Commitments And Contingent Liabilities (Regulatory Proceedings and Superstorm Sandy) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 New Jersey Clean Energy Program Unfavorable Regulatory Action [Member]	Jun. 30, 2014 PSE And G [Member]	Jun. 30, 2013 PSE And G [Member]	Jun. 30, 2014 PSE And G [Member]	Jun. 30, 2013 PSE And G [Member]	Jun. 30, 2014 PSE And G [Member] New Jersey Clean Energy Program Unfavorable Regulatory Action [Member]	Jun. 30, 2014 Power [Member]	Jun. 30, 2013 Power [Member]	Jun. 30, 2014 Power [Member]	Jun. 30, 2013 Power [Member]	Jun. 30, 2014 Power [Member] Superstorm Sandy [Member]	Jun. 30, 2014 Power [Member] Superstorm Sandy [Member]	Dec. 31, 2013 Power [Member] Superstorm Sandy [Member]	Dec. 31, 2012 Power [Member] Superstorm Sandy [Member]
Loss Contingencies [Line Items]
Aggregate funding for New Jersey Clean Energy Program					$ 345					$ 200
Discounted liability recorded-current										200
Discounted liability recorded-noncurrent										27
Operation and Maintenance	800	646	1,656	1,356		362	369	824	796		327	280	629	563	10	19	79	85
Proceeds from Insurance Recoveries																	25	19
Estimate of Total Costs required to restore damaged facilities	$ 579	$ 426	$ 579	$ 426		$ 95	$ 62	$ 95	$ 62		$ 484	$ 364	$ 484	$ 364