Income Taxes (Possible Decrease In Total Unrecognized Tax Benefits Including Interest) (Details) $ in Millions	Dec. 31, 2020 USD ($)
Income Taxes [Line Items]
Possible Decrease in Total Unrecognized Tax Benefits including Interest in next twelve months	$ 12
Public Service Electric and Gas Company
Income Taxes [Line Items]
Possible Decrease in Total Unrecognized Tax Benefits including Interest in next twelve months	12
PSEG Power LLC
Income Taxes [Line Items]
Possible Decrease in Total Unrecognized Tax Benefits including Interest in next twelve months	$ 0