Property, Plant And Equipment And Jointly-Owned Facilities (Schedule Of Jointly-Owned Facilities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Conemaugh [Member] \| Power [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Ownership Interest	23.00%
Plant	$ 397	$ 374
Accumulated Depreciation	142	139
Keystone [Member] \| Power [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Ownership Interest	23.00%
Plant	396	388
Accumulated Depreciation	151	140
Peach Bottom [Member] \| Power [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Ownership Interest	50.00%
Plant	1,087	886
Accumulated Depreciation	236	215
Salem [Member] \| Power [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Ownership Interest	57.00%
Plant	916	897
Accumulated Depreciation	236	254
Nuclear Support Facilities [Member] \| Power [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Plant	218	205
Accumulated Depreciation	49	37
Yards Creek [Member] \| Power [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Ownership Interest	50.00%
Plant	41	36
Accumulated Depreciation	24	23
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	161
Accumulated Depreciation	$ 69	$ 66

The period end amount owned by the reporting utility of a jointly owned utility plant in service.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 980

-SubTopic 360

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 10.C)

-URI http://asc.fasb.org/extlink&oid=6500719&loc=d3e659983-123033

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 10

-Section C

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- Definition

The period end amount of accumulated depreciation in a jointly owned electricity generation plant.

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- Definition

The proportionate share of interest (percent) in a jointly owned utility plant.

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