TWLO


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

Table of contents



us-gaap:CommonStockValue

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted

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:GeneralAndAdministrativeExpense

us-gaap:GrossProfit

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaidNet
us-gaap:DebtInstrument
us-gaap:InterestExpenseDebt

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:OperatingExpenses

us-gaap:OperatingIncomeLoss

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:ProfitLoss

us-gaap:ResearchAndDevelopmentExpense

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:StatementGeographical

us-gaap:Revenues

us-gaap:SellingAndMarketingExpense

us-gaap:Assets

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:AccountsReceivableNetCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:AmortizationOfIntangibleAssets

us-gaap:Goodwill
us-gaap:BusinessAcquisition
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass
us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:LiabilitiesCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent

us-gaap:TaxesPayableCurrent

us-gaap:LongTermDebt
us-gaap:DebtInstrument

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents, us-gaap:SubsidiarySaleOfStock
us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:StatementEquityComponents, us-gaap:SubsidiarySaleOfStock
us-gaap:SubsidiarySaleOfStock

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:AmortizationOfFinancingCosts
us-gaap:DebtInstrument

us-gaap:DepreciationDepletionAndAmortization

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ProfitLoss

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquireInvestments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:NetCashProvidedByUsedInFinancingActivities
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance

twlo:AllowanceForDoubtfulAccountPercentOfRevenue

twlo:BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesExcludingSharesHeldInEscrow
us-gaap:BusinessAcquisition
twlo:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableIncludingUnvestedPortion

twlo:CashPaidOnFinanceLeases

twlo:CommonStockDonorAdvisedFundValue

twlo:CostsRelatedToProposedInvestmentAccruedButNotPaid

twlo:CostsRelatedToPublicDebtAndEquityOfferingsAccruedButNotPaid

twlo:DebtConversionConvertedInstrumentAmountIncludingCash
us-gaap:BusinessAcquisition
twlo:EquityAwardsAssumedDuringPeriodValue

twlo:IncreaseDecreaseInOperatingLeaseLiability

twlo:LeasesRightOfUseAssetAmortization
us-gaap:BusinessAcquisition
twlo:OperatingLeaseRightOfUseAssetDecreaseDueToPurchaseAccountingAdjustment

twlo:ProceedsFromAPublicEquityOffering

twlo:ProvisionForDoubtfulAccountsAndOther

twlo:PurchaseOfPropertyAndEquipmentAccruedButNotPaid

twlo:PurchasesOfPropertyEquipmentThroughFinancingLease

twlo:SalesCreditReservePercentOfRevenue
us-gaap:Range, us-gaap:AwardType
twlo:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsFairValueOfCommonStock
us-gaap:StatementClassOfStock
twlo:StockIssuedDuringPeriodSharesSubjectToFutureVestingConditions
us-gaap:StatementClassOfStock
twlo:StockIssuedDuringPeriodSharesSubjectToFutureVestingConditionsValue
us-gaap:AwardType
twlo:StockIssuedDuringPeriodSharesSubjectToFutureVestingConditionsWeightedAverageGrantDateFairValue

twlo:StockIssuedDuringPeriodValueDonorAdvisedFund
us-gaap:StatementEquityComponents

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts
us-gaap:DebtInstrument
us-gaap:StatementEquityComponents

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs
us-gaap:DebtInstrument
us-gaap:AmortizationOfDebtDiscountPremium

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationAcquisitionRelatedCosts
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationConsiderationTransferred1
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable

us-gaap:CapitalizedComputerSoftwareAdditions

us-gaap:CapitalizedComputerSoftwareAmortization1

us-gaap:CapitalizedContractCostAmortization
us-gaap:StatementGeographical, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
us-gaap:ConcentrationRiskPercentage1

us-gaap:DebtConversionConvertedInstrumentAmount1

us-gaap:Depreciation

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
us-gaap:DebtInstrument
us-gaap:ExtinguishmentOfDebtAmount

us-gaap:FinanceLeaseInterestExpense

us-gaap:FinanceLeaseInterestPaymentOnLiability

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeaseRightOfUseAssetAmortization

us-gaap:GoodwillPurchaseAccountingAdjustments

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets

us-gaap:IncreaseDecreaseInOtherNoncurrentLiabilities

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
us-gaap:DebtInstrument
us-gaap:InterestExpenseDebtExcludingAmortization

us-gaap:InvestmentIncomeInterest

us-gaap:LeaseCost

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeasePayments

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:PaymentsOfDebtExtinguishmentCosts

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfStockIssuanceCosts

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

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

us-gaap:PaymentsToDevelopSoftware

us-gaap:ProceedsFromIssuanceInitialPublicOffering

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ProvisionForLoanLossesExpensed

us-gaap:RepaymentsOfLongTermDebtAndCapitalSecurities

us-gaap:SaleOfStockConsiderationReceivedOnTransaction
us-gaap:StatementClassOfStock
us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType
us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType
us-gaap:SaleOfStockNumberOfSharesIssuedInTransaction
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:StatementScenario, us-gaap:AwardType, us-gaap:StatementClassOfStock
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
us-gaap:TitleOfIndividual, us-gaap:AwardType, us-gaap:Vesting
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
us-gaap:AwardType
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1

us-gaap:ShortTermLeaseCost

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardGross
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised
us-gaap:StatementEquityComponents

us-gaap:UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition

us-gaap:UnrecordedUnconditionalPurchaseObligationPurchases

us-gaap:ValuationAllowancesAndReservesChargedToOtherAccounts
us-gaap:ValuationAllowancesAndReservesType

us-gaap:ValuationAllowancesAndReservesDeductions
us-gaap:ValuationAllowancesAndReservesType

us-gaap:VariableLeaseCost
us-gaap:StatementClassOfStock
dei:EntityCommonStockSharesOutstanding

twlo:AccruedCostOfRevenueCurrent

twlo:AccruedLiabilitiesAndOtherLiabilitiesCurrent

twlo:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoAmortizedCostBasis

twlo:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoFairValue
us-gaap:FairValueByMeasurementBasis

twlo:BusinessCombinationConsiderationHoldbackNonCurrent
us-gaap:AwardType, us-gaap:BusinessAcquisition
twlo:BusinessCombinationFairValueOfUnvestedEmployeeShares
us-gaap:BusinessAcquisition
twlo:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinanceLeaseLiability
us-gaap:BusinessAcquisition
twlo:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetTangibleLiabilities
us-gaap:BusinessAcquisition
twlo:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseLiability
us-gaap:BusinessAcquisition
twlo:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingRightOfUseAssets
us-gaap:DebtInstrument
twlo:DebtInstrumentConvertibleCarryingAmountOfEquityComponentNetOfIssuanceCosts

twlo:DebtInstrumentLiabilityComponent

twlo:DeferredTaxAssetLeaseLiability

twlo:DeferredTaxAssetsCappedCall

twlo:DeferredTaxAssetsDebtIssuanceCosts

twlo:DeferredTaxLiabilitiesConvertibleDebt

twlo:DeferredTaxLiabilitiesDeferredCommissions

twlo:FinanceLeaseLiabilityPaymentsDueAfterYearFour

twlo:FinancialAssetsAccumulatedGrossUnrealizedGainBeforeTax

twlo:FinancialAssetsAccumulatedGrossUnrealizedLossBeforeTax

twlo:FinancialAssetsAmortizedCostOrCarryingValue
us-gaap:FairValueByMeasurementBasis

twlo:FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour

twlo:LeaseLiability

twlo:LeaseRightOfUseAsset

twlo:LesseeFinanceLeaseAccumulatedDepreciation

twlo:LesseeFinanceLeaseLeaseNotYetCommencedObligation

twlo:LesseeOperatingLeaseAccumulatedAmortization

twlo:LesseeOperatingLeaseLeaseNotYetCommencedObligation

twlo:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour
us-gaap:IncomeTaxAuthority
twlo:OperatingLossCarryforwardsIndefiniteLived

twlo:OtherLongTermInvestmentsFairValue
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:AccruedBonusesCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementBasis, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue
us-gaap:FairValueByMeasurementBasis

us-gaap:AvailableForSaleSecuritiesDebtSecurities
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FairValueByMeasurementBasis
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount

us-gaap:BusinessCombinationContingentConsiderationLiabilityCurrent
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
us-gaap:BusinessAcquisition, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet

us-gaap:CapitalizedContractCostNet

us-gaap:CashAndCashEquivalentsFairValueDisclosure
us-gaap:CashAndCashEquivalents, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:CashAndCashEquivalents, us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementBasis

us-gaap:ContractWithCustomerLiability
us-gaap:BusinessAcquisition

us-gaap:ConvertibleDebtNoncurrent

us-gaap:DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent
us-gaap:DebtInstrument
us-gaap:DebtInstrument
us-gaap:DebtInstrumentFaceAmount
us-gaap:DebtInstrument
us-gaap:DebtInstrumentUnamortizedDiscount

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
us-gaap:FinancialInstrument
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:DeferredCostsCurrentAndNoncurrent
us-gaap:DebtInstrument
us-gaap:DeferredFinanceCostsGross
us-gaap:DebtInstrument
us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredRentCreditCurrent

us-gaap:DeferredTaxAssetsCharitableContributionCarryforwards

us-gaap:DeferredTaxAssetsGoodwillAndIntangibleAssets

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsResearch

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals

us-gaap:DeferredTaxLiabilitiesDeferredExpenseCapitalizedSoftware

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesLeasingArrangements

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesPrepaidExpenses

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
us-gaap:AwardType

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseRightOfUseAssetAccumulatedAmortization

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:IntangibleAssetsGrossExcludingGoodwill

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear
us-gaap:DebtInstrument, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:LongTermDebtFairValue

us-gaap:NotesReceivableFairValueDisclosure

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

us-gaap:OtherAccruedLiabilitiesNoncurrent

us-gaap:OtherEmployeeRelatedLiabilitiesCurrent

us-gaap:OtherLongTermInvestments
us-gaap:FairValueByMeasurementBasis

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:RevenueRemainingPerformanceObligation

us-gaap:RevenueRemainingPerformanceObligationPercentage
us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType
us-gaap:SaleOfStockPricePerShare
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested
us-gaap:AwardType
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding
us-gaap:IncomeTaxAuthority
us-gaap:TaxCreditCarryforwardAmount

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount

us-gaap:ValuationAllowancesAndReservesBalance
us-gaap:ValuationAllowancesAndReservesType

Plots across concepts


IncomeStatement
Comprehensive Income 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
Prepaid Expense And Other Assets Current
NonCurrent Assets
Other Assets Noncurrent
Liabilities
Operating Lease Liability
Current Liabilities
Other Liabilities Current
Noncurrent Liabilities
Deferred Income Tax Liabilities Net
Stockholders Equity
Retained Earnings Accumulated Deficit
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Net Income Loss
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
OperatingLeaseLiability
Operating Lease Liability Current
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four
FiniteLivedIntangibleAssets
Finite Lived Intangible Assets Accumulated Amortization
AccountsReceivable
Allowance For Doubtful Accounts Receivable Current

