Property, Plant and Equipment (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Property, Plant and Equipment
Property, Plant and Equipment, at Cost	$ 4,713	$ 4,059
Accumulated depreciation	(702)	(615)
Property, Plant and Equipment, Net	4,011	3,444
Gathering and Processing
Property, Plant and Equipment
Property, Plant and Equipment, at Cost	2,593	1,983
Terminalling and Transportation
Property, Plant and Equipment
Property, Plant and Equipment, at Cost	$ 2,120	$ 2,076