Regional Expenses (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Regional Expenses [Line Items]
Depreciation and amortization	$ 487	$ 491	$ 1,456	$ 1,486
Aircraft rent	342	347	1,031	1,045
American Airlines, Inc.
Regional Expenses [Line Items]
Depreciation and amortization	484	488	1,449	1,480
Aircraft rent	$ 342	347	$ 1,031	1,045
Republic Airways Holdings, Inc.
Regional Expenses [Line Items]
Ownership percentage	25.00%		25.00%
Republic Airways Holdings, Inc. \| American Airlines, Inc.
Regional Expenses [Line Items]
Ownership percentage	25.00%		25.00%
Regional operating special items, net
Regional Expenses [Line Items]
Depreciation and amortization	$ 79	81	$ 239	240
Aircraft rent	2	1	5	4
Regional operating special items, net \| American Airlines, Inc.
Regional Expenses [Line Items]
Depreciation and amortization	67	68	203	201
Aircraft rent	2	1	5	4
Regional operating special items, net \| Republic Airways Holdings Inc.
Regional Expenses [Line Items]
Capacity purchases from third-party regional carriers	153	152	489	462
Regional operating special items, net \| Republic Airways Holdings Inc. \| American Airlines, Inc.
Regional Expenses [Line Items]
Capacity purchases from third-party regional carriers	$ 153	$ 152	$ 489	$ 462

Capacity Purchases

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- Definition

Regional Expenses [Line Items]

+ References

No definition available.

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- Definition

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

+ References

No definition available.

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- Definition

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://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482099/360-10-50-1

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481687/323-10-50-3

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