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Investments in Unconsolidated Affiliates (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]      
Investments in unconsolidated affiliates $ 2,338   $ 2,352
Equity in income of unconsolidated affiliates by business segment [Abstract]      
Equity in income of unconsolidated affiliates 104 $ 117  
NGL Pipelines & Services [Member]      
Schedule of Equity Method Investments [Line Items]      
Investments in unconsolidated affiliates 634   640
Equity in income of unconsolidated affiliates by business segment [Abstract]      
Equity in income of unconsolidated affiliates 39 34  
Crude Oil Pipelines & Services [Member]      
Schedule of Equity Method Investments [Line Items]      
Investments in unconsolidated affiliates 1,669   1,677
Equity in income of unconsolidated affiliates by business segment [Abstract]      
Equity in income of unconsolidated affiliates 64 81  
Natural Gas Pipelines & Services [Member]      
Schedule of Equity Method Investments [Line Items]      
Investments in unconsolidated affiliates 32   32
Equity in income of unconsolidated affiliates by business segment [Abstract]      
Equity in income of unconsolidated affiliates 1 2  
Petrochemical & Refined Products Services [Member]      
Schedule of Equity Method Investments [Line Items]      
Investments in unconsolidated affiliates 3   $ 3
Equity in income of unconsolidated affiliates by business segment [Abstract]      
Equity in income of unconsolidated affiliates $ 0 $ 0