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Employee and Director Stock Plans - Options Outstanding and Exercisable (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified
 12 Months Ended
Jan. 31, 2015
Jan. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Options Vested and Exercisable, Number of Shares 2.5us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber  
Options Vested and Exercisable, Weighted average contractual life (in years) 3 years 10 months 24 days  
Options Vested and Exercisable, Weighted average exercise price $ 33.72us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice  
Options Vested and Exercisable, Aggregate intrinsic value $ 49.9us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue [1]  
Options Outstanding, Number of Shares 2.7us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber 5.9us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Options Outstanding, Weighted average contractual life (in years) 4 years 2 months 12 days  
Options Outstanding, Weighted average exercise price $ 34.46us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice $ 33.54us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Options Outstanding, Aggregate Intrinsic Value $ 53.1us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue [1]  
Closing stock price (in dollars per share) $ 54.01us-gaap_SaleOfStockPricePerShare  
$12.31 - $29.49    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Range of per-share exercise prices, Lower Limit $ 12.31adsk_Sharebasedcompensationsharesauthorizedunderstockoptionplansexercisepricerangelowerlimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= adsk_Range1Member		  
Range of per-share exercise prices, Upper Limit $ 29.49adsk_Sharebasedcompensationsharesauthorizedunderstockoptionplansexercisepricerangeupperlimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= adsk_Range1Member		  
Options Vested and Exercisable, Number of Shares 0.9us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= adsk_Range1Member		  
Options Vested and Exercisable, Weighted average exercise price $ 23.76us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= adsk_Range1Member		  
Options Outstanding, Number of Shares 0.9us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= adsk_Range1Member		  
Options Outstanding, Weighted average exercise price $ 23.83us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= adsk_Range1Member		  
$29.50 - $41.62    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Range of per-share exercise prices, Lower Limit $ 29.50adsk_Sharebasedcompensationsharesauthorizedunderstockoptionplansexercisepricerangelowerlimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= adsk_Range2Member		  
Range of per-share exercise prices, Upper Limit $ 41.62adsk_Sharebasedcompensationsharesauthorizedunderstockoptionplansexercisepricerangeupperlimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= adsk_Range2Member		  
Options Vested and Exercisable, Number of Shares 1.2us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= adsk_Range2Member		  
Options Vested and Exercisable, Weighted average exercise price $ 38.73us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= adsk_Range2Member		  
Options Outstanding, Number of Shares 1.3us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= adsk_Range2Member		  
Options Outstanding, Weighted average exercise price $ 38.85us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= adsk_Range2Member		  
$42.39 - $43.81    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Range of per-share exercise prices, Lower Limit $ 42.39adsk_Sharebasedcompensationsharesauthorizedunderstockoptionplansexercisepricerangelowerlimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= adsk_Range3Member		  
Range of per-share exercise prices, Upper Limit $ 43.81adsk_Sharebasedcompensationsharesauthorizedunderstockoptionplansexercisepricerangeupperlimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= adsk_Range3Member		  
Options Vested and Exercisable, Number of Shares 0.4us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= adsk_Range3Member		  
Options Vested and Exercisable, Weighted average exercise price $ 43.80us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= adsk_Range3Member		  
Options Outstanding, Number of Shares 0.5us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= adsk_Range3Member		  
Options Outstanding, Weighted average exercise price $ 43.79us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= adsk_Range3Member		  
[1] Represents the total pre-tax intrinsic value, based on Autodesk’s closing stock price of $54.01 per share as of January 31, 2015, which would have been received by the option holders had all option holders exercised their options as of that date.