Asset Retirement Obligations (AROs) (Impact Of The Revisions On Asset Retirement Obligation) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
PSEG [Member]
ARO Liability as of January 1, 2011	$ 461
Liabilities Settled	(6)
Liabilities Incurred	2
Accretion Expense	19
Accretion Expense Deferred and Recovered in Rate Base	13	[1]
ARO Liability as of December 31, 2011	489
Power [Member]
ARO Liability as of January 1, 2011	242
Liabilities Settled	(1)
Liabilities Incurred	0
Accretion Expense	18
Accretion Expense Deferred and Recovered in Rate Base	0	[1]
ARO Liability as of December 31, 2011	259
PSE&G [Member]
ARO Liability as of January 1, 2011	216
Liabilities Settled	(5)
Liabilities Incurred	2
Accretion Expense	0
Accretion Expense Deferred and Recovered in Rate Base	13	[1]
ARO Liability as of December 31, 2011	226
Other [Member]
ARO Liability as of January 1, 2011	3
Liabilities Settled	0
Liabilities Incurred	0
Accretion Expense	1
Accretion Expense Deferred and Recovered in Rate Base	0	[1]
ARO Liability as of December 31, 2011	$ 4

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