$TWLO
Twilio Inc Stock $twlo

$twlo Overview Financials Valuation SEC Filings Company Website

2019 Q3 Form 10-Q Financial Statement

#000144766919000028 Filed on October 31, 2019

Income Statement

Concept	2019 Q3	2018 Q4	2018 Q3
Revenue	$295.1M	$204.3M	$168.9M
YoY Change	74.7%	77.34%	68.05%
Cost Of Revenue	$136.9M	$96.30M	$77.03M
YoY Change	77.73%	75.09%	59.48%
Gross Profit	$158.2M	$108.0M	$91.86M
YoY Change	72.17%	79.4%	75.65%
Gross Profit Margin	53.6%	52.86%	54.39%
Selling, General & Admin	$148.3M	$92.60M	$74.56M
YoY Change	98.97%	99.57%	67.17%
% of Gross Profit	93.79%	85.74%	81.16%
Research & Development	$104.5M	$51.60M	$42.34M
YoY Change	146.77%	57.32%	33.56%
% of Gross Profit	66.06%	47.78%	46.09%
Depreciation & Amortization	$9.700M	$7.850M	$5.000M
YoY Change	94.0%	46.73%	1.42%
% of Gross Profit	6.13%	7.27%	5.44%
Operating Expenses	$252.8M	$152.0M	$116.9M
YoY Change	116.28%	88.82%	53.21%
Operating Profit	-$94.67M	-$44.00M	-$25.03M
YoY Change	278.16%	116.75%	4.3%
Interest Expense
YoY Change
% of Operating Profit
Other Income/Expense, Net	$4.377M	-$2.800M	-$1.939M
YoY Change	-325.73%	-354.55%	-293.9%
Pretax Income	-$90.29M	-$46.70M	-$26.97M
YoY Change	234.75%	144.5%	17.27%
Income Tax	-$2.600M	$400.0K	$84.00K
% Of Pretax Income
Net Earnings	-$87.73M	-$47.20M	-$27.06M
YoY Change	224.27%	149.74%	15.13%
Net Earnings / Revenue	-29.73%	-23.1%	-16.02%
Basic Earnings Per Share
Diluted Earnings Per Share	-$643.0K	-$474.8K	-$276.5K
COMMON SHARES
Basic Shares Outstanding
Diluted Shares Outstanding

Balance Sheet

Concept	2019 Q3	2018 Q4	2018 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.882B	$748.3M	$745.0M
YoY Change	152.59%	157.16%	162.32%
Cash & Equivalents	$330.6M	$487.2M	$489.3M
Short-Term Investments	$1.551B	$261.1M	$276.0M
Other Short-Term Assets	$55.00M	$27.00M	$25.00M
YoY Change	120.0%	42.11%	-3.85%
Inventory
Prepaid Expenses
Receivables	$131.2M	$97.71M	$80.00M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$2.068B	$872.9M	$851.0M
YoY Change	143.06%	147.29%	144.54%
LONG-TERM ASSETS
Property, Plant & Equipment	$118.5M	$63.53M	$59.00M
YoY Change	100.82%	24.58%	22.92%
Goodwill	$2.283B	$38.17M
YoY Change		113.8%
Intangibles	$465.3M	$27.56M
YoY Change
Long-Term Investments
YoY Change
Other Assets	$26.48M	$8.386M	$27.00M
YoY Change	-1.94%	4.83%	170.0%
Total Long-Term Assets	$3.042B	$155.8M	$153.0M
YoY Change	1888.07%	60.58%	59.38%
TOTAL ASSETS
Total Short-Term Assets	$2.068B	$872.9M	$851.0M
Total Long-Term Assets	$3.042B	$155.8M	$153.0M
Total Assets	$5.110B	$1.029B	$1.004B
YoY Change	408.98%	128.6%	126.13%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$25.95M	$18.50M	$13.00M
YoY Change	99.61%	68.14%	85.71%
Accrued Expenses	$158.0M	$100.0M	$94.00M
YoY Change	68.09%	85.19%	70.91%
Deferred Revenue	$26.02M	$22.97M
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$7.000M
YoY Change
Total Short-Term Liabilities	$216.2M	$137.8M	$125.0M
YoY Change	72.98%	74.44%	64.47%
LONG-TERM LIABILITIES
Long-Term Debt	$460.0M	$437.0M	$429.0M
YoY Change	7.23%
Other Long-Term Liabilities	$14.34M	$18.17M	$10.00M
YoY Change	43.41%	101.88%	0.0%
Total Long-Term Liabilities	$14.34M	$18.17M	$439.0M
YoY Change	-96.73%	101.88%	4290.0%
TOTAL LIABILITIES
Total Short-Term Liabilities	$216.2M	$137.8M	$125.0M
Total Long-Term Liabilities	$14.34M	$18.17M	$439.0M
Total Liabilities	$825.7M	$590.5M	$569.0M
YoY Change	45.11%	556.08%	539.33%
SHAREHOLDERS EQUITY
Retained Earnings	-$588.5M	-$371.7M
YoY Change
Common Stock	$4.868B	$808.6M
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$4.284B	$438.2M	$434.4M
YoY Change
Total Liabilities & Shareholders Equity	$5.110B	$1.029B	$1.004B
YoY Change	408.98%	128.6%	126.13%

