Financial Risk Management Activities (Schedule Of Net Notional Volume For Open Derivative Contracts) (Detail) - PSEG Power [Member] $ / mwh in Millions, $ / Derivative in Millions, $ / DTH in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2024 $ / mwh $ / Derivative $ / DTH	Dec. 31, 2023 $ / DTH $ / mwh $ / Derivative
Natural Gas Dth [Member]
Derivative [Line Items]
Net notional volume of derivative transactions | $ / DTH	86	66
Electricity MWh [Member]
Derivative [Line Items]
Net notional volume of derivative transactions	(62)	(60)
FTRs MWh [Member]
Derivative [Line Items]
Net notional volume of derivative transactions	16	19
Interest Rate Swaps [Member]
Derivative [Line Items]
Net notional volume of derivative transactions | $ / Derivative	1,750	2,000