Condensed Consolidated Statements of Stockholders Equity Condensed Consolidated Statements of Stockholders Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Treasury Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Public Service Electric and Gas Company [Member]	Public Service Electric and Gas Company [Member] Common Stock [Member]	Public Service Electric and Gas Company [Member] Retained Earnings [Member]	Public Service Electric and Gas Company [Member] AOCI Attributable to Parent [Member]	Public Service Electric and Gas Company [Member] Contributed Capital [Member]	Public Service Electric and Gas Company [Member] Basis Adjustment [Member]	PSEG Power [Member]	PSEG Power [Member] Retained Earnings [Member]	PSEG Power [Member] AOCI Attributable to Parent [Member]	PSEG Power [Member] Contributed Capital [Member]	PSEG Power [Member] Basis Adjustment [Member]
Shares, Outstanding		534	(29)
Cumulative Effect of New Accounting Principle in Period of Adoption				$ 176	$ (176)								$ 175	$ (175)
Total Stockholder's Equity	$ 13,847	$ 4,961	$ (763)	9,878	(229)	$ 9,834	$ 892	$ 6,861	$ 0	$ 1,095	$ 986	$ 5,967	4,911	(172)	$ 2,214	$ (986)
Net Income	827			827		550		550				275	275
Other Comprehensive Income (Loss), Net of Tax	(5)				(5)	0			0			(3)		(3)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	822					550						272
Dividends, Common Stock, Cash	(455)			(455)	0							(200)	(200)
Stockholders' Equity, Other	(56)	$ (6)	$ (50)	0	0
Stockholders' Equity, Other Shares		0	(1)
Shares, Outstanding		534	(30)
Total Stockholder's Equity	14,104	$ 4,946	$ (816)	10,385	(411)	10,152	892	7,180	(1)	1,095	986	6,196	5,320	(352)	2,214	(986)
Net Income	269			269		231		231				41	41
Other Comprehensive Income (Loss), Net of Tax	1				1	1			1			2		2
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	270					232						43
Dividends, Common Stock, Cash	(228)			(228)	0							(200)	(200)
Stockholders' Equity, Other	12	$ 9	$ 3	0	0
Stockholders' Equity, Other Shares		0	0
Shares, Outstanding		534	(30)
Total Stockholder's Equity	14,158	$ 4,955	$ (813)	10,426	(410)	10,384	892	7,411	0	1,095	986	6,039	5,161	(350)	2,214	(986)
Shares, Outstanding		534	(30)
Cumulative Effect of New Accounting Principle in Period of Adoption				81	(81)								69	(69)
Total Stockholder's Equity	14,377	$ 4,980	$ (808)	10,582	(377)	10,900	892	7,928	(1)	1,095	986	5,960	5,051	(319)	2,214	(986)
Net Income	853			853		630		630				256	256
Other Comprehensive Income (Loss), Net of Tax	26				26	2			2			34		34
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	879					632						290
Dividends, Common Stock, Cash	(475)			(475)	0							(250)	(250)
Stockholders' Equity, Other	(27)	$ 0	$ (27)	0	0
Stockholders' Equity, Other Shares		0	0
Shares, Outstanding		534	(30)
Total Stockholder's Equity	14,814	$ 4,969	$ (839)	11,125	(441)	11,304	892	8,331	0	1,095	986	6,022	5,166	(372)	2,214	(986)
Net Income	153			153		227		227				(40)	(40)
Other Comprehensive Income (Loss), Net of Tax	9				9	1			1			18		18
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	162					228						(22)
Dividends, Common Stock, Cash	(237)			(237)	0							0	0
Stockholders' Equity, Other	15	$ 11	$ 4	0	0
Stockholders' Equity, Other Shares		0	0
Shares, Outstanding		534	(30)
Total Stockholder's Equity	$ 14,754	$ 4,980	$ (835)	$ 11,041	$ (432)	$ 11,532	$ 892	$ 8,558	$ 1	$ 1,095	$ 986	$ 6,000	$ 5,126	$ (354)	$ 2,214	$ (986)