Financial Instruments [Abstract] Financial Instruments [Abstract] Cost And Fair Value Of Financial Instruments Disclosure Cost And Fair Value Of Financial Instruments [Table Text Block] Cost and Fair Value of Financial Instruments Disclosure [Table Text Block] Fair Value, Assets Measured on Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Available-for-sale Securities Available-for-sale Securities [Table Text Block] Schedule of Derivative Instruments in Statement of Financial Position, Fair Value Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance Derivative Instruments, Gain (Loss) [Table Text Block] 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 [Axis] Derivative Contract Type [Domain] Derivative Contract [Domain] Foreign currency contracts Foreign Exchange Contract [Member] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Designated as hedging instrument Designated as Hedging Instrument [Member] Not designated as hedging instrument Not Designated as Hedging Instrument [Member] Derivatives, Fair Value, by Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Prepaid expenses and other current assets Prepaid Expenses and Other Current Assets [Member] Prepaid expenses and other current assets and Other assets Other Assets [Member] Other accrued liabilities Other Accrued Liabilities [Member] Other Accrued Liabilities [Member] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Derivative, notional amount Derivative, Notional Amount Net gain on derivative instruments Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax Derivative Assets Derivative Asset, Fair Value, Amount Not Offset Against Collateral Derivative Liabilities Derivative Liability, Fair Value, Amount Not Offset Against Collateral Derivative assets, gross Derivative Asset, Fair Value, Gross Asset Derivative liabilities, gross Derivative Liability, Fair Value, Gross Liability Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Shotgun Shotgun [Member] Shotgun [Member] Within Technologies Within Technologies Limited [Member] Within Technologies Limited [Member] Delcam Delcam [Member] Delcam [Member] Other Series of Individually Immaterial Business Acquisitions [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Consideration Business Combination, Consideration Transferred Cash consideration Payments to Acquire Businesses, Gross Fair value of original convertible debt investment Fair Value of Original Convertible Debt Investment Fair Value of Original Convertible Debt Investment Goodwill, expected tax deductible amount Business Acquisition, Goodwill, Expected Tax Deductible Amount Number of businesses acquired (businesses) Number of Businesses Acquired Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Accumulated Other Comprehensive Income (Loss) Comprehensive Income (Loss) Note [Text Block] Other than temporary impairment losses, investments Other than Temporary Impairment Losses, Investments Gain (loss) on investments Gain (Loss) on Investments Proceeds from sale and maturity of marketable securities Proceeds from Sale and Maturity of Marketable Securities Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Marketable securities Marketable Securities, Current Accounts receivable, net Accounts Receivable, Net, Current 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 Property, Plant and Equipment, Net Developed technologies, net Intangible Assets, Net (Excluding Goodwill) Goodwill 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 notes payable, net of discount Long-term Debt Other liabilities Other Liabilities, Noncurrent Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock Preferred Stock, Value, Issued Common stock and additional paid-in capital 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 Stockholders' Equity Attributable to Parent Total liabilities and stockholders' equity Liabilities and Equity Document and Entity Information [Abstract] 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 Deferred Compensation Arrangements [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 Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] Marketable securities Marketable Securities Deferred compensation liability Deferred Compensation Liability, Current and Noncurrent Deferred compensation liability current Deferred Compensation Liability, Current Deferred compensation liability non-current Deferred Compensation Liability, Classified, Noncurrent Statement of Comprehensive Income [Abstract] Net income Net Income (Loss) Attributable to Parent Other comprehensive income, net of reclassifications: Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent [Abstract] Net gain (loss) on derivative instruments (net of tax effect of $0.5, $0.3, ($0.6) and $0.5) Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent Change in net unrealized (loss) gain on available-for-sale securities (net of tax effect of $0.7, ($0.2), $0.7 and ($0.2)) Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Net change in cumulative foreign currency translation (loss) gain (net of tax effect of $3.4, ($1.0), $2.9 and $1.0) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Total other comprehensive (loss) gain Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Total comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Risks and Uncertainties [Abstract] Concentration of Credit Risk Concentration Risk Disclosure [Text Block] Class of Stock Disclosures [Abstract] Common Stock Repurchase Program Treasury Stock [Text Block] Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Adjustments for Change in Accounting Principle [Axis] Adjustments for Change in Accounting Principle [Axis] Adjustments for Change in Accounting Principle [Domain] Adjustments for Change in Accounting Principle [Domain] Reclassification of Amortization Of Intangible Assets Reclassification of Amortization Of Intangible Assets [Member] Reclassification of Amortization Of Intangible Assets [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] (Decrease) to general and administrative General and Administrative Expense Increase to amortization of purchased intangibles Amortization of Intangible Assets Income Statement [Abstract] Net revenue: Revenue, Net [Abstract] License and other License and Services Revenue Subscription Subscription and Circulation Revenue Total net revenue Revenue, Net Cost of revenue: Cost of Revenue [Abstract] Cost of license and other revenue License Costs Cost of subscription revenue Cost of Goods Sold, Subscription 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 Amortization