySecurities, us-gaap:CashAndCashEquivalents


Available
Period End2020-09-302020-06-30
Value307117
Percentage of AvailableForSaleSecuritiesDebtSecurities17.512.2

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:InvestmentType

us-gaap:CashAndCashEquivalents


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value840656479527285359387450555914374379126
Percentage of AvailableForSaleSecuritiesDebtSecurities33.425.629.030.129.542.846.354.163.9127.5282.3283.00.0

us-gaap:OtherLongTermInvestments


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value48471152352128027331034028812161420
Percentage of AvailableForSaleSecuritiesDebtSecurities19.327.831.729.729.132.637.140.833.21.712.111.20.0

us-gaap:ShortTermInvestments


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1221121566572341740438134525970938081
Percentage of AvailableForSaleSecuritiesDebtSecurities48.647.540.241.243.248.345.541.529.89.870.360.40.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:InvestmentType, us-gaap:UnderlyingAssetClass

us-gaap:OtherLongTermInvestments, us-gaap:AgencySecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value9.00138396460181529
Percentage of AvailableForSaleSecuritiesDebtSecurities0.41.52.43.76.32.21.83.6

us-gaap:OtherLongTermInvestments, us-gaap:CorporateBondSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value47567248445621925429531014
Percentage of AvailableForSaleSecuritiesDebtSecurities18.926.329.326.022.830.435.337.210.9

us-gaap:ShortTermInvestments, us-gaap:AgencySecurities


Available
Period End2021-06-302020-03-312019-12-312019-09-30
Value15151025
Percentage of AvailableForSaleSecuritiesDebtSecurities0.61.81.23.0

us-gaap:ShortTermInvestments, us-gaap:CommercialPaper


Available
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302018-12-31
Value5146052042047.4894840
Percentage of AvailableForSaleSecuritiesDebtSecurities20.523.712.311.60.95.830.5

us-gaap:ShortTermInvestments, us-gaap:CorporateBondSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value69161046151940235731923338
Percentage of AvailableForSaleSecuritiesDebtSecurities27.523.927.929.641.742.738.128.029.0

us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh

chgg:ThinkfulInc.


Business
Period End2020-12-312019-10-01
Value1220
Percentage of BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh100.0100.0

us-gaap:BusinessCombinationContingentConsiderationLiability us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationContingentConsiderationLiability

chgg:MathwayLLC


Business
Period End2020-12-312020-09-30
Value2900000.01700000.0
Percentage of BusinessCombinationContingentConsiderationLiability100.0100.0

chgg:ThinkfulInc.


Business
Period End2020-12-312019-12-31
Value5700000.03000000.0
Percentage of BusinessCombinationContingentConsiderationLiability196.60.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets

chgg:TechnologyCompany


Business
Period End2021-02-22
Value0.4
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles

chgg:TechnologyCompany


Business
Period End2021-02-22
Value3.3
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities

chgg:TechnologyCompany


Business
Period End2021-02-22
Value1500000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:CommercialPaper, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Cash
Period End2021-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value997.48552211831293222202.0995.4531.752.9994.9490.4531.192.01.5
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MoneyMarketFunds, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value8075324642021501601461402686135.0527.0175.0325.1925.358111.2781.281.2846.672105.9957.2995.8285.6966.33442
Percentage of CashAndCashEquivalentsFairValueDisclosure0.0536.40.00.00.00.00.01873.0513.12870.627.722.617.216.023.652.70.00.061.2122.4577.6199.9147.51286.5478.7316.72802.8

us-gaap:USTreasurySecurities, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Cash
Period End2020-09-302020-06-30
Value307117
Percentage of CashAndCashEquivalentsFairValueDisclosure0.00.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByAssetClass, us-gaap:FairValueByMeasurementFrequency

us-gaap:CommercialPaper, us-gaap:FairValueMeasurementsRecurring


Cash
Period End2021-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value997.48552211831293222202.0995.4531.752.9994.9490.4531.192.01.5
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MoneyMarketFunds, us-gaap:FairValueMeasurementsRecurring


