Income Taxes (Description Of Income Tax Years By Material Jurisdictions) (Details)	12 Months Ended
	Dec. 31, 2020
Federal [Member] | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2017-2019
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 | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2011-2019
NEW JERSEY | PSEG Power LLC
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A
NEW JERSEY | Public Service Electric and Gas Company
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2011-2019
PENNSYLVANIA | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2017-2019
PENNSYLVANIA | PSEG Power LLC
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A
PENNSYLVANIA | Public Service Electric and Gas Company
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2017-2019
CONNECTICUT | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2016-2019
CONNECTICUT | PSEG Power LLC
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A
CONNECTICUT | Public Service Electric and Gas Company
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A
MARYLAND | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2017-2019
MARYLAND | PSEG Power LLC
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A
MARYLAND | Public Service Electric and Gas Company
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A
NEW YORK | PSEG [Member]
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	2017-2019
NEW YORK | PSEG Power LLC
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A
NEW YORK | Public Service Electric and Gas Company
Income Taxes [Line Items]
Income Tax Year Subject to Examination by Material Jurisdictions	N/A