Cashflow Statement

Concept	2019 Q3	2018 Q4	2018 Q3
OPERATING ACTIVITIES
Net Income	-$87.73M	-$47.20M	-$27.06M
YoY Change	224.27%	149.74%	15.13%
Depreciation, Depletion And Amortization	$9.700M	$7.850M	$5.000M
YoY Change	94.0%	46.73%	1.42%
Cash From Operating Activities	$15.84M	-$4.850M	-$6.400M
YoY Change	-347.5%	-227.97%	113.33%
INVESTING ACTIVITIES
Capital Expenditures	-$17.40M	-$5.960M	-$6.430M
YoY Change	170.61%	4.2%	4.21%
Acquisitions
YoY Change
Other Investing Activities	-$203.5M	$14.94M	-$3.860M
YoY Change	5170.73%	-6.27%	-210.29%
Cash From Investing Activities	-$220.9M	$8.980M	-$10.28M
YoY Change	2048.35%	-12.13%	283.58%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-1.090M	11.83M	7.690M
YoY Change	-114.17%	59.01%	83.97%
NET CHANGE
Cash From Operating Activities	15.84M	-4.850M	-6.400M
Cash From Investing Activities	-220.9M	8.980M	-10.28M
Cash From Financing Activities	-1.090M	11.83M	7.690M
Net Change In Cash	-206.1M	15.96M	-8.990M
YoY Change	2192.55%	-25.59%	499.33%
FREE CASH FLOW
Cash From Operating Activities	$15.84M	-$4.850M	-$6.400M
Capital Expenditures	-$17.40M	-$5.960M	-$6.430M
Free Cash Flow	$33.24M	$1.110M	$30.00K
YoY Change	110700.0%	-88.33%	-99.05%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
	dei	Entity Central Index Key EntityCentralIndexKey	0001447669
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	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
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	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment	0	USD
CY2018Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2019Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	100000000	shares
CY2018Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2018Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2019Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2019-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	001-37806
	dei	Entity Registrant Name EntityRegistrantName	TWILIO INC.
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	26-2574840
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	94105
	dei	City Area Code CityAreaCode	415
	dei	Local Phone Number LocalPhoneNumber	390-2337
	dei	Security12b Title Security12bTitle	Class A Common Stock, par value $0.001 per share
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Trading Symbol TradingSymbol	TWLO
	dei	Entity Address Address Line1 EntityAddressAddressLine1	101 Spear Street
	dei	Entity Address Address Line2 EntityAddressAddressLine2	First Floor
	dei	Entity Address City Or Town EntityAddressCityOrTown	San Francisco
	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
	dei	Security Exchange Name SecurityExchangeName	NYSE
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
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	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-645000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-86459000	USD
CY2018Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-27638000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-213520000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-75436000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	438235000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	-36503000	USD
CY2019Q1	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	15328000	USD
CY2019Q1	twlo	Adjustment To Additional Paid In Capital Vesting Of Early Exercised Stock Options AdjustmentToAdditionalPaidInCapitalVestingOfEarlyExercisedStockOptions	9000	USD
CY2019Q1	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	1062000	USD
CY2019Q1	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	2658898000	USD
CY2019Q1	twlo	Equity Awards Assumed During Period Value EquityAwardsAssumedDuringPeriodValue	191620000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	1041000	USD
CY2019Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	59947000	USD
CY2019Q1	us-gaap	Stockholders Equity StockholdersEquity	3327513000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	980000	USD
CY2019Q3	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	6845000	USD
CY2019Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	72361000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	-92579000	USD
CY2019Q2	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	980000000	USD
CY2019Q2	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	953000	USD
CY2019Q2	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	9927000	USD
CY2019Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	1000	USD
CY2019Q2	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	1518000	USD
CY2019Q2	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	8254000	USD
CY2019Q2	twlo	Equity Awards Assumed During Period Value EquityAwardsAssumedDuringPeriodValue	-7126000	USD
CY2019Q2	us-gaap	Stockholders Equity StockholdersEquity	4296860000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	-87734000	USD
CY2019Q3	twlo	Adjustment To Additional Paid In Capital Vesting Of Early Exercised Stock Options AdjustmentToAdditionalPaidInCapitalVestingOfEarlyExercisedStockOptions	12000	USD
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	17689000	USD
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	8374000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	197332000	USD
CY2019Q3	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	1000	USD
CY2019Q3	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	1568000	USD
CY2019Q3	twlo	Equity Awards Assumed During Period Value EquityAwardsAssumedDuringPeriodValue	-1940000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	1275000	USD
CY2019Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	70735000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	4284486000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	359846000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	-23729000	USD
CY2018Q1	us-gaap	Cumulative Effect On Retained Earnings Net Of Tax1 CumulativeEffectOnRetainedEarningsNetOfTax1	713000	USD
CY2018Q1	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	6678000	USD
CY2018Q1	twlo	Adjustment To Additional Paid In Capital Vesting Of Early Exercised Stock Options AdjustmentToAdditionalPaidInCapitalVestingOfEarlyExercisedStockOptions	21000	USD
CY2018Q1	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	371000	USD
CY2018Q1	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-317000	USD
CY2018Q1	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	731000	USD
CY2018Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	18968000	USD
CY2018Q1	us-gaap	Stockholders Equity StockholdersEquity	362540000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	-24006000	USD
CY2018Q2	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	7037000	USD
CY2018Q2	twlo	Adjustment To Additional Paid In Capital Vesting Of Early Exercised Stock Options AdjustmentToAdditionalPaidInCapitalVestingOfEarlyExercisedStockOptions	4000	USD
CY2018Q2	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	539000	USD
CY2018Q2	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	4474000	USD
