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    <link:label id="lab_us-gaap_FinancingInterestExpense_88B4F4E64BB306A79675D5A38A84FFD2_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingInterestExpense_88B4F4E64BB306A79675D5A38A84FFD2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Inventory financing expense</link:label>
    <link:label id="lab_us-gaap_FinancingInterestExpense_88B4F4E64BB306A79675D5A38A84FFD2_label_en-US" xlink:label="lab_us-gaap_FinancingInterestExpense_88B4F4E64BB306A79675D5A38A84FFD2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Interest Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FinancingInterestExpense" xlink:label="loc_us-gaap_FinancingInterestExpense_88B4F4E64BB306A79675D5A38A84FFD2" xlink:type="locator" />
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    <link:label id="lab_dk_AmountOfConsignedInventory_F1C5D85DE19665453E30D5A38A8418F1_terseLabel_en-US" xlink:label="lab_dk_AmountOfConsignedInventory_F1C5D85DE19665453E30D5A38A8418F1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Barrels of Inventory Consigned to J Aron</link:label>
    <link:label id="lab_dk_AmountOfConsignedInventory_F1C5D85DE19665453E30D5A38A8418F1_label_en-US" xlink:label="lab_dk_AmountOfConsignedInventory_F1C5D85DE19665453E30D5A38A8418F1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amount of Consigned Inventory</link:label>
    <link:label id="lab_dk_AmountOfConsignedInventory_F1C5D85DE19665453E30D5A38A8418F1_documentation_en-US" xlink:label="lab_dk_AmountOfConsignedInventory_F1C5D85DE19665453E30D5A38A8418F1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of Consigned Inventory</link:label>
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    <link:label id="lab_dk_LiabilityForConsignedInventory_B4BE7EE8087FE328196FD5A38A841689_terseLabel_en-US" xlink:label="lab_dk_LiabilityForConsignedInventory_B4BE7EE8087FE328196FD5A38A841689" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">J Aron Liability for Consigned Inventory</link:label>
    <link:label id="lab_dk_LiabilityForConsignedInventory_B4BE7EE8087FE328196FD5A38A841689_label_en-US" xlink:label="lab_dk_LiabilityForConsignedInventory_B4BE7EE8087FE328196FD5A38A841689" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability for Consigned Inventory</link:label>
    <link:label id="lab_dk_LiabilityForConsignedInventory_B4BE7EE8087FE328196FD5A38A841689_documentation_en-US" xlink:label="lab_dk_LiabilityForConsignedInventory_B4BE7EE8087FE328196FD5A38A841689" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Liability for Consigned Inventory</link:label>
    <link:loc xlink:href="dk-20170331.xsd#dk_LiabilityForConsignedInventory" xlink:label="loc_dk_LiabilityForConsignedInventory_B4BE7EE8087FE328196FD5A38A841689" xlink:type="locator" />
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    <link:loc xlink:href="dk-20170331.xsd#dk_ShareholdersEquityAbstract" xlink:label="loc_dk_ShareholdersEquityAbstract_2B6DB5C279FF498FD92620B504D5904E" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ScheduleOfStockholdersEquityTableTextBlock_DF2ECB1D0411937AA67320B504D6F0F5_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfStockholdersEquityTableTextBlock_DF2ECB1D0411937AA67320B504D6F0F5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Stockholders Equity [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfStockholdersEquityTableTextBlock_DF2ECB1D0411937AA67320B504D6F0F5_label_en-US" xlink:label="lab_us-gaap_ScheduleOfStockholdersEquityTableTextBlock_DF2ECB1D0411937AA67320B504D6F0F5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Stockholders Equity [Table Text Block]</link:label>
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    <link:label id="lab_dk_CondensedConsolidatedStatementsOfComprehensiveIncomeAbstract_5B0167407CE32CC207B9CA530D3E55A5_label_en-US" xlink:label="lab_dk_CondensedConsolidatedStatementsOfComprehensiveIncomeAbstract_5B0167407CE32CC207B9CA530D3E55A5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Condensed Consolidated Statements of Comprehensive Income [Abstract]</link:label>
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    <link:loc xlink:href="dk-20170331.xsd#dk_CondensedConsolidatedStatementsOfComprehensiveIncomeAbstract" xlink:label="loc_dk_CondensedConsolidatedStatementsOfComprehensiveIncomeAbstract_5B0167407CE32CC207B9CA530D3E55A5" xlink:type="locator" />
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    <link:label id="lab_us-gaap_NetIncomeLoss_C8AA2B1D8C14FC41CAEBCA530D3E23B0_terseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLoss_C8AA2B1D8C14FC41CAEBCA530D3E23B0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net income (loss) attributable to Delek</link:label>
    <link:label id="lab_us-gaap_NetIncomeLoss_C8AA2B1D8C14FC41CAEBCA530D3E23B0_label_en-US" xlink:label="lab_us-gaap_NetIncomeLoss_C8AA2B1D8C14FC41CAEBCA530D3E23B0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income (Loss) Attributable to Parent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_C8AA2B1D8C14FC41CAEBCA530D3E23B0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLoss_C8AA2B1D8C14FC41CAEBCA530D3E23B0" xlink:to="lab_us-gaap_NetIncomeLoss_C8AA2B1D8C14FC41CAEBCA530D3E23B0" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_62397B0877042C23204DCA530D3EFB99_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_62397B0877042C23204DCA530D3EFB99" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other comprehensive income (loss):</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_62397B0877042C23204DCA530D3EFB99_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_62397B0877042C23204DCA530D3EFB99" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Net of Tax [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_62397B0877042C23204DCA530D3EFB99" xlink:type="locator" />
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    <link:label id="lab_dk_CommoditycontractsdesignatedascashflowhedgesAbstract_72C754CC2DCD6CCE9886CA530D3E63F0_terseLabel_en-US" xlink:label="lab_dk_CommoditycontractsdesignatedascashflowhedgesAbstract_72C754CC2DCD6CCE9886CA530D3E63F0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commodity contracts designated as cash flow hedges:</link:label>
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    <link:label id="lab_dk_CommoditycontractsdesignatedascashflowhedgesAbstract_72C754CC2DCD6CCE9886CA530D3E63F0_documentation_en-US" xlink:label="lab_dk_CommoditycontractsdesignatedascashflowhedgesAbstract_72C754CC2DCD6CCE9886CA530D3E63F0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Commodity contracts designated as cash flow hedges [Abstract]</link:label>
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    <link:label id="lab_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_194C68F59B1D38F6B990CA530D3E9E14_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_194C68F59B1D38F6B990CA530D3E9E14" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unrealized losses, net of ineffectiveness (gains) losses of $(2.2) million and $1.0 million for the three months ended March 31, 2017 and 2016, respectively</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_194C68F59B1D38F6B990CA530D3E9E14_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_194C68F59B1D38F6B990CA530D3E9E14" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_194C68F59B1D38F6B990CA530D3E9E14" xlink:type="locator" />
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    <link:label id="lab_dk_ErgonNoteMember_4DA0A35DF45A5E9DBE25E8DD99E28FFC_documentation_en-US" xlink:label="lab_dk_ErgonNoteMember_4DA0A35DF45A5E9DBE25E8DD99E28FFC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ergon Note [Member]</link:label>
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    <link:loc xlink:href="dk-20170331.xsd#dk_WellsRevolvingLoanMember" xlink:label="loc_dk_WellsRevolvingLoanMember_A1DECE1D10D987F121BBCA94DEFB8075" xlink:type="locator" />
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    <link:loc xlink:href="dk-20170331.xsd#dk_PromissoryNotesMember" xlink:label="loc_dk_PromissoryNotesMember_4D0DAD0A8557E933E0C4CA94DEFB005B" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_0B40C08D712684BEF9E1D514CB61C80F_label_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_0B40C08D712684BEF9E1D514CB61C80F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Income Tax Expense (Benefit)</link:label>
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    <link:label id="lab_us-gaap_IncomeLossFromEquityMethodInvestments_89BA35DE72401C715233D514CB61C014_negatedLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromEquityMethodInvestments_89BA35DE72401C715233D514CB61C014" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">(Income) loss from equity method investments</link:label>
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    <link:label id="lab_us-gaap_EquityMethodInvestmentDividendsOrDistributions_E950F1BCE3A380581866D514CB611622_terseLabel_en-US" xlink:label="lab_us-gaap_EquityMethodInvestmentDividendsOrDistributions_E950F1BCE3A380581866D514CB611622" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividends from equity method investments</link:label>
