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Employee Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 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 March 31,2025202420252024
Service cost$1 $— $6 $8 
Interest cost183 181 18 17 
Expected return on assets(232)(244)(2)(2)
Amortization of:
Prior service cost— — 4 3 
Unrecognized net loss (gain)24 27 (6)(6)
Net periodic benefit cost (income)$(24)$(36)$20 $20 
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 March 31,2025202420252024
Service cost$1 $— $6 $8 
Interest cost182 180 18 17 
Expected return on assets(231)(243)(2)(2)
Amortization of:
Prior service cost— — 4 3 
Unrecognized net loss (gain)24 27 (6)(6)
Net periodic benefit cost (income)$(24)$(36)$20 $20