Tables

  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
us-gaap:CommonStockValue █▇▆▅▅▅▅▅▄▂▁▁▁▁▁▁0.1710.1640.150.1420.1390.1380.1370.1360.1260.10.0970.0960.0950.0940.0930.092NA0.087NA0.085NA
us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted NANA147.501075141.618541139.231594NA136.400739129.310641116.590513NA98.01962996.34835694.673557NA92.15676890.87330588.612804NA83.88790124.26190318.388844
us-gaap:EarningsPerShareBasic -1.24NANANA-0.68NANANANANANANANANANANANANANANANA
us-gaap:EarningsPerShareDiluted -1.24NANANA-0.68NANANANANANANANANANANANANANANANA
us-gaap:EarningsPerShareBasicAndDiluted NA-1.17-0.79-0.71-0.68-0.6599999999999999-0.64-0.72-0.31-0.48-0.28-0.25-0.25-0.20999999999999996-0.25-0.08-0.16-0.09999999999999998-0.13-0.45-0.52
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
us-gaap:AllocatedShareBasedCompensationExpense █▇▆▅▄▄▄▅▄▃▂▂▂▂▂▂▁▁▁▁▁137.155124.08989.4179.38769.02566.98668.26870.7458.32431.98622.74121.00617.5413.64614.18812.49.3858.5767.6484.9761.922
us-gaap:ComprehensiveIncomeNetOfTax ▁▂▄▅▅▅▅▅▇▇▇▇▇█▇█████-210.928-180.89-119.935-82.028-104.166-89.739-86.459-91.599-35.462-47.256-27.638-24.483-23.315-18.93-22.704-5.632-14.417-12.608-11.254-10.994NA
us-gaap:CostOfRevenue █▇▆▅▅▅▄▄▃▃▃▂▂▂▂▂▂▁▁▁▁291.684265.969217.095191.718171.333156.534136.904125.024107.08996.28877.03167.9459.58255.02248.25442.33337.28634.20531.28528.20316.827
us-gaap:GainsLossesOnExtinguishmentOfDebt -7.602NA-3.2NANANANANANANANANANANANANANANANANANA
us-gaap:GeneralAndAdministrativeExpense ▇█▄▄▄▄▃▄▄▃▂▂▂▂▂▁▂▂▂▁▁110.253128.56965.61761.25155.1751.85947.6954.54364.17634.21428.60824.21223.39318.80918.8674.7417.20314.30414.54511.6357.035
us-gaap:GrossProfit ██▆▆▅▅▄▄▄▃▃▂▂▂▂▂▂▂▁▁▁298.304282.121230.874209.131193.535174.69158.162150.015126.05108.01491.86479.81469.53460.21452.28853.53750.08647.74740.24836.30721.127
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▁▁▄▅▅▅▅▅▅▇▇▇▇█▇██████-205.652-194.717-116.266-99.629-93.814-89.091-90.289-94.612-88.224-46.738-26.972-23.856-23.592-19.116-23.031-6.599-14.257-12.595-11.138-10.881-9.543
us-gaap:IncomeTaxExpenseBenefit █▆██████▁████████████0.89-15.3660.6480.2940.9771.156-2.555-2.033-51.70.420.0840.150.137-0.1970.4220.51-0.030.0130.1160.1130.033
us-gaap:IncomeTaxesPaidNet ▅▅█▁▄▅▄▃▃▃▃▄▃1.2521.132.984-1.2790.2570.8590.4610.082-0.0340.020.2230.3030.018NANANANANANANANA
 us-gaap:InterestExpenseDebt us-gaap:DebtInstrument twlo:ConvertibleSeniorNotes0.25PercentDue2023▁▆█████▇3.4575.5486.3886.5226.5226.356.3516.185NA6.0236.0232.859NANANANANANANANANA
 us-gaap:InterestExpenseDebt us-gaap:DebtInstrument twlo:SeniorNotes3625PercentDue20291.169NANANANANANANANANANANANANANANANANANANANA
 us-gaap:InterestExpenseDebt us-gaap:DebtInstrument twlo:SeniorNotes3875PercentDue20311.234NANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss -206.542NA-116.914-99.923-94.791NA-87.734-92.579-36.503NA-27.056-24.006-23.729-18.919-23.453NANA-12.608-11.254-10.994-9.576
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings-206.542NA-116.914-99.923-94.791NA-87.734-92.579-36.503NA-27.056-24.006-23.729NANANANANANANANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▁▂▄▅▅▅▅▅▇▇▇▇▇█▇██████-206.542-179.351-116.914-99.923-94.791-90.247-87.734-92.579-36.503-47.158-27.056-24.006-23.729-18.919-23.453-7.109-14.227-12.608-11.254-10.994-9.576
us-gaap:OperatingExpenses ██▆▅▅▅▄▄▄▃▂▂▂▂▂▁▂▁▁▁▁495.643467.412343.144311.775286.231268.489252.828243.747213.638152.001116.897101.77293.79180.43276.31960.60764.84160.56751.52447.1630.587
us-gaap:OperatingIncomeLoss ▁▁▄▄▅▅▅▅▅▇▇▇▇█▇██████-197.339-185.291-112.27-102.644-92.696-93.799-94.666-93.732-87.588-43.987-25.033-21.958-24.257-20.218-24.031-7.07-14.755-12.82-11.276-10.853-9.46
us-gaap:OtherNonoperatingIncomeExpense ▂▁▄▇▅██▅▅▄▅▅▆▆▆▆▆▆▆▆▆-8.313-9.426-3.9963.015-1.1184.7084.377-0.88-0.636-2.751-1.939-1.8980.6651.1021.00.4710.4980.2250.138-0.028-0.083
us-gaap:ProfitLoss ▁▂▄▅▅▅▅▅▇▇▇▇▇█▇██-206.542-179.351-116.914-99.923-94.791-90.247-87.734-92.579-36.503-47.158-27.056-24.006-23.729-18.919-23.453-7.109-14.227NANANANA
us-gaap:ResearchAndDevelopmentExpense █▇▆▆▅▅▅▅▄▃▂▂▂▂▂▂▂▂▁▁▁174.8158.856136.652120.701114.339110.236104.48198.78377.85551.63142.3439.81137.57632.82931.67429.71426.52224.58721.10617.3699.388
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax █▇▆▆▅▅▄▄▃▃▃▂▂▂▂▂▂▂▁▁▁589.988548.09447.969400.849364.868331.224295.066275.039233.139204.302168.895147.754129.116115.236100.54295.8787.37281.95271.53364.5137.954
us-gaap:Revenues █▇▆▆▅▅▄▄▃▃▃▂▂▂▂▂▂▂▁▁▁589.988548.09447.969400.849364.868331.224295.066275.039233.139204.302168.895147.754129.116115.236100.54295.8787.37281.95271.53364.5137.954
us-gaap:SellingAndMarketingExpense █▇▆▅▅▄▄▄▃▃▂▂▂▁▁▁▁▁▁▁▁210.59179.987140.875129.823116.722106.394100.65790.42171.60759.03545.94937.74932.82227.62225.77826.15321.11617.81615.87318.15614.164
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
us-gaap:Assets █▆▅▄▄▄▄▄▃▁▁▁▁▁▁▁12242.1819487.4336723.7025290.5695166.2655150.5165110.1685109.1054120.0731028.711003.797985.848482.795449.782443.548437.947NA412.694NA336.551NA
us-gaap:Liabilities █▄▄▄▄▄▄▄▄▃▃▃▁▁▁▁1994.9851034.768961.434968.979909.74871.105825.682812.245792.56590.475569.444556.177120.25589.93688.54879.839NA83.247NA69.318NA
us-gaap:LiabilitiesAndStockholdersEquity █▆▅▄▄▄▄▄▃▁▁▁▁▁▁▁12242.1819487.4336723.7025290.5695166.2655150.5165110.1685109.1054120.0731028.711003.797985.848482.795449.782443.548437.947NA412.694NA336.551NA
us-gaap:StockholdersEquity █▇▅▄▄▄▄▄▃▁▁▁▁▁▁▁10247.1968452.6655762.2684321.594256.5254279.4114284.4864296.863327.513438.235434.353429.671362.54359.846355.0358.108NA329.447NA267.233NA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
us-gaap:AssetsCurrent █▅▅▃▃▃▃▃▂▂▂▂▁▁▁▁6093.9753372.3353569.022160.6822077.6572061.3312068.4242059.5131063.127872.948850.749884.03382.109353.265347.615345.644NA353.38NA301.166NA
us-gaap:CashAndCashEquivalentsAtCarryingValue █▄▄▂▂▂▂▂▂▂▂▂▁▁▁▁2331.774933.8851127.102475.7345.518253.66330.601535.911377.73487.215469.132493.51117.737115.28691.90692.184NA305.665252.225261.386121.821
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents █▄▄▂▂▁▂▂▂▂▂▂▁▁▁▁▁▂2331.774933.8851127.102475.7345.518253.735330.676536.773378.831505.334489.314499.015123.239120.78899.35199.629127.055314.28NANANA
us-gaap:AccountsReceivableNetCurrent ██▆▆▅▅▄▄▃▃▂▂▂▁▁▁257.854251.167203.835194.563172.865154.067131.193126.78105.14997.71280.15967.57257.3143.11337.25837.321NA26.203NA22.981NA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent █▅▄▄▄▃▃▃▂▂▂▁▁▁▂▁129.06381.37766.48162.861.40554.57155.45550.45139.08126.89325.23721.81216.79119.27926.4219.108NA21.512NA16.799NA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
us-gaap:AmortizationOfIntangibleAssets █▇▄▄▄▄▄▄▃▁▁▁▁▁▁▁45.237.320.420.620.320.00720.019.313.62.51.91.41.41.51.51.5NA0.50.10.10.1
us-gaap:Goodwill ██▄▄▄▄▄▄▄▁▁▁▁▁▁▁4635.1774595.3942291.6162291.6162291.6372296.7842283.3872283.5782277.2238.16537.10617.50618.26917.85117.40716.95NA3.565NA3.165NA
 us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass twlo:TelecommunicationLicenses█████▁4.924.924.924.924.924.37NANANANANANANANANANANANANANANA
 us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass us-gaap:Trademarks████▁▁▁▁▁▁▁▁▁▁▁▁0.2950.2950.2950.2950.2630.2630.2630.2630.2630.2630.2630.2630.2630.2630.2630.263NA0.263NANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ██▄▄▄▄▄▄▅▁▁▁▁▁▁▁951.884966.573404.422424.739445.153460.849465.255485.41503.94727.55829.78417.10818.98120.06421.27422.324NA10.268NA2.604NA
us-gaap:FiniteLivedIntangibleAssetsNet ██▄▄▄▄▄▄▅▁▁▁▁▁▁▁946.669961.358399.207419.524439.938456.184464.96485.115503.65227.26329.48916.81318.68619.76920.97922.029NA9.973NA2.341NA
us-gaap:OperatingLeaseRightOfUseAsset ██▆▆▅▅▅▅▅▁241.328258.61192.728196.647159.439156.741148.069151.946156.5110.0NANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent █▇▆▄▃▃▂▂▂▁▁▁▁▁▁▁123.932111.28292.63755.47241.43533.4826.47721.31613.0098.3866.7714.9784.242.5592.0841.498NA0.484NA0.461NA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
us-gaap:AccountsPayableCurrent █▇▅▄▃▅▃▄▃▃▂▃▃▂▁▁66.51160.04239.8827.53118.4539.09925.94929.36122.41818.49512.84223.76517.92411.1167.1174.267NA4.174NA8.72NA
us-gaap:ContractWithCustomerLiabilityCurrent █▇▃▃▃▃▃▂▂▂▁▁▁▂93.51687.03133.91629.11126.70626.36226.01524.89823.34822.97210.2089.0567.34313.797NANANANANANANA
us-gaap:LiabilitiesCurrent █▇▅▅▄▄▃▃▃▂▂▂▂▁▁▁499.924448.306326.347296.366277.037247.222216.228201.781182.339137.81125.427122.835109.30478.52775.99967.401NA73.704NA59.567NA
us-gaap:OperatingLeaseLiabilityCurrent ██▆▆▅▅▄▄▄▁46.23948.33837.86735.28729.94927.15622.21121.85821.1470.0NANANANANANANANANANANA
us-gaap:OtherAccruedLiabilitiesCurrent █▄▄▅▅▃▂▃▂▂▃▂▂▁▁▁53.82128.34331.37835.58832.71322.78518.3622.1417.54518.05422.66218.74916.3919.811.48211.091NA10.774NA7.193NA
us-gaap:OtherLiabilitiesCurrent ▆▅▄█▇▇▆▅▄▁26.625.625.328.127.527.026.226.125.222.6NANANANANANANANANANANA
us-gaap:TaxesPayableCurrent █▇▄▅▃▂▃▂▂▁51.06948.3933.62141.16129.75828.59230.15727.49926.57823.631NANANANANANANANANANANA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
us-gaap:LongTermDebt █▁1218.048302.068NANANANANANANANANANANANANANANANANANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet █▅▂▁▂▂19.03113.6849.0176.6228.3627.535NANANA5.181NANANANANANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent █▇▃▃▃▃▂▂▂▃▂▁42.62436.63319.95719.54420.96617.74714.34115.47914.03718.16915.23910.243NA11.409NANANANANA9.751NA
us-gaap:OperatingLeaseLiabilityNoncurrent ██▆▆▅▅▅▅▅▁214.456229.905166.399172.408140.12139.2134.755138.819143.950.0NANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo ▂█▁48.93760.25846.478NANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree ▅█▁44.37349.02337.884NANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour ▁█▂32.16744.43933.791NANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NA32.225NANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NA75.41NANANANANANANANANANANANANANANANANANANA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
us-gaap:StockholdersEquity █▇▅▄▄▄▄▄▃▁▁▁▁▁▁▁10247.1968452.6655762.2684321.594256.5254279.4114284.4864296.863327.513438.235434.353429.671362.54359.846355.0358.108NA329.447NA267.233NA
us-gaap:CommonStockValue █▇▆▅▅▅▅▅▄▂▁▁▁▁▁▁0.1710.1640.150.1420.1390.1380.1370.1360.1260.10.0970.0960.0950.0940.0930.092NA0.087NA0.085NA
us-gaap:AdditionalPaidInCapitalCommonStock █▇▅▄▄▄▄▄▃▁▁▁▁▁▁▁11618.6989613.2466741.9735181.3685034.2784952.9994868.2614794.1773733.241808.527757.392725.073633.46608.165584.39564.795NA516.09NA430.016NA
us-gaap:RetainedEarningsAccumulatedDeficit ▁▂▃▄▅▅▆▆▇▇▇▇████-1376.333-1169.791-990.44-873.526-773.603-678.812-588.49-500.756-408.177-371.674-324.516-297.46-273.454-250.438-231.519-208.066NA-186.73NA-162.868NA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▅▆▇█▁▅▄▄▄▃▃▃▄▃4.669.04610.58513.606-4.2895.0864.5783.3032.3231.2821.381.9622.4392.025NANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementClassOfStock,us-gaap:StatementEquityComponents,us-gaap:SubsidiarySaleOfStock us-gaap:CommonClassA,us-gaap:CommonStock,twlo:FollowonPublicOfferingDomain0.004NA0.006NANANANA0.008NANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents,us-gaap:SubsidiarySaleOfStock us-gaap:AdditionalPaidInCapital,twlo:FollowonPublicOfferingDomain1766.396NA1408.744NANANANA979.992NANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:SubsidiarySaleOfStock twlo:FollowonPublicOfferingDomain1766.4NA1408.75NANANANA980.0NANANANANANANANANANANANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue 141.542NA92.67982.55972.021NA70.73572.36159.947NA24.26622.48718.968NANANANANANANANA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▇▄▃█▇█▂▁▂▂▄█▄▃▂▄▅▃4.50514.9013.842-1.62415.53512.02415.843-4.706-9.113-4.85-6.3922.28916.9363.794-3.005-6.4892.445.672-0.694NANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁▇▄██▇▇▄▇██▇███▇▇██-1366.021-224.91-765.7173.1271.645-103.081-220.847-831.663-130.2018.983-10.285-117.177-20.9412.165-1.504-32.273-202.018-20.611-6.73NANA
us-gaap:NetCashProvidedByUsedInFinancingActivities █▁▅▁▁▁▁▄▁▁▁▂▁▁▁▁▁▁▁2759.44916.7521413.2758.6864.60314.116-1.093994.31112.81111.8297.689489.9946.3077.4354.18512.47512.34268.379-1.737NANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect █▁▅▂▂▂▁▃▁▂▂▄▂▂▂▂▁1397.889-193.217651.402130.18291.783-76.941-206.097157.942-126.50316.02-9.701375.7762.45121.437-0.278-27.426-187.225NANANANA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
us-gaap:AmortizationOfFinancingCosts 3.373NANANA0.4846.0076.0075.8415.8410.4450.4460.2110.0NANANANANANANANA
us-gaap:DepreciationDepletionAndAmortization █▇▅▅▅▅▄▄▃▂▂▁▁▁▁▁▁▁▁59.59251.5933.29832.53332.23931.13529.68528.36221.2487.8496.8545.7615.6315.3584.9264.5253.9553.0232.007NANA
us-gaap:IncreaseDecreaseInAccountsPayable ▃▇█▇▁█▄▇▆▆▃▇▇▆▆▅▅▅▅-10.2759.97411.6099.28-20.80312.922-3.9737.1451.1615.339-10.9255.8636.7034.0222.693-1.4310.149-0.603-2.331NANA
us-gaap:IncreaseDecreaseInAccountsReceivable ▁█▅███▃▇▂▇▅▅▆▄▂▄▃▂▄-5.56522.96310.57424.64323.12323.7385.09622.3170.20618.59113.59511.43614.6126.107-0.1927.4151.95-3.0216.542NANA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▇▄▃█▇█▂▁▂▂▄█▄▃▂▄▅▃4.50514.9013.842-1.62415.53512.02415.843-4.706-9.113-4.85-6.3922.28916.9363.794-3.005-6.4892.445.672-0.694NANA
us-gaap:NetIncomeLoss -206.542NA-116.914-99.923-94.791NA-87.734-92.579-36.503NA-27.056-24.006-23.729-18.919-23.453NANA-12.608-11.254-10.994-9.576
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings-206.542NA-116.914-99.923-94.791NA-87.734-92.579-36.503NA-27.056-24.006-23.729NANANANANANANANA
us-gaap:ProfitLoss ▁▂▄▅▅▅▅▅▇▇▇▇▇█▇██-206.542-179.351-116.914-99.923-94.791-90.247-87.734-92.579-36.503-47.158-27.056-24.006-23.729-18.919-23.453-7.109-14.227NANANANA
us-gaap:ShareBasedCompensation █▇▅▅▄▄▄▄▄▂▂▂▂▁▁▁▁▁▁137.155123.11489.4179.38769.02566.98668.26870.7458.32431.98622.74121.00617.5413.64614.18812.49.3858.5767.648NANA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁▇▄██▇▇▄▇██▇███▇▇██-1366.021-224.91-765.7173.1271.645-103.081-220.847-831.663-130.2018.983-10.285-117.177-20.9412.165-1.504-32.273-202.018-20.611-6.73NANA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▂▃▃▃▃█▄▂▂▁▁▁▁▁▁▁▂▃▂4.9866.5536.4556.4786.31926.37411.1125.2292.6531.620.9821.1260.940.6351.8411.8014.9718.8923.337NANA
us-gaap:PaymentsToAcquireInvestments █▂▅▂▂▂▃▅▃▁▁1640.499171.4321021.342215.791228.025269.297392.053957.574419.49866.15429.169NANANANANANANANANANA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
us-gaap:NetCashProvidedByUsedInFinancingActivities █▁▅▁▁▁▁▄▁▁▁▂▁▁▁▁▁▁▁2759.44916.7521413.2758.6864.60314.116-1.093994.31112.81111.8297.689489.9946.3077.4354.18512.47512.34268.379-1.737NANA
  2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value171000.0164000.0150000.0142000.0139000.0138000.0137000.0136000.0126000.0100000.097000.096000.095000.094000.093000.092000.087000.085000.017000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Weighted Average Number Of Share Outstanding Basic And Diluted

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted


Weighted
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302015-06-30
Value147141139136129116989694929088832418
Percentage of WeightedAverageNumberOfShareOutstandingBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-03-312020-03-31
Value-1.24-0.68
Percentage of EarningsPerShareBasic100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-03-312020-03-31
Value-1.24-0.68
Percentage of EarningsPerShareDiluted100.0100.0

Earnings Per Share Basic And Diluted

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:EarningsPerShareBasicAndDiluted


Earnings
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value-1.17-0.79-0.71-0.68-0.66-0.64-0.72-0.31-0.48-0.28-0.25-0.25-0.21-0.25-0.08-0.16-0.1-0.13-0.45-0.52
Percentage of EarningsPerShareBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value13712489796966687058312221171314129.3858.5767.6484.9761.922
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax23.20.020.019.818.90.023.125.725.00.013.514.213.60.014.112.910.70.010.77.75.1

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:IncomeStatementLocation

us-gaap:CostOfSales


Allocated
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value2.7172.642.2372.1431.8372.0171.6741.6231.8090.3540.2840.2660.2220.190.180.1420.1380.1560.0840.0280.014
Percentage of AllocatedShareBasedCompensationExpense2.02.12.52.72.73.02.52.33.11.11.21.31.31.41.31.11.51.81.10.60.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.00.50.50.50.00.60.60.80.00.20.20.20.00.20.10.20.00.10.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CostOfSales0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:GeneralAndAdministrativeExpense


Allocated
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value3533141414131620198.3936.3325.9425.5874.4744.9124.1852.7681.422.3911.4530.599
Percentage of AllocatedShareBasedCompensationExpense26.127.116.018.020.320.823.629.533.326.227.828.331.932.834.633.829.516.631.329.231.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.10.03.23.63.80.05.57.68.30.03.74.04.30.04.94.43.20.03.32.31.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:GeneralAndAdministrativeExpense0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ResearchAndDevelopmentExpense


Allocated
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value56534639333234332513109.7497.8726.1216.4935.714.4845.313.7412.3790.796
Percentage of AllocatedShareBasedCompensationExpense41.543.551.850.248.148.750.347.643.443.147.846.444.944.945.846.047.861.948.947.841.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.70.010.39.99.10.011.612.310.90.06.46.66.10.06.56.05.10.05.23.72.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ResearchAndDevelopmentExpense0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:SellingAndMarketingExpense


