Regional Expenses (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Regional Expenses [Line Items]
Aircraft fuel and related taxes	$ 1,570	$ 1,393	$ 4,481	$ 3,736
Salaries, wages and benefits	2,995	2,772	8,824	8,094
Maintenance, materials and repairs	487	481	1,474	1,352
Other rent and landing fees	471	463	1,363	1,342
Aircraft rent	304	299	892	908
Selling expenses	400	347	1,094	990
Depreciation and amortization	433	399	1,255	1,128
Special items, net	112	289	432	450
Other	1,220	1,182	3,575	3,386
Total regional expenses	1,654	1,538	4,848	4,488
Regional Carrier [Member]
Regional Expenses [Line Items]
Aircraft fuel and related taxes	352	303	999	801
Salaries, wages and benefits	369	337	1,074	990
Capacity purchases from third-party regional carriers	404	378	1,210	1,164
Maintenance, materials and repairs	74	82	209	264
Other rent and landing fees	159	143	466	413
Aircraft rent	9	9	26	26
Selling expenses	95	90	269	256
Depreciation and amortization	79	78	235	218
Special items, net	(5)	5	(1)	13
Other	118	113	361	343
Total regional expenses	1,654	1,538	4,848	4,488
American Airlines, Inc. [Member]
Regional Expenses [Line Items]
Aircraft fuel and related taxes	1,570	1,393	4,481	3,736
Salaries, wages and benefits	2,991	2,770	8,816	8,087
Maintenance, materials and repairs	487	481	1,474	1,352
Other rent and landing fees	471	463	1,363	1,342
Aircraft rent	304	299	892	908
Selling expenses	400	347	1,094	990
Depreciation and amortization	433	399	1,255	1,128
Special items, net	112	289	432	450
Other	1,220	1,184	3,575	3,391
Total regional expenses	1,662	1,534	4,860	4,480
American Airlines, Inc. [Member] \| Regional Carrier [Member]
Regional Expenses [Line Items]
Aircraft fuel and related taxes	352	303	999	801
Salaries, wages and benefits	85	82	246	249
Capacity purchases from third-party regional carriers	832	793	2,460	2,407
Maintenance, materials and repairs	2	1	5	4
Other rent and landing fees	152	124	449	356
Aircraft rent	7	7	20	20
Selling expenses	95	90	269	256
Depreciation and amortization	66	62	194	174
Special items, net	(1)	3	3	11
Other	72	69	215	202
Total regional expenses	$ 1,662	$ 1,534	$ 4,860	$ 4,480

Capacity Purchases

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Regional Expenses [Line Items]

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No definition available.

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Significant and non-routine operating expenses (credits) such as asset impairments and restructuring charges that may not be an indicator of future cash flows.

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No definition available.

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Maintenance costs incurred and directly related to services rendered by an entity during the reporting period. Includes the cost of inspections and repairs, materials and routine maintenance costs for all aircraft and engines.

+ References

No definition available.

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Expenses incurred related to the lease of aircraft from outside third parties that are used in the entity's business operations.

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Costs incurred related to air services provided by third-party transportation companies, including regional affiliates.

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The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
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-Section 45
-Paragraph 28
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Fuel costs incurred that are directly related to goods produced and sold and services rendered during the reporting period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2(a),(d))
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The aggregate amount of expenditures for salaries, wages, profit sharing and incentive compensation, and other employee benefits, including equity-based compensation, and pension and other postretirement benefit expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.4)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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Direct costs incurred at airports in which the entity conducts flight operations. The costs primarily consist of fees paid to the airport authority for takeoff and landing, gate space and facilities, allocations of common space such as security and other terminal costs and fuel storage facilities.

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The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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The aggregate total amount of expenses directly related to the marketing or selling of products or services.

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