Murphy USA (MUSA) 10-K15 Feb 242023 FY Annual reportFinancial data

Company Profile

Cover

Cover - USD ($) $ in Thousands	12 Months Ended
Cover - USD ($) $ in Thousands	Dec. 31, 2023	Jan. 31, 2024	Jun. 30, 2023
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2023
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-35914
Entity Registrant Name	MURPHY USA INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	46-2279221
Entity Address, Address Line One	200 Peach Street
Entity Address, City or Town	El Dorado,
Entity Address, State or Province	AR
Entity Address, Postal Zip Code	71730-5836
City Area Code	870
Local Phone Number	875-7600
Title of 12(b) Security	Common Stock, $0.01 Par Value
Trading Symbol	MUSA
Security Exchange Name	NYSE
Entity Well-Known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Company	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction	false
Entity Shell Company	false
Entity Public Float			$ 6,675,692
Entity Common Stock, Shares Outstanding		20,806,624
Documents Incorporated by Reference	Documents incorporated by reference: Portions of the Registrant’s definitive Proxy Statement relating to the 2024 Annual Meeting of Stockholders will be incorporated by reference in Part III herein.
Amendment Flag	false
Entity Central Index Key	0001573516
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY

Audit Information

Audit Information	12 Months Ended
Audit Information	Dec. 31, 2023
Audit Information [Abstract]
Auditor Firm ID	185
Auditor Name	KPMG LLP
Auditor Location	Dallas, Texas

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 117.8	$ 60.5
Marketable securities, current	7.1	17.9
Accounts receivable—trade, less allowance for doubtful accounts of $1.3 in 2023 and $0.3 in 2022, respectively	336.7	281.7
Inventories, at lower of cost or market	341.2	319.1
Prepaid expenses and other current assets	23.7	47.6
Total current assets	826.5	726.8
Marketable securities, non-current	4.4	4.4
Property, plant and equipment, at cost less accumulated depreciation and amortization of $1,694.2 in 2023 and $1,553.1 in 2022 respectively	2,571.8	2,459.3
Operating lease right of use assets, net	452.1	449.6
Intangible assets, net of amortization	139.8	140.4
Goodwill	328	328
Other assets	17.5	14.7
Total assets	4,340.1	4,123.2
Current liabilities
Current maturities of long-term debt	15	15
Trade accounts payable and accrued liabilities	834.7	839.2
Income taxes payable	23.1	0
Total current liabilities	872.8	854.2
Long-term debt, including capitalized lease obligations	1,784.7	1,791.9
Deferred income taxes	329.5	327.4
Asset retirement obligations	46.1	43.3
Non-current operating lease liabilities	450.3	444.2
Deferred credits and other liabilities	27.8	21.5
Total liabilities	3,511.2	3,482.5
Stockholders' Equity
Preferred Stock, par $0.01, (authorized 20,000,000 shares, none outstanding)	0	0
Common Stock, par $0.01, (authorized 200,000,000 shares, 46,767,164 shares issued at December 31, 2023 and 2022, respectively)	0.5	0.5
Treasury stock (25,490,133 and 25,017,324 shares held at December 31, 2022 and 2021, respectively)	(2,957.8)	(2,633.3)
Additional paid in capital (APIC)	508.1	518.9
Retained earnings	3,278.1	2,755.1
Accumulated other comprehensive income (AOCI)	0	(0.5)
Total stockholders' equity	828.9	640.7
Total liabilities and stockholders' equity	$ 4,340.1	$ 4,123.2

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Accounts receivable - trade, allowance for doubtful accounts	$ 1.3	$ 0.3
Accumulated depreciation and amortization	$ 1,739.2	$ 1,553.1
Stockholders' Equity
Preferred stock par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock shares authorized (in shares)	20,000,000	20,000,000
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)	200,000,000	200,000,000
Common stock shares issued (in shares)	46,767,164	46,767,164
Treasury stock (in shares)	25,929,836	25,017,324

Consolidated Income Statements

Consolidated Income Statements - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Revenues
Total operating revenues	$ 21,529.4	$ 23,446.1	$ 17,360.5
Operating Expenses
Store and other operating expenses	1,014.8	976.5	827.3
Depreciation and amortization	228.7	220.4	212.6
Selling, general and administrative	240.5	232.5	193.6
Accretion of asset retirement obligations	3	2.7	2.5
Acquisition related costs	0	1.5	10.4
Total operating expenses	20,702.6	22,479.8	16,758
Gain (loss) on sale of assets	(0.8)	2.1	1.5
Income (loss) from operations	826	968.4	604
Other income (expense)
Investment income	6.9	3	0.1
Interest expense	(98.5)	(85.3)	(82.4)
Other nonoperating income (expense)	0	(2.3)	0.2
Total other income (expense)	(91.6)	(84.6)	(82.1)
Income before income taxes	734.4	883.8	521.9
Income tax expense (benefit)	177.6	210.9	125
Net Income	$ 556.8	$ 672.9	$ 396.9
Basic and Diluted Earnings Per Common Share:
Basic (in dollars per share)	$ 25.91	$ 28.63	$ 15.14
Diluted (in dollars per share)	$ 25.49	$ 28.10	$ 14.92
Weighted-average shares outstanding (in thousands):
Basic (in shares)	21,493	23,506	26,210
Diluted (in shares)	21,843	23,950	26,604
Supplemental information:
Includes excise taxes of	$ 2,291.2	$ 2,180.2	$ 2,041.7
Petroleum product sales
Operating Revenues
Total operating revenues	17,104.4	19,230.1	13,410.8
Operating Expenses
Operating expenses	15,929.7	17,910.1	12,535.5
Merchandise sales
Operating Revenues
Total operating revenues	4,089.3	3,903.2	3,677.7
Operating Expenses
Operating expenses	3,285.9	3,136.1	2,976.1
Other operating revenues
Operating Revenues
Total operating revenues	$ 335.7	$ 312.8	$ 272

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 556.8	$ 672.9	$ 396.9
Interest rate swap:
Realized gain (loss)	0	0	(0.1)
Unrealized gain (loss)	0	0	0.1
Marketable securities:
Unrealized gain (loss)	0.1	0	0
Reclassified to interest expense (interest rate swap):
Realized (gain) loss reclassified to interest expense	0	0	0.1
Amortization of unrealized gain to interest expense	0.6	0.9	0.9
Total	0.7	0.9	1
Deferred income tax expense (benefit)	0.2	0.2	0.3
Other comprehensive income (loss)	0.5	0.7	0.7
Comprehensive income	$ 557.3	$ 673.6	$ 397.6

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Activities
Net income	$ 556.8	$ 672.9	$ 396.9
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	228.7	220.4	212.6
Deferred and noncurrent income tax charges (benefits)	2	31.5	19
Accretion of asset retirement obligations	3	2.7	2.5
Amortization of discount on marketable securities	(0.4)	(0.1)	0
(Gains) losses from sale of assets	0.8	(2.1)	(1.5)
Net (increases) decrease in noncash operating working capital	(42.1)	44.8	82.8
Other operating activities - net	35.2	24.6	25.1
Net cash provided (required) by operating activities	784	994.7	737.4
Investing Activities
Property additions	(335.6)	(305.3)	(274.7)
Payments for acquisition, net of cash acquired	0	0	(641.1)
Proceeds from sale of assets	2.4	8.8	3.4
Investment in marketable securities	(12.8)	(22.2)	0
Redemptions of marketable securities	24	0	0
Other investing activities - net	(1.6)	(0.6)	(1.8)
Net cash provided (required) by investing activities	(323.6)	(319.3)	(914.2)
Financing Activities
Purchase of treasury stock	(333.2)	(806.4)	(355)
Dividends paid	(33.4)	(29.9)	(27.3)
Borrowings of debt	8	5	892.8
Repayments of debt	(23.4)	(20.2)	(224.3)
Debt issuance costs	0	0	(9.9)
Amounts related to share-based compensation	(21.1)	(19.8)	(6.7)
Net cash provided (required) by financing activities	(403.1)	(871.3)	269.6
Net increase (decrease) in cash, cash equivalents and restricted cash	57.3	(195.9)	92.8
Cash, cash equivalents and restricted cash at January 1	60.5	256.4	163.6
Cash, cash equivalents and restricted cash at December 31	$ 117.8	$ 60.5	$ 256.4

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity - USD ($) $ in Millions	Total	Common Stock	Treasury Stock	APIC	Retained Earnings	AOCI
Beginning balance (in shares) at Dec. 31, 2020		46,767,164
Beginning balance at Dec. 31, 2020	$ 784.1	$ 0.5	$ (1,490.9)	$ 533.3	$ 1,743.1	$ (1.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	396.9				396.9
Gain on interest rate hedge and unrealized gain on marketable securities, net of tax	0.7					0.7
Cash dividends declared	(27.3)				(27.3)
Dividend equivalent units accrued	0			0.3	(0.3)
Purchase of treasury stock	(355)		(355)
Issuance of treasury stock	0.1		6.6	(6.5)
Amounts related to share-based compensation	(6.7)			(6.7)
Share-based compensation expense	14.4			14.4
Ending balance (in shares) at Dec. 31, 2021		46,767,164
Ending balance at Dec. 31, 2021	807.2	$ 0.5	(1,839.3)	534.8	2,112.4	(1.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	672.9				672.9
Gain on interest rate hedge and unrealized gain on marketable securities, net of tax	0.7					0.7
Cash dividends declared	(29.9)				(29.9)
Dividend equivalent units accrued	0			0.3	(0.3)
Purchase of treasury stock	(806.4)		(806.4)
Issuance of treasury stock	0		12.4	(12.4)
Amounts related to share-based compensation	(19.8)			(19.8)
Share-based compensation expense	$ 16			16
Ending balance (in shares) at Dec. 31, 2022	46,767,164	46,767,164
Ending balance at Dec. 31, 2022	$ 640.7	$ 0.5	(2,633.3)	518.9	2,755.1	(0.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	556.8				556.8
Gain on interest rate hedge and unrealized gain on marketable securities, net of tax	0.5					0.5
Cash dividends declared	(33.4)				(33.4)
Dividend equivalent units accrued	0			0.4	(0.4)
Purchase of treasury stock	(336.2)		(336.2)
Issuance of treasury stock	(0.2)		11.7	(11.9)
Amounts related to share-based compensation	(21.1)			(21.1)
Share-based compensation expense	$ 21.8			21.8
Ending balance (in shares) at Dec. 31, 2023	46,767,164	46,767,164
Ending balance at Dec. 31, 2023	$ 828.9	$ 0.5	$ (2,957.8)	$ 508.1	$ 3,278.1	$ 0

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Stockholders' Equity [Abstract]
Dividends declared (in dollars per share)	$ 1.55	$ 1.27	$ 1.04

Description of Business and Bas

Description of Business and Basis of Presentation	12 Months Ended
Description of Business and Basis of Presentation	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business and Basis of Presentation	Description of Business and Basis of Presentation The business of Murphy USA Inc. and its subsidiaries (“Murphy USA”, "we", "our", "us", or the “Company”) primarily consists of the U.S. retail marketing business that was separated from its former parent company, Murphy Oil Corporation (“Murphy Oil”), plus other assets, liabilities and operating expenses of Murphy Oil that were associated with supporting the activities of the U.S. retail marketing operations. Murphy USA was incorporated in March 2013. The separation was approved by the Murphy Oil board of directors on August 7, 2013, and was completed on August 30, 2013 through the distribution of 100% of the outstanding capital stock of Murphy USA to holders of Murphy Oil common stock on the record date of August 21, 2013. Following the separation, Murphy USA is an independent, publicly traded company, and Murphy Oil retains no ownership interest in Murphy USA. On January 29, 2021, MUSA acquired 100% of Quick Chek Corporation ("QuickChek"), a privately held convenience store chain with a strong regional brand that consisted of 156 stores at the time of acquisition, located in New Jersey and New York, in an all-cash transaction. Murphy USA markets refined products through a network of retail gasoline stores and to unbranded wholesale customers. In addition, we operate non-fuel convenience stores in select markets. The Company owns and operates a chain of retail stores under the brand name of Murphy USA ® and Murphy Express, most of which are located in close proximity to Walmart stores, and also has a mix of convenience stores with and without retail gasoline that operate under the name of QuickChek ® . At December 31, 2023, the Company had a total of 1,733 Company stores in 27 states, of which 1,577 were branded as Murphy and 156 were the QuickChek brand. The Company also has certain product supply and wholesale assets, including product distribution terminals and pipeline positions.

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
Significant Accounting Policies	Dec. 31, 2023
Accounting Policies [Abstract]
Significant Accounting Policies	Significant Accounting Policies PRINCIPLES OF CONSOLIDATION – These consolidated financial statements were prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) and include the accounts of Murphy USA Inc. and its subsidiaries for all periods presented. All significant intercompany accounts and transactions within the consolidated financial statements have been eliminated. REVENUE RECOGNITION – Revenue is recognized when obligations under the terms of a contract with our customers are satisfied; generally, this occurs with the transfer of control of our petroleum products, convenience merchandise, Renewable Identification Numbers ("RINs") and other assets to our third-party customers. Revenue is measured as the amounts of consideration we expect to receive in exchange for transferring goods or providing services. Excise and sales tax that we collect where we have determined we are the principal in the transaction have been recorded as revenue on a jurisdiction-by-jurisdiction basis. The Company enters into buy/sell and similar arrangements when petroleum products are held at one location but are needed at a different location. The Company often pays or receives funds related to the buy/sell arrangement based on location or quality differences. The Company accounts for such transactions as non-monetary exchanges under existing accounting guidance and typically reports these on a net basis in its Consolidated Income Statements. See Note 3 "Revenues" for additional information. SHIPPING AND HANDLING COSTS – Costs incurred for the shipping and handling of motor fuel are included in Petroleum product cost of goods sold in the Consolidated Income Statements. Costs incurred for the shipping and handling of convenience store merchandise are included in Merchandise cost of goods sold in the Consolidated Income Statements. TAXES COLLECTED FROM CUSTOMERS AND REMITTED TO GOVERNMENT AUTHORITIES – Excise and other taxes collected on sales of refined products and remitted to governmental agencies are included in operating revenues and operating expenses in the Consolidated Income Statements. Excise taxes on petroleum products collected and remitted were $2.3 billion in 2023, $2.2 billion in 2022, and $2.0 billion in 2021. CASH EQUIVALENTS – Short-term investments, which include government securities, money market funds and other instruments with government securities as collateral, that have a maturity of three months or less from the date of purchase are classified as cash equivalents. MARKETABLE SECURITIES – The Company considers highly liquid treasury notes, corporate debt securities, and other funds with original maturities of more than three months to be marketable securities. Securities with less than one year to maturity are included in short-term marketable securities, and all other securities are classified as long-term marketable securities. Marketable securities are classified as held-to-maturity when the Company has both the positive intent and ability to hold the securities to maturity and are carried at amortized cost. Marketable securities are classified as available-for-sale when the Company does not have the intent to hold securities to maturity to allow flexibility in response to liquidity needs and are carried at fair value. The Company records securities at fair value on its consolidated balance sheets, with unrealized gains and losses reported as a component of accumulated other comprehensive income (loss). See Note 5 "Marketable Securities" and Note 17 "Assets and Liabilities Measured at Fair Value" for additional information on our policy and the fair value measurement of the Company's marketable securities. ACCOUNTS RECEIVABLE – The Company’s accounts receivable are recorded at the invoiced amount and do not bear interest. The accounts receivable primarily consists of amounts owed to the Company from credit card companies and by customers for wholesale sales of refined petroleum products. The allowance for doubtful accounts is the Company’s best estimate of the amount of probable credit losses on these receivables. The Company reviews this allowance for adequacy at least quarterly and bases its assessment on a combination of current information about its customers and historical write-off experience. Any trade accounts receivable balances written off are charged against the allowance for doubtful accounts. The Company has not experienced any significant credit-related losses in the past three years. INVENTORIES – Inventories of petroleum products are valued at the lower of cost, generally applied on a last-in, first-out (“LIFO”) basis, or market. Any increments to LIFO inventory volumes are valued based on the first purchase price for these volumes during the year. Merchandise inventories held for resale are generally valued at average cost. Materials and supplies are valued at the lower of average cost or net realizable value. VENDOR ALLOWANCES AND REBATES – Murphy USA receives payments for vendor allowances, volume rebates and other related payments from various suppliers of its convenience store merchandise. Vendor allowances for price markdowns are credited to merchandise cost of goods sold during the period the related markdown is recognized. Volume rebates of merchandise are recorded as reductions to merchandise cost of goods sold when the merchandise qualifying for the rebate is sold. Slotting and stocking allowances received from a vendor are recorded as a reduction to cost of sales over the period covered by the agreement. BUSINESS COMBINATIONS – The Company accounts for business combinations under the purchase method of accounting. The purchase price of an acquisition is measured as the aggregate of the fair value of the consideration transferred. The purchase price is allocated to the fair values of the tangible and intangible assets acquired and liabilities assumed, with any excess recorded as goodwill. These fair value determinations require judgment and may involve the use of significant estimates and assumptions. The purchase price allocation may be provisional during a measurement period of up to one year to provide reasonable time to obtain the information necessary to identify and measure the assets acquired and liabilities assumed. Any such measurement period adjustments are recognized in the period in which the adjustment amount is determined. Transaction costs associated with the acquisition are expensed as incurred. PROPERTY, PLANT AND EQUIPMENT – Additions to property, plant and equipment, including renewals and betterments, are capitalized and recorded at cost. Certain marketing facilities are primarily depreciated using the composite straight-line method with depreciable lives ranging from 16 to 25 years. Gasoline stores, improvements to gasoline stores and other assets are depreciated over 3 to 50 years by individual unit on the straight-line method. The Company capitalizes interest costs as a component of construction in progress on individually significant projects based on the weighted average interest rates incurred on its long-term borrowings. Total interest cost capitalized was $2.4 million in 2023, $1.1 million in 2022 and $2.1 million in 2021. The Company has undertaken like-kind exchange ("LKE") transactions under the Federal tax code in an effort to acquire and sell real property in a tax efficient manner. The Company generally enters into forward transactions, in which property is sold and the proceeds are reinvested by acquiring similar property; and reverse transactions, in which property is acquired and similar property is subsequently sold. A qualified LKE intermediary is used to facilitate these LKE transactions. Proceeds from forward LKE transactions are held by the intermediary and are classified as restricted cash on the Company's balance sheet because the funds must be reinvested in similar properties. If the acquisition of suitable LKE properties is not completed within 180 days of the sale of the Company-owned property, the proceeds are distributed to the Company by the intermediary and are reclassified as available cash and applicable income taxes are determined. An exchange accommodation titleholder, a type of variable interest entity, is used to facilitate reverse like-kind exchanges. The acquired assets are held by the exchange accommodation titleholder until the exchange transactions are complete. If the Company determines that it is the primary beneficiary of the exchange accommodation titleholder, the replacements assets held by the exchange accommodation titleholder are consolidated and recorded in Property, Plant and Equipment on the Consolidated Balance Sheets. The unspent proceeds that are held in trust with the intermediary are recorded as noncurrent assets in the Consolidated Balance Sheet as the cash was restricted for the acquisition of similar properties. At December 31, 2023 and 2022, the Company had no open LKE transactions with an intermediary. GOODWILL AND INTANGIBLE ASSETS – Goodwill represents the excess of the aggregate of the consideration transferred over the net assets acquired and liabilities assumed and is tested annually for impairment, or more frequently if there are indicators of potential impairment. Acquired finite-lived intangible assets are amortized on a straight-line basis over their estimated useful lives, and are reviewed for impairment when events or circumstances indicate that the asset group to which the intangible assets belong might be impaired. The Company revises the estimated remaining useful life of these assets when events or changes in circumstances warrant a revision. If the Company revises the useful life, the unamortized balance is amortized over the useful life on a prospective basis. See Note 7 "Goodwill and Intangible Assets" for additional information. IMPAIRMENT OF ASSETS – Long-lived assets, which include property and equipment and finite-lived assets, are tested for recoverability whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable. Indefinite-lived intangible assets are tested annually. A long-lived asset is not recoverable if its carrying amount exceeds the sum of the undiscounted cash flows expected to result from its use and eventual disposition. If a long-lived asset is not recoverable, an impairment loss is recognized for the amount by which the carrying amount of the long-lived asset exceeds its fair value, with fair value determined based on discounted estimated net cash flows or other appropriate methods. ASSET RETIREMENT OBLIGATIONS – The Company records a liability for asset retirement obligations (“ARO”) equal to the fair value of the estimated cost to retire an asset. The ARO liability is initially recorded in the period in which the obligation meets the definition of a liability, which is generally when the asset is placed in service. The ARO liability is estimated using existing regulatory requirements and anticipated future inflation rates. When the liability is initially recorded, the Company increases the carrying amount of the related long-lived asset by an amount equal to the original liability. The liability is increased over time to reflect the change in its present value, and the capitalized cost is depreciated over the useful life of the related long-lived asset. The Company reevaluates the adequacy of its recorded ARO liability at least annually. Actual costs of asset retirements such as dismantling service stores and site restoration are charged against the related liability. Any difference between costs incurred upon settlement of an asset retirement obligation and the recorded liability is recognized as a gain or loss in the Company’s Consolidated Income Statements. ENVIRONMENTAL LIABILITIES – A liability for environmental matters is established when it is probable that an environmental obligation exists and the cost can be reasonably estimated. If there is a range of reasonably estimated costs, the most likely amount will be recorded, or if no amount is most likely, the minimum of the range is used. Related expenditures are charged against the liability. Environmental remediation liabilities have not been discounted for the time value of future expected payments. Environmental expenditures that have future economic benefit are capitalized. INCOME TAXES – The Company accounts for income taxes using the asset and liability method. Under this method, income taxes are provided for amounts currently payable and for amounts deferred as tax assets and liabilities based on differences between the financial statement carrying amounts and the tax bases of existing assets and liabilities. Deferred income taxes are measured using the enacted tax rates that are assumed will be in effect when the differences reverse. The Company routinely assesses the realizability of deferred tax assets based on available positive and negative evidence including assumptions of future taxable income, tax planning strategies and other pertinent factors. A deferred tax asset valuation allowance is recorded when evidence indicates that it is more likely than not that all or a portion of these deferred tax assets will not be realized in a future period. The accounting principles for income tax uncertainties permit recognition of income tax benefits only when they are more likely than not to be realized. The Company has elected to classify any interest expense and penalties related to the underpayment of income taxes in Income tax expense in the Consolidated Income Statements. DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES – The fair value of a derivative instrument is recognized as an asset or liability in the Company’s Consolidated Balance Sheets. Upon entering into a derivative contract, the Company may designate the derivative as either a fair value hedge or a cash flow hedge, or decide that the contract is not a hedge, and therefore, recognize changes in the fair value of the contract in earnings. The Company documents the relationship between the derivative instrument designated as a hedge and the hedged items as well as its objective for risk management and strategy for use of the hedging instrument to manage the risk. Derivative instruments designated as fair value or cash flow hedges are linked to specific assets and liabilities or to specific firm commitments or forecasted transactions. The Company assesses at inception and on an ongoing basis whether a derivative instrument accounted for as a hedge is highly effective in offsetting changes in the fair value or cash flows of the hedged item. A derivative that is not a highly effective hedge does not qualify for hedge accounting. The change in the fair value of a qualifying fair value hedge is recorded in earnings along with the gain or loss on the hedged item. The effective portion of the change in the fair value of a qualifying cash flow hedge is recorded in Accumulated other comprehensive income (AOCI) in the consolidated Balance Sheets until the hedged item is recognized currently in earnings. If a derivative instrument no longer qualifies as a cash flow hedge and the underlying forecasted transaction is no longer probable of occurring, hedge accounting is discontinued and the gain or loss recorded in Accumulated other comprehensive income is recognized immediately in earnings. If a hedge is de-designated, hedge accounting will no longer apply and from that time the gain and losses will be recognized in earnings and any accumulated amounts in other comprehensive income will be amortized to earnings over the remaining life of the underlying instrument. See Note 14 "Financial Instruments and Risk Management" and Note 17 "Assets and Liabilities Measured at Fair Value" for further information about the Company’s derivatives. STOCK-BASED COMPENSATION – The fair value of awarded stock options, restricted stock, restricted stock units and performance stock units is determined based on a combination of management assumptions for awards issued. The Company uses the Black-Scholes option pricing model for computing the fair value of stock options. The primary assumptions made by management included the expected life of the stock option award and the expected volatility of the Company’s common stock prices. The Company uses both historical data and current information to support its assumptions. Stock option expense is recognized on a straight-line basis over the requisite service period of three years. The Company uses a Monte Carlo valuation model to determine the fair value of performance-based stock units that are based on performance compared against a peer group and the related expense is recognized over the three-year requisite service period. Management estimates the number of all awards that will not vest and adjusts its compensation expense accordingly. Differences between estimated and actual vested amounts are accounted for as an adjustment to expense when known. See Note 12 "Incentive Plans" for a discussion of the basis of allocation of such costs. USE OF ESTIMATES – In preparing the financial statements of the Company in conformity with U.S. GAAP, management has made a number of estimates and assumptions related to the reporting of assets, liabilities, revenues, and expenses and the disclosure of contingent assets and liabilities. Actual results may differ from

