Discontinued Operations And Dispositions (Operating Results Reclassified To Discontinued Operations) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net Income	$ 0	$ 3	$ 0	$ 67
PSEG Texas [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating Revenues		29		92
Income Before Income Taxes		2		20
Net Income		$ 2		$ 13