Organization, Basis Of Presentation And Summary Of Significant Accounting Policies (Amounts And Average Rates Used To Calculate IDC Or AFUDC) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
PSE&G [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
IDC/AFUDC	$ 66	$ 65	$ 44
Average Rate	7.81%	8.01%	8.09%
Power [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
IDC/AFUDC	$ 54	$ 27	$ 24
Average Rate	4.87%	5.14%	5.14%