Comprehensive Income, Net Of Tax (Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010	Dec. 31, 2009
Derivative Contracts	$ 54	$ 111	$ 177	$ 180
Pension and OPEB Plans	(328)	(377)	(387)	(400)
NDT Funds	92	109	57	91
Other	3	1	14	13
Accumulated Other Comprehensive Income (Loss)	(179)	(156)	(139)	(116)
Power [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Derivative Contracts	(57)		(4)
Pension and OPEB Plans	42		13
NDT Funds	(17)		(34)
Other	0		0
Accumulated Other Comprehensive Income (Loss)	(32)		(25)
Power [Member]
Accumulated Other Comprehensive Income (Loss)	(127)	(95)
PSE&G [Member]
Derivative Contracts	0		0
Pension and OPEB Plans	0		0
NDT Funds	0		0
Other	1		1
Accumulated Other Comprehensive Income (Loss)	1	0	1
Other [Member]
Derivative Contracts	0		1
Pension and OPEB Plans	7		0
NDT Funds	0		0
Other	1		0
Accumulated Other Comprehensive Income (Loss)	$ 8		$ 1