Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Current assets:
Cash and cash equivalents	$ 628.6	$ 625.8
Accounts receivable, net	866.3	648.7
Inventories, net of inventory valuation reserves	999.3	726.0
Other current assets	108.7	67.5
Total current assets	2,602.9	2,068.0
Property, plant and equipment:
Property, plant and equipment	5,909.4	5,586.9
Less: accumulated depreciation	(2,476.6)	(2,314.4)
Property, plant and equipment, net	3,432.8	3,272.5
Operating lease right-of-use assets	66.2	71.4
Goodwill	475.3	475.3
Other intangibles, net	400.4	405.7
Equity method investments	430.9	427.7
Other non-current assets	142.9	127.1
Total assets	7,551.4	6,847.7
Current liabilities:
Accounts payable	1,853.0	1,633.8
Current portion of long-term debt	8.5	9.5
Current portion of operating lease liabilities	27.2	27.2
Accrued expenses and other current liabilities	1,522.6	858.9
Total current liabilities	3,411.3	2,529.4
Non-current liabilities:
Long-term debt, net of current portion	3,181.2	3,223.6
Obligation under Inventory Intermediation Agreement	95.2	119.5
Environmental liabilities, net of current portion	30.7	31.1
Asset retirement obligations	36.3	34.0
Deferred tax liabilities	152.3	217.9
Operating lease liabilities, net of current portion	38.3	46.1
Other non-current liabilities	183.4	98.8
Total non-current liabilities	3,717.4	3,771.0
Stockholders’ equity:
Preferred stock, $0.01 par value, 10,000,000 shares authorized, no shares issued and outstanding	0.0	0.0
Common stock, $0.01 par value, 110,000,000 shares authorized, 78,774,745 shares and 77,357,447 shares issued at June 30, 2026, and December 31, 2025, respectively	0.8	0.8
Additional paid-in capital	1,267.6	1,290.9
Treasury stock, 17,575,527 shares, at cost, at June 30, 2026, and December 31, 2025, respectively	(694.1)	(694.1)
Retained earnings (deficit)	(387.8)	(311.1)
Non-controlling interests in subsidiaries	236.2	260.8
Total stockholders’ equity	422.7	547.3
Total liabilities and stockholders’ equity	$ 7,551.4	$ 6,847.7

Inventory Intermediation Agreement Obligation, Noncurrent

No definition available.

Name:	dk_InventoryIntermediationAgreementObligationNoncurrent
Namespace Prefix:	dk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).