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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2018
Earnings Per Share [Abstract] |
Computation of Earnings Per Share | The computations of UAL's basic and diluted earnings per share are set forth below (in millions, except per share amounts):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Earnings available to common stockholders | $ | 836 |  |  | $ | 645 |  |  | $ | 1,667 |  |  | $ | 1,565 |
Basic weighted-average shares outstanding | 272.4 |  |  | 299.8 |  |  | 277.0 |  |  | 306.8 |
Effect of employee stock awards | 1.2 |  |  | 0.8 |  |  | 1.0 |  |  | 0.8 |
Diluted weighted-average shares outstanding | 273.6 |  |  | 300.6 |  |  | 278.0 |  |  | 307.6 |
Earnings per share, basic | $ | 3.07 |  |  | $ | 2.15 |  |  | $ | 6.02 |  |  | $ | 5.10 |
Earnings per share, diluted | $ | 3.06 |  |  | $ | 2.15 |  |  | $ | 5.99 |  |  | $ | 5.09 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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