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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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Total costs accrued as of the balance sheet date for environmental loss contingencies.

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