Revenues - Schedule of Revenues by Business Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Disaggregation of Revenue [Line Items]
Revenues	$ 11,363	$ 13,483	$ 26,780	$ 28,243
NGL Pipelines & Services
Disaggregation of Revenue [Line Items]
Revenues	3,406	4,265	8,806	9,405
NGL Pipelines & Services | Sales of NGLs and related products
Disaggregation of Revenue [Line Items]
Revenues	2,723	3,581	7,374	7,981
NGL Pipelines & Services | Natural gas processing and fractionation
Disaggregation of Revenue [Line Items]
Revenues	296	336	648	694
NGL Pipelines & Services | Transportation
Disaggregation of Revenue [Line Items]
Revenues	308	263	620	542
NGL Pipelines & Services | Storage and terminals
Disaggregation of Revenue [Line Items]
Revenues	79	85	164	188
NGL Pipelines & Services | Total segment midstream services
Disaggregation of Revenue [Line Items]
Revenues	683	684	1,432	1,424
Crude Oil Pipelines & Services
Disaggregation of Revenue [Line Items]
Revenues	4,783	5,888	9,904	11,303
Crude Oil Pipelines & Services | Transportation
Disaggregation of Revenue [Line Items]
Revenues	195	190	384	383
Crude Oil Pipelines & Services | Storage and terminals
Disaggregation of Revenue [Line Items]
Revenues	109	100	216	200
Crude Oil Pipelines & Services | Total segment midstream services
Disaggregation of Revenue [Line Items]
Revenues	304	290	600	583
Crude Oil Pipelines & Services | Sales of crude oil
Disaggregation of Revenue [Line Items]
Revenues	4,479	5,598	9,304	10,720
Natural Gas Pipelines & Services
Disaggregation of Revenue [Line Items]
Revenues	1,071	612	2,292	1,466
Natural Gas Pipelines & Services | Transportation
Disaggregation of Revenue [Line Items]
Revenues	439	371	875	722
Natural Gas Pipelines & Services | Total segment midstream services
Disaggregation of Revenue [Line Items]
Revenues	439	371	875	722
Natural Gas Pipelines & Services | Sales of natural gas
Disaggregation of Revenue [Line Items]
Revenues	632	241	1,417	744
Petrochemical & Refined Products Services
Disaggregation of Revenue [Line Items]
Revenues	2,103	2,718	5,778	6,069
Petrochemical & Refined Products Services | Storage and terminals
Disaggregation of Revenue [Line Items]
Revenues	87	81	158	163
Petrochemical & Refined Products Services | Total segment midstream services
Disaggregation of Revenue [Line Items]
Revenues	328	329	677	715
Petrochemical & Refined Products Services | Sales of petrochemicals and refined products
Disaggregation of Revenue [Line Items]
Revenues	1,775	2,389	5,101	5,354
Petrochemical & Refined Products Services | Fractionation and isomerization
Disaggregation of Revenue [Line Items]
Revenues	84	85	187	211
Petrochemical & Refined Products Services | Transportation, including marine logistics
Disaggregation of Revenue [Line Items]
Revenues	$ 157	$ 163	$ 332	$ 341