Debt - Components of Long-Term Debt (Details) - USD ($)	Dec. 31, 2021	Mar. 24, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total long-term debt	$ 37,781,000,000		$ 32,770,000,000
Less: Total unamortized debt discount, premium and issuance costs	458,000,000		749,000,000
Less: Current maturities	2,315,000,000		2,697,000,000
Long-term debt, net of current maturities	35,008,000,000		29,324,000,000
Secured Debt
Debt Instrument [Line Items]
Total long-term debt	31,785,000,000		28,755,000,000
Secured Debt | 2013 Credit  Facilities
Debt Instrument [Line Items]
Total long-term debt	$ 1,770,000,000		1,788,000,000
Variable interest rate	1.85%
Secured Debt | 2013 Credit  Facilities | Revolving Credit Facility
Debt Instrument [Line Items]
Total long-term debt	$ 0		750,000,000
Long-term debt, net of current maturities	0
Secured Debt | 2014 Credit  Facilities
Debt Instrument [Line Items]
Total long-term debt	$ 1,208,000,000		1,220,000,000
Variable interest rate	1.85%
Secured Debt | 2014 Credit  Facilities | Revolving Credit Facility
Debt Instrument [Line Items]
Total long-term debt	$ 0		1,643,000,000
Long-term debt, net of current maturities	0
Secured Debt | April 2016 Credit Facilities
Debt Instrument [Line Items]
Total long-term debt	0		960,000,000
Secured Debt | April 2016 Credit Facilities | Revolving Credit Facility
Debt Instrument [Line Items]
Total long-term debt	0		450,000,000
Secured Debt | December 2016 Credit Facilities
Debt Instrument [Line Items]
Total long-term debt	$ 1,188,000,000		1,200,000,000
Variable interest rate	2.11%
Secured Debt | December 2016 Credit Facilities | Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt, net of current maturities	$ 1,188,000,000
Secured Debt | Senior Notes 11.75% Due 2025
Debt Instrument [Line Items]
Total long-term debt	$ 2,500,000,000		2,500,000,000
Fixed interest rate per annum	11.75%
Secured Debt | Senior Secured IP Notes 10.75% Due 2026
Debt Instrument [Line Items]
Total long-term debt	$ 1,000,000,000		1,000,000,000
Fixed interest rate per annum	10.75%
Secured Debt | Senior Secured LGA/DCA Notes 10.75%
Debt Instrument [Line Items]
Total long-term debt	$ 200,000,000		200,000,000
Fixed interest rate per annum	10.75%
Secured Debt | Treasury Term Loan Facility | Line of Credit
Debt Instrument [Line Items]
Total long-term debt	$ 0		550,000,000
Secured Debt | 5.50% Senior Notes
Debt Instrument [Line Items]
Total long-term debt	$ 3,500,000,000		0
Fixed interest rate per annum	5.50%
Secured Debt | 5.75% Senior Notes
Debt Instrument [Line Items]
Total long-term debt	$ 3,000,000,000		0
Fixed interest rate per annum	5.75%
Secured Debt | AAdvantage Term Loan Facility
Debt Instrument [Line Items]
Total long-term debt	$ 3,500,000,000	$ 3,500,000,000	0
Variable interest rate	5.50%
Secured Debt | AAdvantage Term Loan Facility | Minimum
Debt Instrument [Line Items]
Variable interest rate	0.75%
Secured Debt | Enhanced Equipment Trust Certificates (EETC)
Debt Instrument [Line Items]
Total long-term debt	$ 9,357,000,000		11,013,000,000
Average interest rate	3.84%
Secured Debt | Enhanced Equipment Trust Certificates (EETC) | Minimum
Debt Instrument [Line Items]
Fixed interest rate per annum	2.88%
Secured Debt | Enhanced Equipment Trust Certificates (EETC) | Maximum
Debt Instrument [Line Items]
Fixed interest rate per annum	8.39%
Secured Debt | Equipment Loans and Other Notes Payable
Debt Instrument [Line Items]
Total long-term debt	$ 3,433,000,000		4,417,000,000
Average interest rate	1.82%
Secured Debt | Equipment Loans and Other Notes Payable | Minimum
Debt Instrument [Line Items]
Fixed interest rate per annum	1.27%
Secured Debt | Equipment Loans and Other Notes Payable | Maximum
Debt Instrument [Line Items]
Fixed interest rate per annum	4.64%
Secured Debt | Special Facility Revenue Bonds
Debt Instrument [Line Items]
Total long-term debt	$ 1,129,000,000		1,064,000,000
Secured Debt | Special Facility Revenue Bonds | Minimum
Debt Instrument [Line Items]
Fixed interest rate per annum	2.25%
Secured Debt | Special Facility Revenue Bonds | Maximum
Debt Instrument [Line Items]
Fixed interest rate per annum	5.38%
Unsecured Debt
Debt Instrument [Line Items]
Total long-term debt	$ 5,996,000,000		4,015,000,000
Unsecured Debt | PSP1 Promissory Note
Debt Instrument [Line Items]
Total long-term debt	1,765,000,000		1,765,000,000
Unsecured Debt | PSP2 Promissory Note
Debt Instrument [Line Items]
Total long-term debt	1,035,000,000		0
Unsecured Debt | PSP3 Promissory Note
Debt Instrument [Line Items]
Total long-term debt	946,000,000		0
Unsecured Debt | Senior Notes 6.50% Due 2025
Debt Instrument [Line Items]
Total long-term debt	$ 1,000,000,000		1,000,000,000
Fixed interest rate per annum	6.50%
Unsecured Debt | Senior Notes 5.000% Due 2022
Debt Instrument [Line Items]
Total long-term debt	$ 750,000,000		750,000,000
Fixed interest rate per annum	5.00%
Unsecured Debt | Senior Notes 3.75% Matures 2025
Debt Instrument [Line Items]
Total long-term debt	$ 500,000,000		500,000,000
Fixed interest rate per annum	3.75%
American Airlines, Inc.
