Income Taxes - Components of Income Tax Provision (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current income tax provision:
State and Local	$ 2	$ 3	$ 10
Foreign	8	29	14
Current income tax provision	10	32	24
Deferred income tax provision:
Federal	498	390	2,026
State and Local	62	50	63
Deferred income tax provision	560	440	2,089
Total income tax provision	570	472	2,113
American Airlines, Inc. [Member]
Current income tax provision:
State and Local	2	3	14
Foreign	8	28	10
Current income tax provision	10	31	24
Deferred income tax provision:
Federal	567	453	2,176
State and Local	56	50	70
Deferred income tax provision	623	503	2,246
Total income tax provision	$ 633	$ 534	$ 2,270