Consolidated Statements Of Stockholders' Equity (USD $) In Millions, unless otherwise specified	Total	Common Stock [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]	PSE&G [Member]	PSE&G [Member] Common Stock [Member]	PSE&G [Member] Contributed Capital [Member]	PSE&G [Member] Basis Adjustment [Member]	PSE&G [Member] Retained Earnings [Member]	PSE&G [Member] Accumulated Other Comprehensive Income (Loss) [Member]	Power [Member]	Power [Member] Contributed Capital [Member]	Power [Member] Basis Adjustment [Member]	Power [Member] Retained Earnings [Member]	Power [Member] Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance (in value) at Dec. 31, 2011	$ 10,272	$ 4,823	$ (601)	$ 6,385	$ (337)	$ 2	$ 4,647	$ 892	$ 420	$ 986	$ 2,347	$ 2	$ 5,566	$ 2,121	$ (986)	$ 4,707	$ (276)
Beginning Balance, shares at Dec. 31, 2011		534	(28)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,275			1,275			528				528		666			666
Other Comprehensive Income (Loss), net of tax
Other Comprehensive Income (Loss), net of tax	(51)				(51)	0	0					0	(52)				(52)
Comprehensive Income	1,224						528						614
Contributed Capital							0						69	69
Cash Dividends on Common Stock	(718)			(718)	0	0							(619)			(619)
Noncontrolling Interest in Losses of Consolidated Entity	(1)					(1)
Other	4	10	(6)	0	0	0
Ending Balance (in value) at Dec. 31, 2012	10,781	4,833	(607)	6,942	(388)	1	5,175	892	420	986	2,875	2	5,630	2,190	(986)	4,754	(328)
Ending Balance, shares at Dec. 31, 2012		534	(28)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,243			1,243			612				612		644			644
Other Comprehensive Income (Loss), net of tax
Other Comprehensive Income (Loss), net of tax	293				293		(1)					(1)	265				265
Comprehensive Income	1,536						611						909
Contributed Capital							100		100				24	24
Cash Dividends on Common Stock	(728)			(728)									(705)			(705)
Other	20	28	(8)
Ending Balance (in value) at Dec. 31, 2013	11,609	4,861	(615)	7,457	(95)	1	5,886	892	520	986	3,487	1	5,858	2,214	(986)	4,693	(63)
Ending Balance, shares at Dec. 31, 2013		534	(28)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,518			1,518			725				725		760			760
Other Comprehensive Income (Loss), net of tax
Other Comprehensive Income (Loss), net of tax	(188)				(188)		1					1	(165)				(165)
Comprehensive Income	1,330						726						595
Contributed Capital							175		175				0
Cash Dividends on Common Stock	(748)			(748)									(895)			(895)
Other	(5)	15	(20)
Ending Balance (in value) at Dec. 31, 2014	$ 12,186	$ 4,876	$ (635)	$ 8,227	$ (283)	$ 1	$ 6,787	$ 892	$ 695	$ 986	$ 4,212	$ 2	$ 5,558	$ 2,214	$ (986)	$ 4,558	$ (228)
Ending Balance, shares at Dec. 31, 2014		534	(28)