Intangible Assets and Goodwill - Schedule of Amortization Expense of our Intangible Assets 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
Intangible Assets [Line Items]
Amortization of intangible assets	$ 55	$ 54	$ 159	$ 155
NGL Pipelines & Services
Intangible Assets [Line Items]
Amortization of intangible assets	13	12	36	33
Crude Oil Pipelines & Services
Intangible Assets [Line Items]
Amortization of intangible assets	21	27	63	78
Natural Gas Pipelines & Services
Intangible Assets [Line Items]
Amortization of intangible assets	19	13	55	39
Petrochemical & Refined Products Services
Intangible Assets [Line Items]
Amortization of intangible assets	$ 2	$ 2	$ 5	$ 5