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Stock-based Compensation Expense Stock-Based Compensation Expense - Additional Information (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 3 Months Ended 0 Months Ended
Apr. 30, 2015
StockPlans
Apr. 30, 2014
Oct. 31, 2014
Jan. 14, 2014
Jun. 10, 2015
Jan. 31, 2015
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Share based compensation arrangements by share based payment awards, number of active plans (plan) 2adsk_Sharebasedcompensationarrangementsbysharebasedpaymentawardsnumberofactiveplans          
Share based compensation arrangement by share based payment award expired or terminated plans (plan) 3adsk_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpiredOrTerminatedPlans          
Options granted in period 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod [1]          
Nonvested awards, total compensation cost not yet recognized $ 0.1us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized          
Nonvested options outstanding, weighted average remaining contractual term 3 months          
Weighted average grant date fair value per share of stock options granted (in dollars per share) $ 0.0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue [2] $ 0.0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue [2]        
Restricted Stock Units (RSUs) and Performance Shares            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Awards granted in period, weighted average grant date fair value (in usd per share) $ 60.96us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= adsk_RestrictedStockUnitsRSUsandPerformanceSharesMember		 $ 49.96us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= adsk_RestrictedStockUnitsRSUsandPerformanceSharesMember		        
Awards vested in period, fair value 43.1us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
/ us-gaap_AwardTypeAxis
= adsk_RestrictedStockUnitsRSUsandPerformanceSharesMember		 29.4us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
/ us-gaap_AwardTypeAxis
= adsk_RestrictedStockUnitsRSUsandPerformanceSharesMember		        
Awards granted in period 912,300us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= adsk_RestrictedStockUnitsRSUsandPerformanceSharesMember		          
Awards, nonvested, number 7,682,100us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= adsk_RestrictedStockUnitsRSUsandPerformanceSharesMember		         7,801,300us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= adsk_RestrictedStockUnitsRSUsandPerformanceSharesMember
Restricted Stock Units (RSUs)            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Award vesting period 3 years          
Nonvested awards, total compensation cost not yet recognized 236.9us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember		          
Awards granted in period 500,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember		          
Allocated share-based compensation expense 37.8us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember		 22.9us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember		        
Nonvested awards, total compensation cost not yet recognized, period for recognition 1 year 8 months 19 days          
Awards, nonvested, number 6,800,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember		          
Performance Stock Unit            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Nonvested awards, total compensation cost not yet recognized 23.1us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember		          
Awards granted in period 400,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember		          
Allocated share-based compensation expense $ 5.6us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember		 $ 3.0us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember		        
Nonvested awards, total compensation cost not yet recognized, period for recognition 1 year 7 months 6 days          
Awards, nonvested, number 900,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember		          
Performance Stock Unit | Share-based compensation award, tranche one            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
PSU Annual Vesting Percentage 33.33%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheOneMember		          
Performance Stock Unit | Share-based compensation award, tranche two            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
PSU Annual Vesting Percentage 33.33%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheTwoMember		          
Performance Stock Unit | Share-based compensation award, tranche three            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
PSU Annual Vesting Percentage 33.33%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheThreeMember		          
Employee Stock Plan 2012            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Awards, number of additional shares authorized       11,400,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
/ us-gaap_PlanNameAxis
= adsk_EmployeeStockPlan2012Member		    
Awards, number of shares authorized 32,600,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= adsk_EmployeeStockPlan2012Member		          
Stock issued during period, shares, restricted stock award, net of forfeitures     26,600,000us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_PlanNameAxis
= adsk_EmployeeStockPlan2012Member		      