CY2018Q2	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt	119435000	USD
CY2018Q2	twlo	Adjustments To Additional Paid In Capital Debt Conversion Option Issuance Costs AdjustmentsToAdditionalPaidInCapitalDebtConversionOptionIssuanceCosts	2819000	USD
CY2018Q2	twlo	Adjustments To Additional Paid In Capital Capped Call Option Issuance Costs AdjustmentsToAdditionalPaidInCapitalCappedCallOptionIssuanceCosts	58465000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	152000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-629000	USD
CY2018Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	22487000	USD
CY2018Q2	us-gaap	Stockholders Equity StockholdersEquity	429671000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	-27056000	USD
CY2018Q3	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	8863000	USD
CY2018Q3	twlo	Adjustment To Additional Paid In Capital Vesting Of Early Exercised Stock Options AdjustmentToAdditionalPaidInCapitalVestingOfEarlyExercisedStockOptions	1000	USD
CY2018Q3	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	810000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	291000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-873000	USD
CY2018Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	24266000	USD
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	434353000	USD
	us-gaap	Profit Loss ProfitLoss	-216816000	USD
	us-gaap	Profit Loss ProfitLoss	-74791000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	79295000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	18246000	USD
	us-gaap	Amortization Of Leased Asset AmortizationOfLeasedAsset	16732000	USD
	us-gaap	Amortization Of Leased Asset AmortizationOfLeasedAsset	0	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	4163000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	845000	USD
	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	0	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	61287000	USD
	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	55999000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	3981000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	5198000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	27619000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	39643000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	20743000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	6600000	USD
	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	10756000	USD
	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	3681000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	4333000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	1641000	USD
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	33826000	USD
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	39732000	USD
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	3043000	USD
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	5092000	USD
	twlo	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-15397000	USD
	twlo	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	0	USD
	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-2714000	USD
	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-1177000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2024000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	12833000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-146957000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	29662000	USD
	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	1769125000	USD
	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	213533000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	475260000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	113497000	USD
	us-gaap	Payments To Develop Software PaymentsToDevelopSoftware	16809000	USD
	us-gaap	Payments To Develop Software PaymentsToDevelopSoftware	15276000	USD
	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	18994000	USD
	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	3428000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1182711000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-148402000	USD
	us-gaap	Proceeds From Issuance Initial Public Offering ProceedsFromIssuanceInitialPublicOffering	980000000	USD
	us-gaap	Proceeds From Issuance Initial Public Offering ProceedsFromIssuanceInitialPublicOffering	0	USD
	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	850000	USD
	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	0	USD
	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	0	USD
	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	550000000	USD
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	12877000	USD
	twlo	Purchases Of Property Equipment Through Financing Lease PurchasesOfPropertyEquipmentThroughFinancingLease	3141000	USD
	twlo	Purchases Of Property Equipment Through Financing Lease PurchasesOfPropertyEquipmentThroughFinancingLease	0	USD
	twlo	Business Combination Consideration Withheld BusinessCombinationConsiderationWithheld	4230000	USD
	twlo	Business Combination Consideration Withheld BusinessCombinationConsiderationWithheld	2000000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	509000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	544000	USD
	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	2841452000	USD
	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	0	USD
	twlo	Cash Paid On Finance Leases CashPaidOnFinanceLeases	1406000	USD
	twlo	Cash Paid On Finance Leases CashPaidOnFinanceLeases	0	USD
	twlo	Purchases Of Property Equipment And Intangible Assets Accrued But Not Paid PurchasesOfPropertyEquipmentAndIntangibleAssetsAccruedButNotPaid	1478000	USD
	twlo	Purchases Of Property Equipment And Intangible Assets Accrued But Not Paid PurchasesOfPropertyEquipmentAndIntangibleAssetsAccruedButNotPaid	785000	USD
	twlo	Payments For Capped Call Options PaymentsForCappedCallOptions	0	USD
	twlo	Payments For Capped Call Options PaymentsForCappedCallOptions	58465000	USD
	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	5400000	USD
	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	0	USD
	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	3927000	USD
	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	0	USD
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	40354000	USD
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	27052000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	4148000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1720000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1006029000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	503990000	USD
	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	0	USD
	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	105000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-174658000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	368526000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	505334000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	120788000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	330676000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	489314000	USD
CY2019Q3	twlo	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Capital Lease Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCapitalLeaseAssets	14173000	USD
CY2018Q3	twlo	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Capital Lease Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCapitalLeaseAssets	0	USD
	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	5711000	USD
	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	4434000	USD
	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	17700000	USD
CY2018Q3	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	3900000	USD
	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	11100000	USD
CY2019Q3	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	23600000	USD
	us-gaap	Nature Of Operations NatureOfOperations	Organization and Description of Business<div style="line-height:120%;padding-top:16px;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Twilio Inc. (the “Company”) was incorporated in the state of Delaware on March 13, 2008. The Company is the leader in the Cloud Communications Platform category and enables developers to build, scale and operate real-time communications within their software applications via simple-to-use Application Programming Interfaces (“API”). The power, flexibility, and reliability offered by the Company’s software building blocks empower entities of virtually every shape and size to build world-class engagement into their customer experience.</span></div><div style="line-height:120%;padding-top:16px;text-align:left;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The Company’s headquarters are located in San Francisco, California, and the Company has subsidiaries in Australia, Bermuda, Colombia, Czech Republic, Estonia, France, Germany, Hong Kong, Ireland, Japan, the Netherlands, Singapore, Spain, Sweden, United Kingdom and the United States.</span></div>
	us-gaap	Use Of Estimates UseOfEstimates	<span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Use of Estimates</span><div style="line-height:120%;padding-top:16px;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. These estimates are used for, but not limited to, revenue allowances and sales credit reserves; recoverability of long-lived and intangible assets; capitalization and useful life of the Company’s capitalized internal-use software development costs; fair value of acquired intangible assets and goodwill; accruals and contingencies. Estimates are based on historical experience and on various assumptions that the Company believes are reasonable under current circumstances. However, future events are subject to change and best estimates and judgments may require further adjustments; therefore, actual results could differ materially from those estimates. Management periodically evaluates such estimates and they are adjusted prospectively based upon such periodic evaluation.</span></div>
	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Concentration of Credit Risk</span><div style="line-height:120%;padding-top:16px;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Financial instruments that potentially expose the Company to a concentration of credit risk consist primarily of cash, cash equivalents, marketable securities and accounts receivable. The Company maintains cash, cash equivalents and marketable securities with financial institutions that management believes are financially sound and have minimal credit risk exposure although the balances will exceed insured limits.</span></div>The Company sells its services to a wide variety of customers. If the financial condition or results of operations of any significant customers deteriorate substantially, operating results could be adversely affected. To reduce credit risk, management performs credit evaluations of the financial condition of significant customers. The Company does not require collateral from its credit customers and maintains reserves for estimated credit losses on customer accounts when considered necessary. Actual credit losses may differ from the Company’s estimates.
CY2019Q3	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	2300000	USD
CY2018Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	9400000	USD
CY2019Q1	us-gaap	Deferred Rent Credit DeferredRentCredit	9000000.0	USD
CY2019Q3	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	1300000	USD
	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	2900000	USD
CY2018Q3	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	400000	USD
	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	900000	USD
CY2019Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	123500000	USD
CY2019Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	132000000.0	USD
CY2019Q3	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	255864000	USD
CY2019Q3	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	255864000	USD
CY2019Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1547155000	USD
CY2019Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	4226000	USD
CY2019Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	206000	USD
CY2019Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1551175000	USD
CY2019Q3	twlo	Debt Securities Available For Sale Privately Held Amortized Cost DebtSecuritiesAvailableForSalePrivatelyHeldAmortizedCost	5500000	USD
CY2019Q3	twlo	Debt Securities Available For Sale Privately Held Amortized Cost DebtSecuritiesAvailableForSalePrivatelyHeldAmortizedCost	5500000	USD
CY2019Q3	twlo	Financial Assets Amortized Cost Or Carrying Value FinancialAssetsAmortizedCostOrCarryingValue	1808519000	USD
CY2019Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	4226000	USD
CY2019Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	206000	USD
CY2019Q3	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	1812539000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	465217000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	465217000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	261468000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	23000	USD
CY2018Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	130000	USD
CY2018Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	233000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	261128000	USD
CY2018Q4	twlo	Financial Assets Amortized Cost Or Carrying Value FinancialAssetsAmortizedCostOrCarryingValue	726685000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	23000	USD
CY2018Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	130000	USD
CY2018Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	233000	USD
CY2018Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	726345000	USD
CY2019Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	0	USD
CY2019Q3	us-gaap	Investment Income Interest InvestmentIncomeInterest	7700000	USD
	us-gaap	Investment Income Interest InvestmentIncomeInterest	11800000	USD
CY2018Q3	us-gaap	Investment Income Interest InvestmentIncomeInterest	800000	USD
	us-gaap	Investment Income Interest InvestmentIncomeInterest	2200000	USD
CY2019Q3	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.052
