Business Segments and Related Information, Segment Reporting Information (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment revenues [Abstract]
Total revenues		$ 56,219	$ 49,715	$ 58,186
Segment expenses [Abstract]
Cost of sales	[1]	42,580	37,023	45,836
Total operating costs and expenses		49,045	43,017	51,502
Other segment income (expense) [Abstract]
Equity in income of unconsolidated affiliates		408	462	464
Other financial information [Abstract]
Current assets		15,133	12,248
Other assets		997	1,222
Total assets		77,168	70,982
NGL Pipelines and Services [Member]
Segment revenues [Abstract]
Total revenues		20,276	17,645	24,259
Other segment income (expense) [Abstract]
Equity in income of unconsolidated affiliates		$ 117	$ 133	$ 149
Segment Reporting, Other Segment Item, Composition, Description		NGL Pipelines & Services – Non-refundable payments received from shippers attributable to make-up rights, subsequent recognition of revenues attributable to make-up rights, and other segment expenses.	NGL Pipelines & Services – Non-refundable payments received from shippers attributable to make-up rights, subsequent recognition of revenues attributable to make-up rights, and other segment expenses.	NGL Pipelines & Services – Non-refundable payments received from shippers attributable to make-up rights, subsequent recognition of revenues attributable to make-up rights, and other segment expenses.
Crude Oil Pipelines & Services [Member]
Segment revenues [Abstract]
Total revenues		$ 21,580	$ 19,336	$ 18,561
Other segment income (expense) [Abstract]
Equity in income of unconsolidated affiliates		$ 285	$ 320	$ 308
Segment Reporting, Other Segment Item, Composition, Description		Crude Oil Pipelines & Services – Other segment expenses.	Crude Oil Pipelines & Services – Subsequent recognition of revenues attributable to make-up rights.	Crude Oil Pipelines & Services – Non-refundable payments received from shippers attributable to make-up rights, subsequent recognition of revenues attributable to make-up rights, and other segment expenses.
Natural Gas Pipelines & Services [Member]
Segment revenues [Abstract]
Total revenues		$ 3,004	$ 3,776	$ 6,260
Other segment income (expense) [Abstract]
Equity in income of unconsolidated affiliates		$ 5	$ 6	$ 5
Segment Reporting, Other Segment Item, Composition, Description		Natural Gas Pipelines & Services – Other segment expenses.	Natural Gas Pipelines & Services – Other segment expenses.	Natural Gas Pipelines & Services – Other segment expenses.
Petrochemical & Refined Products Services [Member]
Segment revenues [Abstract]
Total revenues		$ 11,359	$ 8,958	$ 9,106
Other segment income (expense) [Abstract]
Equity in income of unconsolidated affiliates		$ 1	$ 3	$ 2
Segment Reporting, Other Segment Item, Composition, Description		Petrochemical & Refined Products Services – Other segment expenses.	Petrochemical & Refined Products Services – Other segment expenses.	Petrochemical & Refined Products Services – Other segment expenses.
Nonrelated Party [Member]
Segment revenues [Abstract]
Total revenues		$ 56,161	$ 49,654	$ 58,127
Related Party [Member]
Segment revenues [Abstract]
Total revenues		58	61	59
Reportable Business Segments [Member]
Segment revenues [Abstract]
Total revenues		185,475	171,736	189,763
Segment expenses [Abstract]
Cost of sales		170,769	157,973	176,370
Variable operating costs and expenses	[2]	1,323	1,388	1,469
Fixed operating costs and expenses	[3]	3,820	3,464	3,134
Total operating costs and expenses		175,912	162,825	180,973
Other segment income (expense) [Abstract]
Equity in income of unconsolidated affiliates		408	462	464
Other segment items		47	3	102
Total other segment income (expense), net		455	465	566
Total segment gross operating margin		10,018	9,376	9,356
Other financial information [Abstract]
Capital expenditures		4,544	3,266	1,964
Total assets		56,900	55,267
Reportable Business Segments [Member] | NGL Pipelines and Services [Member]
Segment revenues [Abstract]
Total revenues		69,098	63,135	90,019
Segment expenses [Abstract]
Cost of sales		61,260	56,143	82,957
Variable operating costs and expenses	[2]	745	741	769
Fixed operating costs and expenses	[3]	1,682	1,589	1,412
Total operating costs and expenses		63,687	58,473	85,138
Other segment income (expense) [Abstract]
Equity in income of unconsolidated affiliates		117	133	149
Other segment items		20	103	112
Total other segment income (expense), net		137	236	261
Total segment gross operating margin		5,548	4,898	5,142
Other financial information [Abstract]
Capital expenditures		2,498	1,366	624
Total assets		21,900	21,792
Reportable Business Segments [Member] | Crude Oil Pipelines & Services [Member]
Segment revenues [Abstract]
Total revenues		75,995	76,458	65,186
Segment expenses [Abstract]
Cost of sales		74,098	74,437	63,325
Variable operating costs and expenses	[2]	132	191	173
Fixed operating costs and expenses	[3]	414	403	386
Total operating costs and expenses		74,644	75,031	63,884
Other segment income (expense) [Abstract]
Equity in income of unconsolidated affiliates		285	320	308
Other segment items		10	(40)	45
Total other segment income (expense), net		295	280	353
Total segment gross operating margin		1,646	1,707	1,655
Other financial information [Abstract]
Capital expenditures		161	119	84
Total assets		11,390	11,822
Reportable Business Segments [Member] | Natural Gas Pipelines & Services [Member]
Segment revenues [Abstract]
Total revenues		3,671	4,303	7,148
Segment expenses [Abstract]
Cost of sales		1,656	2,583	5,532
Variable operating costs and expenses	[2]	73	59	54
Fixed operating costs and expenses	[3]	676	595	532
Total operating costs and expenses		2,405	3,237	6,118
Other segment income (expense) [Abstract]
Equity in income of unconsolidated affiliates		5	6	5
Other segment items		6	5	7
Total other segment income (expense), net		11	11	12
Total segment gross operating margin		1,277	1,077	1,042
Other financial information [Abstract]
Capital expenditures		932	793	344
Total assets		12,260	11,210
Reportable Business Segments [Member] | Petrochemical & Refined Products Services [Member]
Segment revenues [Abstract]
Total revenues		36,711	27,840	27,410
Segment expenses [Abstract]
Cost of sales		33,755	24,810	24,556
Variable operating costs and expenses	[2]	373	397	473
Fixed operating costs and expenses	[3]	1,048	877	804
Total operating costs and expenses		35,176	26,084	25,833
Other segment income (expense) [Abstract]
Equity in income of unconsolidated affiliates		1	3	2
Other segment items		11	(65)	(62)
Total other segment income (expense), net		12	(62)	(60)
Total segment gross operating margin		1,547	1,694	1,517
Other financial information [Abstract]
Capital expenditures		953	988	912
Total assets		11,350	10,443
Reportable Business Segments [Member] | Nonrelated Party [Member]
Segment revenues [Abstract]
Total revenues		56,161	49,654	58,127
Reportable Business Segments [Member] | Nonrelated Party [Member] | NGL Pipelines and Services [Member]
Segment revenues [Abstract]
Total revenues		20,264	17,635	24,244
Reportable Business Segments [Member] | Nonrelated Party [Member] | Crude Oil Pipelines & Services [Member]
Segment revenues [Abstract]
Total revenues		21,546	19,300	18,548
Reportable Business Segments [Member] | Nonrelated Party [Member] | Natural Gas Pipelines & Services [Member]
Segment revenues [Abstract]
Total revenues		2,992	3,761	6,229
Reportable Business Segments [Member] | Nonrelated Party [Member] | Petrochemical & Refined Products Services [Member]
Segment revenues [Abstract]
Total revenues		11,359	8,958	9,106
Reportable Business Segments [Member] | Related Party [Member]
Segment revenues [Abstract]
Total revenues		58	61	59
Reportable Business Segments [Member] | Related Party [Member] | NGL Pipelines and Services [Member]
Segment revenues [Abstract]
Total revenues		12	10	15
Reportable Business Segments [Member] | Related Party [Member] | Crude Oil Pipelines & Services [Member]
Segment revenues [Abstract]
Total revenues		34	36	13
Reportable Business Segments [Member] | Related Party [Member] | Natural Gas Pipelines & Services [Member]
Segment revenues [Abstract]
Total revenues		12	15	31
Reportable Business Segments [Member] | Related Party [Member] | Petrochemical & Refined Products Services [Member]
Segment revenues [Abstract]
Total revenues		0	0	0
Eliminations [Member]
Segment revenues [Abstract]
Total revenues		(129,256)	(122,021)	(131,577)
Eliminations [Member] | NGL Pipelines and Services [Member]
Segment revenues [Abstract]
Total revenues		(48,822)	(45,490)	(65,760)
Eliminations [Member] | Crude Oil Pipelines & Services [Member]
Segment revenues [Abstract]
Total revenues		(54,415)	(57,122)	(46,625)
Eliminations [Member] | Natural Gas Pipelines & Services [Member]
Segment revenues [Abstract]
Total revenues		(667)	(527)	(888)
Eliminations [Member] | Petrochemical & Refined Products Services [Member]
Segment revenues [Abstract]
Total revenues		(25,352)	(18,882)	$ (18,304)
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Other financial information [Abstract]
Construction in progress		4,138	2,245
Current assets		15,133	12,248
Other assets		$ 997	$ 1,222

[1] Cost of sales is a component of “Operating costs and expenses,” as presented on our Statements of Consolidated Operations.  Fluctuations in these amounts are primarily due to changes in energy commodity prices and sales volumes associated with our marketing activities.

[2] Variable operating costs and expenses represent the cost of operating our plants, pipelines and other fixed assets that generally fluctuate based on utilization. 

[3] Fixed operating costs and expenses represent the cost of operating our plants, pipelines and other fixed assets that generally remain constant independent of utilization.