Employee Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1	$ 1	$ 2	$ 2
Interest cost	139	131	277	262
Expected return on assets	(285)	(271)	(569)	(543)
Special termination benefits			0	0
Amortization of:
Prior service cost (benefit)	7	7	14	14
Unrecognized net loss (gain)	38	52	77	105
Net periodic benefit income	(100)	(80)	(199)	(160)
Retiree Medical and Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	3	3	7	5
Interest cost	7	8	15	14
Expected return on assets	(3)	(3)	(6)	(6)
Special termination benefits			0	139
Amortization of:
Prior service cost (benefit)	(3)	(3)	(7)	(7)
Unrecognized net loss (gain)	(6)	(6)	(12)	(11)
Net periodic benefit income	(2)	(1)	(3)	134
American Airlines, Inc. | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	2	2
Interest cost	138	130	275	261
Expected return on assets	(283)	(270)	(567)	(540)
Special termination benefits			0	0
Amortization of:
Prior service cost (benefit)	7	7	14	14
Unrecognized net loss (gain)	38	52	77	104
Net periodic benefit income	(99)	(80)	(199)	(159)
American Airlines, Inc. | Retiree Medical and Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	3	3	7	5
Interest cost	7	8	15	14
Expected return on assets	(3)	(3)	(6)	(6)
Special termination benefits			0	139
Amortization of:
Prior service cost (benefit)	(3)	(3)	(7)	(7)
Unrecognized net loss (gain)	(6)	(6)	(12)	(11)
Net periodic benefit income	$ (2)	$ (1)	$ (3)	$ 134