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Investments in Unconsolidated Affiliates (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]      
Investments in unconsolidated affiliates $ 2,321   $ 2,330
Equity in income of unconsolidated affiliates by business segment [Abstract]      
Equity in income of unconsolidated affiliates 102 $ 104  
NGL Pipelines & Services [Member]      
Schedule of Equity Method Investments [Line Items]      
Investments in unconsolidated affiliates 610   612
Equity in income of unconsolidated affiliates by business segment [Abstract]      
Equity in income of unconsolidated affiliates 31 39  
Crude Oil Pipelines & Services [Member]      
Schedule of Equity Method Investments [Line Items]      
Investments in unconsolidated affiliates 1,674   1,681
Equity in income of unconsolidated affiliates by business segment [Abstract]      
Equity in income of unconsolidated affiliates 69 64  
Natural Gas Pipelines & Services [Member]      
Schedule of Equity Method Investments [Line Items]      
Investments in unconsolidated affiliates 34   33
Equity in income of unconsolidated affiliates by business segment [Abstract]      
Equity in income of unconsolidated affiliates 2 1  
Petrochemical & Refined Products Services [Member]      
Schedule of Equity Method Investments [Line Items]      
Investments in unconsolidated affiliates 3   $ 4
Equity in income of unconsolidated affiliates by business segment [Abstract]      
Equity in income of unconsolidated affiliates $ 0 $ 0