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Commitments, Contingencies and Guarantees - Additional Information (Details) | 1 Months Ended | 12 Months Ended |  |  |  |
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Jan. 31, 2024 | Aug. 31, 2023 | Dec. 31, 2023 USD ($) employee engine aircraft | Feb. 28, 2023 lawsuit | Dec. 31, 2022 USD ($) | Dec. 07, 2022 plaintiff | Dec. 31, 2018 USD ($) lane
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Airport redevelopment, number of security screening lanes | lane |  |  |  |  |  |  | 10
Number of aircraft owned through financing under EETCs | aircraft |  |  | 308 |  |  |  |
Number of spare aircraft engines owned through financing under EETCs | engine |  |  | 60 |  |  |  |
Long-term debt |  |  | $ 32,759,000,000 |  | $ 35,289,000,000 |  |
Letters of credit outstanding and surety bonds, amount |  |  | 318,000,000 |  |  |  |
Operating lease liabilities |  |  | $ 7,761,000,000 |  | 8,024,000,000 |  |
Number of full-time equivalent employees | employee |  |  | 132,100 |  |  |  |
Allied Pilots Association |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Collective bargaining agreement, term |  | 4 years |  |  |  |  |
Collective bargaining agreement, initial rate increase, percent |  | 21.00% |  |  |  |  |
Collective bargaining agreement, one-time payment |  |  | $ 754,000,000 |  |  |  |
Adjustments to other benefit-related items |  |  | $ 235,000,000 |  |  |  |
Workforce Subject to Collective-Bargaining Arrangements | Unionized Employees Concentration Risk |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Percentage of employees covered by collective bargaining agreements with various labor unions |  |  | 87.00% |  |  |  |
Workforce Subject to Collective-Bargaining Arrangements Expiring within One Year | Unionized Employees Concentration Risk |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Percentage of employees covered by collective bargaining agreements with various labor unions |  |  | 34.00% |  |  |  |
Subsequent Event | CWA-IBT |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Collective bargaining agreement, term | 5 years |  |  |  |  |  |
Private Party Antitrust Actions Related to the Northeast Alliance |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Number of private party plaintiffs who filed putative class action | plaintiff |  |  |  |  |  | 2 |
Number of additional putative class action lawsuits | lawsuit |  |  |  | 2 |  |  |
Restricted Cash |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Letters of credit outstanding and surety bonds, amount |  |  | $ 94,000,000 |  |  |  |
Leasehold Improvements | LAX Modernization Project |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Airport development, amount |  |  |  |  |  |  | $ 1,600,000,000
Airport redevelopment, costs incurred and capitalized |  |  | 862,000,000 |  |  |  |
Airport redevelopment cost incurred in current year |  |  | 283,000,000 |  |  |  |
Non-proprietary improvements sold and transferred |  |  | 346,000,000 |  |  |  |
Non-proprietary improvements sold and transferred in current period |  |  | 170,000,000 |  |  |  |
Proceeds for non-proprietary improvements not yet ready for use |  |  | $ 53,000,000 |  |  |  |
Regional Carrier |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Number of full-time equivalent employees | employee |  |  | 28,900 |  |  |  |
Special Facility Revenue Bonds |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Guarantor obligations, maximum exposure, undiscounted |  |  | $ 520,000,000 |  |  |  |
Operating lease liabilities |  |  | 321,000,000 |  |  |  |
Secured Debt |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Long-term debt |  |  | 27,526,000,000 |  | 30,043,000,000 |  |
Guarantor obligations, maximum exposure, undiscounted |  |  | 17,500,000,000 |  |  |  |
Unsecured Debt |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Long-term debt |  |  | 5,233,000,000 |  | 5,246,000,000 |  |
Enhanced Equipment Trust Certificates (EETC) | Secured Debt |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Long-term debt |  |  | 7,657,000,000 |  | 9,175,000,000 |  |
Special Facility Revenue Bonds | Secured Debt |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Long-term debt |  |  | 967,000,000 |  | 1,050,000,000 |  |
PSP1 Promissory Note | Unsecured Debt |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Long-term debt |  |  | 1,757,000,000 |  | 1,757,000,000 |  |
Senior Notes 3.75% Matures 2025 | Unsecured Debt |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Long-term debt |  |  | $ 487,000,000 |  | 500,000,000 |  |
