Financial Risk Management Activities (Schedule Of Net Notional Volume For Open Derivative Contracts) (Detail) - PSEG Power [Member] $ / mwh in Millions, $ / DTH in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2022 $ / mwh $ / DTH	Dec. 31, 2021 $ / DTH $ / mwh
Natural Gas Dth [Member]
Derivative [Line Items]
Net notional volume of derivative transactions | $ / DTH	53	47
Electricity MWh [Member]
Derivative [Line Items]
Net notional volume of derivative transactions	(75)	(76)
FTRs MWh [Member]
Derivative [Line Items]
Net notional volume of derivative transactions	18	27