Income Taxes (Description Of Income Tax Years By Material Jurisdictions) (Details)	12 Months Ended
	Dec. 31, 2012
Federal [Member] | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2007-2011
Federal [Member] | Power [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A
Federal [Member] | PSE&G [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A
New Jersey [Member] | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2006-2011
New Jersey [Member] | Power [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A
New Jersey [Member] | PSE&G [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2006-2011
Pennsylvania [Member] | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2001-2011
Pennsylvania [Member] | Power [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A
Pennsylvania [Member] | PSE&G [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2000-2011
Connecticut [Member] | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2002-2011
Connecticut [Member] | Power [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A
Connecticut [Member] | PSE&G [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A
Texas [Member] | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2007-2011
Texas [Member] | Power [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A
Texas [Member] | PSE&G [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A
California [Member] | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2003-2011
California [Member] | Power [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A
California [Member] | PSE&G [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A
New York [Member] | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2009-2011
New York [Member] | Power [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2009-2011
New York [Member] | PSE&G [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A