Property, Plant And Equipment And Jointly-Owned Facilities (Schedule Of Jointly-Owned Facilities) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Conemaugh [Member] | Power [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Ownership Interest	23.00%
Plant	$ 417	$ 408
Accumulated Depreciation	$ 192	178
Keystone [Member] | Power [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Ownership Interest	23.00%
Plant	$ 416	409
Accumulated Depreciation	$ 200	187
Peach Bottom [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Ownership Interest	50.00%
Peach Bottom [Member] | Power [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Ownership Interest	50.00%
Plant	$ 1,334	1,328
Accumulated Depreciation	$ 389	348
Salem [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Ownership Interest	57.00%
Salem [Member] | Power [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Ownership Interest	57.00%
Plant	$ 1,196	1,147
Accumulated Depreciation	333	277
Nuclear Support Facilities [Member] | Power [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Plant	244	239
Accumulated Depreciation	$ 95	81
Yards Creek [Member] | Power [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Ownership Interest	50.00%
Plant	$ 48	44
Accumulated Depreciation	$ 26	26
Merrill Creek Reservoir [Member] | Power [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Ownership Interest	14.00%
Plant	$ 1	1
Accumulated Depreciation	0	0
Transmission Facilities [Member] | PSE&G [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Plant	162	162
Accumulated Depreciation	$ 58	$ 58