Supplemental Cash Flow Information [Abstract] Supplemental Cash Flow Information [Abstract] State Current State and Local Tax Expense (Benefit) Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Leasehold improvements Leasehold Improvements [Member] Percentage of revenue by geographic area: Risks and Uncertainties [Abstract] Purchase price components Schedule of Business Acquisitions, by Acquisition [Table Text Block] Short-term marketable securities Debt Securities, Available-for-sale, Current Preferred stock, outstanding (in shares) Preferred Stock, Shares Outstanding Acquisition related costs Business Combination, Acquisition Related Costs Other Intangible Assets Other Intangible Assets [Member] Capitalized software Deferred Tax Liabilities, Deferred Expense, Capitalized Software Security Exchange Name Security Exchange Name Conversion price (in dollars per share) Debt Instrument, Convertible, Conversion Price Forfeited and canceled (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Forfeited and cancelled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Foreign Currency Translation Foreign Currency Transactions and Translations Policy [Policy Text Block] Votes per share Common Stock, Votes per Share Number of votes per common share a shareholder is entitled. Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Investment, Name [Axis] Investment, Name [Axis] Derivatives and Hedging Derivatives, Policy [Policy Text Block] Stock-based awards available for grant under 2016 Plan (in shares) Shares available for future issuance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Acquired Finite-Lived Intangible Assets [Line Items] Acquired Finite-Lived Intangible Assets [Line Items] Acquired intangibles Deferred Tax Liabilities, Intangible Assets Aggregate intrinsic value of stock options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Measurement period adjustments Goodwill, Purchase Accounting Adjustments Accrued bonus and commission Accrued Bonuses, Current Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Operating lease liability Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Operating Lease Liability Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Operating Lease Liability Deferred tax liability Deferred tax liability Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Amortization expense Amortization of Intangible Assets Gross increases for tax positions of prior years Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Employee and nonemployee stock options Employee And Nonemployee Stock Option [Member] Employee and Nonemployee Stock Options. Proceeds from issuance of senior notes due 2029 and 2031 Proceeds from Issuance of Senior Long-term Debt Antidilutive securities (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Revenue recognized out of adjusted deferred revenue balance Contract with Customer, Liability, Revenue Recognized Research and development Research and Development Expense [Member] One to three years, aggregate fair value Available-for-sale Securities, Debt Maturities, Rolling Year Two, Fair Value Fair value of available-for-sale debt securities maturing in the second rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Subsequent Events [Abstract] Subsequent Events [Abstract] Net deferred tax assets Deferred Tax Assets, Net of Valuation Allowance Business Combination and Asset Acquisition [Abstract] Business Acquisition [Axis] Business Acquisition [Axis] Cash Flow Hedge Cash Flow Hedging [Member] Award Type [Domain] Award Type [Domain] Intangible Assets Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Local Phone Number Local Phone Number Weighted- average remaining contractual term (In years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Operating Loss Carryforwards [Line Items] Operating Loss Carryforwards [Line Items] Other long-term liabilities Increase (Decrease) in Other Noncurrent Liabilities Schedule of contractual maturities of marketable securities Investments Classified by Contractual Maturity Date [Table Text Block] Preferred stock, $0.001 par value, 100,000,000 shares authorized, none issued Preferred Stock, Value, Issued Consecutive trading period Debt Instrument, Convertible, Threshold Consecutive Trading Days Accumulated Deficit Retained Earnings [Member] Proceeds from settlements of capped call, net of settlement costs Proceeds from Derivative Instrument, Financing Activities Right-of-use asset Deferred Tax Liabilities, Leasing Arrangements Equity component from partial settlement of convertible senior notes due 2023 Stock Issued During Period, Value, Conversion of Convertible Securities Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Redemption Period Four Debt Instrument, Redemption, Period Four [Member] Accounts receivable Increase (Decrease) in Accounts Receivable Purchases of property and equipment through finance leases Capital Expenditures Incurred but Not yet Paid Derivative Instruments and Hedging Activities Disclosure [Abstract] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Value of equity awards withheld for tax liability (in shares) Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Debt instrument, maximum redemption price as a percentage of principal 180 days after equity offer Debt Instrument, Maximum Redemption Price As A Percentage Of Principal 180 Days After Equity Offer Debt Instrument, Maximum Redemption Price As A Percentage Of Principal 180 Days After Equity Offer Deferred revenue Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Net loss per share attributable to common stockholders, basic (in dollars per share) Earnings Per Share, Basic Revenue by Geographic Area Revenue from Contract with Customer [Text Block] Unvested restricted stock units issued and outstanding (in shares) Unvested RSUs at the beginning of the period (in shares) Unvested RSUs at the end of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Geographic Concentration Risk Geographic Concentration Risk [Member] Capped Call Arrangement Capped Call Arrangement [Member] Capped Call Arrangement Total net capitalized costs Capitalized Contract Cost, Net Commercial paper Commercial Paper [Member] Net deferred tax liability Deferred Tax Liabilities, Net Property and equipment Deferred Tax Liabilities, Property, Plant and Equipment 2022 Unrecorded Unconditional Purchase Obligation, to be Paid, Year One Losses recognized in OCI Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Value of common stock issued and equity awards assumed in acquisition Noncash or Part Noncash Acquisition, Value of Liabilities Assumed Redemption Period Two Debt Instrument, Redemption, Period Two [Member] Entity Voluntary Filers Entity Voluntary Filers Total estimated grant date fair value of options vested Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value Permanent book vs. tax differences Effective Income Tax Rate Reconciliation, Permanent Differences, Percent Effective Income Tax Rate Reconciliation, Permanent Differences, Percent Plan Name [Axis] Plan Name [Axis] Fair Value Measurements, Financial Assets Assets, Fair Value Disclosure [Abstract] Business combination, contingent consideration. term Business Combination, Contingent Consideration, Term Business Combination, Contingent Consideration, Term Long-term debt Net carrying amount Long-term Debt Level 1 Fair Value, Inputs, Level 1 [Member] CASH FLOWS FROM INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities [Abstract] Goodwill, impairment loss Goodwill, Impairment Loss Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Entity Small Business Entity Small Business Conversion of shares of Class B common stock into shares of Class A common stock (in shares) Conversion of Stock, Shares Converted Gross increases for tax positions of current year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Intangible Assets Finite-Lived Intangible Assets [Line Items] Maximum automatic annual increase (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Maximum Annual Increase in Number of Shares Authorized The maximum automatic annual increase in