Revenues

Revenues	12 Months Ended
Revenues	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Revenues	Revenues Revenue Recognition The following table disaggregates our revenue by major source for the years ended December 31, 2023, 2022, and 2021. Years Ended December 31, (Millions of dollars) 2023 2022 2021 Marketing Segment Petroleum product sales (at retail) 1 $ 15,279.9 $ 17,198.9 $ 12,022.7 Petroleum product sales (at wholesale) 1 1,824.5 2,031.2 1,388.1 Total petroleum product sales 17,104.4 19,230.1 13,410.8 Merchandise sales 4,089.3 3,903.2 3,677.7 Other operating revenues: RINs 328.6 305.8 265.3 Other revenues 2 6.6 6.3 6.1 Total marketing segment revenues 21,528.9 23,445.4 17,359.9 Corporate and Other Assets 0.5 0.7 0.6 Total revenues $ 21,529.4 $ 23,446.1 $ 17,360.5 1 Includes excise and sales taxes that remain eligible for inclusion under Topic 606 2 Primarily includes collection allowance on excise and sales taxes combined with other miscellaneous items Marketing segment Petroleum product sales (at retail). For our retail store locations, the revenue related to petroleum product sales is recognized as the fuel is pumped to our customers. The transaction price at the pump typically includes some portion of sales or excise taxes as levied in the respective jurisdictions. Those taxes that are collected for remittance to governmental entities on a pass through basis are not recognized as revenue and they are recorded to a liability account until they are paid. Our customers typically use a mixture of cash, checks, credit cards and debit cards to pay for our products as they are received. We have accounts receivable from the various credit/debit card providers at any point in time related to product sales made on credit cards and debit cards. These receivables are typically collected in two Petroleum product sales (at wholesale). Our sales of petroleum products at wholesale are generally recorded as revenue when the deliveries have occurred and legal ownership of the product has transferred to the customer. Title transfer for bulk refined product sales typically occurs at pipeline custody points and upon trucks loading at product terminals. For bulk pipeline sales, we record receivables from customers that are generally collected within a week from custody transfer date. For our rack product sales, the majority of our customers' accounts are drafted by us within 10 days from product transfer. Merchandise sales. For our retail store locations, the revenue related to merchandise sales is recognized as the customer completes their purchase at our locations. The transaction price typically includes some portion of sales tax as levied in the respective jurisdictions. Those taxes that are collected for remittance to governmental entities on a pass through basis are not recognized as revenue and they are recorded to a liability account until they are paid. As noted above, a mixture of payment types are used for these revenues and the same terms for credit/debit card receivables are realized. With respect to merchandise sales revenue we must determine whether we are the principal or agent for some categories of merchandise such as scratch-off lottery tickets, lotto tickets, newspapers and other small categories of merchandise. For scratch-off lottery tickets, we have determined we are the principal in the majority of the jurisdictions and therefore we record those sales on a gross basis. We have some categories of merchandise (such as lotto tickets) where we are the agent and the revenues recorded for those transactions are our net commission only. The Company offers loyalty programs through each of its branded retail locations. The customers earn rewards based on their spending or other promotional activities. These programs create a performance obligation which requires us to defer a portion of sales revenue to the loyalty program participants until they redeem their rewards. The rewards may be redeemed for free or discounted merchandise or cash discounts at all stores and on fuel purchases at Murphy branded stores. Earned rewards expire after an account is inactive for a period of 90 days at Murphy branded stores, while certain QuickChek rewards require use within the month. We recognize loyalty revenue when a customer redeems an earned reward. Deferred revenue associated with both rewards programs are included in Trade accounts payable and accrued liabilities in our Consolidated Balance Sheet. The deferred revenue balances at December 31, 2023 and 2022 were immaterial. RINs sales. For the sale of RINs, we recognize revenue when the RIN is transferred to the counter-party and the sale is completed. Receivables from our counter-parties related to the RIN sales are typically collected within five days of the sale. Other revenues. Items reported as other operating revenues include collection allowances for excise and sales tax and other miscellaneous items and are recognized as revenue when the transaction is completed. Accounts receivable

Inventories

Inventories	12 Months Ended
Inventories	Dec. 31, 2023
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories consisted of the following: December 31, (Millions of dollars) 2023 2022 Petroleum products - FIFO basis $ 331.2 $ 367.0 Store merchandise for resale - FIFO basis 209.1 192.1 Less LIFO reserve (212.1) (250.7) Total petroleum products and store merchandise inventory 328.2 308.4 Materials and supplies 13.0 10.7 Total inventories $ 341.2 $ 319.1 At December 31, 2023 and 2022, the replacement cost (market value) of LIFO inventories exceeded the LIFO carrying value for petroleum products by $209.7 million and $249.1 million, respectively, and store merchandise for resale by $2.4 million and $1.6 million, respectively.

Marketable Securities

Marketable Securities	12 Months Ended
Marketable Securities	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Marketable Securities	Marketable Securities The Company invests a portion of its excess operational cash in marketable securities. The goal of the Company's investment policy, in order of priority, are as follows: (1) preservation of principal, (2) maintaining a high degree of liquidity to meet cash flow requirements, and (3) deliver competitive returns subject to prevailing market conditions and the Company's stated objectives related to safety and liquidity. Nothing in the policy is intended to indicate that management must invest excess operational cash; it merely allows it subject to specific limitations. Securities are generally required to have a final maturity of 24 months or less with a weighted average maturity for the portfolio of no longer than 12 months and must have an active secondary market. Investments may include U.S. Treasury bills, notes and bonds, U.S. Agency securities, repurchase agreements, certificates of deposit, institutional, government money market funds that maintain a stable $1.00 net asset value, domestic and foreign commercial paper, municipal securities, domestic and foreign debt issued by corporations or financial institutions with the primary objective of minimizing the potential risk of principal loss. The Company determines the classification of its marketable securities based on its investment strategy at the time of purchase. All marketable securities in the periods presented have been classified as available-for-sale. The amortized cost and carrying value (fair value) of marketable securities and the balance sheet location at December 31, 2023 and December 31, 2022 consist of the following: December 31, 2023 (Millions of dollars) Amortized Gross Gross Estimated Available-for-sale securities: Marketable securities current U.S. Government bonds $ 3.0 — — $ 3.0 U.S. Corporate bonds 3.9 — — 3.9 Investment income receivable 0.2 — — 0.2 7.1 — — 7.1 Marketable securities non-current U.S. Corporate bonds 2.9 — — 2.9 Non U.S. Corporate bonds 1.5 — — 1.5 4.4 — — 4.4 Total marketable securities $ 11.5 $ — $ — $ 11.5 December 31, 2022 (Millions of dollars) Amortized Gross Gross Estimated Available-for-sale securities: Marketable securities current U.S. Government bonds $ 8.8 — — $ 8.8 U.S. Corporate bonds 6.0 — — 6.0 Non U.S. Corporate bonds 3.0 — — 3.0 Investment income receivable 0.1 — — 0.1 17.9 — — 17.9 Marketable securities non-current U.S. Corporate bonds 4.4 — — 4.4 Total marketable securities $ 22.3 $ — $ — $ 22.3 The amortized cost basis and fair value of the Company's available-for-sale marketable securities at December 31, 2023, by contractual maturity, are as follows: (Millions of dollars) Amortized Cost Fair Value Less than 1 year $ 11.4 $ 11.4 1 to 2 years — — Total $ 11.4 $ 11.4 There was no impairment on any available-for-sale marketable securities as of December 31, 2023 or December 31, 2022.

Property, Plant and Equipment

Property, Plant and Equipment	12 Months Ended
Property, Plant and Equipment	Dec. 31, 2023
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Property, Plant and Equipment December 31, 2023 December 31, 2022 (Millions of dollars) Estimated Useful Life Cost Net Cost Net Land $ 655.7 $ 655.7 $ 645.2 $ 645.2 Real estate finance leases 1 to 40 years 149.2 110.9 147.7 122.2 Pipeline and terminal facilities 16 to 25 years 93.8 49.9 83.7 42.5 Retail gasoline stores 3 to 50 years 3,136.3 1,623.7 2,897.7 1,536.4 Buildings 20 to 45 years 74.9 46.7 71.0 47.2 Other 3 to 20 years 201.1 84.9 167.1 65.8 $ 4,311.0 $ 2,571.8 $ 4,012.4 $ 2,459.3 Depreciation expense of $227.7 million, $219.4 million and $211.6 million was recorded for the years ended December 31, 2023, 2022 and 2021, respectively.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
Goodwill and Intangible Assets	Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets The Company's goodwill is assigned to its Marketing segment and none of the goodwill is deductible for tax purposes. December 31, (Millions of dollars) 2023 2022 Goodwill $ 328.0 $ 328.0 We amortize intangible assets subject to amortization on a straight-line basis based on the period for which the economic benefits of the asset or liability are expected to be realized. The intangible assets subject to amortization includes pipeline space, which is being amortized over a 40-year life, and the intangible lease liability acquired from QuickChek which is being amortized over the remaining life of the underlying leases. Intangible assets subject to amortization at December 31, 2023 and 2022 consisted of the following: Remaining Useful Life (in years) December 31, 2023 December 31, 2022 (Millions of dollars) Cost Net Cost Net Intangible assets subject to amortization: Pipeline space 31.7 $ 39.6 $ 31.7 $ 39.6 $ 32.7 Intangible lease liability 10.4 (9.1) (7.3) (9.1) (7.9) Remaining Useful Life (in years) December 31, 2023 December 31, 2022 (Millions of dollars) Cost Net Cost Net Total intangible assets subject to amortization 30.5 24.4 30.5 24.8 Intangible assets not subject to amortization, indefinite lives: Trade name 115.4 115.4 115.4 115.4 Liquor licenses — — 0.2 0.2 Total intangible assets not subject to amortization 115.4 115.4 115.6 115.6 Intangible assets, net of amortization $ 145.9 $ 139.8 $ 146.1 $ 140.4

Accounts Payable and Accrued Li

Accounts Payable and Accrued Liabilities	12 Months Ended
Accounts Payable and Accrued Liabilities	Dec. 31, 2023
Payables and Accruals [Abstract]
Accounts Payable and Accrued Liabilities	Accounts Payable and Accrued Liabilities Trade accounts payable and accrued liabilities consisted of the following: December 31, (Millions of dollars) 2023 2022 Trade accounts payable $ 520.3 $ 547.6 Excise taxes/withholdings payable 108.5 93.2 Accrued insurance obligations 55.9 51.8 Accrued taxes other than income 43.4 44.6 Accrued compensation and benefits 50.1 46.6 Current operating lease liabilities 22.1 20.5 Other 34.4 34.9 Accounts payable and accrued liabilities $ 834.7 $ 839.2

Long-Term Debt

Long-Term Debt	12 Months Ended
Long-Term Debt	Dec. 31, 2023
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt Long-term debt consisted of the following: December 31, (Millions of dollars) 2023 2022 5.625% senior notes due 2027 (net of unamortized discount of $1.3 at 2023 and $1.6 at 2022) $ 298.7 $ 298.4 4.75% senior notes due 2029 (net of unamortized discount of $3.6 at 2023 and $4.2 at 2022) 496.4 495.8 3.75% senior notes due 2031 (net of unamortized discount of $4.4 at 2023 and $5.1 at 2022) 495.6 494.9 Term loan due 2028 (effective interest rate of 7.23% at 2023 and 5.95% at 2022) net of unamortized discount of $0.6 at 2023 and $0.7 at 2022 389.4 393.3 Capitalized lease obligations, autos and equipment, due through 2027 3.1 2.3 Capitalized lease obligations, buildings, due through 2059 123.6 131.3 Unamortized debt issuance costs (7.1) (9.1) Total long-term debt 1,799.7 1,806.9 Less current maturities 15.0 15.0 Total long-term debt, net of current $ 1,784.7 $ 1,791.9 Senior Notes On April 25, 2017, Murphy Oil USA, Inc. ("MOUSA"), our primary operating subsidiary, issued $300 million of 5.625% Senior Notes due 2027 (the "2027 Senior Notes") under its existing shelf registration statement. The 2027 Senior Notes are fully and unconditionally guaranteed by the Company and by the Company's subsidiaries that guarantee our Credit Facilities (as defined below). The indenture governing the 2027 Senior Notes contains restrictive covenants that limit, among other things, the ability of the Company, MOUSA, and the restricted subsidiaries to incur additional indebtedness or liens, dispose of assets, make certain restricted payments or investments, enter into transactions with affiliates or merge with or into other entities. On September 13, 2019, MOUSA, issued $500 million of 4.75% Senior Notes due 2029 (the “2029 Senior Notes”). The net proceeds from the issuance of the 2029 Senior Notes were used to fund, in part, the tender offer and redemption of a prior note issuance. The 2029 Senior Notes are fully and unconditionally guaranteed by the Company and by the Company's 100% owned subsidiaries that guarantee our Credit Facilities. The indenture governing the 2029 Senior Notes contains restrictive covenants that are essentially identical to the covenants for the 2027 Senior Notes. On January 29, 2021, MOUSA issued $500 million of 3.75% Senior Notes due 2031 (the "2031 Senior Notes" and, together with the 2027 Senior Notes and the 2029 Senior Notes, the "Senior Notes"). The net proceeds from the issuance of the 2031 Senior Notes were used, in part, to fund the acquisition of QuickChek and other obligations related to that transaction. The 2031 Senior Notes are fully and unconditionally guaranteed by the Company and by the Company's subsidiaries that guarantee our Credit Facilities. The indenture governing the 2031 Senior Notes contains restrictive covenants that are essentially identical to the covenants for the 2027 and 2029 Senior Notes. The Senior Notes and related guarantees rank equally with all of our and the guarantors’ existing and future senior unsecured indebtedness and effectively junior to our and the guarantors’ existing and future secured indebtedness (including indebtedness with respect to the Credit Facilities) to the extent of the value of the assets securing such indebtedness. The Senior Notes are structurally subordinated to all of the existing and future third-party liabilities, including trade payables, of our existing and future subsidiaries that do not guarantee the notes. Revolving Credit Facility and Term Loan Our credit agreement consists of both a cash flow revolving credit facility and a senior secured term loan. The credit agreement provides for a senior secured term loan in an aggregate principal amount of $400 million (the “Term Facility”) (which was borrowed in full on January 29, 2021) and revolving credit commitments in an aggregate amount equal to $350 million (the “Revolving Facility”, and together with the Term Facility, the “Credit Facilities”). The outstanding balance of the term loan was $390 million at December 31, 2023 and $394 million at December 31, 2022. The term loan is due January 2028, and we are required to make quarterly principal payments of $1 million, which began on July 1, 2021. As of December 31, 2023, we had no outstanding borrowings under the Revolving Facility and had $6.2 million in outstanding letters of credit (which reduces the amount available to borrow under the Revolving Facility). Interest payable on the Term Facility is based on either: • the term overnight financing rate, plus the applicable Alternative Reference Rate Committee ("ARRC") recommended credit spread adjustment (the “Adjusted Term SOFR Rate”); or • the Alternate Base Rate, which is defined as the highest of (a) the rate of interest last quoted by The Wall Street Journal as the “Prime Rate”, (b) the greater of federal funds effective rate and the overnight bank funding rate determined by the Federal Reserve Bank of New York from time to time plus 0.50% per annum and (c) the one-month Adjusted Term SOFR Rate plus 1.00% per annum, plus, (A) in the case of Adjusted Term SOFR Rate borrowings, a spread of 1.75% per annum and (B) in the case of Alternate Base Rate borrowings, a spread of 0.75% per annum. Interest payable on the Revolving Facility is based on either: • the term secured overnight financing rate, plus 0.10% credit spread adjustment for all interest periods (the "Adjusted SOFR Rate"), which is subject to a 0.0% floor; or • the Alternate Base Rate, which is defined as the highest of (a) the rate of interest last quoted by The Wall Street Journal as the "Prime Rate", (b) the greater of the federal funds effective rate and the overnight bank funding rate determined by the Federal Reserve Bank of New York from time to time plus 0.50% per annum and (c) the one-month Adjusted SOFR Rate plus 1.00% per annum, plus, (A) in the case of Adjusted SOFR Rate borrowings, a spread of 1.75% to 2.25% per annum depending on a total debt to EBITDA ratio and (B) in the case of Alternate Base Rate borrowings, spreads ranging from 0.75% to 1.25% per annum depending on a total debt to EBITDA ratio. The Term Facility amortizes in quarterly installments, which commenced on July 1, 2021, at a rate of 1.00% per annum. Murphy USA is also required to prepay the Term Facility with a portion of its excess cash flow, a portion of the net cash proceeds of certain asset sales and casualty events (subject to certain reinvestment rights) and the net cash proceeds of issuances of indebtedness not permitted under the Credit Agreement. The credit agreement allows Murphy USA to prepay, in whole or in part, the Term Facility outstanding thereunder, together with any accrued and unpaid interest, with prior notice but without premium or penalty other than breakage and redeployment costs. The credit agreement contains certain covenants that limit, among other things, the ability of the Company and certain of its subsidiaries to incur additional indebtedness or liens, to make certain investments, to enter into sale-leaseback transactions, to make certain restricted payments, to enter into consolidations, mergers or sales of material assets and other fundamental changes, to transact with affiliates, to enter into agreements restricting the ability of subsidiaries to incur liens or pay dividends, or to make certain accounting changes. The Revolving Facility credit agreement also impose total leverage ratio and secured net leverage ratio financial maintenance covenants which are tested quarterly. Pursuant to the total leverage ratio financial maintenance covenant, the Company must maintain a total leverage ratio of not more than 5.0 to 1.0 with an ability in certain circumstances to temporarily increase that limit to 5.5 to 1.0 and a maximum secured net leverage ratio of not more than 3.75 to 1.0 with an ability in certain circumstances to temporarily increase that limit to 4.25 to 1.0. The Credit Agreement also contains customary events of default. Pursuant to the credit agreement's covenant limiting certain restricted payments, certain payments in respect of our equity interests, including dividends, when the total leverage ratio, calculated on a pro forma basis, is greater than 3.0 to 1.0, could be limited. At December 31, 2023, our total leverage ratio was 1.68 to 1.0 which meant our ability at that date to make restricted payments was not limited. If our total leverage ratio, on a pro forma basis, exceeds 3.0 to 1.0, any restricted payments made following that time until the ratio is once again, on a pro forma basis, below 3.0 to 1.0 would be limited by the covenant, which contains certain exceptions, including an ability to make restricted payments in cash in an aggregate not to exceed the greater of $115.6 million or 4.50% of consolidated net tangible assets over the life of the credit agreement. All obligations under the credit agreement are guaranteed by Murphy USA and the subsidiary guarantors party thereto, and all obligations under the credit agreement, including the guarantees of those obligations, are secured by certain assets of Murphy USA, Murphy Oil USA, Inc. and the guarantors party to the guarantee and collateral agreement in respect thereof.

