Income Taxes (Description Of Income Tax Years By Material Jurisdictions) (Details)	12 Months Ended
	Dec. 31, 2019
Federal [Member] | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2011-2018
Federal [Member] | PSEG Power LLC
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A
Federal [Member] | Public Service Electric and Gas Company
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	2011-2018
New Jersey [Member] | PSEG Power LLC
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A
New Jersey [Member] | Public Service Electric and Gas Company
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2011-2018
Pennsylvania [Member] | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2015-2018
Pennsylvania [Member] | PSEG Power LLC
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A
Pennsylvania [Member] | Public Service Electric and Gas Company
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2015-2018
Connecticut [Member] | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2016-2018
Connecticut [Member] | PSEG Power LLC
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A
Connecticut [Member] | Public Service Electric and Gas Company
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A
Maryland [Member] | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2016-2018
Maryland [Member] | PSEG Power LLC
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A
Maryland [Member] | Public Service Electric and Gas Company
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	2017-2018
New York [Member] | PSEG Power LLC
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A
New York [Member] | Public Service Electric and Gas Company
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A