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, 2016		Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015		Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule of Quarterly Data [Line Items]
Operating Revenues	$ 2,090		$ 2,450	$ 1,905	$ 2,616	$ 2,278		$ 2,688	$ 2,314	$ 3,135	$ 9,061	$ 10,415	$ 10,886
Operating Income (Loss)	(175)		577	347	827	532		814	568	1,048	1,576	2,962	2,623
Net Income (Loss)	$ (98)	[1]	$ 327	$ 187	$ 471	$ 309	[1]	$ 439	$ 345	$ 586
Net Income (Loss)											$ 887	$ 1,679	$ 1,518
Basic	505		505	505	505	505		505	506	506	505	505	506
Diluted	508		508	508	508	508		508	508	508	508	508	508
Earnings Per Share, Basic	$ (0.19)		$ 0.65	$ 0.37	$ 0.93	$ 0.61		$ 0.87	$ 0.68	$ 1.16	$ 1.76	$ 3.32	$ 3.00
Earnings Per Share, Diluted	$ (0.19)		$ 0.64	$ 0.37	$ 0.93	$ 0.60		$ 0.87	$ 0.68	$ 1.15	$ 1.75	$ 3.30	$ 2.99
PSE&G [Member]
Schedule of Quarterly Data [Line Items]
Operating Revenues	$ 1,475		$ 1,684	$ 1,350	$ 1,712	$ 1,402		$ 1,766	$ 1,466	$ 2,002	$ 6,221	$ 6,636	$ 6,766
Operating Income (Loss)	369		450	333	462	287		404	320	451	1,614	1,462	1,393
Net Income (Loss)	193		255	179	262	156		222	167	242
Net Income (Loss)											889	787	725
Power [Member]
Schedule of Quarterly Data [Line Items]
Operating Revenues	921		1,075	714	1,313	1,082		1,096	1,025	1,725	4,023	4,928	5,434
Operating Income (Loss)	(556)		238	(12)	343	227		391	228	584	13	1,430	1,209
Net Income (Loss)	$ (302)	[1]	$ 139	$ (11)	$ 192	$ 149	[1]	$ 206	$ 166	$ 335
Net Income (Loss)											$ 18	$ 856	$ 760

[1] The decreases in Operating Income at PSEG consolidated and Power in the fourth quarter 2016 as compared to the same quarter in 2015 were primarily due to costs related to closing the coal/gas Hudson and Mercer units and higher MTM losses in 2016.