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SUPPLEMENTAL FINANCIAL INFORMATION | 12 Months Ended
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Dec. 31, 2018
Disclosure Text Block [Abstract] |
SUPPLEMENTAL FINANCIAL INFORMATION | SUPPLEMENTAL FINANCIAL INFORMATION
(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 |
(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 |
(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 |
(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 |
For further information on fuel derivative and interest rate derivative contracts, see Note 10. Other Operating Expenses Other operating expenses consist of distribution costs, advertising expenses, personnel expenses, professional fees, and other operating costs, none of which individually exceed 10 percent of Operating expenses.

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