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Employee and Director Stock Plans - Schedule Of Share-based Compensation Options Activity (Detail) $ / shares in Units, shares in Millions, $ in Millions | 12 Months Ended
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Jan. 31, 2016 USD ($) $ / shares shares
Number of Shares |  |
Options outstanding (in shares) | shares | 2.7 |
Granted (in shares) | shares | 0.0 | [1]
Exercised (in shares) | shares | (1.1) |
Canceled/Forfeited (in shares) | shares | 0.0 |
Options outstanding (in shares) | shares | 1.6 |
Options exercisable (in shares) | shares | 1.6 |
Options available for grant (in shares) | shares | 19.6 |
Weighted average price per share |  |
Options outstanding (per share) | $ / shares | $ 34.46 |
Granted (per share) | $ / shares | 0.00 | [1]
Exercised (per share) | $ / shares | 30.88 |
Canceled/Forfeited (per share) | $ / shares | 0.00 |
Options outstanding (per share) | $ / shares | 37.06 |
Options exercisable (per share) | $ / shares | $ 37.06 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] |  |
Options outstanding, Weighted average contractual term | 3 years 8 months 15 days |
Options outstanding, Aggregate Intrinsic Value | $ | $ 15.4 | [2]
Closing stock price (in dollars per share) | $ / shares | $ 46.82 |
[1] | Autodesk did not grant stock options in the twelve months ended January 31, 2016.
[2] | Represents the total pre-tax intrinsic value, based on Autodesk’s closing stock price of $46.82 per share as of January 31, 2016, 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 difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + 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 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 For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. + 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)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price of options that were either forfeited or expired. + 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)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Net number of share options (or share units) granted during the period. + 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)(iv)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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