Income Taxes (Description Of Income Tax Years By Material Jurisdictions) (Details)	12 Months Ended
	Dec. 31, 2017
Federal [Member] | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2011-2016
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	2006-2016
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	2011-2016
Pennsylvania [Member] | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2014-2016
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	2014-2016
Connecticut [Member] | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2016
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	2008-2016
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	2006-2016
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	2014-2016
New York [Member] | Power [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2014-2016
New York [Member] | PSE&G [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A