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Supplemental Financial Information - Accounts Payable (Details) - USD ($) $ in Millions | Jun. 30, 2020 | Dec. 31, 2019
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Supplemental Financial Information - Accounts Payable [Abstract] |  |
Accounts payable trade | $ 139 | $ 304
Salaries payable | 207 | 231
Taxes payable | 38 | 227
Aircraft maintenance payable | 129 | 162
Fuel payable | 68 | 129
Dividends Payable | 0 | 93
Other payable | 389 | 428
Accounts Payable, Current | $ 970 | $ 1,574

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