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Accounting Policies Inventory (Details) - Supplier Concentration Risk - Inventory purchased - Wholesale Marketing and Terminalling - vendor | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Concentration Risk [Line Items] |  |  |
Number of vendors |  | 2 |
Concentration risk, percentage | 64.20% | 11.60% | 72.00%
Delek |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage |  | 65.80% |

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