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Stock-based Compensation Expense (Tables) | 3 Months Ended
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Apr. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Share-based Compensation, Stock Options, Activity | A summary of stock option activity for the three months ended April 30, 2015 is as follows:
| Number of Shares |  | Weighted average exercise price per share |  | Weighted average remaining contractual term |  | Aggregate Intrinsic Value (3)
| (in millions) |  |  |  | (in years) |  | (in millions)
Options outstanding at January 31, 2015 | 2.7 |  |  | $ | 34.46 |  |  |  |  |
Granted (1) | — |  |  | — |  |  |  |  |
Exercised | (0.5 | ) |  | 33.25 |  |  |  |  |
Canceled/Forfeited | — |  |  | — |  |  |  |  |
Options outstanding at April 30, 2015 | 2.2 |  |  | $ | 34.73 |  |  | 4.1 |  | $ | 49.3 |
Options vested and exercisable at April 30, 2015 | 2.2 |  |  | $ | 34.77 |  |  | 4.1 |  | $ | 48.8 |
Options vested as of April 30, 2015 and expected to vest thereafter (2) | 2.2 |  |  | $ | 34.73 |  |  | 4.1 |  | $ | 49.3 |
Options available for grant at April 30, 2015 | 12.0 |  |  |  |  |  |  |
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(1) | Autodesk did not grant stock options in the three months ended April 30, 2015.
(2) | Options expected to vest reflect an estimated forfeiture rate.
(3) | Represents the total pre-tax intrinsic value, based on Autodesk’s closing stock price of $56.83 per share as of April 30, 2015, which would have been received by the option holders had all option holders exercised their options as of that date.
Intrinsic Value of Options Exercised and Weighted Average Grant Date Fair Value of Stock Options Granted | The following table summarizes information about the pre-tax intrinsic value of options exercised and the weighted average grant date fair value per share of options granted during the three months ended April 30, 2015 and 2014:
| Three Months Ended
| April 30, 2015 |  | April 30, 2014
Pre-tax intrinsic value of options exercised (1) | $ | 13.8 |  |  | $ | 22.8 |
Weighted average grant date fair value per share of stock options granted (2) | $ | — |  |  | $ | — |
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(1) | The intrinsic value of options exercised is calculated as the difference between the exercise price of the option and the market value of the stock on the date of exercise.
(2) | The weighted average grant date fair value per share of stock options granted is calculated, as of the stock option grant date, using the Black-Scholes Merton ("BSM") option pricing model. For the three months ended April 30, 2015 and 2014, Autodesk did not grant stock options.
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range | The following table summarizes information about options outstanding and exercisable at April 30, 2015:
| Options Vested and Exercisable |  | Options Outstanding
| Number of Shares (in millions) |  | Weighted average contractual life (in years) |  | Weighted average exercise price |  | Aggregate intrinsic value (1) (in millions) |  | Number of Shares (in millions) |  | Weighted average contractual life (in years) |  | Weighted average exercise price |  | Aggregate intrinsic value (1) (in millions)
Range of per-share exercise prices: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
$12.31 - $29.49 | 0.8 |  |  |  |  | $ | 23.83 |  |  |  |  | 0.8 |  |  |  |  | $ | 23.91 |  |  |
$29.50 - $41.62 | 0.9 |  |  |  |  | 39.36 |  |  |  |  | 0.9 |  |  |  |  | 39.35 |  |  |
$42.39 - $43.81 | 0.5 |  |  |  |  | 43.79 |  |  |  |  | 0.5 |  |  |  |  | 43.79 |  |  |
| 2.2 |  |  | 4.1 |  | $ | 34.77 |  |  | $ | 48.8 |  |  | 2.2 |  |  | 4.1 |  | $ | 34.73 |  |  | $ | 49.3 |
_______________
(1) | Represents the total pre-tax intrinsic value, based on Autodesk’s closing stock price of $56.83 per share as of April 30, 2015, which would have been received by the option holders had all option holders exercised their options as of that date.
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity | A summary of restricted stock unit activity for the three months ended April 30, 2015 is as follows:
| Unvested Restricted Stock Units |  | Weighted average grant date fair value per share
| (in thousands) |  |
Unvested restricted stock units at January 31, 2015 | 7,801.3 |  |  | $ | 48.46 |
Granted | 912.3 |  |  | 60.96 |
Vested | (949.2 | ) |  | 45.43 |
Canceled/Forfeited | (116.9 | ) |  | 46.34 |
Performance Adjustment (1) | 34.6 |  |  | 54.92 |
Unvested restricted stock units at April 30, 2015 | 7,682.1 |  |  | $ | 50.58 |
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(1) | Based on Autodesk's financial results for fiscal 2016, 2015 and 2014 performance period. The performance stock units were earned at 113.8%, 65.8%, and 92.3% of the target award for granted in fiscal 2016, 2015 and 2014, respectively.
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs | The following table summarizes stock-based compensation expense for the three months ended April 30, 2015 and 2014, respectively, as follows:
| Three Months Ended April 30, 2015 |  | Three Months Ended April 30, 2014
Cost of license and other revenue | $ | 1.5 |  |  | $ | 0.9 |
Cost of subscription | 1.4 |  |  | 0.8 |
Marketing and sales | 21.7 |  |  | 14.0 |
Research and development | 17.6 |  |  | 10.9 |
General and administrative | 8.0 |  |  | 7.0 |
Stock-based compensation expense related to stock awards and ESPP purchases | 50.2 |  |  | 33.6 |
Tax benefit | (14.0 | ) |  | (9.2 | )
Stock-based compensation expense related to stock awards and ESPP purchases, net of tax | $ | 36.2 |  |  | $ | 24.4 |
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:
| Three Months Ended April 30, 2015 |  | Three Months Ended April 30, 2014
|  | Performance Stock Unit |  | ESPP |  | Performance Stock Unit |  | ESPP
Range of expected volatilities |  | 27% |  | 27.7 - 28.2% |  | 30% |  | 30 - 33%
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 |  | 0.2% |  | 0.1 - 0.6% |  | 0.1% |  | 0.1 - 0.4%

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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 option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + 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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