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Reportable Segments (Advances to and investments in affiliates) (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Segment Reporting Information [Line Items]      
Investments in unconsolidated affiliates [1] $ 3,266 $ 3,097 $ 2,893
Intrastate Transportation and Storage      
Segment Reporting Information [Line Items]      
Investments in unconsolidated affiliates [1] 150 144 139
Interstate Transportation and Storage      
Segment Reporting Information [Line Items]      
Investments in unconsolidated affiliates [1] 2,350 2,179 2,201
Midstream      
Segment Reporting Information [Line Items]      
Investments in unconsolidated affiliates [1] 132 141 54
NGL and Refined Products Transportation and Services      
Segment Reporting Information [Line Items]      
Investments in unconsolidated affiliates [1] 383 390 398
Crude Oil Transportation and Services      
Segment Reporting Information [Line Items]      
Investments in unconsolidated affiliates [1] 193 187 48
All Other      
Segment Reporting Information [Line Items]      
Investments in unconsolidated affiliates [1] $ 58 $ 56 $ 53
[1] Amounts reflected above exclude Sunoco LP’s investments in the ET-S Permian and J.C. Nolan joint ventures, which are eliminated in consolidation.