Basis of Presentation and Summary of Significant Accounting Policies - Significant Categories of Reported Operating Revenues (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue from External Customer [Line Items]
Total operating revenues	$ 48,971	$ 29,882	$ 17,337
Passenger
Revenue from External Customer [Line Items]
Total operating revenues	44,568	26,063	14,518
Passenger travel
Revenue from External Customer [Line Items]
Total operating revenues	41,425	23,896	13,456
Loyalty revenue - travel
Revenue from External Customer [Line Items]
Total operating revenues	3,143	2,167	1,062
Cargo
Revenue from External Customer [Line Items]
Total operating revenues	1,233	1,314	769
Other
Revenue from External Customer [Line Items]
Total operating revenues	3,170	2,505	2,050
Loyalty revenue - marketing services
Revenue from External Customer [Line Items]
Total operating revenues	2,657	2,166	1,825
Other revenue
Revenue from External Customer [Line Items]
Total operating revenues	513	339	225
American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	48,965	29,880	17,335
American Airlines, Inc. | Passenger
Revenue from External Customer [Line Items]
Total operating revenues	44,568	26,063	14,518
American Airlines, Inc. | Passenger travel
Revenue from External Customer [Line Items]
Total operating revenues	41,425	23,896	13,456
American Airlines, Inc. | Loyalty revenue - travel
Revenue from External Customer [Line Items]
Total operating revenues	3,143	2,167	1,062
American Airlines, Inc. | Cargo
Revenue from External Customer [Line Items]
Total operating revenues	1,233	1,314	769
American Airlines, Inc. | Other
Revenue from External Customer [Line Items]
Total operating revenues	3,164	2,503	2,048
American Airlines, Inc. | Loyalty revenue - marketing services
Revenue from External Customer [Line Items]
Total operating revenues	2,657	2,166	1,825
American Airlines, Inc. | Other revenue
Revenue from External Customer [Line Items]
Total operating revenues	$ 507	$ 337	$ 223