Selected Quarterly Data (Schedule Of Selected Quarterly Data) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended														6 Months Ended		12 Months Ended
	Dec. 31, 2018		Sep. 30, 2018	Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2017		Sep. 30, 2017	Jun. 30, 2017		Mar. 31, 2017		Jun. 30, 2018		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule of Quarterly Data [Line Items]
Operating Revenues	$ 2,468		$ 2,394			$ 2,818		$ 2,107		$ 2,254	$ 2,142		$ 2,591		$ 2,016		$ 9,696	$ 9,094	$ 8,966
Operating Income (Loss)	501	[1]	554			832	[1]	363	[1]	693	195	[1]	178	[1]	411	[1]	2,298	1,429	1,598
Net Income (Loss)	$ 199	[1]	$ 412			$ 558	[1]	$ 956	[1]	$ 395	$ 109	[1]	$ 114	[1]	$ 269	[1]
Net Income (Loss)																	$ 1,438	$ 1,574	$ 887
Basic	504		504			504		505		505	505		505		504		504	505	505
Diluted	508		507			507		508		507	507		508		507		507	507	508
Earnings Per Share, Basic	$ 0.39	[1]	$ 0.82			$ 1.11	[1]	$ 1.89	[1]	$ 0.78	$ 0.22	[1]	$ 0.23	[1]	$ 0.53	[1]	$ 2.85	$ 3.12	$ 1.76
Earnings Per Share, Diluted	$ 0.39	[1]	$ 0.81			$ 1.10	[1]	$ 1.88	[1]	$ 0.78	$ 0.22	[1]	$ 0.22	[1]	$ 0.53	[1]	$ 2.83	$ 3.10	$ 1.75
PSE&G [Member]
Schedule of Quarterly Data [Line Items]
Operating Revenues	$ 1,645		$ 1,595	$ 1,386		$ 1,845		$ 1,575		$ 1,530	$ 1,393		$ 1,826				$ 6,471	$ 6,324	$ 6,303
Operating Income (Loss)	345		421	358		482		396		461	380		523				1,606	1,760	1,629
Net Income (Loss)	239		278	231		319		220		246	208		299
Net Income (Loss)																	1,067	973	889
Power [Member]
Schedule of Quarterly Data [Line Items]
Operating Revenues	1,108		868	767		1,403		827		846	918		1,269				4,146	3,860	3,861
Operating Income (Loss)	113	[1]	112	42	[1]	329	[1]	(84)	[1]	211	(189)	[1]	(305)	[1]			596	(367)	17
Net Income (Loss)	$ (35)	[1]	$ 125	$ 41	[1]	$ 234	[1]	$ 610	[1]	$ 136	$ (97)	[1]	$ (170)	[1]
Net Income (Loss)																	$ 365	$ 479	$ 18

[1] The increases in Operating Income at PSEG consolidated and Power in the first and second quarters of 2018 as compared to the same quarters in 2017 were primarily due to higher costs in 2017 related to closing the coal/gas Hudson and Mercer units, which were fully depreciated as of June 1, 2017. The increases in Operating Income at PSEG consolidated and Power in the fourth quarter 2018 as compared to the same quarter in 2017 were primarily due to lower MTM losses and a gain on the sale of the Hudson and Mercer units.The decreases in Net Income at PSEG consolidated and Power in the fourth quarter 2018 as compared to the same quarter in 2017 also reflected the impact of the one-time benefit recorded in December 2017 as a result of the remeasurement of deferred tax balances and the inclusion in 2018 of net unrealized losses on equity investments in the NDT Fund in accordance with new accounting guidance.