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Earnings (Loss) Per Share | 12 Months Ended
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Dec. 31, 2021
Earnings Per Share [Abstract] |
Common Stockholders' Equity and Preferred Securities | EARNINGS (LOSS) PER SHAREThe computations of UAL's basic and diluted earnings (loss) per share are set forth below for the years ended December 31 (in millions, except per share amounts):
|  | 2021 |  | 2020 |  | 2019
Earnings (loss) available to common stockholders |  | $ | (1,964) |  |  | $ | (7,069) |  |  | $ | 3,009 |
Basic weighted-average shares outstanding |  | 321.9 |  |  | 279.4 |  |  | 258.8 |
Dilutive effect of employee stock awards |  | — |  |  | — |  |  | 1.1 |
Diluted weighted-average shares outstanding |  | 321.9 |  |  | 279.4 |  |  | 259.9 |
Earnings (loss) per share, basic |  | $ | (6.10) |  |  | $ | (25.30) |  |  | $ | 11.63 |
Earnings (loss) per share, diluted |  | $ | (6.10) |  |  | $ | (25.30) |  |  | $ | 11.58 |
Potentially dilutive securities (a) |  |  |  |  |  |
Stock warrants |  | 0.9 |  |  | — |  |  | — |
Employee stock awards |  | 0.7 |  |  | 1.0 |  |  | 0.1 |
(a) Weighted-average potentially dilutive securities outstanding excluded from the computation of diluted earnings per share because the securities would have had an antidilutive effect.

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