Debt - EETCs (Details) $ in Millions	1 Months Ended	12 Months Ended
	Nov. 30, 2025 USD ($) pass_through_trust aircraft	Dec. 31, 2025 USD ($) aircraft	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt		$ 3,773	$ 1,670	$ 4,822
American Airlines, Inc.
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt		3,773	$ 1,670	$ 4,822
American Airlines, Inc. | Enhanced Equipment Trust Certificates (EETC) | 2025-1 Aircraft EETCs
Debt Instrument [Line Items]
Number of pass-through trusts | pass_through_trust	2
Aggregate principal issued	$ 1,100
Number of aircrafts delivered or to be delivered | aircraft	25
Proceeds from issuance of long-term debt		$ 978
Number of operated aircrafts | aircraft		21
Remaining escrowed proceeds		$ 127
American Airlines, Inc. | Enhanced Equipment Trust Certificates (EETC) | 2025-1 Aircraft EETCs, Series A
Debt Instrument [Line Items]
Aggregate principal issued		884
Remaining escrowed proceeds		$ 102
Fixed interest rate per annum		4.90%
American Airlines, Inc. | Enhanced Equipment Trust Certificates (EETC) | 2025-1 Aircraft EETCs, Series B
Debt Instrument [Line Items]
Aggregate principal issued		$ 221
Remaining escrowed proceeds		$ 25
Fixed interest rate per annum		5.65%