Commitments And Contingent Liabilities (Face Value Of Outstanding Guarantees, Current Exposure And Margin Positions) (Detail) - PSEG Power LLC [Member] - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Other Commitments [Line Items]
Face Value of Outstanding Guarantees	$ 1,601	$ 1,959
Exposure under Current Guarantees	198	176
Letters of Credit Margin Posted	87	80
Letters of Credit Margin Received	38	242
Counterparty Cash Margin Deposited	0	60
Counterparty Cash Margin Received	(1)	(1)
Net Broker Balance Deposited (Received)	1,522	785
Other Letters of Credit	$ 156	$ 67