Commitments And Contingent Liabilities (Regulatory Proceedings) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Loss Contingencies [Line Items]
Costs recognized in Operation and Maintenance Expense	$ 3,015	$ 2,901	$ 2,991
PSE&G [Member]
Loss Contingencies [Line Items]
Costs recognized in Operation and Maintenance Expense	1,575	1,458	1,465
Power [Member]
Loss Contingencies [Line Items]
Costs recognized in Operation and Maintenance Expense	999	$ 1,046	$ 1,139
Maximum [Member] | Sewaren 7 Claim [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 93