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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Share Based Compensation Summary of Financial Statement Components Restricted Stock Units Without Market Conditions | The following table summarizes the components of the Company's stock-based compensation related to its employee RSUs recognized in the Company's consolidated financial statements (in millions):
December 31, |  | 2018 |  | 2017 |  | 2016
RSU expense before income tax |  | $ | 11 |  |  | $ | 17 |  |  | $ | 14 |
Tax benefit |  | (2 | ) |  | (4 | ) |  | (4 | )
RSU expense, net of tax |  | $ | 9 |  |  | $ | 13 |  |  | $ | 10 |
Total value of RSUs converted (1) |  | $ | 10 |  |  | $ | 10 |  |  | $ | 7 |
Total fair value of RSUs vested |  | $ | 16 |  |  | $ | 15 |  |  | $ | 13 |
_____________________________ (1) Amount represents fair market value on the date of conversion.
Schedule of Share Based Compensation Restricted Stock Units Without Market Conditions Activity Table | A summary of the activity of RSUs for the year ended December 31, 2018 follows (RSUs in thousands):
|  | RSUs |  | Weighted Average Grant Date Fair Values |  | Weighted Average Remaining Vesting Term
Nonvested at December 31, 2017 |  | 2,966 |  |  | $ | 11.02 |  |  |
Vested |  | (1,428 | ) |  | 11.05 |  |  |
Forfeited and expired |  | (528 | ) |  | 10.95 |  |  |
Granted |  | 913 |  |  | 10.55 |  |  |
Nonvested at December 31, 2018 |  | 1,923 |  |  | $ | 10.80 |  |  | 1.4
Vested and expected to vest at December 31, 2018 |  | 1,782 |  |  | $ | 10.79 |  |  |
Schedule of Share Based Compensation Restricted Stock Units Without Market Condition Vested And Converted | The following table summarizes the RSUs that vested and were converted during the periods indicated (RSUs in thousands):
Year Ended December 31, |  | 2018 |  | 2017 |  | 2016
RSUs vested during the year |  | 1,428 |  |  | 1,337 |  |  | 1,063 |
RSUs converted during the year, net of shares withheld for taxes |  | 950 |  |  | 865 |  |  | 705 |
Shares withheld for taxes |  | 478 |  |  | 472 |  |  | 358 |

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- Definition Disclosure of restricted stock units without market conditions vested and converted during the year + References No definition available. + Details
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- Definition For restricted stock units without market conditions, disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. Also includes disclosure of the number, aggregate intrinsic value (except for nonpublic entities), and weighted-average remaining contractual term for both restricted stock units outstanding and restricted stock units fully vested and expected to vest at the date of the latest statement of financial position + References No definition available. + Details
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- Definition Summary of the required disclosures representing the effect of restricted stock units without market conditions within the financial statements including pre-tax RSU expense, tax expense (benefit), total value of RSUs converted and total value of RSUs vested + References No definition available. + Details
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