Organization And Summary Of Significant Accounting Policies Revenue and net income breakdown between the Partnership and SUGS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues	$ 639	$ 511	$ 1,179	$ 886
Net income (loss)	11	28	(18)	43
Regency [Member]
Revenues	562	312	911	670
Net income (loss)	20	29	15	58
SUGS [Member]
Revenues	77	199	268	216
Net income (loss)	(9)	(1)	(33)	(15)
Combined [Domain]
Revenues	639	511	1,179	886
Net income (loss)	$ 11	$ 28	$ (18)	$ 43