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Pension, Other Postretirement Benefits (OPEB) and Savings Plans - Schedule of Pension and OPEB Costs (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Pension Benefits [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total Net Benefit (Credits) Costs $ 69 $ 409 $ (115)
Pension Benefits [Member] | Public Service Electric and Gas Company [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total Net Benefit (Credits) Costs 43 50 (70)
Pension Benefits [Member] | PSEG Power & Other      
Defined Benefit Plan Disclosure [Line Items]      
Total Net Benefit (Credits) Costs 26 359 (45)
OPEB [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total Net Benefit (Credits) Costs 6 (43) (124)
OPEB [Member] | Public Service Electric and Gas Company [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Total Net Benefit (Credits) Costs (2) (42) (109)
OPEB [Member] | PSEG Power & Other      
Defined Benefit Plan Disclosure [Line Items]      
Total Net Benefit (Credits) Costs $ 8 $ (1) $ (15)