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Stock Based Compensation (Tables) | 12 Months Ended
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Feb. 03, 2018
Components of Stock Based Compensation Expense | Stock-based compensation expense included the following components:
| 2017 |  | 2016 |  | 2015
| (millions)
Stock options | $ | 34 |  |  | $ | 43 |  |  | $ | 52 |
Restricted stock units | 24 |  |  | 18 |  |  | 13 |
| $ | 58 |  |  | $ | 61 |  |  | $ | 65 |
Weighted Average Assumption Used To Estimate Fair Value of Stock Options | The fair value of stock options granted during 2017, 2016 and 2015 and the weighted average assumptions used to estimate the fair value are as follows:
| 2017 |  | 2016 |  | 2015
Weighted average grant date fair value of stock options granted during the period | $ | 5.84 |  |  | $ | 12.14 |  |  | $ | 20.78 |
Dividend yield | 6.2 | % |  | 3.8 | % |  | 2.7 | %
Expected volatility | 41.8 | % |  | 42.7 | % |  | 43.3 | %
Risk-free interest rate | 1.9 | % |  | 1.4 | % |  | 1.7 | %
Expected life | 5.7 years |  |  | 5.7 years |  |  | 5.7 years |
Schedule of Stock Option Activity | Activity related to stock options for 2017 is as follows:
| Shares |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Life |  | Aggregate Intrinsic Value
| (thousands) |  |  |  | (years) |  | (millions)
Outstanding, beginning of period | 20,478 |  |  | $ | 42.18 |  |  |  |  |
Granted | 3,801 |  |  | $ | 26.12 |  |  |  |  |
Canceled or forfeited | (3,586 | ) |  | $ | 46.46 |  |  |  |  |
Exercised | (317 | ) |  | $ | 19.09 |  |  |  |  |
Outstanding, end of period | 20,376 |  |  | $ | 38.80 |  |  |  |  |
Exercisable, end of period | 12,810 |  |  | $ | 38.38 |  |  | 4.3 |  | $ | 23 |
Options expected to vest | 6,305 |  |  | $ | 38.57 |  |  | 8.4 |  | $ | 4 |
Additional Information Relating to Stock Options | Additional information relating to stock options is as follows:
| 2017 |  | 2016 |  | 2015
| (millions)
Intrinsic value of options exercised | $ | 3 |  |  | $ | 12 |  |  | $ | 127 |
Cash received from stock options exercised | 6 |  |  | 35 |  |  | 125 |
Restricted Stock Units [Member] |
Activity Related to Restricted Stock and Restricted Stock Units | The weighted average grant date fair values of performance-based and time-based restricted stock units granted during 2017, 2016 and 2015 are as follows:
| 2017 |  | 2016 |  | 2015
Restricted stock units (performance-based) | $ | 27.16 |  |  | $ | 43.72 |  |  | $ | 61.51 |
Restricted stock units (time-based) | 20.75 |  |  | 35.61 |  |  | 63.71 |
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] | Activity related to restricted stock units for 2017 is as follows:
| Shares |  | Weighted Average Grant Date Fair Value
| (thousands) |  |
Nonvested, beginning of period | 1,818 |  |  | $ | 49.04 |
Granted – performance-based | 971 |  |  | 27.16 |
Performance adjustment | (312 | ) |  | 61.51 |
Granted – time-based | 1,307 |  |  | 20.75 |
Forfeited | (431 | ) |  | 40.14 |
Vested | (196 | ) |  | 50.32 |
Nonvested, end of period | 3,157 |  |  | $ | 30.51 |

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