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Supplemental Financial Information - Accounts Payable (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Accounts payable trade | $ 330 | $ 265
Salaries, withholdings and payroll taxes | 479 | 400
Ticket taxes and fees | 426 | 302
Aircraft maintenance payable | 140 | 140
Fuel payable | 119 | 161
Dividends payable | 108 | 107
Accrued third party services | 181 | 269
Other payable | 245 | 218
Accounts payable | $ 2,028 | $ 1,862

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