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Supplemental Financial Information - Accounts Payable (Details) - USD ($) $ in Millions | Jun. 30, 2018 | Dec. 31, 2017
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Supplemental Financial Information - Accounts Payable [Abstract] |  |
Accounts payable trade | $ 280 | $ 186
Salaries payable | 215 | 201
Taxes payable | 277 | 203
Aircraft maintenance payable | 54 | 38
Fuel payable | 95 | 123
Other payables | 417 | 569
Accounts Payable, Current | $ 1,338 | $ 1,320

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- Definition Carrying value as of the balance sheet date of obligations incurred and payable for fuel. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References No definition available. + Details
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