the number of shares (or other type of equity) approved for awards under the equity-based compensation plan. LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Unrecognized tax benefits that would impact effective tax rate if recognized Unrecognized Tax Benefits that Would Impact Effective Tax Rate Proceeds from public offerings, net of underwriters' discount and issuance costs Proceeds from Issuance Initial Public Offering Accounts payable Increase (Decrease) in Accounts Payable Convertible Senior Notes0.25 Percent Due2023 Convertible Senior Notes0.25 Percent Due2023 [Member] Represents convertible senior notes that bear an interest rate of 0.25 percent and will mature in 2023. Hedging Relationship [Domain] Hedging Relationship [Domain] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] Principal payments on debt and finance leases Repayment of Long-term Debt, Long-term Lease Obligation, and Capital Security Entity Interactive Data Current Entity Interactive Data Current 2025 Finite-Lived Intangible Asset, Expected Amortization, Year Four Capitalized Contract Cost [Table] Capitalized Contract Cost [Table] Exercises of stock options Stock Issued During Period, Value, Stock Options Exercised Stockholders' Equity Class of Stock Disclosures [Abstract] Conversion ratio Debt Instrument, Convertible, Conversion Ratio Unrecognized tax benefit, beginning of year Unrecognized tax benefit, end of year Unrecognized tax benefits Unrecognized Tax Benefits Gross deferred tax assets Deferred Tax Assets, Gross Income Tax Authority [Domain] Income Tax Authority [Domain] Summary of Operating Loss Carryforwards Summary of Operating Loss Carryforwards [Table Text Block] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Gross Unrealized Gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Entity Address, State or Province Entity Address, State or Province Shares of Class A common stock issued in acquisition Stock Issued During Period, Value, Acquisitions Current liabilities: Liabilities, Current [Abstract] Operating lease liabilities Increase (Decrease) in Operating Lease Liability General and administrative General and Administrative Expense Other Acquisitions Other Acquisitions [Member] Other Acquisitions [Member] Vesting of restricted stock units Stock Issued During Period, Value, Restricted Stock Award, Gross Property and Equipment Property, Plant and Equipment, Net, by Type [Abstract] Deferred Sales Commissions Capitalized Contract Cost [Line Items] Accounting Policies [Abstract] Accounting Policies [Abstract] Non-U.S. government securities Debt Security, Government, Non-US [Member] Weighted-average remaining contractual term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Derivative Instrument [Axis] Derivative Instrument [Axis] Amortization period for deferred incremental commission costs of obtaining new contracts Capitalized Contract Cost, Amortization Period Other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Federal Current Federal Tax Expense (Benefit) Total operating lease obligations Operating Lease, Liability Document Transition Report Document Transition Report Authorized shares 1,100,000,000 as of December 31, 2021 and 2020; Issued and outstanding shares 180,468,099 and 164,047,524 as of December 31, 2021 and 2020 Common Stock, Value, Issued Weighted-average period (in years) Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Unvested RSUs at the beginning of the period (in dollars per share) Unvested RSUs at the end of the period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Right-of-Use Assets and Lease Liabilities Lessee, Operating Leases [Text Block] Class A common stock reserved for Twilio.org (in shares) Common Stock, Capital Shares Reserved for Future Issuance, Donor-advised Fund Number of common shares reserved for issuance in relation to a donor-advised fund. Number of consecutive trading days of threshold Notes trading price for conversion eligibility to follow Debt Instrument, Conversion Eligibility Based on Debt Trading Price, Consecutive Trading Days Number of consecutive trading days for which the trading price of the debt must meet specified criteria to trigger conversion eligibility for a number of trading days following this consecutive trading day period. Business Combinations Business Combination Disclosure [Text Block] Shares of Class A common stock donated to charity (in shares) Stock Issued During Period, Shares, Donor Advised Fund Stock Issued During Period, Shares, Donor Advised Fund ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Schedule of valuation assumptions, options Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Product Concentration Risk Product Concentration Risk [Member] Sell Short [Member] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Foreign Deferred Foreign Income Tax Expense (Benefit) Class of Stock [Axis] Class of Stock [Axis] Accrued taxes Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Net loss attributable to common stockholders Business Acquisition, Pro Forma Net Income (Loss) Accrued Expenses and Other Liabilities Accrued Liabilities and Other Liabilities Disclosure [Text Block] The entire disclosure for accrued expenses and other liabilities. Convertible Senior Notes Due2023 Convertible Senior Notes Due2023 [Member] Represents convertible senior notes that will mature in 2023. Aggregate proceeds from stock offering Sale of Stock, Consideration Received on Transaction Income Tax Authority [Axis] Income Tax Authority [Axis] Senior Notes 3.625 Percent Due 2029 Senior Notes 3.625 Percent Due 2029 [Member] Senior Notes 3.625 Percent Due 2029 Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Revenue Revenue from Contract with Customer, Excluding Assessed Tax Stock-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Term of non-cancellable agreement Unrecorded Unconditional Purchase Obligation, Term Net Loss Per Share Attributable to Common Stockholders Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Capitalized internal use software development costs Capitalized Computer Software, Additions Employee stock options Share-based Payment Arrangement, Option [Member] Issuance costs Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Comprehensive Loss Comprehensive Income, Policy [Policy Text Block] Depreciable property Deferred Tax Assets, Property, Plant and Equipment Credits Effective Income Tax Rate Reconciliation, Tax Credit, Percent Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Document Fiscal Year Focus Document Fiscal Year Focus Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Additional Paid-In Capital Additional Paid-in Capital [Member] Revenues Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Total payments Unrecorded Unconditional Purchase Obligation Sales credit reserve Contract With Customer Liability Promotions [Member] Liability for certain customer discounts and rewards for which consideration for transfer good or service has been received or is receivable. Entity Information [Line Items] Entity Information [Line Items] Foreign Currency Fair Value Hedge Derivative [Line Items] Foreign Currency Fair Value Hedge Derivative [Line Items] Other (expenses) income, net Other Nonoperating Income (Expense) Fair value of the notes Long-term Debt, Fair Value Senior Notes 3.875 Percent Due 2031 Senior Notes 3.875 Percent Due 2031 [Member] Senior Notes 3.875 Percent Due 2031 Maximum Maximum [Member] Share-based Payment Arrangement [Abstract] Share-based Payment Arrangement [Abstract] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Award Type [Axis] Award Type [Axis] CASH FLOWS FROM FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities [Abstract] Lessee, Operating Lease, Liability, Maturity Lessee, Operating Lease, Liability, Maturity [Table Text Block] Total stockholders’ equity Balance Balance Stockholders' Equity Attributable to Parent City Area Code City Area Code Restricted cash in other current assets Restricted Cash and Cash Equivalents, Current Designated as Cash Flow Hedges Designated as Hedging Instrument [Member] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Value of common stock issued to settle convertible senior notes due 2023 Debt Conversion, Converted Instrument, Amount Property, plant and equipment, estimated life Property, Plant and Equipment, Useful Life Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Capitalized computer software, amortization period Capitalized Computer Software, Amortization Period Capitalized Computer Software, Amortization Period Concentration of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Operating lease liability, noncurrent Long-term operating lease obligations Operating Lease, Liability, Noncurrent Total Current Income Tax Expense (Benefit) Principal Debt Instrument, Face Amount Expected volatility, high end of range (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Term of lease Lessee, Operating Lease, Term of Contract Restricted stock units issued and outstanding Restricted Stock Units (RSUs) [Member] Conversion of shares of Class B common stock into shares of Class A common stock Conversion of Stock, Amount Converted Schedule of purchase price allocation Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Additions SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Other Account ESPP contributions Other Employee-related Liabilities, Current Business Acquisition [Line Items] Business Acquisition [Line Items] Business Acquisition [Line Items] RECONCILIATION OF CASH, CASH EQUIVALENTS AND RESTRICTED CASH TO THE CONSOLIDATED BALANCE SHEETS Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract] Income Statement [Abstract] Income Statement [Abstract] Entity Registrant Name Entity Registrant Name Accounts receivable and other current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Deductions against reserve SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction Schedule of the sales credit reserve Sales Credit Reserve [Table Text Block] Tabular disclosure of the sales credit reserve. Forfeited and cancelled (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Benefit for income taxes Income tax benefit Income Tax Expense (Benefit) Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Total financial assets Financial Assets, Amortized Cost or Carrying Value The aggregate of carrying value for assets with carrying value that approximates fair value and amortized cost basis for assets carried at fair value. Entity Tax Identification Number Entity Tax Identification Number Document Fiscal Period Focus Document Fiscal Period Focus Total current assets Assets, Current Total lease payments Lessee, Operating Lease, Liability, to be Paid Forfeited and canceled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Assumed in acquisition (in dollars per share) Share-Based Compensation Arrangements By Share-Based Payment Award, Options, Shares Assumed In Acquisition, Weighted Average Exercise Price Share-based Compensation Arrangements by Share-based Payment Award, Options, Shares Assumed in Acquisition, Weighted Average Exercise Price Stock-based Compensation Share-based Payment Arrangement [Policy Text Block] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested Change of control event Debt Instrument, Redemption, Period, Change Of Control Event [Member] Debt Instrument, Redemption, Period, Change Of Control Event Unrecognized compensation cost, options Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Recapitalization of a subsidiary Recapitalization Of Subsidiaries Recapitalization Of Subsidiaries Stock-based compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Percent Unrecognized compensation cost, other than options Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Revenue Benchmark Revenue Benchmark [Member] Weighted-average grant date fair value per share of options granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Equity Component [Domain] Equity Component [Domain] Prepaid expenses Deferred Tax Liabilities, Prepaid Expenses 2022 Lessee, Operating Lease, Liability, to be Paid, Year One Debt issuance costs, gross Debt Issuance Costs, Gross Fair value of Class A common stock transferred Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Property and equipment, net Total property and equipment, net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Shares issued in acquisition (in shares) Stock Issued During Period, Shares, Acquisitions Deferred commissions Deferred Tax Liabilities, Deferred Commissions Amount of deferred tax liability attributable to taxable temporary differences from deferred commissions. Revenue, remaining performance obligation, amount Revenue, Remaining Performance Obligation, Amount Purchases of marketable securities and other investments Payments to acquire investments Payments to Acquire Investments Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Intangible assets, gross Intangible Assets, Gross (Excluding Goodwill) 2025 Lessee, Operating Lease, Liability, to be Paid, Year Four Finance lease liability, current Finance Lease, Liability, Current Stock Based Compensation Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized [Abstract] Loss before benefit for income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Level 2 Fair Value, Inputs, Level 2 [Member] Weighted average remaining contractual term Business Combination, Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options Outstanding, Weighted Average Remaining Contractual Terms Business Combination, Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options Outstanding, Weighted Average Remaining Contractual Terms Auditor Location Auditor Location Amortized Cost or Carrying Value Debt Securities, Available-for-sale, Amortized Cost Intangible assets, estimated life Finite-Lived Intangible Asset, Useful Life Use of Estimates Use of Estimates, Policy [Policy Text Block] Schedule of the calculation of basic and diluted net loss per share attributable to common stockholders Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Total other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Title of 12(b) Security Title of 12(b) Security Investment, Name [Domain] Investment, Name [Domain] Common stock, authorized (in shares) Common Stock, Shares Authorized Options vested and exercisable - weighted-average remaining contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term Indefinite-lived Intangible Assets Acquired as Part of Business Combination [Table] Indefinite-lived Intangible Assets Acquired as Part of Business Combination [Table] Net loss attributable to common stockholders, diluted (in thousands) Net Income (Loss) Available to Common Stockholders, Diluted Net loss attributable to common stockholders, basic (in thousands) Net Income (Loss) Available to Common Stockholders, Basic Document Type Document Type Schedule of restricted stock unit activity Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Acquisition Business Combination, Consideration Transferred [Abstract] Product and Service [Domain] Product and Service [Domain] Maximum automatic annual increase as a percentage of outstanding common shares Share-based Compensation Arrangement by Share-based Payment Award, Maximum Annual Increase in Authorization, Percentage of Outstanding Shares The maximum automatic annual increase in the number of shares (or other type of equity) approved for awards under the equity-based compensation plan, as a percentage of the outstanding shares of the entity's common stock at the end of the prior fiscal year. Supplemental Balance Sheet Information Supplemental Balance Sheet Disclosures [Text Block] Interest rate (as a percent) Debt Instrument, Interest Rate, Stated Percentage Renewal option Lessee, Operating Lease, Renewal Term Business combination, contingent consideration Business Combination, Contingent Consideration, Liability Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Taxes payable, jurisdictional estimate Taxes Payable, Jurisdictional Estimate Taxes Payable, Jurisdictional Estimate Lease, Cost Lease, Cost [Table Text Block] Geographical [Axis] Geographical [Axis] State and Local Jurisdiction State and Local Jurisdiction [Member] Offering price per share (in dollars per share) Sale of Stock, Price Per Share Minimum sale price of stock as a percentage of the conversion price Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Hedging Relationship [Axis] Hedging Relationship [Axis] Subsequent Events Subsequent Events [Text Block] One to three years, amortized cost Available-for-sale Securities, Debt Maturities, Rolling Year Two, Amortized Cost Basis Amount after adjustments of available-for-sale debt securities at cost, maturing in the second rolling twelve months following the latest balance sheet. