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v2.4.1.9

Related Party Transactions Operation and Management Services Agreement (Details) (General Partner, USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2014
Operation and Management Services Agreement [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Management Fee, Amount Paid | $ 5.9 us-gaap_PaymentForManagementFee / us-gaap_RelatedPartyTransactionAxis = dkl_OperationandManagementServicesAgreementMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_GeneralPartnerMember | $ 1.3 us-gaap_PaymentForManagementFee / us-gaap_RelatedPartyTransactionAxis = dkl_OperationandManagementServicesAgreementMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_GeneralPartnerMember |
Partnership Agreement [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Management Fee, Amount Paid | $ 6.5 us-gaap_PaymentForManagementFee / us-gaap_RelatedPartyTransactionAxis = dkl_PartnershipAgreementMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_GeneralPartnerMember |  | $ 12.3 us-gaap_PaymentForManagementFee / us-gaap_RelatedPartyTransactionAxis = dkl_PartnershipAgreementMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_GeneralPartnerMember

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- Definition Amount paid to managing member or general partner for management of the day-to-day business functions 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 850 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
Name: | us-gaap_PaymentForManagementFee
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration