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Stock-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2016
Share-based Compensation [Abstract] |
Summary Of Changes in Restricted Stock And Restricted Stock Units | The following table summarizes the changes in the number of outstanding restricted stock units for the nine months ended September 30, 2016 (shares in millions):
| Restricted Stock Units |  | Weighted- Average Grant Date Fair Value
Outstanding at December 31, 2015 | 2.9 |  |  | $ | 34 |
Granted | 2.6 |  |  | 55 |
Vested | (1.0 | ) |  | 27 |
Forfeited | (0.2 | ) |  | 44 |
Outstanding at September 30, 2016 | 4.3 |  |  | $ | 48 |

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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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- References No definition available. + Details
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