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Billed consideration Billed Revenues [Member] Entity Shell Company Entity Shell Company Expected volatility, minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Marketable Securities [Table] Marketable Securities [Table] Related Party Transactions Related Party Transactions Disclosure [Text Block] Total stockholders’ equity (deficit) Beginning balance Ending balance Stockholders' Equity Attributable to Parent Rent expense Operating Leases, Rent Expense, Net Veeva Systems Inc. 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Total assets Assets Initial public offering IPO [Member] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Marketable securities Estimated Fair Value Total Debt Securities, Available-for-sale Weighted-Average Remaining Contractual Life (Years), Vested Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Plan Name Plan Name [Domain] Remaining performance obligation Revenue, Remaining Performance Obligation, Amount Document Fiscal Period Focus Document Fiscal Period Focus Document Type Document Type Schedule of Financial Instruments Measured at Fair Value on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Income Statement [Abstract] Operating Leases Lessee, Operating Leases [Text Block] Entity Information [Line Items] Entity Information [Line Items] Restricted cash from international employee stock sales Restricted Cash, Current Accrued expenses and other liabilities Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Use of Estimates Use of Estimates, Policy [Policy Text Block] Income tax expense Income Tax Expense (Benefit) Amortization of operating lease right-of-use assets Operating Lease Right Of Use Asset Amortization Amortization of right-of-use assets. Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Axis] Total current assets Assets, Current Schedule of Future Minimum Lease Payments included in Measurement of Operating Lease Liabilities Lessee, Operating Lease, Liability, Maturity [Table Text Block] Deferred revenue, noncurrent Contract with Customer, Liability, Noncurrent Net increase in cash, cash equivalents, and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Number of common stock subject to repurchase (in shares) Weighted Average Number of Shares, Common Stock Subject to Repurchase or Cancellation Dropbox Dropbox [Member] Dropbox member Total current liabilities Liabilities, Current Equity investment Equity Method Investments General and administrative General and Administrative Expense Property, Plant and Equipment, Type Property, Plant and Equipment, Type [Domain] Debt instrument face amount Debt Instrument, Face Amount Related Party Related Party [Axis] RSUs Unvested RSUs Restricted Stock Units (RSUs) [Member] Total liabilities, convertible preferred stock, and stockholders’ equity (deficit) Liabilities and Equity Shares subject to repurchase from early exercised stock options and restricted stock Shares Subject to Repurchase from Early Exercised Stock Options and Restricted Stock [Member] Shares Subject to Repurchase from Early Exercised Stock Options and Restricted Stock 2021 Operating Leases, Future Minimum Payments, Due in Two Years Accounts receivable, net of allowances of $5,193 and $2,071 as of October 31, 2019 and January 31, 2019, respectively Accounts Receivable, Net, Current Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Class of Stock [Line Items] Class of Stock [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Equity Components Equity Components [Axis] Granted (in units) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Proceeds from issuance of convertible debt, net Proceeds from Convertible Debt Cancelled/forfeited (in dollars per unit) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Award Type Award Type [Axis] Summary of Stock-based Compensation Expense by Line Item Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block] Counterparty Name Counterparty Name [Domain] Private Placement Private Placement [Member] Diluted (in shares) Weighted-average shares used in computing net income per share attributable to common stockholders, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Agency bonds Municipal Bonds [Member] Convertible promissory notes – derivative liabilities Derivative Liability Maturities of marketable securities Proceeds from Sale and Maturity of Marketable Securities Common stock, shares issued (in shares) Common Stock, Shares, Issued Operating lease right-of-use assets Operating lease, total ROU assets Operating Lease, Right-of-Use Asset Preferred stock, par value (in dollars per share) Undesignated referred stock par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Computer and Office Equipment Computer And Office Equipment [Member] Computer and office equipment. Treasury bills US Treasury Bill Securities [Member] Beginning balance (in dollars per share) Ending balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Consecutive offering period Share-Based Compensation Arrangement By Share-based Payment Award, Consecutive Offering Period Share-Based Compensation Arrangement By Share-based Payment Award, Consecutive Offering Period Preferred stock Preferred Stock, Value, Issued Net income (loss) Net income (loss) Net Income (Loss) Attributable to Parent Cancelled/forfeited/expired (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Entity Small Business Entity Small Business Leases Lessee, Leases [Policy Text Block] Convertible preferred stock, shares issued (in shares) Temporary Equity, Shares Issued Operating lease liabilities, current Accrued expenses and other current liabilities Operating Lease, Liability, Current Issuance of common stock reserved for charitable donation (in shares) Stock Issued During Period, Shares, Charitable Donation Stock Issued During Period, Shares, Charitable Donation Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Debt instrument term Debt Instrument, Term Beginning balance (in shares) Ending balance (in shares) Shares, Outstanding Accrued expenses Accrued Liabilities, Current Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Counterparty Name Counterparty Name [Axis] Vesting period of awards Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Financial Instrument [Axis] Financial Instrument [Axis] Depreciation and amortization Depreciation, Depletion and Amortization Prepaid expenses and other current assets Other Assets, Current Denominator: Earnings Per Share, Diluted [Abstract] Employee Stock Purchase Plan Employee Stock [Member] Other Other Assets, Miscellaneous, Noncurrent Reallocation of net income attributable to common stockholders Reallocation Of Net Income Loss Available To Common Stockholders Diluted Reallocation of net income loss available to common stockholders diluted. Deferred revenue Increase (Decrease) in Contract with Customer, Liability Marketable Securities [Line Items] Marketable Securities [Line Items] U.S. government agency securities US Government Agencies Debt Securities [Member] Summary of Potential Shares of Common Stock Excluded from Computation of Diluted Net Income Per Share Attributable to Common Stockholders Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Capitalized deferred offering costs within other assets, non-current Deferred Costs, Noncurrent Current liabilities: Liabilities, Current [Abstract] Gross Unrealized Gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Issuance of common stock upon exercise of stock options (in shares) Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Liabilities, convertible preferred stock, and stockholders’ equity (deficit) Liabilities and Equity [Abstract] Percentage of shares reserved increase Percentage Of Share Based Compensation Arrangements By Share Based Payment Award Options Increase In Shares Reserved For Issuance Percentage of share based compensation arrangements by share based payment award options increase in shares reserved for issuance. Percentage of revenue Percentage Of Revenue Percentage of revenue. Beginning balance (in dollars per unit) Ending balance (in dollars per unit) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Revenue Revenue from Contract with Customer, Excluding Assessed Tax Cash equivalents, Amortized Cost Cash Equivalents, at Carrying Value Money market funds Money Market Funds [Member] Beginning Balance Ending Balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Income Taxes Income Tax Disclosure [Text Block] Financial Assets: Assets, Fair Value Disclosure [Abstract] 2023 Operating Leases, Future Minimum Payments, Due in Four Years Lease contractual period Lessee, Operating Lease, Term of Contract 2020 Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year Statement of Cash Flows [Abstract] Weighted-average shares used in computing net income (loss) per share attributable to common stockholders: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Gross Unrealized Losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Undistributed earnings attributable to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Class of Stock Class of Stock [Axis] Weighted-average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Related Party Related Party [Domain] Deferred revenue, current Contract with Customer, Liability, Current Net income (loss) per share attributable to common stockholders: Earnings Per Share [Abstract] Shares of common stock reserved for grants of awards (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Leases [Abstract] Schedule of Accrued Expenses and Other Current Liabilities Accrued Expenses And Other Current Liabilities [Table Text Block] Accrued expenses and other current liabilities. Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Minimum Minimum [Member] Entities [Table] Entities [Table] Current assets: Assets, Current [Abstract] Summary Disaggregation of Revenue by Region Disaggregation of Revenue [Table Text Block] Operating lease, expense Operating Lease, Cost Conversion of convertible preferred stock to common stock upon initial public offering Stock Issued During Period, Value, Conversion of Convertible Securities Accrued compensation and benefits Accrued Employee Benefits, Current Issuance of common stock upon exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Fair Value, Measurement Frequency Fair Value, Measurement Frequency [Domain] Statement of Comprehensive Income [Abstract] Revenue from related party Revenue from Related Parties Other liabilities, noncurrent Other liabilities, non-current Other Liabilities, Noncurrent Proceeds from exercise of stock options, net of repurchases Proceeds from Stock Options Exercised Gross profit Gross Profit Net Income (Loss) Per Share Attributable to Common Stockholders Earnings Per Share [Text Block] Asia Pacific (“APAC”) Asia Pacific [Member] Class of Stock Class of Stock [Domain] Unrecognized stock-based compensation expenses Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Other Other Liabilities, Current Aggregate proceeds from shares issued Sale of Stock, Consideration Received Per Transaction Issuance of common stock reserved for charitable donations Stock Issued During Period, Value, Charitable Donation Stock Issued During Period, Value, Charitable Donation Maximum Maximum [Member]