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 Deferred income taxes Deferred Tax Assets, 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 Purchased technologies, net Intangible Assets, Net (Excluding Goodwill) Goodwill Goodwill Deferred income taxes, net Deferred Tax Assets, Net, Noncurrent Other assets Other Assets, Noncurrent Assets, Total 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 Other liabilities Other Liabilities, Noncurrent Commitments and contingencies Commitments and Contingencies Stockholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock Preferred Stock, Value, Issued Common stock and additional paid-in capital Common Stock, Including Additional Paid in Capital Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Retained earnings Retained Earnings (Accumulated Deficit) Total stockholders' equity Stockholders' Equity Attributable to Parent Liabilities and Equity, Total Liabilities and Equity Disclosure - Contractual Maturities of Tpyes of Securities [Abstract] Disclosure - Contractual Maturities of Tpyes of Securities [Abstract] Cost [Abstract] Cost [Abstract] Cost [Abstract] Due in 1 year Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis Due in 1 year through 5 years Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis Due in 5 year through 10 years Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis Due after 10 years Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis Total Available-for-sale Securities, Debt Maturities, Amortized Cost Basis Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Due in 1 year Available-for-sale Securities, Debt Maturities, within One Year, Fair Value Due in 1 year through 5 years Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value Due in 5 year through 10 years Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value Due after 10 years Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value Total Available-for-sale Securities, Debt Securities Notes to Financial Statements [Abstract] Notes to Financial Statements [Abstract] Schedule of Goodwill Schedule of Goodwill [Table Text Block] Disclosure - Stock-Based Compensation Expense - Additional Information [Abstract] Disclosure - Stock-Based Compensation Expense - Additional Information [Abstract] Compensation Related Costs Share Based Payments Disclosure [Table] Compensation Related Costs Share Based Payments Disclosure [Table] Compensation Related Costs Share Based Payments Disclosure [Table] Award Type [Axis] Award Type [Axis] Award Type [Axis] Award Type [Domain] Award Type [Domain] Award Type [Domain] Restricted Stock Units (RSUs) [Member] Restricted Stock Units (RSUs) [Member] Performance Share [Member] Performance Share [Member] Performance Share Restricted stock awards [member] Restricted stock awards [member] Restricted Stock Awards Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Award Type and Plan Name [Axis] Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Award Type and Plan Name [Axis] Share-based Compensation Arrangements by Share-based Payment Award, Award Type and Plan Name [Domain] Share-based Compensation Arrangements by Share-based Payment Award, Award Type and Plan Name [Domain] Employee Stock Plan 2012 [Member] Employee Stock Plan 2012 [Member] Employee Stock Plan 2012 [Member] Outside directors stock plan 2012 [Member] Outside directors stock plan 2012 [Member] Outside directors stock plan 2012 [Member] Employee Qualified Stock Purchase Plan 1998 ESP Plan [Member] Employee Qualified Stock Purchase Plan 1998 ESP Plan [Member] Employee Qualified Stock Purchase Plan 1998 ESP Plan [Member] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Performance Share Units [Member] Performance Share Units [Member] Performance Share Units Range [Axis] Range [Axis] Range [Domain] Range [Domain] Maximum [Member] Maximum [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] Share based compensation arragements by share based payment awards, number of active plans (presented as an integer) Share based compensation arragements by share based payment awards, number of active plans Share based compensation arragements by share based payment awards, number of active plans Share based compensation arrangement by share based payment award expired or terminated plans (presented as an integer) Share based compensation arrangement by share based payment award expired or terminated plans Share based compensation arrangement by share based payment award expired or terminated plans Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Stock Issued During Period, Shares, Share-based Compensation, Forfeited Stock Issued During Period, Shares, Share-based Compensation, Forfeited Share-Based Compensation Shares Granted to Share Issued Share-Based Compensation Shares Granted to Share Issued Share-Based Compensation Shares Granted to Share Issued EmployeeStockPlanRestrictedStockSharesRemainingAvailableForIssuance EmployeeStockPlanRestrictedStockSharesRemainingAvailableForIssuance Restricted stock shares remaining available for issuance for the plan. Share Based Compensation Arrangement By Share Based Payment Award Maximum Vesting Period For Stock Options (in years) Share Based Compensation Arrangement By Share Based Payment Award Maximum Vesting Period For Stock Options Share Based Compensation Arrangement By Share Based Payment Award Maximum Vesting Period For Stock Options Share based compensation arrangement by 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 Employee Stock Plan Shares Remaining Available For Issuance Employee Stock Plan Shares Remaining Available For Issuance Shares remaining available for issuance for the plan. Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized (in usd) Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized Share Based Compensation Non Vested Options Outstanding Weighted Average Remaining Contractual Term (in years) Share Based Compensation Non Vested Options Outstanding Weighted Average Remaining Contractual Term Share based Compensation, Non Vested Options, Outstanding, Weighted Average Remaining Contractual Term Sale of Stock, Price Per Share (in usd per share) Sale of Stock, Price Per Share Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Allocated Share-based Compensation Expense (in usd) Allocated Share-based Compensation Expense Employee Service Share Based Compensation Unrecognized Compensation Costs On Nonvested Restricted Shares (in usd) Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition (in years) Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Employee Stock Purchase Plan Maximum Percentage Of Compensation To Purchase Shares By Eligible Participants (presented as a percent) 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 Employee Stock Purchase Plan Minimum Percentage Of Common Stock Fair Value Defined To Purchase Shares By Eligible Participants (presented as a percent) 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 Share-based Compensation Arrangement by Share-based Payment Award, Options, Other Increases (Decreases) in Period Share-based Compensation Arrangement by Share-based Payment Award, Options, Other Increases (Decreases) in Period Share Based Compensation Arrangement By Share Based Payment Award Options Other Increases Decreases In Period Percentage Calculation (presented as a percent) Share Based Compensation Arrangement By Share Based Payment Award Options Other Increases Decreases In Period Percentage Calculation Share Based Compensation Arrangement by Share Based Payment Award, Options, Other Increases (Decreases) in Period, Percentage Calculation Stock Issued During Period, Shares, Employee Stock Purchase Plans Stock Issued During Period, Shares, Employee Stock Purchase Plans Share Based Compensation Arrangement By Share Based Payment Award Shares Issued Average Price (in usd 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 Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Segments [Abstract] Segments [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] 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] UNITED STATES UNITED STATES Other Americas [Member] Other Americas [Member] Other Americas JAPAN JAPAN Other Asia Pacific [Member] Other Asia Pacific [Member] Other Asia Pacific Region Reporting Information, by Region [Axis] Region Reporting Information, by Region [Axis] Reporting Region [Domain] Reporting Region [Domain] Total Americas [Member] Total Americas [Member] Total Americas Europe Middle East And Africa [Member] Europe Middle East And Africa [Member] Europe, Middle East and Africa Asia [Member] Asia [Member] Asia Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Revenue, Net Revenue, Net Goodwill Goodwill Disclosure [Text Block] Disclosure - Financial Instruments and Hedgin Activities - Additional Information [Abstract] Disclosure - Financial Instruments and Hedgin Activities - Additional Information [Abstract] Proceeds from Sale and Maturity of Marketable Securities Proceeds from Sale and Maturity of Marketable Securities Notional Amount of Foreign Currency Cash Flow Hedge Derivatives Notional Amount of Foreign Currency Cash Flow Hedge Derivatives Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax Notional Amount of Foreign Currency Derivative Instruments Not Designated as Hedging Instruments Notional Amount of Foreign Currency Derivative Instruments Not Designated as Hedging Instruments Risks and Uncertainties [Abstract] Organization, Consolidation and Presentation of Financial Statements Disclosure [Table] Organization, Consolidation and Presentation of Financial Statements Disclosure [Table] Statement, Equity Components [Axis] Statement, Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Tech Data [Member] Tech Data [Member] Tech Data [Member] Concentration Risk by Benchmark [Axis] Concentration Risk by Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Accounts Receivable Accounts Receivable [Member] Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] Unsecured revolving credit facility (in usd) Line of Credit Facility, Maximum Borrowing Capacity Total sales to the distributors Tech Data Corporation and its global affiliates ("Tech Data") relative to Autodesk's consolidated net revenue Percentage Of Net Sales Percentage of Net Sales Percentage of gross accounts receivable accounted for by Tech Data Concentration Risk, Percentage Deferred Compensation Compensation Related Costs, General [Text Block] Disclosure Changes in the Carrying Amount of Goodwill [Abstract] Disclosure - Changes in the Carrying Amount of Goodwill [Abstract] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Statement, Business Segments [Axis] Statement, Business Segments [Axis] Segment [Domain] Segment [Domain] Platform Solutions and Emerging Business Platform Solutions and Emerging