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Earnings (Loss) Per Share (Tables) | 9 Months Ended
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Sep. 30, 2020
Earnings Per Share [Abstract] |
Computation of Basic and Diluted Earnings Per Share | The computations of UAL's basic and diluted earnings (loss) per share are set forth below (in millions, except per share amounts):
| Three Months Ended September 30, |  |  |  | Nine Months Ended September 30, |  |
| 2020 |  | 2019 |  | 2020 |  | 2019
Earnings (loss) available to common stockholders | $ | (1,841) |  |  | $ | 1,024 |  |  | $ | (5,172) |  |  | $ | 2,368 |
Basic weighted-average shares outstanding | 291.0 |  |  | 255.3 |  |  | 273.5 |  |  | 261.0 |
Effect of employee stock awards and warrants (a) | — |  |  | 1.1 |  |  | — |  |  | 1.0 |
Diluted weighted-average shares outstanding | 291.0 |  |  | 256.4 |  |  | 273.5 |  |  | 262.0 |
Earnings (loss) per share, basic | $ | (6.33) |  |  | $ | 4.01 |  |  | $ | (18.91) |  |  | $ | 9.07 |
Earnings (loss) per share, diluted | $ | (6.33) |  |  | $ | 3.99 |  |  | $ | (18.91) |  |  | $ | 9.04 |
(a) Antidilutive common stock equivalents excluded from the diluted per share calculation are not material.

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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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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