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Stock-based Compensation Expense (Tables) | 6 Months Ended
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Jul. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity | A summary of restricted stock unit activity for the six months ended July 31, 2016 is as follows:
| Unvested Restricted Stock Units |  | Weighted average grant date fair value per share
| (in thousands) |  |
Unvested restricted stock units at January 31, 2016 | 7,739.6 |  |  | $ | 51.80 |
Granted | 1,538.8 |  |  | 57.60 |
Vested | (1,008.0 | ) |  | 56.00 |
Canceled/Forfeited | (475.7 | ) |  | 51.70 |
Performance Adjustment (1) | (29.7 | ) |  | 63.81 |
Unvested restricted stock units at July 31, 2016 | 7,765.0 |  |  | $ | 52.66 |
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(1) | Based on Autodesk's financial results and relative total stockholder return for the fiscal 2016 performance period. The performance stock units were attained at rates ranging from 86.1% to 98.0% of the target award.
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs | The following table summarizes stock-based compensation expense for the three and six months ended July 31, 2016 and 2015, respectively, as follows:
| Three Months Ended July 31,
| 2016 |  | 2015
Cost of subscription | $ | 1.7 |  |  | $ | 1.2 |
Cost of license and other revenue | 1.7 |  |  | 1.2 |
Marketing and sales | 23.3 |  |  | 17.3 |
Research and development | 20.2 |  |  | 14.8 |
General and administrative | 7.4 |  |  | 6.2 |
Stock-based compensation expense related to stock awards and ESPP purchases | 54.3 |  |  | 40.7 |
Tax benefit | — |  |  | (10.5 | )
Stock-based compensation expense related to stock awards and ESPP purchases, net of tax | $ | 54.3 |  |  | $ | 30.2 |
| Six Months Ended July 31,
| 2016 |  | 2015
Cost of subscription | $ | 3.5 |  |  | $ | 2.6 |
Cost of license and other revenue | 3.3 |  |  | 2.7 |
Marketing and sales | 44.8 |  |  | 39.0 |
Research and development | 39.1 |  |  | 32.4 |
General and administrative | 15.2 |  |  | 14.2 |
Stock-based compensation expense related to stock awards and ESPP purchases | 105.9 |  |  | 90.9 |
Tax benefit | — |  |  | (24.5 | )
Stock-based compensation expense related to stock awards and ESPP purchases, net of tax | $ | 105.9 |  |  | $ | 66.4 |
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award | Autodesk uses the following assumptions to estimate the fair value of stock-based awards:
| Six Months Ended July 31, 2016 |  | Six Months Ended July 31, 2015
| Performance Stock Unit |  | ESPP |  | Performance Stock Unit |  | ESPP
Range of expected volatilities | 38.4 - 38.6% |  | 35.0 - 40.2% |  | 27.3% |  | 27.7 - 28.2%
Range of expected lives (in years) | N/A |  | 0.5 - 2.0 |  | N/A |  | 0.5 - 2.0
Expected dividends | —% |  | —% |  | —% |  | —%
Range of risk-free interest rates | 0.6 - 0.7% |  | 0.5 - 0.9% |  | 0.2% |  | 0.1 - 0.6%

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- Definition Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate. + 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 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + 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 (h)(1) -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 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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