Allocated
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value4133262319181614119.4625.2465.0493.8592.8612.6032.3631.9951.691.4321.1160.513
Percentage of AllocatedShareBasedCompensationExpense30.427.329.729.128.927.523.620.620.129.623.124.022.021.018.319.121.319.718.722.426.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.10.05.95.85.50.05.55.35.00.03.13.43.00.02.62.52.30.02.01.71.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:SellingAndMarketingExpense0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-210930000.0-180890000.0-119940000.0-82028000.0-104170000.0-89739000.0-86459000.0-91599000.0-35462000.0-47256000.0-27638000.0-24483000.0-23315000.0-18930000.0-22704000.0-5632000.0-14417000.0-12608000.0-11254000.0-10994000.0
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-35.80.0-26.8-20.5-28.50.0-29.3-33.3-15.20.0-16.4-16.6-18.10.0-22.6-5.9-16.50.0-15.7-17.0

Cost Of Revenue

us-gaap:CostOfRevenue

us-gaap:CostOfRevenue


Cost
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value291265217191171156136125107967767595548423734312816
Percentage of CostOfRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax49.40.048.547.847.00.046.445.545.90.045.646.046.10.048.044.242.70.043.743.744.3

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2021-03-312020-09-30
Value-7602000.0-3200000.0
Percentage of GainsLossesOnExtinguishmentOfDebt100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.3-0.7

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


General
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value110128656155514754643428242318184.74171414117.035
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.70.014.615.315.10.016.219.827.50.016.916.418.10.018.84.919.70.020.318.018.5

Gross Profit

us-gaap:GrossProfit

us-gaap:GrossProfit


Gross
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value2982822302091931741581501261089179696052535047403621
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax50.60.051.552.253.00.053.654.554.10.054.454.053.90.052.055.857.30.056.356.355.7

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value-205650000.0-194720000.0-116270000.0-99629000.0-93814000.0-89091000.0-90289000.0-94612000.0-88224000.0-46738000.0-26972000.0-23856000.0-23592000.0-19116000.0-23031000.0-6599000.0-14257000.0-12595000.0-11138000.0-10881000.0-9543000.0
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-34.90.0-26.0-24.9-25.70.0-30.6-34.4-37.80.0-16.0-16.1-18.30.0-22.9-6.9-16.30.0-15.6-16.9-25.1

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value890000.0-15366000.0648000.0294000.0977000.01156000.0-2555000.0-2033000.0-51700000.0420000.084000.0150000.0137000.0-197000.0422000.0510000.0-30000.013000.0116000.0113000.033000.0
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.00.10.10.30.0-0.9-0.7-22.20.00.00.10.10.00.40.5-0.00.00.20.20.1

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1252000.01130000.02984000.0-1279000.0257000.0859000.0461000.082000.0-34000.020000.0223000.0303000.018000.0
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.00.7-0.30.10.00.20.0-0.00.00.10.20.0

Interest Expense Debt

us-gaap:InterestExpenseDebt us-gaap:DebtInstrument

us-gaap:InterestExpenseDebt

twlo:ConvertibleSeniorNotes0.25PercentDue2023


Interest
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value3.4575.5486.3886.5226.5226.356.3516.1856.0236.0232.859
Percentage of InterestExpenseDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.60.01.41.61.80.02.22.20.03.61.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax twlo:ConvertibleSeniorNotes0.25PercentDue20230.00.00.00.00.00.00.00.00.00.00.0

twlo:SeniorNotes3625PercentDue2029


Interest
Period End2021-03-31
Value1.169
Percentage of InterestExpenseDebt33.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax twlo:SeniorNotes3625PercentDue20290.0

twlo:SeniorNotes3875PercentDue2031


Interest
Period End2021-03-31
Value1.234
Percentage of InterestExpenseDebt35.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax twlo:SeniorNotes3875PercentDue20310.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302015-06-30
Value-206540000.0-116910000.0-99923000.0-94791000.0-87734000.0-92579000.0-36503000.0-27056000.0-24006000.0-23729000.0-18919000.0-23453000.0-12608000.0-11254000.0-10994000.0-9576000.0
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-35.0-26.1-24.9-26.0-29.7-33.7-15.7-16.0-16.2-18.40.0-23.30.0-15.7-17.0-25.2

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-206540000.0-116910000.0-99923000.0-94791000.0-87734000.0-92579000.0-36503000.0-27056000.0-24006000.0-23729000.0
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-35.0-26.1-24.9-26.0-29.7-33.7-15.7-16.0-16.2-18.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value-206.542-179.351-116.914-99.923-94.791-90.247-87.734-92.579-36.503-47.158-27.056-24.006-23.729-18.919-23.453-7.109-14.227-12.608-11.254-10.994-9.576
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-35.00.0-26.1-24.9-26.00.0-29.7-33.7-15.70.0-16.0-16.2-18.40.0-23.3-7.4-16.30.0-15.7-17.0-25.2

Operating Expenses

us-gaap:OperatingExpenses

us-gaap:OperatingExpenses


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value495467343311286268252243213152116101938076606460514730
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax84.00.076.677.878.40.085.788.691.60.069.268.972.60.075.963.274.20.072.073.180.6

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value-197340000.0-185290000.0-112270000.0-102640000.0-92696000.0-93799000.0-94666000.0-93732000.0-87588000.0-43987000.0-25033000.0-21958000.0-24257000.0-20218000.0-24031000.0-7070000.0-14755000.0-12820000.0-11276000.0-10853000.0-9460000.0
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-33.40.0-25.1-25.6-25.40.0-32.1-34.1-37.60.0-14.8-14.9-18.80.0-23.9-7.4-16.90.0-15.8-16.8-24.9

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value-8313000.0-9426000.0-3996000.03015000.0-1118000.04708000.04377000.0-880000.0-636000.0-2751000.0-1939000.0-1898000.0665000.01102000.01000000.0471000.0498000.0225000.0138000.0-28000.0-83000.0
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.40.0-0.90.8-0.30.01.5-0.3-0.30.0-1.1-1.30.50.01.00.50.60.00.2-0.0-0.2

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-206540000.0-179350000.0-116910000.0-99923000.0-94791000.0-90247000.0-87734000.0-92579000.0-36503000.0-47158000.0-27056000.0-24006000.0-23729000.0-18919000.0-23453000.0-7109000.0-14227000.0
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-35.00.0-26.1-24.9-26.00.0-29.7-33.7-15.70.0-16.0-16.2-18.40.0-23.3-7.4-16.3

Research And Development Expense

us-gaap:ResearchAndDevelopmentExpense

us-gaap:ResearchAndDevelopmentExpense


Research
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value174158136120114110104987751423937323129262421179.388
Percentage of ResearchAndDevelopmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax29.60.030.530.131.30.035.435.933.40.025.126.929.10.031.531.030.40.029.526.924.7

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value589548447400364331295275233204168147129115100958781716437
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical

country:US


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value421400328292261236210194166149125111988676757068605432
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax71.473.073.272.971.871.371.570.971.473.074.475.376.475.276.378.380.283.584.684.585.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax71.473.073.272.971.871.371.570.971.473.074.475.376.475.276.378.380.283.584.684.585.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:US100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NonUs


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value1681471191081039484806655433630282320171310105.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax28.627.026.827.128.228.728.529.128.627.025.624.723.624.823.721.719.816.515.415.515.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax28.627.026.827.128.228.728.529.128.627.025.624.723.624.823.721.719.816.515.415.515.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NonUs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value589548447400364331295275233204168147129115100958781716437
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Selling And Marketing Expense

us-gaap:SellingAndMarketingExpense

us-gaap:SellingAndMarketingExpense


Selling
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value2101791401291161061009071594537322725262117151814
Percentage of SellingAndMarketingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax35.732.831.432.432.032.134.132.930.728.927.225.525.424.025.627.324.221.722.228.137.3

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value122429487672352905166515051105109412010281003985482449443437412336157
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value19941034961968909871825812792590569556120898879836940
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets16.310.914.318.317.616.916.215.919.257.456.756.424.920.020.018.220.220.626.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value122429487672352905166515051105109412010281003985482449443437412336157
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-312014-12-31
Value102478452576243214256427942844296332743843442936235935535832926711631
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets83.789.185.781.782.483.183.884.180.842.643.343.675.180.080.081.879.879.474.00.0

us-gaap:StockholdersEquity us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:CommonClassA, us-gaap:CommonStock


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value0.1580.1510.1380.130.1260.1240.1230.120.1090.080.0750.0750.0710.070.051
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassA us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassB, us-gaap:CommonStock


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value0.0130.0130.0120.0120.0130.0140.0140.0160.0170.020.0220.0210.0240.0240.0360.0170.017
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassB us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value4.669.0461013-4.2895.0864.5783.3032.3231.2821.381.9622.4392.0250.0
Percentage of StockholdersEquity0.00.10.20.3-0.10.10.10.10.10.30.30.50.70.60.0
Percentage of Assets0.00.10.20.3-0.10.10.10.10.10.10.10.20.50.50.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value1161896136741518150344952486847943733808757725633608516228.92
Percentage of StockholdersEquity113.4113.7117.0119.9118.3115.7113.6111.6112.2184.5174.4168.8174.7169.0156.719.028.6
Percentage of Assets94.9101.3100.397.997.496.295.393.890.678.675.573.5131.2135.2125.114.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value-1376.333-1169.791-990.44-873.526-773.603-678.812-588.49-500.756-408.177-371.674-324.516-297.46-273.454-250.438-186.73-145.406-89.434
Percentage of StockholdersEquity-13.4-13.8-17.2-20.2-18.2-15.9-13.7-11.7-12.3-84.8-74.7-69.2-75.4-69.6-56.7-124.7-286.7
Percentage of Assets-11.2-12.3-14.7-16.5-15.0-13.2-11.5-9.8-9.9-36.1-32.3-30.2-56.6-55.7-45.2-92.30.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value609333723569216020772061206820591063872850884382353347345353301136
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets49.835.553.140.840.240.040.540.325.884.984.889.779.178.578.478.985.689.586.6

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302015-12-312015-06-302014-12-31
Value23319331127475345253330535377487469493117115919230525226110812132
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets19.09.816.89.06.74.96.510.59.247.446.750.124.425.620.721.074.10.077.769.10.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value233193311274753452533305363785054894991231209999127314110
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets19.09.816.89.06.74.96.510.59.249.148.750.625.526.922.422.70.076.269.8

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value25725120319417215413112610597806757433737262219
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.12.63.03.73.33.02.62.52.69.58.06.911.99.68.48.56.36.812.1

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent


Prepaid
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value12981666261545550392625211619261921168.546
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.10.91.01.21.21.11.11.00.92.62.52.23.54.36.04.45.25.05.4

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302015-06-30
Value4537202020202019132.51.91.41.41.51.51.50.50.10.10.1
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value463545952291229122912296228322832277383717181717163.5653.1653.165
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets37.948.434.143.344.444.644.744.755.33.73.71.83.84.03.93.90.90.92.0

us-gaap:Goodwill us-gaap:BusinessAcquisition

twlo:OtherAcquisitions


Goodwillus-gaap:
Period End2020-12-312019-12-31
Value8.823
Percentage of Goodwill0.21.0
Percentage of Assets0.10.5
Percentage of Assets twlo:OtherAcquisitions0.00.0

twlo:SegmentioInc


Goodwillus-gaap:
Period End2020-12-31
Value2294
Percentage of Goodwill49.9
Percentage of Assets24.2
Percentage of Assets twlo:SegmentioInc0.0

twlo:SendgridInc


Goodwillus-gaap:
Period End2020-12-312019-12-312019-09-302019-02-28
Value2235223522372239
Percentage of Goodwill48.697.398.00.0
Percentage of Assets23.643.443.80.0
Percentage of Assets twlo:SendgridInc0.00.00.00.0

twlo:ValueFirst


Goodwillus-gaap:
Period End2021-03-12
Value36
Percentage of Goodwill0.0
Percentage of Assets0.0
Percentage of Assets twlo:ValueFirst0.0

Indefinite Lived Intangible Assets Excluding Goodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

twlo:TelecommunicationLicenses


Indefinite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value4920000.04920000.04920000.04920000.04920000.04370000.0
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.10.10.10.10.1
Percentage of Assets twlo:TelecommunicationLicenses0.00.00.00.00.00.0

us-gaap:Trademarks


Indefinite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value295000.0295000.0295000.0295000.0263000.0263000.0263000.0263000.0263000.0263000.0263000.0263000.0263000.0263000.0263000.0263000.0263000.0
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill6.06.06.06.05.36.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.1
Percentage of Assets us-gaap:Trademarks0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value95196640442444546046548550327291718202122102.6042.292
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.810.26.08.08.68.99.19.512.22.73.01.73.94.54.85.12.50.81.5

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value946961399419439456464485503272916181920229.9732.3412.292
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.710.15.97.98.58.99.19.512.22.72.91.73.94.44.75.02.40.71.5

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

twlo:SupplierRelationships


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value8.611.3121.6642.0132.352.8241.2941.4561.5891.7231.8882.0422.3012.3812.492.546
Percentage of FiniteLivedIntangibleAssetsNet0.90.10.40.50.50.60.30.30.36.36.412.112.312.011.911.6
Percentage of Assets0.10.00.00.00.00.10.00.00.00.20.20.20.50.50.60.6
Percentage of Assets twlo:SupplierRelationships0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CustomerRelationships


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value3163191381451521551581651705.7426.4455.496.0516.1536.3226.3550.2520.2920.332
Percentage of FiniteLivedIntangibleAssetsNet33.433.334.734.734.634.234.134.033.821.121.932.732.431.130.128.82.512.514.5
Percentage of Assets2.63.42.12.72.93.03.13.24.10.60.60.61.31.41.41.50.10.10.2
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DevelopedTechnologyRights


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value59261124225526727828529831017187.2948.5119.46510118.260.7140.93
Percentage of FiniteLivedIntangibleAssetsNet62.563.660.860.860.861.161.461.461.665.064.443.445.547.950.252.282.830.540.6
Percentage of Assets4.86.43.64.85.25.45.65.87.51.71.90.71.82.12.42.62.00.20.6
Percentage of Assets us-gaap:DevelopedTechnologyRights0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OrderOrProductionBacklog


Finite
Period End2021-03-312020-12-31
Value5.8338.333
Percentage of FiniteLivedIntangibleAssetsNet0.60.9
Percentage of Assets0.00.1
Percentage of Assets us-gaap:OrderOrProductionBacklog0.00.0

us-gaap:Patents


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value3.0942.9872.9052.7922.6172.4452.2742.2152.0622.0862.1661.9871.8231.771.6441.6321.4571.3160.996
Percentage of FiniteLivedIntangibleAssetsNet0.30.30.70.70.60.50.50.50.47.77.311.89.89.07.87.414.656.243.5
Percentage of Assets0.00.00.00.10.10.00.00.00.10.20.20.20.40.40.40.40.40.40.6
Percentage of Assets us-gaap:Patents0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TradeNames


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312016-12-312016-06-302015-12-31
Value2117131415161718190.00.0040.0190.034
Percentage of FiniteLivedIntangibleAssetsNet2.21.83.33.43.53.63.73.83.80.00.00.81.5
Percentage of Assets0.20.20.20.30.30.30.30.40.50.00.00.00.0
Percentage of Assets us-gaap:TradeNames0.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2412581921961591561481511560.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets2.02.72.93.73.13.02.93.03.80.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value123111925541332621138.3866.7714.9784.242.5592.0841.4980.4840.4610.356
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.01.21.41.00.80.70.50.40.30.80.70.50.90.60.50.30.10.10.2

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value66603927183925292218122317117.1174.2674.1748.722.299
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.60.60.50.40.80.50.60.51.81.32.43.72.51.61.01.02.61.5

Contract With Customer Liability Current

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:ContractWithCustomerLiabilityCurrent


Contract
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value93873329262626242322109.0567.34313
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.90.50.60.50.50.50.50.62.21.00.91.53.1

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value499448326296277247216201182137125122109787567735940
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.14.74.95.65.44.84.23.94.413.412.512.522.617.517.115.417.917.725.7

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value4648373529272221210.0
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.40.50.60.70.60.50.40.40.50.0

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value532831353222182217182218169.81111107.1935.064
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.30.50.70.60.40.40.40.41.82.31.93.42.22.62.52.62.13.2

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value26252528272726262522
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.30.40.50.50.50.50.50.62.2

Taxes Payable Current

us-gaap:TaxesPayableCurrent

us-gaap:TaxesPayableCurrent


Taxes
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value51483341292830272623
Percentage of TaxesPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.50.50.80.60.60.60.50.62.3

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-03-312020-12-31
Value1218302
Percentage of LongTermDebt100.0100.0
Percentage of Assets9.93.2

us-gaap:LongTermDebt us-gaap:DebtInstrument

twlo:ConvertibleSeniorNotes0.25PercentDue2023


Long
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value232302432470464458452446440434
Percentage of LongTermDebt19.1100.00.00.00.00.00.00.00.00.0
Percentage of Assets1.93.26.48.99.08.98.88.710.742.2
Percentage of Assets twlo:ConvertibleSeniorNotes0.25PercentDue20230.00.00.00.00.00.00.00.00.00.0

twlo:SeniorNotes3625PercentDue2029


Long
Period End2021-03-31
Value492
Percentage of LongTermDebt40.4
Percentage of Assets4.0
Percentage of Assets twlo:SeniorNotes3625PercentDue20290.0

twlo:SeniorNotes3875PercentDue2031


Long
Period End2021-03-31
Value492
Percentage of LongTermDebt40.4
Percentage of Assets4.0
Percentage of Assets twlo:SeniorNotes3875PercentDue20310.0

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value19139.0176.6228.3627.5355.181
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.10.10.10.20.10.5

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-06-302015-12-31
Value423619192017141514181510119.7510.448
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.40.30.40.40.30.30.30.31.81.51.02.52.90.3

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2142291661721401391341381430.0
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets1.82.42.53.32.72.72.62.73.50.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2021-03-312020-12-312020-09-30
Value486046
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0
Percentage of Assets0.40.60.7

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2021-03-312020-12-312020-09-30
Value444937
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0100.0
Percentage of Assets0.40.50.6

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2021-03-312020-12-312020-09-30
Value324433
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0100.0
Percentage of Assets0.30.50.5

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value32
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.3

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value75
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets0.8

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312019-01-01
Value260278204166156160165132
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.12.93.03.23.13.14.00.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2021-03-312020-12-312020-09-30
Value300321237
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0100.0
Percentage of Assets2.53.43.5

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2021-03-312020-12-312020-09-30
Value394333
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0
Percentage of Assets0.30.50.5

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-312014-12-31
Value102478452576243214256427942844296332743843442936235935535832926711631
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets83.789.185.781.782.483.183.884.180.842.643.343.675.180.080.081.879.879.474.00.0

us-gaap:StockholdersEquity us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:CommonClassA, us-gaap:CommonStock


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value0.1580.1510.1380.130.1260.1240.1230.120.1090.080.0750.0750.0710.070.051
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassA us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassB, us-gaap:CommonStock


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value0.0130.0130.0120.0120.0130.0140.0140.0160.0170.020.0220.0210.0240.0240.0360.0170.017
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassB us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value4.669.0461013-4.2895.0864.5783.3032.3231.2821.381.9622.4392.0250.0
Percentage of StockholdersEquity0.00.10.20.3-0.10.10.10.10.10.30.30.50.70.60.0
Percentage of Assets0.00.10.20.3-0.10.10.10.10.10.10.10.20.50.50.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value1161896136741518150344952486847943733808757725633608516228.92
Percentage of StockholdersEquity113.4113.7117.0119.9118.3115.7113.6111.6112.2184.5174.4168.8174.7169.0156.719.028.6
Percentage of Assets94.9101.3100.397.997.496.295.393.890.678.675.573.5131.2135.2125.114.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value-1376.333-1169.791-990.44-873.526-773.603-678.812-588.49-500.756-408.177-371.674-324.516-297.46-273.454-250.438-186.73-145.406-89.434
Percentage of StockholdersEquity-13.4-13.8-17.2-20.2-18.2-15.9-13.7-11.7-12.3-84.8-74.7-69.2-75.4-69.6-56.7-124.7-286.7
Percentage of Assets-11.2-12.3-14.7-16.5-15.0-13.2-11.5-9.8-9.9-36.1-32.3-30.2-56.6-55.7-45.2-92.30.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value171000.0164000.0150000.0142000.0139000.0138000.0137000.0136000.0126000.0100000.097000.096000.095000.094000.093000.092000.087000.085000.017000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value116189613674151815034495248684794373380875772563360858456451643022
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets94.9101.3100.397.997.496.295.393.890.678.675.573.5131.2135.2131.8129.0125.1127.814.0

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value-1376300000.0-1169800000.0-990440000.0-873530000.0-773600000.0-678810000.0-588490000.0-500760000.0-408180000.0-371670000.0-324520000.0-297460000.0-273450000.0-250440000.0-231520000.0-208070000.0-186730000.0-162870000.0-145410000.0
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-11.2-12.3-14.7-16.5-15.0-13.2-11.5-9.8-9.9-36.1-32.3-30.2-56.6-55.7-52.2-47.5-45.2-48.4-92.3

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value4.669.0461013-4.2895.0864.5783.3032.3231.2821.381.9622.4392.025
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.10.20.3-0.10.10.10.10.10.10.10.20.50.5

Stock Issued During Period Value New Issues

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents, us-gaap:SubsidiarySaleOfStock

us-gaap:StockIssuedDuringPeriodValueNewIssues

us-gaap:CommonClassA, us-gaap:CommonStock, twlo:FollowonPublicOfferingDomain


Stock
Period End2021-03-312020-09-302019-06-30
Value0.0040.0060.008
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.0100.0
Percentage of Assets0.00.00.0
Percentage of Assets us-gaap:CommonClassA us-gaap:CommonStock twlo:FollowonPublicOfferingDomain0.00.00.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents, us-gaap:SubsidiarySaleOfStock

us-gaap:AdditionalPaidInCapital, twlo:FollowonPublicOfferingDomain


Stock
Period End2021-03-312020-09-302019-06-30
Value17661408979
Percentage of StockIssuedDuringPeriodValueNewIssues44159900.023479066.712249900.0
Percentage of Assets0.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital twlo:FollowonPublicOfferingDomain0.00.00.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:SubsidiarySaleOfStock

twlo:FollowonPublicOfferingDomain


Stock
Period End2021-03-312020-09-302019-06-30
Value17661408980
Percentage of StockIssuedDuringPeriodValueNewIssues44160000.023479166.712250000.0
Percentage of Assets0.00.00.0
Percentage of Assets twlo:FollowonPublicOfferingDomain0.00.00.0

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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value141928272707259242218
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value141928272707259242218
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value4.505143.842-1.624151215-4.706-9.113-4.85-6.3922.289163.794-3.005-6.4892.445.672-0.694
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.82.70.9-0.44.33.65.4-1.7-3.9-2.4-3.81.513.13.3-3.0-6.82.86.9-1.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-1366.021-224.91-765.717371-103.081-220.847-831.663-130.2018.983-10.285-117.177-20.9412-1.504-32.273-202.018-20.611-6.73
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-231.5-41.0-170.918.219.6-31.1-74.8-302.4-55.84.4-6.1-79.3-16.210.6-1.5-33.7-231.2-25.2-9.4

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value2759161413584.60314-1.09399412117.6894896.3077.4354.185121268-1.737
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax467.73.1315.514.61.34.3-0.4361.55.55.84.6331.64.96.54.213.014.183.4-2.4

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1397-193.21765113091-76.941-206.097157-126.50316-9.7013752.45121-0.278-27.426-187.225
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax236.9-35.3145.432.525.2-23.2-69.857.4-54.37.8-5.7254.31.918.6-0.3-28.6-214.3

Amortization Of Financing Costs

us-gaap:AmortizationOfFinancingCosts

us-gaap:AmortizationOfFinancingCosts


Amortization
Period End2021-03-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3.3730.4846.0076.0075.8415.8410.4450.4460.2110.0
Percentage of AmortizationOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:AmortizationOfFinancingCosts us-gaap:DebtInstrument

twlo:ConvertibleSeniorNotes0.25PercentDue2023


Amortization
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.2590.4190.4760.4840.4840.4710.4710.4580.4580.4450.4460.211
Percentage of AmortizationOfFinancingCosts7.70.00.00.0100.07.87.87.87.8100.0100.0100.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value5951333232312928217.8496.8545.7615.6315.3584.9264.5253.9553.0232.007
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-10.2759.974119.28-20.80312-3.9737.1451.1615.339-10.9255.8636.7034.0222.693-1.4310.149-0.603-2.331
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-5.56522102423235.096220.206181311146.107-0.1927.4151.95-3.0216.542
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value4.505143.842-1.624151215-4.706-9.113-4.85-6.3922.289163.794-3.005-6.4892.445.672-0.694
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.82.70.9-0.44.33.65.4-1.7-3.9-2.4-3.81.513.13.3-3.0-6.82.86.9-1.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302015-06-30
Value-206540000.0-116910000.0-99923000.0-94791000.0-87734000.0-92579000.0-36503000.0-27056000.0-24006000.0-23729000.0-18919000.0-23453000.0-12608000.0-11254000.0-10994000.0-9576000.0
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-35.0-26.1-24.9-26.0-29.7-33.7-15.7-16.0-16.2-18.4-16.4-23.3-15.4-15.7-17.0-25.2

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-206540000.0-116910000.0-99923000.0-94791000.0-87734000.0-92579000.0-36503000.0-27056000.0-24006000.0-23729000.0
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-35.0-26.1-24.9-26.0-29.7-33.7-15.7-16.0-16.2-18.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-206540000.0-179350000.0-116910000.0-99923000.0-94791000.0-90247000.0-87734000.0-92579000.0-36503000.0-47158000.0-27056000.0-24006000.0-23729000.0-18919000.0-23453000.0-7109000.0-14227000.0
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-35.0-32.7-26.1-24.9-26.0-27.2-29.7-33.7-15.7-23.1-16.0-16.2-18.4-16.4-23.3-7.4-16.3

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value13712389796966687058312221171314129.3858.5767.648
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-1366.021-224.91-765.717371-103.081-220.847-831.663-130.2018.983-10.285-117.177-20.9412-1.504-32.273-202.018-20.611-6.73
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-231.5-41.0-170.918.219.6-31.1-74.8-302.4-55.84.4-6.1-79.3-16.210.6-1.5-33.7-231.2-25.2-9.4

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value4.9866.5536.4556.4786.31926115.2292.6531.620.9821.1260.940.6351.8411.8014.9718.8923.337
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments To Acquire Investments

us-gaap:PaymentsToAcquireInvestments

us-gaap:PaymentsToAcquireInvestments


Payments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value164017110212152282693929574196629
Percentage of PaymentsToAcquireInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

twlo:Syniverse


Payments
Period End2021-02-28
Value750
Percentage of PaymentsToAcquireInvestments0.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value2759161413584.60314-1.09399412117.6894896.3077.4354.185121268-1.737
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax467.73.1315.514.61.34.3-0.4361.55.55.84.6331.64.96.54.213.014.183.4-2.4

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

twlo:EmployeeAndNonemployeeStockOption


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value61.7851.7146.0244.237.2328.7928.8328.2126.5316.0714.6914.2913.2110.319.899.546.146.015.31
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value137.5355.1812.4520.002
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value3371834011126.846
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value19149159.445121.6791.024
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value677255147784935
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0

twlo:AllowanceForDoubtfulAccountPercentOfRevenue

twlo:AllowanceForDoubtfulAccountPercentOfRevenue


Allowance
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2.00.030.0200.020.020.0200.02
Percentage of AllowanceForDoubtfulAccountPercentOfRevenue100.0100.0100.00.0100.0100.0100.00.0100.0

twlo:BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesExcludingSharesHeldInEscrow

twlo:BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesExcludingSharesHeldInEscrow


Business
Period End2020-11-30
Value9300000.0
Percentage of BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesExcludingSharesHeldInEscrow100.0

twlo:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableIncludingUnvestedPortion us-gaap:BusinessAcquisition

twlo:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableIncludingUnvestedPortion

twlo:SegmentioInc


Business
Period End2020-11-30
Value2600
Percentage of BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableIncludingUnvestedPortion100.0

twlo:CashPaidOnFinanceLeases

twlo:CashPaidOnFinanceLeases


Cash
Period End2021-03-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value263000.0198000.0884000.01069000.0189000.0148000.0741000.0000
Percentage of CashPaidOnFinanceLeases100.0100.0100.0100.0100.0100.0100.00.00.00.0

twlo:CommonStockDonorAdvisedFundValue

twlo:CommonStockDonorAdvisedFundValue


Common
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value9.4056.5635.7573.9722.7010.00.0
Percentage of CommonStockDonorAdvisedFundValue100.0100.0100.0100.0100.00.00.0

twlo:CostsRelatedToProposedInvestmentAccruedButNotPaid

twlo:CostsRelatedToProposedInvestmentAccruedButNotPaid


Costs
Period End2021-03-31
Value3262000.0
Percentage of CostsRelatedToProposedInvestmentAccruedButNotPaid100.0

twlo:CostsRelatedToPublicDebtAndEquityOfferingsAccruedButNotPaid

twlo:CostsRelatedToPublicDebtAndEquityOfferingsAccruedButNotPaid


Costs
Period End2021-03-31
Value2681000.0
Percentage of CostsRelatedToPublicDebtAndEquityOfferingsAccruedButNotPaid100.0

twlo:DebtConversionConvertedInstrumentAmountIncludingCash

twlo:DebtConversionConvertedInstrumentAmountIncludingCash


Debt
Period End2021-03-312020-09-30
Value422172
Percentage of DebtConversionConvertedInstrumentAmountIncludingCash100.0100.0

twlo:EquityAwardsAssumedDuringPeriodValue us-gaap:BusinessAcquisition

twlo:EquityAwardsAssumedDuringPeriodValue

twlo:SegmentioInc


Equity
Period End2020-11-30
Value39
Percentage of EquityAwardsAssumedDuringPeriodValue100.0

twlo:IncreaseDecreaseInOperatingLeaseLiability

twlo:IncreaseDecreaseInOperatingLeaseLiability


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-12053000.0-8777000.0-8821000.0-9332000.0-7008000.0-5741000.0-6030000.0-7583000.0-1784000.00000
Percentage of IncreaseDecreaseInOperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

twlo:LeasesRightOfUseAssetAmortization

twlo:LeasesRightOfUseAssetAmortization


Leases
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value11119.4369.7818.0236.4616.0255.8534.854
Percentage of LeasesRightOfUseAssetAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0

twlo:OperatingLeaseRightOfUseAssetDecreaseDueToPurchaseAccountingAdjustment us-gaap:BusinessAcquisition

twlo:OperatingLeaseRightOfUseAssetDecreaseDueToPurchaseAccountingAdjustment

twlo:SegmentioInc


Operating
Period End2020-11-30
Value6400000.0
Percentage of OperatingLeaseRightOfUseAssetDecreaseDueToPurchaseAccountingAdjustment100.0

twlo:ProceedsFromAPublicEquityOffering

twlo:ProceedsFromAPublicEquityOffering


Proceeds
Period End2021-03-31
Value1766
Percentage of ProceedsFromAPublicEquityOffering100.0

twlo:ProvisionForDoubtfulAccountsAndOther

twlo:ProvisionForDoubtfulAccountsAndOther


Provision
Period End2021-03-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3.3814.2611.1690.6760.685-0.3041.4591.1111.140.375
Percentage of ProvisionForDoubtfulAccountsAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

twlo:PurchaseOfPropertyAndEquipmentAccruedButNotPaid

twlo:PurchaseOfPropertyAndEquipmentAccruedButNotPaid


Purchase
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value3494000.05806000.0-10055000.05510000.03309000.0-3652000.01821000.0
Percentage of PurchaseOfPropertyAndEquipmentAccruedButNotPaid100.0100.0100.0100.0100.0100.0100.0

twlo:PurchasesOfPropertyEquipmentThroughFinancingLease

twlo:PurchasesOfPropertyEquipmentThroughFinancingLease


Purchases
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value5.2665.06120-5.3660.02.707-10.4750.0132.4780.00.00.0
Percentage of PurchasesOfPropertyEquipmentThroughFinancingLease100.0100.0100.0100.00.0100.0100.00.0100.0100.00.00.00.0

twlo:SalesCreditReservePercentOfRevenue

twlo:SalesCreditReservePercentOfRevenue


Sales
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2.00.030.0300.020.010.01-0.010.02
Percentage of SalesCreditReservePercentOfRevenue100.0100.0100.00.0100.0100.0100.0100.0100.0

twlo:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsFairValueOfCommonStock us-gaap:Range, us-gaap:AwardType

twlo:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsFairValueOfCommonStock

srt:Maximum, us-gaap:EmployeeStockOption


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value409.2109.820191.9126.700.05-0.05130.713.9318.58
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsFairValueOfCommonStock100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0

srt:Minimum, us-gaap:EmployeeStockOption


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value377.6-0.030108.4117.9-7.6-0.020.02111.30.01-0.01
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsFairValueOfCommonStock92.3-0.00.056.593.10.0-40.0-40.085.20.1-0.1

twlo:StockIssuedDuringPeriodSharesSubjectToFutureVestingConditions us-gaap:StatementClassOfStock

twlo:StockIssuedDuringPeriodSharesSubjectToFutureVestingConditions

us-gaap:CommonClassA


Stock
Period End2020-11-30
Value258550.0
Percentage of StockIssuedDuringPeriodSharesSubjectToFutureVestingConditions100.0

twlo:StockIssuedDuringPeriodSharesSubjectToFutureVestingConditionsValue us-gaap:StatementClassOfStock

twlo:StockIssuedDuringPeriodSharesSubjectToFutureVestingConditionsValue

us-gaap:CommonClassA


Stock
Period End2020-11-30
Value70
Percentage of StockIssuedDuringPeriodSharesSubjectToFutureVestingConditionsValue100.0

twlo:StockIssuedDuringPeriodSharesSubjectToFutureVestingConditionsWeightedAverageGrantDateFairValue us-gaap:AwardType

twlo:StockIssuedDuringPeriodSharesSubjectToFutureVestingConditionsWeightedAverageGrantDateFairValue

twlo:RSUsSubjectToFutureVesting


Stock
Period End2021-03-31
Value273.38
Percentage of StockIssuedDuringPeriodSharesSubjectToFutureVestingConditionsWeightedAverageGrantDateFairValue100.0

twlo:StockIssuedDuringPeriodValueDonorAdvisedFund

twlo:StockIssuedDuringPeriodValueDonorAdvisedFund


Stock
Period End2021-03-312020-09-302020-06-302020-03-31
Value9.4055.7573.9722.701
Percentage of StockIssuedDuringPeriodValueDonorAdvisedFund100.0100.0100.0100.0

twlo:StockIssuedDuringPeriodValueDonorAdvisedFund us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-03-312020-09-302020-06-302020-03-31
Value9.4055.7573.9722.701
Percentage of StockIssuedDuringPeriodValueDonorAdvisedFund100.0100.0100.0100.0