Business [Member] Platform Solutions and Emerging Business Architecture, Engineering and Construction Architecture Engineering And Construction [Member] Architecture, Engineering and Construction Manufacturing Manufacturing [Member] Manufacturing Media and Entertainment Media And Entertainment [member] Media and Entertainment Goodwill [Line Items] Goodwill [Line Items] Goodwill before accumulated impairment losses beginning balance Goodwill before accumulated impairments Accumulated impairment losses beginning balance Goodwill, Impaired, Accumulated Impairment Loss Goodwill Effect of foreign currency translation, purchase accounting and other Goodwill, Translation and Purchase Accounting Adjustments Goodwill before accumulated impairment losses ending balance Accumulated impairment losses ending balance Goodwill Number of reporting units (presented as an integer) Number of Reportable Business Segments Number of Reportable Business Segments Stock Based Compensation Expense [Abstract] Stock Based Compensation Expense [Abstract] 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] Component of Other Operating Cost and Expense, General [Axis] Component of Other Operating Cost and Expense, General [Axis] Component of Other Operating Cost and Expense, Name [Domain] Component of Other Operating Cost and Expense, Name [Domain] Cost of Sales [Member] Cost of Sales [Member] Selling and Marketing Expense [Member] Selling and Marketing Expense [Member] Other Research and Development Expense [Member] Other Research and Development Expense [Member] General and Administrative Expense [Member] General and Administrative Expense [Member] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Allocated Share-based Compensation Expense Share-based Compensation Share-based Compensation Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Allocated Share-based Compensation Expense, Net of Tax Allocated Share-based Compensation Expense, Net of Tax Computer Equipment, Software, Furniture and Leasehold Improvements, Net Property, Plant and Equipment Disclosure [Text Block] Accumulated Other Comprehensive Income [Abstract] Accumulated Other Comprehensive Income [Abstract] Comprehensive Income (Loss) Note [Text Block] Comprehensive Income (Loss) Note [Text Block] Disclosure - Summary of Restricted Stock Award and Restricted Stock Unit Activity [Abstract] Disclosure - Summary of Restricted Stock Award and Restricted Stock Unit Activity [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] Restricted Stock Awards And Restricted Stock Units (Member) Restricted Stock Awards And Restricted Stock Units (Member) Restricted Stock Awards and Restricted Stock Units Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] Unreleased restricted stock at January 31, 2012 Awarded Released 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. Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Unreleased restricted stocck at April 30, 2012 Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] Unreleased restricted stock at January 31, 2012 (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Awarded (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Released (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Forfeited (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period, Weighted Average Grant Date Fair Value Unreleased restricted stock at April 30, 2012 (in usd per share) Disclosure - Intrinsic Value of Options Exercised and Weighted Average Grant Date Fair Value of Stock Options Granted [Abstract] Disclosure - Intrinsic Value of Options Exercised and Weighted Average Grant Date Fair Value of Stock Options Granted [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value Basis of Presentation [Abstract] Basis of Presentation [Abstract] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Disclosure, Assumption Used to Estimate the Fair Value of Stock-Based Awards [Abstract] Disclosure - Assumption Used to Estimate the Fair Value of Stock-Based Awards [Abstract] Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Table] Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Table] Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Table] Stock Options Plan [Member] Stock Options Plan [Member] Employee Stock Option [Member] Employee Stock Option [Member] Employee Stock Option [Member] Minimum [Member] Minimum [Member] 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] Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Share Based Compensation Arrangement by Share Based Payment Award, Fair Value Assumptions Expected Forfeitures Share Based Compensation Arrangement by Share Based Payment Award, Fair Value Assumptions Expected Forfeitures Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Forfeitures Disclosure - Deferred Compensation - Additional Information [Abstract] Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits, by Title of Individual and by Type of Deferred Compensation [Table] Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits, by Title of Individual and by Type of Deferred Compensation [Table] Fair Value, Assets and Liabilities Measured on a Recurring Basis [Axis] Fair Value, Assets and Liabilities Measured on a Recurring Basis [Axis] Fair Value, Assets and Liabilities Measured on a Recurring Basis Axis Fair Value, Assets and Liabilities Measured on a Recurring Basis [Domain] Fair Value, Assets and Liabilities Measured on a Recurring Basis [Domain] Fair Value, Assets and Liabilities Measured on a Recurring Basis [Domain] Rabbi Trust Member Rabbi Trust Member Rabbi Trust Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Locations [Domain] Balance Sheet Locations [Domain] Balance Sheet Locations [Domain] Marketable Securities, Current [Member] Marketable Securities, Current [Member] Marketable Securities, Current [Member] 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 Trading Securities, Fair Value Disclosure Trading Securities, Fair Value Disclosure Deferred compensation liability current Deferred Compensation Liability, Current Deferred compensation liability Deferred Compensation Liability, Current and Noncurrent Deferred compensation liability non-current Deferred Compensation Liability, Classified, Noncurrent Disclosure - Fair Value of Derivative Instruments [Abstract] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Derivative Instrument Risk [Axis] Derivative Instrument Risk [Axis] Derivative Contract Type [Domain] Derivative Contract Type [Domain] Foreign Exchange Contract [Member] Foreign Exchange Contract [Member] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Designated as Hedging Instrument [Member] Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] Derivatives, Fair Value, by Balance Sheet Location [Axis] Derivatives, Fair Value, by Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Prepaid expenses and other current assets [member] Prepaid expenses and other current assets [member] Prepaidexpensesandothercurrentassetsmember Other Assets [Member] Other Assets [Member] Other Accrued Liabilities [Member] Other Accrued Liabilities [Member] Other Accrued Liabilities [Member] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Derivative Asset, Fair Value, Gross Asset Derivative Asset, Fair Value, Gross Asset Derivative Liability, Fair Value, Gross Liability Derivative Liability, Fair Value, Gross Liability Property, Plant and Equipment Property, Plant and Equipment [Table Text Block] Dislosure - Effects of Derivative Instruments on Condensed Consolidated Statements of Operations [Abstract] Dislosure - Effects of Derivative Instruments on Condensed Consolidated Statements of Operations [Abstract] Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) by Income Statement Location [Axis] Derivative Instruments, Gain (Loss) by Income Statement Location [Axis] Income Statement and Other Comprehensive Income (Loss) Location [Domain] Income Statement and Other Comprehensive Income (Loss) Location [Domain] Sales [Member] Sales [Member] Operating Expense [Member] Operating Expense [Member] Interest and other income (expense), net [member] Interest and other income (expense), net [member] Interest Income (Expense), Net Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Net Income (Loss) Attributable to Parent Net Income (Loss) Attributable to Parent Amount of gain (loss) recognized in accumulated other comprehensive income on derivatives (effective portion) Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Interest and other income (expense), net Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net Interest and other income, net Derivative Instruments, Gain (Loss) Recognized in Income, Net Financial Instruments [Abstract] Financial Instruments [Abstract] Cost And Fair Value Of Financial Instruments Disclosure Cost And Fair Value Of Financial Instruments Disclosure Cost and Fair Value of Financial Instruments Disclosure [Table Text Block] Fair Value, Assets Measured on Recurring Basis [Table Text Block] Fair Value, Assets Measured on Recurring Basis [Table Text Block] Available-for-sale Securities [Table Text Block] Available-for-sale Securities [Table Text Block] Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Table Text Block] Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Table Text Block] Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block] Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block] Net loss on derivative instruments Net unrealized gain on available-for-sale securities Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Unfunded portion of pension plans Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax Foreign currency translation adjustments Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Accumulated other comprehensive income (loss) Disclosure - Borrowing Arrangements - Additional Information [Abstract] Unsecured revolving credit facility Line of credit facility, additional borrowings available Line of credit facility, additional borrowings available Line of credit facility, additional borrowings available Line of credit facility, outstanding borrowings Line of Credit Facility, Amount Outstanding Line of credit facility, expiration (presented as a date) Line of Credit Facility, Expiration Date Disclosure Computer Equipment, Software, Furniture, Leasehold Improvements and the Related Accumulated Depreciation [Abstract] Disclosure - Computer Equipment, Software, Furniture, Leasehold Improvements and the Related Accumulated Depreciation [Abstract] Schedule of Property, Plant and Equipment [Table] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Computer software, at cost Capitalized Computer Software, Gross Computer hardware, at cost Computer Hardware Gross Computer Hardware, 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 Property, Plant and Equipment, Gross, Total 