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Transactions with Related Parties - Net Receivables (Payables) to Related Parties (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Related Party Transaction [Line Items] |  |  |
Accounts payable | $ (2,353) | $ (2,149) |
Regional expenses | 4,643 | 4,385 | $ 3,204
American Airlines, Inc. |  |  |
Related Party Transaction [Line Items] |  |  |
Accounts payable | (2,232) | (2,071) |
Total | 7,070 | 6,588 |
Regional expenses | 4,619 | 4,345 | $ 3,111
American Airlines, Inc. | AAG |  |  |
Related Party Transaction [Line Items] |  |  |
AAG | 9,144 | 8,692 |
American Airlines, Inc. | AAG's Wholly-owned Subsidiaries |  |  |
Related Party Transaction [Line Items] |  |  |
Accounts payable | $ (2,074) | $ (2,104) |

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