Asset Retirement Obligations (A

Asset Retirement Obligations (ARO)	12 Months Ended
Asset Retirement Obligations (ARO)	Dec. 31, 2023
Asset Retirement Obligation Disclosure [Abstract]
Asset Retirement Obligations (ARO)	Asset Retirement Obligations (ARO) The majority of the ARO recognized by the Company at December 31, 2023 and 2022 is related to the estimated costs to dismantle and abandon certain of its retail gasoline stores. The Company has not recorded an ARO for certain of its marketing assets because sufficient information is presently not available to estimate a range of potential settlement dates for the obligation. These assets are consistently being upgraded and are expected to be operational into the foreseeable future. In these cases, the obligation will be initially recognized in the period in which sufficient information exists to estimate the obligation. A reconciliation of the beginning and ending aggregate carrying amount of the ARO is shown in the following table: December 31, (Millions of dollars) 2023 2022 Balance at beginning of period $ 43.3 $ 39.2 Accretion expense 3.0 2.7 Settlement of liabilities (3.1) (2.3) Liabilities incurred 2.9 3.7 Balance at end of period $ 46.1 $ 43.3 The estimation of future ARO is based on a number of assumptions requiring professional judgment. The Company cannot predict the type of revisions to these assumptions that may be required in future periods due to the lack of availability of additional information.

Income Taxes

Income Taxes	12 Months Ended
Income Taxes	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The components of income before income taxes for each of the three years ended December 31, 2023 and income tax expense (benefit) attributable thereto were as follows: Years Ended December 31, (Millions of dollars) 2023 2022 2021 Income (loss) before income taxes $ 734.4 $ 883.8 $ 521.9 Income tax expense (benefit) Federal - Current $ 141.5 $ 143.5 $ 86.2 Federal - Deferred 3.5 33.0 14.4 State - Current and deferred 32.6 34.4 24.4 Total $ 177.6 $ 210.9 $ 125.0 The following table reconciles income taxes based on the U.S. statutory tax rate to the Company’s income tax expense (benefit). Years Ended December 31, (Millions of dollars) 2023 2022 2021 Income tax expense based on the U.S. statutory tax rate $ 154.2 $ 185.6 $ 109.6 State income taxes, net of federal benefit 25.0 28.0 19.2 Federal credits (2.6) (2.9) (2.2) Other, net 1.0 0.2 (1.6) Total $ 177.6 $ 210.9 $ 125.0 An analysis of the Company’s deferred tax assets and deferred tax liabilities at December 31, 2023 and 2022 showing the tax effects of significant temporary differences is as follows: December 31, (Millions of dollars) 2023 2022 Deferred tax assets Property costs and asset retirement obligations $ 6.4 $ 5.9 Employee benefits 12.9 10.7 Operating leases liability 99.2 97.6 Other deferred tax assets 13.5 13.6 Total gross deferred tax assets 132.0 127.8 Deferred tax liabilities Accumulated depreciation and amortization (327.9) (316.0) State deferred taxes (29.4) (30.5) Operating leases right of use assets (94.9) (94.4) Other deferred tax liabilities (9.3) (14.3) Total gross deferred tax liabilities (461.5) (455.2) Net deferred tax liabilities $ (329.5) $ (327.4) In management’s judgment, the deferred tax assets in the preceding table will more likely than not be realized as reductions of future taxable income or utilized by available tax planning strategies. As of December 31, 2023, the earliest year remaining open for Federal audits and/or settlement is 2020 and for state audits and/or settlement is 2019. Although the Company believes that recorded liabilities for unsettled issues are adequate, additional gains or losses could occur in future periods from resolution of outstanding unsettled matters. The FASB’s rules for accounting for income tax uncertainties clarify the criteria for recognizing uncertain income tax benefits and require additional disclosures about uncertain tax positions. Under U.S. GAAP the financial statement recognition of the benefit for a tax position is dependent upon the benefit being more likely than not to be sustainable upon audit by the applicable taxing authority. If this threshold is met, the tax benefit is then measured and recognized at the largest amount that is greater than 50 percent likely of being realized upon ultimate settlement. Liabilities associated with uncertain income tax positions are included in Deferred Credits and Other Liabilities in the Consolidated Balance Sheets. A reconciliation of the beginning and ending amount of the consolidated liability for unrecognized income tax benefits during the year ended December 31, 2023 and 2022 is shown in the following table: Year Ended December 31, (Millions of dollars) 2023 2022 Balance at January 1 $ 0.6 $ 0.5 Additions for tax positions related to prior years — 0.2 Expiration of statutes of limitation (0.1) (0.1) Balance at December 31 $ 0.5 $ 0.6 All additions or reductions to the above liability affect the Company’s effective tax rate in the respective period of change. The Company accounts for any applicable interest and penalties on uncertain tax positions as a component of income tax expense. Income tax expense for the years ended December 31, 2023, 2022 and 2021 included immaterial amounts of interest and penalties, associated with uncertain tax positions. Of these amounts shown in the table, $0.4 million and $0.5 million represent the amount of unrecognized tax benefits that, if recognized, would impact our effective tax rate for the years ended December 31, 2023 and 2022, respectively. During the next twelve months, the Company does not expect a material change to the liability for uncertain taxes. Although existing liabilities could be reduced by settlement with taxing authorities or lapse due to statute of limitations, the Company believes that the changes in its unrecognized tax benefits due to these events will not have a material impact on the Consolidated Income Statement during 2024.

Incentive Plans

Incentive Plans	12 Months Ended
Incentive Plans	Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]
Incentive Plans	Incentive Plans 2013 Long-Term Incentive Plan Effective August 30, 2013, certain of our employees began to participate in the Murphy USA 2013 Long-Term Incentive Plan, which was subsequently amended and restated effective as of February 8, 2017 (the “MUSA 2013 Plan”). The MUSA 2013 Plan authorized the Executive Compensation Committee of our Board of Directors (“the Committee”) to grant non-qualified or incentive stock options, stock appreciation rights, stock awards (including restricted stock and restricted stock unit awards), dividend equivalent units, cash awards, and performance awards to our employees. No more than 5.5 million shares of common stock were to be delivered under the MUSA 2013 Plan and no more than 1.0 million shares of common stock were to be awarded to any one employee, subject to adjustment for changes in capitalization. The maximum cash amount payable pursuant to any “performance-based” award to any participant in any calendar year was $5.0 million. During the period from August 30, 2013 to December 31, 2023, the Company granted a total of 2,995,854 awards from the MUSA 2013 Plan which leaves 2,504,146 remaining shares (after consideration of the amendments made to the MUSA 2013 Plan in February 2014 by the Board of Directors). Any remaining shares to be granted under this plan will be in the form of dividend equivalent units on outstanding nonvested shares until the time when all shares are completely vested. At present, the Company expects to issue all shares that vest out of existing treasury shares rather than issuing new common shares. On May 4, 2023, the 2023 Omnibus Incentive Compensation Plan (the "MUSA 2023 Plan") was approved by shareholders and became effective for all future grants for both employees and directors, as described later in the footnote. Beginning with its initial quarterly dividend in December 2020, the Company issues dividend equivalent units ("DEU") on all outstanding, unvested equity awards (except stock options) in an amount commensurate with regular quarterly dividends paid on common stock. The terms of the DEU mirror the underlying awards and will only vest if the related award vests. DEU's issued are included with grants in each respective table as applicable. STOCK OPTIONS (MUSA 2013 Plan) – The Committee fixes the option price of each option granted at no less than fair market value (FMV) on the date of the grant and fixes the option term at no more than 7 years from such date. Most of the nonqualified stock options granted in 2023 to certain employees by the Committee were granted in February 2023. Following are the assumptions used by the Company to value the original awards: Years Ended December 31, 2023 2022 2021 Fair value per option grant $ 88.53 $ 51.46 $ 32.00 Assumptions Dividend yield 0.5 % 0.6 % 0.8 % Expected volatility 33.1 % 32.2 % 32.3 % Risk-free interest rate 3.8 % 1.8 % 0.4 % Expected life (years) 4.9 4.7 4.6 Stock price at valuation date $ 263.48 $ 181.18 $ 126.00 Changes in options outstanding for Company employees during the period from December 31, 2022 to December 31, 2023 are presented in the following table: 2013 Plan — Options Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (Years) Aggregate Intrinsic Value (Millions of Dollars) Outstanding at December 31, 2022 313,950 112.06 Granted 38,100 263.48 Exercised (61,000) 77.72 Outstanding at December 31, 2023 291,050 $ 139.07 3.9 $ 63.3 Exercisable at December 31, 2023 160,550 $ 97.72 2.9 $ 41.6 Additional information about stock options outstanding at December 31, 2023 is shown below: Options Outstanding Options Exercisable Range of Exercise Prices per Option No. of Options Avg. Life Remaining in Years No. of Options Avg. Life Remaining in Years $0.00 to $99.99 68,900 2.0 68,900 2.0 $100.00 to $149.99 128,900 3.7 91,650 3.5 $150.00 to $249.99 55,150 5.1 — — $250.00 to $300.00 38,100 6.1 — — 291,050 3.9 160,550 2.9 RESTRICTED STOCK UNITS (MUSA 2013 Plan) – The Committee has granted time based restricted stock units (RSUs) as part of the compensation plan for its executives and certain other employees since its inception. The awards granted in the current year were under the MUSA 2013 Plan, are valued at the grant date fair value, and vest over three years. Changes in restricted stock units outstanding for Company employees during the period from December 31, 2022 to December 31, 2023 are presented in the following table: 2013 Plan — Employee RSUs Number of units Weighted Average Grant Date Fair Value Total Fair Value (Millions of Dollars) Outstanding at December 31, 2022 149,366 $ 125.51 Granted 34,935 $ 260.96 Vested and issued (60,888) $ 80.23 $ 16.1 Forfeited (4,157) $ 183.17 Outstanding at December 31, 2023 119,256 $ 186.47 $ 42.5 PERFORMANCE-BASED RESTRICTED STOCK UNITS (MUSA 2013 Plan) – In February 2023, the Committee awarded performance-based restricted stock units (performance units) to certain employees. Half of the performance units vest based on a three-year return on average capital employed (ROACE) calculation and the other half vest based on a three-year total shareholder return (TSR) calculation that compares MUSA to a group of 17 peer companies. The portion of the awards that vest based on TSR qualify as a market condition and must be valued using a Monte Carlo valuation model. For the TSR portion of the awards, the fair value was determined to be $330.18 per unit. For the ROACE portion of the awards, the valuation was based on the grant date fair value of $263.48 per unit and the number of awards will be periodically assessed to determine the probability of vesting. Changes in performance-based restricted stock units outstanding for Company employees during the period from December 31, 2022 to December 31, 2023 are presented in the following table: 2013 Plan — Employee PSU's Number of Units Weighted Average Grant Date Fair Value Total Fair Value (Millions of Dollars) Outstanding at December 31, 2022 106,001 $ 160.03 Granted 62,380 $ 296.83 Vested and issued (72,799) $ 121.83 $ 19.0 Outstanding at December 31, 2023 95,582 $ 212.38 $ 34.1 2013 Stock Plan for Non-employee Directors Effective August 8, 2013, Murphy USA adopted the 2013 Murphy USA Stock Plan for Non-employee Directors (the “Directors Plan”). The directors for Murphy USA are compensated with a mixture of cash payments and equity-based awards. Awards under the Directors Plan may be in the form of restricted stock, restricted stock units, dividend equivalent units, stock options, or a combination thereof. An aggregate of 500,000 shares of common stock shall be available for issuance of grants under the Directors Plan. Since 2013, 157,285 time-based restricted stock units have been granted under the terms of the Directors Plan which leaves 342,715 shares available to be granted in the future. RESTRICTED STOCK UNITS (Directors Plan) – The Committee has also granted time based RSUs to the non-employee directors of the Company as part of their overall compensation package for being a member of the Board of Directors. Awards prior to 2023 vest at the end of three years and those granted in 2023 vest at the end of one year. DEFERRED STOCK UNITS (2013 Directors Plan) — Effective January 1, 2023, non-employee directors can elect to receive their annual cash retainers in the form of Deferred Stock Units ("DSUs"). The DSUs are recognized at their fair value on the date of the grant. Director fees which are deferred into DSUs are calculated and expensed each quarter by taking fees earned during the quarter and dividing by the closing price of our common stock on the last trading day of the quarter. Each DSU represents the right to receive one share of common stock following the completion of a director's service. In addition, beginning with the 2023 annual equity grants to non-employee directors, the directors may elect to defer receipt of their vested RSUs until their service ends. These RSUs are included in the Director RSU table below, will vest in one year, and will thereafter become deferred stock units. Changes in restricted stock units outstanding for Company non-employee directors during the period from December 31, 2022 to December 31, 2023 are presented in the following table: 2013 Plan — Director RSUs and DSUs Number of Units Weighted Average Grant Date Fair Value Total Fair Value (Millions of Dollars) Outstanding at December 31, 2022 26,923 $ 132.38 Granted 6,611 $ 258.35 Vested and issued (9,880) $ 110.19 $ 2.7 Outstanding at December 31, 2023, including DSUs 23,654 $ 180.97 $ 8.4 During the three-month period ended March 31, 2023, we granted 421 DSUs and recorded director expense of $0.1 million related to the grants under the 2013 Plan. Two DEU shares were granted and vested on these DSUs during the year. At December 31, 2023 there were 423 Director DSUs outstanding with an average grant date fair value of $258.35 under the 2013 Plan. 2023 Omnibus Incentive Compensation Plan On May 4, 2023, the MUSA 2023 Plan became effective upon the approval of the Company's stockholders. The MUSA 2023 Plan has been established to replace, on a prospective basis, the MUSA 2013 Plan and the 2013 Directors Plan, each of which expired on August 8, 2023. The MUSA 2023 Plan authorizes the Executive Compensation Committee of our Board of Directors (“the Committee”) to grant to non-employee directors, employees, and consultants of the Company, or any of its subsidiaries, stock options (incentive stock options ("ISOs") and nonqualified stock options ("NQSO")), stock appreciation rights ("SARs"), restricted stock, restricted stock units ("RSUs"), performance awards or other cash-based awards and other stock-based awards. The maximum number of shares available for issuance under the MUSA 2023 Plan shall not exceed in the aggregate 1,725,000 shares (subject to certain adjustments). During the period from May 4, 2023 to December 31, 2023, the Company granted a total of 1,544 awards from the MUSA 2023 Plan which leaves 1,723,456 remaining shares. At present, the Company expects to issue all shares that vest out of existing treasury shares rather than issuing new common shares. DEFERRED STOCK UNITS — Non-employee directors can elect to receive their annual cash retainers in the form of DSUs. The DSUs are recognized at their fair value on the date of the grant. Director fees which are deferred into DSUs are calculated and expensed each quarter by taking fees earned during the quarter and dividing by the closing price of our common stock on the last trading day of the quarter. Each DSU represents the right to receive one share of common stock following the completion of a director's service. Changes in restricted stock units outstanding for Company 2023 Plan during the period from December 31, 2022 to December 31, 2023 are presented in the following table: 2023 Plan — RSUs and Director DSUs Number of Units Weighted Average Grant Date Fair Value Total Fair Value (Millions of Dollars) Outstanding at December 31, 2022 — $ — Granted 1,544 $ 335.69 Outstanding at December 31, 2023, including DSUs 1,544 $ 335.69 $ 0.6 During the period ended December 31, 2023, we granted 1,003 DSUs and recorded director expense of $0.3 million related to the grants. At December 31, 2023, there were 1,004 Director DSUs vested and outstanding with an average grant date fair value of $335.18 under the MUSA 2023 Plan. Amounts recognized in the financial statements by the Company with respect to all share-based plans are shown in the following table: Years Ended December 31, (Millions of dollars) 2023 2022 2021 Compensation charged against income before income tax benefit $ 21.8 $ 16.0 $ 14.4 Related income tax benefit recognized in income $ 4.6 $ 3.4 $ 3.0

Employee and Retiree Benefit Pl

Employee and Retiree Benefit Plans	12 Months Ended
Employee and Retiree Benefit Plans	Dec. 31, 2023
Retirement Benefits [Abstract]
Employee and Retiree Benefit Plans	Employee and Retiree Benefit Plans THRIFT PLAN – Employees of the Company may participate in defined contribution savings plans by contributing up to a specified percentage of their base pay. The Company matches contributions for Murphy USA eligible employees at 100% of each employee’s contribution with a maximum match of 6%. In addition, the Company makes profit sharing contributions on an annual basis for Murphy USA employees. Eligible employees receive a stated percentage of their base and incentive pay of which can range from 3% to 9% based on participant's age, years of service, date of hire, subsidiary organization, or role. The Company maintained the thrift plan of QuickChek on acquisition and matched 100% of the first 3% and 50% of the next 2% contributed by eligible employees in 2021 and 2022. Beginning in 2023, the QuickChek Corporation 401(k) Retirement and Savings Plan and the Murphy Profit Sharing Plan were merged into the Murphy USA Savings Plan. The Company’s combined expenses related to these plans were $23.8 million in 2023, $17.3 million in 2022 and $16.9 million in 2021. In addition, prior to 2023, eligible part-time employees participated in a noncontributory profit sharing plan in which the Company could make discretionary employer contributions. The Company's expenses related to this plan were $1.6 million in 2022 and $1.1 million in 2021. SUPPLEMENTAL EXECUTIVE RETIREMENT –

Financial Instruments and Risk

Financial Instruments and Risk Management	12 Months Ended
Financial Instruments and Risk Management	Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Financial Instruments and Risk Management	Financial Instruments and Risk Management DERIVATIVE INSTRUMENTS — The Company makes limited use of derivative instruments to manage certain risks related to commodity prices and interest rates. The use of derivative instruments for risk management is covered by operating policies and is closely monitored by the Company’s senior management. The Company does not hold any derivatives for speculative purposes, and it does not use derivatives with leveraged or complex features. Derivative instruments are traded primarily with creditworthy major financial institutions or over national exchanges such as the New York Mercantile Exchange (“NYMEX”). For accounting purposes, the Company has not designated commodity derivative contracts as hedges, and therefore, it recognizes all gains and losses on these derivative contracts in its Consolidated Statement of Income. Certain interest rate derivative contracts were accounted for as hedges and gain or loss associated with recording the fair value of these contracts was deferred in AOCI until the anticipated transactions occur. As of December 31, 2023, all current commodity derivative activity is immaterial. There were $1.0 million in cash deposits at December 31, 2023 and none at December 31, 2022 related to commodity derivative contracts reported in Prepaid expenses and other current assets in the Consolidated Balance Sheets. These cash deposits have not been used to increase the reported net assets or reduce the reported net liabilities on the derivative contracts at December 31, 2023 and 2022. Interest Rate Risks An interest rate derivative that the Company used to effect the hedge entered into in August 2019 matured during the year 2023. The amount of pre-tax gains in accumulated other comprehensive loss that was reclassified into interest expense was $0.6 million, $0.9 million and $0.9 million for the three years ended December 31, 2023, 2022 and 2021, respectively.

