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Supplemental Financial Information - Other Assets (Details) - USD ($) $ in Millions | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Other Assets [Abstract] |  |  |
Asset derivative contracts, net |  | $ 77 | $ 120
Intangible assets |  | 423 | 426
Capital lease receivable |  | 86 | 90
Non-current prepaid maintenance |  | 132 | 6
Other |  | 131 | 132
Other assets |  | 849 | 774
Accrued Liabilities | Fuel derivatives |  |  |
Other Assets [Abstract] |  |  |
Asset derivative contracts, net | [1] | 0 | 0
Other Assets | Fuel derivatives |  |  |
Other Assets [Abstract] |  |  |
Asset derivative contracts, net | [1] | $ 77 | $ 120
[1] | The net amounts of derivative assets and liabilities are reconciled to the individual line item amounts presented in the unaudited Condensed Consolidated Balance Sheet in Note 5.

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