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Estimates (Schedule Of Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017		Dec. 31, 2016
Goodwill [Roll Forward]
Goodwill	$ 5,670	[1]	$ 6,056
Goodwill acquired	12		509
Goodwill	4,768		5,670	[1]
Goodwill impairment	(895)		(897)
Goodwill, Other Changes	(19)		2
Goodwill, Written off Related to Sale of Business Unit			0
Investment In ETP [Member]
Goodwill [Roll Forward]
Goodwill	3,897		5,428
Goodwill acquired	12		428
Goodwill	3,115		3,897
Goodwill impairment	(793)		(670)
Goodwill, Other Changes	(1)		0
Goodwill, Written off Related to Sale of Business Unit			(1,289)
Investment In Sunoco LP [Member]
Goodwill [Roll Forward]
Goodwill	1,550		1,694
Goodwill acquired	0		81
Goodwill	1,430		1,550
Goodwill impairment	(102)
Goodwill, Other Changes	(18)		2
Goodwill, Written off Related to Sale of Business Unit			0
Investment in Lake Charles LNG [Member]
Goodwill [Roll Forward]
Goodwill	184		184
Goodwill acquired	0		0
Goodwill	184		184
Goodwill impairment	0		0
Goodwill, Other Changes	0		0
Goodwill, Written off Related to Sale of Business Unit			0
Corporate, Other and Eliminations [Member]
Goodwill [Roll Forward]
Goodwill	39		(1,250)
Goodwill acquired	0		0
Goodwill	39		39
Goodwill impairment	0		0
Goodwill, Other Changes	$ 0		0
Goodwill, Written off Related to Sale of Business Unit			$ 1,289
[1] * As adjusted. See Note 2.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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