Revenue Recognition - Significant Categories of Reported Operating Revenues (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenue from External Customer [Line Items]
Total operating revenues	$ 12,570	$ 12,189
American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	12,569	12,188
Passenger
Revenue from External Customer [Line Items]
Total operating revenues	11,458	11,103
Passenger | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	11,458	11,103
Passenger travel
Revenue from External Customer [Line Items]
Total operating revenues	10,582	10,291
Passenger travel | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	10,582	10,291
Loyalty revenue - travel
Revenue from External Customer [Line Items]
Total operating revenues	876	812
Loyalty revenue - travel | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	876	812
Cargo
Revenue from External Customer [Line Items]
Total operating revenues	187	223
Cargo | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	187	223
Other
Revenue from External Customer [Line Items]
Total operating revenues	925	863
Other | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	924	862
Loyalty revenue - marketing services
Revenue from External Customer [Line Items]
Total operating revenues	786	722
Loyalty revenue - marketing services | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	786	722
Other revenue
Revenue from External Customer [Line Items]
Total operating revenues	139	141
Other revenue | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	$ 138	$ 140