Business Segments and Related Information, Segment Reporting Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Information by business segment [Abstract]
Segment gross operating margin	$ 2,384	$ 2,045	$ 4,648	$ 4,348
Revenues from third parties	16,041	9,441	29,033	18,582
Revenues from related parties	19	9	35	23
Intersegment and intrasegment revenues	0	0	0	0
Total revenues	16,060	9,450	29,068	18,605
Equity in income of unconsolidated affiliates	107	161	224	310
Property, plant and equipment, net	44,129		44,129		$ 42,088
Investments in unconsolidated affiliates	2,374		2,374		2,428
Intangible assets, net	4,056		4,056		3,151
Goodwill	5,608		5,608		5,449
Segment assets	56,167		56,167		53,116
NGL Pipelines & Services [Member]
Information by business segment [Abstract]
Total revenues	6,380	3,587	12,134	7,171
Equity in income of unconsolidated affiliates	36	29	70	57
Investments in unconsolidated affiliates	650		650		656
Intangible assets, net	884		884		317
Goodwill	2,811		2,811		2,652
Crude Oil Pipelines & Services [Member]
Information by business segment [Abstract]
Total revenues	5,385	2,504	9,457	4,669
Equity in income of unconsolidated affiliates	70	130	151	249
Investments in unconsolidated affiliates	1,690		1,690		1,738
Intangible assets, net	1,819		1,819		1,860
Goodwill	1,841		1,841		1,841
Natural Gas Pipelines & Services [Member]
Information by business segment [Abstract]
Total revenues	1,661	709	2,810	2,296
Equity in income of unconsolidated affiliates	0	2	2	3
Investments in unconsolidated affiliates	31		31		31
Intangible assets, net	1,231		1,231		849
Goodwill	0		0		0
Petrochemical & Refined Products Services [Member]
Information by business segment [Abstract]
Total revenues	2,634	2,650	4,667	4,469
Equity in income of unconsolidated affiliates	1	0	1	1
Investments in unconsolidated affiliates	3		3		3
Intangible assets, net	122		122		125
Goodwill	956		956		956
Reportable Business Segments [Member] | NGL Pipelines & Services [Member]
Information by business segment [Abstract]
Segment gross operating margin	1,327	1,098	2,552	2,184
Revenues from third parties	6,374	3,584	12,126	7,165
Revenues from related parties	6	3	8	6
Intersegment and intrasegment revenues	19,098	10,298	37,413	23,387
Total revenues	25,478	13,885	49,547	30,558
Equity in income of unconsolidated affiliates	36	29	70	57
Property, plant and equipment, net	17,452		17,452		17,202
Investments in unconsolidated affiliates	650		650		656
Intangible assets, net	884		884		317
Goodwill	2,811		2,811		2,652
Segment assets	21,797		21,797		20,827
Reportable Business Segments [Member] | Crude Oil Pipelines & Services [Member]
Information by business segment [Abstract]
Segment gross operating margin	407	419	822	819
Revenues from third parties	5,380	2,501	9,443	4,658
Revenues from related parties	5	3	14	11
Intersegment and intrasegment revenues	11,957	7,876	21,871	15,296
Total revenues	17,342	10,380	31,328	19,965
Equity in income of unconsolidated affiliates	70	130	151	249
Property, plant and equipment, net	6,862		6,862		6,974
Investments in unconsolidated affiliates	1,690		1,690		1,738
Intangible assets, net	1,819		1,819		1,860
Goodwill	1,841		1,841		1,841
Segment assets	12,212		12,212		12,413
Reportable Business Segments [Member] | Natural Gas Pipelines & Services [Member]
Information by business segment [Abstract]
Segment gross operating margin	229	202	449	737
Revenues from third parties	1,653	706	2,797	2,290
Revenues from related parties	8	3	13	6
Intersegment and intrasegment revenues	218	149	421	295
Total revenues	1,879	858	3,231	2,591
Equity in income of unconsolidated affiliates	0	2	2	3
Property, plant and equipment, net	9,916		9,916		8,560
Investments in unconsolidated affiliates	31		31		31
Intangible assets, net	1,231		1,231		849
Goodwill	0		0		0
Segment assets	11,178		11,178		9,440
Reportable Business Segments [Member] | Petrochemical & Refined Products Services [Member]
Information by business segment [Abstract]
Segment gross operating margin	421	326	825	608
Revenues from third parties	2,634	2,650	4,667	4,469
Revenues from related parties	0	0	0	0
Intersegment and intrasegment revenues	5,290	6,596	8,512	12,830
Total revenues	7,924	9,246	13,179	17,299
Equity in income of unconsolidated affiliates	1	0	1	1
Property, plant and equipment, net	7,686		7,686		7,736
Investments in unconsolidated affiliates	3		3		3
Intangible assets, net	122		122		125
Goodwill	956		956		956
Segment assets	8,767		8,767		8,820
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	(36,563)	(24,919)	(68,217)	(51,808)
Total revenues	(36,563)	(24,919)	(68,217)	(51,808)
Equity in income of unconsolidated affiliates	0	$ 0	0	$ 0
Adjustments [Member]
Information by business segment [Abstract]
Property, plant and equipment, net	2,213		2,213		1,616
Investments in unconsolidated affiliates	0		0		0
Intangible assets, net	0		0		0
Goodwill	0		0		0
Segment assets	$ 2,213		$ 2,213		$ 1,616