Fixed interest rate per annum |  |  | 3.75% |  |  |  |
Convertible Senior Notes 6.50% Due 2025 | Unsecured Debt |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Long-term debt |  |  | $ 1,000,000,000 |  | 1,000,000,000 |  |
Fixed interest rate per annum |  |  | 6.50% |  |  |  |
American Airlines, Inc. |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Airport redevelopment, number of security screening lanes | lane |  |  |  |  |  |  | 10
Number of aircraft owned through financing under EETCs | aircraft |  |  | 308 |  |  |  |
Number of spare aircraft engines owned through financing under EETCs | engine |  |  | 60 |  |  |  |
Long-term debt |  |  | $ 27,526,000,000 |  |  |  |
Letters of credit outstanding and surety bonds, amount |  |  | 318,000,000 |  |  |  |
Operating lease liabilities |  |  | $ 7,708,000,000 |  | 7,961,000,000 |  |
Number of full-time equivalent employees | employee |  |  | 103,200 |  |  |  |
American Airlines, Inc. | Allied Pilots Association |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Collective bargaining agreement, term |  | 4 years |  |  |  |  |
Collective bargaining agreement, initial rate increase, percent |  | 21.00% |  |  |  |  |
Collective bargaining agreement, one-time payment |  |  | $ 754,000,000 |  |  |  |
Adjustments to other benefit-related items |  |  | $ 235,000,000 |  |  |  |
American Airlines, Inc. | Workforce Subject to Collective-Bargaining Arrangements | Unionized Employees Concentration Risk |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Percentage of employees covered by collective bargaining agreements with various labor unions |  |  | 87.00% |  |  |  |
American Airlines, Inc. | Workforce Subject to Collective-Bargaining Arrangements Expiring within One Year | Unionized Employees Concentration Risk |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Percentage of employees covered by collective bargaining agreements with various labor unions |  |  | 38.00% |  |  |  |
American Airlines, Inc. | Subsequent Event |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Collective bargaining agreement, term | 5 years |  |  |  |  |  |
American Airlines, Inc. | Private Party Antitrust Actions Related to the Northeast Alliance |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Number of private party plaintiffs who filed putative class action | plaintiff |  |  |  |  |  | 2 |
Number of additional putative class action lawsuits | lawsuit |  |  |  | 2 |  |  |
American Airlines, Inc. | Leasehold Improvements | LAX Modernization Project |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Airport development, amount |  |  |  |  |  |  | $ 1,600,000,000
Airport redevelopment, costs incurred and capitalized |  |  | $ 862,000,000 |  |  |  |
Airport redevelopment cost incurred in current year |  |  | 283,000,000 |  |  |  |
Non-proprietary improvements sold and transferred |  |  | 346,000,000 |  |  |  |
Non-proprietary improvements sold and transferred in current period |  |  | 170,000,000 |  |  |  |
Proceeds for non-proprietary improvements not yet ready for use |  |  | 53,000,000 |  |  |  |
American Airlines, Inc. | Special Facility Revenue Bonds |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Guarantor obligations, maximum exposure, undiscounted |  |  | 520,000,000 |  |  |  |
American Airlines, Inc. | Secured Debt |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Long-term debt |  |  | 27,526,000,000 |  | 30,043,000,000 |  |
American Airlines, Inc. | Enhanced Equipment Trust Certificates (EETC) | Secured Debt |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Long-term debt |  |  | 7,657,000,000 |  | 9,175,000,000 |  |
American Airlines, Inc. | Special Facility Revenue Bonds | Secured Debt |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Long-term debt |  |  | 967,000,000 |  | $ 1,050,000,000 |  |
American Airlines, Inc. | PSP1 Promissory Note | Unsecured Debt |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Guarantor obligations, maximum exposure, undiscounted |  |  | 1,800,000,000 |  |  |  |
American Airlines, Inc. | Senior Notes 3.75% Matures 2025 | Unsecured Debt |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Guarantor obligations, maximum exposure, undiscounted |  |  | $ 487,000,000 |  |  |  |
Fixed interest rate per annum |  |  | 3.75% |  |  |  |
American Airlines, Inc. | Convertible Senior Notes 6.50% Due 2025 | Unsecured Debt |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |
Guarantor obligations, maximum exposure, undiscounted |  |  | $ 1,000,000,000 |  |  |  |
Fixed interest rate per annum |  |  | 6.50% |  |  |  |

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