Revenue Recognition - Significant Categories of Reported Operating Revenues (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue from External Customer [Line Items]
Total operating revenues	$ 13,482	$ 13,462	$ 39,726	$ 35,783
American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	13,481	13,461	39,723	35,778
Passenger
Revenue from External Customer [Line Items]
Total operating revenues	12,421	12,396	36,502	32,438
Passenger | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	12,421	12,396	36,502	32,438
Passenger travel
Revenue from External Customer [Line Items]
Total operating revenues	11,473	11,536	33,821	30,150
Passenger travel | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	11,473	11,536	33,821	30,150
Loyalty revenue - travel
Revenue from External Customer [Line Items]
Total operating revenues	948	860	2,681	2,288
Loyalty revenue - travel | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	948	860	2,681	2,288
Cargo
Revenue from External Customer [Line Items]
Total operating revenues	193	279	613	970
Cargo | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	193	279	613	970
Other
Revenue from External Customer [Line Items]
Total operating revenues	868	787	2,611	2,375
Other | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	867	786	2,608	2,370
Loyalty revenue - marketing services
Revenue from External Customer [Line Items]
Total operating revenues	732	655	2,195	1,991
Loyalty revenue - marketing services | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	732	655	2,195	1,991
Other revenue
Revenue from External Customer [Line Items]
Total operating revenues	136	132	416	384
Other revenue | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	$ 135	$ 131	$ 413	$ 379