Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Amortizable Intangible Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	$ (502)	$ (447)
Total	440	496
American Airlines, Inc. [Member]
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	(502)	(447)
Total	440	496
Domestic Airport Slots [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross	365	365
Domestic Airport Slots [Member] | American Airlines, Inc. [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross	365	365
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross	300	300
Customer Relationships [Member] | American Airlines, Inc. [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross	300	300
Marketing Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross	105	105
Marketing Agreements [Member] | American Airlines, Inc. [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross	105	105
Tradenames [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross	35	35
Tradenames [Member] | American Airlines, Inc. [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross	35	35
Airport Gate Leasehold Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross	137	138
Airport Gate Leasehold Rights [Member] | American Airlines, Inc. [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross	$ 137	$ 138