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GENERAL AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2023
Accounting Policies [Abstract] |
Property, Plant and Equipment [Table Text Block] | Property and equipment are recorded at cost and depreciated using the straight-line method over their estimated useful lives less an estimated salvage value, which are as follows:
| Estimated Useful Life | Estimated Salvage Value
Aircraft and other flight equipment: |  |
B737 and E175 aircraft | 20 to 25 years | 10%
Buildings | 25 to 40 years | 10%
Minor building and land improvements | 10 years | —%
Capitalized leases and leasehold improvements | Generally shorter of lease term or estimated useful life | —%
Computer hardware and software | 3 to 10 years | —%
Other furniture and equipment | 5 to 10 years | —%

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 360 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482099/360-10-50-1 + Details
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