Financial Risk Management Activities - Schedule of Net Notional Volume for Open Derivative Contracts (Details) - PSEG Power	9 Months Ended	12 Months Ended
	Sep. 30, 2024 $ / MWh $ / $ $ / dth	Dec. 31, 2023 $ / MWh $ / $ $ / dth
Natural Gas Dth [Member]
Derivative [Line Items]
Net notional volume of derivative transactions | $ / dth	66	66
Electricity MWh [Member]
Derivative [Line Items]
Net notional volume of derivative transactions	(57)	(60)
FTRs MWh [Member]
Derivative [Line Items]
Net notional volume of derivative transactions	21	19
Interest Rate Swaps [Member]
Derivative [Line Items]
Net notional volume of derivative transactions | $ / $	1,750	2,000