v3.26.3
Income Taxes (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Tax Credit Carryforward [Line Items]          
Other carryforwards         $ 6,000
Income tax benefit $ 65 $ 28 $ 122 $ (36)  
American Airlines, Inc.          
Tax Credit Carryforward [Line Items]          
Other carryforwards         3,800
Income tax benefit $ 32 $ (5) $ 26 $ (128)  
Federal          
Tax Credit Carryforward [Line Items]          
NOL carryforwards         11,900
Operating loss carryforwards and other carryforwards, subject to expiration         1,600
Operating loss carryforwards and other carryforwards, not subject to expiration         16,300
Federal | American Airlines, Inc.          
Tax Credit Carryforward [Line Items]          
NOL carryforwards         11,700
Operating loss carryforwards and other carryforwards, subject to expiration         1,800
Operating loss carryforwards and other carryforwards, not subject to expiration         13,700
State          
Tax Credit Carryforward [Line Items]          
NOL carryforwards         5,000
State | American Airlines, Inc.          
Tax Credit Carryforward [Line Items]          
NOL carryforwards         $ 4,700