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v3.19.1

Related Party Transactions - Commercial Agreements (Details) $ in Millions |  | 3 Months Ended
--- | --- | ---
Mar. 01, 2018 USD ($) | Mar. 31, 2019 $ / bbl
Big Spring Pipeline, Storage And Throughput Facilities Agreement | Crude Oil Throughput |  |
Related Party Transaction [Line Items] |  |
Term of agreement |  | 10 years
Big Spring Pipeline, Storage And Throughput Facilities Agreement | Maximum | Crude Oil Throughput |  |
Related Party Transaction [Line Items] |  |
Throughput commitment tariff rate |  | 0.66
Big Spring Pipeline, Storage And Throughput Facilities Agreement | Minimum | Crude Oil Throughput |  |
Related Party Transaction [Line Items] |  |
Throughput commitment tariff rate |  | 0.05
Big Spring Asphalt Services Agreement |  |
Related Party Transaction [Line Items] |  |
Term of agreement |  | 10 years
Big Spring Asphalt Services Agreement | Storage, Throughput Facilities |  |
Related Party Transaction [Line Items] |  |
Throughput commitment tariff rate |  | 8.30
Big Spring Marketing Agreement |  |
Related Party Transaction [Line Items] |  |
Term of agreement |  | 10 years
Big Spring Marketing Agreement | Maximum | Crude Oil Throughput |  |
Related Party Transaction [Line Items] |  |
Throughput commitment tariff rate |  | 0.71
Big Spring Marketing Agreement | Minimum | Crude Oil Throughput |  |
Related Party Transaction [Line Items] |  |
Throughput commitment tariff rate |  | 0.50
Omnibus Agreement | Delek US and affiliates |  |
Related Party Transaction [Line Items] |  |
Related party annual service fee | $ | $ 3.9 |

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- Definition Related Party Annual Service Fee + References No definition available. + Details
Name: | dk_RelatedPartyAnnualServiceFee
Namespace Prefix: | dk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The term of the agreement. Agreement could be a lease, debt, arrangement, services agreement or other arrangement. + References No definition available. + Details
Name: | dk_TermOfAgreement
Namespace Prefix: | dk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Throughput Commitment Tariff Rate + References No definition available. + Details
Name: | dk_ThroughputCommitmentTariffRate
Namespace Prefix: | dk_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_RelatedPartyTransactionAxis=dk_BigSpringPipelineStorageAndThroughputFacilitiesAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_ProductOrServiceAxis=dk_CrudeOilPipelineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RelatedPartyTransactionAxis=dk_BigSpringAsphaltServicesAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_ProductOrServiceAxis=dk_StorageThroughputFacilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RelatedPartyTransactionAxis=dk_BigSpringMarketingAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_TypeOfArrangementAxis=dk_OmnibusAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=srt_AffiliatedEntityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |