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Employee Benefit Plans (Tables)
 9 Months Ended
Sep. 30, 2025
Defined Benefit Plan Disclosure [Line Items]  
Schedule of Net Periodic Benefit Cost (Income)
The following table provides the components of net periodic benefit cost (income) (in millions):
 Pension BenefitsRetiree Medical and Other
Postretirement Benefits
Three Months Ended September 30,2025202420252024
Service cost$1 $— $6 $8 
Interest cost180 180 18 17 
Expected return on assets(232)(245)(2)(2)
Amortization of:
Prior service cost— — 4 3 
Unrecognized net loss (gain)21 26 (6)(6)
Net periodic benefit cost (income)$(30)$(39)$20 $20 
 Pension BenefitsRetiree Medical and Other
Postretirement Benefits
Nine Months Ended September 30,2025202420252024
Service cost$2 $1 $18 $23 
Interest cost547 542 53 51 
Expected return on assets(696)(733)(7)(7)
Amortization of:
Prior service cost— — 13 11 
Unrecognized net loss (gain)68 79 (17)(19)
Net periodic benefit cost (income)$(79)$(111)$60 $59 
American Airlines, Inc.  
Defined Benefit Plan Disclosure [Line Items]  
Schedule of Net Periodic Benefit Cost (Income)
The following table provides the components of net periodic benefit cost (income) (in millions):
 Pension BenefitsRetiree Medical and Other
Postretirement Benefits
Three Months Ended September 30,2025202420252024
Service cost$1 $— $6 $8 
Interest cost179 178 18 17 
Expected return on assets(231)(243)(2)(2)
Amortization of:
Prior service cost— — 4 3 
Unrecognized net loss (gain)21 26 (6)(6)
Net periodic benefit cost (income)$(30)$(39)$20 $20 
 Pension BenefitsRetiree Medical and Other
Postretirement Benefits
Nine Months Ended September 30,2025202420252024
Service cost$2 $1 $18 $23 
Interest cost544 539 53 51 
Expected return on assets(693)(729)(7)(7)
Amortization of:
Prior service cost— — 13 11 
Unrecognized net loss (gain)68 79 (17)(19)
Net periodic benefit cost (income)$(79)$(110)$60 $59