XML 100 R76.htm IDEA: XBRL DOCUMENT v3.8.0.1

Equity Percentage Allocations of Available Cash from Operating Surplus (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Incentive Distribution Made to Member or Limited Partner [Line Items]
General partner's ownership interest	2.00%	2.00%	2.00%
Minimum Quarterly Distribution
Incentive Distribution Made to Member or Limited Partner [Line Items]
Distribution payment targets	$ 0.37500
Minimum Quarterly Distribution | Limited Partner
Incentive Distribution Made to Member or Limited Partner [Line Items]
Marginal percentage interest in distributions	98.00%
Minimum Quarterly Distribution | General Partner
Incentive Distribution Made to Member or Limited Partner [Line Items]
Marginal percentage interest in distributions	2.00%
First Target Distribution | Limited Partner
Incentive Distribution Made to Member or Limited Partner [Line Items]
Marginal percentage interest in distributions	98.00%
First Target Distribution | General Partner
Incentive Distribution Made to Member or Limited Partner [Line Items]
Marginal percentage interest in distributions	2.00%
First Target Distribution | Minimum
Incentive Distribution Made to Member or Limited Partner [Line Items]
Distribution payment targets	$ 0.37500
First Target Distribution | Maximum
Incentive Distribution Made to Member or Limited Partner [Line Items]
Distribution payment targets	$ 0.43125
Second Target Distribution | Limited Partner
Incentive Distribution Made to Member or Limited Partner [Line Items]
Marginal percentage interest in distributions	85.00%
Second Target Distribution | General Partner
Incentive Distribution Made to Member or Limited Partner [Line Items]
Marginal percentage interest in distributions	15.00%
Second Target Distribution | Minimum
Incentive Distribution Made to Member or Limited Partner [Line Items]
Distribution payment targets	$ 0.43125
Second Target Distribution | Maximum
Incentive Distribution Made to Member or Limited Partner [Line Items]
Distribution payment targets	$ 0.46875
Third Target Distribution | Limited Partner
Incentive Distribution Made to Member or Limited Partner [Line Items]
Marginal percentage interest in distributions	75.00%
Third Target Distribution | General Partner
Incentive Distribution Made to Member or Limited Partner [Line Items]
Marginal percentage interest in distributions	25.00%
Third Target Distribution | Minimum
Incentive Distribution Made to Member or Limited Partner [Line Items]
Distribution payment targets	$ 0.46875
Third Target Distribution | Maximum
Incentive Distribution Made to Member or Limited Partner [Line Items]
Distribution payment targets	0.56250
Thereafter
Incentive Distribution Made to Member or Limited Partner [Line Items]
Distribution payment targets	$ 0.56250
Thereafter | Limited Partner
Incentive Distribution Made to Member or Limited Partner [Line Items]
Marginal percentage interest in distributions	50.00%
Thereafter | General Partner
Incentive Distribution Made to Member or Limited Partner [Line Items]
Marginal percentage interest in distributions	50.00%

X

- Definition

Total quarterly distribution payment target amount

+ References

No definition available.

+ Details

Name:	dk_DistributionPaymentTargets
Namespace Prefix:	dk_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage split between the limited partners' and general partner's interests in distributions.

+ References

No definition available.

+ Details

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

X

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

X

- Definition

Percentage investment held by the managing member or general partner 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 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

+ Details

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

X

- Details

Name:	dk_IncentiveDistributionByTargetAxis=dk_MinimumQuarterlyDistributionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_IncentiveDistributionMadeToManagingMemberOrGeneralPartnerAxis=us-gaap_GeneralPartnerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dk_IncentiveDistributionByTargetAxis=dk_FirstTargetDistributionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dk_IncentiveDistributionByTargetAxis=dk_SecondTargetDistributionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dk_IncentiveDistributionByTargetAxis=dk_ThirdTargetDistributionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dk_IncentiveDistributionByTargetAxis=dk_ThereafterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: