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Equity Units Rollforward (Details)	1 Months Ended	12 Months Ended
	Nov. 30, 2012	Dec. 31, 2014	Dec. 31, 2013
Increase (Decrease) in Partners' Capital [Roll Forward]
Units issued in initial public offering in November 2012	24,488,282us-gaap_PartnersCapitalAccountUnitsSoldInPublicOffering
Balance		24,644,649us-gaap_PartnersCapitalAccountUnits	24,488,282us-gaap_PartnersCapitalAccountUnits
GP units issued to maintain 2% interest		1,304dkl_GeneralPartnerunitsissuedtomaintain2interest	3,127dkl_GeneralPartnerunitsissuedtomaintain2interest
Unit-based compensation awards		63,949us-gaap_PartnersCapitalAccountUnitsUnitbasedCompensation	153,240us-gaap_PartnersCapitalAccountUnitsUnitbasedCompensation	[1]
Balance		24,709,902us-gaap_PartnersCapitalAccountUnits	24,644,649us-gaap_PartnersCapitalAccountUnits
Footnote [Abstract]
Units withheld for taxes		5,539dkl_UnitsPaidForTaxWithholdingForUnitBasedCompensation
Common - Public
Increase (Decrease) in Partners' Capital [Roll Forward]
Units issued in initial public offering in November 2012	9,200,000us-gaap_PartnersCapitalAccountUnitsSoldInPublicOffering / us-gaap_CapitalUnitsByClassAxis = dkl_CommonPublicMember
Balance		9,353,240us-gaap_PartnersCapitalAccountUnits / us-gaap_CapitalUnitsByClassAxis = dkl_CommonPublicMember	9,200,000us-gaap_PartnersCapitalAccountUnits / us-gaap_CapitalUnitsByClassAxis = dkl_CommonPublicMember
GP units issued to maintain 2% interest		0dkl_GeneralPartnerunitsissuedtomaintain2interest / us-gaap_CapitalUnitsByClassAxis = dkl_CommonPublicMember	0dkl_GeneralPartnerunitsissuedtomaintain2interest / us-gaap_CapitalUnitsByClassAxis = dkl_CommonPublicMember
Unit-based compensation awards		63,949us-gaap_PartnersCapitalAccountUnitsUnitbasedCompensation / us-gaap_CapitalUnitsByClassAxis = dkl_CommonPublicMember	153,240us-gaap_PartnersCapitalAccountUnitsUnitbasedCompensation / us-gaap_CapitalUnitsByClassAxis = dkl_CommonPublicMember	[1]
Balance		9,417,189us-gaap_PartnersCapitalAccountUnits / us-gaap_CapitalUnitsByClassAxis = dkl_CommonPublicMember	9,353,240us-gaap_PartnersCapitalAccountUnits / us-gaap_CapitalUnitsByClassAxis = dkl_CommonPublicMember
Common - Delek
Increase (Decrease) in Partners' Capital [Roll Forward]
Units issued in initial public offering in November 2012	2,799,258us-gaap_PartnersCapitalAccountUnitsSoldInPublicOffering / us-gaap_CapitalUnitsByClassAxis = dkl_CommonDelekMember
Balance		2,799,258us-gaap_PartnersCapitalAccountUnits / us-gaap_CapitalUnitsByClassAxis = dkl_CommonDelekMember	2,799,258us-gaap_PartnersCapitalAccountUnits / us-gaap_CapitalUnitsByClassAxis = dkl_CommonDelekMember
GP units issued to maintain 2% interest		0dkl_GeneralPartnerunitsissuedtomaintain2interest / us-gaap_CapitalUnitsByClassAxis = dkl_CommonDelekMember	0dkl_GeneralPartnerunitsissuedtomaintain2interest / us-gaap_CapitalUnitsByClassAxis = dkl_CommonDelekMember
Unit-based compensation awards		0us-gaap_PartnersCapitalAccountUnitsUnitbasedCompensation / us-gaap_CapitalUnitsByClassAxis = dkl_CommonDelekMember	0us-gaap_PartnersCapitalAccountUnitsUnitbasedCompensation / us-gaap_CapitalUnitsByClassAxis = dkl_CommonDelekMember	[1]
Balance		2,799,258us-gaap_PartnersCapitalAccountUnits / us-gaap_CapitalUnitsByClassAxis = dkl_CommonDelekMember	2,799,258us-gaap_PartnersCapitalAccountUnits / us-gaap_CapitalUnitsByClassAxis = dkl_CommonDelekMember
Subordinated
Increase (Decrease) in Partners' Capital [Roll Forward]
Units issued in initial public offering in November 2012	11,999,258us-gaap_PartnersCapitalAccountUnitsSoldInPublicOffering / us-gaap_CapitalUnitsByClassAxis = dkl_LimitedPartnerSubordinatedUnitsMember
Balance		11,999,258us-gaap_PartnersCapitalAccountUnits / us-gaap_CapitalUnitsByClassAxis = dkl_LimitedPartnerSubordinatedUnitsMember	11,999,258us-gaap_PartnersCapitalAccountUnits / us-gaap_CapitalUnitsByClassAxis = dkl_LimitedPartnerSubordinatedUnitsMember
GP units issued to maintain 2% interest		0dkl_GeneralPartnerunitsissuedtomaintain2interest / us-gaap_CapitalUnitsByClassAxis = dkl_LimitedPartnerSubordinatedUnitsMember	0dkl_GeneralPartnerunitsissuedtomaintain2interest / us-gaap_CapitalUnitsByClassAxis = dkl_LimitedPartnerSubordinatedUnitsMember
Unit-based compensation awards		0us-gaap_PartnersCapitalAccountUnitsUnitbasedCompensation / us-gaap_CapitalUnitsByClassAxis = dkl_LimitedPartnerSubordinatedUnitsMember	0us-gaap_PartnersCapitalAccountUnitsUnitbasedCompensation / us-gaap_CapitalUnitsByClassAxis = dkl_LimitedPartnerSubordinatedUnitsMember	[1]
Balance		11,999,258us-gaap_PartnersCapitalAccountUnits / us-gaap_CapitalUnitsByClassAxis = dkl_LimitedPartnerSubordinatedUnitsMember	11,999,258us-gaap_PartnersCapitalAccountUnits / us-gaap_CapitalUnitsByClassAxis = dkl_LimitedPartnerSubordinatedUnitsMember
General Partner
Increase (Decrease) in Partners' Capital [Roll Forward]
Units issued in initial public offering in November 2012	489,766us-gaap_PartnersCapitalAccountUnitsSoldInPublicOffering / us-gaap_CapitalUnitsByClassAxis = us-gaap_GeneralPartnerMember
Balance		492,893us-gaap_PartnersCapitalAccountUnits / us-gaap_CapitalUnitsByClassAxis = us-gaap_GeneralPartnerMember	489,766us-gaap_PartnersCapitalAccountUnits / us-gaap_CapitalUnitsByClassAxis = us-gaap_GeneralPartnerMember
GP units issued to maintain 2% interest		1,304dkl_GeneralPartnerunitsissuedtomaintain2interest / us-gaap_CapitalUnitsByClassAxis = us-gaap_GeneralPartnerMember	3,127dkl_GeneralPartnerunitsissuedtomaintain2interest / us-gaap_CapitalUnitsByClassAxis = us-gaap_GeneralPartnerMember
Unit-based compensation awards		0us-gaap_PartnersCapitalAccountUnitsUnitbasedCompensation / us-gaap_CapitalUnitsByClassAxis = us-gaap_GeneralPartnerMember	0us-gaap_PartnersCapitalAccountUnitsUnitbasedCompensation / us-gaap_CapitalUnitsByClassAxis = us-gaap_GeneralPartnerMember	[1]
Balance		494,197us-gaap_PartnersCapitalAccountUnits / us-gaap_CapitalUnitsByClassAxis = us-gaap_GeneralPartnerMember	492,893us-gaap_PartnersCapitalAccountUnits / us-gaap_CapitalUnitsByClassAxis = us-gaap_GeneralPartnerMember
[1] Unit-based compensation awards are presented net of 5,539 units withheld for taxes.

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The number of each class of partnership units outstanding at the balance sheet date. Units represent shares of ownership of the general, limited, and preferred partners.

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

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-SubTopic 210

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