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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 Total other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent 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] 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 Useful Life Property, Plant and Equipment, Useful Life Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax, Portion Attributable to Parent [Abstract] Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax, Portion Attributable to Parent [Abstract] Prior service credit for period Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit) Arising During Period, before Tax Net loss (gain) for period Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax Amortization of prior service credit Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), before Tax Amortization of net loss Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax Other comprehensive loss (income) Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax, Portion Attributable to Parent Business and Summary Of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Statement of Comprehensive Income [Abstract] Other comprehensive (loss) income, net of reclassifications: Other Comprehensive Income (Loss), Net of Tax [Abstract] Net (loss) gain on derivative instruments (net of tax effect of $0.6, ($0.7), and $1.1) Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent Change in net unrealized loss on available-for-sale securities (net of tax effect of $0.0, ($0.2), and $0.3) Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax Net change in cumulative foreign currency translation (loss) gain (net of tax effect of $0.5, $4.9, and$2.1) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Total comprehensive (loss) income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Performance Stock Unit Performance Stock Unit [Member] Performance Stock Unit (1) [Member] Employee Qualified Stock Purchase Plan 1998 ESP Plan Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items] Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items] Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items] 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 Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Range of risk-free interest rates Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 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 unfunded portion of pension plans, tax Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax, Portion Attributable to Parent Net change in cumulative foreign currency translation gain (loss), tax Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax, Portion Attributable to Parent Interest and investment expense, net Interest and Investments Expense, Net Interest and Investments Expense, Net (Loss) gain on foreign currency Foreign Currency Transaction Gain (Loss), before Tax Gain (loss) on strategic 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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Range of per-share exercise prices, Lower Limit ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerLimit Share Based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Limit Range of per-share exercise prices, Upper Limit ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperLimit Share Based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Limit Options Vested and Exercisable, Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Options Vested and Exercisable, Weighted average exercise price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Schedule of Accumulated Other Comprehensive (Loss) Income Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract] Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract] 2017 Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months 2018 Defined Benefit Plan, Expected Future Benefit Payments, Year Two 2019 Defined Benefit Plan, Expected Future Benefit Payments, Year Three 2020 Defined Benefit Plan, Expected Future Benefit Payments, Year Four 2021 Defined Benefit Plan, Expected Future Benefit Payments, Year Five 2022-2026 Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter 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 Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Schedule of Calculation of Numerator and Denominator in Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Options outstanding (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 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) Options exercisable (in shares) Options available for grant (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Weighted average price per share Share-based Compensation Arrangement by Share-based Payment Award, Options, Weighted Average Exercise Price [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Weighted Average Exercise Price [Roll Forward] Options outstanding (per share) Granted (per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Exercised (per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price 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Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax Statement of Cash Flows [Abstract] Operating Activities Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net (loss) income 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 Deferred income taxes Increase (Decrease) in Deferred Income Taxes Excess tax benefits from stock-based compensation Excess Tax Benefit from Share-based Compensation, Operating Activities Restructuring charges, 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 Deferred Revenue 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 Available-for-sale Securities Maturities of marketable securities Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities Acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Capital expenditures Payments for Capital Improvements Other investing activities Payments to Acquire Investments Net cash used in 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 Excess tax benefits from stock-based compensation Excess Tax Benefit from Share-based Compensation, Financing Activities 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) increase 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 Net cash paid during the year for income taxes Income Taxes Paid, Net Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Unallocated Segment Reconciling Items [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Depreciation