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	9 Months Ended
	Mar. 31, 2023 $ / Derivative $ / DTH $ / mwh	Sep. 30, 2023 $ / DTH $ / Derivative $ / mwh
Natural Gas Dth [Member]
Derivative [Line Items]
Net notional volume of derivative transactions | $ / DTH	49	59
Electricity MWh [Member]
Derivative [Line Items]
Net notional volume of derivative transactions	(60)	(60)
FTRs MWh [Member]
Derivative [Line Items]
Net notional volume of derivative transactions	24	23
Interest Rate Swaps [Member]
Derivative [Line Items]
Net notional volume of derivative transactions | $ / Derivative	1,050	1,700