Other Income and Expenses [Abstract] Interest and Other Expense, net Other Income and Other Expense Disclosure [Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] Statement [Table] Statement [Table] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] Partner Program reserves Partner Program Reserves [Member] Partner Program Reserves [Member] Restructuring and other facility exit costs SEC Schedule, 12-09, Reserve, Business Restructuring [Member] Statement [Line Items] Statement [Line Items] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] Balance at the Beginning of Year SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount Additions Charged to Costs and Expenses or Revenues SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense Deductions and Write-Offs SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction Balance at End of Year Retirement Benefits [Abstract] Defined Benefit Plan, Expected Future Benefit Payment [Abstract] Defined Benefit Plan, Expected Future Benefit Payment [Abstract] 2021 Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months 2022 Defined Benefit Plan, Expected Future Benefit Payment, Year Two 2023 Defined Benefit Plan, Expected Future Benefit Payment, Year Three 2024 Defined Benefit Plan, Expected Future Benefit Payment, Year Four 2025 Defined Benefit Plan, Expected Future Benefit Payment, Year Five 2026-2030 Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter Total Defined Benefit Plan, Expected Future Benefit Payment, Remainder of Fiscal Year Business Combinations [Abstract] Schedule of Fair Value of the Assets Acquired and Liabilities Assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Business Acquisition, Pro Forma Information Business Acquisition, Pro Forma Information [Table Text Block] Accounting Policies [Abstract] Advertising Expense Advertising Expense Revenue from Contract with Customer [Abstract] Revenue from External Customers by Products and Services [Table] Revenue from External Customers by Products and Services [Table] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Impact from the adoption of ASC 606 and 340-40 Accounting Standards Update 2014-09 [Member] Accounting Standards Update 2014-09 - Revenue From Contracts with Customer Accounting Standards Update 2014-09 - Revenue From Contracts with Customer [Member] Accounting Standards Update 2014-09 - Revenue From Contracts with Customer [Member] Accounting Standards Update 2014-09 - Costs to Acquire a Contract from a Customer Accounting Standards Update 2014-09 - Costs to Acquire a Contract from a Customer [Member] Accounting Standards Update 2014-09 - Costs to Acquire a Contract from a Customer [Member] Statistical Measurement [Axis] Statistical Measurement [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Revenue from External Customer [Line Items] Revenue from External Customer [Line Items] Subscription payment terms Subscription Payment Terms Subscription Payment Terms EBA payment terms EBA Payment Terms EBA Payment Terms Contract with customer, liability, revenue recognized Contract with Customer, Liability, Revenue Recognized Cumulative effect on retained earnings Cumulative Effect on Retained Earnings, Net of Tax Expected Future Amortization Expense for Purchased Technologies, Customer Relationships and Trade Name [Abstract] Expected Future Amortization Expense for Purcahsed Technologies, Customer Relationships and Trade Name [Abstract] Expected Future Amortization Expense for Purcahsed Technologies, Customer Relationships and Trade Name [Abstract] 2021 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2023 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2024 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2025 Finite-Lived Intangible Assets, Amortization Expense, Year Five Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Total Finite-Lived Intangible Assets, Estimated Future Amortization Expense Finite-Lived Intangible Assets, Estimated Future Amortization Expense Income Tax Disclosure [Abstract] 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] Gross unrecognized tax benefits at the beginning of the fiscal year Unrecognized Tax Benefits Increases for tax positions of prior years Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Decreases for tax positions of prior years Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Increases for tax positions related to the current year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Decreases relating to settlements with taxing authorities Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Reductions as a result of lapse of the statute of limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Gross unrecognized tax benefits at the end of the fiscal year Investments, All Other Investments [Abstract] Securities in continuous unrealized loss position for greater than twelve months Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Available-for-sale securities gross gains (losses) Debt Securities, Available-for-sale, Realized Gain (Loss) Proceeds from sale and maturity of marketable securities Proceeds from Sale and Maturity of Marketable Securities Non-marketable equity securities investments without readily determinable fair value Equity Securities without Readily Determinable Fair Value, Amount Positive adjustment on privately held investments Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount Cumulative adjustment on certain of its privately held investments Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Cumulative Amount Other than temporary impairment losses, investments Other than Temporary Impairment Losses, Investments Cumulative impairments and negative adjustments on certain of its privately held investments Equity Securities without Readily Determinable Fair Value, Impairment Loss, Cumulative Amount New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Restatement [Axis] Restatement [Axis] Restatement [Domain] Restatement [Domain] Restatement Adjustment Restatement Adjustment [Member] As reported Previously Reported [Member] Accounting Standards Update 2016-02 Accounting Standards Update 2016-02 [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] ASSETS Assets [Abstract] Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Total assets Assets LIABILITIES AND STOCKHOLDERS’ DEFICIT Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Other accrued liabilities Other Accrued Liabilities, Current Operating lease liabilities Operating Lease, Liability, Current Long-term operating lease liabilities Operating Lease, Liability, Noncurrent Long-term other liabilities Other Liabilities, Noncurrent Accumulated deficit Retained Earnings (Accumulated Deficit) Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common stock and additional paid-in capital Common Stock [Member] Accumulated other comprehensive loss AOCI Attributable to Parent [Member] Accumulated deficit Retained Earnings [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning Balance (in shares) Common Stock, Shares, Outstanding Beginning Balance Stockholders' Equity Attributable to Parent Common shares issued under stock plans (in shares) Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Common shares issued under stock plans Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture Stock-based compensation expense APIC, Share-based Payment Arrangement, Increase for Cost Recognition Settlement of liability-classified restricted stock units Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Share-based Liabilities Paid Pre-combination expense related to equity awards assumed Adjustments To Additional Paid In Capital, Acquisitions, Purchase Accounting Adjustment Adjustments To Additional Paid In Capital, Acquisitions, Purchase Accounting Adjustment Cumulative effect of adoption of accounting standards Cumulative Effect of Accounting Change Cumulative Effect of Accounting Change Net income (loss) Net Income (Loss) Attributable to Parent Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Shares issued as consideration for business combination (in shares) Stock Issued During Period, Shares, Acquisitions Shares issued as consideration for business combination Stock Issued During Period, Value, Acquisitions Repurchase and retirement of common shares (in shares) Stock Repurchased and Retired During Period, Shares Repurchase and retirement of common shares Stock Repurchased and Retired During Period, Value Ending Balance (in shares) Ending Balance Schedule of Long Lived Assets Held-for-sale [Table] Schedule of Long Lived Assets Held-for-sale [Table] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] U.S. UNITED STATES Other Americas Other Americas [Member] Other Americas Americas Americas [Member] Europe, Middle East, and Africa EMEA [Member] Total long-lived assets Asia [Member] Long