Employee Benefit Plans - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Increase (decrease) for plan amendment		$ (313)	$ (1,900)
Average remaining life expectancy of retirees		13 years
Defined benefit plan, prior service cost remines to be amortized	$ 195
American Airlines, Inc.
Defined Benefit Plan Disclosure [Line Items]
Increase (decrease) for plan amendment	(313)		$ (1,900)
Average remaining life expectancy of retirees		13 years
Defined benefit plan, prior service cost remines to be amortized	$ 195