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Supplemental Financial Information (Tables) | 12 Months Ended
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Dec. 31, 2018
Table Text Block [Abstract] |
Other Assets |
(in millions) |  | December 31, 2018 |  | December 31, 2017
Derivative contracts |  | $ | 95 |  |  | $ | 136 |
Intangible assets, net |  | 400 |  |  | 413 |
Capital lease receivable |  | 61 |  |  | 76 |
Other |  | 164 |  |  | 161 |
Other assets |  | $ | 720 |  |  | $ | 786 |
Accounts Payable |
(in millions) |  | December 31, 2018 |  | December 31, 2017
Accounts payable trade |  | $ | 263 |  |  | $ | 186 |
Salaries payable |  | 216 |  |  | 201 |
Taxes payable |  | 220 |  |  | 203 |
Aircraft maintenance payable |  | 69 |  |  | 38 |
Fuel payable |  | 122 |  |  | 123 |
Other payable |  | 526 |  |  | 569 |
Accounts payable |  | $ | 1,416 |  |  | $ | 1,320 |
Accrued Liabilities |
(in millions) |  | December 31, 2018 |  | December 31, 2017
Profitsharing and savings plans |  | $ | 580 |  |  | $ | 579 |
Aircraft and other lease related obligations |  | 37 |  |  | 40 |
Permanently grounded aircraft liability |  | — |  |  | 34 |
Vacation pay |  | 403 |  |  | 365 |
Health |  | 107 |  |  | 100 |
Workers compensation |  | 166 |  |  | 172 |
Property and income taxes |  | 68 |  |  | 57 |
Other |  | 388 |  |  | 353 |
Accrued liabilities |  | $ | 1,749 |  |  | $ | 1,700 |
Other Noncurrent Liabilities |
(in millions) |  | December 31, 2018 |  | December 31, 2017
Postretirement obligation |  | $ | 232 |  |  | $ | 275 |
Non-current lease-related obligations |  | 48 |  |  | 85 |
Permanently grounded aircraft liability |  | — |  |  | 13 |
Other deferred compensation |  | 247 |  |  | 237 |
Derivative contracts |  | 12 |  |  | 21 |
Other |  | 111 |  |  | 76 |
Other noncurrent liabilities |  | $ | 650 |  |  | $ | 707 |

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