Fair Value Disclosures [Abstract] Fair Value Measurements, Recurring Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency Measurement Frequency [Axis] Fair Value, Measurement Frequency Fair Value, Measurement Frequency [Domain] Fair value, measurements, recurring Fair Value, Measurements, Recurring [Member] Financial Instruments Financial Instrument [Axis] Financial Instruments Financial Instruments [Domain] Money market funds Money Market Funds [Member] Certificates of deposit Certificates of Deposit [Member] Commercial paper Commercial Paper [Member] U.S. government and agency securities US Treasury and Government [Member] Non-U.S. government securities Debt Security, Government, Non-US [Member] Corporate debt securities Corporate Debt Securities [Member] Foreign currency forward contracts Foreign Exchange Forward [Member] Fair Value, Hierarchy Fair Value Hierarchy and NAV [Axis] Fair Value, Measurements, Fair Value Hierarchy Fair Value Hierarchy and NAV [Domain] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Fair Value, Assets and Liabilities Measured on Recurring Basis Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Short-term investments Short Term Investments, Fair Value Disclosure Short Term Investments, Fair Value Disclosure Long-term investments Long Term Investments, Fair Value Disclosure Long Term Investments, Fair Value Disclosure Foreign currency forward contracts assets Derivative Asset Prepaid expenses and other current assets Prepaid Expenses and Other Current Assets, Fair Value Disclosure Prepaid Expenses and Other Current Assets, Fair Value Disclosure Total assets measured at fair value Assets, Fair Value Disclosure Foreign currency forward contracts liabilities Derivative Liability Accrued and other liabilities Accrued Liabilities, Fair Value Disclosure Total liabilities measured at fair value Financial and Nonfinancial Liabilities, Fair Value Disclosure Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition Schedule of Business Acquisitions, by Acquisition [Table] Equity Interest Type Equity Interest Type [Axis] Equity Interest Issued or Issuable, Type Equity Interest Issued or Issuable, Type [Domain] Common stock Common Stock [Member] Replacement equity awards Replacement Equity Awards [Member] Replacement Equity Awards [Member] Business Acquisition Business Acquisition [Axis] Business Acquisition, Acquiree Business Acquisition, Acquiree [Domain] Twistlock Ltd. Twistlock Ltd. [Member] Twistlock Ltd. [Member] PureSec Ltd. PureSec Ltd. [Member] PureSec Ltd. [Member] Demisto, Inc. Demisto, Inc. [Member] Demisto, Inc. [Member] RedLock, Inc. RedLock, Inc. [Member] RedLock, Inc. [Member] Evident.io, Inc. Evident.io, Inc. [Member] Evident.io, Inc. Cyber Secdo Ltd. Cyber Secdo Ltd. [Member] Cyber Secdo Ltd. [Member] LightCyber Ltd. LightCyber Ltd. [Member] LightCyber Ltd. [Member] Business Acquisition Business Acquisition [Line Items] Common stock issued (in shares) Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Cash Payments to Acquire Businesses, Gross Fair value of unvested equity awards attributable to pre-combination services Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Accrued consideration Business Combination, Consideration Transferred, Accrued Business Combination, Consideration Transferred, Accrued Total consideration transferred Business Combination, Consideration Transferred Revenue from Contract with Customer [Abstract] Schedule of deferred contract costs Capitalized Contract Cost [Table Text Block] Statement of Cash Flows [Abstract] Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Net loss Net Income (Loss) Attributable to Parent Adjustments to reconcile net loss to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Share-based compensation for equity-based awards Share-based Compensation Depreciation and amortization Depreciation, Depletion and Amortization Cease-use loss and asset impairment related to facility exit Business Exit Costs Amortization of deferred contract costs Capitalized Contract Cost, Amortization Amortization of debt discount and debt issuance costs Amortization of Debt Issuance Costs and Discounts Amortization of investment premiums, net of accretion of purchase discounts Accretion (Amortization) of Discounts and Premiums, Investments Loss on conversions of convertible senior notes Gain (Loss) on Extinguishment of Debt Repayments of convertible senior notes attributable to debt discount Repayments Of Convertible Debt, Debt Discount Repayments Of Convertible Debt, Debt Discount Changes in operating assets and liabilities, net of effects of acquisitions: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable, net Increase (Decrease) in Accounts Receivable Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Accounts payable Increase (Decrease) in Accounts Payable Accrued compensation Increase (Decrease) in Employee Related Liabilities Accrued and other liabilities Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Deferred revenue Increase (Decrease) in Contract with Customer, Liability Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Purchases of investments Payments to Acquire Investments Proceeds from sales of investments Proceeds from the sale of investments Proceeds from the sale of investments Proceeds from maturities of investments Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Business acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Purchases of property, equipment, and other assets Payments to Acquire Productive Assets Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Repayments of convertible senior notes attributable to principal and equity component Repayments Of Convertible Debt, Debt Principal and Equity Component Repayments Of Convertible Debt, Debt Principal and Equity Component Payments for debt issuance costs Payments of Debt Issuance Costs Proceeds from borrowings on convertible senior notes, net Proceeds from Convertible Debt Proceeds from issuance of warrants Proceeds from Issuance of Warrants Purchase of note hedges Purchase of Note Hedges Purchase of Note Hedges Repurchases of common stock Payments for Repurchase of Common Stock Proceeds from sales of shares through employee equity incentive plans Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options Payments for taxes related to net share settlement of equity awards Payments Related to Tax Withholding for Share-based Compensation Payment of deferred consideration related to prior year business acquisition Payments of Merger Related Costs, Financing Activities Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities 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 Cash, cash equivalents, and restricted cash—beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents, and restricted cash—end of period Non-cash investing and financing activities Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Equity consideration for business acquisitions Property and equipment acquired through lease incentives Noncash or Part Noncash Acquisition, Fixed Assets Acquired Supplemental disclosures of cash flow information Supplemental Cash Flow Information [Abstract] Cash paid for income taxes Income Taxes Paid, Net Cash paid for contractual interest Interest Paid, Contractual Interest Interest Paid, Contractual Interest Property, Plant and Equipment [Abstract] Schedule of Property, Plant and Equipment Property, Plant and Equipment [Table] Property, Plant and Equipment, Type Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type Property, Plant and Equipment, Type [Domain] Computers, equipment, and software Computer Equipment, Equipment, and Software and Software Development Costs [Member] Computer Equipment, Equipment, and Software and Software Development Costs[Member] Leasehold improvements Leasehold Improvements [Member] Demonstration units Demonstration units [Member] Demonstration units [Member] Furniture and fixtures Furniture and Fixtures [Member] Property and Equipment Property, Plant and Equipment [Line Items] Property and equipment, gross Property, Plant and Equipment, Gross Less: accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Total property and equipment, net Property, Plant and Equipment, Net Deferred Contract Costs Capitalized Contract Cost [Table] Balance Sheet Location Balance Sheet Location [Axis] Balance Sheet Location Balance Sheet Location [Domain] Short-term Prepaid Expenses and Other Current Assets [Member] Long-term Other Assets [Member] Deferred Contract Costs Capitalized Contract Cost [Line Items] Deferred contract costs Capitalized Contract Cost, Net Statement of Stockholders' Equity [Abstract] Statement Statement [Table] Equity Components Equity Components [Axis] Equity Component Equity Component [Domain] Common stock and additional paid in capital Common Stock Including Additional Paid in Capital [Member] Accumulated other comprehensive income (loss) AOCI Attributable to Parent [Member] Accumulated deficit Retained Earnings [Member] Statement Statement [Line Items] Increase (decrease) in stockholders' equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, beginning balance (in shares) Common Stock, Shares, Outstanding Beginning balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Cumulative-effect adjustment from adoption of new accounting pronouncement Cumulative Effect of New Accounting Principle in Period of Adoption Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Issuance of common stock in connection with employee equity incentive plans (in shares) Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Issuance of common stock in connection with employee equity incentive plans Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Repurchase and retirement of common stock (in shares) Stock Repurchased and Retired During Period, Shares Repurchase and retirement of common stock Stock Repurchased and Retired During Period, Value Taxes paid related to net share settlement of equity awards Adjustments Related to Tax Withholding for Share-based Compensation Share-based compensation for equity-based awards Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Temporary equity reclassification Adjustments To Additional Paid In Capital Reclassification To Temporary Equity From Convertible Debt Adjustments To Additional Paid In Capital Reclassification To Temporary Equity From Convertible Debt Equity component of convertible senior notes, net Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt Issuance of warrants Adjustments to Additional Paid in Capital, Warrant Issued Purchase of note hedges Adjustments to Additional Paid in Capital, Convertible Debt, Purchase of Note Hedge Adjustments to Additional Paid in Capital, Convertible Debt, Purchase of Note Hedge Settlement of convertible notes (in shares) Stock Issued During Period, Shares, Conversion of Convertible Securities Settlement of convertible notes Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Subsequent Adjustments Common stock received from exercise of note hedges (in shares) Note Hedges, Exercises In Period, Shares Received Note Hedges, Exercises In Period, Shares Received Issuance of common and restricted common stock in connection with acquisitions (in shares) Stock Issued During Period, Shares, Acquisitions Issuance of common and restricted common stock in connection with acquisitions Stock Issued During Period, Value, Acquisitions Common stock, ending balance (in shares) Ending balance Organization, Consolidation and Presentation of Financial Statements [Abstract] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Concentrations Concentration Risk, Credit Risk, Policy [Policy Text Block] Comprehensive Loss Comprehensive Income, Policy [Policy Text Block] Foreign Currency Transactions Foreign Currency Transactions and Translations Policy [Policy Text Block] Fair Value Fair Value of Financial Instruments, Policy [Policy Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Investments Marketable Securities, Policy [Policy Text Block] Accounts Receivable Trade and Other Accounts Receivable, Policy [Policy Text Block] Derivatives Derivatives, Policy [Policy Text Block] Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Business Combinations Business Combinations Policy [Policy Text Block] Intangible Assets Depreciation, Depletion, and Amortization [Policy Text Block] Impairment of Goodwill, Intangible Assets, and Other Long-Lived Assets Impairment or Disposal of Long-Lived Assets, Including Intangible Assets, Policy [Policy Text Block] Manufacturing Partner and Supplier Liabilities Manufacturing Partner and Supplier Liabilities, Policy [Policy Text Block] Manufacturing Partner and Supplier Liabilities, Policy [Policy Text Block] Convertible Senior Notes Debt, Policy [Policy Text Block] Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Deferred Contract Costs Deferred Charges, Policy [Policy Text Block] Software Development Costs Research, Development, and Computer Software, Policy [Policy Text Block] Share-Based Compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Leases Lessee, Leases [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Loss Contingencies Commitments and Contingencies, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Investments, Debt and Equity Securities [Abstract] Cash equivalents and investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Earnings Per Share [Abstract] Net Loss Per Share Earnings Per Share [Text Block] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill Goodwill [Roll Forward] Balance as of July 31, 2018 Goodwill Goodwill acquired Goodwill, Acquired During Period Balance as of July 31, 2019 Debt Disclosure [Abstract] Schedule of Note Hedge Transactions Schedule of Note Hedge Transactions [Table] Schedule of Note Hedge Transactions [Table] Note Hedge Note Hedge [Axis] Note Hedge [Axis] Note Hedge Note Hedge [Domain] [Domain] for Note Hedge [Axis] 2019 Note Hedges 2019 Note Hedges [Member] 2019 Note Hedges [Member] 2023 Note Hedges 2023 Note Hedges [Member] 2023 Note Hedges [Member] Schedule of Note Hedge Transactions Schedule of Note Hedge Transactions [Line Items] [Line Items] for Schedule of Note Hedge Transactions [Table] Shares of common stock covered by note hedges (in shares) Shares Of Common Stock Covered By Note Hedges Shares Of Common Stock Covered By Note Hedges Aggregate amount paid to purchase note hedges - additional paid-in capital Common stock received from exercise of note hedges (in shares) Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Products and Services Product and Service [Axis] Products and Services Product and Service [Domain] Product Product [Member] Subscription and support Service [Member] Income Statement Location Income Statement Location [Axis] Income Statement Location Income Statement Location [Domain] Cost of revenue Cost of Sales [Member] Research and development Research and Development Expense [Member] Sales and marketing Selling and Marketing Expense [Member] General and administrative General and Administrative Expense [Member] Employee Service Share-based Compensation, Allocation of Recognized Period Costs Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Share-based compensation expense Allocated Share-based Compensation Expense Statement of Comprehensive Income [Abstract] Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Change in unrealized gains (losses) on investments Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax Change in unrealized gains (losses) on cash flow hedges Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent Revenue Revenue from Contract with Customer [Text Block] Subsequent Event [Abstract] Subsequent Event [Abstract] Subsequent event Subsequent Events [Text Block] Income Tax Disclosure [Abstract] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Unrecognized tax benefits at the beginning of the period Unrecognized Tax Benefits Additions for tax positions taken in prior years Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Reductions for tax positions taken in prior years Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Additions for tax positions taken in the current year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Unrecognized tax benefits at the end of the period Commitments and Contingencies Disclosure [Abstract] Leases [Abstract] Rent expense Operating Leases, Rent Expense Unrecorded Unconditional Purchase Obligation Unrecorded Unconditional Purchase Obligation [Table] Unrecorded Unconditional Purchase Obligation by Category of Item Purchased Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Unconditional Purchase Obligation, Category of Goods or Services Acquired Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Cloud and other services Cloud and Other Services [Member] Cloud and Other Services [Member] Unrecorded Unconditional Purchase Obligation Unrecorded Unconditional Purchase Obligation [Line Items] 2020 Unrecorded Unconditional Purchase Obligation, Due in Next Twelve Months 2021 Unrecorded Unconditional Purchase Obligation, Due within Two Years 2022 Unrecorded Unconditional Purchase Obligation, Due within Three Years 2023 Unrecorded Unconditional Purchase Obligation, Due within Four Years 2024 Unrecorded Unconditional Purchase Obligation, Due within Five Years 2025 and thereafter Unrecorded Unconditional Purchase Obligation, Due after Five Years Total other purchase commitments Unrecorded Unconditional Purchase Obligation Schedule of Share-based Compensation Arrangements by Share-based Payment Award Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type Award Type [Axis] Award Type Equity Award [Domain] Stock options Stock Options with Service Condition [Member] Stock Options with Service Condition [Member] PSOs Stock Options with Service and Market Conditions [Member] Stock Options with Service and Market Conditions [Member] Share-based Compensation Arrangement by Share-based Payment Award Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Options, Outstanding Roll Forward Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Balance, beginning (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Options granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Options exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Options forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Balance, ending (in shares) Options, Outstanding, Weighted Average Exercise Price Roll Forward Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Balance, beginning (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Options granted (in usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Options exercised (in usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Options forfeited (in usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Balance, ending (in usd per share) Options, Additional Disclosures Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Weighted-average remaining contractual life (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Options exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Options exercisable, weighted-average exercise price (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Options exercisable, weighted-average remaining contractual term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Options exercisable, aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Weighted-average grant-date fair value of options granted (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Total intrinsic value of options exercised in the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Debt Instrument Redemption Debt Instrument Redemption [Table] Debt Instrument Debt Instrument [Axis] Debt Instrument Debt Instrument, Name [Domain] 2019 Notes 2019 Notes [Member] 2019 Notes [Member] 2023 Notes 2023 Notes [Member] 2023 Notes [Member] Debt Instrument, Redemption Debt Instrument, Redemption [Line Items] Aggregate principal amount Debt Instrument, Face Amount Contractual interest rate (in percentage) Debt Instrument, Interest Rate, Stated Percentage Number of common stock convertible at initial conversion rate (in shares) Debt Instrument, Convertible, Number of Equity Instruments Initial conversion rate (in shares per $1000 principal amount) Debt Instrument, Convertible, Conversion Ratio Initial conversion price (in usd per share) Debt Instrument, Convertible, Conversion Price Threshold trading days (in days) Debt Instrument, Convertible, Threshold Trading Days Threshold consecutive trading days (in days) Debt Instrument, Convertible, Threshold Consecutive Trading Days Threshold percentage of stock price trigger (in percentage) Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Threshold business days, per $1,000 principal (in days) Debt Instrument, Convertible Per $1,000 Principal, Threshold Business Days Debt Instrument, Convertible Per $1,000 Principal, Threshold Business Days Threshold consecutive trading days, per $1,000 principal (in days) Debt Instruments, Convertible Per $1,000 Principal, Threshold Consecutive Trading Days Debt Instruments, Convertible Per $1,000 Principal, Threshold Consecutive Trading Days Threshold percentage of notes price trigger, per $1,000 principal (in percentage) Debt Instrument, Convertible, Threshold Percentage of Notes Price Trigger Debt Instrument, Convertible, Threshold Percentage of Notes Price Trigger Repurchase price as percentage of principal amount in event of change (in percentage) Debt Instrument Repurchase Price As Percentage Of Principal Amount Plus Accrued And Unpaid Interest In Event Of Change Debt Instrument Repurchase Price As Percentage Of Principal Amount Plus Accrued And Unpaid Interest In Event Of Change Fair value of convertible senior notes Convertible Debt, Fair Value Disclosures Impairment of property and equipment Impairment of Long-Lived Assets Held-for-use Concentration Risk Concentration Risk [Table] Concentration Risk Benchmark Concentration Risk Benchmark [Axis] Concentration Risk Benchmark Concentration Risk Benchmark [Domain] Accounts receivable Accounts Receivable [Member] Revenue Sales Revenue, Net [Member] Customer Customer [Axis] Customer Customer [Domain] Customer A Customer A [Member] Customer A [Member] Customer B Customer B [Member] Customer B [Member] Customer C Customer C [Member] Customer C [Member] Customer D Customer D [Member] Customer D Concentration Risk Concentration Risk [Line Items] Number of customers Concentration Risk, Number of Customers Concentration Risk, Number of Customers Percentage Concentration Risk, Percentage Federal: Federal Income Tax Expense (Benefit), Continuing Operations [Abstract] Current Current Federal Tax Expense (Benefit) Deferred Deferred Federal Income Tax Expense (Benefit) State: State and Local Income Tax Expense (Benefit), Continuing Operations [Abstract] Current Current State and Local Tax Expense (Benefit) Deferred Deferred State and Local Income Tax Expense (Benefit) Foreign: Foreign Income Tax Expense (Benefit), Continuing Operations [Abstract] Current Current Foreign Tax Expense (Benefit) Deferred Deferred Foreign Income Tax Expense (Benefit) Total Income Tax Expense (Benefit) Schedule of available-for-sale debt securities Debt Securities, Available-for-sale [Table Text Block] Contractual maturities of available-for-sale debt securities Investments Classified by Contractual Maturity Date [Table Text Block] United States Income (Loss) from Continuing Operations