Debt - Components of Long-Term Debt (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Total long-term debt	$ 31,430	$ 32,759
Less: Total unamortized debt discount, premium and issuance costs	320	363
Less: Current maturities	5,262	3,501
Long-term debt, net of current maturities	25,848	28,895
American Airlines, Inc.
Debt Instrument [Line Items]
Less: Total unamortized debt discount, premium and issuance costs	313	349
Less: Current maturities	3,775	3,501
Long-term debt, net of current maturities	22,109	23,676
Secured Debt
Debt Instrument [Line Items]
Total long-term debt	26,197	27,526
Secured Debt | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	26,197	27,526
Secured Debt | 2013 Revolving Facility
Debt Instrument [Line Items]
Total long-term debt	$ 980	990
Variable interest rate	7.96%
Secured Debt | 2013 Revolving Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 980	990
Variable interest rate	7.96%
Secured Debt | 2014 Revolving Facility
Debt Instrument [Line Items]
Total long-term debt	$ 1,171	1,183
Variable interest rate	6.45%
Secured Debt | 2014 Revolving Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 1,171	1,183
Variable interest rate	6.45%
Secured Debt | 2023 Revolving Facility
Debt Instrument [Line Items]
Total long-term debt	$ 1,100	1,100
Variable interest rate	7.21%
Secured Debt | 2023 Revolving Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 1,100	1,100
Variable interest rate	7.21%
Secured Debt | 10.75% Senior Secured Notes, IP Notes
Debt Instrument [Line Items]
Total long-term debt	$ 1,000	1,000
Interest rate	10.75%
Secured Debt | 10.75% Senior Secured Notes, IP Notes | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 1,000	1,000
Interest rate	10.75%
Secured Debt | 10.75% Senior Secured Notes, LGA/DCA Notes
Debt Instrument [Line Items]
Total long-term debt	$ 200	200
Interest rate	10.75%
Secured Debt | 10.75% Senior Secured Notes, LGA/DCA Notes | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 200	200
Interest rate	10.75%
Secured Debt | 7.25% Senior Notes
Debt Instrument [Line Items]
Total long-term debt	$ 750	750
Interest rate	7.25%
Secured Debt | 7.25% Senior Notes | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 750	750
Interest rate	7.25%
Secured Debt | 8.50% Senior Notes
Debt Instrument [Line Items]
Total long-term debt	$ 1,000	1,000
Interest rate	8.50%
Secured Debt | 8.50% Senior Notes | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 1,000	1,000
Interest rate	8.50%
Secured Debt | 5.50% Senior Notes
Debt Instrument [Line Items]
Total long-term debt	$ 2,042	2,917
Interest rate	5.50%
Secured Debt | 5.50% Senior Notes | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 2,042	2,917
Interest rate	5.50%
Secured Debt | 5.75% Senior Notes
Debt Instrument [Line Items]
Total long-term debt	$ 3,000	3,000
Interest rate	5.75%
Secured Debt | 5.75% Senior Notes | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 3,000	3,000
Interest rate	5.75%
Secured Debt | AAdvantage Term Loan Facility
Debt Instrument [Line Items]
Total long-term debt	$ 2,625	3,150
Variable interest rate	10.29%
Secured Debt | AAdvantage Term Loan Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 2,625	3,150
Variable interest rate	10.29%
Secured Debt | Enhanced Equipment Trust Certificates (EETC)
Debt Instrument [Line Items]
Total long-term debt	$ 7,637	7,657
Average interest rate	3.88%
Secured Debt | Enhanced Equipment Trust Certificates (EETC) | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 7,637	7,657
Average interest rate	3.88%
Secured Debt | Enhanced Equipment Trust Certificates (EETC) | Minimum
Debt Instrument [Line Items]
Interest rate	2.88%
Secured Debt | Enhanced Equipment Trust Certificates (EETC) | Minimum | American Airlines, Inc.
Debt Instrument [Line Items]
Interest rate	2.88%
Secured Debt | Enhanced Equipment Trust Certificates (EETC) | Maximum
Debt Instrument [Line Items]
Interest rate	7.15%
Secured Debt | Enhanced Equipment Trust Certificates (EETC) | Maximum | American Airlines, Inc.
Debt Instrument [Line Items]
Interest rate	7.15%
Secured Debt | Equipment Loans and Other Notes Payable
Debt Instrument [Line Items]
Total long-term debt	$ 3,812	3,612
Average interest rate	6.70%
Secured Debt | Equipment Loans and Other Notes Payable | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 3,812	3,612
Average interest rate	6.70%
Secured Debt | Equipment Loans and Other Notes Payable | Minimum
Debt Instrument [Line Items]
Interest rate	2.55%
Secured Debt | Equipment Loans and Other Notes Payable | Minimum | American Airlines, Inc.
Debt Instrument [Line Items]
Interest rate	2.55%
Secured Debt | Equipment Loans and Other Notes Payable | Maximum
Debt Instrument [Line Items]
Interest rate	8.57%
Secured Debt | Equipment Loans and Other Notes Payable | Maximum | American Airlines, Inc.
Debt Instrument [Line Items]
Interest rate	8.57%
Secured Debt | Special Facility Revenue Bonds
Debt Instrument [Line Items]
Total long-term debt	$ 880	967
Secured Debt | Special Facility Revenue Bonds | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 880	967
Secured Debt | Special Facility Revenue Bonds | Minimum
Debt Instrument [Line Items]
Interest rate	2.25%
Secured Debt | Special Facility Revenue Bonds | Minimum | American Airlines, Inc.
Debt Instrument [Line Items]
Interest rate	2.25%
Secured Debt | Special Facility Revenue Bonds | Maximum
Debt Instrument [Line Items]
Interest rate	5.38%
Secured Debt | Special Facility Revenue Bonds | Maximum | American Airlines, Inc.
Debt Instrument [Line Items]
Interest rate	5.38%
Unsecured Debt
Debt Instrument [Line Items]
Total long-term debt	$ 5,233	5,233
Unsecured Debt | Payroll Support Program Promissory Note One, CARES Act
Debt Instrument [Line Items]
Total long-term debt	1,757	1,757
Unsecured Debt | Payroll Support Program Promissory Note Two, CARES Act
Debt Instrument [Line Items]
Total long-term debt	1,030	1,030
Unsecured Debt | Payroll Support Program Promissory Note Three, CARES Act
Debt Instrument [Line Items]
Total long-term debt	959	959
Unsecured Debt | 6.50% Senior Notes
Debt Instrument [Line Items]
Total long-term debt	$ 1,000	1,000
Interest rate	6.50%
Unsecured Debt | 3.75% Senior Notes
Debt Instrument [Line Items]
Total long-term debt	$ 487	$ 487
Interest rate	3.75%