Commitments And Contingent Liabilities (Guaranteed Obligations) (Detail) - PSEG Power [Member] - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Loss Contingencies [Line Items]
Face Value of Outstanding Guarantees	$ 1,747	$ 1,959
Exposure under Current Guarantees	128	176
Letters of Credit Margin Posted	335	80
Letters of Credit Margin Received	20	242
Counterparty Cash Collateral Deposited	0	60
Counterparty Cash Collateral Received	(1)	(1)
Net Broker Balance Deposited (Received)	2,162	785
Other Letters of Credit	$ 156	$ 67