Commitments, Contingencies and Guarantees - Additional Information (Details) $ in Millions		12 Months Ended			96 Months Ended
	May 31, 2025 USD ($)	Dec. 31, 2025 USD ($) employee aircraft engine	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2025 USD ($) employee aircraft engine	Sep. 30, 2024 USD ($)	Feb. 15, 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		280			280
Number of spare aircraft engines owned through financing under EETCs | engine		60			60
Long-term debt		$ 28,594			$ 28,594
Letters of credit outstanding and surety bonds, amount		412			412
Guarantor obligations, maximum exposure, undiscounted		14,100			14,100
Operating lease liabilities		$ 6,963	$ 7,068		$ 6,963
Number of full-time equivalent employees | employee		139,100			139,100
Financial Guarantee
Long-term Purchase Commitment [Line Items]
Outstanding guaranteed obligation		$ 135			$ 135
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		86.00%
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		15.00%
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		$ 97			97
Leasehold Improvements | LAX Modernization Project
Long-term Purchase Commitment [Line Items]
Airport development, amount									$ 1,600
Amount appropriated by the City of Los Angeles towards project									1,600
Amount recovered to date					1,300
Additional reimbursements expected to be received		292			$ 292
Non-proprietary improvements sold and transferred in current period		163	588	$ 170
Airport redevelopment cost incurred in current year		$ 107	187	283
Regional Carrier
Long-term Purchase Commitment [Line Items]
Number of full-time equivalent employees | employee		33,100			33,100
Special Facility Revenue Bonds
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted		$ 703			$ 703
Operating lease liabilities		427			427
Secured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt		24,219	25,372		24,219
Line of Credit | Regional Airports Improvement Corporation | Revolving Credit Facility
Long-term Purchase Commitment [Line Items]
Line of credit facility, maximum borrowing capacity						$ 250
Enhanced Equipment Trust Certificates (EETC) | Secured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt		6,912	7,271		6,912
Special Facility Revenue Bonds | Secured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt		$ 789	880		$ 789
American Airlines, Inc.
Long-term Purchase Commitment [Line Items]
Number of aircraft owned through financing under EETCs | aircraft		280			280
Number of spare aircraft engines owned through financing under EETCs | engine		60			60
Long-term debt		$ 24,848			$ 24,848
Letters of credit outstanding and surety bonds, amount		412			412
Operating lease liabilities		$ 6,908	7,008		$ 6,908
Number of full-time equivalent employees | employee		106,000			106,000
American Airlines, Inc. | Financial Guarantee
Long-term Purchase Commitment [Line Items]
Outstanding guaranteed obligation		$ 135			$ 135
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. | Restricted Cash
Long-term Purchase Commitment [Line Items]
Letters of credit outstanding and surety bonds, amount		$ 97			97
American Airlines, Inc. | Leasehold Improvements | LAX Modernization Project
Long-term Purchase Commitment [Line Items]
Airport development, amount									1,600
Amount appropriated by the City of Los Angeles towards project									$ 1,600
Amount recovered to date					1,300
Additional reimbursements expected to be received		292			292
Non-proprietary improvements sold and transferred in current period		163	588	170
Airport redevelopment cost incurred in current year		107	187	$ 283
American Airlines, Inc. | Special Facility Revenue Bonds
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted		703			703
Operating lease liabilities		427			427
American Airlines, Inc. | Secured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt		24,219	25,372		24,219
American Airlines, Inc. | Line of Credit | Revolving Credit Facility
Long-term Purchase Commitment [Line Items]
Line of credit facility, maximum borrowing capacity						$ 250
American Airlines, Inc. | Enhanced Equipment Trust Certificates (EETC) | Secured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt		6,912	7,271		6,912
American Airlines, Inc. | Special Facility Revenue Bonds | Secured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt		789	$ 880		789
American Airlines, Inc. | PSP1 Promissory Note | Unsecured Debt
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted		1,800			1,800
American Airlines, Inc. | PSP2 Promissory Note | Unsecured Debt
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted		1,000			1,000
American Airlines, Inc. | PSP3 Promissory Note | Unsecured Debt
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted		959			$ 959
Tulsa Municipal Airport Trust ("TMAT")
Long-term Purchase Commitment [Line Items]
Expected cost of improvements		$ 328
Tulsa Municipal Airport Trust ("TMAT") | 2025 TMAT Bonds | Secured Debt
Long-term Purchase Commitment [Line Items]
Aggregate principal issued	$ 400
Proceeds from issuance of bonds	$ 432
Fixed interest rate per annum	6.25%
Tulsa Municipal Airport Trust ("TMAT") | Special Facility Revenue Bonds Maturing December 1, 2035 | Secured Debt
Long-term Purchase Commitment [Line Items]
Aggregate principal issued	$ 300
Pricing of bond, percentage of par value	109.00%
Tulsa Municipal Airport Trust ("TMAT") | Special Facility Revenue Bonds Maturing December 1, 2040 | Secured Debt
Long-term Purchase Commitment [Line Items]
Aggregate principal issued	$ 100
Pricing of bond, percentage of par value	107.00%
Tulsa Municipal Airport Trust ("TMAT") | 2015 TMAT Bonds | Secured Debt
Long-term Purchase Commitment [Line Items]
Redemption of aggregate principal	$ 104