Revenue Recognition - Significant Categories of Reported Operating Revenues (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue from External Customer [Line Items]
Operating revenues	$ 1,622	$ 11,960	$ 10,137	$ 22,544
Passenger [Member]
Revenue from External Customer [Line Items]
Operating revenues	1,108	11,011	8,788	20,669
Passenger travel [Member]
Revenue from External Customer [Line Items]
Operating revenues	1,006	10,217	8,085	18,989
Loyalty revenue - travel [Member]
Revenue from External Customer [Line Items]
Operating revenues	102	794	703	1,680
Cargo [Member]
Revenue from External Customer [Line Items]
Operating revenues	130	221	277	439
Other [Member]
Revenue from External Customer [Line Items]
Operating revenues	384	728	1,072	1,436
Loyalty revenue - marketing services [Member]
Revenue from External Customer [Line Items]
Operating revenues	356	594	927	1,172
Other revenue [Member]
Revenue from External Customer [Line Items]
Operating revenues	28	134	145	264
American Airlines, Inc. [Member]
Revenue from External Customer [Line Items]
Operating revenues	1,622	11,958	10,136	22,539
American Airlines, Inc. [Member] | Passenger [Member]
Revenue from External Customer [Line Items]
Operating revenues	1,108	11,011	8,788	20,669
American Airlines, Inc. [Member] | Passenger travel [Member]
Revenue from External Customer [Line Items]
Operating revenues	1,006	10,217	8,085	18,989
American Airlines, Inc. [Member] | Loyalty revenue - travel [Member]
Revenue from External Customer [Line Items]
Operating revenues	102	794	703	1,680
American Airlines, Inc. [Member] | Cargo [Member]
Revenue from External Customer [Line Items]
Operating revenues	130	221	277	439
American Airlines, Inc. [Member] | Other [Member]
Revenue from External Customer [Line Items]
Operating revenues	384	726	1,071	1,431
American Airlines, Inc. [Member] | Loyalty revenue - marketing services [Member]
Revenue from External Customer [Line Items]
Operating revenues	356	594	927	1,172
American Airlines, Inc. [Member] | Other revenue [Member]
Revenue from External Customer [Line Items]
Operating revenues	$ 28	$ 132	$ 144	$ 259