Stock issued during period, shares, share-based compensation, forfeited     6,000,000us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationForfeited
/ us-gaap_PlanNameAxis
= adsk_EmployeeStockPlan2012Member		      
Share-based compensation shares granted to share issued     1.79adsk_ShareBasedCompensationSharesGrantedtoShareIssued
/ us-gaap_PlanNameAxis
= adsk_EmployeeStockPlan2012Member		      
Options granted in period     23,700,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_PlanNameAxis
= adsk_EmployeeStockPlan2012Member		      
Award vesting period     3 years      
Share based compensation arrangement by share based payment award options expiration term (in years)     10 years      
Employee stock plan shares remaining available for issuance 10,800,000adsk_EmployeeStockPlanSharesRemainingAvailableForIssuance
/ us-gaap_PlanNameAxis
= adsk_EmployeeStockPlan2012Member		          
Directors stock plan 2012            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Awards, number of additional shares authorized 900,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
/ us-gaap_PlanNameAxis
= adsk_DirectorsStockPlan2012Member		          
Awards, number of shares authorized 1,700,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= adsk_DirectorsStockPlan2012Member		          
Share-based compensation shares granted to share issued     2.11adsk_ShareBasedCompensationSharesGrantedtoShareIssued
/ us-gaap_PlanNameAxis
= adsk_DirectorsStockPlan2012Member		      
Options granted in period     600,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_PlanNameAxis
= adsk_DirectorsStockPlan2012Member		      
Employee stock plan shares remaining available for issuance 1,200,000adsk_EmployeeStockPlanSharesRemainingAvailableForIssuance
/ us-gaap_PlanNameAxis
= adsk_DirectorsStockPlan2012Member		          
Directors stock plan 2012 | Minimum            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Award vesting period     1 year      
Directors stock plan 2012 | Maximum            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Award vesting period     3 years      
ESP Plan            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Employee stock plan shares remaining available for issuance 39,600,000adsk_EmployeeStockPlanSharesRemainingAvailableForIssuance
/ us-gaap_PlanNameAxis
= adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember		          
Employee stock purchase plan maximum percentage of compensation to purchase shares by eligible participants 15.00%adsk_EmployeeStockPurchasePlanMaximumPercentageOfCompensationToPurchaseSharesByEligibleParticipants
/ us-gaap_PlanNameAxis
= adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember		          
Employee stock purchase plan minimum percentage of common stock fair value defined to purchase shares by eligible participants 85.00%adsk_EmployeeStockPurchasePlanMinimumPercentageOfCommonStockFairValueDefinedToPurchaseSharesByEligibleParticipants
/ us-gaap_PlanNameAxis
= adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember		          
Options, other increases (decreases) in period 10,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOtherIncreasesDecreasesInPeriod
/ us-gaap_PlanNameAxis
= adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember		          
Options, other increases (decreases) in period percentage calculation 2.00%adsk_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOtherIncreasesDecreasesInPeriodPercentageCalculation
/ us-gaap_PlanNameAxis
= adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember		          
Shares issued under employee stock purchase plans 1,100,000us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
/ us-gaap_PlanNameAxis
= adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember		 1,100,000us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
/ us-gaap_PlanNameAxis
= adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember		        
Awards issued, share average price (in usd per share) $ 36.91adsk_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedAveragePrice
/ us-gaap_PlanNameAxis
= adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember		 $ 33.66adsk_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedAveragePrice
/ us-gaap_PlanNameAxis
= adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember		        
Weighted average grant date fair value per share of stock options granted (in dollars per share) $ 15.99us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember		 $ 14.26us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= adsk_EmployeeQualifiedStockPurchasePlan1998EspPlanMember		        
Forecast | Employee Stock Plan 2012            
Compensation Related Costs Share Based Payments Disclosure [Line Items]            
Awards, number of additional shares authorized         12,500,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
/ us-gaap_PlanNameAxis
= adsk_EmployeeStockPlan2012Member
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember		  
[1] Autodesk did not grant stock options in the three months ended April 30, 2015.
[2] The weighted average grant date fair value per share of stock options granted is calculated, as of the stock option grant date, using the Black-Scholes Merton ("BSM") option pricing model. For the three months ended April 30, 2015 and 2014, Autodesk did not grant stock options.