Asset Retirement Obligations (AROs) (Impact Of The Revisions On Asset Retirement Obligation) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
ARO Liability, Beginning Balance	$ 677		$ 627
Liabilities Settled	(2)		(5)
Liabilities Incurred	23		17
Accretion Expense Deferred and Recovered in Rate Base	15	[1]	15	[1]
ARO Liability, Ending Balance	743		677
Power [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
ARO Liability, Beginning Balance	400		374
Liabilities Settled	0		(1)
Liabilities Incurred	20		4
Accretion Expense	30		23		21
Accretion Expense Deferred and Recovered in Rate Base	0	[1]	0	[1]
ARO Liability, Ending Balance	450		400		374
PSE&G [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
ARO Liability, Beginning Balance	274		250
Liabilities Settled	(2)		(4)
Liabilities Incurred	3		13
Accretion Expense	0		0
Accretion Expense Deferred and Recovered in Rate Base	15	[1]	15	[1]
ARO Liability, Ending Balance	290		274
Other [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
ARO Liability, Beginning Balance	3		3
Liabilities Settled	0		0
Liabilities Incurred	0		0
Accretion Expense	0		0
Accretion Expense Deferred and Recovered in Rate Base	0	[1]	0	[1]
ARO Liability, Ending Balance	$ 3		$ 3

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