Debt - Components of Debt (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Total	$ 27,305	$ 28,594
Less: Total unamortized debt discount, premium and issuance costs	288	314
Less: Current maturities	4,083	3,641
Long-term debt, net of current maturities	22,934	24,639
Unsecured Debt
Debt Instrument [Line Items]
Total	3,746	4,375
American Airlines, Inc.
Debt Instrument [Line Items]
Total	23,559	24,848
Less: Total unamortized debt discount, premium and issuance costs	286	313
Less: Current maturities	4,083	3,641
Long-term debt, net of current maturities	19,190	20,894
Senior Unsecured Short Term Loan Facility | Unsecured Debt
Debt Instrument [Line Items]
Short-term debt	0	629
Senior Unsecured Short Term Loan Facility | American Airlines, Inc. | Unsecured Debt
Debt Instrument [Line Items]
Short-term debt	0	629
Secured Debt
Debt Instrument [Line Items]
Long-term debt	23,559	24,219
Secured Debt | American Airlines, Inc.
Debt Instrument [Line Items]
Long-term debt	23,559	24,219
Secured Debt | 2013 Revolving Facility
Debt Instrument [Line Items]
Long-term debt	$ 970	970
Variable interest rate	6.00%
Secured Debt | 2013 Revolving Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Long-term debt	$ 970	970
Variable interest rate	6.00%
Secured Debt | 2014 Revolving Facility
Debt Instrument [Line Items]
Long-term debt	$ 1,147	1,159
Variable interest rate	5.52%
Secured Debt | 2014 Revolving Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Long-term debt	$ 1,147	1,159
Variable interest rate	5.52%
Secured Debt | 2023 Revolving Facility
Debt Instrument [Line Items]
Long-term debt	$ 1,078	1,078
Variable interest rate	5.91%
Secured Debt | 2023 Revolving Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Long-term debt	$ 1,078	1,078
Variable interest rate	5.91%
Secured Debt | 7.25% Senior Notes
Debt Instrument [Line Items]
Long-term debt	$ 750	750
Interest rate	7.25%
Secured Debt | 7.25% Senior Notes | American Airlines, Inc.
Debt Instrument [Line Items]
Long-term debt	$ 750	750
Interest rate	7.25%
Secured Debt | 8.50% Senior Notes
Debt Instrument [Line Items]
Long-term debt	$ 0	$ 1,000
Interest rate		8.50%
Secured Debt | 8.50% Senior Notes | American Airlines, Inc.
Debt Instrument [Line Items]
Long-term debt	$ 0	$ 1,000
Interest rate	8.50%	8.50%
Secured Debt | 5.50% Senior Notes
Debt Instrument [Line Items]
Long-term debt	$ 292	$ 583
Interest rate	5.50%
Secured Debt | 5.50% Senior Notes | American Airlines, Inc.
Debt Instrument [Line Items]
Long-term debt	$ 292	583
Interest rate	5.50%
Secured Debt | 5.75% Senior Notes
Debt Instrument [Line Items]
Long-term debt	$ 3,000	3,000
Interest rate	5.75%
Secured Debt | 5.75% Senior Notes | American Airlines, Inc.
Debt Instrument [Line Items]
Long-term debt	$ 3,000	3,000
Interest rate	5.75%
Secured Debt | 2021 AAdvantage Term Loan Facility
Debt Instrument [Line Items]
Long-term debt	$ 2,258	2,264
Variable interest rate	5.92%
Secured Debt | 2021 AAdvantage Term Loan Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Long-term debt	$ 2,258	2,264
Variable interest rate	5.92%
Secured Debt | 2025 AAdvantage Term Loan Facility
Debt Instrument [Line Items]
Long-term debt	$ 993	995
Variable interest rate	6.42%
Secured Debt | 2025 AAdvantage Term Loan Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Long-term debt	$ 993	995
Variable interest rate	6.42%
Secured Debt | Enhanced Equipment Trust Certificates (EETC)
Debt Instrument [Line Items]
Long-term debt	$ 7,755	6,912
Average interest rate	4.15%
Secured Debt | Enhanced Equipment Trust Certificates (EETC) | American Airlines, Inc.
Debt Instrument [Line Items]
Long-term debt	$ 7,755	6,912
Average interest rate	4.15%
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]
Long-term debt	$ 4,527	4,719
Average interest rate	5.45%
Secured Debt | Equipment Loans and Other Notes Payable | American Airlines, Inc.
Debt Instrument [Line Items]
Long-term debt	$ 4,527	4,719
Average interest rate	5.45%
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	6.29%
Secured Debt | Equipment Loans and Other Notes Payable | Maximum | American Airlines, Inc.
Debt Instrument [Line Items]
Interest rate	6.29%
Secured Debt | Special Facility Revenue Bonds
Debt Instrument [Line Items]
Long-term debt	$ 789	789
Secured Debt | Special Facility Revenue Bonds | American Airlines, Inc.
Debt Instrument [Line Items]
Long-term debt	$ 789	789
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 | Payroll Support Program Promissory Note One, CARES Act
Debt Instrument [Line Items]
Long-term debt	$ 1,757	1,757
Variable interest rate	5.57%
Unsecured Debt | Payroll Support Program Promissory Note Two, CARES Act
Debt Instrument [Line Items]
Long-term debt	$ 1,030	1,030
Variable interest rate	5.57%
Unsecured Debt | Payroll Support Program Promissory Note Three, CARES Act
Debt Instrument [Line Items]
Long-term debt	$ 959	$ 959
Interest rate	1.00%
Basis spread on variable rate	2.00%