v3.25.1
Debt and Credit Facilities - Changes in Long-Term Debt - Additional Information (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Debt Instrument [Line Items]    
Issuance of Long-Term Debt $ 1,900 $ 2,250
Repayments of Long-term Debt 0 250
Public Service Electric and Gas Company [Member]    
Debt Instrument [Line Items]    
Issuance of Long-Term Debt 900 1,000
Repayments of Long-term Debt 0 $ 250
Senior Notes Four Point Nine Zero Due Two Thousand Thirty [Member]    
Debt Instrument [Line Items]    
Issuance of Long-Term Debt $ 600  
Debt Instrument, Interest Rate, Stated Percentage 4.90%  
Senior Notes Five Point Four Zero Due Two Thousand Thirty Five [Member]    
Debt Instrument [Line Items]    
Issuance of Long-Term Debt $ 400  
Debt Instrument, Interest Rate, Stated Percentage 5.40%  
Medium Term Notes Five Point Zero Five Due Two Thousand Thirty Five [Member] | Public Service Electric and Gas Company [Member]    
Debt Instrument [Line Items]    
Issuance of Long-Term Debt $ 400  
Debt Instrument, Interest Rate, Stated Percentage 5.05%  
Medium Term Notes Five Point Five Zero Due Two Thousand Fifty Five [Member] | Public Service Electric and Gas Company [Member]    
Debt Instrument [Line Items]    
Issuance of Long-Term Debt $ 500  
Debt Instrument, Interest Rate, Stated Percentage 5.50%