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Share-Based Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Information Related to Share-Based Compensation Plan Cost | The following table provides information related to UAL's share-based compensation plan cost for the years ended December 31 (in millions):
|  | 2018 |  | 2017 |  | 2016
Compensation cost: |  |  |  |  |  |
RSUs |  | $ | 98 |  |  | $ | 63 |  |  | $ | 58 |
Restricted stock |  | 2 |  |  | 8 |  |  | 11 |
Stock options |  | 1 |  |  | 2 |  |  | 1 |
Total |  | $ | 101 |  |  | $ | 73 |  |  | $ | 70 |
Summary of Unearned Compensation and Weighted-Average Remaining Period to Recognize Costs | The table below summarizes UAL's unearned compensation and weighted-average remaining period to recognize costs for all outstanding share-based awards that are probable of being achieved as of December 31, 2018 (in millions, except as noted):
|  | Unearned Compensation |  | Weighted- Average Remaining Period (in years)
RSUs |  | $ | 66 |  |  | 1.6
Stock options |  | 2 |  |  | 2.6
Total |  | $ | 68 |  |  |
Summary of RSU and Restricted Stock Activity | The table below summarizes UAL's RSUs and restricted stock activity for the years ended December 31 (shares in millions):
|  | Liability Awards |  | Equity Awards
|  | RSUs |  | RSUs |  | Weighted- Average Grant Price |  | Restricted Stock |  | Weighted- Average Grant Price
Outstanding at December 31, 2015 |  | 2.6 |  |  | — |  |  | $ | — |  |  | 0.3 |  |  | $ | 48.68 |
Granted |  | 1.0 |  |  | 0.9 |  |  | 51.60 |  |  | 0.4 |  |  | 50.63 |
Vested |  | (1.4 | ) |  | — |  |  | — |  |  | (0.1 | ) |  | 41.47 |
Forfeited |  | (0.1 | ) |  | (0.1 | ) |  | 50.57 |  |  | (0.1 | ) |  | 53.42 |
Outstanding at December 31, 2016 |  | 2.1 |  |  | 0.8 |  |  | 51.67 |  |  | 0.5 |  |  | 52.00 |
Granted |  | 0.6 |  |  | 1.0 |  |  | 71.68 |  |  | — |  |  | — |
Vested |  | (0.7 | ) |  | (0.3 | ) |  | 51.81 |  |  | (0.2 | ) |  | 51.60 |
Forfeited |  | (0.2 | ) |  | (0.1 | ) |  | 57.49 |  |  | — |  |  | — |
Outstanding at December 31, 2017 |  | 1.8 |  |  | 1.4 |  |  | 63.99 |  |  | 0.3 |  |  | 52.30 |
Granted |  | 0.7 |  |  | 1.1 |  |  | 67.74 |  |  | — |  |  | — |
Vested |  | (0.5 | ) |  | (0.5 | ) |  | 63.02 |  |  | (0.2 | ) |  | 53.24 |
Forfeited |  | (0.1 | ) |  | (0.2 | ) |  | 67.34 |  |  | — |  |  | — |
Outstanding at December 31, 2018 |  | 1.9 |  |  | 1.8 |  |  | 66.29 |  |  | 0.1 |  |  | 51.17 |

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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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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- Definition Tabular disclosure of the total compensation cost related to nonvested awards not yet recognized and the weighted-average period over which it is expected to be recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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