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Trust Investments (Proceeds From The Sales Of And The Net Realized Gains On Securities) (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Schedule of Trust Investments [Line Items] |  |  |  |
Net Gains (Losses) on NDT Fund Investments |  | $ (265) | $ 194 | $ 253
Nuclear Decommissioning Trust (NDT) Fund [Member] |  |  |  |
Schedule of Trust Investments [Line Items] |  |  |  |
Proceeds from sales | [1] | 1,521 | 1,930 | 2,031
Gross Realized Gains |  | 86 | 236 | 214
Gross Realized Losses |  | 136 | 70 | 94
Net Realized Gains (Losses) on NDT Fund | [2] | (50) | 166 | 120
Net Unrealized Gains (Losses) on Equity Securities |  | (205) | 19 | 120
Impairment of Available-for-Sale Debt Securities | [3] | 0 | 0 | (3)
Net Gains (Losses) on NDT Fund Investments |  | (255) | 185 | 237
Rabbi Trust [Member] |  |  |  |
Schedule of Trust Investments [Line Items] |  |  |  |
Proceeds from sales |  | 65 | 170 | 203
Gross Realized Gains |  | 5 | 16 | 19
Gross Realized Losses |  | 9 | 8 | 6
Net Realized Gains (Losses) on NDT Fund | [4] | (4) | 8 | 13
Net Unrealized Gains (Losses) on Equity Securities |  | (6) | 1 | 3
Net Gains (Losses) on NDT Fund Investments |  | $ (10) | $ 9 | $ 16
[1] | Includes activity in accounts related to the liquidation of funds being transitioned within the trust.
[2] | The cost of these securities was determined on the basis of specific identification.
[3] | PSEG Power recognized an impairment of available-for-sale debt securities in 2020. PSEG Power’s policy is to sell all securities that are rated below investment grade.
[4] | The cost of these securities was determined on the basis of specific identification.

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