Partners' Capital Series A Preferred Units (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Mar. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Mar. 30, 2022	Feb. 14, 2018	Jan. 25, 2018	Nov. 14, 2017	Aug. 15, 2017
Preferred Units, Issued	12,000,000
Shares Issued, Price Per Share	$ 25.00
Distribution rate	10.00%
Preferred Stock, Liquidation Preference Per Share	$ 25.00
Distributions Per Partnership Unit	$ 2.50
Proceeds from issuance of common units, net of offering costs		$ 33	$ 71	$ 899
Scenario, Forecast [Member]
Distribution rate					8.00%
Series A Preferred Unit [Member]
Preferred Unit, Quarterly Distribution		8						$ 7	$ 8
Series A Preferred Unit [Member] \| Scenario, Forecast [Member]
Redemption price					101.00%
ETE [Member]
Proceeds from issuance of common units, net of offering costs	$ 300	$ 300	$ 61	$ 0
Subsequent Event [Member]
Series A Preferred Unit, Redemption Amount							$ 313
Subsequent Event [Member] \| Series A Preferred Unit [Member]
Preferred Unit, Quarterly Distribution						$ 8