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Commitments and Contingencies Contracts and Agreements (Details) (Abilene Contract [Member], Inventories [Member])	3 Months Ended
	Mar. 31, 2015
Abilene Contract [Member] | Inventories [Member]
Other Commitments [Line Items]
Maximum Purchases under Supply Contract (bpd)	20,350dkl_MaximumPurchasesUnderSupplyContract / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = us-gaap_InventoriesMember / us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis = dkl_AbileneContractMember

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- Definition

Maximum Purchases under Supply Contract

+ References

No definition available.

+ Details

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Namespace Prefix:	dkl_
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Period Type:	duration

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- Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration