Commitments And Contingent Liabilities (Regulatory Proceedings and Superstorm Sandy) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				3 Months Ended				3 Months Ended			3 Months Ended	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Jun. 30, 2013	Mar. 31, 2014 New Jersey Clean Energy Program Unfavorable Regulatory Action [Member]	Mar. 31, 2014 PSE And G [Member]	Mar. 31, 2013 PSE And G [Member]	Jun. 30, 2013 PSE And G [Member]	Mar. 31, 2014 PSE And G [Member] New Jersey Clean Energy Program Unfavorable Regulatory Action [Member]	Mar. 31, 2014 Power [Member]	Mar. 31, 2013 Power [Member]	Jun. 30, 2013 Power [Member]	Mar. 31, 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								86
Operation and Maintenance	856	710			462	427			302	283		9	79	85
Proceeds from Insurance Recoveries													25	19
Estimate of Total Costs required to restore damaged facilities	$ 579		$ 426		$ 95		$ 62		$ 484		$ 364