Business Segments and Related Information, Segment Reporting Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Information by business segment [Abstract]
Segment gross operating margin	$ 2,427	$ 2,153	$ 4,934	$ 4,495
Revenues from third parties	13,472	10,638	28,217	23,069
Revenues from related parties	11	13	26	26
Intersegment and intrasegment revenues	0	0	0	0
Total revenues	13,483	10,651	28,243	23,095
Equity in income of unconsolidated affiliates	101	121	203	225
Property, plant and equipment, net	47,436		47,436		$ 45,804
Investments in unconsolidated affiliates	2,292		2,292		2,330
Intangible assets, net	3,671		3,671		3,770
Goodwill	5,608		5,608		5,608
Segment assets	59,007		59,007		57,512
NGL Pipelines & Services [Member]
Information by business segment [Abstract]
Total revenues	4,265	3,689	9,405	8,618
Equity in income of unconsolidated affiliates	26	30	57	69
Investments in unconsolidated affiliates	600		600		612
Intangible assets, net	808		808		828
Crude Oil Pipelines & Services [Member]
Information by business segment [Abstract]
Total revenues	5,888	4,304	11,303	8,485
Equity in income of unconsolidated affiliates	73	88	142	152
Investments in unconsolidated affiliates	1,656		1,656		1,681
Intangible assets, net	1,622		1,622		1,673
Natural Gas Pipelines & Services [Member]
Information by business segment [Abstract]
Total revenues	612	775	1,466	1,990
Equity in income of unconsolidated affiliates	1	2	3	3
Investments in unconsolidated affiliates	33		33		33
Intangible assets, net	1,133		1,133		1,158
Petrochemical & Refined Products Services [Member]
Information by business segment [Abstract]
Total revenues	2,718	1,883	6,069	4,002
Equity in income of unconsolidated affiliates	1	1	1	1
Investments in unconsolidated affiliates	3		3		4
Intangible assets, net	108		108		111
Reportable Business Segments [Member] | NGL Pipelines & Services [Member]
Information by business segment [Abstract]
Segment gross operating margin	1,325	1,110	2,665	2,322
Revenues from third parties	4,262	3,687	9,399	8,613
Revenues from related parties	3	2	6	5
Intersegment and intrasegment revenues	11,558	9,284	23,113	21,980
Total revenues	15,823	12,973	32,518	30,598
Equity in income of unconsolidated affiliates	26	30	57	69
Property, plant and equipment, net	17,930		17,930		17,541
Investments in unconsolidated affiliates	600		600		612
Intangible assets, net	808		808		828
Goodwill	2,811		2,811		2,811
Segment assets	22,149		22,149		21,792
Reportable Business Segments [Member] | Crude Oil Pipelines & Services [Member]
Information by business segment [Abstract]
Segment gross operating margin	417	422	828	819
Revenues from third parties	5,883	4,296	11,289	8,471
Revenues from related parties	5	8	14	14
Intersegment and intrasegment revenues	15,042	12,212	28,869	24,796
Total revenues	20,930	16,516	40,172	33,281
Equity in income of unconsolidated affiliates	73	88	142	152
Property, plant and equipment, net	6,375		6,375		6,627
Investments in unconsolidated affiliates	1,656		1,656		1,681
Intangible assets, net	1,622		1,622		1,673
Goodwill	1,841		1,841		1,841
Segment assets	11,494		11,494		11,822
Reportable Business Segments [Member] | Natural Gas Pipelines & Services [Member]
Information by business segment [Abstract]
Segment gross operating margin	293	238	605	552
Revenues from third parties	609	772	1,460	1,983
Revenues from related parties	3	3	6	7
Intersegment and intrasegment revenues	138	117	315	253
Total revenues	750	892	1,781	2,243
Equity in income of unconsolidated affiliates	1	2	3	3
Property, plant and equipment, net	10,141		10,141		10,019
Investments in unconsolidated affiliates	33		33		33
Intangible assets, net	1,133		1,133		1,158
Goodwill	0		0		0
Segment assets	11,307		11,307		11,210
Reportable Business Segments [Member] | Petrochemical & Refined Products Services [Member]
Information by business segment [Abstract]
Segment gross operating margin	392	383	836	802
Revenues from third parties	2,718	1,883	6,069	4,002
Revenues from related parties	0	0	0	0
Intersegment and intrasegment revenues	5,714	4,095	12,038	8,801
Total revenues	8,432	5,978	18,107	12,803
Equity in income of unconsolidated affiliates	1	1	1	1
Property, plant and equipment, net	9,972		9,972		9,372
Investments in unconsolidated affiliates	3		3		4
Intangible assets, net	108		108		111
Goodwill	956		956		956
Segment assets	11,039		11,039		10,443
Eliminations [Member]
Information by business segment [Abstract]
Revenues from third parties	0	0	0	0
Revenues from related parties	0	0	0	0
Intersegment and intrasegment revenues	(32,452)	(25,708)	(64,335)	(55,830)
Total revenues	(32,452)	(25,708)	(64,335)	(55,830)
Equity in income of unconsolidated affiliates	0	$ 0	0	$ 0
Adjustments [Member]
Information by business segment [Abstract]
Property, plant and equipment, net	3,018		3,018		2,245
Investments in unconsolidated affiliates	0		0		0
Intangible assets, net	0		0		0
Goodwill	0		0		0
Segment assets	$ 3,018		$ 3,018		$ 2,245