Income Taxes (Description Of Income Tax Years By Material Jurisdictions) (Details) (Minimum [Member])	12 Months Ended
	Dec. 31, 2011
Federal [Member] | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2007
Federal [Member] | Power [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2007
Federal [Member] | PSE&G [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2007
New Jersey [Member] | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2006
New Jersey [Member] | PSE&G [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2006
Pennsylvania [Member] | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2009
Pennsylvania [Member] | PSE&G [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2008
Connecticut [Member] | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2007
Texas [Member] | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2007
California [Member] | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2003
New York [Member] | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2004
New York [Member] | Power [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2004