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value8075324642021501601461402686135.0527.0175.0325.1925.358111.2781.281.2846.672105.9957.2995.8285.6966.33442
Percentage of CashAndCashEquivalentsFairValueDisclosure0.0536.40.00.00.00.00.01873.0513.12870.627.722.617.216.023.652.70.00.061.2122.4577.6199.9147.51286.5478.7316.72802.8

us-gaap:USTreasurySecurities, us-gaap:FairValueMeasurementsRecurring


Cash
Period End2020-09-302020-06-30
Value307117
Percentage of CashAndCashEquivalentsFairValueDisclosure0.00.0

us-gaap:ContractWithCustomerAssetNetCurrent

us-gaap:ContractWithCustomerAssetNetCurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value1618138.2144.7424.4823.5310.337
Percentage of ContractWithCustomerAssetNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent chgg:DebtInstrumentTransaction, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent

chgg:ExchangeOfAggregatePrincipalAmount, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2020-12-31
Value345
Percentage of DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent100.0

chgg:ExtinguishmentOfAggregatePrincipalAmount, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2020-12-31
Value97
Percentage of DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent28.1

us-gaap:DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:A0.125PercentConvertibleSeniorNotesDue2025, us-gaap:SeniorNotes


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-04-302019-03-31
Value206206206206206206206212180
Percentage of DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent59.80.00.00.00.00.00.00.00.0

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2020-12-312020-09-302020-08-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-04-30
Value203134562626262626262626264
Percentage of DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent6.10.00.00.00.00.00.00.00.00.00.00.00.0

chgg:A0ConvertibleSeniorNotesDue2026, us-gaap:SeniorNotes


Debt
Period End2020-12-312020-09-302020-08-31
Value237237241
Percentage of DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent68.70.00.0

us-gaap:DebtInstrumentConvertibleConversionPrice1 chgg:DebtInstrumentTransaction, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentConvertibleConversionPrice1

chgg:CappedCall, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2021-03-312020-12-312020-09-302019-09-302019-06-302019-03-312018-12-312018-04-30
Value40.6840.6840.6840.6840.6840.6840.6826.95
Percentage of DebtInstrumentConvertibleConversionPrice1100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:DebtInstrumentFaceAmount

chgg:A0.125PercentConvertibleSeniorNotesDue2025, us-gaap:SeniorNotes


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-04-302019-03-31
Value699699800800800800800800800100700
Percentage of DebtInstrumentFaceAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-04-30
Value110115173344345345345345345345345345345
Percentage of DebtInstrumentFaceAmount15.814.421.643.143.143.143.143.149.30.00.00.00.0

us-gaap:DebtInstrumentRepurchasedFaceAmount chgg:DebtInstrumentTransaction, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentRepurchasedFaceAmount

chgg:ElectionOfOptionToRedeemOutstandingNotes, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2021-06-30
Value90
Percentage of DebtInstrumentRepurchasedFaceAmount100.0

chgg:ExchangeOfAggregatePrincipalAmount, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2020-12-31
Value172
Percentage of DebtInstrumentRepurchasedFaceAmount0.0

chgg:ExtinguishmentOfAggregatePrincipalAmount, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2020-12-31
Value57
Percentage of DebtInstrumentRepurchasedFaceAmount0.0

chgg:RequestsForConversions, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2021-06-30
Value24
Percentage of DebtInstrumentRepurchasedFaceAmount27.2

us-gaap:DebtInstrumentRepurchasedFaceAmount chgg:DebtInstrumentTransactionPeriod, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:SettlementOfPrincipalDuringSixMonths, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2021-06-30
Value115
Percentage of DebtInstrumentRepurchasedFaceAmount127.2

chgg:SettlementOfPrincipalDuringThreeMonths, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2021-06-30
Value110
Percentage of DebtInstrumentRepurchasedFaceAmount122.0

us-gaap:DebtInstrumentRepurchasedFaceAmount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2020-12-312020-08-31
Value57172
Percentage of DebtInstrumentRepurchasedFaceAmount0.00.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet

chgg:A0.125PercentConvertibleSeniorNotesDue2025, us-gaap:SeniorNotes


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value149158167175184193202184
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet100.0100.0100.0100.0100.0100.0100.0100.0

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value10.01636394245485154
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet6.710.421.622.322.923.524.028.00.0

chgg:A0ConvertibleSeniorNotesDue2026, us-gaap:SeniorNotes


Debt
Period End2020-12-312020-09-30
Value226236
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet152.0149.8

us-gaap:DeferredFinanceCostsNet chgg:DebtInstrumentComponent, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DeferredFinanceCostsNet

chgg:DebtInstrumentEquityComponent, chgg:A0ConvertibleSeniorNotesDue2026, us-gaap:SeniorNotes


