Investments in Unconsolidated Affiliates (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated affiliates	$ 1,624	$ 1,335
Equity in earnings of unconsolidated affiliates	143	60	$ 5
Total assets	28,362	14,375
Total liabilities and equity	28,362	14,375
Assets, Current	5,516	2,465
Other non-current assets	928	400
Liabilities, Current	3,997	1,947
Revenues	25,201	22,693	23,068
Net income (loss) and comprehensive income (loss)	527	874	394
Equity Method Investments
Schedule of Equity Method Investments [Line Items]
Total assets	4,784	4,502
Total liabilities and equity	4,784	4,502
Assets, Current	511	650
Equity Method Investment Summarized Financial Information Property, Plant and Equipment, Net	3,912	3,542
Other non-current assets	361	310
Liabilities, Current	375	477
Liabilities, Noncurrent	159	49
Equity, Including Portion Attributable to Noncontrolling Interest	4,250	3,976
Revenues	21,022	8,267	34
Equity Method Investments Summarized Financial Information, Operating Income	444	176	10
Net income (loss) and comprehensive income (loss)	437	176	10
J.C. Nolan Joint Venture
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated affiliates	121	123
Equity in earnings of unconsolidated affiliates	$ 7	7	5
Equity Method Investment, Ownership Percentage	50.00%
Equity Method Investment, Description of Principal Activities	Sunoco owns a 50% interest in J.C. Nolan, which provides diesel fuel storage in Midland, Texas with storage capacity of 130,000 barrels and transports diesel fuel from a tank farm in Hebert, Texas to Midland, Texas, on a 500 mile pipeline with a throughput capacity of approximately 36 thousand barrels per day.
Permian Joint Vennture
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated affiliates	$ 1,161	1,212
Equity in earnings of unconsolidated affiliates	$ 134	53	0
Equity Method Investment, Ownership Percentage	32.50%
Equity Method Investment, Description of Principal Activities	Sunoco owns a 32.5% interest in ET-S Permian, which operates more than 5,000 miles of crude oil and water gathering pipelines with crude oil storage capacity in excess of 11 million barrels.
SARA
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated affiliates	$ 141	0
Equity in earnings of unconsolidated affiliates	$ 1	0	0
Equity Method Investment, Ownership Percentage	29.00%
Equity Method Investment, Description of Principal Activities	Sunoco owns a 29% interest in SARA, which is a refinery based in Martinique with operations to sell refined crude oil in Guadeloupe, French Guiana and Martinique.
Isla
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated affiliates	$ 171	0
Equity in earnings of unconsolidated affiliates	$ 2	0	0
Equity Method Investment, Ownership Percentage	50.00%
Equity Method Investment, Description of Principal Activities	Sunoco owns a 50% interest in Isla, which is comprised of over 200 retail locations alongside an integrated commercial and aviation business in Dominican Republic.
Others
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated affiliates	$ 30	0
Equity in earnings of unconsolidated affiliates	$ (1)	$ 0	$ 0