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Pension And OPEB (Schedule Of Pension And OPEB Costs) (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Pension Benefits [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Total Benefits (Credits) Costs | $ 349 | $ (28) | $ 389 | $ (86)
Pension Benefits [Member] | Public Service Electric and Gas Company [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Total Benefits (Credits) Costs | 10 | (18) | 37 | (53)
Pension Benefits [Member] | PSEG Power & Other |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Total Benefits (Credits) Costs | 339 | (10) | 352 | (33)
OPEB [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Total Benefits (Credits) Costs | (11) | (31) | (32) | (93)
OPEB [Member] | Public Service Electric and Gas Company [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Total Benefits (Credits) Costs | (11) | (27) | (31) | (82)
OPEB [Member] | PSEG Power & Other |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Total Benefits (Credits) Costs | $ 0 | $ (4) | $ (1) | $ (11)

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