Deferred
Period End2020-08-31
Value3.8
Percentage of DeferredFinanceCostsNet100.0

chgg:DebtInstrumentLiabilityComponent, chgg:A0ConvertibleSeniorNotesDue2026, us-gaap:SeniorNotes


Deferred
Period End2020-08-31
Value12
Percentage of DeferredFinanceCostsNet318.4

us-gaap:DeferredFinanceCostsNet us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:A0.125PercentConvertibleSeniorNotesDue2025, us-gaap:SeniorNotes


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-04-302019-03-31
Value1111101011121213131912
Percentage of DeferredFinanceCostsNet0.00.00.00.00.00.00.00.00.00.00.0

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Deferred
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-04-30
Value1.41.22.04.34.75.05.45.86.1476.5159.4
Percentage of DeferredFinanceCostsNet0.00.00.00.00.00.00.00.00.00.00.0

chgg:A0ConvertibleSeniorNotesDue2026, us-gaap:SeniorNotes


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-08-31
Value1314111115
Percentage of DeferredFinanceCostsNet0.00.00.00.0418.4

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value61355.9432.8691.4130.8620.3210.0
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:DeferredTaxAssetsDeferredIncome

us-gaap:DeferredTaxAssetsDeferredIncome


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value2402000.0997000.02075000.001085000.01488000.04589000.03373000.0
Percentage of DeferredTaxAssetsDeferredIncome100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value21118213092110987958
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1901621067173583634
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value5734000.03438000.02905000.0960000.01407000.01612000.02277000.02628000.0
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value6.47312131423211813
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value6365000.03978000.01661000.01665000.05069000.07351000.06291000.02405000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value5890000.04661000.05943000.02869000.01413000.0
Percentage of DeferredTaxLiabilitiesOther100.0100.0100.0100.0100.0

us-gaap:DueToOfficersOrStockholdersCurrent us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:DueToOfficersOrStockholdersCurrent

chgg:AdobeSystems, srt:ChiefExecutiveOfficer


Due
Period End2020-12-312020-09-302019-12-312019-06-30
Value100000.0100000.0200000.00
Percentage of DueToOfficersOrStockholdersCurrent100.0100.0100.00.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions

chgg:RestrictedStockUnitsRSUsAndPerformanceShareUnitsPSUs


Employee
Period End2021-06-302021-03-312020-12-312020-09-30
Value195206110122
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value484440373432302827262423212018171614131211109.8018.3658.6196.9455.2531312
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerLists


Finite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value109.7189.08.548.217.8727.537.1886.8476.5056.1635.8225.485.1384.6534.1633.6733.1922.6952.3332.2392.1452.0511.6381.8161.2480.5895.1755.029
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization21.321.822.423.023.724.524.524.825.224.625.125.225.325.324.623.722.721.620.119.119.419.620.919.621.118.011.239.740.5

us-gaap:DevelopedTechnologyRights


Finite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value242522201816151413121110109.6169.1598.7028.2457.7797.3066.9196.7026.4675.9185.3695.04.4173.8225.7515.386
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization49.557.055.253.953.152.151.751.250.547.947.046.947.147.348.349.551.052.654.656.758.059.260.464.258.063.672.844.243.4

us-gaap:MediaContent


Finite
Period End2020-12-312019-12-31
Value4.391.944
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization9.05.6

us-gaap:NoncompeteAgreements


Finite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value1.9811.9621.9381.9141.891.8651.841.8011.7351.6681.6021.5541.5061.4581.3891.321.2491.1771.1050.970.8320.6950.5570.420.4210.250.0861.0651.062
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization4.04.44.85.25.55.86.06.26.46.36.56.76.97.27.37.57.78.08.38.07.26.45.75.04.93.61.68.28.6

us-gaap:TradeNames


Finite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value7.8887.4677.0466.6486.1695.6815.4625.1624.8634.5424.2143.863.4653.0772.7172.3581.9981.6611.3341.0660.920.7730.6270.4811.0850.9320.7031.020.942
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization16.116.817.617.917.817.717.817.817.917.217.216.716.015.114.313.412.411.210.08.78.07.16.45.812.613.413.47.87.6

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive


Finite
Period End2020-12-31
Value5080000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear


