Comprehensive Income, Net Of Tax (Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Millions	Sep. 30, 2011		Dec. 31, 2010		Sep. 30, 2010		Dec. 31, 2009
Derivative Contracts	$ 31		$ 111	[1]	$ 178		$ 180	[1]
Pension and OPEB Plans	(324)		(377)	[1]	(381)		(400)	[1]
NDT Funds	32		109	[1]	91		91	[1]
Other	5		1	[1]	1		13	[1]
Accumulated Other Comprehensive Income (Loss)	(256)		(156)	[1]	(111)		(116)	[1]
Power [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Derivative Contracts	(80)	[2]			(2)	[2]
Pension and OPEB Plans	45	[2]			18	[2]
NDT Funds	(77)	[2]			0	[2]
Other	0	[2]			(3)	[2]
Accumulated Other Comprehensive Income (Loss)	(112)	[2]			13	[2]
Power [Member]
Accumulated Other Comprehensive Income (Loss)	(207)		(95)
Accumulated other comprehensive income loss derivative contracts net of tax	54				1
Accumulated other comprehensive income loss pension and other postretirement plans net of tax	(31)				(12)
Accumulated other comprehensive income loss other net of tax	78				1
PSE&G [Member]
Derivative Contracts	0	[3]			0	[3]
Pension and OPEB Plans	0	[3]			0	[3]
NDT Funds	0	[3]			0	[3]
Other	2	[3]			(5)	[3]
Accumulated Other Comprehensive Income (Loss)	2	[3]	0		(5)	[3]
Accumulated other comprehensive income loss other net of tax	(1)				3
Other [Member]
Derivative Contracts	0				0
Pension and OPEB Plans	8				1
NDT Funds	0				0
Other	2				(4)
Accumulated Other Comprehensive Income (Loss)	10				(3)
Accumulated other comprehensive income loss other net of tax	$ (7)				$ 2

[1] Net of tax related to Derivative Contracts, Pension and OPEB Plans and NDT Funds/Other of $54 million, $(31) million and $78 million, respectively for the nine months ended September 30, 2011. Net of tax related to Derivative Contracts, Pension and OPEB Plans and NDT Funds/Other of $1 million, $(12) million and $1 million, respectively for the nine months ended September 30, 2010.

[2] Net of tax of $(1) million for the nine months ended September 30, 2011 and $3 million for the nine months ended September 30, 2010.

[3] Net of tax of $(7) million for the nine months ended September 30, 2011 and $2 million for the nine months ended September 30, 2010.