Business Combinations [Abstract] 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 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 Retirement Benefits [Abstract] Plans with accumulated benefit obligations in excess of plan assets: Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract] Accumulated benefit obligations Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation Plan assets Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Plan Assets Plans with projected benefit obligations in excess of plan assets: Defined Benefit Plan, Pension Plan with Project Benefit Obligation in Excess of Plan Assets [Abstract] Projected benefit obligations Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation Plan assets Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets Quarterly Financial Information Disclosure [Abstract] Quarterly Financial Information Quarterly Financial Information [Table Text Block] 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 Other than temporary impairment losses, investments Other than Temporary Impairment Losses, Investments Income Tax Disclosure [Abstract] 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] Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] 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] Statement [Line Items] Statement [Line Items] 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) Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Common shares issued under stock plans Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Stock-based compensation expense Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Tax benefits from employee stock plans Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation 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 accounting changes Cumulative Effect of Accounting Change Cumulative Effect of Accounting Change Net 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 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] Revenue from Contract with Customer [Abstract] Revenue Recognition Revenue from Contract with Customer [Text Block] Accounting Policies [Abstract] 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 Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [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] Schedule of New Accounting Pronouncements Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Disclosure of Compensation Related Costs, Share-based Payments [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] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [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 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] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Mutual funds Mutual Fund [Member] 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 Debt securities, trading Debt Securities, Trading 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 ESPP Employee Stock [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Employee Qualified Stock Purchase Plan 1998 ESP Plan Employee Qualified Stock Purchase Plan 1998 ESP Plan [Member] Employee Qualified Stock Purchase Plan 1998 ESP Plan [Member] 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 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) Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Marketable securities Marketable Securities, Current Accounts receivable, net Accounts Receivable, Net, Current Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Marketable securities Marketable Securities, Noncurrent Computer equipment, software, furniture, and leasehold improvements, net Property, Plant and Equipment, Net Developed technologies, net Intangible Assets, Net (Excluding Goodwill) Deferred income taxes, net Deferred Income Tax Assets, Net Other assets Other Assets, Noncurrent Total assets Assets LIABILITIES AND STOCKHOLDERS’ DEFICIT Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] 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 Other accrued liabilities Other Accrued Liabilities, Current Total current liabilities Liabilities, Current Long-term deferred revenue Contract with Customer, Liability, Noncurrent Long-term income taxes payable Accrued Income Taxes, Noncurrent Long-term deferred income taxes Deferred Income Tax Liabilities, Net Long-term notes payable, net Long-term Debt Long-term other liabilities Other Liabilities, 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, 2019 and 2018 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, 2019 and 218.3 outstanding at January 31, 2018 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’ deficit Total liabilities and stockholders' deficit Liabilities and Equity Selected Quarterly Financial Information (Unaudited) Quarterly Financial Information [Text Block] Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Term Loan Term Loan [Member] Term Loan [Member] Consideration transferred Business Combination, Consideration Transferred Payments to acquire businesses Payments to Acquire Businesses, Gross Consideration transferred, equity interests Business Combination, Consideration Transferred, Equity Interests Issued and Issuable 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 Face amount Debt Instrument, Face Amount 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 Earnings Per Share [Abstract] Schedule of Calculation of Numerator and Denominator in Net Loss Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Beginning projected benefit obligation Defined Benefit Plan, Benefit Obligation Service cost Defined Benefit Plan, Service Cost Interest cost Defined Benefit Plan, Interest Cost Actuarial (gain) loss Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) Benefits paid Defined Benefit Plan, Benefit Obligation, Benefits Paid Foreign currency exchange rate changes Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss) Curtailments and settlements Defined Benefit Plan, Curtailments and Settlements, Benefit Obligation Defined Benefit Plan, Curtailments and Settlements, Benefit Obligation Contributions by plan participants Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant Plan amendment Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment Ending projected benefit obligation Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Beginning fair value of plan assets Defined Benefit Plan, Plan Assets, Amount Actual return on plan assets Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) Contributions paid by employer Defined Benefit Plan, Plan Assets, Contributions by Employer Contributions paid by plan participants Defined Benefit Plan, Plan Assets, Contributions by Plan Participant Benefit payments Defined Benefit Plan, Plan Assets, Benefits Paid Curtailments and settlements Defined Benefit Plan, Curtailments and Settlements, Plan Assets Defined Benefit Plan, Curtailments and Settlements, Plan Assets Foreign currency exchange rate changes Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss) Ending fair value of plan assets Funded status Defined Benefit Plan, Funded (Unfunded) Status of Plan Advertising Expense Advertising Expense Numerator: Net Income (Loss), Including Portion Attributable to Noncontrolling Interest [Abstract] Denominator: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Denominator for basic net loss per share—weighted average shares Weighted Average Number of Shares Outstanding, Basic Effect of dilutive securities Weighted Average Number Diluted Shares Outstanding Adjustment Denominator for dilutive net loss per share Weighted Average Number of Shares Outstanding, Diluted Basic net loss per share (in dollars per share) Earnings Per Share, Basic Diluted net loss per share (in dollars per share) Earnings Per Share, Diluted Antidilutive securities (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 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 Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount U.S. valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Transition tax 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 Increase in attributes due to ASU 2016-9 adoption Effective Income Tax Rate Reconciliation, Increase in Attributes Due to Adoption of Accounting Pronouncement Effective Income Tax Rate Reconciliation, Increase in Attributes Due to Adoption of Accounting Pronouncement Change in valuation allowance from ASU 2016-9 adoption Effective Income Tax Rate Reconciliation, Change in Valuation Allowance due to Adoption of Accounting Pronouncement Effective Income Tax Rate Reconciliation, Change in Valuation Allowance due to Adoption of Accounting Pronouncement Tax effect of non-deductible stock-based compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, 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 Income tax expense Income Tax Expense (Benefit) Statement of Comprehensive Income [Abstract] Net gain (loss) on derivative instruments, tax Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax, Portion Attributable to Parent Change in net unrealized (loss) gain 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 Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring Fair Value, Measurements, Recurring [Member] Defined Benefit Plan, Plan Assets, Category [Axis] Defined Benefit Plan, Plan Assets, Category [Axis] Defined Benefit Plan, Plan Assets, Category [Domain] Defined Benefit Plan, Plan Assets, Category [Domain] Insurance contracts Insurance Contracts [Member] Insurance Contracts [Member] Other investments Other Investments [Member] Cash Defined Benefit Plan, Cash [Member] Investment Fund Investment Fund [Member] Investment Fund [Member] 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 1, 2 and 3 Fair Value, Inputs, Level 1, 2 and 3 [Member] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Net Asset Value Fair Value Measured at Net Asset Value Per Share [Member] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Fair value of plan assets Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-sale [Table] Agency bonds US Government Agencies Debt Securities [Member] Certificates of deposit Certificates of Deposit [Member] Commercial paper Commercial Paper [Member] Corporate debt securities Corporate Debt Securities [Member] Custody cash deposit Deposits [Member] Money market funds Money Market Funds [Member] Municipal bonds Municipal Bonds [Member] Sovereign debt Sovereign Debt [Member] U.S. government securities US Treasury Securities [Member] Asset backed securities Asset-backed Securities [Member] Other Other Securities [Member] Other Securities [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] Marketable Securities, Noncurrent Marketable Securities, Noncurrent [Member] Marketable Securities, Noncurrent [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 Trading Securities, Accumulated Gross Unrealized Gain, before Tax Trading Securities, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Losses Trading Securities, Accumulated Gross Unrealized Loss, before Tax Trading Securities, Accumulated Gross Unrealized Loss, before Tax Fair Value 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 Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity 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] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Sales Revenue, Net Sales Revenue, Net [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 Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Other long-term liabilities Liability, Defined Benefit Plan Accumulated other comprehensive loss, before tax Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax Net amount recognized Defined Benefit Plan, Liabilities and Accumulated Other Comprehensive Income Defined Benefit Plan, Liabilities and Accumulated Other Comprehensive Income Net prior service credit Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax Net actuarial loss Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax Accumulated other comprehensive loss, before tax Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Net Unrealized Gains (Losses) on Derivative Instruments Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Net Unrealized Gains (Losses) on Available for Sale Securities Accumulated Net Investment Gain (Loss) Attributable to 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 losses (gains) 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 Total