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    <link:label id="lab_us-gaap_ShareBasedCompensation_A74800456F4A1D78C9A3D514CB614528_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation_A74800456F4A1D78C9A3D514CB614528" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Equity-based compensation expense</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations" xlink:label="loc_us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations_E917F939D3BD17843AA0D514CB6246B9" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_676FD9E532FE272E9FAAD514CB62E209" xlink:type="locator" />
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_433E264969A5AAE4156FD514CB64EBE8_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_433E264969A5AAE4156FD514CB64EBE8" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash (used in) provided by financing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_433E264969A5AAE4156FD514CB64EBE8_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_433E264969A5AAE4156FD514CB64EBE8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_433E264969A5AAE4156FD514CB64EBE8" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_DCA97B5152412DFE74EBD514CB642515_totalLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_DCA97B5152412DFE74EBD514CB642515" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net (decrease) increase in cash and cash equivalents</link:label>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_DCA97B5152412DFE74EBD514CB642515_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_DCA97B5152412DFE74EBD514CB642515" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents, Period Increase (Decrease)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_DCA97B5152412DFE74EBD514CB642515" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations_BBBD9F8C6BC33F78F55FD514CB64576F_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations_BBBD9F8C6BC33F78F55FD514CB64576F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents, at Carrying Value, Including Discontinued Operations</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations_BBBD9F8C6BC33F78F55FD514CB64576F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations_BBBD9F8C6BC33F78F55FD514CB64576F" xlink:to="lab_us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations_BBBD9F8C6BC33F78F55FD514CB64576F" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations_14A0B68E64303977AFFFD514CB649999_periodEndLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations_14A0B68E64303977AFFFD514CB649999" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents at the end of the period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations_14A0B68E64303977AFFFD514CB649999" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations_14A0B68E64303977AFFFD514CB649999" xlink:to="lab_us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations_14A0B68E64303977AFFFD514CB649999" xlink:type="arc" />
    <link:label id="lab_us-gaap_DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents_8F6D056473487D06FC15D514CB64E0CE_terseLabel_en-US" xlink:label="lab_us-gaap_DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents_8F6D056473487D06FC15D514CB64E0CE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Less cash and cash equivalents of discontinued operations at the end of the period</link:label>
    <link:label id="lab_us-gaap_DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents_8F6D056473487D06FC15D514CB64E0CE_label_en-US" xlink:label="lab_us-gaap_DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents_8F6D056473487D06FC15D514CB64E0CE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents_8F6D056473487D06FC15D514CB64E0CE" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_FB1E653A743996BA2DD5D514CB64EA63_periodEndLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_FB1E653A743996BA2DD5D514CB64EA63" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents of continuing operations at the end of the period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_FB1E653A743996BA2DD5D514CB64EA63" xlink:type="locator" />
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    <link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_D3986ADA79BFC681B1E8D514CB64565A_verboseLabel_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract_D3986ADA79BFC681B1E8D514CB64565A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Supplemental disclosures of cash flow information:</link:label>
    <link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_D3986ADA79BFC681B1E8D514CB64565A_label_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract_D3986ADA79BFC681B1E8D514CB64565A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplemental Cash Flow Information [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract_D3986ADA79BFC681B1E8D514CB64565A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_D3986ADA79BFC681B1E8D514CB64565A" xlink:to="lab_us-gaap_SupplementalCashFlowInformationAbstract_D3986ADA79BFC681B1E8D514CB64565A" xlink:type="arc" />