Lived Assets Held-for-sale [Line Items] Long Lived Assets Held-for-sale [Line Items] Number of operating segments Number of Operating Segments Total long-lived assets Long-Lived Assets Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Level 3 Fair Value, Inputs, Level 3 [Member] Fair Value by Asset Class [Axis] Asset Class [Axis] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, by Asset Class [Domain] Asset Class [Domain] Derivative Contracts Derivative [Member] Convertible Debt Securities Convertible Debt Securities [Member] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Beginning balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Impairments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) (Losses) gains included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Losses included in OCI Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Ending balance Quarterly Financial Information Disclosure [Abstract] Selected Quarterly Financial Information (Unaudited) Quarterly Financial Information [Text Block] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Software and Software Development Costs Software and Software Development Costs [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Abstract] Useful life Property, Plant and Equipment, Useful Life Depreciation Depreciation Computer hardware, at cost Computer Hardware Gross Computer Hardware, Gross Computer software, at cost Capitalized Computer Software, Gross Leasehold improvements, land and buildings, at cost Building And Leasehold Improvements Gross Carrying amount at the balance sheet date of long-lived, depreciable assets that include building structures held for productive use including any addition, improvement, or renovation to the structure as well as the addition of improvements to assets held under lease arrangements. Furniture and equipment, at cost Furniture and Fixtures, Gross Computer software, hardware, leasehold improvements, furniture, and equipment, at cost Property, Plant and Equipment, Gross Less: Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Computer software, hardware, leasehold improvements, furniture, and equipment, net Property, Plant and Equipment, Net Capitalized software development costs Capitalized Software Development Costs for Software Sold to Customers Amortization Amortization Share-based Payment Arrangement [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Award Type [Domain] Award Type [Domain] Restricted Stock Units (RSUs) and Performance Stock Units (PSUs) Restricted Stock Units (RSUs) and Performance Shares [Member] Restricted Stock Units (RSUs) and Performance Shares [Member] Performance Stock Unit Performance Shares [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Unreleased Restricted Stock Units (in thousands) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Unvested restricted stock, beginning balance (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 Canceled/Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Performance adjustment (in shares) Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Adjustments In Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Performance Adjustment In Period Unvested restricted stock, ending balance (in shares) 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] Unvested restricted stock, beginning balance (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 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 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 Canceled/Forfeited (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 Performance adjustment (in dollars per share) Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Adjustments, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Performance Adjustment, Weighted Average Grant Date Fair Value Unvested restricted stock, ending balance (in dollars per share) Performance shares payout Performance Shares, Units, Payout Percentage Performance Shares, Units, Payout Percentage Leases [Abstract] Lease Cost and Cash Flow Information Lease, Cost [Table Text Block] Future Minimum Lease Payments Lessee, Operating Lease, Liability, Maturity [Table Text Block] Rent Expense Related to Operating Leases Schedule of Rent Expense [Table Text Block] Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Senior Notes Senior Notes [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Face amount Debt Instrument, Face Amount Stated interest rate Debt Instrument, Interest Rate, Stated Percentage Repayments of debt Repayments of Debt Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Equity Compensation Plans Approved by Security Holders Equity Compensation Plans Approved By Security Holders [Member] Equity Compensation Plans Approved by Security Holders ESP Plan Employee Qualified Stock Purchase Plan 1998 ESP Plan [Member] Employee Qualified Stock Purchase Plan 1998 ESP Plan [Member] Number of securities to be issued upon exercise or vesting of outstanding options and awards (in shares) Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares To Be Issued Upon Exercise Of Outstanding Awards Share Based Compensation Arrangement by Share Based Payment Award, Number of Shares to be Issued Upon Exercise of Outstanding Awards Weighted-average exercise price of outstanding options (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column (a)) (in shares) Employee Stock Plan Shares Remaining Available For Issuance Shares remaining available for issuance for the plan. Statement of Comprehensive Income [Abstract] Net income (loss) Other comprehensive income (loss), net of reclassifications: Other Comprehensive Income (Loss), Net of Tax [Abstract] Net (loss) gain on derivative instruments (net of tax effect of ($1.1), ($1.1), and $3.2) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent Net (loss) gain on derivative instruments (net of tax effect of ($1.1), ($1.1), and $3.2) Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent Change in net unrealized gain (loss) on available-for-sale securities (net of tax effect of ($0.4), $0.0, and $0.1) Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Change in defined benefit pension items (net of tax effect of $1.6, ($2.0), and ($0.7)) Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent Net change in cumulative foreign currency translation (loss) gain (net of tax effect of $0.1, $0.5, and ($4.8)) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Total other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Total comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Accumulated Other Comprehensive Loss Comprehensive Income (Loss) Note [Text Block] Statement of Financial Position [Abstract] Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares outstanding (in shares) Income Taxes [Table] Income Taxes [Table] Income Taxes [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Domestic Country Domestic Tax Authority [Member] State and Local Jurisdiction State and Local Jurisdiction [Member] Foreign Country Foreign Tax Authority [Member] Tax Credit Carryforward [Axis] Tax Credit Carryforward [Axis] Tax Credit Carryforward, Name [Domain] Tax Credit Carryforward, Name [Domain] Research Tax Credit Carryforward Research Tax Credit Carryforward [Member] Ireland, Netherlands, and Singapore Ireland, Netherlands, And Singapore [Member] Ireland, Netherlands, And Singapore [Member] Ireland IRELAND SINGAPORE SINGAPORE Canada CANADA Income Taxes [Line Items] Income Taxes [Line Items] Income Taxes [Line Items] Foreign pretax income (loss) Income (Loss) from Continuing Operations before Income Taxes, Foreign Valuation allowance increase (decrease) Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Valuation allowance release, non-cash benefit Valuation Allowance Release, Non-cash Benefit Valuation Allowance Release, Non-cash benefit Valuation allowance adjustment Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Deferred tax assets, net Deferred Tax Assets, Net Tax Cuts and Jobs Act, provisional income tax benefit Tax Cuts and Jobs Act, Incomplete Accounting, Provisional Income Tax Expense (Benefit) Tax Cuts and Jobs Act, Incomplete Accounting, Provisional Income Tax Expense (Benefit) Tax Cuts and Jobs Act, provisional transition tax for accumulated foreign earnings Tax Cuts And Jobs Act, Incomplete Accounting, Transition Tax For Accumulated Foreign Earnings, Provisional Income Tax Expense Tax Cuts And Jobs Act, Incomplete Accounting, Transition Tax For Accumulated Foreign Earnings, Provisional Income Tax Expense Tax Cuts and Jobs Act, transition tax for accumulated foreign earnings Tax Cuts And Jobs Act, Transition Tax For Accumulated Foreign Earnings, Income Tax Expense Tax Cuts And Jobs Act, Transition Tax For Accumulated Foreign Earnings, Income Tax Expense Tax Cuts and Jobs Act, transition tax, adjustment for foreign tax credits Tax Cuts and Jobs Act, Transition Tax, Adjustment, Foreign Tax Credits Tax Cuts and Jobs Act, Transition Tax, Adjustment, Foreign Tax Credits Deferred Tax Asset, Foreign Tax Credit Deferred Tax Asset, Foreign Tax Credit Deferred Tax Asset, Foreign Tax Credit Deferred income taxes, net Deferred Tax Assets, Net of Valuation Allowance Foreign tax credit carryforwards Deferred Tax Assets, Tax Credit Carryforwards, Foreign Operating loss carryforwards Operating Loss Carryforwards Tax credit carryforward Tax Credit Carryforward, Amount Gross unrecognized tax benefits Unrecognized tax benefits that would reduce the valuation allowance if recognized Unrecognized Tax Benefits that Would Impact The Valuation Allowance Unrecognized Tax Benefits that Would Impact The Valuation Allowance Amount of gross unrecognized tax benefits that would impact the effective tax rate, if recognized Unrecognized Tax Benefits that Would Impact Effective Tax Rate Unrecognized tax benefits Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Income tax expense from penalties and interest Income Tax Examination, Penalties and Interest Expense Foreign income tax expense (benefit) Foreign Income Tax Expense (Benefit), Continuing Operations Income tax benefits per share (in dollars per share) Income Tax Holiday, Income Tax Benefits Per Share Financial Statement Schedule II SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Pre-tax intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Weighted average grant date fair value per share of stock options assumed from acquisition (in dollars per share) Share-based Compensation Arrangement By Share-based Payment Award, Options, Acquired In Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement By Share-based Payment Award, Options, Acquired In Period, Weighted Average Grant Date Fair Value Income Statement [Abstract] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Subscription and Maintenance Subscription and Maintenance [Member] Subscription and Maintenance [Member] Subscription Subscription and Circulation [Member] Maintenance Maintenance [Member] Other Product and Service, Other [Member] Net revenue: Net Income (Loss) Attributable to Parent [Abstract] Net revenue Revenue from Contract with Customer, Excluding Assessed Tax Cost of revenue: Cost of Revenue [Abstract] Cost of revenue Cost of Goods and Services Sold Amortization of developed technology Cost, Amortization Total cost of revenue Cost of Revenue Gross profit Gross Profit Operating expenses: Operating Expenses [Abstract] Marketing and sales Selling and Marketing Expense Research and development Research and Development Expense General and administrative General and Administrative Expense Amortization of purchased intangibles Amortization of Intangible Assets Restructuring and other exit costs, net Restructuring Charges, Net of Adjustments Restructuring Charges, Net of Adjustments Total operating expenses Operating Expenses Income (loss) from operations Operating Income (Loss) Interest and other expense, net Interest Income (Expense), Net Income (loss) before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Provision for income taxes Income Tax Expense (Benefit) Net income (loss) Basic net income (loss) per share (in dollars per share) Earnings Per Share, Basic Diluted net income (loss) per share (in dollars per share) Earnings Per Share, Diluted Weighted average shares used in computing basic net income (loss) per share (in shares) Weighted Average Number of Shares Outstanding, Basic Weighted average shares used in computing diluted net income (loss) per share (in shares) Weighted Average Number of Shares Outstanding, Diluted Business Nature of Operations [Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Segment Reporting Segment Reporting, Policy [Policy Text Block] Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Fair Value Measurement Fair Value Measurement, Policy [Policy Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Marketable Securities and Privately Held Company Investments Marketable Securities, Policy [Policy Text Block] Derivative Financial Instruments Derivatives, Policy [Policy Text Block] Foreign Currency Translation and Transactions Foreign Currency Transactions and Translations Policy [Policy Text Block] Accounts Receivable, Net Accounts Receivable [Policy Text Block] Concentration of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] [Policy Text Block] Concentration Risk, Credit Risk, Policy [Policy Text Block] Computer Equipment, Software, Furniture and Leasehold Improvements, Net Property, Plant and Equipment, Policy [Policy Text Block] Software Development Costs Research, Development, and Computer Software, Policy [Policy Text Block] Other Intangible Assets, Net Intangible Assets, Finite-Lived, Policy [Policy Text Block] Impairment of Long-Lived Assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Goodwill Goodwill and Intangible Assets, Policy [Policy Text Block] Deferred Tax Assets Income Tax, Policy [Policy Text Block] Stock-Based Compensation Expense Share-based Payment Arrangement [Policy Text Block] Advertising Expenses Advertising Cost [Policy Text Block] Net Income (Loss) Per Share Earnings Per Share, Policy [Policy Text Block] Defined Benefit Pension Plans Pension and Other Postretirement Plans, Pensions, Policy [Policy Text Block] Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] 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) Income tax expense Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Deferred income taxes, net Deferred Income Tax Assets, Net Other assets Other Assets Deferred revenue, current Deferred Revenue, Current Other accrued liabilities Other Accrued Liabilities Long-term deferred revenue Deferred Revenue, Noncurrent Long-term income taxes payable Accrued Income Taxes, Noncurrent Long-term deferred income taxes Deferred Income Tax Liabilities, Net Trade accounts receivable Accounts Receivable, before Allowance for Credit Loss Less: Allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss Product returns reserve Product Returns Reserve Product Returns Reserve Partner programs and other obligations Other Reserves Partner program incentives and other reserves. Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Net Unrealized (Losses) Gains on Derivative Instruments Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Net Unrealized Gains (Losses) on Available for Sale Securities AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] Defined Benefit Pension Components Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Foreign Currency Translation Adjustments Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Other comprehensive income (loss) before reclassifications OCI, before Reclassifications, before Tax, Attributable to Parent Pre-tax gains (losses) reclassified from accumulated other comprehensive income Reclassification from AOCI, Current Period, before Tax, Attributable to Parent Tax effects Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Base Rate Base Rate [Member] London Interbank Offered Rate (LIBOR) London Interbank Offered Rate (LIBOR) [Member] Debt Instrument, Covenant, Period [Axis] Debt Instrument, Covenant, Period [Axis] Debt Instrument, Covenant, Period [Axis] Debt Instrument, Covenant, Period [Domain] Debt Instrument, Covenant, Period [Domain] [Domain] for Debt Instrument, Covenant, Period [Axis] Fiscal quarter ending January 31, 2019 Debt Instrument, Covenant Period, Fiscal Quarter Ending January 31, 2019 [Member] Debt Instrument, Covenant Period, Fiscal Quarter Ending January 31, 2019 [Member] Fiscal quarter ending April 30, 2019 Debt Instrument, Covenant Period, Fiscal Quarter Ending April 30, 2019 [Member] Debt Instrument, Covenant Period, Fiscal Quarter Ending April 30, 2019 [Member] Fiscal quarter ending July 31, 2019 Debt Instrument, Covenant Period, Fiscal Quarter Ending July 31, 2019 [Member] Debt Instrument, Covenant Period, Fiscal Quarter Ending July 31, 2019 [Member] Fiscal quarter ending January 31, 2020 Debt Instrument, Covenant Period, Fiscal Quarter Ending January 31, 2020 [Member] Debt Instrument, Covenant Period, Fiscal Quarter Ending January 31, 2020 [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility Revolving Credit Facility [Member] Term Loan Term Loan [Member] Term Loan [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] 2.85 Notes due January 15 2030 2.85 Notes due January 15 2030 [Member] 2.85 Notes due January 15 2030 [Member] December 17, 2018 Credit Agreement December 17, 2018 Credit Agreement [Member] December 17, 2018 Credit Agreement [Member] 2017 Notes 3.5% Notes due June 15, 2027 [Member] 3.5% Notes due June 15, 2027 [Member] Senior Notes due 2017 Senior Notes due 2017 [Member] Senior Notes due 2017 [Member] Senior Notes