Revenue Recognition - Significant Categories of Reported Operating Revenues (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Revenue from External Customer [Line Items]
Total operating revenues	$ 13,912	$ 12,551
American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	13,911	12,549
Passenger
Revenue from External Customer [Line Items]
Total operating revenues	12,495	11,391
Passenger | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	12,495	11,391
Passenger travel
Revenue from External Customer [Line Items]
Total operating revenues	11,515	10,475
Passenger travel | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	11,515	10,475
Loyalty revenue - travel
Revenue from External Customer [Line Items]
Total operating revenues	980	916
Loyalty revenue - travel | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	980	916
Cargo
Revenue from External Customer [Line Items]
Total operating revenues	214	189
Cargo | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	214	189
Other
Revenue from External Customer [Line Items]
Total operating revenues	1,203	971
Other | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	1,202	969
Loyalty revenue - marketing services
Revenue from External Customer [Line Items]
Total operating revenues	1,027	823
Loyalty revenue - marketing services | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	1,027	823
Other revenue
Revenue from External Customer [Line Items]
Total operating revenues	176	148
Other revenue | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	$ 175	$ 146