Asset Retirement Obligations (AROs) (Impact Of The Revisions On Asset Retirement Obligation) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
ARO Liability, Beginning Balance		$ 679	$ 743
Liabilities Settled		(13)	(5)
Liabilities Incurred		25	14
Accretion Expense		26	26
Accretion Expense Deferred and Recovered in Rate Base	[1]	12	16
Asset Retirement Obligation, Revision of Estimate		(3)	(115)
ARO Liability, Ending Balance		726	679
PSE&G [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
ARO Liability, Beginning Balance		218	290
Liabilities Settled		(9)	(4)
Liabilities Incurred		2	1
Accretion Expense		0	0
Accretion Expense Deferred and Recovered in Rate Base	[1]	12	16
Asset Retirement Obligation, Revision of Estimate		(10)	(85)
ARO Liability, Ending Balance		213	218
Power [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
ARO Liability, Beginning Balance		457	450
Liabilities Settled		(4)	(1)
Liabilities Incurred		23	12
Accretion Expense		26	26
Accretion Expense Deferred and Recovered in Rate Base	[1]	0	0
Asset Retirement Obligation, Revision of Estimate		9	(30)
ARO Liability, Ending Balance		511	457
Other [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
ARO Liability, Beginning Balance		4	3
Liabilities Settled		0	0
Liabilities Incurred		0	1
Accretion Expense		0	0
Accretion Expense Deferred and Recovered in Rate Base	[1]	0	0
Asset Retirement Obligation, Revision of Estimate		(2)	0
ARO Liability, Ending Balance		$ 2	$ 4

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