Business Segments and Related Information, Segment Reporting Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Information by business segment [Abstract]
Segment gross operating margin	$ 2,153	$ 2,384	$ 4,495	$ 4,648
Revenues from third parties	10,638	16,041	23,069	29,033
Revenues from related parties	13	19	26	35
Intersegment and intrasegment revenues	0	0	0	0
Total revenues	10,651	16,060	23,095	29,068
Equity in income of unconsolidated affiliates	121	107	225	224
Property, plant and equipment, net	45,054		45,054		$ 44,401
Investments in unconsolidated affiliates	2,332		2,332		2,352
Intangible assets, net	3,871		3,871		3,965
Goodwill	5,608		5,608		5,608
Segment assets	56,865		56,865		56,326
NGL Pipelines & Services [Member]
Information by business segment [Abstract]
Total revenues	3,689	6,380	8,618	12,134
Equity in income of unconsolidated affiliates	30	36	69	70
Investments in unconsolidated affiliates	622		622		640
Intangible assets, net	848		848		865
Crude Oil Pipelines & Services [Member]
Information by business segment [Abstract]
Total revenues	4,304	5,385	8,485	9,457
Equity in income of unconsolidated affiliates	88	70	152	151
Investments in unconsolidated affiliates	1,675		1,675		1,677
Intangible assets, net	1,728		1,728		1,776
Natural Gas Pipelines & Services [Member]
Information by business segment [Abstract]
Total revenues	775	1,661	1,990	2,810
Equity in income of unconsolidated affiliates	2	0	3	2
Investments in unconsolidated affiliates	32		32		32
Intangible assets, net	1,181		1,181		1,206
Petrochemical & Refined Products Services [Member]
Information by business segment [Abstract]
Total revenues	1,883	2,634	4,002	4,667
Equity in income of unconsolidated affiliates	1	1	1	1
Investments in unconsolidated affiliates	3		3		3
Intangible assets, net	114		114		118
Reportable Business Segments [Member] | NGL Pipelines & Services [Member]
Information by business segment [Abstract]
Segment gross operating margin	1,110	1,327	2,322	2,552
Revenues from third parties	3,687	6,374	8,613	12,126
Revenues from related parties	2	6	5	8
Intersegment and intrasegment revenues	9,284	19,098	21,980	37,413
Total revenues	12,973	25,478	30,598	49,547
Equity in income of unconsolidated affiliates	30	36	69	70
Property, plant and equipment, net	17,042		17,042		17,283
Investments in unconsolidated affiliates	622		622		640
Intangible assets, net	848		848		865
Goodwill	2,811		2,811		2,811
Segment assets	21,323		21,323		21,599
Reportable Business Segments [Member] | Crude Oil Pipelines & Services [Member]
Information by business segment [Abstract]
Segment gross operating margin	422	407	819	822
Revenues from third parties	4,296	5,380	8,471	9,443
Revenues from related parties	8	5	14	14
Intersegment and intrasegment revenues	12,212	11,957	24,796	21,871
Total revenues	16,516	17,342	33,281	31,328
Equity in income of unconsolidated affiliates	88	70	152	151
Property, plant and equipment, net	6,710		6,710		6,760
Investments in unconsolidated affiliates	1,675		1,675		1,677
Intangible assets, net	1,728		1,728		1,776
Goodwill	1,841		1,841		1,841
Segment assets	11,954		11,954		12,054
Reportable Business Segments [Member] | Natural Gas Pipelines & Services [Member]
Information by business segment [Abstract]
Segment gross operating margin	238	229	552	449
Revenues from third parties	772	1,653	1,983	2,797
Revenues from related parties	3	8	7	13
Intersegment and intrasegment revenues	117	218	253	421
Total revenues	892	1,879	2,243	3,231
Equity in income of unconsolidated affiliates	2	0	3	2
Property, plant and equipment, net	9,723		9,723		9,721
Investments in unconsolidated affiliates	32		32		32
Intangible assets, net	1,181		1,181		1,206
Goodwill	0		0		0
Segment assets	10,936		10,936		10,959
Reportable Business Segments [Member] | Petrochemical & Refined Products Services [Member]
Information by business segment [Abstract]
Segment gross operating margin	383	421	802	825
Revenues from third parties	1,883	2,634	4,002	4,667
Revenues from related parties	0	0	0	0
Intersegment and intrasegment revenues	4,095	5,290	8,801	8,512
Total revenues	5,978	7,924	12,803	13,179
Equity in income of unconsolidated affiliates	1	1	1	1
Property, plant and equipment, net	7,721		7,721		7,770
Investments in unconsolidated affiliates	3		3		3
Intangible assets, net	114		114		118
Goodwill	956		956		956
Segment assets	8,794		8,794		8,847
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	(25,708)	(36,563)	(55,830)	(68,217)
Total revenues	(25,708)	(36,563)	(55,830)	(68,217)
Equity in income of unconsolidated affiliates	0	$ 0	0	$ 0
Adjustments [Member]
Information by business segment [Abstract]
Property, plant and equipment, net	3,858		3,858		2,867
Investments in unconsolidated affiliates	0		0		0
Intangible assets, net	0		0		0
Goodwill	0		0		0
Segment assets	$ 3,858		$ 3,858		$ 2,867