Earnings Per Share

Earnings Per Share	12 Months Ended
Earnings Per Share	Dec. 31, 2023
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share Basic earnings per common share is computed by dividing net income available to common stockholders by the weighted average of common shares outstanding during the period. Diluted earnings per common share adjusts basic earnings per common share for the effects of stock options and restricted stock in the periods where such items are dilutive. On December 1, 2021, the Board of Directors approved a share repurchase authorization of up to $1 billion to begin upon completion of the $500 million authorization made in October 2020. The 2021 authorization was completed in October 2023. On May 2, 2023, the Board of Directors approved a new share repurchase authorization of up to $1.5 billion to be executed by December 31, 2028. During the year 2023, the total number of share repurchases were 1,026,300 common shares for $336.2 million, at an average price of $327.55 per share, including excise tax accrued. The 2023 shares repurchased included 328,225 common shares for $120.7 million, at an average price of $367.66 per share, including excise tax accrued, under the 2023 $1.5 billion authorization, leaving approximately $1.4 billion remaining available, as of December 31, 2023, and included 698,075 common shares repurchased for $215.5 million, at an average price of $308.69 per share, including excise tax accrued, which completed the December 2021 $1 billion authorization. During the years 2022 and 2021, the total number of share repurchases were 3,328,795 common shares for $806.4 million, at an average price of $242.24 per share and 2,398,477 common shares for $355.0 million, at an average price of $148.00 per share, respectively. The following table provides a reconciliation of basic and diluted earnings per share computations for the years ended December 31, 2023, 2022 and 2021. Years ended December 31, (Millions of dollars except share and per share amounts) 2023 2022 2021 Earnings per common share: Net income per share - basic Net income attributable to common stockholders $ 556.8 $ 672.9 $ 396.9 Weighted average common shares outstanding (in thousands) 21,493 23,506 26,210 Earnings per common share $ 25.91 $ 28.63 $ 15.14 Years ended December 31, (Millions of dollars except share and per share amounts) 2023 2022 2021 Earnings per common share - assuming dilution: Net income per share - diluted Net income attributable to common stockholders $ 556.8 $ 672.9 $ 396.9 Weighted average common shares outstanding (in thousands) 21,493 23,506 26,210 Common equivalent shares: Share-based awards 350 444 394 Weighted average common shares outstanding - assuming dilution (in thousands) 21,843 23,950 26,604 Earnings per common share assuming dilution $ 25.49 $ 28.10 $ 14.92 We have excluded from the earnings-per-share calculation certain stock options and shares that are considered to be anti-dilutive under the treasury stock method and are reported in the table below. Years ended December 31, Potentially dilutive shares excluded from the calculation as their inclusion would be anti-dilutive 2023 2022 2021 Stock options 34,133 — 80,500 Restricted share units 44 — 1,562 Total anti-dilutive shares 34,177 — 82,062

Other Financial Information

Other Financial Information	12 Months Ended
Other Financial Information	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Other Financial Information	Other Financial Information CASH FLOW DISCLOSURES — Cash income taxes paid (received), net of refunds, were $128.0 million, $199.7 million and $120.4 million for the three years ended December 31, 2023, 2022 and 2021, respectively. Interest paid, net of amounts capitalized, was $92.3 million, $81.6 million and $70.8 million for the years ended December 31, 2023, 2022 and 2021, respectively. CHANGES IN WORKING CAPITAL - Years ended December 31, (Millions of dollars) 2023 2022 2021 Accounts receivable $ (56.3) $ (84.7) $ (18.9) Inventories (22.1) (26.9) 11.1 Prepaid expenses and other current assets 25.2 (23.7) (3.6) Accounts payable and accrued liabilities (12.0) 180.1 102.9 Income taxes payable 23.1 — (8.7) Net decrease (increase) in noncash operating $ (42.1) $ 44.8 $ 82.8

Assets and Liabilities Measure

Assets and Liabilities Measure at Fair Value	12 Months Ended
Assets and Liabilities Measure at Fair Value	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Assets and Liabilities Measure at Fair Value	Assets and Liabilities Measured at Fair Value The Company carries certain assets and liabilities at fair value in its Consolidated Balance Sheets. The fair value hierarchy is based on the quality of inputs used to measure fair value, with Level 1 being the highest quality and Level 3 being the lowest quality. 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. Level 3 inputs are unobservable inputs which reflect assumptions about pricing by market participants. The Company's available-for-sale marketable securities consist of high quality, investment grade securities from diverse issuers. We value these securities at the closing price in the principal active markets as of the last business day of the reporting period. The fair values of the Company's marketable securities by asset class are described in Note 5 "Marketable Securities" in these consolidated financial statements for the period ended December 31, 2023. We value the deferred compensation plan assets, which consist of money market and mutual funds, based on quoted prices in active markets at the measurement date. For additional information on deferred compensation plans see also Note 13 "Employee and Retirement Benefit Plans" in these consolidated financial statements for the period ended December 31, 2023. At the balance sheet date, the fair value of commodity derivatives contracts was determined using NYMEX quoted values and the value of the Interest rate swap derivative was derived by using level 3 inputs. The carrying value of the Company’s Cash and cash equivalents, Accounts receivable-trade, Trade accounts payable, and accrued liabilities approximates fair value. See also Note 14 "Financial Instruments and Risk Management" in these consolidated financial statements for the period ended December 31, 2023, for more information. Financial assets and liabilities measured at fair value on a recurring basis The following table presents the Company's financial assets and liabilities measured at fair value on a recurring basis, as of December 31, 2023 and 2022: December 31, 2023 (Millions of dollars) Level 1 Level 2 Level 3 Fair Value Financial assets Marketable securities, current U.S. Government bonds $ — $ 3.0 $ — $ 3.0 U.S. Corporate bonds — 4.1 — 4.1 Prepaid expenses and other current assets Fuel derivative — — 0.6 0.6 Marketable securities, non-current U.S. Corporate bonds — 2.9 — 2.9 Non U.S. Government bonds — 1.5 — 1.5 Other assets Deferred compensation plan assets 12.5 — — 12.5 Financial liabilities Deferred credits and other liabilities Deferred compensation plan liabilities (20.2) — — (20.2) $ (7.7) $ 11.5 $ 0.6 $ 4.4 December 31, 2022 (Millions of dollars) Level 1 Level 2 Level 3 Fair Value Financial assets Marketable securities, current: U.S. Government bonds $ — $ 8.8 $ — $ 8.8 U.S. Corporate bonds — 6.1 — 6.1 Non U.S. Government bonds — 3.0 — 3.0 December 31, 2022 (Millions of dollars) Level 1 Level 2 Level 3 Fair Value Accounts receivable - trade: Interest rate swap derivative — — 1.3 1.3 Marketable securities, non-current U.S. Corporate bonds — 4.4 — 4.4 Other assets Deferred compensation plan assets 9.5 — — 9.5 Financial liabilities Deferred credits and other liabilities Deferred compensation plan liabilities (14.7) — — (14.7) $ (5.2) $ 22.3 $ 1.3 $ 18.4 Fair value of financial instruments not recognized at fair value The fair value of a financial instrument is the amount at which the instrument could be exchanged in a current transaction between willing parties. The table below excludes Cash and cash equivalents, Accounts receivable-trade, and Trade accounts payable and accrued liabilities, all of which had fair values approximating carrying amounts. The fair value of Current and Long-term debt was estimated based on rates offered to the Company at that time for debt of the same maturities. The Company has off-balance sheet exposures relating to certain financial guarantees and letters of credit. The fair value of these, which represents fees associated with obtaining the instruments, was nominal. The following table presents the carrying amounts and estimated fair values of financial instruments held by the Company at December 31, 2023 and 2022. December 31, 2023 December 31, 2022 Carrying Level 2 Carrying Level 2 (Millions of dollars) Amount Fair Value Amount Fair Value Financial liabilities Current and long-term debt, excluding finance leases $ (1,673.0) $ (1,662.9) $ (1,673.3) $ (1,643.0)

Commitments

Commitments	12 Months Ended
Commitments	Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments	Commitments The Company leases land, gasoline stores, and other facilities under operating leases. During the next five years, expected future rental payments under all operating leases are approximately $53.1 million in 2024, $52.4 million in 2025, $51.7 million in 2026, $50.9 million in 2027, and $50.4 million in 2028. Rental expense for noncancellable operating leases, including contingent payments when applicable, was $60.7 million in 2023, $57.6 million in 2022 and $48.7 million in 2021. Commitments for capital expenditures were approximately $301.9 million at December 31, 2023, including $265.0 million approved for potential construction of future stores (including land) at year-end, along with $16.7 million for improvements of existing stores, to be financed with our operating cash flow and/or incurrence of indebtedness.

Contingencies

Contingencies	12 Months Ended
Contingencies	Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Contingencies The Company’s operations and earnings have been and may be affected by various forms of governmental action. Examples of such governmental action include, but are by no means limited to: tax increases and retroactive tax claims; import and export controls; price controls; allocation of supplies of crude oil and petroleum products and other goods; laws and regulations intended for the promotion of safety and the protection and/or remediation of the environment; governmental support for other forms of energy; and laws and regulations affecting the Company’s relationships with employees, suppliers, customers, stockholders and others. Because governmental actions are often motivated by political considerations, may be taken without full consideration of their consequences, and may be taken in response to actions of other governments, it is not practical to attempt to predict the likelihood of such actions, the form the actions may take or the effect such actions may have on the Company. ENVIRONMENTAL MATTERS AND LEGAL MATTERS — Murphy USA is subject to numerous federal, state and local laws, regulations and permit requirements dealing with the environment. Violation of such environmental laws, regulations and permits can result in the imposition of significant civil and criminal penalties, injunctions, and other sanctions. A discharge of hazardous substances into the environment could, to the extent such event is not adequately insured, subject the Company to substantial expense, including the cost to comply with applicable laws and regulations, claims by neighboring landowners, governmental authorities and other third parties for any personal injury, property damage and other losses that might result. The Company currently owns or leases, and has in the past owned or leased, properties at which hazardous substances have been or are being handled. In connection with these activities, hazardous substances may have been disposed of or released on or under the properties owned or leased by the Company or on or under other locations where they have been taken for disposal. In addition, many of these properties have been operated by third parties whose management of hazardous substances was not under the Company’s control. Under existing laws, the Company could be required to remediate contaminated property (including contaminated groundwater) or to perform remedial actions to prevent future contamination. Certain of these contaminated properties are in various stages of negotiation, investigation, and/or cleanup, and the Company is investigating the extent of any related liability and the availability of applicable defenses. With the sale of the U.S. refineries in 2011, Murphy Oil retained certain liabilities related to environmental matters. Murphy Oil also obtained insurance covering certain levels of environmental exposures. With respect to the previously owned refinery properties, Murphy Oil retained those liabilities in the Separation and Distribution agreement that was entered into related to the separation on August 30, 2013. With respect to any remaining potential liabilities, based on information currently available to the Company, the Company believes costs related to these properties will not have a material adverse effect on Murphy USA’s net income, financial position or liquidity in a future period. While it is possible that certain environmental expenditures could be recovered by the Company from other sources, primarily environmental funds maintained by certain states, no assurance can be given that future recoveries from these other sources will occur. As such, the Company has not recorded a benefit for likely recoveries at December 31, 2023, however certain jurisdictions provide reimbursement for these expenses which have been considered in recording the net exposure. The U.S. EPA currently considers the Company a PRP at one Superfund site. As to the site, the potential total cost to all parties to perform necessary remedial work at this site may be substantial. However, based on current negotiations and available information, the Company believes that it is a de minimis party as to ultimate responsibility at the Superfund site. Accordingly, the Company has not recorded a liability for remedial costs at the Superfund site at December 31, 2023. The Company could be required to bear a pro rata share of costs attributable to nonparticipating PRPs or could be assigned additional responsibility for remediation at this site or other Superfund sites. Based on information currently available to the Company, the Company believes that its share of the ultimate costs to clean-up this site will be immaterial and will not have a material adverse effect on its net income, financial position or liquidity in a future period. Based on information currently available to the Company, the amount of future remediation costs to be incurred to address known contamination sites is not expected to have a material adverse effect on the Company’s future net income, cash flows or liquidity. However, there is the possibility that additional environmental expenditures could be required to address contamination, including as a result of discovering additional contamination or the imposition of new or revised requirements applicable to known contamination, and such additional expenditures could be material. Murphy USA is engaged in a number of other legal proceedings, all of which the Company considers routine and incidental to its business. Currently, the City of Charleston, South Carolina and the state of Delaware have filed lawsuits against energy companies, including the Company. These lawsuits allege damages as a result of climate change and the plaintiffs are seeking unspecified damages and abatement under various tort theories. At this early stage, the ultimate outcome of these matters remains uncertain, and neither the likelihood of an unfavorable outcome nor the ultimate liability, if any, can be determined. Based on information currently available to the Company, the ultimate resolution of those other legal matters is not expected to have a material adverse effect on the Company’s net income, financial condition, or liquidity in a future period. INSURANCE — The Company maintains insurance coverage at levels that are customary and consistent with industry standards for companies of similar size. Murphy USA maintains statutory workers compensation insurance with a deductible of $1.0 million per occurrence, general liability insurance with a deductible of $3.0 million per occurrence, and auto liability insurance with a deductible of $0.3 million per occurrence. As of December 31, 2023, there were a number of outstanding claims that are of a routine nature. The estimated incurred but unpaid liabilities relating to these claims are included in Trade account payables and accrued liabilities on the Consolidated Balance Sheets. While the ultimate outcome of these claims cannot presently be determined, management believes that the accrued liability of $47.3 million will be sufficient to cover the related liability and that the ultimate disposition of these claims will have no material effect on the Company’s financial position and results of operations. The Company has obtained insurance coverage as appropriate for the business in which it is engaged, but may incur losses that are not covered by insurance or reserves, in whole or in part, and such losses could adversely affect our results of operations and financial position. TAX MATTERS — Murphy USA is subject to extensive tax liabilities imposed by multiple jurisdictions, including income taxes, indirect taxes (excise/duty, sales/use and gross receipts taxes), payroll taxes, franchise taxes, withholding taxes and ad valorem taxes. New tax laws and regulations and changes in existing tax laws and regulations are continuously being enacted or proposed that could result in increased expenditures for tax liabilities in the future. Many of these liabilities are subject to periodic audits by the respective taxing authority. Subsequent changes to our tax liabilities because of these audits may subject us to interest and penalties. OTHER MATTERS — In the normal course of its business, the Company is required under certain contracts with various governmental authorities and others to provide financial guarantees or letters of credit that may be drawn upon if the Company fails to perform under those contracts. At December 31, 2023, the Company had contingent liabilities of $10.2 million on outstanding letters of credit. The Company has not accrued a liability in its balance sheet related to these financial guarantees and letters of credit because it is believed that the likelihood of having these drawn is remote.

Leases

Leases	12 Months Ended
Leases	Dec. 31, 2023
Leases [Abstract]
Leases	Leases The Company determines if an arrangement is a lease or contains a lease at inception. Operating lease right-of-use assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. 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. The Company's leases have remaining lease terms of approximately 1 year to 38 years, which may include the option to extend the lease when it is reasonably certain the Company will exercise the option. Most leases include one or more options to renew, with renewal terms that can extend the lease term from 5 to 20 years or more. The exercise of lease renewal options is at the Company's sole discretion. Due to the uncertainties of future markets, economic factors, technology changes, demographic shifts and behavior, environmental regulatory requirements and other information that impacts decisions as to store location, management has determined that it was not reasonably certain to exercise contract options and they are not included in the lease term. Additionally, short-term leases and leases with variable lease costs are immaterial. The Company reviews all options to extend, terminate, or otherwise modify its lease agreements to determine if changes are required to the right of use assets and liabilities. As the implicit interest rate is not readily determinable in most of the Company's lease agreements, the Company uses its estimated secured incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. Lessor — We have various arrangements for certain spaces for food service and vending equipment under which we are the lessor. These leases meet the criteria for operating lease classification. Lease income associated with these leases is immaterial. We also have certain areas where we sublease building and land space to others. This lease income is immaterial. Lessee — We lease land for 445 stores, one terminal, and various equipment. Our lease agreements do not contain any material residual value guarantees and approximately 102 sites leased from Walmart contain restrictive covenants, though the restrictions are deemed to have an immaterial impact. Leases are reflected in the following balance sheet accounts: (Millions of dollars) Classification December 31, December 31, Assets Operating (Right-of-use) Operating lease right of use assets, net $ 452.1 $ 449.6 Finance Property, plant, and equipment, at cost, less accumulated depreciation of $42.6 in 2023 and $30.5 in 2022 113.8 124.6 Total leased assets $ 565.9 $ 574.2 Liabilities Current Operating Trade accounts payable and accrued liabilities $ 22.1 $ 20.5 Finance Current maturities of long-term debt 11.0 11.0 Noncurrent Operating Non-current operating lease liabilities 450.3 444.2 Finance Long-term debt, including capitalized lease obligations 115.7 122.6 Total lease liabilities $ 599.1 $ 598.3 Lease Cost: Year Ended December 31, (Millions of dollars) Classification 2023 2022 2021 Operating lease cost Store and other operating expenses $ 55.1 $ 52.2 $ 43.1 Finance lease cost Amortization of leased Depreciation & amortization expense 15.0 15.9 14.8 Interest on lease liabilities Interest expense 8.9 9.1 8.2 Net lease costs $ 79.0 $ 77.2 $ 66.1 Cash Flow Information: Year Ended December 31, (Millions of dollars) 2023 2022 2021 Cash paid for amounts included in the measurement of liabilities Operating cash flows required by operating leases $ 50.6 $ 45.6 $ 38.8 Operating cash flows required by finance leases $ 8.9 $ 9.1 $ 8.2 Financing cash flows required by finance leases $ 11.4 $ 11.2 $ 9.8 Maturity of Lease Liabilities: (Millions of dollars) Operating leases Finance leases 2024 $ 53.1 $ 19.1 2025 52.4 18.0 2026 51.7 16.8 2027 50.9 16.0 2028 50.4 15.5 After 2028 535.8 106.9 Total lease payments 794.3 192.3 less: interest 321.9 65.6 Present value of lease liabilities $ 472.4 $ 126.7 Lease Term and Discount Rate: Year Ended December 31, 2023 Weighted average remaining lease term In Years Finance leases 12.2 Operating leases 15.1 Weighted average discount rate Finance leases 6.8 % Operating leases 6.6 %
Leases	Leases The Company determines if an arrangement is a lease or contains a lease at inception. Operating lease right-of-use assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. 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. The Company's leases have remaining lease terms of approximately 1 year to 38 years, which may include the option to extend the lease when it is reasonably certain the Company will exercise the option. Most leases include one or more options to renew, with renewal terms that can extend the lease term from 5 to 20 years or more. The exercise of lease renewal options is at the Company's sole discretion. Due to the uncertainties of future markets, economic factors, technology changes, demographic shifts and behavior, environmental regulatory requirements and other information that impacts decisions as to store location, management has determined that it was not reasonably certain to exercise contract options and they are not included in the lease term. Additionally, short-term leases and leases with variable lease costs are immaterial. The Company reviews all options to extend, terminate, or otherwise modify its lease agreements to determine if changes are required to the right of use assets and liabilities. As the implicit interest rate is not readily determinable in most of the Company's lease agreements, the Company uses its estimated secured incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. Lessor — We have various arrangements for certain spaces for food service and vending equipment under which we are the lessor. These leases meet the criteria for operating lease classification. Lease income associated with these leases is immaterial. We also have certain areas where we sublease building and land space to others. This lease income is immaterial. Lessee — We lease land for 445 stores, one terminal, and various equipment. Our lease agreements do not contain any material residual value guarantees and approximately 102 sites leased from Walmart contain restrictive covenants, though the restrictions are deemed to have an immaterial impact. Leases are reflected in the following balance sheet accounts: (Millions of dollars) Classification December 31, December 31, Assets Operating (Right-of-use) Operating lease right of use assets, net $ 452.1 $ 449.6 Finance Property, plant, and equipment, at cost, less accumulated depreciation of $42.6 in 2023 and $30.5 in 2022 113.8 124.6 Total leased assets $ 565.9 $ 574.2 Liabilities Current Operating Trade accounts payable and accrued liabilities $ 22.1 $ 20.5 Finance Current maturities of long-term debt 11.0 11.0 Noncurrent Operating Non-current operating lease liabilities 450.3 444.2 Finance Long-term debt, including capitalized lease obligations 115.7 122.6 Total lease liabilities $ 599.1 $ 598.3 Lease Cost: Year Ended December 31, (Millions of dollars) Classification 2023 2022 2021 Operating lease cost Store and other operating expenses $ 55.1 $ 52.2 $ 43.1 Finance lease cost Amortization of leased Depreciation & amortization expense 15.0 15.9 14.8 Interest on lease liabilities Interest expense 8.9 9.1 8.2 Net lease costs $ 79.0 $ 77.2 $ 66.1 Cash Flow Information: Year Ended December 31, (Millions of dollars) 2023 2022 2021 Cash paid for amounts included in the measurement of liabilities Operating cash flows required by operating leases $ 50.6 $ 45.6 $ 38.8 Operating cash flows required by finance leases $ 8.9 $ 9.1 $ 8.2 Financing cash flows required by finance leases $ 11.4 $ 11.2 $ 9.8 Maturity of Lease Liabilities: (Millions of dollars) Operating leases Finance leases 2024 $ 53.1 $ 19.1 2025 52.4 18.0 2026 51.7 16.8 2027 50.9 16.0 2028 50.4 15.5 After 2028 535.8 106.9 Total lease payments 794.3 192.3 less: interest 321.9 65.6 Present value of lease liabilities $ 472.4 $ 126.7 Lease Term and Discount Rate: Year Ended December 31, 2023 Weighted average remaining lease term In Years Finance leases 12.2 Operating leases 15.1 Weighted average discount rate Finance leases 6.8 % Operating leases 6.6 %

Recent Accounting and Reporting

Recent Accounting and Reporting Rules	12 Months Ended
Recent Accounting and Reporting Rules	Dec. 31, 2023
Accounting Standards Update and Change in Accounting Principle [Abstract]
Recent Accounting and Reporting Rules	Recent Accounting and Reporting Rules In December 2023, the FASB issued ASU 2023-06, "Codification Amendments in Response to the SEC's Disclosure Update and Simplification Initiative," which incorporates into the FASB Codification several disclosure and presentation requirements in SEC Regulations S-X and S-K that overlap with US GAAP. While the ASU is not expected to significantly affect entities currently subject to the corresponding SEC requirements, certain disclosures currently presented outside the financial statements under Regulation S-K may need to be relocated into the financial statements. If the SEC does not remove the existing disclosure requirements from Regulations S-X or S-K by June 30, 2027, the corresponding pending content will be removed from the Codification and will not become effective for any entities. The Company has determined this will not have a material impact on the Company's consolidated financial statements. In December 2023, the FASB issued ASU 2023-07, "Segment Reporting: Improvements to Reportable Segment Disclosures." The amendments in this Update improve financial reporting by requiring disclosure of incremental segment information on an annual and interim basis for all public entities and clarifies that single reportable segment entities must apply Topic 280 in its entirety. The amendments in this Update are effective for the Company for the year beginning January 1, 2024, with early adoption permitted. The amendments should be applied retrospectively to all prior periods presented in the financial statement. The Company has determined this will not have a material impact on the Company's consolidated financial statements.

