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Stockholders' Equity (Details) (USD $) In Millions, except Per Share data, unless otherwise specified | 12 Months Ended
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Jan. 31, 2015 | Jan. 31, 2014 | Jan. 31, 2013
Stockholders Equity Note [Line Items] |  |  |
Preferred stock, shares authorized | 2.0 us-gaap_PreferredStockSharesAuthorized | 2.0 us-gaap_PreferredStockSharesAuthorized |
Common Stock Repurchase Program |  |  |
Stockholders Equity Note [Line Items] |  |  |
Repurchase and retirement of common shares (in shares) | 6.9 us-gaap_StockRepurchasedAndRetiredDuringPeriodShares / adsk_ShareRepurchasesByProgramAxis = adsk_CommonStockRepurchaseProgramMember | 10.5 us-gaap_StockRepurchasedAndRetiredDuringPeriodShares / adsk_ShareRepurchasesByProgramAxis = adsk_CommonStockRepurchaseProgramMember | 12.5 us-gaap_StockRepurchasedAndRetiredDuringPeriodShares / adsk_ShareRepurchasesByProgramAxis = adsk_CommonStockRepurchaseProgramMember
Average repurchase price per share (usd per share) | $ 53.83 us-gaap_TreasuryStockAcquiredAverageCostPerShare / adsk_ShareRepurchasesByProgramAxis = adsk_CommonStockRepurchaseProgramMember | $ 40.43 us-gaap_TreasuryStockAcquiredAverageCostPerShare / adsk_ShareRepurchasesByProgramAxis = adsk_CommonStockRepurchaseProgramMember | $ 34.50 us-gaap_TreasuryStockAcquiredAverageCostPerShare / adsk_ShareRepurchasesByProgramAxis = adsk_CommonStockRepurchaseProgramMember
Common Stock shares remained available for repurchase under repurchase plans | 14.8 us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased / adsk_ShareRepurchasesByProgramAxis = adsk_CommonStockRepurchaseProgramMember |  |

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- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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- Definition Number of shares that have been repurchased and retired during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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