Intangible Assets and Goodwill - Schedule of Amortization Expense of our Intangible Assets by Business Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Intangible Assets [Line Items]
Amortization of intangible assets	$ 59	$ 52	$ 117	$ 104
NGL Pipelines & Services
Intangible Assets [Line Items]
Amortization of intangible assets	13	12	27	23
Crude Oil Pipelines & Services
Intangible Assets [Line Items]
Amortization of intangible assets	25	21	48	42
Natural Gas Pipelines & Services
Intangible Assets [Line Items]
Amortization of intangible assets	19	18	38	36
Petrochemical & Refined Products Services
Intangible Assets [Line Items]
Amortization of intangible assets	$ 2	$ 1	$ 4	$ 3