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Investments in Unconsolidated Affiliates (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]          
Investments in unconsolidated affiliates $ 2,268   $ 2,268   $ 2,330
Equity in income of unconsolidated affiliates by business segment [Abstract]          
Equity in income of unconsolidated affiliates 99 $ 122 302 $ 347  
NGL Pipelines & Services [Member]          
Schedule of Equity Method Investments [Line Items]          
Investments in unconsolidated affiliates 597   597   612
Equity in income of unconsolidated affiliates by business segment [Abstract]          
Equity in income of unconsolidated affiliates 27 32 84 101  
Crude Oil Pipelines & Services [Member]          
Schedule of Equity Method Investments [Line Items]          
Investments in unconsolidated affiliates 1,634   1,634   1,681
Equity in income of unconsolidated affiliates by business segment [Abstract]          
Equity in income of unconsolidated affiliates 70 89 212 241  
Natural Gas Pipelines & Services [Member]          
Schedule of Equity Method Investments [Line Items]          
Investments in unconsolidated affiliates 34   34   33
Equity in income of unconsolidated affiliates by business segment [Abstract]          
Equity in income of unconsolidated affiliates 2 1 5 4  
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 $ 0 $ 0 $ 1 $ 1