Property, Plant And Equipment And Jointly-Owned Facilities (Schedule Of Property, Plant And Equipment) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	$ 28,249	$ 25,523
Total Generation	12,250	13,156
Other	732	658
Total	41,231	39,337
PSE&G [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	28,249	25,523
Total Generation	593	591
Other	275	233
Total	29,117	26,347
Power [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Total Generation	11,657	12,565
Other	98	90
Total	11,755	12,655
Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Total Generation	0	0
Other	359	335
Total	359	335
Electric Transmission [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	10,425	9,149
Electric Transmission [Member] | PSE&G [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	10,425	9,149
Electric Transmission [Member] | Power [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Electric Transmission [Member] | Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Electric Distribution [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	8,455	7,976
Electric Distribution [Member] | PSE&G [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	8,455	7,976
Electric Distribution [Member] | Power [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Electric Distribution [Member] | Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Gas Distribution [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	7,122	6,458
Gas Distribution [Member] | PSE&G [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	7,122	6,458
Gas Distribution [Member] | Power [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Gas Distribution [Member] | Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Construction Work In Progress [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	1,735	1,501
Total Generation	2,339	1,483
Construction Work In Progress [Member] | PSE&G [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	1,735	1,501
Total Generation	0	0
Construction Work In Progress [Member] | Power [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Total Generation	2,339	1,483
Construction Work In Progress [Member] | Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Total Generation	0	0
Other Plant [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	512	439
Other Plant [Member] | PSE&G [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	512	439
Other Plant [Member] | Power [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Other Plant [Member] | Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Fossil Production [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	4,923	7,096
Fossil Production [Member] | PSE&G [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	0	0
Fossil Production [Member] | Power [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	4,923	7,096
Fossil Production [Member] | Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	0	0
Nuclear Production [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	2,893	2,516
Nuclear Production [Member] | PSE&G [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	0	0
Nuclear Production [Member] | Power [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	2,893	2,516
Nuclear Production [Member] | Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	0	0
Nuclear Fuel In Service [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	745	783
Nuclear Fuel In Service [Member] | PSE&G [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	0	0
Nuclear Fuel In Service [Member] | Power [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	745	783
Nuclear Fuel In Service [Member] | Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	0	0
Other Production-Solar [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	1,350	1,278
Other Production-Solar [Member] | PSE&G [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	593	591
Other Production-Solar [Member] | Power [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	757	687
Other Production-Solar [Member] | Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	$ 0	$ 0