Business Segments

Business Segments	12 Months Ended
Business Segments	Dec. 31, 2023
Segment Reporting [Abstract]
Business Segments	Business Segments Our operations include the sale of retail motor fuel products and convenience merchandise along with the wholesale and bulk sale capabilities of our product supply and wholesale group. As the primary purpose of the product supply and wholesale group is to support our retail operations and provide fuel for their daily operation, the bulk and wholesale fuel sales are secondary to the support functions played by these groups. As such, they are all treated as one segment for reporting purposes as they sell the same products and have similar economic characteristics. This Marketing segment contains essentially all of the revenue generating activities of the Company. Results not included in the reportable segment include Corporate and Other Assets. The reportable segment was determined based on information reviewed by the Chief Operating Decision Maker. Segment Information Corporate and Other Assets (Millions of dollars) Marketing Consolidated Year ended December 31, 2023 Segment income (loss) $ 630.9 $ (74.1) $ 556.8 Revenues from external customers $ 21,528.9 $ 0.5 $ 21,529.4 Investment income $ — $ 6.9 $ 6.9 Interest expense $ (8.9) $ (89.6) $ (98.5) Income tax expense (benefit) $ 203.0 $ (25.4) $ 177.6 Segment Information Corporate and Other Assets (Millions of dollars) Marketing Consolidated Significant noncash charges (credits) Depreciation and amortization $ 211.9 $ 16.8 $ 228.7 Accretion of asset retirement obligations $ 3.0 $ — $ 3.0 Deferred and noncurrent income taxes (benefits) $ (4.5) $ 6.5 $ 2.0 Additions to property, plant and equipment $ 289.5 $ 54.6 $ 344.1 Total assets at year-end $ 4,061.7 $ 278.4 $ 4,340.1 Segment Information Corporate and Other Assets (Millions of dollars) Marketing Consolidated Year ended December 31, 2022 Segment income (loss) $ 740.9 $ (68.0) $ 672.9 Revenues from external customers $ 23,445.4 $ 0.7 $ 23,446.1 Investment income $ — $ 3.0 $ 3.0 Interest expense $ (9.0) $ (76.3) $ (85.3) Income tax expense (benefit) $ 232.1 $ (21.2) $ 210.9 Significant noncash charges (credits) Depreciation and amortization $ 204.8 $ 15.6 $ 220.4 Accretion of asset retirement obligations $ 2.7 $ — $ 2.7 Deferred and noncurrent income taxes (benefits) $ 35.0 $ (3.5) $ 31.5 Additions to property, plant and equipment $ 279.1 $ 26.7 $ 305.8 Total assets at year-end $ 3,794.0 $ 329.2 $ 4,123.2 Segment Information Corporate and Other Assets (Millions of dollars) Marketing Consolidated Year ended December 31, 2021 Segment income (loss) $ 472.8 $ (75.9) $ 396.9 Revenues from external customers $ 17,359.9 $ 0.6 $ 17,360.5 Investment income $ — $ 0.1 $ 0.1 Interest expense $ (8.1) $ (74.3) $ (82.4) Income tax expense (benefit) $ 148.5 $ (23.5) $ 125.0 Significant noncash charges (credits) Depreciation and amortization $ 197.3 $ 15.3 $ 212.6 Accretion of asset retirement obligations $ 2.5 $ — $ 2.5 Deferred and noncurrent income taxes (benefits) $ 22.6 $ (3.6) $ 19.0 Additions to property, plant and equipment $ 245.5 $ 32.0 $ 277.5 Total assets at year-end $ 3,569.4 $ 478.8 $ 4,048.2

Schedule II - Valuation And Qua

Schedule II - Valuation And Qualifying Accounts	12 Months Ended
Schedule II - Valuation And Qualifying Accounts	Dec. 31, 2023
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Schedule II - Valuation And Qualifying Accounts	SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS Murphy USA Inc. Valuation Accounts and Reserves (Millions of dollars) Balance at January 1, Charged (Credited) to Expense Deductions Balance at December 31, 2023 Deducted from assets accounts Allowance for doubtful accounts $ 0.3 1.0 — $ 1.3 2022 Deducted from assets accounts Allowance for doubtful accounts $ 0.1 0.2 — $ 0.3 2021 Deducted from assets accounts Allowance for doubtful accounts $ 0.1 — — $ 0.1

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	12 Months Ended
Significant Accounting Policies (Policies)	Dec. 31, 2023
Accounting Policies [Abstract]
Principles of Consolidation	PRINCIPLES OF CONSOLIDATION – These consolidated financial statements were prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) and include the accounts of Murphy USA Inc. and its subsidiaries for all periods presented. All significant intercompany accounts and transactions within the consolidated financial statements have been eliminated.
Revenue Recognition, Shipping and Handling Costs and Vendor Allowances and Rebates	REVENUE RECOGNITION – Revenue is recognized when obligations under the terms of a contract with our customers are satisfied; generally, this occurs with the transfer of control of our petroleum products, convenience merchandise, Renewable Identification Numbers ("RINs") and other assets to our third-party customers. Revenue is measured as the amounts of consideration we expect to receive in exchange for transferring goods or providing services. Excise and sales tax that we collect where we have determined we are the principal in the transaction have been recorded as revenue on a jurisdiction-by-jurisdiction basis. The Company enters into buy/sell and similar arrangements when petroleum products are held at one location but are needed at a different location. The Company often pays or receives funds related to the buy/sell arrangement based on location or quality differences. The Company accounts for such transactions as non-monetary exchanges under existing accounting guidance and typically reports these on a net basis in its Consolidated Income Statements. See Note 3 "Revenues" for additional information. SHIPPING AND HANDLING COSTS – Costs incurred for the shipping and handling of motor fuel are included in Petroleum product cost of goods sold in the Consolidated Income Statements. Costs incurred for the shipping and handling of convenience store merchandise are included in Merchandise cost of goods sold in the Consolidated Income Statements. VENDOR ALLOWANCES AND REBATES – Murphy USA receives payments for vendor allowances, volume rebates and other related payments from various suppliers of its convenience store merchandise. Vendor allowances for price markdowns are credited to merchandise cost of goods sold during the period the related markdown is recognized. Volume rebates of merchandise are recorded as reductions to merchandise cost of goods sold when the merchandise qualifying for the rebate is sold. Slotting and stocking allowances received from a vendor are recorded as a reduction to cost of sales over the period covered by the agreement. Petroleum product sales (at retail). For our retail store locations, the revenue related to petroleum product sales is recognized as the fuel is pumped to our customers. The transaction price at the pump typically includes some portion of sales or excise taxes as levied in the respective jurisdictions. Those taxes that are collected for remittance to governmental entities on a pass through basis are not recognized as revenue and they are recorded to a liability account until they are paid. Our customers typically use a mixture of cash, checks, credit cards and debit cards to pay for our products as they are received. We have accounts receivable from the various credit/debit card providers at any point in time related to product sales made on credit cards and debit cards. These receivables are typically collected in two Petroleum product sales (at wholesale). Our sales of petroleum products at wholesale are generally recorded as revenue when the deliveries have occurred and legal ownership of the product has transferred to the customer. Title transfer for bulk refined product sales typically occurs at pipeline custody points and upon trucks loading at product terminals. For bulk pipeline sales, we record receivables from customers that are generally collected within a week from custody transfer date. For our rack product sales, the majority of our customers' accounts are drafted by us within 10 days from product transfer. Merchandise sales. For our retail store locations, the revenue related to merchandise sales is recognized as the customer completes their purchase at our locations. The transaction price typically includes some portion of sales tax as levied in the respective jurisdictions. Those taxes that are collected for remittance to governmental entities on a pass through basis are not recognized as revenue and they are recorded to a liability account until they are paid. As noted above, a mixture of payment types are used for these revenues and the same terms for credit/debit card receivables are realized. With respect to merchandise sales revenue we must determine whether we are the principal or agent for some categories of merchandise such as scratch-off lottery tickets, lotto tickets, newspapers and other small categories of merchandise. For scratch-off lottery tickets, we have determined we are the principal in the majority of the jurisdictions and therefore we record those sales on a gross basis. We have some categories of merchandise (such as lotto tickets) where we are the agent and the revenues recorded for those transactions are our net commission only. The Company offers loyalty programs through each of its branded retail locations. The customers earn rewards based on their spending or other promotional activities. These programs create a performance obligation which requires us to defer a portion of sales revenue to the loyalty program participants until they redeem their rewards. The rewards may be redeemed for free or discounted merchandise or cash discounts at all stores and on fuel purchases at Murphy branded stores. Earned rewards expire after an account is inactive for a period of 90 days at Murphy branded stores, while certain QuickChek rewards require use within the month. We recognize loyalty revenue when a customer redeems an earned reward. Deferred revenue associated with both rewards programs are included in Trade accounts payable and accrued liabilities in our Consolidated Balance Sheet. The deferred revenue balances at December 31, 2023 and 2022 were immaterial. RINs sales. For the sale of RINs, we recognize revenue when the RIN is transferred to the counter-party and the sale is completed. Receivables from our counter-parties related to the RIN sales are typically collected within five days of the sale. Other revenues. Items reported as other operating revenues include collection allowances for excise and sales tax and other miscellaneous items and are recognized as revenue when the transaction is completed.
Taxes Collected from Customers and Remitted to Government Authorities	TAXES COLLECTED FROM CUSTOMERS AND REMITTED TO GOVERNMENT AUTHORITIES – Excise and other taxes collected on sales of refined products and remitted to governmental agencies are included in operating revenues and operating expenses in the Consolidated Income Statements.
Cash Equivalents	CASH EQUIVALENTS – Short-term investments, which include government securities, money market funds and other instruments with government securities as collateral, that have a maturity of three months or less from the date of purchase are classified as cash equivalents.
Marketable Securities	MARKETABLE SECURITIES – The Company considers highly liquid treasury notes, corporate debt securities, and other funds with original maturities of more than three months to be marketable securities. Securities with less than one year to maturity are included in short-term marketable securities, and all other securities are classified as long-term marketable securities. Marketable securities are classified as held-to-maturity when the Company has both the positive intent and ability to hold the securities to maturity and are carried at amortized cost. Marketable securities are classified as available-for-sale when the Company does not have the intent to hold securities to maturity to allow flexibility in response to liquidity needs and are carried at fair value. The Company records securities at fair value on its consolidated balance sheets, with unrealized gains and losses reported as a component of accumulated other comprehensive income (loss). See Note 5 "Marketable Securities" and Note 17 "Assets and Liabilities Measured at Fair Value" for additional information on our policy and the fair value measurement of the Company's marketable securities.
Accounts Receivable	ACCOUNTS RECEIVABLE – The Company’s accounts receivable are recorded at the invoiced amount and do not bear interest. The accounts receivable primarily consists of amounts owed to the Company from credit card companies and by customers for wholesale sales of refined petroleum products. The allowance for doubtful accounts is the Company’s best estimate of the amount of probable credit losses on these receivables. The Company reviews this allowance for adequacy at least quarterly and bases its assessment on a combination of current information about its customers and historical write-off experience. Any trade accounts receivable balances written off are charged against the allowance for doubtful accounts. The Company has not experienced any significant credit-related losses in the past three years.
Inventories	INVENTORIES – Inventories of petroleum products are valued at the lower of cost, generally applied on a last-in, first-out (“LIFO”) basis, or market. Any increments to LIFO inventory volumes are valued based on the first purchase price for these volumes during the year. Merchandise inventories held for resale are generally valued at average cost. Materials and supplies are valued at the lower of average cost or net realizable value.
Business Combinations	BUSINESS COMBINATIONS –
Property, Plant and Equipment	PROPERTY, PLANT AND EQUIPMENT – Additions to property, plant and equipment, including renewals and betterments, are capitalized and recorded at cost. Certain marketing facilities are primarily depreciated using the composite straight-line method with depreciable lives ranging from 16 to 25 years. Gasoline stores, improvements to gasoline stores and other assets are depreciated over 3 to 50 years by individual unit on the straight-line method. The Company capitalizes interest costs as a component of construction in progress on individually significant projects based on the weighted average interest rates incurred on its long-term borrowings. Total interest cost capitalized was $2.4 million in 2023, $1.1 million in 2022 and $2.1 million in 2021.
Goodwill and Intangible Assets	GOODWILL AND INTANGIBLE ASSETS –
Impairment of Assets	IMPAIRMENT OF ASSETS – Long-lived assets, which include property and equipment and finite-lived assets, are tested for recoverability whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable. Indefinite-lived intangible assets are tested annually. A long-lived asset is not recoverable if its carrying amount exceeds the sum of the undiscounted cash flows expected to result from its use and eventual disposition. If a long-lived asset is not recoverable, an impairment loss is recognized for the amount by which the carrying amount of the long-lived asset exceeds its fair value, with fair value determined based on discounted estimated net cash flows or other appropriate methods.
Asset Retirement Obligations	ASSET RETIREMENT OBLIGATIONS – The Company records a liability for asset retirement obligations (“ARO”) equal to the fair value of the estimated cost to retire an asset. The ARO liability is initially recorded in the period in which the obligation meets the definition of a liability, which is generally when the asset is placed in service. The ARO liability is estimated using existing regulatory requirements and anticipated future inflation rates. When the liability is initially recorded, the Company increases the carrying amount of the related long-lived asset by an amount equal to the original liability. The liability is increased over time to reflect the change in its present value, and the capitalized cost is depreciated over the useful life of the related long-lived asset. The Company reevaluates the adequacy of its recorded ARO liability at least annually. Actual costs of asset retirements such as dismantling service stores and site restoration are charged against the related liability. Any difference between costs incurred upon settlement of an asset retirement obligation and the recorded liability is recognized as a gain or loss in the Company’s Consolidated Income Statements.
Environmental Liabilities	ENVIRONMENTAL LIABILITIES – A liability for environmental matters is established when it is probable that an environmental obligation exists and the cost can be reasonably estimated. If there is a range of reasonably estimated costs, the most likely amount will be recorded, or if no amount is most likely, the minimum of the range is used. Related expenditures are charged against the liability. Environmental remediation liabilities have not been discounted for the time value of future expected payments. Environmental expenditures that have future economic benefit are capitalized.
Income Taxes	INCOME TAXES – The Company accounts for income taxes using the asset and liability method. Under this method, income taxes are provided for amounts currently payable and for amounts deferred as tax assets and liabilities based on differences between the financial statement carrying amounts and the tax bases of existing assets and liabilities. Deferred income taxes are measured using the enacted tax rates that are assumed will be in effect when the differences reverse. The Company routinely assesses the realizability of deferred tax assets based on available positive and negative evidence including assumptions of future taxable income, tax planning strategies and other pertinent factors. A deferred tax asset valuation allowance is recorded when evidence indicates that it is more likely than not that all or a portion of these deferred tax assets will not be realized in a future period. The accounting principles for income tax uncertainties permit recognition of income tax benefits only when they are more likely than not to be realized. The Company has elected to classify any interest expense and penalties related to the underpayment of income taxes in Income tax expense in the Consolidated Income Statements.
Derivative Instruments and Hedging Activities	DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES – The fair value of a derivative instrument is recognized as an asset or liability in the Company’s Consolidated Balance Sheets. Upon entering into a derivative contract, the Company may designate the derivative as either a fair value hedge or a cash flow hedge, or decide that the contract is not a hedge, and therefore, recognize changes in the fair value of the contract in earnings. The Company documents the relationship between the derivative instrument designated as a hedge and the hedged items as well as its objective for risk management and strategy for use of the hedging instrument to manage the risk. Derivative instruments designated as fair value or cash flow hedges are linked to specific assets and liabilities or to specific firm commitments or forecasted transactions. The Company assesses at inception and on an ongoing basis whether a derivative instrument accounted for as a hedge is highly effective in offsetting changes in the fair value or cash flows of the hedged item. A derivative that is not a highly effective hedge does not qualify for hedge accounting. The change in the fair value of a qualifying fair value hedge is recorded in earnings along with the gain or loss on the hedged item. The effective portion of the change in the fair value of a qualifying cash flow hedge is recorded in Accumulated other comprehensive income (AOCI) in the consolidated Balance Sheets until the hedged item is recognized currently in earnings. If a derivative instrument no longer qualifies as a cash flow hedge and the underlying forecasted transaction is no longer probable of occurring, hedge accounting is discontinued and the gain or loss recorded in Accumulated other comprehensive income is recognized immediately in earnings. If a hedge is de-designated, hedge accounting will no longer apply and from that time the gain and losses will be recognized in earnings and any accumulated amounts in other comprehensive income will be amortized to earnings over the remaining life of the underlying instrument. See Note 14 "Financial Instruments and Risk Management" and Note 17 "Assets and Liabilities Measured at Fair Value" for further information about the Company’s derivatives. DERIVATIVE INSTRUMENTS — The Company makes limited use of derivative instruments to manage certain risks related to commodity prices and interest rates. The use of derivative instruments for risk management is covered by operating policies and is closely monitored by the Company’s senior management. The Company does not hold any derivatives for speculative purposes, and it does not use derivatives with leveraged or complex features. Derivative instruments are traded primarily with creditworthy major financial institutions or over national exchanges such as the New York Mercantile Exchange (“NYMEX”). For accounting purposes, the Company has not designated commodity derivative contracts as hedges, and therefore, it recognizes all gains and losses on these derivative contracts in its Consolidated Statement of Income. Certain interest rate derivative contracts were accounted for as hedges and gain or loss associated with recording the fair value of these contracts was deferred in AOCI until the anticipated transactions occur.
Stock-Based Compensation	STOCK-BASED COMPENSATION – The fair value of awarded stock options, restricted stock, restricted stock units and performance stock units is determined based on a combination of management assumptions for awards issued. The Company uses the Black-Scholes option pricing model for computing the fair value of stock options. The primary assumptions made by management included the expected life of the stock option award and the expected volatility of the Company’s common stock prices. The Company uses both historical data and current information to support its assumptions. Stock option expense is recognized on a straight-line basis over the requisite service period of three years. The Company uses a Monte Carlo valuation model to determine the fair value of performance-based stock units that are based on performance compared against a peer group and the related expense is recognized over the three-year requisite service period. Management estimates the number of all awards that will not vest and adjusts its compensation expense accordingly. Differences between estimated and actual vested amounts are accounted for as an adjustment to expense when known. See Note 12 "Incentive Plans" for a discussion of the basis of allocation of such costs.
Use of Estimates	USE OF ESTIMATES – In preparing the financial statements of the Company in conformity with U.S. GAAP, management has made a number of estimates and assumptions related to the reporting of assets, liabilities, revenues, and expenses and the disclosure of contingent assets and liabilities. Actual results may differ from
Leases	The Company determines if an arrangement is a lease or contains a lease at inception. Operating lease right-of-use assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. 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. The Company's leases have remaining lease terms of approximately 1 year to 38 years, which may include the option to extend the lease when it is reasonably certain the Company will exercise the option. Most leases include one or more options to renew, with renewal terms that can extend the lease term from 5 to 20 years or more. The exercise of lease renewal options is at the Company's sole discretion. Due to the uncertainties of future markets, economic factors, technology changes, demographic shifts and behavior, environmental regulatory requirements and other information that impacts decisions as to store location, management has determined that it was not reasonably certain to exercise contract options and they are not included in the lease term. Additionally, short-term leases and leases with variable lease costs are immaterial. The Company reviews all options to extend, terminate, or otherwise modify its lease agreements to determine if changes are required to the right of use assets and liabilities.
Recent Accounting and Reporting Rules	Recent Accounting and Reporting Rules In December 2023, the FASB issued ASU 2023-06, "Codification Amendments in Response to the SEC's Disclosure Update and Simplification Initiative," which incorporates into the FASB Codification several disclosure and presentation requirements in SEC Regulations S-X and S-K that overlap with US GAAP. While the ASU is not expected to significantly affect entities currently subject to the corresponding SEC requirements, certain disclosures currently presented outside the financial statements under Regulation S-K may need to be relocated into the financial statements. If the SEC does not remove the existing disclosure requirements from Regulations S-X or S-K by June 30, 2027, the corresponding pending content will be removed from the Codification and will not become effective for any entities. The Company has determined this will not have a material impact on the Company's consolidated financial statements. In December 2023, the FASB issued ASU 2023-07, "Segment Reporting: Improvements to Reportable Segment Disclosures." The amendments in this Update improve financial reporting by requiring disclosure of incremental segment information on an annual and interim basis for all public entities and clarifies that single reportable segment entities must apply Topic 280 in its entirety. The amendments in this Update are effective for the Company for the year beginning January 1, 2024, with early adoption permitted. The amendments should be applied retrospectively to all prior periods presented in the financial statement. The Company has determined this will not have a material impact on the Company's consolidated financial statements.

Revenues (Tables)

Revenues (Tables)	12 Months Ended
Revenues (Tables)	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Schedule of Disaggregation of Revenue	The following table disaggregates our revenue by major source for the years ended December 31, 2023, 2022, and 2021. Years Ended December 31, (Millions of dollars) 2023 2022 2021 Marketing Segment Petroleum product sales (at retail) 1 $ 15,279.9 $ 17,198.9 $ 12,022.7 Petroleum product sales (at wholesale) 1 1,824.5 2,031.2 1,388.1 Total petroleum product sales 17,104.4 19,230.1 13,410.8 Merchandise sales 4,089.3 3,903.2 3,677.7 Other operating revenues: RINs 328.6 305.8 265.3 Other revenues 2 6.6 6.3 6.1 Total marketing segment revenues 21,528.9 23,445.4 17,359.9 Corporate and Other Assets 0.5 0.7 0.6 Total revenues $ 21,529.4 $ 23,446.1 $ 17,360.5 1 Includes excise and sales taxes that remain eligible for inclusion under Topic 606 2 Primarily includes collection allowance on excise and sales taxes combined with other miscellaneous items

Inventories (Tables)

Inventories (Tables)	12 Months Ended
Inventories (Tables)	Dec. 31, 2023
Inventory Disclosure [Abstract]
Schedule of Inventory	Inventories consisted of the following: December 31, (Millions of dollars) 2023 2022 Petroleum products - FIFO basis $ 331.2 $ 367.0 Store merchandise for resale - FIFO basis 209.1 192.1 Less LIFO reserve (212.1) (250.7) Total petroleum products and store merchandise inventory 328.2 308.4 Materials and supplies 13.0 10.7 Total inventories $ 341.2 $ 319.1

Marketable Securities (Tables)

Marketable Securities (Tables)	12 Months Ended
Marketable Securities (Tables)	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Schedule of Amortized Cost and Carrying Value of Marketable Securities	The amortized cost and carrying value (fair value) of marketable securities and the balance sheet location at December 31, 2023 and December 31, 2022 consist of the following: December 31, 2023 (Millions of dollars) Amortized Gross Gross Estimated Available-for-sale securities: Marketable securities current U.S. Government bonds $ 3.0 — — $ 3.0 U.S. Corporate bonds 3.9 — — 3.9 Investment income receivable 0.2 — — 0.2 7.1 — — 7.1 Marketable securities non-current U.S. Corporate bonds 2.9 — — 2.9 Non U.S. Corporate bonds 1.5 — — 1.5 4.4 — — 4.4 Total marketable securities $ 11.5 $ — $ — $ 11.5 December 31, 2022 (Millions of dollars) Amortized Gross Gross Estimated Available-for-sale securities: Marketable securities current U.S. Government bonds $ 8.8 — — $ 8.8 U.S. Corporate bonds 6.0 — — 6.0 Non U.S. Corporate bonds 3.0 — — 3.0 Investment income receivable 0.1 — — 0.1 17.9 — — 17.9 Marketable securities non-current U.S. Corporate bonds 4.4 — — 4.4 Total marketable securities $ 22.3 $ — $ — $ 22.3
Schedule of Amortized Cost Basis and Fair Value of Available-for-Sale Marketable Securities	The amortized cost basis and fair value of the Company's available-for-sale marketable securities at December 31, 2023, by contractual maturity, are as follows: (Millions of dollars) Amortized Cost Fair Value Less than 1 year $ 11.4 $ 11.4 1 to 2 years — — Total $ 11.4 $ 11.4

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
Property, Plant and Equipment (Tables)	Dec. 31, 2023
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant and Equipment	December 31, 2023 December 31, 2022 (Millions of dollars) Estimated Useful Life Cost Net Cost Net Land $ 655.7 $ 655.7 $ 645.2 $ 645.2 Real estate finance leases 1 to 40 years 149.2 110.9 147.7 122.2 Pipeline and terminal facilities 16 to 25 years 93.8 49.9 83.7 42.5 Retail gasoline stores 3 to 50 years 3,136.3 1,623.7 2,897.7 1,536.4 Buildings 20 to 45 years 74.9 46.7 71.0 47.2 Other 3 to 20 years 201.1 84.9 167.1 65.8 $ 4,311.0 $ 2,571.8 $ 4,012.4 $ 2,459.3

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	12 Months Ended
Goodwill and Intangible Assets (Tables)	Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	December 31, (Millions of dollars) 2023 2022 Goodwill $ 328.0 $ 328.0
Schedule of Intangible Assets	Intangible assets subject to amortization at December 31, 2023 and 2022 consisted of the following: Remaining Useful Life (in years) December 31, 2023 December 31, 2022 (Millions of dollars) Cost Net Cost Net Intangible assets subject to amortization: Pipeline space 31.7 $ 39.6 $ 31.7 $ 39.6 $ 32.7 Intangible lease liability 10.4 (9.1) (7.3) (9.1) (7.9) Remaining Useful Life (in years) December 31, 2023 December 31, 2022 (Millions of dollars) Cost Net Cost Net Total intangible assets subject to amortization 30.5 24.4 30.5 24.8 Intangible assets not subject to amortization, indefinite lives: Trade name 115.4 115.4 115.4 115.4 Liquor licenses — — 0.2 0.2 Total intangible assets not subject to amortization 115.4 115.4 115.6 115.6 Intangible assets, net of amortization $ 145.9 $ 139.8 $ 146.1 $ 140.4

Accounts Payable And Accrued _2

Accounts Payable And Accrued Liabilities (Tables)	12 Months Ended
Accounts Payable And Accrued Liabilities (Tables)	Dec. 31, 2023
Payables and Accruals [Abstract]
Schedule of Accounts Payable and Accrued Liabilities	Trade accounts payable and accrued liabilities consisted of the following: December 31, (Millions of dollars) 2023 2022 Trade accounts payable $ 520.3 $ 547.6 Excise taxes/withholdings payable 108.5 93.2 Accrued insurance obligations 55.9 51.8 Accrued taxes other than income 43.4 44.6 Accrued compensation and benefits 50.1 46.6 Current operating lease liabilities 22.1 20.5 Other 34.4 34.9 Accounts payable and accrued liabilities $ 834.7 $ 839.2

Long-Term Debt (Tables)

Long-Term Debt (Tables)	12 Months Ended
Long-Term Debt (Tables)	Dec. 31, 2023
Debt Disclosure [Abstract]
Schedule of Long-Term Debt	Long-term debt consisted of the following: December 31, (Millions of dollars) 2023 2022 5.625% senior notes due 2027 (net of unamortized discount of $1.3 at 2023 and $1.6 at 2022) $ 298.7 $ 298.4 4.75% senior notes due 2029 (net of unamortized discount of $3.6 at 2023 and $4.2 at 2022) 496.4 495.8 3.75% senior notes due 2031 (net of unamortized discount of $4.4 at 2023 and $5.1 at 2022) 495.6 494.9 Term loan due 2028 (effective interest rate of 7.23% at 2023 and 5.95% at 2022) net of unamortized discount of $0.6 at 2023 and $0.7 at 2022 389.4 393.3 Capitalized lease obligations, autos and equipment, due through 2027 3.1 2.3 Capitalized lease obligations, buildings, due through 2059 123.6 131.3 Unamortized debt issuance costs (7.1) (9.1) Total long-term debt 1,799.7 1,806.9 Less current maturities 15.0 15.0 Total long-term debt, net of current $ 1,784.7 $ 1,791.9

Asset Retirement Obligations _2

Asset Retirement Obligations (ARO) (Tables)	12 Months Ended
Asset Retirement Obligations (ARO) (Tables)	Dec. 31, 2023
Asset Retirement Obligation Disclosure [Abstract]
Reconciliation of Aggregate Carrying Amount of ARO	A reconciliation of the beginning and ending aggregate carrying amount of the ARO is shown in the following table: December 31, (Millions of dollars) 2023 2022 Balance at beginning of period $ 43.3 $ 39.2 Accretion expense 3.0 2.7 Settlement of liabilities (3.1) (2.3) Liabilities incurred 2.9 3.7 Balance at end of period $ 46.1 $ 43.3

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
Income Taxes (Tables)	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Schedule of Components of Income Before Income Taxes And Income Tax Expense (Benefit)	The components of income before income taxes for each of the three years ended December 31, 2023 and income tax expense (benefit) attributable thereto were as follows: Years Ended December 31, (Millions of dollars) 2023 2022 2021 Income (loss) before income taxes $ 734.4 $ 883.8 $ 521.9 Income tax expense (benefit) Federal - Current $ 141.5 $ 143.5 $ 86.2 Federal - Deferred 3.5 33.0 14.4 State - Current and deferred 32.6 34.4 24.4 Total $ 177.6 $ 210.9 $ 125.0
Schedule of Reconciliation of Income Taxes to Statutory Rate	The following table reconciles income taxes based on the U.S. statutory tax rate to the Company’s income tax expense (benefit). Years Ended December 31, (Millions of dollars) 2023 2022 2021 Income tax expense based on the U.S. statutory tax rate $ 154.2 $ 185.6 $ 109.6 State income taxes, net of federal benefit 25.0 28.0 19.2 Federal credits (2.6) (2.9) (2.2) Other, net 1.0 0.2 (1.6) Total $ 177.6 $ 210.9 $ 125.0
Schedule of Deferred Tax Assets and Deferred Tax Liabilities	An analysis of the Company’s deferred tax assets and deferred tax liabilities at December 31, 2023 and 2022 showing the tax effects of significant temporary differences is as follows: December 31, (Millions of dollars) 2023 2022 Deferred tax assets Property costs and asset retirement obligations $ 6.4 $ 5.9 Employee benefits 12.9 10.7 Operating leases liability 99.2 97.6 Other deferred tax assets 13.5 13.6 Total gross deferred tax assets 132.0 127.8 Deferred tax liabilities Accumulated depreciation and amortization (327.9) (316.0) State deferred taxes (29.4) (30.5) Operating leases right of use assets (94.9) (94.4) Other deferred tax liabilities (9.3) (14.3) Total gross deferred tax liabilities (461.5) (455.2) Net deferred tax liabilities $ (329.5) $ (327.4)
Schedule of Reconciliation of Beginning and Ending Liability for Uncertain Tax Positions	A reconciliation of the beginning and ending amount of the consolidated liability for unrecognized income tax benefits during the year ended December 31, 2023 and 2022 is shown in the following table: Year Ended December 31, (Millions of dollars) 2023 2022 Balance at January 1 $ 0.6 $ 0.5 Additions for tax positions related to prior years — 0.2 Expiration of statutes of limitation (0.1) (0.1) Balance at December 31 $ 0.5 $ 0.6

Incentive Plans (Tables)

Incentive Plans (Tables)	12 Months Ended
Incentive Plans (Tables)	Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]
Schedule of Valuation Assumptions	Following are the assumptions used by the Company to value the original awards: Years Ended December 31, 2023 2022 2021 Fair value per option grant $ 88.53 $ 51.46 $ 32.00 Assumptions Dividend yield 0.5 % 0.6 % 0.8 % Expected volatility 33.1 % 32.2 % 32.3 % Risk-free interest rate 3.8 % 1.8 % 0.4 % Expected life (years) 4.9 4.7 4.6 Stock price at valuation date $ 263.48 $ 181.18 $ 126.00
Schedule of Changes in Stock Options Outstanding	Changes in options outstanding for Company employees during the period from December 31, 2022 to December 31, 2023 are presented in the following table: 2013 Plan — Options Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (Years) Aggregate Intrinsic Value (Millions of Dollars) Outstanding at December 31, 2022 313,950 112.06 Granted 38,100 263.48 Exercised (61,000) 77.72 Outstanding at December 31, 2023 291,050 $ 139.07 3.9 $ 63.3 Exercisable at December 31, 2023 160,550 $ 97.72 2.9 $ 41.6
Schedule of Additional Stock Option Information	Additional information about stock options outstanding at December 31, 2023 is shown below: Options Outstanding Options Exercisable Range of Exercise Prices per Option No. of Options Avg. Life Remaining in Years No. of Options Avg. Life Remaining in Years $0.00 to $99.99 68,900 2.0 68,900 2.0 $100.00 to $149.99 128,900 3.7 91,650 3.5 $150.00 to $249.99 55,150 5.1 — — $250.00 to $300.00 38,100 6.1 — — 291,050 3.9 160,550 2.9
Schedule of Restricted Stock Unit Activity	Changes in restricted stock units outstanding for Company employees during the period from December 31, 2022 to December 31, 2023 are presented in the following table: 2013 Plan — Employee RSUs Number of units Weighted Average Grant Date Fair Value Total Fair Value (Millions of Dollars) Outstanding at December 31, 2022 149,366 $ 125.51 Granted 34,935 $ 260.96 Vested and issued (60,888) $ 80.23 $ 16.1 Forfeited (4,157) $ 183.17 Outstanding at December 31, 2023 119,256 $ 186.47 $ 42.5 Changes in performance-based restricted stock units outstanding for Company employees during the period from December 31, 2022 to December 31, 2023 are presented in the following table: 2013 Plan — Employee PSU's Number of Units Weighted Average Grant Date Fair Value Total Fair Value (Millions of Dollars) Outstanding at December 31, 2022 106,001 $ 160.03 Granted 62,380 $ 296.83 Vested and issued (72,799) $ 121.83 $ 19.0 Outstanding at December 31, 2023 95,582 $ 212.38 $ 34.1 Changes in restricted stock units outstanding for Company non-employee directors during the period from December 31, 2022 to December 31, 2023 are presented in the following table: 2013 Plan — Director RSUs and DSUs Number of Units Weighted Average Grant Date Fair Value Total Fair Value (Millions of Dollars) Outstanding at December 31, 2022 26,923 $ 132.38 Granted 6,611 $ 258.35 Vested and issued (9,880) $ 110.19 $ 2.7 Outstanding at December 31, 2023, including DSUs 23,654 $ 180.97 $ 8.4 Changes in restricted stock units outstanding for Company 2023 Plan during the period from December 31, 2022 to December 31, 2023 are presented in the following table: 2023 Plan — RSUs and Director DSUs Number of Units Weighted Average Grant Date Fair Value Total Fair Value (Millions of Dollars) Outstanding at December 31, 2022 — $ — Granted 1,544 $ 335.69 Outstanding at December 31, 2023, including DSUs 1,544 $ 335.69 $ 0.6
Schedule of Amounts Recognized in Financial Statements with Respect to Share-Based Plans	Amounts recognized in the financial statements by the Company with respect to all share-based plans are shown in the following table: Years Ended December 31, (Millions of dollars) 2023 2022 2021 Compensation charged against income before income tax benefit $ 21.8 $ 16.0 $ 14.4 Related income tax benefit recognized in income $ 4.6 $ 3.4 $ 3.0

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
Earnings Per Share (Tables)	Dec. 31, 2023
Earnings Per Share [Abstract]
Schedule of Reconciliation of Basic and Diluted Earnings Per Share Computations	The following table provides a reconciliation of basic and diluted earnings per share computations for the years ended December 31, 2023, 2022 and 2021. Years ended December 31, (Millions of dollars except share and per share amounts) 2023 2022 2021 Earnings per common share: Net income per share - basic Net income attributable to common stockholders $ 556.8 $ 672.9 $ 396.9 Weighted average common shares outstanding (in thousands) 21,493 23,506 26,210 Earnings per common share $ 25.91 $ 28.63 $ 15.14 Years ended December 31, (Millions of dollars except share and per share amounts) 2023 2022 2021 Earnings per common share - assuming dilution: Net income per share - diluted Net income attributable to common stockholders $ 556.8 $ 672.9 $ 396.9 Weighted average common shares outstanding (in thousands) 21,493 23,506 26,210 Common equivalent shares: Share-based awards 350 444 394 Weighted average common shares outstanding - assuming dilution (in thousands) 21,843 23,950 26,604 Earnings per common share assuming dilution $ 25.49 $ 28.10 $ 14.92
Schedule of Potentially Dilutive Shares Excluded from Earnings Per Share	We have excluded from the earnings-per-share calculation certain stock options and shares that are considered to be anti-dilutive under the treasury stock method and are reported in the table below. Years ended December 31, Potentially dilutive shares excluded from the calculation as their inclusion would be anti-dilutive 2023 2022 2021 Stock options 34,133 — 80,500 Restricted share units 44 — 1,562 Total anti-dilutive shares 34,177 — 82,062

Other Financial Information (Ta

Other Financial Information (Tables)	12 Months Ended
Other Financial Information (Tables)	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Changes in Working Capital	CHANGES IN WORKING CAPITAL - Years ended December 31, (Millions of dollars) 2023 2022 2021 Accounts receivable $ (56.3) $ (84.7) $ (18.9) Inventories (22.1) (26.9) 11.1 Prepaid expenses and other current assets 25.2 (23.7) (3.6) Accounts payable and accrued liabilities (12.0) 180.1 102.9 Income taxes payable 23.1 — (8.7) Net decrease (increase) in noncash operating $ (42.1) $ 44.8 $ 82.8

Assets and Liabilities Measur_2

Assets and Liabilities Measure at Fair Value (Tables)	12 Months Ended
Assets and Liabilities Measure at Fair Value (Tables)	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis	The following table presents the Company's financial assets and liabilities measured at fair value on a recurring basis, as of December 31, 2023 and 2022: December 31, 2023 (Millions of dollars) Level 1 Level 2 Level 3 Fair Value Financial assets Marketable securities, current U.S. Government bonds $ — $ 3.0 $ — $ 3.0 U.S. Corporate bonds — 4.1 — 4.1 Prepaid expenses and other current assets Fuel derivative — — 0.6 0.6 Marketable securities, non-current U.S. Corporate bonds — 2.9 — 2.9 Non U.S. Government bonds — 1.5 — 1.5 Other assets Deferred compensation plan assets 12.5 — — 12.5 Financial liabilities Deferred credits and other liabilities Deferred compensation plan liabilities (20.2) — — (20.2) $ (7.7) $ 11.5 $ 0.6 $ 4.4 December 31, 2022 (Millions of dollars) Level 1 Level 2 Level 3 Fair Value Financial assets Marketable securities, current: U.S. Government bonds $ — $ 8.8 $ — $ 8.8 U.S. Corporate bonds — 6.1 — 6.1 Non U.S. Government bonds — 3.0 — 3.0 December 31, 2022 (Millions of dollars) Level 1 Level 2 Level 3 Fair Value Accounts receivable - trade: Interest rate swap derivative — — 1.3 1.3 Marketable securities, non-current U.S. Corporate bonds — 4.4 — 4.4 Other assets Deferred compensation plan assets 9.5 — — 9.5 Financial liabilities Deferred credits and other liabilities Deferred compensation plan liabilities (14.7) — — (14.7) $ (5.2) $ 22.3 $ 1.3 $ 18.4
Schedule of Carrying Amounts and Estimated Fair Value of Financial Instruments	The following table presents the carrying amounts and estimated fair values of financial instruments held by the Company at December 31, 2023 and 2022. December 31, 2023 December 31, 2022 Carrying Level 2 Carrying Level 2 (Millions of dollars) Amount Fair Value Amount Fair Value Financial liabilities Current and long-term debt, excluding finance leases $ (1,673.0) $ (1,662.9) $ (1,673.3) $ (1,643.0)

Leases (Tables)

Leases (Tables)	12 Months Ended
Leases (Tables)	Dec. 31, 2023
Leases [Abstract]
Schedule of Leases Reflected on Balance Sheet	Leases are reflected in the following balance sheet accounts: (Millions of dollars) Classification December 31, December 31, Assets Operating (Right-of-use) Operating lease right of use assets, net $ 452.1 $ 449.6 Finance Property, plant, and equipment, at cost, less accumulated depreciation of $42.6 in 2023 and $30.5 in 2022 113.8 124.6 Total leased assets $ 565.9 $ 574.2 Liabilities Current Operating Trade accounts payable and accrued liabilities $ 22.1 $ 20.5 Finance Current maturities of long-term debt 11.0 11.0 Noncurrent Operating Non-current operating lease liabilities 450.3 444.2 Finance Long-term debt, including capitalized lease obligations 115.7 122.6 Total lease liabilities $ 599.1 $ 598.3
Schedule of Lease Cost	Lease Cost: Year Ended December 31, (Millions of dollars) Classification 2023 2022 2021 Operating lease cost Store and other operating expenses $ 55.1 $ 52.2 $ 43.1 Finance lease cost Amortization of leased Depreciation & amortization expense 15.0 15.9 14.8 Interest on lease liabilities Interest expense 8.9 9.1 8.2 Net lease costs $ 79.0 $ 77.2 $ 66.1 Cash Flow Information: Year Ended December 31, (Millions of dollars) 2023 2022 2021 Cash paid for amounts included in the measurement of liabilities Operating cash flows required by operating leases $ 50.6 $ 45.6 $ 38.8 Operating cash flows required by finance leases $ 8.9 $ 9.1 $ 8.2 Financing cash flows required by finance leases $ 11.4 $ 11.2 $ 9.8 Lease Term and Discount Rate: Year Ended December 31, 2023 Weighted average remaining lease term In Years Finance leases 12.2 Operating leases 15.1 Weighted average discount rate Finance leases 6.8 % Operating leases 6.6 %
Schedule of Operating Lease Liability Maturity	Maturity of Lease Liabilities: (Millions of dollars) Operating leases Finance leases 2024 $ 53.1 $ 19.1 2025 52.4 18.0 2026 51.7 16.8 2027 50.9 16.0 2028 50.4 15.5 After 2028 535.8 106.9 Total lease payments 794.3 192.3 less: interest 321.9 65.6 Present value of lease liabilities $ 472.4 $ 126.7
Schedule of Finance Lease Liability Maturity	Maturity of Lease Liabilities: (Millions of dollars) Operating leases Finance leases 2024 $ 53.1 $ 19.1 2025 52.4 18.0 2026 51.7 16.8 2027 50.9 16.0 2028 50.4 15.5 After 2028 535.8 106.9 Total lease payments 794.3 192.3 less: interest 321.9 65.6 Present value of lease liabilities $ 472.4 $ 126.7

Business Segments (Tables)

Business Segments (Tables)	12 Months Ended
Business Segments (Tables)	Dec. 31, 2023
Segment Reporting [Abstract]
Schedule of Segment Information	Segment Information Corporate and Other Assets (Millions of dollars) Marketing Consolidated Year ended December 31, 2023 Segment income (loss) $ 630.9 $ (74.1) $ 556.8 Revenues from external customers $ 21,528.9 $ 0.5 $ 21,529.4 Investment income $ — $ 6.9 $ 6.9 Interest expense $ (8.9) $ (89.6) $ (98.5) Income tax expense (benefit) $ 203.0 $ (25.4) $ 177.6 Segment Information Corporate and Other Assets (Millions of dollars) Marketing Consolidated Significant noncash charges (credits) Depreciation and amortization $ 211.9 $ 16.8 $ 228.7 Accretion of asset retirement obligations $ 3.0 $ — $ 3.0 Deferred and noncurrent income taxes (benefits) $ (4.5) $ 6.5 $ 2.0 Additions to property, plant and equipment $ 289.5 $ 54.6 $ 344.1 Total assets at year-end $ 4,061.7 $ 278.4 $ 4,340.1 Segment Information Corporate and Other Assets (Millions of dollars) Marketing Consolidated Year ended December 31, 2022 Segment income (loss) $ 740.9 $ (68.0) $ 672.9 Revenues from external customers $ 23,445.4 $ 0.7 $ 23,446.1 Investment income $ — $ 3.0 $ 3.0 Interest expense $ (9.0) $ (76.3) $ (85.3) Income tax expense (benefit) $ 232.1 $ (21.2) $ 210.9 Significant noncash charges (credits) Depreciation and amortization $ 204.8 $ 15.6 $ 220.4 Accretion of asset retirement obligations $ 2.7 $ — $ 2.7 Deferred and noncurrent income taxes (benefits) $ 35.0 $ (3.5) $ 31.5 Additions to property, plant and equipment $ 279.1 $ 26.7 $ 305.8 Total assets at year-end $ 3,794.0 $ 329.2 $ 4,123.2 Segment Information Corporate and Other Assets (Millions of dollars) Marketing Consolidated Year ended December 31, 2021 Segment income (loss) $ 472.8 $ (75.9) $ 396.9 Revenues from external customers $ 17,359.9 $ 0.6 $ 17,360.5 Investment income $ — $ 0.1 $ 0.1 Interest expense $ (8.1) $ (74.3) $ (82.4) Income tax expense (benefit) $ 148.5 $ (23.5) $ 125.0 Significant noncash charges (credits) Depreciation and amortization $ 197.3 $ 15.3 $ 212.6 Accretion of asset retirement obligations $ 2.5 $ — $ 2.5 Deferred and noncurrent income taxes (benefits) $ 22.6 $ (3.6) $ 19.0 Additions to property, plant and equipment $ 245.5 $ 32.0 $ 277.5 Total assets at year-end $ 3,569.4 $ 478.8 $ 4,048.2

