Commitments And Contingent Liabilities (Regulatory Proceedings) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
Jun. 30, 2011 gal years mW	Mar. 31, 2011 mW
New combined cycle generating facilities to be built under LCAPP		1,949
Mid merit electric power generation capacity to be built under LCAPP	2,000
Additional procurement of generation of power	1,600
PSE&G [Member] \| New Jersey Clean Energy Program Unfavorable Regulatory Action [Member]
Aggregate funding for New Jersey Clean Energy Program	$ 705
Discounted liability recorded-total	335
Discounted liability recorded-current	215
Discounted liability recorded-noncurrent	120
New Jersey Clean Energy Program Unfavorable Regulatory Action [Member]
Aggregate funding for New Jersey Clean Energy Program	$ 1,200

Additional Procurement Of Generation Of Power Capacity

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Mid Merit Electric Power Generation Capacity To Be Built Under LCAPP

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New Combined Cycle Generating Facilities To Be Built Under LCAPP

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- Definition

The carrying amount as of the balance sheet date of the combined total of loss contingency liabilities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9, 10, 11, 12
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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-Name Accounting Standards Codification
-Topic 450
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-Section 50
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The portion of the carrying amount as of the balance sheet date of the combined total of loss contingency liabilities which is expected to be resolved within one year or the normal operating cycle, if longer.

+ References

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The portion of the carrying amount as of the balance sheet date of the combined total of loss contingency liabilities which is expected to be resolved after one year or beyond the normal operating cycle, if longer.

+ References

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Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9, 10, 11, 12
-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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