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Special Items, Net (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Restructuring Cost and Reserve [Line Items] |  |
Mark-to-market adjustments on equity investments, net | $ 46 | $ 0
Debt refinancing and extinguishment | 0 | 15
Nonoperating special items, net | 46 | 15
American Airlines, Inc. |  |
Restructuring Cost and Reserve [Line Items] |  |
Mark-to-market adjustments on equity investments, net | 46 | 0
Debt refinancing and extinguishment | 0 | 15
Nonoperating special items, net | 46 | 15
Mainline operating special items, net |  |
Restructuring Cost and Reserve [Line Items] |  |
Labor contract expenses | 57 | 0
Severance expenses | 13 | 21
Other operating special items, net | 0 | (8)
Operating special items, net | 70 | 13
Mainline operating special items, net | American Airlines, Inc. |  |
Restructuring Cost and Reserve [Line Items] |  |
Labor contract expenses | 57 | 0
Severance expenses | 13 | 21
Other operating special items, net | 0 | (8)
Operating special items, net | $ 70 | $ 13

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