Employee Benefit Plans - Schedule of Expected Future Service Benefit Payments (Details) $ in Millions	Dec. 31, 2025 USD ($)
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
2026	$ 984
2027	999
2028	1,012
2029	1,023
2030	1,029
2031-2035	5,113
Retiree Medical and Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
2026	136
2027	138
2028	140
2029	139
2030	137
2031-2035	610
American Airlines, Inc. \| Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
2026	979
2027	993
2028	1,006
2029	1,016
2030	1,023
2031-2035	5,078
American Airlines, Inc. \| Retiree Medical and Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
2026	135
2027	138
2028	140
2029	139
2030	137
2031-2035	$ 609

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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