Revenue Recognition - Passenger Revenue by Geographic Region (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Airline Destination Disclosure [Line Items]
Operating revenues	$ 11,960	$ 11,643	$ 22,544	$ 22,044
Passenger [Member]
Airline Destination Disclosure [Line Items]
Operating revenues	11,011	10,674	20,669	20,154
Passenger [Member] | Domestic [Member]
Airline Destination Disclosure [Line Items]
Operating revenues	8,009	7,685	15,235	14,648
Passenger [Member] | Latin America [Member]
Airline Destination Disclosure [Line Items]
Operating revenues	1,241	1,284	2,612	2,729
Passenger [Member] | Atlantic [Member]
Airline Destination Disclosure [Line Items]
Operating revenues	1,407	1,298	2,080	1,967
Passenger [Member] | Pacific [Member]
Airline Destination Disclosure [Line Items]
Operating revenues	354	407	742	810
American Airlines, Inc. [Member]
Airline Destination Disclosure [Line Items]
Operating revenues	11,958	11,640	22,539	22,038
American Airlines, Inc. [Member] | Passenger [Member]
Airline Destination Disclosure [Line Items]
Operating revenues	11,011	10,674	20,669	20,154
American Airlines, Inc. [Member] | Passenger [Member] | Domestic [Member]
Airline Destination Disclosure [Line Items]
Operating revenues	8,009	7,685	15,235	14,648
American Airlines, Inc. [Member] | Passenger [Member] | Latin America [Member]
Airline Destination Disclosure [Line Items]
Operating revenues	1,241	1,284	2,612	2,729
American Airlines, Inc. [Member] | Passenger [Member] | Atlantic [Member]
Airline Destination Disclosure [Line Items]
Operating revenues	1,407	1,298	2,080	1,967
American Airlines, Inc. [Member] | Passenger [Member] | Pacific [Member]
Airline Destination Disclosure [Line Items]
Operating revenues	$ 354	$ 407	$ 742	$ 810