Comprehensive Income, Net Of Tax (Comprehensive Income) (Details) (USD $) In Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
Net Income	$ 323		$ 224		$ 849		$ 715
Other Comprehensive Income (Loss)	8		(115)		(23)		(23)
Comprehensive Income	331		109		826		692
Power [Member]
Net Income	208		204		569		568
Other Comprehensive Income (Loss)	1		(116)		(32)		(25)
Comprehensive Income	209		88		537		543
PSE&G [Member]
Net Income	105		3		268		121
Other Comprehensive Income (Loss)	0		1		1		1
Comprehensive Income	105		4		269		122
Other [Member]
Net Income	10	[1]	17	[1]	12	[1]	26	[1]
Other Comprehensive Income (Loss)	7	[1]	0	[1]	8	[1]	1	[1]
Comprehensive Income	$ 17	[1]	$ 17	[1]	$ 20	[1]	$ 27	[1]

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