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Employee Stock-based Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Stock-Based Compensation Expense | The Company recorded stock-based compensation expense for the years ended December 31 as follows:
In millions | 2014 |  | 2013 |  | 2012
Stock options | $ | 13 |  |  | $ | 14 |  |  | $ | 15 |
Restricted stock | 33 |  |  | 32 |  |  | 28 |
Employee share repurchase program (compensatory effective 1/1/13) | 4 |  |  | 3 |  |  | — |
Total stock-based compensation before income taxes | 50 |  |  | 49 |  |  | 43 |
Tax benefit | (16 | ) |  | (16 | ) |  | (14 | )
Total stock-based compensation, net of tax | $ | 34 |  |  | $ | 33 |  |  | $ | 29 |
Fair Value of Each Option Award on the Grant Date Using the Black-Scholes Option-Pricing Model | The fair value of each option award on the grant date was estimated using the Black-Scholes option-pricing model with the following assumptions:
| 2014 |  | 2013 |  | 2012
Dividend yield | — | % |  | — | % |  | — | %
Risk-free interest rate | 1.73 | % |  | 1.77 | % |  | 0.87 | %
Expected volatility | 37.8 | % |  | 37.6 | % |  | 35.7 | %
Expected term (years) | 6.3 |  |  | 6.3 |  |  | 6.3 |
The Company's Stock Option Activity | The following table summarizes the Company’s stock option activity for the year ended December 31, 2014:
Shares in thousands | Shares Under Option |  | Weighted- Average Exercise Price per Share |  | Weighted- Average Remaining Contractual Term (in years) |  | Aggregate Intrinsic Value (in millions)
Outstanding at January 1, 2013 | 7,012 |  |  | $ | 33.27 |  |  | 6.3 |  | $ | 100 |
Granted | 921 |  |  | $ | 44.43 |  |  |  |  |
Exercised | (561 | ) |  | $ | 19.02 |  |  |  |  |
Canceled | (36 | ) |  | $ | 41.83 |  |  |  |  |
Forfeited | (99 | ) |  | $ | 50.98 |  |  |  |  |
Outstanding at December 31, 2014 | 7,237 |  |  | $ | 35.50 |  |  | 6.1 |  | $ | 78 |
Fully vested and expected to vest at December 31, 2014 | 7,194 |  |  | $ | 35.44 |  |  | 6.0 |  | $ | 78 |
Exercisable at December 31, 2014 | 5,190 |  |  | $ | 30.63 |  |  | 4.9 |  | $ | 78 |
Total Intrinsic Value of Options Exercised and The Cash Received | The following table summarizes the total intrinsic value of options exercised and the cash received by the Company from option exercises under all share-based payment arrangements at December 31:
In millions | 2014 |  | 2013 |  | 2012
Intrinsic value of options exercised | $ | 14 |  |  | $ | 19 |  |  | $ | 113 |
Cash received from option exercises | $ | 11 |  |  | $ | 9 |  |  | $ | 43 |
Tax benefit realized from option exercises | $ | 5 |  |  | $ | 6 |  |  | $ | 38 |
Restricted Stock and Restricted Stock Unit Activity | The following table reports restricted stock and restricted stock unit activity during the year ended December 31, 2014:
Shares in thousands | Number of Shares |  | Weighted- Average Grant Date Fair Value per Share
Unvested shares at January 1, 2014 | 2,578 |  |  | $ | 50.30 |
Granted | 1,447 |  |  | $ | 44.39 |
Vested | (537 | ) |  | $ | 50.91 |
Forfeited/canceled | (236 | ) |  | $ | 54.17 |
Unvested shares at December 31, 2014 | 3,252 |  |  | $ | 47.18 |
Weighted-Average Fair Value and Total Fair Value of Shares Vested | The following table summarizes the weighted-average fair value of restricted stock units granted for Teradata equity awards and the total fair value of shares vested at December 31:
| 2014 |  | 2013 |  | 2012
Weighted-average fair value of restricted stock units granted | $ | 44.39 |  |  | $ | 48.24 |  |  | $ | 60.71 |
Total fair value of shares vested (in millions) | $ | 27 |  |  | $ | 30 |  |  | $ | 15 |
The Composition of Teradata Restricted Stock Grants | The following table represents the composition of Teradata restricted stock unit grants in 2014:
Shares in thousands | Number of Shares |  | Weighted- Average Grant Date Fair Value
Service-based shares | 1,361 |  |  | $ | 44.28 |
Performance-based shares | 86 |  |  | $ | 46.26 |
Total stock grants | 1,447 |  |  | $ | 44.39 |
Primary Assumptions Used in Valuation of Market Component of Awards | The primary assumptions used in the valuation of the market component of the awards were as follows:
| 2012
Grant date fair value per share of Company common stock | $ | 58.63 |
Expected volatility | 36.44 | %
Risk-free interest rate | 0.47 | %
Dividend yield | — |
Performance vesting hurdle - future fair value per share of Company common stock | $ | 85.00 |
Employee Purchases and Aggregate Cost | Employee purchases and aggregate cost were as follows at December 31:
In millions | 2014 |  | 2013 |  | 2012
Employee share purchases | 0.4 |  |  | 0.4 |  |  | 0.2 |
Aggregate cost | $ | 18 |  |  | $ | 20 |  |  | $ | 12 |

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