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Related Party Transactions Commercial Agreements (Details) (Delek [Member], El Dorado Assets [Member], USD $)
In Millions, unless otherwise specified
 0 Months Ended
Mar. 31, 2015
Related Party Transaction [Line Items]  
Minimum throughput fee $ 1.5dkl_Minimumthroughputfee
Light Crude Throughput [Member]
  
Related Party Transaction [Line Items]  
Fee (dollars per barrel) 1.00dkl_ThroughputCommitmentTariffRate
/ us-gaap_ProductOrServiceAxis
= dkl_LightCrudeOilMember
/ us-gaap_RelatedPartyTransactionAxis
= dkl_ElDoradoOffloadingRacksMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= dkl_DelekUsMember		 [1]
Light Crude Throughput [Member] | Minimum [Member]
  
Related Party Transaction [Line Items]  
Term Of Agreement (years) 9 years
Light Crude Throughput [Member] | Maximum [Member]
  
Related Party Transaction [Line Items]  
Term Of Agreement (years) 15 years [2]
Heavy Crude Throughput [Member]
  
Related Party Transaction [Line Items]  
Fee (dollars per barrel) 2.25dkl_ThroughputCommitmentTariffRate
/ us-gaap_ProductOrServiceAxis
= dkl_HeavyCrudeOilMember
/ us-gaap_RelatedPartyTransactionAxis
= dkl_ElDoradoOffloadingRacksMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= dkl_DelekUsMember		 [1]
Heavy Crude Throughput [Member] | Minimum [Member]
  
Related Party Transaction [Line Items]  
Term Of Agreement (years) 9 years
Heavy Crude Throughput [Member] | Maximum [Member]
  
Related Party Transaction [Line Items]  
Term Of Agreement (years) 15 years [2]
[1] Fees payable to the Partnership by Delek.
[2] Maximum term gives effect to the extension of the commercial agreement pursuant to the terms thereof.