Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Future Amortization Expense (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
2016	$ 50
2017	46
2018	42
2019	42
2020	42
2021 and thereafter	218
Total	440	$ 496
American Airlines, Inc. [Member]
Finite-Lived Intangible Assets [Line Items]
2016	50
2017	46
2018	42
2019	42
2020	42
2021 and thereafter	218
Total	$ 440	$ 496