Comprehensive Income, Net Of Tax (Comprehensive Income) (Details) (USD $) In Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010
Net Income	$ 294		$ 567		$ 1,143		$ 1,282
Other Comprehensive Income (Loss)	(77)		28		(100)		5
Comprehensive Income	217		595		1,043		1,287
Power [Member]
Net Income	302		384		871		952
Other Comprehensive Income (Loss)	(80)		38		(112)		13
Comprehensive Income	222		422		759		965
PSE&G [Member]
Net Income	154		155		422		276
Other Comprehensive Income (Loss)	1		(6)		2		(5)
Comprehensive Income	155		149		424		271
Other [Member]
Net Income	(162)	[1]	28	[1]	(150)	[1]	54	[1]
Other Comprehensive Income (Loss)	2	[1]	(4)	[1]	10	[1]	(3)	[1]
Comprehensive Income	$ (160)	[1]	$ 24	[1]	$ (140)	[1]	$ 51	[1]

[1] Other consists of activity at PSEG (as parent company), Energy Holdings, Services and intercompany eliminations.