Discontinued Operations And Dispositions (Summary Of Carrying Amount Of Assets And Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total Assets of Discontinued Operations	$ 0	$ 564
Total Liabilities of Discontinued Operations	0	72
Power [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total Assets of Discontinued Operations	0	564
Total Liabilities of Discontinued Operations	0	72
PSEG Texas [Member] | Power [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current Assets		28
Noncurrent Assets		536
Total Assets of Discontinued Operations		564
Current Liabilities		28
Noncurrent Liabilities		44
Total Liabilities of Discontinued Operations		$ 72