and Amortization Depreciation, Depletion and Amortization Cost Cost [Abstract] Cost [Abstract] Due in 1 year Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis Due in 1 year through 5 years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis Due in 5 years through 10 years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis Total Available-for-sale Debt Securities, Amortized Cost Basis Fair Value Fair Value Disclosures [Abstract] Due in 1 year Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Due in 1 year through 5 years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value Due in 5 years through 10 years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value Total Available-for-sale Securities, Debt Securities Derivative, term of contract Derivative, Term of Contract 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 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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested Share Based Compensation Arrangement by Share based Payment Award, Equity Instruments Other than Options, Released in Period The decrease in the number of shares potentially issuable under a share-based award plan pertaining to awards for which the grantee has gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares, other instruments, or cash in accordance with the terms of the arrangement. Canceled/Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Performance adjustment 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 units at January 31, 2016 Weighted average grant date fair value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Weighted Average Exercise Price [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Weighted Average Exercise Price [Roll Forward] Unvested restricted stock units at January 31, 2015 Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Vested 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 Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Performance adjustment 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 units at January 31, 2016 Equity instruments other than options, percent of target Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Performance Shares Target Percentage Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Performance Shares Target Percentage 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) income per share—weighted average shares Weighted Average Number of Shares Outstanding, Basic Effect of dilutive securities (1) Weighted Average Number Diluted Shares Outstanding Adjustment Denominator for dilutive net (loss) income per share Weighted Average Number of Shares Outstanding, Diluted Basic net (loss) income per share (usd per share) Schedule of Reclassification Amount Schedule of Revenue Reclassifications [Table Text Block] Schedule of Revenue Reclassifications [Table 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Current portion, ending balance Non-current portion, ending balance Total Accumulated Other Comprehensive Loss Comprehensive Income (Loss) Note [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 assets Other Accrued Liabilities Other Accrued Liabilities [Member] Other Accrued Liabilities [Member] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Notional amount of foreign currency forward contracts not designated as cash flow hedges Derivative, Notional Amount Net loss expected to be recognized into earnings Derivative asset, net Derivative Asset, Fair Value, Amount Not Offset Against Collateral Derivative liability, net Derivative Liability, Fair Value, Amount Not Offset Against Collateral Derivative asset, gross Derivative Asset, Fair Value, Gross Asset Derivative liability, gross Derivative Liability, Fair Value, Gross Liability 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 Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Other Series of Individually Immaterial Business Acquisitions [Member] Within Technologies Limited Acquired 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 Customer Relationships [Member] Trade name Trade Names [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Goodwill Deferred Revenue Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue Deferred tax (liability) asset Deferred Tax Liability Business Acquisition, Purchase Price Allocation, Deferred Income Tax Liabilities Net tangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible, Net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible, Net Total Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Income Statement [Abstract] Net revenue: Revenue, Net [Abstract] License and other License and Services Revenue Subscription Maintenance Revenue Total net revenue Cost of revenue: Cost of Revenue [Abstract] Cost of license and other revenue License Costs Cost of subscription revenue Maintenance Costs Total cost of revenue Cost of Revenue 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 Total operating expenses Income from operations Interest and other expense, net (Loss) income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Net (loss) income Weighted average shares used in computing basic net (loss) income per share Weighted average shares used in computing diluted net (loss) income per share Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves [Domain] Valuation Allowances and Reserves [Domain] Allowance for doubtful accounts Allowance for Doubtful Accounts [Member] Product returns reserves Allowance for Sales Returns [Member] Partner Program reserves Partner Program Reserves [Member] Partner Program Reserves [Member] Restructuring Business Restructuring Reserves [Member] Movement in Valuation Allowances and Reserves [Roll Forward] Movement in Valuation Allowances and Reserves [Roll Forward] Balance at the Beginning of Year Valuation Allowances and Reserves, Balance Valuation Allowances and Reserves, Charged to Cost and Expense Valuation Allowances and Reserves, Charged to Cost and Expense Deductions and Write-Offs Valuation Allowances and Reserves, Deductions Balance at End of Year Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Income Statement Location [Axis] Income Statement Location [Domain] Cost of license and other revenue Cost of Sales [Member] Cost of subscription Cost of Goods Sold, Subscription [Member] Cost of Goods Sold, Subscription [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] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Stock-based compensation