Commitments And Contingent Liabilities (Regulatory Proceedings) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Loss Contingencies [Line Items]
Costs recognized in Operation and Maintenance Expense	$ 3,111	$ 3,069	$ 2,901
PSEG Power LLC
Loss Contingencies [Line Items]
Costs recognized in Operation and Maintenance Expense	1,040	$ 1,053	$ 1,046
Maximum [Member] | PSEG Power LLC | Sewaren 7 Claim [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 93