Finite
Period End2020-09-30
Value4404000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive


Finite
Period End2020-12-31
Value3893000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:CustomerLists


Finite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value1616169.979.979.979.979.979.979.979.979.979.979.979.979.979.979.839.832.822.822.822.822.824.3633.3123.3125.4725.472
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DevelopedTechnologyRights


Finite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value546666434331313131312520201515151515159.4179.4179.4179.4179.4189.7929.5129.5128.0088.008
Percentage of FiniteLivedIntangibleAssetsGross336.0411.5411.5434.0434.0317.6317.6317.6317.6317.6251.8207.2207.2151.2151.2151.2151.2152.8152.8333.9333.9333.9333.9334.0224.4287.2287.2146.3146.3

us-gaap:NoncompeteAgreements


Finite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value2.0182.0182.0182.0182.0182.0182.0182.0182.0182.0181.7981.7981.7981.7281.7281.7281.7281.721.721.221.221.221.221.221.6371.3181.3181.1081.068
Percentage of FiniteLivedIntangibleAssetsGross12.512.512.520.220.220.220.220.220.220.218.018.018.017.317.317.317.317.517.543.343.343.343.343.337.539.839.820.219.5

us-gaap:TradeNames


Finite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value11111110106.1136.1136.1136.1136.1135.7935.7935.7935.5135.5135.5135.5135.2435.2432.3432.3432.3432.3432.3433.1323.1323.1321.1821.182
Percentage of FiniteLivedIntangibleAssetsGross71.771.771.7109.1109.161.361.361.361.361.358.158.158.155.355.355.355.353.353.383.183.183.183.183.171.894.694.621.621.6

us-gaap:IntangibleAssetsGrossExcludingGoodwill

us-gaap:IntangibleAssetsGrossExcludingGoodwill


Intangible
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value100999969695253535354474342363636363636202020202023
Percentage of IntangibleAssetsGrossExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType

us-gaap:InvestmentsFairValueDisclosure

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:AgencySecurities


Investments
Period End2020-12-312019-12-312016-03-312015-12-312015-09-302015-06-30
Value39151.0010.9981.0031.001
Percentage of InvestmentsFairValueDisclosure100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CorporateBondSecurities


Investments
Period End2020-12-312019-12-312018-12-312018-03-312017-12-312017-09-302016-03-312015-12-312015-09-302015-06-302014-12-312014-09-302014-06-302014-03-31
Value484295141020171.8773.2311.9323.7261.451131633
Percentage of InvestmentsFairValueDisclosure1241.61969.20.00.00.00.0187.5323.7192.6372.20.00.00.00.0

us-gaap:InvestmentsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType

us-gaap:FairValueMeasurementsRecurring, us-gaap:AgencySecurities


Investments
Period End2020-12-312019-12-312016-03-312015-12-312015-09-302015-06-30
Value39151.0010.9981.0031.001
Percentage of InvestmentsFairValueDisclosure100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementsRecurring, us-gaap:CorporateBondSecurities


Investments
Period End2020-12-312019-12-312018-12-312018-03-312017-12-312017-09-302016-03-312015-12-312015-09-302015-06-302014-12-312014-09-302014-06-302014-03-31
Value484295141020171.8773.2311.9323.7261.451131633
Percentage of InvestmentsFairValueDisclosure1241.61969.20.00.00.00.0187.5323.7192.6372.20.00.00.00.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2020-12-31
Value7702000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0

us-gaap:LongTermDebtFairValue chgg:DebtInstrumentTransaction, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LongTermDebtFairValue

chgg:ExchangeOfAggregatePrincipalAmount, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Long
Period End2020-12-31
Value156
Percentage of LongTermDebtFairValue100.0

chgg:ExtinguishmentOfAggregatePrincipalAmount, chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Long
Period End2020-12-31
Value52
Percentage of LongTermDebtFairValue33.7

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

chgg:A0.125PercentConvertibleSeniorNotesDue2025, us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:FairValueMeasurementsNonrecurring, us-gaap:SeniorNotes


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value6886886406316216126025935835020.0
Percentage of LongTermDebtFairValue0.00.0410.40.00.00.00.00.00.00.00.0

chgg:A0.125PercentConvertibleSeniorNotesDue2025, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsNonrecurring, us-gaap:SeniorNotes