before Income Taxes, Domestic Foreign Income (Loss) from Continuing Operations before Income Taxes, Foreign Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Federal statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent State taxes, net of federal tax benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Effects of non-U.S. operations Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Effect of U.S. tax law change Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent Share-based compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Percent Amortization of deferred tax charges Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amortization, Percent Research credits Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent Non-deductible expenses Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent Other, net Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Total Effective Income Tax Rate Reconciliation, Percent Contractual interest expense Interest Expense, Debt, Excluding Amortization Amortization of debt discount Amortization of Debt Discount (Premium) Amortization of debt issuance costs Amortization of Debt Issuance Costs Total interest expense recognized Interest Expense, Debt Effective interest rate of the liability component (in percentage) Debt Instrument, Interest Rate, Effective Percentage Cost of subscription and support revenue Cost of subscription and support revenue [Member] Cost of subscription and support revenue [Member] Other assets Software development Software Development [Member] Range Range [Axis] Range Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Useful life (in years) Property, Plant and Equipment, Useful Life Capitalized internally developed software, net Internally Developed Capitalized Software, Net Internally Developed Capitalized Software, Net Capitalized internally developed software, amortization Internally Developed Capitalized Software, Amortization Internally Developed Capitalized Software, Amortization Weighted-average shares used to compute net loss per share, basic and diluted Weighted Average Number of Shares Outstanding, Basic and Diluted Net loss per share, basic and diluted Earnings Per Share, Basic and Diluted Other Income and Expenses [Abstract] Other Income, Net Other Nonoperating Income and Expense [Text Block] Convertible senior notes details Convertible Debt Other Details [Table Text Block] Convertible Debt Other Details [Table Text Block] 2019 Notes early conversions details Schedule of 2019 Notes Conversions [Table Text Block] [Table Text Block] for Schedule of 2019 Notes Conversions [Table] Components of convertible senior notes Convertible Debt [Table Text Block] Interest expense recognized related to the convertible senior notes Interest Income and Interest Expense Disclosure [Table Text Block] Note hedges details Schedule of Note Hedge Transactions [Table Text Block] [Table Text Block] for Schedule of Note Hedge Transactions [Table] Warrants details Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] Related Party Transactions [Abstract] Schedule of Related Party Transactions, by Related Party Schedule of Related Party Transactions, by Related Party [Table] Related Party Related Party [Axis] Related Party Related Party [Domain] Greylock Partners Greylock Partners [Member] Greylock Partners [Member] Related Party Transaction Related Party Transaction [Line Items] Consideration transferred Business Combination, Consideration Transferred, Related Party Business Combination, Consideration Transferred, Related Party Segment Reporting [Abstract] Long-lived assets by geographic areas Long-lived Assets by Geographic Areas [Table Text Block] Class of Warrant or Right Class of Warrant or Right [Table] Class of Warrant or Right Class of Warrant or Right [Axis] Class of Warrant or Right Class of Warrant or Right [Domain] 2019 Warrants 2019 Warrants [Member] 2019 Warrants [Member] 2023 Warrants 2023 Warrants [Member] 2023 Warrants [Member] Class of Warrant or Right Class of Warrant or Right [Line Items] Warrants sold, shares authorized to sell to counterparties (in shares) Class of Warrant or Right, Number of Securities Called by Warrants or Rights Strike price of warrants (in usd per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Proceeds from issuance of warrants Derivative Instruments and Hedging Activities Disclosure [Abstract] Maximum contract term of cash flow hedge (in months) Maximum Length of Time Hedged in Cash Flow Hedge Notional amount of derivatives Derivative, Notional Amount Cash Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Goodwill Identified intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Net assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Assets Acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Assets Acquired Net liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Liabilities Assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Liabilities Assumed Total Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Share-based Compensation, Performance Period Share-based Compensation, Performance Period [Axis] Share-based Compensation, Performance Period [Axis] Share-based Compensation, Performance Period Share-based Compensation, Performance Period [Domain] [Domain] for Share-based Compensation, Performance Period [Axis] Performance period 1 Performance Period 1 [Member] Performance Period 1 [Member] Performance period 2 Performance Period 2 [Member] Performance Period 2 [Member] Performance period 3 Performance Period 3 [Member] Performance Period 3 [Member] Performance period 4 Performance Period 4 [Member] Performance Period 4 [Member] Plan Name Plan Name [Axis] Plan Name Plan Name [Domain] 2012 Equity Incentive Plan 2012 Equity Incentive Plan [Member] 2012 Equity Incentive Plan [Member] 2012 Employee Stock Purchase Plan 2012 Employee Stock Purchase Plan [Member] 2012 Employee Stock Purchase Plan [Member] PSAs and PSUs Performance-Based Stock Award (“PSA”) and Performance-Based Stock Unit (“PSU”) [Member] Performance-Based Stock Award (“PSA”) and Performance-Based Stock Unit (“PSU”) [Member] ESPP Employee Stock Purchase Plan (ESPP) [Member] Employee Stock Purchase Plan (ESPP) [Member] Award vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Option expiration period (in years) Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Performance target stock price (in usd per share) Share-based Compensation Payment Award, Performance Target Stock Price, Common Stock Price Share-based Compensation Payment Award, Performance Target Stock Price, Common Stock Price Performance period (in years) Share-based Compensation Arrangement by Share-based Payment Award, Award Performance Period Share-based Compensation Arrangement by Share-based Payment Award, Award Performance Period PSOs to vest on anniversary of grant date, subject to continued service (in percentage) Performance stock options to vest on anniversary of grant date, subject to continued service Performance stock options to vest on anniversary of grant date, subject to continued service Shares reserved for future issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Increase in number of shares reserved for issuance on the first day of fiscal year, maximum (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Increase in number of shares reserved for issuance on the first day of fiscal year, maximum (in percentage) Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Outstanding Stock Maximum ESPP offering period (in months) Share-based Compensation Arrangement by Share-based Payment Award, Offering Period Share-based Compensation Arrangement by Share-based Payment Award, Offering Period Purchase price of common stock in percentage of the lower of the fair market value of our common stock on the first trading