Debt - Components of Long-Term Debt (Details) - USD ($) $ in Millions	Mar. 31, 2025	Mar. 24, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Total long-term debt	$ 29,185		$ 30,118
Less: Total unamortized debt discount, premium and issuance costs	328		305
Less: Current maturities	4,640		5,196
Long-term debt, net of current maturities	24,217		24,617
American Airlines, Inc.
Debt Instrument [Line Items]
Less: Total unamortized debt discount, premium and issuance costs	324		300
Less: Current maturities	3,641		4,196
Long-term debt, net of current maturities	20,474		20,876
Secured Debt
Debt Instrument [Line Items]
Total long-term debt	24,439		25,372
Secured Debt | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 24,439		25,372
Secured Debt | 2013 Revolving Facility
Debt Instrument [Line Items]
Variable interest rate	6.57%
Total long-term debt	$ 980		980
Secured Debt | 2013 Revolving Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Variable interest rate	6.57%
Total long-term debt	$ 980		980
Secured Debt | 2014 Revolving Facility
Debt Instrument [Line Items]
Variable interest rate	6.17%
Total long-term debt	$ 1,159		1,171
Secured Debt | 2014 Revolving Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Variable interest rate	6.17%
Total long-term debt	$ 1,159		1,171
Secured Debt | 2023 Revolving Facility
Debt Instrument [Line Items]
Variable interest rate	6.51%
Total long-term debt	$ 1,089		1,089
Secured Debt | 2023 Revolving Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Variable interest rate	6.51%
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	$ 1,458		1,750
Secured Debt | 5.50% Senior Notes | American Airlines, Inc.
Debt Instrument [Line Items]
Interest rate	5.50%
Total long-term debt	$ 1,458		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 | AAdvantage Term Loan Facility
Debt Instrument [Line Items]
Variable interest rate	6.55%
Total long-term debt	$ 2,275		2,450
Secured Debt | AAdvantage Term Loan Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Variable interest rate	6.55%
Total long-term debt	$ 2,275	$ 2,300	2,450
Secured Debt | Enhanced Equipment Trust Certificates (EETC)
Debt Instrument [Line Items]
Average interest rate	3.80%
Total long-term debt	$ 6,894		7,271
Secured Debt | Enhanced Equipment Trust Certificates (EETC) | American Airlines, Inc.
Debt Instrument [Line Items]
Average interest rate	3.80%
Total long-term debt	$ 6,894		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	6.02%
Total long-term debt	$ 4,325		4,094
Secured Debt | Equipment Loans and Other Notes Payable | American Airlines, Inc.
Debt Instrument [Line Items]
Average interest rate	6.02%
Total long-term debt	$ 4,325		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	6.94%
Secured Debt | Equipment Loans and Other Notes Payable | Maximum | American Airlines, Inc.
Debt Instrument [Line Items]
Interest rate	6.94%
Secured Debt | Special Facility Revenue Bonds
Debt Instrument [Line Items]
Total long-term debt	$ 880		880
Secured Debt | Special Facility Revenue Bonds | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 880		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	$ 4,746		4,746
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]
Interest rate	6.50%
Total long-term debt	$ 1,000		$ 1,000