Operations And Organization Goodwill Impairment (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Goodwill [Line Items]
Goodwill	$ 2,418	$ 3,868	$ 3,835	$ 5,167	[1]
Goodwill, Impairment Loss	(1,454)		(1,325)
Goodwill, Other Increase (Decrease)	4	33	(7)
Intrastate Transportation And Storage [Member]
Goodwill [Line Items]
Goodwill	10	10	10	10
Goodwill, Impairment Loss	0		0
Goodwill, Other Increase (Decrease)	0	0	0
Interstate Transportation and Storage [Member]
Goodwill [Line Items]
Goodwill	0	43	43	226
Goodwill, Impairment Loss	(43)		(183)
Goodwill, Other Increase (Decrease)	0	0	0
Midstream [Member]
Goodwill [Line Items]
Goodwill	0	0	0	483
Goodwill, Impairment Loss	0		(483)
Goodwill, Other Increase (Decrease)	0	0	0
NGL and refined products transportation and services [Member]
Goodwill [Line Items]
Goodwill	693	693	693	693
Goodwill, Impairment Loss	0		0
Goodwill, Other Increase (Decrease)	0	0	0
Crude oil transportation and services [Member]
Goodwill [Line Items]
Goodwill	52	1,397	1,397	1,397
Goodwill, Impairment Loss	(1,279)		0
Goodwill, Other Increase (Decrease)	(66)	0	0
Investment In Sunoco LP [Member]
Goodwill [Line Items]
Goodwill	1,555	1,555	1,555	1,555
Goodwill, Impairment Loss	0		0
Goodwill, Other Increase (Decrease)	0	0	0
Investment In USAC [Member]
Goodwill [Line Items]
Goodwill	0	0	0	619
Goodwill, Impairment Loss	0		(619)
Goodwill, Other Increase (Decrease)	0	0	0
Other Segments [Member]
Goodwill [Line Items]
Goodwill	108	170	137	$ 184
Goodwill, Impairment Loss	(132)		(40)
Goodwill, Other Increase (Decrease)	$ 70	$ 33	$ (7)

[1] *As adjusted. See Note 1.