CY2019Q3	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis	844301000	USD
CY2019Q3	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Fair Value AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	845578000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis	261468000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Fair Value AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	261128000	USD
CY2019Q3	twlo	Available For Sale Securities Debt Maturities Rolling Year Two Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoAmortizedCostBasis	702854000	USD
CY2019Q3	twlo	Available For Sale Securities Debt Maturities Rolling Year Two Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoFairValue	705597000	USD
CY2018Q4	twlo	Available For Sale Securities Debt Maturities Rolling Year Two Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoAmortizedCostBasis	0	USD
CY2018Q4	twlo	Available For Sale Securities Debt Maturities Rolling Year Two Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoFairValue	0	USD
CY2019Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1547155000	USD
CY2019Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1551175000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	261468000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	261128000	USD
CY2019Q3	us-gaap	Notes Receivable Fair Value Disclosure NotesReceivableFairValueDisclosure	5500000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	188807000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	108270000	USD
CY2019Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	70326000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	44736000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	118481000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	63534000	USD
CY2019Q3	us-gaap	Depreciation Depreciation	9700000	USD
	us-gaap	Depreciation Depreciation	26400000	USD
CY2018Q3	us-gaap	Depreciation Depreciation	5000000.0	USD
CY2019Q3	us-gaap	Capitalized Computer Software Additions CapitalizedComputerSoftwareAdditions	8800000	USD
	us-gaap	Depreciation Depreciation	13500000	USD
	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	4400000	USD
CY2018Q3	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	3600000	USD
	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	9300000	USD
	us-gaap	Capitalized Computer Software Additions CapitalizedComputerSoftwareAdditions	22500000	USD
CY2018Q3	us-gaap	Capitalized Computer Software Additions CapitalizedComputerSoftwareAdditions	6700000	USD
	us-gaap	Capitalized Computer Software Additions CapitalizedComputerSoftwareAdditions	19800000	USD
CY2019Q3	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	2500000	USD
	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	5700000	USD
CY2018Q3	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	1500000	USD
CY2019Q3	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	4400000	USD
	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	12500000	USD
CY2019Q3	us-gaap	Property Subject To Or Available For Operating Lease Number Of Units PropertySubjectToOrAvailableForOperatingLeaseNumberOfUnits	21	property
CY2019Q3	us-gaap	Lessee Operating Lease Renewal Term LesseeOperatingLeaseRenewalTerm	P5Y
CY2019Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	8336000	USD
	us-gaap	Operating Lease Cost OperatingLeaseCost	23782000	USD
CY2019Q3	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1610000	USD
	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	4299000	USD
CY2019Q3	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	175000	USD
	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	512000	USD
CY2019Q3	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1748000	USD
	us-gaap	Short Term Lease Cost ShortTermLeaseCost	5088000	USD
CY2019Q3	us-gaap	Variable Lease Cost VariableLeaseCost	1002000	USD
	us-gaap	Variable Lease Cost VariableLeaseCost	2569000	USD
CY2019Q3	us-gaap	Lease Cost LeaseCost	12871000	USD
	us-gaap	Lease Cost LeaseCost	36250000	USD
CY2019Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	148069000	USD
CY2019Q3	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	13855000	USD
CY2019Q3	twlo	Lease Right Of Use Asset LeaseRightOfUseAsset	161924000	USD
CY2019Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	22211000	USD
CY2019Q3	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	6509000	USD
CY2019Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	134755000	USD
CY2019Q3	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	8174000	USD
CY2019Q3	twlo	Lease Liability LeaseLiability	171649000	USD
CY2019Q3	twlo	Lessee Operating Lease Accumulated Amortization LesseeOperatingLeaseAccumulatedAmortization	16800000	USD
CY2019Q3	twlo	Lessee Finance Lease Accumulated Depreciation LesseeFinanceLeaseAccumulatedDepreciation	4700000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	20316000	USD
CY2019Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.058
CY2019Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y7M6D
CY2019Q3	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P2Y10M24D
	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	491000	USD
	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	3927000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	6539000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Remainder Of Fiscal Year FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear	1892000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	31524000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	6793000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	29385000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	3905000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	28327000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	1579000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	27843000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	890000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	68521000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	897000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	192139000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	15956000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	35173000	USD
CY2019Q3	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	1273000	USD
CY2019Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	156966000	USD
CY2019Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	14683000	USD
CY2019Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	22211000	USD
CY2019Q3	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	6509000	USD
CY2019Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	134755000	USD
CY2019Q3	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	8174000	USD
CY2018Q3	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	2200000	USD
	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	6400000	USD
CY2019Q3	twlo	Lessee Operating Lease Lease Not Yet Commenced Liability LesseeOperatingLeaseLeaseNotYetCommencedLiability	58900000	USD
