Long-Term Investments (Schedule Of Long Term Investments) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Long-Term Investments [Line Items]
Total Long-Term Investments		$ 1,050	$ 1,233
Dividends in equity method investments		18	16	$ 17
Power [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments		102	119
PSE&G [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments		299	330
Life Insurance And Supplemental Benefits [Member] | PSE&G [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments		140	150
Solar Loan Investments [Member] | PSE&G [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments		159	175
Lease Investments [Member] | Energy Holdings [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments		649	784
Partnerships And Corporate Joint Ventures [Member] | Power [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments	[1]	102	119
Other Investments [Member] | PSE&G [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments		$ 0	$ 5

[1] During the three years ended December 31, 2016, 2015 and 2014, dividends from these investments were $18 million, $16 million and $17 million, respectively.