other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent 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 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 Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] 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 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 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 Restructuring and other exit costs, net Restructuring Charges, Net of Adjustments Restructuring Charges, Net of Adjustments Total operating expenses Operating Expenses Loss from operations Operating Income (Loss) Interest and other expense, net Interest Income (Expense), Net Loss before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Provision for income taxes Net loss Weighted average shares used in computing basic net loss per share (in shares) Weighted average shares used in computing diluted net loss per share (in shares) Schedule of Share-based Compensation, Stock Options, Activity Share-based Compensation, Stock Options, 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] Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] Restricted Share Activity Disclosure Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units 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] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Architecture, Engineering and Construction Architecture Engineering And Construction [Member] Architecture, Engineering and Construction AutoCAD and AutoCAD LT AutoCAD and AutoCAD LT Family [Member] AutoCAD and AutoCAD LT Family [Member] Manufacturing Manufacturing [Member] Manufacturing Media and Entertainment Media And Entertainment [member] Media and Entertainment Other Other [Member] Other [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Americas Americas [Member] U.S. UNITED STATES Other Americas Other Americas [Member] Other Americas Europe, Middle East and Africa EMEA [Member] 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] Net revenue Contract with customer, liability, revenue recognized Contract with Customer, Liability, Revenue Recognized Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent [Abstract] Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent [Abstract] Prior service credit for period Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax Net (gain) loss for period Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax Effect 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(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 Payments Related to Tax Withholding for Share-based Compensation 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 provided by (used in) 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 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 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 equity awards assumed (See Note 6) Fair Value Of Equity Awards Assumed Fair Value Of Equity Awards Assumed Fair value of common stock issued as consideration for business combination (See Note 6) Accumulated Other Comprehensive Loss Comprehensive Income (Loss) Note [Text Block] Business and Summary Of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Aggregate Future Minimum Lease Payments Lessee, Operating Lease, Disclosure [Table Text Block] Rent Expense Related to Operating Leases Schedule of Rent Expense [Table Text Block] 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shares) Share-based Compensation Arrangement By Share-based Payment Award, Options, Acquired In Period Share-based Compensation Arrangement By Share-based Payment Award, Options, Acquired In Period Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures 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) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Assumed from acquisitions (in dollars per share) Share-based Compensation Arrangements By Share-based Payment Award, Options, Acquired In Period, Weighted Average Exercise Price Share-based Compensation Arrangements By Share-based Payment Award, Options, Acquired In Period, Weighted Average Exercise Price 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, exercisable and outstanding at January 31, 2019, Number of Shares (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Options vested and exercisable as of January 31, 2019 and expected to vest thereafter, Number of Shares (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Shares available for grant at January 31, 2019 (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Options vested and exercisable at January 31, 2019, 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 and exercisable at January 31, 2019 and expected to vest thereafter, Weighted average exercise price per share (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, 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, 2019, Weighted average remaining contractual term (in years) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Remaining Contractual Term Options vested and exercisable as of January 31, 2019 and expected to vest thereafter, Weighted average remaining contractual term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Options vested, exercisable and outstanding at January 31, 2019, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Options vested and exercisable at January 31, 2019, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value Options vested and exercisable as of January 31, 2019 and expected to vest thereafter, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Closing stock price (in usd per share) Sale of Stock, Price Per Share SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] Financial Statement Schedule II SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Schedule of Employee Service Share-based 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Compensation Expense Tax benefit Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Stock-based compensation expense related to stock awards and ESPP purchases, net Allocated Share-based Compensation Expense, Net of Tax Market capitalization level of peer group Market Capitalization Level of Peer Group Market Capitalization Level of Peer Group 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 Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Other Income and Expenses [Abstract] Interest and Other Income, net Interest and Other 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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 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 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 Restructuring and Related Activities [Abstract] Restructuring and other exit costs, net Restructuring and Related Activities Disclosure [Text Block] Service cost for benefits earned during the period Interest cost on projected benefit obligation Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Amortization of prior service credit Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Amortization of loss Defined Benefit Plan, Amortization of Gain (Loss) Settlement loss Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement Curtailment gain Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment Net periodic (benefit) cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Acquisitions Business Combination Disclosure [Text Block] Segment Reporting [Abstract] Segments Segment Reporting Disclosure [Text Block] Gross profit (Loss) income from operations Net (loss) income 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 Schedule of Accumulated Other Comprehensive (Loss) Income Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Number of segment managers Number of Segment Managers Number of Segment Managers Number of operating segments Number of Operating Segments Financial Instruments Financial Instruments Disclosure [Text Block] Stockholders' (Deficit) Equity Stockholders' Equity Note Disclosure [Text Block] 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 Foreign tax credit carryforwards Deferred Tax Assets, Tax Credit Carryforwards, Foreign 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 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 Deferred Tax Assets, Net of Valuation Allowance Indefinite lived intangibles Deferred Tax Liabilities, Other Total deferred tax liabilities Deferred Tax Liabilities, Gross Net deferred tax liabilities Deferred Tax Liabilities, Net Net deferred tax assets Deferred Tax Assets, Net New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Domain] Initial Application Period Cumulative Effect Transition [Domain] Impact from the adoption of ASC 606 and 340-40 Difference between Revenue Guidance in Effect before and after Topic 606 [Member] As Adjusted Calculated under Revenue Guidance in Effect before Topic 606 [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2014-09 Accounting Standards Update 2014-09 [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] ASSETS Prepaid expenses and other current assets Deferred revenue Other accrued liabilities Long-term deferred revenue Long-term deferred income taxes Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Discount rate Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Rate of compensation increase Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase 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 Gain (loss) on strategic investments (Loss) Gain on Strategic Investments (Loss) Gain on Strategic Investments Other income Other Nonoperating Income (Expense) Interest and other expense, net Equity Compensation Plans Approved by Security Holders Equity Compensation Plans Approved By Security Holders [Member] Equity Compensation Plans 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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] United States Foreign Plan Foreign Plan [Member] Defined Contribution Plan Disclosure [Line Items] Defined Contribution Plan Disclosure [Line Items] Funded percentage Defined Benefit Plan, Funded Percentage Accumulated benefit obligation Defined Benefit Plan, Accumulated Benefit Obligation Actual plan asset allocations Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage Estimated future employer contributions in next fiscal year Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year Expected long-term rate of return on plan assets Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets Maximum annual contributions per employee Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Cost Recognized Defined Contribution Plan, Cost 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 Defined Benefit Plan, Expected Future Benefit Payment [Abstract] Defined Benefit Plan, Expected Future Benefit Payment [Abstract] 2020 Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months 2021 Defined Benefit Plan, Expected Future Benefit Payment, Year Two 2022 Defined Benefit Plan, Expected Future Benefit Payment, Year Three 2023 Defined Benefit Plan, Expected Future Benefit Payment, Year Four 2024 Defined Benefit Plan, Expected Future Benefit Payment, Year Five 2025-2029 Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter Total Defined Benefit Plan, Expected Future Benefit Payment, Remainder of Fiscal Year 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] 2019 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Four 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 Net Loss Per Share Earnings Per Share [Text Block] 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] Derivative Instruments, Gain (Loss) by Income Statement Location [Axis] Income Statement and Other Comprehensive Income (Loss) Location [Domain] Net revenue 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] 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 and location of (loss) gain reclassified from accumulated other comprehensive loss into (loss) income (effective portion) Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Amount and location of gain (loss) recognized in income (loss) on derivatives (ineffective portion and amount excluded from effectiveness testing) Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net Amount and location of loss recognized in loss (income) on derivatives Derivative, Gain (Loss) on Derivative, Net 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] 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, 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