Delek US (DK) 10-Q 9 Nov 20 2020 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Document - shares	9 Months Ended
	Sep. 30, 2020	Oct. 30, 2020
DOCUMENT AND ENTITY INFORMATION [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
Entity File Number	001-38142
Entity Registrant Name	DELEK US HOLDINGS, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	35-2581557
Entity Address, Address Line One	7102 Commerce Way
Entity Address, City or Town	Brentwood
Entity Address, State or Province	TN
Entity Address, Postal Zip Code	37027
City Area Code	615
Local Phone Number	771-6701
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Title of 12(b) Security	Common Stock, par value $0.01
Trading Symbol	DK
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding		73,725,758
Entity Central Index Key	0001694426
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Amendment Flag	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 807.9	$ 955.3
Accounts receivable, net	518.7	792.6
Inventories, net of inventory valuation reserves	672	946.7
Other current assets	515.9	268.7
Total current assets	2,514.5	2,963.3
Property, plant and equipment:
Property, plant and equipment	3,515.7	3,362.8
Less: accumulated depreciation	(1,091.8)	(934.5)
Property, plant and equipment, net	2,423.9	2,428.3
Operating lease right-of-use assets	180.3	183.6
Goodwill	855.7	855.7
Other intangibles, net	109	110.3
Equity method investments	373.1	407.3
Other non-current assets	68.5	67.8
Total assets	6,525	7,016.3
Current liabilities:
Accounts payable	973.1	1,599.7
Current portion of long-term debt	33.4	36.4
Obligation under Supply and Offtake Agreements	102.8	332.5
Current portion of operating lease liabilities	47.8	40.5
Accrued expenses and other current liabilities	657.1	346.8
Total current liabilities	1,814.2	2,355.9
Non-current liabilities:
Long-term debt, net of current portion	2,440.6	2,030.7
Obligation Under Supply And Offtake Agreements, Noncurrent	220.4	144.8
Environmental liabilities, net of current portion	106.1	137.9
Asset retirement obligations	37.2	68.6
Deferred tax liabilities	316.2	267.9
Operating lease liabilities, net of current portion	132.6	144.3
Other non-current liabilities	37.4	30.9
Total non-current liabilities	3,290.5	2,825.1
Stockholders’ equity:
Preferred stock, $0.01 par value, 10,000,000 shares authorized, no shares issued and outstanding	0	0
Common stock, $0.01 par value, 110,000,000 shares authorized, 91,301,229 shares and 90,987,025 shares issued at September 30, 2020 and December 31, 2019, respectively	0.9	0.9
Additional paid-in capital	1,180.1	1,151.9
Accumulated other comprehensive income	0	0.1
Treasury stock, 17,575,527 shares and 17,516,814 shares, at cost, as of September 30, 2020 and December 31, 2019, respectively	(694.1)	(692.2)
Retained earnings	815.3	1,205.6
Non-controlling interests in subsidiaries	118.1	169
Total stockholders’ equity	1,420.3	1,835.3
Total liabilities and stockholders’ equity	$ 6,525	$ 7,016.3

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) - $ / shares	Sep. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	110,000,000	110,000,000
Common stock, shares issued (in shares)	91,301,229	90,987,025
Treasury stock, shares (in shares)	17,575,527	17,516,814

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Net revenues	$ 2,062.9	$ 2,334.3	$ 5,419.6	$ 7,014.5
Cost of sales:
Cost of materials and other	1,875.9	1,964.1	5,064.3	5,731.2
Operating expenses (excluding depreciation and amortization presented below)	115.7	141.7	348.3	418.4
Depreciation and amortization	59.4	43.8	160	125.7
Total cost of sales	2,051	2,149.6	5,572.6	6,275.3
Operating expenses related to retail and wholesale business (excluding depreciation and amortization presented below)	24	25.2	73.7	77.5
General and administrative expenses	57	65.6	184.4	197.3
Depreciation and amortization	5.8	6	17.4	21
Other operating loss (income), net	0.3	0.5	(14.6)	(0.7)
Total operating costs and expenses	2,138.1	2,246.9	5,833.5	6,570.4
Operating (loss) income	(75.2)	87.4	(413.9)	444.1
Interest expense	31.9	33.9	98	95.4
Interest income	(0.9)	(3.2)	(3.1)	(9)
Income from equity method investments	(12.8)	(16.5)	(28.6)	(28.4)
Loss (gain) on sale of non-operating refinery	0.1	0	(56.8)	0
Other (income) expense, net	(1)	(0.2)	(3.4)	3.3
Total non-operating expense, net	17.3	14	6.1	61.3
(Loss) income before income tax (benefit) expense	(92.5)	73.4	(420)	382.8
Income tax (benefit) expense	(15.6)	13.4	(134.6)	83.8
(Loss) income from continuing operations, net of tax	(76.9)	60	(285.4)	299
Discontinued operations:
Loss from discontinued operations, including loss on sale of discontinued operations	0	0	0	(1)
Income tax benefit	0	0	0	(0.2)
Loss from discontinued operations, net of tax	0	0	0	(0.8)
Net (loss) income	(76.9)	60	(285.4)	298.2
Net income attributed to non-controlling interests	11.2	8.7	29.4	20.3
Net (loss) income attributable to Delek US	$ (88.1)	$ 51.3	$ (314.8)	$ 277.9
Basic (loss) income per share:
(Loss) income from continuing operations (USD per share)	$ (1.20)	$ 0.68	$ (4.28)	$ 3.64
Loss from discontinued operations (USD per share)	0	0	0	(0.01)
Basic income (loss) per share (USD per Share)	(1.20)	0.68	(4.28)	3.63
Diluted (loss) income per share:
(Loss) income from continuing operations (USD per share)	(1.20)	0.68	(4.28)	3.61
Loss from discontinued operations (USD per share)	0	0	0	(0.01)
Diluted income (loss) per share (USD per share)	(1.20)	0.68	(4.28)	3.60
Dividends declared per common share outstanding (in dollars per share)	$ 0.31	$ 0.29	$ 0.93	$ 0.84

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net (loss) income	$ (76.9)	$ 60	$ (285.4)	$ 298.2
Other comprehensive income (loss):
Other income, net of taxes	0	0.1	0.1	0.5
Total other comprehensive loss	(0.5)	(15.6)	(0.1)	(17.9)
Comprehensive (loss) income	(77.4)	44.4	(285.5)	280.3
Comprehensive income (loss) attributable to Noncontrolling Interest	11.2	8.7	29.4	20.3
Comprehensive (loss) income attributable to Delek	(88.6)	35.7	(314.9)	260
Commodity contracts
Other comprehensive income (loss):
Net gains (losses) related to commodity cash flow hedges	(0.6)	(19.8)	(0.3)	(23.2)
Income tax expense (benefit)	(0.1)	(4.1)	(0.1)	(4.8)
Other comprehensive income (loss) related to commodity contracts, net	$ (0.5)	$ (15.7)	$ (0.2)	$ (18.4)

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income	Retained Earnings	Treasury Stock	Non-Controlling Interest in Subsidiaries	Commodity contracts	Commodity contractsAccumulated Other Comprehensive Income	Cumulative Effect, Period of Adoption, Adjustment [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]Retained Earnings
Beginning balance (shares) at Dec. 31, 2018		90,478,075				(12,477,780)
Beginning balance at Dec. 31, 2018	$ 1,808.1	$ 0.9	$ 1,135.4	$ 28.6	$ 981.8	$ (514.1)	$ 175.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	298.2				277.9		20.3
Other comprehensive income (loss) related to commodity contracts, net								$ (18.4)	$ (18.4)
Common stock dividends	(64.3)				(64.3)		0
Distribution to non-controlling interest	(23.8)						(23.8)
Equity-based compensation expense	$ 19.2		18.9				0.3
Repurchase of common stock (shares)	(4,175,576)					(4,175,576)
Repurchase of common stock	$ (147.8)					$ (147.8)	0
Taxes due to the net settlement of equity-based compensation	(8.4)		(8.4)				0
Exercise of equity-based awards (shares)		462,318
Other	0.6		0.2	0.5	(0.1)	0	0
Ending balance at Sep. 30, 2019	$ 1,863.4	$ 0.9	1,146.1	10.7	1,195.3	$ (661.9)	172.3
Ending balance (shares) at Sep. 30, 2019		90,940,393				(16,653,356)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock dividends per share (USD per share)	$ 0.84
Beginning balance (shares) at Jun. 30, 2019		90,861,698				(15,416,502)
Beginning balance at Jun. 30, 2019	$ 1,886.2	$ 0.9	1,140.3	26.3	1,165.9	$ (618.9)	171.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	60				51.3		8.7
Other comprehensive income (loss) related to commodity contracts, net								(15.7)	(15.7)
Common stock dividends	(21.8)				(21.8)		0
Distribution to non-controlling interest	(8.2)						(8.2)
Equity-based compensation expense	$ 7.4		7.3				0.1
Repurchase of common stock (shares)	(1,236,854)					(1,236,854)
Repurchase of common stock	$ (43)					$ (43)	0
Taxes due to the net settlement of equity-based compensation	(1.5)		(1.5)
Exercise of equity-based awards (shares)		78,695
Other	0		0	0.1	(0.1)	0	0
Ending balance at Sep. 30, 2019	$ 1,863.4	$ 0.9	1,146.1	10.7	1,195.3	$ (661.9)	172.3
Ending balance (shares) at Sep. 30, 2019		90,940,393				(16,653,356)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock dividends per share (USD per share)	$ 0.29
Beginning balance (shares) at Dec. 31, 2019		90,987,025				(17,516,814)
Beginning balance at Dec. 31, 2019	$ 1,835.3	$ 0.9	1,151.9	0.1	1,205.6	$ (692.2)	169			$ (6.5)	$ (6.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(285.4)				(314.8)		29.4
Other comprehensive income (loss) related to commodity contracts, net								(0.2)	(0.2)
Common stock dividends	(69)				(69)		0
Distribution to non-controlling interest	(25)						(25)
Equity-based compensation expense	$ 17.7		17.6				0.1
Repurchase of common stock (shares)	(58,713)					(58,713)
Repurchase of common stock	$ (1.9)					$ (1.9)	0
Repurchase of Non-Controlling Interest	(28.9)		(24.3)				(4.6)
Impact from IDR Simplification transaction of Delek Logistics LP	(13.6)		37.2				(50.8)
Taxes due to the net settlement of equity-based compensation	$ (2.3)		(2.3)				0
Exercise of equity-based awards (shares)	314,204	314,204
Other	$ 0.1		0	0.1	0	0	0
Ending balance at Sep. 30, 2020	$ 1,420.3	$ 0.9	1,180.1	0	815.3	$ (694.1)	118.1
Ending balance (shares) at Sep. 30, 2020		91,301,229				(17,575,527)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock dividends per share (USD per share)	$ 0.93
Beginning balance (shares) at Jun. 30, 2020		91,232,964				(17,575,527)
Beginning balance at Jun. 30, 2020	$ 1,559.3	$ 0.9	1,160.1	0.5	926.4	$ (694.1)	165.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(76.9)				(88.1)		11.2
Other comprehensive income (loss) related to commodity contracts, net								$ (0.5)	$ (0.5)
Common stock dividends	(23)				(23)
Distribution to non-controlling interest	(8.2)						(8.2)
Equity-based compensation expense	6.7		6.7
Repurchase of Non-Controlling Interest	(23.1)		(23.5)				0.4
Impact from IDR Simplification transaction of Delek Logistics LP	(13.6)		37.2				(50.8)
Taxes due to the net settlement of equity-based compensation	$ (0.4)		(0.4)
Exercise of equity-based awards (shares)	68,265	68,265
Ending balance at Sep. 30, 2020	$ 1,420.3	$ 0.9	$ 1,180.1	$ 0	$ 815.3	$ (694.1)	$ 118.1
Ending balance (shares) at Sep. 30, 2020		91,301,229				(17,575,527)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock dividends per share (USD per share)	$ 0.31

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parentheticals) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Stockholders' Equity [Abstract]
Common stock dividends per share (USD per share)	$ 0.31	$ 0.29	$ 0.93	$ 0.84

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net (loss) income	$ (285.4)	$ 298.2
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization	177.4	146.7
Other amortization/accretion	7.8	7.1
Non-Cash Lease Expense	34	29.6
Deferred income taxes	32.9	26.3
Income from equity method investments	(28.6)	(28.4)
Dividends from equity method investments	21.6	11.7
Non-cash lower of cost or market/net realizable value adjustment	65.6	(31.5)
Gain on sale of non-operating refinery	(56.8)	0
Equity-based compensation expense	17.7	19.2
Other	2.7	2.6
Loss from discontinued operations	0	0.8
Changes in assets and liabilities:
Accounts receivable	268.9	(319.4)
Inventories and other current assets	(42.1)	(180)
Fair value of derivatives	(0.5)	(12.8)
Accounts payable and other current liabilities	(464.9)	474.3
Obligation under Supply and Offtake Agreements	(154.1)	46.4
Non-current assets and liabilities, net	4	(41.6)
Net cash (used in) provided by operating activities	(399.8)	448.4
Cash flows from investing activities:
Equity method investment contributions	(30.8)	(214)
Distribution from equity method investments	72	0.8
Purchases of property, plant and equipment	(241.7)	(305.7)
Purchase of intangible assets	(2.6)	(0.8)
Proceeds from sale of property, plant and equipment	0.2	0.3
Proceeds from sale of retail stores	0	9.9
Proceed from sale of non-operating refinery	39.9	0
Net cash used in investing activities	(163)	(509.5)
Cash flows from financing activities:
Proceeds from long-term revolvers	1,798.1	1,278.4
Payments on long-term revolvers	(1,545.8)	(1,278.9)
Proceeds from term debt	185	246.8
Payments on term debt	(34.6)	(31.5)
Proceeds from product financing agreements	222	40.8
Repayments of product financing agreements	(79.4)	(22.2)
Taxes paid due to the net settlement of equity-based compensation	(2.3)	(8.4)
Repurchase of common stock	(1.9)	(147.8)
Repurchase of non-controlling interest	(28.9)	0
Distribution to non-controlling interest	(25)	(23.8)
Impact of IDR Simplification transaction of Delek Logistics LP	(2.1)	0
Dividends paid	(69)	(64.3)
Deferred financing costs paid	(0.7)	(0.9)
Net cash provided by (used in) financing activities	415.4	(11.8)
Net decrease in cash and cash equivalents	(147.4)	(72.9)
Cash and cash equivalents at the beginning of the period	955.3	1,079.3
Cash and cash equivalents of continuing operations at the end of the period	807.9	1,006.4
Cash paid during the period for:
Interest, net of capitalized interest	91.1	88.3
Income taxes	3.3	73.3
Non-cash investing activities:
(Decrease) increase in accrued capital expenditures	(33.9)	19.1
Non-cash financing activities:
Non-cash lease liability arising from recognition of right of use assets upon adoption of Accounting Standards Update ("ASU") 2016-02	0	211
Non-cash lease liability arising from obtaining right of use assets during the period	$ 30.7	$ 9.6

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Statement of Cash Flows [Abstract]
Interest Paid, Capitalized, Investing Activities	$ 0.2	$ 1.2

Organization and Basis of Prese

Organization and Basis of Presentation	9 Months Ended
	Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Basis of Presentation	Delek US Holdings, Inc. operates through its consolidated subsidiaries, which include Delek US Energy, Inc. ("Delek Energy") (and its subsidiaries) and Alon USA Energy, Inc. ("Alon") (and its subsidiaries). The terms "we," "our," "us," "Delek" and the "Company" are used in this report to refer to Delek and its consolidated subsidiaries. Delek's Common Stock is listed on the New York Stock Exchange ("NYSE") under the symbol "DK." Our condensed consolidated financial statements include the accounts of Delek and its subsidiaries. Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with U.S. Generally Accepted Accounting Principles ("GAAP") have been condensed or omitted, although management believes that the disclosures herein are adequate to make the financial information presented not misleading. Our unaudited condensed consolidated financial statements have been prepared in conformity with GAAP applied on a consistent basis with those of the annual audited consolidated financial statements included in our Annual Report on Form 10-K filed with the Securities and Exchange Commission ("SEC") on February 28, 2020 (the "Annual Report on Form 10-K") and in accordance with the rules and regulations of the SEC. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto for the year ended December 31, 2019 included in our Annual Report on Form 10-K. Our condensed consolidated financial statements include Delek Logistics Partners, LP ("Delek Logistics"), which is a variable interest entity. As the indirect owner of the general partner of Delek Logistics, we have the ability to direct the activities of this entity that most significantly impact its economic performance. We are also considered to be the primary beneficiary for accounting purposes for this entity and are Delek Logistics' primary customer. As Delek Logistics does not derive an amount of gross margin material to us from third parties, there is limited risk to Delek associated with Delek Logistics' operations. However, in the event that Delek Logistics incurs a loss, our operating results will reflect such loss, net of intercompany eliminations, to the extent of our ownership interest in this entity. In the opinion of management, all adjustments necessary for a fair presentation of the financial condition and the results of operations for the interim periods have been included. All significant intercompany transactions and account balances have been eliminated in consolidation. All adjustments are of a normal, recurring nature. Operating results for the interim period should not be viewed as representative of results that may be expected for any future interim period or for the full year. Accounting Policies With the exception of the policy updates below, there have been no new or material changes to the significant accounting policies discussed in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2019. Risks and Uncertainties Arising from the COVID-19 Pandemic and the OPEC Production Disputes The outbreak of COVID-19 and its development into a pandemic in March 2020 (the "COVID-19 Pandemic") has resulted in significant economic disruption globally, including in the U.S. and specific geographic areas where we operate. Actions taken by various governmental authorities, individuals and companies around the world to prevent the spread of COVID-19 through social distancing have restricted travel, many business operations, public gatherings and the overall level of individual movement and in-person interaction across the globe. This has in turn significantly reduced global economic activity and resulted in airlines dramatically cutting back on flights and a decrease in motor vehicle use at a time when seasonal driving patterns typically result in an increase of consumer demand for gasoline. As a result, there has also been a decline in the demand for, and thus also the market prices of, crude oil and certain of our products. In April and June 2020, an agreement was reached to cut oil production between the members of the Organization of Petroleum Exporting Countries ("OPEC") and other leading oil producing countries (together with OPEC, “OPEC+”), as part of the efforts to resolve the oil production disputes ("OPEC Production Disputes") that significantly affected crude oil prices beginning in first quarter of 2020 and to provide stability in the oil markets. While OPEC+ have reached an agreement to cut oil production, uncertainty about the duration of the COVID-19 Pandemic has caused storage constraints in the United States resulting from over-supply of produced oil. Therefore, downward pressure on commodity prices has remained and could continue for the foreseeable future. Uncertainties related to the impact of the COVID-19 Pandemic and other events exist that could impact our future results of operations and financial position, the nature of which and the extent to which are currently unknown. To the extent these uncertainties have been identified and are believed to have an impact on our current period results of operations or financial position based on the requirements for assessing such financial statement impact under GAAP, we have considered them in the preparation of our unaudited financial statements as of and for the three and nine months ended September 30, 2020. The application of accounting policies impacted by such considerations include (but are not necessarily limited to) the following: • The interim evaluation of the risk of credit losses and the determination of our allowance for credit losses, pursuant to GAAP; • The interim evaluation of long-lived assets for potential impairment, where indicators exist, as defined by GAAP; • The interim evaluation of indefinite-lived intangibles and goodwill for potential impairment, where indicators exist, as defined by GAAP; • The interim evaluation of joint ventures for potential impairment, where indicators exist, as defined by GAAP; • The evaluation of derivatives and hedge accounting for counterparty risk and changes in forecasted transactions, as provided for under GAAP; • The evaluation of inventory valuation allowances that may be warranted under the lower of cost or net realizable value analysis, for first-in, first-out (“FIFO”), and the lower of cost or market analysis, for last-in, first-out ("LIFO"), pursuant to GAAP; • The consideration of debt modifications and/or covenant requirements, as applicable; • The evaluation of commitments and contingencies, including changes in concentrations, as applicable; • The interim evaluation of the impact of changing forecasts on our assessment of deferred tax asset valuation allowances and annual effective tax rates; and • The interim evaluation of our ability to continue as a going concern. Credit Losses Under ASU 2016-13, Financial Instruments - Measurement of Credit Losses on Financial Instruments (as codified in Accounting Standards Codification ("ASC") 326), we have applied the expected credit loss model for recognition and measurement of impairments in financial assets measured at amortized cost or at fair value through other comprehensive income including accounts receivables. The expected credit loss model is also applied for notes receivables and contractual holdbacks to which ASU 2016-13 applies and which are not accounted for at fair value through profit or loss. The loss allowance for the financial asset is measured at an amount equal to the lifetime expected credit losses. If the credit risk on the financial asset has decreased significantly since initial recognition, the loss allowance for the financial asset is re-measured. Changes in loss allowances are recognized in profit and loss. For trade receivables, a simplified impairment approach is applied recognizing expected lifetime losses from initial recognition. Reclassifications Certain prior period amounts have been reclassified in order to conform to the current period presentation. New Accounting Pronouncements Adopted During 2020 ASU 2018-15, Intangible - Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract In August 2018, the Financial Accounting Standards Board (the "FASB") issued guidance related to customers’ accounting for implementation costs incurred in a cloud computing arrangement that is considered a service contract. This pronouncement aligns the requirements for capitalizing implementation costs in such arrangements with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. This pronouncement is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2019. We adopted this guidance on January 1, 2020 and the adoption did not have a material impact on our business, financial condition or results of operations. ASU 2018-13, Fair Value Measurement - Changes to the Disclosure Requirements for Fair Value Measurement In August 2018, the FASB issued guidance related to disclosure requirements for fair value measurements. The pronouncement eliminates, modifies and adds disclosure requirements for fair value measurements. The pronouncement is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2019, with early adoption permitted. We adopted this guidance on January 1, 2020 and the adoption did not have a material impact on our business, financial condition or results of operations. See Note 10. ASU 2016-13, Financial Instruments - Measurement of Credit Losses on Financial Instruments In June 2016, the FASB issued guidance requiring the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Organizations will now use forward-looking information to better inform their credit loss estimates. This guidance is effective for interim and annual periods beginning after December 15, 2019. We adopted this guidance on January 1, 2020 using the modified retrospective approach as of the adoption date. The adoption did not have a material impact on the Company’s operating results, financial position or disclosures. Accounting Pronouncements Not Yet Adopted ASU 2020-06, Debt— Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity In August 2020, the FASB issued ASU 2020-06, which is intended to simplify the accounting for certain financial instruments with characteristics of liabilities and equity, including convertible instruments and contracts in an entity's own equity. The guidance allows for either full retrospective adoption or modified retrospective adoption. The pronouncement is effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2021, and early adoption is permitted. The Company is evaluating the impact of this guidance but does not currently expect adopting this new guidance will have a material impact on its consolidated financial statements and related disclosures. ASU 2020-04, Facilitation of the Effects of Reference Rate Reform on Financial Reporting (Topic 848) In March 2020, the FASB issued an amendment which is intended to provide temporary optional expedients and exceptions to GAAP guidance on contracts, hedge accounting and other transactions affected by the expected market transition from the London Interbank Offered Rate ("LIBOR") and other interbank rates. This guidance is effective for all entities at any time beginning on March 12, 2020 through December 31, 2022 and may be applied from the beginning of an interim period that includes the issuance date of the ASU. The Company is currently evaluating the impact this guidance may have on its consolidated financial statements and related disclosures. ASU 2020-01, Investments—Equity Securities (Topic 321), Investments—Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815)—Clarifying the Interactions between Topic 321, Topic 323, and Topic 815 In January 2020, the FASB issued ASU 2020-01 which is intended to clarify interactions between the guidance to account for certain equity securities under Topics 321, 323 and 815, and improve current GAAP by reducing diversity in practice and increasing comparability of accounting. The pronouncement is effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2020, and early adoption is permitted. The Company is currently evaluating the impact this guidance may have on its consolidated financial statements and related disclosures. ASU 2019-12, Simplifying the Accounting for Income Taxes In December 2019, the FASB issued guidance intended to simplify various aspects related to accounting for income taxes, eliminate certain exceptions within ASC 740 and clarify certain aspects of the current guidance to promote consistency among reporting entities. The pronouncement is effective for fiscal years and for interim periods within those fiscal years beginning after December 15, 2020, with early adoption permitted. We expect to adopt this guidance on the effective date and are currently evaluating the impact that adopting this new guidance will have on our business, financial condition and results of operations. ASU 2018-14, Compensation - Changes to the Disclosure Requirements for Defined Benefit Plans In August 2018, the FASB issued guidance related to disclosure requirements for defined benefit plans. The pronouncement eliminates, modifies and adds disclosure requirements for defined benefit plans. The pronouncement is effective for fiscal years beginning after December 15, 2020, and early adoption is permitted. We expect to adopt this guidance on the effective date and do not expect adopting this new guidance will have a material impact on our business, financial condition or results of operations.

Segment Data

Segment Data	9 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Segment Data	We aggregate our operating units into three reportable segments: Refining, Logistics, and Retail. Operations that are not specifically included in the reportable segments are included in Corporate, Other and Eliminations, which consist of the following: • our corporate activities; • results of certain immaterial operating segments, including our Canadian crude trading operations (as discussed in Note 9); • wholesale crude operations; • Alon's asphalt terminal operations; and • intercompany eliminations. Decisions concerning the allocation of resources and assessment of operating performance are made based on this segmentation. Management measures the operating performance of each of the reportable segments based on the segment contribution margin. Segment contribution margin is defined as net revenues less cost of materials and other and operating expenses, excluding depreciation and amortization. During the first quarter of 2020, we revised the structure of the internal financial information reviewed by management and began allocating the results of hedging activity associated with managing risks of our refineries, previously reported in corporate, other and eliminations, to our refining segment. The historical results of this hedging activity have been reclassified to conform to the current presentation. The assets and/or liabilities associated with this hedging activity have not been allocated to the refining segment. Refining Segment The refining segment processes crude oil and other feedstocks for the manufacture of transportation motor fuels, including various grades of gasoline, diesel fuel and aviation fuel, asphalt and other petroleum-based products that are distributed through owned and third-party product terminals. The refining segment has a combined nameplate capacity of 302,000 barrels per day ("bpd") as of September 30, 2020, including the following: • 75,000 bpd Tyler, Texas refinery (the "Tyler refinery"); • 80,000 bpd El Dorado, Arkansas refinery (the "El Dorado refinery"); • 73,000 bpd Big Spring, Texas refinery (the "Big Spring refinery"); • 74,000 bpd Krotz Springs, Louisiana refinery (the "Krotz Springs refinery"); and • a non-operating refinery located in Bakersfield, California, which was sold May 7, 2020. The refining segment also owns and operates three biodiesel facilities involved in the production of biodiesel fuels and related activities, located in Crossett, Arkansas, Cleburne, Texas and New Albany, Mississippi (acquired in October 2019). The biodiesel industry has historically been substantially aided by federal and state tax incentives. One tax incentive program that has been significant to our renewable fuels facilities is the federal blender's tax credit (also known as the biodiesel tax credit or "BTC"). The BTC provides a $1.00 refundable tax credit per gallon of pure biodiesel to the first blender of biodiesel with petroleum-based diesel fuel. The blender's tax credit was re-enacted in December 2019 for the years 2020 through 2022 and was retroactively reinstated for 2018 and 2019. On May 7, 2020, we sold our equity interests in Alon Bakersfield Property, Inc., an indirect wholly-owned subsidiary that owns our non-operating refinery located in Bakersfield, California, to a subsidiary of Global Clean Energy Holdings, Inc. (“GCE”) for total cash consideration of $40.0 million. As a result of this sale, we recognized a gain of $56.8 million, largely due to the buyer assuming substantially all of the asset retirement obligations and environmental liabilities associated with this refinery, which is included in gain on sale of non-operating refinery on the accompanying condensed consolidated statements of income. As part of the transaction, GCE granted a call option to Delek to acquire up to a 33 1/3% interest in the acquiring subsidiary of GCE, exercisable by Delek through the 90th day after GCE demonstrates commercial operations, as contractually defined. The refining segment's petroleum-based products are marketed primarily in the south central, southwestern and western regions of the United States. This segment also ships and sells gasoline into wholesale markets in the southern and eastern United States. Motor fuels are sold under the Alon or Delek brand through various terminals to supply Alon or Delek branded retail sites. In addition, Alon sells motor fuels through its wholesale distribution network on an unbranded basis. Logistics Segment Our logistics segment owns and operates crude oil and refined products logistics and marketing assets. The logistics segment generates revenue by charging fees for gathering, transporting and storing crude oil and for marketing, distributing, transporting and storing intermediate and refined products in select regions of the southeastern United States and West Texas for our refining segment and third parties, and sales of wholesale products in the West Texas market. Retail Segment Our retail segment consists of 253 owned and leased convenience store sites as of September 30, 2020, located primarily in Central and West Texas and New Mexico. These convenience stores typically offer various grades of gasoline and diesel primarily under the Alon or Delek brand name and food products, food service, tobacco products, non-alcoholic and alcoholic beverages, general merchandise as well as money orders to the public, primarily under the 7-Eleven and Alon brand names. Substantially all of the motor fuel sold through our retail segment is supplied by our Big Spring refinery, which is transferred to the retail segment at prices substantially determined by reference to published commodity pricing information. In November 2018, we terminated the license agreement with 7-Eleven, Inc. This agreement was amended in April 2020 to extend the date for the required removal of all 7-Eleven branding on a store-by-store basis from December 31, 2021 to December 31, 2022. Merchandise sales at our convenience store sites will continue to be sold under the 7-Eleven brand name until 7-Eleven branding is removed at such convenience store sites. Significant Inter-segment Transactions All inter-segment transactions have been eliminated in consolidation and consist primarily of the following: • refining segment refined product sales to the retail segment to be sold through the store locations; • refining segment sales of asphalt and refined product to entities included in corporate, other and eliminations; • logistics segment service fee revenue under service agreements with the refining segment based on the number of gallons sold and to share a portion of the margin achieved in return for providing marketing, sales and customer services; • logistics segment sales of wholesale finished product to our refining segment; and • logistics segment crude transportation, terminalling and storage fee revenue from our refining segment for the utilization of pipeline, terminal and storage assets. Business Segment Operating Performance The following is a summary of business segment operating performance as measured by contribution margin for the period indicated (in millions): Three Months Ended September 30, 2020 (In millions) Refining Logistics Retail Corporate, Consolidated Net revenues (excluding inter-segment fees and revenues) $ 1,450.8 $ 49.4 $ 177.7 $ 385.0 $ 2,062.9 Inter-segment fees and revenues 112.7 92.8 — (205.5) — Operating costs and expenses: Cost of materials and other 1,479.2 60.7 136.3 199.7 1,875.9 Operating expenses (excluding depreciation and amortization presented below) 102.1 14.3 23.1 0.2 139.7 Segment contribution margin $ (17.8) $ 67.2 $ 18.3 $ (20.4) 47.3 Depreciation and amortization $ 50.3 $ 9.4 $ 2.9 $ 2.6 65.2 General and administrative expenses 57.0 Other operating loss, net 0.3 Operating loss $ (75.2) Capital spending (excluding business combinations) $ 0.6 $ 3.2 $ 0.7 $ 0.2 $ 4.7 Three Months Ended September 30, 2019 Refining (1) Logistics Retail Corporate, (1) Consolidated Net revenues (excluding inter-segment fees and revenues) $ 2,036.9 $ 71.4 $ 218.5 $ 7.5 $ 2,334.3 Inter-segment fees and revenues 139.9 66.2 — (206.1) — Operating costs and expenses: Cost of materials and other 1,906.0 72.6 176.4 (190.9) 1,964.1 Operating expenses (excluding depreciation and amortization presented below) 120.7 18.4 23.5 4.3 166.9 Segment contribution margin $ 150.1 $ 46.6 $ 18.6 $ (12.0) 203.3 Depreciation and amortization $ 34.6 $ 6.6 $ 3.0 $ 5.6 49.8 General and administrative expenses 65.6 Other operating loss, net 0.5 Operating income $ 87.4 Capital spending (excluding business combinations) $ 63.3 $ 4.0 $ 3.8 $ 39.4 $ 110.5 Nine Months Ended September 30, 2020 (In millions) Refining Logistics Retail Corporate, Consolidated Net revenues (excluding inter-segment fees and revenues) $ 4,021.9 $ 133.4 $ 521.7 $ 742.6 $ 5,419.6 Inter-segment fees and revenues 346.5 289.9 — (636.4) — Operating costs and expenses: Cost of materials and other 4,314.4 205.9 400.0 144.0 5,064.3 Operating expenses (excluding depreciation and amortization presented below) 302.5 41.5 66.8 11.2 422.0 Segment contribution margin $ (248.5) $ 175.9 $ 54.9 $ (49.0) (66.7) Depreciation and amortization $ 132.3 $ 24.4 $ 9.1 $ 11.6 177.4 General and administrative expenses 184.4 Other operating income, net (14.6) Operating loss $ (413.9) Capital spending (excluding business combinations) $ 180.9 $ 6.9 $ 8.2 $ 12.0 $ 208.0 Nine Months Ended September 30, 2019 Refining (1) Logistics Retail Corporate, (1) Consolidated Net revenues (excluding inter-segment fees and revenues) $ 6,096.7 $ 254.3 $ 640.2 $ 23.3 $ 7,014.5 Inter-segment fees and revenues 539.9 191.1 — (731.0) — Operating costs and expenses: Cost of materials and other 5,629.8 262.7 521.9 (683.2) 5,731.2 Operating expenses (excluding depreciation and amortization presented below) 356.7 51.8 71.9 15.5 495.9 Segment contribution margin $ 650.1 $ 130.9 $ 46.4 $ (40.0) 787.4 Depreciation and amortization $ 98.9 $ 19.8 $ 11.5 $ 16.5 146.7 General and administrative expenses 197.3 Other operating income, net (0.7) Operating income $ 444.1 Capital spending (excluding business combinations) $ 193.8 $ 6.2 $ 14.3 $ 110.5 $ 324.8 (1) The refining segment results of operations for the three and nine months ended September 30, 2019, includes hedging gains, a component of cost of materials and other, of $22.6 million and $50.0 million, respectively, which was previously included and reported in corporate, other and eliminations. Other Segment Information Total assets by segment were as follows as of September 30, 2020: Refining Logistics Retail Corporate, Consolidated Total assets $ 6,103.2 $ 957.7 $ 299.1 $ (835.0) $ 6,525.0 Less: Inter-segment notes receivable (1,326.3) — — 1,326.3 — Inter-segment right of use lease assets (393.8) — — 393.8 — Total assets, excluding inter-segment notes receivable and right of use assets $ 4,383.1 $ 957.7 $ 299.1 $ 885.1 $ 6,525.0 Property, plant and equipment and accumulated depreciation as of September 30, 2020 and depreciation expense by reporting segment for the three and nine months ended September 30, 2020 are as follows (in millions): Refining Logistics Retail Corporate, Consolidated Property, plant and equipment $ 2,558.2 $ 684.2 $ 164.8 $ 108.5 $ 3,515.7 Less: Accumulated depreciation (758.9) (216.7) (45.4) (70.8) (1,091.8) Property, plant and equipment, net $ 1,799.3 $ 467.5 $ 119.4 $ 37.7 $ 2,423.9 Depreciation expense for the three months ended September 30, 2020 $ 48.5 $ 9.5 $ 2.7 $ 2.6 $ 63.3 Depreciation expense for the nine months ended September 30, 2020 $ 127.3 $ 24.4 $ 8.5 $ 11.6 $ 171.8 In accordance with ASC 360, Property, Plant and Equipment ("ASC 360"), Delek evaluates the realizability of property, plant and equipment as events occur that might indicate potential impairment. There were no indicators of impairment related to our property, plant and equipment as of September 30, 2020 (see Note 1 for further discussion on the impact of COVID-19 Pandemic and OPEC Production Disputes).

Earnings (Loss) Per Share

Earnings (Loss) Per Share	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Earnings (Loss) Per Share	Basic earnings per share (or "EPS") is computed by dividing net income (loss) by the weighted average common shares outstanding. Diluted earnings per share is computed by dividing net income (loss), as adjusted for changes to income that would result from the assumed settlement of the dilutive equity instruments included in diluted weighted average common shares outstanding, by the diluted weighted average common shares outstanding. For all periods presented, we have outstanding various equity-based compensation awards that are considered in our diluted EPS calculation (when to do so would be dilutive), and is inclusive of awards disclosed in Note 15 to these condensed consolidated financial statements. For those instruments that are indexed to our common stock, they are generally dilutive when the market price of the underlying indexed share of common stock is in excess of the exercise price. The following table sets forth the computation of basic and diluted earnings per share. Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 Numerator: Numerator for EPS (Loss) income from continuing operations, net of tax $ (76.9) $ 60.0 $ (285.4) $ 299.0 Less: Income from continuing operations attributed to non-controlling interest 11.2 8.7 29.4 20.3 (Loss) Income from continuing operations attributable to Delek $ (88.1) $ 51.3 $ (314.8) $ 278.7 Numerator for EPS - discontinued operations Loss from discontinued operations attributable to Delek $ — $ — $ — $ (0.8) Denominator: Weighted average common shares outstanding (denominator for basic EPS) 73,669,310 75,028,562 73,551,970 76,463,435 Dilutive effect of stock-based awards — 673,749 — 704,399 Weighted average common shares outstanding, assuming dilution (denominator for diluted EPS) 73,669,310 75,702,311 73,551,970 77,167,834 EPS: Basic (loss) income per share: (Loss) Income from continuing operations $ (1.20) $ 0.68 $ (4.28) $ 3.64 Loss from discontinued operations — — $ — (0.01) Basic (loss) income per share $ (1.20) $ 0.68 $ (4.28) $ 3.63 Diluted (loss) income per share: (Loss) Income from continuing operations $ (1.20) $ 0.68 $ (4.28) $ 3.61 Loss from discontinued operations $ — — $ — (0.01) Diluted (loss) income per share $ (1.20) $ 0.68 $ (4.28) $ 3.60 The following equity instruments were excluded from the diluted weighted average common shares outstanding because their effect would be antidilutive: Antidilutive stock-based compensation (because average share price is less than exercise price) 3,873,055 1,846,919 3,807,699 2,003,283 Antidilutive due to loss 363,603 — 330,412 — Total antidilutive stock-based compensation 4,236,658 1,846,919 4,138,111 2,003,283

Equity Method Investments

Equity Method Investments	9 Months Ended
	Sep. 30, 2020
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	On July 30, 2019, we, through our wholly-owned direct subsidiary Delek US Energy, Inc. ("Delek Energy" or "Delek Member"), entered into a limited liability company agreement (the “LLCA”) and related agreements with multiple joint venture members of Wink to Webster Pipeline LLC (“WWP”). Pursuant to the LLCA, Delek Energy acquired a 15% ownership interest in WWP. WWP intends to construct and operate a crude oil pipeline system from Wink, Texas to Webster, Texas along with certain pipelines from Webster, Texas to other destinations in the Gulf Coast area. Pursuant to the LLCA, Delek Energy will be required to contribute its percentage interest of the applicable construction costs (including certain costs previously incurred by WWP) and, at the date we acquired our ownership interest, it was anticipated that Delek Energy’s capital contributions would total approximately $340 million to $380 million over the course of construction (expected to be two to three years). Construction of the crude oil pipeline system remains ongoing, where the main segment of the pipeline system connecting the Permian Basin to Houston, Texas was recently completed and began transporting crude oil in October 2020. During the nine months ended September 30, 2020 and September 30, 2019, we made capital contributions totaling $18.9 million and $75.3 million, respectively. As of December 31, 2019, Delek's investment balance in WWP totaled $125.3 million and we recognized a nominal amount of income on the investment for the three and nine months ended September 30, 2019. On February 21, 2020, we, through our wholly-owned direct subsidiary Delek Energy, entered into the W2W Holdings LLC ("HoldCo") Agreement with MPLX Operations LLC ("MPLX") (collectively, with its wholly-owned subsidiaries, the "WWP Project Financing Joint Venture" or the "WWP Project Financing JV"). The WWP Project Financing JV was created for the specific purpose of obtaining financing, through its wholly-owned subsidiary, W2W Finance LLC, to fund the majority of our combined capital calls resulting from and occurring during the construction period of the pipeline system under the WWP Joint Venture, and to service that debt. In connection with the arrangement, both Delek Energy and MPLX contributed their respective 15% ownership interests to the WWP Project Financing JV as collateral for and in service of the related project financing. Accordingly, distributions received from WWP through the WWP Project Financing JV will first be applied in service of the related project financing debt, with excess distributions being made to the members of the WWP Project Financing JV as provided for in the W2W Holdings LLC Agreement and as allowed under the project financing debt. The obligations of the members under the W2W Holdings LLC Agreement are guaranteed by the parents of the members of the WWP Project Financing JV. The Company evaluated Delek Member's investment in HoldCo and determined that HoldCo is a variable interest entity. The Company determined it is not the primary beneficiary since it does not have the power to direct activities that most significantly impact HoldCo. The Company does not hold a controlling financial interest in HoldCo because no single party has the power to direct the activities that most significantly impact HoldCo’s economic performance since power to make the decisions about the significant activities is shared equally with MPLX and all significant decisions require unanimous consent of the Board of Directors. The Company accounts for its investment in HoldCo using the equity method of accounting due to its significant influence with its 50% membership interest. The Company's maximum exposure to any losses incurred by HoldCo is limited to its investment. As of September 30, 2020, except for the guarantee of member obligations under the W2W Holdings LLC Agreement, the Company does not have other existing guarantees with or to HoldCo, or any third-party work contracted with it. As of September 30, 2020, Delek's investment balance in WWP Project Financing Joint Venture totaled $73.3 million and is included as part of total assets in corporate, other and eliminations in our segment disclosure. During the nine months ended September 30, 2020, we received distributions of $69.3 million from WWP Project Financing Joint Venture to return excess contributions made. In addition on the investment, we recognized income totaling $0.2 million and a loss of $1.8 million for the three and nine months ended September 30, 2020, respectively. Delek Logistics Investments In May 2019, Delek Logistics, through its wholly owned indirect subsidiary DKL Pipeline, LLC (“DKL Pipeline”), entered into a Contribution and Subscription Agreement (the “Contribution Agreement”) with Plains Pipeline, L.P. (“Plains”) and Red River Pipeline Company LLC (“Red River”). Pursuant to the Contribution Agreement, DKL Pipeline contributed $124.7 million, substantially all of which was financed under the Delek Logistics Credit Facility (as defined in Note 8), to Red River in exchange for a 33% membership interest in Red River and DKL Pipeline’s admission as a member of Red River (the "Red River Pipeline Joint Venture"). Red River owns a 16-inch crude oil pipeline running from Cushing, Oklahoma to Longview, Texas. In August 2020, Red River completed a planned expansion project to increase the pipeline capacity which commenced operations on October 1, 2020. Delek Logistics contributed an additional $3.5 million related to such expansion project in May 2019. During the nine months ended September 30, 2020, we made additional capital contributions totaling $11.8 million based on capital calls received. As of September 30, 2020 and December 31, 2019, Delek's investment balance in Red River totaled $143.5 million and $131.0 million, respectively. We recognized income on the investment totaling $2.0 million and $6.8 million for the three and nine months ended September 30, 2020, respectively and $4.7 million and $7.0 million for the three and nine months ended September 30, 2019, respectively. This investment is accounted for using the equity method and is included as part of total assets in our logistics segment. In addition to Red River, Delek Logistics has two joint ventures that own and operate logistics assets, and which serve third parties and subsidiaries of Delek. We own a 50% membership interest in the entity formed with an affiliate of Plains All American Pipeline, L.P. to operate one of these pipeline systems (the "Caddo Pipeline") and a 33% membership interest in Andeavor Logistics Rio Pipeline LLC which operates the other pipeline system (the "Rio Pipeline"). As of September 30, 2020 and December 31, 2019, Delek Logistics' investment balances in these joint ventures totaled $111.8 million and $116.0 million, respectively, and were accounted for using the equity method. We recognized income on these investments totaling $2.9 million and $10.1 million for the three and nine months ended September 30, 2020, respectively and $3.7 million and $7.9 million for the three and nine months ended September 30, 2019, respectively. Other Investments We have a 50% interest in a joint venture that owns an asphalt terminal located in Brownwood, Texas. As of September 30, 2020 and December 31, 2019, Delek's investment balance in this joint venture was $40.7 million and $30.7 million, respectively. We recognized income on this investment totaling $7.5 million and $13.0 million for the three and nine months ended September 30, 2020, respectively and $7.9 million and $13.1 million for the three and nine months ended September 30, 2019, respectively. This investment is accounted for using the equity method and is included as part of total assets in corporate, other and eliminations in our segment disclosure. Delek Renewables, LLC, a wholly-owned subsidiary of Delek, has a joint venture that owns, operates and maintains a terminal consisting of an ethanol unit train facility with an ethanol tank in North Little Rock, Arkansas. As of September 30, 2020 and December 31, 2019, Delek Renewables, LLC's investment balance in this joint venture was $3.8 million and $4.3 million, respectively, and was accounted for using the equity method. The investment in this joint venture is reflected in the refining segment.

Inventory

Inventory	9 Months Ended
	Sep. 30, 2020
Inventory Disclosure [Abstract]
Inventory	Crude oil, work in process, refined products, blendstocks and asphalt inventory for all of our operations, excluding the Tyler refinery and merchandise inventory in our retail segment, are stated at the lower of cost determined using FIFO basis or net realizable value. Cost of all inventory at the Tyler refinery is determined using the LIFO inventory valuation method and inventory is stated at the lower of cost or market. Retail merchandise inventory consists of cigarettes, beer, convenience merchandise and food service merchandise and is stated at estimated cost as determined by the retail inventory method. Carrying value of inventories consisted of the following (in millions): September 30, 2020 December 31, 2019 Refinery raw materials and supplies $ 261.4 $ 400.4 Refinery work in process 82.9 109.1 Refinery finished goods 299.1 397.5 Retail fuel 5.9 7.3 Retail merchandise 21.0 19.8 Logistics refined products 1.7 12.6 Total inventories $ 672.0 $ 946.7

Crude Oil Supply and Inventory

Crude Oil Supply and Inventory Purchase Agreement	9 Months Ended
	Sep. 30, 2020
Other Liabilities Disclosure [Abstract]
Crude Oil Supply and Inventory Purchase Agreement	Delek has Supply and Offtake Agreements with J. Aron & Company ("J. Aron") in connection with its El Dorado, Big Spring and Krotz Springs refineries (collectively, the "Supply and Offtake Agreements"). Pursuant to the Supply and Offtake Agreements, (i) J. Aron agrees to sell to us, and we agree to buy from J. Aron, at market prices, crude oil for processing at these refineries and (ii) we agree to sell, and J. Aron agrees to buy, at market prices, certain refined products produced at these refineries. The Supply and Offtake Agreements also provide for the lease to J. Aron of crude oil and refined product storage facilities, and the identification of prospective purchasers of refined products on J. Aron’s behalf. At the inception of the Supply and Offtake Agreements, we transferred title to a certain number of barrels of crude and other inventories to J. Aron (the "Step-In"), and the Supply and Offtake Agreements require the repurchase of remaining inventory (including certain "Baseline Volumes") at the termination of those Agreements (the "Step-Out"). The Supply and Offtake Agreements are accounted for as inventory financing arrangements under the fair value election provided by ASC 815 Derivatives and Hedging ("ASC 815") and ASC 825, Financial Instruments ("ASC 825"). Barrels subject to the Supply and Offtake Agreements are as follows: (in millions) El Dorado Big Spring Krotz Springs Baseline Volumes pursuant to the respective Supply and Offtake Agreements 2.0 0.8 1.3 Barrels of inventory consigned under the respective Supply and Offtake Agreements as of September 30, 2020 (1) 3.8 1.3 1.4 Barrels of inventory consigned under the respective Supply and Offtake Agreements as of December 31, 2019 (1) 3.5 2.0 1.7 (1) Includes Baseline Volumes plus/minus over/short quantities. The Supply and Offtake Agreements have certain termination provisions, which may include requirements to negotiate with third parties for the assignment to us of certain contracts, commitments and arrangements, including procurement contracts, commitments for the sale of product, and pipeline, terminalling, storage and shipping arrangements. The Supply and Offtake Agreements were amended in December 2018 for Big Spring and in January 2019 for El Dorado and Krotz Springs so that the Baseline Step-Out Liabilities, as defined below, were based upon a fixed price. As a result, we recorded gains on the change in fair value resulting from the modification in cost of materials and other in the periods in which the amendments occurred, including a gain of $7.6 million which was recognized in the first quarter of 2019. As a result of these amendments, the subsequent changes in fair value of the Baseline Step-Out Liabilities were recorded in interest expense. In January 2020, we amended our three Supply and Offtake Agreements so that the repurchase of Baseline Volumes at the end of the Supply and Offtake Agreement term (representing the "Baseline Step-Out Liability" or, collectively, the "Baseline Step-Out Liabilities") was based on market-indexed prices subject to commodity price risk. As a result of the amendment, such Baseline Step-Out Liabilities continued to be recorded at fair value under the fair value election provided by ASC 815 and ASC 825, where the fair value now reflected changes in commodity price risk rather than interest rate risk with subsequent changes in fair value being recorded in cost of materials and other. We recognized a loss in the first quarter of 2020 of $1.5 million on the change in fair value resulting from the modification. In April 2020, we amended and restated our three Supply and Offtake Agreements to renew and extend the terms to December 30, 2022, with J. Aron having the sole discretion to further extend to May 30, 2025 by giving at least 6 months prior notice to the current maturity date. As part of this amendment, there were changes to the underlying market index, annual fee, the crude purchase fee, crude roll fees and timing of cash settlements related to periodic price adjustments (the "Periodic Price Adjustments"). The Baseline Step-Out Liabilities continue to be recorded at fair value under the fair value election included under ASC 815 and ASC 825. The Baseline Step-Out Liabilities have a floating component whose fair value reflects changes to commodity price risk with changes in fair value recorded in cost of materials and other and a fixed component whose fair value reflects changes to interest rate risk with changes in fair value recorded in interest expense. There was no amendment date change in fair value resulting from the modification. The Baseline Step-Out Liabilities are reflected as non-current liabilities on our consolidated balance sheet to the extent that they are not contractually due within twelve months. Pursuant to the Periodic Price Adjustments provision in the Supply and Offtake Agreements, the Company may be required to pay down all or a portion of the fixed component of the Baseline Step-Out Liabilities or may receive additional proceeds depending on the change in fair value of the inventory collateral subject to a threshold at certain specified Periodic Pricing Dates, which occur on October 1st and May 1st, annually, not to extend beyond expiration of the Supply and Offtake Agreements. Additionally, at the Periodic Pricing Dates, if a Periodic Price Adjustment is triggered, the prospective pricing underlying the fixed component of the Baseline Step-Out Liabilities will be adjusted to reflect either the pay-down or the incremental proceeds, accordingly. As of September 30, 2020, the fixed component of the Baseline Step-Out Liabilities subject to the Periodic Price Adjustments amounted to approximately $58.8 million. All or some portion of that amount may become due or payable in periods occurring within twelve months, if Periodic Price Adjustments are triggered in October 2020 and May 2021. See Note 19 - Subsequent Events , for details on the subsequent Periodic Price Adjustment and paydown triggered on October 1, 2020. Monthly activity resulting in over and short volumes continue to be valued using market-indexed pricing, and are included in current liabilities (or receivables) on our consolidated balance sheet. Net balances payable (receivable) under the Supply and Offtake Agreements were as follows as of the balance sheet dates: (in millions) El Dorado Big Spring Krotz Springs Total Balances as of September 30, 2020: Baseline Step-Out Liability $ 100.5 $ 49.1 $ 70.8 $ 220.4 Revolving over/short inventory financing liability 80.6 19.7 2.5 102.8 Total Obligations Under Supply and Offtake Agreements 181.1 68.8 73.3 323.2 Less: Current portion 80.6 19.7 2.5 102.8 Obligations Under Supply and Offtake Agreements - Noncurrent portion $ 100.5 $ 49.1 $ 70.8 $ 220.4 Other current payable for monthly activity true-up $ 12.6 $ 1.0 $ — $ 13.6 (in millions) El Dorado Big Spring Krotz Springs Total Balances as of December 31, 2019: Baseline Step-Out Liability $ 125.5 $ 57.2 $ 87.6 $ 270.3 Revolving over/short inventory financing liability 93.0 73.5 40.5 207.0 Total Obligations Under Supply and Offtake Agreements 218.5 130.7 128.1 477.3 Less: Current portion 218.5 73.5 40.5 332.5 Obligations Under Supply and Offtake Agreements - Noncurrent portion $ — $ 57.2 $ 87.6 $ 144.8 Other current receivable for monthly activity true-up $ (16.4) $ (3.1) $ (3.5) $ (23.0) The Supply and Offtake Agreements require payments of fixed annual fees which are factored into the interest rate yield under the fair value accounting model. Recurring cash fees paid during the periods presented were as follows: (in millions) El Dorado Big Spring Krotz Springs Total Recurring cash fees paid during the three months ended September 30, 2020 $ 1.5 $ 0.7 $ 1.1 $ 3.3 Recurring cash fees paid during the three months ended September 30, 2019 $ 2.9 $ 1.5 $ 2.5 $ 6.9 Recurring cash fees paid during the nine months ended September 30, 2020 $ 7.4 $ 2.8 $ 3.1 $ 13.3 Recurring cash fees paid during the nine months ended September 30, 2019 $ 8.5 $ 4.4 $ 7.6 $ 20.5 Interest expense recognized under the Supply and Offtake Agreements includes the yield attributable to recurring cash fees, one-time cash fees (e.g., in connection with amendments), as well as other changes in fair value, which may increase or decrease interest expense. Total interest expense incurred during the periods presented was as follows: (in millions) El Dorado Big Spring Krotz Springs Total Interest expense for the three months ended September 30, 2020 $ 1.5 $ 0.7 $ 1.1 $ 3.3 Interest expense for the three months ended September 30, 2019 $ 3.7 $ 2.0 $ 2.7 $ 8.4 Interest expense for the nine months ended September 30, 2020 $ 7.8 $ 5.9 $ 3.5 $ 17.2 Interest expense for the nine months ended September 30, 2019 $ 10.9 $ 3.6 $ 8.8 $ 23.3 Reflected in interest expense are losses totaling $3.9 million for the nine months ended September 30, 2020, and gains totaling $7.7 million and gains totaling $11.4 million for the three and nine months ended September 30, 2019, respectively, related to the changes in fair value in the Baseline Step-Out Liabilities component of Obligations Under Supply and Offtake Agreements. There were no such gains or losses for three months ended September 30, 2020. We maintained letters of credit under the Supply and Offtake Agreements as follows: (in millions) El Dorado Big Spring and Krotz Springs Letters of credit outstanding as of September 30, 2020 $ 170.0 $ 10.0 Letters of credit outstanding as of December 31, 2019 $ 180.0 $ 44.0

Long-Term Obligations and Notes

Long-Term Obligations and Notes Payable	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Long-Term Obligations and Notes Payable	Outstanding borrowings, net of unamortized debt discounts and certain deferred financing costs, under Delek’s existing debt instruments are as follows (in millions): September 30, 2020 December 31, 2019 Revolving Credit Facility $ 110.0 $ 30.0 Term Loan Credit Facility (1) 1,248.6 1,069.5 Delek Logistics Credit Facility 760.7 588.4 Hapoalim Term Loan (2) 39.3 39.5 Delek Logistics Notes (3) 245.4 244.7 Reliant Bank Revolver 50.0 50.0 Promissory Notes 20.0 45.0 2,474.0 2,067.1 Less: Current portion of long-term debt and notes payable 33.4 36.4 $ 2,440.6 $ 2,030.7 (1) Net of deferred financing costs of $3.0 million and $3.5 million and debt discount of $24.7 million and $12.5 million at September 30, 2020 and December 31, 2019, respectively. (2) Net of deferred financing costs of $0.2 million and $0.3 million and debt discount of $0.2 million and $0.2 million at September 30, 2020 and December 31, 2019, respectively. (3) Net of deferred financing costs of $3.5 million and $4.0 million and debt discount of $1.1 million and $1.3 million at September 30, 2020 and December 31, 2019, respectively. Delek Revolver and Term Loan On March 30, 2018 (the "Closing Date"), Delek entered into (i) a new term loan credit agreement with Wells Fargo Bank, National Association, as administrative agent (the "Term Administrative Agent"), Delek, as borrower, certain subsidiaries of Delek, as guarantors, and the lenders from time to time party thereto, providing for a senior secured term loan facility in an amount of $700.0 million (the "Term Loan Credit Facility") and (ii) a second amended and restated credit agreement with Wells Fargo Bank, National Association, as administrative agent (the "Revolver Administrative Agent"), Delek, as borrower, certain subsidiaries of Delek, as guarantors, and the other lenders party thereto, providing for a senior secured asset-based revolving credit facility with commitments of $1.0 billion (the "Revolving Credit Facility" and, together with the Term Loan Credit Facility, the "New Credit Facilities"). The Revolving Credit Facility permits borrowings in Canadian dollars of up to $50.0 million. The Revolving Credit Facility also permits the issuance of letters of credit of up to $400.0 million, including letters of credit denominated in Canadian dollars of up to $10.0 million. Delek may designate restricted subsidiaries as additional borrowers under the Revolving Credit Facility. The Term Loan Credit Facility was drawn in full for $700.0 million on the Closing Date at an original issue discount of 0.50%. Proceeds under the Term Loan Credit Facility, as well as proceeds of approximately $300.0 million in borrowings under the Revolving Credit Facility on the Closing Date, were used to repay certain indebtedness of Delek and its subsidiaries (the “Refinancing”), as well as certain fees, costs and expenses in connection with the closing of the New Credit Facilities, with any remaining proceeds held in cash. Proceeds of future borrowings under the Revolving Credit Facility will be used for working capital and general corporate purposes of Delek and its subsidiaries. On May 22, 2019 (the "First Incremental Effective Date"), we amended the Term Loan Credit Facility agreement pursuant to the terms of the First Incremental Amendment to Term Loan Credit Agreement (the "Incremental Amendment"). Pursuant to the Incremental Amendment, the Company borrowed $250.0 million in aggregate principal amount of incremental term loans (the “Incremental Term Loans”) at an original issue discount of 0.75%, increasing the aggregate principal amount of loans outstanding under the Term Loan Credit Facility on the First Incremental Effective Date to $943.0 million. On November 12, 2019 (the "Second Incremental Effective Date"), we amended the Term Loan Credit facility agreement pursuant to the terms of the Second Incremental Amendment to the Term Loan Credit Agreement (the "Second Incremental Amendment") and borrowed $150.0 million in aggregate principal amount of incremental term loans (the "Incremental Loans") at an original issue discount of 1.21%, increasing the aggregate principal amount of loans outstanding under the Term Loan Credit Facility on the Second Incremental Effective Date to $1,088.3 million. The terms of the Incremental Term Loans and Incremental Loans are substantially identical to the terms applicable to the initial term loans under the Term Loan Credit Facility borrowed in March 2018. There are no restrictions on the Company's use of the proceeds of the Incremental Term Loans and Incremental Loans. The proceeds may be used for (i) reducing utilizations under the Revolving Credit Facility, (ii) general corporate purposes and (iii) paying transaction fees and expenses associated with the incremental amendments. On May 19, 2020, we amended the Term Loan Credit Facility agreement and borrowed $200.0 million in aggregate principal amount of incremental term loans (the “Third Incremental Term Loan”) at an original issue discount of 7.00%. The Third Incremental Term Loan constitutes a separate class of term loan (the "Class B Loan") under the Term Loan Credit Facility from those initially borrowed in March 2018 and the incremental term loans borrowed in May 2019 and November 2019 (collectively, the "Class A Loans"). Delek will be required to pay a make-whole prepayment fee if the Third Incremental Term Loan is prepaid pursuant to an optional prepayment, in connection with a non-permitted debt issuance or in connection with an acceleration within one year of the incurrence of the Third Incremental Term Loan. Delek may voluntarily prepay the outstanding Third Incremental Term Loans at any time subject to customary “breakage” costs with respect to LIBOR loans and subject to a prepayment premium of 1.00% in connection with certain customary repricing events that may occur during the period from the day after the first anniversary of the Third Incremental Term Loan through the second anniversary of the Third Incremental Term Loan. The other terms of the Third Incremental Term Loan are substantially identical to the terms applicable to the Class A Loans. The proceeds of the Third Incremental Term Loan may be used (i) for general corporate purposes and (ii) to pay transaction fees and expenses associated with the Third Incremental Term Loan. Interest and Unused Line Fees The interest rates applicable to borrowings under the Term Loan Credit Facility and the Revolving Credit Facility are based on a fluctuating rate of interest measured by reference to either, at Delek’s option, (i) a base rate, plus an applicable margin, or (ii) a reserve-adjusted LIBOR, plus an applicable margin (or, in the case of Revolving Credit Facility borrowings denominated in Canadian dollars, the Canadian dollar bankers' acceptances rate ("CDOR")). The initial applicable margin for all Term Loan Credit Facility borrowings was 1.50% per annum with respect to base rate borrowings and 2.50% per annum with respect to LIBOR borrowings. On October 26, 2018, Delek entered into an amendment to the Term Loan Credit Facility (the “First Amendment”) to reduce the margin on certain borrowings under the Term Loan Credit Facility and incorporate certain other changes. The First Amendment decreased the applicable margins for Class A Loans under (i) Base Rate Loans from 1.50% to 1.25% and (ii) LIBOR Rate Loans from 2.50% to 2.25%, as such terms are defined in the Term Loan Credit Facility. Class B Loans incurred under the Third Incremental Term Loan bear interest at a rate that is determined, at the Company’s election, at LIBOR or at base rate, in each case, plus an applicable margin of 5.50% with respect to LIBOR borrowings and 4.50% with respect to base rate borrowings. Additionally, Class B loans that are LIBOR borrowings are subject to a minimum LIBOR rate floor of 1.00%. The initial applicable margin for Revolving Credit Facility borrowings was 0.25% per annum with respect to base rate borrowings and 1.25% per annum with respect to LIBOR and CDOR borrowings, and the applicable margin for such borrowings after September 30, 2018 is based on Delek’s excess availability as determined by reference to a borrowing base, ranging from 0.25% to 0.75% per annum with respect to base rate borrowings and from 1.25% to 1.75% per annum with respect to LIBOR and CDOR borrowings. In addition, the Revolving Credit Facility requires Delek to pay an unused line fee on the average amount of unused commitments thereunder in each quarter, which the fee is at a rate of 0.25% or 0.375% per annum, depending on average commitment usage for such quarter. As of September 30, 2020, the unused line fee was 0.375% per annum. Maturity and Repayments The Revolving Credit Facility will mature and the commitments thereunder will terminate on March 30, 2023. The Term Loan Credit Facility matures on March 30, 2025 and requires scheduled quarterly principal payments on the last business day of the applicable quarter. Pursuant to the Incremental Amendment, quarterly payments increased from $1.75 million to $2.38 million. Pursuant to the Second Incremental Amendment, the quarterly payments increased to $2.75 million commencing with December 31, 2019. Additionally, the Term Loan Credit Facility requires prepayments by Delek with the net cash proceeds from certain debt incurrences, asset dispositions and insurance or condemnation events with respect to Delek’s assets, subject to certain exceptions, thresholds and reinvestment rights. The Term Loan Credit Facility also requires annual prepayments with a variable percentage of Delek’s excess cash flow, ranging from 50.0% to 0% depending on Delek’s consolidated fiscal year end secured net leverage ratio. The Third Incremental Term Loan requires quarterly payments on the Class B Loans of $0.5 million commencing June 30, 2020. Guarantee and Security The obligations of the borrowers under the New Credit Facilities are guaranteed by Delek and each of its direct and indirect, existing and future, wholly-owned domestic subsidiaries, subject to customary exceptions and limitations, and excluding Delek Logistics Partners, LP, Delek Logistics GP, LLC, and each subsidiary of the foregoing (collectively, the "MLP Subsidiaries"). Borrowings under the New Credit Facilities are also guaranteed by DK Canada Energy ULC, a British Columbia unlimited liability company and a wholly-owned restricted subsidiary of Delek. The Revolving Credit Facility is secured by a first priority lien over substantially all of Delek’s and each guarantor's receivables, inventory, renewable identification numbers, instruments, intercompany loan receivables, deposit and securities accounts and related books and records and certain other personal property, subject to certain customary exceptions (the "Revolving Priority Collateral"), and a second priority lien over substantially all of Delek's and each guarantor's other assets, including all of the equity interests of any subsidiary held by Delek or any guarantor (other than equity interests in certain MLP Subsidiaries) subject to certain customary exceptions, but excluding real property (such real property and equity interests, the "Term Priority Collateral"). The Term Loan Credit Facility is secured by a first priority lien on the Term Priority Collateral and a second priority lien on the Revolving Priority Collateral, all in accordance with an intercreditor agreement between the Term Administrative Agent and the Revolver Administrative Agent and acknowledged by Delek and the subsidiary guarantors. Certain excluded assets are not included in the Term Priority Collateral and the Revolving Priority Collateral. Additional Information At September 30, 2020, the weighted average borrowing rate under the Revolving Credit Facility was 3.50% and was comprised entirely of a base rate borrowing, and the principal amount outstanding thereunder was $110.0 million. Additionally, there were letters of credit issued of approximately $227.3 million as of September 30, 2020 under the Revolving Credit Facility. Unused credit commitments under the Revolving Credit Facility, as of September 30, 2020, were approximately $662.7 million. At September 30, 2020, the weighted average borrowing rate under the Term Loan Credit Facility was approximately 3.04% comprised entirely of LIBOR borrowings, and the principal amount outstanding thereunder was $1,276.3 million. As of September 30, 2020, the effective interest rate related to the Term Loan Credit Facility was 3.57%. Delek Hapoalim Term Loan On December 31, 2019, Delek entered into a term loan credit and guaranty agreement (the "Agreement") with Bank Hapoalim B.M. ("BHI") as the administrative agent. Pursuant to the Agreement, on December 31, 2019, Delek borrowed $40.0 million (the "BHI Term Loan"). The interest rate under the Agreement is equal to LIBOR plus a margin of 3.00%. The Agreement has a current maturity of December 31, 2022 and requires quarterly loan amortization payments of $0.1 million, commencing March 31, 2020. Proceeds may be used for general corporate purposes. The Agreement has an accordion feature that allows increasing the term loan to maximum size of $100.0 million, subject to receiving increased or new commitments from lenders and the satisfaction of certain other conditions precedent. Any such additional borrowings must be completed by December 31, 2021. At September 30, 2020, the weighted average borrowing rate under the term loan was approximately 3.15% comprised entirely of a LIBOR borrowing and the principal amount outstanding thereunder was $39.7 million. As of September 30, 2020, the effective interest rate related to the BHI Term Loan was 3.58%. Delek Logistics Credit Facility On September 28, 2018, Delek Logistics and all of its subsidiaries entered into a third amended and restated senior secured revolving credit agreement with Fifth Third Bank ("Fifth Third") as administrative agent and a syndicate of lenders (hereafter, the "Delek Logistics Credit Facility") with lender commitments of 850.0 million. The Delek Logistics Credit Facility also contains an accordion feature whereby Delek Logistics can increase the size of the credit facility to an aggregate of $1.0 billion, subject to receiving increased or new commitments from lenders and the satisfaction of certain other conditions precedent. The obligations under the Delek Logistics Credit Facility remain secured by first priority liens on substantially all of Delek Logistics' tangible and intangible assets. Additionally, a subsidiary of Delek provided a limited guaranty of Delek Logistics' obligations under the Delek Logistics Credit Facility. The guaranty was (i) limited to an amount equal to the principal amount, plus unpaid and accrued interest, of a promissory note made by Delek in favor of the subsidiary guarantor (the "Holdings Note") and (ii) secured by the subsidiary guarantor's pledge of the Holdings Note to the Delek Logistics Credit Facility lenders. Effective March 30, 2020, the limited guaranty and pledge of the Holdings Note was terminated pursuant to a guaranty and pledge release approved by the required lenders under the Delek Logistics Credit Facility. The Delek Logistics Credit Facility has a maturity date of September 28, 2023. Borrowings under the Delek Logistics Credit Facility bear interest at either a U.S. dollar prime rate, Canadian dollar prime rate, LIBOR, or a CDOR rate, in each case plus applicable margins, at the election of the borrowers and as a function of draw down currency. The applicable margin in each case and the fee payable for the unused revolving commitments vary based upon Delek Logistics' most recent total leverage ratio calculation delivered to the lenders, as called for and defined under the terms of the Delek Logistics Credit Facility. At September 30, 2020, the weighted average borrowing rate was approximately 2.69%. Additionally, the Delek Logistics Credit Facility requires Delek Logistics to pay a leverage ratio dependent quarterly fee on the average unused revolving commitment. As of September 30, 2020, this fee was 0.40% on an annualized basis. In connection with the elimination of IDRs in August 2020, Delek Logistics entered into a First Amendment to the Delek Logistics Credit Facility which, among other things, permitted the transfer of cash and equity consideration for the elimination of IDRs. It also modified the total leverage ratio and the senior leverage ratio (each as defined in the Delek Logistics Credit Facility) calculations to reduce the total funded debt (as defined in the Delek Logistics Credit Facility) component thereof by the total amount of unrestricted consolidated cash and cash equivalents on the balance sheet of the Delek Logistics and its subsidiaries up to $20.0 million. As of September 30, 2020, Delek Logistics had $760.7 million of outstanding borrowings under the Delek Logistics Credit Facility, with no letters of credit in place. Unused credit commitments under the Delek Logistics Credit Facility, as of September 30, 2020, were $89.3 million. Delek Logistics Notes On May 23, 2017, Delek Logistics and Delek Logistics Finance Corp. (collectively, the “Issuers”) issued $250.0 million in aggregate principal amount of 6.75% senior notes due 2025 (the “Delek Logistics Notes”) at a discount. The Delek Logistics Notes are general unsecured senior obligations of the Issuers. The Delek Logistics Notes are unconditionally guaranteed jointly and severally on a senior unsecured basis by Delek Logistics' existing subsidiaries (other than Delek Logistics Finance Corp., the "Guarantors") and will be unconditionally guaranteed on the same basis by certain of Delek Logistics' future subsidiaries. The Delek Logistics Notes rank equal in right of payme nt with all existing and future senior indebtedness of the Issuers, and senior in right of payment to any future subordinated indebtedness of the Issuers. Interest on the Delek Logistics Notes is payable semi-annually in arrears on each May 15 and November 15, commencing November 15, 2017. Beginning on May 15, 2020, th e Issuers may, subject to certain conditions and limitations, redeem all or part of the Delek Logistics Notes, at a redemption price of 105.063% of the redeemed principal for the twelve-month period beginning on May 15, 2020, 103.375% for the twelve-month period beginning on May 15, 2021, 101.688% for the twelve-month period beginning on May 15, 2022 and 100.00% beginning on May 15, 2023 and thereafter, plus accrued and unpaid interest, if any. In the event of a change of control, accompanied or followed by a ratings downgrade within a certain period of time, subject to certain conditions and limitations, the Issuers will be obligated to make an offer for the purchase of the Delek Logistics Notes from holders at a price equal to 101% of the principal amount thereof, plus accrued and unpaid interest. In May 2018, the Delek Logistics Notes were exchanged for new notes with terms substantially identical in all material respects with the 2025 Notes except the new notes do not contain terms with respect to transfer restrictions. As of September 30, 2020, we had $250.0 million in outstanding principal amount under the Delek Logistics Notes. As of September 30, 2020, the effective interest rate related to the Delek Logistics Notes was 7.22%. Reliant Bank Revolver Delek has an unsecured revolving credit agreement with Reliant Bank (the "Reliant Bank Revolver"). On December 16, 2019, we amended the Reliant Bank Revolver to extend the maturity date to June 30, 2022, reduce the fixed interest rate from 4.75% to 4.50% per annum and increase the revolver commitment amount from $30.0 million to $50.0 million. There were no other significant changes to the agreement . The revolving credit agreement requires us to pay a quarterly fee of 0.50% on an annualized basis on the average unused revolving commitment. As of September 30, 2020, we had $50.0 million outstanding and had no unused credit commitments under the Reliant Bank Revolver. Promissory Notes Delek has four notes payable (the "Promissory Notes") with various assignees of Alon Israel Oil Company, Ltd., the holder of a predecessor consolidated promissory note, which bear interest at a fixed rate of 5.50% per annum and which, collectively, require annual principal amortization payments of $25.0 million to be made each January through 2020, followed by a final principal amortization payment of $20.0 million at maturity on January 4, 2021. As of September 30, 2020, a total principal amount of $20.0 million was outstanding under the Promissory Notes. Restrictive Covenants Under the terms of our Revolving Credit Facility, Term Loan Credit Facility, Delek Logistics Credit Facility, Delek Logistics Notes, Reliant Bank Revolver and BHI Agreement, we are required to comply with certain usual and customary financial and non-financial covenants. The

Derivative Instruments

Derivative Instruments	9 Months Ended
	Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	We use the majority of our derivatives to reduce normal operating and market risks with the primary objective of reducing the impact of market price volatility on our results of operations. As such, our use of derivative contracts is aimed at: • limiting the exposure to price fluctuations of commodity inventory above or below target levels at each of our segments; • managing our exposure to commodity price risk associated with the purchase or sale of crude oil, feedstocks and finished grade fuel products at each of our segments; • managing the cost of our credits for commitments required by the U.S. Environmental Protection Agency ("EPA") to blend biofuels into fuel products ("RINs Obligation") using future commitments to purchase or sell renewable identification numbers ("RINs") at fixed prices and quantities; and • limiting the exposure to interest rate fluctuations on our floating rate borrowings. We primarily utilize commodity swaps, futures, forward contracts and options contracts, generally with maturity dates of three years or less, and from time to time interest rate swap or cap agreements, to achieve these objectives. Futures contracts are standardized agreements, traded on a futures exchange, to buy or sell the commodity at a predetermined price at a specified future date. Options provide the right, but not the obligation to buy or sell the commodity at a specified price in the future. Commodity swap and futures contracts require cash settlement for the commodity based on the difference between a fixed or floating price and the market price on the settlement date, and options require payment of an upfront premium. Because these derivatives are entered into to achieve objectives specifically related to our inventory and production risks, such gains and losses (to the extent not designated as accounting hedges and recognized on an unrealized basis in other comprehensive income) are recognized in cost of materials and other. Forward contracts are agreements to buy or sell a commodity at a predetermined price at a specified future date, and for our transactions, generally require physical delivery. Forward contracts where the underlying commodity will be used or sold in the normal course of business qualify as normal purchases and normal sales pursuant to ASC 815 and are not accounted for as derivative instruments. Rather, such forward contracts are accounted for under other applicable GAAP. Forward contracts entered into for trading purposes that do not meet the normal purchases, normal sales exception are accounted for as derivative instruments at fair value with changes in fair value recognized in earnings in the period of change. As of September 30, 2020 and December 31, 2019, and for the three and nine months ended September 30, 2020 and September 30, 2019, all of our forward contracts that were accounted for as derivative instruments primarily consisted of contracts related to our Canadian crude trading operations. Since Canadian crude trading activity is not related to managing supply or pricing risk of the actual inventory that will be used in production, such unrealized and realized gains and losses are recognized in other operating income, net rather than cost of materials and other on the accompanying condensed consolidated statements of income. Futures, swaps or other commodity related derivative instruments that are utilized to specifically provide economic hedges on our Canadian forward contract or investment positions are recognized in other operating income, net because that is where the related underlying transactions are reflected. From time to time, we also enter into future commitments to purchase or sell RINs at fixed prices and quantities, which are used to manage the costs associated with our RINs Obligation. These future RIN commitment contracts meet the definition of derivative instruments under ASC 815 , and are recorded at estimated fair value in accordance with the provisions of ASC 815. Changes in the fair value of these future RIN commitment contracts are recorded in cost of materials and other on the condensed consolidated statements of income. As of September 30, 2020, we do not believe there is any material credit risk with respect to the counterparties to any of our derivative contracts. In accordance with ASC 815, certain of our commodity swap contracts have been designated as cash flow hedges and the change in fair value between the execution date and the end of period has been recorded in other comprehensive income. The fair value of these contracts is recognized in income in the same financial statement line item as hedged transaction at the time the positions are closed and the hedged transactions are recognized in income. The following table presents the fair value of our derivative instruments as of September 30, 2020 and December 31, 2019. The fair value amounts below are presented on a gross basis and do not reflect the netting of asset and liability positions permitted under our master netting arrangements, including cash collateral on deposit with our counterparties. We have elected to offset the recognized fair value amounts for multiple derivative instruments executed with the same counterparty in our financial statements. As a result, the asset and liability amounts below differ from the amounts presented in our condensed consolidated balance sheets. See Note 10 for further information regarding the fair value of derivative instruments (in millions). September 30, 2020 December 31, 2019 Derivative Type Balance Sheet Location Assets Liabilities Assets Liabilities Derivatives not designated as hedging instruments: Commodity derivatives (1) Other current assets $ 90.9 $ (71.3) $ 188.9 $ (202.1) Commodity derivatives (1) Other current liabilities 881.2 (896.2) 24.4 (34.0) Commodity derivatives (1) Other long-term assets 0.1 — — — Commodity derivatives (1) Other long-term liabilities 374.9 (376.7) 23.4 (24.8) RIN commitment contracts (2) Other current assets 2.9 — 0.6 — RIN commitment contracts (2) Other current liabilities — (1.1) — (1.9) Derivatives designated as hedging instruments: Commodity derivatives (1) Other current assets 2.7 (1.5) 3.4 (2.0) Commodity derivatives (1) Other long-term assets — — 0.2 (0.1) Total gross fair value of derivatives $ 1,352.7 $ (1,346.8) $ 240.9 $ (264.9) Less: Counterparty netting and cash collateral (3) 1,319.6 (1,328.7) 210.7 (249.5) Total net fair value of derivatives $ 33.1 $ (18.1) $ 30.2 $ (15.4) (1) As of September 30, 2020 and December 31, 2019, we had open derivative positions representing 193,693,716 and 86,484,065 barrels, respectively, of crude oil and refined petroleum products. Of these open positions, contracts representing 90,000 and 600,000 barrels were designated as cash flow hedging instruments as of September 30, 2020 and December 31, 2019, respectively. Additionally, as of September 30, 2020 and December 31, 2019, we had open derivative positions representing 13,180,000 and 40,050,000 One Million British Thermal Units ("MMBTU") of natural gas products, respectively. (2) As of September 30, 2020 and December 31, 2019, we had open RIN commitment contracts representing 59,200,000 and 147,000,000 RINs, respectively. (3) As of September 30, 2020 and December 31, 2019, $9.1 million and $38.8 million, respectively, of cash collateral held by counterparties has been netted with the derivatives with each counterparty. Total gains on our hedging derivatives and RIN commitment contracts recorded in the condensed consolidated statements of income are as follows (in millions): Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Gains (losses) on commodity derivatives not designated as hedging instruments recognized in cost of materials and other (1) $ 5.1 $ 34.2 $ (85.8) $ 118.5 Gains (losses) on commodity derivatives not designated as hedging instruments recognized in other operating income, net (1) (2) 0.1 (0.3) 7.9 0.2 Realized gains (losses) reclassified out of accumulated other comprehensive income and into cost of materials and other on commodity derivatives designated as cash flow hedging instruments 0.8 (21.1) 3.7 (55.0) Total gains (losses) $ 6.0 $ 12.8 $ (74.2) $ 63.7 (1) Gains (losses) on commodity derivatives that are economic hedges but not designated as hedging instruments include unrealized (losses) gains of $(19.4) million and $9.2 million for the three and nine months ended September 30, 2020, respectively, and $0.5 million and $(30.1) million for the three and nine months ended September 30, 2019, respectively. Of these amounts, approximately $0.4 million and $(13.0) million as of September 30, 2020 and September 30, 2019, respectively, represent unrealized gains (losses) where the instrument has matured but where it has not cash settled as of period end. Derivative instruments that have matured but not cash settled at the balance sheet date continue to be reflected in derivative assets or liabilities on our balance sheet. (2) See separate table below for disclosures about "trading derivatives." The effect of cash flow hedge accounting on the condensed consolidated statements of income is as follows (in millions): Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Gain (loss) on cash flow hedging relationships recognized in cost of materials and other: Commodity contracts: Hedged items $ (0.8) $ 21.1 $ (3.7) $ 55.0 Derivative designated as hedging instruments 0.8 (21.1) 3.7 (55.0) Total $ — $ — $ — $ — For cash flow hedges, no component of the derivative instruments’ gains or losses was excluded from the assessment of hedge effectiveness for the three and nine months ended September 30, 2020 or 2019. Gains, net of tax, on settled commodity contracts of $0.7 and $3.0 million during the three and nine months ended September 30, 2020, respectively, and $(16.6) million and $(43.4) million during the three and nine months ended September 30, 2019, respectively, were reclassified into cost of materials and other in the condensed consolidated statements of income. As of September 30, 2020, we estimate that $1.2 million of deferred gains related to commodity cash flow hedges will be reclassified into cost of materials and other over the next 12 months as a result of hedged transactions that are forecasted to occur. Total (losses) gains on our trading physical forward contract derivatives (none of which were designated as hedging instruments) recorded in other operating loss (income), net on the condensed consolidated statements of income are as follows (in millions): Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Realized (losses) gains $ (0.4) $ (1.4) $ (3.4) $ 3.3 Unrealized (losses) gains 0.2 4.5 (0.5) 6.6 Total $ (0.2) $ 3.1 $ (3.9) $ 9.9

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Fair Value Measurements	Delek applies the provisions of ASC 820, Fair Value Measurements ("ASC 820"), which defines fair value, establishes a framework for its measurement and expands disclosures about fair value measurements. ASC 820 requires disclosures that categorize assets and liabilities measured at fair value into one of three different levels depending on the observability of the inputs employed in the measurement. Level 1 inputs are quoted prices in active markets for identical assets or liabilities. Level 2 inputs are observable inputs other than quoted prices included within Level 1 for the asset or liability, either directly or indirectly through market-corroborated inputs. Level 3 inputs are unobservable inputs for the asset or liability reflecting our assumptions about pricing by market participants. Our commodity derivative contracts, which consist of commodity swaps, exchange-traded futures, options and physical commodity forward purchase and sale contracts (that do not qualify as normal purchases or normal sales exception under ASC 815), are valued based on exchange pricing and/or price index developers such as Platts or Argus and are, therefore, classified as Level 2. Investment commodities, which represent those commodities (generally crude oil) physically on hand as a result of trading activities with physical forward contracts, are valued using published market prices of the commodity on the applicable exchange and are, therefore, classified as Level 1. Such investment stores, included in other current assets on the condensed consolidated balance sheets, are maintained on a weighted average cost basis for determining realized gains and losses on physical sales under forward contracts, and ending balances are adjusted to fair value at each reporting date. The unrealized gain (loss) on commodity investments for the three and nine months ended September 30, 2020 totaled $0.1 million and $1.0 million, respectively, and totaled $0.1 million and $(1.9) million for the three and nine months ended September 30, 2019, respectively. In April 2020, we entered into a contract with the Department of Energy to deposit one million barrels of crude oil into one of the Strategic Petroleum Reserve ("SPR") storage locations where they will be stored on our behalf until October 2020 for a fee of approximately 100,000 barrels. The fee of 100,000 barrels was recorded as a prepaid asset at cost, and the right to receive the 900,000 barrels was recorded as a financial asset (the "Right to receive crude oil barrels"), measured at fair value based on the value of the underlying commodity using published market prices of the commodity on the applicable exchange. Such asset is, therefore, classified as Level 2. The unrealized gain on the underlying commodity related to the SPR financial asset for the three and nine months ended September 30, 2020 of $0.9 million and $10.6 million was recorded in other (income) expense, net. Our RIN commitment contracts are future commitments to purchase or sell RINs at fixed prices and quantities, which are used to manage the costs associated with our RINs Obligation. These RIN commitment contracts are categorized as Level 2, and are measured at fair value based on quoted prices from an independent pricing service. Our environmental credits obligation surplus or deficit is based on the amount of RINs or other emissions credits subject to fair value accounting that we must purchase, net of amounts internally generated and purchased and the price of those RINs or other emissions credits as of the balance sheet date, by refinery/obligor. The environmental credits obligation surplus or deficit is categorized as Level 2 if measured at fair value either directly through observable inputs or indirectly through market-corroborated inputs. As of and for the nine months ended September 30, 2020 and 2019, we elected to account for our J. Aron step-out liability at fair value in accordance with ASC 825 , as it pertains to the fair value option. This standard permits the election to carry financial instruments and certain other items similar to financial instruments at fair value on the balance sheet, with all changes in fair value reported in earnings. With respect to the amended and restated Supply and Offtake Agreements, such amendments being effective April 2020 for all the agreements, we apply fair value measurement as follows: (1) we determine fair value for our amended variable step-out liability based on changes in fair value related to market volatility based on a floating commodity-index price, and for our amended fixed step-out liability based on changes to interest rates and the timing and amount of expected future cash settlements where such obligation is categorized as Level 2. Gains (losses) related to changes in fair value due to commodity-index price are recorded as a component of cost of materials and other, and changes in fair value due to interest rate risk are recorded as a component of interest expense in the condensed consolidated statements of income; and (2) we determine fair value of the commodity-indexed revolving over/short inventory financing liability based on the market prices for the consigned crude oil and refined products collateralizing the financing/funding where such obligation is categorized as Level 2 and is presented in the current portion of the Obligation under Supply and Offtake Agreements on our condensed consolidated balance sheets. Gains (losses) related to the change in fair value are recorded as a component of cost of materials and other in the condensed consolidated statements of income. Before the January 2020 amendments, we determined the fair value for the fixed price step-out liability based on changes to interest rates reflecting changes to the interest rate risk, with obligation categorized as Level 2. For all other financial instruments, the fair value approximates the historical or amortized cost basis comprising our carrying value and therefore are not included in the table below. The fair value hierarchy for our financial assets and liabilities accounted for at fair value on a recurring basis was as follows (in millions): September 30, 2020 Level 1 Level 2 Level 3 Total Assets Commodity derivatives $ — $ 1,349.8 $ — $ 1,349.8 Commodity investments 1.0 — — 1.0 Right to receive crude oil barrels — 36.6 — 36.6 RIN commitment contracts — 2.9 — 2.9 Total assets 1.0 1,389.3 — 1,390.3 Liabilities Commodity derivatives — (1,345.7) — (1,345.7) RIN commitment contracts — (1.1) — (1.1) Environmental credits obligation deficit — (233.6) — (233.6) J. Aron supply and offtake obligations — (323.2) — (323.2) Total liabilities — (1,903.6) — (1,903.6) Net assets (liabilities) $ 1.0 $ (514.3) $ — $ (513.3) December 31, 2019 Level 1 Level 2 Level 3 Total Assets Commodity derivatives $ — $ 240.3 $ — $ 240.3 Investment commodities 12.1 — — 12.1 RIN commitment contracts — 0.6 — 0.6 Environmental credits obligation surplus — 16.8 — 16.8 Total assets 12.1 257.7 — 269.8 Liabilities Commodity derivatives — (263.0) — (263.0) RIN commitment contracts — (1.9) — (1.9) Environmental credits obligation deficit — (18.5) — (18.5) J. Aron supply and offtake obligations — (477.3) — (477.3) Total liabilities — (760.7) — (760.7) Net assets (liabilities) $ 12.1 $ (503.0) $ — $ (490.9) The derivative values above are based on analysis of each contract as the fundamental unit of account as required by ASC 820. In the table above, derivative assets and liabilities with the same counterparty are not netted where the legal right of offset exists. This differs from the presentation in the financial statements which reflects our policy, wherein we have elected to offset the fair value amounts recognized for multiple derivative instruments executed with the same counterparty and where the legal right of offset exists. As of September 30, 2020 and December 31, 2019, $9.1 million and $38.8 million, respectively, of cash collateral was held by counterparty brokerage firms and has been netted in the financial statements with the net derivative positions with each counterparty. See Note 9 for further information regarding derivative instruments.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Litigation In the ordinary conduct of our business, we are from time to time subject to lawsuits, investigations and claims, including environmental claims and employee-related matters. Although we cannot predict with certainty the ultimate resolution of lawsuits, investigations and claims asserted against us, including civil penalties or other enforcement actions, we do not believe that any currently pending legal proceeding or proceedings to which we are a party will have a material adverse effect on our financial statements. Certain environmental matters that have or may result in penalties or assessments are discussed below in the " Environmental, Health and Safety" section of this note. One of our Alon subsidiaries was the defendant in a legal action related to an easement dispute arising from a purchase of property that occurred in October 2013. In June 2019, the court found in favor of the plaintiffs and assessed damages against such subsidiary, which were reduced in the fourth quarter of 2019 to $6.4 million. Such amount is included as of September 30, 2020 in accrued expenses and other current liabilities on the accompanying condensed consolidated balance sheet. Self-insurance Delek records a self-insurance accrual for workers’ compensation claims up to a $4.0 million deductible on a per accident basis, general liability claims up to $4.0 million on a per occurrence basis and medical claims for eligible full-time employees up to $0.3 million per covered individual per calendar year. We also record a self-insurance accrual for auto liability up to a $4.0 million deductible on a per accident basis. We have umbrella liability insurance available to each of our segments in an amount determined reasonable by management. Environmental, Health and Safety We are subject to extensive federal, state and local environmental and safety laws and regulations enforced by various agencies, including the EPA, the United States Department of Transportation, the Occupational Safety and Health Administration, as well as numerous state, regional and local environmental, safety and pipeline agencies. These laws and regulations govern the discharge of materials into the environment, waste management practices, pollution prevention measures and the composition of the fuels we produce, as well as the safe operation of our plants and pipelines and the safety of our workers and the public. Numerous permits or other authorizations are required under these laws and regulations for the operation of our refineries, renewable fuels facilities, terminals, pipelines, underground storage tanks, trucks, rail cars and related operations, and may be subject to revocation, modification and renewal. These laws and permits raise potential exposure to future claims and lawsuits involving environmental and safety matters which could include soil and water contamination, air pollution, personal injury and property damage allegedly caused by substances which we manufactured, handled, used, released or disposed of, transported, or that relate to pre-existing conditions for which we have assumed responsibility. We believe that our current operations are in substantial compliance with existing environmental and safety requirements. However, there have been and will continue to be ongoing discussions about environmental and safety matters between us and federal and state authorities, including notices of violations, citations and other enforcement actions, some of which have resulted or may result in changes to operating procedures and in capital expenditures. While it is often difficult to quantify future environmental or safety related expenditures, we anticipate that continuing capital investments and changes in operating procedures will be required for the foreseeable future to comply with existing and new requirements, as well as evolving interpretations and more strict enforcement of existing laws and regulations. As of September 30, 2020, we have recorded an environmental liability of approximately $112.7 million, primarily related to the estimated probable costs of remediating or otherwise addressing certain environmental issues of a non-capital nature at our refineries, as well as terminals, some of which we no longer own. This liability includes estimated costs for ongoing investigation and remediation efforts for known contamination of soil and groundwater. Approximately $6.6 million of the total liability is expected to be expended over the next 12 months, with most of the balance expended by 2032, although some costs may extend up to 30 years. In the future, we could be required to extend the expected remediation period or undertake additional investigations of our refineries, pipelines and terminal facilities, which could result in the recognition of additional remediation liabilities. Crude Oil and Other Releases We have experienced several crude oil and other releases involving our assets. There were no material releases that occurred during the nine months ended September 30, 2020. For releases that occurred in prior years, we have received regulatory closure or a majority of the cleanup and remediation efforts are substantially complete. For the release sites that have not yet received regulatory closure, we expect to receive regulatory closure in late 2020 or 2021 and do not anticipate material costs associated with any fines or penalties or to complete activities that may be needed to achieve regulatory closure. Expenses incurred for the remediation of these crude oil and other releases are included in operating expenses in our consolidated statements of income. Letters of Credit

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Under ASC 740, Income Taxes (“ASC 740”) we used an estimated annual tax rate to record income taxes for the three and nine months ended September 30, 2020 and September 30, 2019. Our effective tax rate was 16.9% and 32.0% for the three and nine months ended September 30, 2020, respectively, compared to 18.3% and 21.9% for the three and nine ended September 30, 2019, respectively. The difference between the effective tax rate and the statutory rate is generally attributable to permanent differences and discrete items. The change in our effective tax rate for the three and nine months ended September 30, 2020 as compared to the three and nine months ended September 30, 2019 was primarily due to tax benefit for federal tax credits attributable to the Company’s biodiesel blending operations that were re-enacted in December 2019, reversal of a valuation allowance for deferred tax assets in partnership investments due to changes in the future realizability of deferred tax basis differences, and expected net operating loss carryback provided under the CARES Act which allows the Company to recover federal taxes paid in prior years at a 35% tax rate creating a 14% tax rate benefit.

Related Party Transactions (Not

Related Party Transactions (Notes)	9 Months Ended
	Sep. 30, 2020
Related Party Transactions [Abstract]
Related Party Transactions	Our related party transactions consist primarily of transactions with our equity method investees (See Note 5). Transactions with our related parties were as follows for the periods presented: Three Months Ended September 30, Nine Months Ended September 30, (in millions) 2020 2019 2020 2019 Revenues (1) $ 27.6 $ 45.1 $ 57.5 $ 73.3 Cost of materials and other (2) $ 10.9 $ 20.3 $ 31.4 $ 33.7 (1) Consists primarily of asphalt sales which are recorded in corporate, other and eliminations segment. (2) Consists primarily of pipeline throughput fees paid by the refining segment and asphalt purchases.

Other Assets and Liabilities

Other Assets and Liabilities	9 Months Ended
	Sep. 30, 2020
Other Assets and Liabilities [Abstract]
Other Assets and Liabilities	The detail of other current assets is as follows (in millions): Other Current Assets September 30, 2020 December 31, 2019 RINs assets $ 231.1 $ 14.5 Income and other tax receivables 181.1 61.9 Right to receive crude oil barrels (see Note 10) 36.6 — Short-term derivative assets (see Note 9) 33.0 30.2 Prepaid expenses 19.2 21.9 Environmental Credits Obligation surplus (see Note 10) 7.3 16.8 Biodiesel tax credit (see Note 2) 3.2 97.5 Investment commodities 1.0 12.1 Other 3.4 13.8 Total $ 515.9 $ 268.7 The detail of other non-current assets is as follows (in millions): Other Non-Current Assets September 30, 2020 December 31, 2019 Supply and Offtake receivable $ 32.7 $ 32.7 Other equity Investments 10.4 8.9 Deferred financing costs 7.3 8.5 Other 18.1 17.7 Total $ 68.5 $ 67.8 The detail of accrued expenses and other current liabilities is as follows (in millions): Accrued Expenses and Other Current Liabilities September 30, 2020 December 31, 2019 Environmental Credits Obligation deficit (see Note 10) $ 237.6 $ 18.5 Product financing agreements 168.5 21.1 Income and other taxes payable 88.3 119.6 Crude purchase liabilities 74.3 72.1 Employee costs 23.8 47.6 Short-term derivative liabilities (see Note 9) 16.3 14.1 Interest payable 9.6 8.8 Environmental liabilities (see Note 11) 6.6 8.2 Accrued utilities 3.7 4.4 Tank inspection liabilities 3.1 5.6 Other 25.3 26.8 Total $ 657.1 $ 346.8 The detail of other non-current liabilities is as follows (in millions): Other Non-Current Liabilities September 30, 2020 December 31, 2019 Liability for unrecognized tax benefits $ 15.2 $ 12.1 Tank inspection liabilities 9.4 9.9 Pension and other postemployment benefit liabilities, net 3.1 5.3 Long-term derivative liabilities (see Note 9) 1.8 1.4 Deferred payroll taxes 7.8 — Other 0.1 2.2 Total $ 37.4 $ 30.9

Equity-Based Compensation

Equity-Based Compensation	9 Months Ended
	Sep. 30, 2020
Share-based Payment Arrangement [Abstract]
Equity-Based Compensation	Delek US Holdings, Inc. 2006 and 2016 and Alon USA Energy, Inc. 2005 Long-Term Incentive Plans (collectively, the "Incentive Plans") On May 5, 2020, the Company's stockholders approved an amendment to the Delek US Holdings, Inc. 2016 Long-Term Incentive Plan that increased the number of shares of Common Stock available for issuance under this plan by 2,120,000 shares to 11,020,000 shares. Compensation expense related to equity-based awards granted under the Incentive Plans amounted to $6.6 million and $17.4 million for the three and nine months ended September 30, 2020, respectively, and $7.3 million and $18.7 million for the three and nine months ended September 30, 2019, respectively. These amounts are included in general and administrative expenses in the accompanying condensed consolidated statements of income. As of September 30, 2020, there was $42.2 million of total unrecognized compensation cost related to non-vested share-based compensation arrangements, which is expected to be recognized over a weighted-average period of 1.8 years. We issued net shares of common stock of 68,265 and 314,204 as a result of exercised or vested equity-based awards during the three and nine months ended September 30, 2020, respectively, and 78,695 and 462,318 for the three and nine months ended September 30, 2019, respectively. These amounts are net of 31,020 and 161,469 shares withheld to satisfy employee tax obligations related to the exercises and vesting during the three and nine months ended September 30, 2020, respectively, and 146,148 and 470,232 for the three and nine months ended September 30, 2019, respectively. Delek Logistics GP, LLC 2012 Long-Term Incentive Plan

Shareholders' Equity

Shareholders' Equity	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Shareholders' Equity	Shareholders' Equity Dividends During the nine months ended September 30, 2020, our Board of Directors declared the following dividends: Approval Date Dividend Amount Per Share Record Date Payment Date February 24, 2020 $0.31 March 10, 2020 March 24, 2020 May 4, 2020 $0.31 May 20, 2020 June 3, 2020 August 3, 2020 $0.31 August 19, 2020 September 3, 2020 Stock Repurchase Program On November 6, 2018, our Board of Directors authorized a share repurchase program for up to $500.0 million of Delek common stock. Any share repurchases under the repurchase program may be implemented through open market transactions or in privately negotiated transactions, in accordance with applicable securities laws. The timing, price and size of repurchases are made at the discretion of management and will depend on prevailing market prices, general economic and market conditions and other considerations. The repurchase program does not obligate us to acquire any particular amount of stock and does not expire. During the nine months ended September 30, 2020, 58,713 shares of our common stock were repurchased for a total of $1.9 million. No repurchases of our common stock were made in the three months ended September 30, 2020. During the three and nine months ended September 30, 2019, we repurchased 1,236,854 and 4,175,576 shares of our common stock for a total of $43.0 million and $147.8 million, respectively. As of September 30, 2020, there was $229.7 million of authorization remaining under Delek's aggregate stock repurchase program. Stockholder Rights Plan On March 20, 2020, our Board of Directors declared a dividend of one preferred share purchase right (a “Right”) for each outstanding share of Delek’s common stock and adopted a stockholder rights plan (the “Rights Agreement”). The dividend was distributed in a non-cash transaction on March 30, 2020 to the stockholders of record on that date. The Rights initially trade with, and are inseparable from, Delek’s common stock. Once the Rights become exercisable, each Right will allow its holder to purchase one one-thousandth of a share of Series A Junior Participating Preferred Stock, par value $0.01 per share (a “Preferred Share”) for $92.24, subject to adjustment (the “Exercise Price”). This portion of a Preferred Share will give the stockholder approximately the same dividend, voting and liquidation rights as would one share of Delek’s common stock. Prior to exercise, the Right does not give its holder any dividend, voting or liquidation rights. The Rights will not be exercisable until 10 days after the public announcement that a person or group that has become an “Acquiring Person” (as defined in the Rights Agreement). The point at which these terms are met is otherwise referred to as the "Distribution Date." If a person or group becomes an Acquiring Person, all holders of Rights except the Acquiring Person may, for the Exercise Price, purchase shares of the Company’s common stock with a market value of two times the Exercise Price, based on the market price of the common stock prior to such acquisition. In addition, subject to certain conditions set forth in the Rights Agreement, the Board may extinguish the Rights. If the Company is later acquired in a merger or similar transaction after the Distribution Date, all holders of Rights except the Acquiring Person may, for the Exercise Price, purchase shares of the acquiring corporation with a market value of two times the Exercise Price, based on the market price of the acquiring corporation’s stock prior to such merger. In the event the Company receives a fully financed, all-cash tender offer satisfying the conditions set forth in the Rights Agreement (a “Qualifying Offer”), and certain other events occur, the Rights Agreement provides a mechanism for stockholders holding more than 20% of the shares of Delek common stock then outstanding (excluding shares beneficially owned by the person making the Qualifying Offer) to demand a special meeting of the stockholders of the Company to vote on a resolution exempting such Qualifying Offer from the provisions of the Rights Agreement. The Rights will expire on March 19, 2021, subject to a possible earlier expiration to the extent provided in the Rights Agreement. Preferred Stock On March 20, 2020, our Board of Directors authorized 1,000,000 shares of preferred stock with a par value of $0.01 per share as Series A Junior Participating Preferred Stock.

Employees

Employees	9 Months Ended
	Sep. 30, 2020
Retirement Benefits [Abstract]
Employees	Employees Postretirement BenefitsThe net periodic (benefit) cost for our postretirement benefit plans was not material for the three and nine months ended September 30, 2020 or 2019. Additionally, our estimated contributions to our pension plans during 2020 have not changed significantly from amounts previously disclosed in the notes to the consolidated financial statements for the year ended December 31, 2019.

Leases (Notes)

Leases (Notes)	9 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Leases	We lease certain retail stores, land, building and various equipment from others. Leases with an initial term of 12 months or less are not recorded on the balance sheet; we recognize lease expense for these leases on a straight-line basis over the lease term. Most leases include one or more options to renew, with renewal terms that can extend the lease term from one to 15 years or more. The exercise of existing lease renewal options is at our sole discretion. Certain leases also include options to purchase the leased property. The depreciable life of assets and leasehold improvements are limited by the expected lease term, unless there is a transfer of title or purchase option reasonably certain of exercise. Some of our lease agreements include a rate based on equipment usage and others include a rate with fixed increases or inflationary indices based increase. Our lease agreements do not contain any material residual value guarantees or material restrictive covenants. We rent or sublease certain real estate and equipment to third parties. Our sublease portfolio consists primarily of operating leases within our retail stores and crude storage equipment. As of September 30, 2020, $26.8 million of our net property, plant, and equipment balance is subject to an operating lease. This agreement does not include options for the lessee to purchase our leasing equipment, nor does it include any material residual value guarantees or material restrictive covenants. The agreement includes a one-year renewal option and certain variable payment based on usage. The following table presents additional information related to our operating leases in accordance ASC 842, Leases ("ASC 842"): Three Months Ended September 30, Nine Months Ended September 30, (in millions) 2020 2019 2020 2019 Lease Cost Operating lease costs $ 16.9 $ 13.5 $ 48.5 $ 44.1 Short-term lease costs (1) 5.4 4.0 19.1 11.3 Sublease income (1.8) (1.9) (5.7) (6.4) Net lease costs $ 20.5 $ 15.6 $ 61.9 $ 49.0 Other Information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (16.9) $ (13.5) $ (48.5) $ (44.1) Leased assets obtained in exchange for new operating lease liabilities $ 8.5 $ 1.5 $ 30.7 $ 9.6 September 30, 2020 Weighted-average remaining lease term (years) operating leases 6.1 Weighted-average discount rate operating leases (2) 5.9 % (1) Includes an immaterial amount of variable lease cost. (2) Our discount rate is primarily based on our incremental borrowing rate in accordance with ASC 842.

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2020
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Dividend Suspension We have elected to suspend dividends beginning in the fourth quarter of 2020 in order to conserve capital. Supply and Offtake Agreements Pursuant to the Supply and Offtake Agreements' Periodic Price Adjustment provision, we determined that the provision was triggered on October 1, 2020 and a paydown amounting to $20.8 million was made to J. Aron on October 30, 2020. The prospective pricing underlying the fixed component of the Baseline Step-Out liabilities will be adjusted accordingly to reflect this payment, resulting in a reduction to the fixed differential component of our long-term Supply and Offtake Obligation totaling $20.8 million and a prospective contractual reset of the fixed differentials subject to future Periodic Price Adjustments. Contemporaneous with the payment, J. Aron separately refunded to us the $10.0 million of deferred additional monthly fees.

Organization and Basis of Pre_2

Organization and Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Accounting	Our condensed consolidated financial statements include the accounts of Delek and its subsidiaries. Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with U.S. Generally Accepted Accounting Principles ("GAAP") have been condensed or omitted, although management believes that the disclosures herein are adequate to make the financial information presented not misleading. Our unaudited condensed consolidated financial statements have been prepared in conformity with GAAP applied on a consistent basis with those of the annual audited consolidated financial statements included in our Annual Report on Form 10-K filed with the Securities and Exchange Commission ("SEC") on February 28, 2020 (the "Annual Report on Form 10-K") and in accordance with the rules and regulations of the SEC. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto for the year ended December 31, 2019 included in our Annual Report on Form 10-K.
Consolidation of Variable Interest Entity	Our condensed consolidated financial statements include Delek Logistics Partners, LP ("Delek Logistics"), which is a variable interest entity. As the indirect owner of the general partner of Delek Logistics, we have the ability to direct the activities of this entity that most significantly impact its economic performance. We are also considered to be the primary beneficiary for accounting purposes for this entity and are Delek Logistics' primary customer. As Delek Logistics does not derive an amount of gross margin material to us from third parties, there is limited risk to Delek associated with Delek Logistics' operations. However, in the event that Delek Logistics incurs a loss, our operating results will reflect such loss, net of intercompany eliminations, to the extent of our ownership interest in this entity.
Consolidation	In the opinion of management, all adjustments necessary for a fair presentation of the financial condition and the results of operations for the interim periods have been included. All significant intercompany transactions and account balances have been eliminated in consolidation. All adjustments are of a normal, recurring nature. Operating results for the interim period should not be viewed as representative of results that may be expected for any future interim period or for the full year.
Reclassifications	Certain prior period amounts have been reclassified in order to conform to the current period presentation.
New Accounting Pronouncements	New Accounting Pronouncements Adopted During 2020 ASU 2018-15, Intangible - Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract In August 2018, the Financial Accounting Standards Board (the "FASB") issued guidance related to customers’ accounting for implementation costs incurred in a cloud computing arrangement that is considered a service contract. This pronouncement aligns the requirements for capitalizing implementation costs in such arrangements with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. This pronouncement is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2019. We adopted this guidance on January 1, 2020 and the adoption did not have a material impact on our business, financial condition or results of operations. ASU 2018-13, Fair Value Measurement - Changes to the Disclosure Requirements for Fair Value Measurement In August 2018, the FASB issued guidance related to disclosure requirements for fair value measurements. The pronouncement eliminates, modifies and adds disclosure requirements for fair value measurements. The pronouncement is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2019, with early adoption permitted. We adopted this guidance on January 1, 2020 and the adoption did not have a material impact on our business, financial condition or results of operations. See Note 10. ASU 2016-13, Financial Instruments - Measurement of Credit Losses on Financial Instruments In June 2016, the FASB issued guidance requiring the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Organizations will now use forward-looking information to better inform their credit loss estimates. This guidance is effective for interim and annual periods beginning after December 15, 2019. We adopted this guidance on January 1, 2020 using the modified retrospective approach as of the adoption date. The adoption did not have a material impact on the Company’s operating results, financial position or disclosures. Accounting Pronouncements Not Yet Adopted ASU 2020-06, Debt— Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity In August 2020, the FASB issued ASU 2020-06, which is intended to simplify the accounting for certain financial instruments with characteristics of liabilities and equity, including convertible instruments and contracts in an entity's own equity. The guidance allows for either full retrospective adoption or modified retrospective adoption. The pronouncement is effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2021, and early adoption is permitted. The Company is evaluating the impact of this guidance but does not currently expect adopting this new guidance will have a material impact on its consolidated financial statements and related disclosures. ASU 2020-04, Facilitation of the Effects of Reference Rate Reform on Financial Reporting (Topic 848) In March 2020, the FASB issued an amendment which is intended to provide temporary optional expedients and exceptions to GAAP guidance on contracts, hedge accounting and other transactions affected by the expected market transition from the London Interbank Offered Rate ("LIBOR") and other interbank rates. This guidance is effective for all entities at any time beginning on March 12, 2020 through December 31, 2022 and may be applied from the beginning of an interim period that includes the issuance date of the ASU. The Company is currently evaluating the impact this guidance may have on its consolidated financial statements and related disclosures. ASU 2020-01, Investments—Equity Securities (Topic 321), Investments—Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815)—Clarifying the Interactions between Topic 321, Topic 323, and Topic 815 In January 2020, the FASB issued ASU 2020-01 which is intended to clarify interactions between the guidance to account for certain equity securities under Topics 321, 323 and 815, and improve current GAAP by reducing diversity in practice and increasing comparability of accounting. The pronouncement is effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2020, and early adoption is permitted. The Company is currently evaluating the impact this guidance may have on its consolidated financial statements and related disclosures. ASU 2019-12, Simplifying the Accounting for Income Taxes In December 2019, the FASB issued guidance intended to simplify various aspects related to accounting for income taxes, eliminate certain exceptions within ASC 740 and clarify certain aspects of the current guidance to promote consistency among reporting entities. The pronouncement is effective for fiscal years and for interim periods within those fiscal years beginning after December 15, 2020, with early adoption permitted. We expect to adopt this guidance on the effective date and are currently evaluating the impact that adopting this new guidance will have on our business, financial condition and results of operations. ASU 2018-14, Compensation - Changes to the Disclosure Requirements for Defined Benefit Plans In August 2018, the FASB issued guidance related to disclosure requirements for defined benefit plans. The pronouncement eliminates, modifies and adds disclosure requirements for defined benefit plans. The pronouncement is effective for fiscal years beginning after December 15, 2020, and early adoption is permitted. We expect to adopt this guidance on the effective date and do not expect adopting this new guidance will have a material impact on our business, financial condition or results of operations.

Segment Data Segment Data (Poli

Segment Data Segment Data (Policies)	9 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Segment Reporting, Policy	We aggregate our operating units into three reportable segments: Refining, Logistics, and Retail. Operations that are not specifically included in the reportable segments are included in Corporate, Other and Eliminations, which consist of the following: • our corporate activities; • results of certain immaterial operating segments, including our Canadian crude trading operations (as discussed in Note 9); • wholesale crude operations; • Alon's asphalt terminal operations; and • intercompany eliminations. Decisions concerning the allocation of resources and assessment of operating performance are made based on this segmentation. Management measures the operating performance of each of the reportable segments based on the segment contribution margin. Segment contribution margin is defined as net revenues less cost of materials and other and operating expenses, excluding depreciation and amortization. During the first quarter of 2020, we revised the structure of the internal financial information reviewed by management and began allocating the results of hedging activity associated with managing risks of our refineries, previously reported in corporate, other and
Property, Plant and Equipment, Policy	n accordance with ASC 360, Property, Plant and Equipment ("ASC 360"), Delek evaluates the realizability of property, plant and equipment as events occur that might indicate potential impairment. T

Inventory Inventory (Policies)

Inventory Inventory (Policies)	9 Months Ended
	Sep. 30, 2020
Inventory Disclosure [Abstract]
Inventory, Policy [Policy Text Block]	Crude oil, work in process, refined products, blendstocks and asphalt inventory for all of our operations, excluding the Tyler refinery and merchandise inventory in our retail segment, are stated at the lower of cost determined using FIFO basis or net realizable value. Cost of all inventory at the Tyler refinery is determined using the LIFO inventory valuation method and inventory is stated at the lower of cost or market.  Retail merchandise inventory consists of cigarettes, beer, convenience merchandise and food service merchandise and is stated at estimated cost as determined by the retail inventory method.

Fair Value Measurements Fair Va

Fair Value Measurements Fair Value Measurements (Policies)	9 Months Ended
	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments, Policy [Policy Text Block]	Delek applies the provisions of ASC 820, Fair Value Measurements ("ASC 820"), which defines fair value, establishes a framework for its measurement and expands disclosures about fair value measurements. ASC 820 requires disclosures that categorize assets and liabilities measured at fair value into one of three different levels depending on the observability of the inputs employed in the measurement. Level 1 inputs are quoted prices in active markets for identical assets or liabilities. Level 2 inputs are observable inputs other than quoted prices included within Level 1 for the asset or liability, either directly or indirectly through market-corroborated inputs. Level 3 inputs are unobservable inputs for the asset or liability reflecting our assumptions about pricing by market participants.

Segment Data (Tables)

Segment Data (Tables)	9 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Schedule of Business Segment Operating Performance	Nine Months Ended September 30, 2020 (In millions) Refining Logistics Retail Corporate, Consolidated Net revenues (excluding inter-segment fees and revenues) $ 4,021.9 $ 133.4 $ 521.7 $ 742.6 $ 5,419.6 Inter-segment fees and revenues 346.5 289.9 — (636.4) — Operating costs and expenses: Cost of materials and other 4,314.4 205.9 400.0 144.0 5,064.3 Operating expenses (excluding depreciation and amortization presented below) 302.5 41.5 66.8 11.2 422.0 Segment contribution margin $ (248.5) $ 175.9 $ 54.9 $ (49.0) (66.7) Depreciation and amortization $ 132.3 $ 24.4 $ 9.1 $ 11.6 177.4 General and administrative expenses 184.4 Other operating income, net (14.6) Operating loss $ (413.9) Capital spending (excluding business combinations) $ 180.9 $ 6.9 $ 8.2 $ 12.0 $ 208.0 Nine Months Ended September 30, 2019 Refining (1) Logistics Retail Corporate, (1) Consolidated Net revenues (excluding inter-segment fees and revenues) $ 6,096.7 $ 254.3 $ 640.2 $ 23.3 $ 7,014.5 Inter-segment fees and revenues 539.9 191.1 — (731.0) — Operating costs and expenses: Cost of materials and other 5,629.8 262.7 521.9 (683.2) 5,731.2 Operating expenses (excluding depreciation and amortization presented below) 356.7 51.8 71.9 15.5 495.9 Segment contribution margin $ 650.1 $ 130.9 $ 46.4 $ (40.0) 787.4 Depreciation and amortization $ 98.9 $ 19.8 $ 11.5 $ 16.5 146.7 General and administrative expenses 197.3 Other operating income, net (0.7) Operating income $ 444.1 Capital spending (excluding business combinations) $ 193.8 $ 6.2 $ 14.3 $ 110.5 $ 324.8 (1) The refining segment results of operations for the three and nine months ended September 30, 2019, includes hedging gains, a component of cost of materials and other, of $22.6 million and $50.0 million, respectively, which was previously included and reported in corporate, other and eliminations. Other Segment Information Total assets by segment were as follows as of September 30, 2020: Refining Logistics Retail Corporate, Consolidated Total assets $ 6,103.2 $ 957.7 $ 299.1 $ (835.0) $ 6,525.0 Less: Inter-segment notes receivable (1,326.3) — — 1,326.3 — Inter-segment right of use lease assets (393.8) — — 393.8 — Total assets, excluding inter-segment notes receivable and right of use assets $ 4,383.1 $ 957.7 $ 299.1 $ 885.1 $ 6,525.0 Property, plant and equipment and accumulated depreciation as of September 30, 2020 and depreciation expense by reporting segment for the three and nine months ended September 30, 2020 are as follows (in millions): Refining Logistics Retail Corporate, Consolidated Property, plant and equipment $ 2,558.2 $ 684.2 $ 164.8 $ 108.5 $ 3,515.7 Less: Accumulated depreciation (758.9) (216.7) (45.4) (70.8) (1,091.8) Property, plant and equipment, net $ 1,799.3 $ 467.5 $ 119.4 $ 37.7 $ 2,423.9 Depreciation expense for the three months ended September 30, 2020 $ 48.5 $ 9.5 $ 2.7 $ 2.6 $ 63.3 Depreciation expense for the nine months ended September 30, 2020 $ 127.3 $ 24.4 $ 8.5 $ 11.6 $ 171.8

Earnings (Loss) Per Share (Tabl

Earnings (Loss) Per Share (Tables)	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Schedule of Common Shares Used to Compute Delek's Basic and Diluted Earnings (Loss) Per Share	The following table sets forth the computation of basic and diluted earnings per share. Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 Numerator: Numerator for EPS (Loss) income from continuing operations, net of tax $ (76.9) $ 60.0 $ (285.4) $ 299.0 Less: Income from continuing operations attributed to non-controlling interest 11.2 8.7 29.4 20.3 (Loss) Income from continuing operations attributable to Delek $ (88.1) $ 51.3 $ (314.8) $ 278.7 Numerator for EPS - discontinued operations Loss from discontinued operations attributable to Delek $ — $ — $ — $ (0.8) Denominator: Weighted average common shares outstanding (denominator for basic EPS) 73,669,310 75,028,562 73,551,970 76,463,435 Dilutive effect of stock-based awards — 673,749 — 704,399 Weighted average common shares outstanding, assuming dilution (denominator for diluted EPS) 73,669,310 75,702,311 73,551,970 77,167,834 EPS: Basic (loss) income per share: (Loss) Income from continuing operations $ (1.20) $ 0.68 $ (4.28) $ 3.64 Loss from discontinued operations — — $ — (0.01) Basic (loss) income per share $ (1.20) $ 0.68 $ (4.28) $ 3.63 Diluted (loss) income per share: (Loss) Income from continuing operations $ (1.20) $ 0.68 $ (4.28) $ 3.61 Loss from discontinued operations $ — — $ — (0.01) Diluted (loss) income per share $ (1.20) $ 0.68 $ (4.28) $ 3.60 The following equity instruments were excluded from the diluted weighted average common shares outstanding because their effect would be antidilutive: Antidilutive stock-based compensation (because average share price is less than exercise price) 3,873,055 1,846,919 3,807,699 2,003,283 Antidilutive due to loss 363,603 — 330,412 — Total antidilutive stock-based compensation 4,236,658 1,846,919 4,138,111 2,003,283

Delek Logistics (Tables)

Delek Logistics (Tables)	9 Months Ended
	Sep. 30, 2020
Variable Interest Entity [Abstract]
Subsidiary balance sheet	Delek Logistics is a variable interest entity, as defined under GAAP, and is consolidated into our condensed consolidated financial statements, representing our logistics segment. The assets of Delek Logistics can only be used to settle its own obligations and its creditors have no recourse to our assets. Exclusive of intercompany balances and the marketing agreement intangible asset between Delek Logistics and Delek which are eliminated in consolidation, the Delek Logistics condensed consolidated balance sheets as presented below are included in the condensed consolidated balance sheets of Delek (unaudited, in millions). September 30, 2020 December 31, 2019 ASSETS Cash and cash equivalents $ 6.0 $ 5.5 Accounts receivable 17.5 13.2 Accounts receivable from related parties 9.9 — Inventory 1.7 12.6 Other current assets 0.4 2.3 Property, plant and equipment, net 467.5 295.0 Equity method investments 255.4 247.0 Operating lease right-of-use assets 18.1 3.7 Goodwill 12.2 12.2 Intangible assets, net 161.8 146.6 Other non-current assets 7.0 6.3 Total assets $ 957.5 $ 744.4 LIABILITIES AND DEFICIT Accounts payable $ 4.7 $ 12.5 Accounts payable to related parties — 8.9 Current portion of operating lease liabilities 5.5 1.4 Accrued expenses and other current liabilities 13.8 12.2 Long-term debt 1,006.1 833.1 Asset retirement obligations 5.9 5.6 Deferred tax liabilities 1.2 0.2 Operating lease liabilities, net of current portion 12.6 2.3 Other non-current liabilities 19.2 19.3 Deficit (111.5) (151.1) Total liabilities and deficit $ 957.5 $ 744.4

Inventory (Tables)

Inventory (Tables)	9 Months Ended
	Sep. 30, 2020
Inventory Disclosure [Abstract]
Schedule of Inventories	Carrying value of inventories consisted of the following (in millions): September 30, 2020 December 31, 2019 Refinery raw materials and supplies $ 261.4 $ 400.4 Refinery work in process 82.9 109.1 Refinery finished goods 299.1 397.5 Retail fuel 5.9 7.3 Retail merchandise 21.0 19.8 Logistics refined products 1.7 12.6 Total inventories $ 672.0 $ 946.7

Crude Oil Supply and Inventor_2

Crude Oil Supply and Inventory Purchase Agreement (Tables)	9 Months Ended
	Sep. 30, 2020
Other Liabilities Disclosure [Abstract]
Barrels Subject To Agreement	Barrels subject to the Supply and Offtake Agreements are as follows: (in millions) El Dorado Big Spring Krotz Springs Baseline Volumes pursuant to the respective Supply and Offtake Agreements 2.0 0.8 1.3 Barrels of inventory consigned under the respective Supply and Offtake Agreements as of September 30, 2020 (1) 3.8 1.3 1.4 Barrels of inventory consigned under the respective Supply and Offtake Agreements as of December 31, 2019 (1) 3.5 2.0 1.7 (1) Includes Baseline Volumes plus/minus over/short quantities.
Disclosure Of Product Financing Arrangements, Payables And Receivables	Net balances payable (receivable) under the Supply and Offtake Agreements were as follows as of the balance sheet dates: (in millions) El Dorado Big Spring Krotz Springs Total Balances as of September 30, 2020: Baseline Step-Out Liability $ 100.5 $ 49.1 $ 70.8 $ 220.4 Revolving over/short inventory financing liability 80.6 19.7 2.5 102.8 Total Obligations Under Supply and Offtake Agreements 181.1 68.8 73.3 323.2 Less: Current portion 80.6 19.7 2.5 102.8 Obligations Under Supply and Offtake Agreements - Noncurrent portion $ 100.5 $ 49.1 $ 70.8 $ 220.4 Other current payable for monthly activity true-up $ 12.6 $ 1.0 $ — $ 13.6 (in millions) El Dorado Big Spring Krotz Springs Total Balances as of December 31, 2019: Baseline Step-Out Liability $ 125.5 $ 57.2 $ 87.6 $ 270.3 Revolving over/short inventory financing liability 93.0 73.5 40.5 207.0 Total Obligations Under Supply and Offtake Agreements 218.5 130.7 128.1 477.3 Less: Current portion 218.5 73.5 40.5 332.5 Obligations Under Supply and Offtake Agreements - Noncurrent portion $ — $ 57.2 $ 87.6 $ 144.8 Other current receivable for monthly activity true-up $ (16.4) $ (3.1) $ (3.5) $ (23.0)
Schedule Of Recurring Cash Fees And Interest Expense	The Supply and Offtake Agreements require payments of fixed annual fees which are factored into the interest rate yield under the fair value accounting model. Recurring cash fees paid during the periods presented were as follows: (in millions) El Dorado Big Spring Krotz Springs Total Recurring cash fees paid during the three months ended September 30, 2020 $ 1.5 $ 0.7 $ 1.1 $ 3.3 Recurring cash fees paid during the three months ended September 30, 2019 $ 2.9 $ 1.5 $ 2.5 $ 6.9 Recurring cash fees paid during the nine months ended September 30, 2020 $ 7.4 $ 2.8 $ 3.1 $ 13.3 Recurring cash fees paid during the nine months ended September 30, 2019 $ 8.5 $ 4.4 $ 7.6 $ 20.5 Interest expense recognized under the Supply and Offtake Agreements includes the yield attributable to recurring cash fees, one-time cash fees (e.g., in connection with amendments), as well as other changes in fair value, which may increase or decrease interest expense. Total interest expense incurred during the periods presented was as follows: (in millions) El Dorado Big Spring Krotz Springs Total Interest expense for the three months ended September 30, 2020 $ 1.5 $ 0.7 $ 1.1 $ 3.3 Interest expense for the three months ended September 30, 2019 $ 3.7 $ 2.0 $ 2.7 $ 8.4 Interest expense for the nine months ended September 30, 2020 $ 7.8 $ 5.9 $ 3.5 $ 17.2 Interest expense for the nine months ended September 30, 2019 $ 10.9 $ 3.6 $ 8.8 $ 23.3
Disclosure of Letters of Credit	We maintained letters of credit under the Supply and Offtake Agreements as follows: (in millions) El Dorado Big Spring and Krotz Springs Letters of credit outstanding as of September 30, 2020 $ 170.0 $ 10.0 Letters of credit outstanding as of December 31, 2019 $ 180.0 $ 44.0

Long-Term Obligations and Not_2

Long-Term Obligations and Notes Payable (Tables)	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Schedule of Outstanding Borrowings	Outstanding borrowings, net of unamortized debt discounts and certain deferred financing costs, under Delek’s existing debt instruments are as follows (in millions): September 30, 2020 December 31, 2019 Revolving Credit Facility $ 110.0 $ 30.0 Term Loan Credit Facility (1) 1,248.6 1,069.5 Delek Logistics Credit Facility 760.7 588.4 Hapoalim Term Loan (2) 39.3 39.5 Delek Logistics Notes (3) 245.4 244.7 Reliant Bank Revolver 50.0 50.0 Promissory Notes 20.0 45.0 2,474.0 2,067.1 Less: Current portion of long-term debt and notes payable 33.4 36.4 $ 2,440.6 $ 2,030.7 (1) Net of deferred financing costs of $3.0 million and $3.5 million and debt discount of $24.7 million and $12.5 million at September 30, 2020 and December 31, 2019, respectively. (2) Net of deferred financing costs of $0.2 million and $0.3 million and debt discount of $0.2 million and $0.2 million at September 30, 2020 and December 31, 2019, respectively.

Derivative Instruments (Tables)

Derivative Instruments (Tables)	9 Months Ended
	Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Fair Value of Derivatives Instruments Statements	The following table presents the fair value of our derivative instruments as of September 30, 2020 and December 31, 2019. The fair value amounts below are presented on a gross basis and do not reflect the netting of asset and liability positions permitted under our master netting arrangements, including cash collateral on deposit with our counterparties. We have elected to offset the recognized fair value amounts for multiple derivative instruments executed with the same counterparty in our financial statements. As a result, the asset and liability amounts below differ from the amounts presented in our condensed consolidated balance sheets. See Note 10 for further information regarding the fair value of derivative instruments (in millions). September 30, 2020 December 31, 2019 Derivative Type Balance Sheet Location Assets Liabilities Assets Liabilities Derivatives not designated as hedging instruments: Commodity derivatives (1) Other current assets $ 90.9 $ (71.3) $ 188.9 $ (202.1) Commodity derivatives (1) Other current liabilities 881.2 (896.2) 24.4 (34.0) Commodity derivatives (1) Other long-term assets 0.1 — — — Commodity derivatives (1) Other long-term liabilities 374.9 (376.7) 23.4 (24.8) RIN commitment contracts (2) Other current assets 2.9 — 0.6 — RIN commitment contracts (2) Other current liabilities — (1.1) — (1.9) Derivatives designated as hedging instruments: Commodity derivatives (1) Other current assets 2.7 (1.5) 3.4 (2.0) Commodity derivatives (1) Other long-term assets — — 0.2 (0.1) Total gross fair value of derivatives $ 1,352.7 $ (1,346.8) $ 240.9 $ (264.9) Less: Counterparty netting and cash collateral (3) 1,319.6 (1,328.7) 210.7 (249.5) Total net fair value of derivatives $ 33.1 $ (18.1) $ 30.2 $ (15.4) (1) As of September 30, 2020 and December 31, 2019, we had open derivative positions representing 193,693,716 and 86,484,065 barrels, respectively, of crude oil and refined petroleum products. Of these open positions, contracts representing 90,000 and 600,000 barrels were designated as cash flow hedging instruments as of September 30, 2020 and December 31, 2019, respectively. Additionally, as of September 30, 2020 and December 31, 2019, we had open derivative positions representing 13,180,000 and 40,050,000 One Million British Thermal Units ("MMBTU") of natural gas products, respectively. (2) As of September 30, 2020 and December 31, 2019, we had open RIN commitment contracts representing 59,200,000 and 147,000,000 RINs, respectively. (3) As of September 30, 2020 and December 31, 2019, $9.1 million and $38.8 million, respectively, of cash collateral held by counterparties has been netted with the derivatives with each counterparty. Total gains on our hedging derivatives and RIN commitment contracts recorded in the condensed consolidated statements of income are as follows (in millions): Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Gains (losses) on commodity derivatives not designated as hedging instruments recognized in cost of materials and other (1) $ 5.1 $ 34.2 $ (85.8) $ 118.5 Gains (losses) on commodity derivatives not designated as hedging instruments recognized in other operating income, net (1) (2) 0.1 (0.3) 7.9 0.2 Realized gains (losses) reclassified out of accumulated other comprehensive income and into cost of materials and other on commodity derivatives designated as cash flow hedging instruments 0.8 (21.1) 3.7 (55.0) Total gains (losses) $ 6.0 $ 12.8 $ (74.2) $ 63.7 (1) Gains (losses) on commodity derivatives that are economic hedges but not designated as hedging instruments include unrealized (losses) gains of $(19.4) million and $9.2 million for the three and nine months ended September 30, 2020, respectively, and $0.5 million and $(30.1) million for the three and nine months ended September 30, 2019, respectively. Of these amounts, approximately $0.4 million and $(13.0) million as of September 30, 2020 and September 30, 2019, respectively, represent unrealized gains (losses) where the instrument has matured but where it has not cash settled as of period end. Derivative instruments that have matured but not cash settled at the balance sheet date continue to be reflected in derivative assets or liabilities on our balance sheet. (2) See separate table below for disclosures about "trading derivatives." The effect of cash flow hedge accounting on the condensed consolidated statements of income is as follows (in millions): Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Gain (loss) on cash flow hedging relationships recognized in cost of materials and other: Commodity contracts: Hedged items $ (0.8) $ 21.1 $ (3.7) $ 55.0 Derivative designated as hedging instruments 0.8 (21.1) 3.7 (55.0) Total $ — $ — $ — $ — Total (losses) gains on our trading physical forward contract derivatives (none of which were designated as hedging instruments) recorded in other operating loss (income), net on the condensed consolidated statements of income are as follows (in millions): Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Realized (losses) gains $ (0.4) $ (1.4) $ (3.4) $ 3.3 Unrealized (losses) gains 0.2 4.5 (0.5) 6.6 Total $ (0.2) $ 3.1 $ (3.9) $ 9.9

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Schedule of the Fair Value of Assets and Liabilities	The fair value hierarchy for our financial assets and liabilities accounted for at fair value on a recurring basis was as follows (in millions): September 30, 2020 Level 1 Level 2 Level 3 Total Assets Commodity derivatives $ — $ 1,349.8 $ — $ 1,349.8 Commodity investments 1.0 — — 1.0 Right to receive crude oil barrels — 36.6 — 36.6 RIN commitment contracts — 2.9 — 2.9 Total assets 1.0 1,389.3 — 1,390.3 Liabilities Commodity derivatives — (1,345.7) — (1,345.7) RIN commitment contracts — (1.1) — (1.1) Environmental credits obligation deficit — (233.6) — (233.6) J. Aron supply and offtake obligations — (323.2) — (323.2) Total liabilities — (1,903.6) — (1,903.6) Net assets (liabilities) $ 1.0 $ (514.3) $ — $ (513.3) December 31, 2019 Level 1 Level 2 Level 3 Total Assets Commodity derivatives $ — $ 240.3 $ — $ 240.3 Investment commodities 12.1 — — 12.1 RIN commitment contracts — 0.6 — 0.6 Environmental credits obligation surplus — 16.8 — 16.8 Total assets 12.1 257.7 — 269.8 Liabilities Commodity derivatives — (263.0) — (263.0) RIN commitment contracts — (1.9) — (1.9) Environmental credits obligation deficit — (18.5) — (18.5) J. Aron supply and offtake obligations — (477.3) — (477.3) Total liabilities — (760.7) — (760.7) Net assets (liabilities) $ 12.1 $ (503.0) $ — $ (490.9)

Related Party Transactions (Tab

Related Party Transactions (Tables)	9 Months Ended
	Sep. 30, 2020
Related Party Transactions [Abstract]
Schedule of Related Party Transactions	Our related party transactions consist primarily of transactions with our equity method investees (See Note 5). Transactions with our related parties were as follows for the periods presented: Three Months Ended September 30, Nine Months Ended September 30, (in millions) 2020 2019 2020 2019 Revenues (1) $ 27.6 $ 45.1 $ 57.5 $ 73.3 Cost of materials and other (2) $ 10.9 $ 20.3 $ 31.4 $ 33.7 (1) Consists primarily of asphalt sales which are recorded in corporate, other and eliminations segment. (2) Consists primarily of pipeline throughput fees paid by the refining segment and asphalt purchases.

Other Assets and Liabilities (T

Other Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2020
Other Assets and Liabilities [Abstract]
Schedule of Other Current Assets	The detail of other current assets is as follows (in millions): Other Current Assets September 30, 2020 December 31, 2019 RINs assets $ 231.1 $ 14.5 Income and other tax receivables 181.1 61.9 Right to receive crude oil barrels (see Note 10) 36.6 — Short-term derivative assets (see Note 9) 33.0 30.2 Prepaid expenses 19.2 21.9 Environmental Credits Obligation surplus (see Note 10) 7.3 16.8 Biodiesel tax credit (see Note 2) 3.2 97.5 Investment commodities 1.0 12.1 Other 3.4 13.8 Total $ 515.9 $ 268.7
Schedule of Other Non-current Assets	The detail of other non-current assets is as follows (in millions): Other Non-Current Assets September 30, 2020 December 31, 2019 Supply and Offtake receivable $ 32.7 $ 32.7 Other equity Investments 10.4 8.9 Deferred financing costs 7.3 8.5 Other 18.1 17.7 Total $ 68.5 $ 67.8
Schedule of Accrued Expenses Other Current Liabilities	The detail of accrued expenses and other current liabilities is as follows (in millions): Accrued Expenses and Other Current Liabilities September 30, 2020 December 31, 2019 Environmental Credits Obligation deficit (see Note 10) $ 237.6 $ 18.5 Product financing agreements 168.5 21.1 Income and other taxes payable 88.3 119.6 Crude purchase liabilities 74.3 72.1 Employee costs 23.8 47.6 Short-term derivative liabilities (see Note 9) 16.3 14.1 Interest payable 9.6 8.8 Environmental liabilities (see Note 11) 6.6 8.2 Accrued utilities 3.7 4.4 Tank inspection liabilities 3.1 5.6 Other 25.3 26.8 Total $ 657.1 $ 346.8
Other Non-current Liabilities	The detail of other non-current liabilities is as follows (in millions): Other Non-Current Liabilities September 30, 2020 December 31, 2019 Liability for unrecognized tax benefits $ 15.2 $ 12.1 Tank inspection liabilities 9.4 9.9 Pension and other postemployment benefit liabilities, net 3.1 5.3 Long-term derivative liabilities (see Note 9) 1.8 1.4 Deferred payroll taxes 7.8 — Other 0.1 2.2 Total $ 37.4 $ 30.9

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Schedule of Dividends	During the nine months ended September 30, 2020, our Board of Directors declared the following dividends: Approval Date Dividend Amount Per Share Record Date Payment Date February 24, 2020 $0.31 March 10, 2020 March 24, 2020 May 4, 2020 $0.31 May 20, 2020 June 3, 2020 August 3, 2020 $0.31 August 19, 2020 September 3, 2020

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Lease, Cost	Three Months Ended September 30, Nine Months Ended September 30, (in millions) 2020 2019 2020 2019 Lease Cost Operating lease costs $ 16.9 $ 13.5 $ 48.5 $ 44.1 Short-term lease costs (1) 5.4 4.0 19.1 11.3 Sublease income (1.8) (1.9) (5.7) (6.4) Net lease costs $ 20.5 $ 15.6 $ 61.9 $ 49.0 Other Information Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (16.9) $ (13.5) $ (48.5) $ (44.1) Leased assets obtained in exchange for new operating lease liabilities $ 8.5 $ 1.5 $ 30.7 $ 9.6 September 30, 2020 Weighted-average remaining lease term (years) operating leases 6.1 Weighted-average discount rate operating leases (2) 5.9 % (1) Includes an immaterial amount of variable lease cost. (2) Our discount rate is primarily based on our incremental borrowing rate in accordance with ASC 842.

Segment Data - Narrative (Detai

Segment Data - Narrative (Details) $ in Millions	May 07, 2020USD ($)	Sep. 30, 2020bbl / dfacilitystore
Segment Reporting Information [Line Items]
Number of stores | store		253
Refining
Segment Reporting Information [Line Items]
Refinery throughput capacity (in bpd)		302,000
Number Of Biodiesel Facilities | facility		3
Big Spring refinery | Refining
Segment Reporting Information [Line Items]
Refinery throughput capacity (in bpd)		73,000
El Dorado Refinery | Refining
Segment Reporting Information [Line Items]
Refinery throughput capacity (in bpd)		80,000
Tyler Refinery | Refining
Segment Reporting Information [Line Items]
Refinery throughput capacity (in bpd)		75,000
Krotz Spring Refinery | Refining
Segment Reporting Information [Line Items]
Refinery throughput capacity (in bpd)		74,000
Alon Bakersfield Property, Inc. [Member]
Segment Reporting Information [Line Items]
Disposal Group, Including Discontinued Operations, Call Option, Interest Percent	33.33%
Disposal Group, Including Discontinued Operation, Consideration | $	$ 40
Gain (Loss) on Disposition of Business | $	$ (56.8)

Segment Data - Operating Perfor

Segment Data - Operating Performance (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net revenues (excluding inter-segment fees and sales)	$ (2,062.9)	$ (2,334.3)	$ (5,419.6)	$ (7,014.5)
Operating costs and expenses:
Cost of materials and other	1,875.9	1,964.1	5,064.3	5,731.2
Operating expenses (excluding depreciation and amortization presented below)	139.7	166.9	422	495.9
Segment contribution margin	47.3	203.3	(66.7)	787.4
Depreciation and amortization	65.2	49.8	177.4	146.7
General and administrative expenses	57	65.6	184.4	197.3
Other operating loss (income), net	0.3	0.5	(14.6)	(0.7)
Operating (loss) income	(75.2)	87.4	(413.9)	444.1
Capital spending (excluding business combinations)	4.7	110.5	208	324.8
Total assets	6,525		6,525		$ 7,016.3
Refining
Segment Reporting Information [Line Items]
Net revenues (excluding inter-segment fees and sales)	(1,450.8)	(2,036.9)	(4,021.9)	(6,096.7)
Logistics
Segment Reporting Information [Line Items]
Net revenues (excluding inter-segment fees and sales)	(49.4)	(71.4)	(133.4)	(254.3)
Retail
Segment Reporting Information [Line Items]
Net revenues (excluding inter-segment fees and sales)	(177.7)	(218.5)	(521.7)	(640.2)
Operating Segments | Refining
Operating costs and expenses:
Operating expenses (excluding depreciation and amortization presented below)	102.1	120.7	302.5	356.7
Segment contribution margin	(17.8)	150.1	(248.5)	650.1
Depreciation and amortization	50.3	34.6	132.3	98.9
Capital spending (excluding business combinations)	0.6	63.3	180.9	193.8
Total assets	6,103.2		6,103.2
Operating Segments | Logistics
Operating costs and expenses:
Operating expenses (excluding depreciation and amortization presented below)	14.3	18.4	41.5	51.8
Segment contribution margin	67.2	46.6	175.9	130.9
Depreciation and amortization	9.4	6.6	24.4	19.8
Capital spending (excluding business combinations)	3.2	4	6.9	6.2
Total assets	957.7		957.7
Operating Segments | Retail
Operating costs and expenses:
Operating expenses (excluding depreciation and amortization presented below)	23.1	23.5	66.8	71.9
Segment contribution margin	18.3	18.6	54.9	46.4
Depreciation and amortization	2.9	3	9.1	11.5
Capital spending (excluding business combinations)	0.7	3.8	8.2	14.3
Total assets	299.1		299.1
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Net revenues (excluding inter-segment fees and sales)	(385)	(7.5)	(742.6)	(23.3)
Operating costs and expenses:
Operating expenses (excluding depreciation and amortization presented below)	0.2	4.3	11.2	15.5
Depreciation and amortization	2.6	5.6	11.6	16.5
Capital spending (excluding business combinations)	0.2	39.4	12	110.5
Corporate, Other and Eliminations
Operating costs and expenses:
Segment contribution margin	(20.4)	(12)	(49)	(40)
Total assets	(835)		(835)
Intersegment Eliminations
Segment Reporting Information [Line Items]
Net revenues (excluding inter-segment fees and sales)	205.5	206.1	636.4	731
Intersegment Eliminations | Refining
Segment Reporting Information [Line Items]
Net revenues (excluding inter-segment fees and sales)	112.7	139.9	346.5	539.9
Intersegment Eliminations | Logistics
Segment Reporting Information [Line Items]
Net revenues (excluding inter-segment fees and sales)	92.8	66.2	289.9	191.1
Intersegment Eliminations | Retail
Segment Reporting Information [Line Items]
Net revenues (excluding inter-segment fees and sales)	0	0	0	0
Product
Operating costs and expenses:
Cost of materials and other	1,875.9	1,964.1	5,064.3	5,731.2
Product | Operating Segments | Refining
Operating costs and expenses:
Cost of materials and other	1,479.2	1,906	4,314.4	5,629.8
Product | Operating Segments | Logistics
Operating costs and expenses:
Cost of materials and other	60.7	72.6	205.9	262.7
Product | Operating Segments | Retail
Operating costs and expenses:
Cost of materials and other	136.3	176.4	400	521.9
Product | Corporate, Non-Segment [Member]
Operating costs and expenses:
Cost of materials and other	199.7	(190.9)	144	(683.2)
Commodity Contract [Member]
Operating costs and expenses:
Net gains related to cash flow hedges	$ (0.6)	(19.8)	$ (0.3)	(23.2)
Commodity Contract [Member] | Refining
Operating costs and expenses:
Net gains related to cash flow hedges		$ 22.6		$ 50

