Commitments And Contingent Liabilities (Future Minimum Lease Payments) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012
PSEG [Member]
2013	$ 0
2014	0
2015	3
2016	12
2017	13
Thereafter	186
Total Minimum Lease Payments	214
Power [Member]
2013	0
2014	1
2015	1
2016	1
2017	1
Thereafter	4
Total Minimum Lease Payments	8
PSE&G [Member]
2013	7
2014	6
2015	3
2016	3
2017	3
Thereafter	32
Total Minimum Lease Payments	54
Energy Holdings [Member]
2013	2
2014	2
2015	2
2016	2
2017	1
Thereafter	12
Total Minimum Lease Payments	$ 21

Amount of minimum lease payments for capital leases.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 13

-Paragraph 16

-Subparagraph a(ii)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Amount of minimum lease payments maturing in the next fiscal year following the latest fiscal year for capital leases.

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Amount of minimum lease payments maturing in the fifth fiscal year following the latest fiscal year for capital leases.

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Amount of minimum lease payments maturing in the forth fiscal year following the latest fiscal year for capital leases.

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Amount of minimum lease payments maturing in the third fiscal year following the latest fiscal year for capital leases.

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Amount of minimum lease payments maturing in the second fiscal year following the latest fiscal year for capital leases.

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Amount of minimum lease payments maturing after the fifth fiscal year following the latest fiscal year for capital leases.

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