Description of Business and B_2

Description of Business and Basis of Presentation (Details)	Aug. 31, 2013	Aug. 21, 2013	Dec. 31, 2023 state store	Jan. 29, 2021 store
Product Information [Line Items]
Percentage of shares of stock distributed		100%
Ownership interest after transaction	0%
Number of stores			1,733
Number of states in which entity operates \| state			27
QuickChek
Product Information [Line Items]
Number of stores			156
Murphy
Product Information [Line Items]
Number of stores			1,577
QuickChek
Product Information [Line Items]
Percentage of equity interest acquired				100%
Number of stores				156

Significant Accounting Polici_3

Significant Accounting Policies - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Includes excise taxes of	$ 2,291.2	$ 2,180.2	$ 2,041.7
Interest costs capitalized	$ 2.4	$ 1.1	$ 2.1
LKE transaction, required term to facilitate forward agreement before proceeds are reclassified as available cash (in days)	180 days
Marketing facilities \| Minimum
Property, Plant and Equipment [Line Items]
Depreciable lives	16 years
Marketing facilities \| Maximum
Property, Plant and Equipment [Line Items]
Depreciable lives	25 years
Retail gasoline stores \| Minimum
Property, Plant and Equipment [Line Items]
Depreciable lives	3 years
Retail gasoline stores \| Maximum
Property, Plant and Equipment [Line Items]
Depreciable lives	50 years

Significant Accounting Polici_4

Significant Accounting Policies - Stock-based Compensation (Details)	12 Months Ended
	Dec. 31, 2023
Nonqualified Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	3 years
Restricted Stock And Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	3 years

Revenues - Disaggregation of Re

Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 21,529.4	$ 23,446.1	$ 17,360.5
Merchandise sales
Disaggregation of Revenue [Line Items]
Revenue	4,089.3	3,903.2	3,677.7
Operating segments \| Marketing
Disaggregation of Revenue [Line Items]
Revenue	21,528.9	23,445.4	17,359.9
Operating segments \| Marketing \| Total petroleum product sales
Disaggregation of Revenue [Line Items]
Revenue	17,104.4	19,230.1	13,410.8
Operating segments \| Marketing \| Petroleum product sales (at retail)
Disaggregation of Revenue [Line Items]
Revenue	15,279.9	17,198.9	12,022.7
Operating segments \| Marketing \| Petroleum product sales (at wholesale)
Disaggregation of Revenue [Line Items]
Revenue	1,824.5	2,031.2	1,388.1
Operating segments \| Marketing \| Merchandise sales
Disaggregation of Revenue [Line Items]
Revenue	4,089.3	3,903.2	3,677.7
Operating segments \| Marketing \| RINs
Disaggregation of Revenue [Line Items]
Revenue	328.6	305.8	265.3
Operating segments \| Marketing \| Other revenues
Disaggregation of Revenue [Line Items]
Revenue	6.6	6.3	6.1
Corporate and Other Assets
Disaggregation of Revenue [Line Items]
Revenue	$ 0.5	$ 0.7	$ 0.6

Revenues - Narrative (Details)

Revenues - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Revenues - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Earned rewards, expiration period	90 days
Trade accounts receivable	$ 336.7	$ 281.7
Receivables related to contracts with customers
Disaggregation of Revenue [Line Items]
Trade accounts receivable	$ 178.2	$ 164.1
Petroleum product sales, rack sales
Disaggregation of Revenue [Line Items]
Collection period	10 days
Renewable Identification Numbers (RINs) sales
Disaggregation of Revenue [Line Items]
Collection period	5 days
Minimum \| Petroleum product sales (at retail)
Disaggregation of Revenue [Line Items]
Collection period	2 days
Maximum \| Petroleum product sales (at retail)
Disaggregation of Revenue [Line Items]
Collection period	7 days

Inventories - Schedule of Inven

Inventories - Schedule of Inventory (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Inventory Disclosure [Abstract]
Petroleum products - FIFO basis	$ 331.2	$ 367
Store merchandise for resale - FIFO basis	209.1	192.1
Less LIFO reserve	(212.1)	(250.7)
Total petroleum products and store merchandise inventory	328.2	308.4
Materials and supplies	13	10.7
Inventories, at lower of cost or market	$ 341.2	$ 319.1

Inventories - Narrative (Detail

Inventories - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Inventory [Line Items]
Inventory, LIFO reserve	$ 212.1	$ 250.7
Petroleum Products
Inventory [Line Items]
Inventory, LIFO reserve	209.7	249.1
Store Merchandise For Resale
Inventory [Line Items]
Inventory, LIFO reserve	$ 2.4	$ 1.6

Marketable Securities - Narrati

Marketable Securities - Narrative (Details)	Dec. 31, 2023 USD ($)
Investments, Debt and Equity Securities [Abstract]
Maturity	24 months
Weighted average maturity	12 months
Net asset value	$ 1

Marketable Securities - Schedul

Marketable Securities - Schedule of Amortized Cost and Carrying Value of Marketable Securities (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	$ 11.5	$ 22.3
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated fair value, current	7.1	17.9
Estimated fair value, noncurrent	4.4	4.4
Estimated Fair Value	11.5	22.3
Marketable securities current
Debt Securities, Available-for-Sale [Line Items]
Amortized cost current	7.1	17.9
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated fair value, current	7.1	17.9
U.S. Government bonds
Debt Securities, Available-for-Sale [Line Items]
Amortized cost current	3	8.8
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated fair value, current	3	8.8
U.S. Corporate bonds
Debt Securities, Available-for-Sale [Line Items]
Amortized cost current	3.9	6
Amortized cost, noncurrent	2.9	4.4
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated fair value, current	3.9	6
Estimated fair value, noncurrent	2.9	4.4
Non U.S. Corporate bonds
Debt Securities, Available-for-Sale [Line Items]
Amortized cost current		3
Amortized cost, noncurrent	1.5
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated fair value, current		3
Estimated fair value, noncurrent	1.5
Investment income receivable
Debt Securities, Available-for-Sale [Line Items]
Amortized cost current	0.2	0.1
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated fair value, current	0.2	$ 0.1
Marketable securities non-current
Debt Securities, Available-for-Sale [Line Items]
Amortized cost, noncurrent	4.4
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Estimated fair value, noncurrent	$ 4.4

Marketable Securities - Sched_2

Marketable Securities - Schedule of Amortized Cost Basis and Fair Value of Available-for-Sale Marketable Securities (Details) $ in Millions	Dec. 31, 2023 USD ($)
Amortized Cost
Less than 1 year	$ 11.4
1 to 2 years	0
Amortized Cost	11.4
Fair Value
Less than 1 year	11.4
1 to 2 years	0
Estimated Fair Value	$ 11.4

Property, Plant and Equipment_2

Property, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Cost	$ 4,311	$ 4,012.4
Net	2,571.8	2,459.3
Depreciation expense	227.7	219.4	$ 211.6
Land
Property, Plant and Equipment [Line Items]
Cost	655.7	645.2
Net	655.7	645.2
Real estate finance leases
Property, Plant and Equipment [Line Items]
Cost	149.2	147.7
Net	110.9	122.2
Pipeline and terminal facilities
Property, Plant and Equipment [Line Items]
Cost	93.8	83.7
Net	49.9	42.5
Retail gasoline stores
Property, Plant and Equipment [Line Items]
Cost	3,136.3	2,897.7
Net	1,623.7	1,536.4
Buildings
Property, Plant and Equipment [Line Items]
Cost	74.9	71
Net	46.7	47.2
Other
Property, Plant and Equipment [Line Items]
Cost	201.1	167.1
Net	$ 84.9	$ 65.8
Minimum \| Real estate finance leases
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	1 year
Minimum \| Retail gasoline stores
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	3 years
Minimum \| Buildings
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	20 years
Minimum \| Other
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	3 years
Maximum \| Real estate finance leases
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	40 years
Maximum \| Retail gasoline stores
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	50 years
Maximum \| Buildings
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	45 years
Maximum \| Other
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	20 years

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Narrative (Details)	Dec. 31, 2023 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Tax deductible goodwill	$ 0
Pipeline space
Finite-Lived Intangible Assets [Line Items]
Useful Life (in years)	40 years

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Schedule of Changes in Goodwill (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Goodwill	$ 328	$ 328

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Intangible Assets Subject to Amortization (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Cost
Total intangible assets subject to amortization	$ 30.5	$ 30.5
Intangible assets not subject to amortization, indefinite lives:	115.4	115.6
Intangible assets, net of amortization	145.9	146.1
Net
Total intangible assets subject to amortization	24.4	24.8
Intangible assets not subject to amortization, indefinite lives:	115.4	115.6
Intangible assets, net of amortization	139.8	140.4
Trade name
Cost
Intangible assets not subject to amortization, indefinite lives:	115.4	115.4
Net
Intangible assets not subject to amortization, indefinite lives:	115.4	115.4
Liquor licenses
Cost
Intangible assets not subject to amortization, indefinite lives:	0	0.2
Net
Intangible assets not subject to amortization, indefinite lives:	$ 0	0.2
Pipeline space
Acquired Finite-Lived Intangible Assets [Line Items]
Remaining Useful Life (in years)	31 years 8 months 12 days
Cost
Cost	$ 39.6	39.6
Net
Pipeline space	$ 31.7	32.7
Intangible lease liability
Acquired Finite-Lived Intangible Assets [Line Items]
Remaining Useful Life (in years)	10 years 4 months 24 days
Cost
Intangible lease liability	$ (9.1)	(9.1)
Net
Intangible lease liability	$ (7.3)	$ (7.9)

Accounts Payable And Accrued _3

Accounts Payable And Accrued Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Payables and Accruals [Abstract]
Trade accounts payable	$ 520.3	$ 547.6
Excise taxes/withholdings payable	108.5	93.2
Accrued insurance obligations	55.9	51.8
Accrued taxes other than income	43.4	44.6
Accrued compensation and benefits	50.1	46.6
Current operating lease liabilities	22.1	20.5
Other	34.4	34.9
Accounts payable and accrued liabilities	$ 834.7	$ 839.2

Long-Term Debt - Schedule of Lo

Long-Term Debt - Schedule of Long-Term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Jan. 29, 2021	Sep. 13, 2019	Apr. 25, 2017
Debt Instrument [Line Items]
Capitalized lease obligations	$ 126.7
Unamortized debt issuance costs	(7.1)	$ (9.1)
Total long-term debt	1,799.7	1,806.9
Less current maturities	15	15
Total long-term debt, net of current	1,784.7	1,791.9
Capitalized lease obligations, autos and equipment, due through 2027
Debt Instrument [Line Items]
Capitalized lease obligations	3.1	2.3
Capitalized lease obligations, buildings, due through 2059
Debt Instrument [Line Items]
Capitalized lease obligations	123.6	131.3
Senior Notes \| 5.625% senior notes due 2027 (net of unamortized discount of $1.3 at 2023 and $1.6 at 2022)
Debt Instrument [Line Items]
Long-term debt	$ 298.7	298.4
Stated interest rate	5.625%				5.625%
Unamortized discount	$ 1.3	1.6
Senior Notes \| 4.75% senior notes due 2029 (net of unamortized discount of $3.6 at 2023 and $4.2 at 2022)
Debt Instrument [Line Items]
Long-term debt	$ 496.4	495.8
Stated interest rate	4.75%			4.75%
Unamortized discount	$ 3.6	4.2
Senior Notes \| 3.75% senior notes due 2031 (net of unamortized discount of $4.4 at 2023 and $5.1 at 2022)
Debt Instrument [Line Items]
Long-term debt	$ 495.6	494.9
Stated interest rate	3.75%		3.75%
Unamortized discount	$ 4.4	5.1
Secured Debt \| Term loan \| Term loan
Debt Instrument [Line Items]
Long-term debt	389.4	393.3
Unamortized discount	$ 0.6	$ 0.7
Effective interest rate	7.23%	5.95%

Long-Term Debt - Narrative (Det

Long-Term Debt - Narrative (Details) - USD ($)	Jul. 01, 2021	Jan. 29, 2021	Dec. 31, 2023	Dec. 31, 2022	Sep. 13, 2019	Apr. 25, 2017
Debt Instrument [Line Items]
Outstanding letters of credit			$ 10,200,000
Senior Notes \| 5.625% senior notes due 2027 (net of unamortized discount of $1.3 at 2023 and $1.6 at 2022)
Debt Instrument [Line Items]
Senior notes						$ 300,000,000
Stated interest rate			5.625%			5.625%
Senior Notes \| 4.75% senior notes due 2029 (net of unamortized discount of $3.6 at 2023 and $4.2 at 2022)
Debt Instrument [Line Items]
Senior notes					$ 500,000,000
Stated interest rate			4.75%		4.75%
Senior Notes \| 3.75% senior notes due 2031 (net of unamortized discount of $4.4 at 2023 and $5.1 at 2022)
Debt Instrument [Line Items]
Senior notes		$ 500,000,000
Stated interest rate		3.75%	3.75%
Line of Credit \| Term Facility
Debt Instrument [Line Items]
Senior notes		$ 400,000,000
Annual amortization payment		1%
Line of Credit \| Term Facility \| Federal Funds Rate
Debt Instrument [Line Items]
Spread over variable rate		0.50%
Line of Credit \| Term Facility \| One-month Adjusted Term SOFR Rate
Debt Instrument [Line Items]
Spread over variable rate		1%
Line of Credit \| Term Facility \| Adjusted SOFR Rate
Debt Instrument [Line Items]
Spread over variable rate		1.75%
Line of Credit \| Term Facility \| Alternative Base Rate
Debt Instrument [Line Items]
Spread over variable rate		0.75%
Line of Credit \| Revolving Facility
Debt Instrument [Line Items]
Aggregate commitment		$ 350,000,000
Outstanding balance			$ 390,000,000	$ 394,000,000
Principal payment period	$ 1,000,000
Outstanding under facility			$ 0
Total leverage ratio		5
Temporary increase to leverage ratio		5.5
Secured net leverage ratio financial maintenance covenants		3.75
Temporary increase to secured net leverage ratio financial maintenance covenants		4.25
Fixed charge coverage ratio		3
Actual total leverage ratio			1.68
Maximum restricted payments in cash		$ 115,600,000
Maximum consolidated net tangible assets over the life of the credit agreement		4.50%
Line of Credit \| Revolving Facility \| Federal Funds Rate
Debt Instrument [Line Items]
Spread over variable rate		0.50%
Line of Credit \| Revolving Facility \| One-month Adjusted Term SOFR Rate
Debt Instrument [Line Items]
Spread over variable rate		1%
Line of Credit \| Revolving Facility \| Adjusted SOFR Rate
Debt Instrument [Line Items]
Spread over variable rate		0.10%
Line of Credit \| Revolving Facility \| Adjusted SOFR Rate \| Minimum
Debt Instrument [Line Items]
Spread over variable rate		1.75%
Line of Credit \| Revolving Facility \| Adjusted SOFR Rate \| Maximum
Debt Instrument [Line Items]
Spread over variable rate		2.25%
Line of Credit \| Revolving Facility \| Alternative Base Rate \| Minimum
Debt Instrument [Line Items]
Spread over variable rate		0.75%
Line of Credit \| Revolving Facility \| Alternative Base Rate \| Maximum
Debt Instrument [Line Items]
Spread over variable rate		1.25%
Line of Credit \| Revolving Facility \| Floor Rate
Debt Instrument [Line Items]
Spread over variable rate		0%
Line of Credit \| Letters of credit
Debt Instrument [Line Items]
Outstanding letters of credit			$ 6,200,000

Asset Retirement Obligations _3

Asset Retirement Obligations (ARO) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Asset Retirement Obligation Roll Forward
Balance at beginning of period	$ 43.3	$ 39.2
Accretion expense	3	2.7	$ 2.5
Settlement of liabilities	(3.1)	(2.3)
Liabilities incurred	2.9	3.7
Balance at end of period	$ 46.1	$ 43.3	$ 39.2

Income Taxes - Schedule of Comp

Income Taxes - Schedule of Components of Income Before Income Taxes And Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income (loss) before income taxes	$ 734.4	$ 883.8	$ 521.9
Income tax expense (benefit)
Federal - Current	141.5	143.5	86.2
Federal - Deferred	3.5	33	14.4
State - Current and deferred	32.6	34.4	24.4
Total	$ 177.6	$ 210.9	$ 125

Income Taxes - Schedule of Reco

Income Taxes - Schedule of Reconciliation of Income Taxes To Statutory Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income tax expense based on the U.S. statutory tax rate	$ 154.2	$ 185.6	$ 109.6
State income taxes, net of federal benefit	25	28	19.2
Federal credits	(2.6)	(2.9)	(2.2)
Other, net	1	0.2	(1.6)
Total	$ 177.6	$ 210.9	$ 125

Income Taxes - Schedule of Defe

Income Taxes - Schedule of Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets
Property costs and asset retirement obligations	$ 6.4	$ 5.9
Employee benefits	12.9	10.7
Operating leases liability	99.2	97.6
Other deferred tax assets	13.5	13.6
Total gross deferred tax assets	132	127.8
Deferred tax liabilities
Accumulated depreciation and amortization	(327.9)	(316)
State deferred taxes	(29.4)	(30.5)
Operating leases right of use assets	(94.9)	(94.4)
Other deferred tax liabilities	(9.3)	(14.3)
Total gross deferred tax liabilities	(461.5)	(455.2)
Net deferred tax liabilities	$ (329.5)	$ (327.4)

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Beginning and Ending Liability For Uncertain Tax Positions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at January 1	$ 0.6	$ 0.5
Additions for tax positions related to prior years	0	0.2
Expiration of statutes of limitation	(0.1)	(0.1)
Balance at December 31	$ 0.5	$ 0.6

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Income Taxes - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Unrecognized tax benefits that would impact effective tax rate	$ 0.4	$ 0.5
Excess tax benefits	$ 2.9	$ 2.9	$ 4.9

Incentive Plans - Narrative (De

Incentive Plans - Narrative (Details)		1 Months Ended	3 Months Ended	8 Months Ended	12 Months Ended			124 Months Ended	125 Months Ended
Incentive Plans - Narrative (Details)	Aug. 30, 2013 USD ($) shares	Feb. 28, 2022 $ / shares peer_company	Mar. 31, 2023 USD ($) shares	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares	May 04, 2023 shares	Aug. 08, 2013 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)					38,100
Compensation charged against income before income tax benefit \| $					$ 21,800,000	$ 16,000,000	$ 14,400,000
Unrecognized compensation cost related to stock option awards \| $				$ 25,900,000	$ 25,900,000			$ 25,900,000	$ 25,900,000
Unrecognized compensation cost related to stock option awards, weighted average period for recognition (in years)					1 year 8 months 12 days
Total income tax benefits realized from tax deductions related to stock option exercises under share-based payment arrangements \| $					$ 800,000	$ 1,000,000	$ 300,000
2013 Long-Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares authorized for incentive plan (in shares)	5,500,000
Maximum number of shares per employee (in shares)	1,000,000
Maximum amount payable \| $	$ 5,000,000
Shares granted (in shares)								2,995,854
Shares available for grant (in shares)				2,504,146	2,504,146			2,504,146	2,504,146
MUSA 2013 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option term (in years)					7 years
MUSA 2013 Plan \| 2013 Plan — Employee RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)					3 years
MUSA 2013 Plan \| Return On Average Capital Employed Performance Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)		3 years
Restricted stock units issued, weighted average grant date fair value (in dollars per share) \| $ / shares		$ 263.48
MUSA 2013 Plan \| Total Shareholder Return Performance Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)		3 years
Number of companies in total shareholder return peer comparison group \| peer_company		17
Restricted stock units issued, weighted average grant date fair value (in dollars per share) \| $ / shares		$ 330.18
2013 Directors Plan \| Non-employee directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares authorized for incentive plan (in shares)											500,000
Shares available for grant (in shares)				342,715	342,715			342,715	342,715
Granted (in shares)									157,285
2013 Directors Plan \| 2013 Plan — Employee RSUs \| Non-employee directors \| Prior To 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)					3 years
2013 Directors Plan \| 2013 Plan — Employee RSUs \| Non-employee directors \| In 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)					1 year
2013 Directors Plan \| Deferred Stock Units (DSUs) \| Non-employee directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)					1 year
Granted (in shares)			421		2
Share of common stock right				1	1			1	1
Vested (in shares)					2
Compensation charged against income before income tax benefit \| $			$ 100,000
Outstanding (in shares)				423	423			423	423
Weighted average grant date fair value (in dollars per share) \| $ / shares				$ 258.35	$ 258.35			$ 258.35	$ 258.35
2023 Omnibus Incentive Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares authorized for incentive plan (in shares)										1,725,000
Shares granted (in shares)				1,544
Shares available for grant (in shares)				1,723,456	1,723,456			1,723,456	1,723,456
2023 Omnibus Incentive Compensation Plan \| Deferred Stock Units (DSUs) \| Non-employee directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)					1,003
Share of common stock right				1	1			1	1
Compensation charged against income before income tax benefit \| $					$ 300,000
Outstanding (in shares)				1,004	1,004			1,004	1,004
Weighted average grant date fair value (in dollars per share) \| $ / shares				$ 335.18	$ 335.18			$ 335.18	$ 335.18

Incentive Plans - Schedule of V

Incentive Plans - Schedule of Valuation Assumptions (Details) - MUSA 2013 Plan - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value per option grant (in dollars per share)	$ 88.53	$ 51.46	$ 32
Dividend yield	0.50%	0.60%	0.80%
Expected volatility	33.10%	32.20%	32.30%
Risk-free interest rate	3.80%	1.80%	0.40%
Expected life (years)	4 years 10 months 24 days	4 years 8 months 12 days	4 years 7 months 6 days
Stock price at valuation date (usd per share)	$ 263.48	$ 181.18	$ 126

