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Reportable Segments (Selling General and Administrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Segment Reporting Information [Line Items]      
Selling, General and Administrative Expense $ 1,069 $ 891 $ 937
Intrastate Transportation and Storage      
Segment Reporting Information [Line Items]      
Selling, General and Administrative Expense 50 51 53
Interstate Transportation and Storage      
Segment Reporting Information [Line Items]      
Selling, General and Administrative Expense 129 115 131
Midstream      
Segment Reporting Information [Line Items]      
Selling, General and Administrative Expense 199 199 186
NGL and Refined Products Transportation and Services      
Segment Reporting Information [Line Items]      
Selling, General and Administrative Expense 160 157 127
Crude Oil Transportation and Services      
Segment Reporting Information [Line Items]      
Selling, General and Administrative Expense 149 120 224
Investment in Sunoco LP      
Segment Reporting Information [Line Items]      
Selling, General and Administrative Expense 266 113 111
Investment in USAC      
Segment Reporting Information [Line Items]      
Selling, General and Administrative Expense 54 51 45
Corporate Segment and Other Operating Segment [Member]      
Segment Reporting Information [Line Items]      
Selling, General and Administrative Expense $ 62 $ 85 $ 60