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments


Accretion
Period End2021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-4240000.0-3880000.0-343000.0338000.01215000.01589000.01359000.0651000.0608000.0265000.0-28000.0-109000.0-46000.0
Percentage of AccretionAmortizationOfDiscountsAndPremiumsInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation


Adjustments
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2774000.01409000.01144000.01674000.01568000.01518000.01062000.0810000.0539000.0371000.0
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2774000.01409000.01144000.01674000.01568000.01518000.01062000.0810000.0539000.0371000.0
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts

us-gaap:AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts


Adjustments
Period End2021-03-312020-09-302019-06-30
Value727000.0541000.0953000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts us-gaap:DebtInstrument

twlo:ConvertibleSeniorNotes0.25PercentDue2023


Adjustments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2819000.00002819000.00002819000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts387.80.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2020-09-302019-06-30
Value541000.0953000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs


Allowance
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value2036000.03623000.0832000.01736000.01463000.0158000.0114000.0193000.0419000.0156000.05000.08000.04000.0188000.0057000.0378000.01000.016000.0400000.061000.0
Percentage of AllowanceForDoubtfulAccountsReceivableWriteOffs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfDebtDiscountPremium us-gaap:DebtInstrument

us-gaap:AmortizationOfDebtDiscountPremium

twlo:ConvertibleSeniorNotes0.25PercentDue2023


Amortization
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value3.0284.9085.65.6945.6945.5365.5365.3835.2345.2332.484
Percentage of AmortizationOfDebtDiscountPremium100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

twlo:SeniorNotes3625PercentDue2029


Amortization
Period End2021-03-31
Value0.049
Percentage of AmortizationOfDebtDiscountPremium1.6

twlo:SeniorNotes3875PercentDue2031


Amortization
Period End2021-03-31
Value0.037
Percentage of AmortizationOfDebtDiscountPremium1.2

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AmortizationOfFinancingCostsAndDiscounts


Amortization
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value6.0766.1786.1786.0075.8415.841
Percentage of AmortizationOfFinancingCostsAndDiscounts100.0100.0100.0100.0100.0100.0

us-gaap:BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued

us-gaap:BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued


Business
Period End2020-11-30
Value9.5
Percentage of BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued100.0

us-gaap:BusinessCombinationAcquisitionRelatedCosts us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationAcquisitionRelatedCosts

twlo:SegmentioInc


Business
Period End2020-12-31
Value78
Percentage of BusinessCombinationAcquisitionRelatedCosts100.0

twlo:ValueFirst


Business
Period End2021-03-31
Value1.3
Percentage of BusinessCombinationAcquisitionRelatedCosts0.0

us-gaap:BusinessCombinationConsiderationTransferred1 us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationConsiderationTransferred1

twlo:SegmentioInc


Business
Period End2020-11-30
Value3000
Percentage of BusinessCombinationConsiderationTransferred1100.0

us-gaap:BusinessCombinationConsiderationTransferred1 us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType

twlo:SegmentioInc, us-gaap:SubsequentEvent


Business
Period End2020-10-12
Value3200
Percentage of BusinessCombinationConsiderationTransferred10.0

us-gaap:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable

twlo:SegmentioInc


Business
Period End2020-11-30
Value2500
Percentage of BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable100.0

us-gaap:CapitalizedComputerSoftwareAdditions

us-gaap:CapitalizedComputerSoftwareAdditions


Capitalized
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value15101212127.28.86.77.05.56.76.76.46.55.55.24.34.03.43.32.4
Percentage of CapitalizedComputerSoftwareAdditions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedComputerSoftwareAmortization1

us-gaap:CapitalizedComputerSoftwareAmortization1


Capitalized
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value4.54.64.44.44.64.64.44.33.83.7243.63.02.72.5072.21.91.81.7861.41.2
Percentage of CapitalizedComputerSoftwareAmortization1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedContractCostAmortization

us-gaap:CapitalizedContractCostAmortization


Capitalized
Period End2021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value5.634.7662.01.61.30.90.70.50.40.30.2
Percentage of CapitalizedContractCostAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:ConcentrationRiskPercentage1

country:US, us-gaap:RevenueFromContractWithCustomer, us-gaap:GeographicConcentrationRisk


Concentration
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value71.073.00.730.720.720.710.710.740.75
Percentage of ConcentrationRiskPercentage1100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NonUs, us-gaap:RevenueFromContractWithCustomer, us-gaap:GeographicConcentrationRisk


Concentration
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value29.027.00.270.280.280.290.290.260.25
Percentage of ConcentrationRiskPercentage140.837.037.038.938.940.840.835.133.3

us-gaap:DebtConversionConvertedInstrumentAmount1

us-gaap:DebtConversionConvertedInstrumentAmount1


Debt
Period End2021-03-312020-12-31
Value422720
Percentage of DebtConversionConvertedInstrumentAmount1100.0100.0

us-gaap:Depreciation

us-gaap:Depreciation


Depreciation
Period End2021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value141111119.79.17.65.45.04.34.23.83.43.12.82.51.91.60.8
Percentage of Depreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Effect
Period End2021-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-44000.0000058000.0-713000.0670000.0148000.0-14000.046000.031000.011000.0
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount

us-gaap:EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount


Employee
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value4.653.1863.73.63.4182.0662.51.61.61.2721.51.51.4281.4641.20.90.7090.8850.40.40.2
Percentage of EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ExtinguishmentOfDebtAmount us-gaap:DebtInstrument

us-gaap:ExtinguishmentOfDebtAmount

twlo:ConvertibleSeniorNotes0.25PercentDue2023


Extinguishment
Period End2021-03-312020-09-30
Value8251
Percentage of ExtinguishmentOfDebtAmount100.0100.0

us-gaap:FinanceLeaseInterestExpense

us-gaap:FinanceLeaseInterestExpense


Finance
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value263000.0275000.0212000.0194000.0198000.0196000.0175000.0189000.0148000.0
Percentage of FinanceLeaseInterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseInterestPaymentOnLiability

us-gaap:FinanceLeaseInterestPaymentOnLiability


Finance
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value263000.0275000.0212000.0194000.0198000.0196000.0154000.0189000.0148000.0
Percentage of FinanceLeaseInterestPaymentOnLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeasePrincipalPayments


Finance
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2748000.03078000.02003000.01837000.01881000.01719000.01464000.01502000.0961000.0
Percentage of FinanceLeasePrincipalPayments100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseRightOfUseAssetAmortization

us-gaap:FinanceLeaseRightOfUseAssetAmortization


Finance
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2680000.02920000.02384000.01830000.01904000.01791000.01610000.01526000.01163000.0
Percentage of FinanceLeaseRightOfUseAssetAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillPurchaseAccountingAdjustments

us-gaap:GoodwillPurchaseAccountingAdjustments


Goodwill
Period End2021-03-312019-12-312019-09-302018-12-312018-09-30
Value39-2845.455-1.940.5710.0
Percentage of GoodwillPurchaseAccountingAdjustments100.0100.0100.0100.00.0

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInAccruedLiabilities


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2828122.5954412199.6284.3485.388115.25122
Percentage of IncreaseDecreaseInAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInContractWithCustomerLiability


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value3.4356.0254.8052.4050.589-0.0751.1161.550.3770.8661.792
Percentage of IncreaseDecreaseInContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value151745145.7597.2654.7873.012.9591.6241.7730.7391.1690.4770.580.7540.1780.076-0.049
Percentage of IncreaseDecreaseInOtherNoncurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherNoncurrentLiabilities

us-gaap:IncreaseDecreaseInOtherNoncurrentLiabilities


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-2570000.0-3566000.0772000.0-1226000.03194000.0-787000.0-343000.0-113000.0-2258000.0580000.0-130000.0-548000.0-499000.0-1147000.010000.0-10000.0306000.0-499000.0291000.0
Percentage of IncreaseDecreaseInOtherNoncurrentLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value292.903-3.2683.8718.13-0.4275.0556.2099.4792.1393.7535.359-2.512-7.1617.02-3.0450.9722.1941.349
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseDebtExcludingAmortization us-gaap:DebtInstrument

us-gaap:InterestExpenseDebtExcludingAmortization

twlo:ConvertibleSeniorNotes0.25PercentDue2023


Interest
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value170000.0221000.0312000.0344000.0344000.0343000.0344000.0344000.0344000.0344000.0164000.0
Percentage of InterestExpenseDebtExcludingAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

twlo:SeniorNotes3625PercentDue2029


Interest
Period End2021-03-31
Value1120000.0
Percentage of InterestExpenseDebtExcludingAmortization658.8

twlo:SeniorNotes3875PercentDue2031


Interest
Period End2021-03-31
Value1197000.0
Percentage of InterestExpenseDebtExcludingAmortization704.1

us-gaap:InvestmentIncomeInterest

us-gaap:InvestmentIncomeInterest


Investment
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3.98.77.17.88.89.07.72.61.50.80.80.70.70.80.70.60.5
Percentage of InvestmentIncomeInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LeaseCost

us-gaap:LeaseCost


Lease
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value222017171513121210
Percentage of LeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseCost


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value14141212108.7768.3368.2737.173
Percentage of OperatingLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value141211129.9537.9758.1718.1513.994
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent


Other
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-3.02117-9.3751.2750.981.041
Percentage of OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-3.02117-9.3751.2750.981.041
Percentage of OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent


Other
Period End2021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-4.17617-9.3750.5081.2750.981.0410.1320.2910.152-0.317-0.36-0.044-0.106-0.088
Percentage of OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-03-312020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-4.17617-9.3751.2750.981.0410.2910.152-0.317
Percentage of OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent


Other
Period End2021-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-210000.00000-230000.0-873000.0-629000.0731000.0349000.0793000.01583000.0-102000.0
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-03-312018-09-302018-06-302018-03-31
Value-210000.0-873000.0-629000.0731000.0
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


Other
Period End2021-03-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-4386000.0-9375000.0508000.01275000.0980000.01041000.0-98000.0-582000.0-477000.0414000.0-11000.0749000.01477000.0-190000.0
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:OtherOperatingActivitiesCashFlowStatement


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value3.089-3.49-3.8442.5054.3523.6955.267-0.842-0.4447.626
Percentage of OtherOperatingActivitiesCashFlowStatement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDebtExtinguishmentCosts

us-gaap:PaymentsOfDebtExtinguishmentCosts


Payments
Period End2020-09-30
Value900000.0
Percentage of PaymentsOfDebtExtinguishmentCosts100.0

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDebtIssuanceCosts


Payments
Period End2021-03-312019-12-312019-09-302018-12-312018-09-30
Value0.130.00.00.0640.364
Percentage of PaymentsOfDebtIssuanceCosts100.00.00.0100.0100.0

us-gaap:PaymentsOfStockIssuanceCosts

us-gaap:PaymentsOfStockIssuanceCosts


Payments
Period End2021-03-312019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302016-12-312016-09-30
Value360000.027000.0503000.00000670000.01837000.0
Percentage of PaymentsOfStockIssuanceCosts100.0100.0100.00.00.00.00.0100.0100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


Payments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2774000.04551000.01409000.01144000.01674000.01264000.01568000.01518000.01062000.0934000.0810000.0539000.0371000.0202000.0165000.0156000.0155000.0
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireBusinessesGross us-gaap:BusinessAcquisition

us-gaap:PaymentsToAcquireBusinessesGross

twlo:SegmentioInc


Payments
Period End2020-11-30
Value413
Percentage of PaymentsToAcquireBusinessesGross100.0

twlo:ValueFirst


Payments
Period End2021-03-12
Value70
Percentage of PaymentsToAcquireBusinessesGross0.0

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired


Payments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value663300.0610.3482.377240.09.826-156.7830.912290.00.00.0
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.00.00.0

us-gaap:PaymentsToDevelopSoftware

us-gaap:PaymentsToDevelopSoftware


Payments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value107.2148.4639.0258.6265.1136.2895.1695.3514.275.3185.1634.7954.9994.2814.3513.6493.083.057
Percentage of PaymentsToDevelopSoftware100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceInitialPublicOffering

us-gaap:ProceedsFromIssuanceInitialPublicOffering


Proceeds
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302018-12-312018-09-30
Value-0.20414080.00.09790.00.0
Percentage of ProceedsFromIssuanceInitialPublicOffering100.0100.00.00.0100.00.00.0

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt


Proceeds
Period End2021-03-31
Value987
Percentage of ProceedsFromIssuanceOfSeniorLongTermDebt100.0

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities


Proceeds
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value356291270304316221188159126825430272864
Percentage of ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProceedsFromStockOptionsExercised


Proceeds
Period End2021-03-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value118.23117159.927157.1798.8637.0376.6783.2234.355.419124.3510.475
Percentage of ProceedsFromStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ProvisionForDoubtfulAccounts


Provision
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value1.9854.7671.3122.8994.171.3750.6760.6850.0111.4591.1111.140.3750.1730.1250.210.0720.1280.170.5440.138
Percentage of ProvisionForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanLossesExpensed

us-gaap:ProvisionForLoanLossesExpensed


Provision
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1302000.02945000.04170000.0683000.0686000.011000.0
Percentage of ProvisionForLoanLossesExpensed100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLongTermDebtAndCapitalSecurities

us-gaap:RepaymentsOfLongTermDebtAndCapitalSecurities


Repayments
Period End2021-03-312020-12-312020-03-312019-12-31
Value2.7514.0961.9541.719
Percentage of RepaymentsOfLongTermDebtAndCapitalSecurities100.0100.0100.0100.0

us-gaap:SaleOfStockConsiderationReceivedOnTransaction

us-gaap:SaleOfStockConsiderationReceivedOnTransaction


Sale
Period End2020-08-31
Value1400
Percentage of SaleOfStockConsiderationReceivedOnTransaction100.0

us-gaap:SaleOfStockConsiderationReceivedOnTransaction us-gaap:StatementClassOfStock

us-gaap:CommonClassA


Sale
Period End2021-02-282020-08-312019-06-30
Value18001400979
Percentage of SaleOfStockConsiderationReceivedOnTransaction0.0100.00.0

us-gaap:SaleOfStockConsiderationReceivedOnTransaction us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType

us-gaap:CommonClassA, us-gaap:SubsequentEvent


Sale
Period End2021-02-22
Value1800
Percentage of SaleOfStockConsiderationReceivedOnTransaction0.0

us-gaap:SaleOfStockNumberOfSharesIssuedInTransaction us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType

us-gaap:SaleOfStockNumberOfSharesIssuedInTransaction

us-gaap:CommonClassA, us-gaap:SubsequentEvent


Sale
Period End2021-02-22
Value4312500.0
Percentage of SaleOfStockNumberOfSharesIssuedInTransaction100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-03-312020-12-31
Value124.664.39
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:RestrictedStock


Share
Period End2021-03-31
Value359.8
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-03-312020-12-31
Value389.2620.61
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue108.20.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-03-312020-12-31
Value84.122.72
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum

us-gaap:EmployeeStock


Share
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value071.3790.7210-0.00040.50340.0770.00020.3978
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum0.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:EmployeeStockOption


