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Discontinued Operations And Dispositions (Summary Of Carrying Amount Of Assets And Liabilities) (Details) (USD $)
In Millions
Sep. 30, 2011
Dec. 31, 2010
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Total Assets of Discontinued Operations$ 0$ 564
Total Liabilities of Discontinued Operations072
Power [Member] | PSEG Texas [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
Power [Member]
  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Total Assets of Discontinued Operations0564
Total Liabilities of Discontinued Operations$ 0$ 72