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Business and Summary of Significant Accounting Policies - Assumption Used to Estimate the Fair Value of Stock-Based Awards (Details) | 12 Months Ended
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Jan. 31, 2015 | Jan. 31, 2014 | Jan. 31, 2013
Performance Stock Unit |  |  |  |  |  |
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items] |  |  |  |  |  |
Range of expected volatilities | 30.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_PlanNameAxis = adsk_PerformanceStockUnitMember | [1] |  |  |  |
Expected dividends | 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate / us-gaap_PlanNameAxis = adsk_PerformanceStockUnitMember | [1] |  |  |  |
Range of risk-free interest rates | 0.10%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate / us-gaap_PlanNameAxis = adsk_PerformanceStockUnitMember | [1] |  |  |  |
Employee Qualified Stock Purchase Plan 1998 ESP Plan |  |  |  |  |  |
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items] |  |  |  |  |  |
Expected dividends | 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate / us-gaap_PlanNameAxis = adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember |  | 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate / us-gaap_PlanNameAxis = adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember |  | 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate / us-gaap_PlanNameAxis = adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember |
Employee Qualified Stock Purchase Plan 1998 ESP Plan | Minimum |  |  |  |  |  |
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items] |  |  |  |  |  |
Range of expected volatilities | 29.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_PlanNameAxis = adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  | 27.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_PlanNameAxis = adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  | 41.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_PlanNameAxis = adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
Range of expected lives | 2 years |  | 2 years |  | 2 years |
Range of risk-free interest rates | 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate / us-gaap_PlanNameAxis = adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  | 0.10%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate / us-gaap_PlanNameAxis = adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  | 0.10%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate / us-gaap_PlanNameAxis = adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
Employee Qualified Stock Purchase Plan 1998 ESP Plan | Maximum |  |  |  |  |  |
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items] |  |  |  |  |  |
Range of expected volatilities | 33.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_PlanNameAxis = adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  | 36.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_PlanNameAxis = adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  | 44.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_PlanNameAxis = adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
Range of expected lives | 6 months |  | 6 months |  | 6 months |
Range of risk-free interest rates | 0.60%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate / us-gaap_PlanNameAxis = adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  | 0.40%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate / us-gaap_PlanNameAxis = adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  | 0.30%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate / us-gaap_PlanNameAxis = adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
Stock Options Plan |  |  |  |  |  |
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items] |  |  |  |  |  |
Range of expected volatilities |  |  | 34.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_PlanNameAxis = adsk_StockOptionsPlanMember | [1] |  |
Expected dividends |  |  | 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate / us-gaap_PlanNameAxis = adsk_StockOptionsPlanMember | [1] | 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate / us-gaap_PlanNameAxis = adsk_StockOptionsPlanMember | [2]
Range of risk-free interest rates |  |  | 0.10%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate / us-gaap_PlanNameAxis = adsk_StockOptionsPlanMember | [1] |  |
Stock Options Plan | Minimum |  |  |  |  |  |
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items] |  |  |  |  |  |
Range of expected volatilities |  |  |  |  | 41.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_PlanNameAxis = adsk_StockOptionsPlanMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [2]
Range of expected lives |  |  |  |  | 4 years 7 months 6 days | [2]
Range of risk-free interest rates |  |  |  |  | 0.50%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate / us-gaap_PlanNameAxis = adsk_StockOptionsPlanMember / us-gaap_RangeAxis = us-gaap_MinimumMember | [2]
Stock Options Plan | Maximum |  |  |  |  |  |
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items] |  |  |  |  |  |
Range of expected volatilities |  |  |  |  | 45.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_PlanNameAxis = adsk_StockOptionsPlanMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [2]
Range of expected lives |  |  |  |  | 3 years 7 months 6 days | [2]
Range of risk-free interest rates |  |  |  |  | 0.80%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate / us-gaap_PlanNameAxis = adsk_StockOptionsPlanMember / us-gaap_RangeAxis = us-gaap_MaximumMember | [2]
[1] | Autodesk did not grant PSUs in fiscal 2013 that were subject to market conditions.
[2] | Autodesk did not grant stock options in fiscal 2015 or 2014.

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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.D.2) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section D -Subsection 2 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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