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Income Taxes - Additional Disclosures (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income Taxes [Line Items] |  |  |
Other carryforwards | $ 4,700 |  |
Income tax provision (benefit) | $ 299 | $ 59 | $ (555)
Income tax expense, effective rate | 27.00% |  |
Federal |  |  |
Income Taxes [Line Items] |  |  |
Gross NOL carryforwards | $ 13,700 |  |
Operating loss carryforwards and other carryforwards, subject to expiration | 3,400 |  |
Operating loss carryforwards and other carryforwards, not subject to expiration | 15,000 |  |
State |  |  |
Income Taxes [Line Items] |  |  |
Gross NOL carryforwards | 5,500 |  |
American Airlines, Inc. |  |  |
Income Taxes [Line Items] |  |  |
Other carryforwards | 3,600 |  |
Income tax provision (benefit) | $ 394 | $ 116 | $ (500)
Income tax expense, effective rate | 25.00% |  |
American Airlines, Inc. | Federal |  |  |
Income Taxes [Line Items] |  |  |
Gross NOL carryforwards | $ 13,700 |  |
Operating loss carryforwards and other carryforwards, subject to expiration | 3,800 |  |
Operating loss carryforwards and other carryforwards, not subject to expiration | 13,500 |  |
American Airlines, Inc. | State |  |  |
Income Taxes [Line Items] |  |  |
Gross NOL carryforwards | $ 5,300 |  |

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