Organization And Summary Of Significant Accounting Policies Combined Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues	$ 665	$ 527	$ 1,844	$ 1,413
Net income (loss)	42	(1)	24	42
Regency [Member]
Revenues	665	313	1,576	983
Net income (loss)	42	(1)	60	57
SUGS [Member]
Revenues	0	214	268	430
Net income (loss)	0	0	(36)	(15)
Combined [Member]
Revenues	665	527	1,844	1,413
Net income (loss)	$ 42	$ (1)	$ 24	$ 42