Basis of Presentation and Summary of Significant Accounting Policies - Significant Categories of Reported Operating Revenues (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue from External Customer [Line Items]
Total operating revenues	$ 29,882	$ 17,337	$ 45,768
Passenger
Revenue from External Customer [Line Items]
Total operating revenues	26,063	14,518	42,010
Passenger travel
Revenue from External Customer [Line Items]
Total operating revenues	23,896	13,456	38,831
Loyalty revenue - travel
Revenue from External Customer [Line Items]
Total operating revenues	2,167	1,062	3,179
Cargo
Revenue from External Customer [Line Items]
Total operating revenues	1,314	769	863
Other
Revenue from External Customer [Line Items]
Total operating revenues	2,505	2,050	2,895
Loyalty revenue - marketing services
Revenue from External Customer [Line Items]
Total operating revenues	2,166	1,825	2,361
Loyalty Program, Co-branded Credit Card and Other Partners
Revenue from External Customer [Line Items]
Total operating revenues	3,400	2,900	3,900
Other revenue
Revenue from External Customer [Line Items]
Total operating revenues	339	225	534
American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	29,880	17,335	45,761
American Airlines, Inc. | Passenger
Revenue from External Customer [Line Items]
Total operating revenues	26,063	14,518	42,010
American Airlines, Inc. | Passenger travel
Revenue from External Customer [Line Items]
Total operating revenues	23,896	13,456	38,831
American Airlines, Inc. | Loyalty revenue - travel
Revenue from External Customer [Line Items]
Total operating revenues	2,167	1,062	3,179
American Airlines, Inc. | Cargo
Revenue from External Customer [Line Items]
Total operating revenues	1,314	769	863
American Airlines, Inc. | Other
Revenue from External Customer [Line Items]
Total operating revenues	2,503	2,048	2,888
American Airlines, Inc. | Loyalty revenue - marketing services
Revenue from External Customer [Line Items]
Total operating revenues	2,166	1,825	2,361
American Airlines, Inc. | Loyalty Program, Co-branded Credit Card and Other Partners
Revenue from External Customer [Line Items]
Total operating revenues	3,400	2,900	3,900
American Airlines, Inc. | Other revenue
Revenue from External Customer [Line Items]
Total operating revenues	$ 337	$ 223	$ 527