day of each offering period or on the exercise date (in percentage) Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent Purchase periods (in months) Share-based Compensation Arrangement by Share-based Payment Award, Purchase Period Share-based Compensation Arrangement by Share-based Payment Award, Purchase Period Number of purchase periods in each ESPP offering Purchase periods in employee stock purchase plan (ESPP) offering period Number of purchase periods in employee stock purchase plan (ESPP) offering period Maximum subscription rate (in percentage) Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate Purchase limit per employee, number of shares, during each offering period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares Per Employee Purchase limit per employee, total fair value of common stock, for each calendar year Share-based Compensation Arrangement by Share-based Payment Award, Maximum Purchase of Common Stock Value Per Employee Maximum purchase of common stock value per employee. Issuance of common stock in connection with employee stock purchase plan (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Average price of common stock purchased during the period (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Per Share Weighted Average Price of Shares Purchased Marketable Equity Securities Marketable Equity Securities [Table] Marketable Equity Securities [Table] Cash and cash equivalents Cash and Cash Equivalents [Member] Asset Class Asset Class [Axis] Asset Class Asset Class [Domain] Marketable equity securities Cash Equivalents [Member] Marketable Equity Securities [Line Items] Marketable Equity Securities [Line Items] Marketable Equity Securities [Line Items] Marketable equity securities Equity Securities, FV-NI Share-based compensation recognized for accelerated vesting of acquiree equity awards Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost Total compensation cost not yet recognized, nonvested awards Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Compensation expense not yet recognized, period for recognition (in years) Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Disaggregation of Revenue Disaggregation of Revenue [Table] Geographical Geographical [Axis] Geographical Geographical [Domain] United States UNITED STATES Other Americas Other Americas [Member] Other Americas [Member] Total Americas Americas [Member] EMEA EMEA [Member] APAC Asia Pacific [Member] Disaggregation of Revenue Disaggregation of Revenue [Line Items] Revenue Revenue from Contract with Customer, Excluding Assessed Tax Fair Value Measurements Fair Value Disclosures [Text Block] RSUs Restricted Stock Units (RSUs) [Member] PSUs Performance Stock Units (PSUs) [Member] Performance Stock Units (PSUs) [Member] RSUs and PSUs, Outstanding Roll Forward Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] Balance, beginning (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Balance, ending (in shares) RSUs and PSUs, Outstanding, 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] Balance, beginning (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (in usd 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 Vested (in usd 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 Forfeited (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Balance, ending (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] Weighted-average remaining contractual term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms Aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested Equity awards assumed (in shares) Business Acquisition, Equity Awards Assumed, Awards Assumed in Period Business Acquisition, Equity Awards Assumed, Awards Assumed in Period Replacement equity awards granted (in shares) Business Acquisition, Replacement Equity Awards, Grants in Period Business Acquisition, Replacement Equity Awards, Grants in Period Equity awards assumed, weighted-average grant date fair value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Awards Assumed in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Awards Assumed in Period, Weighted Average Grant Date Fair Value Replacement equity awards granted, weighted-average grant date fair value Share-based Compensation Arrangement by Share-based Payment Award, Replacement Equity Awards, Grants in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Replacement Equity Awards, Grants in Period, Weighted Average Grant Date Fair Value Total fair value of awards vested in the period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Schedule of Finite-Lived Intangible Assets Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets by Major Class Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name Finite-Lived Intangible Assets, Major Class Name [Domain] Developed technology Developed Technology Rights [Member] Customer relationships Customer Relationships [Member] Trade name and trademarks Trademarks and Trade Names [Member] Finite-Lived Intangible Assets Finite-Lived Intangible Assets [Line Items] Fair value of identified intangible assets acquired Finite-lived Intangible Assets Acquired Estimated useful life (in years) Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Line of Credit Facility Line of Credit Facility [Table] Credit Facility Credit Facility [Axis] Credit Facility Credit Facility [Domain] Revolving credit facility Revolving Credit Facility [Member] Variable Rate Variable Rate [Axis] Variable Rate Variable Rate [Domain] Base rate Base Rate [Member] LIBOR London Interbank Offered Rate (LIBOR) [Member] Line Of Credit Facility, Maturity Terms Line Of Credit Facility, Maturity Terms [Axis] Line Of Credit Facility, Maturity Terms [Axis] Line Of Credit Facility, Maturity Terms Line Of Credit Facility, Maturity Terms [Domain] [Domain] for Line Of Credit Facility, Maturity Terms [Axis] Minimum maturity date term criteria Term 2 [Member] Term 2 [Member] Minimum maturity date term, cash and cash equivalents balance criteria Term 2b [Member] Term 2b [Member] Line of Credit Facility Line of Credit Facility [Line Items] Current borrowing capacity Line of Credit Facility, Current Borrowing Capacity Option for additional borrowing capacity Line of Credit Facility, Option for Additional Borrowing Capacity1 Line of Credit Facility, Option for Additional Borrowing Capacity Number of days prior to maturity of 2023 Notes (in days) Debt Instrument, Number Of Days Prior To Stated Maturity Date Debt Instrument, Number Of Days Prior To Stated Maturity Date Amount added to outstanding principal amount of 2023 Notes in minimum maturity date criteria Line Of Credit Facility, Minimum Maturity Date Term, Amount Added to Outstanding Principal Amount of 2023 Notes in Criteria for Maturity Date Line Of Credit Facility, Minimum Maturity Date Term, Amount Added to Outstanding Principal Amount of 2023 Notes in Criteria for Maturity Date Spread on variable rate Debt Instrument, Basis Spread on Variable Rate Commitment fee rate on undrawn amounts (in percentage) Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Revolving credit facility amount outstanding Long-term Line of Credit Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities Antidilutive Securities [Axis] Antidilutive Securities, Name Antidilutive Securities, Name [Domain] Convertible senior notes Convertible Debt Securities [Member] Warrants related to the issuance of convertible senior notes Warrant [Member] RSUs and PSUs Restricted Stock Units (RSUs) and Performance Stock Units (PSUs) [Member] Restricted Stock Units (RSUs) and Performance Stock Units (PSUs) [Member] Options to purchase common stock, including PSOs Employee Stock Option [Member] RSAs and PSAs Restricted Stock [Member] ESPP shares Employee Stock [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive securities (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Segment Information Segment Reporting Disclosure [Text Block] Equity [Abstract] Stockholders’ Equity Stockholders' Equity Note Disclosure [Text Block] Schedule of Operating Leased Assets Schedule of Operating Leased Assets [Table] Lease Arrangements Lease Arrangement, Type [Axis] Lease Arrangements Lease Arrangement, Type [Domain] Q415 and Q116 new lease arrangements - new corporate headquarters Q415 and Q116 new lease arrangements - new corporate headquarters [Member] Q415 and Q116 new lease arrangements - new corporate headquarters [Member] Q415 new lease arrangements - previous corporate headquarters Q415 New Lease Arrangements - previous corporate headquarters [Member] Q415 New Lease Arrangements - previous corporate headquarters [Member] Q218 new sublease arrangement - previous corporate headquarters Q218 New Sublease Arrangement - previous corporate headquarters [Member] Q218 New Sublease Arrangement - previous corporate headquarters [Member] Q113 new lease arrangements - previous corporate headquarters Q113 New Lease Arrangements - Previous Corporate Headquarters [Member] Q113 New Lease Arrangements - Previous Corporate Headquarters [Member] Operating Leased Assets [Line Items] Operating Leased Assets [Line Items] Number of lease agreements Number of Lease Agreements Number of Lease Agreements Area of office space (in square feet) Area of Real Estate Property Increase in annual rental payments for fiscal 2018 Increase In Annual Rental Payments, Current Fiscal Year Increase In Annual Rental Payments, Current Fiscal Year Increase in annual rental payments for fiscal 2019 Increase In Annual Rental Payments, Due In Two Years Increase in annual rental payments, due in two years Increase in annual rental payments for fiscal 2020 Increase In Annual Rental Payments, Due In Three Years Increase in annual rental payments, due in three years Cash reimbursement from lessors Cash Reimbursement From Lessors Cash reimbursement from lessors Number of lease renewal options Number of Lease Renewal Options Number of Lease Renewal Options Renewal term (in years) Lessee, Operating Lease, Renewal Term Total payments under the lease agreements Operating Leases, Future Minimum Payments Due Cease-use loss related to facility exit Proceeds from sublease Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals Liability release through rental payments Restructuring Reserve, Period Increase (Decrease) Cease-use liability Restructuring Reserve Revenue from Contract with Customer Revenue from Contract with Customer [Table] Revenue from Contract with Customer [Table] Revenue from Contract with Customer Revenue from Contract with Customer [Line Items] [Line Items] for Revenue from Contract with Customer [Table] Contract term of subscription and support contracts Revenue, Performance Obligation, Contract Term Revenue, Performance Obligation, Contract Term Shares Available for Grant Roll Forward Share-based Compensation Arrangement by Share-based Payment Award, Shares Available for Grant [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Shares Available for Grant [Roll Forward] Shares available for grant, beginning (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Authorized (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Options, RSUs, and PSUs granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Grants in Period Share-based Compensation Arrangement by Share-based Payment Award, Number of Grants in Period PSOs, RSAs, PSAs, and RSUs forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Forfeitures in Period Share-based Compensation Arrangement by Share-based Payment Award, Number of Forfeitures in Period Shares withheld for taxes (in shares) Shares Paid for Tax Withholding for Share Based Compensation Shares available for grant, ending (in shares) Schedule of property and equipment Property, Plant and Equipment [Table Text Block] Commitments and contingencies Commitments and Contingencies Disclosure [Text Block] Income Taxes Income Tax Disclosure [Text Block] Description of business, basis of presentation, principles of consolidation, and summary of significant accounting policies Business Description and Accounting Policies [Text Block] Valuation allowance increase Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Unrecognized tax benefits Unrecognized tax benefits that would affect income tax expense Unrecognized Tax Benefits that Would Impact Effective Tax Rate Income tax expense related to interest and penalties Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Interest and penalties accrued Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Undistributed earnings of foreign subsidiaries Undistributed Earnings of Foreign Subsidiaries Schedule of fair value of financial assets and liabilities Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Components of Deferred Tax Assets and Liabilities Components of Deferred Tax Assets and Liabilities [Abstract] Deferred tax assets: Deferred Tax Assets, Net of Valuation Allowance [Abstract] Accruals and reserves Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals Deferred revenue Deferred Tax Assets, Deferred Income Net operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Research and development and foreign tax credits Deferred Tax Assets, Tax Credit Carryforwards Share-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Gross deferred tax assets Deferred Tax Assets, Gross Valuation allowance Deferred Tax Assets, Valuation Allowance Total deferred tax assets Deferred Tax Assets, Net of Valuation Allowance Deferred tax liabilities: Components of Deferred Tax Liabilities [Abstract] Fixed assets and intangible assets Deferred Tax Liabilities, Property, Plant, and Equipment and Intangible Assets Deferred Tax Liabilities, Property, Plant, and Equipment and Intangible Assets Deferred commissions Deferred Tax Liabilities, Deferred Expense Other deferred tax liabilities Deferred Tax Liabilities, Other Total deferred tax liabilities Deferred Tax Liabilities, Gross Total Deferred Tax Assets, Net Share Repurchase Programs Share Repurchase Programs [Table] Share Repurchase Programs [Table] Share Repurchase Program Share Repurchase Program [Axis] Share Repurchase Program Share Repurchase Program [Domain] Share repurchase program A Share Repurchase Program A [Member] Share Repurchase Program A [Member] Share repurchase program B Share Repurchase Program B [Member] Share Repurchase Program B [Member] Share Repurchase Programs Share Repurchase Programs [Line Items] [Line Items] for Share Repurchase Programs [Table] Share repurchase, authorized amount Stock Repurchase Program, Authorized Amount Share repurchase, total authorized amount Stock Repurchase Program Total Authorized Amount1 Total stock repurchase program authorized amount. Repurchase and retirement of common stock (in shares) Repurchase and retirement of common stock Share repurchase program expiration date Stock Repurchase Program Expiration Date Share repurchase, remaining authorized repurchase amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Schedule of goodwill Schedule of Goodwill [Table Text Block] Schedule of finite-lived intangible assets by major class Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block] Schedule of indefinite-lived intangible assets by major class Schedule of Acquired Indefinite-lived Intangible Assets by Major Class [Table Text Block] Future amortization expense of intangible assets Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Income Statement [Abstract] Revenue from External Customers by Products and Services Revenue from External Customers by Products and Services [Table] Revenue: Revenue from External Customer [Line Items] Cost of revenue: Cost of Goods and Services Sold [Abstract] Cost of revenue Cost of Goods and Services Sold Total gross profit Gross Profit Operating expenses: Operating Expenses [Abstract] Research and development Research and Development Expense Sales and marketing Selling and Marketing Expense General and administrative General and Administrative Expense Total operating expenses Operating Expenses Operating income (loss) Operating Income (Loss) Interest expense Interest Expense Other income, net Other Nonoperating Income (Expense), Net Other Nonoperating Income (Expense), Net Provision for income taxes Net income (loss) Reconciliation of cash, cash equivalents, and restricted cash to the balance sheets [Abstract] Reconciliation of cash, cash equivalents, and restricted cash to the balance sheets [Abstract] Reconciliation of cash, cash equivalents, and restricted cash to the balance sheet Reconciliation of cash, cash equivalents, and restricted cash [Table] Reconciliation of cash, cash equivalents, and restricted cash [Table] Prepaid expenses and other current assets Reconciliation of cash, cash equivalents, and restricted cash Reconciliation of cash, cash equivalents, and restricted cash [Line Items] [Line Items] for Reconciliation of cash, cash equivalents, and restricted cash [Table] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash Restricted Cash Total cash, cash equivalents, and restricted cash Restricted common stock Restricted common stock issued (in shares) Schedule of purchase consideration Schedule of Business Acquisitions, by Acquisition [Table Text Block] Schedule of recognized identified assets acquired and liabilities assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Schedule of finite-lived intangible assets acquired as part of business combination Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award RSAs Restricted Stock Awards (RSAs) [Member] Restricted Stock Awards (RSAs) [Member] PSAs Performance Shares [Member] RSAs and PSAs, Outstanding Roll Forward RSAs and PSAs, Outstanding, Weighted Average Grant-Date Fair Value Per Share Debt Securities, Available-for-sale Debt Securities, Available-for-sale [Table] Cash equivalents Investments Investments [Member] Debt Securities, Available-for-sale Debt Securities, Available-for-sale [Line Items] Amortized cost Debt Securities, Available-for-sale, Amortized Cost Unrealized gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Unrealized losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Fair value Debt Securities, Available-for-sale Percentage of voting interest acquired Business Acquisition, Percentage of Voting Interests Acquired Total fair value of equity awards assumed Business Acquisition, Equity Awards Assumed, Fair Value Business Acquisition, Equity Awards Assumed, Fair Value Total fair value of replacement equity awards Business Acquisition, Replacement Equity Awards, Fair Value Business Acquisition, Replacement Equity Awards, Fair Value Depreciation expense Depreciation Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] 2020 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2021 Operating Leases, Future Minimum Payments, Due in Two Years 2022 Operating Leases, Future Minimum Payments, Due in Three Years 2023 Operating Leases, Future Minimum Payments, Due in Four Years 2024 Operating Leases, Future Minimum Payments, Due in Five Years 2025 and thereafter Operating Leases, Future Minimum Payments, Due Thereafter Committed gross lease payments Less: proceeds from sublease rentals Net operating lease obligation Operating Leases, Future Minimum Payments Due, Excluding Sublease Income Operating Leases, Future Minimum Payments Due, Excluding Sublease Income Debt Debt Disclosure [Text Block] Revenue from external customers by geographic areas Revenue from External Customers by Geographic Areas [Table Text Block] Revenue from external customers by products and services Revenue from External Customers by Products and Services [Table Text Block] Schedule of components of income (loss) before income tax, domestic and foreign Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Schedule of provision for income taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of effective income tax rate reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of components of deferred tax assets and liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Schedule of gross unrecognized tax benefits roll-forward Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Related Party Transactions Related Party Transactions Disclosure [Text Block] Deferred contract costs, amortization period Capitalized Contract Cost, Amortization Period Subscription Subscription [Member] Subscription [Member] Support Support [Member] Support [Member] Amortization expense Amortization of Intangible Assets Quarterly Financial Information Disclosure [Abstract] Other income, net Other Nonoperating Income (Expense) Provision for (benefit from) income taxes Net income (loss) per share, basic Earnings Per Share, Basic Net income (loss) per share, diluted Earnings Per Share, Diluted Remaining performance obligations Revenue, Remaining Performance Obligation, Amount Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Remaining performance obligations, expected timing of satisfaction, period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Schedule of components of other income, net Schedule of Other Nonoperating Income, by Component [Table Text Block] Manufacturing products and components Inventories [Member] Manufacturing purchase commitments Schedule of Indefinite-Lived Intangible Assets Schedule of Indefinite-Lived Intangible Assets [Table] Indefinite-lived Intangible Assets Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets, Major Class Name Indefinite-lived Intangible Assets, Major Class Name [Domain] In-process research and development In Process Research and Development [Member] Indefinite-lived Intangible Assets Indefinite-lived Intangible Assets [Line Items] Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract] Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract] In-process research and development Indefinite-lived Intangible Assets (Excluding Goodwill) Total purchased intangible assets, gross carrying amount Intangible Assets, Gross (Excluding Goodwill) Total purchased intangibles, net carrying amount Intangible Assets, Net (Excluding Goodwill) Acquired intellectual property Patents [Member] Trade name and trademarks Other Other Intangible Assets [Member] Gross carrying amount Finite-Lived Intangible Assets, Gross Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Net carrying amount Finite-Lived Intangible Assets, Net Interest income Interest Income, Other Foreign currency exchange gains (losses), net Foreign Currency Transaction Gain (Loss), before Tax Other Other Nonoperating Expense Total other income, net Amortized Cost Debt Securities, Available-for-sale, Amortized Cost, Fiscal Year Maturity [Abstract] Due within one year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost Due between one and three years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Amortized Cost Total amortized cost Fair Value Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract] Due within one year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Due between one and three years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value Total fair value Schedule of quarterly financial data (unaudited) Quarterly Financial Information [Table Text Block] Statement of Financial Position [Abstract] Assets Assets [Abstract] Current assets: Assets, Current [Abstract] Short-term investments Short-term Investments Accounts receivable, net of allowance for doubtful accounts of $0.8 and $1.2 at July 31, 2019 and July 31, 2018, respectively Accounts