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Income Tax Expense (Additional Information) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2025 | Dec. 31, 2024
Operating Loss Carryforwards [Line Items] |  |
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | $ 3 |
Unrecognized Tax Benefits that would Impact Effective Tax Rate, Net of Federal Benefits | 2 |
Income Tax Examination, Penalties and Interest Expense | 3 |
Income Tax Examination, Penalties and Interest Accrued |  | $ 1
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions | $ 8 |
Income Tax Examination, Description | The IRS closed its audit of a 2018 income tax refund claim filed by a wholly owned subsidiary of Sunoco with no change. In general, Sunoco and its U.S. subsidiaries are no longer subject to examination by the IRS and most state jurisdictions for the 2020 and prior tax years. Sunoco’s non-U.S. subsidiaries may be subject to examination in their local taxing jurisdictions for periods ranging from 3 to 12 years from the date the tax return is filed. |
Deferred Tax Asset, Interest Carryforward | $ 159 |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | 62 |
Sunoco Retail LLC |  |
Operating Loss Carryforwards [Line Items] |  |
Operating Loss Carryforwards | 287 |
Sunoco Retail LLC | Limited Under IRC §382 |  |
Operating Loss Carryforwards [Line Items] |  |
Operating Loss Carryforwards | 206 |
Sunoco Retail LLC | separate return limitation year |  |
Operating Loss Carryforwards [Line Items] |  |
Operating Loss Carryforwards | 35 |
Foreign |  |
Operating Loss Carryforwards [Line Items] |  |
Tax Credit Carryforward, Valuation Allowance | 52 |
Foreign | Sunoco Retail LLC |  |
Operating Loss Carryforwards [Line Items] |  |
Operating Loss Carryforwards | 425 |
Foreign | Sunoco Retail LLC | Expiration between 2026 and 2045 |  |
Operating Loss Carryforwards [Line Items] |  |
Operating Loss Carryforwards | 279 |
Federeal |  |
Operating Loss Carryforwards [Line Items] |  |
Tax Credit Carryforward, Valuation Allowance | 10 |
State | Corporate subsidiaries | Expiration between 2026 and 2044 |  |
Operating Loss Carryforwards [Line Items] |  |
Operating Loss Carryforwards | $ 6 |

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- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible interest carryforward. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-6 + Details
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- Definition A brief description of status of the tax examination, significant findings to date, and the entity's position with respect to the findings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-15 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-3 + Details
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