Business Segments, Segment Reporting Information (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Information by business segment [Abstract]
Gross operating margin		$ 9,376	$ 9,356	$ 8,508
Revenues from third parties		49,654	58,127	40,727
Revenues from related parties		61	59	80
Intersegment and intrasegment revenues		0	0	0
Total revenues		49,715	58,186	40,807
Equity in income of unconsolidated affiliates		462	464	583
Property, plant and equipment, net		45,804	44,401	42,088
Investments in unconsolidated affiliates		2,330	2,352	2,428
Intangible assets, net		3,770	3,965	3,151
Goodwill		5,608	5,608	5,449
Segment assets		57,512	56,326	53,116
NGL Pipelines and Services [Member]
Information by business segment [Abstract]
Total revenues		17,645	24,259	16,302
Equity in income of unconsolidated affiliates		133	149	120
Intangible assets, net		828	865
Goodwill		2,811	2,811	2,652
Crude Oil Pipelines & Services [Member]
Information by business segment [Abstract]
Total revenues		19,336	18,561	10,902
Equity in income of unconsolidated affiliates		320	308	456
Intangible assets, net		1,673	1,776
Goodwill		1,841	1,841	1,841
Natural Gas Pipelines & Services [Member]
Information by business segment [Abstract]
Total revenues		3,776	6,260	4,400
Equity in income of unconsolidated affiliates		6	5	6
Intangible assets, net		1,158	1,206
Goodwill	[1]	0	0	0
Petrochemical & Refined Products Services [Member]
Information by business segment [Abstract]
Total revenues		8,958	9,106	9,203
Equity in income of unconsolidated affiliates		3	2	1
Intangible assets, net		111	118
Goodwill	[1]	956	956	956
Reportable Business Segments [Member] | NGL Pipelines and Services [Member]
Information by business segment [Abstract]
Gross operating margin		4,898	5,142	4,316
Revenues from third parties		17,635	24,244	16,293
Revenues from related parties		10	15	9
Intersegment and intrasegment revenues		45,490	65,760	55,796
Total revenues		63,135	90,019	72,098
Equity in income of unconsolidated affiliates		133	149	120
Property, plant and equipment, net		17,541	17,283	17,202
Investments in unconsolidated affiliates		612	640	656
Intangible assets, net		828	865	317
Goodwill		2,811	2,811	2,652
Segment assets		21,792	21,599	20,827
Reportable Business Segments [Member] | Crude Oil Pipelines & Services [Member]
Information by business segment [Abstract]
Gross operating margin		1,707	1,655	1,680
Revenues from third parties		19,300	18,548	10,849
Revenues from related parties		36	13	53
Intersegment and intrasegment revenues		57,122	46,625	29,985
Total revenues		76,458	65,186	40,887
Equity in income of unconsolidated affiliates		320	308	456
Property, plant and equipment, net		6,627	6,760	6,974
Investments in unconsolidated affiliates		1,681	1,677	1,738
Intangible assets, net		1,673	1,776	1,860
Goodwill		1,841	1,841	1,841
Segment assets		11,822	12,054	12,413
Reportable Business Segments [Member] | Natural Gas Pipelines & Services [Member]
Information by business segment [Abstract]
Gross operating margin		1,077	1,042	1,155
Revenues from third parties		3,761	6,229	4,382
Revenues from related parties		15	31	18
Intersegment and intrasegment revenues		527	888	650
Total revenues		4,303	7,148	5,050
Equity in income of unconsolidated affiliates		6	5	6
Property, plant and equipment, net		10,019	9,721	8,560
Investments in unconsolidated affiliates		33	32	31
Intangible assets, net		1,158	1,206	849
Goodwill		0	0	0
Segment assets		11,210	10,959	9,440
Reportable Business Segments [Member] | Petrochemical & Refined Products Services [Member]
Information by business segment [Abstract]
Gross operating margin		1,694	1,517	1,357
Revenues from third parties		8,958	9,106	9,203
Revenues from related parties		0	0	0
Intersegment and intrasegment revenues		18,882	18,304	22,110
Total revenues		27,840	27,410	31,313
Equity in income of unconsolidated affiliates		3	2	1
Property, plant and equipment, net		9,372	7,770	7,736
Investments in unconsolidated affiliates		4	3	3
Intangible assets, net		111	118	125
Goodwill		956	956	956
Segment assets		10,443	8,847	8,820
Eliminations [Member]
Information by business segment [Abstract]
Revenues from third parties		0	0	0
Revenues from related parties		0	0	0
Intersegment and intrasegment revenues		(122,021)	(131,577)	(108,541)
Total revenues		(122,021)	(131,577)	(108,541)
Equity in income of unconsolidated affiliates		0	0	0
Adjustments [Member]
Information by business segment [Abstract]
Property, plant and equipment, net		2,245	2,867	1,616
Investments in unconsolidated affiliates		0	0	0
Intangible assets, net		0	0	0
Goodwill		0	0	0
Segment assets		$ 2,245	$ 2,867	$ 1,616

[1] Balances are presented net of historical accumulated impairment losses of $296 million for the Natural Gas Pipelines & Service segment and $1 million for the Petrochemical & Refined Products Services segment.  There have been no goodwill impairment charges recognized for the reporting units within the NGL Pipelines & Services and Crude Oil Pipelines & Services segments.