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Commitments and Contingencies Crude Oil Releases (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended		3 Months Ended		3 Months Ended	6 Months Ended
	Jun. 30, 2014 Magnolia Station Crude Oil Release [Member]	Jun. 30, 2013 Magnolia Station Crude Oil Release [Member]	Dec. 31, 2013 Macedonia Crude Oil Release [Member]	Jun. 30, 2014 Macedonia Crude Oil Release [Member]	Jun. 30, 2014 Haynesville Crude Oil Release [Member]	Jun. 30, 2014 Haynesville Crude Oil Release [Member]
Loss Contingencies [Line Items]
Cost incurred for environmental remediation		$ 0.3	$ 0.3		$ 1.0	$ 1.0
Accrual for expected fines and penalties				1.5	2.5	2.5
Maximum Exposure for Environmental Remediation under Omnibus Agreement	$ 0.3					$ 1.0

X

- Definition

Cost incurred during the period to clean up and remediate site.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	duration

X

- Definition

Amount accrued for expected penalties or fines assessed in connection with an environmental mater.

+ References

No definition available.

+ Details

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Namespace Prefix:	dkl_
Data Type:	xbrli:monetaryItemType
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X

- Definition

Maximum Exposure for Environmental Remediation under Omnibus Agreement

+ References

No definition available.

+ Details

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Namespace Prefix:	dkl_
Data Type:	xbrli:monetaryItemType
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- Details

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