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Income Taxes - Reconciliation of Income Tax Provision (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income Tax Disclosure [Line Items] |  |  |
Statutory income tax provision (benefit) | $ 235 | $ 39 | $ (535)
State, local and foreign income tax provision (benefit), net of federal tax effect | 22 | 0 | (37)
Book expenses not deductible for tax purposes | 38 | 22 | 23
Change in valuation allowance | 3 | 0 | 0
Other, net | 1 | (2) | (6)
Total income tax provision (benefit) | 299 | 59 | (555)
American Airlines, Inc. |  |  |
Income Tax Disclosure [Line Items] |  |  |
Statutory income tax provision (benefit) | 332 | 95 | (478)
State, local and foreign income tax provision (benefit), net of federal tax effect | 25 | 3 | (37)
Book expenses not deductible for tax purposes | 35 | 20 | 21
Change in valuation allowance | 3 | 0 | 0
Other, net | (1) | (2) | (6)
Total income tax provision (benefit) | $ 394 | $ 116 | $ (500)

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