Revenues - Schedule of Revenues 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
Disaggregation of Revenue [Line Items]
Revenues	$ 12,023	$ 13,775	$ 38,803	$ 42,018
NGL Pipelines & Services
Disaggregation of Revenue [Line Items]
Revenues	3,465	4,831	12,271	14,236
NGL Pipelines & Services | Sales of NGLs and related products
Disaggregation of Revenue [Line Items]
Revenues	2,736	4,134	10,110	12,115
NGL Pipelines & Services | Natural gas processing and fractionation
Disaggregation of Revenue [Line Items]
Revenues	341	315	989	1,009
NGL Pipelines & Services | Transportation
Disaggregation of Revenue [Line Items]
Revenues	314	293	934	835
NGL Pipelines & Services | Storage and terminals
Disaggregation of Revenue [Line Items]
Revenues	74	89	238	277
NGL Pipelines & Services | Total segment midstream services
Disaggregation of Revenue [Line Items]
Revenues	729	697	2,161	2,121
Crude Oil Pipelines & Services
Disaggregation of Revenue [Line Items]
Revenues	5,396	5,251	15,300	16,554
Crude Oil Pipelines & Services | Transportation
Disaggregation of Revenue [Line Items]
Revenues	202	194	586	577
Crude Oil Pipelines & Services | Storage and terminals
Disaggregation of Revenue [Line Items]
Revenues	107	105	323	305
Crude Oil Pipelines & Services | Total segment midstream services
Disaggregation of Revenue [Line Items]
Revenues	309	299	909	882
Crude Oil Pipelines & Services | Sales of crude oil
Disaggregation of Revenue [Line Items]
Revenues	5,087	4,952	14,391	15,672
Natural Gas Pipelines & Services
Disaggregation of Revenue [Line Items]
Revenues	932	649	3,224	2,115
Natural Gas Pipelines & Services | Transportation
Disaggregation of Revenue [Line Items]
Revenues	456	406	1,331	1,128
Natural Gas Pipelines & Services | Total segment midstream services
Disaggregation of Revenue [Line Items]
Revenues	456	406	1,331	1,128
Natural Gas Pipelines & Services | Sales of natural gas
Disaggregation of Revenue [Line Items]
Revenues	476	243	1,893	987
Petrochemical & Refined Products Services
Disaggregation of Revenue [Line Items]
Revenues	2,230	3,044	8,008	9,113
Petrochemical & Refined Products Services | Storage and terminals
Disaggregation of Revenue [Line Items]
Revenues	85	71	243	234
Petrochemical & Refined Products Services | Total segment midstream services
Disaggregation of Revenue [Line Items]
Revenues	311	293	988	1,008
Petrochemical & Refined Products Services | Sales of petrochemicals and refined products
Disaggregation of Revenue [Line Items]
Revenues	1,919	2,751	7,020	8,105
Petrochemical & Refined Products Services | Fractionation and isomerization
Disaggregation of Revenue [Line Items]
Revenues	70	65	257	276
Petrochemical & Refined Products Services | Transportation, including marine logistics
Disaggregation of Revenue [Line Items]
Revenues	$ 156	$ 157	$ 488	$ 498