Business Segments and Related Information, Segment Reporting Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Information by business segment [Abstract]
Segment gross operating margin	$ 2,342	$ 2,264
Revenues from third parties	12,431	12,992
Revenue From Related Party	13	16
Intersegment and intrasegment revenues	0	0
Total revenues	12,444	13,008
Equity in income of unconsolidated affiliates	104	117
Property, plant and equipment, net	44,597		$ 44,401
Investments in unconsolidated affiliates	2,338		2,352
Intangible assets, net	3,919		3,965
Goodwill	5,608		5,608
Segment assets	56,462		56,326
NGL Pipelines & Services [Member]
Information by business segment [Abstract]
Total revenues	4,929	5,754
Equity in income of unconsolidated affiliates	39	34
Investments in unconsolidated affiliates	634		640
Intangible assets, net	856		865
Crude Oil Pipelines & Services [Member]
Information by business segment [Abstract]
Total revenues	4,181	4,072
Equity in income of unconsolidated affiliates	64	81
Investments in unconsolidated affiliates	1,669		1,677
Intangible assets, net	1,753		1,776
Natural Gas Pipelines & Services [Member]
Information by business segment [Abstract]
Total revenues	1,215	1,149
Equity in income of unconsolidated affiliates	1	2
Investments in unconsolidated affiliates	32		32
Intangible assets, net	1,194		1,206
Petrochemical & Refined Products Services [Member]
Information by business segment [Abstract]
Total revenues	2,119	2,033
Equity in income of unconsolidated affiliates	0	0
Investments in unconsolidated affiliates	3		3
Intangible assets, net	116		118
Reportable Business Segments [Member] | NGL Pipelines & Services [Member]
Information by business segment [Abstract]
Segment gross operating margin	1,212	1,225
Revenues from third parties	4,926	5,752
Revenue From Related Party	3	2
Intersegment and intrasegment revenues	12,696	18,315
Total revenues	17,625	24,069
Equity in income of unconsolidated affiliates	39	34
Property, plant and equipment, net	17,170		17,283
Investments in unconsolidated affiliates	634		640
Intangible assets, net	856		865
Goodwill	2,811		2,811
Segment assets	21,471		21,599
Reportable Business Segments [Member] | Crude Oil Pipelines & Services [Member]
Information by business segment [Abstract]
Segment gross operating margin	397	415
Revenues from third parties	4,175	4,063
Revenue From Related Party	6	9
Intersegment and intrasegment revenues	12,584	9,914
Total revenues	16,765	13,986
Equity in income of unconsolidated affiliates	64	81
Property, plant and equipment, net	6,722		6,760
Investments in unconsolidated affiliates	1,669		1,677
Intangible assets, net	1,753		1,776
Goodwill	1,841		1,841
Segment assets	11,985		12,054
Reportable Business Segments [Member] | Natural Gas Pipelines & Services [Member]
Information by business segment [Abstract]
Segment gross operating margin	314	220
Revenues from third parties	1,211	1,144
Revenue From Related Party	4	5
Intersegment and intrasegment revenues	136	203
Total revenues	1,351	1,352
Equity in income of unconsolidated affiliates	1	2
Property, plant and equipment, net	9,662		9,721
Investments in unconsolidated affiliates	32		32
Intangible assets, net	1,194		1,206
Goodwill	0		0
Segment assets	10,888		10,959
Reportable Business Segments [Member] | Petrochemical & Refined Products Services [Member]
Information by business segment [Abstract]
Segment gross operating margin	419	404
Revenues from third parties	2,119	2,033
Revenue From Related Party	0	0
Intersegment and intrasegment revenues	4,706	3,222
Total revenues	6,825	5,255
Equity in income of unconsolidated affiliates	0	0
Property, plant and equipment, net	7,731		7,770
Investments in unconsolidated affiliates	3		3
Intangible assets, net	116		118
Goodwill	956		956
Segment assets	8,806		8,847
Eliminations [Member]
Information by business segment [Abstract]
Revenues from third parties	0	0
Revenue From Related Party	0	0
Intersegment and intrasegment revenues	(30,122)	(31,654)
Total revenues	(30,122)	(31,654)
Equity in income of unconsolidated affiliates	0	$ 0
Adjustments [Member]
Information by business segment [Abstract]
Property, plant and equipment, net	3,312		2,867
Investments in unconsolidated affiliates	0		0
Intangible assets, net	0		0
Goodwill	0		0
Segment assets	$ 3,312		$ 2,867