due 2020 Senior Notes due 2020 [Member] Senior Notes due 2020 [Member] Senior Notes due 2025 Senior Notes due 2025 [Member] Senior Notes due 2025 [Member] 2015 Notes 2015 Senior Notes [Member] $450 2015 Senior Notes [Member] Senior Notes due 2022 Senior Notes due 2022 [Member] Senior Notes due 2022 [Member] 2012 Senior Notes 2012 Senior Notes [Member] 2012 Senior Notes [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Unamortized discount Debt Instrument, Unamortized Discount Debt issuance costs Debt Issuance Costs, Gross Proceeds from debt, net of issuance costs Proceeds from Debt, Net of Issuance Costs Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Line of credit facility, increase limit Line Of Credit Facility, Accordion Feature, Increase Limit Line Of Credit Facility, Accordion Feature, Increase Limit Debt covenant, interest coverage ratio, minimum Debt Instrument, Covenant, Interest Coverage Ratio, Minimum Debt Instrument, Covenant, Interest Coverage Ratio, Minimum Debt covenant, leverage ratio, maximum Debt Instrument, Covenant, Leverage Ratio, Maximum Debt Instrument, Covenant, Leverage Ratio, Maximum Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Interest rate (as a percentage) Line of Credit Facility, Interest Rate During Period Line of credit facility, outstanding borrowings Long-term Line of Credit Short-term debt, weighted average interest rate over time Short-term Debt, Weighted Average Interest Rate, over Time Debt redemption percentage of principle amount (as a percent) Debt Issuance Redemption Discount Premium Percentage Of Principal Amount Debt Issuance Redemption Discount Premium Percentage Of Principal Amount Fair value disclosure Debt Instrument, Fair Value Disclosure Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Cost of subscription and maintenance revenue Cost of Subscription and Maintenance Revenue [Member] Cost of Subscription and Maintenance Revenue [Member] Cost of other revenue adsk_CostofOtherRevenueMember [Member] adsk_CostofOtherRevenueMember [Member] Marketing and sales Selling and Marketing Expense [Member] Research and development Research and Development Expense [Member] General and administrative General and Administrative Expense [Member] Operating lease, cost Operating Lease, Cost Variable lease, cost Variable Lease, Cost Operating lease, payments Operating Lease, Payments Right-of-use asset obtained in exchange for operating lease liability Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Variable lease, payment Variable Lease, Payment Impairment of goodwill Goodwill, Impairment Loss Goodwill [Roll Forward] Goodwill [Roll Forward] Goodwill, beginning of period, gross Goodwill, Gross Less: accumulated impairment losses, beginning of the year Goodwill Accumulated Impairments Goodwill Accumulated Impairments Additions arising from acquisitions during the year Goodwill, Acquired During Period Effect of foreign currency translation and measurement period adjustments Goodwill, Translation and Purchase Accounting Adjustments Goodwill, end of period, net Goodwill Compensation Related Costs [Abstract] Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits, by Title of Individual and by Type of Deferred Compensation [Table] Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits, by Title of Individual and by Type of Deferred Compensation [Table] Fair Value, Assets and Liabilities Measured on a Recurring Basis Axis Fair Value, Assets and Liabilities Measured on a Recurring Basis [Axis] Fair Value, Assets and Liabilities Measured on a Recurring Basis Axis Fair Value Assets, by Type [Domain] Fair Value Assets, by Type [Domain] Fair Value Assets, by Type [Domain] Rabbi Trust Rabbi Trust Member Rabbi Trust Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] Marketable securities Marketable Securities Deferred compensation liability, current and non-current Deferred Compensation Liability, Current and Noncurrent Deferred compensation liability, current Deferred Compensation Liability, Current Deferred compensation liability, non-current Deferred Compensation Liability, Classified, Noncurrent Costs to obtain a contract Capitalized Contract Cost, Net Amortization of costs to obtain a contract Capitalized Contract Cost, Amortization Contract cost impairment loss Capitalized Contract Cost, Impairment Loss Total non cancellable purchase commitments Unrecorded Unconditional Purchase Obligation Royalty expense recorded under cost of license and other revenue Royalty Expense Deferred Compensation Compensation Related Costs, General [Text Block] Remaining lease term (in years) Lessee, Operating Lease, Remaining Lease Term Lessee, Operating Lease, Remaining Lease Term Lease renewal term (in years) Lessee, Operating Lease, Renewal Term Optional termination period (in years) Lessee Operating Lease Termination Period1 Lessee Operating Lease Termination Period1 Weighted average remaining lease term (in years) Operating Lease, Weighted Average Remaining Lease Term Weighted average discount rate (in percentage) Operating Lease, Weighted Average Discount Rate, Percent Operating lease minimum payments, executed leases that have not commenced adsk_LesseeOperatingLeaseLeaseNotyetCommencedUndiscountedAmount adsk_LesseeOperatingLeaseLeaseNotyetCommencedUndiscountedAmount Equity [Abstract] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Share Repurchase Program [Domain] Common Stock Repurchase Program Common Stock Repurchase Program [member] Common Stock Repurchase Program Class of Stock [Line Items] Class of Stock [Line Items] Repurchase and retirement of common shares (in shares) Average repurchase price per share (in dollars per share) Treasury Stock Acquired, Average Cost Per Share Common stock shares remained available for repurchase under repurchase plans (in shares) Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased Gross profit Income from operations (Provision) benefit for income taxes Basic net (loss) income per share (in dollars per share) Diluted net (loss) income per share (in dollars per share) (Loss) Income from operations includes the following items: income from operations includes following items [Abstract] income from operations includes following items [Abstract] Stock-based compensation expense Stock Based Compensation, Not Including Accelerated Compensation Expense Stock Based Compensation, Not Including Accelerated Compensation Expense Amortization of acquisition related intangibles Amortization of Acquired Intangible Assets1 Amortization of Acquired Intangible Assets1 CEO transition costs Chief Executive Officer Transition Costs Chief Executive Officer Transition Costs Acquisition related costs Business Combination, Acquisition Related Costs Restructuring and other exit costs, net Net (loss) gain on derivative instruments, tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax, Parent Net (loss) gain on derivative instruments, tax Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax, Portion Attributable to Parent Change in net unrealized gain (loss) on available-for-sale securities, tax Other Comprehensive Income (Loss), Available-for-sale Securities, Tax, Portion Attributable to Parent Change in defined pension items, tax Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax, Attributable to Parent Net change in cumulative foreign currency translation (loss) gain, tax Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax, Portion Attributable to Parent Schedule of New Accounting Pronouncements Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] ESPP Employee Stock [Member] Employee Qualified Stock Purchase Plan 1998 ESP Plan Issued shares (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Average price of issued shares (in dollars per share) Share Based Compensation Arrangement By Share Based Payment Award Shares Issued Average Price Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued, Average Price Weighted average grant date fair value of awards granted under the ESPP (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Borrowing Arrangements Debt Disclosure [Text Block] Number of revenue categories Number of Revenue Categories Number of Revenue Categories Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Fiscal 2019 Acquisitions Fiscal 2019 Acquisitions [Member] Fiscal 2019 Acquisitions [Member] Assemble Systems Inc Assemble Systems Inc [Member] Assemble Systems Inc [Member] PlanGrid PlanGrid [Member] PlanGrid [Member] BuildingConnected, Inc. BuildingConnected, Inc. [Member] BuildingConnected, Inc. [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Developed technologies Developed Technology Rights [Member] Customer relationships and other non-current intangible assets Customer Relationships And Other Noncurrent Intangible Assets [Member] Customer Relationships And Other Noncurrent