Commitments, Contingencies and Guarantees - Additional Information (Details)	1 Months Ended		12 Months Ended			84 Months Ended
	Nov. 30, 2024 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($) employee engine aircraft	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2024 USD ($) employee engine aircraft	Feb. 28, 2023 lawsuit	Dec. 07, 2022 plaintiff	Dec. 31, 2018 USD ($)
Long-term Purchase Commitment [Line Items]
Number of aircraft owned through financing under EETCs | aircraft			292			292
Number of spare aircraft engines owned through financing under EETCs | engine			60			60
Long-term debt			$ 30,118,000,000	$ 32,759,000,000		$ 30,118,000,000
Letters of credit outstanding and surety bonds, amount			343,000,000			343,000,000
Operating lease liabilities			$ 7,068,000,000	7,761,000,000		$ 7,068,000,000
Number of full-time equivalent employees | employee			133,300			133,300
Financial Guarantee
Long-term Purchase Commitment [Line Items]
Outstanding guaranteed obligation			$ 250,000,000			$ 250,000,000
Allied Pilots Association
Long-term Purchase Commitment [Line Items]
Collective bargaining agreement, one-time payment				754,000,000
Association of Professional Flight Attendants
Long-term Purchase Commitment [Line Items]
Collective bargaining agreement, term		5 years
Collective bargaining agreement, one-time payment	$ 514,000,000
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			6.00%
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			$ 98,000,000			98,000,000
Leasehold Improvements | LAX Modernization Project
Long-term Purchase Commitment [Line Items]
Airport development, amount									$ 1,600,000,000
Amount appropriated by the City of Los Angeles towards project									1,600,000,000
Amount recovered to date						1,200,000,000
Additional reimbursements expected to be received			450,000,000			$ 450,000,000
Non-proprietary improvements sold and transferred in current period			588,000,000	170,000,000
Airport redevelopment cost incurred in current year			$ 187,000,000	283,000,000	$ 241,000,000
Regional Carrier
Long-term Purchase Commitment [Line Items]
Number of full-time equivalent employees | employee			30,600			30,600
Special Facility Revenue Bonds
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted			$ 503,000,000			$ 503,000,000
Operating lease liabilities			321,000,000			321,000,000
Secured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt			25,372,000,000	27,526,000,000		25,372,000,000
Guarantor obligations, maximum exposure, undiscounted			15,200,000,000			15,200,000,000
Unsecured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt			4,746,000,000	5,233,000,000		4,746,000,000
Line of Credit | Regional Airports Improvement Corporation | Revolving Credit Facility
Long-term Purchase Commitment [Line Items]
Line of credit facility, maximum borrowing capacity		$ 250,000,000
Enhanced Equipment Trust Certificates (EETC) | Secured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt			7,271,000,000	7,657,000,000		7,271,000,000
Special Facility Revenue Bonds | Secured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt			880,000,000	967,000,000		880,000,000
PSP1 Promissory Note | Unsecured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt			1,757,000,000	1,757,000,000		1,757,000,000
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		$ 1,000,000,000
Fixed interest rate per annum			6.50%			6.50%
PSP2 Promissory Note | Unsecured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt			$ 1,030,000,000	1,030,000,000		$ 1,030,000,000
PSP3 Promissory Note | Unsecured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt			$ 959,000,000	959,000,000		$ 959,000,000
American Airlines, Inc.
Long-term Purchase Commitment [Line Items]
Number of aircraft owned through financing under EETCs | aircraft			292			292
Number of spare aircraft engines owned through financing under EETCs | engine			60			60
Long-term debt			$ 25,372,000,000			$ 25,372,000,000
Letters of credit outstanding and surety bonds, amount			343,000,000			343,000,000
Operating lease liabilities			$ 7,008,000,000	7,708,000,000		$ 7,008,000,000
Number of full-time equivalent employees | employee			102,700			102,700
American Airlines, Inc. | Financial Guarantee
Long-term Purchase Commitment [Line Items]
Outstanding guaranteed obligation			$ 250,000,000			$ 250,000,000
American Airlines, Inc. | Allied Pilots Association
Long-term Purchase Commitment [Line Items]
Collective bargaining agreement, one-time payment				754,000,000
American Airlines, Inc. | Association of Professional Flight Attendants
Long-term Purchase Commitment [Line Items]
Collective bargaining agreement, term		5 years
Collective bargaining agreement, one-time payment	$ 514,000,000
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			1.00%
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
Amount appropriated by the City of Los Angeles towards project									$ 1,600,000,000
Amount recovered to date						1,200,000,000
Additional reimbursements expected to be received			$ 450,000,000			450,000,000
Non-proprietary improvements sold and transferred in current period			588,000,000	170,000,000
Airport redevelopment cost incurred in current year			187,000,000	283,000,000	$ 241,000,000
American Airlines, Inc. | Special Facility Revenue Bonds
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted			503,000,000			503,000,000
American Airlines, Inc. | Secured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt			25,372,000,000	27,526,000,000		25,372,000,000
American Airlines, Inc. | Line of Credit | Revolving Credit Facility
Long-term Purchase Commitment [Line Items]
Line of credit facility, maximum borrowing capacity		$ 250,000,000
American Airlines, Inc. | Enhanced Equipment Trust Certificates (EETC) | Secured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt			7,271,000,000	7,657,000,000		7,271,000,000
American Airlines, Inc. | Special Facility Revenue Bonds | Secured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt			880,000,000	$ 967,000,000		880,000,000
American Airlines, Inc. | PSP1 Promissory Note | Unsecured Debt
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted			1,800,000,000			1,800,000,000
American Airlines, Inc. | Convertible Senior Notes 6.50% Due 2025 | Unsecured Debt
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted			$ 1,000,000,000.0			$ 1,000,000,000.0
Fixed interest rate per annum			6.50%			6.50%
American Airlines, Inc. | PSP2 Promissory Note | Unsecured Debt
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted			$ 1,000,000,000.0			$ 1,000,000,000.0
American Airlines, Inc. | PSP3 Promissory Note | Unsecured Debt
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted			$ 959,000,000			$ 959,000,000