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Pension, Other Postretirement Benefits (OPEB) and Savings Plans - Changes In The Benefit Obligation And The Fair Value Of Plan Assets (Parenthetical) (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]    
Deferred Costs and Other Assets $ 10,341 $ 9,337
Regulatory Assets 6,125 5,157
Pension Benefits [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Accumulated Other Comprehensive Income (Loss), Defined Benefit Pension and Other Postretirement Plans, Before Tax 107 143
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax 76 102
Regulatory Assets 1,227 1,427
Deferred Costs and Other Assets 134 141
Deferred Liabilities 9  
Public Service Electric and Gas Company    
Defined Benefit Plan Disclosure [Line Items]    
Regulatory Assets 6,641 5,430
Deferred Costs and Other Assets 6,544 5,601
Regulatory Assets 6,125 5,157
Public Service Electric and Gas Company | Pension Ratemaking deferral [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Regulatory Assets $ 103 $ 55