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 Income Statement [Abstract] Net revenue: Revenue, Net [Abstract] License and other License and Services Revenue Maintenance Maintenance Revenue Total net revenue Cost of revenue: Cost of Revenue [Abstract] Cost of license and other revenue License Costs Cost of maintenance revenue Maintenance Costs 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 Total operating expenses Operating Expenses Income from operations Operating Income (Loss) Interest and other income, net Interest Income (Expense), Net Income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Provision for income taxes Income Tax Expense (Benefit) Net income Basic net income per share (in usd per share) Earnings Per Share, Basic Diluted net income per share (in usd per share) Earnings Per Share, Diluted Weighted average shares used in computing basic net income per share (in usd per share) Weighted Average Number of Shares Outstanding, Basic Weighted average shares used in computing diluted net income per share (in usd per share) Weighted Average Number of Shares Outstanding, Diluted Other Intangible Assets, Net Intangible Assets Disclosure [Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Calculation of Numerator and Denominator in Earnings Per Share Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block] Statement [Table] Statement [Table] Statement [Line Items] Statement [Line Items] Fair Value Measurements Fair Value Disclosures [Text Block] Schedule of Share-based Compensation, Stock Options, Activity Schedule of 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 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] Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [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 [Table Text Block] Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] Statement of Cash Flows [Abstract] Operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Stock-based compensation expense Excess tax benefits from stock-based compensation Excess Tax Benefit from Share-based Compensation, Operating Activities Changes in operating assets and liabilities, net of business combinations Increase (Decrease) in Operating Capital 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 Capital expenditures Payments to Acquire Property, Plant, and Equipment Acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Other investing activities Payments for (Proceeds from) Other Investing Activities 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, net of issuance costs Proceeds from Issuance of Common Stock Repurchases of common stock Payments for Repurchase of Common Stock Excess tax benefits from stock-based compensation Excess Tax Benefit from Share-based Compensation, Financing Activities Net cash 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 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 period Borrowing Arrangements Debt Disclosure [Text Block] Disclosure - Common Stock Repurchase Program - Additional Information [Abstract] Disclosure - Common Stock Repurchase Program - Additional Information [Abstract] Stockholders Equity Note [Table] Stockholders Equity Note [Table] Common Stock [Member] Common Stock [Member] Retained Earnings Retained Earnings [Member] Share Repurchases, by Program [Axis] Share Repurchases, by Program [Axis] Share Repurchases, by Program [Domain] Share Repurchases, by Program [Domain] Common Stock Repurchase Program Common Stock Repurchase Program [member] Common Stock Repurchase Program Stockholders Equity Note [Line Items] Stockholders Equity Note [Line Items] Common stock repurchased and retired (in shares) Stock Repurchased and Retired During Period, Shares Repurchased shares of its common stock on the open market, average repurchase price per share (in usd per share) Treasury Stock Acquired, Average Cost Per Share Repurchased shares of its common stock on the open market, value Stock Repurchased and Retired During Period, Value Common Stock shares remained available for repurchase under repurchase plans (in shares) Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased Disclosure - Available-For-Sale Securities [Abstract] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Marketable Securities, Noncurrent [Member] Marketable Securities, Noncurrent [Member] Marketable Securities, Noncurrent [Member] Convertible debt securities [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value, Measurements, Fair Value Hierarchy [Domain] Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] domain definition to add: ype of cash and cash equivalent. Cash is currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Cash and Cash Equivalent [Domain] Cash and Cash Equivalent [Domain] Cash and Cash Equivalent [Domain] Certificates of deposit and time deposits [member] Certificates of deposit and time deposits [member] Certificates of deposit and time deposits. Commercial Paper [Member] Commercial Paper [Member] Money Market Funds [Member] Money Market Funds [Member] US Government Corporations and Agencies Securities [Member] US Government Corporations and Agencies Securities [Member] Schedule of Available-for-sale Securities, Major Types of Debt and Equity Securities [Axis] Schedule of Available-for-sale Securities, Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Commercial paper and corporate securities [member] Commercial paper and