Commitments And Contingent Liabilities (Face Value Of Outstanding Guarantees, Current Exposure And Margin Positions) (Detail) - PSEG Power LLC [Member] - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Other Commitments [Line Items]
Face Value of Outstanding Guarantees	$ 1,381	$ 1,601
Exposure under Current Guarantees	118	198
Letters of Credit Margin Posted	10	87
Letters of Credit Margin Received	91	38
Counterparty Cash Margin Deposited	0	0
Counterparty Cash Margin Received	(2)	(1)
Net Broker Balance Deposited (Received)	115	1,522
Other Letters of Credit	$ 180	$ 156