Regional Expenses (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Regional Expenses [Line Items]
Aircraft fuel and related taxes	$ 1,395	$ 1,726
Salaries, wages and benefits	3,140	3,090
Maintenance, materials and repairs	629	561
Other rent and landing fees	468	503
Aircraft rent	334	327
Selling expenses	305	370
Depreciation and amortization	560	480
Special items, net	1,225	138
Other	1,177	1,251
Total regional expenses	1,924	1,763
American Airlines, Inc. [Member]
Regional Expenses [Line Items]
Aircraft fuel and related taxes	1,395	1,726
Salaries, wages and benefits	3,138	3,089
Maintenance, materials and repairs	629	561
Other rent and landing fees	468	503
Aircraft rent	334	327
Selling expenses	305	370
Depreciation and amortization	560	480
Special items, net	1,225	138
Other	1,198	1,251
Total regional expenses	1,891	1,791
Regional Carrier [Member]
Regional Expenses [Line Items]
Aircraft fuel and related taxes	389	423
Salaries, wages and benefits	471	409
Capacity purchases from third-party regional carriers	354	340
Maintenance, materials and repairs	116	93
Other rent and landing fees	152	167
Aircraft rent	6	7
Selling expenses	80	92
Depreciation and amortization	83	79
Special items, net	93	0
Other	180	153
Total regional expenses	1,924	1,763
Regional Carrier [Member] \| American Airlines, Inc. [Member]
Regional Expenses [Line Items]
Aircraft fuel and related taxes	389	423
Salaries, wages and benefits	84	80
Capacity purchases from third-party regional carriers	913	857
Maintenance, materials and repairs	4	4
Other rent and landing fees	144	160
Aircraft rent	6	7
Selling expenses	80	92
Depreciation and amortization	70	68
Special items, net	93	0
Other	108	100
Total regional expenses	1,891	1,791
Regional Carrier [Member] \| Republic Airline Inc. [Member]
Regional Expenses [Line Items]
Capacity purchases from third-party regional carriers	150	143
Regional Carrier [Member] \| Republic Airline Inc. [Member] \| American Airlines, Inc. [Member]
Regional Expenses [Line Items]
Capacity purchases from third-party regional carriers	$ 150	$ 143
Republic Airways Holdings, Inc. [Member]
Regional Expenses [Line Items]
Ownership percentage	25.00%
Republic Airways Holdings, Inc. [Member] \| American Airlines, Inc. [Member]
Regional Expenses [Line Items]
Ownership percentage	25.00%

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Regional Expenses [Line Items]

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Restructuring And Other, Net

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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.

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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 percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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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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Amount of expense for salary, wage, profit sharing; incentive and equity-based compensation; and other employee benefit.

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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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