Intangible Assets [Member] Trade name Trade Names [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Finite-lived intangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Goodwill Deferred revenue (current and non-current) Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Revenue Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Revenue Net tangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Excluding Intangible Assets And Deferrals Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Excluding Intangible Assets And Deferrals Total Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Goodwill, measurement period adjustment Goodwill, Purchase Accounting Adjustments Net tangible assets, measurement period adjustment Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Net Tangbile Assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Net Tangbile Assets Defined Contribution Plan [Table] Defined Contribution Plan [Table] Retirement Plan Type [Axis] Retirement Plan Type [Axis] Retirement Plan Type [Domain] Retirement Plan Type [Domain] Mandatory Retirement Savings, Cash Balance Plan Mandatory Retirement Savings, Cash Balance Plan [Member] Mandatory Retirement Savings, Cash Balance Plan [Member] Supplementary Retirement Savings, Cash Balance Plan Supplementary Retirement Savings, Cash Balance Plan [Member] Supplementary Retirement Savings, Cash Balance Plan [Member] Retirement Plan Sponsor Location [Axis] Retirement Plan Sponsor Location [Axis] Retirement Plan Sponsor Location [Domain] Retirement Plan Sponsor Location [Domain] Domestic Plan Domestic Plan [Member] United States Foreign Plan Foreign Plan [Member] Defined Contribution Plan Disclosure [Line Items] Defined Contribution Plan Disclosure [Line Items] Maximum annual contributions per employee Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Cost Recognized Defined Contribution Plan, Cost Projected benefit obligation of plan assets Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation Accumulated benefit obligation Defined Benefit Plan, Accumulated Benefit Obligation Fair value of plan assets Defined Benefit Plan, Plan Assets, Amount Other long-term liabilities Liability, Defined Benefit Plan Net periodic (benefit) cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Estimated future employer contributions in next fiscal year Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year Contributions paid by employer Defined Contribution Plan, Employer Discretionary Contribution Amount Weighted-average interest crediting rate Defined Benefit Plan, Weighted-Average Interest Crediting Rate Defined Benefit Plan, Weighted-Average Interest Crediting Rate Impairment of long-lived assets Impairment of Long-Lived Assets Held-for-use Compensation Related Costs Share Based Payments Disclosure [Table] Compensation Related Costs Share Based Payments Disclosure [Table] Compensation Related Costs Share Based Payments Disclosure [Table] Stock Options and Restricted Stock Stock Options and Restricted Stock [Member] Stock Options and Restricted Stock [Member] Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Stock Option Plans Share-based Payment Arrangement, Option [Member] Employee Stock Plan 2012 Employee Stock Plan 2012 [Member] Employee Stock Plan 2012 [Member] Directors stock plan 2012 Directors stock plan 2012 [Member] Directors stock plan 2012 [Member] 2012 Outside Directors' Plan Outside directors stock plan 2012 [Member] Outside directors stock plan 2012 [Member] PlanGrid 2012 Plan PlanGrid 2012 Plan [Member] PlanGrid 2012 Plan [Member] BuildingConnected 2012 Plan BuildingConnected 2012 Plan [Member] BuildingConnected 2012 Plan [Member] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] Year One Share-based Payment Arrangement, Tranche One [Member] Year Two Share-based Payment Arrangement, Tranche Two [Member] Year Three Share-based Payment Arrangement, Tranche Three [Member] Compensation Related Costs Share Based Payments Disclosure [Line Items] Compensation Related Costs Share Based Payments Disclosure [Line Items] Compensation Related Costs Share Based Payments Disclosure [Line Items] Number of active stock plans Number of Active Stock Plans Number of Active Stock Plans Number of additional share authorized (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Shares of common stock reserved for issuance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Restricted stock award, net of forfeitures (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Shares forfeited (in shares) Shares Issued, Shares, Share-based Payment Arrangement, Forfeited Shares granted to shares issued (in shares) Share-Based Compensation Shares Granted to Share Issued Share-Based Compensation Shares Granted to Share Issued Grants in period, net of forfeitures (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Share based payment award options expiration term (in years) Share Based Compensation Arrangement By Share Based Payment Award Options Expiration Term Share Based Compensation Arrangement By Share Based Payment Award Options Expiration Term Shares available for future issuance (in shares) Reduction of shares reserved for issuance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Reduction of Shares Authorized Share-based Compensation Arrangement by Share-based Payment Award, Reduction of Shares Authorized Options outstanding (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Non-vested stock options compensation cost not yet recognized Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount Total compensation cost related to non-vested awards not yet recognized, weighted average period of recognition (in years) Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Granted (in dollars per share) Fair value of units vested in period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Restricted stock granted (in shares) Liability classified awards, settled Share based compensation expense, restricted stock units Share-based Payment Arrangement, Amount Capitalized Total compensation cost related to non-vested awards not yet recognized Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Number of awards granted but unreleased Market capitalization level of peer group Market Capitalization Level of Peer Group Market Capitalization Level of Peer Group Vesting percentage (up to percentage) Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Percentage of compensation that eligible employees can use to purchase common stock, maximum Employee Stock Purchase Plan Maximum Percentage Of Compensation To Purchase Shares By Eligible Participants Employee Stock Purchase Plan, Maximum Percentage of Compensation to Purchase Shares By Eligible Participants Percentage of fair market value eligible employees can purchase common stock, minimum Employee Stock Purchase Plan Minimum Percentage Of Common Stock Fair Value Defined To Purchase Shares By Eligible Participants Employee Stock Purchase Plan, Minimum Percentage of Common Stock Fair Value Defined to Purchase Shares By Eligible Participants Number of exercise periods Employee Stock Purchase Plan, Number of Exercise Periods Employee Stock Purchase Plan, Number of Exercise Periods Term of exercise period Employee Stock Purchase Plan, Term of Exercise Period Employee Stock Purchase Plan, Term of Exercise Period Term of offering period Employee Stock Purchase Plan, Term of Offering Period Employee Stock Purchase Plan, Term of Offering Period Employee service share based compensation recognized compensation costs on nonvested restricted shares Employee Service Share Based Compensation recognized Compensation Costs On Nonvested Restricted Shares Employee Service Share Based Compensation recognized Compensation Costs On Nonvested Restricted Shares Cover page. Document Type Document Type Document Annual Report Document Annual Report Document Period End Date Document Period End Date Document Transition Report Document Transition Report Entity File Number Entity File Number Entity Registrant Name Entity Registrant Name Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line One Entity Address, City or Town Entity Address, City or Town Entity Address, State or Province Entity Address, State or Province Entity Address, Postal Zip Code Entity Address, Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Title of 12(b) Security Title of 12(b) Security Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name 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 Interactive Data Current Entity Interactive Data Current Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company Entity Public Float Entity Public Float Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Statement of Cash Flows [Abstract] Operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income (loss) to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation, amortization, and accretion Depreciation, Depletion and Amortization, Nonproduction Stock-based compensation expense Share-based Payment Arrangement, Noncash Expense Deferred income taxes Increase (Decrease) in Deferred Income Taxes Restructuring and other exit costs, net Restructuring And Other Exit Costs, Net Restructuring And Other Exit Costs, Net Other operating activities Other Operating Activities, Cash Flow Statement Changes in operating assets and liabilities, net of business combinations: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Accounts payable and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Deferred revenue Increase (Decrease) in Contract with Customer, Liability Accrued income taxes Increase (Decrease) in Income Taxes Payable Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Purchases of marketable securities Payments to Acquire Marketable Securities Sales of marketable securities Proceeds from Sale of Debt Securities, Available-for-sale Maturities of marketable securities Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Capital expenditures Payments for Capital Improvements Other investing activities Payments for (Proceeds from) Other Investing Activities Net cash (used in) provided by investing activities Net Cash Provided by (Used in) Investing Activities Financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from issuance of common stock Proceeds from Issuance of Common Stock Taxes paid related to net share settlement of equity awards Payment, Tax Withholding, Share-based Payment Arrangement Repurchase and retirement of common shares Payments for Repurchase of Common Stock Proceeds from debt, net of discount Proceeds from Issuance of Long-term Debt Repayments of debt Repayments of Lines of Credit Other financing activities Proceeds from (Payments for) Other Financing Activities Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash and Cash Equivalents Net increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents at beginning of fiscal year Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of fiscal year Supplemental cash flow information: Supplemental Cash Flow Information [Abstract] Cash paid during the year for interest Interest Paid, Excluding Capitalized Interest, Operating Activities Cash paid for income taxes, net of tax refunds Income Taxes Paid, Net Non-cash investing and financing activities: Noncash Investing and Financing Items [Abstract] Fair value of common stock issued to settle liability-classified restricted stock units Settlement Of Liability-Classified Restricted Stock Units Settlement Of Liability-Classified Restricted Stock Units Fair value of equity awards assumed Fair Value Of Equity Awards Assumed Fair Value Of Equity Awards Assumed Fair value of common stock issued as consideration for business combination Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Options outstanding (in shares) Granted (in shares) Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Canceled/Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Options outstanding (in shares) Weighted average exercise price per share Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Options outstanding, beginning balance (in dollars per share) Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Canceled/Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Options outstanding, ending balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Options vested and exercisable at January 31, 2020 (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Shares available for grant at January 31, 2020 (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Options vested and exercisable at January 31, 2020, Weighted average exercise price per share (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Options vested, exercisable and outstanding, Weighted average remaining contractual term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Options vested and exercisable at January 31, 2020, Weighted average remaining contractual term (in years) Share-based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Remaining Contractual Term Options vested, exercisable and outstanding at January 31, 2020, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Options vested and exercisable at January 31, 2020, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value Closing stock price (in dollars per share) Sale of Stock, Price Per Share Retirement Benefit Plans Pension and Other Postretirement Benefits Disclosure [Text Block] Earnings Per Share [Abstract] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Treasury Stock Treasury Stock [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Potentially dilutive shares excluded from the computation of diluted net income per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Table] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Designated as Hedging Instrument Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Derivative Instrument Risk [Axis] Derivative Instrument [Axis] Derivative Contract Type [Domain] Derivative Contract [Domain] Foreign Exchange Contracts Foreign Exchange Contract [Member] Subscription revenue Subscription Revenue [Member] Subscription Revenue [Member] Maintenance revenue Maintenance Revenue [Member] Maintenance Revenue [Member] General and administrative Net revenue Sales [Member] Cost of other revenue Cost of Sales [Member] Operating expenses Operating Expense [Member] Interest and other expense, net Interest and other income (expense), net [member] Interest Income (Expense), Net Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Total net revenue Amount of gain (loss) recognized in accumulated other comprehensive loss on derivatives (effective portion) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Amount of gain (loss) recognized in accumulated other comprehensive loss on derivatives (effective portion) Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax Amount of gain (loss) reclassified from accumulated other comprehensive income into income Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Amount and location of gain (loss) reclassified from accumulated other comprehensive loss into income (loss) (effective portion) Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Amount and location of gain (loss) recognized on derivatives in net income (loss) Derivative, Gain (Loss) on Derivative, Net Research and development General and administrative First $1M of officer compensation Effective Income Tax Rate Reconciliation, First $1M of Officer Compensation Effective Income Tax Rate Reconciliation, First $1M of Officer Compensation Income tax provision (benefit) at U.S. Federal statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount State income tax benefit, net of the U.S. Federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Foreign income taxed at rates different from the U.S. statutory rate including GILTI Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Transition tax and revisions due to subsequent regulations Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Transition Tax on Accumulated Foreign Earnings, Amount Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Transition Tax on Accumulated Foreign Earnings, Amount Tax effect of non-deductible stock-based compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount Stock compensation windfall / shortfall Effective Income Tax Rate Reconciliation, Stock Compensation Windfall Shortfall Effective Income Tax Rate Reconciliation, Stock Compensation Windfall Shortfall Research and development tax credit benefit Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount Closure of income tax audits and changes in uncertain tax positions Income Tax Reconciliation Uncertain Tax Positions The portion of the difference between total income tax expense (benefit) as reported in the Income Statement and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to closure of income tax audits and changes in uncertain tax positions. Tax effect of officer compensation in excess of $1.0 million Income Tax Reconciliation Officer Compensation Income Tax Reconciliation, Officer Compensation Non-deductible expenses Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount Other Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Quarterly Financial Information Quarterly Financial Information [Table Text Block] Long-lived Assets by Geographic Areas Long-lived Assets by Geographic Areas [Table Text Block] Schedule of Accounts, Notes, Loans and Financing Receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Property, Plant and Equipment Property, Plant and Equipment [Table Text Block] Schedule of Finite-Lived Intangible Assets by Major Class Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of