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Acquisitions and Related Transactions Acquisitions (2018 Transactions) (Details) - USD ($) $ in Millions	1 Months Ended		12 Months Ended
	Jan. 31, 2018	Oct. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Goodwill, Impairment Loss			$ 895	$ 897
Payments to Acquire Businesses, Gross		$ 382
Subsequent Event [Member] | CDM Contribution [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	$ 1,700
Payments to Acquire Businesses, Gross	$ 1,225
USA Compression Partners, LP [Member] | Subsequent Event [Member] | CDM Contribution [Member]
Business Acquisition [Line Items]
Sale of Stock, Number of Shares Issued in Transaction	19,191,351
Equity Issued in Business Combination, Fair Value Disclosure	$ 335
USA Compression Partners, LP [Member] | Subsequent Event [Member] | CDM Contribution [Member] | Class B Units [Member]
Business Acquisition [Line Items]
Sale of Stock, Number of Shares Issued in Transaction	6,397,965
Equity Issued in Business Combination, Fair Value Disclosure	$ 112
ETE [Member] | USA Compression Partners, LP [Member] | Subsequent Event [Member] | CDM Contribution [Member]
Business Acquisition [Line Items]
Sale of Stock, Number of Shares Issued in Transaction	12,466,912
Equity Issued in Business Combination, Fair Value Disclosure	$ 250
Investment In Sunoco LP [Member]
Business Acquisition [Line Items]
Goodwill, Impairment Loss			102
Retail Divestment [Member]
Business Acquisition [Line Items]
Goodwill, Impairment Loss			$ 285	$ 447	$ 0

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