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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Tax Credit Carryforward [Line Items]          
Other carryforwards         $ 4,300
Income tax provision (benefit) $ 425 $ 127 $ 431 $ (324)  
Federal          
Tax Credit Carryforward [Line Items]          
NOL carryforwards         16,200
Operating loss carryforwards and other carryforwards, subject to expiration         5,900
Operating loss carryforwards and other carryforwards, not subject to expiration         14,600
State          
Tax Credit Carryforward [Line Items]          
NOL carryforward subject to expiration         6,000
American Airlines, Inc.          
Tax Credit Carryforward [Line Items]          
Other carryforwards         3,500
Income tax provision (benefit) $ 452 $ 140 $ 482 $ (296)  
American Airlines, Inc. | Federal          
Tax Credit Carryforward [Line Items]          
NOL carryforwards         16,100
Operating loss carryforwards and other carryforwards, subject to expiration         6,200
Operating loss carryforwards and other carryforwards, not subject to expiration         13,400
American Airlines, Inc. | State          
Tax Credit Carryforward [Line Items]          
NOL carryforward subject to expiration         $ 5,900