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Special Charges (Credits) (Tables) | 3 Months Ended
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Mar. 31, 2022
Other Income and Expenses [Abstract] |
Components of Special Charges | For the three months ended March 31, operating and nonoperating special charges (credits) and unrealized (gains) losses on investments in the statements of consolidated operations consisted of the following (in millions):
| Three Months Ended March 31, |  |
| 2022 |  | 2021 |  |  |  |
CARES Act grant | $ | — |  |  | $ | (1,810) |  |  |  |  |
Severance and benefit costs | — |  |  | 417 |  |  |  |  |
(Gains) losses on sale of assets and other special charges | (8) |  |  | 16 |  |  |  |  |
Total operating special charges (credits) | (8) |  |  | (1,377) |  |  |  |  |
Nonoperating unrealized losses on investments, net | — |  |  | 22 |  |  |  |  |
Nonoperating debt extinguishment fees | 7 |  |  | — |  |  |  |  |
Nonoperating special termination benefits | — |  |  | 46 |  |  |  |  |
Total nonoperating special charges and unrealized losses on investments, net | 7 |  |  | 68 |  |  |  |  |
Total operating and nonoperating special charges (credits) and unrealized losses on investments, net | (1) |  |  | (1,309) |  |  |  |  |
Income tax expense, net of valuation allowance | — |  |  | 291 |  |  |  |  |
Total operating and nonoperating special charges (credits) and unrealized losses on investments, net of income taxes | $ | (1) |  |  | $ | (1,018) |  |  |  |  |

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