Investments in Unconsolidated Affiliates - Schedule of Equity in Income of Unconsolidated Affiliates by Business Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Schedule of Equity Method Investments [Line Items]
Equity in income of unconsolidated affiliates	$ 90	$ 99	$ 276	$ 302
NGL Pipelines & Services
Schedule of Equity Method Investments [Line Items]
Equity in income of unconsolidated affiliates	21	27	59	84
Crude Oil Pipelines & Services
Schedule of Equity Method Investments [Line Items]
Equity in income of unconsolidated affiliates	68	70	212	212
Natural Gas Pipelines & Services
Schedule of Equity Method Investments [Line Items]
Equity in income of unconsolidated affiliates	2	2	4	5
Petrochemical & Refined Products Services
Schedule of Equity Method Investments [Line Items]
Equity in income of unconsolidated affiliates	$ (1)	$ 0	$ 1	$ 1