Receivable, Net, Current Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property and equipment, net Long-term investments Long-term Investments Intangible assets, net Other assets Other Assets, Noncurrent Total assets Assets Liabilities, temporary equity, and stockholders’ equity Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued compensation Employee-related Liabilities, Current Accrued and other liabilities Accrued Liabilities, Current Deferred revenue Contract with Customer, Liability, Current Convertible senior notes, net Convertible Debt, Current Total current liabilities Liabilities, Current Convertible senior notes, net Convertible Debt, Noncurrent Long-term deferred revenue Contract with Customer, Liability, Noncurrent Other long-term liabilities Other Liabilities, Noncurrent Commitments and contingencies (Note 11) Commitments and Contingencies Temporary equity Temporary Equity, Carrying Amount, Attributable to Parent Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock; $0.0001 par value; 100.0 shares authorized; none issued and outstanding at July 31, 2019 and July 31, 2018 Preferred Stock, Value, Issued Common stock and additional paid-in capital; $0.0001 par value; 1,000.0 shares authorized; 96.8 and 93.6 shares issued and outstanding at July 31, 2019 and July 31, 2018, respectively Common Stocks, Including Additional Paid in Capital Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated deficit Retained Earnings (Accumulated Deficit) Total stockholders’ equity Stockholders' Equity Attributable to Parent Total liabilities, temporary equity, and stockholders’ equity Liabilities and Equity Equity Award Plans Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Subsequent Event Subsequent Event [Table] Zingbox, Inc. Zingbox, Inc. [Member] Zingbox, Inc. [Member] Subsequent Event Type Subsequent Event Type [Axis] Subsequent Event Type Subsequent Event Type [Domain] Subsequent event Subsequent Event [Member] Subsequent Event Subsequent Event [Line Items] Total consideration Schedule of Extinguishment of Debt Schedule of Extinguishment of Debt [Table] Repayments Of Convertible Debt, Timing Repayments Of Convertible Debt, Timing [Axis] Repayments Of Convertible Debt, Timing [Axis] Repayments Of Convertible Debt, Timing Repayments Of Convertible Debt, Timing [Domain] [Domain] for Repayments Of Convertible Debt, Timing [Axis] Repayment at early conversion Repayment, At Early Conversion [Member] Repayment, At Early Conversion [Member] Repayment at maturity date Repayment, At Maturity Date [Member] Repayment, At Maturity Date [Member] Extinguishment of Debt Extinguishment of Debt [Line Items] Shares of common stock issued in connection with conversion of convertible senior notes (in shares) Debt Conversion, Converted Instrument, Shares Issued Repayments of convertible senior notes allocated to liability component Repayments of Convertible Debt, Debt Liability Component Repayments of Convertible Debt, Debt Liability Component Repayments of convertible senior notes allocated to equity component Repayments of Convertible Debt, Debt Equity Component Repayments of Convertible Debt, Debt Equity Component Repayments of convertible senior notes Repayments of Convertible Debt Operating Loss Carryforwards Operating Loss Carryforwards [Table] Income Tax Authority Income Tax Authority [Axis] Income Tax Authority Income Tax Authority [Domain] Federal Internal Revenue Service (IRS) [Member] State State and Local Jurisdiction [Member] Foreign Foreign Tax Authority [Member] Operating Loss Carryforwards Operating Loss Carryforwards [Line Items] Operating loss carryforwards Operating Loss Carryforwards Revenue recognized from opening deferred revenue balance Contract with Customer, Liability, Revenue Recognized Schedule of stock option activities Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of restricted stock award (“RSA”), performance-based stock award (“PSA”), restricted stock unit (”RSU”), and performance stock unit (“PSU”) activities Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Schedule of shares available for grant Schedule of Share-based Compensation, Shares Available for Grant [Table Text Block] Schedule of Share-based Compensation, Shares Available for Grant [Table Text Block] Schedule of assumptions used and resulting grant-date fair values of our PSOs Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of assumptions used and resulting grant-date fair values of our ESPP Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] Schedule of allocation of share-based compensation expense Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Schedule of future non-cancelable minimum rental payments for operating leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Schedule of future non-cancelable purchase commitments for cloud and other services Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block] Principal Long-term Debt, Gross Less: debt discount and debt issuance costs, net of amortization Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Net carrying amount Long-term Debt Equity component (including temporary equity) Debt Instrument, Convertible, Carrying Amount of Equity Component Goodwill and Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Selected Quarterly Financial Data (Unaudited) Quarterly Financial Information [Text Block] Schedule of expected impact from adoption of new accounting pronouncement - Accounting for revenue contracts with customers Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Expected volatility rate (in percentage) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected volatility rate, minimum (in percentage) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Expected volatility rate, maximum (in percentage) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Expected term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected dividend rate (in percentage) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Risk free interest rate (in percentage) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Risk-free interest rate, minimum (in percentage) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Risk free interest rate, maximum (in percentage) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Grant-date fair value per share, minimum Share -Based Compensation Arrangement by Share-Based Payment Award, ESPP,Grant Date Fair Value, Minimum Share-based Compensation Arrangement by Share-based Payment Award, Employee Stock Purchase Plan, Grants in Period, Grant Date Fair Value, Minimum Grant date fair value per share, maximum Share-based Compensation Arrangement by Share-based Payment Award, ESPP, Grant Date Fair Value, Maximum Share-based Compensation Arrangement by Share-based Payment Award, ESPP, Grant Date Fair Value, Maximum Tax Credit Carryforward Tax Credit Carryforward [Table] Tax Credit Carryforward Tax Credit Carryforward [Axis] Tax Credit Carryforward, Name Tax Credit Carryforward, Name [Domain] Research tax credit carryforward Research Tax Credit Carryforward [Member] Tax Credit Carryforward Tax Credit Carryforward [Line Items] Tax credit carryforward Tax Credit Carryforward, Amount Number of reportable segments Number of Reportable Segments Document and Entity Information [Abstract] Document and Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company Entity Small Business Entity Small Business Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Public Float Entity Public Float New Accounting Pronouncements or Change in Accounting Principle New Accounting Pronouncements or Change in Accounting Principle [Table] Adjustments for New Accounting Pronouncements Adjustments for New Accounting Pronouncements [Axis] Type of Adoption Type of Adoption [Domain] New accounting pronouncement - 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