Long-Term Investments (Schedule Of Long Term Investments) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Long-Term Investments [Line Items]
Total Long-Term Investments	$ 1,307		$ 1,313
Dividends in equity method investments	17		11		17
Power [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments	121		123
PSE&G [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments	348		361
Life Insurance And Supplemental Benefits [Member] | PSE&G [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments	156		158
Solar Loan Investments [Member] | PSE&G [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments	187		196
Lease Investments [Member] | Energy Holdings [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments	836		825
Partnerships And Corporate Joint Ventures [Member] | Power [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments	121	[1]	123	[1]
Other Investments [Member] | PSE&G [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments	5		7
Equity Method Investments [Member] | Partnerships And Corporate Joint Ventures [Member] | Energy Holdings [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments	2	[1]	3	[1]
Cost Method Investments [Member] | Partnerships And Corporate Joint Ventures [Member] | Energy Holdings [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments	$ 0	[2]	$ 1	[2]

[1] During the three years ended December 31, 2014, 2013 and 2012, the amount of dividends from these investments was $17 million, $11 million and $17 million, respectively.

[2] Reflects Energy Holdings' investments in certain companies in which it does not have the ability to exercise significant influence. Such investments are accounted for under the cost method.