Adjustment to Additional Paid-In Capital, Impact From IDR Simplification Transaction

No definition available.

Name:	dk_AdjustmentToAdditionalPaidInCapitalImpactFromIDRSimplificationTransaction
Namespace Prefix:	dk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Asset Acquisition, Consideration Transferred

+ References

No definition available.

+ Details

Name:	dk_AssetAcquisitionConsiderationTransferred
Namespace Prefix:	dk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Asset Acquisition, Equity Interest Transfered As Consideration, Shares

+ References

No definition available.

+ Details

Name:	dk_AssetAcquisitionEquityInterestTransferedAsConsiderationShares
Namespace Prefix:	dk_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Business Combination, Consideration Transferred Equity Interests Issued And Issuable, Shares

+ References

No definition available.

+ Details

Name:	dk_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableShares
Namespace Prefix:	dk_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Deferred Income Tax, IDR Transaction

+ References

No definition available.

+ Details

Name:	dk_DeferredIncomeTaxIDRTransaction
Namespace Prefix:	dk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Economic Partner Interest

+ References

No definition available.

+ Details

Name:	dk_EconomicPartnerInterest
Namespace Prefix:	dk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

IDR Simplification Transaction Cost

+ References

No definition available.

+ Details

Name:	dk_IDRSimplificationTransactionCost
Namespace Prefix:	dk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Limited Partner Interest, Shares

+ References

No definition available.

+ Details

Name:	dk_LimitedPartnerInterestShares
Namespace Prefix:	dk_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Ownership Interest in General Partner

+ References

No definition available.

+ Details

Name:	dk_OwnershipInterestinGeneralPartner
Namespace Prefix:	dk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

+ Details

Name:	us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6613-128477

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6578-128477

+ Details

Name:	us-gaap_BusinessCombinationConsiderationTransferred1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage investment held by members or limited partners of limited liability company (LLC) or limited partnership (LP).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

+ Details

Name:	us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of limited partner units outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 5
-Subparagraph (SAB Topic 4.F)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187171-122770

+ Details

Name:	us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_StockRepurchasedDuringPeriodShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_StockRepurchasedDuringPeriodValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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_VariableInterestEntityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_AdditionalPaidInCapitalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_NoncontrollingInterestMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=dk_DelekLogisticsGPLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=dk_DelekLogisticsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=dk_DelekLogisticsGPLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=dk_DelekLogisticsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dk_AssetAcquisitionAxis=dk_DelekTruckingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dk_AssetAcquisitionAxis=dk_BigSpringGatheringAssetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PartnerTypeOfPartnersCapitalAccountAxis=us-gaap_LimitedPartnerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Delek Logistics - Narrative (Details) - USD ($) $ in Millions				1 Months Ended	3 Months Ended	9 Months Ended
	Aug. 13, 2020	May 01, 2020	Mar. 31, 2020	Mar. 31, 2020	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Aug. 31, 2020
Variable Interest Entity [Line Items]
Impact from IDR Simplification transaction of Delek Logistics LP					$ (13.6)	$ (13.6)
Deferred Income Tax, IDR Transaction					(11.5)
Impact of IDR Simplification transaction of Delek Logistics LP					2.1	2.1	$ 0.0
Additional Paid-in Capital
Variable Interest Entity [Line Items]
Impact from IDR Simplification transaction of Delek Logistics LP					37.2	37.2
Non-Controlling Interest in Subsidiaries
Variable Interest Entity [Line Items]
Impact from IDR Simplification transaction of Delek Logistics LP					$ (50.8)	$ (50.8)
Delek Logistics GP, LLC
Variable Interest Entity [Line Items]
Business Combination, Consideration Transferred	$ 23.1
Business Acquisition, Percentage of Voting Interests Acquired	5.20%
Ownership Interest in Logistics GP (as percent)	100.00%
Delek Logistics
Variable Interest Entity [Line Items]
Business Combination, Consideration Transferred	$ 45.0
Business Combination, Consideration Transferred Equity Interests Issued And Issuable, Shares	14,000,000.0
Limited Partner Interest, Shares								14,000,000.0
Delek Logistics \| Delek Logistics GP, LLC
Variable Interest Entity [Line Items]
Economic partner interest (in percent)	2.00%
Variable Interest Entity, Primary Beneficiary \| Delek Logistics
Variable Interest Entity [Line Items]
Common units (in shares)					34,745,868	34,745,868
Variable Interest Entity, Primary Beneficiary \| Delek Logistics
Variable Interest Entity [Line Items]
Limited partner interest (as percent)						80.00%
Delek Trucking [Member]
Variable Interest Entity [Line Items]
Asset Acquisition, Consideration Transferred		$ 48.0
Big Spring Gathering Asset [Member]
Variable Interest Entity [Line Items]
Asset Acquisition, Consideration Transferred			$ 100.0
Asset Acquisition, Equity Interest Transfered As Consideration, Shares			5,000,000.0
Limited Partner [Member]
Variable Interest Entity [Line Items]
Stock Repurchased During Period, Shares				451,822
Stock Repurchased During Period, Value				$ 5.0