Income Taxes (Schedule Of Effective Tax Rates) (Detail)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
PSEG [Member]
Effective tax rate	40.70%	30.10%
Power [Member]
Effective tax rate	39.80%	39.80%
PSE And G [Member]
Effective tax rate	41.10%	29.40%