Income Taxes (Interest And Penalties Related To Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Line Items]
Accumulated Interest and Penalties on Uncertain Tax Positions	$ 70	$ 59	$ 66
PSE&G [Member]
Income Taxes [Line Items]
Accumulated Interest and Penalties on Uncertain Tax Positions	25	22	20
Power [Member]
Income Taxes [Line Items]
Accumulated Interest and Penalties on Uncertain Tax Positions	24	17	6
Energy Holdings [Member]
Income Taxes [Line Items]
Accumulated Interest and Penalties on Uncertain Tax Positions	$ 21	$ 20	$ 40