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302015-06-30
Value58.49.155.440.560.519000.49190.66500.0280.44160.440900000.5220.537
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum0.00.077.777.70.00.0-0.097.70.00.014000.0111.00.00.00.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum

us-gaap:EmployeeStockOption


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302015-06-30
Value58.3051.3810.5470.5190.00700.49190.483-0.050.4360.44160.4409-0.0180000.5140.52
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum

us-gaap:EmployeeStock


Share
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value00.1980.0020-0.00030.02430.0040.00010.0209
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum0.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:EmployeeStockOption


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302015-06-30
Value1.001.3860.0040.014000.02440.0250.0010.0280.02860.02740.0020000.0140.019
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum0.00.0700.0200.00.00.0-0.0100.40.025.028000.0136.80.00.00.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum

us-gaap:EmployeeStockOption


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302015-06-30
Value0.8-0.30.396-0.0090.013-0.00800.02440.0240.0020.0280.02860.027400000.0130.015
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue

twlo:EmployeeAndNonemployeeStockOption


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value165107893386839671001874756433112182278384.48.30.9
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

twlo:EmployeeAndNonemployeeStockOption


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value205.36106.64093.3760.47-0.03063.458.02.3628.8419.115.24-0.15011.4613.72005.733.97
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.00.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod us-gaap:StatementScenario, us-gaap:AwardType, us-gaap:StatementClassOfStock

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod

srt:ScenarioForecast, us-gaap:EmployeeStock, us-gaap:CommonClassA


Share
Period End2020-12-31
Value103130.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

twlo:EmployeeAndNonemployeeStockOption


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value25.170.590.487.3712.30.310.371.18.65
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice

twlo:EmployeeAndNonemployeeStockOption


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value62.632.19-1.7520.5852.449.9915.176.0520.07
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice

twlo:EmployeeAndNonemployeeStockOption


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312017-12-312017-09-30
Value378.1123.3206.54121.2-0.0600.29118.12-0.40
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0

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

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage

twlo:NewHires, us-gaap:RestrictedStockUnitsRSU, us-gaap:ShareBasedCompensationAwardTrancheOne


Sharebased
Period End2020-09-302020-06-302020-03-312019-12-312019-09-30
Value24.7500.2500
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage100.00.0100.00.00.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1 us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1

twlo:EmployeeAndNonemployeeStockOption


Sharebased
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-06-30
Value3154121723182019554.24.64.87.83.63.04.64.13.94.93.11.4
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShortTermLeaseCost

us-gaap:ShortTermLeaseCost


Short
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1692000.0986000.01195000.01091000.01412000.01254000.01748000.01905000.01435000.0
Percentage of ShortTermLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities


Stock
Period End2021-03-312020-09-30
Value8046
Percentage of StockIssuedDuringPeriodValueConversionOfConvertibleSecurities100.0100.0

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:CommonClassA, us-gaap:CommonStock


Stock
Period End2021-03-312020-09-30
Value0.0020.001
Percentage of StockIssuedDuringPeriodValueConversionOfConvertibleSecurities0.00.0

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-03-312020-09-30
Value8046
Percentage of StockIssuedDuringPeriodValueConversionOfConvertibleSecurities100.0100.0

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments


Stock
Period End2020-12-31
Value542
Percentage of StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments100.0

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardGross

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardGross


Stock
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1000.01000.01000.01000.01000.00
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardGross100.0100.0100.0100.0100.00.0

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardGross us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-03-312019-06-30
Value-1000.00
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardGross0.00.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised


Stock
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value119.221458.2316.8459.927158.8637.0376.678
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value119.221458.2316.8459.926158.8627.0366.677
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition

us-gaap:UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition


Unrecognized
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
Value150.3590.1950.162-0.2542.4971.858510.00.00.00.0
Percentage of UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:UnrecordedUnconditionalPurchaseObligationPurchases

us-gaap:UnrecordedUnconditionalPurchaseObligationPurchases


Unrecorded
Period End2020-09-302020-06-30
Value286.1
Percentage of UnrecordedUnconditionalPurchaseObligationPurchases100.0100.0

us-gaap:ValuationAllowancesAndReservesChargedToOtherAccounts

us-gaap:ValuationAllowancesAndReservesChargedToOtherAccounts


Valuation
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value12138.1745.8612.8622.681
Percentage of ValuationAllowancesAndReservesChargedToOtherAccounts100.0100.0100.0100.0100.0100.0

us-gaap:ValuationAllowancesAndReservesChargedToOtherAccounts us-gaap:ValuationAllowancesAndReservesType

twlo:ContractWithCustomerLiabilityPromotions


Valuation
Period End2021-03-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value158.1747.0165.8612.8622.4041.2591.65115441.1071.4550.1044210.551
Percentage of ValuationAllowancesAndReservesChargedToOtherAccounts0.0100.00.0100.0100.089.70.00.00.00.00.00.00.00.0

us-gaap:ValuationAllowancesAndReservesDeductions

us-gaap:ValuationAllowancesAndReservesDeductions


Valuation
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value12115.2713.8342.6172.865
Percentage of ValuationAllowancesAndReservesDeductions100.0100.0100.0100.0100.0100.0

us-gaap:ValuationAllowancesAndReservesDeductions us-gaap:ValuationAllowancesAndReservesType

twlo:ContractWithCustomerLiabilityPromotions


Valuation
Period End2021-03-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value145.2715.0583.8342.6172.8651.7470.7736211.1660.2940.2385050.277
Percentage of ValuationAllowancesAndReservesDeductions0.0100.00.0100.0100.0100.00.00.00.00.00.00.00.00.0

us-gaap:VariableLeaseCost

us-gaap:VariableLeaseCost


Variable
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2900000.02113000.02066000.01884000.01296000.01223000.01002000.01080000.0487000.0
Percentage of VariableLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:EntityCommonStockSharesOutstanding us-gaap:StatementClassOfStock

dei:EntityCommonStockSharesOutstanding

us-gaap:CommonClassA


Entity
Period End2020-07-272020-04-302020-02-202019-10-252019-07-262019-04-302019-02-012018-10-312018-07-312018-04-302018-01-312017-10-312017-07-312016-07-31
Value13212812812412111010479767170686311
Percentage of EntityCommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonClassB


Entity
Period End2020-07-272020-04-302020-02-202019-10-252019-07-262019-04-302019-02-012018-10-312018-07-312018-04-302018-01-312017-10-312017-07-312016-07-31
Value1011111214161919202324242872
Percentage of EntityCommonStockSharesOutstanding8.28.88.910.111.814.518.524.826.833.334.335.245.0624.2

twlo:AccruedCostOfRevenueCurrent

twlo:AccruedCostOfRevenueCurrent


Accrued
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value888070627147383427292321181011128.7417.5276.496
Percentage of AccruedCostOfRevenueCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

twlo:AccruedLiabilitiesAndOtherLiabilitiesCurrent

twlo:AccruedLiabilitiesAndOtherLiabilitiesCurrent


Accrued
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value29324320519719514713511710799938276535550594231
Percentage of AccruedLiabilitiesAndOtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

twlo:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoAmortizedCostBasis

twlo:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoAmortizedCostBasis


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value20489719795877167347026561200.06.001204367
Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

twlo:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoFairValue

twlo:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoFairValue


Available
Period End2021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value20499767097377056571200.05.945204367
Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoFairValue100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

twlo:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoFairValue us-gaap:FairValueByMeasurementBasis

us-gaap:EstimateOfFairValueFairValueDisclosure


Available
Period End2020-09-302020-06-302019-12-31
Value984596737
Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoFairValue0.00.0100.0

twlo:BusinessCombinationConsiderationHoldbackNonCurrent

twlo:BusinessCombinationConsiderationHoldbackNonCurrent


Business
Period End2021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value8751000.08800000.03750000.03750000.04280000.04280000.0290000.02290000.0
Percentage of BusinessCombinationConsiderationHoldbackNonCurrent100.0100.0100.0100.0100.0100.0100.0100.0

twlo:BusinessCombinationFairValueOfUnvestedEmployeeShares us-gaap:AwardType, us-gaap:BusinessAcquisition

twlo:BusinessCombinationFairValueOfUnvestedEmployeeShares

twlo:EquityAward, twlo:SegmentioInc


Business
Period End2020-11-30
Value245
Percentage of BusinessCombinationFairValueOfUnvestedEmployeeShares100.0

twlo:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinanceLeaseLiability us-gaap:BusinessAcquisition

twlo:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinanceLeaseLiability

twlo:SendgridInc


Business
Period End2020-12-312019-12-312019-09-302019-02-282019-02-01
Value1313131313
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinanceLeaseLiability100.0100.0100.0100.0100.0

twlo:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetTangibleLiabilities us-gaap:BusinessAcquisition

twlo:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetTangibleLiabilities

twlo:OtherAcquisitions


Business
Period End2020-12-312019-12-31
Value45000.03219000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetTangibleLiabilities100.0100.0

twlo:ValueFirst


Business
Period End2021-03-12
Value-9756000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetTangibleLiabilities0.0

twlo:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseLiability us-gaap:BusinessAcquisition

twlo:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseLiability

twlo:SegmentioInc


Business
Period End2020-12-31
Value58
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseLiability100.0

twlo:SendgridInc


Business
Period End2020-12-312019-12-312019-09-302019-02-282019-02-01
Value3232323232
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseLiability56.00.00.00.00.0

twlo:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingRightOfUseAssets us-gaap:BusinessAcquisition

twlo:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingRightOfUseAssets

twlo:SegmentioInc


Business
Period End2020-12-31
Value52
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingRightOfUseAssets100.0

twlo:SendgridInc


Business
Period End2020-12-312019-12-312019-09-302019-02-282019-02-01
Value3333333333
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingRightOfUseAssets64.30.00.00.00.0

twlo:DebtInstrumentConvertibleCarryingAmountOfEquityComponentNetOfIssuanceCosts us-gaap:DebtInstrument

twlo:DebtInstrumentConvertibleCarryingAmountOfEquityComponentNetOfIssuanceCosts

twlo:ConvertibleSeniorNotes0.25PercentDue2023


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value53-585.256-9.07116116116116116116116
Percentage of DebtInstrumentConvertibleCarryingAmountOfEquityComponentNetOfIssuanceCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

twlo:DebtInstrumentLiabilityComponent

twlo:DebtInstrumentLiabilityComponent


Debt
Period End2021-03-312020-12-312020-09-30
Value8019247
Percentage of DebtInstrumentLiabilityComponent100.0100.0100.0

twlo:DeferredTaxAssetLeaseLiability

twlo:DeferredTaxAssetLeaseLiability


Deferred
Period End2020-12-312019-12-31
Value6839
Percentage of DeferredTaxAssetLeaseLiability100.0100.0

twlo:DeferredTaxAssetsCappedCall

twlo:DeferredTaxAssetsCappedCall


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value4.4759.914130.0
Percentage of DeferredTaxAssetsCappedCall100.0100.0100.00.0

twlo:DeferredTaxAssetsDebtIssuanceCosts

twlo:DeferredTaxAssetsDebtIssuanceCosts


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value230000.0493000.0638000.00
Percentage of DeferredTaxAssetsDebtIssuanceCosts100.0100.0100.00.0

twlo:DeferredTaxLiabilitiesConvertibleDebt

twlo:DeferredTaxLiabilitiesConvertibleDebt


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value9.49520270.0
Percentage of DeferredTaxLiabilitiesConvertibleDebt100.0100.0100.00.0

twlo:DeferredTaxLiabilitiesDeferredCommissions

twlo:DeferredTaxLiabilitiesDeferredCommissions


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value217.4462.3960.7180.201
Percentage of DeferredTaxLiabilitiesDeferredCommissions100.0100.0100.0100.0100.0

twlo:FinanceLeaseLiabilityPaymentsDueAfterYearFour

twlo:FinanceLeaseLiabilityPaymentsDueAfterYearFour


Finance
Period End2021-03-312020-09-30
Value518000.0835000.0
Percentage of FinanceLeaseLiabilityPaymentsDueAfterYearFour100.0100.0

twlo:FinancialAssetsAccumulatedGrossUnrealizedGainBeforeTax

twlo:FinancialAssetsAccumulatedGrossUnrealizedGainBeforeTax


Financial
Period End2020-09-302020-06-302020-03-312019-12-31
Value10136.4274.757
Percentage of FinancialAssetsAccumulatedGrossUnrealizedGainBeforeTax100.0100.0100.0100.0

twlo:FinancialAssetsAccumulatedGrossUnrealizedLossBeforeTax

twlo:FinancialAssetsAccumulatedGrossUnrealizedLossBeforeTax


Financial
Period End2020-09-302020-06-302019-12-31
Value719000.0382000.058000.0
Percentage of FinancialAssetsAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.0

twlo:FinancialAssetsAmortizedCostOrCarryingValue

twlo:FinancialAssetsAmortizedCostOrCarryingValue


Financial
Period End2021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value556027561785178818081814882726
Percentage of FinancialAssetsAmortizedCostOrCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0

twlo:FinancialAssetsAmortizedCostOrCarryingValue us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Financial
Period End2020-09-302020-06-302019-12-31
Value320517911788
Percentage of FinancialAssetsAmortizedCostOrCarryingValue0.00.0100.0

twlo:FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour

twlo:FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour


Finite
Period End2021-03-312020-09-30
Value14477
Percentage of FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour100.0100.0

twlo:LeaseLiability

twlo:LeaseLiability


Lease
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value290305229224183182
Percentage of LeaseLiability100.0100.0100.0100.0100.0100.0

twlo:LeaseRightOfUseAsset

twlo:LeaseRightOfUseAsset


Lease
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value269284216212172171
Percentage of LeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0

twlo:LesseeFinanceLeaseAccumulatedDepreciation

twlo:LesseeFinanceLeaseAccumulatedDepreciation


Lessee
Period End2021-03-312020-12-312020-03-312019-12-31
Value17157.96.0
Percentage of LesseeFinanceLeaseAccumulatedDepreciation100.0100.0100.0100.0

twlo:LesseeFinanceLeaseLeaseNotYetCommencedObligation

twlo:LesseeFinanceLeaseLeaseNotYetCommencedObligation


Lessee
Period End2020-09-30
Value4100000.0
Percentage of LesseeFinanceLeaseLeaseNotYetCommencedObligation100.0

twlo:LesseeOperatingLeaseAccumulatedAmortization

twlo:LesseeOperatingLeaseAccumulatedAmortization


Lessee
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value655749413123
Percentage of LesseeOperatingLeaseAccumulatedAmortization100.0100.0100.0100.0100.0100.0

twlo:LesseeOperatingLeaseLeaseNotYetCommencedObligation

twlo:LesseeOperatingLeaseLeaseNotYetCommencedObligation


Lessee
Period End2020-09-30
Value8200000.0
Percentage of LesseeOperatingLeaseLeaseNotYetCommencedObligation100.0

twlo:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour

twlo:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour


Lessee
Period End2021-03-312020-09-30
Value7559
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour100.0100.0

twlo:OperatingLossCarryforwardsIndefiniteLived us-gaap:IncomeTaxAuthority

twlo:OperatingLossCarryforwardsIndefiniteLived

us-gaap:DomesticCountry


Operating
Period End2020-12-31
Value2430
Percentage of OperatingLossCarryforwardsIndefiniteLived100.0

twlo:OtherLongTermInvestmentsFairValue

twlo:OtherLongTermInvestmentsFairValue


Other
Period End2020-09-302019-12-31
Value8126000.05500000.0
Percentage of OtherLongTermInvestmentsFairValue100.0100.0

twlo:OtherLongTermInvestmentsFairValue us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel3


Other
Period End2020-09-302019-12-31
Value8126000.05500000.0
Percentage of OtherLongTermInvestmentsFairValue100.0100.0

us-gaap:AccruedBonusesCurrent

us-gaap:AccruedBonusesCurrent


Accrued
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value182518231112108.9748.138.564
Percentage of AccruedBonusesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent


Allowance
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-06-302015-03-312014-12-31
Value131210109.0856.35.3354.7734.2814.9453.6422.5361.4041.0331.0480.9230.771.0760.9490.7950.6510.4860.5170.440.21
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsFairValueDisclosure

us-gaap:AssetsFairValueDisclosure


Assets
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value55652764321518051781179318121816883726
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1


Assets
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value21489301272546482374395441447480
Percentage of AssetsFairValueDisclosure38.633.739.630.327.120.921.824.350.666.1

us-gaap:FairValueInputsLevel2


Assets
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value34161834193412511291141314111370436246
Percentage of AssetsFairValueDisclosure61.466.360.269.372.578.877.975.449.433.9

us-gaap:FairValueInputsLevel3


Assets
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value8.1267.7187.6945.55.55.00.0
Percentage of AssetsFairValueDisclosure0.30.40.40.30.30.30.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value5.838.53810134.4834.7574.2262.6650.8080.023
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax us-gaap:FinancialInstrument

twlo:CorporateDebtSecuritiesCommercialPaper


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value5.5828.14910122.5564.5164.0232.4270.7290.023
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax95.795.493.691.857.094.995.291.190.2100.0

us-gaap:USTreasurySecurities


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value0.2480.3890.7041.1111.9270.2410.2030.2380.0790.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax4.34.66.48.243.05.14.88.99.80.0

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value33712097216114141504159415471344540261276301191176192197
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Available
Period End2020-09-302020-06-302019-12-31
Value216114141594
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis us-gaap:FairValueByMeasurementBasis, us-gaap:FinancialInstrument

us-gaap:CarryingReportedAmountFairValueDisclosure, twlo:CorporateDebtSecuritiesCommercialPaper


Available
Period End2020-09-302020-06-302019-12-31
Value193812441378
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis89.788.086.5

us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:USTreasurySecurities


Available
Period End2020-09-302020-06-302019-12-31
Value222169215
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis10.312.013.5

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis us-gaap:FinancialInstrument

twlo:CorporateDebtSecuritiesCommercialPaper


Available
Period End2021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value313418741311137813411183386201
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis93.089.487.286.586.788.171.577.1

us-gaap:USTreasurySecurities


Available
Period End2021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value23622319321520516015459
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis7.010.612.813.513.311.928.522.9

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value132211261182827787859844687420261270280147108
Percentage of AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue


Available
Period End2021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value13251128788861845688420261270280147108
Percentage of AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue us-gaap:FairValueByMeasurementBasis

us-gaap:EstimateOfFairValueFairValueDisclosure


Available
Period End2020-09-302020-06-302019-12-31
Value1186831861
Percentage of AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue0.00.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities

us-gaap:AvailableForSaleSecuritiesDebtSecurities


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value33752105217114271497159915511346541261276301190175
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value28127327318320622121016515959
Percentage of AvailableForSaleSecuritiesDebtSecurities8.413.012.612.913.813.813.612.329.422.9

us-gaap:FairValueInputsLevel2


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value30931832189812431291137713401180381201
Percentage of AvailableForSaleSecuritiesDebtSecurities91.687.087.487.186.286.286.487.770.677.1

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:FairValueInputsLevel1, twlo:CorporateDebtSecuritiesCommercialPaper


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value45505013115.05.05.05.0
Percentage of AvailableForSaleSecuritiesDebtSecurities1.32.42.30.90.70.30.30.40.9

us-gaap:FairValueInputsLevel1, us-gaap:USTreasurySecurities


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value23622322317019521620516015459
Percentage of AvailableForSaleSecuritiesDebtSecurities7.010.610.312.013.013.513.311.928.522.9

us-gaap:FairValueInputsLevel2, twlo:CorporateDebtSecuritiesCommercialPaper


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value30931832189812431291137713401180381201
Percentage of AvailableForSaleSecuritiesDebtSecurities91.687.087.487.186.286.286.487.770.677.1

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByMeasurementBasis

us-gaap:EstimateOfFairValueFairValueDisclosure


Available
Period End2020-09-302020-06-302019-12-31
Value217114271599
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FinancialInstrument

twlo:CorporateDebtSecuritiesCommercialPaper


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value31381882194812561302138213451185386201
Percentage of AvailableForSaleSecuritiesDebtSecurities93.089.489.788.087.086.586.788.171.577.1

us-gaap:USTreasurySecurities


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value23622322317019521620516015459
Percentage of AvailableForSaleSecuritiesDebtSecurities7.010.610.312.013.013.513.311.928.522.9

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value337521052171142714971599155113465412612763011901751921970.0
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount us-gaap:BusinessAcquisition

us-gaap:BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount

twlo:OtherAcquisitions


Business
Period End2020-12-31
Value2800000.0
Percentage of BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount100.0

us-gaap:BusinessCombinationContingentConsiderationLiabilityCurrent

us-gaap:BusinessCombinationContingentConsiderationLiabilityCurrent


Business
Period End2020-12-312020-09-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value184000.04061000.04520000.06520000.02240000.02240000.02000000.00
Percentage of BusinessCombinationContingentConsiderationLiabilityCurrent100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents

twlo:SegmentioInc


Business
Period End2020-12-31
Value93
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents100.0

twlo:SendgridInc


Business
Period End2020-12-31
Value156
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents168.3

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables

twlo:SegmentioInc


Business
Period End2020-12-31
Value90
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables100.0

twlo:SendgridInc


Business
Period End2020-12-31
Value11
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables12.8

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable

twlo:SegmentioInc


Business
Period End2020-12-31
Value24
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable100.0

twlo:SendgridInc


Business
Period End2020-12-31
Value11
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable45.8

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities

twlo:SendgridInc


Business
Period End2020-12-312019-12-312019-02-28
Value565656
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities100.0100.0100.0

twlo:ValueFirst


Business
Period End2021-03-12
Value6.179
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities0.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles

twlo:OtherAcquisitions


Business
Period End2020-12-312019-12-31
Value4.2522
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles100.0100.0

twlo:SegmentioInc


Business
Period End2020-12-31
Value595
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles14000.0

twlo:SendgridInc


Business
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312019-02-28
Value483483483483490490
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles11364.72101.30.00.00.00.0

twlo:ValueFirst


Business
Period End2021-03-12
Value30
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles0.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles us-gaap:BusinessAcquisition, us-gaap:FiniteLivedIntangibleAssetsByMajorClass

twlo:OtherAcquisitions, twlo:TelecommunicationLicenses


Business
Period End2020-12-312019-12-31
Value0.54.37
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles11.819.0

twlo:OtherAcquisitions, us-gaap:CustomerRelationships


Business
Period End2020-12-312019-12-31
Value3.755.185
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles88.222.6

twlo:SegmentioInc, us-gaap:CustomerRelationships


Business
Period End2020-12-31
Value190
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles4470.6

twlo:SegmentioInc, us-gaap:DevelopedTechnologyRights


Business
Period End2020-12-31
Value390
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles9176.5

twlo:SegmentioInc, us-gaap:OrderOrProductionBacklog


Business
Period End2020-12-31
Value10.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles235.3

twlo:SegmentioInc, us-gaap:TradeNames


Business
Period End2020-12-31
Value5.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles117.6

twlo:SendgridInc, us-gaap:DevelopedTechnologyRights


Business
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value294294294294301
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles6917.61279.00.00.00.0

twlo:ValueFirst, twlo:SupplierRelationships


Business
Period End2021-03-12
Value7.7
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles0.0

twlo:ValueFirst, twlo:TelecommunicationLicenses


Business
Period End2021-03-12
Value4.7
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles0.0

twlo:ValueFirst, us-gaap:CustomerRelationships


Business
Period End2021-03-12
Value11
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles0.0

twlo:ValueFirst, us-gaap:DevelopedTechnologyRights


Business
Period End2021-03-12
Value6.7
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles0.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt

twlo:SendgridInc


Business
Period End2020-12-31
Value5387000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets

twlo:SegmentioInc


Business
Period End2020-12-31
Value4869000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets100.0

twlo:SendgridInc


Business
Period End2020-12-31
Value1664000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets34.2

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment

twlo:SegmentioInc


Business
Period End2020-12-31
Value5.081
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment100.0

twlo:SendgridInc


Business
Period End2020-12-31
Value38
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment754.8

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet

twlo:OtherAcquisitions


Business
Period End2020-12-312019-12-31
Value1343
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet100.0100.0

twlo:SegmentioInc


Business
Period End2020-12-31
Value2984
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet22888.2

twlo:SendgridInc


Business
Period End2020-12-312019-12-312019-09-302019-02-28
Value2841284128412843
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet21790.36578.70.00.0

twlo:ValueFirst


Business
Period End2021-03-12
Value70
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet0.0

us-gaap:CapitalizedContractCostNet

us-gaap:CapitalizedContractCostNet


Capitalized
Period End2020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value8536302317139.4
Percentage of CapitalizedContractCostNet100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:CashAndCashEquivalentsFairValueDisclosure


Cash
Period End2021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302018-12-31
Value2189658275189255465465
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:CashAndCashEquivalents, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:CommercialPaper, us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure


Cash
Period End2021-03-312020-12-312020-09-302020-06-302019-09-302019-06-302019-03-312018-12-31
Value3222.0367.49913114299.983
Percentage of CashAndCashEquivalentsFairValueDisclosure14.70.30.00.05.324.60.02.1

us-gaap:MoneyMarketFunds, us-gaap:FairValueInputsLevel1, us-gaap:EstimateOfFairValueFairValueDisclosure


Cash
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1867656999362275153184275287420
Percentage of CashAndCashEquivalentsFairValueDisclosure85.399.70.00.0100.081.172.359.30.090.3

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:CashAndCashEquivalents, us-gaap:FairValueByMeasurementBasis

us-gaap:CommercialPaper, us-gaap:CarryingReportedAmountFairValueDisclosure


Cash
Period End2021-03-312020-12-312020-09-302020-06-302019-09-302019-06-302019-03-312018-12-31
Value3222.0367.49913114299.983
Percentage of CashAndCashEquivalentsFairValueDisclosure14.70.30.00.05.324.60.02.1

us-gaap:CommercialPaper, us-gaap:EstimateOfFairValueFairValueDisclosure


Cash
Period End2021-03-312020-12-312020-09-302020-06-302019-09-302019-06-302019-03-312018-12-31
Value3222.0367.49913114299.983
Percentage of CashAndCashEquivalentsFairValueDisclosure14.70.30.00.05.324.60.02.1

us-gaap:MoneyMarketFunds, us-gaap:CarryingReportedAmountFairValueDisclosure


Cash
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1867656999362275153184275287420
Percentage of CashAndCashEquivalentsFairValueDisclosure85.399.70.00.0100.081.172.359.30.090.3

us-gaap:MoneyMarketFunds, us-gaap:EstimateOfFairValueFairValueDisclosure


Cash
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1867656999362275153184275287420
Percentage of CashAndCashEquivalentsFairValueDisclosure85.399.70.00.0100.081.172.359.30.090.3

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1


Cash
Period End2021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302018-12-31
Value1867656275153184275420
Percentage of CashAndCashEquivalentsFairValueDisclosure85.399.7100.081.172.359.390.3

us-gaap:FairValueInputsLevel2


Cash
Period End2021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302018-12-31
Value3222.00.0357018944
Percentage of CashAndCashEquivalentsFairValueDisclosure14.70.30.018.927.740.79.7

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:FairValueInputsLevel1, us-gaap:EstimateOfFairValueFairValueDisclosure


Cash
Period End2020-09-302020-06-302019-12-312019-03-312018-12-31
Value999362153287420
Percentage of CashAndCashEquivalentsFairValueDisclosure0.00.081.10.090.3

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure


Cash
Period End2020-09-302020-06-302019-12-312019-03-312018-12-31
Value367.499355444
Percentage of CashAndCashEquivalentsFairValueDisclosure0.00.018.90.09.7

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Cash
Period End2020-09-302020-06-302019-12-312019-03-312018-12-31
Value1035369189342465
Percentage of CashAndCashEquivalentsFairValueDisclosure0.00.0100.00.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Cash
Period End2020-09-302020-06-302019-12-312019-03-312018-12-31
Value1035369189342465
Percentage of CashAndCashEquivalentsFairValueDisclosure0.00.0100.00.0100.0

us-gaap:ContractWithCustomerLiability

us-gaap:ContractWithCustomerLiability


Contract
Period End2020-12-312019-12-312018-12-31
Value872623
Percentage of ContractWithCustomerLiability100.0100.0100.0

us-gaap:ContractWithCustomerLiability us-gaap:BusinessAcquisition

twlo:SegmentioInc


Contract
Period End2020-12-31
Value47
Percentage of ContractWithCustomerLiability53.9

us-gaap:ConvertibleDebtNoncurrent

us-gaap:ConvertibleDebtNoncurrent


Convertible
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value302432470464458452446440434
Percentage of ConvertibleDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent

us-gaap:DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent


Debt
Period End2021-03-312020-12-312020-09-30
Value342701125
Percentage of DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent100.0100.0100.0

us-gaap:DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent us-gaap:DebtInstrument

twlo:ConvertibleSeniorNotes0.25PercentDue2023


Debt
Period End2021-03-312020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-05-31
Value5674108119119119119119119119119119
Percentage of DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent16.610.686.20.00.00.00.00.00.00.00.00.0

us-gaap:DebtInstrumentFaceAmount us-gaap:DebtInstrument

us-gaap:DebtInstrumentFaceAmount

twlo:ConvertibleSeniorNotes0.25PercentDue2023


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-05-31
Value261343498549549549550550550550
Percentage of DebtInstrumentFaceAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

twlo:SeniorNotes3625PercentDue2029


Debt
Period End2021-03-31
Value500
Percentage of DebtInstrumentFaceAmount191.2

twlo:SeniorNotes3875PercentDue2031


Debt
Period End2021-03-31
Value500
Percentage of DebtInstrumentFaceAmount191.2

us-gaap:DebtInstrumentUnamortizedDiscount us-gaap:DebtInstrument

us-gaap:DebtInstrumentUnamortizedDiscount

twlo:ConvertibleSeniorNotes0.25PercentDue2023


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2638617378849095101106
Percentage of DebtInstrumentUnamortizedDiscount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

twlo:SeniorNotes3625PercentDue2029


Debt
Period End2021-03-31
Value6.209
Percentage of DebtInstrumentUnamortizedDiscount23.5

twlo:SeniorNotes3875PercentDue2031


Debt
Period End2021-03-31
Value6.219
Percentage of DebtInstrumentUnamortizedDiscount23.5

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss


Debt
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value0.7190.382100.0580.2060.310.13
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss us-gaap:FinancialInstrument

twlo:CorporateDebtSecuritiesCommercialPaper


Debt
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value0.7140.382100.0550.1460.3090.123
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss99.3100.0100.094.870.999.794.6

us-gaap:USTreasurySecurities


Debt
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value0.0050.00.00.0030.060.0010.007
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss0.70.00.05.229.10.35.4

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss


Debt
Period End2021-03-312020-12-312019-12-31
Value1604000.0136000.058000.0
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss us-gaap:FinancialInstrument

twlo:CorporateDebtSecuritiesCommercialPaper


Debt
Period End2021-03-312020-12-312019-12-31
Value1548000.0135000.055000.0
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss96.599.394.8

us-gaap:USTreasurySecurities


Debt
Period End2021-03-312020-12-312019-12-31
Value56000.01000.03000.0
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss3.50.75.2

us-gaap:DeferredCostsCurrentAndNoncurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:DeferredCostsCurrentAndNoncurrent

twlo:Syniverse


Deferred
Period End2021-03-31
Value3300000.0
Percentage of DeferredCostsCurrentAndNoncurrent100.0

us-gaap:DeferredFinanceCostsGross us-gaap:DebtInstrument

us-gaap:DeferredFinanceCostsGross

us-gaap:SeniorNotes


Deferred
Period End2021-03-31
Value2400000.0
Percentage of DeferredFinanceCostsGross100.0

us-gaap:DeferredFinanceCostsNet us-gaap:DebtInstrument

us-gaap:DeferredFinanceCostsNet

twlo:ConvertibleSeniorNotes0.25PercentDue2023


Deferred
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-05-31
Value2.213.2285.1616.1936.6787.1627.6338.1048.5629.029.5059.9510
Percentage of DeferredFinanceCostsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

twlo:SeniorNotes3625PercentDue2029


Deferred
Period End2021-03-31
Value1.213
Percentage of DeferredFinanceCostsNet54.9

twlo:SeniorNotes3875PercentDue2031


Deferred
Period End2021-03-31
Value1.216
Percentage of DeferredFinanceCostsNet55.0

us-gaap:DeferredRentCreditCurrent

us-gaap:DeferredRentCreditCurrent


Deferred
Period End2021-03-312020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value9389000.09062000.000001418000.01334000.01251000.01179000.01048000.0668000.0606000.01250000.0
Percentage of DeferredRentCreditCurrent100.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsCharitableContributionCarryforwards

us-gaap:DeferredTaxAssetsCharitableContributionCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value8229000.03172000.03100000.01233000.01458000.0
Percentage of DeferredTaxAssetsCharitableContributionCarryforwards100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGoodwillAndIntangibleAssets

us-gaap:DeferredTaxAssetsGoodwillAndIntangibleAssets


Deferred
Period End2020-12-31
Value135
Percentage of DeferredTaxAssetsGoodwillAndIntangibleAssets100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1014439188906242
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value656274116563127
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsResearch

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsResearch


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value926532167.8076.022
Percentage of DeferredTaxAssetsTaxCreditCarryforwardsResearch100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value3235117.1315.3681.433
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1511119.14167.603
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesDeferredExpenseCapitalizedSoftware

us-gaap:DeferredTaxLiabilitiesDeferredExpenseCapitalizedSoftware


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1913107.6647.0864.084
Percentage of DeferredTaxLiabilitiesDeferredExpenseCapitalizedSoftware100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value2311072.9972.1010.1520.46
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesLeasingArrangements

us-gaap:DeferredTaxLiabilitiesLeasingArrangements


Deferred
Period End2020-12-312019-12-31
Value6639
Percentage of DeferredTaxLiabilitiesLeasingArrangements100.0100.0

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value2876000.0405000.000
Percentage of DeferredTaxLiabilitiesOther100.0100.00.00.0

us-gaap:DeferredTaxLiabilitiesPrepaidExpenses

us-gaap:DeferredTaxLiabilitiesPrepaidExpenses


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value450000.01157000.0838000.01015000.0452000.02035000.0
Percentage of DeferredTaxLiabilitiesPrepaidExpenses100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value85000.01578000.01990000.02380000.04931000.0240000.0
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent


Employee
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value5554353030202115169.886
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized


Employee
Period End2021-03-31
Value1209
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions


Employee
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value6.51.65.01.34.41.03.20.8
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions us-gaap:AwardType

twlo:RSUsSubjectToFutureVesting


Employee
Period End2021-03-312020-12-31
Value5865
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions0.01013.8

us-gaap:EmployeeStock


Employee
Period End2021-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-06-30
Value2.1192.20.51.40.41.10.31.07.4
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions0.00.00.00.00.00.00.00.00.0

us-gaap:RestrictedStockUnitsRSU


Employee
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-06-30
Value923904818831579573532532447325238229190148121997.6
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions0.013918.551162.516628.044607.713027.353210.016625.055900.00.00.00.00.00.00.00.00.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions


Employee
Period End2021-03-31
Value225
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions us-gaap:AwardType

twlo:EmployeeAndNonemployeeStockOptionIncludingPerformanceBasedOptions


Employee
Period End2020-12-312020-09-30
Value25075
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions0.00.0

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiability


Finance
Period End2021-03-312020-12-312020-09-30
Value292624
Percentage of FinanceLeaseLiability100.0100.0100.0

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityCurrent


Finance
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value9389000.09062000.08862000.07134000.06539000.06924000.06509000.05920000.06044000.00
Percentage of FinanceLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityNoncurrent


Finance
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value191716107.258.7468.1747.7529.1240.0
Percentage of FinanceLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDue


Finance
Period End2021-03-312020-12-312020-09-30
Value312826
Percentage of FinanceLeaseLiabilityPaymentsDue100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive


Finance
Period End2020-12-31
Value518000.0
Percentage of FinanceLeaseLiabilityPaymentsDueAfterYearFive100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths


Finance
Period End2021-03-312020-12-312020-09-30
Value8987000.09866000.08565000.0
Percentage of FinanceLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive


Finance
Period End2020-12-31
Value316000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearFive100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour


Finance
Period End2021-03-312020-12-312020-09-30
Value547000.03604000.02639000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearFour100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree


Finance
Period End2021-03-312020-12-312020-09-30
Value4999000.06841000.05495000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearThree100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo


Finance
Period End2021-03-312020-12-312020-09-30
Value8240000.07588000.06242000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear


Finance
Period End2021-03-312020-09-30
Value7911000.02902000.0
Percentage of FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear100.0100.0

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount


Finance
Period End2021-03-312020-12-312020-09-30
Value1880000.01815000.01782000.0
Percentage of FinanceLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseRightOfUseAsset


Finance
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value282523161214
Percentage of FinanceLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseRightOfUseAssetAccumulatedAmortization

us-gaap:FinanceLeaseRightOfUseAssetAccumulatedAmortization


Finance
Period End2020-09-302020-06-302019-12-31
Value129.76.0
Percentage of FinanceLeaseRightOfUseAssetAccumulatedAmortization100.0100.0100.0

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent


Finance
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-31
Value3.73.94.10.0480.0535.30.0520.052
Percentage of FinanceLeaseWeightedAverageDiscountRatePercent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value2311851481281078767472714119.7138.5737.155.6564.0891.3990.770.489
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

twlo:SupplierRelationships


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value3.4613.0442.6922.3432.0061.5321.4021.241.1070.9730.850.7170.6310.50.3640.215
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization1.51.61.81.81.91.82.12.64.06.97.47.47.47.06.45.3

us-gaap:CustomerRelationships


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value74594740332619136.8892.4111.81.3841.2291.0060.7740.5220.1480.1080.068
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization32.232.131.731.431.030.229.428.224.817.115.614.214.314.113.712.810.614.013.9

us-gaap:DevelopedTechnologyRights


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value13911391796755433018108.6897.4126.5295.4764.3653.2131.140.5860.37
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization60.360.961.762.162.563.564.165.067.874.375.276.376.276.677.278.681.576.175.7

us-gaap:OrderOrProductionBacklog


Finite
Period End2021-03-312020-12-31
Value4.1671.667
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization1.80.9

us-gaap:Patents


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value0.4090.3730.3420.3120.2880.2620.2510.2240.20.1780.1590.140.1240.1080.0930.0790.0550.0350.025
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization0.20.20.20.20.30.30.40.50.71.31.41.41.41.51.61.93.94.55.1

us-gaap:TradeNames


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value9.2527.9216.7275.7274.7273.7272.7271.7270.7270.060.060.060.060.060.060.060.0560.0410.026
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization4.04.34.54.54.44.34.13.72.60.40.50.60.70.81.11.54.05.35.3

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive


Finite
Period End2020-12-31
Value138
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths


Finite
Period End2021-03-312020-12-312020-09-30
Value17217180
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear


Finite
Period End2021-03-312020-09-30
Value13619
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive


Finite
Period End2020-12-31
Value156
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour


Finite
Period End2021-03-312020-12-312020-09-30
Value16116269
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree


Finite
Period End2021-03-312020-12-312020-09-30
Value16316474
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo


Finite
Period End2021-03-312020-12-312020-09-30
Value16816877
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:FiniteLivedIntangibleAssetsGross


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value1177114754754754754353253253141412627262626113.1112.781
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

twlo:SupplierRelationships


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value124.3564.3564.3564.3564.3562.6962.6962.6962.6962.7382.7592.9322.8812.8542.761
Percentage of FiniteLivedIntangibleAssetsGross1.00.40.80.80.80.80.50.50.56.56.710.410.810.710.710.6

us-gaap:CustomerRelationships


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value3903791851851851821781781778.1538.2456.8747.287.1597.0966.8770.40.40.4
Percentage of FiniteLivedIntangibleAssetsGross33.233.133.933.933.933.633.533.533.319.720.125.926.726.626.626.33.512.914.4

us-gaap:DevelopedTechnologyRights


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value731724334334334333328328329282714151414149.41.31.3
Percentage of FiniteLivedIntangibleAssetsGross62.163.261.161.161.161.561.761.762.068.267.455.455.255.555.956.382.741.846.7

us-gaap:Patents


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value3.5033.363.2473.1042.9052.7072.5252.4392.2622.2642.3252.1271.9471.8781.7371.7111.5121.3511.021
Percentage of FiniteLivedIntangibleAssetsGross0.30.30.60.60.50.50.50.50.45.55.78.07.17.06.56.613.343.436.7

us-gaap:TradeNames


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value3025202020202020200.060.060.060.060.060.060.060.060.060.06
Percentage of FiniteLivedIntangibleAssetsGross2.62.23.73.73.73.73.83.83.80.10.10.20.20.20.20.20.51.92.2

us-gaap:IntangibleAssetsGrossExcludingGoodwill

us-gaap:IntangibleAssetsGrossExcludingGoodwill


Intangible
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value1182115255355255254853253253141412627272626113.3742.781
Percentage of IntangibleAssetsGrossExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2021-03-312020-12-312020-09-30
Value576047
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear


Lessee
Period End2021-03-312020-09-30
Value4211
Percentage of LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear100.0100.0

us-gaap:LongTermDebtFairValue us-gaap:DebtInstrument, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:LongTermDebtFairValue

twlo:ConvertibleSeniorNotes0.25PercentDue2023, us-gaap:FairValueInputsLevel2


Long
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value130017001731171876884190811161060743
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

twlo:SeniorNotes3625PercentDue2029, us-gaap:FairValueInputsLevel2


Long
Period End2021-03-31
Value510
Percentage of LongTermDebtFairValue39.3

twlo:SeniorNotes3875PercentDue2031, us-gaap:FairValueInputsLevel2


Long
Period End2021-03-31
Value512
Percentage of LongTermDebtFairValue39.4

us-gaap:NotesReceivableFairValueDisclosure

us-gaap:NotesReceivableFairValueDisclosure


Notes
Period End2021-03-312020-12-312019-12-31
Value9300000.09300000.05500000.0
Percentage of NotesReceivableFairValueDisclosure100.0100.0100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-31
Value4.84.85.30.0540.0575.50.0580.058
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:OperatingLossCarryforwards

us-gaap:DomesticCountry


Operating
Period End2020-12-312019-12-312018-12-312017-12-31
Value3031159452229
Percentage of OperatingLossCarryforwards100.0100.0100.0100.0

us-gaap:ForeignCountry


Operating
Period End2020-12-312019-12-312018-12-31
Value27138.1
Percentage of OperatingLossCarryforwards9.21.21.8

us-gaap:StateAndLocalJurisdiction


Operating
Period End2020-12-312019-12-312018-12-312017-12-31
Value1782630347159
Percentage of OperatingLossCarryforwards586.754.476.769.6

us-gaap:OtherAccruedLiabilitiesNoncurrent

us-gaap:OtherAccruedLiabilitiesNoncurrent


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value141410128.8546.4622.352.1222.0130.9590.830.4710.4720.4770.4340.2840.1560.2360.084
Percentage of OtherAccruedLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherEmployeeRelatedLiabilitiesCurrent

us-gaap:OtherEmployeeRelatedLiabilitiesCurrent


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value166.272124.195114.0239.2974.0046.5012.672
Percentage of OtherEmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherLongTermInvestments

us-gaap:OtherLongTermInvestments


Other
Period End2020-09-30
Value8100000.0
Percentage of OtherLongTermInvestments100.0

us-gaap:OtherLongTermInvestments us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Other
Period End2020-09-302019-12-31
Value8126000.05500000.0
Percentage of OtherLongTermInvestments100.30.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization


Property
Period End2021-03-312020-12-312020-09-302020-06-302019-12-31
Value14613011610481
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization100.0100.0100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization


Property
Period End2021-03-312020-12-312020-09-302020-06-302019-12-31
Value195183173161141
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization100.0100.0100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization


Property
Period End2021-03-312020-12-312020-09-302020-06-302019-12-31
Value342313290265222
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization100.0100.0100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization us-gaap:PropertyPlantAndEquipmentByType

twlo:SoftwareNotIncludingSoftwareDevelopmentCosts


Property
Period End2021-03-312020-12-312020-09-302020-06-302019-12-31
Value109.9439.919.9099.176
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization3.03.23.43.74.1

us-gaap:ComputerEquipment


Property
Period End2021-03-312020-12-312020-09-302020-06-302019-12-31
Value4943372722
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization14.513.912.810.39.9

us-gaap:FurnitureAndFixtures


Property
Period End2021-03-312020-12-312020-09-302020-06-302019-12-31
Value1212101010
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization3.73.93.74.04.5

us-gaap:LeaseholdImprovements


Property
Period End2021-03-312020-12-312020-09-302020-06-302019-12-31
Value7069666555
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization20.622.322.824.825.1

us-gaap:OfficeEquipment


Property
Period End2021-03-312020-12-312020-09-302020-06-302019-12-31
Value4535312925
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization13.211.310.811.111.3

us-gaap:SoftwareDevelopment


Property
Period End2021-03-312020-12-312020-09-302020-06-302019-12-31
Value154142134122100
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization45.045.546.546.145.0

us-gaap:RevenueRemainingPerformanceObligation

us-gaap:RevenueRemainingPerformanceObligation


Revenue
Period End2020-12-31
Value84
Percentage of RevenueRemainingPerformanceObligation100.0

us-gaap:RevenueRemainingPerformanceObligationPercentage

us-gaap:RevenueRemainingPerformanceObligationPercentage


Revenue
Period End2020-12-31
Value59.0
Percentage of RevenueRemainingPerformanceObligationPercentage100.0

us-gaap:SaleOfStockPricePerShare us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType

us-gaap:SaleOfStockPricePerShare

us-gaap:CommonClassA, us-gaap:SubsequentEvent


Sale
Period End2021-02-22
Value409.6
Percentage of SaleOfStockPricePerShare100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value150.39131.76111.58103.0880.6174.2168.3965.3655.0542.735.1632.229.0229.2930.8631.7132.6610.659.39
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

twlo:EmployeeAndNonemployeeStockOption


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value1304145488384140051163992697454357337424514521823733251580
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

twlo:PerformanceBasedEmployeeStockOptions


Share
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
Value17011910432364358540.030133.585
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue11.713.512.48.07.26.86.35.60.05.33.61.5

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue

twlo:EmployeeAndNonemployeeStockOption


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value818869610569329398460597591362356228154
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

twlo:PerformanceBasedEmployeeStockOptions


Share
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
Value1631099126283027180.0106525.0472.2480.598
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue18.817.916.08.17.16.74.73.00.01.41.00.4

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice

twlo:EmployeeAndNonemployeeStockOption


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value26.8923.5119.0517.4718.0714.012.4811.510.599.389.078.67.71
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested

us-gaap:RestrictedStockUnitsRSU


Sharebased
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-06-302015-12-31
Value23022542197919237138309261217113872963543127113313010758320.716
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding

twlo:RSUsSubjectToFutureVesting


Sharebased
Period End2021-03-31
Value88
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding100.0

us-gaap:RestrictedStock


Sharebased
Period End2021-03-31
Value8.9
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding10.1

us-gaap:TaxCreditCarryforwardAmount us-gaap:IncomeTaxAuthority

us-gaap:TaxCreditCarryforwardAmount

us-gaap:DomesticCountry


Tax
Period End2020-12-312019-12-312018-12-312017-12-31
Value79582612
Percentage of TaxCreditCarryforwardAmount100.0100.0100.0100.0

us-gaap:StateAndLocalJurisdiction


Tax
Period End2020-12-312019-12-312018-12-312017-12-31
Value57381911
Percentage of TaxCreditCarryforwardAmount72.266.574.587.3

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued


Unrecognized
Period End2020-12-31
Value300000.0
Percentage of UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued100.0

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate


Unrecognized
Period End2020-12-31
Value4400000.0
Percentage of UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate100.0

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary


Unrecorded
Period End2020-12-31
Value81
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary100.0

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary


Unrecorded
Period End2020-12-31
Value27
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary100.0

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary


Unrecorded
Period End2020-12-31
Value29
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary100.0

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount


Unrecorded
Period End2021-03-312020-12-312020-03-31
Value42613916
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount100.0100.0100.0

us-gaap:ValuationAllowancesAndReservesBalance

us-gaap:ValuationAllowancesAndReservesBalance


Valuation
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value10119.6876.7845.1033.0762.8313.015
Percentage of ValuationAllowancesAndReservesBalance100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ValuationAllowancesAndReservesBalance us-gaap:ValuationAllowancesAndReservesType

twlo:ContractWithCustomerLiabilityPromotions


Valuation
Period End2021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value17169.6876.7845.1033.0762.8313.0153.50326251.7021.7610.67340.8180.5440.714
Percentage of ValuationAllowancesAndReservesBalance0.00.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.0

Line plots across dimensions of each concept


us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:IncomeStatementLocation
(None,)
Allocated Share Based Compensation Expenseus-gaap: Income Statement Location
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:StatementGeographical
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Statement Geographical
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:StockholdersEquity
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
(None, 'us-gaap:CommonStock')
Stockholders Equityus-gaap: Statement Class Of Stock, us-gaap: Statement Equity Components
us-gaap:Goodwill
us-gaap:BusinessAcquisition
(None,)
Goodwillus-gaap: Business Acquisition
us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass
(None,)
Indefinite Lived Intangible Assets Excluding Goodwillus-gaap: Indefinite Lived Intangible Assets By Major Class
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:StockholdersEquity
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
(None, 'us-gaap:CommonStock')
Stockholders Equityus-gaap: Statement Class Of Stock, us-gaap: Statement Equity Components