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Cost of revenue Cost of Revenue Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Telecommunication licenses Telecommunication Licenses [Member] Telecommunication Licenses [Member] Minimum grant price as a percentage of fair market value per share of the underlying common stock on the date of grant (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Grant Price as Percentage of Fair Market Value of Common Stock, Minimum For a share-based compensation arrangement, the minimum grant price per share as a percentage of the underlying value of common stock on the date of grant. Fair Value Measurements Fair Value Disclosures [Text Block] Concentration Risk Type [Axis] Concentration Risk Type [Axis] 2024 Finite-Lived Intangible Asset, Expected Amortization, Year Three Stock-Based Compensation Expense Share-based Payment Arrangement, Expensed and Capitalized, Amount [Abstract] Foreign Tax Authority Foreign Tax Authority [Member] Proceeds from settlements of capped call, net of settlement costs Proceeds from Convertible Debt Business Combinations Business Combinations Policy [Policy Text Block] Accounts payable and other liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Document Period End Date Document Period End Date Number of reporting units Number of Reporting Units Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Number of options outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] State tax, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent State Deferred State and Local Income Tax Expense (Benefit) 2025 Unrecorded Unconditional Purchase Obligation, to be Paid, Year Four Schedule of property and equipment Property, Plant and Equipment [Table Text Block] Research and development credits Deferred Tax Assets, Tax Credit Carryforwards, Research Income Statement Location [Domain] Income Statement Location [Domain] Increase in shares available for grant (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Long-term Purchase Commitment [Line Items] Long-term Purchase Commitment [Line Items] Foreign Currency Fair Value Hedge Derivative [Table] Foreign Currency Fair Value Hedge Derivative [Table] Total operating expenses Operating Expenses Schedule of total estimated future amortization expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Earnings Per Share [Abstract] Earnings Per Share [Abstract] Fair value of Class A common stock transferred including unvested stock Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Including Unvested Portion Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Including Unvested Portion Foreign currency translation Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Revenue from Contract with Customer Benchmark Revenue from Contract with Customer Benchmark [Member] Revenue, remaining performance obligation, percentage Revenue, Remaining Performance Obligation, Percentage Trademarks and other Trademarks [Member] Schedule of weighted average grant date fair value Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block] Loss contingency accrual Loss Contingency Accrual Lease liability Deferred Tax Asset, Lease Liability Deferred Tax Asset, Lease Liability Outstanding options as of the beginning of the period (in dollars per share) Outstanding options as of the end of the period (in dollars per share) Outstanding options (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Patent Patents [Member] Finance lease asset, accumulated amortization Finance Lease, Right-of-Use Asset, Accumulated Amortization Entity Current Reporting Status Entity Current Reporting Status Expected volatility, low end of range (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Weighted- average grant date fair value (Per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Effective tax rate Effective Income Tax Rate Reconciliation, Percent 2008 Stock Option Plan Stock Option Plan2008 [Member] 2008 Stock Option Plan. Indemnification Agreement Indemnification Agreement [Member] Net amortization of investment premium and discount Accretion (Amortization) of Discounts and Premiums, Investments Amortization of debt discount and issuance costs Amortization of Debt Issuance Costs Options vested and exercisable - aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value Number of shares covered (in shares) Option Indexed to Issuer's Equity, Shares Balance (in shares) Balance (in shares) Shares, Issued United States UNITED STATES Sales and other taxes payable Taxes Payable, Current Redemption Period One Debt Instrument, Redemption, Period One [Member] Total (in shares) Common Stock, Capital Shares Reserved for Future Issuance Leases [Abstract] Leases [Abstract] Income Taxes Income Tax, Policy [Policy Text Block] Intangible Assets Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block] Operating loss carryforwards with indefinite lives Operating Loss Carryforwards, Indefinite Lived Operating Loss Carryforwards, Indefinite Lived Entity Address, Postal Zip Code Entity Address, Postal Zip Code Weighted-average shares used to compute net loss per share attributable to common stockholders, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted United States Income (Loss) from Continuing Operations before Income Taxes, Domestic Income Taxes Income Tax Disclosure [Text Block] Schedule of stock options activity Share-based Payment Arrangement, Option, Activity [Table Text Block] Less than one year, amortized cost Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost Shares subject to future vesting conditions, value Stock Issued During Period, Shares Subject To Future Vesting Conditions, Value Stock Issued During Period, Shares Subject To Future Vesting Conditions, Value Shares of Class A common stock donated to charity Stock Issued During Period, Value, Donor Advised Fund Stock Issued During Period, Value, Donor Advised Fund Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Supplier relationships Supplier Relationships [Member] Supplier relationship that exists between an entity and its supplier. Options vested and exercisable - number of options outstanding (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number Class of Stock [Line Items] Class of Stock [Line Items] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Unrecorded Unconditional Purchase Obligations Disclosure Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block] Shares of Class A common stock issued under ESPP Stock Issued During Period, Value, Employee Stock Purchase Plan Unrealized (loss) gain on marketable securities Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] General and administrative General and Administrative Expense [Member] Principles of Consolidation Consolidation, Policy [Policy Text Block] Entity Shell Company Entity Shell Company Expected term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Total current liabilities Liabilities, Current Class A common stock committed under ESPP Employee Stock [Member] Value of equity awards withheld for tax liabilities Payment, Tax Withholding, Share-based Payment Arrangement Acquisition Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] Foreign Currency Forward Foreign Exchange Forward [Member] Money market funds Money Market Funds [Member] Loss Contingencies [Table] Loss Contingencies [Table] Cash and cash equivalents Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Current Fiscal Year End Date Current Fiscal Year End Date Statement [Table] Statement [Table] Equity Award Equity Award [Member] Equity Award Recently Issued Accounting Guidance, Not yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Other Deferred Tax Assets, Other Valuation Assumptions Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Statistical Measurement [Axis] Statistical Measurement [Axis] Finance lease liability, noncurrent Finance Lease, Liability, Noncurrent Net Finite-Lived Intangible Assets, Net Goodwill Balance (beginning of period) Balance (end of period) Goodwill Accrued Liabilities and Other Liabilities [Abstract] Accrued Liabilities and Other Liabilities [Abstract] Foreign rate differential Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Schedule of goodwill balance Schedule of Goodwill [Table Text Block] Operating lease, cost Operating Lease, Cost Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Data center equipment Computer Equipment [Member] Schedule of reserved shares of common stock for issuance Common Stock, Capital Shares Reserved for Future Issuance [Table Text Block] Tabular disclosure of reserved shares of common stock, on an as-if converted basis. Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Software Software Not Including Software Development Costs [Member] Represents information pertaining to software other than software development costs. Total Deferred Income Tax Expense (Benefit) Position [Axis] Position [Axis] Shares issuable as part of acquisition, excluding shares held in escrow (in shares) Business Acquisition, Equity Interest Issued or Issuable, Number of Shares, Excluding Shares Held In Escrow Business Acquisition, Equity Interest Issued or Issuable, Number of Shares, Excluding Shares Held In Escrow Cash and Cash Equivalents Cash and Cash Equivalents, Unrestricted Cash and Cash Equivalents, Policy [Policy Text Block] RSUs Subject To Future Vesting RSUs Subject To Future Vesting [Member] RSUs Subject To Future Vesting Hedging Designation [Domain] Hedging Designation [Domain] Tax benefit at federal statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Net Loss Per Share Attributable to Common Stockholders Earnings Per Share, Policy [Policy Text Block] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Net loss attributable to common stockholders Net loss Net Income (Loss) Attributable to Parent Accounts Receivable and Allowance for Doubtful Accounts Receivable [Policy Text Block] Operating right-of-use assets Operating Lease, Right-of-Use Asset Net operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Accrued payroll and related Employee-related Liabilities, Current Income Statement Location [Axis] Income Statement Location [Axis] Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Statistical Measurement [Domain] Statistical Measurement [Domain] Class A common stock reserved for Twilio.org Donor Advised Fund [Member] Donor-advised fund. Segment Information Segment Reporting, Policy [Policy Text Block] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Additional paid-in capital Additional Paid in Capital, Common Stock Schedule of accrued expenses and other current liabilities Schedule of Accrued Expenses and Other Current Liabilities [Table Text Block] Tabular disclosure of the components of accrued expenses and other current liabilities. Debt instrument, liability component Debt Instrument, Liability Component Debt Instrument, Liability Component Other long-term assets Other Assets, Noncurrent Accrued cost of revenue Accrued Cost of Revenue, Current Accrued cost of revenue, current. Dividend rate (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Entity File Number Entity File Number Debt instrument, redemption price, percentage Debt Instrument, Redemption Price, Percentage Common Stock Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] Stock-based compensation APIC, Share-based Payment Arrangement, Increase for Cost Recognition SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] SendGrid Sendgrid Inc [Member] SendGrid, Inc., a communication platform for transactional and marketing mail. Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value [Abstract] Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Total property and equipment Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization Proceeds from sales and maturities of marketable securities Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Schedule of net carrying amount of the liability and equity components of the Notes Convertible Debt [Table Text Block] ASSETS Assets [Abstract] Options vested and exercisable and options vested and expected to vest Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract] Trading price as a percentage of the product of common stock sale price and conversion rate Debt Instrument, Conversion Eligibility Based on Debt Trading Price, Threshold Percentage for Eligibility The trading price of a specified principal amount of the debt instrument as a percent of the product of the last reported sale price of the equity security into which conversion will be made and the conversion rate, below which conversion eligibility is triggered after a specified number of trading days. Derivatives and Hedging Derivative Instruments and Hedging Activities Disclosure [Text Block] Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Goodwill and Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Percentage of revenue Concentration Risk, Percentage Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Proceeds from exercises of stock options and shares of Class A common stock issued under ESPP Proceeds, Issuance of Shares, Share-based Payment Arrangement, Including Option Exercised Stock options issued and outstanding (in shares) Outstanding options as of the beginning of the period (in shares) Outstanding options as of the end of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Class A common stock in escrow and restricted stock awards subject to future vesting Class A Common Stock And Restricted Stock Subject To Future Vesting [Member] Class A Common Stock And Restricted Stock Subject To Future Vesting Settlement of capped call, net of related costs Adjustments to Additional Paid in Capital, Convertible Debt with Conversion Feature Trade names Trade Names [Member] Debt Instrument [Axis] Debt Instrument [Axis] Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Advertising Costs Advertising Cost [Policy Text Block] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Schedule of pro forma information Business Acquisition, Pro Forma Information [Table Text Block] Schedule of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] 2024 Lessee, Operating Lease, Liability, to be Paid, Year Three Thereafter Finite-Lived Intangible Asset, Expected Amortization, after Year Five SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] Schedule of revenue by geographic area Disaggregation of Revenue [Table Text Block] Number of awards outstanding Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Acquisitions Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill [Abstract] Value of equity awards withheld for tax liability Share-based Payment Arrangement, Decrease for Tax Withholding Obligation Shares reserved for issuance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Operating cash flows paid for amounts included in operating lease liabilities Operating Lease, Payments Research and Development Expense Research and Development Expense, Policy [Policy Text Block] Initial cap price (in dollars per share) Option Indexed To Issuer's Equity, Cap Price Cap price stated in the contract for options indexed to the issuer's equity shares. Purchase price, as adjusted Total purchase price Business Combination, Consideration Transferred Value of shares of Class A common stock donated to charity Common Stock, Donor Advised Fund, Value Common Stock, Donor Advised Fund, Value Goodwill Goodwill [Roll Forward] Total financial assets Assets, Fair Value Disclosure Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Other adjustments Other Operating Activities, Cash Flow Statement Accrued expenses and other current liabilities Total accrued expenses and other current liabilities Accrued Liabilities and Other Liabilities, Current Accrued expenses and other current liabilities. Anti-dilutive securities Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] Capitalized internal-use software development costs Software Development [Member] Total liabilities and stockholders’ equity Liabilities and Equity Other Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Accrued other expense Other Accrued Liabilities, Current Deferred revenue and customer deposits Contract with Customer, Liability, Current 2026 Lessee, Operating Lease, Liability, to be Paid, Year Five Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Schedule of intangible assets Schedule of Intangible Assets, Excluding Goodwill [Table Text Block] Tabular disclosure of intangible assets, excluding goodwill, which may be broken down by segment or major class. Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Capped calls Capped Call Option [Member] Capped call options covering shares of the entity's Class A Common Stock, intended to reduce or offset potential dilution resulting from the conversion of convertible senior notes. Concentration Risk [Line Items] Concentration Risk [Line Items] Net Loss Per Share Attributable to Common Stockholders Earnings Per Share [Text Block] Impairment of operating right-of-use assets Operating Lease, Impairment Loss Operating expenses: Operating Expenses [Abstract] Option Indexed to Issuer's Equity, Type [Domain] Option Indexed to Issuer's Equity, Type [Domain] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Minimum Minimum [Member] Carrying amount of equity component Proceeds allocated to the conversion options (debt discount) Debt Instrument, Convertible, Carrying Amount of Equity Component Transaction costs for settlement of capped calls Payments For Convertible Debt, Transaction Costs Payments For Convertible Debt, Transaction Costs Costs Related to Public Offerings Deferred Public Offering Costs [Policy Text Block] Deferred Public Offering Costs [Policy Text Block] Segment.io Inc. Segment.io Inc. [Member] Segment.io Inc. Gross profit Gross Profit 2023 Lessee, Operating Lease, Liability, to be Paid, Year Two Effect of exchange rate changes on cash, cash equivalents and restricted cash Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Revenue recognized, period for recognition Contract With Customer, Revenue Recognized, Period For Recognition Contract With Customer, Revenue Recognized, Period For Recognition Unamortized issuance costs Debt Issuance Costs, Net Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets [Axis] Other comprehensive (loss) income: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Preferred stock, authorized (in shares) Preferred Stock, Shares Authorized Redemption Period Six Debt Instrument, Redemption, Period Six [Member] Debt Instrument, Redemption, Period Six Capitalized software development costs Payments to Develop Software Issuance of shares of Class A common stock in connection with a follow-on public offering, net of underwriters' discounts and issuance costs Stock Issued During Period, Value, New Issues Revenue Recognition Revenue [Policy Text Block] Restricted cash in other long-term assets Restricted Cash and Cash Equivalents, Noncurrent Acquisitions, net of cash acquired and other related payments Payments to Acquire Businesses, Net of Cash Acquired Schedule of Components of Income Tax Expense (Benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Less than one year, aggregate fair value Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Intangibles Deferred Tax Assets, Goodwill and Intangible Assets Discount from market price, offering date (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date Stock-Based Compensation Share-based Payment Arrangement [Text Block] Senior Notes Senior Notes [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Leases Lessee, Leases [Policy Text Block] Less: accumulated depreciation and amortization Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization Capitalized Contract Cost [Domain] Capitalized Contract Cost [Domain] Issuance of common stock in connection with a follow-on public offering, net of underwriter discounts and issuance costs (in shares) Stock Issued During Period, Shares, New Issues Convertible senior notes due 2023 Convertible Senior Notes 0.25 Percent Due 2023 [Member] Represents convertible senior notes that bear an interest rate of 0.25 percent and will mature in 2023. Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Goodwill additions related to acquisitions Goodwill, Acquired During Period Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Commitments and contingencies (Note 13) Commitments and Contingencies Subsequent Event [Table] Subsequent Event [Table] Accumulated other comprehensive (loss) income Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Emerging Growth Company Entity Emerging Growth Company Net proceeds from the debt offering Proceeds from Debt, Net of Issuance Costs Convertible debt Deferred Tax Liabilities, Convertible Debt Amount of deferred tax liability attributable to taxable temporary differences from convertible debt. Payment of debt issuance costs Payments of Debt Issuance Costs Receivables [Abstract] Receivables [Abstract] Auditor Name Auditor Name Cover [Abstract] Cover [Abstract] Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Fair value of unvested employee shares Business Combination, Fair Value Of Unvested Employee Shares Business Combination, Fair Value Of Unvested Employee Shares Less: imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount 2024 Unrecorded Unconditional Purchase Obligation, to be Paid, Year Three Financial Instrument [Axis] Financial Instrument [Axis] Shares issuable as part of acquisition (in shares) Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Office equipment Office Equipment [Member] Current: Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Convertible senior notes, 0.25%, due 2023 - over-allotment Convertible Senior Notes0.25 Percent Due2023 Over Allotment [Member] Represents convertible senior notes that bear an interest rate of 0.25 percent and will mature in 2023, issued pursuant to the exercise of the over-allotment options of the initial purchasers. Non-Usage Based Contracts Non-Usage Based Contracts [Member] Non-Usage Based Contracts Interest earned on marketable securities Investment Income, Interest Common Stock Common Stock [Member] International Income (Loss) from Continuing Operations before Income Taxes, Foreign Loss from operations Operating Income (Loss) Operating lease liability, current Less: current obligations Operating Lease, Liability, Current Summary of Significant Accounting Policies Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] 2023 Finite-Lived Intangible Asset, Expected Amortization, Year Two Hedging Designation [Axis] Hedging Designation [Axis] Stock-based compensation Share-based Payment Arrangement, Noncash Expense Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Depreciation and amortization Depreciation Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Accrued expenses and other current liabilities Increase (Decrease) in Accrued Liabilities Unrecognized tax benefits, ongoing Unrecognized Tax Benefits, Increase Resulting From Ongoing Benefit Unrecognized Tax Benefits, Increase Resulting From Ongoing Benefit Class A common stock in escrow Class A Common Stock Held In Escrow [Member] Class A Common Stock Held In Escrow Derivative, notional amount Derivative, Notional Amount Purchases of long-lived and intangible assets Payments to Acquire Property, Plant, and Equipment Total liabilities Liabilities Payment for debt settlement Payment for Debt Extinguishment or Debt Prepayment Cost 2022 Finite-Lived Intangible Asset, Expected Amortization, Year One Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Options vested and exercisable - weighted-average exercise price (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price Aggregate intrinsic