Basis of Presentation and Recent Accounting Pronouncements (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income	$ 425	$ 662	$ 185	$ 372	$ 556	$ 159	$ 1,272	$ 1,088
Tax Act - reclassification of stranded tax effects from accumulated other comprehensive loss to retained earnings	622
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income				31				6
American Airlines, Inc. [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income	508	$ 714	$ 230	433	$ 609	$ 209	$ 1,452	1,251
Tax Act - reclassification of stranded tax effects from accumulated other comprehensive loss to retained earnings	$ 622
American Airlines, Inc. [Member] | Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income				$ 31				$ 6