Revenue Recognition - Significant Categories of Reported Operating Revenues (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenue from External Customer [Line Items]
Total operating revenues	$ 13,647	$ 13,482	$ 40,551	$ 39,726
American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	13,645	13,481	40,546	39,723
Passenger
Revenue from External Customer [Line Items]
Total operating revenues	12,523	12,421	37,184	36,502
Passenger | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	12,523	12,421	37,184	36,502
Passenger travel
Revenue from External Customer [Line Items]
Total operating revenues	11,539	11,473	34,334	33,821
Passenger travel | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	11,539	11,473	34,334	33,821
Loyalty revenue - travel
Revenue from External Customer [Line Items]
Total operating revenues	984	948	2,850	2,681
Loyalty revenue - travel | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	984	948	2,850	2,681
Cargo
Revenue from External Customer [Line Items]
Total operating revenues	202	193	584	613
Cargo | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	202	193	584	613
Other
Revenue from External Customer [Line Items]
Total operating revenues	922	868	2,783	2,611
Other | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	920	867	2,778	2,608
Loyalty revenue - marketing services
Revenue from External Customer [Line Items]
Total operating revenues	779	732	2,363	2,195
Loyalty revenue - marketing services | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	779	732	2,363	2,195
Other revenue
Revenue from External Customer [Line Items]
Total operating revenues	143	136	420	416
Other revenue | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	$ 141	$ 135	$ 415	$ 413