value Outstanding performance based options, aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Operating loss carryforwards Operating Loss Carryforwards Common stock, issued (in shares) Common Stock, Shares, Issued Preferred stock, issued (in shares) Preferred Stock, Shares Issued Preferred Stock Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract] Entity Address, City or Town Entity Address, City or Town Loss on extinguishment of debt Gain (loss) on extinguishment of debt Gain (Loss) on Extinguishment of Debt Taxes Payable Taxes Payable NON-CASH INVESTING AND FINANCING ACTIVITIES: Noncash Investing and Financing Items [Abstract] Schedule of Unrecognized Tax Benefits Roll Forward Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Net change in market value of effective foreign currency forward exchange contracts Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent Risk-free interest rate, low end of range (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Deferred: Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Tax benefit related to release of valuation allowance Tax benefit related to release of valuation allowance Unrecognized Tax Benefits, Increase Resulting from Acquisition Stock plan offering period Share-based Compensation Arrangement By Share-based Payment Award, Stock Plan Offering Period Share-based Compensation Arrangement By Share-based Payment Award, Stock Plan Offering Period Effective percentage Debt Instrument, Interest Rate, Effective Percentage Value of equity awards assumed in acquisition Fair value of the pre-combination service through equity awards Equity Awards Assumed During Period Value Equity Awards Assumed During Period Value Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Total purchase price Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Amortization of deferred commissions Capitalized Contract Cost, Amortization Accumulated deficit Retained Earnings (Accumulated Deficit) Expiration term Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Debt instrument, minimum redemption price as a percentage of principal outstanding Debt Instrument, Minimum Redemption Price As A Percentage Of Principal Outstanding Debt Instrument, Minimum Redemption Price As A Percentage Of Principal Outstanding Shares of Class A common stock issued under ESPP (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Entity Filer Category Entity Filer Category Usage Based Contracts Usage Based Contracts [Member] Usage Based Contracts Derivative Instruments, Gain (Loss) Derivative Instruments, Gain (Loss) [Table Text Block] U.S. Treasury securities US Treasury Securities [Member] Order backlog Order or Production Backlog [Member] Concentration Risk [Table] Concentration Risk [Table] Zipwhip Zipwhip [Member] Zipwhip Non-cash reduction to the right-of-use asset Leases, Right-Of-Use Asset, Amortization Leases, Right-Of-Use Asset, Amortization Non-amortizable intangible assets: Indefinite-lived Intangible Assets (Excluding Goodwill) Vesting of restricted stock units (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Derivative, term of contract Derivative, Term of Contract Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Summary of Tax Credit Carryforwards Summary of Tax Credit Carryforwards [Table Text Block] Amendment Flag Amendment Flag Equity Components [Axis] Equity Components [Axis] Sales credit reserve SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Debt conversion, converted instrument, amount including cash Debt Conversion, Converted Instrument, Amount Including Cash Debt Conversion, Converted Instrument, Amount Including Cash Sales and marketing Selling and Marketing Expense [Member] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Federal Deferred Federal Income Tax Expense (Benefit) Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Performance-based stock options Performance Based Employee Stock Options [Member] Performance-based stock options awarded to employees. Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Valuation allowance increase (decrease) Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Product and Service [Axis] Product and Service [Axis] Assumed in acquisition (in shares) Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Shares Assumed In Acquisition Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Shares Assumed In Acquisition Investment in equity securities, carrying value Equity Securities without Readily Determinable Fair Value, Amount Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Entity Public Float Entity Public Float Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Conversion ratio Convertible Securities, Conversion Ratio Ratio for the conversion option of the convertible security. Redemption Period Three Debt Instrument, Redemption, Period Three [Member] Sales and marketing Selling and Marketing Expense Number of leased properties Lessee, Operating Lease, Number Of Contracts Lessee, Operating Lease, Number Of Contracts Statement [Line Items] Statement [Line Items] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] Charitable contributions Deferred Tax Assets, Charitable Contribution Carryforwards Deferred revenue and customer deposits Increase (Decrease) in Contract with Customer, Liability Accrued and prepaid expenses Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals Weighted- average exercise price (Per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Debt issuance cost Deferred Tax Assets, Debt Issuance Costs Amount before allocation of valuation allowances of deferred tax asset attributable to debt issuance costs. Domestic Tax Authority Domestic Tax Authority [Member] Internal-Use Software Development Costs Internal Use Software, Policy [Policy Text Block] Marketable securities, aggregate fair value Total aggregate fair value Debt Securities, Available-for-sale Redemption Period Five Debt Instrument, Redemption, Period Five [Member] Debt Disclosure [Abstract] Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table] Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table] Purchase price, percentage of fair market value (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent Net carrying amount Debt Instrument, Convertible, Carrying Amount of Equity Component, Net of Issuance Costs The carrying amount of the equity component of convertible debt, net of associated issuance costs. Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Valuation allowance Deferred Tax Assets, Valuation Allowance Initial strike price (in dollars per share) Option Indexed to Issuer's Equity, Strike Price Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Threshold trading days Debt Instrument, Convertible, Threshold Trading Days Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Document Annual Report Document Annual Report Schedule of stock based compensation expense Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Total assets Assets Plan Name [Domain] Plan Name [Domain] Geographical [Domain] Geographical [Domain] Stock Based Compensation Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract] Shares subject to future vesting conditions (in shares) Stock Issued During Period, Shares Subject To Future Vesting Conditions Stock Issued During Period, Shares Subject To Future Vesting Conditions Research and development Research and Development Expense Derivative Contract [Domain] Derivative Contract [Domain] Revenue, remaining performance obligation, expected timing of satisfaction, period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Net cash (used in) provided by operating activities Net Cash Provided by (Used in) Operating Activities Tax credit carryforward, amount Tax Credit Carryforward, Amount Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Furniture and fixtures Furniture and Fixtures [Member] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Deferred Revenue and Customer Deposits and Deferred Sales Commissions Deferred Charges, Policy [Policy Text Block] Subsequent Events Subsequent Event [Line Items] Capitalized Contract Cost [Axis] Capitalized