Financial Risk Management Activities - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Aoci, cash flow hedge, cumulative gain (loss), after tax	$ 36	$ 3
Unrealized gain to be reclassified to earnings during the next twelve months	2
Reclassification from accumulated other comprehensive income (loss), net of tax	(3)	(225)	$ (30)
Derivative, fair value, net	75	49
Issuance of Long-term Debt	3,350	2,800	2,850
Interest rate hedge derivative at fair value, net	32
PSEG Power
Derivatives, Fair Value [Line Items]
Fair value of derivatives with credit-risk related contingent features	17	77
Aggregate fair value of derivative contracts in a liability position that contains triggers for additional collateral	11	3
Additional collateral aggregate fair value	6	74
Derivative, fair value, net	43	60
Public Service Electric and Gas Company [Member]
Derivatives, Fair Value [Line Items]
Issuance of Long-term Debt	2,100	1,800	900
Total credit exposure with counterparties	0
Interest Rate Swap \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	$ 32	(11)
Investment Grade - External Rating \| PSEG Power
Derivatives, Fair Value [Line Items]
Percentage of credit exposure	95.00%
Investment Grade - External Rating \| PSEG Power \| Minimum [Member]
Derivatives, Fair Value [Line Items]
Percentage of credit exposure	10.00%
Cash Flow Hedges [Member]
Derivatives, Fair Value [Line Items]
Reclassification from accumulated other comprehensive income (loss), net of tax	$ 9	3	$ (3)
Three Year Variable Rate Term Loan \| PSEG Power
Derivatives, Fair Value [Line Items]
Issuance of Long-term Debt	1,250
Three Year Variable Rate Term Loan \| Interest Rate Swap \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, fair value, net	$ 5	$ 5

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Total credit exposure with counterparties

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The aggregate fair value of additional assets that would be required to be posted as collateral for derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period.

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Fair value, after effect of master netting arrangement and deduction of obligation to return financial collateral not offset and financial instrument subject to master netting arrangement not offset, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and contract can be net settled by means outside contract or delivery of asset. Includes derivative not subject to master netting arrangement or similar agreement.

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Amount of cash inflow from issuance of long-term debt classified as other.

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