XML 18 R48.htm IDEA: XBRL DOCUMENT v2.4.1.9
Business and Summary of Significant Accounting Policies - Assumption Used to Estimate the Fair Value of Stock-Based Awards (Details)
 12 Months Ended
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.