v3.26.1
Investment in Unconsolidated Affiliates (Details)
$ in Millions
 3 Months Ended
Mar. 31, 2026
USD ($)
Mar. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
Schedule of Equity Method Investments [Line Items]      
Investments in unconsolidated affiliates $ 1,611   $ 1,624
Equity in earnings of unconsolidated affiliates 42 $ 32  
Revenues $ 10,690 5,179  
Miles of pipeline 14,000    
Caribbean [Member]      
Schedule of Equity Method Investments [Line Items]      
FIFO Inventory Amount $ 165   88
ET-S Permian joint venture      
Schedule of Equity Method Investments [Line Items]      
Investments in unconsolidated affiliates 1,147   1,161
Equity in earnings of unconsolidated affiliates $ 37 30  
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.    
Miles of pipeline 5,000    
J.C. Nolan Joint Venture      
Schedule of Equity Method Investments [Line Items]      
Investments in unconsolidated affiliates $ 119   121
Equity in earnings of unconsolidated affiliates $ 2 2  
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.    
Miles of pipeline 500    
Storage capacity 130,000    
Throughput capacity 36,000    
SARA      
Schedule of Equity Method Investments [Line Items]      
Investments in unconsolidated affiliates $ 140   141
Equity in earnings of unconsolidated affiliates $ 1 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 $ 176   $ 171
Equity in earnings of unconsolidated affiliates $ 3 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.    
Number of retail locations 200    
ET-S Permian joint venture      
Schedule of Equity Method Investments [Line Items]      
Revenues [1] $ 7,138 3,460  
Related Party | ET-S Permian joint venture      
Schedule of Equity Method Investments [Line Items]      
Revenues $ 7,040 $ 3,360  
[1] Includes transactions with affiliates for the three months ended March 31, 2026 and 2025 of $7.04 billion and $3.36 billion, respectively.