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Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Payroll Support Program (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions | 24 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2023 | Apr. 23, 2021 | Jan. 15, 2021 | Apr. 20, 2020
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | $ 12,786 |  |  |  |
Notes Payable, Other Payables | Payroll Support Program Promissory Notes |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Aggregate principal issued |  | $ 3,700 |  |  |
Total PSP Financial Assistance, PSP1 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 5,958 |  |  |  |
Total PSP Financial Assistance, PSP2 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 3,533 |  |  |  |
Total PSP Financial Assistance, PSP3 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 3,295 |  |  |  |
Grant, PSP |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 8,855 |  |  |  |
Grant, PSP1 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 4,138 |  |  |  |
Grant, PSP2 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 2,427 |  |  |  |
Grant, PSP3 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 2,290 |  |  |  |
Promissory Notes, PSP |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 3,746 |  |  |  |
Promissory Notes, PSP1 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 1,757 |  |  |  |
Promissory Notes, PSP2 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 1,030 |  |  |  |
Promissory Notes, PSP3 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 959 |  |  |  |
Warrants Issued, PSP |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | $ 185 |  |  |  |
Warrants, number of warrant shares of common stock | 25,000 |  |  |  |
Warrants Issued, PSP1 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | $ 63 |  |  |  |
Warrants, number of warrant shares of common stock |  |  |  |  | 14,000
Exercise price of warrants (in dollars per share) |  |  |  |  | $ 12.51
Warrants Issued, PSP2 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 76 |  |  |  |
Warrants, number of warrant shares of common stock |  |  |  | 6,600 |
Exercise price of warrants (in dollars per share) |  |  |  | $ 15.66 |
Warrants Issued, PSP3 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 46 |  |  |  |
Warrants, number of warrant shares of common stock |  |  | 4,400 |  |
Exercise price of warrants (in dollars per share) |  |  | $ 21.75 |  |
American Airlines, Inc. |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 12,786 |  |  |  |
American Airlines, Inc. | Total PSP Financial Assistance, PSP1 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 5,958 |  |  |  |
American Airlines, Inc. | Total PSP Financial Assistance, PSP2 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 3,533 |  |  |  |
American Airlines, Inc. | Total PSP Financial Assistance, PSP3 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 3,295 |  |  |  |
American Airlines, Inc. | Grant, PSP |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 8,855 |  |  |  |
American Airlines, Inc. | Grant, PSP1 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 4,138 |  |  |  |
American Airlines, Inc. | Grant, PSP2 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 2,427 |  |  |  |
American Airlines, Inc. | Grant, PSP3 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 2,290 |  |  |  |
American Airlines, Inc. | Promissory Notes, PSP |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 3,746 |  |  |  |
American Airlines, Inc. | Promissory Notes, PSP1 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 1,757 |  |  |  |
American Airlines, Inc. | Promissory Notes, PSP2 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 1,030 |  |  |  |
American Airlines, Inc. | Promissory Notes, PSP3 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 959 |  |  |  |
American Airlines, Inc. | Warrants Issued, PSP |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | $ 185 |  |  |  |
Warrants, number of warrant shares of common stock | 25,000 |  |  |  |
American Airlines, Inc. | Warrants Issued, PSP1 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | $ 63 |  |  |  |
Warrants, number of warrant shares of common stock |  |  |  |  | 14,000
Exercise price of warrants (in dollars per share) |  |  |  |  | $ 12.51
American Airlines, Inc. | Warrants Issued, PSP2 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | 76 |  |  |  |
Warrants, number of warrant shares of common stock |  |  |  | 6,600 |
Exercise price of warrants (in dollars per share) |  |  |  | $ 15.66 |
American Airlines, Inc. | Warrants Issued, PSP3 |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Proceeds from government assistance, payroll support program, CARES Act | $ 46 |  |  |  |
Warrants, number of warrant shares of common stock |  |  | 4,400 |  |
Exercise price of warrants (in dollars per share) |  |  | $ 21.75 |  |

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