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Commitments and Contingencies - Crude Oil Releases (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Loss Contingencies [Line Items] |  |  |
Accrual for environmental loss contingencies, period increase (decrease) | $ 0.0 | $ 0.1 |
Accrual for Environmental Loss Contingencies, Charges to Expense for New Losses | 0.2 |  | $ 7.1
Operating Expense [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Accrual for environmental loss contingencies | 0.3 |  |
Delek US | Omnibus Agreement | Delek US and affiliates |  |  |
Loss Contingencies [Line Items] |  |  |
Reimbursement for costs incurred for asset failures |  | 3.4 |
Delek US | Omnibus Agreement | Operating Expense [Member] | Delek US and affiliates |  |  |
Loss Contingencies [Line Items] |  |  |
Reimbursement for costs incurred for asset failures | $ 0.0 | $ 3.5 |

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