CY2019Q3	twlo	Lessee Finance Lease Lease Not Yet Commenced Liability LesseeFinanceLeaseLeaseNotYetCommencedLiability	700000	USD
	twlo	Lessee Lease Lease Not Yet Commenced Term Of Contract LesseeLeaseLeaseNotYetCommencedTermOfContract	P6Y9M18D
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Remainder Of Fiscal Year OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear	24128000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Remainder Of Fiscal Year CapitalLeasesFutureMinimumPaymentsRemainderOfFiscalYear	306000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	29527000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	512000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	30898000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	573000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	30492000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Four Years CapitalLeasesFutureMinimumPaymentsDueInFourYears	590000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	30122000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	608000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	81316000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due Thereafter CapitalLeasesFutureMinimumPaymentsDueThereafter	1939000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	226483000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due CapitalLeasesFutureMinimumPaymentsDue	4528000	USD
CY2019Q2	twlo	Business Combination Consideration Transferred Amount Held For Tax Liabilities BusinessCombinationConsiderationTransferredAmountHeldForTaxLiabilities	200000	USD
CY2019Q2	us-gaap	Indefinite Lived Intangible Assets Purchase Accounting Adjustments IndefiniteLivedIntangibleAssetsPurchaseAccountingAdjustments	-7000000.0	USD
	twlo	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Release Of Valuation Allowance On Deferred Tax Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedReleaseOfValuationAllowanceOnDeferredTaxAssets	50000000.0	USD
CY2019Q3	twlo	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Release Of Valuation Allowance On Deferred Tax Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedReleaseOfValuationAllowanceOnDeferredTaxAssets	1400000	USD
	twlo	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Release Of Valuation Allowance On Deferred Tax Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedReleaseOfValuationAllowanceOnDeferredTaxAssets	50000000.0	USD
CY2018Q3	twlo	Unrecognized Tax Benefits Increase Resultingfrom Ongoing Benefit UnrecognizedTaxBenefitsIncreaseResultingfromOngoingBenefit	1400000	USD
	twlo	Unrecognized Tax Benefits Increase Resultingfrom Ongoing Benefit UnrecognizedTaxBenefitsIncreaseResultingfromOngoingBenefit	21100000	USD
CY2019Q3	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	295066000	USD
CY2018Q3	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	206093000	USD
	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	816990000	USD
	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	551207000	USD
CY2019Q3	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	-81088000	USD
CY2018Q3	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	-61550000	USD
	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	-236928000	USD
	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	-134889000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	38165000	USD
	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	2246398000	USD
	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-1176000	USD
CY2019Q3	us-gaap	Goodwill Goodwill	2283387000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	532253000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	67293000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	464960000	USD
CY2019Q3	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	532548000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	464960000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	67293000	USD
CY2019Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	465255000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	41382000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	14119000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	27263000	USD
CY2018Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	41677000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	14119000	USD
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	27558000	USD
CY2019Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	20000000.0	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	52900000	USD
CY2018Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1900000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4700000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear	19774000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	78079000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	76567000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	74801000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	72309000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	143430000	USD
CY2019Q3	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	21916000	USD
CY2018Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	9886000	USD
CY2019Q3	us-gaap	Accrued Bonuses Current AccruedBonusesCurrent	10524000	USD
CY2018Q4	us-gaap	Accrued Bonuses Current AccruedBonusesCurrent	8564000	USD
CY2019Q3	twlo	Accrued Cost Of Revenue Current AccruedCostOfRevenueCurrent	38724000	USD
CY2019Q3	us-gaap	Other Accrued Liabilities Noncurrent OtherAccruedLiabilitiesNoncurrent	2350000	USD
CY2018Q4	us-gaap	Other Accrued Liabilities Noncurrent OtherAccruedLiabilitiesNoncurrent	959000	USD
CY2019Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	14341000	USD
CY2019Q3	us-gaap	Capital Lease Obligations Noncurrent CapitalLeaseObligationsNoncurrent	0	USD
CY2018Q4	us-gaap	Capital Lease Obligations Noncurrent CapitalLeaseObligationsNoncurrent	2170000	USD
CY2018Q4	twlo	Accrued Cost Of Revenue Current AccruedCostOfRevenueCurrent	29901000	USD
CY2019Q3	us-gaap	Taxes Payable Current TaxesPayableCurrent	30157000	USD
CY2018Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	23631000	USD
CY2019Q3	us-gaap	Other Employee Related Liabilities Current OtherEmployeeRelatedLiabilitiesCurrent	9297000	USD
CY2018Q4	us-gaap	Other Employee Related Liabilities Current OtherEmployeeRelatedLiabilitiesCurrent	2672000	USD
CY2019Q3	us-gaap	Deferred Rent Credit Current DeferredRentCreditCurrent	0	USD
CY2018Q4	us-gaap	Deferred Rent Credit Current DeferredRentCreditCurrent	1418000	USD
CY2019Q3	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	4326000	USD
CY2018Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	2217000	USD
CY2019Q3	us-gaap	Business Combination Contingent Consideration Liability Current BusinessCombinationContingentConsiderationLiabilityCurrent	2240000	USD
CY2018Q4	us-gaap	Business Combination Contingent Consideration Liability Current BusinessCombinationContingentConsiderationLiabilityCurrent	0	USD
CY2019Q3	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	18360000	USD
CY2018Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	18054000	USD
