Revenues, Revenues by Business Segment and Revenue Type (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue [Abstract]
Revenues	$ 10,651	$ 16,060	$ 23,095	$ 29,068
NGL Pipelines & Services [Member]
Revenue [Abstract]
Revenues	3,689	6,380	8,618	12,134
NGL Pipelines & Services [Member] | Sales of NGLs and Related Products [Member]
Revenue [Abstract]
Revenues	3,040	5,580	7,304	10,620
NGL Pipelines & Services [Member] | Midstream Services [Member]
Revenue [Abstract]
Revenues	649	800	1,314	1,514
NGL Pipelines & Services [Member] | Midstream Services: Natural Gas Processing and Fractionation [Member]
Revenue [Abstract]
Revenues	300	463	600	803
NGL Pipelines & Services [Member] | Midstream Services: Transportation [Member]
Revenue [Abstract]
Revenues	246	229	512	458
NGL Pipelines & Services [Member] | Midstream Services: Storage and Terminals [Member]
Revenue [Abstract]
Revenues	103	108	202	253
Crude Oil Pipelines & Services [Member]
Revenue [Abstract]
Revenues	4,304	5,385	8,485	9,457
Crude Oil Pipelines & Services [Member] | Sales of Crude Oil [Member]
Revenue [Abstract]
Revenues	4,005	5,031	7,931	8,747
Crude Oil Pipelines & Services [Member] | Midstream Services [Member]
Revenue [Abstract]
Revenues	299	354	554	710
Crude Oil Pipelines & Services [Member] | Midstream Services: Transportation [Member]
Revenue [Abstract]
Revenues	200	249	355	488
Crude Oil Pipelines & Services [Member] | Midstream Services: Storage and Terminals [Member]
Revenue [Abstract]
Revenues	99	105	199	222
Natural Gas Pipelines & Services [Member]
Revenue [Abstract]
Revenues	775	1,661	1,990	2,810
Natural Gas Pipelines & Services [Member] | Sales of Natural Gas [Member]
Revenue [Abstract]
Revenues	445	1,359	1,291	2,239
Natural Gas Pipelines & Services [Member] | Midstream Services [Member]
Revenue [Abstract]
Revenues	330	302	699	571
Natural Gas Pipelines & Services [Member] | Midstream Services: Transportation [Member]
Revenue [Abstract]
Revenues	330	302	699	571
Petrochemical & Refined Products Services [Member]
Revenue [Abstract]
Revenues	1,883	2,634	4,002	4,667
Petrochemical & Refined Products Services [Member] | Sales of Petrochemicals and Refined Products [Member]
Revenue [Abstract]
Revenues	1,591	2,370	3,405	4,124
Petrochemical & Refined Products Services [Member] | Midstream Services [Member]
Revenue [Abstract]
Revenues	292	264	597	543
Petrochemical & Refined Products Services [Member] | Midstream Services: Fractionation and Isomerization [Member]
Revenue [Abstract]
Revenues	51	47	114	116
Petrochemical & Refined Products Services [Member] | Midstream Services: Transportation [Member]
Revenue [Abstract]
Revenues	155	139	315	277
Petrochemical & Refined Products Services [Member] | Midstream Services: Storage and Terminals [Member]
Revenue [Abstract]
Revenues	$ 86	$ 78	$ 168	$ 150