Debt Instrument [Line Items]
Total long-term debt	$ 31,785,000,000
Less: Total unamortized debt discount, premium and issuance costs	428,000,000		321,000,000
Less: Current maturities	1,568,000,000		2,700,000,000
Long-term debt, net of current maturities	29,789,000,000		25,710,000,000
American Airlines, Inc. | Secured Debt
Debt Instrument [Line Items]
Total long-term debt	31,785,000,000		28,731,000,000
American Airlines, Inc. | Secured Debt | 2013 Credit  Facilities
Debt Instrument [Line Items]
Total long-term debt	$ 1,770,000,000		1,788,000,000
Variable interest rate	1.85%
American Airlines, Inc. | Secured Debt | 2013 Credit  Facilities | Revolving Credit Facility
Debt Instrument [Line Items]
Total long-term debt	$ 0		750,000,000
American Airlines, Inc. | Secured Debt | 2014 Credit  Facilities
Debt Instrument [Line Items]
Total long-term debt	$ 1,208,000,000		1,220,000,000
Variable interest rate	1.85%
American Airlines, Inc. | Secured Debt | 2014 Credit  Facilities | Revolving Credit Facility
Debt Instrument [Line Items]
Total long-term debt	$ 0		1,643,000,000
American Airlines, Inc. | Secured Debt | April 2016 Credit Facilities
Debt Instrument [Line Items]
Total long-term debt	0		960,000,000
American Airlines, Inc. | Secured Debt | April 2016 Credit Facilities | Revolving Credit Facility
Debt Instrument [Line Items]
Total long-term debt	0		450,000,000
American Airlines, Inc. | Secured Debt | December 2016 Credit Facilities
Debt Instrument [Line Items]
Total long-term debt	$ 1,188,000,000		1,200,000,000
Variable interest rate	2.11%
American Airlines, Inc. | Secured Debt | Senior Notes 11.75% Due 2025
Debt Instrument [Line Items]
Total long-term debt	$ 2,500,000,000		2,500,000,000
Fixed interest rate per annum	11.75%
American Airlines, Inc. | Secured Debt | Senior Secured IP Notes 10.75% Due 2026
Debt Instrument [Line Items]
Total long-term debt	$ 1,000,000,000		1,000,000,000
Fixed interest rate per annum	10.75%
American Airlines, Inc. | Secured Debt | Senior Secured LGA/DCA Notes 10.75%
Debt Instrument [Line Items]
Total long-term debt	$ 200,000,000		200,000,000
Fixed interest rate per annum	10.75%
American Airlines, Inc. | Secured Debt | Treasury Term Loan Facility | Line of Credit
Debt Instrument [Line Items]
Total long-term debt	$ 0		550,000,000
American Airlines, Inc. | Secured Debt | 5.50% Senior Notes
Debt Instrument [Line Items]
Total long-term debt	$ 3,500,000,000		0
Fixed interest rate per annum	5.50%
American Airlines, Inc. | Secured Debt | 5.75% Senior Notes
Debt Instrument [Line Items]
Total long-term debt	$ 3,000,000,000		0
Fixed interest rate per annum	5.75%
American Airlines, Inc. | Secured Debt | AAdvantage Term Loan Facility
Debt Instrument [Line Items]
Total long-term debt	$ 3,500,000,000		0
Variable interest rate	5.50%
American Airlines, Inc. | Secured Debt | Enhanced Equipment Trust Certificates (EETC)
Debt Instrument [Line Items]
Total long-term debt	$ 9,357,000,000		11,013,000,000
Average interest rate	3.84%
American Airlines, Inc. | Secured Debt | Enhanced Equipment Trust Certificates (EETC) | Minimum
Debt Instrument [Line Items]
Fixed interest rate per annum	2.88%
American Airlines, Inc. | Secured Debt | Enhanced Equipment Trust Certificates (EETC) | Maximum
Debt Instrument [Line Items]
Fixed interest rate per annum	8.39%
American Airlines, Inc. | Secured Debt | Equipment Loans and Other Notes Payable
Debt Instrument [Line Items]
Total long-term debt	$ 3,433,000,000		4,417,000,000
Average interest rate	1.82%
American Airlines, Inc. | Secured Debt | Equipment Loans and Other Notes Payable | Minimum
Debt Instrument [Line Items]
Fixed interest rate per annum	1.27%
American Airlines, Inc. | Secured Debt | Equipment Loans and Other Notes Payable | Maximum
Debt Instrument [Line Items]
Fixed interest rate per annum	4.64%
American Airlines, Inc. | Secured Debt | Special Facility Revenue Bonds
Debt Instrument [Line Items]
Total long-term debt	$ 1,129,000,000		$ 1,040,000,000
American Airlines, Inc. | Secured Debt | Special Facility Revenue Bonds | Minimum
Debt Instrument [Line Items]
Fixed interest rate per annum	2.25%
American Airlines, Inc. | Secured Debt | Special Facility Revenue Bonds | Maximum
Debt Instrument [Line Items]
Fixed interest rate per annum	5.38%
American Airlines, Inc. | Unsecured Debt | Senior Notes 6.50% Due 2025
Debt Instrument [Line Items]
Fixed interest rate per annum	6.50%
American Airlines, Inc. | Unsecured Debt | Senior Notes 3.75% Matures 2025
Debt Instrument [Line Items]
Fixed interest rate per annum	3.75%