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