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Commitments and Contingencies - Crude Oil Releases (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Loss Contingencies [Line Items] |  |
Accrual for environmental loss contingencies, period increase (decrease) | $ 0.1 |
Magnolia Release | Other Current Liabilities [Member] | Magnolia Release |  |
Loss Contingencies [Line Items] |  |
Accrual for environmental loss contingencies | 2.2 |
Operating Expense [Member] |  |
Loss Contingencies [Line Items] |  |
Accrual for environmental loss contingencies | 1.1 |
Delek US | Omnibus Agreement | Delek US and affiliates |  |
Loss Contingencies [Line Items] |  |
Reimbursement for costs incurred for asset failures | 3.4 | $ 2.9
Delek US | Omnibus Agreement | Operating Expense [Member] | Delek US and affiliates |  |
Loss Contingencies [Line Items] |  |
Reimbursement for costs incurred for asset failures | $ 3.5 |

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