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Pension And OPEB (Schedule Of Pension And OPEB Costs) (Detail) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Pension Benefits [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total Benefits (Credits) Costs | $ 20 | $ (29)
Pension Benefits [Member] | Public Service Electric and Gas Company [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total Benefits (Credits) Costs | 13 | (18)
Pension Benefits [Member] | PSEG Power & Other |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total Benefits (Credits) Costs | 7 | (11)
OPEB [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total Benefits (Credits) Costs | (11) | (31)
OPEB [Member] | Public Service Electric and Gas Company [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total Benefits (Credits) Costs | (10) | (27)
OPEB [Member] | PSEG Power & Other |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total Benefits (Credits) Costs | $ (1) | $ (4)

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