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Transactions with Related Parties - Net Receivables (Payables) to Related Parties (Details) - USD ($) $ in Millions		12 Months Ended
	Jul. 01, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Jun. 30, 2020
Related Party Transaction [Line Items]
AAG's wholly-owned subsidiaries		$ (2,840)	$ (2,455)
Regional expenses		$ 5,448	5,042	$ 4,643
Convertible Senior Notes 6.50% Due 2025 \| Senior Notes
Related Party Transaction [Line Items]
Settlement of convertible debt	$ 1,000
Fixed interest rate per annum		6.50%			6.50%
American Airlines, Inc.
Related Party Transaction [Line Items]
AAG's wholly-owned subsidiaries		$ (2,717)	(2,372)
Total		9,896	8,187
Regional expenses		$ 5,406	5,009	$ 4,619
American Airlines, Inc. \| Convertible Senior Notes 6.50% Due 2025 \| Senior Notes
Related Party Transaction [Line Items]
Fixed interest rate per annum		6.50%
American Airlines, Inc. \| AAG
Related Party Transaction [Line Items]
AAG		$ 11,938	10,258
American Airlines, Inc. \| AAG \| Convertible Senior Notes 6.50% Due 2025 \| Senior Notes
Related Party Transaction [Line Items]
Settlement of convertible debt		$ 1,000
Fixed interest rate per annum		6.50%
American Airlines, Inc. \| AAG's Wholly-owned Subsidiaries
Related Party Transaction [Line Items]
AAG's wholly-owned subsidiaries		$ (2,042)	$ (2,071)