Debt - Summary of EETCs (Details) - American Airlines, Inc. - Enhanced Equipment Trust Certificates (EETC) $ in Millions	Sep. 30, 2026 USD ($)
2025-1 Aircraft EETCs, Series A
Debt Instrument [Line Items]
Aggregate principal issued	$ 884
Fixed interest rate per annum	4.90%
2025-1 Aircraft EETCs, Series B
Debt Instrument [Line Items]
Aggregate principal issued	$ 221
Fixed interest rate per annum	5.65%
2026-1 Aircraft EEETCs, Series A
Debt Instrument [Line Items]
Aggregate principal issued	$ 905
Fixed interest rate per annum	5.25%
2026-1 Aircraft EEETCs, Series B
Debt Instrument [Line Items]
Aggregate principal issued	$ 236
Fixed interest rate per annum	5.75%
2026-2 Aircraft EETCs, Series A
Debt Instrument [Line Items]
Aggregate principal issued	$ 1,100
Remaining escrowed proceeds	$ 502
Fixed interest rate per annum	5.70%
2026-2 Aircraft EETCs, Series B
Debt Instrument [Line Items]
Aggregate principal issued	$ 274
Remaining escrowed proceeds	$ 131
Fixed interest rate per annum	6.30%

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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