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Stock-based Compensation Expense Summary of Restricted Stock Award and Restricted Stock Unit Activity (Details) (USD $)
 3 Months Ended
Apr. 30, 2015
Apr. 30, 2014
Jan. 31, 2015
Jan. 31, 2014
Restricted Stock Units (RSUs) and Performance Shares        
Unvested Restricted Stock Units        
Unvested restricted stock units at January 31, 2015 (shares) 7,801,300us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= adsk_RestrictedStockUnitsRSUsandPerformanceSharesMember		      
Granted (shares) 912,300us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= adsk_RestrictedStockUnitsRSUsandPerformanceSharesMember		      
Vested (shares) (949,200)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
/ us-gaap_AwardTypeAxis
= adsk_RestrictedStockUnitsRSUsandPerformanceSharesMember		      
Canceled/Forfeited (shares) (116,900)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
/ us-gaap_AwardTypeAxis
= adsk_RestrictedStockUnitsRSUsandPerformanceSharesMember		      
Unvested restricted stock units at April 30, 2015 (shares) 7,682,100us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= adsk_RestrictedStockUnitsRSUsandPerformanceSharesMember		      
Weighted average grant date fair value per share        
Unvested restricted stock units at January 31, 2015 (usd per share) $ 48.46us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= adsk_RestrictedStockUnitsRSUsandPerformanceSharesMember		      
Granted (in usd per share) $ 60.96us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= adsk_RestrictedStockUnitsRSUsandPerformanceSharesMember		 $ 49.96us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= adsk_RestrictedStockUnitsRSUsandPerformanceSharesMember		    
Vested (in usd per share) $ 45.43us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= adsk_RestrictedStockUnitsRSUsandPerformanceSharesMember		      
Canceled/Forfeited (in usd per share) $ 46.34us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= adsk_RestrictedStockUnitsRSUsandPerformanceSharesMember		      
Unvested restricted stock units at April 15, 2015 (usd per share) $ 50.58us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= adsk_RestrictedStockUnitsRSUsandPerformanceSharesMember		      
Performance shares units payout 113.80%adsk_PerformanceSharesUnitsPayoutPercentage
/ us-gaap_AwardTypeAxis
= adsk_RestrictedStockUnitsRSUsandPerformanceSharesMember		   65.80%adsk_PerformanceSharesUnitsPayoutPercentage
/ us-gaap_AwardTypeAxis
= adsk_RestrictedStockUnitsRSUsandPerformanceSharesMember		 92.30%adsk_PerformanceSharesUnitsPayoutPercentage
/ us-gaap_AwardTypeAxis
= adsk_RestrictedStockUnitsRSUsandPerformanceSharesMember
Restricted Stock Units (RSUs)        
Unvested Restricted Stock Units        
Granted (shares) 500,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember		      
Unvested restricted stock units at April 30, 2015 (shares) 6,800,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember		      
Performance Stock Unit        
Unvested Restricted Stock Units        
Granted (shares) 400,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember		      
Performance adjustment (shares) 34,600adsk_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember		 [1]      
Unvested restricted stock units at April 30, 2015 (shares) 900,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember		      
Weighted average grant date fair value per share        
Performance adjustment (in usd per share) $ 54.92adsk_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentsWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember		 [1]      
[1] Based on Autodesk's financial results for fiscal 2016, 2015 and 2014 performance period. The performance stock units were earned at 113.8%, 65.8%, and 92.3% of the target award for granted in fiscal 2016, 2015 and 2014, respectively.