Property, Plant and Equipment (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment
Gross Property, Plant and Equipment	$ 3,617	$ 3,551
Accumulated depreciation	(282)	(245)
Net Property, Plant and Equipment	3,335	3,306	[1]
Gathering
Property, Plant and Equipment
Gross Property, Plant and Equipment	1,558	1,507
Processing
Property, Plant and Equipment
Gross Property, Plant and Equipment	541	539
Terminalling and Transportation
Property, Plant and Equipment
Gross Property, Plant and Equipment	1,492	1,478
Other
Property, Plant and Equipment
Gross Property, Plant and Equipment	26	27
Green River Processing, LLC
Property, Plant and Equipment
Gross Property, Plant and Equipment	317	317
Accumulated depreciation	(41)	(39)
Net Property, Plant and Equipment	$ 276	$ 278

[1] Presentation of the condensed consolidating balance sheet as of December 31, 2014 has been adjusted to conform to the current period presentation.