Accumulated Other Comprehensive Loss - Reclassifications out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Nonoperating other income (expense), net	$ 173		$ 271		$ 515	$ 400
Net income (loss)	2,067	$ 2,241	(662)	$ (185)	4,308	(847)
American Airlines, Inc. [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Nonoperating other income (expense), net	91		176		352	217
Net income (loss)	1,968	$ 2,169	(714)	$ (230)	4,137	(944)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)	(4)		(18)		(13)	(34)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Prior service benefit [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Nonoperating other income (expense), net	(34)		(41)		(71)	(81)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Actuarial loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Nonoperating other income (expense), net	30		23		58	47
Reclassification out of Accumulated Other Comprehensive Income [Member] | American Airlines, Inc. [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)	(4)		(18)		(14)	(34)
Reclassification out of Accumulated Other Comprehensive Income [Member] | American Airlines, Inc. [Member] | Prior service benefit [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Nonoperating other income (expense), net	(34)		(41)		(71)	(81)
Reclassification out of Accumulated Other Comprehensive Income [Member] | American Airlines, Inc. [Member] | Actuarial loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Nonoperating other income (expense), net	$ 30		$ 23		$ 57	$ 47