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Commitments And Contingent Liabilities (Guaranteed Obligations) (Detail) - PSEG Power [Member] - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
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Loss Contingencies [Line Items] |  |
Face Value of Outstanding Guarantees | $ 1,435 | $ 1,601
Exposure under Current Guarantees | 77 | 198
Letters of Credit Margin Posted | 7 | 87
Letters of Credit Margin Received | 57 | 38
Counterparty Cash Collateral Deposited | 0 | 0
Counterparty Cash Collateral Received | (1) | (1)
Net Broker Balance Deposited (Received) | 347 | 1,522
Other Letters of Credit | $ 180 | $ 156

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