Income Taxes - Reconciliation of Income Tax Provision (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Line Items]
Statutory income tax provision (benefit)	$ (535)	$ (2,405)	$ 474
State income tax provision (benefit), net of federal tax effect	(37)	(183)	47
Book expenses not deductible for tax purposes	23	22	31
Foreign income taxes, net of federal tax effect	0	0	8
Change in valuation allowance	0	0	4
Other, net	(6)	(2)	6
Total income tax provision (benefit)	(555)	(2,568)	570
American Airlines, Inc.
Income Tax Disclosure [Line Items]
Statutory income tax provision (benefit)	(478)	(2,290)	547
State income tax provision (benefit), net of federal tax effect	(37)	(181)	41
Book expenses not deductible for tax purposes	21	20	29
Foreign income taxes, net of federal tax effect	0	0	8
Change in valuation allowance	0	0	5
Other, net	(6)	(2)	3
Total income tax provision (benefit)	$ (500)	$ (2,453)	$ 633