Employee Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1	$ 1	$ 2	$ 1
Interest cost	154	176	307	352
Expected return on assets	(252)	(204)	(505)	(406)
Settlements	4	0	4	0
Amortization of:
Prior service cost (benefit)	7	7	14	14
Unrecognized net loss (gain)	41	38	83	76
Net periodic benefit cost (income)	(45)	18	(95)	37
2020 contributions expected to be deferred under CARES Act	196		196
Retiree Medical and Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	1	3	2
Interest cost	8	8	14	17
Expected return on assets	(3)	(4)	(6)	(8)
Settlements	0	0	0	0
Amortization of:
Prior service cost (benefit)	(52)	(59)	(106)	(118)
Unrecognized net loss (gain)	(5)	(8)	(12)	(16)
Net periodic benefit cost (income)	(50)	(62)	(107)	(123)
American Airlines, Inc. [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	1	1
Interest cost	153	175	306	350
Expected return on assets	(251)	(203)	(503)	(405)
Settlements	4	0	4	0
Amortization of:
Prior service cost (benefit)	7	7	14	14
Unrecognized net loss (gain)	41	38	83	76
Net periodic benefit cost (income)	(45)	18	(95)	36
2020 contributions expected to be deferred under CARES Act	193		193
American Airlines, Inc. [Member] | Retiree Medical and Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	1	3	2
Interest cost	8	8	14	17
Expected return on assets	(3)	(4)	(6)	(8)
Settlements	0	0	0	0
Amortization of:
Prior service cost (benefit)	(52)	(59)	(106)	(118)
Unrecognized net loss (gain)	(5)	(8)	(12)	(16)
Net periodic benefit cost (income)	$ (50)	$ (62)	$ (107)	$ (123)