Asset Retirement Obligations (AROs) (Impact Of The Revisions On Asset Retirement Obligation) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
ARO Liability, Beginning Balance		$ 1,024	$ 726
Liabilities Settled		(10)	(29)
Liabilities Incurred		1	1
Accretion Expense		41	30
Accretion Expense Deferred and Recovered in Rate Base	[1]	12	12
Revision to Present Value of Future Cash Flows		(5)	284
ARO Liability, Ending Balance		1,063	1,024
PSE&G [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
ARO Liability, Beginning Balance		212	213
Liabilities Settled		(9)	(8)
Liabilities Incurred		0	0
Accretion Expense		0	0
Accretion Expense Deferred and Recovered in Rate Base	[1]	12	12
Revision to Present Value of Future Cash Flows		87	(5)
ARO Liability, Ending Balance		302	212
Power [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
ARO Liability, Beginning Balance		810	511
Liabilities Settled		(1)	(21)
Liabilities Incurred		1	1
Accretion Expense		41	30
Accretion Expense Deferred and Recovered in Rate Base	[1]	0	0
Revision to Present Value of Future Cash Flows		(93)	289
ARO Liability, Ending Balance		758	810
Increase in ARO liability due to higher probability of early retirement			276
Other [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
ARO Liability, Beginning Balance		2	2
Liabilities Settled		0	0
Liabilities Incurred		0	0
Accretion Expense		0	0
Accretion Expense Deferred and Recovered in Rate Base	[1]	0	0
Revision to Present Value of Future Cash Flows		1	0
ARO Liability, Ending Balance		$ 3	$ 2

[1] Not reflected as expense in Consolidated Statements of Operations