Expected Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Schedule of Goodwill Schedule of Goodwill [Table Text Block] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Disclosure of Share-based Compensation Arrangements by Share-based Payment Award Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-sale [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Other Debt Obligations Other Debt Obligations [Member] Agency bonds US Government Agencies Debt Securities [Member] Certificates of Deposit Certificates of Deposit [Member] Commercial paper Commercial Paper [Member] Money market funds Money Market Funds [Member] Mutual funds Mutual Fund [Member] Corporate Debt Securities Corporate Debt Securities [Member] Deposits Deposits [Member] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Marketable Securities, Current Marketable Securities, Current [Member] Marketable Securities, Current [Member] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Cash equivalents: Cash and Cash Equivalents [Abstract] Amortized Cost Fair Value Cash and Cash Equivalents, Fair Value Disclosure Marketable securities: Marketable Securities [Abstract] Available-for-sale Debt Securities, Available-for-sale [Abstract] Amortized Cost Debt Securities, Available-for-sale, Amortized Cost Gross Unrealized Gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Fair Value Debt Securities, Available-for-sale Short-term trading securities Debt Securities, Trading and Available-for-sale [Abstract] Amortized Cost Debt Securities, Trading, Amortized Cost Debt Securities, Trading, Amortized Cost Gross Unrealized Gains Debt Securities, Trading, Accumulated Gross Unrealized Gain, before Tax Debt Securities, Trading, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Losses Debt Securities, Trading, Accumulated Gross Unrealized Loss, before Tax Debt Securities, Trading, Accumulated Gross Unrealized Loss, before Tax Fair Value Debt Securities, Trading Convertible debt securities, amortized cost Convertible Debt Securities, Amortized Cost Convertible Debt Securities, Amortized Cost Convertible debt securities, gross unrealized gains Convertible Debt Securities, Unrealized Gains Convertible Debt Securities, Unrealized Gains Convertible debt securities, gross unrealized losses Convertible Debt Securities, Unrealized Losses Convertible Debt Securities, Unrealized Losses Convertible debt securities, fair value Convertible Debt Securities, Fair Value Disclosure Convertible Debt Securities, Fair Value Disclosure Derivative contract assets, amortized cost Derivative Asset, Fair Value, Gross Asset Derivative contract assets, gross unrealized gains Derivative Assets, Accumulated Gross Unrealized Gain, before Tax Derivative Assets, Accumulated Gross Unrealized Gain, before Tax Derivative contract assets, gross unrealized losses Derivative Assets, Accumulated Gross Unrealized Loss, before Tax Derivative Assets, Accumulated Gross Unrealized Loss, before Tax Derivative contract assets, fair value Derivative Asset Derivative contract liabilities, amortized cost Derivative Liability, Fair Value, Gross Liability Derivative contract liabilities, gross unrealized gains Derivative Liabilities, Accumulated Gross Unrealized Gain, before Tax Derivative Liabilities, Accumulated Gross Unrealized Gain, before Tax Derivative contract liabilities, gross unrealized losses Derivative Liabilities, Accumulated Gross Unrealized Loss, before Tax Derivative Liabilities, Accumulated Gross Unrealized Loss, before Tax Derivative contract liabilities, fair value Derivative Liability Amortized cost Amortized Cost Securities Amortized Cost Securities Gross unrealized gains Investments, Accumulated Gross Unrealized Gain, before Tax Investments, Accumulated Gross Unrealized Gain, before Tax Gross unrealized losses Investments, Accumulated Gross Unrealized Loss, before Tax Investments, Accumulated Gross Unrealized Loss, before Tax Fair value Fair Value, Assets Measured on Recurring Basis Fair Value, Assets Measured on Recurring Basis Stock-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Research and development tax credit carryforwards Deferred Tax Assets, Tax Credit Carryforwards, Research Accrued compensation and benefits Deferred Tax Assets Accrued Compensation And Benefits Deferred Tax Assets, Accrued Compensation And Benefits Other accruals not currently deductible for tax Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Other Purchased technology and capitalized software Deferred Tax Assets Intangible Assets Deferred Tax Assets, Intangible Assets Fixed assets Deferred Tax Assets, Property, Plant and Equipment Lease liability Deferred Tax Assets, Lease Liabilities Deferred Tax Assets, Lease Liabilities Tax loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Deferred revenue Deferred Tax Assets, Deferred Income Other Deferred Tax Assets, Other Total deferred tax assets Deferred Tax Assets, Gross Less: valuation allowance Deferred Tax Assets, Valuation Allowance Net deferred tax assets Indefinite lived intangibles Deferred Tax Liabilities, Intangible Assets Right-of-use assets Deferred Tax Liability, Right of Use Assets Deferred Tax Liability, Right of Use Assets Unremitted earnings of foreign subsidiaries Deferred Tax Liabilities, Undistributed Foreign Earnings Total deferred tax liabilities Deferred Tax Liabilities, Gross Net deferred tax liabilities Deferred Tax Liabilities, Net Subscription Maintenance Other Other [Member] Other [Member] Cost of subscription and maintenance revenue Cost of revenue 2021 Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2022 Long-term Debt, Maturities, Repayments of Principal in Year Two 2023 Long-term Debt, Maturities, Repayments of Principal in Year Three 2024 Long-term Debt, Maturities, Repayments of Principal in Year Four 2025 Long-term Debt, Maturities, Repayments of Principal in Year Five Thereafter Long-term Debt, Maturities, Repayments of Principal after Year Five Total principal outstanding Long-term Debt Consideration transferred Business Combination, Consideration Transferred Payments to acquire businesses Payments to Acquire Businesses, Gross Consideration transferred, equity interests Consideration transferred, number of options (in shares) Business Combination, Consideration Transferred, Number Of Options Business Combination, Consideration Transferred, Number Of Options Consideration transferred, number of restricted stock units (in shares) Business Combination, Consideration Transferred, Number Of Equity Instruments Other Than Options Business Combination, Consideration Transferred, Number Of Equity Instruments Other Than Options Consideration Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination Stock issued (shares) Stock Issued During Period, Shares, New Issues Equity interest prior to acquisition Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value Ownership percentage prior to acquisition Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage Step acquisition remeasurement gain Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain Goodwill Business Acquisition, Goodwill, Expected Tax Deductible Amount Number of businesses acquired Number of Businesses Acquired Financial Instruments Financial Instruments Disclosure [Text Block] Schedule of Expected Benefit Payments Schedule of Expected Benefit Payments [Table Text Block] Stock Repurchase Program Stockholders' Equity Note Disclosure [Text Block] Business and Summary Of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Interest and Other Income, net Interest and Other Income [Table Text Block] Acquisitions Business Combination Disclosure [Text Block] Rent expense Operating Leases, Rent Expense Subsequent Events Subsequent Events [Text Block] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Customer Relationships, Trade Names, Patents, and User List Customer Relationships, Trade Names, Patents, and User List [Member] Customer Relationships, Trade Names, Patents, and User List [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Finite-lived intangible asset, useful life Finite-Lived Intangible Asset, Useful Life Finite-Lived Intangible Assets, Net [Abstract] Amortization of intangible assets Developed technologies, at cost Purchased technologies at cost Finite Lived Purchased Technologies Gross Customer relationships, trade names, patents, and user lists, at cost Other Finite-Lived Intangible Assets, Gross Other intangible assets, at cost Finite-Lived Intangible Assets, Gross Less: accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Other intangible assets, net Finite-Lived Intangible Assets, Net Weighted average useful life Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Total revenues Business Acquisition, Pro Forma Revenue Pretax loss Business Acquisition, Pro Forma Income (Loss), Before Tax Business Acquisition, Pro