Debt - Components of Long-Term Debt (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Total long-term debt	$ 33,277	$ 35,289
Less: Total unamortized debt discount, premium and issuance costs	362	386
Less: Current maturities	3,607	3,059
Long-term debt, net of current maturities	29,308	31,844
American Airlines, Inc.
Debt Instrument [Line Items]
Less: Total unamortized debt discount, premium and issuance costs	347	364
Less: Current maturities	3,607	3,059
Long-term debt, net of current maturities	24,090	26,620
Secured Debt
Debt Instrument [Line Items]
Total long-term debt	28,044	30,043
Secured Debt | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	28,044	30,043
Secured Debt | 2013 Revolving Facility
Debt Instrument [Line Items]
Total long-term debt	$ 990	1,752
Variable interest rate	8.59%
Secured Debt | 2013 Revolving Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 990	1,752
Variable interest rate	8.59%
Secured Debt | 2014 Revolving Facility
Debt Instrument [Line Items]
Total long-term debt	$ 1,183	1,196
Variable interest rate	7.32%
Secured Debt | 2014 Revolving Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 1,183	1,196
Variable interest rate	7.32%
Secured Debt | 11.75% Senior Secured Notes
Debt Instrument [Line Items]
Total long-term debt	$ 1,961	2,500
Interest rate	11.75%
Secured Debt | 11.75% Senior Secured Notes | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 1,961	2,500
Interest rate	11.75%
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	0
Interest rate	7.25%
Secured Debt | 7.25% Senior Notes | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 750	0
Interest rate	7.25%
Secured Debt | 5.50% Senior Notes
Debt Instrument [Line Items]
Total long-term debt	$ 3,209	3,500
Interest rate	5.50%
Secured Debt | 5.50% Senior Notes | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 3,209	3,500
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	$ 3,325	3,500
Variable interest rate	10.34%
Secured Debt | AAdvantage Term Loan Facility | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 3,325	3,500
Variable interest rate	10.34%
Secured Debt | Enhanced Equipment Trust Certificates (EETC)
Debt Instrument [Line Items]
Total long-term debt	$ 8,005	9,175
Average interest rate	3.65%
Secured Debt | Enhanced Equipment Trust Certificates (EETC) | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 8,005	9,175
Average interest rate	3.65%
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	7.13%
Secured Debt | Enhanced Equipment Trust Certificates (EETC) | Maximum | American Airlines, Inc.
Debt Instrument [Line Items]
Interest rate	7.13%
Secured Debt | Equipment Loans and Other Notes Payable
Debt Instrument [Line Items]
Total long-term debt	$ 3,454	3,170
Average interest rate	6.91%
Secured Debt | Equipment Loans and Other Notes Payable | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 3,454	3,170
Average interest rate	6.91%
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	8.92%
Secured Debt | Equipment Loans and Other Notes Payable | Maximum | American Airlines, Inc.
Debt Instrument [Line Items]
Interest rate	8.92%
Secured Debt | Special Facility Revenue Bonds
Debt Instrument [Line Items]
Total long-term debt	$ 967	1,050
Secured Debt | Special Facility Revenue Bonds | American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 967	1,050
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	5,246
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	$ 500
Interest rate	3.75%