Selected Quarterly Data (Schedule Of Selected Quarterly Data) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Quarterly Data [Line Items]
Operating Revenues	$ 2,773	$ 2,641	$ 2,249	$ 3,223	$ 2,318	$ 2,554	$ 2,310	$ 2,786	$ 10,886	$ 9,968	$ 9,781
Operating Income (Loss)	807	746	365	705	365	712	612	610	2,623	2,299	2,278
Net Income (Loss)	476	444	212	386	200	390	333	320
Net Income (Loss)									1,518	1,243	1,275
Basic	506	506	506	506	506	506	506	507	506	506	506
Diluted	508	507	508	508	508	508	508	507	508	508	507
Earnings Per Share, Basic	$ 0.94	$ 0.88	$ 0.42	$ 0.76	$ 0.40	$ 0.77	$ 0.66	$ 0.63	$ 3.00	$ 2.46	$ 2.52
Earnings Per Share, Diluted	$ 0.94	$ 0.87	$ 0.42	$ 0.76	$ 0.39	$ 0.77	$ 0.66	$ 0.63	$ 2.99	$ 2.45	$ 2.51
PSE&G [Member]
Schedule of Quarterly Data [Line Items]
Operating Revenues	1,531	1,655	1,435	2,145	1,571	1,666	1,423	1,995	6,766	6,655	6,626
Operating Income (Loss)	308	383	291	411	271	346	253	365	1,393	1,235	1,083
Net Income (Loss)	160	200	151	214	144	168	121	179
Net Income (Loss)									725	612	528
Power [Member]
Schedule of Quarterly Data [Line Items]
Operating Revenues	1,610	1,138	986	1,700	1,245	1,174	1,193	1,451	5,434	5,063	4,873
Operating Income (Loss)	507	353	67	282	107	370	351	242	1,209	1,070	1,123
Net Income (Loss)	320	222	54	164	67	226	210	141
Net Income (Loss)									$ 760	$ 644	$ 666