Income Taxes (Possible Decrease In Total Unrecognized Tax Benefits Including Interest) (Details) $ in Millions	Dec. 31, 2017 USD ($)
Income Taxes [Line Items]
Possible Decrease in Total Unrecognized Tax Benefits including Interest in next twelve months	$ 69
Power [Member]
Income Taxes [Line Items]
Possible Decrease in Total Unrecognized Tax Benefits including Interest in next twelve months	35
PSE&G [Member]
Income Taxes [Line Items]
Possible Decrease in Total Unrecognized Tax Benefits including Interest in next twelve months	$ 30