Employee Benefit Plans - Schedule of Changes in Fair Value of Plan Assets (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Jan. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Benefits
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of period	$ 13,557	$ 14,691	$ 13,557
Actual return (loss) on plan assets		(1,943)	1,710
Employer contributions	241	5	247
Settlements		0	(1)
Benefit payments		(869)	(822)
Fair value of plan assets at end of period		11,884	14,691	$ 13,557
Funded status at end of period		(2,153)	(4,219)
Special termination benefits		0	0	0
Contributions expected to be deferred under CARES Act				130
Retiree Medical and  Other Postretirement Benefits
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of period	170	167	170
Actual return (loss) on plan assets		(18)	21
Employer contributions		58	48
Settlements		0	0
Benefit payments		(74)	(72)
Fair value of plan assets at end of period		133	167	170
Funded status at end of period		(773)	(931)
Special termination benefits		0	139	410
Increase in postretirement benefit obligation			139
American Airlines, Inc. | Pension Benefits
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of period	13,477	14,605	13,477
Actual return (loss) on plan assets		(1,924)	1,700
Employer contributions	241	4	247
Settlements		0	(1)
Benefit payments		(864)	(818)
Fair value of plan assets at end of period		11,821	14,605	13,477
Funded status at end of period		(2,127)	(4,186)
Special termination benefits		0	0	0
Contributions expected to be deferred under CARES Act				130
American Airlines, Inc. | Retiree Medical and  Other Postretirement Benefits
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of period	$ 170	167	170
Actual return (loss) on plan assets		(18)	21
Employer contributions		58	48
Settlements		0	0
Benefit payments		(74)	(72)
Fair value of plan assets at end of period		133	167	170
Funded status at end of period		(773)	(931)
Special termination benefits		$ 0	139	$ 410
Increase in postretirement benefit obligation			$ 139