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Net Income Per Unit Narrative (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net Income Per Unit [Abstract]
General partner's ownership interest	2.00%	2.00%	2.00%	2.00%

X

- Definition

Net Income Per Unit [Abstract]

+ References

No definition available.

+ Details

Name:	dkl_NetIncomePerUnitAbstract
Namespace Prefix:	dkl_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 272



-SubTopic 10



-Section 50



-Paragraph 3



-Subparagraph (b)



-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
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