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Investments in Unconsolidated Affiliates (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]          
Investments in unconsolidated affiliates $ 2,292   $ 2,292   $ 2,330
Equity in income of unconsolidated affiliates by business segment [Abstract]          
Equity in income of unconsolidated affiliates 101 $ 121 203 $ 225  
NGL Pipelines & Services [Member]          
Schedule of Equity Method Investments [Line Items]          
Investments in unconsolidated affiliates 600   600   612
Equity in income of unconsolidated affiliates by business segment [Abstract]          
Equity in income of unconsolidated affiliates 26 30 57 69  
Crude Oil Pipelines & Services [Member]          
Schedule of Equity Method Investments [Line Items]          
Investments in unconsolidated affiliates 1,656   1,656   1,681
Equity in income of unconsolidated affiliates by business segment [Abstract]          
Equity in income of unconsolidated affiliates 73 88 142 152  
Natural Gas Pipelines & Services [Member]          
Schedule of Equity Method Investments [Line Items]          
Investments in unconsolidated affiliates 33   33   33
Equity in income of unconsolidated affiliates by business segment [Abstract]          
Equity in income of unconsolidated affiliates 1 2 3 3  
Petrochemical & Refined Products Services [Member]          
Schedule of Equity Method Investments [Line Items]          
Investments in unconsolidated affiliates 3   3   $ 4
Equity in income of unconsolidated affiliates by business segment [Abstract]          
Equity in income of unconsolidated affiliates $ 1 $ 1 $ 1 $ 1