Commitments And Contingent Liabilities (Guaranteed Obligations) (Detail) - PSEG Power [Member] - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Loss Contingencies [Line Items]
Face Value of Outstanding Guarantees	$ 1,536	$ 1,601
Exposure under Current Guarantees	101	198
Letters of Credit Margin Posted	22	87
Letters of Credit Margin Received	78	38
Counterparty Cash Collateral Deposited	0	0
Counterparty Cash Collateral Received	(11)	(1)
Net Broker Balance Deposited (Received)	738	1,522
Other Letters of Credit	$ 180	$ 156