v3.26.3
Accumulated Other Comprehensive Loss - Reclassifications out of AOCI (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2026
Sep. 30, 2025
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Nonoperating other income (expense), net $ 449     $ 293     $ 1,223 $ 967
Total reclassifications for the period, net of tax 269 $ (71) $ 382 114 $ (599) $ 473 580 (12)
American Airlines, Inc.                
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Nonoperating other income (expense), net 297     152     792 570
Total reclassifications for the period, net of tax 151 $ (194) $ 274 (10) $ (718) $ 384 231 (344)
Amounts reclassified from AOCI                
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Total reclassifications for the period, net of tax 15     15     47 50
Amounts reclassified from AOCI | American Airlines, Inc.                
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Total reclassifications for the period, net of tax 15     15     47 50
Amounts reclassified from AOCI | Prior service cost                
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Nonoperating other income (expense), net 3     3     10 10
Amounts reclassified from AOCI | Prior service cost | American Airlines, Inc.                
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Nonoperating other income (expense), net 3     3     10 10
Amounts reclassified from AOCI | Actuarial loss                
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Nonoperating other income (expense), net 12     12     37 40
Amounts reclassified from AOCI | Actuarial loss | American Airlines, Inc.                
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Nonoperating other income (expense), net $ 12     $ 12     $ 37 $ 40