    <link:label id="lab_dk_SupplementalCashFlowInformationCashPaidDuringPeriodAbstract_AEEF16D2B438EED9D814D514CB643293_verboseLabel_en-US" xlink:label="lab_dk_SupplementalCashFlowInformationCashPaidDuringPeriodAbstract_AEEF16D2B438EED9D814D514CB643293" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Cash paid during the period for:</link:label>
    <link:label id="lab_dk_SupplementalCashFlowInformationCashPaidDuringPeriodAbstract_AEEF16D2B438EED9D814D514CB643293_label_en-US" xlink:label="lab_dk_SupplementalCashFlowInformationCashPaidDuringPeriodAbstract_AEEF16D2B438EED9D814D514CB643293" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplemental Cash Flow Information Cash Paid During Period Abstract</link:label>
    <link:label id="lab_dk_SupplementalCashFlowInformationCashPaidDuringPeriodAbstract_AEEF16D2B438EED9D814D514CB643293_documentation_en-US" xlink:label="lab_dk_SupplementalCashFlowInformationCashPaidDuringPeriodAbstract_AEEF16D2B438EED9D814D514CB643293" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cash paid during the period for:</link:label>
    <link:loc xlink:href="dk-20170331.xsd#dk_SupplementalCashFlowInformationCashPaidDuringPeriodAbstract" xlink:label="loc_dk_SupplementalCashFlowInformationCashPaidDuringPeriodAbstract_AEEF16D2B438EED9D814D514CB643293" xlink:type="locator" />
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    <link:label id="lab_us-gaap_InterestPaidNet_43B456992D3E624CEEBFD514CB65832E_verboseLabel_en-US" xlink:label="lab_us-gaap_InterestPaidNet_43B456992D3E624CEEBFD514CB65832E" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Interest, net of capitalized interest of a nominal amount and $0.1 million in the 2017 and 2016 periods, respectively</link:label>
    <link:label id="lab_us-gaap_InterestPaidNet_43B456992D3E624CEEBFD514CB65832E_label_en-US" xlink:label="lab_us-gaap_InterestPaidNet_43B456992D3E624CEEBFD514CB65832E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Paid, Net</link:label>
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    <link:label id="lab_us-gaap_IncomeTaxesPaid_40665D7D73F9E3FDA77FD514CB65F386_verboseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaid_40665D7D73F9E3FDA77FD514CB65F386" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Income taxes</link:label>
    <link:label id="lab_us-gaap_IncomeTaxesPaid_40665D7D73F9E3FDA77FD514CB65F386_label_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaid_40665D7D73F9E3FDA77FD514CB65F386" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Taxes Paid</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxesPaid" xlink:label="loc_us-gaap_IncomeTaxesPaid_40665D7D73F9E3FDA77FD514CB65F386" xlink:type="locator" />
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    <link:label id="lab_dk_CashFlowNoncashInvestingActivitiesDisclosureAbstract_D80D9AE8AD212BA1F6AED514CB657785_terseLabel_en-US" xlink:label="lab_dk_CashFlowNoncashInvestingActivitiesDisclosureAbstract_D80D9AE8AD212BA1F6AED514CB657785" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-cash investing activities:</link:label>
    <link:label id="lab_dk_CashFlowNoncashInvestingActivitiesDisclosureAbstract_D80D9AE8AD212BA1F6AED514CB657785_label_en-US" xlink:label="lab_dk_CashFlowNoncashInvestingActivitiesDisclosureAbstract_D80D9AE8AD212BA1F6AED514CB657785" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Flow, Noncash Investing Activities Disclosure [Abstract]</link:label>
    <link:label id="lab_dk_CashFlowNoncashInvestingActivitiesDisclosureAbstract_D80D9AE8AD212BA1F6AED514CB657785_documentation_en-US" xlink:label="lab_dk_CashFlowNoncashInvestingActivitiesDisclosureAbstract_D80D9AE8AD212BA1F6AED514CB657785" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cash Flow, Noncash Investing Activities Disclosure [Abstract]</link:label>
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    <link:label id="lab_dk_Increasedecreaseinaccruedcapitalexpenditures_4A6D04A536D78B64D9EFD514CB651282_terseLabel_en-US" xlink:label="lab_dk_Increasedecreaseinaccruedcapitalexpenditures_4A6D04A536D78B64D9EFD514CB651282" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Decrease in accrued capital expenditures</link:label>
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    <link:label id="lab_dk_Increasedecreaseinaccruedcapitalexpenditures_4A6D04A536D78B64D9EFD514CB651282_documentation_en-US" xlink:label="lab_dk_Increasedecreaseinaccruedcapitalexpenditures_4A6D04A536D78B64D9EFD514CB651282" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Increase (decrease) in accrued capital expenditures</link:label>
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