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Regional Expenses (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Regional Expenses [Line Items] |  |
Depreciation and amortization | $ 470 | $ 486
Aircraft rent | 328 | 344
Regional expenses | 1,201 | 1,142
American Airlines, Inc. |  |
Regional Expenses [Line Items] |  |
Depreciation and amortization | 468 | 484
Aircraft rent | 328 | 344
Regional expenses | $ 1,197 | 1,143
Republic Airways Holdings, Inc. |  |
Regional Expenses [Line Items] |  |
Ownership percentage | 25.00% |
Republic Airways Holdings, Inc. | American Airlines, Inc. |  |
Regional Expenses [Line Items] |  |
Ownership percentage | 25.00% |
Regional operating special items, net |  |
Regional Expenses [Line Items] |  |
Depreciation and amortization | $ 79 | 80
Aircraft rent | 2 | 1
Regional operating special items, net | American Airlines, Inc. |  |
Regional Expenses [Line Items] |  |
Depreciation and amortization | 69 | 68
Aircraft rent | 2 | 1
Regional operating special items, net | Republic Airways Holdings Inc. |  |
Regional Expenses [Line Items] |  |
Regional expenses | 149 | 168
Regional operating special items, net | Republic Airways Holdings Inc. | American Airlines, Inc. |  |
Regional Expenses [Line Items] |  |
Regional expenses | $ 149 | $ 168

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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 + Details
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