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value118212021456120811357448317358036930.0
Percentage of LongTermDebtFairValue0.00.0933.20.00.00.00.00.00.00.00.0

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:FairValueMeasurementsNonrecurring, us-gaap:SeniorNotes


Long
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value109104154304301297294290287283
Percentage of LongTermDebtFairValue0.066.90.00.00.00.00.00.00.00.0

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsNonrecurring, us-gaap:SeniorNotes


Long
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value377376462862492523443526520416
Percentage of LongTermDebtFairValue0.0241.50.00.00.00.00.00.00.00.0

chgg:A0ConvertibleSeniorNotesDue2026, us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:FairValueMeasurementsNonrecurring, us-gaap:SeniorNotes


Long
Period End2021-06-302021-03-312020-12-312020-09-30
Value986985761751
Percentage of LongTermDebtFairValue0.00.0488.10.0

chgg:A0ConvertibleSeniorNotesDue2026, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsNonrecurring, us-gaap:SeniorNotes


Long
Period End2021-06-302021-03-312020-12-312020-09-30
Value1050105411291000
Percentage of LongTermDebtFairValue0.00.0723.50.0

us-gaap:LongTermDebtFairValue us-gaap:DebtInstrument, us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType

chgg:A0ConvertibleSeniorNotesDue2026, us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:SeniorNotes


Long
Period End2020-08-31
Value758
Percentage of LongTermDebtFairValue0.0

us-gaap:LongTermDebtFairValue us-gaap:DebtInstrument, us-gaap:LongtermDebtType

chgg:A0.25PercentConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Long
Period End2020-08-31
Value156
Percentage of LongTermDebtFairValue0.0

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

us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:FairValueMeasurementsNonrecurring, us-gaap:SeniorNotes


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1675178315061536926913900887874789283280276
Percentage of LongTermDebtFairValue0.00.0965.40.00.00.00.00.00.00.00.00.00.0

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsNonrecurring, us-gaap:SeniorNotes


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2233263329632671199812361354117913301214416411413
Percentage of LongTermDebtFairValue0.00.01898.20.00.00.00.00.00.00.00.00.00.0

us-gaap:LossContingencyEstimateOfPossibleLoss us-gaap:LitigationCase, us-gaap:LitigationStatus

us-gaap:LossContingencyEstimateOfPossibleLoss

chgg:VitalSourceTechnologiesLLCVSTVsChegg, us-gaap:PendingLitigation


Loss
Period End2020-07-21
Value75000.0
Percentage of LossContingencyEstimateOfPossibleLoss100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2020-12-312019-12-31
Value4.84.7
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:OperatingLossCarryforwards

us-gaap:DomesticCountry


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value6745913722572001599698
Percentage of OperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StateAndLocalJurisdiction


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value5114402731951511205637
Percentage of OperatingLossCarryforwards75.874.573.475.975.575.558.338.1

us-gaap:PrepaidExpenseCurrent

us-gaap:PrepaidExpenseCurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value182512151617109.65412154.6737.0998.707102.0433.8656.958.1972.5794.0185.6088.4773.1175.7867.6578.6113.0913.3913.6523.0252.134
Percentage of PrepaidExpenseCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCash us-gaap:RestrictedCashAndCashEquivalentsCashAndCashEquivalents

us-gaap:RestrictedCash

chgg:SecurityDepositForOffice


Restricted
Period End2020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-31
Value2000000.02000000.01900000.01900000.01300000.0500000.0100000.0
Percentage of RestrictedCash100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCashAndCashEquivalentsAtCarryingValue

us-gaap:RestrictedCashAndCashEquivalentsAtCarryingValue


Restricted
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-03-312016-12-31
Value38000.0122000.0313000.0308000.0306000.0149000.0125000.0121000.0121000.084000.00084000.084000.000
Percentage of RestrictedCashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.00.00.0

us-gaap:RestrictedCashAndCashEquivalentsNoncurrent

us-gaap:RestrictedCashAndCashEquivalentsNoncurrent


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value1720000.01730000.01740000.01736000.01718000.01561000.01763000.01181000.01066000.0920000.01197000.0701000.0483000.0423000.0422000.0400000.0500000.0500000.0100000.0
Percentage of RestrictedCashAndCashEquivalentsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SaleOfStockPricePerShare us-gaap:SubsequentEventType, us-gaap:SubsidiarySaleOfStock

