Business Segments and Related Information, Segment Reporting Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Information by business segment [Abstract]
Segment gross operating margin	$ 2,264	$ 2,303
Revenues from third parties	12,992	9,141
Revenues from related parties	16	14
Intersegment and intrasegment revenues	0	0
Total revenues	13,008	9,155
Equity in income of unconsolidated affiliates	117	149
Property, plant and equipment, net	44,033		$ 42,088
Investments in unconsolidated affiliates	2,426		2,428
Intangible assets, net	4,101		3,151
Goodwill	5,608		5,449
Segment assets	56,168		53,116
NGL Pipelines & Services [Member]
Information by business segment [Abstract]
Total revenues	5,754	3,584
Equity in income of unconsolidated affiliates	34	28
Investments in unconsolidated affiliates	654		656
Intangible assets, net	893		317
Goodwill	2,811		2,652
Crude Oil Pipelines & Services [Member]
Information by business segment [Abstract]
Total revenues	4,072	2,165
Equity in income of unconsolidated affiliates	81	119
Investments in unconsolidated affiliates	1,737		1,738
Intangible assets, net	1,840		1,860
Goodwill	1,841		1,841
Natural Gas Pipelines & Services [Member]
Information by business segment [Abstract]
Total revenues	1,149	1,587
Equity in income of unconsolidated affiliates	2	1
Investments in unconsolidated affiliates	32		31
Intangible assets, net	1,245		849
Goodwill	0		0
Petrochemical & Refined Products Services [Member]
Information by business segment [Abstract]
Total revenues	2,033	1,819
Equity in income of unconsolidated affiliates	0	1
Investments in unconsolidated affiliates	3		3
Intangible assets, net	123		125
Goodwill	956		956
Reportable Business Segments [Member] | NGL Pipelines & Services [Member]
Information by business segment [Abstract]
Segment gross operating margin	1,225	1,086
Revenues from third parties	5,752	3,581
Revenues from related parties	2	3
Intersegment and intrasegment revenues	18,315	13,089
Total revenues	24,069	16,673
Equity in income of unconsolidated affiliates	34	28
Property, plant and equipment, net	17,730		17,202
Investments in unconsolidated affiliates	654		656
Intangible assets, net	893		317
Goodwill	2,811		2,652
Segment assets	22,088		20,827
Reportable Business Segments [Member] | Crude Oil Pipelines & Services [Member]
Information by business segment [Abstract]
Segment gross operating margin	415	400
Revenues from third parties	4,063	2,157
Revenues from related parties	9	8
Intersegment and intrasegment revenues	9,914	7,420
Total revenues	13,986	9,585
Equity in income of unconsolidated affiliates	81	119
Property, plant and equipment, net	6,917		6,974
Investments in unconsolidated affiliates	1,737		1,738
Intangible assets, net	1,840		1,860
Goodwill	1,841		1,841
Segment assets	12,335		12,413
Reportable Business Segments [Member] | Natural Gas Pipelines & Services [Member]
Information by business segment [Abstract]
Segment gross operating margin	220	535
Revenues from third parties	1,144	1,584
Revenues from related parties	5	3
Intersegment and intrasegment revenues	203	146
Total revenues	1,352	1,733
Equity in income of unconsolidated affiliates	2	1
Property, plant and equipment, net	9,832		8,560
Investments in unconsolidated affiliates	32		31
Intangible assets, net	1,245		849
Goodwill	0		0
Segment assets	11,109		9,440
Reportable Business Segments [Member] | Petrochemical & Refined Products Services [Member]
Information by business segment [Abstract]
Segment gross operating margin	404	282
Revenues from third parties	2,033	1,819
Revenues from related parties	0	0
Intersegment and intrasegment revenues	3,222	6,234
Total revenues	5,255	8,053
Equity in income of unconsolidated affiliates	0	1
Property, plant and equipment, net	7,724		7,736
Investments in unconsolidated affiliates	3		3
Intangible assets, net	123		125
Goodwill	956		956
Segment assets	8,806		8,820
Eliminations [Member]
Information by business segment [Abstract]
Revenues from third parties	0	0
Revenues from related parties	0	0
Intersegment and intrasegment revenues	(31,654)	(26,889)
Total revenues	(31,654)	(26,889)
Equity in income of unconsolidated affiliates	0	$ 0
Adjustments [Member]
Information by business segment [Abstract]
Property, plant and equipment, net	1,830		1,616
Investments in unconsolidated affiliates	0		0
Intangible assets, net	0		0
Goodwill	0		0
Segment assets	$ 1,830		$ 1,616