Business Segments and Related Information - Schedule of Revenues and Costs and Expenses Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Consolidated Revenues [Abstract]
Revenues	$ 11,363	$ 13,483	$ 26,780	$ 28,243
Operating Costs and Expenses [Abstract]
Cost of sales	7,899	10,184	19,904	21,589
Other operating costs and expenses	1,064	974	2,123	1,928
Depreciation, amortization and accretion	625	595	1,243	1,190
Asset impairment charges	11	4	21	24
Net losses (gains) attributable to asset sales and related matters	(7)	5	(9)	5
General and administrative costs	68	57	128	123
Total costs and expenses	9,660	11,819	23,410	24,859
NGL Pipelines & Services
Consolidated Revenues [Abstract]
Revenues	3,406	4,265	8,806	9,405
Crude Oil Pipelines & Services
Consolidated Revenues [Abstract]
Revenues	4,783	5,888	9,904	11,303
Natural Gas Pipelines & Services
Consolidated Revenues [Abstract]
Revenues	1,071	612	2,292	1,466
Petrochemical & Refined Products Services
Consolidated Revenues [Abstract]
Revenues	$ 2,103	$ 2,718	$ 5,778	$ 6,069