Schedule Of Consolidated Debt (Estimated Fair Values) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010
Debt Instrument [Line Items]
Long-term Debt, Carrying Amount	$ 8,078
Power [Member]
Debt Instrument [Line Items]
Long-term Debt, Carrying Amount	2,767		3,473
PSE&G [Member]
Debt Instrument [Line Items]
Long-term Debt, Carrying Amount	4,277		4,291
Energy Holdings [Member]
Debt Instrument [Line Items]
Long-term Debt, Carrying Amount	95		47
Resourse Debt [Member] | Power [Member]
Debt Instrument [Line Items]
Long-term Debt, Carrying Amount	2,751		3,455
Long-term Debt, Fair Value	3,158	[1]	3,831	[1]
Transition Funding [Member] | PSE&G [Member]
Debt Instrument [Line Items]
Long-term Debt, Carrying Amount	895		1,090
Long-term Debt, Fair Value	1,016	[1]	1,245	[1]
Transition Funding II [Member] | PSE&G [Member]
Debt Instrument [Line Items]
Long-term Debt, Carrying Amount	44		55
Long-term Debt, Fair Value	47	[1]	59	[1]
Project Level, Non-Recourse Debt [Member] | Energy Holdings [Member]
Debt Instrument [Line Items]
Long-term Debt, Carrying Amount	95	[2]	47	[2]
Long-term Debt, Fair Value	95	[1],[2]	47	[1],[2]
Long-term Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Carrying Amount	8,094		8,940
Long-term Debt, Fair Value	9,283	[1]	9,836	[1]
Long-term Debt [Member] | PSEG [Member]
Debt Instrument [Line Items]
Long-term Debt, Carrying Amount	39		10
Long-term Debt, Fair Value	62	[1]	39	[1]
Long-term Debt [Member] | PSE&G [Member]
Debt Instrument [Line Items]
Long-term Debt, Carrying Amount	4,270		4,283
Long-term Debt, Fair Value	$ 4,905	[1]	$ 4,615	[1]

[1] Fair value excludes unamortized discounts, including amounts related to a Debt Exchange in 2009 between Power and Energy Holdings that is deferred at the PSEG parent level since the exchange was between subsidiaries of the same parent company.

[2] Fair value amounts as of December 31, 2011 include $50 million of nonrecourse project debt related to Dynegy.