us-gaap:SaleOfStockPricePerShare

us-gaap:SubsequentEvent, us-gaap:OverAllotmentOption


Sale
Period End2021-02-17
Value102.0
Percentage of SaleOfStockPricePerShare100.0

us-gaap:SaleOfStockPricePerShare us-gaap:SubsidiarySaleOfStock

chgg:PublicOffering


Sale
Period End2021-02-28
Value102.0
Percentage of SaleOfStockPricePerShare0.0

us-gaap:SeniorLongTermNotes

us-gaap:SeniorLongTermNotes


Senior
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value16751673150615369269139008878747892832802760.0
Percentage of SeniorLongTermNotes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:SeniorNotesCurrent

us-gaap:SeniorNotesCurrent


Senior
Period End2021-03-31
Value109
Percentage of SeniorNotesCurrent100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

chgg:RestrictedStockUnitsRSUsAndPerformanceShareUnitsPSUs


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value61.9258.3937.8235.9234.2431.9624.0422.2821.2719.7611.8711.4710.629.836.786.576.415.875.25.135.135.296.576.286.266.286.25
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value514790596.6086115.0824896.1241728.122971106.6466295.2472437.3319918.88825422
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SharePrice us-gaap:LongtermDebtType

us-gaap:SharePrice

us-gaap:SeniorNotes


Share
Period End2020-12-312020-09-30
Value90.3371.44
Percentage of SharePrice100.0100.0

us-gaap:StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1

us-gaap:StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1


Stock
Period End2021-06-302021-03-312020-12-31
Value165165350
Percentage of StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1100.0100.0100.0

us-gaap:TaxCreditCarryforwardAmount us-gaap:IncomeTaxAuthority

us-gaap:TaxCreditCarryforwardAmount

us-gaap:DomesticCountry


Tax
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1914125.63.53.72.51.7
Percentage of TaxCreditCarryforwardAmount100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StateAndLocalJurisdiction


Tax
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value14119.46.44.34.02.72.0
Percentage of TaxCreditCarryforwardAmount77.580.475.8114.3122.9108.1108.0117.6

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value200000.0100000.073000.0800000.0600000.0700000.0500000.0400000.0
Percentage of UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate


Unrecognized
Period End2020-12-31
Value3400000.0
Percentage of UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate100.0

us-gaap:ValuationAllowancesAndReservesBalance us-gaap:ValuationAllowancesAndReservesType

us-gaap:ValuationAllowancesAndReservesBalance

chgg:AllowanceForDoubtfulAccount


Valuation
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value153000.056000.0229000.0259000.0436000.0378000.0
Percentage of ValuationAllowancesAndReservesBalance100.0100.0100.0100.0100.0100.0

chgg:RefundReserve


Valuation
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1515000.0554000.0396000.0282000.0487000.04538000.0
Percentage of ValuationAllowancesAndReservesBalance990.2989.3172.9108.9111.71200.5

Line plots across dimensions of each concept


us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
(None,)
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amountus-gaap: Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities
TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:IncomeStatementLocation
(None,)
Allocated Share Based Compensation Expenseus-gaap: Income Statement Location
us-gaap:InterestExpenseDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
(None, 'us-gaap:SeniorNotes')
Interest Expense Debtus-gaap: Debt Instrument, us-gaap: Longterm Debt Type
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ProductOrService
(None,)
Revenue From Contract With Customer Including Assessed Taxus-gaap: Product Or Service
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:ShortTermInvestments
us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType
('us-gaap:FairValueMeasurementsRecurring', None)
Short Term Investmentsus-gaap: Fair Value By Measurement Frequency, us-gaap: Investment Type
us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Property Plant And Equipment Grossus-gaap: Property Plant And Equipment By Type
us-gaap:LongTermInvestments
us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType
('us-gaap:FairValueMeasurementsRecurring', None)
Long Term Investmentsus-gaap: Fair Value By Measurement Frequency, us-gaap: Investment Type
us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
(None,)
Finite Lived Intangible Assets Netus-gaap: Finite Lived Intangible Assets By Major Class
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:StatementEquityComponents
(None,)
Stock Issued During Period Value New Issuesus-gaap: Statement Equity Components
us-gaap:AmortizationOfFinancingCosts
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
(None, 'us-gaap:SeniorNotes')
Amortization Of Financing Costsus-gaap: Debt Instrument, us-gaap: Longterm Debt Type