Selected Quarterly Data (Schedule Of Selected Quarterly Data) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule of Quarterly Data [Line Items]
Operating Revenues	$ 2,278	$ 2,688	$ 2,314	$ 3,135	$ 2,773	$ 2,641	$ 2,249	$ 3,223	$ 10,415	$ 10,886	$ 9,968
Operating Income (Loss)	532	814	568	1,048	807	746	365	705	2,962	2,623	2,299
Net Income (Loss)	$ 309	$ 439	$ 345	$ 586	$ 476	$ 444	$ 212	$ 386
Net Income (Loss)									$ 1,679	$ 1,518	$ 1,243
Basic	505	505	506	506	506	506	506	506	505	506	506
Diluted	508	508	508	508	508	507	508	508	508	508	508
Earnings Per Share, Basic	$ 0.61	$ 0.87	$ 0.68	$ 1.16	$ 0.94	$ 0.88	$ 0.42	$ 0.76	$ 3.32	$ 3.00	$ 2.46
Earnings Per Share, Diluted	$ 0.60	$ 0.87	$ 0.68	$ 1.15	$ 0.94	$ 0.87	$ 0.42	$ 0.76	$ 3.30	$ 2.99	$ 2.45
PSE&G [Member]
Schedule of Quarterly Data [Line Items]
Operating Revenues	$ 1,402	$ 1,766	$ 1,466	$ 2,002	$ 1,531	$ 1,655	$ 1,435	$ 2,145	$ 6,636	$ 6,766	$ 6,655
Operating Income (Loss)	287	404	320	451	308	383	291	411	1,462	1,393	1,235
Net Income (Loss)	156	222	167	242	160	200	151	214
Net Income (Loss)									787	725	612
Power [Member]
Schedule of Quarterly Data [Line Items]
Operating Revenues	1,082	1,096	1,025	1,725	1,610	1,138	986	1,700	4,928	5,434	5,063
Operating Income (Loss)	227	391	228	584	507	353	67	282	1,430	1,209	1,070
Net Income (Loss)	$ 149	$ 206	$ 166	$ 335	$ 320	$ 222	$ 54	$ 164
Net Income (Loss)									$ 856	$ 760	$ 644