Contract Cost [Axis] Cash paid for interest Cash Paid On Finance Leases Cash Paid On Finance Leases Weighted-average shares used to compute net loss per share attributable to common stockholders, basic (in shares) Weighted-average shares used to compute net loss per share attributable to common stockholders, basic (in shares) Weighted Average Number of Shares Outstanding, Basic Net loss per share attributable to common stockholders, diluted (in dollars per share) Earnings Per Share, Diluted 2023 Unrecorded Unconditional Purchase Obligation, to be Paid, Year Two Cash paid for income taxes, net Income Taxes Paid, Net Capped call Deferred Tax Assets, Capped Call Amount before allocation of valuation allowances of deferred tax asset attributable to capped call transactions. International Non-US [Member] Comprehensive loss attributable to common stockholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Intangible assets, net Total Intangible Assets, Net (Excluding Goodwill) Deferred revenue Contract with Customer, Liability Cost of revenue Cost Of Revenue [Member] Cost Of Revenue Equity component from partial settlement and redemption of convertible senior notes due 2023 (in shares) Stock Issued During Period, Shares, Conversion of Convertible Securities Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Property and equipment, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Schedule of Effective Income Tax Rate Reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Assets held under capital leases Assets Held under Capital Leases [Member] Accounts payable Accounts Payable, Current Impairment of long-lived assets Impairment, Long-Lived Asset, Held-for-Use Depreciation and amortization Depreciation, Depletion and Amortization Schedule of financial assets measured at fair value on a recurring basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Accumulated Other Comprehensive Income AOCI Attributable to Parent [Member] Common stock, outstanding (in shares) Common Stock, Shares, Outstanding Financial Instruments [Domain] Financial Instruments [Domain] Buy Long [Member] Corporate debt securities and commercial paper Corporate Debt Securities Commercial Paper [Member] Represents the information pertaining to Corporate debt securities and Commercial Paper. Common Stock Class B Common Class B [Member] Entity Central Index Key Entity Central Index Key Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Acquired Indefinite-lived Intangible Assets [Line Items] Acquired Indefinite-lived Intangible Assets [Line Items] Incremental commission costs of obtaining new contracts Incremental Commission Costs Of Obtaining New Contracts [Member] Capitalized incremental commission costs of obtaining new contracts. Gross decrease for tax positions of prior years Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Customer relationships Customer Relationships [Member] Stock options issued and outstanding Employee And Nonemployee Stock Option Including Performance Based Options [Member] Employee and nonemployee stock options, including performance-based stock options awarded to employees. Loss Contingencies [Line Items] Loss Contingencies [Line Items] Property and Equipment Property, Plant and Equipment Disclosure [Text Block] Other long-term liabilities Other Liabilities, Noncurrent Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Debt Instrument [Line Items] Debt Instrument [Line Items] Trading Symbol Trading Symbol Revenue Business Acquisition, Pro Forma Revenue Other Deferred Tax Liabilities, Other Gross Unrealized Losses Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss Stock-based compensation expense Share-based Payment Arrangement, Expense Cost of Revenue Cost of Goods and Service [Policy Text Block] Common stock, value, subscriptions Common Stock, Value, Subscriptions Long-term Purchase Commitment [Table] Long-term Purchase Commitment [Table] Entities [Table] Entities [Table] Net loss Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Schedule of Income before Income Tax, Domestic and Foreign Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Common Stock Class A Common Class A [Member] CASH, CASH EQUIVALENTS AND RESTRICTED CASH—Beginning of period CASH, CASH EQUIVALENTS AND RESTRICTED CASH —End of period Total cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Shares sold in offering (in shares) Sale of Stock, Number of Shares Issued in Transaction Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Risk-free interest rate, high end of range (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Current assets: Assets, Current [Abstract] Gross Finite-Lived Intangible Assets, Gross Amortizable intangible assets: Finite-Lived Intangible Assets, Net [Abstract] Schedule of intangible assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Impairment of Long-Lived Assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Option Indexed to Issuer's Equity [Axis] Option Indexed to Issuer's Equity [Axis] Cash and cash equivalents: Cash and Cash Equivalents, Fair Value Disclosure Exercises of vested stock options (in shares) Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period 2016 Stock Option and Incentive Plan Stock Option And Incentive Plan2016 [Member] 2016 Stock Option and Incentive Plan. Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Audit Information [Abstract] Audit Information [Abstract] Schedule of common stock equivalents excluded from the computation of the diluted net loss per share attributable to common stockholders Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] 2026 Finite-Lived Intangible Asset, Expected Amortization, Year Five Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Operating right-of-use asset Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Operating Right-Of-Use Assets Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Operating Right-Of-Use Assets Auditor Firm ID Auditor Firm ID Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Revenue by geographic area: Disaggregation of Revenue [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Fair value of common stock (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Fair Value of Common Stock Fair value of common stock per share during the period. Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Class of Stock [Domain] Class of Stock [Domain] Cash consideration Payments to Acquire Businesses, Gross Syniverse Syniverse [Member] Syniverse Position [Domain] Position [Domain] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Advertising expense Advertising Expense Other long-term assets Increase (Decrease) in Other Noncurrent Assets Long-term Debt, Unclassified [Abstract] Long-term Debt, Unclassified [Abstract] Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Debt settlement, amount Extinguishment of Debt, Amount Losses recognized in income due to instruments maturing Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Balance, beginning of period Balance, end of period SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount Cost of revenue Cost of Sales [Member] Class A common stock reserved for the Convertible Notes (in shares) Common Stock, Capital Shares Reserved For Convertible Debt Number of common shares reserved for issuance upon conversion of convertible debt. Foreign Current Foreign Tax Expense (Benefit) Convertible senior notes Convertible Senior Notes [Member] Convertible Senior Notes Organization and Description of Business Nature of Operations [Text Block] Finance lease asset Finance Lease, Right-of-Use Asset, before Accumulated Amortization Developed technology Developed Technology Rights [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Unamortized discount Debt Instrument, Unamortized Discount Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Schedule of valuation assumptions, ESOP Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] Notes Payable Long-term Debt [Text Block] Adjustments to reconcile net loss to net cash (used in) provided by operating activities: Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]