Investments in Unconsolidated Affiliates - Schedule of Equity in Income of Unconsolidated Affiliates by Business Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Schedule of Equity Method Investments [Line Items]
Equity in income of unconsolidated affiliates	$ 92	$ 101	$ 186	$ 203
NGL Pipelines & Services
Schedule of Equity Method Investments [Line Items]
Equity in income of unconsolidated affiliates	18	26	38	57
Crude Oil Pipelines & Services
Schedule of Equity Method Investments [Line Items]
Equity in income of unconsolidated affiliates	72	73	144	142
Natural Gas Pipelines & Services
Schedule of Equity Method Investments [Line Items]
Equity in income of unconsolidated affiliates	0	1	2	3
Petrochemical & Refined Products Services
Schedule of Equity Method Investments [Line Items]
Equity in income of unconsolidated affiliates	$ 2	$ 1	$ 2	$ 1