Revenue Recognition - Passenger Revenue by Geographic Region (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Airline Destination Disclosure [Line Items]
Operating revenues	$ 8,515	$ 10,584
Passenger [Member]
Airline Destination Disclosure [Line Items]
Operating revenues	7,681	9,658
Passenger [Member] | Domestic [Member]
Airline Destination Disclosure [Line Items]
Operating revenues	5,780	7,226
Passenger [Member] | Latin America [Member]
Airline Destination Disclosure [Line Items]
Operating revenues	1,180	1,371
Passenger [Member] | Atlantic [Member]
Airline Destination Disclosure [Line Items]
Operating revenues	523	673
Passenger [Member] | Pacific [Member]
Airline Destination Disclosure [Line Items]
Operating revenues	198	388
American Airlines, Inc. [Member]
Airline Destination Disclosure [Line Items]
Operating revenues	8,514	10,581
American Airlines, Inc. [Member] | Passenger [Member]
Airline Destination Disclosure [Line Items]
Operating revenues	7,681	9,658
American Airlines, Inc. [Member] | Passenger [Member] | Domestic [Member]
Airline Destination Disclosure [Line Items]
Operating revenues	5,780	7,226
American Airlines, Inc. [Member] | Passenger [Member] | Latin America [Member]
Airline Destination Disclosure [Line Items]
Operating revenues	1,180	1,371
American Airlines, Inc. [Member] | Passenger [Member] | Atlantic [Member]
Airline Destination Disclosure [Line Items]
Operating revenues	523	673
American Airlines, Inc. [Member] | Passenger [Member] | Pacific [Member]
Airline Destination Disclosure [Line Items]
Operating revenues	$ 198	$ 388