of purchased intangibles Restructuring charges, net Restructuring Charges Total operating expenses Operating Expenses Income from operations Operating Income (Loss) Interest and other (expense) 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 Weighted Average Number of Shares Outstanding, Basic Weighted average shares used in computing diluted net income per share Weighted Average Number of Shares Outstanding, Diluted Earnings Per Share [Abstract] Denominator: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Denominator for basic net income per share—weighted 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 Schedule of Recognized Identified Assets Acquired and Liabilities Assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Property, Plant and Equipment [Abstract] Computer Equipment, Software, Furniture and Leasehold Improvements, Net Property, Plant and Equipment Disclosure [Text Block] Deferred Compensation Compensation Related Costs, General [Text Block] Income Tax Disclosure [Abstract] Effective tax rate Effective Income Tax Rate Reconciliation, Percent Decrease in effective tax rate Effective Tax Rate - Increase/Decrease in the effective tax rate Effective Tax Rate - Increase/Decrease in the effective tax rate Effective tax rate excluding the impact of discrete tax items Effective tax rate excluding the impact of discrete tax items Effective Income Tax Rate Federal statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Unrecognized tax benefits Unrecognized Tax Benefits Unrecognized tax benefits that would impact effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Deferred tax assets, net Deferred Tax Assets, Net Reduction in deferred tax assets Increase (Decrease) in Deferred Income Taxes Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Other acquisitions Statement, Business Segments [Axis] Segments [Axis] Segment [Domain] Segments [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 [Roll Forward] Goodwill [Roll Forward] Goodwill before accumulated impairment losses beginning balance Goodwill before accumulated impairments Goodwill before accumulated impairments Accumulated impairment losses beginning balance Goodwill, Impaired, Accumulated Impairment Loss Goodwill Goodwill, acquired during period Goodwill, Acquired During Period 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 Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Table] Derivative Instrument Risk [Axis] Derivative Instruments, Gain (Loss) by Income Statement Location [Axis] Income Statement Location [Axis] Income Statement and Other Comprehensive Income (Loss) Location [Domain] Income Statement Location [Domain] Net revenue Sales [Member] Operating expenses Operating Expense [Member] Interest and other (expense) income, net Interest and other income (expense), net [member] Interest Income (Expense), Net Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Amount of gain (loss) recognized in accumulated other comprehensive income on derivatives (effective portion) Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net Amount and location of gain (loss) reclassified from accumulated other comprehensive income into income (effective portion) Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Amount and location of gain (loss) recognized in income on derivatives (ineffective portion and amount excluded from effectiveness testing) Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net Amount and location of (loss) gain recognized in income on derivatives Derivative, Gain (Loss) on Derivative, Net Income Tax Income Tax Disclosure [Text Block] New Accounting Pronouncements and Changes in Accounting Principles [Abstract] Recently Issued Accounting Standards New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Concentration of Risk [Table] Concentration Risk [Table] Statement, Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Tech Data Tech Data [Member] Tech Data [Member] Concentration Risk by Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Accounts Receivable Accounts Receivable [Member] Concentration Risk [Line Items] Concentration Risk [Line Items] Unsecured revolving credit facility 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 Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Americas Americas [Member] Europe, Middle East and Africa EMEA [Member] Asia Pacific Asia Pacific [Member] 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. UNITED STATES Other Americas Other Americas [Member] Other Americas Japan JAPAN Other Asia Pacific Other Asia Pacific [Member] Other Asia Pacific Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Net revenue Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Recently Issued Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Net gain (loss) on derivative instruments - tax effect Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax Change in net unrealized loss on available-for-sale securities, tax effect Other Comprehensive Income (Loss), Available-for-sale Securities, Tax Net change in cumulative foreign currency translation (loss) gain, tax effect Other Comprehensive Income (Loss), Foreign Currency Translation Gain (Loss) Arising During Period, Tax Schedule of Calculation of Numerator and Denominator in Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] 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] Asset Class [Axis] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, by Asset Class [Domain] Asset Class [Domain] Derivative Contracts Derivative [Member] Convertible Debt Securities Convertible Debt Securities [Member] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Balance at January 31, 2014 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Net realized (losses) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Net unrealized (losses) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Balance at October 31, 2014 Finite-Lived Intangible Assets, Net [Abstract] Other Intangible Assets, Net Intangible Assets Disclosure [Text Block] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Computer software, at cost Software Development [Member] Computer hardware, at cost Computer Equipment [Member] Leasehold improvements, land and buildings, at cost Land, Buildings and Improvements [Member] Furniture and equipment, at cost Furniture and Equipment [Member] Furniture and Equipment [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Computer software, hardware, leasehold improvements, furniture and equipment, gross 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 Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Developed technologies Developed Technology Rights [Member] Customer relationships and other non-current intangible assets Customer Relationships And Other Noncurrent Intangible Assets [Member] Customer Relationships And Other Noncurrent Intangible Assets [Member] Trade name Trade Names [Member] Finite-lived intangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Goodwill Deferred revenue (current and non-current) Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Revenue Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Revenue Deferred tax liability Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent Net tangible assets (liabilities) Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Excluding Intangible Assets And Deferrals Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Excluding Intangible Assets And Deferrals Total Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Line of Credit Facility [Abstract] Borrowing Arrangements Debt Disclosure [Text Block] Schedule of Goodwill Schedule of Goodwill [Table Text Block] Disclosure of Compensation Related Costs, Share-based Payments [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] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Performance Stock Unit Performance Shares [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] ESP Plan Employee Qualified Stock Purchase Plan 1998 ESP Plan [Member] Employee Qualified Stock Purchase Plan 1998 ESP Plan [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [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] Range of expected volatilities Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Range of expected lives (in years) 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 Reclassifications Reclassification [Table Text Block] [Table Text Block] for Reclassification [Table] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Senior Notes Senior Notes [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Senior Notes 2017 Senior Notes 2017 [Member] Senior Notes 2017 [Member] Senior Notes 2022 Senior Notes 2022 [Member] Senior Notes 2022 [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Debt instrument, face amount Debt Instrument, Face Amount Debt instrument, stated interest rate Debt Instrument, Interest Rate, Stated Percentage Proceeds from debt, net of issuance costs Proceeds from Debt, Net of Issuance Costs Debt instrument, unamortized discount Debt Instrument, Unamortized Discount Debt issuance cost Debt Issuance Cost Debt issuance redemption discount premium, percentage of principle amount Debt Issuance Redemption Discount Premium Percentage Of Principal Amount Debt Issuance Redemption Discount Premium Percentage Of Principal Amount Debt fair value Debt Instrument, Fair Value Disclosure Line of credit facility, maximum borrowing capacity 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, expiration date Line of Credit Facility, Expiration Date Line of credit facility, outstanding borrowings Long-term Line of Credit Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Certificates of deposit and time deposits Bank Time Deposits [Member] Agency discount note Corporate Bond Securities [Member] Commercial paper Commercial Paper [Member] Municipal securities US States and Political Subdivisions Debt Securities [Member] Money market funds Money Market Funds [Member] Other Other Cash Equivalents [Member] Other Cash Equivalents [Member] Balance Sheet Location [Axis] Short-term available for sale Short-term Investments [Member] Long-term available for sale Other Long-term Investments [Member] Convertible debt securities Schedule of Available-for-sale Securities, Major Types of Debt and Equity Securities [Axis] 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 certificates of deposit Commercial Paper, Not Included with Cash and Cash Equivalents [Member] Time deposits Corporate debt securities Corporate Debt Securities [Member] Corporate debt securities Agency Bonds [Member] Agency Bonds [Member] Municipal securities US Government Agencies Debt Securities [Member] Treasury bill US Treasury Bill Securities [Member] Other Other securities [Member] Other securities [Member] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Cash equivalents Cash equivalents, Fair Value Cash and Cash Equivalents, Fair Value Disclosure Marketable securities, Amortized Cost Available-for-sale Securities, Amortized Cost Basis Marketable securities, Gross unrealized gains Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax Marketable securities, Gross unrealized losses Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Marketable securities, Fair Value Available-for-sale Securities Mutual funds, Amortized Cost Trading Securities, Short-term Investments, Amortized Cost Mutual funds, Gross unrealized gains Trading Securities, Accumulated Gross Unrealized Gain, before Tax Trading Securities, Accumulated Gross Unrealized Gain, before Tax Mutual funds, Gross unrealized losses Trading Securities, Accumulated Gross Unrealized Loss, before Tax Trading Securities, Accumulated Gross Unrealized Loss, before Tax Mutual funds, Fair Value Trading Securities Total Available-for-sale Debt Securities, Amortized Cost Basis Convertible debt securities, Gross unrealized gains Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax Convertible debt securities, Gross unrealized losses Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax Convertible debt securities, Fair Value Convertible Debt Securities, Fair Value Disclosure Convertible Debt Securities, Fair Value Disclosure Derivative contracts, Amortized Cost Derivative Instruments and Hedges, Carrying Amount Derivative Instruments and Hedges, Carrying Amount Derivative contracts, Gross unrealized gains Derivative Assets, Accumulated Gross Unrealized Gain, before Tax Derivative Assets, Accumulated Gross Unrealized Gain, before Tax Derivative contracts, Gross unrealized losses Derivative Assets, Accumulated Gross Unrealized Loss, before Tax Derivative Assets, Accumulated Gross Unrealized Loss, before Tax Derivative contracts, Fair Value Derivative Asset Amortized Cost Amortized Cost Securities Amortized Cost Securities Gross unrealized gains Investments, Accumulated Gross Unrealized Gain, before Tax Investments, Accumulated Gross Unrealized Gain, before Tax Gross unrealized losses Investments, Accumulated Gross Unrealized Loss, before Tax Investments, Accumulated Gross Unrealized Loss, before Tax Fair Value Fair Value, Assets Measured on Recurring Basis