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Other Financial Information (Tables) | 12 Months Ended
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Dec. 31, 2015
Other Financial Information [Abstract] |
Schedule of Other Operating Revenues | Other operating revenues in the Consolidated and Combined Income Statements includes the following items:
(Thousands of dollars) | 2015 |  | 2014 |  | 2013
Renewable Identification Numbers (RINs) sales | $ | 117,513 |  |  | $ | 92,916 |  |  | $ | 91,391 |
Other | 3,321 |  |  | 3,193 |  |  | 2,907 |
Total other operating revenue | $ | 120,834 |  |  | $ | 96,109 |  |  | $ | 94,298 |
Summary of Changes in Operating Working Capital |
(Thousands of dollars) | 2015 |  | 2014 |  | 2013
Accounts receivable | $ | 2,857 |  |  | $ | 59,519 |  |  | $ | 325,063 |
Inventories | 1,121 |  |  | 750 |  |  | 4,011 |
Prepaid expenses and other current assets | (27,107 | ) |  | 477 |  |  | (7,755 | )
Accounts payable and accrued liabilities | 1,043 |  |  | (53,234 | ) |  | (271,379 | )
Income taxes payable | (25,599 | ) |  | (37,325 | ) |  | 6,892 |
Current deferred income tax liabilities | 1,099 |  |  | (6,662 | ) |  | (5,628 | )
Net decrease (increase) in noncash operating working capital | $ | (46,586 | ) |  | $ | (36,475 | ) |  | $ | 51,204 |

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- Definition Tabular disclosure of the net increase (decrease) in operating capital in the operating section of the statement of cash flows, represents the entire footnote disclosure that provides details regarding the net change during the reporting period of all assets and liabilities used in operating activities. + References No definition available. + Details
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