Regional Expenses (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Regional Expenses [Line Items]
Aircraft fuel and related taxes	$ 2,103	$ 1,510	$ 3,866	$ 2,912
Salaries, wages and benefits	3,093	3,037	6,111	5,898
Maintenance, materials and repairs	505	495	973	987
Other rent and landing fees	490	452	952	892
Aircraft rent	305	294	609	589
Selling expenses	385	376	742	694
Depreciation and amortization	463	418	908	822
Special items, net	152	202	347	320
Other	1,326	1,224	2,587	2,403
Total regional expenses	1,793	1,620	3,490	3,194
Regional Carrier [Member]
Regional Expenses [Line Items]
Aircraft fuel and related taxes	465	329	863	648
Salaries, wages and benefits	389	360	772	705
Capacity purchases from third-party regional carriers	364	413	717	806
Maintenance, materials and repairs	89	65	168	135
Other rent and landing fees	153	156	300	307
Aircraft rent	8	9	17	17
Selling expenses	96	94	181	174
Depreciation and amortization	82	78	165	157
Special items, net	0	1	0	4
Other	147	115	307	241
Total regional expenses	1,793	1,620	3,490	3,194
American Airlines, Inc. [Member]
Regional Expenses [Line Items]
Aircraft fuel and related taxes	2,103	1,510	3,866	2,912
Salaries, wages and benefits	3,090	3,034	6,104	5,891
Maintenance, materials and repairs	505	495	973	987
Other rent and landing fees	490	452	952	892
Aircraft rent	305	294	609	589
Selling expenses	385	376	742	694
Depreciation and amortization	463	418	908	822
Special items, net	152	202	347	320
Other	1,326	1,223	2,587	2,404
Total regional expenses	1,784	1,629	3,465	3,199
American Airlines, Inc. [Member] | Regional Carrier [Member]
Regional Expenses [Line Items]
Aircraft fuel and related taxes	465	329	863	648
Salaries, wages and benefits	87	86	169	161
Capacity purchases from third-party regional carriers	825	827	1,622	1,628
Maintenance, materials and repairs	3	2	5	3
Other rent and landing fees	147	150	288	296
Aircraft rent	7	7	14	14
Selling expenses	96	94	181	174
Depreciation and amortization	67	65	135	128
Special items, net	0	1	0	4
Other	87	68	188	143
Total regional expenses	$ 1,784	$ 1,629	$ 3,465	$ 3,199