Fair Value, Assets Measured on Recurring Basis Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Axis] 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] $2.28 - $29.49 Range 1 [Member] Range 1 $29.50 - $41.62 Range 2 [Member] Range 2 $42.39 - $43.81 Range3 [Member] Range 3 Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] 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 vested and exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Options vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Options available (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Weighted average exercise price per share Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Outstanding (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Canceled/Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Vested and exercisable (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Vested (in dollars per share) 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, Additional Disclosures [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Options outstanding, Weighted average remaining contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Options vested and exercisable, Weighted average remaining contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Options vested, Weighted average remaining contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Options outstanding, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Options vested and exercisable, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Options vested, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Exercise Price, Lower Limit (in dollars per share) ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerLimit Share Based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Limit Exercise Price, Upper Limit (in dollars per share) ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperLimit Share Based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Limit Segments Segment Reporting Disclosure [Text Block] Statement of Cash Flows [Abstract] Operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] 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, amortization and accretion Depreciation, Depletion and Amortization, Nonproduction Stock-based compensation expense Share-based Compensation Excess tax benefits from stock-based compensation Excess Tax Benefit from Share-based Compensation, Operating Activities Restructuring charges, net Restructuring Costs Other operating activities Other Operating Activities, Cash Flow Statement 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 Repurchase and retirement of common shares Payments for Repurchase of Common Stock 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 used in financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash and Cash Equivalents Net decrease in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents at beginning of fiscal year Cash and cash equivalents at end of period Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] 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] Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Income Statement Location [Axis] Income Statement Location [Domain] Cost of license and other revenue License Costs [Member] License Costs [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] Allocated share-based compensation expense Allocated Share-based Compensation Expense Stock-based compensation expense related to stock awards and ESPP purchases Tax benefit Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Stock-based compensation expense related to stock awards and ESPP purchases, net of tax Allocated Share-based Compensation Expense, Net of Tax Schedule of Finite-Lived Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Stock-based Compensation Expense Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Restructuring and Related Activities [Abstract] Schedule of Restructuring and Related Costs Restructuring and Related Costs [Table Text Block] Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Restructuring Plan [Axis] Restructuring Plan [Axis] Restructuring Plan [Domain] Restructuring Plan [Domain] Fiscal 2014 Plan Fiscal 2014 Plan [Member] Fiscal 2014 Plan [Member] Restructuring Type [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Employee termination costs Employee Severance [Member] Lease termination and asset costs Facility Closing [Member] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Number of positions eliminated (position) Restructuring and Related Cost, Number of Positions Eliminated Number of facilities consolidated (facilities) Number Of Facilities That Were Consolidated Number of Facilities that were Consolidated Expected cost Restructuring and Related Cost, Expected Cost Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Beginning Balance Restructuring Reserve Additions Payments Payments for Restructuring Adjustments Restructuring Reserve, Translation and Other Adjustment Ending Balance Current portion Restructuring Reserve, Current Non-current portion Restructuring Reserve, Noncurrent Goodwill Goodwill Disclosure [Text Block] Acquisitions Business Combination Disclosure [Text Block] Restricted Stock Units (RSUs) and Performance Shares Restricted Stock Units (RSUs) and Performance Shares [Member] Restricted Stock Units (RSUs) and Performance Shares [Member] Unvested Restricted Stock Units Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Unvested restricted stock units at January 31, 2014 (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Canceled/Forfeited (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Performance adjustment (shares) Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Adjustments In Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Performance Adjustment In Period Unvested restricted stock units at October 31, 2014 (shares) Weighted average grant date fair value per share Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Weighted Average Grant Date Fair Value [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Weighted Average Grant Date Fair Value [Roll Forward] Unvested restricted stock units at January 31, 2014 (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Vested (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Canceled/Forfeited (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Performance adjustment (in usd per share) Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Adjustments, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Performance Adjustment, Weighted Average