Condensed Consolidated Statements Of Operations Statements of Operations (Paranthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Paranthetical [Abstract]
Natural Gas Midstream Revenue	$ 22	$ 14	$ 56	$ 29
NGL sales, related party amounts	11	0	23	24
Gas Gathering, Transportation, Marketing and Processing Revenue	6	9	20	23
Other Revenue, Net	0	0	0	1
Cost of sales, related party amounts	8	12	35	25
Operating and Maintenance, related party amounts	0	2	0	21
General and administrative, related party amounts	$ 2	$ 4	$ 9	$ 13