Organization, Basis Of Presentation And Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
TEFA									$ 0	$ 0	$ 68
Operating Revenues	$ 2,278	$ 2,688	$ 2,314	$ 3,135	$ 2,773	$ 2,641	$ 2,249	$ 3,223	10,415	10,886	9,968
Net Income									1,679	1,518	1,243
Total Assets	37,535				35,287				37,535	35,287	32,480
Power [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Operating Revenues	1,082	1,096	1,025	1,725	1,610	1,138	986	1,700	4,928	5,434	5,063
Basis Adjustment	(986)				(986)				(986)	(986)
Net Income									856	760	644
Total Assets	12,250				12,037				$ 12,250	12,037
Power [Member] | Nuclear Production [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives									60 years
Power [Member] | Pumped Storage Facilities [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives									76 years
Power [Member] | Solar Assets [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives									25 years
Power [Member] | Minimum [Member] | General Plant Assets [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives									3 years
Power [Member] | Minimum [Member] | Fossil Production [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives									19 years
Power [Member] | Maximum [Member] | General Plant Assets [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives									20 years
Power [Member] | Maximum [Member] | Fossil Production [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives									79 years
PSE&G [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
TEFA									$ 0	0	68
Operating Revenues	1,402	$ 1,766	$ 1,466	$ 2,002	1,531	$ 1,655	$ 1,435	$ 2,145	6,636	6,766	6,655
Basis Adjustment	986				986				986	986
Net Income									787	725	612
Total Assets	$ 23,677				$ 22,186				$ 23,677	$ 22,186
Operating Revenues [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
TEFA											74
Tefa And Grt [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
TEFA											$ 68