Commitments And Contingent Liabilities (Guaranteed Obligations) (Detail) - PSEG Power [Member] - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Loss Contingencies [Line Items]
Face Value of Outstanding Guarantees	$ 1,351	$ 1,381
Exposure under Current Guarantees	66	118
Letters of Credit Margin Posted	10	10
Letters of Credit Margin Received	39	91
Counterparty Cash Collateral Deposited	0	0
Counterparty Cash Collateral Received	(1)	(2)
Net Broker Balance Deposited (Received)	282	115
Other Letters of Credit	$ 159	$ 180