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Trade Names [Member] Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Inventories, at lower of cost or market Total inventories Inventory, Net Award Type [Domain] Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Interest on lease liabilities Finance Lease, Interest Expense 2026 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Assets and Liabilities Measured at Fair Value Fair Value Disclosures [Text Block] Level 3 Fair Value, Inputs, Level 3 [Member] Expected life (years) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Repurchased (in shares) Treasury Stock, Shares, Acquired Stock price at valuation date (in dollars per share) Share Price PEO Name PEO Name Murphy USA, Two Thousand Thirteen Plan Murphy USA, Two Thousand Thirteen Plan [Member] Murphy USA, Two Thousand Thirteen Plan Petroleum product sales (at retail) Product Sales, Petroleum, Retail [Member] Product Sales, Petroleum, Retail [Member] Other segment items Segment Reporting, Other Segment Item, Amount Property, Plant and Equipment, Type [Axis] Long-Lived Asset, Class [Axis] Weighted average remaining lease term (years) Weighted Average Remaining Lease Term [Abstract] Weighted Average Remaining Lease Term [Abstract] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Maximum restricted payments in cash Debt Instrument, Covenant Compliance, Payment Restriction, Net Tangible Assets Debt Instrument, Covenant Compliance, Payment Restriction, Net Tangible Assets Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Purchase of treasury stock Treasury Stock, Value, Acquired, Cost Method Cash payments 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[Abstract] Product and Service [Axis] Product and Service [Axis] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Expected volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Total fair value issued Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Issued In Period, Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Issued In Period, Fair Value Operating lease cost Operating Lease, Cost Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover page. Cover [Abstract] Dividend yield Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Equity Awards Adjustments Equity Awards Adjustments [Member] Total leased assets Lease, Right-of-Use Asset Lease, Right-of-Use Asset Total liabilities and stockholders' equity Liabilities and Equity ROACE Performance Units Return On Average Capital Employed Performance Units [Member] Return On Average Capital Employed Performance Units [Member] Stock Options Share-Based Payment Arrangement, Option [Member] Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Charges incurred during the period Restructuring Charges Plan Name [Axis] Plan Name [Axis] Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Tabular List, Table Tabular List [Table Text Block] Vesting [Axis] Vesting [Axis] Additional paid in capital (APIC) Additional Paid in Capital Net Intangible Asset, Finite-Lived, after Accumulated Amortization [Abstract] Other nonoperating income (expense) Other nonoperating (income) expense Other Nonoperating Income (Expense) Long-Term Debt Long-Term Debt [Text Block] Accretion of asset retirement obligations Accretion of asset retirement obligations Accretion expense Asset Retirement Obligation, Accretion Expense Asset Retirement Obligation Roll Forward Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] Name Awards Close in Time to MNPI Disclosures, Individual Name Stockholders' Equity Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Outstanding, aggregate intrinsic value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Property, Plant and Equipment, Type [Domain] Long-Lived Asset, Class [Domain] Marketing Marketing Segment Marketing Segment [Member] Marketing Segment [Member] MUSA 2013 Plan Murphy USA 2013 Long-Term Incentive Plan [Member] Murphy USA 2013 Long-Term Incentive Plan Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Materials and supplies Inventory, Raw Materials and Supplies, Gross Preferred Stock, par $0.01 (authorized 20,000,000 shares, none outstanding) Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Schedule of Changes in Working Capital Cash Flow, Operating Capital [Table Text Block] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Workers' compensation deductible (per occurrence) Workers Compensation Insurance, Deductible Workers Compensation Insurance, Deductible Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Operating cash flows required by finance leases Finance Lease, Interest Payment on Liability Interest paid, net of amounts capitalized Interest Paid, Excluding Capitalized Interest, Operating Activity Property additions Payments to Acquire Productive Assets Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Trade Accounts Receivable Trade Accounts Receivable [Member] Inventory [Line Items] Inventory [Line Items] Credit Facility [Axis] Credit Facility [Axis] Restructuring Expenses Restructuring and Related Activities Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Long-term debt, including capitalized lease obligations Total long-term debt, net of current Long-Term Debt and Lease Obligation Name Measure Name Income Taxes Income Tax Disclosure [Text Block] Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] APIC Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Indefinite-lived Intangible Assets [Axis] Intangible Asset, Indefinite-Lived, Class [Axis] Murphy Murphy [Member] Murphy Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent Finance leases Finance Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Operating lease, liability, current, statement of financial position [extensible List] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Company Selected Measure Amount Company Selected Measure Amount TSR Performance Units Total Shareholder Return Performance Units [Member] Total Shareholder Return Performance Units [Member] Investments, Debt and Equity Securities [Abstract] Prior to 2023 Awards Prior To 2023 [Member] Awards Prior To 2023 Adjusted SOFR Rate Secured Overnight Financing Rate (SOFR) [Member] Current assets Assets, Current [Abstract] Operating leases Operating Lease, Weighted Average Remaining Lease Term Non-PEO NEO Non-PEO NEO [Member] Senior Notes Senior Notes [Member] Entity Address, Address Line One Entity Address, Address Line One Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Income tax expense (benefit) Total income tax expense (benefit) Income Tax Expense (Benefit) Cost of goods sold Cost of goods sold Cost of Product and Service Sold Award Timing Method Award Timing Method [Text Block] Net increase (decrease) in cash, cash equivalents, and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Other operating revenues Product and Service, Other [Member] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Net Income Net income Net income attributable to common stockholders Income before income taxes Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Unamortized debt issuance costs Unamortized Debt Issuance Expense Proceeds from sale of assets Proceeds from Sale of Property, Plant, and Equipment Statement [Table] Statement [Table] TSR Share-Based Payment Arrangement, Tranche Two [Member] Restatement Determination Date: Restatement Determination Date [Axis] Collection period Contract with Customer, Receivables, Collection Period Contract with Customer, Receivables, Collection Period Non-employee directors Share-Based Payment Arrangement, Nonemployee [Member] Petroleum product sales, rack sales Product Sales, Petroleum, Wholesale Rack Sales [Member] Product Sales, Petroleum, Wholesale Rack Sales [Member] Exercisable (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Lease Accounting Lessee, Leases [Policy Text Block] Operating Revenues Revenues [Abstract] Federal - Current Current Federal Tax Expense (Benefit) Share of common stock right Share-Based Compensation Arrangement by Share-Based Payment Award, Award Share Issuance Ratio Share-Based Compensation Arrangement by Share-Based Payment Award, Award Share Issuance Ratio Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract]