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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)

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