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Investments in Unconsolidated Affiliates (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]          
Investments in unconsolidated affiliates $ 2,337   $ 2,337   $ 2,352
Equity in income of unconsolidated affiliates by business segment [Abstract]          
Equity in income of unconsolidated affiliates 122 $ 111 347 $ 335  
NGL Pipelines & Services [Member]          
Schedule of Equity Method Investments [Line Items]          
Investments in unconsolidated affiliates 618   618   640
Equity in income of unconsolidated affiliates by business segment [Abstract]          
Equity in income of unconsolidated affiliates 32 39 101 109  
Crude Oil Pipelines & Services [Member]          
Schedule of Equity Method Investments [Line Items]          
Investments in unconsolidated affiliates 1,684   1,684   1,677
Equity in income of unconsolidated affiliates by business segment [Abstract]          
Equity in income of unconsolidated affiliates 89 70 241 221  
Natural Gas Pipelines & Services [Member]          
Schedule of Equity Method Investments [Line Items]          
Investments in unconsolidated affiliates 32   32   32
Equity in income of unconsolidated affiliates by business segment [Abstract]          
Equity in income of unconsolidated affiliates 1 2 4 4  
Petrochemical & Refined Products Services [Member]          
Schedule of Equity Method Investments [Line Items]          
Investments in unconsolidated affiliates 3   3   $ 3
Equity in income of unconsolidated affiliates by business segment [Abstract]          
Equity in income of unconsolidated affiliates $ 0 $ 0 $ 1 $ 1