CY2019Q3	twlo	Accrued Liabilities And Other Liabilities Current AccruedLiabilitiesAndOtherLiabilitiesCurrent	135544000	USD
CY2018Q4	twlo	Accrued Liabilities And Other Liabilities Current AccruedLiabilitiesAndOtherLiabilitiesCurrent	96343000	USD
CY2019Q3	us-gaap	Deferred Rent Credit Noncurrent DeferredRentCreditNoncurrent	0	USD
CY2018Q4	us-gaap	Deferred Rent Credit Noncurrent DeferredRentCreditNoncurrent	7569000	USD
CY2019Q3	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	7711000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	5181000	USD
CY2019Q3	twlo	Business Combination Consideration Holdback Non Current BusinessCombinationConsiderationHoldbackNonCurrent	4280000	USD
CY2018Q4	twlo	Business Combination Consideration Holdback Non Current BusinessCombinationConsiderationHoldbackNonCurrent	2290000	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	18169000	USD
CY2019Q3	us-gaap	Debt Instrument Interest Rate Effective Percentage DebtInstrumentInterestRateEffectivePercentage	0.057
CY2018Q2	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	2536000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	4945000	USD
CY2019Q2	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	4773000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1033000	USD
CY2019Q3	twlo	Provision For Doubtful Accounts And Other ProvisionForDoubtfulAccountsAndOther	676000	USD
CY2018Q3	twlo	Provision For Doubtful Accounts And Other ProvisionForDoubtfulAccountsAndOther	1111000	USD
	twlo	Provision For Doubtful Accounts And Other ProvisionForDoubtfulAccountsAndOther	1057000	USD
	twlo	Provision For Doubtful Accounts And Other ProvisionForDoubtfulAccountsAndOther	2626000	USD
CY2019Q3	twlo	Provision For Doubtful Accounts Assumed In Acquisition ProvisionForDoubtfulAccountsAssumedInAcquisition	0	USD
CY2018Q3	twlo	Provision For Doubtful Accounts Assumed In Acquisition ProvisionForDoubtfulAccountsAssumedInAcquisition	0	USD
	twlo	Provision For Doubtful Accounts Assumed In Acquisition ProvisionForDoubtfulAccountsAssumedInAcquisition	59000	USD
	twlo	Provision For Doubtful Accounts Assumed In Acquisition ProvisionForDoubtfulAccountsAssumedInAcquisition	0	USD
CY2019Q3	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	114000	USD
CY2018Q3	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	5000	USD
CY2019Q2	us-gaap	Share Price SharePrice	124.00
CY2018Q4	us-gaap	Common Stock Capital Shares Reserved For Future Issuance CommonStockCapitalSharesReservedForFutureIssuance	39692245	shares
CY2019Q3	us-gaap	Litigation Reserve LitigationReserve	1700000	USD
CY2019Q3	us-gaap	Payments For Legal Settlements PaymentsForLegalSettlements	1700000	USD
CY2019Q3	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	26200000	USD
	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	726000	USD
	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	17000	USD
CY2019Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	5335000	USD
CY2018Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	3642000	USD
CY2019Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	5335000	USD
CY2018Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	3642000	USD
CY2019Q3	twlo	Allowance For Doubtful Account Percent Of Revenue AllowanceForDoubtfulAccountPercentOfRevenue	0.02
CY2018Q3	twlo	Allowance For Doubtful Account Percent Of Revenue AllowanceForDoubtfulAccountPercentOfRevenue	0.02
	twlo	Allowance For Doubtful Account Percent Of Revenue AllowanceForDoubtfulAccountPercentOfRevenue	0.01
	twlo	Allowance For Doubtful Account Percent Of Revenue AllowanceForDoubtfulAccountPercentOfRevenue	0.01
CY2019Q3	twlo	Sales Credit Reserve Percent Of Revenue SalesCreditReservePercentOfRevenue	0.02
CY2018Q3	twlo	Sales Credit Reserve Percent Of Revenue SalesCreditReservePercentOfRevenue	0.02
	twlo	Sales Credit Reserve Percent Of Revenue SalesCreditReservePercentOfRevenue	0.01
	twlo	Sales Credit Reserve Percent Of Revenue SalesCreditReservePercentOfRevenue	0.01
CY2019Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	295066000	USD
CY2018Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	168895000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	803244000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	445765000	USD
CY2019Q3	twlo	Unrecorded Unconditional Purchase Obligations Additions UnrecordedUnconditionalPurchaseObligationsAdditions	4500000	USD
	twlo	Unrecorded Unconditional Purchase Obligations Additions UnrecordedUnconditionalPurchaseObligationsAdditions	15600000	USD
CY2019Q1	us-gaap	Litigation Settlement Amount Awarded To Other Party LitigationSettlementAmountAwardedToOtherParty	10000000.0	USD
CY2019Q3	us-gaap	Common Stock Capital Shares Reserved For Future Issuance CommonStockCapitalSharesReservedForFutureIssuance	47659704	shares
CY2018Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	22600000	USD
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	100000000	shares
CY2019Q3	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2019Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2019Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2019Q2	us-gaap	Proceeds From Issuance Initial Public Offering ProceedsFromIssuanceInitialPublicOffering	979000000.0	USD
CY2019Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Additional Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized	1000802	shares
CY2018Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Additional Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized	939698	shares
CY2019Q3	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions	1000000.0	USD
	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P0Y1M6D
	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	96359437	shares
CY2019Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	68268000	USD
CY2018Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	22741000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	197332000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	61287000	USD
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-87734000	USD
CY2018Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-27056000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-216816000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-74791000	USD
CY2019Q3	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	136400739	shares
CY2018Q3	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	98019629	shares
	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	127506529	shares
CY2019Q3	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.64
CY2018Q3	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.28
	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-1.70
	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.78
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	21208559	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	16932419	shares
CY2019Q3	us-gaap	Debt Instrument Convertible Conversion Price1 DebtInstrumentConvertibleConversionPrice1	70.90
CY2019Q3	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	-2500000	USD
	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	-55200000	USD

Files In Submission

Name	View Source	Status
0001447669-19-000028-index-headers.html	Edgar Link	pending
0001447669-19-000028-index.html	Edgar Link	pending
0001447669-19-000028.txt	Edgar Link	pending
0001447669-19-000028-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending
twiliologored2a01.jpg	Edgar Link	pending
twlo-20190930.xsd	Edgar Link	pending
twlo-20190930ex101.htm	Edgar Link	pending
twlo-20190930ex312.htm	Edgar Link	pending
twlo-20190930x10q.htm	Edgar Link	pending
twlo-20190930x10q_htm.xml	Edgar Link	completed
twlo-20190930xex311.htm	Edgar Link	pending
twlo-20190930xex321.htm	Edgar Link	pending
twlo-20190930_cal.xml	Edgar Link	unprocessable
twlo-20190930_def.xml	Edgar Link	unprocessable
twlo-20190930_lab.xml	Edgar Link	unprocessable
twlo-20190930_pre.xml	Edgar Link	unprocessable
twlo-2019x0930ex102.htm	Edgar Link	pending

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$TWLO
Twilio Inc Stock $twlo

2019 Q3 Form 10-Q Financial Statement

#000144766919000028 Filed on October 31, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$TWLO Twilio Inc Stock $twlo

2019 Q3 Form 10-Q Financial Statement

#000144766919000028 Filed on October 31, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$TWLO
Twilio Inc Stock $twlo