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Earnings (Loss) Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Earnings Per Share [Abstract] |  |  |  |
Earnings (loss) available to common stockholders | $ 942 | $ 473 | $ (106) | $ (1,318)
Basic weighted-average shares outstanding (in shares) | 326.8 | 323.7 | 326.2 | 321.3
Dilutive effect of employee stock awards (in shares) | 1.7 | 3.0 | 0.0 | 0.0
Dilutive effect of stock warrants (in shares) | 1.0 | 2.3 | 0.0 | 0.0
Diluted weighted-average shares outstanding(in shares) | 329.5 | 329.0 | 326.2 | 321.3
Earnings (loss) per share, basic (in dollars per share) | $ 2.88 | $ 1.46 | $ (0.33) | $ (4.10)
Earnings (loss) per share, diluted ( in dollars per share) | $ 2.86 | $ 1.44 | $ (0.33) | $ (4.10)
Stock warrants |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Potentially dilutive securities (in shares) | 3.5 | 1.5 | 3.5 | 0.7
Employee stock awards |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Potentially dilutive securities (in shares) | 0.7 | 0.7 | 0.7 | 0.7
CARES Act Loan Warrants |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Warrants to purchase securities (in shares) | 10.0 |  | 10.0 |
CARES Act Loan Warrants | Minimum |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Exercise price (in dollars per share) | $ 31.50 |  | $ 31.50 |
CARES Act Loan Warrants | Maximum |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Exercise price (in dollars per share) | $ 53.92 |  | $ 53.92 |

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