Grant Date Fair Value Unvested restricted stock units at October 31, 2014 (usd per share) Performance shares units payout Performance Shares, Units, Payout Percentage Performance Shares, Units, Payout Percentage Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Developed technologies, at cost Customer relationships, trade names, patents, and user list, at cost Customer Relationships, Trade Names, Patents, and User List [Member] Customer Relationships, Trade Names, Patents, and User List [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Other intangible assets, gross Finite-Lived Intangible Assets, Gross Less: Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Other intangible assets, net Finite-Lived Intangible Assets, Net Class of Treasury Stock [Table] Class of Treasury Stock [Table] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Share Repurchase Program [Domain] Common Stock Repurchase Program Common Stock Repurchase Program [member] Common Stock Repurchase Program Common Stock Common Stock [Member] Retained Earnings Retained Earnings [Member] Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [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 Pre-tax intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Weighted average grant date fair value per share of stock options granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Restructuring Restructuring and Related Activities Disclosure [Text Block] Cost Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Rolling Maturity [Abstract] Due within 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 Fair Value Available-for-sale Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract] Due within 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 Total Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Property, Plant and Equipment Property, Plant and Equipment [Table Text Block] Net Income Per Share Earnings Per Share [Text Block] Compensation Related Costs Share Based Payments Disclosure [Table] Compensation Related Costs Share Based Payments Disclosure [Table] Compensation Related Costs Share Based Payments Disclosure [Table] Employee Stock Plan 2012 Employee Stock Plan 2012 [Member] Employee Stock Plan 2012 [Member] Directors stock plan 2012 Directors stock plan 2012 [Member] Directors stock plan 2012 [Member] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] Share-based compensation award, tranche one Share-based Compensation Award, Tranche One [Member] First portion of share-based compensation award differentiated by a particular vesting feature, including, but not limited to, performance measure or service period. Share-based compensation award, tranche two Share-based Compensation Award, Tranche Two [Member] Second portion of share-based compensation award differentiated by a particular vesting feature, including, but not limited to, performance measure or service period. Share-based compensation award, tranche three Share-based Compensation Award, Tranche Three [Member] Third portion of share-based compensation award differentiated by a particular vesting feature, including, but not limited to, performance measure or service period. 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 arrangements by share based payment awards, number of active plans (plan) Share based compensation arrangements by share based payment awards, number of active plans Share based compensation arrangements by share based payment awards, number of active plans Share based compensation arrangement by share based payment award expired or terminated plans (plan) 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 Awards, number of additional shares authorized Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Awards, 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 Options granted in period Award vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 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. Sale of stock, price per share (in usd per share) Sale of Stock, Price Per Share Nonvested awards, total compensation cost not yet recognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Nonvested options outstanding, weighted average remaining contractual term Share Based Compensation Non Vested Options Outstanding Weighted Average Remaining Contractual Term Share based Compensation, Non Vested Options, Outstanding, Weighted Average Remaining Contractual Term Awards granted in period, weighted average grant date fair value (in usd per share) Awards vested in period, fair value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Awards granted in period PSU Annual Vesting Percentage Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Nonvested awards, total compensation cost not yet recognized, period for recognition Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Awards, nonvested, number 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, 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 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 Options, other increases (decreases) in period Share-based Compensation Arrangement by Share-based Payment Award, Options, Other Increases (Decreases) in Period 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 Share Based Compensation Arrangement by Share Based Payment Award, Options, Other Increases (Decreases) in Period, Percentage Calculation Shares issued under employee stock purchase plans Stock Issued During Period, Shares, Employee Stock Purchase Plans Awards issued, share 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 Financial Instruments Financial Instruments Disclosure [Text Block] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Unallocated Segment Reconciling Items [Member] Number of reportable segments Number of Reportable Segments Number of product groups Number of Product Groups Number of Product Groups Gross profit 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 [Table Text Block] Intrinsic Value of Options Exercised and Weighted Average Grant Date Fair Value of Stock Options Granted [Text Block] Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] 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 Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] Net unrealized (loss) gain on available-for-sale securities Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Defined benefit pension items 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 (loss) Pre-tax reclassifications from “Accumulated other comprehensive income (loss)” Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax