Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Non-cash investing and financing activities:
Settlement of bankruptcy obligations	$ 7	$ 0	$ 15
Equity Investment	0	0	120
Supplemental information:
Interest paid, net	1,111	1,091	1,040
Income taxes paid	8	18	20
American Airlines, Inc. [Member]
Non-cash investing and financing activities:
Settlement of bankruptcy obligations	7	0	15
Equity Investment	0	0	120
Supplemental information:
Interest paid, net	1,025	1,009	942
Income taxes paid	$ 8	$ 16	$ 18