Commitments, Contingencies and Guarantees - Additional Information (Details) shares in Millions			1 Months Ended	12 Months Ended
	Dec. 07, 2021 shares	Jun. 15, 2018 USD ($)	Jun. 30, 2015 lawsuit	Dec. 31, 2021 USD ($) employee aircraft engine shares	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jan. 31, 2020 USD ($) ft²	Dec. 31, 2018 USD ($) lane
Long-term Purchase Commitment [Line Items]
Airport redevelopment, number of security screening lanes | lane								10
Payments for terminal upgrade project				$ 204,000,000	$ 173,000,000	$ 98,000,000
Number of aircraft owned through financing under EETCs | aircraft				344
Number of aircraft leased through financing under EETCs | aircraft				11
Number of spare aircraft engines owned through financing under EETCs | engine				60
Long-term debt				$ 37,781,000,000	32,770,000,000
Operating lease liabilities				8,117,000,000	8,428,000,000
Letters of credit outstanding and surety bonds, amount				$ 439,000,000
Capital shares distributed from disputed claims reserve (in shares) | shares	4.5
Shares reserved for issuance in Disputed Claims Reserve (in shares) | shares				0.3
Number of putative class action lawsuits | lawsuit			100
Settlement amount		$ 45,000,000
Number of full-time equivalent employees | employee				123,400
Percentage of employees covered by collective bargaining agreements with various labor unions				86.00%
Percentage of employees covered by collective bargaining agreements that are currently available				0.45
JFK Airport Upgrade
Long-term Purchase Commitment [Line Items]
Construction project, expected Cost							$ 439,000,000
Payments for terminal upgrade project				$ 118,000,000
JFK Airport Upgrade, Existing Terminal Building
Long-term Purchase Commitment [Line Items]
Area of real estate property | ft²							73,300
JFK Airport Upgrade, New Terminal Building
Long-term Purchase Commitment [Line Items]
Area of real estate property | ft²							51,000
Restricted Cash
Long-term Purchase Commitment [Line Items]
Letters of credit outstanding and surety bonds, amount				94,000,000
Leasehold Improvements | LAX Modernization Project
Long-term Purchase Commitment [Line Items]
Airport development, amount								$ 1,600,000,000
Airport redevelopment, costs incurred and capitalized				338,000,000
Airport redevelopment cost incurred in current year				112,000,000	114,000,000	98,000,000
Non-proprietary improvements sold and transferred				132,000,000
Non-proprietary improvements sold and transferred in current period				21,000,000
Proceeds for non-proprietary improvements not yet ready for use				$ 88,000,000
Regional Carrier
Long-term Purchase Commitment [Line Items]
Number of full-time equivalent employees | employee				26,600
EETC Leveraged Lease Financings
Long-term Purchase Commitment [Line Items]
Operating lease liabilities				$ 20,000,000
Special Facility Revenue Bonds
Long-term Purchase Commitment [Line Items]
Operating lease liabilities				321,000,000
Guarantor obligations, maximum exposure, undiscounted				555,000,000
Secured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt				31,785,000,000	28,755,000,000
Guarantor obligations, maximum exposure, undiscounted				19,800,000,000
Unsecured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt				5,996,000,000	4,015,000,000
Enhanced Equipment Trust Certificates (EETC) | Secured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt				9,357,000,000	11,013,000,000
Special Facility Revenue Bonds | Secured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt				1,129,000,000	1,064,000,000
Guarantor obligations, maximum exposure, undiscounted				1,100,000,000
PSP1 Promissory Note | Unsecured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt				1,765,000,000	1,765,000,000
Senior Notes 5.000% Due 2022 | Unsecured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt				$ 750,000,000	750,000,000
Fixed interest rate per annum				5.00%
Senior Notes 3.75% Matures 2025 | Unsecured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt				$ 500,000,000	500,000,000
Fixed interest rate per annum				3.75%
Senior Notes 6.50% Due 2025 | Unsecured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt				$ 1,000,000,000	1,000,000,000
Fixed interest rate per annum				6.50%
American Airlines, Inc.
Long-term Purchase Commitment [Line Items]
Airport redevelopment, number of security screening lanes | lane								10
Payments for terminal upgrade project				$ 204,000,000	173,000,000	98,000,000
Number of aircraft owned through financing under EETCs | aircraft				344
Number of aircraft leased through financing under EETCs | aircraft				11
Number of spare aircraft engines owned through financing under EETCs | engine				60
Long-term debt				$ 31,785,000,000
Operating lease liabilities				8,074,000,000	8,380,000,000
Letters of credit outstanding and surety bonds, amount				$ 439,000,000
Capital shares distributed from disputed claims reserve (in shares) | shares	4.5
Shares reserved for issuance in Disputed Claims Reserve (in shares) | shares				0.3
Number of putative class action lawsuits | lawsuit			100
Settlement amount		$ 45,000,000
Number of full-time equivalent employees | employee				96,800
Percentage of employees covered by collective bargaining agreements with various labor unions				87.00%
Percentage of employees covered by collective bargaining agreements that are currently available				0.54
American Airlines, Inc. | JFK Airport Upgrade
Long-term Purchase Commitment [Line Items]
Construction project, expected Cost							$ 439,000,000
Payments for terminal upgrade project				$ 118,000,000
American Airlines, Inc. | Leasehold Improvements | LAX Modernization Project
Long-term Purchase Commitment [Line Items]
Airport development, amount								$ 1,600,000,000
Airport redevelopment, costs incurred and capitalized				338,000,000
Airport redevelopment cost incurred in current year				112,000,000	114,000,000	$ 98,000,000
Non-proprietary improvements sold and transferred				132,000,000
Non-proprietary improvements sold and transferred in current period				21,000,000
Proceeds for non-proprietary improvements not yet ready for use				88,000,000
American Airlines, Inc. | EETC Leveraged Lease Financings
Long-term Purchase Commitment [Line Items]
Operating lease liabilities				20,000,000
American Airlines, Inc. | Special Facility Revenue Bonds
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted				555,000,000
American Airlines, Inc. | Secured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt				31,785,000,000	28,731,000,000
American Airlines, Inc. | Enhanced Equipment Trust Certificates (EETC) | Secured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt				9,357,000,000	11,013,000,000
American Airlines, Inc. | Special Facility Revenue Bonds | Secured Debt
Long-term Purchase Commitment [Line Items]
Long-term debt				1,129,000,000	$ 1,040,000,000
American Airlines, Inc. | PSP1 Promissory Note | Unsecured Debt
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted				1,800,000,000
American Airlines, Inc. | Senior Notes 5.000% Due 2022 | Unsecured Debt
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted				750,000,000
American Airlines, Inc. | Senior Notes 3.75% Matures 2025 | Unsecured Debt
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted				$ 500,000,000
Fixed interest rate per annum				3.75%
American Airlines, Inc. | Senior Notes 6.50% Due 2025 | Unsecured Debt
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted				$ 1,000,000,000
Fixed interest rate per annum				6.50%