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Commitments and Contingencies - Crude Oil Releases (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Oct. 03, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies, period increase (decrease)		$ 0.0	$ 0.2	$ 0.3	$ 0.3
Magnolia Release | Other Current Liabilities [Member] | Magnolia Release
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies		2.2		2.2		$ 2.2
Operating Expense [Member]
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies		0.4		0.4
Delek US | Omnibus Agreement | Delek US and affiliates
Loss Contingencies [Line Items]
Reimbursement for costs incurred for asset failures		0.5	1.0	4.6	8.0
Delek US | Omnibus Agreement | Operating Expense [Member] | Delek US and affiliates
Loss Contingencies [Line Items]
Reimbursement for costs incurred for asset failures		$ 0.3	$ 1.4	$ 6.0	$ 7.8
Subsequent Event | Minimum
Loss Contingencies [Line Items]
Maintenance and remediation costs	$ 4.0
Subsequent Event | Maximum
Loss Contingencies [Line Items]
Maintenance and remediation costs	$ 6.0

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

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