v3.26.1
Financial Risk Management Activities - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Derivatives, Fair Value [Line Items]      
Aoci, cash flow hedge, cumulative gain (loss), after tax $ 27   $ 24
Unrealized gain to be reclassified to earnings during the next twelve months 4    
Reclassification from AOCL, net of tax (12) $ (2)  
Derivative, fair value, net (113)   (69)
Issuance of Long-Term Debt 1,000 1,900  
PSEG Power      
Derivatives, Fair Value [Line Items]      
Fair value of derivatives with credit-risk related contingent features 146   96
Aggregate fair value of derivative contracts in a liability position that contains triggers for additional collateral 20   11
Additional collateral aggregate fair value 126   85
Derivative, fair value, net (122)   (73)
Public Service Electric and Gas Company [Member]      
Derivatives, Fair Value [Line Items]      
Issuance of Long-Term Debt 1,000 900  
Total credit exposure with counterparties 118    
Three Year Variable Rate Term Loan | PSEG Power      
Derivatives, Fair Value [Line Items]      
Issuance of Long-Term Debt 500    
Interest Rate Swap [Member] | Designated as Hedging Instrument      
Derivatives, Fair Value [Line Items]      
Derivative, fair value, net 9   4
Interest Rate Swap [Member] | Designated as Hedging Instrument | Three Year Variable Rate Term Loan      
Derivatives, Fair Value [Line Items]      
Derivative, fair value, net 8    
Interest Rate Swap [Member] | Designated as Hedging Instrument | Three Year Variable Rate Term Loan | PSEG Power      
Derivatives, Fair Value [Line Items]      
Derivative, fair value, net $ 1    
Investment Grade - External Rating | PSEG Power      
Derivatives, Fair Value [Line Items]      
Percentage of credit exposure 98.00%    
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 AOCL, net of tax $ 1 $ 0 $ 4