Incentive Plans - Schedule of C

Incentive Plans - Schedule of Changes in Stock Options Outstanding (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023
Number of Shares (in shares)
Beginning balance (in shares)	313,950
Granted (in shares)	38,100
Exercised (in shares)	(61,000)
Ending balance (in shares)	291,050
Exercisable (in shares)	160,550
Weighted Average Exercise Price
Beginning balance (in dollars per share)	$ 112.06
Granted (in dollars per share)	263.48
Exercised (in dollars per share)	77.72
Ending balance (in dollars per share)	139.07
Exercisable (in dollars per share)	$ 97.72
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding, weighted average remaining contractual term (in years)	3 years 10 months 24 days
Exercisable, weighted average remaining contractual term (in years)	2 years 10 months 24 days
Aggregate Intrinsic Value (Millions of Dollars)
Outstanding, aggregate intrinsic value	$ 63.3
Exercisable, aggregate intrinsic value	$ 41.6

Incentive Plans - Schedule of A

Incentive Plans - Schedule of Additional Stock Option Information (Details)	12 Months Ended
	Dec. 31, 2023 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)	291,050
Options outstanding, average remaining life (in years)	3 years 10 months 24 days
Options exercisable (in shares)	160,550
Options exercisable, average remaining life (in years)	2 years 10 months 24 days
0
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Lower range limit of exercise price (in dollars per share) \| $ / shares	$ 0
Upper range limit of exercise price (in dollars per share) \| $ / shares	$ 99.99
Options outstanding (in shares)	68,900
Options outstanding, average remaining life (in years)	2 years
Options exercisable (in shares)	68,900
Options exercisable, average remaining life (in years)	2 years
100
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Lower range limit of exercise price (in dollars per share) \| $ / shares	$ 100
Upper range limit of exercise price (in dollars per share) \| $ / shares	$ 149.99
Options outstanding (in shares)	128,900
Options outstanding, average remaining life (in years)	3 years 8 months 12 days
Options exercisable (in shares)	91,650
Options exercisable, average remaining life (in years)	3 years 6 months
150
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Lower range limit of exercise price (in dollars per share) \| $ / shares	$ 150
Upper range limit of exercise price (in dollars per share) \| $ / shares	$ 249.99
Options outstanding (in shares)	55,150
Options outstanding, average remaining life (in years)	5 years 1 month 6 days
Options exercisable (in shares)	0
Options exercisable, average remaining life (in years)	0 years
250
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Lower range limit of exercise price (in dollars per share) \| $ / shares	$ 250
Upper range limit of exercise price (in dollars per share) \| $ / shares	$ 300
Options outstanding (in shares)	38,100
Options outstanding, average remaining life (in years)	6 years 1 month 6 days
Options exercisable (in shares)	0
Options exercisable, average remaining life (in years)	0 years

Incentive Plans - Schedule of R

Incentive Plans - Schedule of Restricted Stock Unit Activity (Details) $ / shares in Units, $ in Millions	12 Months Ended	125 Months Ended
	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares
2013 Plan — Employee RSUs and PSUs \| 2013 Plan — Employee RSUs \| Employees
Number of units
Beginning balance (in shares)	149,366
Granted (in shares)	34,935
Vested (in shares)	(60,888)
Forfeited (in shares)	(4,157)
Ending balance (in shares)	119,256	119,256
Weighted Average Grant Date Fair Value (in dollars per share)
Beginning balance (in dollars per share) \| $ / shares	$ 125.51
Granted (in dollars per share) \| $ / shares	260.96
Vested (in dollars per share) \| $ / shares	80.23
Forfeited (in dollars per share) \| $ / shares	183.17
Ending balance (in dollars per share) \| $ / shares	$ 186.47	$ 186.47
Total Fair Value
Total fair value vested \| $	$ 16.1
Total fair value, outstanding \| $	$ 42.5	$ 42.5
2013 Plan — Employee RSUs and PSUs \| 2013 Plan — Employee PSU's \| Employees
Number of units
Beginning balance (in shares)	106,001
Granted (in shares)	62,380
Vested (in shares)	(72,799)
Issued (in shares)	(72,799)
Ending balance (in shares)	95,582	95,582
Weighted Average Grant Date Fair Value (in dollars per share)
Beginning balance (in dollars per share) \| $ / shares	$ 160.03
Granted (in dollars per share) \| $ / shares	296.83
Vested (in dollars per share) \| $ / shares	121.83
Issued (in dollars per share) \| $ / shares	121.83
Ending balance (in dollars per share) \| $ / shares	$ 212.38	$ 212.38
Total Fair Value
Total fair value vested \| $	$ 19
Total fair value issued \| $	19
Total fair value, outstanding \| $	$ 34.1	$ 34.1
2013 Directors Plan \| Non-employee directors
Number of units
Granted (in shares)		157,285
2013 Directors Plan \| 2023 Plan — RSUs and Director DSUs \| Non-employee directors
Number of units
Beginning balance (in shares)	26,923
Granted (in shares)	6,611
Vested (in shares)	(9,880)
Issued (in shares)	(9,880)
Ending balance (in shares)	23,654	23,654
Weighted Average Grant Date Fair Value (in dollars per share)
Beginning balance (in dollars per share) \| $ / shares	$ 132.38
Granted (in dollars per share) \| $ / shares	258.35
Vested (in dollars per share) \| $ / shares	110.19
Issued (in dollars per share) \| $ / shares	110.19
Ending balance (in dollars per share) \| $ / shares	$ 180.97	$ 180.97
Total Fair Value
Total fair value vested \| $	$ 2.7
Total fair value issued \| $	2.7
Total fair value, outstanding \| $	$ 8.4	$ 8.4
MUSA 2023 Plan \| 2023 Plan — RSUs and Director DSUs \| Non-employee directors
Number of units
Beginning balance (in shares)	0
Granted (in shares)	1,544
Ending balance (in shares)	1,544	1,544
Weighted Average Grant Date Fair Value (in dollars per share)
Beginning balance (in dollars per share) \| $ / shares	$ 0
Granted (in dollars per share) \| $ / shares	335.69
Ending balance (in dollars per share) \| $ / shares	$ 335.69	$ 335.69
Total Fair Value
Total fair value, outstanding \| $	$ 0.6	$ 0.6

Incentive Plans - Schedule of_2

Incentive Plans - Schedule of Amounts Recognized in Financial Statements with Respect to Share-Based Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-Based Payment Arrangement [Abstract]
Compensation charged against income before income tax benefit	$ 21.8	$ 16	$ 14.4
Related income tax benefit recognized in income	$ 4.6	$ 3.4	$ 3

Employee and Retiree Benefit _2

Employee and Retiree Benefit Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Supplemental Executive Retirement Plan
Defined Contribution Plan Disclosure [Line Items]
Liability for retirement plan	$ 7.6	$ 5.5
Profit Sharing Plan
Defined Contribution Plan Disclosure [Line Items]
Profit sharing contributions		1.6	$ 1.1
Thrift Plan
Defined Contribution Plan Disclosure [Line Items]
Company matching contribution	100%
Employee's maximum contribution matched by Company	6%
Combined expenses	$ 23.8	$ 17.3	$ 16.9
Thrift Plan \| Minimum
Defined Contribution Plan Disclosure [Line Items]
Profit sharing percentage	3%
Thrift Plan \| Maximum
Defined Contribution Plan Disclosure [Line Items]
Profit sharing percentage	9%
Thrift Plan \| QuickChek \| Matching rate one
Defined Contribution Plan Disclosure [Line Items]
Company matching contribution		100%	100%
Employee's maximum contribution matched by Company		3%	3%
Thrift Plan \| QuickChek \| Matching rate two
Defined Contribution Plan Disclosure [Line Items]
Company matching contribution		50%	50%
Employee's maximum contribution matched by Company		2%	2%

Financial Instruments and Ris_2

Financial Instruments and Risk Management (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Cash deposits related to commodity derivative contracts	$ 1,000,000	$ 0
Interest rate swap derivative
Derivatives, Fair Value [Line Items]
Amortization of unrealized gain to interest expense	$ 600,000	$ (900,000)	$ (900,000)

Earnings Per Share - Narrative

Earnings Per Share - Narrative (Details) - USD ($)	12 Months Ended
Earnings Per Share - Narrative (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	May 02, 2023	Dec. 01, 2021	Oct. 31, 2020
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, shares acquired (in shares)	1,026,300	3,328,795	2,398,477
Common stock acquired	$ 336,200,000	$ 806,400,000	$ 355,000,000
Stock repurchase program, average price per share (in dollars per share)	$ 327.55	$ 242.24	$ 148
2022 Shares Repurchased Program
Equity, Class of Treasury Stock [Line Items]
Share repurchase authorization (in shares)					$ 1,000,000,000
Stock repurchase program, shares acquired (in shares)	698,075
Common stock acquired	$ 215,500,000
Stock repurchase program, average price per share (in dollars per share)	$ 308.69
October 2020 Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Share repurchase authorization (in shares)						$ 500,000,000
2023 Authorization
Equity, Class of Treasury Stock [Line Items]
Share repurchase authorization (in shares)	$ 1,500,000,000			$ 1,500,000,000
Stock repurchase program, shares acquired (in shares)	328,225
Common stock acquired	$ 120,700,000
Stock repurchase program, average price per share (in dollars per share)	$ 367.66
Stock repurchase program, remaining amount	$ 1,400,000,000

Earnings Per Share - Reconcilia

Earnings Per Share - Reconciliation of Basic and Diluted Earnings Per Share Computations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Earnings per common share:
Net income attributable to common stockholders	$ 556.8	$ 672.9	$ 396.9
Weighted average common shares outstanding (in shares)	21,493	23,506	26,210
Earnings per common share (in dollars per share)	$ 25.91	$ 28.63	$ 15.14
Earnings per common share - assuming dilution:
Net income attributable to common stockholders	$ 556.8	$ 672.9	$ 396.9
Weighted average common shares outstanding (in shares)	21,493	23,506	26,210
Common equivalent shares:
Share-based awards (in shares)	350	444	394
Weighted average common shares outstanding - assuming dilution (in shares)	21,843	23,950	26,604
Earnings per common share assuming dilution (in dollars per share)	$ 25.49	$ 28.10	$ 14.92

Earnings Per Share - Potentiall

Earnings Per Share - Potentially Dilutive Shares Excluded from Earnings Per Share (Details) - shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	34,177	0	82,062
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	34,133	0	80,500
Restricted share units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	44	0	1,562

Other Financial Information - N

Other Financial Information - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash income taxes paid (collected), net of refunds	$ 128	$ 199.7	$ 120.4
Interest paid, net of amounts capitalized	$ 92.3	$ 81.6	$ 70.8

Other Financial Information - S

Other Financial Information - Schedule of Changes in Working Capital (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accounts receivable	$ (56.3)	$ (84.7)	$ (18.9)
Inventories	(22.1)	(26.9)	11.1
Prepaid expenses and other current assets	25.2	(23.7)	(3.6)
Accounts payable and accrued liabilities	(12)	180.1	102.9
Income taxes payable	23.1	0	(8.7)
Net decrease (increase) in noncash operating working capital	$ (42.1)	$ 44.8	$ 82.8

Assets and Liabilities Measured

Assets and Liabilities Measured at Fair Value (Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Financial assets
Marketable securities, current	$ 7.1	$ 17.9
U.S. Corporate bonds	4.4	4.4
Recurring
Financial assets
Derivatives		1.3
Financial liabilities
Fair value, net asset (liability)	4.4	18.4
Recurring \| Fuel derivative
Financial assets
Derivatives	0.6
Recurring \| Deferred compensation plan liabilities
Financial liabilities
Deferred compensation plan liabilities	(20.2)	(14.7)
Recurring \| Deferred compensation plan assets
Financial assets
Deferred compensation plan assets	12.5	9.5
Recurring \| U.S. Government bonds
Financial assets
Marketable securities, current	3	8.8
Recurring \| U.S. Corporate bonds
Financial assets
Marketable securities, current	4.1	6.1
U.S. Corporate bonds	2.9	4.4
Recurring \| Non U.S. Government bonds
Financial assets
Marketable securities, current		3
U.S. Corporate bonds	1.5
Recurring \| Level 1
Financial assets
Derivatives		0
Financial liabilities
Fair value, net asset (liability)	(7.7)	(5.2)
Recurring \| Level 1 \| Fuel derivative
Financial assets
Derivatives	0
Recurring \| Level 1 \| Deferred compensation plan liabilities
Financial liabilities
Deferred compensation plan liabilities	(20.2)	(14.7)
Recurring \| Level 1 \| Deferred compensation plan assets
Financial assets
Deferred compensation plan assets	12.5	9.5
Recurring \| Level 1 \| U.S. Government bonds
Financial assets
Marketable securities, current	0	0
Recurring \| Level 1 \| U.S. Corporate bonds
Financial assets
Marketable securities, current	0	0
U.S. Corporate bonds	0	0
Recurring \| Level 1 \| Non U.S. Government bonds
Financial assets
Marketable securities, current		0
U.S. Corporate bonds	0
Recurring \| Level 2
Financial assets
Derivatives		0
Financial liabilities
Fair value, net asset (liability)	11.5	22.3
Recurring \| Level 2 \| Fuel derivative
Financial assets
Derivatives	0
Recurring \| Level 2 \| Deferred compensation plan liabilities
Financial liabilities
Deferred compensation plan liabilities	0	0
Recurring \| Level 2 \| Deferred compensation plan assets
Financial assets
Deferred compensation plan assets	0	0
Recurring \| Level 2 \| U.S. Government bonds
Financial assets
Marketable securities, current	3	8.8
Recurring \| Level 2 \| U.S. Corporate bonds
Financial assets
Marketable securities, current	4.1	6.1
U.S. Corporate bonds	2.9	4.4
Recurring \| Level 2 \| Non U.S. Government bonds
Financial assets
Marketable securities, current		3
U.S. Corporate bonds	1.5
Recurring \| Level 3
Financial assets
Derivatives		1.3
Financial liabilities
Fair value, net asset (liability)	0.6	1.3
Recurring \| Level 3 \| Fuel derivative
Financial assets
Derivatives	0.6
Recurring \| Level 3 \| Deferred compensation plan liabilities
Financial liabilities
Deferred compensation plan liabilities	0	0
Recurring \| Level 3 \| Deferred compensation plan assets
Financial assets
Deferred compensation plan assets	0	0
Recurring \| Level 3 \| U.S. Government bonds
Financial assets
Marketable securities, current	0	0
Recurring \| Level 3 \| U.S. Corporate bonds
Financial assets
Marketable securities, current	0	0
U.S. Corporate bonds	0	0
Recurring \| Level 3 \| Non U.S. Government bonds
Financial assets
Marketable securities, current		$ 0
U.S. Corporate bonds	$ 0

Assets and Liabilities Measur_3

Assets and Liabilities Measure at Fair Value - Schedule of Carrying Amounts and Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Current and long-term debt, excluding finance leases	$ (1,673)	$ (1,673.3)
Fair Value \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Current and long-term debt, excluding finance leases	$ (1,662.9)	$ (1,643)

Commitments (Details)

Commitments (Details) - USD ($) $ in Millions	12 Months Ended
Commitments (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating leases
2024	$ 53.1
2025	52.4
2026	51.7
2027	50.9
2028	50.4
Rental expense for noncancelable operating leases	$ 60.7	$ 57.6	$ 48.7

Commitments - Other Commitments

Commitments - Other Commitments (Details) $ in Millions	12 Months Ended
Commitments - Other Commitments (Details) $ in Millions	Dec. 31, 2023 USD ($)
Take-Or-Pay Contracts
Other Commitments [Line Items]
Term of take-or-pay contract	6 years 9 months 18 days
Minimum annual payments under take-or-pay contracts, fiscal year maturity
2024	$ 8.3
2025	8.3
2026	6.8
2027	4.7
2028	4.7
Capital Addition Purchase Commitments
Other Commitments [Line Items]
Commitments for capital expenditures	301.9
Construction in Progress
Other Commitments [Line Items]
Commitments for capital expenditures	265
Building Improvements
Other Commitments [Line Items]
Commitments for capital expenditures	$ 16.7

Contingencies (Details)

Contingencies (Details) $ in Millions	12 Months Ended
Contingencies (Details) $ in Millions	Dec. 31, 2023 USD ($) superfund_site
Commitments and Contingencies Disclosure [Abstract]
Number of Superfund sites for which company may be liable \| superfund_site	1
Workers' compensation deductible (per occurrence)	$ 1
General liability insurance deductible	3
Auto liability insurance deductible	0.3
Workers' compensation accrued liability	47.3
Outstanding letters of credit	$ 10.2

Leases - Narrative (Details)

Leases - Narrative (Details)	12 Months Ended
Leases - Narrative (Details)	Dec. 31, 2023 lease renewalOption
Lessee, Lease, Description [Line Items]
Number of renewal options \| renewalOption	1
Number of leases with restrictive covenants	102
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	1 year
Lease renewal term	5 years
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	38 years
Lease renewal term	20 years
Land
Lessee, Lease, Description [Line Items]
Number of leases	445
Terminal
Lessee, Lease, Description [Line Items]
Number of leases	1

Leases - Leases Reflected on Ba

Leases - Leases Reflected on Balance Sheet (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) lease	Dec. 31, 2022 USD ($)
Assets
Operating (Right-of-use)	$ 452.1	$ 449.6
Finance	113.8	124.6
Total leased assets	$ 565.9	574.2
Number of leases with restrictive covenants \| lease	102
Accumulated depreciation	$ 42.6	30.5
Current
Operating	22.1	20.5
Finance	11	11
Noncurrent
Operating	450.3	444.2
Finance	115.7	122.6
Total lease liabilities	$ 599.1	$ 598.3
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Trade accounts payable and accrued liabilities	Trade accounts payable and accrued liabilities
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Current maturities of long-term debt	Current maturities of long-term debt
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Long-term debt, including capitalized lease obligations	Long-term debt, including capitalized lease obligations

Leases - Lease Cost (Details)

Leases - Lease Cost (Details) - USD ($) $ in Millions	12 Months Ended
Leases - Lease Cost (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Operating lease cost	$ 55.1	$ 52.2	$ 43.1
Finance lease cost
Amortization of leased assets	15	15.9	14.8
Interest on lease liabilities	8.9	9.1	8.2
Net lease costs	$ 79	$ 77.2	$ 66.1

Leases - Cash Flow Information

Leases - Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash paid for amounts included in the measurement of liabilities
Operating cash flows required by operating leases	$ 50.6	$ 45.6	$ 38.8
Operating cash flows required by finance leases	8.9	9.1	8.2
Financing cash flows required by finance leases	$ 11.4	$ 11.2	$ 9.8

Leases - Maturity of Lease Liab

Leases - Maturity of Lease Liability (Details) $ in Millions	Dec. 31, 2023 USD ($)
Operating leases
2024	$ 53.1
2025	52.4
2026	51.7
2027	50.9
2028	50.4
After 2028	535.8
Total lease payments	794.3
less: interest	321.9
Present value of lease liabilities	472.4
Finance leases
2024	19.1
2025	18
2026	16.8
2027	16
2028	15.5
After 2028	106.9
Total lease payments	192.3
less: interest	65.6
Present value of lease liabilities	$ 126.7

Leases - Lease Term and Discoun

Leases - Lease Term and Discount Rate (Details)	Dec. 31, 2023
Weighted average remaining lease term
Finance leases	12 years 2 months 12 days
Operating leases	15 years 1 month 6 days
Weighted average discount rate
Finance leases	6.80%
Operating leases	6.60%

Business Segments - Narrative (

Business Segments - Narrative (Details)	12 Months Ended
Business Segments - Narrative (Details)	Dec. 31, 2023 segment
Segment Reporting [Abstract]
Number of operating segments	1

Business Segments - Schedule of

Business Segments - Schedule of Segment Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Segment income (loss)	$ 556.8	$ 672.9	$ 396.9
Revenues from external customers	21,529.4	23,446.1	17,360.5
Investment income	6.9	3	0.1
Interest expense	(98.5)	(85.3)	(82.4)
Income tax expense (benefit)	177.6	210.9	125
Significant noncash charges (credits)
Depreciation and amortization	228.7	220.4	212.6
Accretion of asset retirement obligations	3	2.7	2.5
Deferred and noncurrent income taxes (benefits)	2	31.5	19
Additions to property, plant and equipment	344.1	305.8	277.5
Total assets at year-end	4,340.1	4,123.2	4,048.2
Operating segments \| Marketing
Segment Reporting Information [Line Items]
Segment income (loss)	630.9	740.9	472.8
Revenues from external customers	21,528.9	23,445.4	17,359.9
Investment income	0	0	0
Interest expense	(8.9)	(9)	(8.1)
Income tax expense (benefit)	203	232.1	148.5
Significant noncash charges (credits)
Depreciation and amortization	211.9	204.8	197.3
Accretion of asset retirement obligations	3	2.7	2.5
Deferred and noncurrent income taxes (benefits)	(4.5)	35	22.6
Additions to property, plant and equipment	289.5	279.1	245.5
Total assets at year-end	4,061.7	3,794	3,569.4
Corporate and Other Assets
Segment Reporting Information [Line Items]
Segment income (loss)	(74.1)	(68)	(75.9)
Revenues from external customers	0.5	0.7	0.6
Investment income	6.9	3	0.1
Interest expense	(89.6)	(76.3)	(74.3)
Income tax expense (benefit)	(25.4)	(21.2)	(23.5)
Significant noncash charges (credits)
Depreciation and amortization	16.8	15.6	15.3
Accretion of asset retirement obligations	0	0	0
Deferred and noncurrent income taxes (benefits)	6.5	(3.5)	(3.6)
Additions to property, plant and equipment	54.6	26.7	32
Total assets at year-end	$ 278.4	$ 329.2	$ 478.8

Schedule II - Valuation And Q_2

Schedule II - Valuation And Qualifying Accounts (Details) - Allowance for doubtful accounts - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at January 1,	$ 0.3	$ 0.1	$ 0.1
Charged (Credited) to Expense	1	0.2	0
Deductions	0	0	0
Balance at December 31,	$ 1.3	$ 0.3	$ 0.1