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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 |
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Jan. 31, 2015 | Jan. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Options Vested and Exercisable, Number of Shares | 2.5 us-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 | $ 33.72 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice |  |
Options Vested and Exercisable, Aggregate intrinsic value | $ 49.9 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue | [1] |
Options Outstanding, Number of Shares | 2.7 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber |  | 5.9 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Options Outstanding, Weighted average contractual life (in years) | 4 years 2 months 12 days |  |
Options Outstanding, Weighted average exercise price | $ 34.46 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice |  | $ 33.54 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Options Outstanding, Aggregate Intrinsic Value | $ 53.1 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue | [1] |
Closing stock price (in dollars per share) | $ 54.01 us-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 | $ 12.31 adsk_Sharebasedcompensationsharesauthorizedunderstockoptionplansexercisepricerangelowerlimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = adsk_Range1Member |  |
Range of per-share exercise prices, Upper Limit | $ 29.49 adsk_Sharebasedcompensationsharesauthorizedunderstockoptionplansexercisepricerangeupperlimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = adsk_Range1Member |  |
Options Vested and Exercisable, Number of Shares | 0.9 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = adsk_Range1Member |  |
Options Vested and Exercisable, Weighted average exercise price | $ 23.76 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = adsk_Range1Member |  |
Options Outstanding, Number of Shares | 0.9 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = adsk_Range1Member |  |
Options Outstanding, Weighted average exercise price | $ 23.83 us-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 | $ 29.50 adsk_Sharebasedcompensationsharesauthorizedunderstockoptionplansexercisepricerangelowerlimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = adsk_Range2Member |  |
Range of per-share exercise prices, Upper Limit | $ 41.62 adsk_Sharebasedcompensationsharesauthorizedunderstockoptionplansexercisepricerangeupperlimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = adsk_Range2Member |  |
Options Vested and Exercisable, Number of Shares | 1.2 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = adsk_Range2Member |  |
Options Vested and Exercisable, Weighted average exercise price | $ 38.73 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = adsk_Range2Member |  |
Options Outstanding, Number of Shares | 1.3 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = adsk_Range2Member |  |
Options Outstanding, Weighted average exercise price | $ 38.85 us-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 | $ 42.39 adsk_Sharebasedcompensationsharesauthorizedunderstockoptionplansexercisepricerangelowerlimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = adsk_Range3Member |  |
Range of per-share exercise prices, Upper Limit | $ 43.81 adsk_Sharebasedcompensationsharesauthorizedunderstockoptionplansexercisepricerangeupperlimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = adsk_Range3Member |  |
Options Vested and Exercisable, Number of Shares | 0.4 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = adsk_Range3Member |  |
Options Vested and Exercisable, Weighted average exercise price | $ 43.80 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = adsk_Range3Member |  |
Options Outstanding, Number of Shares | 0.5 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = adsk_Range3Member |  |
Options Outstanding, Weighted average exercise price | $ 43.79 us-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.

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + 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 (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + 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 (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + 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 (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for option awards outstanding, 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 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of fully vested and expected to vest options that are exercisable. + 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 (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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