Accumulated Other Comprehensive Loss - Reclassifications out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Nonoperating other income (expense), net	$ 341	$ 130
Net income (loss)	2,241	(185)
American Airlines, Inc. [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Nonoperating other income (expense), net	261	41
Net income (loss)	2,169	(230)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)	(9)	(16)
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	(36)	(40)
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	27	24
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)	(9)	(16)
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	(36)	(40)
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	$ 27	$ 24