Financial Risk Management Activities - Schedule of Net Notional Volume for Open Derivative Contracts (Details) - PSEG Power [Member]	6 Months Ended	12 Months Ended
	Jun. 30, 2025 $ / $ $ / MWh $ / dth	Dec. 31, 2024 $ / MWh $ / $ $ / dth
Natural Gas Dth [Member]
Derivative [Line Items]
Net notional volume of derivative transactions | $ / dth	73	70
Electricity MWh [Member]
Derivative [Line Items]
Net notional volume of derivative transactions	(62)	(49)
FTRs MWh [Member]
Derivative [Line Items]
Net notional volume of derivative transactions	27	16
Interest Rate Swaps [Member]
Derivative [Line Items]
Net notional volume of derivative transactions | $ / $	100	2,290