corporate securities [member] Commercial Paper and Corporate Securities US Treasury Securities [Member] US Treasury Securities [Member] US Government Agencies Debt Securities [Member] US Government Agencies Debt Securities [Member] US States and Political Subdivisions Debt Securities [Member] US States and Political Subdivisions Debt Securities [Member] Sovereign Debt [Member] Sovereign Debt [Member] Other [Member] Other securities [Member] Other securities [Member] Corporate Debt Securities [Member] Corporate Debt Securities [Member] Taxable Auction Rate Securities [Member] Auction Rate Securities [Member] Derivative [Member] Derivative [Member] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Cash and Cash Equivalents, at Carrying Value Available-for-sale Securities, Gross Unrealized Gains Available-for-sale Securities, Gross Unrealized Gains Available-for-sale Securities, Gross Unrealized Losses Available-for-sale Securities, Gross Unrealized Losses Available-for-sale Securities, Amortized Cost Basis Available-for-sale Securities, Amortized Cost Basis Cash and Cash Equivalents, Fair Value Disclosure Cash and Cash Equivalents, Fair Value Disclosure Available-for-sale Securities, Fair Value Disclosure Available-for-sale Securities, Fair Value Disclosure Trading Securities Trading Securities Trading Securities, Unrealized Holding Gain Trading Securities, Unrealized Holding Gain Trading Securities, Unrealized Holding Loss Trading Securities, Unrealized Holding Loss Convertible Debt Securities, Amortized Cost Convertible Debt Securities, Amortized Cost Convertible Debt Securities, Amortized Cost Convertible Debt Securities, Unrealized Gains Convertible Debt Securities, Unrealized Gains Convertible Debt Securities, Unrealized Gains Convertible Debt Securities, Unrealized Losses Convertible Debt Securities, Unrealized Losses Convertible Debt Securities, Unrealized Losses Convertible Debt Securities, Fair Value Disclosure Convertible Debt Securities, Fair Value Disclosure Convertible Debt Securities, Fair Value Disclosure Derivative, Fair Value, Net Derivative, Fair Value, Net Amortized Cost Securities Amortized Cost Securities Amortized Cost Securities Unrealized Gain on Securities Unrealized Gain on Securities Unrealized Loss on Securities Unrealized Loss on Securities Fair Value, Assets Measured on Recurring Basis Fair Value, Assets Measured on Recurring Basis Fair Value, Assets Measured on Recurring Basis Disclosure Reconciliation of the Change in Level 3 Items [Abstract] Disclosure Reconciliation of the Change in Level 3 Items [Abstract] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value by Asset Class [Axis] Fair Value by Asset Class [Axis] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, by Asset Class [Domain] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, by Asset Class [Domain] Convertible Debt Securities [Member] Convertible Debt Securities [Member] Auction Rate 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] Balance at January 31,2012 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Transfer into (out of) Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net Redemptions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, Sales, Issuances, Settlements Total unrealizrd gains (losses) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Balance at April 30,2012 Statement of Income and Comprehensive Income [Abstract] Other comprehensive income, net of tax and reclassification Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent [Abstract] Net loss on derivative instruments Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent Change in net unrealized gain on available-for-sale securities Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Change in unfunded portion of pension plans Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax, Portion Attributable to Parent Net change in cumulative foreign currency translation gain Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Total other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Total comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Unallocated Amount to Segment [Member] Unallocated Amount to Segment [Member] Gross Profit Document Document and Entity Information [Abstract] Document - Document and Entity Information [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Disclosure - Other Intangible Assets and Related Accumulated Amortization [Abstract] Schedule of Finite-Lived Intangible Assets by Major Class [Table] Schedule of Finite-Lived Intangible Assets by Major Class [Table] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Purchased technologies at cost Purchased technologies at cost Finite Lived Purchased Technologies Gross Customer relationships and trade names, at cost Other Finite-Lived Intangible Assets, Gross Finite-Lived Intangible Assets, Gross, Total Finite-Lived Intangible Assets, Gross Less: Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Other intangible assets, net Finite-Lived Intangible Assets, Net Financial Instruments and Hedging Activities Financial Instruments and Hedging Activities This item represents the entire disclosure related to Investments in Certain Debt and Equity Securities (and certain other trading assets) which include all debt and equity securities (other than those equity securities accounted for under the equity or cost methods of accounting) with readily determinable fair values. Other trading assets include assets that are carried on the balance sheet at fair value and held for trading purposes. A debt security represents a creditor relationship with an enterprise that is in the form of a security. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities (and other trading assets). This element is a also used to disclose the entity's entire derivative instruments and hedging activities disclosure as a single block of text. Describes an entity's risk management strategies, derivatives in hedging activities and non-hedging derivative instruments, the assets, obligations, liabilities, revenues and expenses arising there from, and the amounts of and methodologies and assumptions used in determining the amounts of such items. Segment Reporting Disclosure [Text Block] Segment Reporting Disclosure [Text Block] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Disclosure - Summary of Stock Option Activity [Abstract] Disclosure - Summary of Stock Option Activity [Abstract] Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Axis] Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Axis] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] Range 1 [Member] Range 1 [Member] Range 1 Range 2 [Member] Range 2 [Member] Range 2 Range3 [Member] Range3 [Member] Range 3 Range4 [Member] Range4Member Range 4 Range 5 [Member] Range 5 [Member] Range 5 ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerLimit ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerLimit Share Based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Limit ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperLimit ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperLimit Share Based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Limit Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, 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 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value (in usd) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value (in usd) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, 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 Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value (in usd) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Net Income Per Share [Abstract] Net Income Per Share [Abstract] Earnings Per Share [Text Block] Earnings Per Share [Text Block] Income Taxes Income Tax Disclosure [Text Block] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Schedule of Acquired Intangible Assets by Major Class ScheduleOfAcquiredIntangibleAssetsByMajorClass In the period of acquisition, an Entity must disclose the characteristics of intangible assets acquired. Intangible assets are assets that have no physical form, but have expected future economic benefit. Acquired intangible assets are disclosed by major class (assets that can be grouped together because they are similar, either by their nature or by their use in operations of the Entity) and in total. Additionally, any significant residual value (the expected value of the asset at the end of its useful life) and the weighted-average amortization period must also be disclosed. Recently Issued Accounting Standards [Abstract] Recently Issued Accounting Standards [Abstract] DescriptionOfNewAccountingPronouncementsRecentlyAdoptedAndNotYetAdoptedTextBlock DescriptionOfNewAccountingPronouncementsRecentlyAdoptedAndNotYetAdoptedTextBlock The entire disclosure for a new accounting pronouncements may include a new accounting pronouncement recently adopted and/or a new accounting pronouncement that has been issued but not yet adopted. Concentration of Credit Risk Concentration Risk Disclosure [Text Block] Stock-based Compensation Expense Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Disclosure - Income Taxes - Additional Information [Abstract] Disclosure - Income Taxes - Additional Information [Abstract] Income Taxes [Table] Income Taxes [Table] Income Taxes [Table] Income Taxes [Line Items] Income Taxes [Line Items] Income Taxes [Line Items] Effective tax rates (in percent) Effective Income Tax Rate, Continuing Operations Discrete tax (benefit) expense related to stock-based compensation expense Discrete Tax Items The sum of discrete tax items that reconcile the federal statutory tax provision (benefit) to the effective tax provision (benefit) excluding the impact of discrete tax items. Effective tax rate excluding the impact of discrete tax items (in percent) Effective tax rate excluding the impact of discrete tax items Effective Income Tax Rate Federal statutory tax rate (in percent) Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate Gross unrecognized tax benefits Unrecognized Tax Benefits Amount of gross unrecognized tax benefits that would impact the effective tax rate, if recognized Unrecognized Tax Benefits that Would Impact Effective Tax Rate Net deferred tax assets Deferred Tax Assets (Liabilities), Net Disclosure - Net Income Per Share - Additional Information [Abstract] Denominator for basic net income per share-wirghted average shares Effect of dilutive securities Weighted Average Number Diluted Shares Outstanding Adjustment Denominator for dilutive net income per share Potentially dilutive shares excluded from the computation of diluted net income per share Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Common Stock Repurchase Program Treasury Stock [Text Block]