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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 | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Earnings (loss) available to common stockholders | $ 1,075 | $ 329 |  | $ (1,048)
Basic weighted-average shares outstanding(in shares) | 328.0 | 326.7 | 327.7 | 325.9
Dilutive effect of employee stock awards (in shares) | 1.2 | 1.7 | 1.5 | 0.0
Dilutive effect of stock warrants (in shares) | 2.3 | 1.9 | 2.3 | 0.0
Diluted weighted-average shares outstanding (in shares) | 331.5 | 330.3 | 331.5 | 325.9
Earnings (loss) per share, basic (in dollars per share) | $ 3.28 | $ 1.01 | $ 2.69 | $ (3.22)
Earnings (loss) per share, diluted (in dollars per share) | $ 3.24 | $ 1.00 | $ 2.66 | $ (3.22)
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] |  |  |  |
Warrant 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] |  |  |  |
Warrant exercise price (in dollars per share) | $ 53.92 |  | $ 53.92 |
Stock warrants |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Potentially dilutive securities (in shares) | 1.5 | 1.5 | 1.5 | 1.5
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

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