Debt - Components of Long-Term Debt (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	May 28, 2025	Mar. 24, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Total long-term debt	$ 28,365			$ 30,118
Less: Total unamortized debt discount, premium and issuance costs	319			305
Less: Current maturities	3,508			5,196
Long-term debt, net of current maturities	24,538			24,617
American Airlines, Inc.
Debt Instrument [Line Items]
Less: Total unamortized debt discount, premium and issuance costs	317			300
Less: Current maturities	3,508			4,196
Long-term debt, net of current maturities	20,794			20,876
Secured Debt
Debt Instrument [Line Items]
Total long-term debt	24,619			25,372
Secured Debt | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 24,619			25,372
Secured Debt | 2013 Revolving Facility
Debt Instrument [Line Items]
Variable interest rate	6.50%
Total long-term debt	$ 970			980
Secured Debt | 2013 Revolving Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Variable interest rate	6.50%
Total long-term debt	$ 970			980
Secured Debt | 2014 Revolving Facility
Debt Instrument [Line Items]
Variable interest rate	5.98%
Total long-term debt	$ 1,159			1,171
Secured Debt | 2014 Revolving Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Variable interest rate	5.98%
Total long-term debt	$ 1,159			1,171
Secured Debt | 2023 Revolving Facility
Debt Instrument [Line Items]
Variable interest rate	6.26%
Total long-term debt	$ 1,089			1,089
Secured Debt | 2023 Revolving Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Variable interest rate	6.26%
Total long-term debt	$ 1,089			1,089
Secured Debt | 10.75% Senior Secured Notes, IP Notes
Debt Instrument [Line Items]
Interest rate	10.75%
Total long-term debt	$ 524			781
Secured Debt | 10.75% Senior Secured Notes, IP Notes | American Airlines, Inc.
Debt Instrument [Line Items]
Interest rate	10.75%
Total long-term debt	$ 524			781
Secured Debt | 10.75% Senior Secured Notes, LGA/DCA Notes
Debt Instrument [Line Items]
Interest rate	10.75%
Total long-term debt	$ 105			156
Secured Debt | 10.75% Senior Secured Notes, LGA/DCA Notes | American Airlines, Inc.
Debt Instrument [Line Items]
Interest rate	10.75%
Total long-term debt	$ 105			156
Secured Debt | 7.25% Senior Notes
Debt Instrument [Line Items]
Interest rate	7.25%
Total long-term debt	$ 750			750
Secured Debt | 7.25% Senior Notes | American Airlines, Inc.
Debt Instrument [Line Items]
Interest rate	7.25%
Total long-term debt	$ 750			750
Secured Debt | 8.50% Senior Notes
Debt Instrument [Line Items]
Interest rate	8.50%
Total long-term debt	$ 1,000			1,000
Secured Debt | 8.50% Senior Notes | American Airlines, Inc.
Debt Instrument [Line Items]
Interest rate	8.50%
Total long-term debt	$ 1,000			1,000
Secured Debt | 5.50% Senior Notes
Debt Instrument [Line Items]
Interest rate	5.50%
Total long-term debt	$ 875			1,750
Secured Debt | 5.50% Senior Notes | American Airlines, Inc.
Debt Instrument [Line Items]
Interest rate	5.50%
Total long-term debt	$ 875			1,750
Secured Debt | 5.75% Senior Notes
Debt Instrument [Line Items]
Interest rate	5.75%
Total long-term debt	$ 3,000			3,000
Secured Debt | 5.75% Senior Notes | American Airlines, Inc.
Debt Instrument [Line Items]
Interest rate	5.75%
Total long-term debt	$ 3,000			3,000
Secured Debt | 2021 AAdvantage Term Loan Facility
Debt Instrument [Line Items]
Variable interest rate	6.58%
Total long-term debt	$ 2,269			2,450
Secured Debt | 2021 AAdvantage Term Loan Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Variable interest rate	6.58%
Total long-term debt	$ 2,269		$ 2,300	2,450
Secured Debt | 2025 AAdvantage Term Loan Facility
Debt Instrument [Line Items]
Variable interest rate	7.58%
Total long-term debt	$ 998			0
Secured Debt | 2025 AAdvantage Term Loan Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Variable interest rate	7.58%
Total long-term debt	$ 998	$ 1,000		0
Secured Debt | Enhanced Equipment Trust Certificates (EETC)
Debt Instrument [Line Items]
Average interest rate	3.77%
Total long-term debt	$ 6,211			7,271
Secured Debt | Enhanced Equipment Trust Certificates (EETC) | American Airlines, Inc.
Debt Instrument [Line Items]
Average interest rate	3.77%
Total long-term debt	$ 6,211			7,271
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]
Average interest rate	5.94%
Total long-term debt	$ 4,880			4,094
Secured Debt | Equipment Loans and Other Notes Payable | American Airlines, Inc.
Debt Instrument [Line Items]
Average interest rate	5.94%
Total long-term debt	$ 4,880			4,094
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	6.91%
Secured Debt | Equipment Loans and Other Notes Payable | Maximum | American Airlines, Inc.
Debt Instrument [Line Items]
Interest rate	6.91%
Secured Debt | Special Facility Revenue Bonds
Debt Instrument [Line Items]
Total long-term debt	$ 789			880
Secured Debt | Special Facility Revenue Bonds | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 789			880
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	$ 3,746			4,746
Unsecured Debt | Payroll Support Program Promissory Note One, CARES Act
Debt Instrument [Line Items]
Variable interest rate	6.04%
Total long-term debt	$ 1,757			1,757
Unsecured Debt | PSP2 and PSP 3
Debt Instrument [Line Items]
Interest rate	1.00%
Basis spread on variable rate	2.00%
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]
Interest rate	6.50%
Total long-term debt	$ 0			$ 1,000