Basis of Presentation and Summary of Significant Accounting Policies - Components of Regional Expenses (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Regional Expenses [Line Items]
Aircraft fuel and related taxes			$ 6,226	$ 10,592	$ 7,839
Salaries, wages and benefits			9,524	8,508	5,460
Maintenance, materials and repairs			1,889	2,051	1,260
Other rent and landing fees			1,731	1,727	1,152
Aircraft rent			1,250	1,250	768
Selling expenses			1,394	1,544	1,158
Depreciation and amortization			1,364	1,295	853
Special items, net	$ 2,000	$ 507	1,051	800	559
Other			4,374	4,118	2,969
Total regional expenses			5,983	6,516	3,326
American Airlines, Inc. [Member]
Regional Expenses [Line Items]
Aircraft fuel and related taxes			6,226	10,592	7,839
Salaries, wages and benefits			9,514	8,499	5,452
Maintenance, materials and repairs			1,889	2,051	1,260
Other rent and landing fees			1,731	1,727	1,152
Aircraft rent			1,250	1,250	768
Selling expenses			1,394	1,544	1,158
Depreciation and amortization			1,364	1,301	853
Special items, net	$ 2,500	$ 495	1,051	783	559
Other			4,378	4,186	3,007
Total regional expenses			6,098	6,564	3,293
Regional Carrier [Member]
Regional Expenses [Line Items]
Aircraft fuel and related taxes			1,230	2,009	1,120
Salaries, wages and benefits			1,187	1,140	692
Capacity purchases from third-party regional carriers			1,591	1,475	269
Maintenance, materials and repairs			305	367	284
Other rent and landing fees			476	419	236
Aircraft rent			7	35	4
Selling expenses			333	307	154
Depreciation and amortization			243	217	168
Special items, net			29	24	8
Other			582	523	391
Total regional expenses			5,983	6,516	3,326
Regional Carrier [Member] | American Airlines, Inc. [Member]
Regional Expenses [Line Items]
Aircraft fuel and related taxes			1,230	2,009	1,119
Salaries, wages and benefits			276	228	29
Capacity purchases from third-party regional carriers			3,246	3,187	1,359
Maintenance, materials and repairs			1	6
Other rent and landing fees			436	386	217
Selling expenses			333	307	153
Depreciation and amortization			197	168	150
Special items, net			18	5
Other			361	268	266
Total regional expenses			$ 6,098	$ 6,564	$ 3,293