Forma Income (Loss), Before Tax Net loss Business Acquisition, Pro Forma Net Income (Loss) Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Architecture, Engineering and Construction Architecture Engineering And Construction [Member] Architecture, Engineering and Construction Manufacturing Manufacturing [Member] Manufacturing AutoCAD and AutoCAD LT AutoCAD and AutoCAD LT Family [Member] AutoCAD and AutoCAD LT Family [Member] Media and Entertainment Media And Entertainment [member] Media and Entertainment Americas Other Americas Europe, Middle East and Africa Asia Pacific Asia Pacific [Member] Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel [Domain] Contract with Customer, Sales Channel [Domain] Indirect Sales Channel, Through Intermediary [Member] Direct Sales Channel, Directly to Consumer [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Schedule of Share-based Compensation, Stock Options, Activity Share-based Payment Arrangement, Option, Activity [Table Text Block] Intrinsic Value of Options Exercised and Weighted Average Grant Date Fair Value of Stock Options Granted Intrinsic Value of Options Exercised and Weighted Average Grant Date Fair Value of Stock Options Granted [Table Text Block] Intrinsic Value of Options Exercised and Weighted Average Grant Date Fair Value of Stock Options Granted [Text Block] Restricted Share Activity Disclosure Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity [Table Text Block] Employee and Director Stock Options Outstanding Schedule Of Stock Options Granted [Table Text Block] Schedule Of Stock Options Granted [Table Text Block] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Designated as Hedging Instrument Derivatives, Fair Value, by Balance Sheet Location [Axis] Prepaid expenses and other current assets Prepaid Expenses and Other Current Assets [Member] Other accrued liabilities Other Accrued Liabilities [Member] Other Accrued Liabilities [Member] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Derivative, term of contract Derivative, Term of Contract Derivative, notional amount Derivative, Notional Amount Net gain expected to be recognized into earnings Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 24 Months Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 24 Months Derivative asset, net Derivative Asset, Fair Value, Amount Not Offset Against Collateral Derivative liability, net Derivative Liability, Fair Value, Amount Not Offset Against Collateral Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Cost of subscription and maintenance revenue Cost of Goods Sold, Subscription [Member] Cost of Goods Sold, Subscription [Member] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Stock-based compensation expense related to stock awards and Employee Qualified Stock Purchase Plan (ESPP) purchases Share-based Payment Arrangement, Expense Tax benefit Share-based Payment Arrangement, Expense, Tax Benefit Stock-based compensation expense related to stock awards and ESPP purchases, net Share-based Payment Arrangement, Expense, after Tax Cash dividends paid Payments of Dividends Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Leases Lessee, Operating Leases [Text Block] Schedule of Calculation of Numerator and Denominator in Net Loss Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Range of expected volatilities Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Range of expected lives Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected dividends Range of risk-free interest rates Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Numerator: Net Income (Loss), Including Portion Attributable to Noncontrolling Interest [Abstract] Denominator: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Denominator for basic net income (loss) per share—weighted average shares Effect of dilutive securities Weighted Average Number Diluted Shares Outstanding Adjustment Denominator for dilutive net income (loss) per share Antidilutive securities (in shares) Interest and investment expense, net Interest and Investments Expense, Net Interest and Investments Expense, Net Gain (loss) on foreign currency Foreign Currency Transaction Gain (Loss), before Tax (Loss) gain on strategic investments (Loss) Gain on Strategic Investments (Loss) Gain on Strategic Investments Other income Other Nonoperating Income (Expense) Interest and other expense, net Cost and Fair Value of Financial Instruments Disclosure Cost And Fair Value Of Financial Instruments [Table Text Block] Cost and Fair Value of Financial Instruments Disclosure [Table Text Block] Fair Value, Assets Measured on Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Location and amount of gain or (loss) recognized Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block] Schedule of Derivative Instruments in Statement of Financial Position, Fair Value Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance Derivative Instruments, Gain (Loss) [Table Text Block] Schedule of Accumulated Other Comprehensive (Loss) Income Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] 2021 Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year 2022 Lessee, Operating Lease, Liability, Payments, Due Year Two 2023 Lessee, Operating Lease, Liability, Payments, Due Year Three 2024 Lessee, Operating Lease, Liability, Payments, Due Year Four 2025 Lessee, Operating Lease, Liability, Payments, Due Year Five Thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Total lease payments Lessee, Operating Lease, Liability, Payments, Due Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Present value of operating lease liabilities Operating Lease, Liability Revenue Recognition Revenue from Contract with Customer [Text Block] Fair Value of Market Price Other Investments Not Readily Marketable [Table Text Block] Future Minimum Payments For Borrowings Schedule of Debt [Table Text Block] Income Taxes Income Tax Disclosure [Text Block] Employee and Director Stock Plans Share-based Payment Arrangement [Text Block] Remaining performance obligation Revenue, Remaining Performance Obligation, Amount Performance obligation, expected timing of satisfaction Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Remaining performance obligation percentage Revenue, Remaining Performance Obligation, Percentage Fair Value, Concentration of Risk [Table] Fair Value, Concentration of Risk [Table] Customer [Axis] Customer [Axis] Customer [Domain] Customer [Domain] Tech Data Tech Data [Member] Tech Data [Member] Ingram Micro Ingram Micro [Member] Ingram Micro [Domain] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Sales Revenue, Net Revenue Benchmark [Member] Accounts Receivable Accounts Receivable [Member] Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] Concentration risk, percentage Concentration Risk, Percentage ASSETS Current assets: Assets, Current [Abstract] Cash and cash equivalents Marketable securities Marketable Securities, Current Total current assets Computer equipment, software, furniture, and leasehold improvements, net Developed technologies, net Intangible Assets, Net (Excluding Goodwill) Other assets Other Assets, Noncurrent Total assets Accounts payable Accounts Payable, Current Accrued compensation Employee-related Liabilities, Current Accrued income taxes Accrued Income Taxes, Current Deferred revenue Contract with Customer, Liability, Current Current portion of long-term notes payable, net Notes Payable, Current Other accrued liabilities Total current liabilities Liabilities, Current Long-term deferred revenue Contract with Customer, Liability, Noncurrent Long-term operating lease liabilities Liabilities, Other than Long-term Debt, Noncurrent Long-term notes payable, net Notes Payable, Noncurrent Commitments and contingencies Commitments and Contingencies Stockholders’ deficit: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $0.01 par value; shares authorized 2.0; none issued or outstanding at January 31, 2020 and 2019 Preferred Stock, Value, Issued Common stock and additional paid-in capital, $0.01 par value; shares authorized 750.0; 219.4 outstanding at January 31, 2020 and 2019 Common Stocks, Including Additional Paid in Capital Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Total stockholders’ deficit Total liabilities and stockholders' deficit Liabilities and Equity Provision for income taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Differences between the U.S. statutory rate and the aggregate income tax provision Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Components of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Unrecognized Tax Benefits Reconciliation Unrecognized Tax Benefits Reconciliation, Table [Table Text Block] Unrecognized Tax Benefits Reconciliation, Table [Text Block] Net Income (Loss) Per Share Earnings Per Share [Text Block]