Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Non-cash investing and financing activities:
ROU assets acquired through operating leases	$ 1,180	$ 1,483	$ 1,386
Property and equipment acquired through debt, finance leases and other	317	46	180
Finance leases converted to operating leases	42	3	0
Operating leases converted to finance leases	5	107	102
Settlement of bankruptcy obligations	4	0	(1)
Equity investments	0	12	88
Supplemental information:
Interest paid, net	2,180	1,852	1,632
Income taxes paid	6	2	3
American Airlines, Inc.
Non-cash investing and financing activities:
ROU assets acquired through operating leases	1,172	1,448	1,381
Property and equipment acquired through debt, finance leases and other	317	46	180
Finance leases converted to operating leases	42	3	0
Operating leases converted to finance leases	5	107	102
Settlement of bankruptcy obligations	4	0	4
Equity investments	0	12	88
Supplemental information:
Interest paid, net	2,058	1,716	1,481
Income taxes paid	$ 6	$ 2	$ 2