expense related to stock awards and ESP Plan purchases Allocated Share-based Compensation Expense Tax benefit Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Stock-based compensation expense related to stock awards and ESP Plan purchases, net Allocated Share-based Compensation Expense, Net of Tax New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Long-term Debt [Member] Long-term Debt [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification Funded percentage Defined Benefit Plan, Funded Percentage Accumulated benefit obligation Defined Benefit Plan, Accumulated Benefit Obligation Actual plan asset allocations Defined Benefit Plan, Actual Plan Asset Allocations Estimated future employer contributions in next fiscal year Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year Defined Contribution Plan [Table] Defined Contribution Plan [Table] Defined Contribution Plan Type [Axis] Defined Contribution Plan 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[Member] Directors stock plan 2012 [Member] Directors stock plan 2012 [Member] Directors stock plan 2012 [Member] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] Year One Share-based Compensation Award, Tranche One [Member] Year Two Share-based Compensation Award, Tranche Two [Member] Year Three Share-based Compensation Award, 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 Expired Plans Number of Expired Plans Number of Expired 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) Stock Issued During Period, Shares, Share-based Compensation, 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) 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) Granted (in dollars per share) Fair value of units vested in period Share-based Compensation Arrangement by 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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 Shares available for future issuance, increases on the first trading day of each fiscal year (In shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Other Increases (Decreases) in Period Shares available for future issuance, percentage of outstanding shares plus any shares repurchased by Autodesk (as a percent) 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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 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 Net deferred tax assets Deferred Tax Assets, Net Employee and Director Stock Plans Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Acquisitions Business Combination Disclosure [Text Block] 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] 2017 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2018 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2021 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 Taxes Income Tax Disclosure [Text Block] Defined 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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 Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Series of Individually Immaterial Business Acquisitions Payments to acquire business Payments to Acquire Businesses, Gross Goodwill, expected tax deductible amount Business Acquisition, Goodwill, Expected Tax Deductible Amount Fair value of original convertible debt investment Fair Value of Original Convertible Debt Investment Fair Value of Original Convertible Debt Investment Goodwill Number of Businesses Acquired Number of Businesses Acquired Segments Segment Reporting Disclosure [Text Block] Interest and Other Expense, net Other Income and Other Expense Disclosure [Text Block] Americas Americas [Member] Europe Middle East And Africa [Member] Europe Middle East And Africa [Member] Europe, Middle East and Africa Europe, Middle East, and Africa Asia Pacific Region Reporting Information, by Secondary Region [Axis] Region Reporting Information, by Secondary Region [Axis] Region Reporting Information, by Secondary Region [Axis] Region Reporting Information, by Secondary Region [Domain] Region Reporting Information, by Secondary Region [Domain] Region Reporting Information, by Secondary Region [Domain] U.S. Japan JAPAN Other Asia Pacific Other Asia Pacific [Member] Other Asia Pacific Total long-lived assets Long-Lived Assets 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 ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Marketable securities Marketable Securities, Current Accounts receivable, net Accounts Receivable, Net, Current Deferred income taxes, net Deferred Tax Assets, Net of Valuation Allowance, 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 Developed technologies, net Intangible Assets, Net (Excluding Goodwill) Deferred income taxes, net Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Other assets Other Assets, Noncurrent Total assets Assets LIABILITIES AND STOCKHOLDERS’ EQUITY 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 Deferred Revenue, Current Other accrued liabilities Other Accrued Liabilities, Current Total current liabilities Liabilities, Current Deferred revenue Deferred Revenue, Noncurrent Long term income taxes payable Accrued Income Taxes, Noncurrent Long term deferred income taxes Deferred Tax Liabilities, Net, Noncurrent Long term notes payable, net Long-term Debt Other liabilities Other Liabilities, Noncurrent Commitments and contingencies Commitments and Contingencies Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $0.01 par value; shares authorized 2.0; none issued or outstanding at January 31, 2016 and 2015 Preferred Stock, Value, Issued Common stock and additional paid-in capital, $0.01 par value; shares authorized 750.0; 224.4 outstanding at January 31, 2016 and 227.0 outstanding at January 31, 2015 Common Stocks, Including Additional Paid in Capital Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Retained earnings Retained Earnings (Accumulated Deficit) Total stockholders’ equity Total liabilities and stockholders' equity Liabilities and Equity Net (Loss) Income Per Share Earnings Per Share [Text Block] 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] State and Local Jurisdiction and the Internal Revenue Service State and Local Jurisdiction and the Internal Revenue Service [Member] State and Local Jurisdiction and the Internal Revenue Service [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] Geographical [Axis] Canada CANADA Income Taxes [Line Items] Income Taxes [Line Items] Income Taxes [Line Items] 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