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Special Charges - Schedule of Components of Special Charges (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Operating: |  |  |  |
(Gains) losses on sale of assets and other special charges | $ 36 | $ 46 | $ 49 | $ 60
Labor contract ratification bonuses | 0 | 813 | 0 | 813
Total operating special charges | 36 | 859 | 49 | 873
Nonoperating: |  |  |  |
Nonoperating unrealized (gains) losses on investments, net | 33 | (84) | 70 | (108)
Nonoperating debt extinguishment and modification fees | 0 | 11 | 35 | 11
Total nonoperating special charges and unrealized (gains) losses on investments, net | 33 | (73) | 105 | (97)
Total operating and nonoperating special charges and unrealized (gains) losses on investments, net | 69 | 786 | 154 | 776
Income tax benefit, net of valuation allowance | (8) | (194) | (19) | (197)
Total operating and nonoperating special charges and unrealized (gains) losses on investments, net of income taxes | $ 61 | $ 592 | $ 135 | $ 579

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- Definition Amount of gain (loss) on sale of other assets and other miscellaneous charges. + References No definition available. + Details
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- Definition Total special items in the period. + References No definition available. + Details
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- Definition Amount of restructuring charges, remediation cost, and asset impairment loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
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