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Employee Benefit Plans (Tables)
 6 Months Ended
Jun. 30, 2024
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 June 30,2024202320242023
Service cost$— $— $8 $3 
Interest cost181 190 17 12 
Expected return on assets(244)(229)(2)(3)
Amortization of:
Prior service cost (benefit)— 7 3 (3)
Unrecognized net loss (gain)27 27 (6)(9)
Net periodic benefit cost (income)$(36)$(5)$20 $— 
 Pension BenefitsRetiree Medical and Other
Postretirement Benefits
Six Months Ended June 30,2024202320242023
Service cost$1 $1 $16 $6 
Interest cost362 380 34 24 
Expected return on assets(489)(459)(5)(5)
Amortization of:
Prior service cost (benefit)— 14 7 (6)
Unrecognized net loss (gain)54 54 (13)(18)
Net periodic benefit cost (income)$(72)$(10)$39 $1 
American Airlines, Inc.  
Defined Benefit Plan Disclosure [Line Items]  
Schedule of Net Periodic Benefit Cost (Income)
The following table provides the components of net periodic benefit cost (income) (in millions):
 Pension BenefitsRetiree Medical and Other
Postretirement Benefits
Three Months Ended June 30,2024202320242023
Service cost$— $— $8 $3 
Interest cost180 189 17 12 
Expected return on assets(243)(228)(2)(3)
Amortization of:
Prior service cost (benefit)— 7 3 (3)
Unrecognized net loss (gain)27 27 (6)(9)
Net periodic benefit cost (income)$(36)$(5)$20 $— 
 Pension BenefitsRetiree Medical and Other
Postretirement Benefits
Six Months Ended June 30,2024202320242023
Service cost$1 $1 $16 $6 
Interest cost360 378 34 24 
Expected return on assets(487)(457)(5)(5)
Amortization of:
Prior service cost (benefit)— 14 7 (6)
Unrecognized net loss (gain)54 54 (13)(18)
Net periodic benefit cost (income)$(72)$(10)$39 $1