Segment Data - Assets (Details)

Segment Data - Assets (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total assets	$ 6,525	$ 7,016.3
Inter-segment right of use lease assets	(180.3)	$ (183.6)
Total assets, excluding inter-segment notes receivable and right of use assets	6,525
Operating Segments | Refining
Segment Reporting Information [Line Items]
Total assets	6,103.2
Total assets, excluding inter-segment notes receivable and right of use assets	4,383.1
Operating Segments | Logistics
Segment Reporting Information [Line Items]
Total assets	957.7
Total assets, excluding inter-segment notes receivable and right of use assets	957.7
Operating Segments | Retail
Segment Reporting Information [Line Items]
Total assets	299.1
Total assets, excluding inter-segment notes receivable and right of use assets	299.1
Consolidation, Eliminations
Segment Reporting Information [Line Items]
Total assets, excluding inter-segment notes receivable and right of use assets	885.1
Intersegment Eliminations
Segment Reporting Information [Line Items]
Inter-segment notes receivable	1,326.3
Inter-segment right of use lease assets	393.8
Intersegment Eliminations | Refining
Segment Reporting Information [Line Items]
Inter-segment notes receivable	1,326.3
Inter-segment right of use lease assets	393.8
Intersegment Eliminations | Logistics
Segment Reporting Information [Line Items]
Inter-segment notes receivable	0
Inter-segment right of use lease assets	0
Intersegment Eliminations | Retail
Segment Reporting Information [Line Items]
Inter-segment notes receivable	0
Inter-segment right of use lease assets	$ 0

Segment Data - PP&E (Details)

Segment Data - PP&E (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Property, plant and equipment	$ 3,515.7	$ 3,515.7	$ 3,362.8
Less: accumulated depreciation	(1,091.8)	(1,091.8)	(934.5)
Property, plant and equipment, net	2,423.9	2,423.9	$ 2,428.3
Depreciation	63.3	171.8
Operating Segments | Refining
Segment Reporting Information [Line Items]
Property, plant and equipment	2,558.2	2,558.2
Less: accumulated depreciation	(758.9)	(758.9)
Property, plant and equipment, net	1,799.3	1,799.3
Depreciation	48.5	127.3
Operating Segments | Logistics
Segment Reporting Information [Line Items]
Property, plant and equipment	684.2	684.2
Less: accumulated depreciation	(216.7)	(216.7)
Property, plant and equipment, net	467.5	467.5
Depreciation	9.5	24.4
Operating Segments | Retail
Segment Reporting Information [Line Items]
Property, plant and equipment	164.8	164.8
Less: accumulated depreciation	(45.4)	(45.4)
Property, plant and equipment, net	119.4	119.4
Depreciation	2.7	8.5
Consolidation, Eliminations
Segment Reporting Information [Line Items]
Property, plant and equipment, net	37.7	37.7
Depreciation	2.6
Corporate, Reconciling Items, And Eliminations [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment	108.5	108.5
Less: accumulated depreciation	$ (70.8)	(70.8)
Depreciation		$ 11.6

Earnings (Loss) Per Share (Deta

Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator for EPS - continuing operations
(Loss) income from continuing operations	$ (76.9)	$ 60	$ (285.4)	$ 299
Less: Income from continuing operations attributed to non-controlling interest	11.2	8.7	29.4	20.3
Net (loss) income attributable to Delek US	(88.1)	51.3	(314.8)	278.7
Numerator for EPS - discontinued operations
Income (loss) from discontinued operations attributed to Delek	$ 0	$ 0	$ 0	$ (0.8)
Denominator:
Weighted Average Number of Shares Outstanding( denominatior for basic EPS) (in shares)	73,669,310	75,028,562	73,551,970	76,463,435
Dilutive effect of stock-based awards	0	673,749	0	704,399
Weighted average common shares outstanding, assuming dilution (in shares)	73,669,310	75,702,311	73,551,970	77,167,834
EPS:
(Loss) income from continuing operations (USD per share)	$ (1.20)	$ 0.68	$ (4.28)	$ 3.64
Loss from discontinued operations (USD per share)	0	0	0	(0.01)
Basic income (loss) per share (USD per Share)	(1.20)	0.68	(4.28)	3.63
(Loss) income from continuing operations (USD per share)	(1.20)	0.68	(4.28)	3.61
Loss from discontinued operations (USD per share)	0	0	0	(0.01)
Diluted income (loss) per share (USD per share)	$ (1.20)	$ 0.68	$ (4.28)	$ 3.60
Stock Compensation Plan, Excluding Loss [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	3,873,055	1,846,919	3,807,699	2,003,283
Stock Compensation Plan, Loss [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	363,603	0	330,412	0
Share-based Payment Arrangement [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	4,236,658	1,846,919	4,138,111	2,003,283

Delek Logistics - Narrative (De

Delek Logistics - Narrative (Details) - USD ($) $ in Millions	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
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
Business Combination, Consideration Transferred Equity Interests Issued And Issuable, Shares	14,000,000
Limited Partner Interest, Shares								14,000,000
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
Big Spring Gathering Asset [Member]
Variable Interest Entity [Line Items]
Asset Acquisition, Consideration Transferred			$ 100
Asset Acquisition, Equity Interest Transfered As Consideration, Shares			5,000,000
Limited Partner [Member]
Variable Interest Entity [Line Items]
Stock Repurchased During Period, Shares				451,822
Stock Repurchased During Period, Value				$ 5

Delek Logistics - Subsidiary Ba

Delek Logistics - Subsidiary Balance Sheet (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
ASSETS
Cash and cash equivalents	$ 807.9	$ 955.3
Accounts receivable	518.7	792.6
Inventory	672	946.7
Other current assets	515.9	268.7
Property, plant and equipment, net	2,423.9	2,428.3
Equity method investments	373.1	407.3
Operating lease right-of-use assets	180.3	183.6
Goodwill	855.7	855.7
Intangible assets, net	109	110.3
Other non-current assets	68.5	67.8
Total assets	6,525	7,016.3
LIABILITIES AND EQUITY
Accounts payable	973.1	1,599.7
Current portion of operating lease liabilities	47.8	40.5
Accrued expenses and other current liabilities	657.1	346.8
Long-term debt, net of current portion	2,440.6	2,030.7
Asset retirement obligations	37.2	68.6
Deferred tax liabilities	316.2	267.9
Operating lease liabilities, net of current portion	132.6	144.3
Other non-current liabilities	37.4	30.9
Total liabilities and stockholders’ equity	6,525	7,016.3
Variable Interest Entity, Primary Beneficiary | Delek Logistics
ASSETS
Cash and cash equivalents	6	5.5
Accounts receivable	17.5	13.2
Due from Related Parties, Current	9.9	0
Inventory	1.7	12.6
Other current assets	0.4	2.3
Property, plant and equipment, net	467.5	295
Equity method investments	255.4	247
Operating lease right-of-use assets	18.1	3.7
Goodwill	12.2	12.2
Intangible assets, net	161.8	146.6
Other non-current assets	7	6.3
Total assets	957.5	744.4
LIABILITIES AND EQUITY
Accounts payable	4.7	12.5
Accounts payable to related parties	0	8.9
Current portion of operating lease liabilities	5.5	1.4
Accrued expenses and other current liabilities	13.8	12.2
Long-term debt, net of current portion	1,006.1	833.1
Asset retirement obligations	5.9	5.6
Deferred tax liabilities	1.2	0.2
Operating lease liabilities, net of current portion	12.6	2.3
Other non-current liabilities	19.2	19.3
Deficit	(111.5)	(151.1)
Total liabilities and stockholders’ equity	$ 957.5	$ 744.4

Equity Method Investments (Deta

Equity Method Investments (Details) $ in Millions	Jul. 30, 2019USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)joint_venture	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)	May 31, 2019USD ($)	May 14, 2015
Schedule of Equity Method Investments [Line Items]
Equity method investments		$ 373.1		$ 373.1		$ 407.3
Distribution from equity method investments				72	$ 0.8
Payments to Acquire Equity Method Investments				30.8	214
Income from equity method investment		12.8	$ 16.5	28.6	28.4
Red River Pipeline Company LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments		143.5		143.5		131	$ 124.7
Equity method investment, ownership percentage (as percent)							33.00%
Red River Expansion [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments							$ 3.5
Payments to Acquire Equity Method Investments				11.8
Wink To Webster Pipeline LLC
Schedule of Equity Method Investments [Line Items]
Equity method investments		73.3		73.3		125.3
Distribution from equity method investments				69.3
Equity method investment, ownership percentage (as percent)								15.00%
Payments to Acquire Equity Method Investments				18.9
Income from equity method investment		0.2		(1.8)
Red River
Schedule of Equity Method Investments [Line Items]
Income from equity method investment		$ 2		$ 6.8
Joint Ventures | Delek US Holdings, Inc.
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage (as percent)		50.00%		50.00%
Joint Ventures | Delek Logistics
Schedule of Equity Method Investments [Line Items]
Equity method investments		$ 111.8		$ 111.8		116
Income from equity method investment		2.9	3.7	$ 10.1	7.9
Number of joint ventures | joint_venture				2
Joint Ventures | Delek Renewables, LLC
Schedule of Equity Method Investments [Line Items]
Equity method investments		3.8		$ 3.8		4.3
Joint Ventures | Delek US Holdings, Inc.
Schedule of Equity Method Investments [Line Items]
Equity method investments		40.7		40.7		$ 30.7
Income from equity method investment		$ 7.5	$ 7.9	$ 13	$ 13.1
CP LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage (as percent)		50.00%		50.00%
Rangeland Rio [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage (as percent)		33.00%		33.00%
Minimum | Wink To Webster Pipeline LLC
Schedule of Equity Method Investments [Line Items]
Payments to Acquire Equity Method Investments	$ 340
Expected Period Of Construction	2 years
Maximum | Wink To Webster Pipeline LLC
Schedule of Equity Method Investments [Line Items]
Payments to Acquire Equity Method Investments	$ 380
Expected Period Of Construction	3 years

Inventory - Carrying Value (Det

Inventory - Carrying Value (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Inventory [Line Items]
Total inventories	$ 672	$ 946.7
Refining
Inventory [Line Items]
Refinery raw materials and supplies	261.4	400.4
Refinery work in process	82.9	109.1
Finished goods	299.1	397.5
Retail fuel	5.9	7.3
Retail merchandise	21	19.8
Logistics
Inventory [Line Items]
Finished goods	$ 1.7	$ 12.6

Inventory - Narrative (Details)

Inventory - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Inventory [Line Items]
Inventory valuation reserves	$ 67.5		$ 67.5		$ 1.7
Cost of sales
Inventory [Line Items]
Inventory valuation gains (losses)	9.5	$ (20)	(65.6)	$ 31.5
LIFO inventory
Inventory [Line Items]
Inventory valuation reserves	$ 65		$ 65		$ 1.2

Crude Oil Supply and Inventor_3

Crude Oil Supply and Inventory Purchase Agreement (Details) - J. Aron - Baseline Step-Out Liability - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Oil and Gas, Delivery Commitment [Line Items]
Gain (loss) on change in fair value resulting from modification of instruments	$ (1.5)
Alon Refinery [Member]
Oil and Gas, Delivery Commitment [Line Items]
Gain (loss) on change in fair value resulting from modification of instruments		$ 7.6

Crude Oil Supply and Inventor_4

Crude Oil Supply and Inventory Purchase Agreement - Barrels Subject to the Supply and Offtake Agreements (Details) - J. Aron - bbl bbl in Millions	Sep. 30, 2020	Dec. 31, 2019
El Dorado Refinery
Oil and Gas, Delivery Commitment [Line Items]
Barrels of inventory consigned to J Aron	3.8	3.5
Big Spring refinery
Oil and Gas, Delivery Commitment [Line Items]
Barrels of inventory consigned to J Aron	1.3	2
Krotz Spring Refinery
Oil and Gas, Delivery Commitment [Line Items]
Barrels of inventory consigned to J Aron	1.4	1.7
Baseline Step-Out Liability | El Dorado Refinery
Oil and Gas, Delivery Commitment [Line Items]
Barrels of inventory consigned to J Aron	2
Baseline Step-Out Liability | Big Spring refinery
Oil and Gas, Delivery Commitment [Line Items]
Barrels of inventory consigned to J Aron	0.8
Baseline Step-Out Liability | Krotz Spring Refinery
Oil and Gas, Delivery Commitment [Line Items]
Barrels of inventory consigned to J Aron	1.3

Crude Oil Supply and Inventor_5

Crude Oil Supply and Inventory Purchase Agreement - Payable (Receivable) Under Supply and Offtake Agreements (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Oil and Gas, Delivery Commitment [Line Items]
Revolving over/short inventory financing liability	$ 102.8	$ 207
Total Obligations Under Supply and Offtake Agreements	323.2	477.3
Less: Current portion	102.8	332.5
Obligations Under Supply and Offtake Agreements - Noncurrent portion	220.4	144.8
Other current payable for monthly activity true-up	13.6	(23)
El Dorado Refinery
Oil and Gas, Delivery Commitment [Line Items]
Baseline Step-Out Liability		125.5
Revolving over/short inventory financing liability	80.6	93
Total Obligations Under Supply and Offtake Agreements	181.1	218.5
Less: Current portion	80.6	218.5
Obligations Under Supply and Offtake Agreements - Noncurrent portion	100.5	0
Other current payable for monthly activity true-up	12.6	(16.4)
Big Spring refinery
Oil and Gas, Delivery Commitment [Line Items]
Revolving over/short inventory financing liability	19.7	73.5
Total Obligations Under Supply and Offtake Agreements	68.8	130.7
Less: Current portion	19.7	73.5
Obligations Under Supply and Offtake Agreements - Noncurrent portion	49.1	57.2
Other current payable for monthly activity true-up	1	(3.1)
Krotz Spring Refinery
Oil and Gas, Delivery Commitment [Line Items]
Baseline Step-Out Liability		87.6
Revolving over/short inventory financing liability	2.5	40.5
Total Obligations Under Supply and Offtake Agreements	73.3	128.1
Less: Current portion	2.5	40.5
Obligations Under Supply and Offtake Agreements - Noncurrent portion	70.8	87.6
Other current payable for monthly activity true-up	0	(3.5)
Baseline Step-Out Liability
Oil and Gas, Delivery Commitment [Line Items]
Baseline Step-Out Liability	220.4	270.3
Baseline Step-Out Liability | El Dorado Refinery
Oil and Gas, Delivery Commitment [Line Items]
Baseline Step-Out Liability	100.5
Baseline Step-Out Liability | Big Spring refinery
Oil and Gas, Delivery Commitment [Line Items]
Baseline Step-Out Liability	49.1	$ 57.2
Baseline Step-Out Liability | Krotz Spring Refinery
Oil and Gas, Delivery Commitment [Line Items]
Baseline Step-Out Liability	$ 70.8

Crude Oil Supply and Inventor_6

Crude Oil Supply and Inventory Purchase Agreement - Recurring Cash Fee Paid (Details) - Interest expense - J. Aron - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Oil and Gas, Delivery Commitment [Line Items]
Recurring cash fees paid	$ 3.3	$ 6.9	$ 13.3	$ 20.5
El Dorado Refinery
Oil and Gas, Delivery Commitment [Line Items]
Recurring cash fees paid	1.5	2.9	7.4	8.5
Krotz Spring Refinery
Oil and Gas, Delivery Commitment [Line Items]
Recurring cash fees paid	1.1	2.5	3.1	7.6
Big Spring refinery
Oil and Gas, Delivery Commitment [Line Items]
Recurring cash fees paid	$ 0.7	$ 1.5	$ 2.8	$ 4.4

Crude Oil Supply and Inventor_7

Crude Oil Supply and Inventory Purchase Agreement - Interest Expense (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Oil and Gas, Delivery Commitment [Line Items]
Gain (Loss) On Financing Interest Expense		$ 0		$ 7.7	$ (3.9)	$ 11.4
Interest expense | J. Aron
Oil and Gas, Delivery Commitment [Line Items]
Financing Interest Expense	$ 3.3		$ 8.4		17.2	23.3
El Dorado Refinery | Interest expense | J. Aron
Oil and Gas, Delivery Commitment [Line Items]
Financing Interest Expense	1.5		3.7		7.8	10.9
Krotz Spring Refinery | Interest expense | J. Aron
Oil and Gas, Delivery Commitment [Line Items]
Financing Interest Expense	1.1		2.7		3.5	8.8
Big Spring refinery | Interest expense | J. Aron
Oil and Gas, Delivery Commitment [Line Items]
Financing Interest Expense	$ 0.7		$ 2		$ 5.9	$ 3.6

Crude Oil Supply and Inventor_8

Crude Oil Supply and Inventory Purchase Agreement - Letters of Credit (Details) - J. Aron - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
El Dorado Refinery
Oil and Gas, Delivery Commitment [Line Items]
Letters of credit outstanding	$ 170	$ 180
Big Spring And Krotz Spring
Oil and Gas, Delivery Commitment [Line Items]
Letters of credit outstanding	$ 10	$ 44

Long-Term Obligations and Not_3

Long-Term Obligations and Notes Payable - Outstanding Borrowings Schedule (Details)	Dec. 31, 2019USD ($)	Sep. 30, 2020USD ($)	Dec. 15, 2019USD ($)	Mar. 30, 2018USD ($)	Mar. 30, 2018CAD ($)	May 23, 2017USD ($)
Debt Instrument [Line Items]
Long-term Debt	$ 2,067,100,000	$ 2,474,000,000
Current portion of long-term debt	36,400,000	33,400,000
Long-term debt, net of current portion	2,030,700,000	2,440,600,000
Term loan
Footnote:
Face amount of debt				$ 700,000,000
Debt Instrument, Original Debt Issue Discount				0.50%	0.50%
Maximum borrowing capacity		$ 1,276,300,000
Debt Instrument, Weighted Average Borrowing Rate		3.04%
Delek Term Loan Credit Facility | Term loan
Debt Instrument [Line Items]
Long-term Debt	1,069,500,000	$ 1,248,600,000
Footnote:
Deferred financing costs	3,500,000	3,000,000
Debt discount	12,500,000	24,700,000
Hapoalim Term Loan [Member] | Line of credit
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment	100,000
Footnote:
Face amount of debt	40,000,000	$ 39,700,000
Debt Instrument, Interest Rate, Effective Percentage		3.58%
Maximum borrowing capacity		$ 100,000,000
Debt Instrument, Weighted Average Borrowing Rate		3.15%
Hapoalim Term Loan [Member] | Term loan
Debt Instrument [Line Items]
Long-term Debt	39,500,000	$ 39,300,000
Hapoalim Term Loan [Member] | Senior notes
Footnote:
Deferred financing costs	300,000	200,000
Debt discount	200,000	200,000
DKL Notes | Senior notes
Debt Instrument [Line Items]
Stated interest rate (as percent)						6.75%
Long-term Debt	244,700,000	245,400,000
Footnote:
Deferred financing costs	4,000,000	3,500,000
Debt discount	1,300,000	1,100,000
Face amount of debt		$ 250,000,000				$ 250,000,000
Debt Instrument, Interest Rate, Effective Percentage		7.22%
Promissory Notes
Debt Instrument [Line Items]
Long-term Debt	45,000,000	$ 20,000,000
Revolving credit facility | Line of credit
Debt Instrument [Line Items]
Long-term Debt	30,000,000	$ 110,000,000
Footnote:
Debt Instrument, Interest Rate, Effective Percentage		3.57%
Maximum borrowing capacity				$ 1,000,000,000	$ 50,000,000
Debt Instrument, Weighted Average Borrowing Rate		3.50%
Revolving credit facility | DKL Revolver | Line of credit
Debt Instrument [Line Items]
Long-term Debt	588,400,000	$ 760,700,000
Revolving credit facility | Reliant Bank Revolver | Line of credit
Debt Instrument [Line Items]
Stated interest rate (as percent)		4.50%	4.75%
Long-term Debt	$ 50,000,000	$ 50,000,000
Footnote:
Maximum borrowing capacity		$ 50,000,000	$ 30,000,000

Long-Term Obligations and Not_4

Long-Term Obligations and Notes Payable - Line of Credit Narrative (Details)	May 19, 2020USD ($)	Dec. 31, 2019USD ($)	Nov. 12, 2019USD ($)	May 22, 2019USD ($)	Oct. 26, 2018	Mar. 30, 2018USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2020USD ($)	Dec. 15, 2019USD ($)	Sep. 28, 2018USD ($)	Mar. 30, 2018CAD ($)	May 23, 2017USD ($)
Debt Instrument [Line Items]
Outstanding borrowings		$ 2,067,100,000					$ 2,474,000,000	$ 2,474,000,000
Letter of credit
Debt Instrument [Line Items]
Maximum borrowing capacity							227,300,000	227,300,000
Senior notes | 2025 Notes [Member]
Debt Instrument [Line Items]
Face amount of debt							$ 250,000,000	$ 250,000,000				$ 250,000,000
Debt Instrument, Interest Rate, Effective Percentage							7.22%	7.22%
Outstanding borrowings		244,700,000					$ 245,400,000	$ 245,400,000
Line of credit | Hapoalim Term Loan [Member]
Debt Instrument [Line Items]
Face amount of debt		40,000,000					39,700,000	39,700,000
Maximum borrowing capacity							$ 100,000,000	$ 100,000,000
Debt Instrument, Interest Rate, Effective Percentage							3.58%	3.58%
Debt Instrument, Weighted Average Borrowing Rate							3.15%	3.15%
Debt Instrument, Periodic Payment		$ 100,000
Line of credit | London Interbank Offered Rate (LIBOR) | Hapoalim Term Loan [Member]
Debt Instrument [Line Items]
Basis spread (as percent)		3.00%
Line of credit | Revolving credit facility
Debt Instrument [Line Items]
Maximum borrowing capacity						$ 1,000,000,000					$ 50,000,000
Debt Instrument, Interest Rate, Effective Percentage							3.57%	3.57%
Debt Instrument, Weighted Average Borrowing Rate							3.50%	3.50%
Outstanding borrowings		$ 30,000,000					$ 110,000,000	$ 110,000,000
Letters of credit outstanding							227,300,000	227,300,000
Remaining borrowing capacity							662,700,000	662,700,000
Line of credit | Revolving credit facility | DKL Revolver
Debt Instrument [Line Items]
Outstanding borrowings		588,400,000					760,700,000	760,700,000
Line of credit | Revolving credit facility | Reliant Bank Revolver
Debt Instrument [Line Items]
Maximum borrowing capacity							50,000,000	$ 50,000,000	$ 30,000,000
Commitment fee percentage (as percent)								0.50%
Outstanding borrowings		50,000,000					50,000,000	$ 50,000,000
Remaining borrowing capacity							0	0
Line of credit | Revolving credit facility | Base Rate
Debt Instrument [Line Items]
Basis spread (as percent)						0.25%
Line of credit | Revolving credit facility | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread (as percent)						1.25%
Term loan
Debt Instrument [Line Items]
Face amount of debt						$ 700,000,000
Maximum borrowing capacity							$ 1,276,300,000	$ 1,276,300,000
Debt Instrument, Original Debt Issue Discount						0.50%					0.50%
Proceeds from term loan						$ 300,000,000
Debt Instrument, Prepayment Premium						1.00%					1.00%
Debt Instrument, Weighted Average Borrowing Rate							3.04%	3.04%
Term loan | Incremental Term Loans
Debt Instrument [Line Items]
Face amount of debt	$ 200,000,000		$ 150,000,000	$ 943,000,000		$ 250,000,000
Debt Instrument, Original Debt Issue Discount	7.00%		1.21%	0.75%
Outstanding borrowings			$ 1,088,300,000
Debt Instrument, Periodic Payment	$ 500,000		$ 2,750,000	$ 2,380,000		$ 1,750,000
Term loan | Hapoalim Term Loan [Member]
Debt Instrument [Line Items]
Outstanding borrowings		$ 39,500,000					$ 39,300,000	$ 39,300,000
Term loan | Base Rate
Debt Instrument [Line Items]
Basis spread (as percent)						1.50%
Term loan | Base Rate | Incremental Term Loans
Debt Instrument [Line Items]
Basis spread (as percent)	4.50%
Term loan | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread (as percent)						2.50%
Term loan | London Interbank Offered Rate (LIBOR) | Incremental Term Loans
Debt Instrument [Line Items]
Basis spread (as percent)	5.50%
Debt Instrument, Variable Rate, Floor	1.00%
Letter of credit
Debt Instrument [Line Items]
Maximum borrowing capacity						$ 400,000,000					$ 10,000,000
Fifth Third Bank | Line of credit | Revolving credit facility | DKL Revolver
Debt Instrument [Line Items]
Commitment fee percentage (as percent)								0.40%
Remaining borrowing capacity							$ 89,300,000	$ 89,300,000
Maximum borrowing capacity under accordion feature										$ 1,000,000,000
Weighted average interest rate (as percent)							2.69%	2.69%
Fifth Third Bank | Line of credit | Revolving credit facility | Base Rate | DKL Revolver
Debt Instrument [Line Items]
Description of variable rate basis								U.S. dollar prime rate
Fifth Third Bank | Line of credit | Revolving credit facility | Canadian Prime Rate | DKL Revolver
Debt Instrument [Line Items]
Description of variable rate basis								Canadian dollar prime rate
Fifth Third Bank | Line of credit | Revolving credit facility | London Interbank Offered Rate (LIBOR) | DKL Revolver
Debt Instrument [Line Items]
Description of variable rate basis								LIBOR
Maximum | Line of credit | Revolving credit facility
Debt Instrument [Line Items]
Commitment fee percentage (as percent)						0.375%		0.375%
Maximum | Line of credit | Revolving credit facility | Base Rate
Debt Instrument [Line Items]
Basis spread (as percent)							0.75%
Maximum | Line of credit | Revolving credit facility | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread (as percent)							1.75%
Maximum | Term loan
Debt Instrument [Line Items]
Debt Instrument, Covenant, Prepayment As A Variable Percentage Of Excess Cash Flow						0.00%					0.00%
Minimum | Line of credit | Revolving credit facility
Debt Instrument [Line Items]
Commitment fee percentage (as percent)						0.25%
Minimum | Term loan
Debt Instrument [Line Items]
Debt Instrument, Covenant, Prepayment As A Variable Percentage Of Excess Cash Flow						50.00%					50.00%
Minimum | Term loan | Base Rate
Debt Instrument [Line Items]
Basis spread (as percent)					1.25%
Minimum | Term loan | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread (as percent)					2.25%

Long-Term Obligations and Not_5

Long-Term Obligations and Notes Payable - DKL Notes (Details) - USD ($)	May 23, 2017	Sep. 30, 2020	Sep. 28, 2018
Senior notes | DKL Notes
Debt Instrument [Line Items]
Face amount of debt	$ 250,000,000	$ 250,000,000
Stated interest rate (as percent)	6.75%
Redemption price, percentage (as percent)		101.00%
Debt Instrument, Interest Rate, Effective Percentage		7.22%
Senior notes | DKL Notes | Twelve-month period beginning May 15, 2020
Debt Instrument [Line Items]
Redemption price, percentage (as percent)	105.063%
Senior notes | DKL Notes | Twelve-month period beginning May 15, 2021
Debt Instrument [Line Items]
Redemption price, percentage (as percent)	103.375%
Senior notes | DKL Notes | Twelve-month period beginning May 15, 2022
Debt Instrument [Line Items]
Redemption price, percentage (as percent)	101.688%
Senior notes | DKL Notes | Twelve-month period beginning May 15, 2023 and thereafter
Debt Instrument [Line Items]
Redemption price, percentage (as percent)	100.00%
Revolving credit facility | Line of credit
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage		3.57%
Fifth Third Bank | Revolving credit facility | Line of credit | DKL Revolver
Debt Instrument [Line Items]
Maximum borrowing capacity under accordion feature			$ 1,000,000,000

Long-Term Obligations and Not_6

Long-Term Obligations and Notes Payable - Reliant Bank Revolver (Details)	9 Months Ended
	Sep. 30, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 15, 2019USD ($)	Mar. 30, 2018USD ($)	Mar. 30, 2018CAD ($)
Line of Credit Facility [Line Items]
Long-term Debt	$ 2,474,000,000	$ 2,067,100,000
Line of credit | Revolving credit facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity				$ 1,000,000,000	$ 50,000,000
Long-term Debt	110,000,000	30,000,000
Remaining borrowing capacity	$ 662,700,000
Line of credit | Reliant Bank Revolver | Revolving credit facility
Line of Credit Facility [Line Items]
Stated interest rate (as percent)	4.50%		4.75%
Maximum borrowing capacity	$ 50,000,000		$ 30,000,000
Commitment fee percentage (as percent)	0.50%
Long-term Debt	$ 50,000,000	$ 50,000,000
Remaining borrowing capacity	$ 0

Long-Term Obligations and Not_7

Long-Term Obligations and Notes Payable - Promissory Notes Narrative (Details) $ in Millions	May 14, 2015USD ($)	Sep. 30, 2020USD ($)note_payable	Dec. 31, 2019USD ($)
Debt Instrument [Line Items]
Number of Notes Payable | note_payable		4
Outstanding borrowings		$ 2,474	$ 2,067.1
Loans payable | Unsecured Promissory Note, Alon | Alon
Debt Instrument [Line Items]
Principal installments	$ 25
Stated interest rate (as percent)	5.50%
Final principal amortization payment	$ 20
Outstanding borrowings		$ 20

Derivative Instruments - Narrat

Derivative Instruments - Narrative (Details)	9 Months Ended
	Sep. 30, 2020
Commodity contracts
Derivative [Line Items]
Derivative, Maturity Date, Maximum Period	3 years

Derivative Instruments - Deriva

Derivative Instruments - Derivative Assets and Liabilities (Details) $ in Millions	Sep. 30, 2020USD ($)	Sep. 30, 2020bbl	Sep. 30, 2020MMBTU	Sep. 30, 2020rins	Dec. 31, 2019USD ($)	Dec. 31, 2019bbl	Dec. 31, 2019MMBTU	Dec. 31, 2019rins
Derivatives, Fair Value [Line Items]
Assets	$ 1,352.7				$ 240.9
Liabilities	(1,346.8)				(264.9)
Counterparty netting and cash collateral, Assets	1,319.6				210.7
Counterparty netting and cash collateral, Liabilities	(1,328.7)				(249.5)
Total net fair value of derivative assets	33.1				30.2
Total net fair value of derivative liabilities	(18.1)				(15.4)
Footnote:
Cash collateral	9.1				38.8
Commodity contracts
Footnote:
Derivative, Nonmonetary Notional Amount		193,693,716	13,180,000			86,484,065	40,050,000
RIN commitment contracts
Footnote:
Derivative, Nonmonetary Notional Amount | rins				59,200,000				147,000,000
Derivatives not designated as hedging instruments: | Commodity contracts | Other current assets
Derivatives, Fair Value [Line Items]
Assets	90.9				188.9
Liabilities	71.3				202.1
Derivatives not designated as hedging instruments: | Commodity contracts | Other current liabilities
Derivatives, Fair Value [Line Items]
Assets	881.2				24.4
Liabilities	(896.2)				34
Derivatives not designated as hedging instruments: | Commodity contracts | Other long-term assets
Derivatives, Fair Value [Line Items]
Assets	0.1				0
Liabilities	0				0
Derivatives not designated as hedging instruments: | Commodity contracts | Other long-term liabilities
Derivatives, Fair Value [Line Items]
Assets	374.9				23.4
Liabilities	(376.7)				(24.8)
Derivatives not designated as hedging instruments: | RIN commitment contracts | Other current assets
Derivatives, Fair Value [Line Items]
Assets	2.9				0.6
Liabilities	0				0
Derivatives not designated as hedging instruments: | RIN commitment contracts | Other current liabilities
Derivatives, Fair Value [Line Items]
Assets	0				0
Liabilities	(1.1)				(1.9)
Derivatives designated as hedging instruments: | Commodity contracts
Footnote:
Derivative, Nonmonetary Notional Amount | bbl		90,000				600,000
Derivatives designated as hedging instruments: | Commodity contracts | Other current assets
Derivatives, Fair Value [Line Items]
Assets	2.7				3.4
Liabilities	(1.5)				(2)
Derivatives designated as hedging instruments: | Commodity contracts | Other long-term assets
Derivatives, Fair Value [Line Items]
Assets	0				0.2
Liabilities	$ 0				$ (0.1)

Derivative Instruments - Deri_2

Derivative Instruments - Derivatives Gains and Losses (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Total gains (losses)	$ 6	$ 12.8	$ (74.2)	$ 63.7
Not Designated as Hedging Instrument | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gains (losses) on economic hedges	(19.4)	0.5	9.2	(30.1)
Unrealized Gain (Loss) on Cash Flow Hedging Instruments that have matured but not cash settled			0.4	(13)
Not Designated as Hedging Instrument | Commodity contracts | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on commodity derivatives not designated as hedging instruments	5.1	34.2	(85.8)	118.5
Not Designated as Hedging Instrument | Commodity contracts | Other Operating Income (Expense) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on commodity derivatives not designated as hedging instruments	0.1	(0.3)	7.9	0.2
Designated as Hedging Instrument | Commodity contracts | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Realized gains (losses) reclassified out of accumulated other comprehensive income and into cost of materials and other on commodity derivatives designated as cash flow hedging instruments	$ 0.8	$ (21.1)	$ 3.7	$ (55)

Derivative Instruments - Effect

Derivative Instruments - Effect of Cash Flow Hedges on Statement of Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) on cash flow hedging relationships	$ 0	$ 0		$ 0
Commodity contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) on cash flow hedging relationships	(0.8)	21.1	$ (3.7)	55
Derivatives designated as hedging instruments: | Commodity contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) on cash flow hedging relationships	0.8	(21.1)	3.7	(55)
Cost of sales | Commodity contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	0.7	$ 16.6	3	$ 43.4
Cash flow hedges to be reclassified into cost of goods sold over the next 12 months			$ 1.2
Cost of sales | Derivatives designated as hedging instruments: | Commodity contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Component of the derivative instruments’ gains or losses was excluded from the assessment of hedge effectiveness	$ 0

Derivative Instruments - Gains

Derivative Instruments - Gains on Forward Contract Derivatives (Details) - Forward Contracts - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Realized (losses) gains	$ (0.4)	$ (1.4)	$ (3.4)	$ 3.3
Unrealized (losses) gains	0.2	4.5	(0.5)	6.6
Total	$ (0.2)	$ 3.1	$ (3.9)	$ 9.9

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized gain (loss) on commodity contracts	$ (0.1)	$ (0.1)	$ (1)	$ 1.9
Assets
Total assets	231.1		231.1		$ 14.5
Liabilities
Cash collateral	9.1		9.1		38.8
Other Nonoperating Income (Expense)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized gain (loss) on commodity contracts	0.9		10.6
Fair Value, Measurements, Recurring
Assets
Total assets	1,390.3		1,390.3		269.8
Liabilities
Total liabilities	(1,903.6)		(1,903.6)		(760.7)
Net assets (liabilities)	(513.3)		(513.3)		(490.9)
Fair Value, Measurements, Recurring | Commodity contracts
Assets
Total assets	1,349.8		1,349.8		240.3
Liabilities
Total liabilities	(1,345.7)		(1,345.7)		(263)
Fair Value, Measurements, Recurring | Commodities Investment
Assets
Total assets	1		1		12.1
Fair Value, Measurements, Recurring | Right To Receive Crude Oil Barrels [Member]
Assets
Total assets	36.6		36.6
Fair Value, Measurements, Recurring | RIN commitment contracts
Assets
Total assets	2.9		2.9		0.6
Liabilities
Total liabilities	(1.1)		(1.1)		(1.9)
Fair Value, Measurements, Recurring | Environmental Credits Obligation
Assets
Total assets					16.8
Liabilities
Total liabilities	(233.6)		(233.6)		(18.5)
Fair Value, Measurements, Recurring | J. Aron supply and offtake obligations
Liabilities
Total liabilities	(323.2)		(323.2)		(477.3)
Fair Value, Measurements, Recurring | Level 1
Assets
Total assets	1		1		12.1
Liabilities
Total liabilities	0		0		0
Net assets (liabilities)	1		1		12.1
Fair Value, Measurements, Recurring | Level 1 | Commodity contracts
Assets
Total assets	0		0		0
Liabilities
Total liabilities	0		0		0
Fair Value, Measurements, Recurring | Level 1 | Commodities Investment
Assets
Total assets	1		1		12.1
Fair Value, Measurements, Recurring | Level 1 | Right To Receive Crude Oil Barrels [Member]
Assets
Total assets	0		0
Fair Value, Measurements, Recurring | Level 1 | RIN commitment contracts
Assets
Total assets	0		0		0
Liabilities
Total liabilities	0		0		0
Fair Value, Measurements, Recurring | Level 1 | Environmental Credits Obligation
Assets
Total assets					0
Liabilities
Total liabilities	0		0		0
Fair Value, Measurements, Recurring | Level 1 | J. Aron supply and offtake obligations
Liabilities
Total liabilities	0		0		0
Fair Value, Measurements, Recurring | Level 2
Assets
Total assets	1,389.3		1,389.3		257.7
Liabilities
Total liabilities	(1,903.6)		(1,903.6)		(760.7)
Net assets (liabilities)	(514.3)		(514.3)		(503)
Fair Value, Measurements, Recurring | Level 2 | Commodity contracts
Assets
Total assets	1,349.8		1,349.8		240.3
Liabilities
Total liabilities	(1,345.7)		(1,345.7)		(263)
Fair Value, Measurements, Recurring | Level 2 | Commodities Investment
Assets
Total assets	0		0		0
Fair Value, Measurements, Recurring | Level 2 | Right To Receive Crude Oil Barrels [Member]
Assets
Total assets	36.6		36.6
Fair Value, Measurements, Recurring | Level 2 | RIN commitment contracts
Assets
Total assets	2.9		2.9		0.6
Liabilities
Total liabilities	(1.1)		(1.1)		(1.9)
Fair Value, Measurements, Recurring | Level 2 | Environmental Credits Obligation
Assets
Total assets					16.8
Liabilities
Total liabilities	(233.6)		(233.6)		(18.5)
Fair Value, Measurements, Recurring | Level 2 | J. Aron supply and offtake obligations
Liabilities
Total liabilities	323.2		323.2		(477.3)
Fair Value, Measurements, Recurring | Level 3
Assets
Total assets	0		0		0
Liabilities
Total liabilities	0		0		0
Net assets (liabilities)	0		0		0
Fair Value, Measurements, Recurring | Level 3 | Commodity contracts
Assets
Total assets	0		0		0
Liabilities
Total liabilities	0		0		0
Fair Value, Measurements, Recurring | Level 3 | Commodities Investment
Assets
Total assets	0		0		0
Fair Value, Measurements, Recurring | Level 3 | Right To Receive Crude Oil Barrels [Member]
Assets
Total assets	0		0
Fair Value, Measurements, Recurring | Level 3 | RIN commitment contracts
Assets
Total assets	0		0		0
Liabilities
Total liabilities	0		0		0
Fair Value, Measurements, Recurring | Level 3 | Environmental Credits Obligation
Assets
Total assets					0
Liabilities
Total liabilities	0		0		0
Fair Value, Measurements, Recurring | Level 3 | J. Aron supply and offtake obligations
Liabilities
Total liabilities	$ 0		$ 0		$ 0

Commitments and Contingencies -

Commitments and Contingencies - Litigation (Details) $ in Millions	3 Months Ended
	Dec. 31, 2019USD ($)
El Dorado refinery prior owner case
Site Contingency [Line Items]
Loss Contingency, Damages Sought, Value	$ 6.4

Commitments and Contingencies_2

Commitments and Contingencies - Self-Insurance (Details) $ in Millions	Sep. 30, 2020USD ($)
Loss Contingencies [Line Items]
Self insurance workers' compensation coverage ceiling per accident	$ 4
Self Insurance General Liability Claims Coverage Ceiling per Occurrence	4
Self Insurance, Medical Coverage for Employees Per Claim	0.3
Self Insurance Auto Liability Coverage Ceiling per accident	$ 4

Commitments and Contingencies_3

Commitments and Contingencies - Environmental Health and Safety (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Loss Contingencies [Line Items]
Environmental liabilities, current	$ 6.6	$ 8.2
El Dorado refinery prior owner case
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies, Including Undiscounted Amounts	$ 112.7
Accrued Environmental Loss Contingencies, Expected Expending Period, Extension	30 years

Commitments and Contingencies_4

Commitments and Contingencies - Crude Oil Releases (Details)	9 Months Ended
	Sep. 30, 2020oil_releases
Loss Contingencies [Line Items]
Number Of Crude Oil Releases	0

Commitments and Contingencies_5

Commitments and Contingencies - Letters of Credit (Details) - Letter of credit	Sep. 30, 2020USD ($)
Line of Credit Facility [Line Items]
Credit facility available	$ 227,300,000
Long-term Line of Credit	$ 0

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Effective tax rate (as percent)	16.90%	18.30%	32.00%	21.90%
CARES Act, Income Tax Benefit (Expense)			$ 16.8
Income Taxes Receivable	$ 165.6		$ 165.6

Related Party Transactions (Det

Related Party Transactions (Details) - Equity Method Investee - Related Party Transactions - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Related Party Transaction [Line Items]
Revenues	$ 27.6	$ 45.1	$ 57.5	$ 73.3
Costs of materials and other	$ 10.9	$ 20.3	$ 31.4	$ 33.7

Other Assets and Liabilities -

Other Assets and Liabilities - Other Current Assets (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Other Assets and Liabilities [Abstract]
Short-term derivative assets (see Note 9)	$ 33	$ 30.2
Income and other tax receivable	181.1	61.9
RINs assets	231.1	14.5
Right to receive crude oil barrels (see Note 10)	36.6	0
Prepaid expenses	19.2	21.9
Biodiesel tax credit (see Note 2)	3.2	97.5
Environmental Credits Obligation surplus (see Note 10)	7.3	16.8
Commodity investments	1	12.1
Other	3.4	13.8
Total	$ 515.9	$ 268.7

Other Assets and Liabilities _2

Other Assets and Liabilities - Other Non-Current Assets (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Schedule of Other Assets and Liabilities [Line Items]
Supply and Offtake receivable	$ 32.7	$ 32.7
Other Equity investment	10.4	8.9
Deferred financing costs	7.3	8.5
Other	18.1	17.7
Total	$ 68.5	$ 67.8

Other Assets and Liabilities _3

Other Assets and Liabilities - Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Schedule of Other Assets and Liabilities [Line Items]
Crude purchase liabilities	$ 74.3	$ 72.1
Income and other taxes payable	88.3	119.6
Environmental Credits Obligation deficit (see Note 10)	237.6	18.5
Product financing agreements	168.5	21.1
Short-term derivative liabilities (see Note 9)	16.3	14.1
Employee costs	23.8	47.6
Interest payable	9.6	8.8
Environmental liabilities (see Note 11)	6.6	8.2
Tank inspection liabilities, current	3.1	5.6
Accrued Utilities	3.7	4.4
Other	25.3	26.8
Total	657.1	346.8
Long-term derivative liabilities (see Note 9)	$ 1.8	$ 1.4

Other Assets and Liabilities _4

Other Assets and Liabilities - Other Non-Current Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Schedule of Other Assets and Liabilities [Line Items]
Liability for unrecognized tax benefits	$ 15.2	$ 12.1
Tank Inspection Liabilities Noncurrent	9.4	9.9
Pension and other postemployment benefit liabilities, net	3.1	5.3
Long-term derivative liabilities (see Note 9)	1.8	1.4
Deferred payroll taxes	7.8	0
Other	0.1	2.2
Other non-current liabilities	$ 37.4	$ 30.9

Equity-Based Compensation (Deta

Equity-Based Compensation (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	May 05, 2020	May 04, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued (in shares)	68,265		314,204
Delek US 2006 and 2016 Long-Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized equity-based compensation	$ 42.2		$ 42.2
Weighted-average period for amortization of unrecognized compensation cost			1 year 9 months 18 days
Shares issued (in shares)		78,695		462,318
Shares withheld (in shares)	31,020	146,148	161,469	470,232
Delek US 2006 and 2016 Long-Term Incentive Plan | General and administrative expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	$ 6.6	$ 7.3	$ 17.4	$ 18.7
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized					11,020,000	2,120,000

Shareholders' Equity - Dividend

Shareholders' Equity - Dividends (Details) - $ / shares	Aug. 03, 2020	May 04, 2020	Feb. 24, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Equity [Abstract]
Dividends declared per common share outstanding (in dollars per share)	$ 0.31	$ 0.31	$ 0.31	$ 0.31	$ 0.29	$ 0.93	$ 0.84

Shareholders' Equity - Stock Re

Shareholders' Equity - Stock Repurchase Program (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Nov. 06, 2018
Class of Stock [Line Items]
Repurchase of common stock (shares)	1,236,854	58,713	4,175,576
Repurchase of common stock	$ 43,000,000	$ 1,900,000	$ 147,800,000
Common Stock
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount				$ 500,000,000
Stock Purchase Agreement [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 229,700,000

Shareholders' Equity - Stockhol

Shareholders' Equity - Stockholder Rights Plan (Details) - $ / shares	Mar. 20, 2020	Sep. 30, 2020
Equity [Abstract]
Dividends, Preferred Stock, Stock, Par Value	$ 0.01
Dividend, Preferred Stock, Stock, Exercise Price	$ 92.24
Stockholder Ownership Threshold, Percent		20.00%

Shareholders' Equity - Preferre

Shareholders' Equity - Preferred Stock (Details) - $ / shares	Sep. 30, 2020	Mar. 20, 2020	Dec. 31, 2019
Equity [Abstract]
Preferred stock, shares authorized (in shares)	10,000,000	1,000,000	10,000,000
Preferred Stock, No Par Value		$ 0.01

Leases (Details)

Leases (Details) $ in Millions	Sep. 30, 2020USD ($)
Lessee, Lease, Description [Line Items]
Property, plant and equipment balance subject to operating lease	$ 26.8
Minimum
Lessee, Lease, Description [Line Items]
Lease renewal term (in years)	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lease renewal term (in years)	15 years

Leases - Lease Cost (Details)

Leases - Lease Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Lease Cost
Operating lease costs	$ 16.9	$ 13.5	$ 48.5	$ 44.1
Short-term lease costs (1)	5.4	4	19.1	11.3
Sublease income	(1.8)	(1.9)	(5.7)	(6.4)
Net lease costs	20.5	15.6	61.9	49
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	(16.9)	(13.5)	(48.5)	(44.1)
Non-cash lease liability arising from obtaining right of use assets during the period	$ 8.5	$ 1.5	$ 30.7	$ 9.6
Weighted-average remaining lease term (years) operating leases	6 years 1 month 6 days		6 years 1 month 6 days
Weighted-average discount rate operating leases (2)	5.90%		5.90%

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions	Oct. 30, 2020	Aug. 03, 2020	May 04, 2020	Feb. 24, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Subsequent Event [Line Items]
Dividends declared per common share outstanding (in dollars per share)		$ 0.31	$ 0.31	$ 0.31	$ 0.31	$ 0.29	$ 0.93	$ 0.84
Subsequent event
Subsequent Event [Line Items]
Supply And Offtake Obligation, Paydown	$ 20.8
Supply And Offtake Obligation, Deferred Fees Refunded	$ 10